| 摘要 |
PROBLEM TO BE SOLVED: To extend a range of frequency of reducible vibration. SOLUTION: An intermediate cylinder 22 and an intermediate block 24 are arranged in the inside of an outside cylinder fitting 16, a space sectioned by the intermediate block 24 and an elastic body 28 constitutes a main liquid chamber 30, and the main liquid chamber 30 and a first auxiliary liquid chamber 32 are communicated to each other by a shake orifice 64 and an idle orifice 60. The main liquid chamber 30 and a second auxiliary liquid chamber 96 are communicated to each other by an orifice 62 for booming, and the idle orifice 60 and the orifice 62 for booming are opened and closed by a rotary valve 36. At this time, an opening part 38 to pass through inside and outside is formed on a cylinder part 36A of the rotary valve 36 in size along a bottom surface which is an end surface on the lower side from an outer peripheral surface of the cylinder part 36A. |
