Twist planet drive

Details Twist planet drive Twist planet drive

1995-01-03

1996-07-30

Ta, Khoi Q.

Planetary gear transmission systems or components

Planetary gearing or element

Coaxial teeth around planet pinion engage axially spaced...

475339, 475340, 475346, F16H 128, F16H 1306

Patent

active

055406300

ABSTRACT:
A planetary gear system includes a sun gear coupled to an annular ring gear through a plurality of twist-planet gears, a speeder gear, and a ground structure having an internal ring gear. Each planet gear includes a solid gear having a first half portion in the form of a spur gear which includes vertical gear teeth and a second half portion in the form of a spur gear which includes helical gear teeth that are offset from the vertical gear teeth and which contact helical gear teeth on the speeder gear and helical gear teeth on the outer ring gear. One half of the twist planet gears are preloaded downward, while the other half are preloaded upwards, each one alternating with the other so that each one twists in a motion opposite to its neighbor when rotated until each planet gear seats against the sun gear, the outer ring gear, the speeder gear, and the inner ring gear. The resulting configuration is an improved stiff anti-backlash gear system.

REFERENCES:
patent: 2868037 (1959-01-01), Hindmarch
patent: 3160026 (1964-12-01), Rosen
patent: 3675510 (1972-07-01), Duggar, Jr.
patent: 3721135 (1973-03-01), Kelley
patent: 5366423 (1994-11-01), Mori et al.

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