Device for imparting a rotary driving motion to tools

Details Device for imparting a rotary driving motion to tools Device for imparting a rotary driving motion to tools

B - Operations, Transporting

25

D

B25D 17/08 (2006.01)

Patent

CA 2181181

The proposal is for a device on hand machine tools for the rotary drive of percussion and/or drilling tools having at least three locking sections and an axial lock uniformly distributed around the circumference of the tool spindle (11) and chuck (13) of a tool holder (10). The locking sections consist of axial recesses (17, 19, 21) on the tool spindle (11) running axially towards the spindle end and engaging axial projections (18, 20, 22) around the circumference of the chuck (13). To prevent jerky overload, it is proposed to design the locking sections (21, 22) in the circumferential region opposite the axial lock in such a way that their recess (21) and projection (22) run as a chord to the circumference of the tool spindle (11) or the chuck (13) of the tool holder (10).

La présente invention propose un dispositif à utiliser sur des machines-outils manuelles pour entraîner en rotation des outils à percussion et/ou de perçage; ce dispositif comporte au moins trois systèmes d'entraînement en rotation et un verrouillage axial uniformément répartis tout autour de la tige d'outil (11) et du perçage de fixation (13) d'un porte-outil (10). Ces entraînements consistent en évidements (17, 19, 21) qui se terminent axialement à l'extrémité de la tige d'outil (11) ainsi qu'en saillies axiales (18, 20, 22) coopérant avec eux tout autour du perçage de fixation (13). Pour éviter des surcharges par à-coups, cette invention propose de concevoir l'entraînement en rotation (21, 22) qui est situé dans la zone de circonférence en face du verrouillage axial de telle façon que l'évidement (21) et la saillie correspondante (22) se terminent en forme de corde sur au moins un grand côté jusqu'au bord de la tige d'outil (10) ou du perçage de fixation (13) du porte-outil (10).

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