| 摘要 |
PROBLEM TO BE SOLVED: To secure both of a vibration control effect for shaft direction input vibration and high spring rigidity in a shaft right angle direction by narrowing or closing a pair of shallow bottom parts of a fluid chamber by each peripheral direction intermediate part and providing a partition wall impeding a peripheral direction flow of incompressible fluid through the shallow bottom parts. SOLUTION: A main rubber elastic body 14 elastically deforms by shaft direction vibration, an internal pressure difference is generated by a difference of elastic deformation amount of each wall part between deep bottom parts 44 and shallow bottom parts 46 within a fluid chamber 58, a fluid flow is generated, flow rate is secured in the shallow bottom parts 46 because the shallow bottom parts 46 are formed on both the sides of a peripheral direction of an interruption wall 54 and a low dynamic spring effect is displayed. The shallow bottom parts 46 add the low dynamic spring effect to a high spring characteristic of thick bottom wall parts 48 themselves which are thick in a shaft direction in opposite radial directions, the thick bottom wall parts 48 are radially made thin by radial projecting parts 24, elastic deformation is restricted and large spring rigidity can be secured. In the deep bottom parts 44, thin bottom wall parts 52 are radially made thin in the opposite radial directions and are mainly sheared and deformed, force of constraint due to the radial projecting parts 24 hardly act and the making the mount into the low dynamic spring can be attained. |
