Patent ID: 9062692
Filing Date: 2015-06-23
Classification: B60K,E02F,F15B,H02K,Y02T

Abstract:
1. A hybrid construction machine comprising: an engine including a crankshaft; a hydraulic pump connected to the engine and configured to drive a hydraulic actuator; a generator motor connected to the engine and configured to operate as a generator by power of the engine to thereby charge an electric storage device and operate as a motor by electric power of the electric storage device to thereby assist the engine; a flywheel attached to the crankshaft; and a coupling connecting a pump shaft included in the hydraulic pump to a rotor shaft included in the generator motor, wherein the generator motor includes: (i) the crankshaft and the flywheel are directly coupled to each other, and the flywheel and the rotor shaft are directly coupled to each other, defining first coupling surfaces of the flywheel and the rotor shaft, (ii) the coupling is directly coupled to an end face of the rotor shaft on an opposite side to the flywheel, defining second coupling surfaces of the coupling and the rotor shaft, and the pump shaft is connected to the coupling, and (iii) the first coupling surfaces and the second coupling surfaces are arranged within a width range of the coil.