Wheel and all-terrain vehicle set

Abstract

The present invention relates to a wheel assembly comprising a rim mounting seat (1) and a drive shaft (2) connected coaxially, a support (3) having a first mounting hole, a bearing (4), a first and a second sealing element (5, 6), at least a portion of the drive shaft and the rim mounting seat being disposed in the first mounting hole; the first and second sealing elements and the bearing are disposed successively along an axial direction of the drive shaft, and the first sealing element and the bearing are press-fitted between an outer peripheral surface of the rim mounting seat and an inner wall surface of the first mounting hole, and the second sealing element is press-fitted between an outer peripheral surface of the drive shaft and the inner wall surface of the first mounting hole. Abbreviated figure: Figure 1

Description

Title of the invention: Wheel and all-terrain vehicle assembly technical field

[0001] The present invention relates to the technical field of vehicles, in particular to a wheel assembly and an all-terrain vehicle. Technological background

[0002] A vehicle wheel primarily supports the load via a front steering knuckle or a rear wheel bearing seat and transmits torque via a wheel hub, thus performing the wheel's rotational function. The front steering knuckle or rear wheel bearing is rotationally connected to the rim mounting seat and the drive wheel via a bearing. However, in a prior art wheel assembly, the bearings are generally exposed, and in harsh environments, such as when the wheel assembly is used by an off-road vehicle, foreign matter easily enters the bearing, exacerbating wear and bearing failure, thereby reducing its service life. Summary of the present invention

[0003] The present invention aims to solve, at least to some extent, one of the technical problems of the technological background.

[0004] Consequently, the embodiments of the present invention provide a wheel assembly which has the advantages of good sealing around the bearing and a long bearing life.

[0005] The present invention also proposes an all-terrain vehicle.

[0006] The wheel assembly of embodiments of the present invention comprises a rim mounting seat, a drive shaft and a support, wherein the rim mounting seat and the drive shaft are coaxially connected, and the support has a first mounting hole, and at least a portion of the drive shaft and the rim mounting seat are disposed in the first mounting hole; and a bearing, a first sealing element and a second sealing element, wherein the first sealing element, the bearing and the second sealing element are disposed successively along an axial direction of the drive shaft; the first sealing element and the bearing are both press-fitted between an outer peripheral surface of the rim mounting seat and an inner wall surface of the first mounting hole;and the second sealing element is tightly mounted between an outer peripheral surface of the drive shaft and the inner wall surface of the first assembly hole.

[0007] According to embodiments of the wheel assembly of the present invention, the support is rotationally connected to the rim mounting seat and to the drive shaft via a bearing, and a first sealing element is press-fitted between the outer peripheral surface of the rim mounting seat and the inner wall surface of the first assembly hole in the support, and a second sealing element is press-fitted between the outer peripheral surface of the drive shaft and the inner wall surface of the first assembly hole in the support, and the first sealing element and the second sealing element are located respectively on both sides of the bearing in the axial direction of the bearing.At this point, the bearing is separated from the outside by the first sealing element and the second sealing element, and foreign impurities are less likely to enter the bearing, effectively reducing the risk of bearing wear and failure and extending its service life.

[0008] In some embodiments, the first sealing element and the second sealing element comprise a lip seal or a sealing ring.

[0009] In some embodiments, the support includes a front spindle or a rear wheel bearing seat.

[0010] In certain embodiments, the bearing comprises an inner ring, an outer ring, a third sealing element, a fourth sealing element and a rolling element, in which the rolling element is mounted in contact between an outer peripheral surface of the inner ring and an inner peripheral surface of the outer ring; the third sealing element and the fourth sealing element are both installed between the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring; and the third sealing element and the fourth sealing element are located on either side of the rolling element in an axial direction of the inner ring.

[0011] In some embodiments, the third and fourth sealing element consists of a sealing ring or a dust cover.

[0012] In certain embodiments, the outer peripheral surface of the rim mounting seat comprises a first peripheral surface and a second peripheral surface, in which a diameter of the first peripheral surface is greater than a diameter of the second peripheral surface, the first peripheral surface being separated from the second peripheral surface by a first shoulder, the first sealing element being fitted onto the first peripheral surface, and the inner ring being fitted onto the second peripheral surface; the drive shaft having a second shoulder opposite the first shoulder, and the inner ring being located between the first shoulder and the second shoulder.

[0013] In some embodiments, the second shoulder divides the drive shaft into a first shaft section and a second shaft section, and the second sealing element is fitted onto an outer peripheral surface of the first shaft section; and the wheel assembly further includes a locking piece, the rim mounting seat has a second mounting hole, and the second shaft section passes through the second mounting hole and is connected to the locking piece.

[0014] In some embodiments, the first assembly hole comprises a first hole section and a second hole section, an opening in the first hole section being larger than an opening in the second hole section, and an inner wall surface in the first hole section passing to an inner wall surface in the second hole section via a third shoulder; and the first sealing element and the outer ring are both mounted in the first hole section, and the second sealing element is mounted in the second hole section.

[0015] In some embodiments, the inner wall surface of the first hole section has an annular groove, and the wheel assembly further includes a retaining ring, a portion of the retaining ring being mounted in the annular groove, and another portion of the retaining ring being located between the first sealing element and the outer ring.

[0016] An all-terrain vehicle according to the embodiments of the present invention includes the wheel assembly as described in one of the above embodiments.

[0017] The technical advantages of the all-terrain vehicle according to the embodiments of the present invention are the same as those of the wheel assembly of the above embodiments, and will not be repeated here. Brief description of the figures

[0018] Fig. 1 is a schematic view of a wheel assembly according to an embodiment of the present invention.

[0019] Figure [Fig. 2] is a partial enlarged view of a wheel assembly according to a mode of realization of the present invention.

[0020] Reference figures:

[0021] 1. rim mounting seat; 11. first peripheral surface; 12. second 1. Peripheral surface; 13. First shoulder; 2. Drive shaft; 21. First shaft section; 22. Second shaft section; 23. Second shoulder; 3. Support; 31. First bore section; 31. Annular groove; 32. Second bore section; 33. Third shoulder; 4. Bearing; 4L Outer ring; 42. Inner ring; 43. Rolling element; 44. Third sealing element; 45. Fourth sealing element; 5. First sealing element; 6. Second sealing element; 7. Locking piece. Detailed description

[0022] Embodiments of the present invention, examples of which are illustrated in the accompanying drawings, will be described in detail below. The embodiments described below with reference to the drawings are illustrative and intended to explain the invention, but should not be interpreted as limiting the invention.

[0023] A wheel assembly according to an embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

[0024] The wheel assembly of embodiments of the present invention comprises a rim mounting seat 1, a drive shaft 2, a support 3, a bearing 4, a first sealing element 5, and a second sealing element 6. The rim mounting seat 1 and the drive shaft 2 are coaxially connected, and the support 3 is provided with a first mounting hole, and at least a portion of the drive shaft 2 and the rim mounting seat 1 are disposed in the first mounting hole. The first sealing element 5, the bearing 4, and the second sealing element 6 are arranged successively along an axial direction of the drive shaft 2.The first sealing element 5 and the bearing 4 are both press-fitted between an outer peripheral surface of the rim mounting seat 1 and an inner wall surface of the first mounting hole, and the second sealing element 6 is press-fitted between an outer peripheral surface of the drive shaft 2 and the inner wall surface of the first mounting hole.

[0025] According to the wheel assembly of embodiments of the present invention, the support 3 is rotationally connected to the rim mounting seat 1 and to the drive shaft 2 via the bearing 4, and the first sealing element 5 is adjusted by interference between the outer peripheral surface of the rim mounting seat 1 and the surface of the inner wall of the first assembly hole in the support 3, and the second sealing element 6 is adjusted by interference between the outer peripheral surface of the drive shaft 2 and the surface of the inner wall of the first assembly hole in the support 3, and the second sealing element 6 is adjusted between the outer peripheral surface of the drive shaft 2 and the surface of the inner wall of the first assembly hole in the support 3,and the first sealing element 5 and the second sealing element 6 are located on both sides of the bearing 4 in the axial direction of the bearing 4. At this point, the first sealing element 5 and the second sealing element 6 separate the bearing 4 from the outside and, consequently, the foreign impurity is less, capable of penetrating bearing 4, which effectively reduces the risk of wear and failure of bearing 4 and extends the life of bearing 4.

[0026] It should be noted that the outer peripheral surface of the mounting seat for the rim 1 and the drive shaft 2, as well as the surface of the inner wall of the first mounting hole in the support 3, jointly surround an annular chamber with two openings at either end of the annular chamber. The first sealing element 5, the bearing 4, and the second sealing element 6 are all mounted in the annular chamber, and the first sealing element 5 and the second sealing element 6 are adjacent to two openings at either end of the annular chamber, respectively.

[0027] In some embodiments, the first sealing element 5 and the second sealing element 6 comprise a lip seal or a sealing ring, the sealing ring being an O-ring.

[0028] In other words, the first sealing element 5 and the second sealing element 6 can both be oil seals, or both sealing rings, or the lip seal and the sealing ring respectively. The oil seal and the tight-fitting sealing ring can stably and reliably seal the cavities on both sides of the bearing 4 when the support 3 rotates relative to the rim mounting seat 1 and the drive shaft 2, thus reducing the likelihood of impurities accidentally entering the bearing 4.

[0029] More specifically, as shown in Figures 1 and 2, the first sealing element 5 and the second sealing element 6 are oil seals.

[0030] In some embodiments, the support 3 includes a front steering ball joint or a rear wheel bearing seat.

[0031] The support 3 can be the front steering ball joint, so that the wheel assembly can be used as the front wheel of a vehicle such as an all-terrain vehicle, and the support 3 can also be a rear wheel bearing seat, so that the wheel assembly can be used as the rear wheel of a vehicle such as an all-terrain vehicle. The scope of application of the wheel assembly of the embodiments of the present invention is thus broadened, and all wheels of all-terrain vehicles can apply the wheel assembly of the embodiments of the present invention, so that the rotational stability of all wheels of all-terrain vehicles is higher and the adaptability of all wheels of all-terrain vehicles to difficult environments is stronger.

[0032] In certain embodiments, as shown in [Fig. 2], the bearing 4 comprises an inner ring 42, an outer ring 41, a third sealing element 44, a fourth sealing element 45, and a rolling element 43. The rolling element is mounted in contact between an outer peripheral surface of the inner ring 42 and an inner peripheral surface of the outer ring 41, and the third sealing element 44 and the fourth sealing element 45 are mounted between the outer peripheral surface of the inner ring 42 and the inner peripheral surface of the outer ring 41. The third sealing element 44 and the fourth sealing element 45 are located on either side of the rolling element in the axial direction of the inner ring 42.

[0033] Therefore, when foreign impurities accidentally pass through the first sealing element 5 and the second sealing element 6, the third sealing element 44 and the fourth sealing element 45 prevent the impurities from penetrating further into the area where the rolling element 43 is located. The aforementioned two-stage sealing method further prevents impurities from affecting the rolling element 43 of the bearing compared to the inner ring 42 and the outer ring 41, so that the rolling element 43 is less subject to wear when rolling compared to the inner ring 42 and the outer ring 41, and the service life of the bearing 4 is therefore longer.

[0034] More specifically, one side of the rolling element 43 is provided with a third sealing element 44 and a first sealing element 5 successively, and the other side of the rolling element 43 is provided with a fourth sealing element 45 and a second sealing element 6 successively.

[0035] In some embodiments, the third sealing element 44 and the fourth sealing element 45 include a sealing ring or a dust cover.

[0036] The sealing ring and dust shield can effectively prevent external impurities from entering the area where the rolling element 43 is located, which effectively reduces the wear rate of the rolling element 43, the inner ring 42 and the outer ring 41, and extends the service life of the bearing 4.

[0037] In certain embodiments, as shown in Figures 1 and 2, the peripheral surface of the rim mounting seat 1 comprises a first peripheral surface 11 and a second peripheral surface 12, the diameter of the first peripheral surface 11 is larger than the diameter of the second peripheral surface 12, the first peripheral surface 11 is connected to the second peripheral surface 12 by a first shoulder 13, the first sealing element 5 is fitted onto the first peripheral surface 11, and the inner ring 42 is fitted onto the second peripheral surface 12. The drive shaft 2 has a second shoulder 23 opposite the first shoulder 13, and the inner ring 42 is located between the first shoulder 13 and the second shoulder 23.

[0038] In other words, once the drive shaft 2 is connected to the rim mounting seat 1, the inner ring 42 of the bearing 4 is sandwiched between the first shoulder 13 and second shoulder 23, so that the relative fixing of the bearing 4, the drive shaft 2 and the rim mounting seat 1 in the axial direction of the bearing 4 is achieved, and the bearing 4 is not easy to shake or even fall provided that the drive shaft 2 and the rim mounting seat 1 are stably connected, which effectively ensures the operation of the bearing 4.

[0039] More specifically, the radial dimensions of the first shoulder 13 and the second shoulder 23 on the drive shaft 2 are less than or equal to the radial dimension (thickness) of the inner ring 42. Once the drive shaft 2 is connected to the mounting seat of the rim 1, the inner ring 42 is pressed between the first shoulder 13 and the second shoulder 23.

[0040] In some embodiments, as shown in [Fig.2], the second shoulder 23 divides the drive shaft 2 into a first shaft section 21 and a second shaft section 22, and the second sealing element 6 is fitted onto the outer peripheral surface of the first shaft section 21. The wheel assembly also includes a locking piece 7, the rim mounting seat 1 is provided with a second mounting hole, and the second shaft section 22 passes through the second mounting hole and is connected to the locking piece 7.

[0041] The second shaft section 22 passes through the second assembly hole and is connected to the locking piece 7, so that the coaxial connection between the drive shaft 2 and the rim mounting seat 1 can be achieved, and the axial limit of the bearing 4 can also be achieved, and the assembly and disassembly of the wheel assembly is convenient and reliable.

[0042] More specifically, the locking piece 7 can be a locking nut, and the second section of the shaft 22 is provided with an external thread. Once the portion of the second section of the shaft 22 with the external thread passes through the second mounting hole, the locking nut is engaged by screwing onto the external thread. At this stage, the locking piece 7 can also include a pin. In this case, an insertion hole is provided on the outer peripheral surface of the second shaft section 22, and the insertion hole is located on the side of the locking thread furthest from the first shaft section 21, and extends along the radial direction of the second shaft section 22. A portion of the pin is inserted into the insertion hole, and the remainder of the pin abuts against the side of the locking nut opposite the mounting seat of the rim 1.

[0043] It should be noted that the end of the first shaft section 21 away from the second shaft section 22 may also be provided with a thrust shoulder, and the thrust shoulder is adjacent to the second sealing element 6, and the distance between the thrust shoulder and the second sealing element 6 is less than the The axial dimension of the second sealing element 6 effectively prevents the second sealing element 6 from inadvertently slipping. Furthermore, the remaining portion of the rim, excluding the rim mounting seat 1, is located on the side of the first sealing element 5, opposite the bearing 4 and adjacent to the first sealing element 5. The distance between this remaining portion and the first sealing element 5 is less than the axial dimension of the first sealing element 5, effectively preventing the first sealing element 5 from inadvertently slipping along the axial direction.

[0044] In certain embodiments, as shown in [Fig. 2], the first assembly hole comprises a first hole section 31 and a second hole section 32, the opening of the first hole section 31 is larger than the opening of the second hole section 32, and the surface of the inner wall of the first hole section 31 is connected to the surface of the inner wall of the second hole section 32 by a third shoulder 33. The first sealing element 5 and the outer ring 41 are inserted into the first hole section 31, and the second sealing element 6 is inserted into the second hole section 32.

[0045] When the connection between the drive shaft 2 and the rim mounting seat 1 is loose, the bearing 4 is effectively prevented from sliding along the direction from the first hole section 31 to the second hole section 32 or even from falling from the rim mounting seat 1 below the limit of the third shoulder 33, and thus the structural stability of the wheel assembly is further increased.

[0046] In certain embodiments, as shown in [Fig. 2], the surface of the inner wall of the first hole section 31 is provided with an annular groove 311, and the wheel assembly further includes a retaining ring (not shown in the figures), a portion of the retaining ring being inserted into the annular groove 311, and the other portion of the retaining ring being located between the first sealing element 5 and the outer ring 4L

[0047] The retaining ring and the third shoulder 33 of the support 3 are respectively abutted against the two opposite sides of the outer ring 41 along the axial direction of the outer ring 41, thus ensuring the relative fixing of the bearing 4 and the support 3 in the axial direction of the bearing 4, further ensuring the relative fixing of the support 3, the bearing 4, the drive shaft 2 and the rim mounting seat 1 in the axial direction of the bearing 4, and thus reinforcing the structural stability of the wheel assembly.

[0048] An all-terrain vehicle according to an embodiment of the present invention comprises the wheel assembly according to one of the above embodiments.

[0049] The technical advantages of the all-terrain vehicle according to the embodiments of the present invention are the same as the technical advantages of the wheel assembly of the above embodiments, which will not be repeated here.

[0050] In the description of the present invention, it shall be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "up", "down", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial" and "circumferential" and the like, is based on the orientation or positional relationship illustrated in the drawings accompanying the present invention, which is only for the convenience of describing the present invention and for the simplification of the description, and does not indicate or imply that the device or element mentioned must have a specific orientation, and be constructed and used in a specific orientation, so that it cannot be understood as a limitation of the present invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and shall not be construed as indicating or implying relative importance or implicitly indicating the number of technical features specified. Therefore, the feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc.

[0052] In the present invention, unless expressly defined otherwise, terms such as "install," "interconnect," "connect," and "fix" are to be understood in a broad sense and may refer, for example, to fixed connections, removable connections, or integral connections; they may also refer to mechanical or electrical connections or intercommunications; they may also refer to direct connections or indirect connections via intermediate media; they may also refer to internal communications or interactions between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

[0053] In the present invention, unless expressly defined and specified, a structure in which a first feature is "on" or "below" a second feature may include an embodiment in which the first feature is in direct contact with the second feature, or may further include an embodiment in which the first and second features are in indirect contact via an intermediate element. Furthermore, a first feature "on", "above", or "on top" of a second feature may include an embodiment in which the first a first feature is straight or obliquely "on", "above" or "on top" of the second feature, or simply means that the first feature is at a greater height than the second feature, while a first feature "below", "under" or "down" of a second feature may include an realization in which the first feature is straight or obliquely "below", "under" or "down" of the second feature, or simply means that the first feature is at a lower height than the second feature.

[0054] In the description of the present invention, terms such as "an embodiment," "certain embodiments," "an example," "a specific example," or "certain examples" mean that a feature, structure, material, or particularity described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. Thus, the occurrence of these terms at various points in this specification does not necessarily refer to the same embodiment or example of the present invention. Furthermore, the particular features, structures, materials, or traits may be combined in any way in one or more embodiments or examples.Furthermore, without contradiction, persons skilled in the art may combine and unite different embodiments or examples or features of the different embodiments or examples described in this specification.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are illustrative and should not be understood as a limitation of the present invention, and that changes, modifications, alternatives and variations may be made to the above embodiments within the scope of the present invention by persons qualified in art.

Claims

Demands

1. A wheel assembly comprising a rim mounting seat (1), a drive shaft (2) and a support (3), wherein the rim mounting seat and the drive shaft are coaxially connected, and the support (3) has a first mounting hole, and at least a portion of the drive shaft (2) and the rim mounting seat are disposed in the first mounting hole; and a bearing (4), a first sealing element (5) and a second sealing element (6), wherein the first sealing element (5), the bearing (4) and the second sealing element (6) are disposed successively along an axial direction of the drive shaft; the first sealing element (5) and the bearing (4) are both press-fitted between an outer peripheral surface of the rim mounting seat (1) and an inner wall surface of the first mounting hole;and the second sealing element (6) is mounted tightly between an outer peripheral surface of the drive shaft and the inner wall surface of the first assembly hole.

2. Wheel assembly according to claim 1, wherein the first sealing element (5) and the second sealing element (6) comprise a lip seal or a sealing ring.

3. Wheel assembly according to claim 1, wherein the support (3) comprises a front spindle or a rear wheel bearing seat.

4. A wheel assembly according to claim 1, wherein the bearing comprises an inner ring (42), an outer ring (41), a third sealing element (44), a fourth sealing element (45), and a rolling element (43), wherein the rolling element (43) is mounted in contact between an outer peripheral surface of the inner ring (42) and an inner peripheral surface of the outer ring (41); the third sealing element (44) and the fourth sealing element (45) are both installed between the outer peripheral surface of the inner ring (42) and the inner peripheral surface of the outer ring (41); and the third sealing element (44) and the fourth sealing element (45) are located on either side of the bearing element in an axial direction of the inner ring (42).

5. Wheel assembly according to claim 4, wherein the third (44) and fourth (45) sealing element are made of a sealing ring or a dust cover.

6. Wheel assembly according to claim 4, wherein the outer peripheral surface of the rim mounting seat (1) comprises a first peripheral surface (11) and a second peripheral surface (12); wherein a diameter of the first peripheral surface (11) is larger than a diameter of the second peripheral surface (12), the first peripheral surface (11) being separated from the second peripheral surface (12) by a first shoulder (13), the first sealing element (5) being fitted onto the first peripheral surface (11), and the inner ring (42) being fitted onto the second peripheral surface (12); and the drive shaft (2) has a second shoulder (23) opposite the first shoulder (13), and the inner ring (42) is situated between the first shoulder (13) and the second shoulder (23).

7. Wheel assembly according to claim 6, wherein the second shoulder (23) divides the drive shaft (2) into a first shaft section (21) and a second shaft section (22), and the second sealing element (6) is fitted onto an outer peripheral surface of the first shaft section (21); and the wheel assembly further comprises a locking piece (7), the rim mounting seat (1) has a second mounting hole, and the second shaft section (22) passes through the second mounting hole and is connected to the locking piece (7).

8. Wheel assembly according to claim 4, wherein the first assembly hole comprises a first hole section (31) and a second hole section (32), an opening in the first hole section (31) being larger than an opening in the second hole section (32), and an inner wall surface in the first hole section (31) passing to an inner wall surface in the second hole section (32) via a third shoulder (33); and the first sealing element (5) and the outer ring (41) both being mounted in the first hole section (31), and the second sealing element (6) being mounted in the second hole section (32).

9. Wheel assembly according to claim 8, wherein the inner wall surface of the first hole section (31) has an annular groove (311), and the wheel assembly further comprises a retaining ring, a portion of the retaining ring being mounted in the annular groove (311), and another portion of the retaining ring being situated between the first sealing element (5) and the outer ring (41).

10. All-terrain vehicle comprising the wheel assembly according to any one of claims 1 to 9.

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