Transmission system for working vehicles

摘要

Separate left and right hydrostatic transmissions (17) for controlling rotation of left and right final drive wheels (11) of a working vehicle independently are disposed laterally inwardly of the drive wheels in a vertical posture such that, while an input shaft (18) is directed axially outwardly of the vehicle, an output shaft (19) is directed axially inwardly of the vehicle. To each of the hydrostatic transmissions is attached a L-shaped gear box (20) which extends over axially inward and laterally outer sides of the hydrostatic transmission and supports the axle (21) of final drive wheel. Within the box is housed first and second reduction gear trains which form L-shaped transmission path between the output shaft and axle. The hydrostatic transmission (17) and gear box (20) of each side may be handled as a unit in assembling the transmission system and are compactly disposed in the proximity of each final drive wheel (11). Engine (13) is mounted at the middle of left and right hydrostatic transmissions (17) in a horizontal posture such that engine output shaft (14) is directed axially outwardly of the vehicle. The entire transmission system is thus disposed at a predetermined location in the axial or longitudinal direction of vehicle. A power take-off mechanism (25, 26) powered by the engine may preferably provided at an axial end of vehicle.