Damping stopper

Abstract

A damping stopper is interposed between two members axially displaced relative to each other and is provided with an elastic body which, when the interval between the two members decreases, is axially compressed by the two members and expands radially outward. In the elastic body, a second member suppressing the expansion is located in one axial region and attached to the outer periphery. When axially compressed by the two members, the elastic body expands while receiving resistance by the second member. The expanding elastic body contacts the side wall of one of the two members.

1 . A damping stopper comprising:
 an elastic body provided between two members axially displaced relative to each other, the elastic body being configured to be axially compressed by the two members and to radially outward when an interval between the two members decreases; and   a second member attached to an outer periphery of the elastic body in one axial region of the elastic body, the second member being configured to suppress expansion of the elastic body in the one region,   wherein the elastic body expands while receiving resistance by the second member to contact a side wall provided in one member of the two members.   
     
     
         2 . The damping stopper according to  claim 1 , wherein
 the second member is a ring body having rigidity such that the second member does not contact the side wall when the elastic body expanding radially outward contacts the side wall.   
     
     
         3 . The damping stopper according to  claim 2 , wherein
 the ring body has a shape in which a dimension in a direction orthogonal to an axis is larger than an axial dimension.   
     
     
         4 . The damping stopper according to  claim 3 , wherein
 the ring body is assembled to an annular mounting groove provided in the elastic body.   
     
     
         5 . The damping stopper according to  claim 2 , wherein
 the ring body is attached to a position where the elastic body is divided into a portion having a long axial length and a portion having a short axial length.   
     
     
         6 . The damping stopper according to  claim 1 , wherein
 the second member has elasticity such that the second member expands radially outward when pressed by the elastic body expanding radially outward and rigidity higher than rigidity of the elastic body such that the second member contacts the side wall earlier than the elastic body.   
     
     
         7 . The damping stopper according to  claim 6 , wherein
 the second member is a ring body.   
     
     
         8 . The damping stopper according to  claim 3 , wherein
 the ring body is attached to a position where the elastic body is divided into a portion having a long axial length and a portion having a short axial length.   
     
     
         9 . The damping stopper according to  claim 4 , wherein
 the ring body is attached to a position where the elastic body is divided into a portion having a long axial length and a portion having a short axial length.