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专利名称：CONTROL DEVICE FOR A WORKING DEVICE
CONNECTED TO A HYDRAULIC CIRCUIT
发明人：BRUCK, PETER申请号：EP02708269.2申请日：20020110公开号：EP1351879A2公开日：20031015
摘要：The invention relates to a control device for a working device (12) connected toa hydraulic circuit (10), especially for a load fork (16) which can be raised and lowered witha working cylinder (14) in a fork-lift truck, comprising a valve control unit which movesinto an adjustment position when the load fork (16) is lowered even when carrying a load(18), a predefinable maximum volume flow being maintained in the hydraulic circuit (10).By providing the valve control unit with a pressure regulator (26) limiting a pilot controlpressure for the control valve (28), once a predefinable regulating pressure differential isreached in the hydraulic circuit, said control valve moves into a regulating position inorder to maintain the maximum volume flow and the known flow control valve is replacedin the main flow by a pressure regulator (26) disposed in the pilot control circuit (40) andwhich only needs to be dimensioned for low volume flows. As a result, the control systemcan be constructed using simple, low-cost components which operate in a functionallyreliable manner and enable stabile control behaviour.
申请人：HYDAC FLUIDTECHNIK GMBH
地址：Industriegebiet 66280 Sulzbach/Saar DE
国籍：DE
代理机构：Bartels, Martin Erich Arthur
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