Differential planet gear unit

Details Differential planet gear unit Differential planet gear unit

1989-01-06

1990-07-24

Diehl, Dwight

Planetary gear transmission systems or components

Planetary gearing or element

Coaxial teeth around planet pinion engage axially spaced...

74462, 475344, F16H 132, F16H 5508

Patent

active

049427814

ABSTRACT:
The present invention discloses a differential planet gear unit, in which a sun gear is engaged with first and second ring gears coaxially aligned through planet gears interposed therebetween, and the tooth number of the first ring gear is different from the tooth number of the second ring gear, in which the first and second ring gears engage with first and second portions of each planet gear, and the diameters of the addendum circles of the teeth of the first ring gear and the first tooth portion of each planet gear are different from those of the second ring gear and the second tooth portion of each planet gear, respectively, to reduce a difference between an approaching contact length and a receding contact length along a contact action line. The first ring gear and the second tooth portion of each planet gear may be formed with first and second chamfers, respectively, in both sides of the addendum of the teeth to reduce the difference between the approaching and receding contact lengths.

REFERENCES:
patent: 2682760 (1954-07-01), Shenk
patent: 3116651 (1964-01-01), Hardy
patent: 3329037 (1967-07-01), Stott
patent: 3596538 (1971-08-01), Braun
patent: 3792629 (1974-02-01), Applebury
patent: 4043226 (1977-08-01), Buuck
patent: 4280376 (1981-07-01), Rosen
patent: 4366727 (1983-01-01), Jonsson
patent: 4593679 (1986-06-01), Collins
patent: 4679459 (1987-07-01), F'Geppert
Masataka Senba, Gear, vol. 10, Nikkan Kogyo, Nov. 1967, pp. 3989-3992.
Muneharu Morozumi, Design of Planetary Gears and Differential Planetary Gears, Sankei, Jun. 1, 1984, pp. 124-127.

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