| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drive device of a hydraulic actuator that can take out kinetic energy transmitted to the hydraulic actuator as usable energy in a hydraulic circuit of a closed circuit. <P>SOLUTION: A winch 15 is rotated by the weight of a suspended load which descends when performing a reel-down operation, a working fluid of a drive circuit 25 is made to communicate by a hydraulic motor 21 which is driven by the rotating winch 15, and power is generated by the pressure of the working fluid which communicates in the drive circuit 25. By this arrangement, a rotation force which is generated by the transmission of the weight of the descending suspended load to the winch 15 can be utilized as electric energy, and energy efficiency can be improved. <P>COPYRIGHT: (C)2012,JPO&INPIT |
