TORSION BEAM, TORSION BEAM ASSEMBLY AND TORSION BEAM TYPE SUSPENSION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a torsion beam, a torsion beam assembly and a torsion beam type suspension device used as a suspension system of an automobile to suppress metal fatigue.

SOLUTION: This torsion beam type suspension device includes the torsion beam including a pair of right and left arms and oscillatably connected to a vehicle body via a pivot shaft, and a spring for connecting the torsion beam and the vehicle body. The torsion beam connecting the right and left arms has a substantially V-shaped or a substantially U-shaped closed section in which a space between a front end and a rear end in the longitudinal direction of the vehicle body projects into either an upper direction or a lower direction in the cross section orthogonal to a width direction of the vehicle body and includes stress reducing sections 12B and 12C having the closed section asymmetrically formed in the longitudinal direction.

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