| 摘要 |
PURPOSE:To attenuate the inputted vibration through an orifice by sealing the fluid and the gas in a balance chamber forming upper part than a partitioning body of a fluid chamber which is demarcated on the upper side of an elastic supporting body. CONSTITUTION:A fluid chamber 6 is partitioned by a partitioning body 9 into a balance chamber 10 on the upper side and a pressure receiving chamber 11 on the lower side. An orifice 12 communicating the balance chamber 10 and the pressure receiving chamber 11 with each other are formed in the center part of the partitioning body 9 in a straightly extending and piercing manner in the vertical direction. In the fluid chamber 6, the fluid 7 is sealed so that the fluid level may be positioned above the position of an opening 12a on the balance chamber 10 side of the orifice 12. The air 8 is sealed so that the air may be filled in the upper half part of the balance chamber 10 above the fluid level. The constitution allows the volume of a fluid chamber part 10b filled with the fluid 7 to be compressed or expanded by the compression or expansion of an air chamber part 10a filled with the air 8, and the fluid 7 flows between the balance chamber 10 and the pressure receiving chamber 11. |
