| 摘要 |
PURPOSE:To facilitate omnidirectional vehicle travel operation, and prevent incorrect operation by carrying out supply control on pressure oil to a hydraulic motor to drive rear wheels and respective steering cylinders of front/rear wheels according to operation of an operation lever and a turning knob. CONSTITUTION:Front wheels 3 are installed in the front left/right parts of a vehicle by means of a front steering cylinder 6 so as to be capable of turning freely, and rear wheels 9 driven by a hydraulic motor 10 are installed in the rear left/right parts of the vehicle by means of a rear steering cylinder 13 so as to be capable of turning freely. There are provided respective directional control valves 20-23 so as to supply pressure oil respectively to the respective steering cylinders 6 and 13 and the hydraulic motor 10. There are also provided an operation lever 31 to be tilted forward/backward and left/right and a turning knob 32 rotatable left/right. The respective directional control valves 20-23 are controlled in a switching system through a controller 30 according to operation signals from the operation lever 31 and the turning knob 32. Thereby, omnidirectional vehicle travel operation can be facilitated, so that incorrect operation can be prevented. |
