| 摘要 |
PROBLEM TO BE SOLVED: To provide a traveling transmission device of a combine harvester which can efficiently transmit an engine output to a traveling device and advantageously switch forward and backward traveling from viewpoints of a configuration and operation.SOLUTION: When a continuously variable speed unit is shifted to a high-speed reverse rotation variable speed range RH, a planetary variable speed unit outputs a compound drive force on a backward traveling side, and while the continuously variable speed unit is shifted to a speed reduction side in the high-speed reverse rotation variable speed range RH, the compound drive force on the backward traveling side output by the planetary continuously variable speed unit is decreased. When the continuously variable speed unit is shifted to a set intermediate speed position X, the output of the planetary variable speed is stopped. When the continuously variable speed unit is shifted to a low-speed reverse rotation variable speed range RL and to a normal rotation variable speed range F, the planetary variable speed unit outputs a compound drive force on a forward traveling side, and while the continuously variable speed unit is shifted to the speed reduction side in the low-speed reverse rotation variable speed range RL as well as shifted to a speed increase side in the forward rotation variable speed range F, the compound drive force in the forward traveling side output by the planetary variable speed unit is increased. |
