| 摘要 |
PROBLEM TO BE SOLVED: To eliminate a valve which has been necessary for hydraulic pressure control for a vehicle height adjustment actuator of a suspension. SOLUTION: A piston pump 21 for the hydraulic control of actuators 12L, R for vehicle height adjustment includes a pump body and a screw shaft 27. The pump body includes pistons 24L, R which are inserted into cylinders 23L, R axially movably and not rotatably using spline engagement, and moves a hydraulic fluid between the actuators for vehicle height adjustment and hydraulic fluid chambers 26L, R formed of the pistons and the cylinders via oil lines 15L, R, by the straight movement of the pistons. The screw shaft rotates a worm wheel 29 by a motor-driven worm gear 32, is rotated integrally with the worm wheel 29, and screw-engaged with the internal diameter part of the piston. The worm wheel 29 is rotated by the rotation of a motor M, and the piston is advanced so as to be threaded by the rotation of the screw shaft 27. COPYRIGHT: (C)2012,JPO&INPIT |
