Excavating – Cable-operated – Boom-type
Patent
1993-06-21
1995-04-25
Taylor, Dennis L.
Excavating
Cable-operated
Boom-type
37384, 37394, 37395, 36416701, 36442407, 364506, 414694, 414699, 414718, 414728, B66C 2300, E02F 346
Patent
active
054087678
ABSTRACT:
An excavation controlling apparatus which can effect precise driving control off a dipper in accordance with an actual operation condition with a simple structure of a low cost. A dipper handle extension instruction calculation section calculates a dipper handle extension instruction signal from a difference between a moment upper limit value set by a moment limit value setting section and a working moment calculated by a working moment calculation section, and causes a dipper handle driving motor output controlling apparatus to control a sliding driving operation of a dipper handle in accordance with the dipper handle extension instruction signal. A hoisting operation instruction calculation section corrects a hoisting operation reference instruction set by a hoisting operation reference instruction setting section with the moment upper limit value and a hoisting operation instruction correction amount calculated from the working moment. A hoisting motor output controlling apparatus performs hoisting control based on the thus corrected hoisting operation instruction.
REFERENCES:
patent: 3144146 (1964-08-01), Strickland, Jr.
Arimitsu Hideo
Hazama Hiroyoshi
Nakamura Kengo
Chop Andrea
Kabushiki Kaisha Kobe Seiko Sho
Taylor Dennis L.
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