| 摘要 |
The power chuck is particularly intended for holding crankshafts. The chuck has a base, a head, and clamping jaws. The head is radially guided with respect to a clamping axis which extends parallel to an axis of rotation. The clamping jaws are connected to a drive piston by way of axially movable wedge members which can be axially displaced in the base. The chuck also has a holding body which is reciprocatingly guided at the base. When considered in transverse direction with respect to its direction of displacement, the holding body has a width which is smaller than the diameter of the base. Parallel thereto and on both sides of the holding body are arranged movably guided counterbalancing elements, and they are each connected by way of a gear wheel in a countercurrent manner to the body. Several clamping jaws are separated into an inner part and an outer part, of which the inner part is guided in the holding body, and the outer part with the wedge member connected to it is guided in the base. Both parts are operatively connected by way of a dovetail slide connection which extends parallel to the direction of displacement of the holding body.
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