Automobile torsion beam rear suspension and automobile

Abstract

The automobile torsion beam rear suspension comprises a torsion beam body, the end of the torsion beam body is connected with a longitudinal arm, one end of the longitudinal arm is connected with a shock absorber and the longitudinal arm, and a hub bearing mounting plate and a spring tray which are fixed to the longitudinal arm are arranged between the connecting end of the shock absorber and the connecting position of the longitudinal arm and the torsion beam body. A brake is fixed to the hub bearing mounting plate, a spring tray is connected with the bottom end of a spring, a lining assembly is arranged at the other end of the longitudinal arm and connected with the mounting base through a fastener and a plurality of connecting holes formed in the mounting base, and the hub bearing mounting plate is fixedly connected with the lining assembly. The lining assembly at the end of the trailing arm can be connected with the mounting base through different connecting holes so as to adjust the included angle between the connecting line of the center of the lining assembly and the center of the automobile wheel and the vertical line, the automobile torsion beam rear suspension is high in applicability, and the driving comfort is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, specifically to a torsion beam rear suspension for automobiles and an automobile. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] A torsion beam rear suspension is a non-independent suspension system, comprising a torsion beam with trailing arms at both ends, and also including elastic elements and shock absorbers. Patent CN208664875U discloses an automotive torsion beam and its mounting structure, including a torsion beam body and two torsion beam trailing arms; the two trailing arms are respectively located at both ends of the torsion beam body. The cross-section of the torsion beam body perpendicular to its extension direction is a closed cross-section, and a closed cavity is formed within the cross-section along its contour. The area of ​​the cavity gradually increases from the middle of the torsion beam body towards its two ends. This torsion beam can reduce weight, and while reducing weight, the closed-section torsion beam not only ensures relatively good performance of the rear suspension, but also significantly improves its stiffness and strength. However, the mounting center of the rear suspension bushing assembly using the torsion beam and the position of the wheel center are fixed and cannot be adjusted. When the overall vehicle performance deviates and adjustments are needed, it cannot be achieved. At the same time, the torsion beam rear suspension cannot be adapted to different vehicle bodies on the same platform. In addition, although the torsion beam can significantly improve stiffness and strength, it uses a straight beam throughout, and its roll center height is low, resulting in poor cornering stability, which affects the overall vehicle comfort. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a torsion beam rear suspension for automobiles and an automobile, which overcomes the defects of the current torsion beam rear suspension.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, embodiments of the present invention provide a torsion beam rear suspension for automobiles, including a torsion beam body, an end of the torsion beam body connected to a trailing arm, a shock absorber connected to one end of the trailing arm, a hub bearing mounting plate and a spring tray fixed to the trailing arm between the connection end of the trailing arm and the shock absorber and the connection position of the trailing arm and the torsion beam body, the hub bearing mounting plate being fixed to a brake, the spring tray being connected to the bottom end of a spring, and a bushing assembly being provided at the other end of the trailing arm, the bushing assembly being connected to the mounting seat via fasteners and connecting holes provided on the mounting seat, wherein multiple connecting holes are provided on the mounting seat, and the bushing assembly at the end of the trailing arm can be connected to the mounting seat through different connecting holes to achieve adjustment of the angle between the line connecting the center of the bushing assembly, the center of the automobile wheel and the vertical line.

[0006] Optionally, the torsion beam body adopts an upwardly convex arched structure, and the cross section of the torsion beam body perpendicular to its extension direction is a U-shaped structure, with the opening of the U-shaped structure facing the front of the vehicle.

[0007] Optionally, the torsion beam body includes a horizontal portion, with inclined portions at both ends of the horizontal portion. The inclined portions slope downwards along the direction from the center of the torsion beam body to the ends, and an arc-shaped transition portion is provided between the horizontal portion and the inclined portions.

[0008] Optionally, the end of the longitudinal arm is provided with a shock absorber mounting seat, which overlaps with and is welded to the end of the longitudinal arm, and the shock absorber mounting seat is connected to one end of the shock absorber.

[0009] Optionally, a spring tray is provided between the bottom end of the inner side of the longitudinal arm and the bottom end of the torsion beam body. The spring tray overlaps and is welded to the bottom end of the inner side of the longitudinal arm and the bottom end of the torsion beam body.

[0010] Optionally, a spring pad is provided between the bottom of the spring and the spring tray.

[0011] Optionally, the wheel hub bearing mounting plate is disposed on the outer side of the longitudinal arm, and overlapping plates are fixed on both sides of the wheel hub bearing mounting plate. The overlapping plates are connected to the longitudinal arm by overlapping and welding.

[0012] Optionally, the bushing assembly is fixed inside the bushing support at the end of the longitudinal arm.

[0013] Optionally, the longitudinal arms at both ends of the torsion beam body, as well as the mounting seats, wheel hub bearing mounting plates, and spring trays connected to the longitudinal arms, are arranged symmetrically with respect to the center of the torsion beam body.

[0014] Secondly, embodiments of the present invention provide a car equipped with the torsion beam rear suspension described in the first aspect.

[0015] The beneficial effects of this invention are as follows: 1. The torsion beam rear suspension of the present invention has multiple connecting holes on the mounting base. The bushing assembly at the end of the trailing arm can be connected to the mounting base through different connecting holes to adjust the angle between the center of the bushing assembly, the line connecting the wheel center and the vertical line. When the performance of the vehicle deviates, the connecting holes between the mounting base and the bushing assembly can be adjusted to adjust the performance of the vehicle. At the same time, it can also meet the needs of different bodyes on the same platform, thus improving the applicability of the torsion beam rear suspension.

[0016] 2. The torsion beam rear suspension of the present invention, wherein the torsion beam body adopts an upwardly convex arch structure and the cross-section of the torsion beam body adopts a U-shaped structure. While minimizing the weight of the torsion beam body, the arch structure design can increase the height of the torsion beam body's roll center, thereby reducing the body roll amplitude, improving cornering stability, and enhancing the overall vehicle comfort. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the overall structure of the torsion beam in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the mounting base structure in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the angle D formed by the line connecting the center of the bushing assembly and the center of the automobile wheel in Embodiment 1 of the present invention and the vertical line; Figure 5 This is a schematic diagram of the torsion beam body structure of Embodiment 1 of the present invention; Figure 6 This is a partial schematic diagram of the arched part of the torsion beam body in Embodiment 1 of the present invention; Among them, 1. Torsion beam body, 2. Longitudinal arm, 3. Shock absorber mounting base, 4. Shock absorber, 5. Wheel hub bearing mounting plate, 6. Spring tray, 7. Bushing support, 8. Bushing assembly, 9. Fastener, 10. Mounting base, 11. Spring, 12. Brake; 10-1. Connecting hole. Detailed Implementation

[0019] Example 1 This embodiment provides a torsion beam rear suspension for automobiles, such as Figure 1 As shown, it includes a torsion beam, spring 11, mounting base 10, brake 12, shock absorber 4, etc. Figure 2 As shown, the torsion beam includes a torsion beam body 1, a longitudinal arm 2, a spring tray 6, a shock absorber mounting base 3, a wheel hub bearing mounting plate 5, a bushing support 7, and a bushing assembly 8.

[0020] In this embodiment, both ends of the torsion beam body 1 are provided with a longitudinal arm 2, a spring tray 6, a shock absorber mounting seat 3, a wheel hub bearing mounting plate 5, a bushing support 7, a bushing assembly 8, a spring 11, a mounting seat 10, a brake 12, and a shock absorber 4. The various components at both ends of the torsion beam body 1 are arranged symmetrically with respect to the center of the torsion beam body 1.

[0021] Both ends of the torsion beam body 1 are provided with longitudinal arms 2. The ends of the torsion beam body 1 are fixedly connected to the non-end positions of the longitudinal arms 2. The longitudinal arms 2 at both ends of the torsion beam body 1 are symmetrically arranged with respect to the center of the torsion beam body 1.

[0022] One end of the longitudinal arm 2 is provided with a shock absorber mounting seat 3. The shock absorber mounting seat 3 is connected to the shock absorber 4 by bolts. The part of the longitudinal arm 2 between the end of the longitudinal arm 2 and the connection position between the longitudinal arm 2 and the torsion beam body 1 is fixed with a hub bearing mounting plate 5 and a spring tray 6. The hub bearing mounting plates 5 on both sides are symmetrically arranged with respect to the center of the torsion beam body 1, and the spring trays 6 on both sides are symmetrically arranged with respect to the center of the torsion beam body 1.

[0023] The other end of the longitudinal arm 2 is provided with a bushing support 7. A bushing assembly 8 is fixed inside the bushing support 7. The bushing assembly 8 is pressed into the bushing support 7 by tooling. The bushing assembly 8 is detachably connected to the mounting base 10 through fasteners 9 and connecting holes 10-1 provided on the mounting base 10. The edge of the mounting base 10 is provided with multiple mounting holes for fixing to the vehicle body by bolts.

[0024] The bushing assembly 8 can be made using existing technology, such as the bushing assembly disclosed in patent CN208664875U, which includes a sleeve, a rubber sleeve, and a steel sleeve, etc. Its specific structure will not be described in further detail here.

[0025] The bushing assembly 8 is hinged to the mounting base 10 via fasteners 9 and connecting holes 10-1 on the mounting base 10, thereby realizing the hinged connection between the mounting base and the end of the longitudinal arm 2 of the 10.

[0026] In this embodiment, the fastener 9 is a bolt and a nut. The bushing assembly 8 is connected to the mounting base 10 through the fastener 9 and the connecting hole 10-1 on the mounting base 10 using existing technology, which will not be described in detail here.

[0027] The shock absorber mounting base 3 is lapped and welded to the end of the longitudinal arm 2. The shock absorber mounting base 3 is connected to one end of the shock absorber 4 by bolt hinge. The connection method can use existing technology and will not be described in detail here.

[0028] The shock absorber 4 can be made using existing equipment, and its specific structure will not be described in detail here.

[0029] The spring tray 6 is disposed between the ends of the longitudinal arm 2 and the torsion beam body 1. Specifically, the spring tray 6 is overlapped with the bottom end of the longitudinal arm 2 and the bottom end of the torsion beam body 1, and the spring tray 6 is welded and fixed to the bottom end of the longitudinal arm 2 and the bottom end of the torsion beam body 1.

[0030] The spring tray 6 is connected to the bottom end of the spring 11. In this embodiment, a spring pad is provided between the spring tray 6 and the bottom end of the spring 11. The spring pad is fixedly connected to the spring tray 6, and the bottom end of the spring 11 is fixedly connected to the spring pad. The spring pad can use existing components, and its specific structure will not be described in detail here.

[0031] The hub bearing mounting plate 5 is located on the outside of the longitudinal arm 2. Both sides of the hub bearing mounting plate 5 are fixedly connected to the lap plate. The lap plate is lapped and connected to the longitudinal arm 2 and welded to the longitudinal arm 2, thereby realizing the fixed connection between the hub bearing mounting plate 5 and the longitudinal arm 2.

[0032] The wheel hub bearing mounting plate 5 is detachably fixed with the brake 12 by four bolts. The brake 12 can be made using existing equipment, and its specific structure will not be described in detail here.

[0033] The above-described structures in this embodiment can all be achieved using existing technologies. This embodiment improves upon the current torsion beam rear suspension. In a traditional torsion beam rear suspension, the mounting base 10 only has one connecting hole 10-1. Therefore, the bushing assembly 8 at the end of the trailing arm 2 can only be connected to the set position of the mounting base 10. Consequently, the angle D between the line connecting the center of the bushing assembly 8 and the center of the vehicle wheel and the vertical line cannot be adjusted. When vehicle performance deviates, performance cannot be adjusted, and the torsion beam rear suspension cannot meet the needs of different vehicle bodies on the same platform. In this embodiment, as... Figure 3 As shown, multiple connection holes 10-1 are provided on the mounting base 10. The number of connection holes 10-1 is two, three or more, which can be set by those skilled in the art according to actual needs.

[0034] Since the center position of a car wheel is fixed, therefore, as Figure 4 As shown, when the bushing assembly 8 mates with different connecting holes 10-1, the angle D between the line connecting the center of the bushing assembly 8 and the center of the vehicle wheel and the vertical line can be adjusted. For a torsion beam rear suspension, different angles D will result in different handling characteristics of the vehicle, such as understeer or oversteer. Therefore, obtaining a suitable angle D is particularly important for the overall vehicle performance. Thus, when the overall vehicle performance deviates, the performance can be adjusted by adjusting the connecting holes 10-1 between the bushing assembly 8 and the mounting base 10. By adjusting the angle D, better overall vehicle performance can be achieved. Furthermore, for models on the same platform, different body shapes may occur due to structural layout limitations. This embodiment can adapt to different body shapes through multiple connecting holes 10-1 on the mounting base 10, achieving universality. Therefore, the torsion beam rear suspension of this embodiment meets the needs of different body shapes on the same platform, improving the overall applicability of the torsion beam rear suspension.

[0035] In a traditional torsion beam rear suspension, the torsion beam body is a completely straight structure. In this embodiment, as shown... Figures 5-6 As shown, the torsion beam body 1 is designed as an upward-convex arched structure. Compared with the traditional straight crossbeam, the torsion beam body with an upward-arched shape has a higher roll center height. A suitable high roll center height can reduce the body roll amplitude, improve cornering stability, and improve the overall vehicle comfort.

[0036] Furthermore, the torsion beam body 1 has a U-shaped cross-section perpendicular to its extension direction, with the opening of the U-shaped structure facing the front of the car. The torsion beam body 1 includes a horizontal part located at the center, with inclined parts at both ends of the horizontal part. The inclined parts slope downwards along the direction from the center of the torsion beam body to the ends, and an arc-shaped transition part is provided between the horizontal part and the inclined parts. The entire torsion beam body 1 can be manufactured using existing bending and pressing processes, without welding, which improves the rigidity of the torsion beam body 1 and eliminates the need for cylindrical or annular torsion bars in conventional U-shaped cross-sections, thus reducing the weight of the torsion beam body.

[0037] In this embodiment, the torsion beam rear suspension only improves the mounting base 10 and the torsion beam body 1. Multiple connecting holes 10-1 are machined on the mounting base 10, and the torsion beam body 1 is designed as an upper arch structure with a U-shaped cross section. The improvement is convenient, quick, and low in cost. The remaining structure of the torsion beam rear suspension can be achieved using existing technology, and will not be described in detail here.

[0038] The torsion beam rear suspension in this embodiment can adjust the overall vehicle performance and meet the needs of different body types on the same platform, thus improving the applicability of the torsion beam rear suspension. On the other hand, increasing the height of the roll center of the torsion beam body can reduce the body roll amplitude, improve cornering stability, and enhance the overall vehicle comfort.

[0039] Example 2 This embodiment provides a car equipped with the torsional rear suspension described in Embodiment 1. The remaining structure of the car can be constructed using existing technology and will not be described in detail here.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A torsion beam rear suspension for automobiles, characterized in that, The device includes a torsion beam body, with one end connected to a trailing arm. One end of the trailing arm is connected to a shock absorber. Between the connection point of the trailing arm and the shock absorber and the connection point of the trailing arm and the torsion beam body, there is a wheel hub bearing mounting plate and a spring tray fixed to the trailing arm. The wheel hub bearing mounting plate is fixed to a brake. The spring tray is connected to the bottom end of a spring. The other end of the trailing arm is provided with a bushing assembly. The bushing assembly is connected to the mounting base through fasteners and connecting holes on the mounting base. Multiple connecting holes are provided on the mounting base. The bushing assembly at the end of the trailing arm can be connected to the mounting base through different connecting holes to adjust the angle between the center of the bushing assembly, the center of the vehicle wheel, and the vertical line.

2. The automotive torsion beam rear suspension as described in claim 1, characterized in that, The torsion beam body adopts an upward-convex arched structure, and the cross section of the torsion beam body perpendicular to its extension direction is a U-shaped structure, with the opening of the U-shaped structure facing the front of the car.

3. The automotive torsion beam rear suspension as described in claim 2, characterized in that, The torsion beam body includes a horizontal part, with inclined parts at both ends of the horizontal part. The inclined parts slope downwards along the direction from the center of the torsion beam body to the ends, and there is an arc-shaped transition part between the horizontal part and the inclined parts.

4. The automobile torsion beam rear suspension as described in claim 1, characterized in that, The end of the longitudinal arm is provided with a shock absorber mounting seat, which overlaps with and is welded to the end of the longitudinal arm, and the shock absorber mounting seat is connected to one end of the shock absorber.

5. A torsion beam rear suspension for automobiles as described in claim 1, characterized in that, A spring tray is provided between the bottom end of the inner side of the longitudinal arm and the bottom end of the torsion beam body. The spring tray overlaps and is welded to the bottom end of the inner side of the longitudinal arm and the bottom end of the torsion beam body.

6. The automobile torsion beam rear suspension as described in claim 1, characterized in that, A spring pad is provided between the bottom of the spring and the spring tray.

7. A torsion beam rear suspension for automobiles as described in claim 1, characterized in that, The hub bearing mounting plate is located on the outside of the longitudinal arm, and overlapping plates are fixed on both sides of the hub bearing mounting plate. The overlapping plates are connected to the longitudinal arm and welded in place.

8. A torsion beam rear suspension for automobiles as described in claim 1, characterized in that, The bushing assembly is fixed inside the bushing support at the end of the longitudinal arm.

9. A torsion beam rear suspension for automobiles as described in claim 1, characterized in that, The longitudinal arms at both ends of the torsion beam body, as well as the mounting seats, wheel hub bearing mounting plates, and spring trays connected to the longitudinal arms, are arranged symmetrically with respect to the center of the torsion beam body.

10. A car, characterized in that, The vehicle is equipped with a torsion beam rear suspension as described in any one of claims 1-9.

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