Patent ID: 6722481
Filing Date: 2004-04-20
Classification: F16F

Abstract:
A vibration-damping device for damping vibrations excited in a vibrative member, comprising:a housing member adapted to be fixed to the vibrative member and defining an accommodation space therein; a pillar-shaped mass member housed within said accommodation space of said housing member with a slight spacing therebetween so that said pillar-shaped mass member is independent of said housing member and is freely displaceable within said accommodation space of said housing member to come into impact on said housing member, said pillar-shaped mass member extending in a primary vibration input direction; and a rubber buffer and an abutting rubber member, which are integrally formed with each other and fixed to at least one of axially opposite end portions of said pillar-shaped mass member such that said rubber buffer covers an outer circumferential surface of said at least one of axially opposite end portions of said pillar-shaped mass member, and said abutting rubber member extends axially outwardly from said rubber buffer so that said abutting rubber member is disposed over an end face of said at least one of axially opposite end portions of said pillar-shaped mass member, and said pillar-shaped mass member comes into impact at a protruding end portion of said abutting rubber member on said housing member, wherein a void is formed between said abutting rubber member and said at least one of axially opposite end portions of said pillar-shaped mass member so that said abutting rubber member undergoes shear deformation upon an impact of said pillar-shaped mass member on said housing member at said protruding end portion of said abutting rubber member.