Automobile plate spring torsion beam suspension and automobile

Abstract

The utility model discloses an automobile leaf spring torsion beam suspension and an automobile, the automobile leaf spring torsion beam suspension comprises a leaf spring body and a torsion beam body, the leaf spring body is in an arch structure, and two ends of the leaf spring body are respectively provided with a lining; the longitudinal arms are arranged at the two ends of the torsion beam body respectively, the plate spring body is connected with the longitudinal arms at the two ends of the torsion beam body through the linings at the two ends of the plate spring body through bolts, and the middle position of the top of the plate spring body is connected with the bottom of a vehicle body through a plate spring support. According to the automobile plate spring torsion beam suspension, the plate spring is used for replacing a spiral spring to be applied to an automobile, compared with a spiral spring suspension, the torsion beam suspension of the plate spring is simple in structural design, the limiting effect or the elastic effect can be achieved in the horizontal direction, the manufacturability and the maintainability of the suspension can be improved, and the production cost is reduced. And the driving stability of the automobile can be improved, and the driving experience of the automobile is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile suspensions, and in particular relates to an automobile leaf spring torsion beam suspension and an automobile. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] The trend of automobile electrification has been accelerating in recent years, and electric vehicles have an extremely strong demand for driving range. Electric vehicles contain battery packs with high energy density and heavy weight, so the vehicle suspension needs to have sufficient rigidity and strength to bear the weight of the battery pack. Further, the suspension weight needs to be reduced to make the battery of electric vehicles larger and the vehicle run farther.

[0004] The torsion beam rear suspension assembly is a common type of rear suspension on passenger cars. It connects the left and right wheels together through the middle torsion beam, balances the up and down bounce of the wheels, and reduces the shaking of the wheels. In the prior art, Chinese utility model patent CN207190699U discloses a torsion beam suspension for automobiles, which uses two springs of different diameters and lengths, and sleeves the longer spring inside the thicker spring as a buffer component. Although it can improve the stability of the buffer device to a certain extent, when the torsion beam is subjected to lateral force, the spring is easy to fall off the body due to uneven force. In addition, the spring can only play an elastic role in the vertical direction, and has no limiting or elastic effect in the horizontal direction. Utility Model Content

[0005] The utility model aims to provide an automobile leaf spring torsion beam suspension and an automobile, which can improve the driving stability of the automobile.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] In the first aspect, an embodiment of the utility model provides an automobile leaf spring torsion beam suspension, comprising a leaf spring body and a torsion beam body, wherein the leaf spring body is an arched structure, and bushings are respectively provided at both ends of the leaf spring body; longitudinal arms are respectively provided at both ends of the torsion beam body, and the bushings at both ends of the leaf spring body connect the leaf spring body and the longitudinal arms at both ends of the torsion beam body through bolts, and the middle position of the top of the leaf spring body is connected to the bottom of the vehicle body through a leaf spring bracket.

[0008] As a further technical solution, the leaf spring body is made of a glass fiber reinforced composite material.

[0009] As a further technical solution, shock absorbers are respectively provided on the longitudinal arms at both ends of the torsion beam body.

[0010] As a further technical solution, the longitudinal arm is a cylindrical structure, and the bushings at both ends of the leaf spring body are installed on the upper surface of the longitudinal arm by bolts.

[0011] As a further technical solution, a bolt hole is provided at the center of the bushing, and bolts pass through the bolt holes on the bushing and the bolt holes on the longitudinal arm to install the leaf spring body and the torsion beam body.

[0012] As a further technical solution, a through hole is provided at the bottom of the leaf spring bracket, and the leaf spring body passes through the through hole.

[0013] As a further technical solution, the width and height of the through hole match the width and height of the leaf spring body respectively.

[0014] As a further technical solution, a mounting shaft is provided on the top of the leaf spring bracket, and the mounting shaft is fixed to the upper surface of the leaf spring bracket through a cushion block.

[0015] As a further technical solution, hub connecting plates are welded on the outer sides of the longitudinal arms at both ends of the torsion beam body.

[0016] In a second aspect, an embodiment of the present utility model provides an automobile, comprising the automobile leaf spring torsion beam suspension of the first aspect.

[0017] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:

[0018] The automobile leaf spring torsion beam suspension provided by the utility model utilizes leaf springs instead of coil springs and is applied to the automobile. Compared with the coil spring suspension, the leaf spring torsion beam suspension has a simple structure design and can play a limiting or elastic role in the horizontal direction, which is beneficial to improving the manufacturability and maintainability of the suspension, and can also improve the driving stability of the automobile and enhance the driving experience of the automobile.

[0019] The automobile leaf spring torsion beam suspension provided by the utility model adopts a glass fiber reinforced composite material to replace the metal material in the leaf spring body, and its weight is much lower than that of the metal leaf spring. While ensuring the reliability of the leaf spring, the weight can be reduced by 60%; in addition, the composite leaf spring can provide a safety fracture warning. When the automobile works in an extremely harsh environment, the composite leaf spring will slowly crack along the length direction, but can still keep the position of the shaft unchanged to ensure the safety of the vehicle and passengers.

[0020] The automobile leaf spring torsion beam suspension provided by the utility model realizes connection between the leaf spring body and the torsion beam body through the provided bushing and bolts, and the connection structure has the advantages of simple structure and convenient installation.

[0021] The automobile leaf spring torsion beam suspension provided by the utility model connects the middle position of the leaf spring body with the vehicle body by means of a leaf spring bracket, which can improve the stability of the leaf spring installation and ensure that the leaf spring is evenly stressed. Compared with the existing installation structure that requires opening installation holes on the leaf spring, the influence of the opening holes on the strength of the leaf spring can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 It is a structural schematic diagram of the leaf spring of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the leaf spring torsion beam suspension of the utility model;

[0025] Figure 3 It is the stiffness simulation result of the existing helical spring suspension and the leaf spring suspension of the utility model when the wheels bounce in the same direction, wherein the solid line is the helical spring suspension and the dotted line is the leaf spring suspension;

[0026] Figure 4 It is the stiffness simulation result of the existing coil spring suspension and the leaf spring suspension of the utility model when the wheel bounces in the opposite direction, wherein the solid line is the coil spring suspension and the dotted line is the leaf spring suspension;

[0027] Figure 5 These are the lateral force simulation results of the existing coil spring suspension and the leaf spring suspension of the present invention, wherein the solid line represents the coil spring suspension and the dotted line represents the leaf spring suspension.

[0028] The schematic diagram is for illustrative purposes only;

[0029] Among them, 1. leaf spring body; 2. first bushing; 3. second bushing; 4. leaf spring bracket; 401. through hole; 402. mounting shaft; 403. pad; 5. first shock absorber; 6. second shock absorber; 7. torsion beam body. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0031] Example 1

[0032] In a typical implementation of the present invention, Figure 1 and Figure 2As shown, a vehicle leaf spring torsion beam suspension is provided, comprising a leaf spring body 1 and a torsion beam body 7, wherein the leaf spring body 1 is an arched structure, and bushings are respectively provided at both ends of the leaf spring body 1, namely a first bushing 2 and a second bushing 3; longitudinal arms are respectively provided at both ends of the torsion beam body 7, and the bushings at both ends of the leaf spring body 1 connect the leaf spring body 1 with the longitudinal arms at both ends of the torsion beam body 7 through bolts, and the middle position of the top of the leaf spring body 1 is connected to the bottom of the vehicle body through a leaf spring bracket 4.

[0033] In this embodiment, the leaf spring body is made of glass fiber reinforced composite material. By using glass fiber reinforced composite material instead of metal material, its weight is much lower than that of metal leaf spring. While ensuring the reliability of leaf spring, the weight can be reduced by 60%. In addition, the fatigue life of composite leaf spring is significantly improved. The fatigue life of traditional leaf spring is 160,000 times, and the fatigue life of composite leaf spring is about 300,000 times, which is 87.5% higher. Finally, composite leaf spring will provide safety fracture warning. When the car is working in an extremely harsh environment, the composite leaf spring will slowly crack along the length direction, but it can still keep the position of the axis unchanged to ensure the safety of the vehicle and passengers.

[0034] In this embodiment, shock absorbers are respectively arranged on the longitudinal arms at both ends of the torsion beam body 7, namely the first shock absorber 5 and the second shock absorber 6. Hub connecting plates are welded on the outer surfaces of the longitudinal arms at both ends of the torsion beam body, and the shock absorbers play a shock absorbing role through the hub connecting plates.

[0035] In this embodiment, the longitudinal arm is a cylindrical structure, and the bushings at both ends of the leaf spring body are installed on the upper surface of the longitudinal arm by bolts. A bolt hole is provided at the center position of the bushing. The bolts pass through the bolt holes on the bushing and the bolt holes on the longitudinal arm to install the leaf spring body and the torsion beam body. The longitudinal arm on the torsion beam body 7 is circumferentially limited by the bushing. This connection method is simple and easy to assemble.

[0036] In this embodiment, the contact portion between the leaf spring body and the rigid bushing is as flat as possible to facilitate the subsequent installation of the leaf spring bracket.

[0037] In this embodiment, the leaf spring bracket is a rectangular structure, and a through hole 401 is provided at the bottom of the leaf spring bracket 4, and the through hole 401 passes through the leaf spring body 1, and the leaf spring bracket 4 is at the highest position of the arched structure of the leaf spring body. Further, the width and height of the through hole 401 respectively match the width and height of the leaf spring body, and the leaf spring body can be wrapped in the circumferential direction through the set through hole; further, a mounting shaft 402 is provided at the top of the leaf spring bracket 4, and the mounting shaft 402 is fixed to the upper surface of the leaf spring bracket 4 through a pad 403. The leaf spring body is installed on the vehicle body through the set leaf spring bracket. The leaf spring bracket is made of the leaf spring body in a wrapping manner. Compared with the existing structure, there is no need to set additional mounting holes and other structures on the leaf spring body, which will not affect the strength of the leaf spring. At the same time, the leaf spring bracket 4 is set in the middle position of the leaf spring body, so that the leaf spring is evenly dispersed to both sides during the force-bearing process, thereby improving the uniformity of the force on the leaf spring.

[0038] Furthermore, in order to prevent the leaf spring from being slightly displaced with the leaf spring bracket during the force-bearing process and causing wear to the leaf spring, a flexible cushion layer is arranged in the through hole on the leaf spring bracket. The flexible cushion layer is made of polymer material (such as rubber cord cloth), which is beneficial to the lightweight effect. After contacting with the leaf spring body 1, the friction force is large and damage to the composite body 1 can be avoided.

[0039] The leaf spring suspension provided in this embodiment and the coil spring suspension in the prior art are simulated by using ADAMS suspension simulation software to simulate the stiffness of the leaf spring torsion beam suspension and the coil spring torsion beam suspension. After adjusting the stiffness curves of the two suspensions to roughly coincide, the stiffness adjustment curve is as shown in the attached figure. Figure 3 and attached Figure 4 The simulation results of the lateral force of the leaf spring torsion beam suspension and the coil spring torsion beam suspension are shown in the attached figure. Figure 5 As shown, the performance of the helical spring torsion beam suspension and the leaf spring torsion beam suspension is compared. Through the analysis of the simulation results, when the helical spring torsion beam suspension and the leaf spring torsion beam suspension achieve the same stiffness effect. When the leaf spring suspension is subjected to the same lateral force, the side slip angle it produces is smaller, the side slip stiffness is greater, it is less likely to oversteer during driving, the vehicle driving stability is better, and the performance of the torsion beam suspension is improved.

[0040] Example 2

[0041] In a typical implementation of the utility model, an automobile is provided, comprising the automobile leaf spring torsion beam suspension described in Example 1.

[0042] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An automobile leaf spring torsion beam suspension, characterized in that: It includes a leaf spring body and a torsion beam body. The leaf spring body is an arched structure. Bushings are respectively provided at both ends of the leaf spring body. Longitudinal arms are respectively provided at both ends of the torsion beam body. The bushings at both ends of the leaf spring body connect the leaf spring body with the longitudinal arms at both ends of the torsion beam body through bolts. The middle position of the top of the leaf spring body is connected to the bottom of the vehicle body through a leaf spring bracket.

2. The automobile leaf spring torsion beam suspension according to claim 1, characterized in that: The leaf spring body is made of a glass fiber reinforced composite material.

3. The automobile leaf spring torsion beam suspension according to claim 1, characterized in that: Shock absorbers are respectively arranged on the longitudinal arms at both ends of the torsion beam body.

4. The automobile leaf spring torsion beam suspension according to claim 1, characterized in that: The longitudinal arm is a cylindrical structure, and the bushings at both ends of the leaf spring body are installed on the upper surface of the longitudinal arm through bolts.

5. The automobile leaf spring torsion beam suspension according to claim 4, characterized in that: A bolt hole is arranged at the center of the bushing, and bolts are passed through the bolt holes on the bushing and the bolt holes on the longitudinal arm to install the leaf spring body and the torsion beam body.

6. The automobile leaf spring torsion beam suspension according to claim 1, characterized in that: A through hole is provided at the bottom of the leaf spring bracket, and the leaf spring body passes through the through hole.

7. The automobile leaf spring torsion beam suspension according to claim 6, characterized in that: The width and height of the through hole match the width and height of the leaf spring body respectively.

8. The automobile leaf spring torsion beam suspension according to claim 6, characterized in that: A mounting shaft is arranged on the top of the leaf spring bracket, and the mounting shaft is fixed on the upper surface of the leaf spring bracket through a cushion block.

9. The automobile leaf spring torsion beam suspension according to claim 1, characterized in that: Hub connecting plates are welded on the outer sides of the longitudinal arms at both ends of the torsion beam body.

10. An automobile, characterized in that: It comprises the automobile leaf spring torsion beam suspension as described in any one of claims 1 to 9.

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