KR19980035042A - Suspension Lower Control Arm - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower control arm of a suspension device in which one end is connected by a ball joint to a steering knuckle on which a wheel and a tire are supported, and the other end is connected to a vehicle body via a bushing. The shorter the arm, the greater the displacement of the tread, and the lower the ride comfort. To this end, the present invention provides that the first and second links 6a and 6b disposed up and down are connected between the connecting member 7 fixed to the ball joint 4 and the subframe 5 of the vehicle body; The roll center that the extension line of the two links is made of a technical configuration to be formed on the opposite outer side of the vehicle body relative to the ball joint.

Description

Suspension Lower Control Arm

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower control arm of a suspension device, and more particularly to a lower roll center (or a center of rotation) of a lower control arm so as to suppress tread displacement of wheels and tires when the vehicle body vibrates up and down. Relates to a control arm.

As is well known, the suspension of the vehicle supports the weight of the vehicle body and at the same time buffers the up and down vibrations of the wheels generated from the road surface, so that possible vibrations are not transmitted to the vehicle body.

The main function of such a suspension system is to (A) provide flexibility in the vertical direction of the vehicle so that the vehicle body can be driven on irregular roads without being affected by the pressure from the road surface,

(B) maintaining the road wheels in the proper position and condition to have a minimum load change with respect to the road surface;

(C) corresponding to the vertical and lateral forces and braking and driving forces generated by the tire,

(D) It is largely to suppress the vehicle body vibrations and to secure the running stability of the vehicle.

Such suspensions are structurally characterized as axle integral and independent.

Here, the general independent suspension device is a shock absorber (2), the lower end of which is fixed to the steering knuckle (not shown), the wheel (1) is rotatably supported as shown in Figure 1 and the upper end is supported on the vehicle body; It consists of a lower control arm 3 which is fixed to the steering knuckle by a ball joint and which at least two points are fixed to a subframe (not shown) under the vehicle body.

The lower control arm 3 is mounted in a structure in which a bolt penetrating the center of the bushing is fixed to a subframe of the vehicle body via a bushing not shown.

In the above-described suspension of the prior art, the lower control arm 3 has a problem in that the length of the lower control arm 3 is short because the tread of the wheel and the tire is limited.

This short length lower control arm 3 shortens the length from the subframe 5 of the vehicle body to the roll center, for example the ball joint 4, as shown in FIG. And the tread of the wheel and the tire during the up and down vibration of the vehicle body such as) and rebound.

In this case, the vehicle has a large amplitude in the up, down, left, and right directions, thereby reducing the riding comfort.

As proposed for the purpose of solving the problems of the prior art, the present invention is to increase the distance between the roll center of the lower control arm and the vehicle body, so that the tread displacement of the wheel and tire is reduced, and the riding comfort can be improved.

1 is a block diagram showing a suspension of a typical vehicle.

Figure 2 is a front view showing the lower control arm of a conventionally known suspension.

Figure 3 is a front view showing the lower control arm of the suspension according to the present invention.

4 is a view illustrating the relationship between the upper and lower vibration displacement of the tread and the vehicle body, showing the effect of the present invention.

* Description of the symbols for the main parts of the drawings *

4-ball joint 5-subframe

6a-first link 6b-second link

7-connecting member

In order to realize the above object, the present invention proposes a lower control arm of a suspension device constituted by the following means.

That is, the present invention is a lower control arm in which one end is connected by a ball joint to a steering knuckle on which a wheel and a tire are supported, and the other end is connected to a vehicle body via a bushing, wherein two links disposed up and down are connected to each other. Connected to the ball joint and the car body; The roll center where the extension lines of the two links meet consists of a technical configuration formed on the opposite outer side of the vehicle body with respect to the ball joint.

According to this configuration, the roll center of the lower control arm formed by the two links is formed outside the vehicle body by a predetermined distance, thereby increasing the actual length between the vehicle body and the roll center.

Therefore, the tread displacement becomes smaller with respect to the upper and lower vibrations of the vehicle body, and the riding comfort is improved by decreasing the flow in the up, down, left and right directions.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment for implementing this invention is demonstrated in detail based on an accompanying drawing.

EXAMPLE

3 is a front view of the lower control arm of the suspension system according to the present embodiment, as seen from the front of the vehicle body.

In describing the present embodiment, the same reference numerals are used for the configuration of the present embodiment, which is the same as the drawings cited in the prior art, and will not be described again for clarity.

In the drawings, reference numeral 4 denotes a ball joint connected to a steering knuckle, and 5 denotes a subframe of the vehicle body.

A lower control arm is connected as described above between the ball joint 4 connected to the steering knuckle and the subframe 5 of the vehicle body.

Here, the lower control arm according to the present embodiment has a technical configuration of minimizing the displacement of the tread of the wheel and the tire, in order to solve the problems of the prior art.

In order to realize this, in the present embodiment, two links arranged up and down are arranged in order to increase the distance between the roll center C, which is the center of rotation, and the vehicle body while the actual length of the lower control arm is limited. The ball joint 4 and the subframe 5 of the vehicle body are installed.

The link consists of a first link 6a and a second link 6b which are connected via a bushing to a connecting member 7 fixed to the ball joint 4. In addition, the first and second links 6a and 6b are spaced up and down in the subframe 5 of the vehicle body and are connected via bushings.

In this case, the distance between the first link 6a and the second link 6b is smaller in the ball joint 4 side than in the subframe 5 side of the vehicle body. The reason is for the roll center C of the lower control arm formed at the point where the extension lines of the first and second links 6a and 6b meet to be located outside the vehicle body.

Based on the above-described configuration, the roll center C of the lower control arm of the present embodiment is formed on the outer side where the extension lines of the first and second links 6a and 6b coincide and are separated by a predetermined distance from the vehicle body, This results in an increase in the distance between the body and the vehicle.

By this action, the tread of the wheel and the tire can be seen that the displacement is smaller than the lower control arm of the prior art with respect to the up and down vibration of the vehicle body, as shown in FIG.

Of course, the flow in the up, down, left and right directions of the vehicle body is reduced in correspondence with the displacement of the tread, thereby improving the riding comfort.

Through the embodiments described above, it can be seen that the lower control arm of the suspension device according to the present invention substantially solves the problems of the prior art.

That is, according to the present invention, the roll center of the lower control arm becomes long, the tread displacement of the wheels and tires with respect to the vibration of the vehicle body is reduced, and the riding comfort is improved.

On the other hand, the present invention is not limited to the above-described specific preferred embodiment, and any person having ordinary skill in the art to which the invention belongs without departing from the gist of the invention claimed in the claims, various modifications Would be possible.

Claims (2)

A lower control arm connected to a steering knuckle on which wheels and tires are supported, and connected to the vehicle body via a bushing, wherein two links arranged up and down between the ball joint and the vehicle body are connected; The lower control arm of the suspension system, characterized in that the roll center where the extension lines of the two links meet is formed on the opposite outer side of the vehicle body with respect to the ball joint. The suspension device according to claim 1, wherein the link comprises a first link and a second link arranged up and down and connected by a bushing between the connection member fixed to the ball joint and the vehicle body. Lower control arm.