Manufacturing method for upper support and upper support

摘要

When manufacturing an upper support which includes a cup piece as an inner piece, an outer piece, and a rubber elastic body integrally vulcanize adhered thereto, the shape of a tubular portion of a cup piece before integral vulcanized adhesion with the rubber elastic body is a shape having a large diameter portion at a top portion continuous with a flanged portion, a small diameter portion at a bottom portion, and a stepped portion therebetween. Following integral vulcanized adhesion with the rubber elastic body, only the small diameter portion is diameter widened by press-fitting a diameter widening jig to impart pre-compression to the rubber elastic body. No roll-back deformation of a flanged portion occurs when integrally vulcanize adhering the cup piece to the rubber elastic body, and also when imparting pre-compression to the rubber elastic body by diameter widening a tubular portion of the cup piece.

主权项

1. A manufacturing method for an upper support wherein:
the upper support comprises (a) a cup piece forming an inner piece, (b) an outer piece disposed around the inner piece in a position offset in a radial direction, and (c) a rubber elastic body integrally vulcanize adhered to the inner piece and the outer piece in a state where the inner piece and the outer piece are elastically connected to the rubber elastic body; and the upper support is anchored to a piston rod for a shock absorber on an inner piece side, and the upper support is anchored to a vehicle body on an outer piece side, the upper support elastically connecting the piston rod and the vehicle body and acting to prevent vibration; the manufacturing method for the upper support comprising:
integrally vulcanize adhering the cup piece directly to the rubber elastic body, the cup piece including:
a tubular portion;a base portion having a piston rod insertion hole in a center of a bottom end of the tubular portion; anda flanged portion jutting in a radially outward direction at a top end of the tubular portion on a side opposite to the base portion,providing the cup piece such that the shape of the tubular portion prior to integral vulcanized adhesion with the rubber elastic body is a shape comprising:
an upper portion continuous with the flanged portion as a large diameter portion;a lower portion on the base portion as a small diameter portion; anda portion between the large diameter portion and the small diameter portion as a stepped portion,andfollowing the integral vulcanized adhesion with the rubber elastic body, diameter widening the small diameter portion by press-fitting a diameter widening jig into the small diameter portion to impart pre-compression to a portion of the rubber elastic body corresponding to the small diameter portion while diameter widening is not performed on the large diameter portion, which retains its dimensions and shape.