Grease filling arrangement in a cutter for a boring head

Details Grease filling arrangement in a cutter for a boring head Grease filling arrangement in a cutter for a boring head

E - Fixed Constructions

21

B

E21B 10/24 (2006.01)

Patent

CA 2479430

The present invention relates to an arrangement for replenishing lubricating grease in drill cutters that include a conical outer barrel which is rotatable about a shaft disposed centrally in the cutter, wherein there is provided in the cutter shaft a passageway that extends along the shaft from the cutter end of largest diameter and that connects with a transverse passageway which opens into a bearing-accommodating space in said cutter for delivering lubricating grease to said space, and wherein a lubricating nipple is provided on the cutter end wall of largest diameter and functions to allow lubricating grease to be released from said bearing-accommodating space.

L'invention concerne un système d'approvisionnement en graisse lubrifiante dans des fraises de forage (3), lequel système comprend un réservoir extérieur conique (7) pivotant autour d'un arbre (5) disposé au centre de la fraise. L'arbre (5) de la fraise présente une voie de passage (1) qui s'étend le long de l'arbre depuis l'extrémité de la fraise dont le diamètre est le plus grand; cette voie de passage est reliée à une voie de passage transversale (18) s'ouvrant dans un espace (13) de régulation de paliers dans ladite fraise, de manière à acheminer la graisse lubrifiante dans ledit espace (13). Un raccord de graissage (19) est placé sur la paroi d'extrémité de la fraise qui présente le diamètre le plus grand; ce raccord permet une libération de la graisse lubrifiante depuis l'espace (13).

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