HYBRID CONSTRUCTION EQUIPMENT

摘要

The axial lengths of coupling portions of a flywheel, a rotor shaft, and a pump shaft are reduced to reduce the axial length of an entire power unit. A crankshaft 4 and a flywheel 8 are directly coupled to each other and the flywheel 8 and a rotor shaft 5 are directly coupled to each other. A coupling 20 is directly coupled to an end face of the rotor shaft 5 on the opposite side to the flywheel 8. A pump shaft 6 is connected to the coupling 20. Coupling surfaces of the flywheel 8 and the rotor shaft 5 and coupling surfaces the rotor shaft 5 and the coupling 20 are arranged within a width range of a coil 19.