| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide proper steering sensitivity of various running conditions in a steering gear of a combine harvester. Ž<P>SOLUTION: Right and left side clutches (3, 3) and a differential mechanism (4) are mounted on a running mission device (2) to provide structure for performing straight running, differential turning, and brake turning. The brake turning is executed by a control device (7) that performs moving average processing on a detection value of a position sensor (46) based on tilting operation of a steering control part (5) and then controls brake outputting. A turning power setting dial (45) is provided for setting the number of times of performing the moving average processing on the detection value of the position sensor (46). For the control device (7), a harvesting operation row-matching running mode, an on-road running mode, and a farm field turn running mode are provided. The number of times of performing the moving average processing on the detection value of the position sensor (46) is set small in the harvesting operation row-matching running mode, medium in the on-road running mode, and large in the farm field turn running mode. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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