| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid sealing vibration isolation device which can selectively and effectively obtain vibration isolation effect due to a first, second, and third orifice passages respectively tuned to low, medium, and high frequency areas, by a simple valve changeover mechanism. SOLUTION: A first orifice passage 30 tuned in a low frequency area and a second orifice passage 82 tuned to a medium frequency area are arranged between a pressure receiving chamber 74 and a balance chamber 76. Communication of the passages is selectively switched by a valve means 92. A movable member 108 is arranged on the way of the first orifice passage 80. A third orifice passage 100 tuned in a high frequency area is formed between the movable member 108 arranged part on the first orifice passage 80 and the pressure receiving chamber 74. |
