| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid-filled vibration isolation device of a new structure capable of advantageously securing durability of a movable rubber film provided with a short circuit slit for eliminating negative pressure while effectively materializing target vibration isolation performance. SOLUTION: In this vibration isolation device, a liquid pressure absorbing mechanism having the movable rubber film 64 fixedly supported at an outer circumference part thereof by a partition member 44 assembled to the partition member 44, and having pressure of a pressure receiving chamber 78 applied on one surface of the movable rubber film 64 and pressure of the balance chamber 80 applied on another surface, and absorbing pressure fluctuation in the pressure receiving chamber 78 by elastic deformation of the movable rubber film 64 based on differential pressure between the pressure receiving chamber 78 and the balance chamber 80 is constructed, at least one slit 72 is formed on the movable rubber film 64, the slit 72 is retained in a closed state by elasticity of the movable rubber film 64, and a reinforcement protrusion 76 projecting toward a thickness direction both sides of the movable rubber film 65 at is formed at an outside of each end part of the slit 72. COPYRIGHT: (C)2009,JPO&INPIT |
