| 摘要 |
A continuously variable hydrostatic transmission includes an input shaft (14) connected to drive a hydraulic pump unit (18), a grounded hydraulic motor unit (20), and an output shaft (16). A wedge-shaped swashplate (22) is pivotally mounted to the output shaft (16) in driving connection to receive output torque resulting from the exchange of pressurized hydraulic fluid between the pump and motor units (18, 20) through slots in the swashplate (22). A hydraulically actuated ratio controller shifts the axial positions of spherical bearings (90, 110) mounting a pump portplate (88) in the hydraulic pump unit (18) and a motor portplate (108) in the hydraulic motor (20) unit to adjust the swashplate angle relative to the output shaft axis and thereby change transmission ratio.
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