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Patent Searching and Data


Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2021/065952
Kind Code:
A1
Abstract:
In the present invention, an estimated speed for an arm cylinder to be used for controlling range restriction is calculated on the basis of a first condition that presets the relationship between the control input to an operation lever 1a, 1b and an estimated speed for an arm cylinder 6 if the control input to an operation lever 1a, 1b corresponding to a boom cylinder 5 is less than or equal to the control input to the operation lever 1a, 1b corresponding to the arm cylinder 6; and the estimated speed for the arm cylinder 6 used for controlling range restriction is calculated to be a speed greater than the estimated speed of the arm cylinder 6 that was calculated on the basis of the first condition if the control input to the operation lever 1a, 1b corresponding to the boom cylinder 5 is greater than the control input to the operation level 1a, 1b corresponding to the arm cylinder 6. Thus, the behavior of a work device can be stabilized.

Inventors:
AKITA TAROU (JP)
KOBAYASHI TAKAHIRO (JP)
NARAZAKI AKIHIRO (JP)
ITO MASAMICHI (JP)
Application Number:
PCT/JP2020/037016
Publication Date:
April 08, 2021
Filing Date:
September 29, 2020
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/22
Domestic Patent References:
WO2019180798A12019-09-26
WO2019123511A12019-06-27
WO2015186180A12015-12-10
Attorney, Agent or Firm:
KAICHI IP (JP)
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