Tapered tooth helical gear drive train for eliminating the need

Details Tapered tooth helical gear drive train for eliminating the need Tapered tooth helical gear drive train for eliminating the need

1980-09-22

1983-02-08

Byers, Jr., Nile C.

Machine element or mechanism

Gearing

Backlash take-up

74392, F16H 5518

Patent

active

043721761

ABSTRACT:
A method and apparatus for eliminating axial thrust and consequently the need for thrust bearings in parallel shaft and crossed-axis helical drive arrangements is disclosed. According to this invention, a gear with helically cut teeth which maintain a constant profile but have a uniformally tapered top land and bottom land, the top land of which increases in width as the bottom land decreases in width is mounted on a shaft. This tapered tooth helical gear is meshed with a second similar gear mounted in meshing proximity on a second shaft. During operation the axial forces associated with helical gears are resisted by the compressive interfacing, with zero backlash, of the tapered teeth. Thus, the need for thrust bearings is eliminated.

REFERENCES:
patent: 415044 (1889-11-01), Joslin
patent: 1683758 (1928-09-01), Candee
patent: 1989663 (1935-02-01), Bethune
patent: 3079808 (1963-03-01), Wildhaber
patent: 3405580 (1968-10-01), Hallden
patent: 3563108 (1971-02-01), Wydler
patent: 3765303 (1973-10-01), Fischer
patent: 3812737 (1974-05-01), Campbell
patent: 4187735 (1980-02-01), Terry

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