| 摘要 |
A self-centering steady rest (1) for clamping a workpiece (4) on a turning machine, with three holding elements (5, 6, 7) mounted in a housing (2) and held adjustably in a common plane, the two outer holding elements (5, 7) being configured as swivelling angled levers supported in the housing (2) and in a mirror-image arrangement with one another, and the middle holding element (6) is guided in the housing (2) by means of middle piece (8) in a driveable connection with a drive unit (61) to be axially moveable in the direction of the workpiece (4), with control surfaces (9) being provided on the middle piece (8) wherein the two outer holding elements (5, 7) interact with the control surfaces (9) to achieve clamping movements of the three holding elements (5, 6, 7) and are performed by means of a drive device (21, 61) which is operated electrically, and which performs rotational movement that is converted into an axial advance and return movement performed by the middle piece (8). |
