| 摘要 |
PROBLEM TO BE SOLVED: To provide a travel controlling device for a working vehicle by which a linear traveling and a turning traveling can be performed even when a motion abnormality occurs in the linear traveling. SOLUTION: This traveling controlling device for the working vehicle is equipped with a pair of transmission clutches 27 and 27 for linear traveling which individually intermit respective power transmissions to right and left traveling devices 1R and 1L from an infinite variable speed drive 7 for linear traveling, and a pair of transmission clutches 25 and 25 for turning which individually intermit respective power transmissions to the right and left traveling devices 1R and 1L from an infinite variable speed drive 8 for turning. Under a control mode for abnormality, each transmission clutch is switched in such a manner that when a command for linear traveling is received, the variable speed output of the infinite variable speed device 8 for turning is respectively transmitted to the right and left traveling devices 1R and 1L. When a command for a right turning is received, the variable speed output of the infinite variable speed drive 8 for turning is transmitted to the traveling device 1L on the left side, and the traveling device 1R on the right side is placed under a non-driven state. When a command for a left turning is received, the variable speed output of the infinite variable speed drive 8 for turning is transmitted to the traveling device 1R on the right side, and the traveling device 1L on the left side is placed under a non-driven state. COPYRIGHT: (C)2007,JPO&INPIT
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