KR20020051760A - The compound torsion beam axle typed suspension having double cushioned action - Google Patents

Abstract

PURPOSE: A compound torsion beam axle suspension for double buffering is provided to improve buffering and driving experience by increasing lateral rigidity without increasing front and rear stiffness and by driving wheels individually. CONSTITUTION: A buffer spring(S) and a shock absorber(A) are installed in a torsion beam axle(10), and the torsion beam axle is connected to both wheels(W). A couple of trailing arms(11') are installed integrally in the torsion beam axle, and trailing arms are composed of body assembling ends(11a,11a') and sub buffering ends(11b,11b'). Body assembling ends are installed in the vehicle body, and a bush(12) is installed in the body assembling end. A sub bush(13) is formed vertically in the sub buffering end, and the sub buffering end is spaced from the body assembling end. The sub bush consists of an elastic mass, an inner member inserted to the mass, and an outer ring surrounding the mass. Buffering and driving experience are improved with increasing lateral rigidity and driving wheels individually.

Description

Compound torsion beam axle typed suspension having double cushioned action}

The present invention relates to a compound torsion beam axle type suspension having a double buffer function, and more particularly, to a compound torsion beam axle type suspension device having a double buffer function having a buffering effect on a vertically acting rebound stroke. .

In general, the suspension of the vehicle is connected between the axle and the body to properly attenuate vibrations or shocks received from the road surface while driving, thereby improving damage to the body and riding comfort of the occupant. As shown in Fig. 1, the compound torsion beam axle suspension has a torsional pair of protruding trailing arms 11 and 11 'integrally formed with a torsion connecting both wheels W. As shown in FIG. It consists of the beam axle 10, the shock absorbing spring S, and the shock absorber A which were attached to this torsion beam axle 10. As shown in FIG.

Here, the body fastening ends 11a and 11a 'are formed on the trailing arms 11 and 11' of the torsion beam axle 10 so as to be mounted to the vehicle body, while the body fastening ends 11a and 11a 'are formed. Inside the bush 12 is provided with an angle in the horizontal direction.

Accordingly, as shown in FIG. 2, the bumps generated by the impact applied from the road surface when the vehicle is driven and the rebound are absorbed through the elastic force (Ks) of the shock absorbing spring and the buffering force of the shock absorber (A). In addition to absorbing the shock applied through the three-way elastic force (Kx, Ky, Kz) of the bush 12 provided on the body fastening ends (11a, 11a ') of the trailing arms (11, 11') It is buffered to maintain a comfortable ride.

However, in such a compound torsion beam axle type suspension device, the hinge point of the vehicle body has a body fastening end 11a, 11a 'of the trailing arm 11, 11' due to the structure of the torsion beam axle 10. Lateral stiffness is relatively weak compared to other suspensions because the lateral characteristics of the wheels W are difficult to control sufficiently with only the yellow elastic force Ky of the bush 12 when the external force, especially the lateral force, is applied. There are disadvantages.

In order to compensate for the weakness of the lateral stiffness, that is, a lateral stopper is applied to increase the lateral stiffness of the bush 12, the elastic force Kx, which is the front and rear stiffness of the bush 12 made of metal, is also increased. Of course, there is a problem that inhibits.

In addition, when the rebounding external force is simultaneously applied to the left and right wheels (W), the suspension device acts like an integrated left and right axle suspension device. There is a problem.

Accordingly, the present invention has been made in view of the above, and while increasing the lateral stiffness without increasing the front and rear stiffness, while maintaining the independent behavior of the left and right wheels, the cushioning function is increased and the riding comfort is also improved. There is a purpose.

The present invention for achieving the above object, a pair of trailing arms formed integrally with the torsion beam axle of the compound torsion beam axle-type suspension is projected so as to be mounted on the vehicle body and each bush in the horizontal direction therein. Sub-buffer ends are formed so that the provided body fastening end and the sub-bush is provided vertically at intervals to the body fastening ends.

1 is a schematic configuration diagram of a conventional compound torsion beam axle type suspension device

Figure 2 is an operating state diagram schematically showing the buffer effect of Figure 1

3 is a schematic configuration diagram of a compound torsion beam axle type suspension having a double buffering function according to the present invention.

4 is a diagram illustrating a subbush structure of FIG. 3.

5 is a diagram showing an operating state schematically showing a buffering effect of a compound torsion beam axle type suspension having a double buffer function according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: torsion beam axle 11,11 ': trailing arm

11a, 11a ': Body fastening 11b, 11b': Sub-buffered

12: body bush 13: sub-bush

13a: mass 13b: inner member

13c: outer ring

A: Shock absorber S: Shock absorbing spring

W: Wheel

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

Figure 3 is a schematic configuration diagram of a compound torsion beam axle-type suspension having a double buffering function according to the present invention, the present invention is equipped with both wheels while the shock absorber (S) and shock absorber (A) is mounted A pair of trailing arms 11 and 11 'integrally formed on the torsion beam axle 10 connecting the (W) protrudes to be mounted on the vehicle body, and includes bushes 12 in the transverse direction, respectively. Sub fastening ends 11b and 11b 'are formed so that the body fastening ends 11a and 11a' and the subbush 13 may be provided perpendicularly at intervals to the body fastening ends 11a and 11a '.

Here, the sub-bush 13 provided in the sub-buffer ends 11b and 11b 'includes a mass 13a having elastic force and an inner member 13b inserted into the mass 13a. ) And an outer ring 13c surrounding the mass 13a.

Accordingly, as shown in FIG. 5, the bumps generated by the impact applied from the road surface when the vehicle is driven and the rebound are absorbed through the elastic force (Ks) of the shock absorber spring and the buffering force of the shock absorber (A). In addition, the three-way elastic force (Kx, Ky, Kz) and the sub-buffer ends (11b, 11b ') of the bush 12 provided in the body fastening ends (11a, 11a') of the trailing arms (11, 11 ') The shock applied to the three-way elastic force (Kx ', Ky', Kz ') of the sub-bush 13 provided in the medium is absorbed and buffered to maintain a comfortable ride.

Since two lateral elastic forces are generated at the body fastening ends 11a and 11a ', the sub-shock absorbing ends 11b and 11b' are alleviated to have a small stiffness in the lateral elastic forces Ky of the body fastening ends 11a and 11a '. Since it is possible to strengthen the transverse elastic force (Ky ') of the relatively large rigidity, the lateral stiffness of the body fastening ends (11a, 11a') is of course increased.

In addition, when the wheel W moves up and down, the bush 13 and the shock absorbing spring S of the sub-shock stages 11b and 11b 'act as parallel springs to each other, resulting in body fastening ends 11a and 11a'. In addition to the elastic forces Kz and Ks of the up and down stiffness of the shock absorbing spring S, the elastic forces Kz 'of the sub-buffer ends 11b and 11b' are added to alleviate the impact upon rebound, as well as to the left and right sides. As a matter of course, the wheels W are also inverted.

As described above, according to the present invention, the sub-shock stages are formed at the body fastening end of the trailing arm mounted on the vehicle body at predetermined intervals so that the elastic force generated through this is appropriately varied so that the lateral stiffness is increased without increasing the front and rear stiffness. While increasing the left and right wheels of the independent behavior while increasing the cushioning function is also effective to improve the ride comfort.

Claims (2)

A pair of trailing arms (11, 11 ') integrally formed on the torsion beam axle (10) connecting both wheels (W) while the shock absorber (S) and shock absorber (A) are mounted is mounted on the vehicle body. The sub-bush 13 is vertically spaced apart from the body fastening ends 11a and 11a 'having the bushes 12 in the transverse direction and spaced apart from the body fastening ends 11a and 11a'. Compound torsion beam axle-type suspension having a double buffer function, each of which is provided with sub-buffer ends (11b, 11b '). 2. The sub-bush (13) according to claim 1, wherein the sub-bush (13) includes an elastic force (13a), an inner member (13b) inserted into the mass (13a), and an outer ring (13c) surrounding the mass (13a). Compound torsion beam axle type suspension device having a double buffer function.