Gear device having tooth profile improved in reducing local fric

Details Gear device having tooth profile improved in reducing local fric Gear device having tooth profile improved in reducing local fric

1994-11-29

1996-07-23

Bonck, Rodney H.

Machine element or mechanism

Gearing

Teeth

74462, F16H 124

Patent

active

055378897

ABSTRACT:
A gear device improved in lowering the product of the load F acting on a pair of intermeshing teeth and the relative sliding velocity v at the area of contact of the gears, thereby minimizing the frictional heat. The gear device includes a first gear and a second gear each having a tooth profile formed by an involute curve. At least one of the first and second gears is provided with the tooth profile corrected by a combination of a correction curve W and the involute curve. On plane coordinates consisting of an x axis, an origin and a y axis which intersects with the x axis at the origin, the correction curve W is expressed by equations passing through points P.sub.1 (x.sub.1, y.sub.1) and P.sub.2 (x.sub.2, y.sub.2) and satisfying the conditions of: y=0, dy/dx=0 at the origin when x.sub.1 <x.sub.2 and y.sub.1 <y.sub.2. The x axis is the line of action indicative of a locus along which an intermeshing point moves while the first gear transmits a force to the second gear. The origin is a point at which the x axis intersects with an intermeshing pitch circle of the first and second gears.

REFERENCES:
patent: 1701222 (1929-02-01), Belati
patent: 2422326 (1947-06-01), Wildhaber
patent: 2436276 (1948-02-01), Wildhaber
patent: 3438279 (1969-04-01), Rouverol
patent: 4640149 (1987-02-01), Drago
patent: 4651588 (1987-03-01), Rouverol
patent: 5315790 (1994-05-01), Kish et al.
ISO/TC 60/SC 3/WG 12, "CALCULATION OF THERMAL LOAD CAPACITY OF CYLINDRICAL, BEVEL AND HYPOID GEARS" Doc N 6, Part 1: Evaluating the Risk of Scuffing, pp. 1-54 and Doc N 7, Part 2: Evaluating the Bulk Temperature Distribution, pp. 1-34.
"MACHINE DESIGN HANDBOOK", Kyoritu Shuppan, 1955, Apr. 25, pp. 10-1 to 10-57.
Engineering Materials and Design, vol. 20, No. 2, Feb. 1976, pp. 25-31, W. S. Rouverol, "SELECTIVE PERFORMANCE GEARING".
Antriebstechnik, vol. 15, No. 6, Jun. 1975, pp. 324-329, J. Hlebanja, "KONKAV-KONVEXE VERZAHNUNG ERMITTLUNG DER ZAHNFLANKEN UND EINIGE GRENZFALLE".
Gear Technology, No. 6, Nov./Dec. 1988, S. M. Vijayakar, et al., "GEAR TOOTH PROFILE DETERMINATION FROM ARBITRARY RACK GEOMETRY", pp. 18-30.

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