| 摘要 |
PURPOSE: To vary the steering angle of a steering wheel to the operation quantity of a maneuvering handle so that steering operation in accordance with a travel condition can be made even in a work vehicle using a total hydraulic type power steering device. CONSTITUTION: This device is provided with a total hydraulic type power steering device A provided with a controller 3 operated by a maneuvering handle 4 and steering hydraulic cylinder 2, and an auxiliary control valve 6 supplying/ discharging pressure oil to/from the hydraulic cylinder 2 separately from the controller 3 respectively, and moreover a control device 8 for linking between these auxiliary control valve 6 and maneuvering handle 4 so that pressure oil supplying/discharging quantity by the auxiliary control valve 6 can be increased/decreased following the increase/decrease of the operation quantity of the maneuvering handle 4. The control device 8 is constituted into a condition where the pressure oil supplying/discharging quantity by the auxiliary control valve 6 can be increased/decreased in proportion to the operation quantity of the maneuvering handle 4. |
