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Title:
WORK MACHINE HYDRAULIC TRANSMISSION
Document Type and Number:
Japanese Patent JP2017096033
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a work machine hydraulic transmission, for a work machine mounted with an exhaust gas treatment device using a reducing agent, which enables an emergency evacuation measure to be taken on an occurrence of serious abnormality in the exhaust gas treatment device causing engine output restriction while reliably blocking hydraulic drive of the work machine.SOLUTION: A hydraulic transmission comprises: a hydraulic pump 52; a hydraulic actuator 54; a control valve 56 which changes a flow rate of hydraulic oil from the hydraulic pump 52 to the hydraulic actuator 54 by receiving input of control pressure; a control pressure input switching section 66 which can switch between a permission state to permit the input of the control pressure and a blocking state to block the input thereof; an input switch control section 40; and a restoration command input section. The input switch control section 40 has a pump capacity control section 42 which controls pump capacity of the hydraulic pump 52. The pump capacity control section 42 puts the control pressure input switching section 66 into the blocking state when an engine is in a specific output restriction state and into the permission state when a restoration command is input.SELECTED DRAWING: Figure 2

Inventors:
SASAI SHINTARO
TERASAKA JOJI
TSURUMI TOSHIKI
KIMITANI TSUKASA
USUMOTO SHOTA
Application Number:
JP2015231210A
Publication Date:
June 01, 2017
Filing Date:
November 27, 2015
Export Citation:
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Assignee:
KOBELCO CONTSTRUCTION MACHINERY LTD
International Classes:
E02F9/00; B66C13/20; B66C23/40; E02F9/20; F01N3/08; F01N3/20; F15B11/02; F15B11/08; F15B20/00
Domestic Patent References:
JP2015007420A2015-01-15
JP2009127521A2009-06-11
JP2007321671A2007-12-13
JP2014190317A2014-10-06
Foreign References:
WO2013105372A12013-07-18
WO2013105423A12013-07-18
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Muramatsu Toshiro