THREE-DIMENSIONAL HYDROMECHANICAL TRANSMISSION Russian patent published in 1999 - IPC

FIELD: mechanical engineering, in particular, devices for transmitting torque from engine to actuating mechanisms, for instance, transmissions used in self-propelled machines. SUBSTANCE: transmission has driving and driven shafts, two three-link differentials connected to shafts. Free links of differentials are connected through switch-over devices to one of two reversible regulated hydraulic machines. One of machines is connected through switch-over device to driving shaft and other machine is connected through switch-over device to driven shaft. Transmission is further provided with additional regulated hydraulic engine, which has hydraulic lines common for two other hydraulic machines, and is equipped with driven shaft clutch change-over device operating in case regulating member of hydraulic engine is in zero position. EFFECT: increased efficiency by reduced total control power of hydraulic machines and enhanced reliability in operation. 2 dwg