Reducing gear has internal geared wheels with inner and outer toothing, drive core, with rotary arm element, direct contact segments.

摘要

The internal geared wheel (4), fixed to the housing, has a cylindrical inner toothing (40) with a first number of teeth. A driven internal geared wheel (10) has a second number of teeth. The two sets of toothing engage with the inner (62) and outer (61) cogging of a radially flexible ring (6). A drive core (8) engages with one or more peripheral sections of the outer cogging of the radially flexible ring. The drive core consists of at least one rotary arm element (8) with at least one direct contact segment (81,82) which engages with the outer cogging .