ECCENTRIC CYCLOID REDUCTION GEAR WITH PRELIMINARY STAGE Russian patent published in 2008 - IPC F16H1/32 

FIELD: engines and pumps.

SUBSTANCE: invention relates to planetary toothed gearing with the central axis located inside the planetary gear wheel main circumference (CYCLO-type reduction gear). Housing (1) of the eccentric cycloid reduction gear with a preliminary stage incorporates turning flanges fitted in bearings. The aforesaid flanges accommodate eccentric shafts (9) with eccentric parts (10). Eccentrics (10) of shafts (9) support cycloid plate (12) fitted in bearings to effect a plane-parallel planetary motion with shafts (9) running. The plate (12) comes into mesh with the internal gearing wheel the rim of which is formed by rollers (15) fitted unlocked on the housing inner surface. The preliminary stage satellites (18) are rigidly fitted on eccentric shafts (9) to be driven by gear (20) in mesh with the central shaft (21). The preliminary stage gear (20) represents a single-tooth gear with a profile of eccentrically shifted circumference (22), the satellites of the said stage feature a cycloid profile (19).

EFFECT: higher accuracy of gearing and torque.

4 cl, 8 dwg