| 摘要 |
PROBLEM TO BE SOLVED: To enhance energy recovery efficiency by return oil by shortening a hydraulic duct making a connection between a hydraulic actuator and a hydraulic regenerative valve.SOLUTION: A revolving regenerative valve 40 is fitted directly to a motor housing 19A of a revolving motor 19, and thereby configured to guide return oil from the revolving motor 19 directly to the revolving regenerative valve 40 without connecting the revolving motor 19 and revolving regenerative valve 40 directly to each other through a hydraulic hose etc. Consequently, the need for a hydraulic duct connecting the revolving motor 19 and revolving regenerative valve 40 to each other can be eliminated, and an oil passage which guides the return oil from the revolving motor 19 to the regenerative hydraulic motor 23 can be made as short as possible. As a result, pressure loss when the return oil from the revolving motor 19 flows through the oil passage can be suppressed, and energy recovery efficiency by the return oil from the revolving motor 19 can be enhanced. |
