| 摘要 |
PROBLEM TO BE SOLVED: To reduce a burden of a front wheel, and prevent uneven wear of a tire in rearward front/rear axles, by mounting the rearward front or rear axle right/left turnably, also generating brake force different between right/left wheels of the rearward front or rear axle. SOLUTION: A rearward front or rear axle 18 or 20 is mounted right/left turnably, also brake force is generated different between right/left drive wheels 17 or 19 of the rearward front or rear axle 18 or 20. That is, a rearward front wheel brake chamber 61 is provided for a rearward front wheel 17, a rearward rear wheel brake chamber 62 is provided for a rearward rear wheel 19, the brake chambers 61, 62 are connected to an air tank 66 respectively through relay valves 64, 65, and a signal pressure is respectively supplied to the relay valves 64, 65 by a brake valve 70. A double check valve 73 and a control valve 74 connected to the air tank 66 are respectively provided in the right/left brake chambers 61, the control valve 74 is controlled by a controller 52. The axle is thus turned by utilizing a difference between brake forces, with no large output required. |
