Patent ID: 6360623
Filing Date: 2002-03-26
Classification: F16H,Y10T

Abstract:
In a working vehicle comprising a front housing (1) and transmission case (2) which are arranged in series in a longitudinal direction of the vehicle and are fastened together, said front housing including at its front end portion an engine flywheel (6) and said transmission case including at least one speed change mechanism (17, 20), a transmission system characterized in:that there are provided in said front housing (1) a primary drive shaft (8) which is co-axial with said engine flywheel (6) and is adapted to be driven to rotate by said engine flywheel, a transmission shaft (11) which is arranged in parallel with said primary drive shaft, and an output shaft (13) which is co-axial with said primary drive shaft, said output shaft (13) being connected to said speed change mechanism (17, 20); and that a first two-ratio supplementary speed change mechanism (12) is disposed between said primary drive shaft (8) and said transmission shaft (11) for driving said transmission shaft by said primary drive shaft selectively at one speed selected from two different speeds and a second two-ratio supplementary speed change mechanism (14) is disposed between said transmission shaft (11) and said output shaft (13) for driving said output shaft by said transmission shaft selectively at one speed selected from two different speeds, one of said first and second supplementary speed change mechanism (12) being formed into a direction-reversing mechanism and the other of said first and second supplementary speed change mechanism (14) being formed into a high/low speed-selecting mechanism.