Coupling arrangement for coupling rock drill shank

Details Coupling arrangement for coupling rock drill shank Coupling arrangement for coupling rock drill shank

E - Fixed Constructions

21

B

E21B 6/00 (2006.01) B25D 17/08 (2006.01) F16D 3/06 (2006.01) F16D 3/44 (2006.01)

Patent

CA 2685059

The invention relates to a coupling arrangement for coupling a drill shank (3) of a rock drill unrotatably but axially movably. The coupling arrangement comprises power transmission members (8; 8a, 8b) between the surfaces of the drill shank (3) and the rotation bushing (6), which transmission members rotate along the surfaces, as the drill shank (3) moves longitudinally to the rotation bushing (6), and transmit the rotation torque from the rotation bushing (6) to the drill shank (3).

L'invention concerne un dispositif d'accouplement pour coupler la queue de foret (3) d'une perforatrice de façon mobile axialement mais non mobile en rotation. Le dispositif d'accouplement comprend des éléments de transmission de puissance (8; 8a, 8b) entre les surfaces de la queue de foret (3) et de la douille de rotation (6), lesquels éléments de transmission tournent le long des surfaces lorsque la queue de foret (3) se déplace longitudinalement par rapport à la douille de rotation (6), et transmettent le couple de rotation de la douille de rotation (6) à la queue de foret (3).

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