| 摘要 |
A drill chuck arrangement for connecting a drill bit to a spindle of a drilling machine comprises a spindle member threaded onto the spindle, and a jaw-actuating member mounted at least in part about the spindle member for concentric turning about the latter. A plurality of opposed clamping jaws are movable towards and away from each other in response to the aforementioned concentric turning. The spindle member has a radial bore which receives a portion of an actuating tool having beveled gear means. Upon turning the tool, the beveled gear meshes with a cooperating gear on the jaw-actuating member so as to turn the same relative to the spindle member, and thereby clamp or release a drill bit inserted in between the clamping jaws. A bushing is provided intermediate the spindle member and the jaw-actuating member to prevent binding between these members. |
