| 摘要 |
A grab bucket equipped with a manually opening unit is provided to open a check valve using an operating member in order for operating oil to flow in an opposite direction, thereby continuing a work in case a battery is discharged. A grab bucket equipped with a manually opening unit comprises a base, a grab, cylinders(30A,30B), a hydraulic circuit unit, a linking module, a controller, and manually opening unit. The grab fixed on the base is opened or closed. The cylinders include a piston. The hydraulic circuit unit including a two-way control check valve(43) controls flow of the operating oil. The linking module delivers movement of the piston to the grab. |
