PLANETARY GEARBOX Russian patent published in 1997 - IPC

FIELD: mechanical engineering. SUBSTANCE: planetary gearbox has shaft, countershaft and output shaft, five controlled brakes, two controlled clutches, four planetary gear trains. Input shaft is engaged with centr1 LOADING MACexternal teeth of first gear train and is engaged with first gear train carrier through clutch. Countershaft is connected with brake, carrier and central gear wheel with internal teeth of fourth gear train. Output shaft is coupled with central gear wheel with internal teeth of third gear train and with carrier of fourth gear train. Central wheels with external teeth of second, third and fourth gear trains are interconnected and are connected with brake and, through clutch, are connected with central gear wheel with internal teeth of first gear train. Central gear wheel with internal teeth of second gear train is coupled with carrier of third gear train and with brake. Central gear wheel with internal teeth of first gear train and carrier of second gear train are also connected with brakes. Gearbox provides nine forward and one reverse speeds, with two control members being engaged in each speed. EFFECT: enlarged operating capabilities. 2 dwg, 1 tbl