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Patent Searching and Data


Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2019/130898
Kind Code:
A1
Abstract:
Provided is a work machine capable of preventing cavitation when a reverse lever operation, which issues an instruction to swing in a direction opposite to a swing direction during swinging deceleration, is performed in a hydraulic closed circuit system. When a swing direction corresponding to swinging speed detected by a speed sensor and a swing direction corresponding to an operation of a swing operation lever are different, a controller controls the rate of a flow supplied from a double-incline hydraulic pump to a swing motor so as to be less than a pump flow rate corresponding to a manipulated variable of the swing operation lever.

Inventors:
KAI TAKAMASA (JP)
SAITOU TEPPEI (JP)
HIRAKU KENJI (JP)
SHIMIZU JURI (JP)
Application Number:
JP2018/042514
Publication Date:
July 04, 2019
Filing Date:
November 16, 2018
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACH CO (〒1100015, JP)
International Classes:
F15B11/02; E02F9/22; F15B11/08
Domestic Patent References:
WO2015198644A12015-12-30
Foreign References:
JP2017106251A2017-06-15
JP2014005679A2014-01-16
JP2015075171A2015-04-20
JP2015074531A2015-04-20
Attorney, Agent or Firm:
KAICHI IP (〒1030022, JP)
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