KR20030017670A - Rear suspension system for veicles - Google Patents

Abstract

PURPOSE: A rear suspension system is provided to improve turning stability by controlling a toe in bumping, to supply comfortable riding by absorbing readily cross-force, to increase the gripping force of a rear wheel, and to improve efficiency by taking the stable posture of a vehicle by suppressing a braking torque in driving and in braking. CONSTITUTION: A rear suspension system is composed of a wheel carrier(2) supporting a wheel to rotate, lower and upper control arms, a shock absorber(8) and a coil spring(10) connecting the lower and upper of the wheel carrier with a vehicle body. The lower control arm(4) is the shape of "A", two coupling units of the vehicle body(12)(14) are connected by revolute joints, and one coupling unit of the wheel(16) is connected by spherical joints. Coupling units(18)(20) for the vehicle body and the wheel of the upper control arm(6) are connected by spherical joints. A torque link(24) is connected with the wheel carrier by the revolute joint in the condition of the lower and upper side of coupling units for the wheel being in vertical.

Description

Rear suspension system for vehicles {Rear suspension system for veicles}

The present invention relates to a rear wheel suspension of an automobile, and more particularly, to a rear wheel suspension capable of high performance while simplifying the configuration.

Suspension in a vehicle exists between a vehicle body and a wheel, and is a device that connects these two rigid bodies by using one or more links. It is supported by springs and hydraulic shock absorbers in the vertical direction, and in other directions. By properly matching the high rigidity and flexibility, it performs a function to mechanically match the relative movement between the vehicle body and the wheel.

The suspension system effectively blocks irregular input of the road surface generated while driving the vehicle, providing a comfortable ride to the occupant, and provides driving convenience by appropriately controlling the shaking of the vehicle body caused by the driver's driving behavior and the curvature of the road surface. In the case of driving on irregular roads, the vertical load on the tire ground surface should be maintained at an appropriate level to satisfy the basic conditions of ensuring the maneuverability and stability of the vehicle during turning and braking.

In order to satisfy these conditions, the attitude of the wheel by the suspension geometry is very important. The attitude of the wheel varies greatly according to the relative movement with the vehicle body, and the overall performance of the vehicle is greatly increased according to the changing attitude of the wheel. It will depend.

Accordingly, the recent suspension system has been developed in various ways to meet the above requirements, and has been steadily evolving in its own way. In particular, in recent years, with the advent of a high-power engine, it has become more important to consumers' "fun to drive". As the preference for a user rapidly increases, the emergence of a high performance suspension system that can express the driver's will pleasantly is strongly required.

However, rear suspension systems such as the trailing arm type, the torsion beam axle type, the strut type, and the double wishbone type, which have been developed and used to date, are insufficient to sufficiently satisfy the above requirements.

Accordingly, in recent years, multi-link suspension systems have been developed and applied to mass production vehicles that can effectively accommodate shocks and vibrations input from the road surface using at least three or more links and vibrations of the vehicle body as ideal kinematic movements.

However, in the case of a general suspension system that has already been developed, it has the advantage of high performance, but the structure is complicated, the number of parts, the volume is increased and the weight is increased, as well as fuel consumption and exhaust regulation related problems, production costs are high, price It is inferior to the competition and implies a problem of lowering the merchandise.

In addition, in the case of the general multi-link suspension, which has already been developed, a slight improvement in performance has been achieved, but there are limitations in realizing the wheel posture ideally. As the production cost increases, manufacturing costs are increased, and the space utilization rate is lowered.

Therefore, the present invention improves the turning stability by bump tow control, and easily absorbs the lateral force to improve the riding comfort and grip force of the rear wheel, and maintains a stable vehicle posture by suppressing the braking torque during driving and braking. It is to provide a rear wheel suspension of a vehicle capable of high performance.

1 is a perspective view of a suspension device according to the present invention.

2 is a rear view of FIG. 1.

3 is a plan view of FIG.

Figure 4 is a three-dimensional schematic diagram of the suspension of the present invention.

5 is a view showing the position of the connecting portion of each arm to be applied to the present invention.

In order to achieve the above object, the present invention is a wheel carrier for rotatably supporting a wheel; A suspension device comprising a proper number of lower and upper control arms arranged in the vehicle width direction and connecting the lower and upper parts of the wheel carrier with the vehicle body side, and a shock absorber and a coil spring as shock absorbing means.

The lower control arm is “A” shaped so that the two body side connections are connected by a revolut joint, the one wheel side connection is connected by a spherical joint, and the upper control arm is connected to both the body side and the wheel side connections by Sperry. Connected by curl joint,

Torque is connected to the vehicle body by spherical joints, and the upper and lower connection parts of the wheel side are connected to the vehicle carrier by vertical revolving joints. Retaining the link, wherein the wheel side connection of the torque link is positioned below the front of the wheel center.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described in detail.

1 to 4 are diagrams of a suspension according to the present invention, wherein 2 denotes a wheel carrier 2 rotatably supporting a wheel.

In connecting the wheel carrier 2 to the vehicle body, the lower part is connected to the vehicle body by a lower control arm 4 arranged in the vehicle width direction, and the upper part is connected to the vehicle body by an upper control arm 6 arranged in the vehicle width direction. Connected.

A shock absorber 8 and a spring 10 are disposed as the cushioning means.

The lower control arm 4 has an “A” shape, and the two body parts 12 and 14 are connected by a revolute joint, and the one wheel side connector 16 is a spherical joint. Spherical Joint).

Unlike the lower control arm 4, the upper control arm 6 is connected to both the vehicle body side and the wheel side connecting portions 18 and 20 by spherical joints.

In addition, the shock absorber shock absorber (8) and the spring 10 is separated and the shock absorber (8) is connected to the vehicle body in a substantially vertical state with the lower end connection portion 22 connected to the wheel carrier (2). The spring 10 has a configuration interposed between the middle portion of the lower control arm 4 and the vehicle body.

In such a suspension device, the present invention has arranged a "A" type torque link 24 on the front side of the wheel carrier 2.

The body side connection part 26 of the torque link 24 is connected to the vehicle body by a spherical joint, and the two upper and lower connection parts 28 and 30 on the wheel side are connected to the wheel carrier by a revolute joint in a vertical state. The wheel side connections 28 and 30 are located at the front lower portion of the wheel center WC.

When the lower and upper control arms 4 and 6 and the torque link 24 are arranged in this way, the wheel side connecting portions 16, 20, 28 and 30 are positioned as shown in FIG.

Accordingly, when the lateral force is input to the wheel center (WC) side, each connecting portion is absorbed while forming almost three angles, so that the effective absorption is achieved to improve the riding comfort and improve the grip of the wheel.

When the braking torque is generated by braking and driving, the wheel-side connecting portions 28 and 30 of the torque link 24 are connected to a revolute joint having a vertical axis in the vertical state, thereby, in this state. Even if braking torque is input through the torque link 24 due to the vehicle body tilting, it can be suppressed, thereby maintaining a stable vehicle posture, thereby realizing a high level of performance.

In addition, when the wheel bumps according to the road surface conditions or driving conditions, the torque link 24 pulls the front part of the wheel carrier 2, and the tow is controlled to "0" or "-", thereby improving the followability. It will be able to improve the stability when turning.

As described above, according to the present invention, by connecting the wheel carrier and the vehicle body as three links, the configuration is very simple as well as toe control during bump due to their effective arrangement to improve turning stability, input of the lateral force It is an invention that can be easily absorbed to improve the riding comfort and to increase the grip force of the rear wheel, to suppress the braking torque during driving and braking to maintain a stable vehicle attitude and to improve the performance.

Claims (2)

A wheel carrier rotatably supporting the wheel; A suspension device comprising a proper number of lower and upper control arms arranged in the vehicle width direction and connecting the lower and upper parts of the wheel carrier with the vehicle body side, and a shock absorber and a coil spring as shock absorbing means. The lower control arm is “A” shaped so that the two body side connections are connected by a revolut joint, the one wheel side connection is connected by a spherical joint, and the upper control arm is connected to both the body side and the wheel side connections by Sperry. Connected by curl joint, Torque is connected to the vehicle body by spherical joints, and the upper and lower connection parts of the wheel side are connected to the vehicle carrier by vertical revolving joints. Rear suspension of the vehicle including a link. The rear wheel suspension of a vehicle according to claim 1, wherein the wheel side connection portion of the torque link is located at the front lower portion of the wheel center.