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US 4,810,019 AGranted
Mechanically operated collet chuck for gripping round objects
OwnerEberhard Brucherinventor
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OwnerEberhard Brucherinventor
Estimating the term…
Mechanically operated collet chuck for gripping round objects. Especially in automatic, program-controlled installations for the successive machining of round workpieces, a centered gripping of the round objects, which are changing in diameter, is important. The centering error occurring in case of a collet-carrying machine which remains stationary is compensated for by means of link quadrilaterals (3, 8, 10, 12) which latter cause collet jaws (9) pivotably mounted to the front ends of the collet arms (4) and forming four contact points to pivot with respect to the collet arms (4) in such a way that the contact points or contact lines come into contact with the round object (1) simultaneously, without a change in position of the machine or of the round object. The special structure of the collet chuck simplifies program control of the machining unit since the change in diameter undergone by the round object (1) is taken into account in a rugged and purely mechanical fashion by the collet which occupies only a small amount of space.
Mechanically operated collet chuck for gripping round objects, with collet arms uniformly pivotable on a collet head, the front ends of these collet arms engaging at two different circumferential points of the round object, characterized in that collet jaws (9) are pivotably mounted to the front ends of the collet arms (4) and can be pivoted by way of respectively one link quadrilateral (3, 8, 10, 12) perforce with respect to the collet arms (4) in such a way that, in every opening position of the same, the mid-perpendicular (14) on the connecting lines (15) between the contact points of the collet jaws (9) extends through the center (M) of the round object (1) to be gripped, i.e. the four contact points or contact lines of the collet jaws (9), with the position of the round object (1) being unchanged and with the gripping or setting-down position of the machine being unchanged, come into contact with the round object (1) simultaneously.
Dependencies are inferred from the claim text.