HYDRAULIC WORKING MACHINE

专利名称：HYDRAULIC WORKING MACHINE发明人：UDAGAWA, Tsutomu,SAKURAI,

Shigeyuki,SUZUKI, Yukihito

申请号：EP188388.8申请日：20180809公开号：EP3581718A1公开日：20191218

专利附图：

摘要：A hydraulic work machine is provided in which left and right hydraulic motorsare driven independently of each other by two hydraulic pumps and in which an anomalyof any of the left and right track devices can be detected with high accuracy. The

hydraulic work machine includes a first pressure sensor 13 configured to detect a firstpump pressure that is a delivery pressure of a first hydraulic pump 11 and a secondpressure sensor 23 configured to detect a second pump pressure that is a deliverypressure of a second hydraulic pump 21. When a controller 2 decides, from detectionresults of a travel operation detector 5 and work operation detectors 3 and 4, that awork implement 103 is not operated but travel operation devices 6 and 7 are operatedand besides left and right track devices 50 and 60 are straightly traveling, the controller2 calculates an anomaly decision evaluation value based on a pressure difference valueobtained by subtracting one from the other of the first pump pressure and the secondpump pressure and decides, based on a result of comparison between the anomalydecision evaluation value and a predetermined decision reference value 84, that one ofthe left and right track devices has an anomaly.

申请人：Hitachi Construction Machinery Co., Ltd.

地址：16-1, HigashiUeno 2-chome Taito-ku Tokyo 110-0015 JP

国籍：JP

代理机构：Manitz Finsterwald Patent- und Rechtsanwaltspartnerschaft mbB

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