| 摘要 |
A multiplying device for a hydraulic output port of a tractor is provided to control a solenoid valve and an operation lever conveniently with one hand, by integrally forming a switching unit for converting the solenoid valve with the operation lever for controlling an operation valve. A multiplying device is provided to increase the number of hydraulic output ports(412a,412b) of a tractor that comprises a hydraulic pressure source(1), an operation valve(2), and an operation lever(3). The operation lever opens and interrupts flow of hydraulic oil between input ports(411a,411b) and the output ports interconnected by the hydraulic pressure source, and diverts a direction of the flow. The operation valve controls the conversion of the operation valve. The multiplying device comprises a port multiplication part(4) and a switching part(5). The port multiplication part comprises a plurality of solenoid valves(41,42,43,44) that are converted to open and interrupt flow of the hydraulic oil between the input port and the output port. The switching part connects and disconnects a current for operating the solenoid valves.
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