KR20080082728A

KR20080082728A - Separated coupled torsion bar type suspension in vehicle

Info

Publication number: KR20080082728A
Application number: KR1020070023363A
Authority: KR
Inventors: 박종우
Original assignee: 현대모비스 주식회사
Priority date: 2007-03-09
Filing date: 2007-03-09
Publication date: 2008-09-12

Abstract

A separated coupled torsion bar type suspension in vehicle is provided to improve riding comfort even when bump/rebound applied to two wheels is greatly different from each other by integrating separated coupled torsion beams into a bar type assembly, so that two ends of the bar type assembly independently absorb impact. A separated coupled torsion bar type suspension in vehicle comprises a torsion bar(1) mounted on a support bracket which is coupled to a coupled of trailing arms(6). The torsion bar includes a left torsion bar(2) and a right torsion bar(3) that have first sides coupled to a wheel(W) through a bush(5) and second sides, which are spaced apart from each other. A rotation joint(4) covers the second sides of the left and right torsion bars. The trailing arm includes a front-end trailing arm(7) having a first end coupled to the vehicle through a bush and a second end connected to the bush coupled to the torsion bar. A rear-end trailing arm(8) is hinged on the bush coupled to the front-end trailing arm.

Description

Separated coupled torsion bar type suspension in vehicle

1 (a), (b) is a block diagram of a detachable coupled torsion bar type vehicle suspension apparatus according to the present invention

2 is an operating state diagram of the detachable coupled torsion bar type suspension device according to the present invention;

1: torsion bar 2,3: left and right torsion bar

4: rotary joint 5,9: bush

6: trailing arm 7: shear trailing arm

8: trailing trailing arm

W: Wheel

The present invention relates to a vehicle suspension, and more particularly to a separate coupled torsion bar type vehicle suspension adapted to independently respond to bump / rebound.

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

In other words, the suspension system provides flexibility in the up and down direction of the vehicle, allowing the vehicle to travel on irregular roads without being affected by the roughness of the road, while maintaining the wheels in proper steering and camber positions relative to the road surface. In addition, it responds to the horizontal and lateral forces and the braking and driving forces generated by the wheels, and serves to suppress rolling of the vehicle body.

Among these suspension devices, the coupled torsion beam type suspension device is an axle-integrated type for the purpose of miniaturization and light weight, and includes a shock absorber that buffers external forces generated from the road surface, a coupled torsion beam installed to connect both wheels, and the torsion beam It is composed of a lateral rod installed in parallel to the left, right, up and down force to control and a pair of trail arms connected vertically to both sides of the torsion beam to control the front, rear, up and down force. .

However, such coupled torsion torsion beams operate with both wheels staggered to the left, right (up and down) and back and forth, i.e. when the wheel center phase difference occurs between both wheels (roll). Rolling is controlled by generating a torsion to the site, but due to the nature of the coupled torsion beam being integral with the axle, the bump / rebound of one wheel cannot affect the other wheel. In particular, when the bump / rebound of both wheels is severely different, the riding comfort is greatly reduced.

Accordingly, the present invention has been made in view of the above, and the coupler torsion beams constituting the suspension device are coupled to each other in a state in which they are separated from each other, so that both ends of the bushing torsion bar are independently of each other. Its purpose is to prevent torsion even when the bump / rebound of both wheels is severely different due to the torsional absorption effect.

In order to achieve the above object, the present invention provides a coupled torsion bar type rear wheel suspension mounted on a support bracket portion coupled to a pair of trailing arms that control the front, rear, top, and bottom forces, The shock absorber is installed together with the chassis spring to cushion the generated external force, and the torsion bar that generates torsion when rolling the vehicle is connected to both wheels.

The torsion bar is connected to each other by connecting the left and right torsion bar and the left and right torsion bar which are opposite to each other while the other side is fastened to each other through the bush as a medium, and the opposite to the left and right torsion bar. Made of joints,

The trailing arm has a top trailing arm sharing a bush coupled to the torsion bar, one end of which is fastened to the vehicle body via a bush, and a bush fastened to the torsion bar and shear trailing arm as a hinge point. Characterized in that it consists of a trailing trailing arm with a lower rotation behavior.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 (a), (b) is a block diagram of a detachable coupled torsion bar type vehicle suspension device according to the present invention bar, as long as the suspension device of the present invention controls the force of the front, rear, top and bottom A torsion bar mounted to a support bracket coupled to a pair of trailing arms 6 and equipped with a shock absorber together with a chassis spring to cushion external force generated from the road surface, and a torsion bar that generates torsion when rolling the vehicle ( 1) is connected to both wheels (W),

The torsion bar 1 is coupled to the left and right torsion bars 2 and 3 which are fastened to each side of the wheels W through the bushes 5, and the opposite parts thereof are not in contact with each other. The left and right torsion bars (2, 3) is formed by rotating the joint (4) wrapped around and connected to each other.

Here, the rotary joint 4 is a hollow inner surface into which the ends of the left and right torsion bars 2 and 3 are inserted so as to be fastened to each other by using screw portions formed at both ends of the left and right torsion bars 2 and 3. A screw is formed, and both screws are formed in opposite directions (left and right screws).

In addition, the trailing arm 6 has a trailing arm 7 and a trailing trail that have a hinge point of the bush 5 for fastening the left and right torsion bars 2 and 3 located on both side wheels W. It is separated into a ring arm (8), that is, the shear trailing arm (7) has one end fastened to the vehicle body via the bush (9) while the opposite side shares the bush (5) fastened to the torsion bar (1). The trailing trailing arm 8 has an upper and lower rotational behavior while the hinge 5 is connected to the torsion bar 1 and the trailing trailing arm 7 as a hinge point.

When the rear suspension is configured as a coupled torsion torsion bar type separated from each other, that is, as shown in FIG. 1, the torsion bar 1 is spaced apart from each other and the left and right torsion bars 2 and 3 are opposed to each other. Are connected to each other via the rotary joint 4, and the left and right torsion bars 2 and 3, which are fastened to both side wheels W, are respectively fastened via the bushes 5, so that the bumps / rebounds are left and right. Right torsion bars (2, 3) are each generated independent torsion.

In addition, the trailing arm 6 which shares the bush 5 with the left and right torsion bars 2 and 3 also has the bush 5 as a hinge point, and the front and rear trailing arms which independently behave (7). As a result of having a structural feature consisting of (8), even if the bump / rebound of both wheels is severely different, the vehicle does not reduce the riding comfort.

As shown in FIG. 2, when bumps or rebounds are largely generated on one of the wheels W, the left and right torsion bars 2 and 3 connected to each other via the rotary joint 4 are shown. Compared to the left torsion bar (see FIG. 2) where bumps or rebounds are generated in a small amount, a relatively large behavior is generated in the right torsion bar (see 3, FIG. 2) where bumps or rebounds are generated.

That is, the left torsion bar 2 with small bumps or rebounds is almost unchanged in motion, while the right torsion bar 3 with large bumps or rebounds is torsionally generated and the trailing arm 6 is also twisted. As the rotational behavior occurs by using the bush 5 as a hinge point, the restoration of the torsion bar 1 and the trailing arm 6 through the bush 5 is quick.

This restoring action is performed when the right torsion bar 3 and the bush (when the right torsion bar 3 forms a torsion due to the wheel W subjected to the lifting force (bump) or the lowering force (rebound) by bump or rebound. 5) The trailing arm 8 of the trailing arm 8 sharing the 6 generates the lifting force (bump) or the lowering force (rebound) with the bush 5 as the center of rotation.

Thus, the bush 5 which enables the rotational movement of the trailing trailing arm 8 has a restoring force, that is, the bush which has been elastically deformed when the right torsion bar 3 and the trailing trailing arm 8 are restored ( As 5) is restored to the initial state through the elastic force, even when a rolling occurs, even if bumps or rebounds are greatly generated on the wheels W, the riding comfort does not deteriorate.

At this time, the shear trailing arm 7 which is fastened toward the vehicle body through the bush 9 as compared to the trailing trailing arm 8 does not behave, which causes the shear trailing arm 7 to be bushed 5. This is because it behaves independently of the trailing trailing arm (8).

As described above, according to the present invention, the torsion bar is made of a left and right torsion bar that is connected independently through a rotary joint in a state in which the torsion bars are separated from each other, and the trailing arm also shares a bush to fasten the left and right torsion bars. It consists of front and rear trailing arms that behave independently of each other, and the left and right torsion bars behave independently of each other through the rotating joints when bump / rebound the two wheels, which are significantly different in behavior. In addition, the front and rear trailing arms also act independently of each other in the shared state of the bush to which the torsion bar is connected, so that even a coupled torsion torsion bar type can realize an excellent ride feeling like an independent suspension method.

In addition, the coupled torsion torsion bar type of the present invention has a restoring force by the bush as the left / right torsion bar and the front / rear trailing arms share a return bushing according to the bump / rebound of the wheel through the bush shared with each other. As a result, compared to the independent suspension method, the quick resilience can be improved, and accordingly, the advantages of the coupled torsion torsion bar type and the independent suspension method can be realized.

Claims

It is equipped with a support bracket part coupled to a pair of trailing arms 6 that controls the front, rear, top, and bottom forces, and a shock absorber is mounted together with the chassis spring to cushion external force generated from the road surface. Torsion bar (1), which causes torsion during rolling, is connected to both wheels (W),

The torsion bar 1 is coupled to the left and right torsion bars 2 and 3 which are fastened to each side of the wheels W through the bushes 5, and the opposite parts thereof are not in contact with each other. It consists of a rotary joint (4) that wraps and fastens the left and right torsion bars (2, 3) and connects them.

The trailing arm 6 has a shear trailing arm 7 having one end coupled to the vehicle body side via the bush 9 while the opposite side shares the bush 5 fastened to the torsion bar 1, and the torsion. Separated coupled torsion bar type, characterized in that it consists of a trailing arm (8) for up and down rotational behavior while the bush (5) fastened to the bar (1) and the front trailing arm (7) as a hinge point. Car suspension.