CN202703177U - Novel torsion beam suspension - Google Patents

Abstract

The utility model discloses a novel torsion beam suspension, which comprises a transverse part of the transverse beam, and a U-shaped longitudinal part of the transverse beam formed by bending and extending at both ends thereof in the same direction. A trailing arm, the end of the trailing arm is provided with a bush installation hole. The torsion beam rear suspension structure has strong versatility when design changes occur, such as changes in the suspension posture or optimization of the dynamic performance of the torsion beam, etc., only the cross-sectional shape design of the connecting part of the longitudinal beam and the cross beam needs to be changed, and no longer It is necessary to change the design of parts such as springs and shock absorbers. At the same time, the suspension structure is safe and stable, with high reliability and high fatigue resistance.

Description

A New Type of Torsion Beam Suspension

technical field

The utility model relates to an auto part, in particular to a torsion beam suspension structure of a vehicle.

Background technique

Conventionally, as a suspension device of a vehicle, a torsion beam type suspension is composed of trailing arms placed vertically on both sides and a cross member connecting the left and right trailing arms. The anti-fatigue performance of this torsion beam suspension is often difficult to guarantee, and later design changes require a lot of manpower and material resources, and design changes usually require replacement of springs and shock absorbers installed on the trailing arms. At the same time, there is a high stress at the joint between the two ends of the beam and the longitudinal arm, and the fatigue strength problem has been difficult to solve completely.

Utility model content

The technical problem to be solved by the utility model is to realize a new type of torsion beam rear suspension with simple structure, safety and reliability, long service life, good vehicle dynamic performance, and convenient vehicle platform development and design.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a new type of torsion beam suspension, including the transverse part of the beam, and its two ends are bent and extended in the same direction to form the longitudinal part of the U-shaped beam, and the ends of the transverse part of the beam are A longitudinal arm is fixed along the opposite direction of the longitudinal part of the beam, and the end of the longitudinal arm is provided with a bush installation hole.

A base plate is welded between the transverse part of the beam and the longitudinal part of the beam, and the base plate is arranged with a spring base and a fixing pin of a shock absorber.

The cross part of the beam is a C-shaped tube, and when the torsion beam suspension is fixed on the vehicle body, the opening direction of the C-shaped tube faces the rear lower part of the vehicle.

The outer position of the end of the longitudinal part of the beam is provided with a fixing hole for the hub shaft bracket.

The flare angle of the two longitudinal arms fixed on the ends of the transverse part of the beam is 8-15 degrees.

The longitudinal arm is connected to the beam by welding.

The utility model has the advantage that the torsion beam type rear suspension structure has strong versatility when design changes occur, for example, the attitude of the suspension changes or the dynamic performance of the torsion beam needs to be optimized. The shape design is sufficient, and there is no need to change the design of parts such as springs and shock absorbers. At the same time, the suspension structure is safe and stable, with high reliability and high fatigue resistance.

Description of drawings

The following is a brief description of the content expressed in each piece of drawings in the specification sheet of the utility model and the marks in the figure:

Fig. 1 is the top view of traditional torsion beam suspension;

Fig. 2 is the top view of torsion beam suspension in this technology;

Fig. 3 is the bottom view of the left side of Fig. 2;

Fig. 4 is a sectional view along the vehicle longitudinal plane of the beam in Fig. 3;

Fig. 5 is the connection mode between the trailing arm and the bushing of the torsion beam suspension of the present invention;

The marks in the above figures are: 1, beam; 2, longitudinal arm; 3, base plate; 101, transverse part of the beam; 102, vertical part of the beam; 103, fixing hole of hub shaft bracket;

Detailed ways

Referring to Fig. 1, it can be seen that the new torsion beam suspension includes a beam 1 and a longitudinal arm 2, wherein the beam 1 is composed of a horizontal part 101 of the beam and a vertical part 102 of the beam, and the vertical part 102 is extended by bending the two ends of the horizontal part 101 of the beam , the cross beam 101 and the cross beam vertical portion 102 constitute a U-shaped beam 1, and the beam 1 is integrally formed, which fully ensures the strength of the connecting part between the beam 1 and the longitudinal arm 2, and improves the service life of the torsion beam. As shown in Figure 3, the end portion of the crossbeam 101 of the crossbeam 1 has a section of smooth curved transition cutting curved surface, and the cross-sectional view of the middle part of the body of the crossbeam 101 is a C-shaped tube as shown in Figure 4, and the cross-sectional shape of the crossbeam It can be properly optimized according to the actual situation of the vehicle. In this way, the rigidity and torsional strength of the beam 1 are ensured, and at the same time, the consumption of materials is reduced as much as possible, thereby reducing the mass of the whole vehicle. When the torsion beam suspension is fixed on the vehicle body, the opening direction of the C-shaped pipe faces the rear lower part of the vehicle, which can not only increase the height of the vehicle's roll center, effectively reduce the vehicle's roll angle, but also effectively avoid the accumulation of mud in it, reduce the Advantages of driving wind resistance.

A longitudinal arm 2 is fixed at the end of the transverse part 101 of the beam along the opposite direction of the longitudinal part 102 of the beam. The end of the longitudinal arm 2 is provided with a bushing installation hole 201. As shown in 5, the front end of the longitudinal arm 2 is stamped to form a bushing installation space. It is not necessary to install rubber bushings through a connecting bracket like traditional torsion beams, reducing parts and processes. The material of trailing arm 2 is circular steel pipe, which is formed by punching and folding, and is connected to beam 1 by welding, and supported on the vehicle body through the rubber bushing at the front end. By adjusting the welding surface design of the trailing arm 2 and the beam 1, the attitude change of the torsion beam suspension can be completed, so that components such as shock absorbers and springs will not be changed, which facilitates the platform-based development and design of the vehicle.

The front ends of the longitudinal arms 2 at both ends of the beam 1 are flared, and the flare angle is 8-15 degrees. The specific angle can be properly optimized according to the actual state of the vehicle, the theoretical requirements of vehicle dynamics and the stiffness performance of the bushing. The flared design ensures the handling stability of the vehicle when turning, and can play a very good role in safeguarding the understeer of the vehicle when driving.

As shown in Figure 3, a base plate 3 is welded between the transverse part 101 of the beam and the vertical part 102 of the beam. The base plate 3 is arranged with a spring base and a shock absorber fixing pin. The hole 103 is used to install the hub axle bracket, and the rear wheel and related components are supported by the hub axle bracket 1 .

The present invention has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner, as long as various insubstantial improvements are carried out by adopting the method concept and technical solutions of the present invention, or without Improvements that directly apply the concept and technical solutions of the present invention to other occasions are within the protection scope of the present utility model.

Claims (6)

1. A new type of torsion beam suspension, including a beam (1) and a longitudinal arm (2), characterized in that: the beam (1) includes a beam cross section (101), and its two ends are bent in the same direction Extending to form a U-shaped beam vertical part (102), the end of the beam horizontal part (101) is fixed with a longitudinal arm (2) along the opposite direction of the beam vertical part (102), and the end of the longitudinal arm (2) is provided with bushing mounting holes (201). 2. A novel torsion beam suspension according to claim 1, characterized in that: a bottom plate (3) is welded between the horizontal part of the beam (101) and the vertical part of the beam (102), and the bottom plate ( 3) The spring base and the shock absorber fixing pin are arranged. 3. A new type of torsion beam suspension according to claim 2, characterized in that: the cross part (101) of the beam is a C-shaped tube, and when the torsion beam suspension is fixed on the vehicle body, the opening direction of the C-shaped tube faces the lower rear of the vehicle. 4 . The novel torsion beam suspension according to claim 3 , characterized in that: a wheel hub shaft bracket fixing hole ( 103 ) is provided at the outer side of the end of the longitudinal part ( 102 ) of the beam. 4 . 5. The novel torsion beam suspension according to any one of claims 1-4, characterized in that: the two longitudinal arms (2) are fixed at the ends of the cross beam (101) at an outward flare angle 8-15 degrees. 6. The novel torsion beam suspension according to any one of claims 5, characterized in that: the longitudinal arm (2) is connected to the beam (1) by welding.

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