Bearing assembly for planetary gear pinion

Details Bearing assembly for planetary gear pinion Bearing assembly for planetary gear pinion

2008-01-25

2011-11-22

Holmes, Justin (Department: 3655)

Planetary gear transmission systems or components

Planetary gearing or element

Reexamination Certificate

active

08062165

ABSTRACT:
An outer needle bearing race and thrust washer assembly provides improved lubrication for a pinion gear of a planetary gear assembly. The bearing race and thrust washer assembly are used in pairs with the bearing races disposed within the planet or pinion gear and the thrust washers disposed adjacent the end faces of the planet or pinion gear. Each assembly includes a cylindrical bearing portion having a crowned, i.e., convex, inner surface which is secured at one end to a thrust washer. The outside face of the washer includes a plurality of shallow radial channels or grooves. A plurality of oil passageways extend from the grooved surface of the washer to its opposite surface inside the cylindrical bearing portion.

REFERENCES:
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patent: 4772188 (1988-09-01), Kimura et al.
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patent: 5219232 (1993-06-01), Adams et al.
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patent: 7448980 (2008-11-01), Abarquez et al.
patent: 2004/0105601 (2004-06-01), Honda et al.
patent: 2005/0209039 (2005-09-01), Kempf
patent: 03014947 (1991-01-01), None

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