ground penetration tip

专利摘要:
SOIL PENETRATION TIP A soil penetration tip (14, 150, 180, 190, 210) is provided from a tooth bar (10) to a base edge (18) of a soil penetration implement (1 , 6), in which the tooth arrangement (10) contains an adapter (12, 170) configured to be attached to the base edge (18) of the ground penetrating implement (1, 6) and having an adapter nose that extends forward (26). In various embodiments, the ground penetration tip (14, 150, 180, 190, 210) is configured to excavate the work material in diverse earthwork environments.
公开号:BR112014008337B1
申请号:R112014008337-1
申请日:2012-10-05
公开日:2020-12-22
发明作者:William J. Renski；James Robert Lahood；Sudha Kottakapu；Thomas Marshall Gongdon
申请人:Caterpillar Inc.；
IPC主号:

专利说明:

description Technical Field
[001] The present disclosure generally refers to earth working machines with earth engaging implements and, specifically, to tooth assemblies with adapter systems and replaceable tip attached to the main or base edges of such land penetration implements. Historic
[002] Earthmoving machines known in the art are used to dig earth or stone or move loose work material from one location to another in a workplace. These machines and equipment typically include a body portion housing the engine and having rear wheels, tracks or similar components driven by the engine, and an elevated cab for the operator. The machines and equipment also include articulated mechanical arms or other types of connections, such as Z-bar connections, to handle one or more machine implements. The connections are able to raise and lower the attachments and rotate the attachments to penetrate the ground work material or other work material in a desired way. In earthmoving applications, machine implements or other equipment are buckets provided with a beveled flap or blade on a base edge to move or excavate dirt or other types of work material.
[003] To facilitate the earth moving process, and to prolong the life of the implement, a plurality of tooth assemblies are spaced along the base edge of the implement and attached to the surface of the implement. Tooth assemblies project forward from the base edge as a first point of contact and penetration with the work material, and to reduce the amount of wear on the base edge. With this arrangement, the tooth assemblies are subjected to wear and breakage caused by repetitive penetration with the work material. Eventually, tooth assemblies must be replaced, but the implement remains usable through multiple cycles of replacement tooth assemblies. Depending on the variety of uses and work material for the equipment, it may also be desirable to change the type or shape of the tooth assemblies to use the implement more effectively.
[004] In many deployments, installation and replacement of tooth assemblies can be made easier by providing tooth assemblies as a two-part system. The system may include an adapter that is attached to the base edge of the implement, a ground penetration tip configured to be attached to the adapter, and a retention mechanism securing the tip to the adapter during use. The adapter can be welded, bolted or otherwise attached to the base edge, and then the tip can be attached to the adapter and held in place by the retention mechanism. The tip suffers most of the impact and abrasion caused by penetration with the work material, and wears out more quickly and breaks more often than the adapter. Consequently, multiple tips can be attached to the adapter, worn and replaced before the adapter itself is replaced. Eventually, the adapter may wear out and require replacement before the base edge of the implement wears out.
[005] An example of an excavation tooth assembly is illustrated and described in U.S. Patent No. 4,949,481 to Fellner. The digging tooth for a bucket has a concave top surface and a convex bottom surface that intersects to form a cutting edge ahead. The side walls connect the two surfaces and are concave in the shape of a moldboard. The rear portion of the tooth is provided with a support assembly for mounting the digging tooth in a bucket. The bottom surface continually diverges from the cutting edge ahead to the rear portion; whereas the upper surface first converges then diverges from the cutting edge ahead to the rear portion. The rear portion includes a rod receiving the cavity with the upper and lower walls that converge as the cavity extends forward within the tooth to provide the cavity with a triangular shape or wedge when viewed in profile.
[006] An example of a loader bucket tooth is provided in U.S. Patent No. 5,018,283 to Fellner. The digging tooth for a loader bucket includes an upper surface having a concave configuration and a bottom surface having a forward flat portion and a convex rear portion. The forward flat portion and the upper surface intersect to form a forward cutting edge. The side walls connect the two surfaces and are concave with a coulter shape. The rear portion of the tooth is provided with a mounting bracket to mount it on a bucket. The bottom surface continuously converges from the cutting edge ahead to the rear portion; whereas the upper surface first converges then diverges from the cutting edge ahead to the rear portion. The rear portion includes a rod receiving the cavity with the bottom wall extending inward, and an upper wall having a first portion extending approximately parallel to the bottom wall and a second portion angled towards the bottom wall and extending up to a rounded front portion.
[007] U.S. Patent No. 2,982,035 to Stephenson provides an example of an excavator tooth having an adapter that attaches to the leading edge of a diver's body, and a tip that attaches to the adapter. The tip includes an upper surface and a lower surface that converge at a relatively sharp point, with the tip having a horizontal plane of symmetry. The upper and lower surfaces of the adapter have recessed central surfaces, with the upper central surface having a forward surface that diverges upwards from the plane of symmetry and rounds off a surface ahead of the adapter. The inside of the tip has corresponding flat surfaces that are received by the central surfaces of the adapter, and include the forward surfaces diverging from the plane of symmetry as they approach a surface ahead, with one of the forward surfaces of the tip in contact with the surface in front of the adapter when the parts are properly assembled.
[008] The implements as discussed can be used in a variety of applications having different operating conditions. In loader applications, buckets installed in front of wheel or rail loaders have the bottom surfaces and base edges scraping along the earth and digging into the earth or pile of work material as the loader machine is driven forward. The forces in the tooth assembly as the bucket enters the pile push the tip in penetration with the corresponding adapter. The bucket is then lifted and installed with the work material load, and the loader moves and throws the work material in another location. As the bucket is lifted through the work material, the force is exerted downwards on the tooth assembly. With the combination of scraping and penetration with the work material and, in other types of bottom wear applications where the bottom surface typically wears out more quickly due to more frequent penetration with the work material, the wear material the tip wears away from the front of the tip and the bottom surface of the tip and adapter. The loss of wear material in front of the tip converts the initially pointed front end of the tip into a rounded blind surface, similar to changing the hand from having fingers extended to having a closed fist. The worn shape is less efficient when digging through the work material as the loader moves forward, although the tip may still have enough wear material to be used on the implement for a while before replacement.
[009] In excavator applications and other types of top wear applications where the top surface typically wears out more quickly due to more frequent penetration with the work material, buckets engage and pass through the earth or work material at different angles than in bottom wear applications, such as loader applications described above, and therefore cause the wear material of tooth assemblies to wear in a different way. An excavator device, such as a backhoe, initially engages the work material with the base edge and tooth assemblies oriented close to the perpendicular to the surface of the work material and generally enters the work material in a downward motion . After the initial penetration into the work material, the mechanical arm still breaks the work material and collects a load of the work material in the bucket by removing the bucket back to the digger machine and rotating the bucket inward to collect the work material in the bucket. The complex movement of the bucket causes wear on the tip of the tooth assembly during the downward penetration movement when forces act to push the tip into penetration with the adapter. After the initial penetration, the bucket is removed towards the machine and rotated still, in a recoil movement to break the work material and start to load the implement. During this movement, the forces initially act in a direction that is initially mostly normal to the upper surface of the tooth assembly, and the work material passes over and around the upper part of the tooth causing wear on the upper surface of the tooth. As the implement rotates more and is removed through the work material, the forces and work material again act on the tip of the tooth to cause wear on the tip. As with loader tooth assemblies, excavator tooth assemblies wear out to less efficient shapes after repeated investing in the work material, but can still retain enough wear material for continuous use without replacement. Considering this, a need exists for improved tooth mounting designs for the loader and digger attachments that distribute the wear material, so that the tips dig into the work material more efficiently as the wear material wears out and reshapes the tips until the tips must finally be replaced. Exhibition Summary
[0010] In one aspect of the present exhibition, the invention relates to a ground-penetrating tip of a tooth arrangement to a base edge of a soil-penetrating implement, in which the tooth arrangement contains a configured adapter to be attached to the edge of the base of the ground-penetrating implement, also having an adapter nose that extends forward. The ground-penetrating tip contains a rear edge, an upper outer surface, a lower outer surface, where the upper outer surface and the lower outer surface extend forward from the rear edge and converge to the front edge, outer side surfaces oppositely arranged that extend downwardly from the upper outer surface to the lower outer surface, an inner surface that extends into the ground-penetrating tip from the rear edge and that defines a tip cavity within the soil-penetrating tip having a complementary shape for the adapter's nose to receive the adapter's nose in it, and a relief that extends into the ground penetrating tip from the lower outer surface, and which is located near the front edge.
[0011] In another aspect of the present exhibition, the invention relates to a ground-penetrating tip of a tooth arrangement to a base edge of a soil-penetrating implement, in which the tooth arrangement contains a configured adapter to be attached to the edge of the base of the ground-penetrating implement, also having an adapter nose that extends forward. The ground-penetrating tip may contain a rear edge, an upper outer surface, a lower outer surface, where the upper outer surface and the lower outer surface extend forward from the rear edge and converge to the front edge, lateral surfaces oppositely arranged outer edges extending downwardly from the upper outer surface to the outer bottom surface, and an inner surface that extends into the ground-penetrating tip from the rear edge and that defines a cavity for the tip within the tip of penetration into the ground having a complementary shape for the adapter's nose to receive the adapter's nose. The upper outer surface may have a rear portion that extends forward from the rear edge to a first transition area, a front portion that extends forward from the first transition area to a second transition area, and a portion from the tip that extends forward from the second transition area to the front edge, where the distances between the lower outer surface and the posterior portion, the frontal portion and the tip portion decrease according to the posterior portion, the frontal portion and the tip portion extends away from the rear edge, where the rear portion and a first line parallel to the longitudinal axis of the ground-penetrating tip define a first angle facing down, the front portion and a second line parallel to the axis longitudinal define a second angle facing down, and the tip portion and a third line parallel to the longitudinal axis define a third angle facing down, and in q u and the second downward angle is less than the first downward angle and the third downward angle.
[0012] In yet another aspect of the present exhibition, the invention relates to a soil-penetrating tip of a tooth arrangement to a base edge of a soil-penetrating implement, in which the tooth arrangement contains an adapter configured to be attached to the base edge of the ground penetrating implement, also having an adapter nose that extends forward. The ground-penetrating tip may contain a rear edge, an upper outer surface, a lower outer surface, where the upper outer surface and the lower outer surface extend forward from the rear edge and converge to the front edge, lateral surfaces oppositely arranged outer edges extending downwardly from the upper outer surface to the outer bottom surface, and an inner surface that extends into the ground-penetrating tip from the rear edge and that defines a cavity for the tip within the tip of penetration into the ground having a complementary shape for the adapter's nose to receive the adapter's nose in it. Each of the outer lateral surfaces may have a rear portion that extends forward from the rear edge to the first transition area, a front portion that extends forward from the first transition area to a second transition area, and a the portion of the tip extending forward from the second transition area to the front edge, where the distance between the outer lateral surfaces decreases as the posterior portion and the tip portion extend away from the posterior edge, where the portion posterior and a first line parallel to the longitudinal axis of the ground penetration tip define a first tapering angle, and the tip portion and a second line parallel to the longitudinal axis define a second tapering angle, and in which the second tapering angle is greater than the first taper angle.
[0013] Additional aspects of the invention are defined by the claims of this patent. Description of Drawings
[0014] Figure 1 is an isometric view of a bucket.
[0015] loader having the tooth assemblies in accordance with the present disclosure attached to its base edge;
[0016] Figure 2 is an isometric view of an excavator bucket having the tooth assemblies in accordance with the present disclosure attached to its base edge;
[0017] Figure 3 is an isometric view of a tooth assembly in accordance with the present disclosure;
[0018] of Figure A 3; Figure 4 is a side view of the tooth assembly
[0019] Figure 5 is an isometric view of an adapter of the tooth assembly of Figure 3;
[0020] Figure 6 is a side view of the adapter of Figure 5 attached to a base edge and an implement;
[0021] Figure 7 is a top view of the adapter of Figure 5;
[0022] Figure 8 is a bottom view of the adapter of Figure 5;
[0023] Figure 9 is a cross-sectional view of adapter 7; of Figure 5 obtained through line 9—9 of Figure
[0024] Figure 10 is an isometric view of one end of the tooth assembly of Figure 3;
[0025] 10; Figure 11 is a side view of the tip of Figure
[0026] 10; Figure 12 is a top view of the tip of Figure
[0027] 10; Figure 13 is a bottom view of the tip of Figure
[0028] 10; Figure 14 is a front view of the tip of Figure
[0029] Figure 15 is a cross-sectional view of tip 12; of Figure 10 obtained through line 15—15 of Figure
[0030] Figure 16 is a cross-sectional view of tip 14; of Figure 10 obtained through line 16—16 of Figure
[0031] Figure 17 is a rear view of the tip of Figure 10;
[0032] Figure 18 is an isometric view of an alternative configuration of a tip for a tooth assembly in accordance with this
[0033] Figure 19 is a top view of the tip of Figure 18;
[0034] Figure 20 is a front view of the tip of Figure 18;
[0035] Figure 21 is a side view of the tip of Figure 18;
[0036] Figure 22 is a cross-sectional view of the tip of Figure 18 obtained through line 22—22 of Figure 19;
[0037] Figure 23 is an isometric view of an alternative configuration of an adapter for a tooth assembly in accordance with the present disclosure;
[0038] Figure 24 is a side view of the adapter in Figure 23;
[0039] Figure 25 is a cross-sectional view of the adapter of Figure 23 obtained through line 25—25 of Figure 24;
[0040] Figure 26 is an isometric view of an alternative configuration of a tip for a tooth assembly in accordance with the present disclosure;
[0041] 26; Figure 27 is a side view of the tip of Figure
[0042] 26; Figure 28 is a front view of the tip of Figure
[0043] 26; Figure 29 is a top view of the tip of Figure
[0044] Figure 30 is a cross-sectional view of the tip of 29; Figure 26 obtained through line 30—30 in Figure
[0045] Figure 31 is an isometric view of an additional alternative configuration of a tip for a tooth assembly in accordance with the present disclosure;
[0046] Figure 32 is a side view of the tip of Figure 31;
[0047] Figure 33 is a front view of the tip of Figure 31;
[0048] Figure 34 is a front view of the tip of Figure 31 with the front edge partially raised to show the surface
[0049] The external figure of 35 background; it is a rear view of the tip of Figure 31;
[0050] Figure 36 is a cross-sectional view of the tip of Figure 31 obtained through line 36—36 of Figure 35;
[0051] Figure 37 is an isometric view of an additional alternative of a tip for a tooth assembly in accordance with the present disclosure;
[0052] Figure 38 is a top view of the tip of Figure 37;
[0053] Figure 39 is a front view of the tip of Figure 37;
[0054] Figure 40 is a side view of the tip of Figure 37;
[0055] Figure 41 is a cross-sectional view of the tip of Figure 37 obtained through line 41—41 of Figure 39;
[0056] Figure 42 is an isometric view of an upper wear tooth in accordance with the present disclosure;
[0057] Figure 43 is a front view of the tooth of Figure 42;
[0058] Figure 44 is a side view of the tooth of Figure 42;
[0059] Figure 45 is a top view of the tooth of Figure 42;
[0060] Figure 46 is an isometric view of a bottom wear tooth in accordance with the present disclosure;
[0061] Figure 47 is a front view of the tooth of Figure 46;
[0062] Figure 48 is a side view of the tooth of Figure 46; and
[0063] Figure 49 is a top view of the tooth in Figure 46;
[0064] Figure 50 is a cross-sectional view of the tooth assembly of Figure 3 obtained through line 50—50 with the tip as shown in Figure 16 installed on the adapter of Figure 6;
[0065] Figure 51 is the cross-sectional view of the tooth assembly of Figure 50 with the tip moved forward due to tolerances within a retention mechanism;
[0066] Figure 52 (a) - (f) are schematic illustrations of the orientation sequence of the tooth assembly of Figure 3 when an excavator implement collects a load of the work material;
[0067] Figure 53 is the cross-sectional view of the tooth assembly of Figure 50 with the section lines removed and showing a force applied to the tooth assembly when the excavator implement is in the orientation of Figure 52 (a);
[0068] Figure 54 is the cross-sectional view of the tooth assembly of Figure 53 showing a force applied to the tooth assembly when the excavator implement is in the orientation of Figure 52 (c);
[0069] Figure 55 is an enlarged view of the tooth assembly of Figure 54 illustrating the forces acting on the adapter nose and the nose cavity surfaces of the tip;
[0070] Figure 56 is the cross-sectional view of the tooth assembly of Figure 53 showing a force applied to the tooth assembly when the excavator implement is in the orientation of Figure 52 (e);
[0071] Figure 57 is a top view of an alternative configuration of a tooth assembly in accordance with the present disclosure;
[0072] Figure 58 is a front view of the tooth assembly of Figure 57;
[0073] Figure 59 is the cross-sectional view of the tooth assembly formed by the adapter of Figure 23 and the tip of Figure 26 and showing a force applied to the tooth assembly when a loader attachment digs into a pile of work material ;
[0074] Figure 60 is the cross-sectional view of the tooth assembly of Figure 59 with the tooth assembly and loader implement partially directed upwards and showing the forces applied to the tooth assembly when the loader implement is lifted through the pile of work material;
[0075] Figure 61 is an enlarged view of the tooth assembly of Figure 60 illustrating the forces acting on the nose
[0076] Figure 62 is a side view of the tooth assembly of Figure 3;
[0077] Figure 63 is a cross-sectional view of the tooth assembly of Figure 62 obtained through line 63—63;
[0078] Figure 64 is a cross-sectional view of the tooth assembly of Figure 62 obtained through line 64—64;
[0079] Figure 65 is a cross-sectional view of the tooth assembly of Figure 62 obtained through line 65—65;
[0080] Figure 66 is a cross-sectional view of the tooth assembly of Figure 62 obtained through line 66—66;
[0081] Figure 67 is a cross-sectional view of the tooth assembly of Figure 62 obtained through line 67-67;
[0082] Figure 68 is a cross-sectional view of the tooth assembly of Figure 62 obtained through line 68—68;
[0083] Figure 69 is a side view of the tooth assembly formed by the adapter of Figure 23 and the tip of Figure 26;
[0084] Figure 70 is a cross-sectional view of the tooth assembly of Figure 69 obtained through line 70-70;
[0085] Figure 71 is a cross-sectional view of the tooth assembly of Figure 69 obtained through line 71—71;
[0086] Figure 72 is a cross-sectional view of the tooth assembly of Figure 69 obtained through line 72—72;
[0087] Figure 73 is a cross-sectional view of the tooth assembly of Figure 69 obtained through line 73-73;
[0088] Figure 74 is a cross-sectional view of the tooth assembly of Figure 69 obtained through line 74—74; and
[0089] Figure 75 is a cross-sectional view of that of the adapter and the nose cavity surfaces of the tip; tooth assembly of Figure 69 obtained through line 75—75. description Detailed
[0090] Although the following text establishes a detailed description of numerous different configurations of the invention, it should be understood that the legal scope of the invention is defined by the words of the claims. The detailed description should only be interpreted as exemplary and does not describe every possible configuration of the invention. Numerous alternative configurations could be implemented, using current technology or technology developed after the filing date of this patent, which would still be within the scope of the claims defining the invention.
[0091] It should also be understood that, unless a term is expressly defined in this patent using the phrase "As used herein, the term '' is now defined as meaning ..." or a similar phrase, there is no intention to limit the meaning of such term, expressly or by implication, in addition to its simple and ordinary meaning, and such term should not be interpreted as limited in scope on the basis of any statement made in any section of this patent (except the language of the claims). where any term mentioned in the claims at the end of this patent is referred to in this patent in a manner consistent with a single meaning, this is done only for the sake of clarity so as not to confuse the reader, and it is not intended that such a claim term be limited, by implication or otherwise, to that single meaning. Finally, unless a claim element is defined by mentioning the word "means" and a function Without the reporting of any structure, it is not intended that the scope of any claim element be interpreted based on the application of 35 U.S.C. § 112, sixth paragraph.
[0092] With reference now to Figure 1, an implement for a bottom wear application is shown, such as a loader machine, in the form of a loader bucket assembly 1 that incorporates the features of the present disclosure. The loader bucket assembly 1 includes a bucket 2 which is partially shown in Figure 1. Bucket 2 is used on the loader machine to excavate the material in a known manner. The bucket assembly 10 can include a pair of opposing support arms 3 on which the corresponding corner guards 4 can be mounted. Bucket assembly 1 may further include numerous edge protector assemblies 5 interposed between tooth assemblies 1 in accordance with the present disclosure, with edge protector assemblies 5 and tooth assemblies being fixed along an edge of bucket base 18. Figure 2 illustrates an implement for a top wear application, such as a digger, in the form of a digger bucket assembly 6. Digger bucket assembly 6 includes a bucket 7 having guards for corner 4 connected on either side, and a plurality of tooth assemblies 10 attached through the base edge 18 of the bucket 7. Various configurations of the tooth assemblies are described here that can be deployed in bottom wear and top wear applications. Even when a specific tooth assembly or component configuration can be described with respect to a specific bottom wear or upper wear application, those skilled in the art will understand that tooth assemblies are not limited to a specific type of application and can be interchangeable between implements for different applications, and such interchangeability is contemplated by the inventors for tooth assemblies in accordance with the present disclosure.
[0093] Figures 3 and 4 illustrate a configuration of a 10 tooth assembly in accordance with the present disclosure that can be useful with earth moving implements, and has specific use in applications of upper wear. The tooth assembly 10 can be used on multiple types of earth penetration implements having base edges 18. The tooth assembly 10 includes an adapter 12 configured for attachment to a base edge 18 of an implement 1, 6 (Figures 1 and 2, respectively), and a tip 14 configured for attachment to adapter 12. The tooth assembly 10 also includes a retention mechanism (not shown) securing tip 14 to adapter 12. Retention mechanisms can use aspects of adapter 12 and tip 14, such as, retention openings 16 through the sides of the tip 14, but those skilled in the art will understand that many alternative retention mechanisms can be implanted in tooth assemblies 10 in accordance with the present disclosure, and tooth 10 are not limited to any (any) specific retention mechanism (s). As shown in Figure 4, once attached to the adapter 12, the tip 14 can extend outwardly from a base edge 18 of the implement 1, 6 for initial penetration with the work material (not shown). Adapter for Top Wear Applications (Figures 5-9)
[0094] An adapter configuration 12 is shown in more detail in Figures 5-9. Referring to Figure 5, adapter 12 may include a rear portion 19 having an upper strap 20 and a lower fastener 22, an intermediate portion 24 and a nose 26 disposed in the forward or forward position of adapter 12 as indicated parentheses. The upper fastener 20 and the lower fastener 22 can define a gap 28 between them as shown in Figure 6 to receive the base edge 18 of the implement 1, 6. The upper fastener 20 can have a bottom surface 30 that can be facing and be arranged close to an upper surface 32 of the base edge 18, and the lower fastener 22 may have an upper surface 34 which may face and penetrate a bottom surface 36 of the base edge 18.
[0095] The adapter 12 can be fixed in place on the base edge 18 of the implement 1, 6 by attaching the upper fastener 20 and the lower fastener 22 to the base edge 18 using any connection method or mechanism known to those skilled in the art. technical. In one configuration, fasteners 20, 22 and the base edge 18 can have corresponding openings (not shown) through which fasteners (not shown), such as screws or rivets, can be inserted to hold adapter 12 in place. Alternatively, the upper and lower fasteners 20, 22 can be welded to the upper and corresponding bottom strips 32, 36 of the base edge 18 so that the adapter 12 and the base edge 18 do not move relative to each other during use . To reduce the impact of top and bottom welds on the strength of the base edge metal 18, fasteners 20, 22 can be configured with different shapes in order to minimize the overlap of welds formed on the top surface 32 and bottom 36 of the base edge 18. As seen in Figures 7 and 8, an outer edge 38 of the upper fastener 20 may have a different shape than an outer edge 40 of the lower fastener 22 so that the upper fastener 20 can generally be more shorter and wider than the lower fastener 22. In addition to the strength maintenance benefits, the additional length of the lower fastener 22 can also provide additional wear material on the bottom surface 36 of the base edge 18 of implement 1, 6. Additionally , the upper fastener 20 can be thicker than the lower fastener 22 to provide more wear material on the upper part of the adapter 12 where a greater quantity Abrasion may occur in applications with higher wear.
[0096] Those skilled in the art will understand that other connection configurations for adapter 12 can be provided as alternatives to the upper and bottom ranges 20, 22 illustrated and described above. For example, the rear portion of adapter 12 can be provided with a single upper clamp 20 and no lower clamp 22, with the upper clamp 20 being attached to the upper surface 32 of the base edge 18. Conversely, a single lower clamp 22 and no upper fastener 20 can be provided, with the lower fastener 22 being attached to the bottom surface 36 of the base edge 18. As an additional alternative, a single central fastener can be provided on the rear portion of the adapter 12, with the central fastener being inserted into a gap at the base edge 18 of implement 1, 6. Additional alternative adapter attachment configurations will be apparent to those of skill in the art, and are contemplated by the inventor as having use in tooth assemblies in accordance with this revelation.
[0097] Returning to Figure 5, the intermediate portion 24 of the adapter 12 provides a transition between the fasteners 20, 22 and the nose 26 extending outwardly from the front end of the adapter 12. The nose 26 is configured to be received through a corresponding nose cavity 120 (Figure 16) of tip 14 as will be more fully described below. As shown in Figures 5 and 6, the nose 26 can have a bottom surface 42, an upper surface 44, opposite side surfaces 46, 48 and a front surface 50. The bottom surface 42 can be generally flat and tilted up relative to the upper surface 34 of the lower fastener 22 and, correspondingly, the bottom surface 36 of the base edge 18. An angle of inclination δ of the bottom surface 42 can be approximately 5 ° with respect to a substantially longitudinal axis "A" defined by a main base edge penetrating surface of one of the fasteners 20, 22 of the adapter 12, such as the upper surface 34 of the lower fastener 22, as shown. Depending on the implantation, the angle δ of the bottom surface 42 can be increased by an additional 1 ° - 3 ° to facilitate the removal of the adapter 12 from a mold or pattern in which the adapter 12 is manufactured, and the nose coupling 26 inside the nose cavity 120 (Figure 16) of the tip 14.
[0098] The upper surface 44 of the nose 26 can be configured to support the tip 14 during the use of the implement 1, 6, and to facilitate the retention of the tip 14 in the nose 26 when supporting the work material load. The upper surface 44 may include a first support surface 52 disposed close to the front surface 50, an intermediate inclined surface 54 extending at the rear from the first support surface 52 towards the intermediate portion 24, and the second support surface 56 located between the intermediate surface 54 and the intersection with the intermediate portion 24 of the adapter 12. Each of the surfaces 52, 54, 56 can have a generally flat configuration, but can be oriented at angles to each other. In the illustrated configuration, the first support surface 52 can be approximately parallel to the bottom surface 42, and can have an exit angle with respect to the bottom surface 42 to facilitate the removal of a mold or pattern. The second support surface 56 can also be oriented approximately parallel to the bottom surface 42 and the first support surface 52. In addition, relative to the longitudinal axis “A”, the second support surface 56 can be arranged at a higher elevation on the adapter 12 than the first support surface 52. The intermediate surface 54 extends between a rear edge 52a of the first support surface 52 and a forward edge 56a of the second support surface 56, with the distance between the intermediate surface 54 and the bottom surface 42 increasing as the intermediate surface 54 approaches the second support surface 56. In one configuration, the intermediate surface 54 can be oriented at an α angle of approximately 30 ° with respect to the bottom surface 42 of the nose 26, the first support surface 52 and the second support surface 56. The inclination of the intermediate surface 54 facilitates the insertion of the nose 26 into the cavity d and nose 120 (Figure 16) of tip 14, while the width of the intermediate surface 54 limits the contortion of tip 14, as soon as tip 14 is installed in nose 26. The first and second support surfaces 52, 56 also assist in maintaining the orientation of tip 14 on adapter 12, as will be discussed more fully below.
[0099] The side surfaces 46, 48 of the nose 26 can generally be flat and extend upwards between the bottom surface 42 and the upper surface 44. A pair of projections 58, one on each of the side surfaces 46, 48 (only one shown in Figure 6), is substantially oriented coaxially along a “B” axis. The “B” axis is approximately perpendicular to the “A” longitudinal axis. The projections 58 function as part of a retention mechanism (not shown) to hold the tip 14 in the nose 26. The projections 58 can be positioned to align with the corresponding openings 16 (Figure 3) of the tip 14. The side surfaces 46, 48 can be approximately parallel or angled inward at a longitudinal tapered angle "LTA" of approximately 3 ° with respect to the "A" axis (shown in Figure 7 with respect to a line parallel to the "A" axis for clarity) as extends forward from the middle portion 24 towards the front surface 50 of nose 26, so that nose 26 is tapered as shown in Figures 7 and 8. As best seen in the cross-sectional view of Figure 9, the lateral surfaces 46, 48 can be angled so that the distance between the side surfaces 46, 48 substantially decreases symmetrically at the vertical tapered “VTA” angles of approximately 6 ° with respect to the parallel vertical lines “VL” oriented perpendicular to the “A” and “B” axes as the side surfaces 46, 48 extend downward from the upper surface 44 towards the bottom surface 42. Configured in this way, and as shown in cross section in Figure 9, nose 26 may have a substantially cornerstone-shaped contour defined by bottom surface 42, upper surface 44 and side surfaces 44, 46, characterized by the fact that nose 26 has a greater amount of material close to upper surface 44 than close to the bottom surface 42. This contour 62 can be complementary to the contours 93, 131 (Figure 17) of the tip 14 which can provide additional wear material in the upper part of the tooth assembly 10 where a higher amount of abrasion occurs in higher wear applications, and can reduce drag as tip 14 is pushed through the work material as further discussed below.
[00100] The front surface 50 of the nose 26 can be flat as shown in Figure 6, or it can include a degree of curvature. As shown in the illustrated configuration, the front surface 50 can be generally flat, and can be angled away from the middle portion 24 as it extends upwardly from the bottom surface 42. In one configuration, the front surface 50 can extend moves forward at an angle y of approximately 15 ° with respect to a line 50a perpendicular to the bottom surface 42. With the front surface 50 angled as shown, a reference line 60 extending inward approximately perpendicular to the front surface 50 and substantially traversing the projections 58 would create the angles β1, β2, each measuring approximately 15 ° between the bottom surface 42 and the reference line 60, and also between the intermediate surface 54 of the upper surface 44 and the reference line 60. A reference line 60 can also approximately pass through a crossing point 60a of lines 60b, 60c which are extensions of the bottom surface 42 and intermediate surface 54, respectively. Using bottom surface 42 as a base reference, reference line 60 is oriented at angle β1 with respect to bottom surface 42 and passes through projections 58, intermediate surface 54 is oriented at angle β2 with respect to reference line 60, and the front surface 50 is approximately perpendicular to the reference line 60. In alternative configurations, the angle β1 can be approximately 16 ° to provide approximately 1 ° of the exit angle to facilitate the removal of a mold or pattern during manufacture. Similarly, angle α can be approximately 29 ° to provide approximately 1 ° of the exit angle. General Service Tip for Top Wear Applications (Figures 10-17)
[00101] The tip 14 of the tooth assembly 10 is shown in greater detail in Figures 10-17. Referring to Figures 10 and 11, the tip 14 may generally be wedge-shaped, and may include a rear edge 70 having an upper outer surface 72 extending forward from an upper edge 70a of the rear edge 70, and an outer bottom surface 74 extending forwards from a bottom edge 70b of the rear edge 70. The top outer surface 72 can be angled downward, and the bottom outer surface 74 can generally extend perpendicular to the edge rear 70 so that the upper outer surface 72 and the outer bottom surface 74 converge into a front edge 76 in front of the tip 14. The upper outer surface 72 may have a generally flat tip surface 14, but may have portions that can be slightly angled with respect to each other. Consequently, the upper outer surface 72 may include a rear portion 78 extending from the rear edge 70 to a first upper transition area 80 at a first "FDA" declining angle of approximately 29 ° with respect to a line perpendicular to a plane "P" defined by the rear edge 70, a front portion 82 extending forward from the transition area 80 at a second declining angle "SDA" of approximately 25 ° with respect to a line perpendicular to the plane "P", and a tip portion 84 extending from a second tip transition area 82a between the front portion 82 and the tip portion 84 at a third declining angle "TDA" of approximately 27 ° relative to a line perpendicular to the plane "FOR". The generally flat configuration of the upper outer surface 72 may allow the work material to slide up to the upper outer surface 72 and towards the base edge 18 of implement 1, 6 when the front edge 76 digs into a pile of less material work resistance to movement of the implement forward 1, 6 than can be provided if the tooth assembly had an upper outer surface with a greater amount of curvature or with one or more recesses redirecting the flow of the work material.
[00102] The outer bottom surface 74 can also be generally flat, but with an intermediate orientation change in a bottom transition area 80a on the outer bottom surface 74. Consequently, a rear portion 86 of the outer bottom surface 74 can extend from the rear edge 70 in approximately perpendicular to the "P" plane defined by the rear edge 70 towards the transition area 80a until the outer bottom surface 74 changes to a declining angle in a lower front portion 88. A front portion 88 can be oriented at an angle θ of approximately 3 ° -5 ° with respect to rear portion 86, depending on the size of tooth assembly 10, and may extend to front edge 76 at an elevation below rear portion 86 for a distance d1. By lowering the front portion 88 of the outer bottom surface 74, some of the flow and drag relief benefits discussed below that are provided by the substantially cornerstone-shaped tip contour 14 can be realized when the base edge 18 of the implement 1 , 6 move the front edge 76 forward through the work material.
[0100] Tip 14 also includes the outer side surfaces 90, 92 extending between the upper outer surface 72 and the bottom outer surface 74 on either side of the tip 14. Each of the outer side surfaces 90, 92 can have a corresponding number of retention openings 16 extending through them at a location between the rear portions 78, 86. As best seen in the bottom view of Figure 13, the front view of Figure 14, and the cross-sectional view of Figure 15 , the outer side surfaces 90, 92 can be angled so that the distance between the outer side surfaces 90, 92 decreases as the outer side surfaces 90, 92 extend downwardly from the upper outer surface 72 towards the outer surface bottom 74. Configured in this way, the tip 14 may have a substantially cornerstone-shaped contour 93 in substantial correspondence to the substantially cornerstone-shaped contour 62 described above for nose 26.
[0101] Tip 14 is provided with a higher amount of wear material close to the upper outer surface 72 where a higher amount of abrasion can occur, and a lesser amount of wear material close to the outer bottom surface 74 where less abrasion can occur. occur in higher wear applications. In this configuration, the amount of wear material and, correspondingly, the weight and cost of the tip 14, can be reduced or at least more efficiently distributed, without reducing the service life of the tooth assembly 10. The tapering of the external lateral surfaces 90, 92 from the top to the bottom to produce the substantially cornerstone-shaped contour 93 of the tip 14 can reduce the amount of drag suffered by the tip 14 as it is pulled through the work material. As the upper outer surface 74 is pulled through the work material, the work material flows over the upper outer surface 74 outward and around the tip 14 as indicated by the “FL” arrows in Figure 15, with less penetration of the outer surfaces lateral 90, 92 than if the external lateral surfaces 90, 92 were parallel and maintained in a constant width as they extend downwards from the upper external surface 74.
[0102] Figures 12-15 further illustrate that the tip 14 can be configured to taper according to the outer side surfaces 90, 92 extend from the rear edge 70 towards the front edge 76, with the outer side surfaces having an intermediate change in the tapering of the outer lateral surfaces 90, 92. The outer lateral surfaces 90, 92 can have rear portions 94, 96 extending forward from the rear edge 70 towards the front edge 76 and oriented so that the distance between the rear portions 94, 96 decreases as the rear portions 94, 96 approach a lateral transition area 97 with a lateral tapering angle "STA" of approximately 3 ° with respect to a line perpendicular to the "P" plane ”. It should be noted that the lateral tapering angle “STA” is approximately equal to the longitudinal tapering angle “LTA” of the nose 26 of adapter 12. In addition to the transition area 80, the outer lateral surfaces 90, 92 change to the front portions 98 , 100 which can be approximately parallel or converge at a shallower angle relative to a main longitudinal axis "D" defined by the tip 14 as the front portions 98, 100 progress forward to the front edge 76. The reduction in the tapering of the front portions 98 , 100 of the lateral outer surfaces 90, 92 behind the front edge 76 can preserve the wear material close to the front edge 76, the front of the tip 14 where the amount of abrasion suffered by the tip 14 is higher than in the area close to the rear edge 70 from tip 14.
[0103] As shown in Figure 13, the front portion 88 of the outer bottom surface 74 can include a relief 102. The relief 102 can extend upwardly from the outer bottom surface 74 in the tip body 14 to define a pocket “P” on tip 14. The cross-sectional view of Figure 16 illustrates the geometric configuration of a relief configuration 102. The relief 102 may include an upwardly curved portion 104 extending upwardly on the body of the tip 14 near the front edge 76. Looking at relief 102 as it extends close to front edge 76 towards back edge 70, as curved portion 104 of relief 102 extends upward, relief 102 changes into a tapered portion 106. The tapered portion 106 can extend downwards as it extends towards the rear towards the rear edge 70, and finally ends in the transition area 80 and the rear portion 86 of the outer bottom surface 74. The illustrated relief configuration 102 reduces the weight of the dot to 14, reduces the movement resistance of tip 14 through the work material, and provides a self-sharpening feature on tip 14 as will be more fully described below. However, alternative configurations for relief 102 that would provide the benefits to tip 14 will be apparent to those skilled in the art and are contemplated by the inventors to be within the scope of tooth assemblies 10 that are in accordance with the present disclosure.
[0104] Tip 14 can be configured to be received at nose 26 of adapter 12. In the rear view of tip 14 in Figure 17, a nose cavity 120 can be defined inside tip 14. The nose cavity 120 can have a complementary configuration relative to the nose 26 of the adapter 12, and may include an inner bottom surface 122, an upper inner surface 124, a pair of opposing side inner surfaces 126, 128 and a front inner surface 130. As seen from the rear, the cavity nose 120 may have a substantially cornerstone-shaped contour 131 complementary to the contour 93 of the outside of the tip 14 and contour 62 of the nose 26 of the adapter 12. The distances between the upper outer surface 72 and upper inner surface 124, and between the outer bottom surface 74 and inner bottom surface 122, can be constant in the lateral direction through the tip 14. The inner side surfaces 126, 128 can be angled to den so that the distance between the inner side surfaces 126, 128 decreases as the inner side surfaces 126, 128 extend downwardly from the upper inner surface 124 towards the inner bottom surface 122. Thus oriented, the surfaces inner sides 126, 128 mirror the outer side surfaces 90, 92 and a constant thickness is maintained between the inner side surfaces 126, 128 of the nose cavity 120 and the outer side surfaces 90, 92, respectively, outside the tip 14. A Figure 17 further illustrates that the nose cavity 120 can include the recesses 140 on the inner side surfaces 126, 128 that can be configured to receive the nose projections 58 of the adapter 12 when the nose 26 is inserted into the nose cavity 120. Thus that received, the retention mechanism (not shown) of the tooth assembly 10 can penetrate the projections 58 to secure the tip 14 on the adapter 12.
[0105] The cross-sectional view of Figure 16 illustrates the correspondence between the nose cavity 120 of the tip 14 and the nose 26 of the adapter 12 as shown in Figure 6. The inner bottom surface 122 can be generally flat and approximately perpendicular to the rear edge 70. The inner bottom surface 122 can also generally be parallel to the rear portion 86 of the outer bottom surface 74. If the bottom surface 42 of the adapter 12 has an upward exit angle, the inner bottom surface 122 of the tip 14 may have a corresponding upward slope to match the exit angle.
[0106] The upper inner surface 124 may be shaped to mate with the upper surface 44 of the nose 26, and may include a first support portion 132, an inclined intermediate portion 134 and a second support portion 136. The first and second support portions 132, 136 may be generally flat and approximately parallel to the inner bottom surface 122, but may have a slight downward slope corresponding to the orientation that can be provided on the first and second support surfaces 52, 56 of the upper surface 44 of the nose 26 to facilitate the removal of a mold or pattern. The intermediate portion 134 of the upper inner surface 124 can extend between a rear edge 132a of the first support portion 132 and a forward edge 136a of the second support portion 136, with the distance between the intermediate portion 134 and the inner bottom surface 122 increasing in a similar manner as between the intermediate surface 54 and the bottom surface 42 of the nose 26 of the adapter 12. Consistent with the relationship between the bottom surface 42 and the intermediate surface 54 of the nose 26 of the adapter 12, the intermediate portion 134 of the nose cavity 120 of the tip 12 can be oriented at an α angle of approximately 30 ° with respect to the inner bottom surface 122 and the first and second support portions 132, 136.
[0107] The front inner surface 130 of the nose cavity 120 has a shape corresponding to the front surface 50 of the nose 26, and can be flat as shown or have the shape necessary to complement the shape of the front surface 50. As shown in Figure 16, the front inner surface 130 can be angled towards the front edge 76 at an angle y of approximately 15 ° with respect to a line 130a perpendicular to the bottom inner surface 122. A reference line 138 can extend inward substantially perpendicular to the front internal surface 130 and substantially through the retention opening 16. To match the shape of the nose 26, the reference line 138 can be oriented at an angle β1 of approximately 15 ° with respect to the internal bottom surface 122 of the cavity of nose 120, and at an angle β2 of approximately 15 ° with respect to the intermediate portion 134 of the upper inner surface 124. The shapes of nose 26 and cavi nose units 120 are exemplary of a tooth assembly 10 configuration in accordance with the present disclosure. Those skilled in the art will understand that variations in relative angles and distances between the various surfaces of the nose 26 and nose cavity 120 can be varied from the configuration illustrated while still producing a nose and nose cavity having complementary shapes, and such variations are contemplated by the inventors as having use in tooth assemblies 10 in accordance with the present disclosure. Penetration Tip for Top Wear Applications (Figures 18-22)
[0108] Where tooth assemblies 10 are being used in rocky environments where a higher ability to penetrate the work material may be required, this can facilitate excavation by providing a tip having a sharper penetrating end to break the material from job. With reference to Figures 18-22, a penetration tip 150 is illustrated, in which surfaces and other elements of the tip 150 that are similar to or correspond to the elements of the tip 14 are identified by the same reference numerals, and may include a rear edge 70, an upper outer surface 72 and an outer bottom surface 74, with the upper outer surface 72 and outer outer surface 74 extending forward from the rear edge 70 and converging to a front edge 76. The outer outer surfaces 90, 92 can include the retaining openings 16 as described above. The upper outer surface 74 may have a rear portion 78 and a front portion 82, and the outer bottom surface 76 having a rear portion 86 and a front portion 88. According to tip 14, the rear portion 86 of the outer bottom surface 74 can be approximately perpendicular to the rear edge 70 and approximately parallel to the inner bottom surface 122 of the nose cavity 120 (Figures 21 and 22). The front portion 88 can be oriented at the angle θ in the range of 8 ° -10 °, and can be approximately 9 ° with respect to the rear portion 86, depending on the size of the tooth assembly 10, and can extend to the edge front 76 at an elevation below the rear portion 86 by a distance d2. The size of the nose assembly 10 can also determine whether the outer nose surface 72 includes a hook 152 extending from it that can be used to lift and position the nose 150 during installation.
[0109] The rear portions 78, 86 can extend forward from the rear edge 70 with the rear portions 94, 96 of the outer side surfaces 90, 92 being tapered and converging as the outer side surfaces 90, 92 extend from the rear edge 70 at the “STA” lateral taper angle of approximately 3 °. As the rear portions 78, 86 approach the front edge 76, the upper and bottom outer surfaces 72, 74 can change in the front portions 82, 88. The side outer surfaces 90, 92 can change in the front portions 98, 100 that they can initially be approximately parallel and then change as the front portions 98, 100 approach the front edge 76 to have a higher taper at a "PTA" penetration taper angle of approximately 20 ° with respect to a line perpendicular to the plane “P” to converge at a higher rate than the convergence within the rear portions 94, 96. Consequently, the front edge 76 can be narrower with respect to the overall width of the penetration tip 150 as best seen in Figure 19 than in tip 14 configuration as shown in Figure 12. The narrow front edge 76 of tip 150 can provide a smaller surface area to penetrate the rock work material, but increases ar the force per unit of contact area applied to the rock work material by the series of tooth assemblies 10 attached to the base edge 18 of the implement 1, 6 to break the rock work material.
[0110] In addition to narrowing the width of the front edge 76 of tip 150, the ability of tip 150 to penetrate rock work material as the wear material wears out from tip 150 over time can be further improved by reducing the overall vertical thickness of the tip 150. In the illustrated configuration, reliefs 154, 156 can be provided on either side of the front portion 82 of the upper outer surface 72, and reliefs 158, 160 can be provided on either side of the front portion 88 of the bottom outer surface 74. Reliefs 154, 156, 158, 160 can extend at the rear from the front edge 76 and tip portion 84. As the wear material wears out from the front 76 of the tip 150 in towards the rear edge 70 of the tip 14 over time, a thickness T of the surface of the remaining working material penetration tip 150 may initially increase as the material of the tip portion 84 wears out. When the wear material wears out and the work material penetrating surface reaches the reliefs 154, the thickness T can remain relatively constant with the exception of the areas of the front portions 82, 88 between reliefs 154, 156, 158, 160 where the thickness will gradually increase as the wear material continues to wear towards the rear portions 78, 86. Adapter for Bottom Wear Applications (Figures 23-25)
[0111] As mentioned above, bottom wear applications may involve different operating conditions than top wear applications and, consequently, may present different design requirements for adapters and tooth assembly tips that can result in excavation and more efficient loading of work material. For example, it may be desirable to align the bottom surfaces of the bottom wear tips parallel to the ground and parallel to the bottom surface of the implement 1 to facilitate movement along the ground to collect the work material, whereas it may be desirable for the upper wear tips, as described above, to more closely extend the shape of the implement 6 to facilitate the removal of the work material in bucket 7 of the implement 6. Different design requirements can lead to differences in the designs of both adapters and the tips of the tooth assemblies.
[0112] Figures 23-25 illustrate a configuration of an adapter 170 of the tooth assembly 10 in accordance with the present disclosure that can have specific use in an implement 1 for a bottom wear application, as well as other types of earth penetrating implements 1, 6 having the base edges 18. The surfaces and other elements of adapter 170 that are similar to or correspond to the elements of adapter 12, as described above, are identified by the same reference numerals. Referring to Figures 23 and 25, adapter 170 may include an upper fastener 20, a lower fastener 22, an intermediate portion 24 and a nose 26, with the upper fastener 20 and the lower fastener 22 defining a gap 28 between them for receive the base edge 18 of the implement 1, 6. The upper fastener 20 can have a bottom surface 30 that can be on and be arranged close to an upper surface 32 of the base edge 18, and the lower fastener 22 can have a upper surface 34 which can face and penetrate a bottom surface 36 of the base edge 18. Depending on the size of the application and, correspondingly, the tooth assembly 10, the adapter 170 may include a hook 172 extending upwards from the upper fastener 20 for attaching a lifting device (not shown) that can be used to lift and position the adapter 170 on the base edge 18 during installation. Adapter 12, as described above, can similarly be provided with hook 172, if necessary, in larger applications.
[0113] Fasteners 20, 22 of adapter 170 can be configured similar to adapter 12 with different shapes in order to minimize the overlap of welds formed on the top surface 32 and bottom surface 36 of the base edge 18. In wear applications of bottom, however, it may be desirable to make the upper fastener 20 longer than the lower fastener 22, and to make the lower fastener 22 thicker than the upper fastener 20 to provide additional wear material at the bottom of the adapter 170 where additional abrasion can occur as the adapter scrapes along the ground in bottom wear applications.
[0114] The nose 26 can also have the same general configuration as the nose 26 of the adapter 12 and be configured to be received by the corresponding nose cavities 120 of the tips which will be described more fully below. The nose 26 may have a bottom surface 42, an upper surface 44, opposite side surfaces 46, 48 and a front surface 50, with the upper surface 44 having the first and second supporting surfaces 52, 56 and intermediate surface 54 extending. between them. The lateral surfaces 46, 48 of the nose 26 can generally be flat and extend vertically between the bottom surface 42 and the upper surface 44 as best seen in Figure 25, and can be approximately parallel or angled inward as they extend from the intermediate portion 24 so that the nose 26 is tapered from the rear to the front. The side surfaces 46, 48 can be angled so that the distance between the side surfaces 46, 48 decreases as the side surfaces 46, 48 extend downwardly from the top surface 44 towards the bottom surface 42 due to the angle vertical tapering “VTA” to define a substantially cornerstone 174 shape similar to those described above. The substantially cornerstone-shaped contour 174 of adapter 170 can be complementary to the contours of the tips described below.
[0115] Regarding the nose 26 of the adapter 12 for top wear applications, the nose 26 of the adapter 170 can be oriented downwards with respect to bands 20, 22 to make the angle δ (top wear version shown in Figure 4) approximately 0 °. In this orientation, the bottom surface 42 can be generally flat and approximately parallel to the top surface 34 of the lower fastener 22 and, correspondingly, the bottom surface 36 of implement 1, 6. Furthermore, relative to the substantially longitudinal axis “A , ”The bottom surface 42 can be arranged lower on the adapter 12 d than the upper surface 34 of the lower fastener 22. The remaining relative positioning of the surfaces of the adapter 12 can be maintained. Consequently, using bottom surface 42 as a base reference, reference line 60 is oriented at angle β1 with respect to bottom surface 42 and traverses projections 58, the intermediate surface is oriented at angle β2 with respect to the reference 60, and the front surface 50 is approximately perpendicular to the reference line 60. The angles β1, β2 can each be approximately 15 °, the intermediate surface 54 can be oriented at an angle α of approximately 30 ° with respect to the bottom surface 42 of the nose 26, the upper surface 34 of the lower fastener 22, and the first and second support surfaces 52, 56, and the front surface 50 can extend forward at an angle y of approximately 15 ° with respect to a line 50a perpendicular to the bottom surface 42 or top surface 34 of the lower fastener 22. The orientation of the nose 26 of the adapter 12 with respect to the strips 20, 22 coupled to the tip configurations described below s can align the outer bottom surfaces of the tips approximately parallel to the bottom part of the implement 1, 6 and earth in order to allow the general bottom part of the tooth assembly 10 to slide along the earth surface and in the work material to load implement 1, 6. General Service Tip for Bottom Wear Applications (Figures 26-30)
[0116] In addition to adapter 170, the tips of tooth assembly 10 can be configured for improved performance in bottom wear applications. An example of a general service tip 180 for use with adapter 170 is shown in greater detail in Figures 26-30 where similar surfaces and components as previously discussed with respect to tip 14 are identified by the same reference numerals. Referring to Figures 26 and 27, the tip 180 can generally be wedge-shaped with the upper and bottom outer surfaces 72, 74 extending forward from a top and bottom edges 70a, 70b, respectively, from the rear edge 70 and converging on the front edge 76. The upper outer surface 72 can be angled downwards similar to the tip 14, and the rear portion 78 can have a first declining angle "FDA" of approximately 29 °, the front portion 82 can have a second declining angle "SDA" of approximately 25 °, and the tip portion 84 may have a third declining angle "TDA" of approximately 27 °. The generally flat configuration of the upper outer surface 72 may allow the work material to slide the upper outer surface 72 and into the machine bucket (not shown) when the front edge 76 digs into a pile of the work material. As best seen in Figure 28, the outer side surfaces 90, 92 can be angled so that the distance between the outer side surfaces 90, 92 decreases as the outer side surfaces 90, 92 extend downwardly from the upper outer surface. 72 towards the outer bottom surface 74 at vertical tapered "VTA" angles of approximately 3 ° to define a substantially cornerstone-shaped contour 188 complementary to the contour 174 described above for nose 26 of adapter 170.
[0117] The outer bottom surface 74 can also be generally flat, but with an intermediate elevation change in the transition area 80a. The rear portion 86 of the outer bottom surface 74 can extend forward approximately perpendicular to the rear edge 70 to the transition area 80 where the outer bottom surface 74 changes to the lower front portion 88. The front portion 88 can also be oriented approximately perpendicular to the rear edge 70, and can extend to the front edge 76 at an elevation below the rear portion 86 by a distance d3. When the tooth 10 assembly of an implement 1, 6 digs into the work material, a majority of the abrasion between the tip 180 and the work material occurs at the front edge 76, tip portion 84 of the upper outer surface and the front portion 88 from the outer bottom surface 74 of the tip 14. By lowering the front portion 88 of the outer bottom surface 74, additional wear material is provided in the high abrasion area to extend the service life of the tooth assembly 10.
[0118] The upper outer surface 72 of tip 180 may include a relief 182 extending through the front portion 82 and adjacent parts of the rear portion 78 and tip portion 84. As seen in Figures 28-30, relief 182 may extend upwards from the upper outer surface 72 on the tip body 180 to define a pocket on the tip 180. The cross-sectional view of Figure 30 illustrates the geometric configuration of a relief configuration 182. The relief 182 may include a portion downward curved 184 extending downwardly on the tip body 180 near the tip portion 84 and front edge 76. As the curved portion 184 extends downward, the relief 182 can rotate towards the rear edge 70 and switch to a tapered portion at the rear 186. The tapered portion 186 may extend upward as it extends towards the rear towards the rear edge 70, and finally intersects with the transition area 80 and the rear portion 78 of the surface upper outer surface 72. The illustrated relief configuration 182 reduces the weight of the stamp tip 180, reduces the resistance of movement of the tip 180 through the work material, and provides a self-sharpening feature to the tip 180 as will be described more fully below. However, alternative configurations for relief 182 providing benefits to tip 180 will be apparent to those skilled in the art and are contemplated by the inventors as having use in tooth assemblies 10 in accordance with the present disclosure.
[0119] Tip 180 can be configured to be received at nose 26 of stamp adapter 170 by providing nose cavity 120 with a complementary configuration relative to nose 26 of adapter 170 similar to nose cavity 120 of tip 14, including a cornerstone-shaped contour that is complementary to the print contour on the outside of adapter 170. The cross-sectional view of Figure 30 illustrates the correspondence between nose cavity 120 of tip 180 and nose 26 of adapter 170. The inner surface bottom 122 may be generally flat and approximately perpendicular to the rear edge 70, and may also generally be parallel to the rear portion 86 and the front portion 88 of the outer bottom surface 74 to orient the outer bottom surface 74 approximately parallel to the base edge 18 of implement 1, 6 when tip 180 is mounted on adapter 170. In other respects, the upper inner surface 124, inner lateral surfaces 126, 128 and sup front inner surface 130 may have shapes complementary to the corresponding nose surfaces 26 so that the surfaces face and engage when tip 180 is mounted on adapter 170. Abrasion Tip for Bottom Wear Applications (Figures 31-36)
[0120] Depending on the specific earthmoving environment in which stamping tooth assemblies 10 are being used, tip 180 of tooth assembly 10 as illustrated and described above in relation to Figures 26-30 can be modified as needed . For example, where the machine may be operating on work materials that are highly abrasive and can wear the tips at a much higher rate, it may be desirable to provide more wear material at the front and bottom of the tip. Figures 31-36 illustrate a tip configuration 190 having use when loading abrasive work materials. Tip 190 may have the same general wedge-shaped configuration as discussed above for tip 180 with the upper and bottom outer surfaces 72, 74 extending forward from the rear edge 70 and converging to the front edge 76 as shown in Figures 31 and 32. To reduce weight in areas of least wear and to provide a measure of self-sharpening performance, the front portion 82 of the outer tip surface 72 can be provided with reliefs 192, 194 on either side (Figures 33 and 34). Reliefs 192, 194 can extend to the rear near tip portion 84. As the wear material wears away from the front of tip 190 over time, the height of the surface of the material penetration tip 150 near the outer edges of the front portion 82 of the upper outer surface 72 may remain relatively constant. To further reduce the weight of the tip 190, an additional relief 196 can be provided on the outer bottom surface 74. The relief 196 can extend upwards into the body of the tip 190, and may be arranged further behind than the upper reliefs. 192, 194 so as not to remove much wear material from the high abrasion areas near the front edge 76.
[0121] To compensate for the superior abrasion suffered by the tip 190, the outer bottom surface 74 can be enlarged to provide additional wear material. As best seen in Figures 33 and 35, the upper portion of the tip 190 has a contour in the shape of a cornerstone similar to the tips discussed above which is complementary to the contour of the adapter nose 26. Next to the intersection of the external lateral surfaces 90, 92 with the outer bottom surface 74, the side flanges 198, 200 extend laterally from the outer side surfaces 90, 92, respectively, to enlarge the outer bottom surface 74. The side flanges 198, 200 can extend by the entire length of the tip 190 from the rear edge 70 to the front edge 76. The upper flange surfaces 202, 204 can extend forward approximately perpendicular to the rear edge 70 of the tip 190, and the outer bottom surface 74 is also a bottom flange surfaces, and can be angled down relative to the top flange surfaces 202, 204 at angle θ in the range of 1 ° -3 °, and can be approximately 2 °. More specifically, the angle θ is between the outer bottom surface 74 and a line approximately perpendicular to the rear edge 70 and approximately parallel to the upper flange surfaces 202, 204 as shown in Figures 32 and 35. With this configuration, the distance between the bottom outer surface 74 and upper flange surfaces 202, 204 may increase as side flanges 198, 200 extend forward from rear edge 70 toward front edge 76 until upper flange surfaces 202, 204 intersect the tip portion 84 of the upper outer surface 72, which in turn is converging with the bottom outer surface 74 towards the front edge 76. With this arrangement, the side flanges 198, 200 provide the additional wear material in the front and bottom of tip 190 where maximum abrasion can occur. With additional reference to Figure 36, the nose cavity 120 as illustrated is similar in configuration to the nose cavities 120, as described above, and complementary to the nose 26 of adapter 170, with the inner bottom surface 122 being approximately perpendicular to the rear edge 70. Tip Penetration for Bottom Wear Applications (Figures 37-41)
[0122] Where tooth assemblies 10 are being used in rocky environments where a higher ability to penetrate the work material may be required, it may be required to provide the tip having a sharper penetrating end to break the work material. Referring to Figures 37-41, a penetration tip 210 is illustrated with the upper outer surface 72 and the lower outer surface 74 extending forward from the rear edge 70 and converging to the front edge 76. The upper outer surface 72 may include reliefs 212, 214 on either side of the front portion 82 similar to reliefs 192, 194 described above. The rear portion 78 of the upper outer surface 72 can extend forward from the rear edge 70 with the outer lateral surfaces 90, 92 being approximately parallel or slightly tapered at a "STA" lateral tapering angle of approximately 3 ° to match the nose taper 26 of adapter 170 and converging as the outer side surfaces 90, 92 extend from the rear edge 70. As the rear portion 78 approaches the front edge 76, the upper outer surface 72 may change in the portion front 82. The outer lateral surfaces 90, 92 having an upper taper, so that the outer lateral surfaces 90, 92 can change in the front portions 98, 100 which can initially be approximately parallel to have an intermediate taper angle “ITA” of approximately 8 ° and then still change as the front portions 98, 100 approach the front edge 76 to have a top taper at an angle the penetration taper “PTA” of approximately 10 ° with respect to a line perpendicular to the “P” plane to converge at a higher rate than the convergence within the rear portion 78. Consequently, the front edge 76 may be narrower with in relation to the general width of the penetration tip 210 than in other configurations of the tip 180, 190. The narrow front edge 76 can provide a smaller surface area to penetrate the rock work material, but increase the strength per unit of contact area applied to the rock work material by the series of tooth assemblies 10 attached to the base edge 18 of the implement 1, 6 to break the rock work material.
[0123] While the wear material can be removed from the penetration tip 210 by narrowing the front edge 76, additional wear material can still be supplied to the outer bottom surface 74 by angling the outer bottom surface 74 down as it extends from the rear edge 70 as shown in Figures 40 and 41. The nose cavity 120 has the configuration described above with the inner bottom surface 122 extending approximately perpendicular to the rear edge 70 of the tip 210. The outer surface bottom 74 can be angled down relative to a line approximately parallel to the inner bottom surface 122 and approximately perpendicular to the rear edge 70 at angle θ which is in the range of 6 ° -8 °, and can be approximately 7 °. Single Tooth for Top Wear Applications (Figures 42-45)
[0124] The tooth assemblies discussed above are each comprised of an adapter and a tip attached there. In some applications, it may be desirable to attach a unitary component to implement 1, 6 to, for example, eliminate the risk of failure of the retention mechanism by attaching a tip to an adapter nose. To accommodate such deployments, the various combinations of adapters and tips set out above can be configured as unitary components providing the operational benefits described here. As an example, Figures 42-45 illustrate an integrally formed general duty tooth 270 for upper wear applications having characteristics of the adapter 12 and the tip 14. The tooth 270 can include the upper and bottom rear fasteners 272, 274, respectively, and a front tip portion 276 connected by an intermediate portion 278. The tip portion 276 may include an upper outer surface 280 and an outer bottom surface 282 extending forward from the intermediate portion 278 and converging into one. front edge 284. The upper and bottom outer surfaces 280, 282 can generally have the same geometries as the top and bottom outer surfaces 72, 74, respectively, of the tip 14, and the bottom bottom surface 282 can include a relief ( not shown). The tip portion 276 may further include the opposing lateral outer surfaces 286, 288 extending between the upper outer surface 280 and the outer bottom surface 282.
[0125] As best seen in Figure 43, the outer side surfaces 286, 288 can be angled so that the distance between the outer side surfaces 286, 288 increases as the outer side surfaces 286, 288 extend vertically from the surface bottom outer layer 282 towards the upper outer surface 280. Configured in this way, the tip portion 276 may have a similar cornerstone-shaped contour as the tip 14 to provide a greater amount of wear material close to the upper surface 280 of the that close to the bottom surface 282 where a higher amount of abrasion and wear occurs in higher wear applications. Due to geometric similarities, the tip portion 276 may wear out of the wear material over time in a similar manner as the tip 14, as illustrated in Figures 63-70 and described in the accompanying text.
[0126] In order for tooth 270 to be replaceable, tooth 270 can be fastened or similarly fixed in a removable manner to the base edge 18 of implement 1, 6, instead of being welded to the surface. Fasteners 272, 274 can be configured for such attachment to the base edge 18 by providing openings 290, 292 through fasteners 272, 274, respectively, as seen in Figures 42, 44 and 45. During assembly, openings 290, 292 can be aligned with the corresponding base edge openings 18, and the appropriate connecting hardware can be inserted to retain tooth 270 on base edge 18 of implement 1, 6. After the tip portion 276 wears out to the point requiring replacement, the connecting hardware can be disconnected and the remainder of tooth 270 can be removed and replaced with a new tooth 270. Single Tooth for Bottom Wear Applications (Figures 46-49)
[0127] It may also be desirable in bottom wear deployments, such as loader buckets, to attach a unitary component to the base edge 18 of implement 1, 6. Figures 46-49 illustrate a unitary general duty tooth formed 300 for bottom wear applications having the characteristics of adapter 170 and general service tip 180. Tooth 300 may include top and bottom rear fasteners 302, 304, respectively, and a front tip portion 306 connected by a portion intermediate 308. The tip portion 306 may include an upper outer surface 310 and an outer bottom surface 312 extending towards the intermediate portion 308 and converging at a front edge 314. The upper and bottom outer surfaces 310, 312 can generally have the same geometries as the upper and bottom outer surfaces 72, 74, respectively, of tip 180, and the upper outer surface 312 may include a relief 316. The tip portion 306 may further include the opposing outer lateral surfaces 318, 320 extending between the upper outer surface 310 and the outer bottom surface 312. As best seen in Figure 47, the outer lateral surfaces 318, 320 can be angled so that the distance between the outer side surfaces 318, 320 increases as the outer side surfaces 318, 320 extend vertically from the bottom outer surface 312 towards the upper outer surface 310. Due to geometric similarities , the tip portion 306 may wear out of the wear material over time in a similar manner as the tip 180, as illustrated in Figures 70-75 and described in the accompanying text.
[0128] In order for tooth 300 to be replaceable, tooth 300 can be fastened or similarly fixed in a removable manner to the base edge 18 of implement 1, 6, instead of being welded to the surface. Fasteners 302, 304 can be configured for such attachment to the base edge 18 by supplying openings 322, 324 through fasteners 302, 304, respectively, as seen in Figures 46, 48 and 49. During assembly, openings 322, 324 can be aligned with the corresponding openings of the base edge 18, and appropriate connecting hardware can be inserted to retain the tooth 300 on the base edge 18 of implement 1, 6. After the tip portion 306 wears out to the point of require replacement, the connecting hardware can be disconnected and the rest of tooth 300 can be removed and replaced with a new tooth 300. Industrial Applicability
[0129] Tooth assemblies 10 in accordance with the present disclosure incorporate features that can extend the life of tooth assemblies 10 and improve the efficiency of tooth assemblies 10 when penetrating the work material. As discussed above, the substantially cornerstone-shaped contour 93 of the tip 14, for example, places a greater amount of the wear material towards the upper part of the tip 14 where a greater amount of abrasion occurs in the higher wear applications. At the same time, the wear material is removed from the lower portion of the tip 14 where less abrasion occurs, thereby reducing the weight and cost of the tip 14, although, in some deployments, the upper fastener 20 may need to be thicker than dictated. abrasion to provide sufficient strength and help prevent breakage due to loading forces. In bottom wear applications, tips 180, 190, 210 can be supplied with additional wear material close to the bottom part of tips 180, 190, 210 where a higher amount of wear occurs according to tips 180, 190, 210 scrape along the earth.
[0130] The design of tooth assemblies 10 in accordance with the present disclosure can also reduce the stresses applied to the projections 58 and retention mechanism by connecting the tips 14, 150, 180, 190, 210 to the adapters 12, 170. Using the adapter 12 and tip 14 for illustration in Figures 51 and 52, based on the machining tolerances required in the retaining openings 16, the projections 58 and the corresponding components of a retaining mechanism (not shown), the tip 14 can undergo relative movement to adapter 12 and, specifically, nose 26, when using the machine. Relative movement can cause shear stresses in the components of the retention mechanism as adapter 12 and tip 14 move in opposite directions. In previous tooth assemblies, where an adapter nose may have a triangular shape in cross section, or may be more rounded in shape than the substantially cornerstone shape 62 of the nose 26, the front surfaces of the nose of the adapter and tip nose cavity can separate and allow the tip to rotate about a longitudinal axis of the tooth mount relative to the adapter. Tip contortion may cause additional shear stresses on the components of the retention mechanism.
[0131] In contrast, in tooth assemblies 10 in accordance with the present disclosure, the support surfaces 52, 56 of the adapter nose 26 can be engaged by the corresponding support portions 132, 136 that define the nose cavity 120. As shown in the cross-sectional view of Figure 50, when the tip 14 is installed in the adapter nose 26 and arranged in a maximum coupling position, the flat surfaces of the nose 26 are engaged by the corresponding flat portions of the surfaces that define the nose cavity 120 of the tip 14. Consequently, the bottom surface 42 of the adapter 12 can face and engage the inner bottom surface 122 of the tip 14, the support surfaces 52, 54, 56 of the top surface 44 of the adapter 12 can be facing and couple the corresponding portions 132, 134,136 of the upper inner surface 124 of the tip 14 and the front surface 50 of the adapter 12 can be on the front and couple the inner front surface 13 0 of the tip 14. Although not shown, the side surfaces 46, 48 of the nose 26 of the adapter 12 can face and engage the inner side surfaces 126, 128, respectively, of the nose cavity 120 of the tip 14. With the surfaces engaging , the tip 14 can remain relatively fixed with respect to the nose 26 of the adapter 12.
[0132] Due to tolerances within the retention mechanism, tip 14 may be able to slide forward on nose 26 of adapter 12 is illustrated in Figure 51. As tip 14 slides forward, some of the front surfaces of the nose 26 of adapter 12 and nose cavity 120 of tip 14 can separate and uncouple. For example, the intermediate portion 134 of the upper inner surface 124 of the tip 14 can disengage from the intermediate surface 54 of the nose 26 of the adapter 12, and the front inner surface 130 of the tip 14 can disengage from the front surface 50 of the adapter. adapter 12. Due to the distance between the side surfaces 46, 48 of the nose 26 of the adapter 12 may narrow as the nose 26 extends outwardly from the middle portion 24 of the adapter 12, as shown in Figures 7 and 8, the surfaces inner edges 126, 128 of tip 14 can separate from side surfaces 46, 48, respectively. Despite the separation of some surfaces, the coupling between the nose 26 of the adapter 12 and the nose cavity 120 of the tip 14 can be maintained over the variation in the movement of the tip 14 caused by the tolerances within the retention mechanism. As previously discussed, the bottom surface 42 and support surfaces 52, 56 of the nose 26 of the adapter 12, and the inner bottom surface 122 and support portions 132, 136 of the upper inner surface 124 of the tip 14, can generally be parallel . Consequently, the tip 14 can have a direction of movement substantially parallel to, for example, the bottom surface 42 of the nose 26 of the adapter 12, with the bottom surface 42 maintaining contact with the inner bottom surface 122 of the nose cavity 120 of the tip 14, and the support portions 132, 136 of the upper inner surface 124 of the tip 14 maintaining contact with the support surfaces 52, 56 of the adapter 12, respectively. With the flat surfaces remaining in contact, the tip 14 can be forced to substantially rotate relative to the nose 26 which could otherwise cause additional shear stresses on the components of the retention mechanism. Even when the outlet angles can be provided on the bottom surface 42, the inner bottom surface 122, the support surfaces 52, 56 and the support portions 132, 136, and a slight separation can occur between the front surfaces, the rotation of the tip 14 can be limited to an amount less than that in which the shear stresses can be applied to the components of the retention mechanism. By reducing the shear stresses applied to the retention mechanism, it is anticipated that the failure rate of the retention mechanisms and, correspondingly, the instances of tip breaking 14 before the end of their useful lives, can be reduced.
[0133] The configuration of tooth assemblies 10 according to the present disclosure can also facilitate a reduction in shear stresses on the retention mechanisms when forces are applied which may otherwise tend to cause the tips 14, 150 , 180, 190, 210, 220 (Figures 57 and 58) slide from the s26 nose of adapters 12, 170. Due to the adapter noses known in the art, they typically have a generally triangular configuration and laterally taper as the noses extend forward to From the fasteners, the forces applied during use can generally influence the tips to slide in front of the adapter noses. Such movement is resisted by the retention mechanism, thus causing shear stresses. The noses 26 of the adapters 12, 170 in accordance with the present disclosure can at least partially counteract the forces tending to cause the tips 14, 150, 180, 190, 210, 220 to slide from the adapter noses 26.
[0134] Figures 52 (a) - (f) illustrate the orientations of the tooth assembly 10 formed by the adapter 12 and the tip 14 according to the implement of a superior wear application, such as the excavator bucket assembly 6, digs into the work material and removes a load. Adapter 12 and tip 14 are used for illustration in Figures 52-56, but those skilled in the art will understand that the various combinations of adapters 12, 170 and tips 14, 150, 180, 190, 210, 220 would interact in a similar way as hereinafter described. The front edge 76 of the tooth assembly 10 initially penetrates the work material downwards in a slightly after vertical orientation as shown in Figure 52 (a). After the initial penetration, the implement 6 and tooth assemblies 10 can be rotated at the rear and removed towards the earth moving machine by expanding the machine, thus rotating through the directions shown in Figures 52 (b) - (d). During this movement through the work material, the upper outer surfaces 72 of the tips 14 form the primary penetration surface with the work material, and the tips 14 can encounter the greatest forces as they break the work material. The tips 14 also suffer the greatest abrasion on the upper outer surfaces 72. The substantially cornerstone-shaped contour 93 of the tips 14 provides additional wear material on the upper outer surfaces 72 to extend the life of the tips 14. The substantially cornerstone shape 93 also facilitates the movement of the tips 14 through the work material, as the work material will flow around the edges of the upper outer surfaces 72 with less penetration of the lateral outer taper surfaces 90, 92.
[0135] The implement 6 eventually rotates the tooth assembly 10 to the horizontal orientation shown in Figure 52 (e). At this point, the implement 6 is removed at the rear towards the machine, with the front edge 76 leading to the assembly of tooth 10 through the work material. Finally, after additional rotation of the implement 6 to the position shown in Figure 52 (f), the tooth assembly 10 can be oriented upwards, and the implement 6 can be lifted from the work material with the excavated load.
[0136] Figure 53 illustrates the assembly of tooth 10 with the generally vertical orientation of Figure 52 (a) that can occur when implement 6 is being driven downwards on a pile or surface of the work material in the direction indicated by the arrow “ M ”. The work material can resist penetration of the tooth assembly 10, resulting in the application of a vertical PV force against the front edge 76. The PV force can push the tip 14 towards the adapter 12 and in a firmer connection with the nose 26 of adapter 12 without increasing shear stresses in the retention mechanism.
[0137] In Figure 54, the tooth assembly 10 is illustrated in the position of Figure 52 (c), characterized by the fact that implement 6 can be partially supported upwards as the machine removes implement 6 at the rear and upwards to still break and collect a load of the work material as indicated by the “M” arrow. As the implement 6 is removed through the work material, a force F can be applied to the upper outer surface 72 of the tip 14. The force F can be a resultant force acting on the front portion 82 and / or the tip portion 84 of the tip 14 which can be a combination of the weight of the work material and the resistance of the work material to be displaced. The force F can be transmitted through the tip 14 to the adapter nose 26 and the upper inner surface 124 of the nose cavity 120 of the tip 14 for support, and thus yield a first resulting force force FR1 on the front support surface 52 of the adapter 12 Because the line of action of the vertical force Fv is located close to the front edge 76, the vertical force Fv tends to rotate the tip 14 in a counterclockwise direction as shown on the nose 26 of the adapter 12, with the first support surface 52 of the adapter 12 acting as the fulcrum of the rotation. The moment created by the vertical force Fv causes a second resultant force FR2 acting on the bottom surface 42 of the adapter 12 near the intermediate portion 24 of the adapter 12.
[0138] In previously known nose assemblies having continuously sloping upper surfaces of the noses, the first resulting FR1 force would tend to cause the nose to slide from the front of the nose, and thus cause additional pressure on the retention mechanism. In contrast, the orientation of the front support surface 52 of the adapter 12 with respect to the intermediate surface 54 of the adapter 12 causes the tip 14 to slide in connection with the nose 26. Figure 55 illustrates an enlarged portion of the adapter nose 26 and the tip 14, and shows the resulting forces tending to cause the tip 14 to move relative to the adapter nose 26. The first resulting force FR1 acting on the front support surface 52 of the adapter 12 and the first support portion 132 of the tip 14 has a first normal FN component acting perpendicular to the front support surface 52, and a second FP component acting parallel to the front support surface 52 and the first support portion 132. Due to the orientation of the front support surface 52 of the adapter 12 and the first portion support 132 of the tip 14 relative to the intermediate surface 54 of the adapter 12 and the intermediate portion 134 of the tip 14, the parallel component Fp or the first resultant force and FR1 tends to cause the tip 14 to slide towards the rear and in connection with the nose 26 of the adapter 12. The parallel component Fp tending to slide the tip 14 into the nose 26 reduces the shear stresses applied to the components of the retention mechanism and correspondingly reduce the incidence of failure of the retention mechanism.
[0139] Figure 56 illustrates the assembly of tooth 10 in the generally horizontal orientation shown in Figure 52 (e) as may occur when the implement 6 is being removed at the rear towards the machine in the generally horizontal direction of the "M" arrow. The work material can resist the movement of the tooth assembly 10, resulting in the application of a horizontal force FH against the front edge 76. Similar to the vertical force Fv in Figure 53, the horizontal force FH can push the tip 14 towards the adapter 12 and in a firmer connection with the nose 26 without increasing the shear stresses in the retention mechanism.
[0140] As discussed above, the substantially cornerstone-shaped contour 93 of the tip 14 can provide reduced drag soil flow when the tip 14 moves through the work material with the upper outer surface 72 leading as shown in the Figures 52 (b) - (d). However, this benefit of the substantially cornerstone-shaped contour 93 can be minimal when the tooth assembly 10 of Figure 3 is oriented as in Figures 52 (a), (e) and (f) and moving through the material of work with the front edge 76 leading. Figures 57 and 58 illustrate an alternative configuration of a tip 220 configured to reduce the drag of the soil flow as the front edge 76 leads to the tip 220 through the work material. In this configuration, similar elements are indicated by the same reference numerals as used in the discussion of tip 14. Tip 220 can be configured longitudinally with a substantially hourglass shape. The rear portions 94, 96 of the outer side surfaces 90, 92 can taper inward as they extend forward from the rear edge 70 so that the distance between the rear portions 94, 96 decreases as the rear portions 94, 96 approach the side transition area 97. In addition to the transition area 97, the front portions 98, 100 may diverge as the front portions 98, 100 progress forward to a maximum width close to the front edge 76. The tapering of the front portions 98, 100 of the lateral outer surfaces 90, 92 behind the front edge 76 can reduce the amount of drag suffered by the tip 220 as it passes through the work material. As the front edge 76 digs into the work material, the work material on the sides flows outward and around the tip 220 as indicated by the “FL” arrows in Figure 57, with less penetration of the outer side surfaces 90, 92 than the front portions 98, 100 were parallel and kept at a constant width as the front portions 98, 100 extend towards the rear edge 70 from the front edge 76.
[0141] The discussion of Figures 52-56 above establishes the performance of the components of tooth assemblies 10 in accordance with the present disclosure during the variation of the movement of an implement 6 in a superior wear application. The adapter nose 26 in accordance with the present disclosure can similarly counterbalance forces by tending to make the tips 14, 150, 180, 190, 210, 220 slide from the adapter noses 26 of the adapters 12, 170 in application bottom wear, such as during the loading sequence shown in Figures 59- 61. Figure 59 illustrates the tooth 10 assembly formed by adapter 170 and tip 180 with a generally horizontal orientation as may occur when the machine is being driven in towards a pile of work material as indicated by the “M” arrow. The work material can resist the penetration of the tooth assembly 10 into the stack, resulting in the application of a horizontal force FH against the front edge 76. The force FH can push the tip 14 towards the adapter 12 and in a firmer connection with the nose 26 without increasing shear stresses in the retention mechanism.
[0142] In Figure 60, tooth assembly 10 is illustrated in a position where implement 1 can be partially supported upwards as the machine starts to lift a load of work material out of the pile in the direction indicated by the arrow “ M ”. As implement 1 is lifted from the work material, a vertical PV force can be applied to the upper outer surface 72 of the tip 180. The vertical PV force can be a resultant force acting on the front portion 82 and / or the tip portion 84 that can be a combination of the weight of the work material and the resistance of the work material to be displaced from the pile. The PV vertical force can be transmitted through the tip 180 to the adapter nose 26 for support, and thus yielding a first resulting force FR1 on the front support surface 52 of the adapter nose 26. Because the line of action of the PV vertical force is located near the front edge 76, the vertical force FV tends to rotate the tip 180 in a counterclockwise direction as shown on the nose 26 of the adapter 170, with the first support surface 52 of the nose 26 acting as the pivot of rotation. The moment created by the vertical force FV causes a second resultant force FR2 acting on the bottom surface 42 close to the intermediate portion 24 of the adapter 170. In previously known tip assemblies having continuously inclined upper surfaces of the noses, the first resultant force FR1 would tend to make with the tip sliding from the front of the nose, and thus causes additional pressure on the retention mechanism.
[0143] In contrast, the orientation of the front support surface 52 with respect to the intermediate surface 54 causes the tip 180 to slide in connection with the nose 26. Figure 61 illustrates an enlarged portion of the nose 26 of the adapter 170 and the tip 180, and shows the resulting forces tending to cause the tip 180 to move relative to the nose 26. The first resulting force FR1 acting on the front support surface 52 of adapter 170 and the first support portion 132 of tip 180 has a first component normal FN acting perpendicular to the front support surface 52, and a second FP component acting parallel to the front support surface 52 and first support portion 132. Due to the orientation of the front support surface 52 and first support portion 132 relative to the intermediate surface 54 of adapter 170 and the intermediate portion 134 of tip 180, the parallel component FP of the first resultant force FR1 tends to cause tip 180 to slide on the straight guard and in connection with the nose 26 of the adapter 170. The parallel component FP tending to slide the tip 180 into the nose 26 reduces the shear stresses applied to the components of the retention mechanism and, correspondingly, reduces the incidence of failure of the mechanism retention.
[0144] In addition to the retention benefits of nose configuration 26 of adapters 12, 170 and nose cavities 120 of tips 14, 150, 180, 190, 210, 220 as discussed above, tooth assemblies 10 can provide benefits during use in top and bottom wear applications. The geometric configurations of the tips 14, 150, 190 of the tooth assemblies 10 in accordance with the present disclosure can provide improved efficiency when penetrating the work material in the higher wear applications over the service life of the tips 14, 150, 190 as compared to the tips previously known in the art. As wear material is worn from the front of tips 14, 150, 180, 190, 210, reliefs 102, 158, 160, 196 can provide self-sharpening capabilities to tips 14, 150, 190 providing improved penetration where previously known tips can become blunt and shaped more like a fist than a cutting tool. Using tip 14 as an example for the purpose of illustrating the self-sharpening feature, the front view of tip 14 in Figure 14 shows the front edge 76 forming a main cutting surface that initially enters the work material. Figure 62 is a reproduction of Figure 4 showing the tooth 10 assembly formed by the adapter 12 and tip 14, and the cross-sectional views shown in Figures 63-68 illustrate changes in the cutting surface geometry as the wear material wears from the front of the tip 14. Figure 63 shows a cross-sectional view of the tooth assembly 10 in Figure 62 with the section obtained between the front edge 76 and the relief 102. After abrasion wear the tip 14 to that At this point, a cutting surface 330 of tip 14 now has a cross-sectional area engaging the work material that is less sharp than the front edge 76 as the machine digs implement 1 into the work material. It will be apparent to those skilled in the art that abrasion of penetration with the work material can cause the outer edges of the cutting surface 330 to become rounded, and for portions 78, 82, 84 of the upper outer surface 72 for wear as indicated by the cross hatched area 330a and thus reduce the thickness of the cutting surface 330.
[0145] The tip 14 wear material continues to wear towards the rear towards relief 102. Figure 64 illustrates a cross section of the tooth assembly 10 in a position where the front of the tip 14 may have worn out on the portion of the tip 14 providing relief 102 to form a cutting surface 332. At that point, tip 14 may have worn through the curved portion 104 of relief 102 so that cutting surface 332 includes an intermediate area of reduced thickness. The reduced thickness area can cause the cutting surface 332 to have a slight inverted U-shape. The wear material removed from the cutting surface 332 by relief 102 reduces the cross-sectional area of the main cutting surface 332 from tip 14 to “sharpen” tip 14 and, correspondingly, reduce the resistance suffered according to tips 14 of the implement 1 enter the work material. The wear material continues to wear from portions 78, 82, 84 as indicated in the cross hatched area 332a to further reduce the thickness of the tip 14. At the same time, the wear material wears away from the front portions 98, 100 of the outer lateral surfaces 90, 92, respectively, to reduce the width in front of the tip 14. The tapered portion 106 of the relief 102 allows the work material to flow through the relief surface 102 with less resistance than if the rear portions of the relief. relief 102 were flat or rounded and in front more directly towards the work material. The tapering of the tapered portion 106 reduces forces acting normal to the surface which can resist the flow of the work material and penetration of the tip 14 into the work material.
[0146] Figures 75 and 76 illustrate the additional iterations of the cutting surfaces 334, 336, respectively, as the wear material continues to wear from the front end of the tip 14 and from the portions 78, 82 of the surface upper outer 72, and the front portions 98, 100 of the outer lateral surfaces 90, 92, as denoted by the cross hatched areas 334a, 336a. Due to the shape of the relief 102, the portions of the cutting surfaces 334, 336 cut by the relief 102 may initially increase as the leading edge of the tip 14 progresses behind the cutting surface 334, and eventually decreases as wear continues to progress to the surface cutting edge 336. Eventually, the wear material wears out from the front of the tip 14 towards the limits at the rear of the relief 102.
[0147] As shown in Figure 67, a cutting surface 338 closely approaches the cross-sectional area of tip 14 near the end at the rear of relief 102, thus creating a relatively large surface area for attempting material penetration. of work. The large surface area can be partially reduced by the wear indicated by the cross hatched area 338a. Tip 14 starts to work less efficiently when cutting the work material as tip 14 near the end of its useful life. Wearing of tip 14 towards relief end 102 can provide a visual indication for tip replacement 14. Continued use of tip 14 causes further erosion of the wear material in front of tip 14, and can ultimately lead to breakage of the nose cavity 120 on a cut surface 340 as shown in Figure 68. Wear progressing inwardly from the outer surfaces 72, 74, 90, 92, as indicated by the cross hatched area 340a, may eventually cause additional cavity breaks nose 120 with continuous use of tooth assembly 10. At that point, nose 26 of adapter 12 may be exposed to the work material, and may start to wear, possibly to the point where adapter 12 must also be removed from base edge 18 of implement 1 and replaced.
[0148] The geometric configurations of the tips 150, 180, 190, 210 can also provide improved efficiency when penetrating the work material over the service life of the tips 150, 180, 190, 210. The reliefs 154, 156, 182, 192 , 194, 212, 214 on the upper outer surfaces 72 can provide self-sharpening capabilities on the tips 150, 180, 190, 210 providing improved penetration as the wear material is worn from the front of the tip. As an example, Figure 69 illustrates the tooth assembly 10 that can be formed by the adapter 170 and general service tip 180, and the cross-sectional views shown in Figures 70-75 illustrate the changes in the cutting surface geometry as per the wear material wears out from the front of tip 180. Figure 71 shows a cross-sectional view of tooth assembly 10 in Figure 69 with the section obtained between the front edge 76 and relief 182. After abrasion wear out the tip 180 up to that point, a cutting surface 350 from tip 180 now has a cross-sectional area engaging the work material as the machine moves forward which is less sharp than the front edge 76. It will be apparent to those skilled in technique that abrasion of penetration with the work material can cause the outer edges of the cutting surface 350 to become rounded, and for the front portion 88 of the outer bottom surface 74 to wear out as indicated by the cross hatched area 350a and thus reduce the thickness of the cutting surface 350.
[0149] The wear material of tip 180 continues to wear towards the rear towards relief 182. Figure 71 illustrates a cross section of tooth assembly 10 in a position where the front of tip 180 may have worn out in the portion of tip 180 providing relief 182 to form a cut surface 352. At that point, tip 180 may have worn through the curved portion 184 of relief 182 so that cut surface 352 includes an intermediate area of reduced thickness. The reduced thickness area can cause the cutting surface 352 to have a light U-shape. The wear material removed from the cutting surface 352 by relief 182 reduces the cross-sectional area of the main cutting surface 352 of the tip 180 to "sharpen" the tip 180 and, correspondingly, reduces the resistance suffered according to the tips 180 of implement 1 enter the work material. The wear material continues to wear from the front portion 88 of the outer bottom surface 76 to reduce the thickness of the cut surface 352, and the wear material wears away from the front portions 98, 100 of the outer surfaces sides 90, 92, respectively, to reduce the width in front of the tip 180, as indicated in the cross hatched area 352a. The tapered portion 186 of the relief 182 allows the work material to flow through the relief 182 with less resistance than if the rear portions of the relief 182 were flat or rounded and facing more directly towards the work material. The tapering of the tapered portion 186 reduces forces acting normal to surfaces that can resist the flow of the work material and the penetration of the tip 180 into the work material.
[0150] Figures 72 and 73 illustrate additional iterations of the cutting surfaces 354, 356, respectively, as the wear material continues to wear from the front edge 76 of the tip 180 and from the front portion 88 of the outer surface bottom 74 of tip 180 and front portions 98, 100 of external side surfaces 90, 92 of tip 180, as denoted by the cross hatched areas 354a, 356a. Due to the shape of the relief 182, the portions of the cutting surfaces 354, 356 notched by the relief 182 may initially increase as the leading edge of the tip 180 progresses behind the cutting surface 354, and eventually decreases as the wear continues to progress to the surface cutting edge 356. Eventually, the wear material wears at the edges at the rear of the relief 182.
[0151] As shown in Figure 7, a cutting surface 358 closely approaches the cross-sectional area of the tip 180 behind the relief 182, thus creating a relatively large surface area for attempting to penetrate the work material. The large surface area can be partially reduced by wear indicated by the cross hatched area 358a. Tips 180 start to work less efficiently when cutting the work material as tips 180 approach the end of their useful life. Wearing the tips 180 in addition to the relief 182 can provide a visual indication for replacing the tips 180. Continued use of the tips 180 causes additional erosion of the wear material in front of the tips 180, and can ultimately lead to a break in the nose cavity 120 on a 360 cut surface as shown in Figure 75. Wear progressing inwardly from the outer surfaces 72, 74, 90, 92 as indicated by the cross hatched area 360a can eventually cause additional breaks in the nose cavity 120 with continued use of tooth assembly 10. At that point, the nose 26 of adapter 170 may be exposed to the work material, and may start to wear, possibly to the point where adapter 170 must also be removed from the base edge 18 of implement 1 and replaced.
[0152] While the preceding text provides a detailed description of numerous different configurations of the invention, it should be understood that the legal scope of the invention is defined by the words of the claims set out at the end of this patent. The detailed description should only be interpreted as exemplary and does not describe every possible configuration of the invention, since describing each possible configuration would be impractical, not impossible. Numerous alternative configurations could be implemented, using current technology or technology developed after the filing date of this patent, which would still be within the scope of the claims defining the invention.

权利要求:
Claims (11)
[0001]
1. Ground penetration tip, from an arrangement of teeth (10) to an edge of the base (18) of an attachment of soil penetration (1, 6), characterized by the fact that the arrangement of teeth includes an adapter (12, 170) configured to be attached to the base edge (18) of the ground penetrating implement (1, 6) and having an adapter nose that extends forward (26), with the ground penetrating tip (14 , 150, 180, 190, 210) comprises: - a rear edge (70); - an upper outer surface (72); - a lower outer surface (74), where the upper outer surface (72) and the lower outer surface (74) extend forward from the rear edge (70) and converge to a front edge (76); - opposing external side surfaces (90, 92) extending downwardly from the upper external surface (72) to the lower external surface (74); - an internal surface (122, 124, 126, 128) that extends into the ground penetration tip from the rear edge (70) and which defines a nose cavity (120) within the soil penetration tip ( 14, 150, 180, 190, 210) having a complementary shape for the adapter nose (26) of the adapter (12, 170) to receive the adapter nose (26) therein, the inner surface including: - a front inner surface (130); - an inner bottom surface (122) that is flat and extends internally from the rear edge (70) of the ground penetration tip (14, 150, 190, 210), the inner bottom edge is oriented perpendicular to the edge posterior (70) and perpendicular to a posterior portion of the lower external surface (74); and - an upper inner surface (124) having a first support portion (132) close to the front inner surface (130) and a second support portion (136) close to the rear edge (70) of the ground penetration tip (14 , 150, 190, 210), the distance between the first support portion (132) and the second support portion (136) is less than the distance between the second support portion (136) and the inner bottom surface ( 122), the first support portion (132) and the second support portion (136), of the inner surface (122, 124, 126, 128) being flat and parallel to the inner bottom surface (122); and - a relief (102) extending into the tip of the ground penetration (14,150,190,210) from the lower external surface (74), and which is located near the front edge (76).
[0002]
2. Ground penetration tip according to claim 1, characterized in that the lower external surface (74) includes a relief (102) extending into the soil penetration tip (14,150,190,210) from the lower surface outer (74), and being disposed near the front edge (76), the relief (102) being disposed in front of the tip cavity (120).
[0003]
3. Ground penetration tip according to claim 2, characterized in that the relief (102) comprises a frontal portion (104) extending upwards from the corresponding lower external surface (74) of the penetration tip in the ground (14, 150, 180, 190, 210), and a tapered posterior portion (106) extending from an upper end of the front portion (104) to a point of intersection with the lower outer surface (74) at a rear end of the relief (102).
[0004]
4. Ground penetration tip according to claim 3, characterized by the fact that the front portion (104) of the relief (102) is curved.
[0005]
5. Ground penetration tip according to claim 4, characterized in that the lower outer surface (74) comprises a posterior portion (86) close to the posterior edge (70) and a frontal portion (88) close to the front edge (76) and having the relief (102) located there, and where the posterior portion (86) of the lower external surface (74) is perpendicular to the posterior border (70) and the frontal portion (88) of the lower external surface (74) it is angled downwards in relation to the posterior portion (86) of the lower external surface (74).
[0006]
6. Ground penetration tip according to claim 5, characterized by the fact that each of the external lateral surfaces (90, 92) of the soil penetration tip (14, 150, 180, 190, 210) comprises a posterior portion (94, 96) close to the rear edge (70) and a front portion (98, 100) close to the front edge (76), where the posterior portions (94, 96) of the outer side surfaces (90, 92) taper inward from a maximum width close to the rear edge (70) to a minimum width in a transition area, and where the front portions (98, 100) of the outer side surfaces (90, 92) taper out from the minimum width in the transition area to the widest width near the front edge (76).
[0007]
7. Ground penetration tip according to claim 6, characterized in that the upper outer surface (72) of the soil penetration tip (14, 150, 180, 190, 210) comprises a posterior portion (78) close the rear edge (70) and a front portion (82) close to the front edge (76), and the front portion (82) of the upper outer surface (72) is tapered from the maximum width close to the back portion (78 ) from the upper outer surface (72) to a minimum width close to the front edge (76).
[0008]
8. Ground penetration tip according to any one of claims 1 to 7, characterized in that the outer side surfaces (90, 92) are tapered so that a distance between the outer side surfaces (90, 92) decreases as the outer lateral surfaces (90, 92) extend downwardly from the upper surface (72) towards the lower external surface (74).
[0009]
9. Ground penetration tip according to claim 1, characterized by the fact that the intermediate portion (134) of the upper inner surface (124) is oriented at an angle of 30 ° with respect to the first support portion (132) and to the second support portion (136) of the upper inner surface (124).
[0010]
10. Ground penetration tip according to any one of claims 1 to 9, characterized in that the internal surface (122, 124, 126, 128) also includes internal lateral surfaces (126, 128) between the upper internal surface (124) and the inner bottom surface (122), the distance between the inner surfaces (126, 128) being greater on the upper inner surface (124) than on the inner bottom surface (122).
[0011]
11. Ground penetration tip according to any one of claims 1 to 10, characterized in that the internal front surface (130) is flat and is oriented at an angle of 15 ° to a line perpendicular to the surface internal bottom (122).

类似技术:

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公开号 | 公开日 | 专利标题

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BR112014008337B1|2020-12-22|ground penetration tip

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BR112014008335B1|2021-02-17|ground penetration tip

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BR112014008281B1|2021-01-19|earth penetration tip

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BR112014008639B1|2021-05-11|soil penetration tip and soil penetration tooth arrangement

同族专利:

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公开号 | 公开日

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CN104364450A|2015-02-18|

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RU2014118607A|2015-11-20|

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ZA201402764B|2015-11-25|

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US9057177B2|2015-06-16|

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AU2012318447A1|2014-04-10|

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MX2014004174A|2014-07-28|

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CA2851417C|2019-03-26|

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WO2013052826A1|2013-04-11|

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US20150233095A1|2015-08-20|

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EP2764167B1|2016-11-16|

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BR112014008337A2|2017-04-18|

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AU2012318447B2|2016-09-29|

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US20130086826A1|2013-04-11|

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JP6110388B2|2017-04-05|

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EP2764167A1|2014-08-13|

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CL2014000854A1|2014-08-29|

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RU2598505C2|2016-09-27|

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US9624651B2|2017-04-18|

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JP2014531546A|2014-11-27|

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MX343765B|2016-11-18|

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CA2851417A1|2013-04-11|

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法律状态:
2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

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2019-11-26| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|

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2020-11-03| B09A| Decision: intention to grant|

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2020-12-22| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 05/10/2012, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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US201161545110P| true| 2011-10-08|2011-10-08|

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US61/545,110|2011-10-08|

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US13/644,493|US9057177B2|2011-10-08|2012-10-04|Implement tooth assembly with tip and adapter|

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US13/644,493|2012-10-04|

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PCT/US2012/058997|WO2013052826A1|2011-10-08|2012-10-05|Ground engaging implement tooth assembly with tip and adapter|

---