| 摘要 |
PURPOSE:To enhance performance of interrupting any high frequency vibration by allowing variation of the substantial volume of a fluid chamber by means of a rubber elastic film, with regard to the fluid enclosed in each fluid chamber. CONSTITUTION:An external cylindrical metal fitting 18 opposite a fluid chamber 28 via a rubber elastic film 42, is provided with holes 40 functioning as respective voids. As the result, each rubber elastic film 42 is capable of making elastic deformation in both expanding into the hole 40 side and contracting into the fluid chamber 28 side so that the volume of the fluid chamber 28 can be increasd or decreasd. Accordingly, the fluid enclosed in each of fluid chambers 28, 30 does not yield any rigid action, thus a soft properly can be maintained against vibratory exciting input power in a high frequency region. |
