Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2020/049623
Kind Code:
A1
Abstract:
A work machine comprising a controller (20) that executes a region limit control for controlling at least one hydraulic cylinder (32a) among a plurality of hydraulic cylinders (32), so that while an operation lever (26) is being operated, a work device (400) is positioned on or above a target surface (60) set as desired, wherein while the controller is executing the region limit control, if a jack-up angle (φ), which is the inclination angle of a vehicle body (1A) in relation to the ground surface, is greater than a preset target value (φ t), the control of at least one hydraulic cylinder is corrected so that the jack-up angle approaches the target value. The target value is set so as to vary in accordance with the posture of an arm (406).
Inventors:
SUZUKI YUSUKE (JP)
TANAKA HIROAKI (JP)
NAKANO HISAMI (JP)
TANAKA HIROAKI (JP)
NAKANO HISAMI (JP)
Application Number:
PCT/JP2018/032671
Publication Date:
March 12, 2020
Filing Date:
September 03, 2018
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/20; E02F9/24; E02F9/26
Domestic Patent References:
| WO2011049079A1 | 2011-04-28 |
Foreign References:
| JPH04366235A | 1992-12-18 | |||
| JP2017223096A | 2017-12-21 | |||
| US6450081B1 | 2002-09-17 | |||
| JP2014122510A | 2014-07-03 |
Other References:
See also references of EP 3848515A4
Attorney, Agent or Firm:
KAICHI IP (JP)
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