HYDROSTATIC TRANSMISSION FOR MULTI-DRIVE VEHICLE Russian patent published in 2019 - IPC B60K17/356 F16H39/06 

FIELD: machine building.

SUBSTANCE: invention relates to hydraulic volumetric transmissions. Hydrostatic transmission comprises pump station consisting of two groups of high pressure pumps with controlled working volume and adjustable make-up pumps, safety valves, suction filters, drain filters, heat exchangers, check valves. Adjustable radial-plunger hydraulic motors are connected to groups of controlled high-pressure pumps by supply and drain main hydraulic lines, as well as supply and drain hydraulic lines of hydraulic motors through valves of liquid supply shutoff. Feeding main hydraulic lines are connected to each other by bypass lines with check valves installed in them, and also connected to hydraulic control valve, controlled by liquid pressure of same supply main hydraulic lines. Actuating hydraulic lines of the hydraulic control valve are connected to the appropriate regulators of feeds of groups of high-pressure pumps, make-up pumps and parallel with the hydraulic tank through uncontrolled hydro-throttles. Hydraulic accumulators are connected to supply main lines. Hydraulic braking valves with duplicated pneumatic and electric control are arranged between drain main lines and suction main hydraulic lines. In the wheel drive mechanisms connected to the hydraulic motors, there are disc parking brakes, locked by springs and opened by pneumatic chambers. Air cavities of pneumatic chambers are interconnected with two-position pneumatic valve by pneumatic main line.

EFFECT: improvement of emergency stop of vehicle is achieved.

1 cl, 2 dwg