Dragline bucket rigging and control apparatus

E - Fixed Constructions – 02 – F

Patent

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Details

E02F 3/48 (2006.01) E02F 3/46 (2006.01) E02F 3/54 (2006.01) E02F 3/58 (2006.01) E21C 47/02 (2006.01)

Patent

CA 2394782

A large electric dragline having a housing (35) and boom (37) is provided with spaced apart in-line sheaves (34) and (36) at boom point to separate hoist ropes (31) and (32) which are led to the front and rear of bucket (30) respectively. Differential hoist rope control allows accurate and continuous adjustment of the bucket carry angle during all modes of operation. Also described is a computer control system giving continuous accurate control of carry angle by differential hoist rope operation, with manual selection of mode of operation.

Pelle électrique à benne traînante fortement dimensionnée possédant une base (35) et une flèche (37), ainsi que des poulies (34, 36) espacées l'une de l'autre en ligne au niveau d'un point de la flèche afin de séparer des câbles de levage (31, 32) conduits respectivement vers l'avant et l'arrière du godet (30). Une commande différentielle des câbles de levage permet d'effectuer un réglage précis et continu de l'angle de portage du godet pendant tous les modes de fonctionnement. L'invention concerne également un système de commande informatique servant à commander en continu et avec précision l'angle de portage au moyen de différents modes de fonctionnement des câbles de levage, et comportant une sélection manuelle de ce mode de fonctionnement.

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