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Patent Searching and Data


Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2021/059749
Kind Code:
A1
Abstract:
In a hydraulic excavator comprising a main controller that can execute area restriction control, the main controller calculates an action speed Vfx of a front work device in a vehicle body coordinate system and a movement speed (dragging speed) Vu of a vehicle body in a gravity coordinate system and, if the occurrence of dragging is detected during the execution of the area restriction control on the basis of the calculated action speed Vfx of the front work device 2 and the calculated movement speed Vu of the vehicle body, corrects the direction of a calculated target speed vector Vt to a direction leading upwards away from a construction target surface.

Inventors:
SUZUKI YUSUKE (JP)
TANAKA HIROAKI (JP)
NAKANO HISAMI (JP)
SAKAMOTO HIROSHI (JP)
NARAZAKI AKIHIRO (JP)
Application Number:
PCT/JP2020/029704
Publication Date:
April 01, 2021
Filing Date:
August 03, 2020
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F3/43; E02F9/20; E02F9/22; E02F9/26
Foreign References:
JP2019007175A2019-01-17
JP2018003282A2018-01-11
US20140178166A12014-06-26
Attorney, Agent or Firm:
KAICHI IP (JP)
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