Ratio controller for continuously variable hydrostatic transmiss

Details Ratio controller for continuously variable hydrostatic transmiss Ratio controller for continuously variable hydrostatic transmiss

1995-01-30

1996-07-16

Nguyen, Hoang

Power plants

Pressure fluid source and motor

Input pump and rotary output motor system having...

91505, F16D 3900

Patent

active

055355897

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

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