Nutating drive mechanisms having spherical ball driving elements

Details Nutating drive mechanisms having spherical ball driving elements Nutating drive mechanisms having spherical ball driving elements

1982-10-18

1986-11-04

Staab, Lawrence

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

F16H 128

Patent

active

046204563

ABSTRACT:
A nutating gear reduction mechanism employs two series of rolling elements in the form of balls as the means of torque transmission. In this manner, gear teeth are eliminated and replaced with conjugate pairs of trochoidally cut grooves, with the rolling elements operating between the grooves formed in a wobble member, on the one hand, and a stator and an output member, on the other hand. Either single or multiple stage speed reduction may be achieved, the single stage version being obtained by replacing one set of conjugate trochoidal races with oval races coupling the wobble member and either the stator or the output member in a constant velocity fashion.

REFERENCES:
patent: Re17811 (1930-09-01), Braren
patent: 1277193 (1918-08-01), Cassel
patent: 2020123 (1935-11-01), Pollard
patent: 3085451 (1963-04-01), Morin
patent: 3590659 (1971-07-01), Maroth
patent: 3640154 (1972-02-01), Massie
patent: 4069718 (1978-01-01), F'Geppert

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