| 摘要 |
PROBLEM TO BE SOLVED: To provide an actuator that can be loaded in a narrow space between a vehicle body and a bogie of a railroad vehicle even when the actuator is equipped with a hydraulic pressure source. SOLUTION: This actuator A is equipped with a cylinder C interposed between the vehicle body B and the bogie W of the railroad vehicle, and the hydraulic source 1 for supplying fluid pressure to the cylinder, and tilts the vehicle body B with respect to the bogie C. The actuator A is provided with a flow passage 14 for connecting two pressure chambers R1, R2 in the cylinder C, a damping force generating element 15 provided midway of the flow passage 14, an opening and closing valve 16 also provided midway of the flow passage 14, a drain passage 17 for draining back pressure of a valve element 16a in the opening and closing valve 16, a normally opened first switch valve 18 provided midway of the drain passage 17 for selectively releasing and shutting off the drain passage 17, and a second switch valve 19 also provided midway of the drain passage 17 for selectively releasing and shutting off the drain passage 17. COPYRIGHT: (C)2009,JPO&INPIT
|
