Planetary gear transmission systems or components – Planet periphery surrounds axis of interacting gear – Particular gear tooth
Patent
1995-12-22
1997-12-09
Marmor, Charles A.
Planetary gear transmission systems or components
Planet periphery surrounds axis of interacting gear
Particular gear tooth
475168, 74462, F16H 132, F16H 5508, F16H 5510
Patent
active
056954255
ABSTRACT:
A planetary gear apparatus comprising an inner tooth gear having an inner peripheral portion formed with a plurality of inner teeth each in the form of a semi-circular cross-section shape and an outer tooth gear positioned within the inner tooth gear and having an outer peripheral portion formed with a plurality of outer teeth each in the form of a wave shape. The outer tooth gear has a center axis offset at an offset amount from the center axis of the inner tooth gear, and revolvable while being held in sliding and meshing contact with the inner tooth gear with the center axis of the outer tooth gear moving on a revolution orbit encircling and spaced from the center axis of the inner tooth gear at a distance equal to the offset amount. The outer teeth of the outer tooth gear have their respective tooth profiles each including deddendum and addendum portions, and a pair of tooth engaging portions each connected at its deddendum side end with the deddendum portion and at its addendum side end with the addendum portion. In the planetary gear apparatus, each of the tooth engaging portions of the tooth profiles has an epitrochoidal tooth surface extending on a theoretical epitrochoid curve having a central point coincident wit the center axis of the outer tooth gear, and the epitrochoidal tooth surfaces of the outer teeth are partly continually held in pressing contact with the inner teeth of the inner tooth gear even under the state that no load torque is applied to the outer tooth gear. The deddendum and addendum portions of the tooth profile of the outer tooth are closer to the center axis of the outer tooth gear than the theoretical epitrochoid cure, thereby making it possible to have the deddendum and addendum portions held out of contact with the inner teeth of the inner tooth gear even under the state that a certain load torque is exerted on the outer tooth gear.
REFERENCES:
patent: 1694031 (1928-12-01), Braren
patent: 3946620 (1976-03-01), Yamamoto et al.
patent: 4050331 (1977-09-01), Braren
patent: 4552037 (1985-11-01), Distin, Jr. et al.
patent: 4909102 (1990-03-01), Haga
patent: 5368455 (1994-11-01), Eisenmann
patent: 5429556 (1995-07-01), Ishida et al.
Hashimoto Masataka
Wang Hong You
Estremsky Sherry Lynn
Marmor Charles A.
Teijin Seiko Co., Ltd.
LandOfFree
Outer tooth profile of planetary gear apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Outer tooth profile of planetary gear apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Outer tooth profile of planetary gear apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1603272