E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 3/02 (2006.01)
Patent
CA 2178596
A rock or ground-drilling machine includes a gear housing (14) in which there is journalled a shaft (31) which surrounds a drill string (23) m the manner of a sleeve and which is affixed to the drill string by means of a chuck (7) connected to the shaft (31). The chuck is operated by means of pressure fluid delivered to the chuck (27) through the medium of a commutator (36) acting between the gear housing (14) and the shaft (31). The shaft (31) is journalled in the gear housing (14) by means of one single rolling bearing (39). The commutator (36) lies resiliently against the gear housing (14) and is flexible in response to sideways movement of the shaft (31).
Une excavatrice comporte un carter (14) pour engrenages où est monté sur palier un arbre (31) qui entoure un train de tiges (23) comme un manchon et qui est fixé à ce train par un mandrin (7) raccordé à cet arbre (31). Ce mandrin est actionné par un fluide de pression qui lui est amené au travers d'un commutateur (36) intercalé pour agir entre le carter (14) pour engrenages et l'arbre (31) qui est monté dans ce carter sur un seul palier (39) tournant. Le commutateur (36) prend appui de manière souple contre le carter (14) pour engrenages et se révèle flexible en réaction aux mouvements latéraux de l'arbre (31).
Jonsson Gunnar
Nordqvist Ulf
Asquith Anthony
Craelius Ab
LandOfFree
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