| 摘要 |
PURPOSE:To secure the effective vibrationproof effect with a simple structure by connecting the first and second supporting metal fittings with each other by a rubber elastic body and charging the inside of a fluid chamber formed thereby with two kinds of the viscous fluid having different dynamic viscosity so as not to be mixed together, and positioning the first and second bevel members which spread at right angle in the vibration input direction in each viscous fluid. CONSTITUTION:When the vibration in the vertical direction is inputted into between the first and second supporting metal fittings 12 and 14, high viscosity fluid 32 flows in reciprocation at right angle in the vibration input direction according to the variation of the gap interval of a thin gap part 38, and a shearing stress proportional to the flow speed is generated, and a damping force is developed. Since the shearing stress is proportional to the area of the thin gap part 38 and inversely proportional to the interval, the damping effect for the low frequency vibration can be developed by adjusting the shape of the thin gap part 38. The low viscosity fluid 30 flows in reciprocation in the vibration input direction in a throttle part 36, and the prescribed vibrationproof effect is developed on the basis of the resonance action of the low viscosity fluid 30. The low dynamic spring effect for the high frequency vibration corresponding to the confined sound, etc., can be developed by adjusting the ratio between the sectional area of the throttle part 36 and the length. |
