Wheel assembly and all-terrain vehicle

Abstract

The utility model discloses a wheel assembly and all terrain vehicle, the wheel assembly includes rim mounting base, drive axle, support piece, bearing, first sealing piece and second sealing piece, rim mounting base and drive axle coaxial connection, support piece is equipped with first assembly hole, rim mounting base and drive axle at least part are arranged in the first assembly hole, bearing is equipped with second assembly hole, the second assembly hole is equipped with second assembly hole, the second assembly hole is equipped with second assembly hole. The first sealing piece, the bearing and the second sealing piece are sequentially arranged in the axial direction of the driving shaft, the first sealing piece and the bearing are both in interference fit between the peripheral face of the rim mounting base and the inner wall face of the first assembling hole, and the second sealing piece is in interference fit between the peripheral face of the driving shaft and the inner wall face of the first assembling hole. The wheel assembly has the advantages that the sealing effect on the bearing is good, and the service life of the bearing is long.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a wheel assembly and an all-terrain vehicle. Background Art

[0002] The wheels of a vehicle mainly bear the load through the front steering knuckle or the rear wheel bearing seat and transmit the torque through the wheel hub to realize the function of wheel rotation, wherein the front steering knuckle or the rear wheel bearing is rotatably connected to the rim mounting seat and the driving wheel through the bearing. However, in the wheel assembly of the related art, the bearing is usually exposed. When the site environment is harsh, such as when the wheel assembly is used in an all-terrain vehicle, foreign debris is easy to enter the bearing and aggravate the bearing wear and failure, resulting in a short service life of the bearing. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the utility model provides a wheel assembly, which has the advantages of good sealing effect on the bearing and long service life of the bearing.

[0005] The embodiment of the utility model also provides an all-terrain vehicle.

[0006] The wheel assembly of the embodiment of the utility model includes a rim mounting seat, a drive shaft, a support member, a bearing, a first seal and a second seal. The rim mounting seat and the drive shaft are coaxially connected, the support member is provided with a first assembly hole, and the rim mounting seat and at least part of the drive shaft are arranged in the first assembly hole; the first seal, the bearing and the second seal are arranged in sequence along the axial direction of the drive shaft, the first seal and the bearing are both interference fit between the outer peripheral surface of the rim mounting seat and the inner wall surface of the first assembly hole, and the second seal is interference fit between the outer peripheral surface of the drive shaft and the inner wall surface of the first assembly hole.

[0007] According to the wheel assembly of the embodiment of the utility model, the support is rotatably connected to each of the rim mounting seat and the drive shaft through the bearing, wherein the first seal is interference-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 the second seal is interference-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 seal and the second seal are respectively located on both sides of the bearing in its axial direction. At this time, the first seal and the second seal separate the bearing from the outside world, and it is more difficult for foreign impurities to enter the bearing, which effectively reduces the risk of bearing wear failure and increases the service life of the bearing.

[0008] In some embodiments, the first seal and the second seal include oil seals or sealing rings.

[0009] In some embodiments, the support member comprises a front steering knuckle or a rear wheel bearing seat.

[0010] In some embodiments, the bearing includes an inner ring, an outer ring, a third seal, a fourth seal and a rolling body, the rolling body rolling fits between the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring, the third seal and the fourth seal are both fitted between the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring, and the third seal and the fourth seal are located on both sides of the axial direction of the inner ring of the rolling body.

[0011] In some embodiments, the third seal and the fourth seal include sealing rings or dust covers.

[0012] In some embodiments, the outer peripheral surface of the rim mounting seat includes a first peripheral surface and a second peripheral surface, the diameter of the first peripheral surface is greater than the diameter of the second peripheral surface, the first peripheral surface is connected with the second peripheral surface through a first step surface, the first sealing member is sleeved on the first peripheral surface, and the inner ring is sleeved on the second peripheral surface;

[0013] The driving shaft has a second step surface opposite to the first step surface, and the inner ring is located between the first step surface and the second step surface.

[0014] In some embodiments, the second step surface divides the drive shaft into a first shaft section and a second shaft section, and the second sealing member is sleeved on the outer circumferential surface of the first shaft section;

[0015] The wheel assembly also includes a locking piece, the rim mounting seat is provided with a second assembly hole, and the second shaft section passes through the second assembly hole and is connected to the locking piece.

[0016] In some embodiments, the first assembly hole includes a first hole segment and a second hole segment, the hole diameter of the first hole segment is larger than the hole diameter of the second hole segment, and the inner wall surface of the first hole segment is connected with the inner wall surface of the second hole segment through a third step surface;

[0017] The first sealing member and the outer ring are both fitted in the first hole section, and the second sealing member is fitted in the second hole section.

[0018] In some embodiments, an inner wall surface of the first hole segment is provided with an annular groove, and the wheel assembly further comprises a retaining ring, a portion of which fits in the annular groove, and another portion of which is located between the first seal and the outer ring.

[0019] The all-terrain vehicle according to the embodiment of the utility model comprises the wheel assembly as described in any one of the above embodiments.

[0020] The technical advantages of the all-terrain vehicle according to the embodiment of the utility model are the same as the technical advantages of the wheel assembly of the above-mentioned embodiment, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a wheel assembly according to an embodiment of the utility model.

[0022] Figure 2 It is a partial enlarged view of the wheel assembly according to an embodiment of the utility model.

[0023] Reference numerals:

[0024] 1. Rim mounting seat; 11. First circumferential surface; 12. Second circumferential surface; 13. First step surface; 2. Drive shaft; 21. First shaft section; 22. Second shaft section; 23. Second step surface; 3. Support member; 31. First hole section; 311. Annular groove; 32. Second hole section; 33. Third step surface; 4. Bearing; 41. Outer ring; 42. Inner ring; 43. Rolling element; 44. Third seal; 45. Fourth seal; 5. First seal; 6. Second seal; 7. Locking member. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0026] Combine the following Figure 1 and Figure 2 A wheel assembly according to an embodiment of the present invention is described.

[0027] The wheel assembly of the embodiment of the utility model comprises a rim mounting seat 1, a drive shaft 2, a support member 3, a bearing 4, a first seal 5 and a second seal 6. The rim mounting seat 1 and the drive shaft 2 are coaxially connected, the support member 3 is provided with a first assembly hole, and at least part of the rim mounting seat 1 and the drive shaft 2 are arranged in the first assembly hole. The first seal 5, the bearing 4 and the second seal 6 are arranged in sequence along the axial direction of the drive shaft 2, the first seal 5 and the bearing 4 are both interference-fitted between the outer peripheral surface of the rim mounting seat 1 and the inner wall surface of the first assembly hole, and the second seal 6 is interference-fitted between the outer peripheral surface of the drive shaft 2 and the inner wall surface of the first assembly hole.

[0028] According to the wheel assembly of the embodiment of the utility model, the support member 3 is rotatably connected to each of the rim mounting seat 1 and the drive shaft 2 through the bearing 4, wherein the first seal 5 is interference-fitted between the outer peripheral surface of the rim mounting seat 1 and the inner wall surface of the first assembly hole in the support member 3, and the second seal 6 is interference-fitted between the outer peripheral surface of the drive shaft 2 and the inner wall surface of the first assembly hole in the support member 3, and the first seal 5 and the second seal 6 are respectively located on both sides of the bearing 4 in its axial direction. At this time, the first seal 5 and the second seal 6 separate the bearing 4 from the outside world, and it is more difficult for foreign impurities to enter the inside of the bearing 4, which effectively reduces the risk of wear and failure of the bearing 4, and the service life of the bearing 4 is longer.

[0029] It should be noted that the outer peripheral surface of each of the rim mounting seat 1 and the drive shaft 2 and the inner wall surface of the first assembly hole in the support member 3 jointly define an annular chamber with openings at both ends. The first seal 5, the bearing 4 and the second seal 6 are all fitted in the annular chamber, and the first seal 5 and the second seal 6 are respectively adjacent to the two end openings of the annular chamber.

[0030] In some embodiments, the first sealing member 5 and the second sealing member 6 include oil seals or sealing rings, wherein the sealing rings are O-rings.

[0031] That is, the first seal 5 and the second seal 6 can both be oil seals, both can be sealing rings, or can be oil seals and sealing rings respectively. The oil seal and sealing ring with interference fit can stably and reliably seal the cavities on both sides of the bearing 4 when the support member 3 rotates relative to the rim mounting seat 1 and the drive shaft 2, and the probability of impurities accidentally entering the bearing 4 is lower.

[0032] Specifically, Figure 1 and Figure 2 As shown, the first sealing member 5 and the second sealing member 6 are both oil seals.

[0033] In some embodiments, the support member 3 comprises a front steering knuckle or a rear wheel bearing seat.

[0034] The support member 3 can be a front steering knuckle, so that the wheel assembly can be used as the front wheel of a vehicle such as an all-terrain vehicle, and 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. As a result, the application range of the wheel assembly of this embodiment is wider, and all wheels of the all-terrain vehicle can apply the wheel assembly of this embodiment, so that all wheels of the all-terrain vehicle have higher rotational stability and stronger adaptability to harsh environments.

[0035] In some embodiments, Figure 2As shown, the bearing 4 includes an inner ring 42, an outer ring 41, a third seal 44, a fourth seal 45 and a rolling element 43. The rolling element 43 is rolling-fitted between the outer circumference of the inner ring 42 and the inner circumference of the outer ring 41, the third seal 44 and the fourth seal 45 are both fitted between the outer circumference of the inner ring 42 and the inner circumference of the outer ring 41, and the third seal 44 and the fourth seal 45 are located on both sides of the rolling element 43 in the axial direction of the inner ring 42.

[0036] Therefore, when foreign impurities mistakenly pass through the first seal 5 and the second seal 6, the third seal 44 and the fourth seal 45 will further prevent the impurities from entering the area where the rolling element 43 is located. The above-mentioned secondary sealing method further prevents the impurities from affecting the rolling of the rolling element 43 relative to the inner ring 42 and the outer ring 41. The rolling element 43 is less likely to wear when rolling relative to the inner ring 42 and the outer ring 41, and the service life of the bearing 4 is increased.

[0037] Specifically, a third seal 44 and a first seal 5 are sequentially disposed on one side of the rolling body 43 , and a fourth seal 45 and a second seal 6 are sequentially disposed on the other side of the rolling body 43 .

[0038] In some embodiments, the third seal 44 and the fourth seal 45 include sealing rings or dust covers.

[0039] The sealing ring and the dust cover can effectively prevent foreign matter from entering the area where the rolling element 43 is located, effectively reduce the wear rate of the rolling element 43, the inner ring 42 and the outer ring 41, and the service life of the bearing 4 is long.

[0040] In some embodiments, Figure 1 and Figure 2 As shown, the outer circumference of the rim mounting seat 1 includes a first circumferential surface 11 and a second circumferential surface 12, the diameter of the first circumferential surface 11 is larger than the diameter of the second circumferential surface 12, the first circumferential surface 11 is connected with the second circumferential surface 12 through a first step surface 13, the first sealing member 5 is sleeved on the first circumferential surface 11, and the inner ring 42 is sleeved on the second circumferential surface 12. The drive shaft 2 has a second step surface 23 opposite to the first step surface 13, and the inner ring 42 is located between the first step surface 13 and the second step surface 23.

[0041] That is, after the drive shaft 2 is connected to the rim mounting seat 1, the inner ring 42 of the bearing 4 is clamped between the first step surface 13 and the second step surface 23, thereby realizing the relative fixation of the bearing 4, the drive shaft 2 and the rim mounting seat 1 in the axial direction of the bearing 4. When the drive shaft 2 and the rim mounting seat 1 are stably connected, the bearing 4 is not prone to axial shaking or even falling out, thereby effectively ensuring the function of the bearing 4.

[0042] Specifically, the radial dimensions of the first step surface 13 and the second step surface 23 on the drive shaft 2 are less than or equal to the radial dimension (thickness) of the inner ring 42 . After the drive shaft 2 is connected to the rim mounting seat 1 , the inner ring 42 is pressed between the first step surface 13 and the second step surface 23 .

[0043] In some embodiments, Figure 2 As shown, the second stepped surface 23 divides the drive shaft 2 into a first shaft section 21 and a second shaft section 22, and the second sealing member 6 is sleeved on the outer circumference of the first shaft section 21. The wheel assembly also includes a locking member 7, and the rim mounting seat 1 is provided with a second assembly hole, and the second shaft section 22 passes through the second assembly hole and is connected to the locking member 7.

[0044] The second shaft section 22 passes through the second assembly hole and is connected to the locking member 7, so that the drive shaft 2 and the rim mounting seat 1 are coaxially connected, and the axial position of the bearing 4 is limited, and the disassembly and assembly of the wheel assembly is convenient and reliable.

[0045] Specifically, the locking member 7 can be a locking nut, and the second shaft segment 22 is provided with an external thread. After the portion of the second shaft segment 22 provided with the external thread passes through the second assembly hole, the locking nut is threadably engaged with the external thread. In this case, the locking member 7 can also include a latch, and in this case, a plug hole is provided on the outer peripheral surface of the second shaft segment 22, the plug hole is located on the side of the locking thread away from the first shaft segment 21, and the plug hole extends along the radial direction of the second shaft segment 22, a part of the latch is engaged in the plug hole, and the rest of the latch abuts against the side of the locking nut away from the rim mounting seat 1.

[0046] It should be noted that a limiting step may be provided at one end of the first shaft section 21 away from the second shaft section 22, the limiting step being adjacent to the second seal 6, and the distance between the limiting step and the second seal 6 being smaller than the axial dimension of the second seal 6, thereby effectively preventing the second seal 6 from sliding axially and falling off accidentally. In addition, the portion of the rim except the rim mounting seat 1 is located on the side of the first seal 5 away from the bearing 4 and adjacent to the first seal 5, and the distance between the portion and the first seal 5 is smaller than the axial dimension of the first seal 5, thereby effectively preventing the first seal 5 from sliding axially and falling off accidentally.

[0047] In some embodiments, Figure 2 As shown, the first assembly hole includes a first hole section 31 and a second hole section 32. The aperture of the first hole section 31 is larger than that of the second hole section 32. The inner wall surface of the first hole section 31 is connected with the inner wall surface of the second hole section 32 through the third step surface 33. The first sealing member 5 and the outer ring 41 are both fitted in the first hole section 31, and the second sealing member 6 is fitted in the second hole section 32.

[0048] When the connection between the drive shaft 2 and the rim mounting seat 1 is loose, the third step surface 33 is limited to effectively prevent the bearing 4 from sliding along the first hole section 31 toward the second hole section 32 or even falling off the rim mounting seat 1, and the structural stability of the wheel assembly is stronger.

[0049] In some embodiments, Figure 2 As shown, the inner wall surface of the first hole section 31 is provided with an annular groove 311 , and the wheel assembly also includes a retaining ring (not shown in the figure), a part of the retaining ring is fitted in the annular groove 311 , and the other part of the retaining ring is located between the first seal 5 and the outer ring 41 .

[0050] The third step surfaces 33 of the retaining ring and the support member 3 are respectively in contact with the two axially opposite side surfaces of the outer ring 41, thereby ensuring the relative fixation of the bearing 4 and the support member 3 in the axial direction of the bearing 4, and further ensuring the relative fixation of the support member 3, the bearing 4, the drive shaft 2 and the rim mounting seat 1 in the axial direction of the bearing 4, and the structural stability of the wheel assembly is stronger.

[0051] An all-terrain vehicle according to an embodiment of the present utility model includes a wheel assembly as described in any of the above embodiments.

[0052] The technical advantages of the all-terrain vehicle according to the embodiment of the utility model are the same as the technical advantages of the wheel assembly of the above-mentioned embodiment, which will not be repeated here.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0058] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A wheel assembly, characterized in that: include: A rim mounting seat, a drive shaft and a support member, wherein the rim mounting seat and the drive shaft are coaxially connected, the support member is provided with a first assembly hole, and at least a portion of the rim mounting seat and the drive shaft are arranged in the first assembly hole; as well as A bearing, a first seal and a second seal, wherein the first seal, the bearing and the second seal are arranged in sequence along the axial direction of the drive shaft, the first seal and the bearing are both interference fit between the outer circumferential surface of the rim mounting seat and the inner wall surface of the first assembly hole, and the second seal is interference fit between the outer circumferential surface of the drive shaft and the inner wall surface of the first assembly hole.

2. The wheel assembly according to claim 1, characterized in that: The first sealing member and the second sealing member include oil seals or sealing rings.

3. The wheel assembly according to claim 1, characterized in that: The support member includes a front steering knuckle or a rear wheel bearing seat.

4. The wheel assembly according to claim 1, characterized in that: The bearing includes an inner ring, an outer ring, a third seal, a fourth seal and a rolling body. The rolling body is rollingly fitted between the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring. The third seal and the fourth seal are both fitted between the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring. The third seal and the fourth seal are located on both sides of the rolling body in the axial direction of the inner ring.

5. The wheel assembly according to claim 4, characterized in that: The third sealing member and the fourth sealing member include sealing rings or dust covers.

6. The wheel assembly according to claim 4, characterized in that: The outer peripheral surface of the rim mounting seat includes a first peripheral surface and a second peripheral surface, the diameter of the first peripheral surface is greater than the diameter of the second peripheral surface, the first peripheral surface is connected with the second peripheral surface through a first step surface, the first sealing member is sleeved on the first peripheral surface, and the inner ring is sleeved on the second peripheral surface; The driving shaft has a second step surface opposite to the first step surface, and the inner ring is located between the first step surface and the second step surface.

7. The wheel assembly according to claim 6, characterized in that: The second step surface divides the drive shaft into a first shaft section and a second shaft section, and the second sealing member is sleeved on the outer peripheral surface of the first shaft section; The wheel assembly also includes a locking piece, the rim mounting seat is provided with a second assembly hole, and the second shaft section passes through the second assembly hole and is connected to the locking piece.

8. The wheel assembly according to claim 4, characterized in that: The first assembly hole comprises a first hole section and a second hole section, the hole diameter of the first hole section is larger than the hole diameter of the second hole section, and the inner wall surface of the first hole section is connected with the inner wall surface of the second hole section through a third step surface; The first sealing member and the outer ring are both fitted in the first hole section, and the second sealing member is fitted in the second hole section.

9. The wheel assembly according to claim 8, characterized in that: An annular groove is provided on the inner wall surface of the first hole segment. The wheel assembly further comprises a retaining ring, a portion of which fits in the annular groove, and another portion of which is located between the first sealing member and the outer ring.

10. An all-terrain vehicle, characterized in that: Comprising a wheel assembly according to any one of claims 1-9.

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