PLANETARY GEAR SYSTEM

摘要

Disclosed is a planetary gear system comprising a driven sun wheel (4), an internal gear (16), a group of first planetary gears (12), and a group of second planetary gears which are embodied as stepped planetary gears (8) that are provided with small step wheels (10) and large step wheels. The single gearing area of each of the first planetary gears (12) simultaneously engages with the internal gear (16) and a small step wheel (10) while the large step wheels (6) of the stepped planetary gears (8) mesh with the sun wheel (4). The first planetary gears (12) and the stepped planetary gears (8) are mounted within a common planet carrier (14). The number of stepped planetary gears (8) corresponds to half the number of the first planetary gears (12). The small step wheels (10) of the stepped planetary gears (8) simultaneously engage with a pair of adjoining first planetary gears (12). The internal gear (16) and the first planetary gears (12) are embodied in a conical manner while means (38, 40) are provided for adjusting the axial position of the first planetary gears (12) such that the tooth clearance is adjustable.