Machine element or mechanism – Gearing – Teeth
Patent
1997-07-22
1998-09-08
Herrmann, Allan D.
Machine element or mechanism
Gearing
Teeth
74462, F16H 5508
Patent
active
058029214
ABSTRACT:
Since the true power density of gearing is a function of the dynamic load, maximization of this critical performance property can be achieved only if both the static component and the dynamic increment of load are minimized. The invention discloses how these two objectives may be achieved in the same gear set. Both static and dynamic tooth stresses are minimized by forming the gears to have an optimum load distribution, a feature realized by using a new type of modification that minimizes the tooth surface relief area. The second requirement, of minimizing the dynamic increment, is accomplished in helical and spiral bevel gearing by proportioning the teeth to have a fully elastic "self-complementary" tooth pair stiffness curve, which gives a mesh stiffness characteristic that remains substantially constant throughout the entire tooth pair engagement angle at all loads and all speeds.
REFERENCES:
patent: 3982444 (1976-09-01), Rouverol
patent: 5083474 (1992-01-01), Rouverol
patent: 5315790 (1994-05-01), Kish et al.
patent: 5341699 (1994-08-01), Rouverol
patent: 5485761 (1996-01-01), Rouverol
Article titled "Design of Helical Gears . . . " Sunaresan et al; JSME MPT91; pp. 1-6, Nov. 1991.
Article titled "Vibration of Power Transmission Helical Gears"; Umezawa et al; Bulletin of JSME, vol. 28, No. 238; pp. 694-700, Apr. 1985.
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