| 摘要 |
The invention relates to an arrangement for mutually locking a first member (3a) in a desired position of rotation in relation to a second member (4), by blocking a flow of hydraulic fluid into and/or out of a hydraulic piston-cylinder device, through the agency of a valve, the action points of the piston-cylinder arrangement coacting with a respective one of the first and second members, with the action points located on one side of a rotational axis which is common to the first and second members. A first hydraulic piston-cylinder device (5) is mounted on one side of the rotational axis (7) and a second piston-cylinder device (6) is mounted on the other side of the rotational axis, and similarly oriented chambers (5a, 6a) in the first and second hydraulic piston-cylinder devices are mutually connected via respective hydraulic lines (10, 11) provided with valves (12, 13). The arrangement includes a further valve (14) which couples together the hydraulic lines (10, 11). |
