| 摘要 |
PURPOSE:To secure sufficient space for the disposition of a mass member by omitting an elastic thin film member so as to simplify structure at the time of making the mass member large-sized and to increase the setting freedom of resonance frequency of the mass member. CONSTITUTION:A first fitting member 3 on the upper side and a second fitting member 4 on the lower side are connected to each other by an elastic support body 5, and a fluid chamber 6 is partitioned by the elastic support body 5 and the first fitting member 3. The fluid chamber 6 is partitioned into a pressure receiving chamber 11 and a balance chamber 10 by a partition body 9 elastically supported by an elastic support member 13, and both chambers 11, 10 are communicated with each other by an orifice 12. Liquid is filled in such a way that the pressure receiving chamber 11 and the orifice 12 are filled with this liquid and that the liquid level is positioned above the balance chamber side opening of the orifice 12, thus forming a liquid chamber part 10a at the lower half part of the ballance chamber 10. An air chamber 10b is formed at the upper half part of the balance chamber 10 to secure the flow of liquid between both chambers, and then an elastic thin film member can be omitted. A mass member 14 is fitted to the upper face of the partition body 9 and disposed in the balance chamber 10 in such a way as to be relatively displaced along with the partition body 9. |
