• 专利附录
  • 专利说明
  • 权利要求
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    • 专利摘要:
    SUPPORT PROTECTIONS DEFORMED AS A SUPPORT SEAL FOR A SET OF PULLEYS AND ASSEMBLY METHOD The present invention relates to a sheave assembly including a sheave having a geometric axis of rotation, a sheave wrap and a support; an axis having a receiving end of the pulley that receives the pulley; and a first support guard arranged at the receiving end of the axle pulley. The sheave wrap includes an annular wall that defines an opening for the support housing. The support is housed and has an inner rail, an outer rail, and a bearing element. The first support protection includes a deformed sealing element oriented against at least one of the external support rails and sheave wrap as a first contact seal to protect the support against contaminants.
    公开号:BR112012003253B1
    申请号:R112012003253-4
    申请日:2010-08-10
    公开日:2020-10-20
    发明作者:Anthony E. Lannutti；Robert J. Crist；Matthew J. Leis
    申请人:Dayco Ip Holdings, Llc；
    IPC主号:
    专利说明:

    TECHNICAL FIELD
    [001] The present invention generally relates to a support for a sheave to protect an exposed side of a sheave support against contaminants. BACKGROUND OF THE TECHNIQUE
    [002] Pulleys, such as; drive pulleys (front and rear side), eccentric pulleys, tensioner pulleys, and the like are often used for automotive use, for example, to drive or tension a belt in a drive system. The belt drive system may include a drive pulley and one or more eccentric pulleys and a belt arranged around the belt surface of each of the various pulleys. The belt surface can be, for example, smooth, deep V-shaped, notched or with multiple ribs.
    [003] In such automotive and other industrial applications, contaminants such as; dust, sand, salt and / or other foreign matter may be able to enter the pulley protection. Supports wear out more quickly when left open to contaminants, thereby reducing the life of the support. Contaminants can also cause the ball or rolling element to produce excessive noise or even jam. Binding may cause the drive belt to break or fall as a result of the belt sliding on a locked pulley.
    [004] A support seal is a first line of defense against contaminants, but it is often insufficient. Additional seals or sealing methods are often used to improve defense against contaminants, such as those described in U.S. Patent Nos. 4,916,750, 3,177,020 and 2,747,689 directed to double seals. These double seals, however, are included in the holder, rather than as an external seal.
    [005] Conventional labyrinth seals are an example of an external seal or support protection that reduces the amount of contaminants reaching the support. The problem with a labyrinth seal is that it still provides an open path under the seal, regardless of how short the path is, for contaminants to reach the support.
    [006] Other sealing designs use the sealing protections that are pressed into the hole in the pulley that houses the support. A problem with such designs is the difficulty of installation, which typically requires a special tool to press the support shield into the hole. In addition, the orifice requires tighter tolerances for securely retaining the support guard, which can be difficult to manufacture consistently. These seal designs, mentioned above, are not ideal. DE 10333673, for example, discloses such a seal design.
    [007] Consequently, it is desirable to have supportive protection that improves defense against contaminants, while also being easier to install and / or manufacture. SUMMARY
    [008] One aspect of a sheave assembly is described here to protect the support within a sheave wrap from contaminants. The sheave assembly includes a sheave having a geometric axis of rotation, a sheave wrap and a support; an axle having a pulley receiving end for receiving the pulley; and a first support guard arranged at the receiving end of the axle pulley. The sheave wrap includes an annular wall that defines an opening for housing the support. The support is housed in it and includes an inner rail, an outer rail and a bearing element between the tracks.
    [009] The first support protection includes a deformed sealing element oriented against at least one of the external support rail and the sheave wrap as a first contact seal to protect the support against contaminants.
    [010] In one embodiment, the first support protection includes a self-deformable plate having a deformed sealing element around the outer periphery of the self-deformable plate. In another embodiment, the first support protection includes a cup coupled to the deformed sealing element to position the deformed sealing element against at least one of an external support rail and the sheave wrap. In another embodiment, the first sealing support is a V-ring.
    [011] The sheave assembly may include a second support guard arranged on the opposite side of the sheave from the first protection of the sheave or between the support and, a fastener that secures the sheave and the support guards to the shaft. The second support protection can be a traditional support protection or can be similar to any modality of the first support protection.
    [012] In another aspect, a method of assembling the pulley assembly includes the provision of an articulated shaft that defines a geometrical axis of rotation and having a receiving end of the pulley, positioning a first support guard arranged at the receiving end of the articulated shaft pulley, positioning a pulley on the articulated axis for rotation around the geometric axis. The sheave includes a sheave wrap having an annular wall housing a support that has an inner rail, an outer rail, a rolling element between them. The first support guard includes a deformed sealing element oriented against at least one of an external support rail and the sheave wrap as a first contact seal. The method may also include attaching the sheave and the first support guard to the articulated shaft. Alternatively, the method may include placing a second support guard on the upper surface of the support, opposite the first support guard and attaching the sheave, the first support guard and the second support guard to the pivot shaft. BRIEF DESCRIPTION OF THE DRAWINGS
    [013] Figure 1 is a front cross-sectional view of a first embodiment of a set of pulleys.
    [014] Figure 2 is an enlarged view of the part of the first support protection within circle A of figure 1.
    [015] Figure 3 is a front cross-sectional view of a second embodiment of a pulley assembly.
    [016] Figures 4a and 4b are enlarged top and bottom views, respectively, of the first support protection of figure 3.
    [017] Figures 5a and 5b are enlarged top and bottom views, respectively, of the second support protection of figure 3.
    [018] Figure 6 is an enlarged view of part of the first support shield within circle B of figure 3 illustrating an alternative flange design.
    [019] Figure 7 is a front cross-sectional view of a third embodiment of a pulley assembly.
    [020] Figure 8 is an enlarged perspective view of the first support protection in figure 7.
    [021] Figure 9 is an exploded view of the first support protection in figure 8.
    [022] Figure 10 is a front cross-sectional view of a fourth embodiment of a set of pulleys.
    [023] Figure 11 is an enlarged view of part of the first support protection within circle C of figure 10. DETAILED DESCRIPTION
    [024] With reference now to the embodiment illustrated in figures 1 and 2, a pulley assembly, generally referred to as 100, is illustrated and includes a pulley 102 having a rotation axis 104, an axis 120 having a receiving end of the pulley 121 to seat the sheave on it, a first support guard 130, an optional second support guard 150, and a fastener 124. The receiving end of the sheave 121 of the shaft 120 includes a hub of the sheave 122 around which the sheave rotates and a mounting base 123. Generally, the sheave 102 and the shaft 120 contain an opening shaped to engage a fastener, such as a screw to provide a clamping force and to assist in fastening components of the sheave assembly. As appreciated by those skilled in the art, fastener 124 can also be a screw, pin, rivet, or other fasteners capable of providing fastening force. The opening in the pulley is typically and centrally located and passes through a support 110 housed within an opening 109 within the pulley 102.
    [025] Pulley 102 can be an eccentric pulley used with a drive belt system to drive an accessory or as a component of a belt tensioner to change the direction of the belt or to maintain the tension of the belt, but is not limited To this. In some cases, the pulley can serve as a wheel, gear, cylinders or the like.
    [026] The sheave 102 includes a sheave wrap 106 and a support 110. The sheave wrap 106 includes an annular wall 108 that defines an opening 109 to house the support 110. The sheave wrap 106 may include a surface on which to rotate the belt 107 which can generally be, but is not limited to, smooth, textured, ribbed or V-shaped ribs. Those skilled in the art will appreciate that the sheave wrap can have any design, including a wrap having a core that can include ribs or materials different from other parts of the sheave wrap. The sheave wrap can be molded or unmolded and can be a plastic or other suitable material.
    [027] The support 110 is housed within the opening 109 defined by the annular wall 108 of the sheave casing 106. The support includes an inner rail 112, an outer rail 114, a bearing element 116 between them, and has an upper surface and a bottom surface 118, 119, respectively. In the pulley assembly illustrated in Figure 1, the upper and lower surfaces 118, 119 are both exposed and vulnerable to contaminants without the first and second support protections 130, 150 present. The outer rail 114 is adjacent to the annular wall 108 and the inner rail 112 defines the opening that receives the fastener 124 and receives the hub of the sheave 122 at the receiving end of the sheave 121 of the shaft 120. The inner rail of the support 112 will rest on the mounting base 123 of the receiving end of the sheave 121 of the shaft 120.
    [028] The first support guard 130 is disposed at the receiving end of the sheave 121 of the shaft 120. The first support guard 120 is generally positioned between the receiving end of the sheave 121 and the bottom surface of the support 119 to prevent or reduce the entry of contaminants in the support. The first support guard includes a self-deformable plate 132 having an opening 134 (illustrated more clearly in an alternative embodiment in figures 4a and 4b as opening 234) and the deformed sealing element 136, around the outer periphery 138, of the plate self-deformable 132. The self-deformable plate 132 guides at least part of the deformed sealing element 136 against the outer rail 114 of the support 110 (see figures 1 and 2), and the annular wall 108 of the sheave casing 106 (see figure 7), or any other part of the sheave wrap 106, or any combination thereof as a first contact seal 140 (figure 2). The modalities illustrated in figures 1 to 11 illustrate an open cup style pulley wrap, but the deformed sealing element 136 can be used with any pulley style, so that the deformed sealing material can form a contact seal against the core or other part of a solid pulley.
    [029] Opening 134 can generally be located in the center of the self-deformable plate 132 and allows the inner periphery 137 of the self-deformable plate 132 to be seated on the mounting bases 123. As noted in figure 1, the inner rail 112 applies a force external to the inner periphery 137 of the first support guard 130 as transferred by the fastener 124 to hold the support guard 130 in place against the receiving end of the sheave 121 even when the sheave rotates, i.e., the inner periphery 137 is interposed between the receiving end of the sheave 121 and the inner rail 112. The inner periphery 137 of the self-deformable plate 132 may have a slight recess to seat the support guard 130 more securely between the receiving end of the sheave 121 and the inner rail 112.
    [030] The self-deformable plate 132 can be a spring plate. The spring plate can be self-deformable and can be made of metal. In alternative embodiments, the spring plate can be any wear grade plastic, particularly such as high temperature wear grade nylon 6/6, Nylatron GS, or rubber materials such as 60 Buna or 60 carboxylated Buna. As shown in figure 2, the spring plate can include a spring fold 144 which makes the plate self-deformable to orient at least a part of the deformed sealing element 136 against the outer rail 114 as a contact seal 140. The self plate deformable 132 is advantageous in that it continues to orient the deformed sealing element 136 against the outer rail 114 even as the sealing material thins as a result of friction. Another advantage of this design is that the spring bend 144 can be customized to improve or reduce the guiding force of the deformation element to change the characteristics of the contact seal to compensate for variations in the sheave designs.
    [031] The self-deformable plate 132 and the deformed sealing element 136 can be one piece or they can be separate components, connected together. The deformed sealing element 136 may consist of a sealing material that is wear-resistant, flexible, self-deformable, or any combination thereof. For example, suitable sealing material includes high temperature wear grade plastic, such as Nylon 6/6, Nylatron GS, or rubber materials such as 60 Buna, or 60 Carboxylated Buna.
    [032] In one embodiment, the sealing material can be integrally molded with, or shaped with the external periphery of the deformation element using techniques well known in the art, such as superior molding. As shown in Figure 2, the deformed sealing element 136 can be a generally disk-shaped body that generally extends about the same distance over the upper and lower surfaces of the outer periphery 138 of the deformation element. Alternatively, as shown in figures 3 and 4a and 4b, the deformed sealing element 236 may extend over more of the upper surface of the deformation element with respect to the lower surface. The mold can be designed so that the deformed sealing element 136 has approximately the same thickness above and below the deformation element, similar to figures 1 and 2. However, the molds can be designed to provide more sealing material (ie is, thicker) below the deformation element, similar to figures 3 to 6, or above the deformation element to position the outer periphery outside 138 closer to the upper or lower surface of the sealing material, respectively. The position of the outer periphery with respect to the thickness of the sealing material can improve or reduce the guiding force of the deformation element and therefore can be used to change the characteristics of the contact seal.
    [033] The deformed sealing element 136 can be continuous or discontinuous around the outer periphery 138. The continuous sealing material should provide a better defense against contaminants. The deformed sealing element 136 can be any material suitable to form a contact seal 140 against the outer rail 114 of the support 110 and / or the annular wall 108 of the sheave casing 106.
    [034] The deformed sealing element 136 may include a flange 142 extending generally parallel to the axis of rotation 104 of the outer periphery of the deformed sealing element 136 so that the flange 142 is pending on the annular wall 108 of the casing of the pulley 106. The flange, as illustrated in figures 1 and 2, is suspended from the annular wall without contact with it, thus creating a second labyrinth seal. In another embodiment, the flange can generally curve back towards the annular wall of the sheave wrap, as shown in figure 6, to provide a smaller opening so that it is more difficult for contaminants to travel upwardly under the flange or to contact the wall ring 108 to form a secondary contact seal 243. Flanges in any of the modalities shown here are adaptable to various sheave wrap designs, that is, the flange can have any configuration or shape to hang or extend beyond the outer rail of the support or a part of the sheave wrapper close to the upper surface of the support, with or without contact with it.
    [035] Still with reference to figure 1, the pulley assembly 100 may include a second support shield 150 disposed between the upper surface 118 of the support 110 and a part of the fastener extending beyond the opening 125, such as the head of a pulley screw. The second support guard 150 can be any conventional seal, for example, a labyrinth seal as illustrated in figure 1. Alternatively, the second support guard 150 can be similar to any modality of the first support guard described here, including the cup design in figures 7 to 9 if the configuration of the sheave wrap is modified to accommodate the cup design.
    [036] Referring now to Figure 3, a pulley assembly, generally designated 200, is illustrated and includes alternative modalities for the first support guard 230 and the second support guard 250, otherwise the other components and characteristics are the same to figure 1 and are numbered accordingly.
    [037] The first support guard 230 is arranged in the same position as that described for the first support guard in figure 1. The first support guard 230, as illustrated in figures 3 and 4a and 4b, includes a self-deformable plate 232 having an opening 234 defined by the inner periphery 237, as described above, and deformed sealing element 236 around the outer periphery 238 of the deformation element. A portion of the inner periphery 237 may have a slight recess to seat the support guard 230 more securely against the receiving end of the sheave 121. The deformed sealing element 236 extends across more of the upper surface than the surface bottom of the self-deformable plate 232 and the sealing material on the top surface includes one or more partitions 246 that match the protrusions 248 on the top surface of the self-deformable plate 232. The plastic material that is molded on the deformed element 232 may contain partitions 248 in the deformed sealing element 236 to allow diametric expansion once the support guard 230 has been deformed. Partitions 248 help prevent cracking in the deformed sealing element 236. The sealing material may include flange 242 that hangs from the annular wall 108 without contact with it or flange 242 '(figure 6) that hangs and contacts the annular wall to form a secondary contact seal 243.
    [038] The second support guard 250, illustrated in figures 5a and 5b, includes a self-deformable plate 252 having an opening 254 defined by the inner periphery 257, as described above, and the deformed sealing element 256 around the outer periphery 258 the deformation element. A part of the inner periphery 257 can be a slight recess to seat the support guard 250 more precisely between the upper surface of the supports 118 and the fastener 124. The second support guard 250 is similar in structure to the first support guard 230 , but it is dimensionally provided to cover the upper surface 118 of the support 118 and / or to hang or form a contact seal with the outer rail 114 of the support 110 or the part of the sheave wrap 106 that is adjacent to the outer rail. Like the first support guard 230, the second support guard 250 may have the deformed sealing element 256 extending across more of the upper surface than the lower surface of the self-deformable plate 252 and may include a flange 262. The element deformed seal 256 may include partitions 266 that match the protrusions 268 on the upper surface of the self-deformable plate 252 similar to those described for the first support guard 230.
    [039] The deformation elements and the sealing elements of both the first and second support guards 230, 250 can be a single piece or they can be separate components connected together, as described above. In both embodiments, the deformation element is illustrated as a generally flat plate that can be a metal plate or washer. Alternatively, the paca can be any of the other materials described above. The deformed sealing element 236 and 256 illustrated in figures 4a and 4b and in figures 5a and 5b, respectively, are molded on the outer periphery of the deformation element as a generally continuous disk-shaped element, but can be connected by other methods alternatives.
    [040] As shown in figure 3, both the first and second support guards 230, 250 have the outer periphery of the deformation element arranged in the sealing material so that the thickness of the sealing material under the plate that will form the sealing of contact is greater than the thickness of the sealing material above the plate, that is, "off center" as illustrated in cross section. Since the plate is generally flat and positioned off center within the sealing material, when fastener 124 applies an axial force to the inner periphery of one or both deformation elements 232, 252, the axial force causes the plate to deform the outer periphery 238, 258 axially in the direction of the support, thus orienting the sealing material in contact with the external rail 114 of the support 110 to form the contact seals 240 and 260, respectively. The contact seal will last longer if formed with the thickest part of the seal material on the underside of the deformation material.
    [041] Still with reference to figure 3, flanges 242 and 262 extend from the outer periphery of the body, generally in disk format of the sealing material of the first and second support seals 230, 250. The body in the shape of a disk can be configured so that the flange is arranged beyond the contact seal 240 or 260, and can hang from the outer rail 114 of the support 110, the annular wall 108 of the sheave wrap 106, and / or the wrap part of the pulley adjacent to the outer rail. The flange 242 does not come into contact with the annular wall 108 and the flange 262 does not come into contact with the part of the sheave wrapper adjacent to the outer rail 114. The flanges 242, 262 thus create a secondary labyrinth seal as a defense additional protection against contaminants.
    [042] Referring now to figure 6, which illustrates an enlarged view of the part of the second support shield within circle B in figure 3, an alternative flange design 242 'is illustrated. The flange 242 'extends from the deformed sealing element 236 and hangs through the annular wall 108 and curves back in the direction of the annular wall to contact it as a secondary contact seal 243 in addition to the first seal. contact 240. Those skilled in the art will appreciate that the flange can be designed to have numerous variations in shape, but what is important is that the flange comes into contact with another surface of the pulley to provide the secondary contact seal. This alternative flange design can also be applicable to the first support frame 250 if compatible with the design of the sheave wrap.
    [043] With reference now to figure 7, a pulley set, usually designated as 300, is illustrated and has an alternative modality for the first support of 230, otherwise the other components and characteristics are the same as in figures 1 and 3 with corresponding numerical references. The first support guard 330 forms a first contact seal 340 between the deformed sealing element 336 and the annular wall 108 of the sheave casing 106 instead of against the bottom surface 119 of the support 110, specifically the outer rail 114. While the deformed sealing element 336 is shown on an inner wall of the cup 332, it can also alternatively be on the outer wall of the cup or it can cover the rim 338 so that the contact seal can be formed against at least one of the walls of core 117 or the outer annular wall 108 '. In another embodiment, if the annular wall 108 is shorter or has openings that expose the outer rail 114 adjacent to the annular wall 108, the deformed sealing element 336 may contact the outer rail surface to form the contact seal 340. If the the sheave wrap is a solid body, so the deformed sealing element can contact any part of the sheave wrap to form the contact seal or even fit into a groove formed in the sheave wrap.
    [044] The first support guard 330, as illustrated in figures 7 to 9, includes a cup 332 and deformed sealing element 336. While cup 332 is illustrated as having a generally circular sidewall 335, the cup is not limited To this. Cup 332 has an opening 334, similar to that described for the self-deformable plate 132 above and a rim 338 that defines the outer periphery of the cup. The cup 332 is shaped to place at least part of the deformed sealing element 336 against the annular wall 108 as the contact seal 340. The sealing material is deformable on or against the annular wall 108. The rim 338 of the cup may include one or more partitions 346 or other configuration for connecting the deformed sealing element 336 to the cup 332.
    [045] The deformed sealing element 336 can be continuously or discontinuously arranged around the rim 338 of the cup 332 and can generally be shaped to match the rim 338. At least part of the deformed sealing element 336 can align the inner circumference of the 335 cup wall or walls. As illustrated in figures 7 to 9, the sealing material is an annular ring that includes one or more protrusions 348 to match the partitions 346 in the rim 338 of the cup 332 to connect the sealing member and the cup. The protrusions 348 and the partitions 346 may have a generally tight or loose fit. Even a loose fit keeps the sealing material in place as a result of the assembly illustrated in figure 7, where there is no space for the sealing material to slip from between the cup and the part of the sheave wrapper adjacent to the annular wall.
    [046] The deformed sealing element 336, as illustrated, also includes one or more continuous or discontinuous protrusions 341 projecting outwardly from the sealing material into the cup and which will come in contact with a part of the pulley, such as annular wall 108, to form contact seal 340. The protrusion 341 generally makes the deformed sealing element self-deformable. The projection is shaped and / or angled so that when placed in contact with a part of the pulley to form the contact seal the projection is deformed in the direction of the cup while remaining in contact with the pulley. As the sealing material wears out as a result of friction when the sheave rotates, the sealing material is oriented in the direction of the sheave to maintain contact with it, thus maintaining the contact seal and protecting the support from contaminants.
    [047] The cup 332 and the deformed sealing element 336 can be separated, as shown in figure 9. In an alternative embodiment, the deformed sealing element 336 can be integrally formed with or molded simultaneously with the cup, for example, the sealing material can be molded on the rim.
    [048] With reference now to figure 10, a pulley assembly, usually designated 400, is illustrated and has an alternative modality for the first support protection, otherwise the other components and characteristics are the same as in figures 1 and 3 with corresponding numerical references. The first support shield 430 forms a first contact seal 440 between the deformed sealing element 432 and the outer rail 114 of the support 110. Alternatively, the deformed sealing element 432 can form the contact seal against the annular wall 108 or any other part of the sheave wrap, or one of these in combination with the outer rail of the support.
    [049] The first support guard 430 is a V 438 ring. The V 438 ring has a first side of the V 438 'and a second side of the V 438 "as labeled in the cross section shown in figure 11. (Figure 11 is the same as the part of figure 10 shown in circle C except that flange 460 and ferrule 462, described in greater detail below, have been removed.) Deformed sealing element 438 is the first side of V 438 'and a spacer 442 is the second side of the V 438 ". The deformed sealing element 438 has a leading edge 444 and a trailing edge 446 and spacer 442 is connected to trailing edge 446. Within the mounted sheave spacer assembly 442 positions leading edge 444 above the top surface of mounting base 123. In that position, the outer support rail or part of the sheave wrap presses the deformed sealing element in the direction of the spacer to form the first contact seal 440. Deformed sealing element 438 can be deformed between 0.5 mm and 1 , 5 mm.
    [050] The V-ring 438 may have the deformed sealing element 432 at an angle of about 35 ° to about 55 ° with respect to the pre-assembled spacer. In one embodiment, the V-ring has a pre-assembled 45 ° angle. V-rings are commercially available with various shapes, angles and diameters. V-rings are generally made of non-woven elastomer or laminated metal reinforcement. They can be stretched and, depending on the size, they can be pushed onto other components of the arrangement, for example, mounting base 123. The V-ring is advantageous since it is easily replaceable. Since the V-ring has a pre-assembly angle that is deformed during assembly, the deformed sealing element is self-deformable as the pulley is removed from the deformed sealing element and the deformed sealing element returns to its original position. .
    [051] The receiving end of the sheave 121, as shown in figure 10, can include a flange 460 that optionally includes the ferrule 462 that surrounds the outer perimeter of the V-ring 438. Alternatively, as shown in figure 11, the ring in V 438 rests on a generally flat surface.
    [052] The pulley assembly 400 as illustrated in figure 10 also includes a second support guard 450 and a cover 480. The second support guard 450 can be any of the protections described here or as illustrated to those skilled in the art. Figure 10 illustrates a first support shield 430 as a second V-ring 454. The second V-ring includes a deformed sealing material 452 and a spacer 456. The cover 480 includes a mounting base 482. The second support shield 450 rests against mounting base 482 and is arranged on the upper surface 118 of support 110. The second V-ring 454 has a pre-assembly angle as described above and is deformed in the direction of spacer 456 when mounted. The cap 480 can optionally include a flange 484 that surrounds the outer perimeter of the second V-ring. When the flange 484 is present it appears that the second V-ring 454 is contained within a recess in the cap 480. The recess may be larger than that the second V-ring since the V-ring has a stretched fit through the mounting base and is stationary, that is, the second V-ring 454 does not rotate around the geometric axis 104, does not move along the geometric axis nor move outward away from the geometric axis. The same is true of the V 438 ring.
    [053] In another aspect, a method of mounting any of the various modes of the pulley assemblies described above includes providing an articulated shaft 120 defining a rotational axis 104, positioning a pulley 102 on the articulating axis for rotation around the geometric axis, placing a first support protection, such as support protection 130, 230, or 330 on the bottom surface of the support. The placement of the first support guard may include the coaxial mounting of the support guard between the support 110 and the pivot shaft 120 of the pulley assembly. The method may also include fixing the sheave and the first support guard to the articulated shaft, which may include the use of a fastener 124, as described above.
    [054] The method may include the placement of a second support protection, such as support protection 150, 250 or other available covers or seals, on the upper surface 118 of support 110 and the fixing of the pulley and the first and second protections supporting the articulated shaft. The second support guard can be positioned between the upper surface of the support and a part of the fastener 124, such as the head of a pulley screw.
    [055] In each of the modalities described here, a deformed sealing element creates the contact seal with a part of the sheave, where in contact with the external rail of the support or a part of the sheave wrap. The deformed sealing element is deformed to form the contact seal by a component of the support guard, by other components of the sheave assembly, especially the sheave, if self-deformable, or a combination thereof. The fact that the sealing element is deformed provides the advantage that as the sealing element gradually wears out as a result of friction with the sheave, the sealing element is oriented in the direction of the sheave to maintain the contact seal for the life of the sheave. deformed sealing element, thus providing support with improved protection against contaminants.
    [056] The modalities of this invention, illustrated in the drawings and described above, are exemplary of the numerous modalities that can be made within the scope of the appended claims. It is contemplated that innumerable other configurations of the pulley sets can be created taking advantage of the described approach. In short, it is the applicant's intention that the scope of the patent issued from that application is limited only by the scope of the attached claims.
    权利要求:
    Claims (16)
    [0001]
    1. A set of pulleys (100, 200), comprising: a pulley (102) having a rotation axis (104) and comprising a sheave wrap (106) and a support (110), the sheave wrap having an annular wall (108) defining an opening (109) for housing the support, the support being in the opening, the support having an inner track (112), an outer track (114) and a bearing element (116) between them; an axis (120) having a pulley receiving end (121); a first support guard (130) disposed at the pulley receiving end of the shaft, the first support guard having a self-deformable plate (132) and an associated deformed sealing element (136), in which the self-deformable plate deforms the sealing element deformed against the external support rail, against a part of the sheave wrap, or both as a first contact seal to protect the support against contaminants; characterized in that the deformed sealing element is positioned around the outer periphery of the self-deformable plate and includes a flange (142) extending parallel to the axis of rotation from the outer periphery of the self-deformable plate in a direction away from the axis, the flange positioned to hang from a part of the sheave wrap without being in contact with it.
    [0002]
    2. Pulley assembly (100, 200) according to claim 1, characterized in that the self-deformable plate (132) and the deformed sealing element (136) are integrally formed.
    [0003]
    3. Pulley assembly (100, 200) according to claim 1, characterized in that the deformed sealing element (136) is a disk-shaped body of sealing material molded on the outer periphery of the self-deformable plate (132 ).
    [0004]
    Pulley assembly (100, 200) according to claim 2, characterized in that the self-deformable plate (132) includes a spring bend (144) that deforms the sealing element (136) as the inner periphery the self-deformable plate (132) is inserted between the receiving end of the pulley (121) of the shaft (120) and the pulley (102).
    [0005]
    5. Pulley set (100, 200) according to claim 1, characterized in that the self-deformable plate (132) and the flange (242) define a cup (332) coupled to the deformed sealing element (136) to position the sealing element deformed against at least one of the outer rail (114) of the support (110) and the sheave wrap (106).
    [0006]
    6. Pulley set (100, 200) according to claim 1, characterized in that the deformed sealing element (136) is self-deformable and the cup (332) has a rim (338) configured to receive the sealing element self deformable.
    [0007]
    7. Pulley assembly (100, 200) according to claim 6, characterized in that the rim (338) includes one or more partitions and the self-deformable sealing element (136) includes protuberances shaped to fit at least one or more partitions (246).
    [0008]
    8. Pulley assembly (100, 200) according to claim 7, characterized in that the self-deformable sealing element (136) has one or more protrusions (341) of sealing material on the surface thereof that come into contact with at least one of the outer rails (114) of the support (110) and the sheave wrap.
    [0009]
    9. Pulley set (100, 200) according to claim 1, characterized in that it comprises a second support guard arranged to protect the support surface (110) opposite the first support guard.
    [0010]
    10. Method of assembling a pulley assembly (100, 200) that protects pulley supports against contaminants, according to claim 1, characterized by comprising: the positioning of the first support protection at a pulley receiving end of the articulated shaft; the positioning of the pulley on the articulated axis for rotation around the axis, with the first support protection between the pulley and the articulated axis.
    [0011]
    Method according to claim 10, characterized in that the receiving end of the pulley (121) of the articulated shaft (120) includes a mounting base (123) and the positioning of the first support guard (130) includes mounting coax of the first support protection in contact with the mounting base.
    [0012]
    Method according to claim 10, characterized in that the first support guard (130) includes an opening located in the center thereof, where the opening rests with the first support guard at the receiving end of the pulley (121) of the shaft articulated (120).
    [0013]
    Method according to claim 10, characterized in that it comprises fixing the sheave (102) and the first support protection (130) to the articulated shaft.
    [0014]
    Method according to claim 10, characterized in that it comprises the positioning of a second support protection on the upper surface of the pulley.
    [0015]
    Method according to claim 10, characterized in that the first support protection (130) includes a cup (332) coupled to the deformed sealing element (136) to position the deformed sealing element against the external rail, against a part of the pulley wrap or both.
    [0016]
    Method according to claim 15, characterized in that the deformed sealing element (136) is self-deformable.
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    同族专利:
    公开号 | 公开日
    US20110039648A1|2011-02-17|
    EP2464883A1|2012-06-20|
    CA2766928C|2015-11-03|
    CA2855311C|2015-09-29|
    CN102472324B|2014-04-23|
    CN102472324A|2012-05-23|
    WO2011019676A1|2011-02-17|
    AU2010282696B2|2014-01-23|
    JP5600169B2|2014-10-01|
    AU2010282696A1|2012-02-23|
    CA2766928A1|2011-02-17|
    MX2012001719A|2012-04-02|
    KR20120034107A|2012-04-09|
    JP2013501904A|2013-01-17|
    KR101384933B1|2014-04-11|
    EP2464883A4|2016-02-24|
    BR112012003253A2|2016-03-01|
    EP2464883B1|2018-10-10|
    CA2855311A1|2011-02-17|
    US8905879B2|2014-12-09|
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    法律状态:
    2016-10-04| B25A| Requested transfer of rights approved|Owner name: DAYCO IP HOLDINGS, LLC (US) |
    2019-01-15| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-09-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-06-30| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-10-20| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 20/10/2020, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US12/539,104|2009-08-11|
    US12/539,104|US8905879B2|2009-08-11|2009-08-11|Deflected bearing shield as a bearing seal for a pulley assembly and method of assembly|
    PCT/US2010/044943|WO2011019676A1|2009-08-11|2010-08-10|Deflected bearing shield as a bearing seal for a pulley assembly and method of assembly|
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