Cooling fan with rotor shaft end abutting polyoxymethylene tube bottom

摘要

An exemplary cooling fan includes a base, a central tube formed at the base, a stator, and a rotor being rotatable relative to the stator. The central tube is made of polyoxymethylene. The central tube includes a bottom plate mounted on the base and a peripheral sidewall extending upwardly from a peripheral edges of the bottom plate. The bottom plate and the sidewall cooperatively define a blind hole therebetween. The stator is mounted around the sidewall of the central tube. The rotor includes a hub and a shaft extending from the hub. The shaft includes a free end received in the blind hole and directly abutting the bottom plate.

主权项

1. A cooling fan, comprising:
a base; a central tube made of polyoxymethylene, the central tube having a bottom plate mounted on the base and a peripheral sidewall extending upward from a peripheral edge of the bottom plate; a blind hole, wherein the blind hole is defined by and located between the bottom plate and the sidewall; a stator mounted around peripheral of the sidewall of the central tube; a rotor, the rotor being rotatable relative to the stator, the rotor comprising a hub and a shaft extending from the hub, the shaft having a free end received in the blind hole and directly abutting the bottom plate, wherein a bottom extremity of the free end directly abuts and contacts the bottom plate of the central tube; and an annular clasp received in the blind hole, the annular clasp comprising an inner edge, wherein the inner edge of the clasp engages with an outer circumferential surface of the free end.