LOW-BACKLASH SPEED-REDUCING TWO-STAGE PLANETARY GEARING

摘要

In a low-backlash speed-reducing two-stage planetary gearing, the first stage (2) has oblique teeth in each case over the complete width of the tooth profiles which remain the same over the individual teeth, while, in the case of the tooth system in the second stage (3), the individual tooth edges have a continuously changing profile shift (conical gearwheels) over the respective width of the tooth. With such a planetary gearing, it is possible to have an extremely low-backlash output drive stage, with high input speeds, with the gearing running overall in a low-noise manner, in which output drive stage the backlash can easily be adjusted, even after long running times. The adjustment is carried out by axial movement of the planet gears (11) with respect to the annular gear (14) and the sun gear (10) in which they engage.