The invention relates to a crank arm type aerial work platform with easily-expanded height. The crank arm type aerial work platform comprises a running chassis, a drive device and a lifting device. A lifting arm assembly comprises a folding arm assembly, a telescopic arm assembly and a four-connecting-rod leveling arm assembly. The folding arm assembly comprises a first connecting piece, a second connecting piece, a third connecting piece, a first connecting arm, a second connecting arm, a third connecting arm, a first balance rod, a second balance rod and lifting air cylinders. The telescopic arm assembly comprises an air pressure telescopic rod and a telescopic arm. The four-connecting-rod leveling arm assembly comprises an upper connecting rod, a lower connecting rod, a leveling air cylinder and a second hinge block. A horizontal sensor is arranged on a working platform. It can be guaranteed that the work platform is kept balanced all the time in the lifting process, and the lifting height of the work platform is increased on the basis of guaranteeing stability.
Crank arm type aerial work platform with easily-expanded height
2015-11-18
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 |
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