KR19990031634U - Car rear suspension - Google Patents

Abstract

When the vehicle tolerance is low and the loading load is small, the spring constant of the suspension can be reduced to improve the impact mitigation effect, and the number of parts can be reduced by using one rubber spring by eliminating the equalizer member and using one rubber spring in comparison with the prior art. Front and rear axles connected to the wheel side to provide a vehicle rear suspension that can reduce the cost and reduce the installation space; A base bracket rotatably connected to the front and rear axles and the front and rear torque rods, respectively, and connected to a vehicle body side; Primary shock absorbing means installed between the front and rear rear torque axles and the base bracket to absorb a primary shock of light tolerance and light loads of the vehicle; The vehicle is provided with a rear suspension including a secondary shock absorbing means interposed between the front and rear rear torque axle side to absorb secondary shocks as the load of the vehicle increases.

Description

Car rear suspension

The present invention relates to a suspension device, and more particularly to a rear suspension in which a rubber spring is used.

In general, the suspension system is installed between the axle and the body to prevent the axle from impacting or vibrating from the road when the vehicle travels directly to the body, thereby preventing damage to the body or cargo and improving ride comfort. .

Among these suspensions, the rear suspension used on the rear wheel side is disposed between the front and rear axles 102 and 104 mounted on the wheel side and the base bracket 106 connected to the vehicle body side as shown in FIG. Rubber springs 108 and 110 are mounted, respectively.

That is, the equalizer member 118 is rotatably mounted about the hinge shaft 116 at the lower end side of the base bracket 106, and both front ends of the equalizer member 118 are the front axle 102 and the rear axle ( 104 is rotatably connected by the front torque rod 112 and the rear torque rod 114, and the front rubber rod 108 is mounted between the front torque rod 112 and the equalizer member, and the rear torque rod A rear rubber spring 110 is mounted between the 114 and the equalizer member.

The front and rear rubber springs 108 and 110 alleviate the shock and vibration transmitted to the vehicle body through the wheel side.

However, as described above, the rear suspension is cushioned only by the rubber spring, and the rubber spring has a large spring constant, so when the vehicle's tolerance or the loading load is small, the impact relaxation effect is not properly performed, thereby reducing the riding comfort. There is this.

Therefore, the present invention was devised to solve the above problems, and the object of the present invention is to provide a vehicle rear suspension which can improve the shock mitigation effect by reducing the spring constant of the suspension when the vehicle tolerance and loading load is low. It is.

Another object is to provide a rear suspension for a vehicle that eliminates the equalizer member and uses a single rubber spring in comparison with the prior art, resulting in a reduction in the number of parts and the resulting cost, and an installation space in the vehicle.

1 is a cross-sectional view of the rear suspension according to the present invention,

2 is a cross-sectional view of a rear suspension according to the prior art.

The present invention to achieve the above object and the front and rear axle connected to the wheel side; A base bracket rotatably connected to the front and rear axles and the front and rear torque rods, respectively, and connected to a vehicle body side; The vehicle is disposed between the front and rear rear torque axles and the base bracket, and is provided between the front and rear rear torque axles, and primary shock absorbing means for absorbing the first shock when the vehicle tolerance is light and the load is light. It provides a vehicle rear suspension comprising a secondary shock absorbing means for absorbing secondary shocks as the load increases.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a cross-sectional view of the rear suspension according to the present invention, the front and rear axles (2), (4) mounted on the wheel side, the base bracket (6) mounted on the vehicle body side, and the wheels mounted therebetween It includes a buffer means for blocking the vibration and shock transmitted to the vehicle body side from the road surface.

The upper torque rod () is rotatably installed between the upper side of the front axle (2) and the upper end of the base bracket (6), and the upper torque rod between the upper end of the rear axle (49) and the upper end of the base bracket (6). 10 is rotatably installed.

In addition, the lower torque rods 12 and 14 are rotatably provided between the lower ends of the front and rear axles 2 and 4 and the lower ends of the base bracket 6, respectively.

The front lower torque rod 12 connecting between the front axle 2 and the base bracket 6 has one end coupled to the front axle 2 and the hinge 16 and the other end hinged to the base bracket 6. (18) is connected to rotate about the center.

In addition, one end of the rear lower torque rod 14 connecting the rear axle 4 and the base bracket 6 is coupled to the rear axle 4 and the hinge 20, and the other end of the rear axle 4 is connected to the lower end side of the base bracket 6. It is connected to rotate about the hinge axis (24).

A cushioning means is provided between the front and rear lower torque rods 12 and 14 and the base bracket 6.

The shock absorber is installed between the front and rear lower torque rods 12, 14 and the base bracket 6, respectively, to alleviate the primary shock and vibration transmitted through the wheels when the vehicle tolerance and loading load are small. It consists of a primary shock absorbing means, and a secondary shock absorbing means for mitigating secondary shock and vibration as the load of the vehicle increases.

The primary shock absorbing means includes a first spring seat 26 extending at a predetermined angle from the hinge shaft 18 of the front lower torque rod 12 and one side hinge 38 at a lower end of the base bracket 6. The first suspension gas spring 34 interposed between the first spring plate 28 to be coupled and the second spring seat 30 extending at a predetermined angle from the hinge shaft 24 of the rear lower torque rod 14. ) And a second suspension spring 36 interposed between the second spring plate 32 having one side coupled to the hinge 40 at the lower end of the base bracket 6.

The first and second suspension gas springs 34 and 40 are formed of a coil spring set to a constant spring constant.

And the secondary shock absorbing means is a rubber spring which is fixed between the side and the opposite side in contact with the first and second suspension gas springs 34, 36 of the first and second spring plates 28, 32 ( 42).

The rear suspension is configured such that the primary shock and vibration transmitted to the front and rear rear axles through the wheels by the first and second suspension gas springs 34 and 36 when the vehicle is tolerant and the load weight is light. The secondary shock is finally absorbed by the rubber spring 42 as it is absorbed and the road surface is in a bad state or a heavy load weight.

The rear suspension according to the present invention made as described above is absorbed by the first and second elastic members when the tolerance of the vehicle and the light weight is light, and finally absorbs shock and vibration in the rubber spring as the weight of the vehicle is increased. By doing so, the riding comfort can be improved.

In addition, the structure is simple, the number of parts can be reduced, resulting in cost savings and installation space can be reduced.

Claims (4)

Front and rear axles connected to the wheel side; A base bracket rotatably connected to the front and rear axles and the front and rear torque rods, respectively, and connected to a vehicle body side; Primary shock absorbing means is provided between the front and rear rear torque axle and the base bracket to absorb the primary shock when the vehicle tolerance and light load is light; And a secondary shock absorbing means interposed between the front and rear rear torque axle sides to absorb secondary shocks as the load of the vehicle increases. The method of claim 1, wherein the primary shock absorbing means is a first spring seat extending at a predetermined angle from the hinge axis connected to the base bracket of the front torque rod, and the first spring plate is hinged to the lower end of the base bracket A first suspension gas spring installed at the; And a second spring gas spring installed between the second spring seat extending at a predetermined angle from a hinge shaft connected to the base bracket of the rear torque rod, and a second spring plate hinged to a lower end of the base bracket. Car rear suspension. The vehicle rear suspension according to claim 2, wherein the first and second suspension springs are made of coil springs. The vehicle rear suspension according to claim 1, wherein the secondary shock absorbing means comprises a rubber spring interposed between the first spring plate and the second spring plate.