Fast-release power-chuck assembly for a lathe

Chucks or sockets – With fluid-pressure actuator – Socket type

Patent

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Details

92 24, 92 27, B26C 500

Patent

active

045823316

ABSTRACT:
A power chuck assembly has a lathe spindle extending along and rotatable about an axis and having axially opposite front and rear ends. An axially displaceable actuator rod extends at the axis through the spindle and has front and rear rod ends at the respective spindle ends. This rod is rotatable about the axis between two angularly offset end positions. A coupling head secured to the front spindle end has a plurality of bolts displaceable radially between inner and outer positions. A chuck provided with an axially rearwardly projecting annular flange engageable over the head is formed with at least one radially but not axially open recess in which the bolts are engageable in the outer positions thereof. Actuators are connected to the bolts for displacing them from the inner to the outer positions so that, when the chuck is fitted over the coupling head, the bolts engage in the recess and axially lock the chuck on the coupling head. An actuating element is axially displaceable in the chuck for gripping and releasing a workpiece, normally by radially displacing jaws on the chunk. Interengageable coupling formations on the front rod end and on the actuating element are axially engageable with each other for axially coupling the rod to the element in one angular end position of the spindle and axially unengageable with each other in the other angular end position for axially decoupling the rod and element. A linear actuator is connected between the rear spindle and rod ends for relatively axially displacing the spindle and rod and thereby axially displacing the actuating element of a chuck engaged on the head.

REFERENCES:
patent: 2811136 (1957-10-01), Westcott et al.
patent: 3762264 (1973-10-01), Scott
patent: 3893371 (1975-07-01), Frazier
patent: 4411440 (1983-10-01), Becker

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