| 摘要 |
<p>A remotely operating similar actuator for automatically following a working unit (1) up the movement of an actuator (30). Control members (61, 172, 185) for controlling hydraulic control valves (90, 170, 180) which control a hydraulic actuator (8A) of the working unit (1) are connected to movable members (71, 101, 124, 141) of mechanical differential mechanisms (70, 100, 120, 140). The other two respective movable members (76, 79; 106, 107; 122, 123; 142, 148) forming one differential mechanism are so connected as to be driven by the actuator (30) and the working unit (1). Thus, the movement of the actuator is transmitted to the control member, and the movement of the working unit is fed back to the control member. </p> |
