| 摘要 |
PROBLEM TO BE SOLVED: To effectively absorb a vibration with a specified frequency by vibrating a movable plate disposed in a partition member partitioning a main liquid chamber from an auxiliary liquid chamber when the vibration with the specified frequency is inputted and prevent an abnormal noise produced by the contact of the movable plate with the partition member from occurring. SOLUTION: In this vibration damper 10, a dimple part 98 is formed in the front surface part and the rear surface part of the movable plate 94, and the dimple parts 98 are disposed on the inner peripheral side of the outer peripheral end part of the movable plate 94. By this, clearances are partially formed between the front and rear surfaces of the movable plate 94, the bottom plate part 90, and the top plate part 78 by the dimple part 98 when the movable plate 94 is vertically deformed in a storage chamber 80 when the vibration is inputted and the movable plate 94 repeatedly abuts on (collides with) the bottom plate part 90 of the partition member 48 and the top plate part 78 of a partition fitting 50. Thus, the sound pressure of a hitting sound produced by the impact of the movable plate 94 against the bottom plate part 90 and the top plate part 78 can be reduced. COPYRIGHT: (C)2006,JPO&NCIPI |
