公开(公告)号：EP3043078A4

公开(公告)日：2017-05-10

申请号：EP14840826

申请日：2014-09-01

申请人： HITACHI CONSTRUCTION MACH CO

发明人： SHIMIZU JURI ,  SAITOH TEPPEI ,  MIZUOCHI MARIKO ,  HIRAKU KENJI ,  ISHII AKINORI ,  TAKAHASHI HIROMASA ,  KUSAMA TAKASHI

IPC分类号： F15B11/02 ,  E02F9/22 ,  F15B11/08 ,  F15B11/17

CPC分类号： E02F9/22 ,  E02F9/2242 ,  E02F9/2267 ,  E02F9/2278 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/042 ,  F15B11/17 ,  F15B2211/20561 ,  F15B2211/20576 ,  F15B2211/27 ,  F15B2211/3059 ,  F15B2211/7135

摘要： To provide a driving device capable of improving the operability of a plurality of single rod hydraulic cylinders. The present invention takes a construction provided with a closed circuit A in which first and third hydraulic pumps 12, 14 and a boom cylinder 1 are connected through selector valves 43a, 45a in a closed-circuit fashion, a plurality of open circuits E, F provided with second and and fourth hydraulic pumps 13, 15 and selector valves 44a, 46a that switch the supply destinations of hydraulic oils flowing out from the second and and fourth hydraulic pumps 13, 15, and a connection passage 301 connected to sides of the selector valves 44a, 46a from which sides hydraulic oil flows out, and connected to the closed circuit A.

摘要翻译： 提供一种能够提高多个单杆液压缸的可操作性的驱动装置。 本发明采用具有闭合回路A的结构，其中第一和第三液压泵12,14和动臂缸1通过选择阀43a，45a以闭合方式连接，多个开路E，F 设置有切换从第二和第四液压泵13,15流出的液压油的供给目的地的第二和第四液压泵13,15和选择阀44a，46a以及连接到选择器侧面的连接通道301 阀44a，46a从其侧流出液压油并连接到闭合回路A.

公开(公告)号：EP2985471A4

公开(公告)日：2016-12-07

申请号：EP14783094

申请日：2014-04-02

申请人： HITACHI CONSTRUCTION MACH CO

发明人： HIRAKU KENJI ,  ISII AKINORI

IPC分类号： F15B11/17 ,  E02F9/22 ,  F04B49/00 ,  F04B49/06 ,  F15B7/00 ,  F15B11/00 ,  F15B11/08

CPC分类号： F15B11/17 ,  E02F9/2235 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F04B1/26 ,  F04B49/065 ,  F15B7/006 ,  F15B13/06 ,  F15B2211/20546 ,  F15B2211/20561 ,  F15B2211/20569 ,  F15B2211/20576 ,  F15B2211/27 ,  F15B2211/3059 ,  F15B2211/405 ,  F15B2211/6313 ,  F15B2211/6346 ,  F15B2211/6652 ,  F15B2211/7142 ,  F15B2211/88

摘要： Provided is a driving device for a working machine, which can drive one or more hydraulic pumps in a large capacity range of as high efficiency as possible. In a driving device for a hydraulic excavator, a controller (41) is provided with a first target delivery-flow-rate setting unit (41a) that computes a first target delivery flow rate of pressure oil, which is to be delivered from at least one of variable displacement hydraulic pumps (2a-2f) to a hydraulic actuator, according to a lever stroke from one of control devices 40a,40b and corresponding one of preset efficiency values set beforehand for the hydraulic pumps.