Arrangement for a telescope feeder of a rock-drilling machine

Details Arrangement for a telescope feeder of a rock-drilling machine Arrangement for a telescope feeder of a rock-drilling machine

E - Fixed Constructions

21

B

E21B 15/00 (2006.01) E21B 3/00 (2006.01) E21B 7/02 (2006.01) E21B 19/08 (2006.01) E21B 19/086 (2006.01)

Patent

CA 2225050

An arrangement for a telescope feeder of a rock-drilling machine, comprising two telescopic portions (3a, 3b), between which is connected an extension cylinder (6) and whereby the rock-drilling machine (1) moves along one telescopic portion (3a). The extension cylinder (6) comprises a separate adjusting piston, which is mounted movably around the piston rod (6b) so that it can move irrespective of the piston (6a) of the extension cylinder (6). Three cylinder spaces (8a to 8c) are thus formed inside the extension cylinder (6) and to each cylinder space is connected a separate channel (9a to 9c) for pressure medium, so that the adjusting piston (7) can be displaced to a desired position.

Cet agencement pour le dispositif télescopique d'amenée d'une perforatrice de rochers comprend deux parties télescopiques (3a, 3b) entre lesquelles est monté un cylindre d'extension (6), la perforatrice (1) se déplaçant le long d'une des parties télescopiques (3a). Le cylindre d'extension (6) comprend un piston séparé d'ajustement monté mobile autour de la tige (6b) de piston de façon à pouvoir se déplacer indépendamment du piston (6a) du cylindre d'extension (6). Trois chambres de cylindre (8a à 8c) se forment ainsi dans le cylindre d'extension (6) et un canal séparé d'amenée (9a à 9c) de milieu sous pression est relié à chaque chambre de cylindre. On peut ainsi déplacer le piston d'ajustement (7) jusqu'à la position voulue.

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