| 摘要 |
PROBLEM TO BE SOLVED: To improve riding comfort by improving rigidity in the axial perpendicular direction, improving steering stability, and decreasing rigidity in the twisting direction. SOLUTION: The whole outer periphery in the axial central part of an inner cylinder 1 is outward expanded, and an expansion part 11 having the spherical shape having the center on the axis or near the inner cylinder 1 or the shape approximately similar to the sphere is formed. A cylindrical inter ring 4 is concentrically installed in the approximately intermediate position between the inner cylinder 1 and an outer cylinder 2, and the axial central part 41 of the inter ring 4 is bent into the shape extending along the expansion part 11. A first vibrationproof rubber body 31 is joined between the inter ring 4 and the inner cylinder 1, a second vibrationproof rubber body 32 is joined between the inter ring 4 and the outer cylinder 2, both ends in the axial direction of the first and second vibrationproof rubber bodies 31, 32 are annularly recessed, and recessed parts 31a, 32a, 31b, 32b whose tips extend to the upper part of the expansion part 11 are provided. |
