| 摘要 |
A chuck body is formed with angled guides holding respective jaws. A tightening ring rotatable about the axis on the chuck body has a screwthread meshing with toothed edges of the jaws so that rotation of the ring in one direction moves the jaws axially forward and radially together and opposite rotation moves the jaws axially rearward and radially apart. A spring washer is rotatable about the axis on the body between the tightening ring and the rear jaw faces. Rearwardly directed jaw faces axially rearwardly engage and press the washer toward the tightening ring and coupling formations on the washer and ring angularly lock the washer to the ring when the washer is pressed axially rearward by the faces. Stops on the washer can engage the jaws for permitting only limited relative angular movement of the washer and jaws when the faces are pressed axially rearward against the washer. |
