| 摘要 |
<p>PURPOSE:To facilitate control and improve operation efficiency by installing a proportional solenoid valve for elevation between a hydraulic pump and a check valve and installing a proportional solenoid valve for descent between the check valve and a tank. CONSTITUTION:A proportional solenoid valve 26 for elevation is installed between a hydraulic pump 20 and a check valve 10, and a proportional solenoid valve 22 for descent is installed between the check valve 10 and a tank 11. Therefore, the flow-rate per hour of the pressurized-oil supplied or discharged from a shift cylinder 6 can be freely and easily adjusted by adjusting electric signals, and control is facilitated, and operation efficiency can be improved.</p> |
