| 摘要 |
The device has a tension piece (2) displaceable in the direction of the spindle axis (1') and a likewise displaceable actuating member (3) which is acted upon in the clamping direction of the tension piece (2) by a clamping spring (4) and is supported against its force on the tension piece (2) via clamping wedges (5), for which bearing surfaces (6, 7) inclined towards one another are provided on the tension piece (2) and on the actuating member (3). Furthermore, the clamping wedges (5) can be supported on a supporting sleeve (8), connected to the work spindle (1), in bearing surfaces (9) and are positively guided on the bearing surfaces (6) of the actuating member (3) in such a way that they are carried along by the actuating member (3), even during its displacement against the direction of force of the clamping spring (4), right into a radially inner position relative to the spindle axis (1'). In this position, they can be retracted into the hollow inner space of the supporting sleeve (8) during the further displacement of the actuating member (3) against the direction of force of the clamping spring (4), in the course of which they bear with their radially outer surface (10) against the inner surface (11) of the supporting sleeve (8). <IMAGE> |
