| 摘要 |
PROBLEM TO BE SOLVED: To surely and effectively brake right and left rear wheels only by actuating one of right and left brake pedals if the traveling speed reaches a fixed speed when a four-wheel movable agricultural machine travels on the road. SOLUTION: A solenoid S is provided on one of both arms 4a, 4b which have the same shaft center and are respectively turned by right and left brake pedals, and the other is provided with an elongated hole where an operating rod 5 projected and retreated from the solenoid S can rush or a differential gear disposed on the driving part 4 for right and left rear wheels 2a, 2b is provided with a differential lock device which can be operated or released by the solenoid S. A rotating speed pickup device 9 capable of detecting the traveling speed is disposed in a transmission path to the driving part A, and when the traveling speed of the machine body detected by the rotating speed pickup device 9 reaches a fixed speed, a controller CPU provided on the machine body enables the solenoid S to operate, whereby during traveling on the road, the right and left rear wheels 2a, 2b can be braked at the same time by actuating one of the right and left brake pedals. |
