Draw bar mechanism

Details Draw bar mechanism Draw bar mechanism

1990-03-27

1991-06-11

Bilinsky, Z. R.

Machine element or mechanism

Mechanical movements

Reciprocating to reciprocating

409233, 279 1W, 279 51, B23B 3110

Patent

active

050222783

ABSTRACT:
In a wedge ring mechanism for providing a collet clamping force in a machine tool spindle, a sleeve member retains a plurality of steel balls. A mechanical advantage is realized as the balls are wedged between obliquely inclined surfaces. The sleeve member is provided with a plurality of cylindrical passageways so that positive control over the motion of the balls is maintained at all times during both engagement and release of the collet clamping force, thereby obviating the need to pinch out the balls during release.

REFERENCES:
patent: 3533636 (1970-10-01), Firestone
patent: 3615100 (1971-10-01), Banner
patent: 4068559 (1978-01-01), Schmid, Jr. et al.
patent: 4347753 (1982-09-01), Claussen et al.

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