Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/189681
Kind Code:
A1
Abstract:
This work machine comprises a flow rate control valve as a flow rate control mechanism that controls the flow rate of pressure oil from a hydraulic pump to a hydraulic actuator via a first control valve. When pressure oil is supplied to the hydraulic actuator only from an accumulator, a control device for the work machine drives a second control valve so as to connect the meter-in side of the hydraulic actuator to the accumulator, drives the first control valve so as to connect the meter-out side of the hydraulic actuator to a tank, and drives the flow rate control mechanism so as to block the flow of pressure oil from the hydraulic pump to the hydraulic actuator via the first control valve.
Inventors:
HIJIKATA SEIJI (JP)
TSURUGA YASUTAKA (JP)
HOSHINO MASATOSHI (JP)
FURUKAWA SHOU (JP)
YAGISAWA RYOU (JP)
TSURUGA YASUTAKA (JP)
HOSHINO MASATOSHI (JP)
FURUKAWA SHOU (JP)
YAGISAWA RYOU (JP)
Application Number:
PCT/JP2023/010452
Publication Date:
October 05, 2023
Filing Date:
March 16, 2023
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/22; F15B11/00; F15B11/04; F15B11/042; F15B11/044
Domestic Patent References:
| WO2018061165A1 | 2018-04-05 | |||
| WO2019198579A1 | 2019-10-17 | |||
| WO2018061165A1 | 2018-04-05 |
Foreign References:
| JPS639359U | 1988-01-21 | |||
| JPH09158248A | 1997-06-17 | |||
| JPH09125465A | 1997-05-13 |
Attorney, Agent or Firm:
KAICHI IP (JP)
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