HYDRAULIC DRIVE Russian patent published in 2008 - IPC F16H39/06 B60K17/10 

FIELD: mechanics.

SUBSTANCE: invention relates to machine building. The proposed hydraulic drive comprises pump assembly, hydraulic motor and output shaft power-and-sense of rotation control mechanism. The pump assembly represents two identical-design sucking-in and sucking-out pumps representing barrels closed by covers for cylindrical sinusoidal-vane screws to revolve there inside in opposite directions. Free ends of the said screws are fitted into and through the cover holes, the cover accommodating spur gears in mesh with each other. An additional bevel gear is attached to one free end of the screw to get into mesh with the input shaft bevel gear. The sucking-in pump outlet chamber upper part and the sucking-out pump outlet chamber communicate, via pipelines, with each other and with the oil tank. The sucking-in pump outlet chamber lower part communicates, via pipelines, the hydraulic motor inlet and outlet chambers and with the sucking-out pump inlet chamber. The sucking-out pump inlet chamber communicates, via pipelines, with the hydraulic motor outlet and inlet chambers. Both slide valves are articulated to the control handle adjusting the output shaft sense of rotation. The sucking-in pump outlet chamber and sucking-out pump inlet chamber communicate, via a pipeline, with each other. The slide valve is articulated to the hydraulic drive output control handle. The hydraulic motor represents a casing with a rotor fitted therein, the rotor vanes being fitted in the casing radial slots and automatically extending therefrom.

EFFECT: simpler design and higher efficiency.

5 dwg