Spherical hinge joint and all-terrain vehicle swing arm

Abstract

The utility model discloses a spherical hinge node and all-terrain vehicle swing arm, including ball head rod and rod end body, ball head rod includes rod body and is provided the ball head of rod body end portion, the rod end body is provided with the installation cavity that is used for installing the ball head, install the wear-resistant plastic front ball seat and the wear-resistant plastic rear ball seat in the installation cavity, the wear-resistant plastic front ball seat and the wear-resistant plastic rear ball seat of split type structure. A front ball seat concave spherical surface and a rear ball seat concave spherical surface are respectively formed on the wear-resistant plastic front ball seat and the wear-resistant plastic rear ball seat, and the ball head is adaptively and movably arranged between the front ball seat concave spherical surface and the rear ball seat concave spherical surface. The front wear-resistant plastic ball seat and the rear wear-resistant plastic ball seat which are of a split type structure are matched with the ball head of the ball head rod, and the problem that due to the wear-resistant characteristic of the front wear-resistant plastic ball seat and the rear wear-resistant plastic ball seat, a spherical hinge joint is loose due to the fact that the ball seats are abraded after a product is used for a long time can be effectively solved; and the product can be kept in an allowable range for a long time.

Description

Technical Field

[0001] This utility model relates to the field of ball joint technology, specifically to a ball joint and an all-terrain vehicle swing arm. Background Technology

[0002] As attached Figure 3 The kingpin ball joint shown is a key connection point between the wheel steering knuckle and the vehicle body in an existing all-terrain vehicle control arm. It transfers the weight of the vehicle body to the wheel and coordinates with the steering tie rod to achieve wheel steering (the wheel rotates around the kingpin ball joint). Traditional kingpin ball joints feature an integrated polyoxymethylene (POM) ball seat within the rod end, with a "steel-to-POM" friction pair structure (i.e., the ball head is steel, and the ball seat is POM). While widely used, this design has the following drawbacks: 1. The product has strict requirements for torque. During production, torque is typically controlled by adjusting the interference fit and riveting force. However, some products exhibit torque deviations that affect product quality stability and reliability. 2. After a period of operation, the product is prone to loosening due to surface wear of the friction pair, leading to product failure. Furthermore, significant impacts during vehicle operation can cause brittle fracture of the POM, compromising driving safety. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a ball joint, which mainly solves the technical problem that existing ball joints using steel-to-polyoxymethylene structures are prone to loosening due to surface wear.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] A ball joint includes a ball head and a club end body. The ball head includes a club body and a ball head disposed at the end of the club body. A mounting cavity for mounting the ball head is formed on the club end body. A wear-resistant plastic front ball seat and a wear-resistant plastic rear ball seat with a split structure are installed in the mounting cavity. A concave spherical surface of the front ball seat and a concave spherical surface of the rear ball seat are formed on the wear-resistant plastic front ball seat and the rear ball seat respectively. The ball head is adapted to be movably installed between the concave spherical surfaces of the front ball seat and the rear ball seat.

[0006] Furthermore, the mounting cavity of the club end has a first opening and a second opening arranged opposite to each other. The club body is inserted from the first opening side and passes through the second opening side until the rear half of the ball head abuts against the concave spherical surface of the wear-resistant plastic rear ball seat. The wear-resistant plastic front ball seat is correspondingly installed at the front half of the ball head and its concave spherical surface abuts against the front half of the ball head. An end cap is installed on the first opening side of the mounting cavity, and an elastic element is provided between the end cap and the wear-resistant plastic front ball seat.

[0007] Further, the elastic member is a compression spring.

[0008] Further, the wear-resistant plastic front ball seat and the wear-resistant plastic rear ball seat are both PEEK or PCT engineering plastic material ball seat structures.

[0009] Further, an axial through hole is formed in the wear-resistant plastic front ball seat, and a joint for supplementing lubricating grease into the ball hinge node is arranged on the end cover.

[0010] Further, a sealing ring is arranged between the end cover and the inner wall of the mounting cavity.

[0011] Further, a sealing cover is arranged on the second opening side of the rod end body.

[0012] Further, a step limiting portion is formed on the inner wall of the second opening side of the mounting cavity, and the wear-resistant plastic rear ball seat abuts against the step limiting portion.

[0013] Based on the same inventive concept, the utility model also provides a full terrain vehicle swing arm which comprises the ball hinge node of any one of the above.

[0014] The above technical scheme has the following advantages or beneficial effects:

[0015] The ball hinge node and the full terrain vehicle swing arm have the following advantages: the wear-resistant plastic front ball seat and the wear-resistant plastic rear ball seat are matched with the ball head of the ball head rod, and the wear-resistant characteristics of the wear-resistant plastic front ball seat and the wear-resistant plastic rear ball seat can effectively improve the problem that the ball hinge node is loose due to long-term use and ball seat wear, and the product can be kept in the allowable range for a long time. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structure schematic view of the ball hinge node of the embodiment one of the utility model.

[0017] Figure 2 is a structure schematic view of the ball hinge node of the embodiment two of the utility model.

[0018] Figure 3 is a structure schematic view of the ball hinge node of the prior art.

[0019] REFERENCE SIGNS:

[0020] 1, ball head rod, 2, rod end body, 3, wear-resistant plastic front ball seat, 4, wear-resistant plastic rear ball seat, 5, end cover, 6, elastic member, 7, sealing ring, 8, sealing cover, 11, rod body, 12, ball head, 21, step limiting portion, 51, joint, 31, axial through hole. DETAILED DESCRIPTION

[0021] The utility model will be further described in combination with the drawings and embodiments.

[0022] In the description of the utility model, it needs to understand that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0023] Embodiment one

[0024] Please refer to the attached Figure 1 An embodiment of the utility model provides a ball hinge node, including ball head rod 1 and rod end body 2, ball head rod 1 includes rod body 11 and is located at the end of rod body 11 ball head 12, is set with the installation cavity for installing ball head 12 on rod end body 2, the split structure's wear-resistant plastic front ball seat 3 and wear-resistant plastic rear ball seat 4 are installed in the installation cavity, and the front ball seat concave spherical surface and rear ball seat concave spherical surface are formed on wear-resistant plastic front ball seat 3 and wear-resistant plastic rear ball seat 4 respectively, and ball head 12 is adaptively installed between the front ball seat concave spherical surface and rear ball seat concave spherical surface.It can be understood that, in the embodiment, the split structure's wear-resistant plastic front ball seat 3 and wear-resistant plastic rear ball seat 4 are matched with ball head 12 of ball head rod 1, and the wear-resistant properties of wear-resistant plastic front ball seat 3 and wear-resistant plastic rear ball seat 4 can effectively improve the problem that the ball hinge node is loose due to the wear of ball seat caused by long-term use, so that the product can be kept in the allowable range for a long time.

[0025] Further, the installation cavity of rod end body 2 has first opening and second opening oppositely arranged, the rod body 11 of ball head rod 1 is inserted from the first opening side and passes out from the second opening side until the rear half ball surface of ball head 12 abuts on the rear ball seat concave spherical surface of wear-resistant plastic rear ball seat 4, the wear-resistant plastic front ball seat 3 is installed at the front half of ball head 12 and the front ball seat concave spherical surface thereof abuts on the front half ball surface of ball head 12, one end cover 5 is installed at the first opening side of installation cavity, and the elastic member 6 is arranged between end cover 5 and wear-resistant plastic front ball seat 3.In the embodiment, since the ball seat structure is formed by the split wear-resistant plastic front ball seat 3 and wear-resistant plastic rear ball seat 4, and since the elastic member 6 is arranged between end cover 5 and wear-resistant plastic front ball seat 3, thus, by controlling the compression amount of elastic member 6 to change its elasticity, the contact pressure between wear-resistant plastic front ball seat 3 and ball head 12 is adjusted, so that the rotation torque of ball hinge node can be better controlled, and the stability and reliability of product quality can be improved.

[0026] Furthermore, the elastic element 6 is a compression spring. However, those skilled in the art should understand that in other embodiments, the elastic element 6 may also be other types of spring structures, and is not limited to the specific implementation disclosed in this embodiment, as long as the wear-resistant plastic front ball seat 3 can be elastically pressed against the ball head 12 by means of the elastic force of the elastic element 6.

[0027] Furthermore, both the wear-resistant plastic front ball joint 3 and the wear-resistant plastic rear ball joint 4 are ball joint structures made of PEEK or PCT engineering plastics. In this embodiment, the ball joint structure made of PEEK or PCT materials has superior wear resistance compared to existing polyoxymethylene ball joints. During long-term use, it experiences less wear and a slower reduction in torque, allowing the torque to remain within the allowable range for an extended period. In addition, PEEK or PCT materials have better toughness than polyoxymethylene, giving the product excellent impact resistance and better meeting the harsh impact conditions of all-terrain vehicles.

[0028] Furthermore, an axial through hole 31 is provided on the wear-resistant plastic front ball seat 3.

[0029] Furthermore, a sealing ring 7 is provided between the end cap 5 and the inner wall of the mounting cavity. In this embodiment, by providing a sealing ring 7 between the end cap 5 and the inner wall of the mounting cavity, the lubricating grease inside the ball joint can be effectively prevented from leaking out from the end cap 5, thus avoiding oil leakage problems in the product.

[0030] Furthermore, a sealing cover 8 is installed on the second opening side of the rod end body 2.

[0031] Furthermore, a stepped limiting part 21 is formed on the inner wall of the second opening side of the mounting cavity, and the wear-resistant plastic rear ball seat 4 abuts against the stepped limiting part 21.

[0032] Please refer to the appendix. Figure 1 An embodiment of this utility model also provides an all-terrain vehicle swing arm, including any of the ball joint nodes described above.

[0033] Example 2

[0034] Please refer to the appendix. Figure 2 The difference between this embodiment and the first embodiment is that the end cap 5 is provided with a connector 51 for replenishing lubricating grease into the ball joint. An oil cup is connected to the connector 51, and the lubricating grease is replenished into the ball joint as needed through the oil cup so that it can maintain good lubrication performance for a long time.

[0035] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A ball joint, characterized in that: The device includes a ball head (1) and a club end body (2). The ball head (1) includes a club body (11) and a ball head (12) located at the end of the club body (11). A mounting cavity for mounting the ball head (12) is provided on the club end body (2). A wear-resistant plastic front ball seat (3) and a wear-resistant plastic rear ball seat (4) with a split structure are installed in the mounting cavity. A concave spherical surface of the front ball seat and a concave spherical surface of the rear ball seat are formed on the wear-resistant plastic front ball seat (3) and the wear-resistant plastic rear ball seat (4), respectively. The ball head (12) is adapted to be movably installed between the concave spherical surface of the front ball seat and the concave spherical surface of the rear ball seat.

2. The ball joint according to claim 1, characterized in that: The mounting cavity of the rod end body (2) has a first opening and a second opening arranged opposite to each other. The rod body (11) of the ball head (1) is inserted from the first opening side and passes through the second opening side until the rear half of the ball head (12) abuts against the concave spherical surface of the rear ball seat of the wear-resistant plastic rear ball seat (4). The wear-resistant plastic front ball seat (3) is installed at the front half of the ball head (12) and its front ball seat concave spherical surface abuts against the front half of the ball head (12). An end cap (5) is installed on the first opening side of the mounting cavity. An elastic element (6) is provided between the end cap (5) and the wear-resistant plastic front ball seat (3).

3. The ball joint according to claim 2, characterized in that: The elastic element (6) is a compression spring.

4. The ball joint according to claim 2, characterized in that: Both the wear-resistant plastic front ball seat (3) and the wear-resistant plastic rear ball seat (4) are ball seat structures made of PEEK or PCT engineering plastic materials.

5. The ball joint according to claim 2, characterized in that: An axial through hole (31) is provided on the wear-resistant plastic front ball seat (3).

6. The ball joint according to claim 5, characterized in that: The end cap (5) is provided with a connector (51) for replenishing lubricating grease into the ball joint.

7. The ball joint according to claim 5, characterized in that: A sealing ring (7) is provided between the end cap (5) and the inner wall of the mounting cavity.

8. The ball joint according to claim 2, characterized in that: A sealing cover (8) is installed on the second opening side of the rod end body (2).

9. The ball joint according to claim 2, characterized in that: A stepped limiting part (21) is formed on the inner wall of the second opening side of the mounting cavity, and the wear-resistant plastic rear ball seat (4) abuts against the stepped limiting part (21).

10. A swing arm for an all-terrain vehicle, characterized in that: Includes the ball joint as described in any one of claims 1 to 9.

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