| 摘要 |
<p>A self-locking manual tightening drill chuck includes a chuck body, three pawls, an axially located rotating sleeve and a nut. The pawls mesh with the nut via threads. A front annular body is provided in front of the nut, which surrounds the chuck body and can not rotate relative to the chuck body. The back end face of the front annular body is provided with tooth sockets. The rotating sleeve is provided with an intermediate ring that can rotate with the rotating sleeve and slide fore and aft. Said intermediate ring is provided between the nut and the front annular body. The intermediate ring has a locking element that cooperates with the tooth sockets of the front annular body. The front end face of the nut is provided with the configurations that control the disengagement of the locking element of the intermediate ring and the tooth sockets of the front annular body, the configurations that control the engagement of the locking element of the intermediate ring and the tooth sockets of the front annular body and the transition faces between these configurations. The drill chuck has an elastic element that pushes the intermediate rin towards the nut.</p> |
