Electrically driven work machine
There is provided an electrically driven work machine including an electric motor that is a prime mover, an inverter that controls the electric motor, a power feed system that supplies power to the inverter, a driving battery device that stores the power supplied from the power feed system and supplies the power to the inverter, a control battery that supplies power for control for the inverter, the power feed system, and the driving battery device, and an opening-closing cover that covers the power feed system. The electrically driven work machine includes a control power interruption device that interrupts supply of the power for control with respect to the inverter, the power feed system, and the driving battery device in conjunction with opening of the opening-closing cover.
1 . An electrically driven work machine comprising:
an electric motor that is a prime mover;
an inverter that controls the electric motor;
a power feed system that supplies power to the inverter;
a driving battery device that stores the power supplied from the power feed system, and supplies the power to the inverter;
a control battery that supplies power for control for the inverter, the power feed system, and the driving battery device; and
an opening-closing cover that covers the power feed system, wherein
the electrically driven work machine includes a control power interruption device that interrupts supply of the power for control with respect to the inverter, the power feed system, and the driving battery device in conjunction with opening of the opening-closing cover;
a sensor that detects opening of the opening-closing cover,
a base frame,
a cab that includes an operation seat and is mounted on the base frame,
a rotating shaft that joins the cab to the base frame and is disposed at a front part of the cab so as to allow a rear part of the cab to rise and lower, and
a machinery room that is interposed between the base frame and the cab, and houses the power feed system and the inverter,
the cab is the opening-closing cover and is formed to tilt up and down with use of the rotating shaft as a fulcrum to open and close the machinery room,
the sensor is disposed at a position closer to the rotating shaft with respect to the inverter and detects a tilted-up state of the cab,
the control power interruption device interrupts supply of the power for control with respect to the inverter, the power feed system, and the driving battery device when tilt-up of the cab is detected by the sensor, and
the inverter is disposed at a rear part of the machinery room.
2 . The electrically driven work machine according to claim 1 , wherein
the control power interruption device is a relay disposed in a control power supply circuit that connects the inverter, the power feed system, and the driving battery device to the control battery, and
the relay is formed in such a manner that a contact opens in association with detection of opening of the opening-closing cover, the detection being performed by the sensor.
3 . The electrically driven work machine according to claim 2 , wherein
the electrically driven work machine includes a controller that is operated by the power for control from the control battery and that controls the inverter and the power feed system,
the relay interrupts supply of the power for control with respect to the controller when opening of the opening-closing cover is detected by the sensor.
4 . The electrically driven work machine according to claim 1 , wherein
the sensor is disposed at a position closer to the rotating shaft with respect to the operation seat.
5 . The electrically driven work machine according to claim 1 , wherein
the sensor includes
a body that is fixed to the cab and internally has a contact, and
a lever that pivots relative to the body to open and close the contact,
the sensor detects the tilted-up state of the cab on a basis of a state of the contact, and
a bracket that faces a rear side of the lever in such a manner as to be capable of abutting against the rear side of the lever is attached to the base frame.