Shovel
First Claim
1. An excavator in which an upper turning body is mounted on a lower traveling body, and an excavation attachment is provided on the upper turning body, comprising an engine as a power source, a generator driven by the engine, and a plurality of electric motors rotated by electric power supplied from the generator, wherein the electric motors as a driving source operate the lower traveling body, and the upper turning body and each operating part of the excavation attachment, wherein in the operating part provided with a hydraulic actuator, a hydraulic pump is driven by the electric motor, and said hydraulic actuator is operated by oil from said hydraulic pump.
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Accused Products
Abstract
An excavator in which a generator is driven by an engine as a power source. Electric motors are driven by electric power supplied from the generator, and a lower traveling body, an upper turning body, and operating parts of an excavation attachment are operated by the electric motors.
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Citations
13 Claims
- 1. An excavator in which an upper turning body is mounted on a lower traveling body, and an excavation attachment is provided on the upper turning body, comprising an engine as a power source, a generator driven by the engine, and a plurality of electric motors rotated by electric power supplied from the generator, wherein the electric motors as a driving source operate the lower traveling body, and the upper turning body and each operating part of the excavation attachment, wherein in the operating part provided with a hydraulic actuator, a hydraulic pump is driven by the electric motor, and said hydraulic actuator is operated by oil from said hydraulic pump.
- 7. An excavator in which an upper turning body is mounted on a lower traveling body, and an excavation attachment is provided on the upper turning body, comprising an engine as a power source, a generator driven by the engine, and a plurality of electric motors rotated by electric power supplied from the generator, wherein the electric motors as a driving source operate the lower traveling body, and the upper turning body and each operating part of the excavation attachment, wherein surplus electric power from the generator is stored in a battery, and the electric motors are driven by the electric power stored in the battery as necessary, and wherein electric power generated by regenerative control of the electric motors is stored in the battery.
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13. An excavator in which an upper turning body is mounted on a lower traveling body, and an excavation attachment is provided on the upper turning body, comprising an engine as a power source, a generator driven by the engine, and a plurality of electric motors rotated by electric power supplied from the generator, wherein the electric motors as a driving source individually operate the lower traveling body, and the upper turning body and each operating part of the excavation attachment, wherein in the operating part provided with a hydraulic actuator, a hydraulic pump is driven by the electric motor, and said hydraulic actuator is operated by oil from said hydraulic pump.
Specification