Machine element or mechanism – Gearing – Toothed gear and recirculated unconnected elements
Patent
1976-03-15
1977-09-27
Gerin, Leonard H.
Machine element or mechanism
Gearing
Toothed gear and recirculated unconnected elements
29159R, F16H 5544, B21D 5326
Patent
active
040503216
ABSTRACT:
A one-piece, sheet metal multi V-grooved pulley has a circular hub wall integrally connected with a cylindrical side wall, which side wall terminates in an open end opposite of the hub wall. A series of outwardly opening V-shaped grooves is formed by pairs of V-shaped flange walls in the cylindrical side wall. The pairs of flange walls decrease in metal thickness progressively from the hub wall toward the open end.
The V-grooved pulley is made by forming a cup-shaped stage blank having a bottom hub flange wall and a connected outer cylindrical wall terminating in an open end. The stage blank is formed by roller spinning an outer annular portion of a sheet metal disc along a stepped cylindrical surface of a headstock die. A series of integrally connected cylindrical surfaces is formed along the interior of the cylindrical wall of the stage blank by the roller spinning operation. The metal thicknesses of the cylindrical cup wall sections defined by the stepped surfaces decrease in a step-like fashion progressing from the hub flange wall toward the open end. A series of V-shaped grooves then is cold rolled in the cylindrical wall by inwardly displacing the center of each of the stepped cylindrical wall sections to provide pairs of V-flanges which form the V-shaped grooves. Each cylindrical wall section of the series provides the metal for the pair of V-flanges which forms the V-shaped grooves, whereby the metal thickness of the V-flange pairs decrease progessing toward the open end of the pulley.
REFERENCES:
patent: 3831366 (1974-12-01), Jacobs
patent: 3935627 (1976-02-01), Wolbert
patent: 3962926 (1976-06-01), Kotlar
patent: 3977264 (1976-08-01), Sproul
patent: 3994181 (1976-11-01), Sproul
patent: 3995474 (1976-12-01), Kraft
Aspro, Inc.
Gerin Leonard H.
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