For rail vehicle drive system and track vehicles using the same

A assisted by an electric motor, as a transmission, the forward and reverse drive for a tracked vehicle to be combined with an electric motor with obtaining a gear arrangement for equalizing the gear ratio at the speed level and each speed stage to provide a system. A transmission 15 which receives the output of the engine 14 in the input shaft 30, the double having a forward gear train 31 and the reverse gear train 32, a different transmission gear 51 to 54 between the output shaft 45 One of which is constructed by combining the intermediate shaft 41. By the first clutch 43 or second clutch 44 selectively shift engagement, either the rotation of the forward gear train 31 and the reverse gear train 32 is transmitted to one of the intermediate shaft 41. When the shift gear 51 to 54 is selected, regardless of the backward and forward rail vehicle, and the same speed stages and the gear ratio. The assist force by the generator motor 18 is supplied from the differential mechanism 55 to the output shaft 45 through the intermediate shafts 41 and 42. .Field