发明名称 HYDRAULIC SHOVEL
摘要 Provided is a hydraulic shovel capable of moving a boom, an arm, and a bucket at respective adequate speeds even during complex operations thereof, without a significant pressure loss. This hydraulic shovel includes: a first pump (31) connected to a boom actuator (24) and a bucket actuator (28); a second pump (32) connected to an arm actuator (26) and the boom actuator (24); a third pump (33) connect to the arm actuator (26); a boom control valve (54) interposed between the first pump (31) and the boom actuator (24); an arm control valve (56) interposed between the second pump (32) and the arm actuator (26); a bucket control valve (58) interposed between the first pump (31) and the bucket actuator (28); a boom merging valve (55) for speed increase interposed between the second pump (32) and the boom actuator (24); and an arm merging valve (57) for speed increase interposed between the third pump (33) and the arm actuator (26).
申请公布号 EP2980325(A1) 申请公布日期 2016.02.03
申请号 EP20140776370 申请日期 2014.02.27
申请人 KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.);KOBELCO CONSTRUCTION MACHINERY CO., LTD. 发明人 SUGANO, NAOKI;NANJO, TAKAO;OGUMA, SHOTA;MAEKAWA, SATOSHI;UEDA, KOJI
分类号 E02F9/22;F15B11/02;F15B11/17 主分类号 E02F9/22
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