Ball joint for damper

Abstract

The utility model discloses a ball joint for a damper, and relates to the technical field of ball joints. The ball-and-socket joint comprises a ball-and-socket seat part which is internally provided with a mounting cavity, the mounting cavity is provided with an opening, and a concave space is formed in the inner wall of the mounting cavity; the ball pin comprises a spherical head part and a pin rod part connected with the spherical head part, the spherical head part can be accommodated in the mounting cavity in a relatively rotating manner, and the pin rod part extends out of the mounting cavity from the opening; the elastic element is at least partially arranged in the concave space, and the elastic element is configured to apply acting force to the spherical head part in the axial vibration direction. Abnormal sound and collision damage caused by axial movement in the reversing process of the damper and under the vibration working condition can be avoided, and the service life of the ball socket joint can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ball and socket joints, in particular to a ball and socket joint for a damper. Background Art

[0002] In the related art, the ball joint includes a ball socket base, a retaining spring and a ball pin. During installation, the retaining spring is first installed and fixed to the ball socket base, and then the ball pin is inserted into the ball socket base through the retaining opening of the retaining spring. The retaining opening limits the relative rotation of the ball pin in the ball socket base.

[0003] To ensure smooth rotation of the ball pin during use, a theoretical clearance is designed between the ball pin and the ball joint base. During the piston-cylinder assembly's operating conditions, when switching between tension and compression, this clearance between the ball joint and the ball pin can cause axial movement and noise.

[0004] In addition, during the whole machine vibration test and actual use test, due to the existence of theoretical clearance, the piston-cylinder assembly will vibrate and make abnormal noises along the vertical direction of the ball joint along the vibration frequency of the whole machine.

[0005] The collision and friction caused by the above-mentioned abnormal noise and vibration will cause wear of the ball stud and reduce the service life of the ball joint.

[0006] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in this field. Utility Model Content

[0007] Purpose of the utility model: The technical problem to be solved by the utility model is to provide a ball joint for a damper in response to the deficiencies of the existing technology, which can avoid abnormal noise and collision damage caused by axial movement during the reversing process and vibration working conditions of the damper, and help to improve the service life of the ball joint.

[0008] In order to solve the above technical problems, the utility model discloses a ball joint for a damper, which comprises:

[0009] The ball socket portion has a mounting cavity provided therein, the mounting cavity having an opening and a recessed space formed on an inner wall thereof;

[0010] A ball stud, comprising a spherical head and a pin shaft connected to the spherical head, wherein the spherical head is relatively rotatably accommodated in the mounting cavity, and the pin shaft extends out of the mounting cavity from the opening;

[0011] and an elastic element, wherein the elastic element is at least partially disposed in the recessed space and is configured to apply a force along an axial vibration direction to the spherical head.

[0012] Optionally, the elastic element is a ball spring.

[0013] Furthermore, it also includes an elastic pad, which is clamped between the spherical head and the inner wall of the installation cavity on a side opposite to the opening.

[0014] Optionally, the elastic pad is made of rubber.

[0015] Furthermore, a lubricating layer is included, and the lubricating layer is arranged on a surface of the elastic pad opposite to the spherical head.

[0016] Optionally, the lubricating layer is grease.

[0017] Furthermore, a ball and socket handle portion for connecting to the damper is formed by extending outward from the ball and socket seat portion, and an extending direction of the ball and socket handle portion is consistent with the axial vibration direction.

[0018] Specifically, the recessed space is opened on the inner wall of the ball socket portion close to the ball socket handle portion.

[0019] Specifically, the axial vibration direction is perpendicular to the opening direction of the installation cavity.

[0020] Specifically, it comprises a retaining spring, which is embedded and installed on the ball socket portion; the retaining opening of the retaining spring confines the spherical head in the installation cavity.

[0021] Beneficial effects:

[0022] 1. This application adds an elastic element in the axial vibration direction to automatically compensate for the gap between the mounting cavity of the ball socket and the spherical head in the axial vibration direction, thereby avoiding abnormal noise and collision damage caused by axial movement during the damper reversing process and vibration working conditions.

[0023] 2. This application fills an elastic pad between the spherical head and the inner wall of the mounting cavity opposite to the opening to compensate for the gap between the mounting cavity and the spherical head in the direction of the opening, thereby avoiding abnormal noise and collision damage caused by vertical movement during vibration conditions;

[0024] 3. Furthermore, the present application provides a lubricating layer on the surface of the elastic pad to prevent the elastic pad from aging and wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, and the above and / or other advantages of the present invention will become more apparent.

[0026] Figure 1 A schematic structural diagram of a ball and socket joint for a damper provided in one embodiment of the present utility model;

[0027] Figure 2 for Figure 1 A schematic cross-sectional view of a ball joint for a damper is shown.

[0028] Description of the accompanying drawings:

[0029] 1. Ball socket; 11. Ball socket seat; 111. Mounting cavity; 112. Opening; 113. Recessed space; 12. Ball socket handle; 121. Connecting hole; 2. Ball stud; 21. Spherical head; 22. Pin shaft; 3. Elastic element; 4. Elastic pad; 5. Lubricating layer; 6. Circlip. DETAILED DESCRIPTION

[0030] Example 1

[0031] Combine Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a ball joint for a damper, which includes a ball socket 1, a ball stud 2, and an elastic element 3. The ball socket 1 includes a ball socket portion 11, and a mounting cavity 111 is provided inside the ball socket portion 11. The mounting cavity 111 has an opening 112 and a recessed space 113 is formed on its inner wall. The ball stud 2 includes a spherical head 21 and a pin portion 22 connected to the spherical head 21. The spherical head 21 is relatively rotatably accommodated in the mounting cavity 111, and the pin portion 22 extends out of the mounting cavity 111 from the opening 112. The elastic element 3 is at least partially disposed in the recessed space 113, and the elastic element 3 is configured to apply a force along the axial vibration direction to the spherical head 21.

[0032] In this embodiment, the axial vibration direction is perpendicular to the opening 112 of the installation cavity 111 .

[0033] This embodiment adds an elastic element 3 in the axial vibration direction to automatically compensate for the gap between the mounting cavity 111 of the ball socket portion 11 and the spherical head 21 in the axial vibration direction, thereby avoiding abnormal noise and collision damage caused by axial movement during the damper reversing process and vibration working conditions.

[0034] Optionally, the elastic element 3 is a ball spring. One end of the ball spring can be fixedly installed in the recessed space 113 to prevent it from falling off.

[0035] In some embodiments, see Figure 2The ball joint further includes an elastic pad 4 , which is sandwiched between the spherical head 21 and an inner wall of the mounting cavity 111 on a side opposite to the opening 112 .

[0036] In this embodiment, an elastic pad 4 is filled between the spherical head 21 and the inner wall of the mounting cavity 111 on the side opposite to the opening 112 to compensate for the gap between the mounting cavity 111 and the spherical head 21 in the direction pointing to the opening, thereby avoiding abnormal noise and collision damage caused by vertical movement during vibration conditions.

[0037] Optionally, the elastic pad 4 is made of rubber material such as EPDM rubber.

[0038] In some embodiments, see Figure 2 The ball joint further comprises a lubricating layer 5, which is provided on a surface of the elastic pad 4 opposite to the spherical head 21. The lubricating layer 5 serves as a lubricant to prevent the elastic pad 4 from aging and wear.

[0039] Optionally, the lubricating layer 5 is obtained by coating the surface of the elastic pad 4 with lubricating grease or paraffin. The lubricating layer 5 may also be a graphite coating or a polymer coating.

[0040] In some embodiments, see Figure 2 The ball joint further includes a ball handle portion 12 extending outwardly from the ball seat portion 11, and the ball handle portion 12 is used to connect with the damper. The extending direction of the ball handle portion 12 is consistent with the axial vibration direction.

[0041] Alternatively, see Figure 2 The recessed space 113 is provided on the inner wall of the ball socket portion 11 near the ball socket handle portion 12. The recessed space 113 is provided at this position and is not directly connected to the outside world, and has excellent performance in terms of corrosion resistance and foreign body prevention.

[0042] Specifically, see Figure 2 The ball and socket handle 12 is provided with a connecting hole 121. The recessed space 113 can be connected to the connecting hole 121. The connecting hole 121 can be a threaded hole for connecting the ball and socket handle 12 to the damper body.

[0043] The connecting hole 121 can be communicated with a recessed space 113 provided on the inner wall of the ball socket portion 11 near the ball socket handle portion 12 , so as to facilitate the installation and debugging of the elastic element and reduce the difficulty of production and processing.

[0044] In some embodiments, see Figure 1 and Figure 2 The ball and socket joint includes a retaining spring 6, which is embedded in the ball and socket seat 11. The retaining opening of the retaining spring 6 confines the spherical head 21 in the mounting cavity 111.

[0045] In this embodiment, see Figure 2 The length direction of the ball handle portion 12 is perpendicular to the length direction of the pin portion 22.

[0046] See also Figure 2 During installation, the elastic pad 4 is pre-installed in the recessed space 113. The spherical head 21 of the ball stud 2 is pressed into the mounting cavity 111 of the ball socket 11 through the opening 112 and the retaining opening of the retaining spring 6 along the direction of the opening 112. After being pressed in, the elastic pad 4 will be compressed and generate a reverse elastic force to compensate for the vertical theoretical gap between the spherical head 21 of the ball stud 2 and the mounting cavity 111 of the ball socket 11, thereby reducing vertical vibration and abnormal noise. After the spherical head 21 is installed in place, the elastic element 3 will adaptively compress and dynamically compensate for the axial theoretical gap between the spherical head 21 of the ball stud 2 and the mounting cavity 111 of the ball socket 11, thereby reducing axial movement and abnormal noise. After being pressed in, the spherical head 21 contacts the elastic pad 4 and the lubricating layer 5. The lubricating layer 5 is squeezed and diffused to the surface of the elastic pad 4, thereby achieving lubrication and protection for the elastic pad 4.

[0047] This utility model provides a concept and method for a ball joint for a damper. There are many methods and approaches to implement this technical solution. The above is only a preferred embodiment of the utility model. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the utility model, and such improvements and modifications should also be considered within the scope of protection of the utility model. Any components not specified in this embodiment may be implemented using existing technologies.

Claims

1. A ball joint for a damper, characterized in that: include: A ball socket portion (11) is provided with a mounting cavity (111) therein, wherein the mounting cavity (111) has an opening (112) and a recessed space (113) is formed on an inner wall thereof; A ball stud (2) comprises a spherical head (21) and a pin portion (22) connected to the spherical head (21), wherein the spherical head (21) is relatively rotatably accommodated in the mounting cavity (111), and the pin portion (22) extends out of the mounting cavity (111) from the opening (112); and an elastic element (3), wherein the elastic element (3) is at least partially disposed in the recessed space (113), and the elastic element (3) is configured to apply a force along an axial vibration direction to the spherical head (21).

2. The ball joint for a damper according to claim 1, wherein: The elastic element (3) is a wave spring.

3. The ball joint for a damper according to claim 1 or 2, characterized in that: It also includes an elastic pad (4), which is sandwiched between the spherical head (21) and the inner wall of the installation cavity (111) on a side opposite to the opening (112).

4. The ball joint for a damper according to claim 3, wherein: The elastic pad (4) is made of rubber material.

5. The ball joint for a damper according to claim 3, wherein: It also includes a lubricating layer (5), which is arranged on a surface of the elastic pad (4) opposite to the spherical head (21).

6. The ball joint for a damper according to claim 5, wherein: The lubricating layer (5) is made of lubricating grease.

7. The ball joint for a damper according to claim 1, wherein: It also includes a ball and socket handle portion (12) for connecting to the damper. The ball and socket handle portion (12) is formed by extending outward from the ball and socket seat portion (11), and the extending direction of the ball and socket handle portion (12) is consistent with the axial vibration direction.

8. The ball joint for a damper according to claim 7, wherein: The recessed space (113) is opened on the inner wall of the ball socket portion (11) close to the ball socket handle portion (12).

9. The ball joint for a damper according to claim 7, wherein: The axial vibration direction is perpendicular to the opening (112) direction of the installation cavity (111).

10. The ball joint for a damper according to claim 1, wherein: It comprises a retaining spring (6), which is embedded and installed on the ball socket portion (11); the retaining opening of the retaining spring (6) confines the spherical head (21) in the installation cavity (111).

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