Lower swing arm of double-wishbone suspension of passenger car

Abstract

The utility model relates to the technical field of swing arms of passenger cars, and discloses a lower swing arm of a double-wishbone suspension of a passenger car, which comprises a swing arm body, a connecting rod connected with a bulb at the end of the swing arm body, a bulb at the lower end of the connecting rod, and a spherical groove matched with the bulb at the end of the swing arm body. A detachable limiting plate is connected to the portion, above the spherical groove, of the swing arm body, the limiting plate is fixedly connected with the swing arm body through a plurality of screws, a limiting bush is connected to the portion, above the spherical groove, of the lower portion of the limiting plate, and a groove matched with the limiting bush is formed in the portion, above the spherical groove, of the swing arm body. The swing arm body is provided with a compression-resistant groove and a tensile groove, a plurality of compression-resistant structures are arranged in the compression-resistant groove, and a first spring is connected into the tensile groove. The utility model has the advantages that the lower swing arm is provided with a compression-resistant structure, and the ball head is convenient to replace and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of bus swing arms, and specifically refers to a lower swing arm of a double-wishbone suspension for buses. Background Technique

[0002] The lower swing arm of a bus double-wishbone suspension usually refers to the active lower control arm in the suspension system. This component is an important part connecting the wheel and the vehicle body. Through it, the wheel is supported, and at the same time, the wheel can move in the vertical direction to adapt to the uneven road surface.

[0003] Compared with cars, the lower swing arm of a bus double-wishbone suspension must bear greater forces and loads. This is mainly because buses usually carry more weight, and the suspension system needs to support the weight of the entire vehicle body and the load of passengers. However, at the same time, the ball joint of the lower swing arm is easily affected by cavity extrusion, which may cause the cavity to expand, or even cause the ball joint to fall off, posing a risk of suspension failure. Frequent replacement of the ball joint is not only costly but also may affect the safety performance and stability of the vehicle. In addition, if the lower swing arm lacks sufficient compressive structure support, there is also a risk of fracture, which may lead to serious consequences and even endanger the safety of drivers and passengers. Content of the Utility Model

[0004] In order to solve the above various problems, the utility model proposes a lower swing arm of a bus double-wishbone suspension with a compressive structure on the lower swing arm and convenient replacement and maintenance at the ball joint.

[0005] To solve the above technical problems, the technical solution proposed by the utility model is: a lower swing arm of a bus double-wishbone suspension, including a swing arm body. A connecting rod is connected to the end of the swing arm body by a ball joint. A ball joint is provided at the lower end of the connecting rod. A spherical groove for mating with the ball joint is provided at the end of the swing arm body. A detachable limiting plate is connected above the spherical groove on the swing arm body. The limiting plate is fixedly connected to the swing arm body by a plurality of screws. A limiting bushing is connected around the spherical groove below the limiting plate. A groove for mating with the limiting bushing is provided around the spherical groove above the swing arm body. A compressive groove and a tensile groove are provided on the swing arm body. A plurality of compressive structures are provided in the compressive groove. A first spring is connected in the tensile groove.

[0006] Further, an activity hole for mating with the connecting rod is provided on the limiting plate.

[0007] Based on the above features, it is convenient for the connecting rod to move to achieve flexible rotation between the swing arm body and the vehicle body. At the same time, the activity hole can also limit the rotation amplitude of the connecting rod, which is beneficial to reducing the wear of the spherical groove.

[0008] Further, the inner side of the limit bushing is an arc surface that fits with the ball head, and the inner side wall of the limit bushing and the wall of the spherical groove have the same radian and are connected to each other.

[0009] Based on the above features, it can ensure smooth rotation of the ball head and good connection stability.

[0010] Further, stabilizing strips are integrally formed on both the upper and lower edges of the swing arm body, and the stabilizing strips are arranged along the edge line of the swing arm body.

[0011] Based on the above features, the stabilizing strips can reinforce the swing arm body and further increase the compressive resistance of the swing arm body.

[0012] Further, the compression-resistant structure includes telescopic rods and the second springs. A plurality of telescopic rods and the second springs are evenly spaced and arranged perpendicular to the direction of the compression-resistant groove. The second springs are sleeved outside the telescopic rods, and both ends of the second springs and both ends of the telescopic rods are connected to the inner side wall of the compression-resistant groove.

[0013] Based on the above features, the evenly arranged telescopic rods and the second springs can effectively absorb the lateral pressure on the swing arm body, thereby improving the compression-resistant ability of the swing arm body.

[0014] Further, the first spring is in the same direction as the tensile-resistant groove, and both ends of the first spring are respectively connected to both ends of the inner wall of the tensile-resistant groove.

[0015] Based on the above features, the first spring can effectively absorb the longitudinal pressure on the swing arm body and further increase the compression-resistant and tensile-resistant abilities of the swing arm body.

[0016] The advantages of the present utility model compared with the prior art are as follows: The swing arm body is provided with a compression-resistant groove and a tensile-resistant groove, which cooperate with the compression-resistant structure and the first spring inside it to slow down or absorb the impact and pressure from the suspension system, which is beneficial to improving the compression-resistant ability and tensile-resistant ability, making the overall strength higher. The setting of the detachable limit plate and limit bushing can further limit the ball head, ensuring the stability and accuracy of the ball head during the movement of the swing arm. Moreover, the limit plate is connected and fixed to the swing arm body by screws, which is convenient to disassemble and replace the limit bushing with the limit plate after the limit bushing is worn, without replacing the entire ball head and its connection structure, which is beneficial to reducing costs and is convenient and practical. Description of the Drawings

[0017] Figure 1 is a perspective view of the present utility model;

[0018] Figure 2 is a top view of the present utility model;

[0019] Figure 3 is a front view of the present utility model;

[0020] Figure 4It is a cross-sectional view of the spherical groove part of the present utility model.

[0021] As shown in the figure: 1. Swing arm body; 2. Connecting rod; 3. Ball head; 4. Spherical groove; 5. Limit plate; 6. Screw; 7. Limit bushing; 8. Compression groove; 9. Tensile groove; 10. Spring 1; 11. Stabilizing strip; 12. Telescopic rod; 13. Spring 2. Specific embodiments

[0022] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Combined with the attached Figure 1 、attached Figure 3 、attached Figure 4 A lower swing arm of a bus double-wishbone suspension includes a swing arm body 1. A connecting rod 2 is connected to the end of the swing arm body 1 by a ball joint. A ball head 3 is provided at the lower end of the connecting rod 2. A spherical groove 4 for cooperating with the ball head 3 is provided at the end of the swing arm body 1. A detachable limit plate 5 is connected above the spherical groove 4 on the swing arm body 1. The limit plate 5 is fixedly connected to the swing arm body 1 by a plurality of screws 6. An activity hole for cooperating with the connecting rod 2 is provided on the limit plate 5, which facilitates the activity of the connecting rod 2 to realize the flexible rotation between the swing arm body 1 and the vehicle body. At the same time, the activity hole can also limit the rotation amplitude of the connecting rod 2, which is beneficial to reducing the wear of the spherical groove 4.

[0024] Combined with the attached Figure 4 Below the limit plate 5 and around the upper part of the spherical groove 4, a limit bushing 7 is connected. Grooves for cooperating with the limit bushing 7 are provided around the upper part of the spherical groove 4 on the swing arm body 1. The inner side of the limit bushing 7 is an arc surface for cooperating with the activity of the ball head 3. The inner side wall of the limit bushing 7 and the groove wall of the spherical groove 4 have the same radian and are connected to each other, which can ensure the smooth rotation of the ball head 3 and good connection stability.

[0025] Combined with the attached Figure 1 、attached Figure 2 On the swing arm body 1, a compression groove 8 and a tensile groove 9 are provided. A plurality of compression structures are provided in the compression groove 8. The compression structures include telescopic rods 12 and spring 2 13. The telescopic rods 12 and spring 2 13 are both provided in a plurality at equal intervals and are arranged perpendicular to the direction of the compression groove 8. The spring 2 13 is sleeved outside the telescopic rod 12. Both ends of the spring 2 13 and both ends of the telescopic rod 12 are connected to the inner side wall of the compression groove 8. The uniformly arranged telescopic rods 12 and spring 2 13 can effectively absorb the pressure in the transverse direction of the swing arm body 1, thereby improving the compression resistance of the swing arm body 1.

[0026] Combined with the attached Figure 1 、attached Figure 2, a first spring 10 is connected inside the tensile groove 9. The first spring 10 is in the same direction as the tensile groove 9, and both ends of the first spring 10 are respectively connected to both ends of the inner wall of the tensile groove 9. The first spring 10 can effectively absorb the pressure in the longitudinal direction of the swing arm body 1, and further increase the compressive and tensile resistance of the swing arm body 1.

[0027] Combined with the attached Figure 1 , attached Figure 2 , stabilizing strips 11 are integrally formed at the upper and lower edges of the swing arm body 1. The stabilizing strips 11 are arranged along the edge line of the swing arm body 1. The stabilizing strips 11 can reinforce the swing arm body 1 and further increase the compressive resistance of the swing arm body 1.

[0028] Specific embodiments of the present invention: The limit plate 5 is sleeved on the connecting rod 2 and fixed on the swing arm body 1 above the spherical groove 4 by using screws 6, so that the limit bushing 7 is located in the groove to limit the ball head 3. The swing arm body 1 is installed at a suitable position on the vehicle body. The connecting rod 2 is connected to the vehicle body. During the driving of the vehicle body, the connecting rod 2 will rotate relative to the swing arm body 1. At the same time, the ball head 3 rotates in cooperation with the spherical groove 4. During the working process of the swing arm body 1, the first spring 10, the telescopic rod 12 and the second spring 13 can share the pressure in the transverse and longitudinal directions of the swing arm body 1, improve the compressive and tensile resistance of the swing arm body 1, and ensure its stability. As the swing arm body 1 works for a long time, the spherical groove 4 and the limit bushing 7 will wear. At this time, the connecting rod 2 is separated from the vehicle body, the screws 6 are removed, the limit plate 5 is removed, and the limit plate 5 with a new limit bushing 7 is replaced.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; for those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood according to specific situations.

[0030] The above describes the present invention and its embodiments. This description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural forms and embodiments without creative efforts without departing from the creative purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A lower swing arm of a double wishbone suspension of a passenger car, comprising a swing arm body (1), characterized in that: The end of the swing arm body (1) is connected to a connecting rod (2) with a ball head (3), and the lower end of the connecting rod (2) is provided with a ball head (3). The end of the swing arm body (1) is provided with a spherical groove (4) matching the ball head (3). The swing arm body (1) is provided with a detachable limit plate (5) located above the spherical groove (4). The limit plate (5) is connected and fixed to the swing arm body (1) by a plurality of screws (6). A limit bushing (7) is connected to the lower part of the limit plate (5) and located above the spherical groove (4). The swing arm body (1) is provided with grooves matching the limit bushing (7) and located above the spherical groove (4). The swing arm body (1) is provided with a compression groove (8) and a tensile groove (9). The compression groove (8) is provided with a plurality of compression structures, and the tensile groove (9) is connected with a spring (10).

2. The lower arm of the double wishbone suspension for a passenger car according to claim 1, characterized in that: The limiting plate (5) is provided with a movable hole which matches the connecting rod (2).

3. The lower arm of the double wishbone suspension for a passenger car according to claim 1, characterized in that: The inner side of the limiting bushing (7) is an arc surface that cooperates with the movement of the ball head (3), and the inner side wall of the limiting bushing (7) and the groove wall of the spherical groove (4) have the same arc and are connected to each other.

4. The lower arm of the double wishbone suspension for a passenger car according to claim 1, characterized in that: Stabilizing strips (11) are integrally formed at the upper and lower edges of the swing arm body (1), and the stabilizing strips (11) are arranged along the edge line of the swing arm body (1).

5. The lower arm of the double wishbone suspension for a passenger car according to claim 1, characterized in that: The pressure-resistant structure comprises a telescopic rod (12) and a second spring (13). The telescopic rod (12) and the second spring (13) are evenly spaced and arranged perpendicular to the direction of the pressure-resistant groove (8). The second spring (13) is sleeved on the outside of the telescopic rod (12). Both ends of the second spring (13) and both ends of the telescopic rod (12) are connected to the inner wall of the pressure-resistant groove (8).

6. The lower arm of the double wishbone suspension for a passenger car according to claim 1, characterized in that: The spring one (10) is in the same direction as the anti-tension groove (9), and the two ends of the spring one (10) are respectively connected to the two ends of the inner wall of the anti-tension groove (9).

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