Title:
Work machine hydraulic drive
Document Type and Number:
Japanese Patent JP6304273
Kind Code:
B2
Abstract:
Provided is a hydraulic drive system capable of causing a specific action of a main actuator and an action of an optional actuator simultaneously and properly. The system includes: first and second pumps (11, 12); a first main supply fluid line and an optional supply fluid line leading to the first pump (11); a second main supply fluid line leading to the second pump (12); a main manipulating device (31) for the main actuator (7); an optional manipulating device (32) for the optional actuator (8); a bleed-off flow rate regulating section (42) to change the bleed-off flow rate for the second pump (12); and a bleed-off control section to operate the bleed-off flow rate regulating section (42) to change the discharge flow rate of the second pump (12) in accordance with a control operation applied to the main manipulating device (31) and to make a bleed-off flow rate in a specific combined manipulation state where a specific main control operation and an optional control operation are simultaneously performed be smaller than that in a single main manipulation state.
Inventors:
Koji Ueda
Application Number:
JP2016020671A
Publication Date:
April 04, 2018
Filing Date:
February 05, 2016
Export Citation:
Assignee:
Kobelco Construction Machinery Co., Ltd.
International Classes:
F15B11/042; F15B21/044; E02F9/22; F15B11/02; F15B11/08; F15B11/17
Domestic Patent References:
| JP9217385A | ||||
| JP2014009794A | ||||
| JP2007100779A | ||||
| JP6050309A |
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Muramatsu Toshiro
Masataka Otani
Muramatsu Toshiro