A ball joint assembly for protecting dust covers

Abstract

This application relates to a ball joint assembly for protecting a dust cover, belonging to the technical field of ball joint assemblies. It includes a ball shell and a ball pin. The ball pin includes an integrally fixed pin rod and a ball head. The pin rod has a reduced diameter section, and a rubber ring is fitted over the reduced diameter section. A connecting ring made of rigid material is fixed to the outer wall of the rubber ring. A dust cover is fitted over the connecting ring, and the other end of the dust cover is connected and fixed to the ball shell. The inner sidewall of the rubber ring is an arc surface, and the sidewall of the reduced diameter section is also an arc surface, with the radius of the arc surface of the reduced diameter section being larger than the radius of the arc surface of the inner sidewall of the rubber ring. This application, through the cooperation of the rubber ring and the reduced diameter section, allows the rubber ring to swing at an angle while maintaining a closed contact. After the pin rod swings at a large angle, the dust cover deforms. The elasticity of the dust cover pushes the connecting ring to adaptively swing at the angle, thereby reducing the deformation of the dust cover, protecting the dust cover, and reducing the probability of cracking and damage. It is particularly suitable for ball joint assemblies with a large rotation angle range.

Description

Technical Field

[0001] This application relates to the field of ball joint assembly technology, and in particular to a ball joint assembly with a protective dust cover. Background Technology

[0002] A ball joint assembly is a component that combines a ball housing and a ball head. It is widely used in automotive and other mechanical transmission fields. The ball head is integrally fixed with a pin for connection with other structures.

[0003] The utility model patent with announcement number CN201851486U discloses a ball joint pin assembly, which... Figure 1 This is a cross-sectional view of a conventional ball joint assembly, which includes a ball joint with a ball head, a ball joint seat, a nylon ball cup, a ball joint cap, and a dust cover for covering the opening of the ball joint seat. The ball head is part of the ball joint, passing through the opening of the ball joint seat and entering the ball joint seat. The ball head is encased in the nylon ball cup, and both the ball head and the nylon ball cup are located within the ball joint seat. The ball joint cap is fitted into the ball joint seat and is pressed tightly against the outside of the nylon ball cup.

[0004] Regarding the aforementioned technologies, the inventors believe that the dust cover will be squeezed and deformed when the ball pin rotates. Some ball pins have a large rotation angle range, so the dust cover needs to withstand more deformation. Over time, as the dust cover material ages, it is easy for the dust cover to crack and be damaged. Utility Model Content

[0005] This application provides a ball joint assembly for protecting a dust cover, which can reduce the deformation of the dust cover, thereby protecting the dust cover and reducing the probability of cracking and damage.

[0006] The ball joint assembly for protecting dust covers provided in this application adopts the following technical solution: A ball head assembly for protecting a dust cover includes a ball shell and a ball pin. The ball pin includes an integrally fixed pin rod and a ball head. The pin rod has a reduced diameter section. A rubber ring is sleeved on the reduced diameter section. A connecting ring of rigid material is fixed to the outer wall of the rubber ring. A dust cover is sleeved on the connecting ring. The other end of the dust cover is connected and fixed to the ball shell.

[0007] By adopting the above technical solution, the rubber ring and the reduced diameter section are matched to maintain a closed contact while allowing the rubber ring to swing at an angle. When the pin swings at a large angle, the dust cover deforms, and the elasticity of the dust cover pushes the connecting ring to adapt to the swing angle, thereby reducing the deformation of the dust cover.

[0008] Optionally, the inner wall of the rubber ring is an arc surface, and the side wall of the reduced diameter section is also an arc surface, wherein the radius of the arc surface of the reduced diameter section is larger than the radius of the arc surface of the inner wall of the rubber ring.

[0009] By adopting the above technical solution, the rubber ring can swing at a more convenient angle, while the arc surface ensures full contact.

[0010] Optionally, the pin is integrally formed with a convex ring, which is located at the top of the reduced diameter section. The top surface of the convex ring is chamfered, and the bottom surface of the convex ring is a plane perpendicular to the axis of the pin.

[0011] By adopting the above technical solution, the convex ring is chamfered to facilitate the rubber ring to fit into the reduced diameter section, and the convex ring restricts the rubber ring through the bottom plane to prevent the rubber ring from spontaneously detaching from the reduced diameter section.

[0012] Optionally, a limiting ring groove is formed on the outer side wall of the connecting ring, and the upper end of the dust cover is embedded in the limiting ring groove.

[0013] By adopting the above technical solution, the upper end of the dust cover is embedded into the limiting ring groove by stretching and expanding, and can be installed without fasteners, and is stable enough under normal use.

[0014] Optionally, the upper outer wall of the dust cover is integrally formed with a pull ring, which corresponds to the position of the limiting ring groove.

[0015] By adopting the above technical solution, the pull ring makes it easy for people to pinch and pull the upper end of the dust cover.

[0016] Optionally, a limiting annular groove 2 is formed on the outer side wall of the spherical shell, and the lower end of the dust cover is embedded in the limiting annular groove 2.

[0017] By adopting the above technical solution, the lower end of the dust cover is embedded into the limiting ring groove 2 by stretching and expanding, and can be installed without fasteners, and is stable enough under normal use.

[0018] Optionally, the lower outer wall of the dust cover is integrally formed with a pull ring two, the pull ring two corresponding to the position of the limiting ring groove two.

[0019] By adopting the above technical solution, the second pull ring makes it easy for people to pinch and pull the lower end of the dust cover.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. By cooperating with the reduced diameter section, the rubber ring is allowed to swing at an angle while maintaining a closed contact. 2. After the pin swings at a large angle, the dust cover deforms. The elasticity of the dust cover pushes the connecting ring to swing adaptively, thereby reducing the deformation of the dust cover. 3. Protective dust cover reduces the probability of cracking and damage, especially suitable for ball joint assemblies with a large rotation angle range. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the ball head assembly of a protective dust cover according to an embodiment; Figure 2 yes Figure 1 Enlarged view of point A; Figure 3 This is a partial exploded view of an embodiment; Figure 4 This is a schematic diagram of the working state of an embodiment.

[0022] Explanation of reference numerals in the attached drawings: 1. Spherical shell; 2. Pin; 21. Ball head; 22. Reduced diameter section; 3. Rubber ring; 31. Connecting ring; 4. Dust cover; 23. Convex ring; 32. Limiting ring groove one; 41. Pull ring one; 11. Limiting ring groove two; 42. Pull ring two. Detailed Implementation

[0023] The present application will be further described in detail below with reference to the accompanying drawings.

[0024] Reference Figure 1 This embodiment discloses a ball head assembly for protecting a dust cover, including a ball shell 1 and a ball pin. The ball pin includes an integrally fixed pin rod 2 and a ball head 21, and the ball head 21 is rotatably connected to the ball shell 1.

[0025] The pin 2 has a reduced diameter section 22, and a rubber ring 3 is fitted over the reduced diameter section 22. A connecting ring 31 made of rigid material is fixed to the outer wall of the rubber ring 3. A dust cover 4 is fitted over the connecting ring 31, and the other end of the dust cover 4 is connected and fixed to the ball shell 1. The dust cover 4 protects the rotating parts of the ball head 21 from dust.

[0026] Reference Figure 2 and Figure 3 The rubber ring 3 is made of a relatively soft rubber material, which facilitates deformation. The inner wall of the rubber ring 3 is an arc surface, and the side wall of the reduced diameter section 22 is also an arc surface. The radius of the arc surface of the reduced diameter section 22 is larger than the radius of the arc surface of the inner wall of the rubber ring 3. This design facilitates the swing angle of the rubber ring 3, ensures full contact through the arc surface, and allows the rubber material to deform, maintaining a circumferential contact between the rubber ring 3 and the outer wall of the reduced diameter section 22, ensuring a sealed dustproof effect.

[0027] The pin 2 is integrally formed with a convex ring 23, which is located at the top of the reduced diameter section 22. The top surface of the convex ring 23 is chamfered, and the bottom surface of the convex ring 23 is a plane perpendicular to the axis of the pin 2. The chamfer of the convex ring 23 facilitates the insertion of the rubber ring 3 into the reduced diameter section 22, and the bottom plane of the convex ring 23 restricts the rubber ring 3, preventing the rubber ring 3 from spontaneously detaching from the reduced diameter section 22.

[0028] Reference Figure 1 and Figure 3A limiting groove 32 is formed on the outer wall of the connecting ring 31, and the upper end of the dust cover 4 is embedded in the limiting groove 32. A pull ring 41 is integrally formed on the upper outer wall of the dust cover 4, corresponding to the position of the limiting groove 32. The upper end of the dust cover 4 is embedded in the limiting groove 32 by stretching and expanding, allowing for installation without fasteners. It is sufficiently stable under normal use, and the pull ring 41 facilitates gripping and pulling the upper end of the dust cover 4.

[0029] Reference Figure 1 The outer wall of the spherical shell 1 has a limiting annular groove 11, and the lower end of the dust cover 4 is embedded in the limiting annular groove 11. A pull ring 42 is integrally formed on the lower outer wall of the dust cover 4, corresponding to the position of the limiting annular groove 11. The lower end of the dust cover 4 is embedded in the limiting annular groove 11 by stretching and expanding, allowing for installation without fasteners. It is sufficiently stable under normal use, and the pull ring 42 facilitates gripping and pulling the lower end of the dust cover 4.

[0030] The implementation principle of a ball head assembly for a protective dust cover according to an embodiment of this application is as follows: through the cooperation of the rubber ring 3 and the reduced diameter section 22, the rubber ring 3 is allowed to swing at an angle while maintaining contact and sealing.

[0031] Reference Figure 4 When the pin 2 swings at a large angle, the dust cover 4 deforms. The elasticity of the dust cover 4 pushes the connecting ring 31 to adapt to the swing angle, thereby reducing the deformation of the dust cover 4, thus protecting the dust cover 4 and reducing the probability of cracking and damage. It is especially suitable for ball joint assemblies with a large rotation angle range.

[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ball head assembly of a protective dust cover, comprising a ball shell (1) and a ball pin, the ball pin comprising a pin shaft (2) and a ball head (21) integrally fixed, characterized in that: The pin (2) has a reduced diameter section (22), and a rubber ring (3) is provided on the outer sleeve of the reduced diameter section (22). A connecting ring (31) made of hard material is fixed on the outer wall of the rubber ring (3). A dust cover (4) is provided on the outer sleeve of the connecting ring (31). The other end of the dust cover (4) is connected and fixed to the spherical shell (1).

2. A ball stud assembly for a protective dust boot according to claim 1, wherein: The inner wall of the rubber ring (3) is an arc surface, and the side wall of the reduced diameter section (22) is also an arc surface. The radius of the arc surface of the reduced diameter section (22) is greater than the radius of the arc surface of the inner wall of the rubber ring (3).

3. A ball stud assembly for a protective dust boot according to claim 1, wherein: The pin (2) is integrally formed with a convex ring (23), which is located at the top of the reduced diameter section (22). The top surface of the convex ring (23) is chamfered, and the bottom surface of the convex ring (23) is a plane perpendicular to the axis of the pin (2).

4. A ball stud assembly for a protective dust boot according to claim 1, wherein: The outer side wall of the connecting ring (31) is provided with a limiting ring groove (32), and the upper end of the dust cover (4) is embedded in the limiting ring groove (32).

5. A ball stud assembly for a protective dust boot according to claim 4, wherein: The dust cover (4) has an integrally formed pull ring (41) on its upper outer wall, and the pull ring (41) corresponds to the position of the limiting ring groove (32).

6. A ball stud assembly for a protective dust boot according to claim 1, wherein: The outer side wall of the spherical shell (1) is provided with a limiting annular groove 2 (11), and the lower end of the dust cover (4) is embedded in the limiting annular groove 2 (11).

7. A ball stud assembly for a protective dust cover according to claim 6, wherein: The lower outer wall of the dust cover (4) is integrally formed with a pull ring two (42), which corresponds to the position of the limiting ring groove two (11).

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