Wind power gear box

The invention relates to the technical field of gear boxes and discloses a wind power gear box. The wind power gear box comprises a planetary gear train, a second-stage gear train and a connecting structure; a shaft neck is arranged at one end of a sun gear of the planetary gear train, and first meshing teeth are arranged on the end face of the shaft neck; the second-stage gear train comprises aninput shaft, second meshing teeth are arranged on the end face of the input shaft, and the second meshing teeth are meshed with the first meshing teeth; and the connecting structure comprises an axialconnecting piece, one end of the axial connecting piece is connected to the shaft neck, and the other end of the axial connecting piece is connected to the input shaft. Through the structure, the connecting structure of the wind power gear box can reduce the axial space occupation of a shaft system, improve the utilization rate of materials and reduce the cost. 本发明涉及齿轮箱技术领域，公开了一种风电齿轮箱，包括：行星轮系，行星轮系的太阳轮的一端设有轴颈，轴颈的端面上设有第一啮合齿