Patent ID: 6487924
Filing Date: 2002-12-03
Classification: F16H,Y10T

Abstract:
In a working vehicle comprising a front housing (1) and a 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 (14, 15), a transmission assembly characterized in:that there are provided within said front housing (1) two fluid-operated supplementary speed change mechanisms (9, 10) which are disposed before and behind a bearing support wall (4) and are connected to each other in series, said bearing support wall dividing the inside of said front housing into front and rear chambers, one of said supplementary speed change mechanisms being formed into a direction-reversing mechanism and the other of said supplementary speed change mechanisms being formed into a high/low speed-selecting mechanism, and that two transmission shafts (8, 12), on which fluid-operated clutches (38F, 38R, 45, 46) of said supplementary speed change mechanisms (9, 10) are mounted, are disposed non-coaxially with each other and are supported by said bearing support wall (4), rotary joints (54F, 54R, 54L 55H, 55L) for connecting fluid passages (51F, 51R, 51L, 52H, 52L), which are formed in said two transmission shafts and are in fluid communication with said fluid-operated clutches, to stationary fluid passages being formed in outer circumferences of said two transmission shafts (8, 12) at an inside of said bearing support wall (4).