| 摘要 |
A selftightening drill chuck has a chuck body having a chuck thread, a chuck sleeve, a plurality of clamp jaws which are guided slidably in the chuck sleeve inclined to the chuck axis and a locking ring on the chuck body which is rotatable between two rotational end positions and is axially slidable and is coupable in the circumferential direction with the clamping sleeve by two tooth rings. The chuck body has a conical surface extending parallel to the feed direction of the clamp jaws on which the chuck thread is located which engages with a transverse gear on each clamp jaw. A spring acts on the locking ring in a rotational direction which corresponds to the opening of the drill chuck. To limit rotation of the locking ring a stop pin fixed on the chuck body can be provided which engages in a cavity of the locking ring. |
