Title:
HYDRAULIC DRIVING DEVICE OF WORKING MACHINE
Document Type and Number:
Japanese Patent JP2019199881
Kind Code:
A
Abstract:
To provide a hydraulic driving device capable of being automatically controlled with high accuracy regardless of execution of a regeneration operation.SOLUTION: A hydraulic driving device includes a boom flow rate control valve 36, an arm flow rate control valve 37, a regeneration control valve 43 capable of changing a regeneration rate with respect to an arm cylinder 27, a pump control device executing horsepower control, a posture detection device 60, boom flow rate control devices 76, 100 switchable between a normal control mode and an automatic control mode for adjusting a boom flow rate to move a working attachment along a target locus, and regeneration control devices 93, 100. The regeneration control devices set the regeneration control valve 43 on a regeneration position in a low load, set the same on a regeneration cut position in a high load, and lower a regeneration rate in the low load when the boom flow rate control device is switched to the automatic control mode.SELECTED DRAWING: Figure 2
Inventors:
MAEKAWA TOMOHITO
KAWAI HIROAKI
KAMIMURA YUSUKE
KAWAI HIROAKI
KAMIMURA YUSUKE
Application Number:
JP2018093013A
Publication Date:
November 21, 2019
Filing Date:
May 14, 2018
Export Citation:
Assignee:
KOBE STEEL LTD
KOBELCO CONTSTRUCTION MACHINERY LTD
KOBELCO CONTSTRUCTION MACHINERY LTD
International Classes:
F15B11/024; E02F3/43; E02F9/22; F15B11/02; F15B11/028; F15B11/08; F15B11/17
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Muramatsu Toshiro
Masataka Otani
Muramatsu Toshiro