The aerial work platform is raised and lowered to a certain position. After a period of time, the entire table will automatically drop to a certain distance under its own weight. This defect has two reasons: on the one hand, the hydraulic pressure is flexible, and the hydraulic pressure is very flexible. Under the action of temperature, the volume will change, which is reflected in the decrease of position on the table. On the other hand, the hydraulic system will inevitably cause the hydraulic valve to return under high pressure, or the seal will leak oil. Although adding a set of locking devices to the above problems can meet the positioning accuracy requirements, it will bring complexity to the structure and control, and this problem can only be solved in principle. The specific plan is to change the hydraulic-scissor drive mode to mechanical-scissor drive, that is, using a decelerating motor with brake to drive the nut to move the crossbar and push rod, and the push rod lifts the scissors fork to achieve the purpose of lifting the aerial work platform. This scheme has simple structure, light hydraulic platform, convenient processing, assembly and maintenance, small maintenance workload, and ensures the synchronization of lifting on both sides. Industry news recommendation: What is the working principle of the rail chain lifting cage
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