FIELD: mechanical engineering.
SUBSTANCE: invention relates to hydrostatic transmission of vehicles. Hydrostatic transmission of vehicle contains pumping facility, including axial-piston hydro-pump, feed pump of axial-piston hydro-pump, reversible hydraulic motor, valve actuator with hydrocontrol, and transmission gear. Transmission gear contains connected to reversible hydraulic motor's shaft main drive shaft, on which there are installed immovable pinion gears, movable pinion gears, installed with ability of alternate interaction to immovable pinion gears, and shift mechanism of each gear. Transmission is outfitted by additional hydro-pump, additional hydraulic control valve, implemented with electro-regulation, throttle and return valve, which are sequentially installed in additional supply line. Shift mechanism of each gear additionally contains two hydraulic actuators, rods of which are connected to plug, and working circuits through the subsidiary electro-regulated hydraulically actuated valve are connected to ingoing side the feed pump and discharge. Control means of subsidiary electro-regulated hydraulically actuated valves and additional hydraulically actuated valve by electric circuits are connected to control assembly.
EFFECT: it provides improved reliability of vehicle.
1 dwg
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