Y type planetary gearing

Details Y type planetary gearing Y type planetary gearing

1987-01-05

1989-07-25

Braun, Leslie A.

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74801, F16H 344

Patent

active

048502472

ABSTRACT:
A Y type planetary gearing consists basically of three central gears, a sun gear and two ring gears, and a number of identical planet gears. The three central gears have a common central axis and a number of teeth different from each other. Each planet gear has a uniform tooth profile in the longitudinal direction. The Y type planetary gearing of this invention has three important characteristics: (1) each planet gear is able to mesh simultaneously with the three central gears, (2) each pair of gears satisfy the law of conjugate gear-tooth action to provide uniform rotary motion, and (3) the planet gears are able to work properly without a carrier. Consequently, the disclosed Y type planetary gearing is compact in structure, small in size, low in cost, and capable of providing a high speed ratio.

REFERENCES:
patent: 1828114 (1931-10-01), Hubbard
patent: 1998891 (1935-04-01), Benson
patent: 2401875 (1946-06-01), Lawler
patent: 3453906 (1969-07-01), Ito
patent: 3675510 (1972-07-01), Duggar, Jr.
patent: 3792629 (1974-02-01), Applebury
patent: 4040312 (1977-08-01), Tappan et al.
patent: 4043226 (1977-08-01), Buuck
patent: 4280376 (1981-07-01), Rosen
patent: 4336727 (1983-01-01), Jonsson
patent: 4429594 (1984-02-01), Heller
"Analytical Mechanics of Gears", Earle Buckingham, pp. 1-3, 1949.

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