| 摘要 |
PROBLEM TO BE SOLVED: To facilitate that an operater can carry out the speed change operation of a main speed changing device without the sense of incompatibility, in a traveling speed change structure of a working vehicle where a main speed change device being possible in speed change operation to plural stages and a subspeed change device equipped with a standard speed change position and a extraordinary speed change position are arranged in series. SOLUTION: Main speed change devices A, B being possible in speed change operation to plural stages and a subspeed change device C2 equipped with the standard speed change position and a extraordinary speed change position having a transmission ratio different from the standard speed change position are arranged in series, and when the main speed change devices A, B are speed changing-operated by operating the first artificial speed change tool, the sub speed change device C2 is automatically speed changing-operated to the standard speed change position in an interlocking state with the main speed change device. |
