| 摘要 |
A construction machine of the electric motor drive system capable of extending the service life of electric parts such as an electric motor by the simple constitution. In an excavator in which a hydraulic pump (16, 24, 26) is driven by an electric motor (15, 33, 25), electric parts such as the electric motor (15, 23, 25), a generator (11), a battery (12) and so on are cooled by oil for operating hydraulic cylinders (18, 20, 22) and so on. <IMAGE> |
