Hydromechanical transmission for the continuous change of the ratio of the rotational speeds of an initially - and an output shaft and for the reversal of the direction of rotation of the output shaft

摘要

The power is transmitted by the drive shaft 9 in parallel by means of the epicyclic gear train 21 to the hydrostatic system 15 mounted in parallel on the mechanical transmission 16, which comprises an inverter 24 upstream of the output of the hydrostatic motor 20. A hydraulic coupler 25 controlled by the clutch 26 is mounted in parallel on the planetary gear train of power bypass 21 so as to allow the addition of an additional torque in the difficult situations. / p & & p & the apparatus of the invention makes it possible to retain the qualities of flexibility of the hydrostatic system while improving the efficiency of the transmission / p & & p & application to the transmission of the direction of the caterpillar vehicles.