Mechanical structure facilitating multi-layer storage of prefabricated parts

The mechanical structure comprises a base, a bearing frame is arranged at the top of the base, supports which are arranged at equal intervals are fixedly connected to the bearing frame, guide rods are arranged on the two sides of each support, top blocks are connected to the guide rods in a sliding mode, protective nets are arranged on the two sides of the bearing frame, and the protective nets are connected to the top blocks in a sliding mode. A guide frame is fixedly connected to the front side of the bearing frame, a hydraulic cylinder is installed on the base, the output end of the hydraulic cylinder is connected with a supporting shell, a lead screw is arranged in an inner cavity of the supporting shell, one end of the lead screw penetrates through the supporting shell to be connected with a driving motor, and a threaded sleeve is connected to the lead screw; the top of the threaded sleeve is connected with a sliding plate, a pulley is arranged at one end of the sliding plate, the hydraulic cylinder, the