| 摘要 |
PURPOSE:To enable steering through both def. device and a combination of steering clutch and brake, by arranging a steering clutch between the def. device and steering brake in addition to a wheel steering device. CONSTITUTION:A def. device 17 and right/left steering clutches 31, 25 are arranged in the drive device of a crawler car to enable steering through both the def. device 17 and steering clutches 26L, 26R. When sensing the advancing direction through a steering sensor under mowing work of combine to perform steering automatically, speed can be varied continuously by the def. device 17 and steering brakes 10L, 10R to enable finner control of clutch than on-off control resulting in improvement of work accuracy. |
