A lifting device comprises a delivery direction-reversible hydraulic unit and at least three hydraulic lifting cylinders. The hydraulic cylinders are dimensioned in a stepped manner in such a way that the piston rod working space of an n-th lifting cylinder and the piston working space of an (n+1)-th lifting cylinder, with n from 1 to z−1, wherein z indicates the number of hydraulic lifting cylinders of the lifting device, have the same effective area. The at least three lifting cylinders are hydraulically connected in series in such a way that the respective working spaces with the same effective area are directly fluidically coupled by means of a hydraulic connection. The piston working space of the first lifting cylinder and the piston rod working space of the z-th lifting cylinder are in fluid connection with the connections of the delivery direction-reversible hydraulic unit.
Driverless transport system
2021-03-30
Patent
Elektronische Ressource
Englisch
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 / B65G TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS , Transport- oder Lagervorrichtungen, z.B. Förderer zum Laden oder Abladen / G05D SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES , Systeme zum Steuern oder Regeln nichtelektrischer veränderlicher Größen |