Metabowerke Gmbh & Co.

Heinz Deuschle

Manfred Schulz

Andreas Braun

A drill chuck includes clamping jaws guided in openings inclined toward each other in a chuck body and displaced via a manually rotatable clamping sleeve and a blocking sleeve, which is axially displaceable and partially rotated in relation to the chuck body. The blocking sleeve can be connected with the clamping sleeve by being displaced into its axial end position. A spring operating in the circumferential direction between the chuck body and the blocking sleeve, which prestresses the blocking sleeve in relation to the chuck body in a direction corresponding to the closing direction of the clamping sleeve is provided. To increase the service life of the drill chuck it is embodied in such a way that the end of the spring on the blocking sleeve side is disposed on a plate- or disk-shaped adjusting disk which encloses the shaft of the chuck body, is interlockingly taken along with the rotation of the blocking sleeve and is axially displaceable on the blocking sleeve, and in such a way that, for limiting the rotation of the blocking sleeve in relation to the chuck body, a cam is provided, which operates between the surface of the shaft of the chuck body and the adjusting disk and is limited by two detents.

Drill chuck

A device for driving a screwdriver spindle has a claw clutch and an over-detent clutch. The two clutches are arranged coaxially to each other and have coupling parts which are displaceable in an axial direction. Upon a first response of the over-detent clutch, the claw clutch is disengaged, a correspondingly axially displaceable coupling part of the claw clutch is then locked in a disengaged position by a disengageable safety which is simply a radially elastically expandable clamping sleeve which is connected to the claw-clutch and has a detent projection which protrudes radially inward. The screwdriver spindle on which the clamping sleeve is arranged has two circumferential grooves for engagement of the detent projection, the axial center-to-center distance of which is greater than the coupling stroke of the claw clutch.

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Oberboihingen, Germany

Heinz Deuschle