FLUID SEALING TYPE DAMPING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a new-structure fluid sealing type damping device capable of avoiding the generation of vibration and abnormal sound by quickly eliminating a negative pressure generated in a pressure receiving chamber in inputting a shocking large load vibration. SOLUTION: This fluid sealing type damping device is formed with a shortcircuit passage short-circuiting an orifice passage 58 mutually communicating a pressure receiving chamber 54 having one part of the wall part constituted of a body rubber elastic body 16 and a equilibrium chamber 56 having one part of the wall part constituted of a flexible film 48. This device is also provided with valve means 40 short-circuiting the shortcircuit passage, communicating the shortcircuit passage only when the negative pressure larger than a preset negative pressure is generated in the pressure receiving chamber 54, and short-circuiting the orifice passage 58.