| 摘要 |
<p>A hybrid construction machine using a hydraulic motor and an electric motor to drive the rotating body is configured in such a manner that, when an actuator for the rotating body and other actuators are operated in combination, the combined operation can be performed satisfactorily independent of the state of operation of the electric motor. A control device performs either combined hydraulic-electric rotation control which, when a rotation operation lever device is operated, drives a rotating body by the sum of the torque of an electric motor and the torque of a hydraulic motor, or exclusively hydraulic rotation control which drives the rotating body by the torque of the hydraulic motor alone. The control device controls the respective drive torque or the respective drive force of the electric motor, the hydraulic motor, and a second hydraulic actuator so that the following relationships are substantially the same: the relationship of the position or the speed of the second hydraulic actuator relative to the rotation angle or the rotation speed of the rotating body, the relationship being established in a combined operation in which the rotation operation lever device and a second operation lever device are operated at the same time while the combined hydraulic-electric rotation control is being performed; and the same relationship as that mentioned above, but established in the combined operation performed while the exclusively hydraulic rotation control is being performed.</p> |
