KR20090051499A

KR20090051499A - Separated coupled torsion beam typed suspension in vehicle

Info

Publication number: KR20090051499A
Application number: KR1020070117917A
Authority: KR
Inventors: 박종우
Original assignee: 현대모비스 주식회사
Priority date: 2007-11-19
Filing date: 2007-11-19
Publication date: 2009-05-22

Abstract

According to the present invention, a CTBA (Coupled Torsion Beam Axle) type suspension device includes a torsion beam 1 connected to the trailing arm 2 by a mounting bush B, which is a rubber bush. ) Is connected to each other via the rubber bush type connecting member 3 to suppress the relative displacement of the left and right wheels by the twisting of the rubber bush type connecting insert 6 constituting the connecting member 3 between the torsion beams. Accordingly, while taking all the advantages of a CTBA (Coupled Torsion Beam Axle) type suspension device, it is possible to prevent the deterioration of ride comfort caused when using the rotational rigidity of the torsion beam material.

Torsion Beam, Rubber Bush, Separation

Description

Separated coupled torsion beam typed suspension in vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to vehicle suspensions and, more particularly, to a detachable coupled torsion beam type vehicle suspension.

In general, the suspension device of the vehicle is connected to the axle and the body to properly attenuate vibrations or shocks received by the axle from the road surface while driving, thereby improving damage to the body and riding comfort of the occupant.

In other words, by providing flexibility in the up and down direction of the vehicle, it is possible to drive the irregular road surface without being affected by the roughness of the road, while maintaining the wheels at the proper steering and camber position with respect to the road surface, Corresponding to the horizontal and lateral forces, the braking and the driving force generated by the control, and also to suppress the rolling (rolling) of the vehicle body.

In addition, a torsion beam that serves as a kind of torsion bar to maintain the balance of the vehicle body is prevented from being tilted while the load of the vehicle body is inclined when the vehicle is turned.

These torsion beams use the rotational stiffness of the material to suppress the relative displacement of the left and right wheels, i.e. when both wheels are raised and lowered at the same time, the torsion beam does not work but the left and right wheels move in the opposite direction (the car rotates). When it is twisted, it reduces the relative displacement of the left and right wheels, stabilizes the vehicle posture, and improves the driving and turning force of the vehicle.

As the torsion beam having such a function is composed of a simple structure, the change in driving may cause a deterioration of ride comfort in the case of bumps (rebound) other than the roll due to the characteristics of the suspension device, and thus the torsion beam By attaching a motor to the motor, the damping characteristics of the torsion beam can be controlled by the motor to prevent excessive rolls, especially when the vehicle is turning.

However, this method, that is, the change in the damping characteristics of the forced torsion beam using the power of the ECU-controlled motor, has an additional cost for mounting the damping control device and has a lot of space limitations. There is a vulnerability that cannot be done.

Accordingly, the present invention has been made in view of the above, and by using the torsion of the rubber bush when turning the vehicle by interposing a rubber bush between the torsion beams, all of the advantages of the CTBA (Coupled Torsion Beam Axle) type suspension system The purpose is to prevent deterioration of ride comfort while taking.

The present invention for achieving the above object, the suspension device is connected to both ends via a mounting bush to the trailing arm portion each torsion beam for controlling the rolling;

Elastic bush type which is located between the left and right torsion beams separated from each other of the torsion beams, and controls the rolling by twisting the left and right torsion beams according to the centrifugal force generated when the torsion beams are connected to each other. Connecting member;

Characterized in that consisting of.

The connecting member is composed of a left and right bush pipe coupled to the left and right torsion beams separated from each other, and an elastic bush type connecting insert coupled to and connected between the left and right bush pipes.

In addition, a serration is formed by the inner diameter of the left and right torsion beams, and a serration is also formed on the outer circumferential surface of the left and right bush pipes, and the left and right torsion beams and the left and right bush pipes are serration-coupled with each other. The left and right bush pipes, which are serration coupled to the left and right torsion beams, are press-fitted with each other and then weld the joint surface.

According to the present invention, by placing the rubber bush between the torsion beam to control the roll by using the twisting of the rubber bush when turning the vehicle, while taking all the advantages of the CTBA (Coupled Torsion Beam Axle) type suspension device, the ride comfort is reduced There is an effect that can be prevented.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

1 is a block diagram of a detachable coupled torsion beam type vehicle suspension apparatus according to the present invention, the detachable coupled torsion beam (1) constituting the suspension device according to the present invention is a trailing arm (2) Both ends of the torsion beams 1 are fastened to control rolling and the left and right torsion beams 1a and 1b of the torsion beams 1 are separated from each other, and the torsion beams 1 are connected to each other while turning. It consists of a connecting member 3 which controls the rolling by causing the left and right torsion beams 1a and 1b to be twisted according to the magnitude of the centrifugal force generated at the time.

At this time, the mounting bush (B) is provided at each of the trailing arm (2) to which the left and right torsion beams (1a, 1b) constituting the torsion beam (1) is fastened.

As described above, the connecting member 3 includes left and right bush pipes 4 and 5 coupled to left and right torsion beams 1a and 1b separated from each other, and the left and right bush pipes 4 and 5. It consists of a connection insert (6) which is coupled between and connected.

Here, the left and right torsion beams 1a and 1b and the left and right bush pipes 4 and 5 are combined in various ways. For example, the serration may be performed by the inner diameters of the left and right torsion beams 1a and 1b. 1a ', 1b'), and serrations 4a and 5a are also formed on the outer circumferential surfaces of the left and right bush pipes 4 and 5, and the left and right torsion beams 1a and 1b and left and right sides are formed. The bush pipes 4 and 5 are serrated together.

In addition, the connection insert 6 is made of various materials having elasticity, for example, is made of a rubber material.

Thus, the left and right bush pipes 4 and 5 for serration coupling the left and right torsion beams 1a and 1b separated from each other while forming the torsion beam 1 are pressurized with each other and then welded to the joint surface. The rigidity of the torsion beam is the most important design factor when the torsion beam is integrated, but the bush between the left and right torsion beams 1a and 1b is twisted as in the present invention. This is to reinforce this point because the torsion beam stiffness can be made relatively weak at.

In addition, the rubber bush type connecting insert 6 provided between the left and right bush pipes 4 and 5 connected to the left and right torsion beams 1a and 1b may be formed in front, rear, left, right and Due to the different stiffness for loading and unloading, the suspension can be tuned, so that the tunable factor can be increased compared to the integrated torsion beam CTBA structure.

As described above, the present invention provides a torsion beam 1a in which a coupled torsion beam axle (CTBA) type suspension device forms a torsion beam 1 connected to a trailing arm 2 by a mounting bush B, which is a rubber bush. , 1b) are connected to each other via the rubber bush type connecting member 3, and the relative displacement of the left and right wheels is controlled by the twisting of the rubber bush type connecting insert 6 constituting the connecting member 3 between the torsion beams. By suppressing, while taking all the advantages of the CTBA (Coupled Torsion Beam Axle) suspension system, it is possible to prevent the deterioration of riding comfort caused when using the rotational rigidity of the torsion beam material.

To this end, the torsion beam 1 of the present invention, as shown in Fig. 1, the left and right torsion beam (1a) is separated from each other by the end is connected to the trailing arm (2) located on both sides with a mounting bush (B) Roll of the torsion beam 1 by twisting the rubber bush, by connecting the portions separated by the left and right torsion beams 1a and 1b with each other with the rubber bush type connecting member 3. Control performance.

That is, the left and right bush pipes 4 and 5 are coupled to the left and right torsion beams 1a and 1b, respectively, which are connected to each other by the connecting member 3. , 5) is composed of a rubber bush type connecting insert (6) connecting each other.

At this time, the serrations 4a and 5a are also formed on the outer circumferential surfaces of the left and right bush pipes 4 and 5, and the serrations 1a 'and 1b' are used as the inner diameters of the left and right torsion beams 1a and 1b. ), The left and right bush pipes 4 and 5 are serration-coupled to the left and right torsion beams 1a and 1b so that when torsion occurs, the left and right torsion beams 1a and 1b and the left and right torsion beams 1a and 1b are combined. The right bush pipes (4, 5) are twisted to twist the connection insert (6).

As an example, the torsion beam 1 of the present invention is generated by the left torsion beam 1a on the left side, which is subjected to the up and down load, as shown in FIG. 2 when both suspensions (rear wheels) receive the up and down load. The total amount (twist) is generated larger than the amount of rotation (twist) generated in the right side torsion beam 1b.

The difference in the amount of rotation (torsion) of the left and right torsion beams 1a and 1b causes a difference in the restoring force of the connecting insert 6, that is, the left bush pipe 4 serration-coupled to the left torsion beam 1a side. The torsional deformation of the connection insert 6 portion through is greater than the torsional deformation of the connection insert 6 portion through the right bush pipe 5 serrated coupled to the right torsion beam 1b.

The connection insert 6 is caused to rotate by the up / down force at the rear of the trailing arm 2 fastened to the left torsion beam 1a on the left side, which is subjected to the up / down force. Due to this, the restoring force of the rubber bush type connecting insert 6 is added to the rotational force of the trailing arm 2, thereby quickly retracting. Thus, the roll control action of the torsion beam 1 has the rubber bush type connecting insert 6 It can be achieved through the elastic restoring force.

1 is a block diagram of a detachable coupled torsion beam type vehicle suspension apparatus according to the present invention

2 is an operation of the detachable coupled torsion beam type vehicle suspension apparatus according to the present invention.

1: Coupled Torsion Beam 1a, 1b: Left and Right Torsion Beam

1a ', 1b', 4a, 5a: Serration

2: trailing arm 3: connecting member

4,5 left and right bush pipe 6: connection insert

B: mounting bush

Claims

A torsion beam 1 connected to both ends of the trailing arm 2 via a mounting bush B to control rolling;

Located between the left and right torsion beams 1a and 1b of the torsion beam 1, which are separated from each other, and the left and right torsion beams 1a and 1b according to the centrifugal force generated when the torsion beam 1 is connected while being connected to each other. An elastic bush type connecting member 3 for controlling rolling by causing each to twist;

Detachable coupled torsion beam type vehicle suspension device, characterized in that consisting of.

2. The left and right bush pipes 4 and 5 coupled to the left and right torsion beams 1a and 1b, respectively, and the left and right bush pipes 4, respectively. 5) A detachable coupled torsion beam type vehicle suspension device, characterized in that it is composed of an elastic bush type connection insert (6) coupled to each other.

The serrations 1a 'and 1b' are formed by the inner diameters of the left and right torsion beams 1a and 1b, and also the outer peripheral surfaces of the left and right bush pipes 4 and 5 are serrations. And (4a, 5a), wherein the left and right torsion beams (1a, 1b) and the left and right bush pipes (4, 5) are serrated coupled to each other.

The separation type according to claim 3, wherein the left and right bush pipes 4 and 5, which are serration-coupled to the left and right torsion beams 1a and 1b, are press-fitted with each other and welded to the joint surface. Suspension device for coupled torsion beam type vehicles.

3. The detachable coupled torsion beam type vehicle suspension device according to claim 2, wherein the connecting insert (6) is made of a rubber material having elasticity.