CONTINUOUSLY VARIABLE HYDROSTATIC TRANSMISSION.

摘要

A continuously variable hydrostatic transmission (10) includes an input shaft (14) connected to drive a hydraulic pump unit (18), a grounded hydraulic motor unit (20), and an output shaft. A wedge-shaped swashplate 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 (18) and motor (20) units through specially configured ports in the swashplate (22). A hydraulically actuated ratio (24) controller is pivotally linked to the swashplate (22) to selectively adjust the swashplate angle relative to the output shaft axis (25) and thereby change transmission ratio.