| 摘要 |
<p>A hybrid machine with a hydraulic drive device having hydraulic actuators allowed to operate against and by external loads, comprising hydraulic cylinders (7), first hydraulic pumps (P1) connected, with closed circuits, to the head side pressure receiving chambers (7S) and the bottom side pressure receiving chambers (7L) of the hydraulic cylinders (7), and second hydraulic pumps (P2) connected, with open circuits, to the bottom side pressure receiving chambers (7L) and an external oil chamber (10), wherein the first and second hydraulic pumps (P1, P2) are connected to electric motors (M) so as to be driven.</p> |
