| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a fluid sealed vibration isolation device of a novel structure which can particularly effectively obtain vibration isolation performance by devices which are different in middle-frequency middle-magnitude vibration and high-frequency small-magnitude vibration, respectively, while sufficiently securing the vibration isolation performance against low-frequency large-magnitude vibration.SOLUTION: In a fluid sealed vibration isolation device 10, a rubber elastic membrane 56 having a thin-thickness portion 62 and a heavy-thickness portion 64 is assembled to a partitioning member 40, a movable rubber membrane is constituted at the thin-thickness portion 62, and stopper parts 80, 82 for limiting an elastic deformation amount of the movable rubber membrane are arranged at the partitioning member 40. On the other hand, magnitude-dependence type valve means in which a communication passage 86 is formed at the heavy-thickness portion 64, and an elastic protrusive piece 94 is integrally formed at the communication passage 86 and blocks the communication passage 86 by being elastically deformed is constituted, and furthermore, positioning means of the circumferential direction of the rubber elastic membrane 56 with respect to the partitioning member 40 is constituted.</p> |
