Turning – Lathe for crank or crank pin
Patent
1997-12-01
1999-08-03
Pitts, Andrea L.
Turning
Lathe for crank or crank pin
82107, 82108, 82109, B23B 522
Patent
active
059310693
ABSTRACT:
Apparatus for machining first and second throws on a crankshaft wherein the throws are displaced outwardly from the central axis of the shaft in angularly spaced relation to one another. The crankshaft is gripped by a collet. The collet is mounted on a spindle at a point offset radially from the spindle axis. The collet is capable of rotating from a first position in which the first throw is on the axis of spindle rotation to a second position in which the second throw is on the axis of spindle rotation. A tool is provided for cutting the throws when the collet is secured in either one of the two positions. A collet receiver is provided to open and close the collet. A housing for the collet and collet receiver is mounted on the spindle. The collet is locked in each of the two rotative positions by interengaging teeth on the collet receiver and on the housing. When the collet receiver is moved relative to the housing, the teeth become disengaged so that the collet is free to rotate. Thereafter by relatively moving the collet and collet receiver, the collet is opened to release the crankshaft.
REFERENCES:
patent: 1451078 (1923-04-01), Mantha
patent: 2261086 (1941-10-01), Hunt
patent: 2599931 (1952-06-01), Mosca
patent: 2733560 (1956-02-01), Strnad
Garnett Donald W.
Smith Stephen P.
Pitts Andrea L.
The Olofsson Corporation
Tsai Henry W. H.
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