ECCENTRIC PLANETARY INTERNAL GEARING Russian patent published in 2007 - IPC F16H1/32 

FIELD: mechanical engineering; planetary gearings.

SUBSTANCE: invention relates to mechanical planetary internal gearings with small differences in sizes of meshing gears. Proposed gearing contains two holders 1 and 2 enclosing each other and forming module by means of bearings 6, 7, and eccentric bushing 3. Axes of rotation of holders are displaced relative to each other. Eccentric section 9 is made on one of holders on which planet pinion 11 is fitted on bearings 10. Seat hole is displaced from center of planet pinion, and central gear 13 of internal gear pair is rigidly connected with other holder. Outer holder 2 and eccentric bushing 3 are provided with coupling elements 15 and 14 with shaft and housing of external mechanism, respectively. Meshing in gearing can be provided by teeth of different shape, rollers on cogwheel teeth, friction forces or balls and periodical rolling races.

EFFECT: provision of simple, reliable and cheap transfer module built into any standard mechanisms without considerable adaptation and providing wide range of gear ratios.

21 cl, 18 dwg