Patent ID: 7648129
Filing Date: 2010-01-19
Classification: F16F

Abstract:
1. A fluid filled vibration damping device comprising: a first mounting member; a second mounting member of tubular shape and being positioned with a first axial open end thereof oriented toward the first mounting member; a main rubber elastic body elastically connecting the first mounting member and the second mounting member so that the first axial open end of the second mounting member is fluid-tightly closed by means of the rubber elastic body; a partition member disposed fitting within and supported fixedly at an axial medial portion of the second mounting member forming between the main rubber elastic body and the partition member a primary fluid chamber whose wall is partially defined by the main rubber elastic body, and being filled with a non-compressible fluid, the partition member being furnished with a recess that opens onto a side thereof opposite from the primary fluid chamber; a rubber elastic plate covering an opening of the recess so as to form an auxiliary fluid chamber whose wall is partially defined by the rubber elastic plate, and being filled with the non-compressible fluid; a fluid flow passage permitting a fluid communication between the primary fluid chamber and the auxiliary fluid chamber; a fastening member superposed against an axial end of the partition member where the opening of the recess is situated, the fastening member being fitted into the second mounting member together with the partition member, and secured fitting therein by means of diameter constriction of the second mounting member; and a working air chamber being formed by means of cooperation between the rubber elastic plate and the fastening member, and being situated to an opposite side of the rubber elastic plate from the auxiliary fluid chamber; an annular mounting fitting affixed to an outside peripheral edge of the rubber elastic plate, and having a flange portion flaring diametrically outward at one axial end thereof such that a maximum outside diameter dimension of the annular mounting fitting inclusive of the flange portion is smaller than an inside diameter dimension of the recess of the partition member, while another axial end of the mounting fitting extends radially inwardly toward the rubber elastic plate; a seal rubber projection disposed on the one axial end of the mounting fitting so as to project axially outward from the flange portion; a seal rubber layer formed covering an inside peripheral face of the other axial end of the mounting fitting; and a mating projection portion formed on the fastening member so as to project towards the recess of the partition member, wherein the other axial end of the mounting fitting is fastened externally and fluid-tightly onto the mating projection portion with the seal rubber layer sandwiched therebetween and the mounting fitting is inserted into the recess of the partition member, wherein with the seal rubber projection projected from the one axial end of the mounting fitting pressed fluid-tightly in an axial direction against the partition member around an entire circumference, and with a gap formed in a diametrical direction between an inside face of the recess of the partition member and the flange portion of the mounting fitting as well as the seal rubber projection, the partition member and the fastening member are fastened fitting together with the second mounting member.