| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration isolation device which can suppress the generation of cavitation while maintaining vibration isolation characteristics.SOLUTION: A movable plate 18 accommodated in a partitioning member 15 for partitioning a liquid chamber 16 of a first attachment member 11 into a main liquid chamber 16a and a sub-liquid chamber 16b is formed so as be easily deformed toward the main liquid chamber 16a, and at the side of the sub-liquid chamber 16b of the movable plate 16, there is arranged a closing part 25 having a penetration hole 19, and closing the penetration hole 19 by being brought into contact with the movable plate 18. When positive pressure is generated at the main liquid chamber 16, the movable plate 18 is pressed against the closing part 25 and closes the penetration hole 19, and the high-pressure liquefaction of the main liquid chamber 16a becomes possible. When the liquid pressure of the main liquid chamber 16a is lowered, the movable plate 18 is deformed toward the side of the main liquid chamber 16a, and suppresses the lowering of the liquid pressure in the main liquid chamber 16a; a flow of liquid to the main liquid chamber 16a from the sub-liquid chamber 16b is permitted by the penetration hole 19; the lowering of the liquid pressure of the main liquid chamber 16a is suppressed; and the generation of the cavitation is suppressed. |
