| 摘要 |
<p>PROBLEM TO BE SOLVED: To detect load pressure in the first chamber and the second chamber of a hydraulic actuator with a single pressure sensor. SOLUTION: This hydraulic actuator load pressure detection device has the first and the second return ports 13 and 14, as well as the first and second load pressure ports 9 and 10 formed on a meter-in flow control valve 1. This meter-in flow control valve 1, when selected at a position for feeding pressure oil to the first chamber 5 of a hydraulic actuator 4, and a position for keeping the first return port 13 and the first load pressure port 9 communicated to each other, and feeding pressure oil to the second chamber 6, comes to be communicated to the second return port 14 and the second load pressure port 10. In addition, the first and the second load pressure ports 9 and 10 are connected to a single pressure sensor 16 via a nonreturn valve 15, thereby detecting the load pressure of the first chamber 5 and the second chamber 6 with the single pressure sensor 16.</p> |
