Chucks or sockets – Radially reciprocating jaws – Wedge actuated
Patent
1992-10-05
1994-06-14
Eley, Timothy V.
Chucks or sockets
Radially reciprocating jaws
Wedge actuated
279123, B23B 3116
Patent
active
053203658
ABSTRACT:
A precision chuck has a chuck body, top jaws movable radially with respect to a center axis for gripping and releasing a workpiece, master jaws slidably mounted in recesses in the chuck body for radial movement with respect to the center axis and fixedly connected to the respective top jaws, jaw actuators movable linearly parallel to the center axis having inclined cam surfaces slidingly engaged with corresponding surfaces on the master jaws, and an air-operated piston or power bar for moving the jaw actuators. Each of the jaw actuators is positioned at the middle of a respective master jaw and has a pair of spaced-apart actuator leaves engaging opposite sides of the width of the master jaw, thereby applying a balanced driving force to the master jaw without torquing. Further, an improved mounting employing a combination of threaded screw and concentric tubular pin is used to connect the top jaw to the master jaw. Particularly for small-diameter chucks where the mounting area on the master jaw is restricted, the improved mounting takes up a minimum of space so as to allow two screw/pin combinations to be used. The tubular pin can have collet-like slits at an upper part thereof to adjust for any misalignment during jaw assembly.
REFERENCES:
patent: 4966375 (1990-10-01), Rohm
patent: 5158307 (1992-10-01), Toyano et al.
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