Miniaturized planetary gear transmission mechanism based on duplicate gear

The utility model discloses a miniaturized planetary gear transmission mechanism based on duplicate gears. The miniaturized planetary gear transmission mechanism comprises a center shaft, a center gear, a planetary support, a planetary gear assembly and an inner tooth steel ring. The planetary gear assemblies are annularly assembled on the planetary support at equal angles, and each planetary gear assembly comprises a supporting rotating shaft, a small planetary gear located at one end of the supporting rotating shaft and a large planetary gear fixedly assembled at the other end of the supporting rotating shaft. The supporting rotating shaft is rotatably assembled in an assembling hole in the planet support through a pair of bearings; the center shaft is fixedly sleeved with the center gear and the planet support, the large planet gear is meshed with outer teeth of the center gear, and the small planet gear is meshed with inner teeth of the inner tooth steel ring. According to the utility model, the assembly