| 摘要 |
PURPOSE:To reduce a diameter size of a piston rod and remarkably save consumption of electric power by controlling a flapper type valve body disposed opposite to an opening of an oil hole in a separable manner by means of a piezoelectric element. CONSTITUTION:A damping force adjustment unit 40 is constituted of a nozzle type oil hole 41, the distal opening of which is exposed from an upper chamber A to a bypass L, a flapper type valve 42 disposed opposite to the opening of the oil hole 41 in a separable manner, and a piezoelectric element 43 for holding the valve 42. The piezoelectric element 43 controls the valve 42 capable of changing the opening area of the oil hole 41 in the bypass L. A piston rod 20 is required to have a size allowable to form the adjustment unit 40 and insert a lead wire connected to the piezoelectric element 43. Therefore, the size of the piston rod can be reduced, and further, consumption of electric power can be remarkably saved. |
