Patent ID: 7070175

Claim:
An anti-vibration device comprising a first fitting having a mounting end piece, a second fitting, a vibration isolating base connecting the first fitting and the second fitting and made of a rubber-like elastomer, and a fixed plate member fixed to the mounting end piece of the first fitting protruding from the vibration isolating base, wherein the mounting end piece includes a receiving surface portion for receiving thereon one plate surface of the fixed plate member and a projecting portion protruding from the receiving surface portion, the fixed plate member having a mounting hole, through which to insert the projecting portion of the mounting end piece; the projecting portion of the mounting end piece is constructed so that the projecting portion is inserted in the mounting hole of the fixed plate member thereby to receive the one plate surface of the fixed plate member on the receiving surface portion of the mounting end piece and concurrently, part of the projecting portion protruding from the mounting hole is upset and configured such that a peripheral wall, in longitudinal cross-section, of the projecting portion assumes such an arc profile that a projecting end surface side of the peripheral wall is located more radially outwardly and a marginal area of the projecting end surface on the peripheral wall side assumes a convex spherical form in the projecting direction, and so that the projecting portion of the mounting end piece fixed to the fixed plate member is not in pressure contact with the other plate surface of the fixed plate member, the external peripheral surface of the projecting portion between the receiving surface portion of the mounting end piece and said other plate surface of the fixed plate member is formed as a surface with no angular portion in its longitudinal cross-section, and the internal peripheral surface of the mounting hole of the fixed plate member is formed as a surface with no angular portion in its longitudinal cross-section, and a circular edge portion formed by said other plate surface of the fixed plate member extending in a direction perpendicular to the axial direction of the mounting hole and an internal peripheral surface of the mounting hole extending in the axial direction of the mounting hole is received in the axial direction of the mounting hole by the projecting portion of the mounting end piece with an arc shape in longitudinal cross-section.