Electric work machine
An excavator comprising: an electric motor having a commercial power supply and a battery as the drive power sources therefor; and a hydraulic actuator having a hydraulic pump driven by the electric motor, as the hydraulic source therefor. The excavator has: a first power supply mode in which the electric motor is driven while the battery is being charged by the commercial power supply; and a second power supply mode in which the electric motor is driven only by the battery. A power supply cable for supplying power from the commercial power supply is connected to a power supply port and, if the electric motor has stopped operating, the excavator moves from the second power supply mode to the first power supply mode.
1. An electric work machine including:
an electric motor having an external power supply and a battery as drive power sources; and a hydraulic actuator having, as a hydraulic pressure source, a hydraulic pump driven by the electric motor,
the electric work machine comprising:
a first power supply mode in which the electric motor is driven while the battery is being charged by the external power supply; and
a second power supply mode in which the electric motor is driven only by the battery,
wherein:
in the case where a power supply cable for supplying electric power from the external power supply is connected to a power supply port and rotation of the electric motor is stopped, the second power supply mode is shifted to the first power supply mode; and
in the case where the power supply cable for supplying the electric power from the external power supply is connected to the power supply port, where the rotation of the electric motor is stopped, and where a cut-off lever for restricting an operation of the hydraulic actuator is rotated upward by blocking a pilot pressure used to operate the hydraulic actuator, so as to restrict the operation of the hydraulic actuator, the second power supply mode is shifted to the first power supply mode.
2. The electric work machine according to claim 1 , wherein in the case where the power supply cable is disconnected from the power supply port, the first power supply mode is shifted to the second power supply mode.
3. An electric work machine including:
an electric motor configured to receive power from one or more drive power sources, the one or more drive power sources including an external power supply and a battery as drive power sources;
a hydraulic actuator having, as a hydraulic pressure source, a hydraulic pump configured to be driven by the electric motor; and
a power supply port configured to connect/disconnect with a power supply cable;
wherein:
the electric work machine is configured to operate in:
a first power supply mode in which the electric motor is driven while the battery is being charged by the external power supply; and
a second power supply mode in which the electric motor is driven only by the battery, and
in the case where the power supply cable for supplying electric power from the external power supply is connected to the power supply port and rotation of the electric motor is stopped, the second power supply mode is shifted to the first power supply mode.
4. The electric work machine according to claim 3 , wherein the external power supply includes a commercial power supply, and wherein the power supply port is configured to receive power from the external power supply via the power supply cable.
5. The electric work machine according to claim 3 , wherein, in the case where the power supply cable is connected to the power supply port, the power supply port is configured to receive alternating-current (AC) power from the external power supply via the power supply cable.
6. The electric work machine according to claim 3 , wherein in the case where the power supply cable for supplying the electric power from the external power supply is connected to the power supply port, where the rotation of the electric motor is stopped, and where a cut-off lever for restricting an operation of the hydraulic actuator is rotated upward by blocking a pilot pressure used to operate the hydraulic actuator, so as to restrict the operation of the hydraulic actuator, the second power supply mode is shifted to the first power supply mode.
7. The electric work machine according to claim 3 , wherein in the case where the power supply cable is disconnected from the power supply port, the first power supply mode is shifted to the second power supply mode.
8. An electric work machine including:
an electric motor configured to receive power from one or more drive power sources, the one or more drive power sources including an external power supply and a battery as drive power sources; and
a power supply port configured to connect/disconnect with a power supply cable and configured to receive power from the external power supply via the power supply cable;
wherein:
the electric work machine is configured to operate in:
a first power supply mode in which the electric motor is driven while the battery is being charged by the external power supply; and
a second power supply mode in which the electric motor is driven only by the battery,
in the case where the power supply cable for supplying electric power from the external power supply is connected to the power supply port and rotation of the electric motor is stopped, the second power supply mode is shifted to the first power supply mode, and
in the case where the power supply cable is disconnected from the power supply port, the first power supply mode is shifted to the second power supply mode.
9. The electric work machine according to claim 8 , wherein the external power supply includes a commercial power supply.
10. The electric work machine according to claim 8 , wherein, in the case where the power supply cable is connected to the power supply port, the power supply port is configured to receive alternating-current (AC) power from the external power supply via the power supply cable.
11. The electric work machine according to claim 8 , further comprising a hydraulic actuator having, as a hydraulic pressure source, a hydraulic pump configured to be driven by the electric motor.
12. The electric work machine according to claim 8 , wherein, in the case where the power supply cable for supplying the electric power from the external power supply is connected to the power supply port, where the rotation of the electric motor is stopped, and where a cut-off lever for restricting an operation of a hydraulic actuator is rotated upward by blocking a pilot pressure used to operate the hydraulic actuator, so as to restrict the operation of the hydraulic actuator, the second power supply mode is shifted to the first power supply mode.
13. The electric work machine according to claim 8 , further comprising a hydraulic pump configured to be driven by the electric motor, the hydraulic pump associated with a hydraulic actuator.