CN109484119B

CN109484119B - Coupled torsion beam bridge type suspension system

Info

Publication number: CN109484119B
Application number: CN201811543648.8A
Authority: CN
Inventors: 刘守银
Original assignee: Anhui Jianghuai Automobile Group Corp
Current assignee: Anhui Jianghuai Automobile Group Corp
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2020-12-01
Anticipated expiration: 2038-12-17
Also published as: CN109484119A

Abstract

The invention discloses a coupling torsion beam bridge type suspension system, which comprises a first longitudinal arm, a second longitudinal arm, a cross beam, a plate spring, a first elastic component and a second elastic component, wherein the first longitudinal arm is connected with the second longitudinal arm through a first connecting rod; one end of the cross beam is fixedly connected with the first longitudinal arm, and the other end of the cross beam is fixedly connected with the second longitudinal arm; a first bushing is installed at one end of the first longitudinal arm, and a first supporting seat is installed at the other end of the first longitudinal arm; the first bushing is configured for connection with a vehicle body; the first elastic component is arranged on the first supporting seat; a second bushing is installed at one end of the second longitudinal arm, and a second supporting seat is installed at the other end of the second longitudinal arm; the second bushing is configured for connection with a vehicle body; the second elastic component is arranged on the second supporting seat; the first elastic assembly and the second elastic assembly are positioned on the same side of the cross beam; one end of the plate spring is connected with the first elastic assembly, and the other end of the plate spring is connected with the second elastic assembly. The present disclosure can greatly improve the stability of vehicle steering.

Description

Coupled torsion beam bridge type suspension system

Technical Field

The invention relates to the technical field of automobile suspensions, in particular to a coupling torsion beam bridge type suspension system.

Background

The torsion beam bridge type suspension has three forms of an axle type, a coupled type and a pivot type, and although there are limitations in design performance factors such as riding comfort, driving stability, etc., the coupled torsion beam bridge type suspension system (hereinafter, referred to as CTBA) has been largely used for rear wheel suspension systems of compact and medium-sized vehicles, compared to an independent type suspension system, because the coupled torsion beam bridge type suspension system has advantages of few components, light weight and low manufacturing cost.

Fig. 1 is a perspective view of a CTBA in the prior art, including a coupling torsion beam 1', a coil spring 2', a damper 3', a rubber pad 4', a bushing 5', a left mounting bracket 6' and a right mounting bracket 7 '.

The coupling torsion beam 1' is a welding assembly and comprises a sleeve, a left longitudinal arm, a cross beam, a left spring seat, a left shock absorber support, a left hub shaft support, a right longitudinal arm, a right hub shaft support, a right spring seat and a right shock absorber support; the left mounting bracket and the right mounting bracket are connected and fixed on the vehicle body, and the left wheel and the right wheel are arranged on a left hub shaft support and a right hub shaft support on the coupling torsion beam 1.

The cross beams are various in types, and have stabilizer bars or stabilizer bars; the cross section has V shape, U shape, etc., and also has closed hydroformed I shape, V shape, etc.; the structure of the coupling torsion beam 1' is different with the structure of the cross beam and the like.

The lower end of the spiral spring 2 'is arranged on a spring seat of the coupling torsion beam 1', the upper end of the spiral spring is connected with a vehicle body through a rubber pad 4', but the spiral spring 2' only plays an elastic role in the Z direction of the CTBA, and does not play any limitation or elastic role in the limitation of the X direction and the Y direction of the CTBA.

The lower end of the shock absorber 3 'is connected with a shock absorber support of the root coupling torsion beam 1', the upper end of the shock absorber 3 'is connected with a vehicle body, and an upper limiting block and a lower limiting block are arranged in the shock absorber 3' and limit the upper position and the lower position of a suspension.

In view of the driving stability when the vehicle is steered, the vehicle should maintain a tendency to understeer, and for this purpose, it is desirable that the rear outer toe (toe-in) of the steered vehicle should be induced, and the rear inner toe (toe-out) of the steered vehicle should be induced.

Fig. 2 is a plan view of the movement characteristics of the CTBA to which a lateral force is applied, and the suspension is connected to the vehicle body only through the bushings 5' at the front left and right sides. When the vehicle is turning, due to the flexibility of the rubber inside the bush 5', under the action of the lateral force F1, the entire CTBA rotates about the Z-axis due to the deformation of the bush 5' and generates a toe-out at the rear outer wheel W1, while the rebounded rear inner wheel W2 is applied with the lateral force F1 and thus maintains the previous toe-out or becomes a toe-in, so that the vehicle is oversteered, reducing the turning stability of the vehicle.

How to solve the above problems is one of the important problems that the skilled person needs to solve urgently.

Disclosure of Invention

It is an object of the present invention to provide a coupled torsion beam bridge suspension system that solves the deficiencies of the prior art and that ensures vehicle steering stability.

The invention provides a coupling torsion beam bridge type suspension system, which comprises a first longitudinal arm, a second longitudinal arm, a cross beam, a plate spring, a first elastic component and a second elastic component, wherein the first longitudinal arm is connected with the second longitudinal arm through a first connecting rod;

one end of the cross beam is fixedly connected with the first longitudinal arm, and the other end of the cross beam is fixedly connected with the second longitudinal arm;

a first bushing is installed at one end of the first longitudinal arm, and a first supporting seat is installed at the other end of the first longitudinal arm; the first bushing is configured for connection with a vehicle body; the first elastic component is arranged on the first supporting seat;

a second bushing is installed at one end of the second longitudinal arm, and a second supporting seat is installed at the other end of the second longitudinal arm; the second bushing is configured for connection with a vehicle body; the second elastic component is arranged on the second supporting seat; the first elastic assembly and the second elastic assembly are positioned on the same side of the cross beam;

one end of the plate spring is connected with the first elastic assembly, and the other end of the plate spring is connected with the second elastic assembly.

Optionally, the coupled torsion beam bridge suspension system further comprises a fixing assembly;

the fixing component is mounted on the plate spring; the fixing component is positioned between the first supporting seat and the second supporting seat; the securing assembly is configured for attachment to a vehicle body.

Optionally, the fixing assembly includes a fixing bracket, a lower cushion block, an upper cushion block and a mounting bolt;

the fixing support is provided with a mounting groove, the plate spring penetrates through the mounting groove, the lower cushion block is mounted in the mounting groove, and the lower cushion block is positioned between the bottom of the mounting groove and the plate spring; the upper cushion block is arranged on one side, far away from the lower cushion block, of the plate spring;

the fixing support is provided with a connecting lug, and the mounting bolt penetrates through the connecting lug to be connected with the vehicle body.

Optionally, the fixing assembly further comprises a limiting column;

the bottom of the plate spring is provided with a first limiting hole, and the bottom of the mounting groove is provided with a second limiting hole; the first limiting hole and the second limiting hole are blind holes;

the limiting column penetrates through the lower cushion block, one end of the limiting column is located in the first limiting hole, and the other end of the limiting column is located in the second limiting hole.

Optionally, the number of the fixing assemblies is two, and the two fixing assemblies are uniformly distributed in the length direction of the plate spring.

Optionally, the first elastic assembly includes a first bottom plate, a first elastic column, a first upper plate and a first connecting stud;

the first bottom plate is fixedly arranged on the first supporting seat, and the lower end of the first elastic column is fixedly connected with the first bottom plate;

the first upper plate is fixedly arranged at one end, far away from the first bottom plate, of the first elastic column, one end of the first connecting stud is arranged in the first elastic column, and the first connecting stud penetrates through the first upper plate; the first connecting stud is connected with the plate spring;

the second elastic assembly comprises a second bottom plate, a second elastic column, a second upper plate and a second connecting stud;

the second bottom plate is fixedly arranged on the second supporting seat, and the lower end of the second elastic column is fixedly connected with the second bottom plate;

the second upper plate is fixedly arranged at one end, far away from the second bottom plate, of the second elastic column, one end of the second connecting stud is arranged in the second elastic column, and the second connecting stud penetrates through the second upper plate; the second connecting stud is connected with the plate spring.

Optionally, a first flanging is arranged at the edge of the first bottom plate, and the first flanging is bent towards the direction of the first elastic column;

and a second flanging is arranged at the edge of the second bottom plate and is bent towards the second elastic column.

Optionally, a third flanging is arranged on the periphery of the first upper plate, and the third flanging is bent towards the direction of the first elastic column; the inner wall of the third flanging is fixedly connected with the first elastic column;

a fourth flanging is arranged on the periphery of the second upper plate and is bent towards the second elastic column; the inner wall of the fourth flanging is fixedly connected with the second elastic column.

Optionally, the first elastic assembly further comprises a first inner bone piece, the first inner bone piece is arranged in the first elastic column, and the first connecting stud is fixedly connected with the first inner bone piece;

the second elastic component further comprises a second inner bone piece, the second inner bone piece is arranged in the second elastic column, and the second connecting stud is fixedly connected with the second inner bone piece.

Optionally, the first support seat includes a first support transverse plate, a first support lateral plate and a first support cylinder;

the number of the first supporting side plates is two; two opposite edges of the first supporting transverse plate are fixedly connected with the two first supporting side plates respectively to form a U-shaped structure;

the first supporting side plate is fixedly connected with the first longitudinal arm, and the first supporting transverse plate is fixedly connected with the first elastic assembly; one end of the first supporting cylinder is fixedly connected with the first supporting transverse plate, and the other end of the first supporting cylinder is fixedly connected with the first longitudinal arm;

the second supporting seat comprises a second supporting transverse plate, a second supporting side plate and a second supporting barrel;

the number of the second supporting side plates is two; two opposite edges of the second supporting transverse plate are fixedly connected with the two second supporting side plates respectively to form a U-shaped structure;

the second supporting side plate is fixedly connected with the second longitudinal arm, and the second supporting transverse plate is fixedly connected with the second elastic assembly; one end of the second supporting cylinder is fixedly connected with the second supporting transverse plate, and the other end of the second supporting cylinder is fixedly connected with the second longitudinal arm.

Compared with the prior art, this disclosure is through setting up the leaf spring between first trailing arm and second trailing arm, and the one end of leaf spring is connected with first trailing arm through first elastic component, and the other end of leaf spring passes through second elastic component and is connected with the second trailing arm. Because first elastic component and second elastic component can restrict the removal of CTBA in Y to, the restriction of rotatory restriction by two places flexibility restriction of two former bushings around the Z axle when the vehicle turns, become by first bushing, second bushing, first elastic component and second elastic component flexibility restriction everywhere, when receiving the side direction power effect, the moment of the relative centre of rotation SP of reaction force that first elastic component and second elastic component produced is great, can prevent that back outer wheel department from producing the toe-in, prevent that back inner wheel department from producing the toe-in, make the vehicle turn to steadily, can improve the stability that the vehicle turned to by a wide margin.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a perspective view of a CTBA in the prior art;

fig. 2 is a top view of the movement characteristics of a prior art CTBA with a lateral force applied;

fig. 3 is a perspective view of a CTBA proposed by the present disclosure;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a sectional view taken along the line A-A in FIG. 4;

FIG. 6 is a cross-sectional view of a fixation assembly as set forth in the present disclosure;

FIG. 7 is a cross-sectional view taken along the line C-C of FIG. 5;

fig. 8 is a perspective view of a fixing bracket proposed by the present disclosure;

FIG. 9 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 10 is a cross-sectional view of the first elastomeric component set forth in the present disclosure taken in another direction;

fig. 11 is a perspective view of a first resilient assembly as set forth in the present disclosure;

FIG. 12 is a cross-sectional view taken along line D-D of FIG. 5;

FIG. 13 is a cross-sectional view of a second elastomeric component in another direction contemplated by the present disclosure;

FIG. 14 is a perspective view of a second elastomeric component set forth in the present disclosure;

fig. 15 is a schematic view of a mounting structure of a cross member proposed by the present disclosure.

Description of reference numerals:

1' -coupling torsion beam, 2' -helical spring, 3' -vibration absorber, 4' -rubber pad, 5' -bushing, 6' -left mounting bracket, 7' -right mounting bracket;

w1-rear outer wheel, W2-rear inner wheel, F1-lateral force, SP-relative center of rotation;

1-a first longitudinal arm, 2-a second longitudinal arm, 3-a cross beam, 4-a plate spring, 5-a first elastic component, 6-a second elastic component, and 7-a fixed component;

11-a first bushing, 12-a first support seat;

121-a first supporting transverse plate, 122-a first supporting side plate, 123-a first supporting cylinder;

21-a second bushing, 22-a second support seat;

221-a second supporting transverse plate, 222-a second supporting side plate, 223-a second supporting cylinder;

41-a first limiting hole, and a second limiting hole,

51-a first bottom plate, 52-a first elastic column, 53-a first upper plate, 54-a first connecting stud, 55-a first inner bone piece;

511-a first flange;

531-third flanging;

61-a second bottom plate, 62-a second elastic column, 63-a second upper plate, 64-a second connecting stud and 65-a second inner bone piece;

611-second flanging;

631-a fourth flange;

71-a fixed support, 72-a lower cushion block, 73-an upper cushion block, 74-a mounting bolt, 75-a mounting groove and 76-a limiting column;

711-connecting lugs;

751-a second limiting hole.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Referring to fig. 3 to 15, the present disclosure provides a coupled torsion beam bridge suspension system, which includes a first trailing arm 1, a second trailing arm 2, a cross beam 3, a leaf spring 4, a first elastic component 5, and a second elastic component 6. Specifically, one end of the cross beam 3 is fixedly connected with the first trailing arm 1, and specifically, the cross beam 3 is welded with the first trailing arm 1. Specifically, the cross beam 3 is welded to the middle of the first trailing arm 1. The other end of the cross beam 3 is fixedly connected with the second trailing arm 2. Specifically, the cross beam 3 and the second trailing arm 2 are welded, and the cross beam 3 is connected with the middle of the second trailing arm 2.

Referring to fig. 3 to 5, a first bushing 11 is installed at one end of the first trailing arm 1, and specifically, a first bushing hole is formed in the first trailing arm 1, and the first bushing 11 is installed in the first bushing hole. The first trailing arm 1 is connected to the vehicle body via the first bush 11. A first supporting seat 12 is installed at the other end of the first trailing arm 1, and specifically, the first supporting seat 12 is located at one side of the first trailing arm 1 close to the second trailing arm 1. The first support 12 and the first trailing arm 1 may be connected by bolts or by welding. The first bushing 11 is configured to be connected to a vehicle body, and in particular, since the connection manner of the first bushing 11 to the vehicle body is the same as that of the bushing to the vehicle body in the prior art, the detailed description thereof is omitted. The first elastic element 5 is mounted on the first support 12. In particular, the first elastic element 5 is bolted to the first support 12.

Referring to fig. 3 to 5, a second bushing 21 is installed at one end of the second trailing arm 2, specifically, a second bushing hole is formed at one end of the second trailing arm 2, the second bushing 21 is installed in the second bushing hole, and the second trailing arm 2 is connected to the vehicle body through the second bushing 21. Further, a second support seat 22 is installed at the other end of the second trailing arm 2, and specifically, the second trailing arm 2 and the second support seat 22 may be connected by a bolt or welded. The second bushing 21 is provided for connection with a vehicle body. Specifically, the second bushing 21 may be connected to the vehicle body through other components, and since the connection manner of the second bushing 21 to the vehicle body is the same as the connection manner of the bushing to the vehicle body in the prior art, no further description is provided herein. The second elastic component 6 is mounted on the second support seat 22, and specifically, the second elastic component 6 is connected with the second support seat 22 by bolts. The first elastic component 5 and the second elastic component 6 are located on the same side of the cross beam 3. One end of the plate spring 4 is connected with the first elastic assembly 5, specifically, the plate spring 4 is bolted with the first elastic assembly 5, and the other end of the plate spring 4 is connected with the second elastic assembly 6, specifically, the plate spring 4 is bolted with the second elastic assembly 6.

Due to the adoption of the plate spring 4, the plate spring 4 spans the first supporting seat 12 and the second supporting seat 22, the plate spring 4 is fixed on the vehicle body, one end of the plate spring 4 is connected with the first supporting seat 12 through the first elastic component 5, and the other end of the plate spring 4 is connected with the second supporting seat 12 through the second spring component 6. Because the first elastic component 5 and the second elastic component 6 can limit the movement of the CTBA in the Y direction, when the vehicle turns, the limitation of the rotation around the Z axis is limited by two flexible limits of the original two bushings, namely the first bushing 11, the second bushing 21, the first elastic component 5 and the second elastic component 6, and the limitation is changed into four flexible limits by the first bushing 11, the second bushing 21, the first elastic component 5 and the second elastic component 6, when the vehicle is subjected to lateral force, the moment of the reaction force generated by the first elastic component 5 and the second elastic component 6 is larger relative to the rotation center SP, the rear outer wheel can be prevented from generating rear toe-in, the rear inner wheel is prevented from generating toe-in, the vehicle is enabled to turn stably, and the stability of the vehicle turning can be greatly.

Optionally, referring to fig. 6 to 8, the coupled torsion beam bridge suspension system further includes a fixing assembly 7. The fastening assembly 7 serves to connect the leaf spring 4 to a vehicle body.

The fixing assembly 7 is mounted on the leaf spring 4. Specifically, the fixing assembly 7 is connected with the plate spring 4 through a straight rod bolt, and may be connected with a vehicle body through a U-shaped bolt. The fixing component 7 is located between the first support seat 12 and the second support seat 22, and the fixing component 7 is configured to be connected with a vehicle body. In a specific implementation, the plate spring 4 may be a single steel plate, and the plate spring 4 has an arc shape, and a portion between two ends of the plate spring 4 is protruded upward in a natural state. A fixing member 7 is installed at the middle of the plate spring 4. In this way, the plate spring 4 is easily attached to the vehicle body.

Further, referring to fig. 6 to 8, the fixing assembly 7 includes a fixing bracket 71, a lower pad 72, an upper pad 73, and a mounting bolt 74. Specifically, the fixing bracket 71 is provided with a mounting groove 75, the mounting groove 75 is a through groove, the plate spring 4 passes through the mounting groove 75, the lower cushion block 72 is mounted in the mounting groove 75, and the lower cushion block 72 is located between the bottom of the mounting groove 75 and the plate spring 4. The upper block 73 is mounted on the side of the leaf spring 4 remote from the lower block 72. In this way, rigid collision or friction between the fixing bracket 71 and the leaf spring 4 or between the leaf spring 4 and the vehicle body can be prevented. The fixing bracket 71 is provided with a connecting lug 711, and the mounting bolt 74 penetrates through the connecting lug 711 to be connected with the vehicle body. In this manner, the attachment of the fixing bracket 71 to the vehicle body is facilitated. Specifically, the number of the connecting lugs 711 is two, and the two connecting lugs 711 are symmetrically arranged.

Further, referring to fig. 6, the fixing assembly 7 further includes a limiting post 76. The limiting column 76 is used for limiting the fixed component 7 to move on the plate spring 4. The accuracy of the mounting point is guaranteed, and the stability of the connection point between the plate spring 4 and the vehicle body can be guaranteed. Specifically, the bottom of the plate spring 4 is provided with a first limiting hole 41, and the bottom of the mounting groove 75 is provided with a second limiting hole 751. The first limiting hole 41 and the second limiting hole 751 are both blind holes. The limiting column 76 penetrates through the lower cushion block 72, one end of the limiting column 76 is located in the first limiting hole 41, and the other end of the limiting column 76 is located in the second limiting hole 751. In specific implementation, the lower cushion block 72 is provided with a through hole, and the limiting column 76 penetrates through the through hole.

Further, referring to fig. 5, the number of the fixing assemblies 7 is two, and the two fixing assemblies 7 are uniformly distributed in the length direction of the plate spring 4. Namely, the fixing assemblies 7 are located at 1/3 and 2/3 lengths of the leaf spring 4, respectively. In this way, the stability of the plate spring 4 with respect to the vehicle body support can be ensured. Of course, it is also possible to arrange the two fixing assemblies 7 on the leaf spring 4 in a symmetrical manner.

Alternatively, referring to fig. 9 to 11, the first elastic assembly 5 includes a first bottom plate 51, a first elastic column 52, a first upper plate 53 and a first connecting stud 54. Specifically, the first bottom plate 51 is fixedly installed on the first support seat 12, and the first bottom plate 51 is connected to the first support seat 12 by bolts. The lower end of the first elastic column 52 is fixedly connected with the first base plate 51, and an integrated structure is formed between the first elastic column 52 and the first base plate 51 through vulcanization. The first upper plate 53 is fixedly installed at one end of the first elastic column 52 far away from the first base plate 51, and specifically, an integrated structure is formed between the first upper plate 53 and the first elastic column 52 through vulcanization, that is, the first elastic column 52, the first base plate 51 and the first upper plate 53 are an integrated structure. One end of the first connection stud 54 is mounted within the first elastomeric post 52, and in particular, one end of the first connection stud 54 is vulcanized within the first elastomeric post 52. The first connecting stud 54 penetrates the first upper plate 53, the first connecting stud 54 is connected to the plate spring 4, and the first connecting stud 54 penetrates the plate spring 4 and is connected to a nut.

Referring to fig. 12 to 14, the second elastic assembly 6 includes a second bottom plate 61, a second elastic column 62, a second upper plate 63 and a second connecting stud 64. Specifically, the second bottom plate 61 is fixedly mounted on the second support seat 22, the second bottom plate 61 is connected with the second support seat 22 by bolts, and the lower end of the second elastic column 62 is fixedly connected with the second bottom plate 61. The second elastic column 62 and the second base plate 61 form an integral structure through a vulcanization process. The second upper plate 63 is fixedly installed at one end of the second elastic column 62 far away from the second base plate 61, and an integral structure is formed between the second upper plate 63 and the second elastic column 62 through vulcanization. One end of the second connector stud 64 is mounted within the second elastomeric post 62, and in particular, one end of the second connector stud 64 is vulcanized within the second elastomeric post 62. The second connecting stud 64 passes through the second upper plate 63. The second connecting stud 64 is connected to the plate spring 4, and specifically, the second connecting stud 64 passes through the plate spring 4 and is connected to a nut. In specific implementation, the first elastic column 52 and the second elastic column 62 are both cylindrical rubber or cylindrical rubber. Of course, in other embodiments, the first connecting stud 54 may be replaced by a stud penetrating through the first bottom plate 51, the first elastic column 52, and the first upper plate 53, and the second connecting bolt 64 may be replaced by a stud penetrating through the second bottom plate 61, the second elastic column 62, and the second upper plate 63.

Further, referring to fig. 9 to 14, a first flange 511 is disposed at an edge of the first bottom plate 51, and the first flange 511 is bent toward the first elastic column 52. In this way, the strength of the first base plate 51 can be improved, and vulcanization between the first base plate 51 and the first elastic columns 52 can be facilitated.

The edge of the second bottom plate 61 is provided with a second flange 611, and the second flange 611 bends toward the second elastic column 62. In this way, the strength of the second base plate 61 can be improved, and vulcanization between the second base plate 61 and the second elastic columns 62 is facilitated.

Further, a third flange 531 is disposed on the outer periphery of the first upper plate 53, and the third flange 531 bends toward the first elastic column 52. The inner wall of the third flange 531 is fixedly connected to the first elastic column 52, and specifically, the third flange 531 and the first elastic column 52 are vulcanized to form an integral structure. In this way, the strength of the first upper plate 53 can be improved, and the vulcanization between the first upper plate 53 and the first elastic column 52 can be facilitated. Meanwhile, the connection surface between the first upper plate 53 and the first elastic column 52 can be enlarged, which is beneficial to improving the stability in use.

A fourth flange 631 is disposed on the outer periphery of the second upper plate 63, and the fourth flange 631 bends toward the second elastic column 62. The inner wall of the fourth flange 631 is fixedly connected with the second elastic column 62. Specifically, the fourth flange 631 and the second elastic column 62 are vulcanized to form an integral structure. In this way, the strength of the second upper plate 63 can be improved, and the vulcanization between the second upper plate 63 and the second elastic column 62 can be facilitated. Meanwhile, the connection surface between the second upper plate 63 and the second elastic column 62 can be enlarged, which is beneficial to improving the stability in use.

Optionally, referring to fig. 9 to 11, the first elastic component 5 further includes a first inner bone piece 55, the first inner bone piece 55 is disposed in the first elastic column 52, specifically, the first inner bone piece 55 is vulcanized in the first elastic column 52, and the first connection stud 54 is fixedly connected to the first inner bone piece 55, specifically, the first connection stud 54 is welded to the first inner bone piece 55. By providing the first inner bone piece 55, the strength of the first elastic column 52 can be ensured, and the connection firmness between the first connection stud 54 and the first elastic column 52 can also be ensured.

Referring to fig. 12 to 14, the second elastic component 6 further includes a second inner bone piece 65, the second inner bone piece 65 is disposed in the second elastic column 62, specifically, the second inner bone piece 65 is vulcanized in the second elastic column 62, and the second connection stud 64 is fixedly connected to the second inner bone piece 65, specifically, the second connection stud 64 is welded to the second inner bone piece 65. In this way, by providing the second inner bone piece 65, the strength of the second elastic column 62 can be ensured, and the connection firmness between the second connection stud 64 and the second elastic column 62 can also be ensured.

Optionally, referring to fig. 9 to 11, the first supporting seat 12 includes a first supporting transverse plate 121, a first supporting side plate 122 and a first supporting cylinder 123. The number of the first supporting side plates 122 is two; two opposite edges of the first horizontal supporting plate 121 are respectively and fixedly connected with the two first lateral supporting plates 122 to form a U-shaped structure. The first supporting side plate 122 is fixedly connected to the first trailing arm 1, specifically, the first supporting side plate 122 is welded to the first trailing arm 1, and the first supporting transverse plate 121 is fixedly connected to the first elastic assembly 5. Specifically, the first support cross plate 121 is bolted to the first base plate 51. One end of the first supporting cylinder 123 is fixedly connected to the first supporting transverse plate 121, specifically, the first supporting cylinder 123 is welded to the first supporting transverse plate 121, the other end of the first supporting cylinder 123 is fixedly connected to the first trailing arm 1, and the first supporting cylinder 123 is welded to the first trailing arm 1.

Referring to fig. 12 to 14, the second support seat 22 includes a second support transverse plate 221, a second support side plate 222 and a second support cylinder 223. Specifically, the number of the second support side plates 222 is two; two opposite edges of the second horizontal supporting plate 221 are fixedly connected to the two second lateral supporting plates 222, respectively, to form a U-shaped structure. The second supporting side plate 222 is fixedly connected with the second trailing arm 2, specifically, the second supporting side plate 222 is welded with the second trailing arm 2, and the second supporting transverse plate 221 is fixedly connected with the second elastic assembly 6; specifically, the second support cross plate 221 is bolted to the second base plate 61. One end of the second support cylinder 223 is fixedly connected to the second support transverse plate 221, specifically, the second support cylinder 223 is welded to the second support transverse plate 221, the other end of the second support cylinder 223 is fixedly connected to the second trailing arm 2, and the second support cylinder 223 is fixedly connected to the second trailing arm 2. In this way, by providing the first support cylinder 123 and the second support cylinder 223, the strength of the first support base 12 and the second support base 22 can be improved. In order to further improve the strength of the first support seat 12 and the second support seat 22, an end of the first support cylinder 123 away from the first support transverse plate 121 has an arc-shaped opening matched with the first longitudinal arm 1, and an end of the second support cylinder 223 away from the second support transverse plate 121 has an arc-shaped opening matched with the second longitudinal arm 2.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A coupled torsion beam bridge type suspension system is characterized by comprising a first longitudinal arm, a second longitudinal arm, a cross beam, a plate spring, a first elastic assembly and a second elastic assembly;

one end of the plate spring is connected with the first elastic assembly, and the other end of the plate spring is connected with the second elastic assembly;

the first elastic assembly comprises a first bottom plate, a first elastic column, a first upper plate and a first connecting stud;

the second upper plate is fixedly arranged at one end, far away from the second bottom plate, of the second elastic column, one end of the second connecting stud is arranged in the second elastic column, and the second connecting stud penetrates through the second upper plate; the second connecting stud is connected with the plate spring;

the coupled torsion beam bridge suspension system further comprises a fixing assembly;

the fixing component is arranged on the plate spring and is positioned between the first supporting seat and the second supporting seat; the fixing assembly is arranged for connecting a vehicle body;

the fixing assembly comprises a fixing bracket, a lower cushion block, an upper cushion block and a mounting bolt;

2. The coupled torsion beam bridge suspension system of claim 1, wherein the securing assembly further comprises a restraining post;

3. The coupled torsion beam bridge suspension system according to any one of claims 1 to 2, wherein the number of the fixing members is two, and the two fixing members are uniformly distributed in a length direction of the plate spring;

a first flanging is arranged at the edge of the first bottom plate and is bent towards the first elastic column;

4. The coupled torsion beam bridge suspension system according to claim 1, wherein a third flange is provided on an outer periphery of the first upper plate, and the third flange is bent toward the first elastic column; the inner wall of the third flanging is fixedly connected with the first elastic column;

5. The coupled torsion beam bridge suspension system of claim 1, 2 or 4, wherein the first resilient assembly further comprises a first endosseum disposed within the first resilient post, the first connection stud fixedly connected to the first endosseum;

6. The coupled torsion beam bridge suspension system of claim 1, wherein the first support base comprises a first support cross plate, a first support side plate, and a first support cylinder;