Tail gear box, motor and fan

The invention discloses a tail gear box, a motor and a fan, relates to the technical field of fans, and solves the problem that in the prior art, a power line led out from a motor body needs to be connected to a gear switch located on a middle supporting column of a floor fan. The tail gear box comprises a surface cover and the gear switch, and the gear switch is installed on the surface cover. The gear switch is arranged on the tail gear box, and the power line led out from the motor body can be directly connected with the gear switch, so that the use of the power line can be greatly reduced,and the cost can be reduced; on one hand, the distance between the motor body and the gear switch is short, and a PVC sleeve does not need to be arranged outside the power line, so that the cost canbe further reduced, and noise generated by the friction between the PVC sleeve and a fan shell when the fan shakes the head can be avoided; and on the other hand, the power line can be connected to the gear switch without bein