| 摘要 |
PROBLEM TO BE SOLVED: To comparatively reduce rigidity of a horizontal direction while sufficiently ensuring rigidity of a vertical direction, and improve a damping effect. SOLUTION: A sideways inner cylindrical body 1 and an external cylindrical body 2 are connected to each other through a rubber elastic body 3, a main fluid chamber 5 is arranged on a position lower than the inner cylindrical body 1, and an auxiliary fluid chamber 6 is arranged on a position upper than the inner cylindrical body 1. The main fluid chamber 5 and the auxiliary fluid chamber 6 are communicated with each other through orifices 7, 8, and a fluid is sealed into the main fluid chamber 5 and the auxiliary fluid chamber 6. Thin wall thickness parts 33a are formed in a curving shape projected toward the main fluid chamber side in a right side region of a projection region R projected downward in a perpendicular direction of the inner cylindrical body 1 of a pair of side wall parts 33 for partitioning cylinder shaft direction both side surfaces of the main fluid chamber 5. The thickness of the projection region is a comparatively thick in a vertical direction so as to ensure sufficient rigidity, and the rigidity is reduced by a thin wall part in a horizontal direction. The thin wall part is formed by curving toward the main fluid chamber side. As a result, in the case where the inner cylindrical body 1 is relatively displaced downward to the outer cylindrical body 2, each side wall part is deflected toward the main fluid chamber 5, the capacity of the main fluid chamber 5 is contracted. It is thus possible to surely supply the liquid in the main fluid chamber 5 into the auxiliary fluid chamber 6 bypassing the orifices 7, 8, and it is also possible to improve a damping effect. |
