HYDRAULIC PILOT CONTROL DEVICE

PROBLEM TO BE SOLVED: To restrain a swing jerking only in such a state as the swing jerking causes trouble without hurting an operator's control sense of lever operation in such a state as the swing jerking causes no trouble in a hydraulic pilot control device. SOLUTION: A hydraulic pilot contr...

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Bibliographic Details
Main Authors SATAKE HIDETOSHI, KASUYA HIROTSUGU
Format Patent
LanguageEnglish
Published 26.10.1999
Edition6
Subjects
DREDGING
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
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Abstract PROBLEM TO BE SOLVED: To restrain a swing jerking only in such a state as the swing jerking causes trouble without hurting an operator's control sense of lever operation in such a state as the swing jerking causes no trouble in a hydraulic pilot control device. SOLUTION: A hydraulic pilot control device is equipped with reaction cylinders 7a and 7b providing reaction in the opposite direction to the control direction of a control lever 5 with the control lever 5, an electromagnetic proportional regulator 8 for reducing the pressure of hydraulic oil supplied to the reaction cylinders 7a and 7b and angle sensors 81a-81c for detecting every turning angle of boom 31a, arm 31b and bucket 31c. Moment of inertia for a front device 31 is calculated from detection signals of the angle sensors 81a-81c, objective reaction of the reaction cylinders 7a and 7b is calculated from the moment of intertia, and a controller 80 outputting the objective reaction to the electromagnetic proportional regulator 8 is provided to the hydraulic pilot control device.
AbstractList PROBLEM TO BE SOLVED: To restrain a swing jerking only in such a state as the swing jerking causes trouble without hurting an operator's control sense of lever operation in such a state as the swing jerking causes no trouble in a hydraulic pilot control device. SOLUTION: A hydraulic pilot control device is equipped with reaction cylinders 7a and 7b providing reaction in the opposite direction to the control direction of a control lever 5 with the control lever 5, an electromagnetic proportional regulator 8 for reducing the pressure of hydraulic oil supplied to the reaction cylinders 7a and 7b and angle sensors 81a-81c for detecting every turning angle of boom 31a, arm 31b and bucket 31c. Moment of inertia for a front device 31 is calculated from detection signals of the angle sensors 81a-81c, objective reaction of the reaction cylinders 7a and 7b is calculated from the moment of intertia, and a controller 80 outputting the objective reaction to the electromagnetic proportional regulator 8 is provided to the hydraulic pilot control device.
Author KASUYA HIROTSUGU
SATAKE HIDETOSHI
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RelatedCompanies HITACHI CONSTR MACH CO LTD
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Snippet PROBLEM TO BE SOLVED: To restrain a swing jerking only in such a state as the swing jerking causes trouble without hurting an operator's control sense of lever...
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SubjectTerms DREDGING
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SOIL SHIFTING
Title HYDRAULIC PILOT CONTROL DEVICE
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