专利名称：Working machines
发明人：日暮 昌輝,関野 聡,関根 和也,伊藤 徳孝,石田 一雄,
國友 裕一
申请号：JP2014244877申请日：20141203公开号：JP6564567B2公开日：20190821
摘要：PROBLEM TO BE SOLVED: To provide a work machine capable of compatiblysuppressing abrupt increase in a load of a hydraulic actuator and securing workability andoperability.SOLUTION: A regulator 23A of a hydraulic pump is controlled by a dischargeflow rate command arithmetic unit 64. A proportional solenoid type relief valve 27provided in a main pipe line is controlled by an allowable pressure command arithmeticunit 81. The discharge flow rate command arithmetic unit 64 regulates hydraulicconsumption power to first upper limit power by adjusting a discharge pressure of thehydraulic pump, that is, by adjusting a discharge flow rate of the hydraulic pump inaccordance with a pressure detection value of a pressure sensor 28. The allowablepressure command arithmetic unit 81 regulates the hydraulic consumption power tosecond upper limit power larger than the first upper limit power by adjusting a reliefpressure of the proportional solenoid type relief valve 27 in accordance with thedischarge flow rate (discharge flow rate command) of the hydraulic pump.SELECTEDDRAWING: Figure 4
申请人：日立建機株式会社
地址：東京都台東区東上野二丁目１６番１号
国籍：JP
代理人：特許業務法人広和特許事務所,広瀬 和彦
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