| 摘要 |
A control device for hydraulic working cylinders with a hydraulic medium pump (1) driven by a motor (2) which can be caused to communicate with a chamber of at least one lifting cylinder (11) and at least one lock cylinder (14) of the loading board wall via pump branch lines (8', 8'') from a pump line (8) and via appropriate control valves (9, 10; 12, 13), in which a pressure conversion piston cylinder (15) is fitted in parallel to the pump branch lines (8', 8'') and to the chamber of the smaller piston side of the pressure conversion piston cylinder (15) communicating with the lock cylinder(s) is connected an electric pressure switch (16), by which the pump rotor (2) may be stopped when a predetermined pressure is exceeded, or an adjustable hydraulic valve via which the pump branch lines (8', 8'') may be blocked or the pump line (8) may be put into communication with a return line (7) to the medium tank (4) and the pump motor (2) may be stopped. |
