An assembly structure of a ball stud and a knuckle and a ball rod end joint bearing

Abstract

The utility model discloses a knuckle pin and knuckle assembly structure and ball head rod end joint bearing, including knuckle pin and knuckle, set up the taper hole that penetrates the knuckle in the knuckle, and knuckle pin includes the ball head portion, taper rod portion and connecting portion that connect gradually, and taper rod portion adapts to embed in the taper hole, and ball head portion and connecting portion are located at the both ends of knuckle respectively, and the connecting portion is connected with the locking nut and the limit pin that traverses connecting portion and is matched with locking nut, and is equipped with the elastic element between locking nut and knuckle. The utility model discloses the locking nut on the connecting portion that is connected to knuckle pin plays the anti -drop effect of limit pin, simultaneously, the elastic force when elastic element is compressed generates axial pre -tightening force, and the anti -vibrating of locking nut is improved through the axial pre -tightening force effect on locking nut and the friction force to improve the risk that locking nut is easy to loosen under the vibration condition, makes limit pin and elastic element play the good anti -loose effect of locking nut.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to an assembly structure of a ball joint pin and a steering knuckle, and a ball joint rod end spherical bearing. Background Technology

[0002] Ball joint rod end bearings, mainly composed of a ball joint pin, rod end body, and sealing cover, are widely used in the articulated joints of steering tie rods in construction machinery. The tapered rod of the ball joint pin mates with the tapered hole of the steering knuckle, and a lock nut secures the end of the ball joint pin. A cotter pin prevents the lock nut from coming loose. The rod end body connects to the steering tie rod. In construction machinery applications, taking mining trucks as an example, the road conditions are harsh, and the ball joint rod end bearing is subjected to significant impact loads and high-frequency vibrations. The lock nut is prone to loosening of the threaded connection (the cotter pin mainly serves to prevent loosening, but its effect on preventing threaded connection loosening is relatively poor), leading to axial clearance between the ball joint pin and the steering knuckle. This results in noise, abnormal sounds, and even, under impact loads, the ball joint pin may break, directly affecting the safety of the connection structure. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an assembly structure for a ball joint pin and a steering knuckle, which mainly solves the technical problem that the locking nut of the existing ball joint rod end spherical bearing is prone to loosening of the threaded connection under vibration conditions.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: An assembly structure for a ball joint and a steering knuckle includes a ball joint and a steering knuckle. A tapered hole is provided in the steering knuckle, and the ball joint includes a ball head, a tapered rod, and a connecting part connected in sequence. The tapered rod is fitted into the tapered hole. The ball head and the connecting part are located at the two ends of the steering knuckle, respectively. A locking nut and a limiting pin that crosses the connecting part and cooperates with the locking nut are connected to the connecting part. An elastic element that provides axial preload is provided between the locking nut and the steering knuckle.

[0005] Furthermore, the elastic element is a disc spring or a wave spring.

[0006] Furthermore, a gasket structure is provided between the steering knuckle and the locking nut. The gasket structure includes an upper gasket and a lower gasket sleeved in the connecting part. The upper gasket abuts against the steering knuckle, and the lower gasket abuts against the locking nut. An elastic element is provided between the upper gasket and the lower gasket.

[0007] Furthermore, the limiting pin is a cotter pin structure.

[0008] Furthermore, the locking nut is a slotted nut structure.

[0009] Based on the same inventive concept, this utility model also provides a ball joint bearing, including a rod end body and the above-mentioned assembly structure of the ball joint pin and steering knuckle, wherein the rod end body has a ball socket cavity, and the ball head of the ball joint pin is adapted to be installed in the ball socket cavity of the rod end body.

[0010] Furthermore, an intermediate transition section is provided between the ball head and the cone rod section, and a sealing cover is provided between the intermediate transition section and the rod end body.

[0011] Furthermore, a sealing cover is provided between the steering knuckle and the rod end body, and the sealing cover covers the entire sealing cover.

[0012] Furthermore, a pressure-limiting sleeve acting on the sealing cover is fitted onto the intermediate transition section.

[0013] The above technical solution has the following advantages or beneficial effects:

[0014] In the assembly structure of the ball joint pin and steering knuckle and the ball joint rod end bearing described in this utility model, the limiting pin plays a role in preventing the locking nut connected to the ball joint pin from loosening. At the same time, the elastic force generated by the elastic element when compressed generates an axial preload. The axial preload acts on the locking nut and, combined with the frictional force, improves the vibration resistance of the locking nut, thereby reducing the risk of the locking nut loosening under vibration conditions. This allows the limiting pin and the elastic element to achieve a good anti-loosening effect on the locking nut. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Label Explanation:

[0017] 1. Ball joint pin, 2. Steering knuckle, 3. Locking nut, 4. Limit pin, 5. Elastic element, 6. Gasket structure, 7. Rod end body, 8. Sealing cover, 9. Sealing cover sleeve, 11. Ball head, 12. Tapered rod part, 13. Connecting part, 14. Intermediate transition part, 61. Upper gasket, 62. Lower gasket. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Please refer to the appendix. Figure 1 An embodiment of this utility model provides an assembly structure for a ball joint pin and a steering knuckle, including a ball joint pin 1 and a steering knuckle 2. A tapered hole is provided in the steering knuckle 2. The ball joint pin 1 includes a ball head 11, a tapered rod 12 and a connecting part 13 connected in sequence. The tapered rod 12 is adapted to be embedded in the tapered hole. The ball head 11 and the connecting part 13 are located at both ends of the steering knuckle 2, respectively. A locking nut 3 and a limiting pin 4 that cooperates with the locking nut 3 are connected to the connecting part 13. An elastic element 5 that provides axial preload is provided between the locking nut 3 and the steering knuckle 2. It is understood that in this embodiment, the limiting pin 4 is used to prevent the locking nut 3 connected to the connecting part 13 of the ball head pin 1 from loosening. At the same time, the elastic force of the elastic element 5 when compressed generates an axial preload. The axial preload acts on the locking nut 3 and, combined with the frictional force, improves the vibration resistance of the locking nut 3, thereby reducing the risk of the locking nut 3 loosening under vibration conditions. This allows the limiting pin 4 and the elastic element 5 to have a good anti-loosening effect on the locking nut 3.

[0021] Please refer to the appendix. Figure 1 In one preferred embodiment, the elastic element 5 is a butterfly spring or a wave spring. In this embodiment, the butterfly spring or wave spring has high stiffness and can provide a large axial preload. However, those skilled in the art should understand that in other embodiments, the elastic element 5 can also be selected from other existing elastic structures with the same or similar properties as the butterfly spring or wave spring, and is not limited to the specific implementation disclosed in this embodiment.

[0022] Please refer to the appendix. Figure 1 In one preferred embodiment, a washer structure 6 is provided between the steering knuckle 2 and the locking nut 3. The washer structure 6 includes an upper washer 61 and a lower washer 62 sleeved in the connecting part 13. The upper washer 61 abuts against the steering knuckle 2, and the lower washer 62 abuts against the locking nut 3. An elastic element 5 is disposed between the upper washer 61 and the lower washer 62. In this embodiment, the cooperation of the upper washer 61 and the lower washer 62 enables the axial preload of the elastic element 5 to be transmitted to the locking nut 3 more stably, thereby improving the connection stability of the locking nut 3 on the connecting part 13.

[0023] Please refer to the appendix. Figure 1 In one preferred embodiment, the limiting pin 4 is a cotter pin structure, and the locking nut 3 is a slotted nut structure.

[0024] Please refer to the appendix. Figure 1One embodiment of this utility model also provides a ball joint rod end bearing, applicable to passenger cars and all-terrain vehicles. It includes a rod end body 7 and an assembly structure for the ball joint pin and steering knuckle. The rod end body 7 has a ball-and-socket cavity, and the ball head 11 of the ball joint pin 1 is fitted into the ball-and-socket cavity of the rod end body 7. An intermediate transition portion 14 is provided between the ball head 11 and the tapered rod portion 12, and a sealing cover 8 is provided between the intermediate transition portion 14 and the rod end body 7. Preferably, a sealing cover sleeve 9 is provided between the steering knuckle 2 and the rod end body 7, and the sealing cover sleeve 9 completely covers the sealing cover 8. Under harsh road conditions, the sealing cover of the ball joint rod end bearing is frequently damaged by gravel, leading to a large amount of mud and sand entering the bearing friction pair, causing abnormal wear and premature failure, severely affecting the product's service life and significantly increasing the maintenance costs for end users. In this embodiment, a protective sleeve 9 is added to the original protective sleeve 8 to protect it. The protective sleeve 9 is configured to have higher strength and impact resistance than the protective sleeve 8. Utilizing the high strength and impact resistance of the protective sleeve 9, the protective sleeve effectively prevents the protective sleeve from being directly damaged by stone impacts, providing dual protection and significantly improving the service life of the protective sleeve, thereby increasing the service life of the entire ball joint bearing. Furthermore, a pressure-limiting sleeve 10 is fitted onto the intermediate transition portion 14 to press and position the lower end of the protective sleeve 8 at the connection point with the intermediate transition portion 14, thus preventing displacement of the lower end of the protective sleeve 8 during bearing oscillation and ensuring proper sealing performance.

[0025] 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. An assembly structure for a ball joint pin and a steering knuckle, characterized in that: The device includes a ball joint pin (1) and a steering knuckle (2). A tapered hole is provided in the steering knuckle (2) through the steering knuckle (2). The ball joint pin (1) includes a ball head (11), a tapered rod (12) and a connecting part (13) connected in sequence. The tapered rod (12) is fitted into the tapered hole. The ball head (11) and the connecting part (13) are located at both ends of the steering knuckle (2). A locking nut (3) and a limiting pin (4) that cooperates with the locking nut (3) are connected to the connecting part (13). An elastic element (5) that provides axial preload is provided between the locking nut (3) and the steering knuckle (2).

2. The knuckle assembly of claim 1, wherein: The elastic element (5) is a butterfly spring or a wave spring.

3. The knuckle assembly of claim 1, wherein: A gasket structure (6) is provided between the steering knuckle (2) and the locking nut (3). The gasket structure (6) includes an upper gasket (61) and a lower gasket (62) sleeved in the connecting part (13). The upper gasket (61) abuts against the steering knuckle (2), and the lower gasket (62) abuts against the locking nut (3). An elastic element (5) is provided between the upper gasket (61) and the lower gasket (62).

4. The knuckle assembly of claim 1, wherein: The limiting pin (4) is a cotter pin structure.

5. The knuckle assembly of claim 1, wherein: The locking nut (3) is a slotted nut structure.

6. A ball stud end knuckle bearing characterized by: The assembly structure includes a rod end body (7) and a ball joint and steering knuckle as described in any one of claims 1 to 5, wherein a ball socket cavity is provided on the rod end body (7), and the ball head (11) of the ball joint (1) is adapted to be installed in the ball socket cavity of the rod end body (7).

7. Spherical rod end bearing according to claim 6, characterized in that An intermediate transition section (14) is provided between the ball head (11) and the cone rod section (12), and a sealing cover (8) is provided between the intermediate transition section (14) and the rod end body (7).

8. Spherical rod end bearing according to claim 7, characterized in that A sealing cover sleeve (9) is provided between the steering knuckle (2) and the rod end body (7), and the sealing cover sleeve (9) covers the entire sealing cover (8).

9. Spherical rod end bearing according to claim 7, characterized in that: A retaining sleeve (10) that acts to press against the sealing cover (8) is fitted on the intermediate transition section (14).

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