| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite lifting stage that has sub stages to be mutually movable and has a large span to be stable.SOLUTION: A composite lifting stage comprises a main stage, sub stages 4, 5 and a main control system. The main stage comprises a base structure 1, fixed guiding means 2 for the main stage and driving means 3 for the main stage, wherein the base structure 1 has an iron frame structure. The fixed guiding means 2 for the main stage are arranged at both ends of the base structure 1, and the driving means 3 for the main stage comprise symmetrically arranged hydraulic cylinders and hydraulic drivers. The sub stages 4, 5 that can be lifted are fixed on the platform surface of the main stage. The main stage moves vertically, and on the other hand, the sub stages 4, 5 move relatively in a vertical direction, or otherwise, the sub stages 4, 5 move independently. All of the sub stages 4, 5 can move synchronously, or the sub stages 4, 5 can move separately or in a group. |
