| 摘要 |
<p>The device comprises a compression spring (12) mounted between the tension sleeve (7) and the intermediate ring (10,11). The intermediate ring is rotatable relative to the tension sleeve (7) restricted according to the pitch of the compression spring. The locking member (16) on the intermediate ring (10,11) in its locking position biases the chuck body (1) so that the body and the intermediate ring are blocked relative to each other against the direction of rotary tension. Two stops set on the tension sleeve and/or on the intermediate ring restrict the relative rotation between the tension sleeve and the intermediate ring thus restricting the pitch of the compression spring. <IMAGE></p> |
