Clamping apparatus for the rotary spindle of a machine tool

Details Clamping apparatus for the rotary spindle of a machine tool Clamping apparatus for the rotary spindle of a machine tool

1989-06-22

1990-08-07

Look, Edward K.

Expansible chamber devices

Displacement control of plural cylinders arranged in...

Having motor-operated adjustment

92 136, 92106, 92110, 279 4, F01B 3114, F15B 1524, B23B 522, B23B 3110

Patent

active

049458191

ABSTRACT:
The chuck or collet actuating apparatus for a machine tool comprises a rotating clamping cylinder, an axially slidable clamping piston rotating with the clamping cylinder and a coaxial cylindrical projecting portion in the clamping cylinder. The projecting portion carries a thread, on which a threaded ring is guided and engaged. This threaded ring is provided with a coaxial undercut annular groove in an opposing surface facing the clamping cylinder and is securable against rotation on the projecting portion. A plurality of stop pins are provided which are axially unshiftable relative to the threaded ring and which engage and slide in the annular groove. The stop pins project through an opposing wall of the clamping cylinder into an interior space of the cylinder axially slidable and sealing axially. These stop pins form a stop for the clamping piston limiting its displacement.

REFERENCES:
patent: 3020057 (1962-02-01), Gamet
patent: 3167155 (1965-01-01), Geyer
patent: 3456955 (1969-07-01), Bruinsmn
patent: 3978884 (1976-09-01), Sunstrom
patent: 3999770 (1976-12-01), Sollami
patent: 4825755 (1989-05-01), Takano

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