PLANETARY DIFFERENTIAL REDUCTION GEARBOX Russian patent published in 2014 - IPC F02C7/36 

FIELD: engines and pumps.

SUBSTANCE: reduction gearbox comprises input pinion shaft with external gearing with the set of planetary pinions, inner output shaft and outer output shaft with solid of revolution including the inner gearing rim. Inner output shaft is fitted concentrically in outer output shaft. Input pinion shaft is equipped with bearings. Note here that al least one bearing of input pinion shaft is concentrically is fitted in inner output shaft. Input pinion shaft is engaged via outer helical gearing with small rim of the set of planetary pinions engaged with inner output shaft provided with bearing arranged aligned with outer output shaft bearing. Large rim of the set of planetary pinions is engaged via inner spur gearing with the rim of solid of revolution. Outer output shaft inner gearing rim pitch circle diameter relates to input pinion shaft pitch circle as 1.5-2.

EFFECT: decreased overall dimensions, decreased losses in gearing.

2 cl, 2 dwg