JP2018150125A5 - Excavator with lifting magnet - Google Patents

Description

The present invention relates to a hydraulic excavator can be achieved it relates to a hydraulic excavator having a lifting magnet and a control panel mounted on the work vehicle, in particular efficiency of the discharge operations of capacitor provided in the control panel.

An object of the present invention is to provide a hydraulic excavator equipped with a control panel that can efficiently discharge a capacitor by operation in a cab and efficiently perform maintenance work of a lifting magnet without going back and forth between cabs. There is to do.

To achieve the above object, the present invention includes a lower structure, said upper portion pivotally provided a swing body of the lower structure, the working machine fitted with a lifting magnet is provided on a front portion of the swing body, the A driver's cab provided at a front portion on one side in the left-right direction of the revolving structure, a machine room provided at the rear of the driver's cab in the revolving structure, a counterweight provided at a rear end of the revolving structure, and the lifting magnet The machine room includes a motor provided in the revolving body and a generator driven by the motor, and the control panel is output from the generator and is Capacitor circuit having at least one capacitor for smoothing the power supplied to the lifting magnet, a discharge circuit for discharging the charge stored in the capacitor, and the power generation In the hydraulic excavator provided with a lifting magnet which is disposed includes a breaker, and in front of the swivel body on the opposite side of the position of the cab across the working machine to cut off the power from the A discharge switch that is provided in the cab and operates the discharge circuit to discharge the capacitor; and a breaker-linked switch that operates the discharge circuit and discharges the capacitor when the breaker is turned off in conjunction with the breaker ; A relay switch interposed between the discharge circuit and the capacitor, and switched between on and off by the discharge switch and the breaker interlocking switch to switch connection and disconnection between the discharge circuit and the capacitor. And

Claims (1)

Substructure,
Turning body provided rotatably on the top of the lower structure,
A working machine provided with a lifting magnet provided at the front of the revolving structure;
A driver's cab provided at the front part on one side in the left-right direction in the revolving structure,
A machine room provided on the rear side of the operator cab in the revolving structure,
A counterweight provided at a rear end of the revolving structure, and a control panel for controlling the lifting magnet,
In the machine room, a prime mover provided in the swivel body and a generator driven by the prime mover are accommodated,
The control panel has a capacitor circuit having at least one capacitor for smoothing the electric power output from the generator and supplied to the lifting magnet, a discharge circuit for discharging the charge stored in the capacitor, and the generator In a hydraulic excavator including a lifting magnet that includes a breaker that cuts off electric power from , and is disposed at a position on the opposite side of the operator's cab across the work implement at the front of the swivel body ,
A discharge switch provided in the cab and operating the discharge circuit to discharge the capacitor;
A breaker interlocking switch that operates the discharge circuit to discharge the capacitor when the breaker is turned off in conjunction with the breaker ;
A relay switch that is interposed between the discharge circuit and the capacitor and is switched on and off by the discharge switch and the breaker interlocking switch to switch connection and disconnection between the discharge circuit and the capacitor ; Hydraulic excavator with lifting magnet .