Stator module with protection structure and a fan thereof

Patent metadata

Field	Value
Publication number	US-9523368-B2
Application number	US-201313784756-A
Country	US
Kind code	B2
Filing date	Mar 4, 2013
Priority date	Mar 4, 2013
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

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.

First claim

What is claimed is:

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.

2. The protection structure as claimed in claim 1 , wherein the second cover body further includes a second central hole, a second annular wall, a third annular wall and a receiving space, the second annular wall being formed around the second central hole and connected with the stator module, the third annular wall being formed on an outer circumference of the second cover body, the receiving space being formed between the second central hole and the third annular wall.

3. A fan comprising:
a base seat disposed at a center of a fan frame;
a rotor disposed in the fan frame;
a stator module disposed on the base seat corresponding to the rotor, the stator module including:
a circuit board;
an insulation support assembly including an upper insulation support and a lower insulation support;
a silicon steel sheet assembly comprising an plurality of silicon steel sheets fitted between the upper insulation support and the lower insulation support, the silicon steel sheet assembly including a first end, a second end, multiple sheets providing outer faces formed between the first and second ends and multiple splits respectively formed between the adjacent outer faces to axially pass through the first and second ends; and
a winding assembly wound around the silicon steel sheet assembly and the insulation support assembly and connected to the circuit board; and
a protection structure including:
a first cover body disposed at the first end of the silicon steel sheet assembly and corresponding to the upper insulation support, the first cover body including multiple posts respectively correspondingly connected with and sealing the splits, the outer faces of the silicon steel sheet assembly being respectively disposed between the posts and exposed to outer side corresponding to the rotor, 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;
a second cover body having a diameter greater than the first cover body disposed at the second end of the silicon steel sheet assembly and corresponding to the lower insulation support, 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;
two junctions existing between two sides of each post and two sides of each split 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 the silicon steel sheet assembly isolates the stator module from the exterior about a circumference thereof.

4. The fan as claimed in claim 3 , wherein the second cover body further includes a second central hole, a second annular wall, a third annular wall and a receiving space, the second annular wall being formed around the second central hole and connected with the second end of the silicon steel sheet assembly, the third annular wall being formed on an outer circumference of the second cover body, the receiving space being formed between the second central hole and the third annular wall for receiving the circuit board.

5. The fan as claimed in claim 4 , further comprising a welding section formed by means of laser welding at a junction between the posts and the splits, a junction between the first annular wall and the first end of the silicon steel sheet assembly and a junction between the second annular wall and the second end of the silicon steel sheet assembly, a junction between the first central hole and the insulation support assembly and a junction between the extension ends of the posts and the second annular wall.

6. The fan as claimed in claim 4 , wherein the protection structure further includes a third cover body mated with the second cover body to enclose the circuit board between the second cover body and the third cover body to enclose the circuit board between the second cover body and the third cover body, the third cover body having a third central hole open to the insulation support assembly.

7. The fan as claimed in claim 6 , further comprising a welding section formed by means of laser welding at a junction between the posts and the splits, a junction between the first annular wall and the first end of the silicon steel sheet assembly and a junction between the second annular wall and the second end of the silicon steel sheet assembly, a junction between the first central hole and the insulation support assembly and a junction between the extension ends of the posts and the second annular wall and a junction between the third central hole and the insulation support assembly and a junction between the third annular wall of the second cover body and the third cover body.

Assignees

• Asia Vital Components Co Ltd

Inventors

• Chang Bor-Haw
• Liu Shu-Fan
• Chang Kuo-Chen

Classifications

• H02K5/10

  with arrangements for protection from ingress, e.g. water or fingers · CPC title

• F04D29/646

  Mounting or removal of fans · CPC title

• F04D25/0613 Primary

  the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator · CPC title

• F04D25/0646 Primary

  Details of the stator · CPC title

• H02K3/32

  Windings characterised by the shape, form or construction of the insulation · CPC title