| 摘要 |
1,187,812. Hydrostatic transmission. SOC. ANON. ANDRE CITROEN. 9 May, 1967 [23 May, 1966], No. 21581/67. Heading F2C. [Also in Division F1] In a hydrostatic transmission for a vehicle wherein a variable displacement swash-plate pump 2 having a rotary cylinder block 4 supplies pressure liquid to two or more motors 36, 37, a driving gear 15 fast with the cylinder block 4 is driven from an input shaft (1) through a reduction gear (12), 15. The gear 15 may be integral with the cylinder block 4. The input shaft (1) may, Fig. 1 (not shown), be parallel to the pump axis and drive the cylinder block through straight or helically toothed gears (12), 15, or the input shaft may be perpendicular to the pump axis and drive the cylinder block through bevel gears. The rotary cylinder block 4 of the pump bears against the spherical surface of a fixed distributer plate 21 and carries pistons 6 which bear on the spherical surface of a non-rotary swash-plate 7. The inclination of the swashplate 7 is varied by supplying pressure fluid to a servo 61. A spring 32 acts through a sleeve 20 to bias the cylinder block 4 into engagement with the distributer plate 21. During normal running the spring pressure 32 is augmented by supplying pump output pressure to the interior of the sleeve 20 and during overrun the return pressure augments the spring pressure. The motors 36, 37 have radial pistons 40, 41 carried by output cylinder blocks 36, 37 and engaging eccentric rings 42, 43 freely rotatably mounted in housings 48, 49 which are pivoted about an axis 53 to vary the eccentricity of the rings 42, 43 and thus the displacement of the motors. Alternate pistons 40 (or 41) of each motor are oppositely inclined to a radial plane. Pressure fluid is supplied to the motors 36, 37 through a common distributer 28. |
