Swing arm assembly

Abstract

The utility model provides a swing arm assembly, and belongs to the technical field of automobile accessories. The swing arm assembly solves the problem that the welding position between a ball pin assembly and an arm body in an existing swing arm assembly is prone to breakage. The swing arm assembly comprises an arm body and a ball pin assembly, the arm body comprises a shell, a ball seat of the ball pin assembly comprises a ball seat main body, the peripheral surface of the ball seat main body is attached to the shell and is welded and fixed, the arm body further comprises an auxiliary plate which covers the shell and is welded and fixed to the shell, and the peripheral surface of the ball seat main body is further attached to the peripheral surface of the auxiliary plate and is welded and fixed to the auxiliary plate. The ball seat of the ball pin assembly further comprises a protruding connecting plate integrally arranged on the peripheral face of the ball seat body, the connecting plate is inserted between the shell and the auxiliary plate, a first welding seam is formed between the peripheral face of the connecting plate and the inner surface of the auxiliary plate, and a welding hole is formed in the position, corresponding to the connecting plate, of the auxiliary plate. Second welding seams are formed between the side faces, facing the auxiliary plates, of the connecting plates and the hole wall faces of the welding holes. According to the swing arm assembly, the stability of connection between the ball pin assembly and the arm body is improved.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology and relates to a swing arm assembly. Background Technology

[0002] In a car's suspension system, a control arm is connected. One end of the control arm is fixed to a ball joint assembly, the other end is fixed to a first bushing, and a second bushing is often fixed to the middle of the control arm. Rubber bodies are installed in the first and second bushings, which have a cushioning and vibration damping function.

[0003] For example, a swing arm assembly disclosed in Chinese patent literature [Application No.: CN200720303217.5; Publication No.: CN201128364 Y] includes an arm body, a cylindrical bushing, a spherical bushing, and a ball pin assembly for connecting with a steering knuckle, wherein the ball seat of the ball pin assembly is press-fitted into a straight hole at one end of the arm body, and then riveted and fixed.

[0004] Besides riveting, the ball joint assembly can also be fixed to the arm body by welding. For example, the sleeve structure at the straight hole of the arm body can be changed to a semi-circular arc structure with an opening on one side. During the assembly of the ball joint assembly, the ball seat of the ball joint assembly is welded to the semi-circular arc structure of the arm body. However, because the ball seat of the ball joint assembly and the semi-circular arc structure of the arm body only form a semi-circular welded fixing structure, a weak point in the structural strength of the swing arm assembly appears at this welded structure. During the use of the swing arm assembly, it is prone to breakage at this welded structure. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a swing arm assembly that solves the technical problem of how to improve the stability of the connection between the ball pin assembly and the arm body.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A swing arm assembly includes an arm body and a ball joint assembly. The arm body includes a housing, and the ball joint assembly includes a ball joint body. The outer peripheral surface of the ball joint body is abutted against the housing and welded to it. The arm body further includes a sub-plate that is covered and welded to the housing. The outer peripheral surface of the ball joint body is also abutted against the outer peripheral surface of the sub-plate and welded to it. The ball joint assembly also includes a connecting plate integrally formed and protruding on the outer peripheral surface of the ball joint body. The connecting plate is inserted between the housing and the sub-plate. A first weld is formed between the outer peripheral surface of the connecting plate and the inner surface of the sub-plate. A welding hole is formed on the sub-plate corresponding to the connecting plate. A second weld is formed between the side of the connecting plate facing the sub-plate and the wall of the welding hole.

[0008] When assembling the swing arm assembly, the outer peripheral surface of the ball seat body is first placed against the outer peripheral surface of the sub-plate. Then, the first weld is formed between the outer peripheral surface of the connecting plate and the inner surface of the sub-plate. Next, the sub-plate is placed on the outer shell, with the connecting plate located between the sub-plate and the outer shell, and the outer peripheral surface of the ball seat body is placed against the outer shell. Then, the outer shell and the sub-plate are welded, and the ball seat body is welded and fixed to the outer shell and the sub-plate. Finally, a second weld is formed in the welding hole between the side of the connecting plate facing the sub-plate and the wall of the welding hole.

[0009] The sub-plate, mounted on and welded to the outer shell, enhances the structural strength and stability of the arm. The welding of both the outer shell and the sub-plate to the ball seat body further strengthens the connection between the ball seat body and the arm, thus improving the stability of the connection between the ball pin assembly and the arm. Simultaneously, the connecting plate is welded to the sub-plate at two locations—one on its outer circumference and the other on its side—via the first and second welds, ensuring a stable connection between them. Since the connecting plate is integrally formed with the ball seat body, this further improves the stability of the connection between the ball seat and the arm, thereby enhancing the overall stability of the connection between the ball pin assembly and the arm.

[0010] In the aforementioned swing arm assembly, the connecting plate is quadrilateral, one side of the connecting plate is integrally connected to the outer peripheral surface of the ball seat body, the first weld is located on the side of the connecting plate facing away from the ball seat body, and there are positioning welds on both sides of the connecting plate adjacent to the ball seat body and the inner surface of the sub-plate.

[0011] When welding the connecting plate and the sub-plate, locating welds can be made first on the two sides of the connecting plate adjacent to the ball seat body to form a locating weld, thus positioning the connecting plate and the sub-plate. Then, the first weld can be made. This avoids the ball seat position shifting when the first weld is made, which would affect the positional accuracy between the ball pin assembly and the arm body. In addition to its positioning function, the locating welds also improve the structural strength of the connection between the connecting plate and the sub-plate, and enhance the stability of the connection between the ball pin assembly and the arm body.

[0012] In the aforementioned swing arm assembly, the side of the connecting plate facing away from the ball seat body is an arc shape that is recessed into the ball seat body. This results in an arc-shaped first weld, which increases the length of the first weld, improves the connection strength between the connecting plate and the sub-plate at the first weld, and thus enhances the stability of the connection between the ball pin assembly and the arm body.

[0013] In the aforementioned swing arm assembly, the outer edge of the outer shell has a surrounding wall, and the outer edge of the sub-plate is welded and fixed to the surrounding wall. The surrounding wall can improve the structural strength at the edge of the outer shell, and the welding and fixing of the sub-plate to the surrounding wall can improve the stability of the arm structure.

[0014] In the aforementioned swing arm assembly, the ball seat body is cylindrical, and the connecting plate is perpendicular to the axis of the ball seat body. This improves the tensile strength of the ball seat and facilitates a stable connection between the ball pin assembly and the arm body.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The sub-plate is installed on the outer shell and welded in place. Both the outer shell and the sub-plate are welded in place to the main body of the ball seat. At the same time, the connecting plate is integrally set with the main body of the ball seat. The connecting plate is welded in place to the sub-plate at multiple positions on its outer circumference and side through positioning welds, first welds and second welds, which improves the stability of the connection between the ball pin assembly and the arm body. Attached Figure Description

[0017] Figure 1 This is a front view of the swing arm assembly.

[0018] Figure 2 This is a left view of the swing arm assembly.

[0019] Figure 3 yes Figure 1 A magnified view of a portion of the ball pin assembly.

[0020] Figure 4 yes Figure 3 Cross-sectional view along the AA direction.

[0021] Figure 5 This is a three-dimensional view of the ball seat in the swing arm assembly.

[0022] In the figure, 1 is the arm body; 1a is the outer shell; 1a1 is the enclosure; 1b is the sub-plate; 1b1 is the welding hole; 1c is the main weld; 2 is the first bushing; 3 is the second bushing; 4 is the ball pin assembly; 4a is the ball seat; 4a1 is the ball seat body; 4a2 is the connecting plate; 4b is the ball pin; 5 is the first weld; 6 is the second weld; 7 is the locating weld; 8 is the first fixing weld; and 9 is the second fixing weld. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figure 1 and Figure 2As shown, a swing arm assembly includes an arm body 1, a first bushing 2, a second bushing 3, and a ball pin assembly 4. The ball pin assembly 4 is fixedly connected to one end of the arm body 1, the first bushing 2 is fixedly connected to the other end of the arm body 1, and the second bushing 3 is fixedly connected to the middle of the arm body 1. The arm body 1 includes a housing 1a and a sub-plate 1b that is covered and welded to the housing 1a. The outer edge of the sub-plate 1b is welded to the outer edge of the housing 1a to form a main weld 1c. The ball pin assembly 4 includes a ball seat 4a and a ball pin 4b. One end of the ball pin 4b is located inside the ball seat 4a, and the other end of the ball pin 4b extends out of the ball seat 4a.

[0025] like Figure 3 and Figure 4 As shown, the outer edge of the outer shell 1a has a surrounding wall 1a1, and the outer edge of the sub-plate 1b is welded and fixed to the surrounding wall 1a1. Figure 5 As shown, the ball seat 4a includes a cylindrical ball seat body 4a1 and a connecting plate 4a2 integrally formed and protruding on the outer circumferential surface of the ball seat body 4a1. The connecting plate 4a2 is perpendicular to the axis of the ball seat body 4a1. The connecting plate 4a2 is inserted between the outer shell 1a and the sub-plate 1b, and the inner surface of the connecting plate 4a2 abuts against the inner surface of the sub-plate 1b. The outer circumferential surface of the ball seat body 4a1 abuts against the outer circumferential surface of the outer shell 1a and is welded and fixed, forming a first fixing weld 8; the outer circumferential surface of the ball seat body 4a1 also abuts against the outer circumferential surface of the sub-plate 1b and is welded and fixed, forming a second fixing weld 9. The first fixing weld 8 and the second fixing weld 9 are connected, and the connection point between them is connected to the main weld 1c. This can improve the structural strength between the ball seat 4a and the arm body 1 and improve the connection stability. A first weld 5 is formed between the outer peripheral surface of the connecting plate 4a2 and the inner surface of the sub-plate 1b. A welding hole 1b1 is formed on the sub-plate 1b corresponding to the location of the connecting plate 4a2. A second weld 6 is formed between the side of the connecting plate 4a2 facing the sub-plate 1b and the wall surface of the welding hole 1b1. The connecting plate 4a2 is quadrilateral, with one side integrally connected to the outer peripheral surface of the ball seat body 4a1. The first weld 5 is located on the side of the connecting plate 4a2 facing away from the ball seat body 4a1. Positioning welds 7 are formed between the two sides of the connecting plate 4a2 adjacent to the ball seat body 4a1 and the inner surface of the sub-plate 1b. The two positioning welds 7 are set separately from the first weld 5. This reduces the deformation of the connecting plate 4a2 during cooling of the positioning welds 7 and the first weld 5, ensuring the positional accuracy of the ball seat 4a on the arm body 1. The side of the connecting plate 4a2 facing away from the ball seat body 4a1 is an arc shape that is recessed into the ball seat body 4a1, making the first weld 5 arc-shaped.

[0026] When assembling the swing arm assembly, the outer peripheral surface of the ball seat body 4a1 is first placed against the outer peripheral surface of one end of the sub-plate 1b, so that the side of the connecting plate 4a2 is against the inner surface of the sub-plate 1b. Then, a positioning weld 7 is welded between the outer peripheral surface of the connecting plate 4a2 and the inner surface of the sub-plate 1b. Then, the first weld 5 is formed. Next, the sub-plate 1b is placed on the outer shell 1a, with the connecting plate 4a2 located between the sub-plate 1b and the outer shell 1a, and the outer peripheral surface of the ball seat body 4a1 is also placed against the outer peripheral surface of the outer shell 1a. Then, the outer shell 1a and the sub-plate 1b are welded, and the ball seat body 4a1, the first bushing 2 and the second bushing 3 are welded and fixed to the outer shell 1a and the sub-plate 1b. Finally, a second weld 6 is formed in the welding hole 1b1 between the side of the connecting plate 4a2 facing the sub-plate 1b and the wall of the welding hole 1b1.

[0027] The auxiliary plate 1b is mounted on the outer shell 1a and welded in place, which improves the structural strength of the arm body 1 and makes the structure of the arm body 1 stable. Both the outer shell 1a and the auxiliary plate 1b are welded and fixed to the ball seat body 4a1, which improves the structural strength between the ball seat body 4a1 and the arm body 1. Meanwhile, the connecting plate 4a2 is integrally formed with the ball seat body 4a1, and the connecting plate 4a2 is welded and fixed to the auxiliary plate 1b at multiple positions on its outer circumference and side via locating welds 7, the first weld 5, and the second weld 6, ensuring a stable connection between the connecting plate 4a2 and the auxiliary plate 1b. This improves the stability of the connection between the ball seat 4a and the arm body 1, that is, it improves the stability of the connection between the ball pin assembly 4 and the arm body 1.

[0028] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A swing arm assembly comprising an arm body (1) and a ball pin assembly (4), the arm body (1) comprising a housing (la), a ball seat (4a) of the ball pin assembly (4) comprising a ball seat body (4al), an outer circumferential surface of the ball seat body (4al) abutting on the housing (la) and being welded and fixed, characterized in that, The arm body (1) further comprises a sub-plate (1b) which is covered and welded on the shell (1a), the outer circumferential surface of the ball seat main body (4a1) is further attached to the outer circumferential surface of the sub-plate (1b) and welded, the ball seat (4a) of the ball pin assembly (4) further comprises a connecting plate (4a2) which is integrally arranged and protrudes on the outer circumferential surface of the ball seat main body (4a1), the connecting plate (4a2) is inserted between the shell (1a) and the sub-plate (1b), the outer circumferential surface of the connecting plate (4a2) and the inner surface of the sub-plate (1b) have a first welding seam (5), the sub-plate (1b) has a welding hole (1b1) corresponding to the connecting plate (4a2), the side of the connecting plate (4a2) facing the sub-plate (1b) and the hole wall surface of the welding hole (1b1) have a second welding seam (6).

2. The swing arm assembly of claim 1, wherein, The connecting plate (4a2) is quadrilateral, one side of the connecting plate (4a2) is integrally connected with the outer circumferential surface of the ball seat main body (4a1), the first welding seam (5) is located on the side of the connecting plate (4a2) away from the ball seat main body (4a1), and the connecting plate (4a2) has a positioning welding seam (7) between the two sides adjacent to the ball seat main body (4a1) and the inner surface of the sub-plate (1b).

3. The swing arm assembly of claim 2, wherein, The side of the connecting plate (4a2) away from the ball seat main body (4a1) is an arc shape recessed towards the ball seat main body (4a1).

4. The swing arm assembly of any of claims 1-3, wherein, The shell (1a) has a surrounding wall (1a1) at the outer edge, and the outer edge of the sub-plate (1b) is welded and fixed with the surrounding wall (1a1).

5. The swing arm assembly of any of claims 1-3, wherein, The ball seat main body (4a1) is cylindrical, and the connecting plate (4a2) is perpendicular to the axis of the ball seat main body (4a1).

Images