Adjusting device for a rotational adjustment of two centrically mounted adapter elements, in particular for a seat, and planetary gear configuration

摘要

An adjustment device for a rotational adjustment of two centrically mounted adapter pieces especially for a seat, preferably for a seat of a motor vehicle, includes a planetary gear with a sun wheel and planetary wheels. The planetary gear has a first housing part and a second housing part each with an internal toothing. The housing parts can be rotated relative to one another and are captively held on one another. Both housing parts have an edge flange. A separate retaining ring, which overlaps the edge flanges, holds the housing parts together. This allows to assemble the adjustment device in a simple manner and at low cost and ensures that the adjustment device functions even when subjected to high stress.