| 摘要 |
PURPOSE:To arbitrarily vary spring constant and improve responsiveness by supporting a shaft member made of electric conductive material through a support made of nonconductive material at the center part of a pipe body made of electric conductive material and charging the part between the shaft part with the electric viscous fluid whose viscosity varies according to the applied voltage. CONSTITUTION:A seal ring 4 made of insulative material is fixed on the inside of an outer pipe 2 which is made of electric conductive material constituting a spring body, by caulking parts 2A and 2B, and an inner pipe 3 is arranged inside, and engaged by the caulking parts 3A and 3B. At the other edge 1B of the coil spring 1, an end cap 13 which is made of the insulative material and fixed at the edge part of the inner pipe 3 is fitted on the inside of the edge part of the outer pipe 2, and the inner pipe 3 is supported by a support 18 made of insulative material, and the shift in the crossing direction is regulated. Further, the fluid chamber 20 and 21 are sealed with an electric viscous fluid whose viscosity is varied according to voltage, and each voltage is applied from the electric wirings 11 and 12 to the outer and inner pipes 2 and 3. Therefore, the spring constant can be arbitrarily varied by the applied voltage, and responsiveness can be improved. |
