| 摘要 |
A chuck assembly for a tool bit includes a hollow chuck body which has a front end formed with a locking portion and which is formed with at least one radial opening therethrough, a cylindrical push member which is disposed slidably in the chuck body and which is formed with an external screw thread, a hollow truncated cone-shaped seater which is disposed in front of the push member and which is formed with a plurality of angularly spaced and longitudinally extending slits, a plurality of elongated clamping members which extend slidably and respectively into the slits and which have rear ends connected to the push member, a hollow truncated cone-shaped front cap which encloses the seater and which has a rear end connected to the locking portion of the chuck body, and a drive ring which is provided rotatably around the chuck body and which is formed with an internal screw thread that meshes with the external screw thread of the push member.
|
