FIELD: machine building.
SUBSTANCE: invention is related to machine building and is intended for drives that request high transmission ratios at small dimensions. Planetary gear comprises central gear (1) of external engagement, central wheel (15) of internal engagement and satellites (10) engaged with both central wheels. Satellites are installed on carrier axes (6). Central wheel (1) of external engagement is arranged as single-tooth with tooth profile in the form of eccentrically displaced circumference (3). Satellites (10) have teeth of cycloid profile (14). Teeth of central wheel (15) of internal engagement are formed by bolt teeth (19) or, as a version, have cycloid shape. With high efficiency factor in one stage of planetary gear it is possible to provide transmission ratio of more than 20 without increase of its dimensions.
EFFECT: higher efficiency factor.
3 cl, 6 dwg
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