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Patent Searching and Data


Title:
HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2019/163990
Kind Code:
A1
Abstract:
This hydraulic system is provided with: a running motor; a running pump connected to the running motor to form a closed-loop and driven by an engine; a working pump that is driven by the engine, suctioning suctions hydraulic oil from a tank through a suction line provided with a check valve, and supplying supplies the hydraulic oil to a working hydraulic actuator through a discharge line; a switching valve connected to the discharge line through a pressure accumulation line and connected through a pressure discharge line to a downstream part of the suction line downstream of the check valve in the suction line; and an accumulator connected to the switching valve through a relay line, wherein the switching valve is switched between a neutral position at which the pressure discharge line, the pressure discharge line, and the relay line are blocked, a pressure accumulation position at which the pressure accumulation line is communicated with and the relay line communicate with each other, and a pressure discharge position at which the relay line is communicated withand the pressure discharge line communicate with each other.

Inventors:
KONDO, Akihiro
KUSUMOTO, Ryosuke
NAKAYAMA, Yuki
Application Number:
JP2019/007091
Publication Date:
August 29, 2019
Filing Date:
February 25, 2019
Export Citation:
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Assignee:
KAWASAKI JUKOGYO KABUSHIKI KAISHA (1-1 Higashikawasaki-cho 3-chome, Chuo-ku Kobe-sh, Hyogo 70, 〒6508670, JP)
International Classes:
F16H61/4096; E02F9/22; F15B11/02; F15B11/028; F15B21/14
Foreign References:
JP2013117098A2013-06-13
JP2001324014A2001-11-22
JP2016148392A2016-08-18
Attorney, Agent or Firm:
PATENT CORPORATE BODY ARCO PATENT OFFICE (3rd Fl, Bo-eki Bldg. 123-1, Higashimachi, Chuo-ku, Kobe-sh, Hyogo 31, 〒6500031, JP)
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