Stator module with protection structure and a fan thereof

摘要

A fan includes a fan frame, a rotor, a stator module and a protection structure. The fan frame has a base seat and the stator module is disposed on the base seat. The stator module includes a silicon steel sheet assembly having multiple splits and multiple outer faces. The rotor is disposed in the fan frame corresponding to the outer faces of the silicon steel sheet assembly. The protection structure includes multiple posts corresponding to the splits of the silicon steel sheet assembly. The posts are welded with the splits by means of laser welding.

主权项

1. A protection structure applicable to a stator module having a silicon steel sheet assembly with multiple splits, the protection structure comprising:
a first cover body disposed at one end of the stator module and corresponding to an upper insulation support of the stator module, the first cover body including multiple posts, the first cover body further including a first central hole formed at a center of the first cover body and open to the stator module, the first cover body further including a first annular wall formed on an outer circumference of the first cover body and connected with the stator module, the multiple posts being arranged on the first annular wall at intervals corresponding to said multiple splits; a second cover body having a diameter greater than the first cover body disposed at the other end of the stator module and corresponding to a lower insulation support of the stator module, the multiple posts extending from the first cover body to the second cover body, each of the posts having an extension end connected with the second cover body; the silicon steel sheet assembly further comprising a plurality of separate silicon steel sheets extending between said posts and between said first cover body and said second cover body around a circumference of said stator module, two junctions existing between two sides of each post and ends of two of said silicon steel sheets of the silicon steel sheet assembly; and a laser welding section respectively formed at the two junctions to weld the posts, the cover bodies and the silicon steel sheet assembly together, wherein the posts seal the multiple splits of the silicon steel sheet assembly, and thereby the silicon steel sheet assembly isolates the stator module from the exterior around said circumference.