HYDRAULIC OPERATION CIRCUIT FOR WORKING MACHINE

PROBLEM TO BE SOLVED: To easily perform the switching of pilot line without having the fare of an erroneous connection in front recombination and improve the safety in a working machine having a body to which a long front and a short front can be recombined. SOLUTION: In the assembled state of a lon...

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Bibliographic Details
Main Authors TAMIYA HIDEO, HARA SEIICHIRO
Format Patent
LanguageEnglish
Published 19.08.1997
Edition6
Subjects
DREDGING
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
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Summary:PROBLEM TO BE SOLVED: To easily perform the switching of pilot line without having the fare of an erroneous connection in front recombination and improve the safety in a working machine having a body to which a long front and a short front can be recombined. SOLUTION: In the assembled state of a long front, a pedal type pilot valve 30 is used as the operating means of an intermediate arm cylinder 9 for rotating an intermediate arm to a boom. In the assembled state of a short front, the arm is rotated to the boom by the intermediate arm cylinder 9, and a lever type pilot valve 20 for arm is used as the operating means of the intermediate arm cylinder 9. A manual switching valve 40 for switching pilot circuits is provided between the pedal type pilot valve 30 for intermediate arm and the lever type pilot valve 20 for arm, and an arm cylinder control valve 23 and an intermediate arm cylinder control valve 34.
Bibliography:Application Number: JP19960051004