| 摘要 |
PCT No. PCT/EP83/00008 Sec. 371 Date Sep. 6, 1983 Sec. 102(e) Date Sep. 6, 1983 PCT Filed Jan. 14, 1983 PCT Pub. No. WO83/02482 PCT Pub. Date Jul. 21, 1983.A hydraulic radial piston pump or motor comprises a rotary cylinder unit (20) mounted to rotate on a fixed pintle (25), the unit (20) having radial cylinder bores formed by cylinder sleeves (23) each housing a piston (40) connected by a ball joint (44) to a slipper (45) engaging a surrounding annular track ring (47). The unit (20) also includes a separately formed central sleeve (21) having ports (26) cooperating with ports (31,32) in the pintle, the pintle ports (31,32) and the sleeve ports (26) being elongated in a circumferential direction. The pintle has three parallel flow passages, two (28') of smaller diameter than the third (27'). The slippers (45) are held resiliently against the track ring (47) by a band (66) having windows (68) which fit the slippers, the band being of resilient material and split at one point. The cylinder unit (20) has a rounded external surface and is free to float in an axial direction which provides a self-centering effect. |
