Excavating – Ditcher – Condition responsive
Patent
1996-06-05
1998-04-07
Melius, Terry Lee
Excavating
Ditcher
Condition responsive
701 50, 414699, E02F 502
Patent
active
057350655
ABSTRACT:
In an area limiting excavation control system for construction machines such as hydraulic excavators, excavation is smoothly and efficiently carried out within a limited area by setting an area beforehand where a front attachment (1A) is movable, calculating the position and posture of the front-attachment (1A) by a control unit (9) based on signals from angle sensors (8a) to (8c), calculating a limit value of the component of the boom-dependent bucket tip speed vertical to the boundary of the set area so that when the front attachment is inside the set area near the boundary thereof, the moving speed of the front attachment in the direction vertical to the boundary of the set area is restricted, and when the front attachment is outside the set area, it is returned to the set area, and modifying a boom operation signal so as to prevent the boom-dependent bucket tip speed from exceeding the limit value.
REFERENCES:
patent: 5178510 (1993-01-01), Hanamoto et al.
patent: 5446980 (1995-09-01), Rocke
patent: 5479729 (1996-01-01), Eslambolchi
patent: 5488787 (1996-02-01), Aoyagi et al.
patent: 5490081 (1996-02-01), Kuromoto et al.
patent: 5535532 (1996-07-01), Fujii et al.
Adachi Hiroyuki
Fujishima Kazuo
Haga Masakazu
Watanabe Hiroshi
Yamagata Eiji
Batson Victor
Hitachi Construction Machinery Co. Ltd.
Melius Terry Lee
LandOfFree
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