The invention relates to a three-portal-frame structure, and belongs to the technical field of manned lifting equipment. The three-portal-frame structure comprises a fixed part, a lifting part and a lifting mechanism. The fixed part comprises a chassis, and the lifting mechanism comprises a hydraulic lifting assembly and a chain wheel lifting assembly. The lifting part comprises a mounting plate used for mounting of a take-out platform. The mounting plate acts through ascending and descending of a second movable portal frame and ascends and descends by being assisted by second chain wheels and second chains. A movable portal frame is guided through guide elements and corresponding pieces thereof, and is oriented through orientation elements and corresponding pieces thereof, and the lifting process is stable and smooth through the combined action of the guide elements and the corresponding pieces thereof and the orientation elements and the corresponding pieces thereof.
Three-portal-frame structure
2015-11-25
Patent
Electronic Resource
English
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |