• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    mechanical fastening of the coupling tool with the ground. the present invention is related to a connection unit (30) for mounting a ground engaging tool (get) for use in earth moving equipment, said unit including a body (32) within which a resilient device (34), a force applying element (36), a locking element (38) with an o-ring sealing ring (40) to be received in an annular channel (42) around the element. of locking element, a locking element stop (44) received in a hole (46) in the locking element, a body stop (48) to be fitted into an opening under the body. the locking ring stop (44) prevents the force applying element from rotating within the body when the bolt is turned and advances the piston through threaded engagement. embodiments of the present invention do not require a spacer (50).
    公开号:BR112015004689B1
    申请号:R112015004689-4
    申请日:2013-09-04
    公开日:2021-06-29
    发明作者:John Dallard Bradley；Marten Karlsson Bjorn；Edward Smeaton Benjamin；Rogozinski Kamil
    申请人:Sandvik Intellectual Property Ab；
    IPC主号:
    专利说明:

    Field of Invention
    [001] The present invention is related to the mechanical connection of wear parts to fundamental structures. The present invention was produced in connection with the connection of ground hitch tools to earth moving equipment buckets. Background of the Invention
    [002] Ground Engaging Tools (GET) for earth moving equipment, such as equipment used in mining operations, operate in highly abrasive environments, are subjected to high impact forces and therefore , to wear, or become damaged through use. Ground Engagement (GET) tools, as well as grapples used on the flap or front edges of an earthmoving equipment bucket, therefore require regular replacement.
    [003] Traditionally, ground engaging tools (GET) are welded to the bucket flaps. When the ground engaging tool reaches the end of its useful life, it can be cut from the bucket and a new GET welded in place.
    [004] It should be noted that these cutting and rewelding operations are complex, time-consuming and relatively expensive. In addition, these operations must generally be done in a workshop to ensure that cutting and welding are done correctly, which requires the bucket to be transported outside the earthmoving equipment.
    [005] Several methods of mechanical fixation have been proposed, in an attempt to solve these problems. Many of these methods involve the use of screws and similar fasteners, inserted into the bucket lip. In general, these devices have proven to be of limited use. Inserting a bolt or similar element into a bucket lip can cause undesirable stress concentrations within the lip, resulting in the formation of cracks in the bucket lip. Even when this is avoided, the high forces to which the ground engaging tools are exposed have a tendency to deform the connecting bolts, thus making their subsequent extraction with the use of power tools difficult. In fact, in some cases the deformation can be so intense that the ground engaging tool will have to be cut out, completely negating any mechanical connection advantage.
    [006] In response to these aspects, the Applicant has outlined a number of mechanical connection devices that overcome these problems. Examples of devices provided by the Applicant are detailed in US Patent Nos. 7,219,454 and 7,472,503, and in Patent Application No. 13/133,213 (also published as PCT International Patent Application, No. WO 2010/065990), the contents of all of which are incorporated herein by reference.
    [007] These connection devices involve the use of a cover that is disposed over an ear or boss of a digging bucket, a locking device located between the cover and the boss, and the application of an external compressive force to maintain the relative position of the deck, the locking device and the boss.
    [008] Although these connecting devices have proven to be much less susceptible to deformation than previous mechanical connectors, however, there have been occasions where the connecting device has experienced one or more problems. Sometimes failure of the ground tool or connecting device can occur when GET is in use, due to the load being applied is greater than the device can handle. The number of individual components that make up the connecting device can make engaging/reseating the Ground Engagement Tool (GET) a time-consuming action. Other times, when it is necessary to remove the (GET), the connecting device is problematic to undo the release of the ground engaging tool (GET) from the bucket, or even if the connecting device has been released, the attachment tool with soil it is not easily removed from the bucket lip, usually due to dirt, and/or deformation of the connecting device, and/or impediment to removal of the GET.
    [009] The present invention aims to provide a means by which the removal and, preferably, the application of a ground engagement tool (GET) to earth moving equipment can be substantially improved. Invention Summary
    [0010] According to a first aspect of the present invention, there is provided a connecting device for releasably attaching a ground engaging tool (GET) to earth moving equipment, the connecting device having a body, a force applying element and a locking element, the locking element being arranged to advance relative to the body so that the connecting device holds the ground engaging tool in the earth moving equipment, and to retract with respect to the body, upon release of the connecting device, the locking element including a first portion arranged to positively engage with an element in the earth moving equipment when the locking element retracts, during release of the connecting device .
    [0011] A further aspect of the present invention provides a connecting device for attaching a ground engagement tool (GET) to earth moving equipment, the connecting device including a body unit, a force application element and a locking element, the locking element having a first portion, the body unit arranged to be received within a recess in the ground engaging tool (GET), wherein, when in use, force is applied by the force applying element causes the force receiving element to advance relative to the body and thereby engage the device with a portion of the earth moving equipment to apply forces to the GET and the portion of the earth moving equipment to connect the ground engaging tool (GET) to the earth moving equipment, and the locking element further includes means for applying a release force to the portion of the earth moving equipment. ground, when the connection device is released.
    [0012] According to another aspect of the present invention, there is provided a unitary connection device for attaching a ground engaging tool (GET) to earth moving equipment, the device having a body, an application element. force and a force-receiving element, wherein the application of force by the force-applying element causes the force-receiving element to advance relative to the body and thereby engage the device with the ground engagement tool (GET ) with a portion of the earthmoving equipment in order to retain the GET in the earthmoving equipment.
    [0013] Thus, advantageously, the connecting device is able to positively retract to release the ground engaging tool (GET) from locking engagement with the earth moving equipment. Known means of connecting a ground engaging tool (GET) to, for example, a bucket of earthmoving equipment may use a screw-type mechanical clamping mechanism, but when the time comes to release this mechanism for removal and replacement of the GET, the screw can be removed with difficulty and the clamping mechanism does not retract, so a locking device is used in order to positively release the clamping mechanism to allow removal of the engagement tool with the ground (GET) . Indication of friction, dirt or corrosion within the mechanism may cause the clamping mechanism to not allow retraction.
    [0014] The force receiving element may incorporate or be the locking element. The portion of earthmoving equipment may include an adaptor, ear or boss (hereafter these elements will be collectively referred to as a boss for ease of understanding) disposed on or adjacent to a flap of a bucket of the moving equipment of land.
    [0015] When in use, according to one or more embodiments, an application of force by the force applying element to the locking element causes the locking element to extend from a first side of the body.
    [0016] The first portion of the locking element can be provided by a channel or slot in said locking element, which can produce a projection (or flap) on the locking element.
    [0017] The projection of the locking element can engage during release of the connecting device with a corresponding portion in a boss fixed to the earth moving equipment. The boss portion can be a projection that extends from the boss or a surface of the boss.
    [0018] The locking element may include a stop device arranged to restrict or prevent rotation of the locking element during locking and/or releasing the connecting device. The stop device may be provided with one or more stop projections from the locking element which engage with the body to prevent rotation of the locking element relative to the body. The stop device may include a pin or key which protrudes from the locking element.
    [0019] The force applying element may include a threaded element such as a screw. The locking element may include a corresponding threaded element for threaded engagement with the thread of the threaded force applying element. The locking element may include a nut, which may be externally cylindrical and internally threaded. However, other shapes are considered to suit the scope of the present patent application, such as a locking element in the form of a quadrilateral, hexagonal or octagonal prism (which, therefore, cannot require a stop device). In this way, the locking element can be advanced by rotating the threaded force-applying element.
    [0020] The force applying element may include a stop device, which may further include a recess or collar. The recess or collar may be provided along a portion of an axis of the force applying element. This force-applying element stop device can engage with a stop portion of the body. This stop portion of the body can be integral with the body or it can be an additional stop device, fixed or fitted, such as an insert, a press or interference fit wrench or a grub screw, or a press fit wrench. components, which are designed to act as a stop for the force-applying element. Preferably, the body stop device may include a wafer within an opening through the body, the wafer protruding into a travel path of part of the force applying element to thereby interrupt further travel of the element. application of force in that direction.
    [0021] According to a third aspect of the present invention, there is provided a system for fastening a ground engagement tool (GET), for connecting the GET to a bucket flap, the bucket flap having a boss on the same, the ground engaging tool having a recess that receives the boss in use, a connecting device being disposed, in use, between the boss and the GET, the connecting device having a body, an applying element. force and a locking element, including a connecting device release portion, wherein the application of force by the force applying element causes the locking element to move relative to the body and engage with the boss, and upon releasing the connecting device, the locking element reverses its course, and the releasing portion of the connecting device applies a force to assist in releasing the ground engagement tool (GET) from the locking engagement with the bucket flap .
    [0022] Preferably, the force applying element is slidably received in the body. The force applying element may include a portion which projects through an opening in the body when received therein. This projection portion may include a transmission head, with means for receiving an actuator for operating the connecting device. The drive head may include an external hex head or an internal socket, such as a hex drive socket for a pneumatically operated actuator (eg, an impact drill).
    [0023] It is preferred that the force applying element is substantially axially aligned with the force receiving element or locking element.
    [0024] The force receiving element and/or the force applying element may include a piston and may be substantially cylindrical in shape. In a preferred embodiment, the force-receiving element or locking element has a bevelled outer edge of an advancing part thereof. This allows a small degree of plastic deformation of the force receiving element/locking element to occur without significantly affecting the operation of the connecting device.
    [0025] The force receiving element/locking element may have a hardness less than 90% of the hardness of the force applying element. It is preferred that the hardness ratio of the force receiving element to the force applying element is between 0.7 and 0.9. Testing suggests that a hardness ratio of about 0.8 provides an effective result.
    [0026] One or more resilient elements may be provided between part of the force applying element and the body, and/or between part of the force applying element and part of the force receiving element/locking element. The resilient element(s) may include Belville washers or Nordlock washers, which may have one or more interconnecting surfaces to prevent or restrict the counter rotation of the force applying element or the load element. locking, depending on where the resilient elements are located within the body of the connecting device.
    [0027] The connecting device can be provided in the form of a 'cassette' or 'cartridge', in the sense that the connecting device can be provided as a pre-assembled device, prior to mounting within the recess of the coupling tool with the ground (GET). The body can form an external housing for the force applying element and the locking element, and the entire connecting device can then be inserted as a cassette or cartridge into the recess of the loosely mounted ground engaging tool. on the bucket flap. The force application element can then be actuated to clamp the Ground Engagement (GET) tool into the bucket lip and thereby lock the GET in place.
    [0028] At least one spacer element may be provided between the body and a part of the ground engaging tool (GET). The spacer element can be inserted into the recess in the ground engaging tool (GET), either before or after the connecting device is inserted there. The connecting device can be provided as an assembled component installation, which can be provided pre-assembled for easy placement into the recess in the ground engagement tool (GET), or which can be assembled on site at the time of assembly of the GET into the hopper flap and then inserted into the recess. The spacer element may include a plate, preferably with an opening therethrough. The head of the force application element may protrude into or through the opening in the spacer element when mounted in place with the Ground Engagement Tool (GET) . This can allow access for the transmission device on the force applying element, such as through a pneumatically actuated actuator, for example an impact drill, to tighten and release the connecting device.
    [0029] The body may include a recessed end to allow the first portion of the locking element with the channel or recess, to protrude from an end of the body, to engage with the boss, at least when releasing the device. connection. The recess can be a step or an opening at one end of the body.
    [0030] The connecting device may include a force applying portion to apply a release force to the ground engagement tool (GET) when in operation, preferably when in the loosening stage of the connecting device.
    [0031] The force application portion can be provided by a projection on the body of the connecting device.
    [0032] Another embodiment of the present invention provides a method of releasing a ground engagement tool (GET) from earth moving equipment, the method including releasing the connecting device releasably secured to the engagement tool with the ground (GET) of the earth moving equipment, where, during release, the connecting device positively retracts together with a locking element and the body, to contract the connecting device.
    [0033] The locking element may apply a force to a portion of the earth moving equipment during retraction. Force can be applied to a boss over a lip of a bucket of earthmoving equipment.
    [0034] During the loosening stage of the connecting device, the connecting device may apply a removal force to the ground engaging tool (GET).
    [0035] A further aspect of the present invention provides a mounting for a ground engaging tool (GET) to a bucket of earth moving equipment, the bucket including a beveled edge, the bevel including a surface with a boss or ear thereon, the boss or ear arranged to receive the ground engaging tool (GET) and have said GET retained therein by a connecting device, the boss or ear being predominantly disposed on the surface of the chamfer.
    [0036] Preferably, the boss or ear is welded to the bucket lip or integrally cast thereto.
    [0037] The bevel may be provided with an angle of 10° to 20°, preferably around 15°, so that the bevel surface for the boss or ear extends between 150 mm and 200 mm, preferably at around 200-220 mm, behind a leading edge of the flap. Thus, the boss or ear can be predominantly arranged on the chamfered surface, without needing to extend over the flat surface of the bucket. This helps to reduce the height profile of the hump or ear and therefore allows for a lower profile ground engagement tool as well as intensifying a straight line supply of the GET over the hump or ear.
    [0038] A further aspect of the present invention provides a method of releasing a connecting device prior to the removal of a ground engaging tool (GET) from earth moving equipment, the connecting device including an application element of force, a locking element and a body, the method including: - releasing the force applying element from a state of applied force to a state of relieved force, and at least partially retracting the locking element; - removing a spacer element placed between the connecting device and the ground engaging tool (GET); - moving the body, at least partially, to occupy the space created by said removal of the spacer element; - at least partially inserting a release element into the space created between the body and the ground engaging tool (GET), through said movement of the body, at least partially into the space of the spacer element; - actuate the force application element to, at least partially, retract the locking element within the body, and upon relative movement of the locking element with respect to the body, oblige the body to apply pressure through the release element to the Ground Engagement (GET) , to assist in releasing the Ground Engagement (GET) tool from the earth moving equipment.
    [0039] Therefore, advantageously, the connecting device can be used to help remove or loosen the ground engagement tool (GET), which, after prolonged use, can become wedged onto the flap of the ground handling equipment. earth, such as by filling fine particles in the cracks, inside or around the Ground Engagement Tool (GET), or by distorting the material of the GET, the boss or the flap of the earthmoving equipment.
    [0040] Furthermore, actuation of the force applying element may allow the locking element, which is engaged with a portion of the boss, to retract within the body, so that the locking element and the body move relatively between themselves. Because the locking element is engaged with the boss, the body moves forward to apply pressure to the release element inserted between the rear surface of the opening in the ground engaging tool, in front of the body. This allows the body to 'push' the ground engaging tool out of the boss, in that the locking element, for example a piston inside a locking pin, is hooked over a tab on the boss.
    [0041] In addition, the reaction force of the body pushing the ground engagement tool (GET) can allow the locking element to release itself from engagement with an element in the earth moving equipment, and at least partially retract the element locking into the body, thereby releasing the connecting device for removal from within the GET opening. Thus, a method is provided which positively releases the connecting device.
    [0042] Preferably, the release element includes a spacer element used at the rear of the connecting device. The spacer element may have an integral opening or recess that allows a drive tool to be inserted through the spacer element to operatively engage with the force applying element. The recess can take the form of a 'breaking means', in the sense of a hole that opens outside the perimeter of the spacer element. Therefore, the spacer element can also be used as a release element, for insertion between the body and the ground engaging tool (GET) to assist in the removal of said GET from the earth moving equipment.
    [0043] The recess in the spacer element may include a center hole and a perimeter opening that is wider than the center hole and which connects to the center hole, and which further opens to the perimeter of the spacer element. The wider portion of the perimeter may allow the spacer element to expand over the locking element, when the spacer element is inserted in front of the body, between the body and the ground engaging tool (GET).
    [0044] Preferably, the body of the connecting device includes at least one projection on both sides of an upper surface of the main portion of the body, and adjacent to the opening in the body, from which the locking element protrudes. These projections increase the front surface area of the body, particularly the surface area that the spacer element will contact, when inserted, to release the ground engagement tool (GET).
    [0045] Projections adjacent to the front surface of the body may have slanted or chamfered rear surfaces that assist in removing debris from the cavity behind the projections to help move or release the body.
    [0046] The force-applying element may be retained in the body by a resilient retaining device such as a circular tab around an axis portion of the force-applying element. A recess in the force applying element at least as wide as the diameter of the resilient retaining device can contact the resilient retaining device to prevent the force applying element from being withdrawn or removed from the body, until the device. retaining spring can be released, for example, by using a release tool.
    [0047] Preferably, the body has an upper surface that is externally exposed in the opening of the ground engagement tool (GET). Therefore, effectively, the upper surface of the body forms part of a surface for circular material when the ground engagement tool (GET) is in use, rather than the body being mostly or completely inserted into the tool. of engagement with the ground (GET) and protected by it. This allows for a low profile ground engaging tool (GET), which reduces material and manufacturing cost, as well as alleviating the flow of material over the ground engaging tool (GET) when required. GET is in use. Brief Description of Drawings
    [0048] It will further be convenient to describe the invention with reference to preferred embodiments of the invention. Other embodiments are possible and, consequently, the particularity of the following discussion is not to be understood as a substitute for the generality of the preceding description of the invention. In the drawings: Figure 1 shows a number of low profile bosses (also known as lugs or adapters) mounted on a front flap of a bucket of earthmoving equipment, in accordance with an embodiment of the present invention. Figure 2 shows a number of ground engaging tools (GET) attached to respective low profile bosses, as shown in figure 1, in accordance with an embodiment of the present invention. Figures 3 and 4 show various stages of assembling a ground engaging tool to a low profile boss, in accordance with an embodiment of the present invention. Figure 5 shows an exploded view of a connecting device and spacer element, according to an embodiment of the present invention. Figures 6 and 7 show views of a locking element of an embodiment of the present invention. Figure 8 shows an exploded view of a connecting device and spacer element, before being received into a recess, with the ground engaging tool (GET), according to an embodiment of the present invention. Figure 9 shows a connecting device assembled with an adjacent spacer element, according to an embodiment of the present invention. Figure 10 shows an embodiment of the connecting device resting on a boss, with the ground engagement tool (GET) absent, in order to show the position of the connecting device in relation to the boss. Figure 11 shows the connecting device of an embodiment of the present invention being received within the recess in the ground engaging tool, mounted on a boss, in the lip of a bucket. Figure 12 shows the spacer element of the connecting device being received within the recess of the ground engaging tool (GET) and adjacent to the rear of the body. Figure 13 shows a rear view focusing the connecting device with the spacer element in place, in accordance with an embodiment of the present invention. Figure 14 shows an alternative embodiment of the connection device of the present invention, not requiring the spacer element. Figures 15 and 16 show cross-sections through forms of alternative embodiments of the present invention. Figures 17 and 18 show cross-sections of an embodiment of the present invention, with an alternative form of a stop within the body, for contact with the force applying element. Figures 19 and 20 show components of a connecting device in exploded views, wherein Figure 19 shows a ground engaging tool (GET) modified in accordance with an embodiment of the present invention. Figures 21 and 22 show front and rear perspective views of a piston of the connecting device, according to the embodiment shown in Figures 19 and 20. Figure 23 shows an alternative embodiment of a connecting device with a piston mounted thereon. , and Figure 24 illustrates the connecting device mounted in a boss on a front flap of a ground engaging equipment. Figures 25 and 26 show front and rear perspective views of an assembly of a ground engaging tool (GET) with respect to a boss on a front flange of the equipment, in accordance with an embodiment of the present invention. Figure 27 shows a connecting device being inserted into an opening in the top of the ground engaging tool (GET) as shown in figures 25 and 26. Figure 28 shows the connecting device in a position within the ground engaging tool. ground engagement (GET) and a spacer element being inserted into an opening behind the connecting device prior to tightening the connecting device. Figure 29 shows a rear perspective view of the ground engaging tool (GET), the connecting device and the spacer element in position, in accordance with an embodiment of the present invention, as shown in Figure 28. Figures 30 to 33 show cross-sectional views of the steps involved in loosening the connecting device and the ground engaging tool (GET) to assist in removing said GET for replacement. Figure 34 shows a rear perspective view of the spacer element used in the feed opening, in front of the connecting device, to assist in loosening the ground engaging tool (GET) of the flange and boss. Description of Preferred Modalities
    [0049] A bucket (10) of an earth moving vehicle (not shown) has a front flap (12) with a plurality of bosses (14) (also known as lugs or adapters), each of these bosses arranged to receive a tool for engagement with the ground. The front lip tapers from a thicker rear portion, adjacent to the bucket (16) of the bucket, to a thinner front edge (18). Each boss fits over the flap and extends over the leading edge. Each boss is welded in place. Figure 2 shows some ground engaging tools (20), each mounted on a respective boss.
    [0050] Figure 3 shows a section of the front flange (18) of the bucket (10) . The tapered edge of the flap is clearly shown. The boss (14) has two arms (22, 24), which extend backwards across the upper surface of the conical flange. A boss contact surface (26) is provided between the two arms. A Ground Engagement (GET) tool (also known as a 'cover' in the form shown) has an opening (28) at the rear of the tool so that the GET is received over the boss. Figure 4 shows the boss being received within the opening of the ground engaging tool (GET) as said GET is mounted on the front edge of the bucket.
    [0051] Figure 5 shows an exploded view of a connection unit (30) according to an embodiment of the present invention. The connecting unit includes a body (32) within which a resilient device (34) is received, a force-applying element in the form of a screw (36), a locking element in the form of a piston (38) with an O-ring type sealing ring (40) to be received in an annular channel (42) around the locking element, a locking element stop in the form of a pin (44) received in a hole ( 46) on the piston, a key-shaped body stop (48) to be fitted into an opening underlying the body. Pin (44) prevents the piston from rotating within the body when the bolt is turned and advances the piston through the threaded engagement present. The bolt has an external thread (not shown) that engages with an internal thread (50) on the piston.
    [0052] For mounting the connecting device with the O-ring seal ring and the stop pin in place of the piston, the piston is initially threaded over the screw. The screw is first inserted into the head (52) into the body, with the device resiliently around the head. The key (48) is inserted into an opening underlying the body, which prevents the bolt from backing out of the body and acting as a stop for it, upon release of the connecting device to remove the ground engaging tool (GET). More details about this will be presented later. The body has an opening (54) which provides access to the screw head. In fact, it is preferred that the screw head protrude out of the opening, for easy access, for connecting a transmission device to the screw head, for tightening or loosening the connection device. The recess or collar (56) disposed on the bolt supports the resilient device, which therefore is held between the inner surface of the body adjacent the opening (54) and the collar/recess (56).
    [0053] A spacer element (58), when in use, sits adjacent to the rear surface (60) of the body and has a spacer opening (62) which aligns, when in use, with the opening (54) of the body .
    [0054] Figures 6 and 7 show views taken at a short distance from the locking element (piston (38)) . The piston includes a recess (64) and a wall or tab (66) arranged to contact a reverse tab on the boss during release of the connecting device. As shown in Figure 7, the piston has a chamfered advancing end (68) and a contact surface (70) arranged to contact the contact surface at the boss when the connection device is tightened. During release of the connecting device, the projection (92) of the body (32) pushes the trailing edge of the opening in the ground engaging tool (GET). This helps to push the GET out of the bucket boss and lip, thus improving the removal of the Ground Engagement Tool (GET).
    [0055] Figure 8 shows in exploded view the connecting device (30) before placement inside the top opening (72) to be received within a recess in the ground engaging tool, which is part of the opening (28 ) of the ground coupling tool (GET) (20) .
    [0056] Figure 9 shows the assembled connecting device (30), in the form of a cassette or cartridge, with the spacer element (58) behind. As can be seen, the piston (38) projects out of the body (32). The body includes a stop-type recess (74) to receive the piston pin and prevent the piston from rotating when actuated by the rotating bolt. The body also features a body or step recess (76) that allows the piston flange or wall to protrude sufficiently forward so that a space is created between the advancing end of the piston and the advancing surface (78) of the body. This space allows a flange or projection on the boss to extend into the space for engagement with the flange or piston wall during the loosening stage of the connecting device.
    [0057] When turning the bolt to an untightened state, the connecting device (when the ground engaging tool is removed), the piston contacts the boss flap, which retracts the bolt and piston together. The recess or collar on the bolt contacts the key that protrudes into the body, which results in the body being dragged towards the piston. This action allows the connecting device to contact and thereby be slackened into the recess or opening of the ground engagement tool (GET) for removal.
    [0058] Figure 10 shows an example of the assembled connecting device (30) contacting the boss (4). It should be noted that in a real life situation, the connecting device will be inserted into a ground engaging tool after the ground engaging tool has been mounted on the boss on the bucket lip. As shown, the piston (38) contacts the contact surface (26) of the boss. This makes it possible for the connecting device to apply a force to the boss when it is tight.
    [0059] Figure 11 shows the connecting device (30) being inserted into the recess in the ground engaging tool, mounted on the boss of a bucket flap. Figure 12 shows the next step of inserting the spacer element (58) into the recess behind the rear of the body (32). Figure 13 shows a rear view of the same assembly as Figure 12, showing access to the opening (62) through the spacer element and, consequently, access to the screw head, for tightening and loosening the connecting device.
    [0060] Figure 14 shows an alternative embodiment of the present invention, which does not require the spacer element. The connecting device (30) is inserted into an elongated opening (80) in the ground engaging tool (GET). This arrangement results in the upper surface (80) of the body (32) being more exposed during use than the aforementioned embodiment (which is angled into a shorter opening and slides into the engagement tool with the ground, after which the spacer element is put in place). However, the alternative mode of not having a spacer avoids the need for an extra spacer component, which could be lost, dropped or damaged, or simply forgotten when replacing the Ground Engagement Tool (GET).
    [0061] Figure 15 shows a cross section through an embodiment of the present invention, incorporating a spacer element. The piston contact surface (38) is shown contacting the boss contact surface, and the boss tab (84) is shown in the piston recess (64), so that the piston lip or wall (66) is capable of applying a force to the flange of the boss (84) when the connecting device is in the loosened state. In doing so, the bolt advances into the body due to the threaded engagement with the piston. Therefore, the piston works in the form of a nut and, consequently, different shapes of the locking element (eg the piston) can be used. Thus, for example, a square, hexagonal, octagonal, or other cross-sectional shape of the locking element can be used, which can reduce the need for a stop pin, because if the body has a cross-sectional opening complementary transverse to the multisided piston, the multiple sides will prevent rotation since the locking element is a sufficiently closed fit within the body.
    [0062] During the loosening (release) stage, the recess or collar (56) on the screw (36), which has a flat surface (86) on one side and a conical surface (88) on the other side, advances, because its connection is threaded to the nut (piston) . The conical surface contacts the wrench (48), which prevents further advance of the screw and forces the body to move forward, due to the nut (piston) being arranged in engagement with the boss during this loosening. Therefore, the connecting device positively contracts.
    [0063] Figure 16 shows an alternative arrangement of the spacerless embodiment of the present invention. No resilient device is provided between the screw head and the rear interior surface of the body.
    [0064] Figures 17 and 18 show cross sections through a ground engaging tool (GET) (20), fixed to a front edge or flap (8) of a bucket (10) by means of a connection device (30 ) . The connecting device (30) is of a type similar to that used in the embodiments of figures 15 and 16, which do not use a spacer element (58). The body includes two stops (90, 92) in the form of pins. When the connecting device is in the untightened state, as shown in Figure 17, the tab (66) of the piston/nut (38) engages with the tab (84) of the boss (14). With a further non-tightening stage, the body is pushed towards the piston by the force applying element (screw (36)), which is applied to the two pins (90, 92) inside the body.
    [0065] When the connecting device is tightened, as shown in figure 18, the piston advances as before, and the piston head contacts the boss contact surface, thereby with additional tightening. This causes the screw to move backwards, also causing the body to move backwards, upon direct contact of the screw with the rear interior surface of the body (or indirectly, through the resilient device).
    [0066] It should be noted that when the connecting device is in the loosened state, a projection onto the body (94) may be thrust against a portion (96) of the ground engagement tool (GET), to help move the said GET tool to the front and thereby assist in removing said GET from the bucket lip.
    [0067] The bucket lip preferably has an oblique or chamfered surface, of size between 110 mm and 130 mm, more preferably of approximately 120 mm. This provides a greater surface area on the bucket lip to receive the boss and be mounted, providing a lower bucket lip profile. This allows the ground engaging tool to have a lower profile and therefore reducing the amount of material in said ground engaging tool (GET) . This also facilitates installation and removal of the Ground Engagement (GET) tool in a single straight motion.
    [0068] An alternative embodiment of a connecting device (110) and ground engaging tool (GET) (112) is shown in Figure 19. The ground engaging tool (112) has a lower weight (profile lower) than the ground engaging tool (20) shown, for example, in Figure 3. The ground engaging tool (112) had an exposed opening (114) for receiving the connecting device (110) .
    [0069] Adjacent to the rear of the opening (114), the ground engaging tool (112) includes a spacer opening (116) for receiving the spacer element (118) at the rear of the connecting device.
    [0070] It can be seen that the body (20) of the connecting device will have an upper exposed surface (122) when mounted within the opening (114) of the ground engaging tool (GET). This differs from the protected upper surface for the connecting device body in the previously described embodiments, thereby confirming the lower profile of the ground engaging tool and of the entire mounting installation.
    [0071] The connecting device (110) includes the body (120 with an opening (124) for receiving a screw (126). The screw is retained within the body by means of a resilient retainer (128), such as , a circular tab. A piston (130) threadsly engages with the bolt. The piston features a projection (132) that prevents the piston from rotating when the bolt is rotated. Thus, the threaded relationship between the bolt and piston forces the piston to advance or retract relative to the body when the bolt is axially rotated in a clockwise or counterclockwise direction.
    [0072] The body (122) includes projections (134, 136) (not shown) directed towards the rear of the respective side surfaces (138, 140) (not shown) thereof.
    [0073] The guide end (142) of the body includes projections above the opening for receiving the bolt and piston. Projections help protect the piston from damage when the ground engagement tool is in use and provide additional material to reinforce the front end of the body. The projections (144, 146) include chamfered surfaces (148, 150) which provide a prying surface for a tool to pry the loose connection device, if necessary.
    [0074] The lower rear projections (134, 136) are oriented in corresponding slots or channels, in the opening of the ground engaging tool (GET) . Such slots or channels may also be provided as part of the opening (116) for the spacer element (118), preferably with a forward advance channel or slot portions of a lower end thereof, to allow the body to slide forward and be locked into place once inserted into the opening.
    [0075] As shown in Figure 20, the resilient device (152), such as one or more washers, may be provided behind a recess portion (154) of the bolt. The recess portion may include a beveled recess (156). The recess portion (154) provides a contact surface (158) against which the resilient device (152) can contact. The resilient device tilts the bolt forward towards the piston. The resilient retainer (128) prevents the bolt from leaving the body until it is released.
    [0076] As shown in figures 21 and 22, the piston (130) has an annular recess (160) and an annular projection (162). When in use, the annular projection engages a boss flap (170) . The boss flap (172) then engages within the recess.
    [0077] The end portion of the piston head (168) presses against the rear contact surface (174) of the boss. The rear portion of the piston includes an annular recess (164) which retains a resilient seal (166) for the piston at the opening of the body.
    [0078] The projection (132) is received within a slot (147) on the inner surface of the opening within the body, and prevents the piston from rotating when advanced by rotation of the screw.
    [0079] Figure 23 shows an assembled connecting device (110) with a spacer element (118) immediately behind.
    [0080] Figure 24 shows the connecting device (110) mounted in position against a contact surface of a boss (170), mounted on an edge flange (176) of a bucket portion (178). The Ground Engagement (GET) tool is not shown.
    [0081] Figures 25 to 29 show stages of attachment of a ground engaging tool (112) to the edge of the front flap (176) of the bucket section (178). In particular, figures 25 and 26 show respective rear and front perspectives of the low profile ground engaging tool (GET) (112) with respect to the boss (170) at the edge of the front flap of the bucket section.
    [0082] Figure 27 shows the connecting device (120) being inserted into the opening (114) at the top of the ground engaging tool (GET). Figure 28 shows the connecting device (120) positioned in the opening of the ground engaging tool and the spacer element (118) being inserted into the spacer opening (116), behind the connecting device which is moved forward into the opening (114) . It should be noted that the spacer element is arc-shaped, that is, it has an incomplete contour (180) around the entire opening to enable the spacer (118) to fit over the surface (162) of the piston (130) during the removal stage.
    [0083] As shown in figure 29, the spacer element is positioned in the spacer opening, behind the connecting device. Access from the opening to the screw head is clearly shown.
    [0084] Figure 30 shows a cross section through the engagement tool with the ground and connecting device already assembled. The connecting device is shown tight to retain the coupling tool with the ground in place. The screw advances the piston to engage with the inner contact surface of the boss. This causes the bolt recess to push back the resilient device, thereby forcing back the body of the connecting device to push the spacer element, which thus forces the spacer to push the engagement tool with the ground and therefore , holds the Ground Engagement Tool (GET) in place on the boss.
    [0085] Figure 31 shows the next step of removing the ground engagement tool. The bolt is undone and through its threaded engagement with the bolt, the piston retracts out of contact with the internal contact surface of the boss. This absorbs pressure from the spacer element, which allows the spacer to be removed. With the spacer removed, the bolt can then be operated again to extend the piston. As shown in figure 32, the piston is extended and the body is moved backward, projecting into the opening of the spacer element.
    [0086] As seen in figures 33 and 34, with the body positioned behind within the spacer opening (figure 31), the spacer element is then placed within the clearance created between the upper front surface (184) of the body and the edge (186 ) of the ground engaging tool (112), in the opening (114) . The screw can then be operated again to retract the piston, which forces the body to advance and contact the spacer element. Further operation of the screw forces the body to apply pressure to the spacer element, which is secured against the inside edge of the ground engaging tool (GET) of the opening. This allows the piston to retract into the body. The spacer element and the connecting device then can be easily removed from the ground engaging tool, and said ground engaging tool (GET) removed from the boss and the lip of the bucket.
    权利要求:
    Claims (19)
    [0001]
    1. Connecting device (30) for releasably attaching a ground engaging tool (GET) to earth moving equipment, the connecting device comprising a body, a force applying element and a locking element (38), the locking element being arranged to advance relative to the body so that the connecting device retains a ground attachment tool (GET) for the earth moving equipment by applying forces thereto, and the locking element being arranged to retract relative to the body upon release of the connecting device, the locking element including a first portion arranged to positively engage with a member of the earth moving equipment when the locking element retracts during release of the connecting device, characterized in that the first portion of the locking element including a recess, channel or slot (64) in the locking element by providing a projection or tab (66) on the locking element.
    [0002]
    2. Connecting device according to claim 1, characterized in that the projection of the locking element engages during the release of the connecting device, with a contact portion on a boss fixed to the earth moving equipment.
    [0003]
    3. Connecting device according to any one of the preceding claims, characterized in that the locking element (38) includes a stop device arranged to restrict or prevent rotation of the locking element during actuation and/or release of the connecting device.
    [0004]
    4. Connecting device (30) according to any one of the preceding claims, characterized in that the force application element includes a threaded element.
    [0005]
    5. Connecting device (30) according to claim 4, characterized in that the locking element includes a corresponding threaded element to provide threaded engagement with the threaded element of the force applying element.
    [0006]
    6. Connecting device according to any one of the preceding claims, characterized in that the locking element includes a nut.
    [0007]
    7. Connecting device (30) according to claim 6, characterized in that the locking element includes a cylindrical, rectangular, hexagonal or octagonal prism body portion.
    [0008]
    8. Connection device, according to any one of the preceding claims, characterized in that the force application element includes at least one stop device.
    [0009]
    9. Connecting device (30) according to claim 8, characterized in that the force applying element includes an undercut or collar means for engaging with a stop portion of the body on, within or connected to the body.
    [0010]
    10. Connecting device (30) according to claim 8, characterized in that the stop portion of the body includes an insert, wrench or grub screw, which projects to act as a stop for the application element force.
    [0011]
    11. Connecting device (30) according to any one of the preceding claims, characterized in that the force-applying element is slidably received in the body.
    [0012]
    12. Connecting device (30) according to any one of the preceding claims, characterized in that the force-applying element includes a portion that projects through an opening in the body, when received therein.
    [0013]
    13. Connecting device (30) according to any one of the preceding claims, characterized in that it further includes at least one or more resilient elements, received when in use, between a part of the force applying element and the body, and/or between a part of the force applying element and part of the force receiving element/locking element.
    [0014]
    14. Connecting device (30) according to claim 13, characterized in that the resilient element(s) includes means to restrict or prevent loosening of the connecting device, due to to vibration or impact of the ground engaging tool (GET), when in use.
    [0015]
    15. Connecting device (30) according to any one of the preceding claims, characterized in that the connecting device is provided as a pre-assembled unitary device before being received into the recess of the ground engaging tool (GET).
    [0016]
    16. Connecting device (30) according to any one of the preceding claims, characterized in that the body includes a projected portion that pushes the rear edge of the opening in the ground engagement tool (GET) so that the The designed portion applies a removal force to the Ground Engagement Tool (GET) when the coupling device is sufficiently loosened, whereby the removal force pushes the Ground Engagement Tool (GET) out of the boss.
    [0017]
    17. Method of releasing a ground engaging tool (GET) from earth moving equipment, the method being characterized by releasing a connecting device (30) provided to releasably secure the engaging tool with the ground (GET) to the earth moving equipment during the release of the connecting device, positively retracting together a locking element (38) and a body, to contract the connecting device, including a locking element to apply a force to a portion of the earthmoving equipment during retraction, wherein the force being applied to a boss disposed on a lip of a bucket of the earthmoving equipment, and wherein during loosening of the connecting device, the connection applies a removal force to the Ground Engagement (GET) tool.
    [0018]
    18. Method according to claim 17, characterized in that the method further includes: releasing a force applying element of the connecting device from a state of applied force to a state of relieved force, and at least partially retracting the locking element (38); removing a spacer disposed between the connecting device (30) and the ground engaging tool (GET); moving the body to at least partially occupy the space created by said removal of the spacer; inserting at least partially a release element into the space created between the body and the ground engaging tool (GET), through said movement of the body; actuate the force applying element to at least partially retract the locking element into the body, and upon relative movement of the locking element with respect to the body, oblige the body to apply pressure through the release element to the engagement tool to the ground (GET) to aid in the release of the Ground Engagement (GET) tool from the earth moving equipment.
    [0019]
    19. Method according to claim 18, characterized in that it includes actuating the force application element to allow the locking element (38), which is connected with a portion of the boss, to retract within the body, so that the locking element and the body move relatively to each other, and with the locking element (38) connected with the boss, the body moves forward to apply pressure to the release element inserted between the body and the rear surface of the opening in the Ground Engagement Tool (GET) in front of the body to allow the body to drive the Ground Engagement Tool (GET).
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    同族专利:
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    CN104603373A|2015-05-06|
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    MX2015002763A|2015-05-15|
    AP2015008286A0|2015-02-28|
    WO2014037780A1|2014-03-13|
    AU2013311371B2|2017-08-31|
    EA201590497A1|2015-06-30|
    MX357907B|2018-07-30|
    AU2013311371A1|2015-04-02|
    CA2882872C|2020-10-13|
    US9540796B2|2017-01-10|
    CL2015000456A1|2015-10-02|
    EP2893092A1|2015-07-15|
    CA2882872A1|2014-03-13|
    CN104603373B|2017-08-18|
    BR112015004689A2|2017-07-04|
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    法律状态:
    2018-07-03| B08F| Application fees: application dismissed [chapter 8.6 patent gazette]|
    2018-10-09| B08G| Application fees: restoration [chapter 8.7 patent gazette]|
    2018-11-21| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-02-11| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-04-20| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-06-29| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 04/09/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    AU2012903830|2012-09-04|
    AU2012903830A|AU2012903830A0|2012-09-04|Ground engaging tool mechanical attachment|
    AU2013901490|2013-04-29|
    AU2013901490A|AU2013901490A0|2013-04-29|Ground engaging tool mechanical attachment.|
    PCT/IB2013/001897|WO2014037780A1|2012-09-04|2013-09-04|Ground engaging tool mechanical attachment|
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