Resin double helical gear pair

Details Resin double helical gear pair Resin double helical gear pair

2007-10-12

2011-10-11

Hannon, Thomas R (Department: 3656)

Machine element or mechanism

Gearing

Teeth

C074SDIG010

Reexamination Certificate

active

08033196

ABSTRACT:
It is an object of the present invention to approximate of life of each resin double helical gear of a gearing resin double helical gear pair to each other by effectively increasing the strength of the tooth of the resin double helical gear with the higher rotational speed; and to lengthen life of the gearing resin double helical gear pair by effectively increasing the strength of the tooth of the resin double helical gear that comes to the end of its life earlier due to stress concentration out of the gearing resin double helical gear pair. A resin double helical gear pair includes a first resin double helical gear and a second resin double helical gear with the larger diameter gearing into the first double helical gear. The first double helical gear is formed so that at least an addendum modification coefficient of a peak of a chevron tooth is larger than addendum modification coefficients of other sections. The second double helical gear is formed so that a sum of the addendum modification coefficient of the first double helical gear and an addendum modification coefficient of the second double helical gear in a gearing position of the first double helical gear and the second double, helical gear is a constant value along a tooth width direction.

REFERENCES:
patent: 2005-069458 (2005-03-01), None
patent: 2006-250182 (2006-09-01), None
Shigeta Yoshimoto et al., Machine Design:Design of Mechanical Components and System, Rikogaku Co., May 20, 2006, Japan.

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