| 摘要 |
PURPOSE:To increase an attenuating effect against several impacts by fixing the valve of a shape memory alloy to a piston and arranging the coil spring of the shape memory alloy to a cylinder base. CONSTITUTION:A piston 2 is supported by the coil spring 3 inserted between the piston 2 and cylinder base 9. The valve 4 consisting of the shape memory alloy restores its shape so as to cover an oil flowing hole 5 on rising of temperature. This valve 4 is departed from the hole 5 by a compression spring 7. At the time when a primary impact is applied attenuation is executed by the fluid resistance of an oil viscous body and the coil spring 3 and against a secondary impact the valve 4 covers an oil flow hole 5 to attain a stronger attenuation power. Against a tertiary impact the height of the shape memory alloy coil spring 6 is varied to become attenuation power. The attenuation effect can thus be increased against several impacts. |
