| 摘要 |
PROBLEM TO BE SOLVED: To provide a turning control device for a working vehicle capable of avoiding a drop of the operating easiness when changing-over is made from the straight running condition into a left-turning or right-turning condition. SOLUTION: The turning control device of the working vehicle is equipped with a continuously variable transmission device 7 for straight running and a continuously variable transmission device 8 for turning, and these transmission devices are put under shift control on the basis of the sensing speed of speed sensing means 58 and 59 so that the outputs of the two become equal speed in straight running. In turning, the outputs of the device for straight running and for turning are transmitted to an outer running device and an inner running device, respectively, so as to generate a speed difference between the outer and the inner. The shifting operation speed of the transmission device 8 for turning at that time is made greater than the shifting operation speed of the transmission device 7 for straight running on the basis of a speed command means 14. COPYRIGHT: (C)2006,JPO&NCIPI
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