| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a working machine which allows direct drive of a hybrid type drive device by energy contained by return fluid discharged from a fluid pressure actuator. <P>SOLUTION: A hybrid type drive device 10 is equipped with an electric motor generator 22 driven by an engine 11, a capacitor 23 and pumps 17A, 17B driven by the electric motor generator 22 and capacitor 23. A turning control circuit 28 for recovering to the capacitor 23 the power generated from a turning power generator 4sw at the time of braking rotation while actuating the turning power generator 4sw by electric power supplied from the capacitor 23 in the the hybrid type drive device 10 is provided with respect to a fluid pressure actuator control circuit 25 for controlling working fluid supplied to travelling motors 2trL, 2trR and working actuators 8bmc, 8stc, 8bkc from a pump of the hybrid type drive device 10. The fluid pressure actuator control circuit 25 is equipped with an energy regenerative motor 26 which is actuated by return fluid discharged from the working actuator to drive the electric motor generator 22. <P>COPYRIGHT: (C)2007,JPO&INPIT |
