Fan yaw driving device

The utility model discloses a fan yaw driving device, including motor and the speed reducer that is connected, the output pinion of speed reducer meshes with the yaw bearing of fan mutually, wherein shaft coupling of installation between last one -level sun gear shaft of speed reducer and the output pinion, the moment of torsion setting value of shaft coupling sets up the back according to the driftage system configuration of fan the shaft coupling can loosen when the moment of torsion transfinites, reaches the purpose of protection yaw bearing and output pinion. The utility model discloses awith the mode of shaft coupling, when the load of the last one -level output of speed reducer was greater than shaft coupling settlement load, the shaft coupling is automatic to be unclamped between speed reducer end one -level sun gear shaft and output pinion, and the contact is thrown off with the output pinion to speed reducer end one -level, reaches the purpose of protecting output pinion andyaw bearing inner circle.