| 摘要 |
PURPOSE:To simplify a drive circuit and to reduce the cost of the circuit by a method in which an oil-pressure driver is provided with a lift operation valve and a tilt operation valve, and the lift and tilt cylinder are reciprocally operated to raise or lower an arm and also to drive an attachment in a rocking manner. CONSTITUTION:A lift cylinder 8 is reciprocally operated by switching the operation of a lift operation valve 3 in such a way as to enable a lift arm 3 to rise, lower, or rock. A tilt cylinder 14 is also reciprocally operated by switching the operation of a tilt operation valve 4 in such a way as to enable an attachment 6 on the tip of the arm 5 to tilt or rock. The cylinder 8 is operated by pressure oil from an pressure oil pump and the return oil is dividedly sent through a guide path 9 to a divided flow path 17. The oil is partly guided to the valve 4 and the remaining oil is returned through a return oil path 12 to an oil pressure tank 13. The attachment 6 can thus be raised or lowered in parallel, whereby the circuit can be simplified, and the cost can also be reduced. |
