Torsion beam axle having ring member friction-welded to trailing arm

Abstract

The present invention relates to a torsion beam axle having a ring member friction-welded to a trailing arm, comprising a torsion beam whose both end parts have a circular cross section and a pair of trailing arms which are integrally coupled to the both end parts of the torsion beam, wherein the trailing arm is formed with a circular joining surface which has at least a predetermined width in a radial direction to correspond to the end part of the torsion beam, and the torsion beam axle further comprises a ring member having axially one end surface which is correspondingly contacted to the circular joining surface and coupled thereto by friction welding, and the other end surface which is correspondingly contacted to the end part of the torsion beam and welded thereto. Therefore, an enhanced coupling force between the trailing arm and the torsion beam which are of different materials therebetween can be maintained.

Description

technical field [0001] The present invention relates to torsion beam axles, and more particularly to torsion beam axles having a ring member disposed between the torsion beam and a trailing arm and friction welded to the trailing arm. Background technique [0002] Torsion beam shaft (see figure 1 10 in ) is the suspension system for supporting the wheels to the chassis and includes multiple trailing arms (see figure 1 11 in ) and torsion beams (see figure 1 12 in ), each trailing arm is respectively connected to the front (rear) side wheels and the chassis, and the torsion beam is connected between the trailing arms. [0003] Such a torsion beam axle correspondingly realizes a torsion beam with torsional characteristics when a torsion occurs between the left and right side wheels. The main technical problem with the torsion beam axle is that it has to ensure good boot space and a competitive price, and has to achieve a low chassis weight by means of an optimized design of...

AI Technical Summary

Problems solved by technology

[0005] Therefore, when the trailing arm and the torsion beam are made of different materials as described above, an important problem arises in the method of joining between the different materials: it must be ensured that the joint strength between the trailing arm and the torsion beam is sufficient for the torsion beam during the manufacturing process. Predetermined load conditions required for type shafts

However, in order to adopt this method, not only is an expensive large-scale device required due to the large size and heavy weight of the torsion beam, but also it is difficult to meet the accuracy of the joint position.

Therefore, friction welding is not considered as a suitable alternative

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