The invention relates to an aerial work platform which comprises a chassis, a platform, a lifting structure moved by hydraulic actuators (41, 42) and a hydraulic system (S), controlled by a control unit (50) and including a circulation circuit (60), an electric motor pump (80) and flow control means (90). In order to operate in a simple and economical way the controlled simultaneous movement of two different portions of the lifting structure, the actuators are divided between first and second groups (G1, G2) and the control unit determines a first target flow rate (Q1) according to the actuation of one of the actuators of the first group by the operator and a second target flow rate (Q2) according to the actuation of one of the actuators of the second group by the operator, as well as to control the motor pump with a delivery rate (QR) greater than or equal to the sum of the first and second target flow rates. In addition, the flow control means are controlled by the control unit in order to send jointly to the first and second groups a regulated proportion of the fluid delivered by the motor pump, having a controlled flow rate (Q0) equal to the sum of the first and second target flow rates, and then to divide this regulated proportion into two adjusted shares, respectively having the first and second target flow rates and respectively sent to the first and second groups. The flow control means comprise a flow control device (91) as well as a flow distribution device (92) arranged downstream of the flow control device in relation to the flow delivered by the motor pump.
AERIAL WORK PLATFORM, AND METHOD FOR CONTROLLING AN AERIAL WORK PLATFORM
12.10.2023
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 / F04B Verdrängerkraft- und Verdrängerarbeitsmaschinen für Flüssigkeiten , POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS / F04C ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS , Rotationskolben- oder Schwenkkolbenmaschinen [Kraft- und Arbeitsmaschinen] für Flüssigkeiten / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein |
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