CONSTRUCTION MACHINE

摘要

A construction machine is provided with: a rotatable body (50); a hydraulic pump (1); a hydraulic motor (3) which drives the rotatable body (50) using hydraulic oil supplied from the hydraulic pump (1); an electric motor (14) which, either singly or together with the hydraulic motor (3), drives the rotatable body (50); and a hydraulic actuator (16) which can operate together with the rotatable body (50) and which is driven by hydraulic oil from the hydraulic pump (1). When simultaneously operating the rotatable body (50) and the hydraulic actuator (16), the rotatable body (50) is rotated only by the electric motor (14).