Coaxial contra-rotating double-rotor speed reduction transmission structure

The utility model discloses a coaxial contra-rotating double-rotor speed reduction transmission structure which comprises an upper gear, a lower gear, a hollow outer rotor shaft and an inner rotor shaft, the tooth surfaces of the upper gear and the lower gear are vertically and coaxially installed, and the hollow outer rotor shaft is connected with the upper gear in a centering and fastening mode.The inner rotor wing shaft penetrates through the hollow outer rotor wing shaft and is connected with the lower surface gear in a centering and fastening manner; thrust bearings are mounted at the upper ends of the upper gear and the lower gear, and tapered roller bearings are mounted at the lower ends of the upper gear and the lower gear; one or more power input cylindrical gears are arranged between the upper face gear and the lower face gear for meshing driving, and each power input cylindrical gear is provided with a self-aligning roller bearing. 本实用新型公开了一种共轴对转双旋翼减速传动构型，包括上方面齿轮、下方面齿轮、空心外旋翼轴和内旋翼轴，上方面齿轮和下方面齿轮齿面对齿面垂