KR960005202Y1 - Trailing arm linkage of vehicle - Google Patents

Abstract

None.

Description

Trailing arm fixing structure of car

1 is a perspective view showing a part of a trailing link-type suspension for showing the working part of the present invention.

Figure 2a, b is a perspective view of the bush applied to the present invention.

3 is an assembled cross-sectional view of the present invention.

4 is a plan view for explaining the operation of the present invention.

5 is a conventional cross-sectional view.

* Explanation of symbols for main parts of the drawings

1: trailing arm 2: wheel

10, 10 ', 22: bush 11, 11: body

12, 12 ': Circular groove 13, 13': circumferential jaw

20, 21: inner and outer pipe

The present invention relates to a trailing arm fixing structure in a link-type independent suspension, and more specifically, to satisfy the front and rear flexibility and torsional rigidity, and to increase the toe control function of the wheel to improve driving stability and The present invention relates to a trailing arm fixing structure of an independent vehicle suspension for improving braking stability.

Suspension in automobiles is a device that prevents damage to the vehicle body or cargo and improves ride comfort by preventing the axle from being directly transmitted to the vehicle body when vibrations or shocks received from the road surface when the vehicle is connected by connecting the axle and the vehicle body.

Suspension system of such a vehicle is largely divided into axle suspension type and independent suspension type, which is a link type independent suspension device having a trailing arm among the independent suspension systems to which the present invention relates. Most of them are supported by trailing arms and are mainly used for rear suspensions in front-wheel drive vehicles.

That is, the link type suspension device having the trailing arm is a combination of the wishbone type suspension device and the trailing arm type suspension device as shown in FIG. 1, and the trailing arm 1 has a rubber seat on the vehicle body side. The rear end of the wheel 2 is connected to the outside via a rubber bush, and the spring 5 and the shock absorber 6 are moved to the center of the inner upper and lower control arms 3 and 4 of the wheel 2. Strut arm (7) comprising a top end is connected to the vehicle body.

The link suspension configured as described above has a wishbone suspension and a trailing arm suspension configured to complement each other so as to offset their shortcomings and to function as an ideal suspension.

In the suspension system as described above, the rubber bush installed at the time of connection between the vehicle body and the trailing arm has a moderate degree of elasticity, and the ride comfort and steering stability of the vehicle largely depend on the performance of the rubber bush. As shown in FIG. 5, the rubber bush 52 used in the related art is formed to exhibit the same spring characteristics with respect to the front and rear displacement of the vehicle body, and is elastically inserted and fixed between the inner and outer pipes 50 and 51. The rotational vibration of the outer pipe 51 rotated by the lifting motion of the trailing arm 1 can be elastically absorbed.

However, in the case of using the conventional rubber bush as described above, since the spring characteristics of the front and rear forces are the same, when the direction and magnitude of the load which becomes the load of the connection between the trailing arm and the vehicle body change according to the driving conditions of the vehicle, There was a problem in that it could not be sufficiently coped with, and a considerable improvement was necessary in terms of riding comfort and adjustment stability.

Therefore, the present invention was devised to solve the conventional problems, and the purpose of the present invention is to satisfy the front and rear flexibility and torsional rigidity, and to increase the tow function control function of the wheel to improve driving stability and braking stability. To provide a vehicle's trailing arm fixing structure.

In order to realize this, in the present invention, in fixing the trailing arm to the support shaft, a rubber bush having a hardness of steel and weakness is mounted on both sides of the existing bush of the trailing arm, and the same rubber bush is mounted in the diagonal direction. It is intended to provide a fixed structure of the vehicle trailing arm to secure the trailing arm to the support shaft.

Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention that can specifically realize the above object is as follows.

1 is a partial perspective view of a link type independent suspension device for showing the application site of the present invention, in which the linking independent suspension device is coupled to the trailing arm 1 via a rubber bush on the side of the vehicle body and outwardly at the rear end thereof. The wheel 2 is connected via a rubber bush and has a strut arm 7 including a spring 5 and a shock absorber 6 at the center of the inner top and bottom control arms 3 and 4 of the wheel 2. This upper end is connected to the car body.

In the link independent suspension as described above, the present invention relates to a fixed structure of the vehicle body and the trailing arm (1), Figure 2 is a perspective view of a bush applied to the present invention, a degree having a strong strength The bush 10 is formed of a semi-circular body 11 having an appropriate length. The bush 10 has a semi-circular groove 12 corresponding to the outer diameter of the inner pipe 20 described later in the center of the upper surface of the body. And a circumferential jaw 13 protrudes on the circumference of one side tip,

2b is a bush 10 'having a relatively weak hardness, and a semicircular groove 12' and a peripheral jaw 13 'are formed in the semi-circular body 11' in the same manner as the steel hardness bush 10, By forming a rectangular long hole 14 between the inner diameter and the outer diameter of the body 11 ', the strength of the bush 10' is weaker than that of the steel hardness bush 10 by the long hole 14. .

In addition, the weak hardness bush (10 ') may form a long hole (14) as described above to weaken the strength, it is also possible to use a soft rubber.

3 is an assembled cross-sectional view of the present invention to which the bushes 10 and 10 'constituted as described above, and the rubber between the inner and outer pipes 20 and 21 fixed to the tip of the trailing arm 1. After the bush 22 is opened and the inner pipe 20 is fitted to the support shaft S, the rubber bush 1 is used to fix the trailing arm 1 to the vehicle body by means of fastening nuts not shown from the outside. 21, the bush 10 (10 ') is mounted on both sides, the steel hardness bush 10 is mounted on the front right and the left side of the rear, the weak hardness bush 10' is the front left and rear right It is in the future.

The above configuration is described as an example applied to the left rear wheel of the vehicle. In the case of the right rear wheel, the bushes 10 and 10 'may be mounted in the opposite manner to the above.

Referring to the operation and effect of the subject innovation is configured as follows.

That is, when the wheel moves up and down, the conventional rubber bush 22 and the bush 10, 10 ', as in the prior art, the outer pipe 21 to rotate up and down together with the trailing arm 1 itself. It acts as a rubber spring that suppresses elastic force and acts as a damping action with the strut arm 7 including the coil spring 5 and the shock absorber 6.

When the force of the front and rear direction is transmitted to the wheel 2, the flexibility is absorbed by its own flexibility to satisfy the before and after flexibility required by the rubber bush.

If a lateral force (+) is applied from the outside of the wheel 2 to the inside of the wheel 2 as shown by the arrow of FIG. 4 during driving or braking of the vehicle, the trailing arm 1 will eventually rotate counterclockwise with respect to the fixed part. At this time, the front and rear about the hardness of the bush (10 ') is applied to the bar, as shown in the virtual line, the wheel 2 is slightly pushed to the inner axis and at the same time a slight toe-in state, the steering effect by the wheel It can be reduced to have an excellent straightness.

Contrary to the above, when the lateral force (-) from the inner side to the outer side of the wheel 2 is applied, the steel hardness bush 10 receives this force, but the strength of the wheel 2 depends on the strength of the steel hardness bush 10. Since the position does not change and absorbs the lateral force in the same state as the initial state, the toe of the wheel does not change.

As in the above operation process, the present invention satisfies the flexibility before and after, while increasing the torsional stiffness in the-direction and lowering the torsional rigidity in the + direction, it is possible to control the toe of the rear wheel during braking or turning It is a useful design that can contribute to safe driving by increasing the stability of driving and braking.

Claims (3)

The trailing arm is a means for sandwiching the rubber bush 21 between the inner and outer pipes 20 and 21 fixed to the tip of the trailing arm 1 and fitting the inner pipe 20 to the support shaft S. In fixing (1) to the support shaft (S), a pair of rubber bushes (10, 10 ') having strengths of steel and strength are mounted on both sides of the rubber bush (21), but rubber of the same type Fixing structure of the trailing arm of the vehicle, characterized in that for mounting the bush in the diagonal direction to fix the trailing arm (1) to the vehicle body. The method of claim 1, wherein the steel hardness bush 10 is formed of a semi-circular body 11 having an appropriate length so that the semi-circular groove 12 corresponding to the outer diameter of the inner pipe 20 to be described later is formed in the center of the upper surface of the body The fixed structure of the vehicle trailing arm is formed, characterized in that the circumferential jaw 13 is protruded on the circumference of one side tip. 2. The fixing of the trailing arm of claim 1, wherein the weak hardness bush 10 ′ has the same configuration as the steel hardness bush 10 but is formed by drilling a long hole 14 between the inner diameter portion and the outer diameter portion. rescue.