Rear axle shaft for all-terrain vehicle
By setting a slot and limiting parts in the middle of the shaft body of the rear axle shaft of the all-terrain vehicle, the axial limit of the bearing is solved, and the problems of waste of raw materials and high production costs caused by processing shoulders in the prior art are reduced, Production costs and improve maintenance convenience.
Patent Information
- Application Number
- CN202420976682.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-08
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-05-08
AI Technical Summary
The existing all-terrain vehicle rear axle axle axle problems that lead to waste of raw materials and increased production costs when machining shoulders to achieve bearing positioning.
The design of setting a slot and a limiting member in the middle of the shaft body is adopted. The axial limit is achieved through the abutment between the limiting member and the bearing, which avoids direct processing of the shoulders on the shaft body, thereby reducing production costs and simplifying the maintenance process.
It effectively reduces production costs, avoids waste of raw materials, and improves the maintenance convenience of the rear axle shaft, while ensuring the normal limit and reliability of the bearings.
Smart Images
Figure CN222136355U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of machinery and relates to a rear axle shaft for an all-terrain vehicle. Background Art
[0002] An all-terrain vehicle (commonly known as a beach vehicle) refers to a vehicle that can travel on any terrain and can travel freely on terrain that is difficult for ordinary vehicles to travel. The rear axle assembly is an indispensable device on an all-terrain vehicle. The rear axle assembly includes a rear axle shaft, a rear axle body, a brake disc and a sprocket. The brake disc and the sprocket are respectively fixed on the brake disc support and the sprocket support, and the brake disc support and the sprocket support are respectively connected to the rear axle shaft through splines. The rear axle body is supported in the middle of the rear axle shaft by two bearings. The brake disc support and the sprocket support are axially positioned on the rear axle shaft and are located on both sides of the rear axle body. When the whole vehicle is assembled, the rear axle body is connected to the rear end of the flat fork, the sprocket is connected to the output end sprocket of the engine through a chain, and the brake disc cooperates with the brake caliper of the brake system. In addition, the two ends of the rear axle shaft are also respectively installed with fixed rear wheel seats, and the rear wheel seats are used to install and connect the rear wheels.
[0003] In the existing rear axle assembly, two bosses are directly machined on the rear axle shaft, one of the bearings is axially positioned by abutting against one of the bosses and the brake disc support, while the other bearing is axially positioned by abutting against the other boss and the sprocket support. However, in practice, there are very high requirements for the mechanical properties of the rear axle shaft, so the rear axle shaft is usually made of more special materials. In this way, the method of machining two bosses on the rear axle shaft will obviously cause a waste of raw materials and increase production costs. Utility Model Content
[0004] The utility model aims to solve the above problems existing in the prior art, proposes a rear axle shaft for an all-terrain vehicle, and solves the problem of high production cost.
[0005] The purpose of the utility model can be achieved through the following technical solutions:
[0006] A rear axle shaft for an all-terrain vehicle comprises a shaft body, wherein the middle portion of the shaft body has a first external spline section, a first bearing mounting section, a second bearing mounting section and a second external spline section in sequence along the axial direction, and is characterized in that the middle portion of the shaft body has two annular grooves between the first bearing mounting section and the second bearing mounting section, wherein one groove is arranged adjacent to the first bearing mounting section, and the other groove is arranged adjacent to the second bearing mounting section, and shaft retaining rings are arranged in both grooves, and the outer edges of the shaft retaining rings extend out of the grooves, and limiting members are sleeved on the first bearing mounting section and the second bearing mounting section, and the opposite sides of the two limiting members respectively abut against the corresponding shaft retaining rings.
[0007] When in use, bearings are installed on the first bearing installation section and the second bearing installation section respectively, and the two bearings are respectively against the two limiting pieces. Finally, the brake disc support is installed on the first external spline section and the sprocket support is installed on the second spline section. The brake disc support cooperates with the corresponding limiting piece to form an axial limit for the bearing installed on the first bearing installation section, and the sprocket support cooperates with the corresponding limiting piece to form an axial limit for the bearing installed on the second bearing installation section. The rear axle shaft used in this all-terrain vehicle limits the bearing by setting a limiting piece. Compared with directly machining a boss for limiting on the shaft body, the limiting piece can be selected and produced separately, and at the same time, it also avoids the waste of raw materials caused by machining the boss on the shaft body, thereby reducing the production cost while ensuring the normal limit of the bearing. In addition, such a structure is also more convenient for subsequent maintenance.
[0008] In the above-mentioned rear axle shaft for the all-terrain vehicle, the limiting member is in the shape of a circular sleeve, and the two limiting members have abutment surfaces on the opposite sides thereof.
[0009] The limiting member is in the shape of a circular sleeve, and the opposite sides of the two limiting members both have abutment surfaces, which can increase the contact area between the limiting member and the bearing, thereby ensuring the limiting effect.
[0010] In the above-mentioned rear axle shaft for the all-terrain vehicle, the limiting member is a steel member.
[0011] The limiter is made of steel, which means that the limiter is also guaranteed in strength, ensuring the reliability of use.
[0012] In the above-mentioned rear axle shaft for the all-terrain vehicle, both ends of the shaft body have connecting sections, and the connecting sections sequentially include a third threaded section and a third external spline section. The end of the third threaded section is protruding with a boss, and a through socket is provided on the side of the boss, and the socket is a cross-shaped hole.
[0013] The third outer spline section is used to install the rear wheel seat, and the third thread section is used to thread the limit nut. The socket is used to insert the pin. In practice, a groove is provided on the limit nut. After the pin is inserted into the socket, it will be partially located in the groove to prevent the limit nut from rotating. The socket is set as a cross-shaped hole so that the pin can be inserted according to the actual position of the groove on the limit nut.
[0014] Compared with the prior art, the rear axle shaft of the all-terrain vehicle limits the bearing by setting a combination of a limit piece and a shaft retaining ring. The limit piece can be selected and produced separately, and the waste of raw materials caused by processing the boss on the shaft body is avoided. Therefore, the normal limit of the bearing is ensured while reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 yes Figure 1It is a schematic diagram of a rear axle shaft used in the all-terrain vehicle.
[0016] Figure 2 yes Figure 1 A partial enlarged view of the middle position of the central axis.
[0017] Figure 3 It is a cross-sectional view of the convex head.
[0018] In the figure, 1, shaft body; 1a, first threaded section; 1b, first external spline section; 1c, first bearing mounting section; 1d, second bearing mounting section; 1e, second external spline section; 1f, second threaded section; 1g, connecting section; 1g1, third threaded section; 1g2, third external spline section; 1g3, boss; 1g31, socket; 1h, transition section; 1h1, shoulder; 1i, slot; 2, shaft retaining ring; 3, limit member; 3a, abutment surface. DETAILED DESCRIPTION
[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0020] like Figure 1 , Figure 2 and Figure 3 As shown, the rear axle shaft for an all-terrain vehicle includes a long rod-shaped shaft body 1, and the middle part of the shaft body 1 has a first threaded section 1a, a first external spline section 1b, a first bearing installation section 1c, a second bearing installation section 1d, a second external spline section 1e and a second threaded section 1f in sequence, wherein the first threaded section 1a and the second threaded section 1f are both used for threaded connection with a locking nut, the first external spline section 1b is used for installing a brake disc support, the second external spline section 1e is used for installing a sprocket support, and the first bearing installation section 1c and the second bearing installation section 1d are both used for installing bearings. Both ends of the shaft body 1 have a connecting section 1g, and the connecting section 1g includes a third threaded section 1g1 and a third external spline section 1g2 in sequence, wherein the third external spline section 1g2 is used for installing a rear wheel seat, and the third threaded section 1g1 is used for threaded connection with a limit nut. The end of the third threaded section 1g1 is provided with a protruding head 1g3, and the side of the protruding head 1g3 is provided with a through plug hole 1g31, which is a cross-shaped hole and is used to insert a plug. In practice, a groove is provided on the limit nut, and the plug will be partially located in the groove after being inserted into the plug hole 1g31, thereby preventing the limit nut from rotating. In this embodiment, the shaft body 1 also has two transition sections 1h, one of which is connected between one of the connecting sections 1g and the first threaded section 1a, and the other is connected between the other connecting section 1g and the second threaded section 1f. The two transition sections 1h have a shoulder 1h1 at one end close to the connected connecting section 1g, and the rear wheel seat sleeve abuts against the shoulder 1h1 after the third external spline section 1g2.
[0021] Furthermore, if Figure 1 and Figure 2 As shown, the middle part of the shaft body 1 has two annular grooves 1i between the first bearing mounting section 1c and the second bearing mounting section 1d, one of the grooves 1i is arranged adjacent to the first bearing mounting section 1c, and the other groove 1i is arranged adjacent to the second bearing mounting section 1d. Shaft retaining rings 2 are arranged in both grooves 1i, and the outer edges of the shaft retaining rings 2 extend out of the grooves 1i. The first bearing mounting section 1c and the second bearing mounting section 1d are sleeved with stoppers 3, and the opposite sides of the two stoppers 3 are respectively against the corresponding shaft retaining rings 2. The stoppers 3 are in the shape of a circular sleeve, and the opposite sides of the two stoppers 3 have abutting surfaces 3a. The stoppers 3 are steel parts.
[0022] When in use, bearings are installed on the first bearing installation section 1c and the second bearing installation section respectively, and the two bearings are respectively abutted against the abutment surfaces 3a of the two limiting members 3. Finally, the brake disc support is installed on the first external spline section 1b and the sprocket support is installed on the second spline section. The brake disc support cooperates with the corresponding limiting member 3 to form an axial limit for the bearing installed on the first bearing installation section 1c, and the sprocket support cooperates with the corresponding limiting member 3 to form an axial limit for the bearing installed on the second bearing installation section 1d. The rear axle shaft used in this all-terrain vehicle limits the bearing by setting the limiting member 3. Compared with directly processing the boss for limiting on the shaft body 1, the limiting member 3 can be selected and produced separately, and the waste of raw materials caused by processing the boss on the shaft body 1 is also avoided. Therefore, the normal limiting of the bearing is ensured while reducing the production cost. In addition, such a structure is also more convenient for subsequent maintenance.
[0023] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. A rear axle shaft for an all-terrain vehicle, comprising a shaft body (1), wherein the middle portion of the shaft body (1) has a first external spline section (1b), a first bearing mounting section (1c), a second bearing mounting section (1d) and a second external spline section (1e) in sequence along the axial direction, characterized in that: The shaft body (1) has two annular grooves (1i) in the middle between the first bearing mounting section (1c) and the second bearing mounting section (1d), one of the grooves (1i) being arranged adjacent to the first bearing mounting section (1c), and the other groove (1i) being arranged adjacent to the second bearing mounting section (1d), both grooves (1i) being provided with shaft retaining rings (2), the outer edges of the shaft retaining rings (2) extending out of the grooves (1i), and both the first bearing mounting section (1c) and the second bearing mounting section (1d) being sleeved with limit members (3), and the opposite sides of the two limit members (3) respectively abut against the corresponding shaft retaining rings (2).
2. The rear axle shaft for an all-terrain vehicle according to claim 1, characterized in that: The limiting member (3) is in the shape of a circular sleeve, and the two limiting members (3) have abutment surfaces (3a) on the opposite sides thereof.
3. The rear axle shaft for an all-terrain vehicle according to claim 2, characterized in that: The limiting member (3) is a steel member.
4. The rear axle shaft for an all-terrain vehicle according to claim 1, 2 or 3, characterized in that: Both ends of the shaft body (1) are provided with connecting sections (1g), and the connecting sections (1g) sequentially include a third threaded section (1g1) and a third external spline section (1g2), and the end of the third threaded section (1g1) is provided with a protruding head (1g3), and the side of the protruding head (1g3) is provided with a through insertion hole (1g31), and the insertion hole (1g31) is a cross-shaped hole.