Vibration-damping bushing with sliding surface on insert located between

Abstract

The vibration-damping bushing is provided having an outer cylinder and an inner cylinder which are coaxially arranged with each other. A ring-shaped insert which is made of a resin material having good slidability is inserted between the outer cylinder and the inner cylinder so that the inner peripheral surface of the insert is closely disposed to the outer peripheral surface of the inner cylinder. A pair of ring-shaped vibration-damping rubber members are press-fitted between the outer cylinder and the inner cylinder on both sides of the ring-shaped insert with metallic sleeves joined to the inner and outer peripheral surfaces of said ring-shaped vibration-damping rubber members, respectively. The inside axial end of the inner peripheral surface of each vibration-damping rubber member is spaced apart from each axial end surface of the insert by a predetermined distance. Upon input of the vibrations in the direction perpendicular to the axial direction, the inner cylinder comes into pressed contact with the insert, thereby sufficiently increasing the rigidity of the vibration damping bushing. Upon the input of the vibrations in the axial direction of the bushing, the inner cylinder freely slides relative to the insert, thereby decreasing the spring force of the vibration-damping bushing, and accordingly effecting good cushioning properties.