Patent ID: 8875829

Claim:
A construction machine comprising: a lower body; an upper slewing body mounted on the lower body and configured to slew with respect to the lower body; and a hydraulic actuator provided in at least one of the lower body and the upper slewing body and configured to be actuated by receiving a supply of hydraulic oil, wherein: the upper slewing body comprises a slewing frame slewably mounted on the lower body, a first power unit configured to supply hydraulic oil for actuating the hydraulic actuator, and a second power unit configured to supply hydraulic oil for actuating the hydraulic actuator, and wherein the first power unit comprises a first engine, a first controller configured to control driving of the first engine, a first hydraulic oil tank configured to store hydraulic oil, a first hydraulic pump configured to be driven by the first engine to thereby suck hydraulic oil from the first hydraulic oil tank and discharge the hydraulic oil toward the hydraulic actuator, a first fuel tank configured to store fuel to be consumed by the first engine, and a first support member attached to the slewing frame to support the first engine, the first hydraulic oil tank, the first hydraulic pump and the first fuel tank; and the second power unit comprises a second engine, a second controller configured to control driving of the second engine, a second hydraulic oil tank configured to store hydraulic oil, a second hydraulic pump configured to be driven by the second engine to thereby suck hydraulic oil from the second hydraulic oil tank and discharge the hydraulic oil toward the hydraulic actuator, a second fuel tank configured to store fuel to be consumed by the second engine, and a second support member supporting the second engine, the second hydraulic oil tank, the second hydraulic pump and the second fuel tank, and wherein the second support member is configured to be attachable and detachable with respect to the slewing frame independently of the first support member, and the second hydraulic pump is detachably connected to the hydraulic actuator.