Spring arm structure and vehicle

Abstract

The utility model discloses a spring arm structure and a vehicle, the spring arm structure comprises a spring arm lower plate, the two ends of the spring arm lower plate are respectively provided with a connecting support and a lining, a lining sleeve is arranged in the lining, the upper end of the spring arm lower plate is fixedly connected with a spring arm upper plate, and the middle part of the spring arm lower plate is provided with a limiting seat; by adopting the spring arm structure, the arrangement and assembly requirements are met, the development cost is reduced, and the structural performance is reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts. Specifically, the utility model relates to a spring arm structure and a vehicle. Background Art

[0002] One end of a spring arm is usually connected to a vehicle frame, a subframe or a vehicle body, and the other end is connected to a brake steering knuckle. It transmits forces and torques between the wheel and the vehicle frame, and its layout form and dimensions determine the motion characteristics of the suspension system. The current spring arm has a simple structure, cannot meet the layout requirements of coil springs and air springs, and cannot fix the wire harness of the wheel speed sensor; since the spring arm has to bear torque and transmit traction force, braking force and lateral force, the existing spring arm cannot meet the strength and stiffness requirements.

[0003] The invention patent with the publication number of CN110816185A was published on February 21, 2020, with the name of a novel rear lower spring arm, which includes a left arm, a right arm and a back plate. The bottom of the left arm is welded to the back plate, the top of the back plate is welded to the right arm, the top of the left arm is integrally formed with a left arm inclined plate, and a left arm hole is provided on the left side wall of the left arm inclined plate. The top of the right arm is integrally formed with a right arm inclined plate. This rear lower spring arm also cannot solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a spring arm structure that meets the layout and assembly requirements and has reliable structural performance in view of the deficiencies of the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] This spring arm structure includes a spring arm lower plate. Connecting brackets and bushings are respectively provided at both ends of the spring arm lower plate. A bushing sleeve is provided inside the bushing. The upper end of the spring arm lower plate is fixedly connected with a spring arm upper plate, and a limit seat is provided in the middle of the spring arm lower plate.

[0007] The middle part of the spring arm lower plate is of a circular groove structure, the limit seat is of a tubular structure, and a connecting platform is provided at the bottom of the limit seat.

[0008] A first wire harness fixing bracket is provided on the side of the spring arm lower plate, a second wire harness fixing bracket is provided on the side of the spring arm upper plate. The first wire harness fixing bracket is of an L-shaped structure, and the end of the second wire harness fixing bracket protrudes beyond the outer edge of the flanging.

[0009] A flanging is provided at the upper end edge of the spring arm lower plate.

[0010] Avoidance openings are provided at one ends of the spring arm upper plate and the spring arm lower plate close to the connecting bracket, and the avoidance openings are arc-shaped.

[0011] One end of the lower spring arm plate close to the connecting bracket is provided with a first positioning hole, which is an oblong hole; one end of the upper spring arm plate close to the bushing is provided with a second positioning hole, which is a round hole.

[0012] The lower spring arm plate is further provided with a buffer pad positioning hole and a liquid leakage hole.

[0013] The side part of the lower spring arm plate is provided with a weight reduction hole.

[0014] A vehicle, comprising the above-mentioned spring arm structure.

[0015] The technical effect of the present utility model is as follows: By adopting the spring arm structure of the present utility model, a limit seat is arranged on the lower spring arm plate to meet the layout and assembly requirements of the helical spring and the air spring, realizing platform development and saving development costs; Structures such as the upper spring arm plate and the flanging are arranged to improve the structural performance of the spring arm and meet the requirements of strength and stiffness; The wiring harness of the wheel speed sensor is fixed by arranging a wiring harness fixing bracket, and the spring arm structure also has the advantages of compact structure and convenient installation. Description of the Drawings

[0016] This specification includes the following drawings, and the shown contents are respectively:

[0017] Figure 1 is a three-dimensional structural schematic diagram of the spring arm structure of the present utility model;

[0018] Figure 2 is a top view structural schematic diagram of the spring arm structure of the present utility model.

[0019] The markings in the figure are: 1. Lower spring arm plate; 2. Upper spring arm plate; 3. Connecting bracket; 4. Bushing; 5. Bushing sleeve; 6. Limit seat; 7. Connecting platform; 8. Flanging; 9. Avoidance opening; 10. Weight reduction hole; 11. First wiring harness fixing bracket; 12. Second wiring harness fixing bracket; 13. First positioning hole; 14. Second positioning hole; 15. Buffer pad positioning hole; 16. Liquid leakage hole. Detailed Description of the Invention

[0020] Next, with reference to the drawings, through the description of the embodiments, the specific embodiments of the present utility model will be further described in detail. The purpose is to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0021] As Figure 1 and Figure 2As shown in the figure, the spring arm structure includes a lower spring arm plate 1. At both ends of the lower spring arm plate 1, there are respectively a connecting bracket 3 and a bushing 4. Inside the bushing 4, there is a bushing sleeve 5. At the upper end of the lower spring arm plate 1, there is a fixed connection with an upper spring arm plate 2. In the middle of the lower spring arm plate 1, there is a limit seat 6. The connecting bracket 3 and the bushing 4 are respectively used to connect the rear subframe and the steering knuckle. The lower spring arm plate 1 mainly plays the role of supporting the coil spring and the air spring. In order to facilitate accurate installation and avoid the risk of the coil spring or the air spring coming off, a limit seat 6 is added on the lower spring arm plate 1 to meet the layout and assembly of the coil spring and the air spring, realizing platform development, thereby saving development costs; the upper spring arm plate 2 plays a strengthening role in the spring arm structure, improving the structural strength and stiffness of the spring arm, so as to meet the required load-bearing capacity and torque transmission requirements; the bushing 4 is defined according to the installation dimensions of the mating part and is combined with the spring arm body by press-fitting, which is convenient for assembly and can ensure good handling stability and ride comfort of the whole vehicle. The material of the bushing sleeve 5 is rubber, which has the advantages of vibration isolation performance, elastic characteristics and attenuation characteristics. Each component in the spring arm is electrophoresed and then the bushing 4 is press-fitted to form an assembled component, simultaneously meeting the layout and assembly space of the coil spring and the air spring.

[0022] As Figure 1 and Figure 2 shown in the figure, the middle part of the lower spring arm plate 1 is a circular groove structure, the limit seat 6 is a tubular structure, and at the bottom of the limit seat 6, there is a connecting platform 7. The structure of the upper spring arm plate 2 is adapted to the shape of the spring. When the spring is installed, the bottom of the spring is located inside the circular groove, which is beneficial to keeping the installed coil spring or air spring in a stable posture; the limit seat 6 is designed as a tubular structure, which not only facilitates the assembly with the protruding part at the bottom of the air spring, but also has a radial constraint function on the spring, achieving a limiting effect and reducing the weight. The setting of the connecting platform 7 expands the connection area between the limit seat 6 and the lower spring arm plate 1, improving the stability of the limit seat 6.

[0023] As Figure 1 shown in the figure, on the side of the lower spring arm plate 1, there is a first wire harness fixing bracket 11, and on the side of the upper spring arm plate 2, there is a second wire harness fixing bracket 12. The first wire harness fixing bracket 11 is an L-shaped structure, and the end of the second wire harness fixing bracket 12 protrudes beyond the outer edge of the flanging 8. The first wire harness fixing bracket 11 and the second wire harness fixing bracket 12 provide fixed positions for the wire harness of the wheel speed sensor, playing a guiding, limiting and fixing role for the wire harness, avoiding the disturbance of the wire harness, and preventing the wire harness from being physically damaged externally. During subsequent maintenance, the maintenance personnel can easily identify the wire harness and find the parts to be repaired more quickly. And both the first wire harness fixing bracket 11 and the second wire harness fixing bracket 12 are located at the outer position of the spring arm and will not affect the normal functions of the coil spring or the air spring. Both the first wire harness fixing bracket 11 and the second wire harness fixing bracket 12 are fixed to the spring arm by welding.

[0024] AsFigure 1 As shown in the figure, a flanging 8 is provided at the upper edge of the upper end of the spring arm lower plate 1. The spring arm upper plate 2 strengthens the inner side of the spring arm lower plate 1. The flanging 8 enables a smooth transition of the outer edge of the spring arm lower plate 1, reduces stress concentration, and has a strengthening effect. The two together improve the strength and stiffness of the spring arm.

[0025] As Figure 1 shown in the figure, avoidance openings 9 are provided at one end of the spring arm upper plate 2 and the spring arm lower plate 1 close to the connection bracket 3, and the avoidance openings 9 are arc-shaped. The avoidance openings 9 can reduce the spatial interference between the spring arm and the rear subframe, and the avoidance openings 9 are beneficial to shortening the length of the spring arm, providing more space for the rear subframe to give way, reducing material costs, and setting it as an arc can reduce stress concentration at the avoidance openings 9.

[0026] As Figure 1 and Figure 2 shown in the figure, a first positioning hole 13 is provided at one end of the spring arm lower plate 1 close to the connection bracket 3. The first positioning hole 13 is an oval hole, and a second positioning hole 14 is provided at one end of the spring arm upper plate 2 close to the bushing 4. The second positioning hole 14 is a round hole. The above two positioning holes are located at both ends of the spring arm, facilitating the installation and positioning of the spring arm with the rear subframe and the steering knuckle.

[0027] As Figure 2 shown in the figure, a buffer pad positioning hole 15 and a liquid leakage hole 16 are also provided on the spring arm lower plate 1. The buffer pad positioning hole 15 is used to position the buffer pad, thereby reducing the assembly difficulty, and the liquid leakage hole 16 is used to discharge the electrophoresis liquid in the electrophoresis process.

[0028] As Figure 1 shown in the figure, a weight reduction hole 10 is provided on the side of the spring arm lower plate 1. Multiple weight reduction holes 10 are provided on the spring arm lower plate 1 to reduce the overall weight, meeting the design requirements of vehicle lightweighting.

[0029] A vehicle, including the above spring arm structure.

[0030] In this spring arm structure, a limit seat 6 is provided on the spring arm lower plate 1 to meet the layout and assembly requirements of the coil spring and the air spring, realize platform development, and save development costs; structures such as the spring arm upper plate 2 and the flanging 8 are provided to improve the structural performance of the spring arm and meet the strength and stiffness requirements; the wiring harness fixing of the wheel speed sensor is realized by setting a wiring harness fixing bracket. This spring arm structure also has the advantages of compact structure and convenient installation.

[0031] The above has made an exemplary description of the present utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model; or without improvement, the above concept and technical solution of the present utility model are directly applied to other occasions, they are all within the protection scope of the present utility model.

Claims

1. A spring arm structure, characterized in that: The invention comprises a spring arm lower plate (1), wherein two ends of the spring arm lower plate (1) are respectively provided with a connecting bracket (3) and a bushing (4), wherein a bushing sleeve (5) is provided inside the bushing (4), wherein the upper end of the spring arm lower plate (1) is fixedly connected to a spring arm upper plate (2), and a limit seat (6) is provided in the middle of the spring arm lower plate (1); a first wire harness fixing frame (11) is provided on the side of the spring arm lower plate (1), and a second wire harness fixing frame (12) is provided on the side of the spring arm upper plate (2), wherein the first wire harness fixing frame (11) is an L-shaped structure, and the end of the second wire harness fixing frame (12) extends out of the outer edge of the flange (8).

2. The spring arm structure according to claim 1, characterized in that: The middle part of the lower plate (1) of the spring arm is a circular groove structure, the limiting seat (6) is a tubular structure, and a connecting platform (7) is provided at the bottom of the limiting seat (6).

3. The spring arm structure according to claim 2, characterized in that: The upper edge of the spring arm lower plate (1) is provided with a flange (8).

4. The spring arm structure according to claim 3, characterized in that: The spring arm upper plate (2) and the spring arm lower plate (1) are both provided with an avoidance opening (9) at one end close to the connecting bracket (3), and the avoidance opening (9) is arc-shaped.

5. The spring arm structure according to claim 4, characterized in that: A first positioning hole (13) is provided at one end of the spring arm lower plate (1) close to the connecting bracket (3), and the first positioning hole (13) is a waist-shaped hole. A second positioning hole (14) is provided at one end of the spring arm upper plate (2) close to the bushing (4), and the second positioning hole (14) is a round hole.

6. The spring arm structure according to claim 5, characterized in that: The spring arm lower plate (1) is also provided with a buffer pad positioning hole (15) and a liquid leakage hole (16).

7. The spring arm structure according to claim 6, characterized in that: A weight-reducing hole (10) is provided on the side of the spring arm lower plate (1).

8. A vehicle, characterized in that: The invention comprises the spring arm structure as described in any one of claims 1 to 7.

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