| 摘要 |
PURPOSE:To improve vibration cutting off operation against a vibration with a small amplitude, by forming a pair of void spaces on both sides of an elastic member disposed between an inner cylinder metal fitting and an intermediate metal fitting. CONSTITUTION:The first elastic member 16 is disposed between an inner cylinder metal fitting 10 and an intermediate metal fitting 14. A pair of void spaces 30 are formed on both sides of this elastic member 16 facing each other as placing the inner cylinder metal fitting 10 inbetween. In the diametrical direction in which those void spaces are facing each other, the inner cylinder metal fitting 10 and the intermediate metal fitting 14 are to be in relative motion by shear deforming operation of the first elastic member 16. Therefore, as far as the relative motion is admitted, flexible spring character can be obtained in the facing direction of those void spaces. In other words, any vibration input in the facing direction of void spaces, is effectively absorbed by a shear deforming means of the first elastic member, when its amplitude is small. Meanwhile, when the amplitude exceeds the specified level, the inner cylinder metal fitting 10 touches the intermediate metal fitting 14, so that relatively rigid conventional spring character can be obtained by the second elastic member for forming a fluid chamber 20 communicated through an orifice member 26. |
