Importance

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Abstract

A torsion beam suspension is provided in which an open end face at the rear end of a trailing arm is butt-welded to a spindle support plate, wherein a front bent flange (13F) is provided integrally with a front end part of a plate main body (13M) of the spindle support plate (13), the front bent flange (13F) extending forward along an outer face of a rear end part of the trailing arm (10) and having its front edge welded (w3) to the outer face of the rear end part, and a rear bent flange (13R) is provided integrally with a rear end part of the plate main body (13M), the rear bent flange (13R) engaging with and being welded (w4) to a rear edge part of the trailing arm (10), a spindle base plate (14b) being superimposed on and secured (w2) to an outer face of the plate main body (13M) and comprising four threaded hole portions (Sfu, Sfd, Sru, Srd) for bolting a brake related plate-shaped component (P) to the spindle base plate (14b), the four threaded hole portions (Sfu, Sfd, Sru, Srd) being at front, rear, upper, and lower positions with the spindle axis interposed therebetween. This enables the spindle support plate to be made thin while suppressing the influence of thermal distortion from welding, thus achieving light weight and a low cost.

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First Claim