| 摘要 |
PURPOSE:To achieve a good damping effect in a large frequency range to inputted vibration in the axial direction and obtain a good static spring property in the diametric direction by providing a narrow part forming member separating a fluid chamber into two in the axial direction and a pair of throughholes penetrating in the axial direction. CONSTITUTION:If an axial vibration is inputted between an inner cylinder and an outer cylinder member 10, 12, a narrow part forming member 46 disposed in the inner cylinder member 10 is relatively moved axially to the outer cylinder member 12, and a sliding shear is applied effectively to high viscosity fluid in a narrow part at least either between a pair of connecting parts between the narrow part forming member 46 and a rubber resilient member 14 or between the narrow part forming member 46 and the outer cylinder member 12, where a good damping effect is achieved regardless of frequencies of the inputted vibration based on it. In the meanwhile, because a pair of throughhole 54 are provided axially in connecting parts 22 symmetrically provided at the outer circumference of the resilient member 14, a low static spring constant can be obtained in the opposite direction of the connecting parts 22. |
