| 摘要 |
The device comprises clamping levers (2, 3 and 4) pivotably mounted on a base plate (1), of which the clamping levers (2) and (3) are arranged coaxially to one another on a pivot pin (5), while the other clamping lever (4) is mounted on a second pivot pin (6) which is at the same distance from the centre (11) of the device as the pivot pin (5). The bearing surfaces (33, 34, 35) with which the clamping levers (2, 3, 4) seize a workpiece (39) are designed in such a way that the perpendicular (39, 40, 41) to the respective tangent (42, 43, 44) at the contact point (36, 37, 38) between bearing surface and workpiece runs through the centre (11) of the device. In this way, the workpiece is always thrust into the centre and thus centred during the clamping operation irrespective of its diameter. On account of the arrangement of the clamping levers, it is possible to push in workpieces transversely to the chuck axis despite the concentric clamping operation. …<IMAGE>… |
