Hydraulically operated chuck closing mechanism

Details Hydraulically operated chuck closing mechanism Hydraulically operated chuck closing mechanism

1990-03-26

1991-03-26

Schwartz, Larry I.

Chucks or sockets

With fluid-pressure actuator

Socket type

279 50, 279 43, 279 1W, B23B 3120

Patent

active

050022911

ABSTRACT:
In an automatic screw machine two spindles are mounted coaxially one within the other and are keyed together for rotation in unison in the indexing head of the machine. The inner spindle has a collet on one end thereof; the outer spindle is shiftable axially relative to the inner spindle between collet opening and closing positions. A spring, which surrounds the inner spindle at one end thereof, urges a washer on the inner spindle against one end of the outer spindle normally to urge the outer spindle resiliently into a collet closing position. A hydraulic cylinder, which surrounds the outer spindle at the side of washer remote from the spring, contains a piston which is engaged at one side with the washer and at its opposite side communicates with a fluid pressure chamber. To open the collet pressure is applied to the fluid in the chamber, thereby causing the piston to compress the spring and to permit the outer spindle to move to a collet opening position.

REFERENCES:
patent: 4615101 (1986-10-01), Edwards et al.
patent: 4799696 (1989-01-01), Reed et al.

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