Sheet metal-made poly V-grooved pulley and method of manufacturing the pulley
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 30, 2003
Grant Date -
N/A
app pub date -
Dec 20, 2000
filing date -
May 13, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a cylindrical poly-V pulley made of metal sheet suitable for forcedly fitting a one-way clutch or a bearing. The present invention can easily provide thick ears for preventing a V-belt from disengaging, and ensure an enough length of an axial straight line of a bore of a peripheral wall. Ears for preventing the V-belt from disengaging, are protrusively shaped in an annular state on axially both ends on an outer surface of a cylindrical peripheral wall. Each ear includes an inner ear portion outwardly protruded from both ends of the peripheral wall and an outer ear portion folded back from the protruded outer end of the inner ear portion to the outer surface of the inner ear portion so as to be closely overlapped with each other, and the inner end surface of the ear is flush with the inner surface of the peripheral wall. Therefore, the ear can be thickened by an overlap structure by the inner and outer ear portions, and the length of the axial straight line of the bore of the peripheral wall can be ensured for the and the length of the axial straight line of the bore of the peripheral wall can be ensured for the thickness of the outer ear portion.
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