| 摘要 |
The chuck clamps a workpiece on a clamping axis eccentric to the rotation axis of the chuck. The spacing between the rotation axis and the clamping axis parallel to it can be varied along a radial axis spacing line going through the rotation axis. One jaw has a clamping surface which intersects the axis spacing plane going through the rotation axis on the axis spacing line perpendicular to the axis spacing line and is adjustable along the axis spacing line. The other jaws opposite this one jaw are adjustably mounted in guides inclined symmetrically about the axis spacing plane and are jointly centrally drivable. The first jaw and both other jaws are adjustable independently of each other. Each of the other jaws has a planar clamping surface perpendicular to its guide direction. The first jaw which does not participate in the clamping process exists to change the axis spacing. It is formed as a revolving disk which is rotatably mounted in the chuck body with the revolving disk axis parallel to the rotation axis, is drivable stepwise in the rotation direction and can be fixed in a plurality of different rotary positions. A plurality of clamping surfaces are located at several places along the circumference of the revolving disk with radial spacing from the revolving disk axis. These clamping surfaces are correlated with the allowed rotary positions of the revolving disk so that one of the clamping surfaces can be positioned opposite the jaws guided in the inclined guides in each rotary position. |
