The invention discloses an accurate crane hoisting machine tool which comprises a cylinder, an upper end cover, a spring, an upper piston rod, a piston, a lower piston rod, a lower end cover, a two-position two-port electromagnetic ball valve, a one-way speed regulating valve and a nut. On the basis of an ordinary crane, the accurate hoisting machine tool is additionally arranged for a crane, the flow condition of internal liquid of the accurate crane hoisting machine tool is controlled by controlling connection or disconnection of power of the electromagnetic ball valve, operation state of the accurate crane hoisting machine tool is further controlled, accurate hoisting of the crane on important occasions is realized, and important hoisted workpieces are protected. The accurate crane hoisting machine tool is simple in structure and reliable in operation, accurate hoisting operation can be completed, the important hoisted workpiece are completely protected, and a wide application prospect is achieved.
Accurate crane hoisting machine tool
2015-05-13
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 |