SHAFT SPRING DEVICE

PROBLEM TO BE SOLVED: To provide a further improved shaft spring device having improved durability by reducing the possibility of crack or creep in elastic layers without increasing the number of components while developing good ride comfort and rock reducing effects independently of a variation of an on-spring weight which is varied. SOLUTION: The shaft spring device comprises an elastic part 3 formed by alternately building up intermediate hard cylinders 7 and the elastic layers 8 in radial inside and outside directions in the condition that they are concentric with an axis P, and mounted between a main shaft 1 and an outer cylinder 2 having the same axis P as the main shaft. The elastic part 3 has the plurality of intermediate hard cylinders 7, and a displacement difference abutting mechanism B for an outer cylinder side member 9 fixed to the outer cylinder 2 and the plurality of intermediate hard cylinders 7 to abut on each other in sequence from the intermediate hard cylinder 7 on the radial outside as a load in the direction of the axis P is increased. COPYRIGHT: (C)2009,JPO&INPIT