Mounting of a rotatable chisel in mining machinery

Details Mounting of a rotatable chisel in mining machinery Mounting of a rotatable chisel in mining machinery

E - Fixed Constructions

21

C

E21C 35/197 (2006.01) E21C 35/18 (2006.01)

Patent

CA 2360682

The invention relates to a solution for mounting a rotatable chisel in mining machinery. According to the invention, the shaft of the chisel comprises a projection configured as a journal that is preferably slanted on both sides with faces and. A friction ring provided with faces also on both sides is fitted on the journal. After inserting the chisel into the chisel retainer, the friction ring rests with the outer surface thereof against the hole of the chisel retainer. The diameter (D2) of the journal is smaller than the diameter (D1) of the shaft, and the final edges of the friction ring are arranged in the recess on one side and in the groove on the other side. The invention is primarily for use in combined machinery for extracting coal and in road construction machinery.

L'invention concerne une solution pour le montage d'un trépan qui réside dans le fait que la tige (6) du trépan (4) comporte une saillie servant de tenon (7) et présentant, de préférence, sur ses deux côtés, des faces (9 et 10) inclinées. Sur ledit tenon (7) est placée une bague de friction (23) qui est elle-même pourvue, sur ses deux côtés, de faces (25). La bague de friction (23) repose, après insertion du trépan dans le porte-trépan (1), contre les parois du trou (2) du porte-trépan (1), avec sa surface enveloppe (24). Le diamètre (D2) du tenon (7) est plus petit que le diamètre (D1) de la tige (6) et les arêtes terminales (30) de la bague de friction (23) sont placées, sur un côté, dans la cavité (11), et, de l'autre côté, dans la rainure (12). Cette invention est destinée principalement aux machines combinées pour l'extraction du charbon et aux machines pour la construction des routes.

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