Patent ID: 7845624
Filing Date: 2010-12-07
Classification: F16F

Abstract:
1. A cylindrical fluid-filled elastic mount, comprising: a center shaft member; a metal sleeve disposed radially outwardly of said center shaft member with a predetermined radial distance therebetween, which has a plurality of windows passed through a cylindrical wall thereof; an elastic body interposed between said center shaft member and said metal sleeve for elastic connection therebetween, which has a plurality of pockets being open in an outer circumferential surface of said metal sleeve through the corresponding windows thereof; a communication groove-forming elastic member disposed on said outer circumferential surface of said metal sleeve, which has a communication groove so that two said pockets to be connected, of said plurality of pockets, communicate therebetween in the circumferential direction so as to be open in said outer circumferential surface; an orifice member provided with an orifice groove at an outer surface thereof, which has a trough-form protrusion in which at least both-side wall portions provided at an end of said orifice groove are formed by an elastic material, and said trough-form protrusion being inserted in said communication groove so as to be fixed to said communication groove; and an outer cylindrical member fitted on said metal sleeve and fixed by decreasing the diameter to close at least said plurality of windows and said orifice groove, and defining a plurality of fluid chambers filled with a non-compressible fluid corresponding to said pockets and an orifice passage corresponding to said orifice groove, wherein at least one hollow groove is provided in a portion of said communication groove-forming elastic member, the at least one hollow groove is positioned at one side of said communication groove into which said trough-form protrusion provided in an end portion of said orifice groove of said orifice member is inserted, and the at least one hollow groove extends in the circumferential direction alongside said communication groove to prevent deformation of said side wall portions provided at the end of said orifice groove.