Device for imparting a rotary driving motion to tools

B - Operations – Transporting – 25 – D

Patent

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Details

B25D 17/08 (2006.01)

Patent

CA 2180542

Proposed is a device for use on hand held machine tools to impart a rotary driving motion to impact and/or drilling tools, there being at least three drivers on the tool shaft (11) and the tool carrier (10), these consisting of grooves (17, 18, 22) that extend axially to the end of the shaft and driver splines (19, 20, 23) of the tool carrier (10) that fit therein, and which incorporates an axial locking mechanism consisting of a recess (21) in the tool shaft (11) that extends axially and is closed to the shaft end, and a locking body (16) in the tool carrier (10) that fits therein. Two of the drivers (17, 19 and 18, 20) are at least partially opposite each other. In order to achieve even torsional loading of the tool shaft (11) and the tool carrier (10), the drivers that start from the axial locking mechanism and which are arranged one behind the other on the periphery of the shaft are arranged with their driver flanks on a peripheral angle of > 180° and < 240°.

La présente invention concerne un dispositif à utiliser sur des machines-outils manuelles pour l'entraînement en rotation d'outils à percussion et/ou de perçage. Sur la tige d'outil (11) et le logement d'outil (10) sont disposés au moins trois systèmes d'entraînement en rotation constitués par des rainures (17, 18, 22) se terminant axialement à l'extrémité de la tige et par des réglettes d'entraînement en rotation (19, 20, 23) du logement d'outil (10) s'engageant dans ces rainures, ainsi qu'un verrouillage axial qui se compose d'un évidement axial (21) dans la tige d'outil (11), fermé vers son extrémité, et d'un corps de verrouillage (16) qui s'y engage et se trouve dans le logement d'outil (10), deux entraînements en rotation (17, 19 et 18, 20) se faisant face au moins partiellement. Pour que la tige d'outil (11) et son logement (10) soient sollicités par un couple uniforme, les entraînements en rotation situés l'un derrière l'autre tout autour de la tige à partir du verrouillage axial sont disposés de telle sorte que leurs flancs d'entraînement en rotation forment un angle périphérique de > 180 DEG , < 240 DEG .

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