Fluid-filled type vibration damping device and manufacturing method thereof

摘要

A fluid-filled type vibration damping device including a base component and a tubular mating component. The tubular mating component is externally fitted onto the base component by means of a diameter-constricting caulking with a sealing rubber clasped therebetween so as to constitute a mate-fastened portion. The tubular mating component extends axially outward beyond a sealed section of the mate-fastened portion so as to provide a caulking tube portion. A diametrical position of the tubular mating component at the sealed section is determined by contact of the caulking tube portion against an outside peripheral face of a positioning projection provided on the base component so as to define a diametrical positioning portion. The caulking tube portion is constricted in diameter and held in engagement with an axial edge portion of the positioning projection so as to form an axial positioning portion.

主权项

1. A fluid-filled type vibration damping device comprising:
a first mounting member; a second mounting member including a base component and a tubular mating component; a main rubber elastic body connecting the first mounting member and the second mounting member; a fluid chamber filled with a non-compressible fluid and adapted to receive input of vibration; a mate-fastened portion constituted by externally fitting the tubular mating component onto an outer circumferential face of the base component by means of a diameter-constricting caulking with a sealing rubber clasped therebetween; a caulking tube portion that is provided at a portion of the tubular mating component extending outward in an axial direction beyond a sealed section of the mate-fastened portion sealed by the sealing rubber; and at least one positioning projection provided on the base component at a section where the caulking tube portion is externally fitted, wherein a diametrical position of the tubular mating component at the sealed section is determined by contact of the caulking tube portion against an outside peripheral face of the positioning projection so as to define a diametrical positioning portion; wherein the caulking tube portion is constricted in diameter and held in engagement with at least one axial edge portion of the positioning projection so as to form an axial positioning portion; and wherein the sealing rubber axially extends along an inner surface of the tubular mating component, and wherein the sealing rubber is compressed between the sealed section of the tubular mating component and the base component, and an axial end face of the sealing rubber is pressed on an axial upper face of the positioning projection.