| 摘要 |
A chuck includes a generally cylindrical body 20 having a nose section 22 and a tail section 24. The tail section is adapted to rotate with the drive shaft, and the nose section has an axial bore 26 formed therein. A driver 30 is axially movably disposed about the body. A generally cylindrical sleeve 60 is rotatably mounted about the body. A grip is mounted in the body in communication with the axial bore 26 and in operative communication with the driver. The driver 30 is in communication with the sleeve 50 and the body 20 so that, in a first state of the chuck, rotation of the sleeve with respect to the body in a closing direction moves the grip toward the axis of the axial bore and so that, in a second state of the chuck, the driver is axially reciprocal with respect to the sleeve and the body and allows quick movement of the grip. |
