FLUID SEALED-IN VIBRATION ISOLATOR

摘要

PURPOSE:To reduce the noise due to engine vibration by forming at least three liquid chambers in the interior of a rubber body inserted between a shaft member and an outer cylinder member. CONSTITUTION:A rubber member 3 is inserted between a shaft member 1 and an outer cylinder member 2 surrounding the shaft member. The first liquid chamber 7, the second liquid chamber 8 and the third liquid chamber 9 are formed in the interior of the rubber body 3. The first liquid chamber 7 and the second liquid chamber 8 are communicated with each other by the first orifice passage 13 and the first liquid chamber 7 and the third liquid chamber 9 are communicated with each other by the second orifice passage 14 to form two vibration systems. A partition wall 19 is formed to be comparatively thin, a partition wall 21 is formed to be thin and a partition wall 22 is formed to be thick to set the spreader spring constants of the liquid chambers 8, 9 to different values. Thus, the high-frequency vibration can be interrupted further effectively so that the noise due to engine vibration can be reduced.