DIFFERENTIAL HYDROMECHANICAL VARIABLE-SPEED DRIVE Russian patent published in 2007 - IPC F16H47/04 

FIELD: mechanical engineering.

SUBSTANCE: variable-speed drive comprises two differential stages connected in series. The differential sage whose shaft is connected with the engine is the input shaft of the variable-speed drive and is made of a differential mechanism. The second differential stage is a hydraulic differential converter provided with two planet rows defined by the kinematical links of multi-gearing hydraulic pump and hydraulic motor provided with different gear ratios . The axles of the satellites of the first and second differential stages are mounted inside the housing . The housing is set in bearings inside the crankcase of the variable-speed drive and represents a carrier for both of the differential stages. The carrier is provided with the free running clutch.

EFFECT: enhanced efficiency.

2 dwg