Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
WORK MACHINE AND METHOD FOR CONTROLLING WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2021/014900
Kind Code:
A1
Abstract:
This work machine is provided with: work equipment; a hydraulic cylinder that operates the work equipment by means of hydraulic oil; a hydraulic pump that supplies the hydraulic oil to the hydraulic cylinder via a hydraulic circuit; a relief valve that can set the relief pressure of the hydraulic circuit to a first setting pressure or a second setting pressure higher than the first setting pressure; a state determination unit that determines whether the control state of the work equipment is a drilling state; a detection unit that detects the speed of the work equipment and/or the hydraulic oil pressure of the hydraulic circuit; and a relief pressure changing unit that changes the relief pressure of the relief valve from the first setting pressure to the second setting pressure on the basis of the detected value of the hydraulic oil pressure of the hydraulic circuit and/or the speed of the work equipment when the control state of the work equipment is the drilling state.

More Like This:
Inventors:
KONDA TOMOKI (JP)
OI TAKESHI (JP)
SHIMADA KENJIRO (JP)
OHIWA KENJI (JP)
Application Number:
PCT/JP2020/025654
Publication Date:
January 28, 2021
Filing Date:
June 30, 2020
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
E02F9/22
Domestic Patent References:
WO2017138070A12017-08-17
Foreign References:
JP2018145685A2018-09-20
JP2012086617A2012-05-10
JPH11247233A1999-09-14
JP3779488B22006-05-31
JPH1136376A1999-02-09
JP2010156134A2010-07-15
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
Download PDF: