Patent ID: 11951795
Assignee: SUMITOMO RIKO COMPANY LIMITED
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A suspension bush, comprising:
an inner shaft member;
an outer tube member, connected with the inner shaft member in a radial direction by a main body rubber elastic body; and
an intermediate member, arranged between the inner shaft member and the outer tube member in the radial direction and fixed to the main body rubber elastic body,
wherein the inner shaft member comprises an inner bulging portion located at a central portion in an axial direction and having an outer surface shape that is convex toward an outer periphery of the inner shaft member, the outer tube member comprises an outer curved portion located at the central portion in the axial direction and having a curved cross-sectional shape that is concave toward an inner periphery of the outer tube member, and the intermediate member comprises an intermediate curved portion located at the central portion in the axial direction and having a curved cross-sectional shape that is concave toward an inner periphery of the intermediate member;
the main body rubber elastic body is pre-compressed by diameter reduction of the outer tube member, an inclination angle of both axial end parts of the outer curved portion with respect to the axial direction is increased by diameter reduction of the outer tube member, and both axial end parts of the outer curved portion are pressed against axial end portions of the main body rubber elastic body, and
a radial thickness dimension of an inner layer rubber in the main body rubber elastic body that is arranged closer to an inner peripheral side than the intermediate member is larger than a radial thickness dimension of an outer layer rubber in the main body rubber elastic body that is arranged closer to an outer peripheral side than the intermediate member at the central portion in the axial direction.