Planetary gear transmission systems or components – Planet pinion is friction gear – Variable speed ratio
Patent
1998-04-22
2000-02-15
Marmor, Charles A.
Planetary gear transmission systems or components
Planet pinion is friction gear
Variable speed ratio
475193, 475170, F16H 1548
Patent
active
060246642
ABSTRACT:
A double-eccentric friction drive having a natural and automatic friction-increasing effect under load includes a friction ring and a wheel which is located eccentrically with respect to the friction ring, and a hollow cylindrical or ring-shaped wedged member that is eccentric relative to the wheel and the friction ring and whose side wall is held against the friction ring by the wheel. In continuously variable embodiments of the friction drive, one or more of the three members comprises a pair of spaced-apart halves whose spacing from each other is infinitely adjustable, and one or more of the members includes tapered surfaces which coact with the movable halves so as to effectively vary the diameters of contact surfaces between the members. The eccentricity of the wheel is infinitely adjustable in harmony with the movable halves to constantly urge the wedged member against the friction ring, whereby the ratio of an input speed to an output speed of the drive is infinitely adjustable.
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Ho Ha
Marmor Charles A.
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