The present invention is the spring constant value is improved so that the structure variable in a non-linear torsion vehicle depending on the vehicle weight relates to a bar spring member , the structure is a marked down the torsion bar splines on the outer surface of the end portion is provided with a spline portion formed in the lateral direction , so that the inner circumferential surface on the spline coupling portion with which the hollow cylindrical portion is formed having a concave-convex in the cylinder both outer rim section is divided into a plurality of outwardly extending pipe members each formed from a fixed side . ; according to the present invention is proportionally according to the vehicle weight increases the value of a variable spring constant , so comfort is increased not only be improved , and an effect of improving driving stability is also useful .
展开▼
