PADDY FIELD WORKING VEHICLE WITH FOUR-WHEEL DRIVE

摘要

PROBLEM TO BE SOLVED: To provide the subject working vehicle capable of turning so as not to damaging a paddy surface as much as possible by installing a speed-changing device of front wheels, a side brake, a means for detecting a steering angle and two controlling means. ;SOLUTION: This working vehicle has a front wheel speed-changing device 13 capable of freely carrying out a changing operation between a standard state in which the front wheels 1 are driven at nearly same speed as that of the rear wheels 2, and an accelerating state in which the front wheels are driven at a speed higher than the rear wheels, a side brake 35 capable of braking each of the right and left rear wheels independently, and a means 23 for detecting a steering angle. The working vehicle also has a first controlling means for carrying out the switching operation of the front wheel speed-changing device 13 from a standard state to an accelerating state, and operating a side brake 35 at the turning center side to a braking side when a steering operation of the front wheels 1 is carried out, and a second controlling means for carrying out the changing operation of the side brake 35 at the turning center side so that the braking force may become larger when the steering angle from the strait ahead position becomes larger, and may become smaller when the steering angle becomes smaller.;COPYRIGHT: (C)1999,JPO