Antivibration device

Abstract

A toe correction bushing ( 1 ) is composed of a main body ( 2 ) and a stopper member ( 3 ), wherein the main body ( 2 ) is integrally provided with an inner cylinder ( 4 ), an outer cylinder ( 5 ), and an elastic body ( 6 ). The outer cylinder ( 5 ) is provided at part of the axial end with an outwardly opening inclined section ( 7 ). A recessed space ( 8 ) is provided inside of the inclined section ( 7 ). The stopper member ( 3 ) is provided with a circular plate section ( 20 ) and a stopper projection ( 23 ) at the peripheral section thereof. A boss ( 21 ) provided at the central section of the stopper member ( 3 ) is press-fitted into one end of the inner cylinder ( 4 ) for integration and at the same time, the stopper projection ( 23 ) is caused to engage the recessed space ( 8 ). When a lateral force F to the right is applied to the outer cylinder ( 5 ), the axial movement of the outer cylinder ( 5 ) is controlled by the stopper projection ( 23 ) and displaced in the direction perpendicular to the axis by an inclined plane ( 24 ) for toe correction. It is possible to change characteristics of the toe correction by changing the material, shape or the like of the stopper projection ( 23 )

1 . An antivibration device comprising an inner cylinder, an outer cylinder disposed outside the inner cylinder for engagement, an elastic body provided between the two cylinders, and a stopper member adapted to control the axial movement of one of the two cylinders when receiving external force and displace it in the direction perpendicular to the axis, wherein the stopper member is separately provided from the two cylinders and the elastic body and secured to the axial end of the inner cylinder.  
   
   
       2 . The antivibration device according to  claim 1 , wherein the outer cylinder is provided at part of the axial end with an outwardly opening inclined section, and the stopper member is provided with a stopper projection adapted to engage the inner space of the inclined section.  
   
   
       3 . An antivibration device comprising an inner cylinder, an outer cylinder provided outside the inner cylinder for engagement, an elastic body disposed between the inner and outer cylinders, and a displacement control means for displacing an input to the direction perpendicular to the axis when one of the two cylinders receives the input in the axial direction, wherein an intermediate ring is integrally embedded in the elastic body between the two cylinders and is provided with an inward projecting section, which projects to the inner cylinder side, for serving as the displacement control means, and a recessed section is provided in a position of the elastic body opposite to the intermediate ring relative to the axis in a cross-section of the inner cylinder in the axial direction.  
   
   
       4 . The antivibration device according to  claim 1 , wherein the inward projecting section is integrally formed with the intermediate ring, or is formed as a separate body to be mounted on the intermediate ring for integration.  
   
   
       5 . The antivibration device according to  claim 1  or  claim 2 , wherein the inner cylinder is provided with an outward projecting section facing and some distance from the inward projecting section in the axial direction of the inner cylinder, and part of the elastic body is provided between the inward projecting section and the outward projecting section.  
   
   
       6 . The antivibration device according to one of claims  1  through  3 , wherein the inward projecting section and the recessed section, or these and the outward projecting section are provided right and left to be symmetrical in a cross-section of inner cylinder in the axial direction with respect to a point on the axis.