Semi-independent suspension frame for rear torsion beam of automobile

Abstract

The invention discloses a semi-independent suspension frame for a rear torsion beam of an automobile. The semi-independent suspension frame is beneficial to the preventing for the crack generation caused by ultra-high stress values of welding areas of longitudinal arms and a cross beam. The semi-independent suspension frame for the rear torsion beam of the automobile comprises the cross beam with a V-shaped or U-shaped cross section and the longitudinal arms connected with the two ends of the cross beam; a spring base is arranged on the longitudinal arms; reinforcing parts are arranged at the joints of the cross beam and the longitudinal arms; each of the reinforcing parts comprises a cross beam connecting part and a longitudinal arm connecting part; the cross beam connecting part is connected with the upper surface of the cross beam; the shape of the cross section of the cross beam connecting part is matched with that of the cross beam; the longitudinal arm connecting part is connected with one of the longitudinal arms; the shape of the cross section of the longitudinal arm connecting part is matched with that of the longitudinal arms; and two ends of the longitudinal arm connecting part are respectively located on the two sides of the cross beam connecting part along the longitudinal arms. A test proves that the semi-independent suspension frame for the rear torsion beam of the automobile can effectively transfer the stress onto the reinforcing parts, so that the stress values of the welding areas of the longitudinal arms and the cross beam are reduced, but the stress on the reinforcing parts is still less than a yield limit, thereby preventing the crack generation and the happening of failure state.

Description

technical field [0001] The invention relates to an automobile rear torsion beam semi-independent suspension applied in the field of automobile manufacturing. Background technique [0002] In the prior art, the beam-type semi-independent suspension includes an integral beam with a V-shaped or U-shaped cross-section, and left and right longitudinal arms are respectively welded at both ends of the beam. The spring seat is welded on the trailing arm. The crossbeam is a key part of the crossbeam semi-independent suspension, which plays the role of force transmission, force bearing and connection on both sides of the balance. When the deformation on both sides is unequal, the beam undergoes torsional deformation. The welding area between the longitudinal arm and the cross beam and the welding area between the spring seat and the cross beam are the parts of special attention. Due to the excessive stress value in the above areas, the cross beam may crack and fail in this area. ...

AI Technical Summary

Problems solved by technology

Experiments have proved that although the reinforcement of the above structure can increase the connection strength between the beam and the longitudinal arm, its increasing effect is limited, and the stress value at the connection between the beam and the longitudinal arm is still relatively large

And the reinforcement itself is easy to break due to external force

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