| 摘要 |
PROBLEM TO BE SOLVED: To achieve a high efficiency of a transmission path and enhancement of operability in a work vehicle such as a tractor while assuring weight saving and cost reduction of the vehicle.SOLUTION: A work vehicle comprises an engine 5 mounted on a travel body, a direct advance system transmission path having a first infinite variable-speed drive 17, and a revolving system transmission path having a second infinite variable-speed drive 13, in which an output of the direct advance system transmission path and an output of the revolving system transmission path are synthesized thereby driving left and right sprockets 62. The work vehicle comprises control parts 813, 814 which interlockingly control the output of the direct advance system transmission path and the output of the revolving system transmission path, an operation tool 822 for gear changing which designates the output of the direct advance system transmission path, and a detector 823 which detects the output of the direct advance system transmission path. The control parts 813, 814 alternatively select a command value from the operation tool 822 for gear changing and an actual value of the detector 823, and set the output of the revolving system transmission path.SELECTED DRAWING: Figure 14 |
