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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Main Authors | , |
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Format | Patent |
Language | English |
Published |
26.10.1999
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Summary: | 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. |
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Bibliography: | Application Number: JP19980104303 |