| 摘要 |
<p>A radial piston motor comprising a cylinder block (1), a motor case (3) fitted rotatably to the outer peripheral surface of the cylinder block and having a rotating cam (12) on the inner surface thereof, a plurality of cylinder portions (9) having a cylinder hole (6) radially formed in the cylinder block, a piston (7) slidably fitted into the cylinder hole (6) and a rotating roller (10) disposed at one of the ends of the piston and facing the rotating cam, a plurality of change-over valves (24) having a spool hole (20a) formed radially in the cylinder block and a spool (20) slidably fitted into the spool hole and switching allowing the chamber of the cylinder portion to communicate with an oil pressure source and a tank selectively through reciprocation of the spool, and a spool switching cam (23) rotating with the motor case to thereby reciprocate the spool, wherein a high pressure oil is supplied to some of the chambers (8) of the cylinder portions through the change-over valves (24), and the other of the chambers (8) are made to communicate with the tank, so that some of the rotating rollers are pressed on the rotating cam and the motor case is rotated.</p> |
