| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid-sealed vibration isolating device of a new structure capable of effectively preventing abnormal noises and vibrations in cases where negative pressure is made to occur in a pressure chamber, without damaging vibration isolating performance in cases where positive pressure is made to occur in the pressure chamber. SOLUTION: A movable bulkhead member 72, which is harder than a main rubber elastomer 16 and whose specific gravity is smaller than that of a sealed incompressible fluid in the pressure chamber 62, is accommodated in the pressure chamber 62. The peripheral portion of the movable bulkhead member 72 is enabled to contact the inside circumferential surface of the main rubber elastomer 16 constituting the wall surface of the pressure chamber 62 over the entire circumference under a usage condition that the bulkhead member is mounted on a member to be connected for isolating the vibrations. By making the peripheral portion of the movable bulkhead member 72 contact the inside circumferential surface of the main rubber elastomer 16, the pressure chamber 62 is partitioned up and down by the movable bulkhead member 72 and an opening at the pressure chamber 62 side of orifice paths 70 is opened in a region below the movable bulkhead member 72 in the pressure chamber 62. COPYRIGHT: (C)2008,JPO&INPIT |
