Fan impeller structure of cooling fan

Patent metadata

Field	Value
Publication number	US-10273971-B2
Application number	US-201615063518-A
Country	US
Kind code	B2
Filing date	Mar 8, 2016
Priority date	Mar 8, 2016
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A fan impeller structure of cooling fan includes a blade assembly and a hub. The blade assembly has multiple blades and an annular cover body. The annular cover body is integrally formed on the rear ends of the blades by injection molding to enclose and connect with the rear ends of the blades. Alternatively, the annular cover body is fused and integrally connected with the rear ends of the blades by means of laser welding. The blade assembly and the hub are integrally connected with each other to form the fan impeller structure.

First claim

What is claimed is:

1. A fan impeller structure of a cooling fan, comprising:
a blade assembly having multiple blades, each blade having a front end, a rear end, and at least one rear opening formed through the rear end of the blade and an annular cover body integrally formed on the rear ends of the blades by injection molding to enclose and connect with the rear ends of the blades, the annular cover body being formed with multiple assembling sections disposed on one side of the annular cover body and multiple enclosure sections integrally formed with the annular cover body on two sides of the rear ends of the blades and extending through the openings to enclose the rear ends of the blades; and
a hub having a flange section, multiple perforations, a top wall, and a circumferential wall outward extending from a circumference of the top wall, the flange section outward extending from the circumferential wall, the flange section being correspondingly connected with the annular cover body, the perforations being formed through the flange section and integrally connected with the corresponding assembling sections.

2. The fan impeller structure of cooling fan as claimed in claim 1 , wherein the annular cover body has multiple notches, a top side, and a bottom side, the notches being formed on the bottom side of the annular cover body and arranged at intervals, the rear ends of the blades being positioned between the notches, the assembling sections being formed on the bottom side of the annular cover body of the annular cover body along an inner circumference of the annular cover body in alignment with the notches.

3. The fan impeller structure of cooling fan as claimed in claim 2 , wherein each enclosure section is positioned between each two adjacent notches.

4. The fan impeller structure of cooling fan as claimed in claim 3 , wherein the flange section is formed with multiple recesses arranged along an outer circumference of the flange section, a protruding tooth being defined between each two adjacent recesses, the protruding teeth being inserted in the corresponding notches of the annular cover body, the enclosure sections being received in the recesses.

5. The fan impeller structure of cooling fan as claimed in claim 1 , wherein the assembling sections are connected in the perforations by means of riveting, screwing or press fit.

6. A fan impeller structure of a cooling fan, comprising:
a blade assembly having multiple blades and an annular cover body, each blade having a front end and a rear end, the annular cover body having multiple insertion slits and multiple assembling sections, the insertion slits being formed on an outer circumference of the annular cover body, the rear ends of the blades being inserted and connected in the corresponding insertion slits, at least one fusion section being formed by fusing and connecting the rear end of each blade and a contact section of one side of the annular cover body in adjacency to a respective insertion slit by laser processing, the assembling sections being formed on one side of the annular cover body in adjacency to the insertion slits; and
a hub having a flange section, multiple perforations, a top wall, and a circumferential wall outward extending from a circumference of the top wall, the flange section outward extending from the circumferential wall, the flange section being correspondingly connected with the annular cover body, the perforations being formed through the flange section and integrally connected with the corresponding assembling sections.

7. The fan impeller structure of cooling fan as claimed in claim 6 , wherein the annular cover body has multiple notches, a top side, a bottom side, and multiple raised sections, the notches being formed on the bottom side of the annular cover body and arranged at intervals, the insertion slits being positioned between the notches, the assembling sections being formed on the bottom side of the annular cover body along an inner circumference of the annular cover body in alignment with the notches, the raised sections upward protruding from two sides of each adjacent insertion slit, the raised sections being positioned between each two adjacent notches.

8. The fan impeller structure of cooling fan as claimed in claim 7 , wherein the flange section is formed with multiple recesses arranged along an outer circumference of the flange section, a protruding tooth being defined between each two adjacent recesses, the protruding teeth being inserted in the corresponding notches of the annular cover body, the raised sections being received in the corresponding recesses.

9. The fan impeller structure of cooling fan as claimed in claim 6 , wherein the assembling sections are connected in the perforations by means of riveting, screwing or press fit.

Assignees

• Asia Vital Components Co Ltd

Inventors

• Xu liang-hua
• Wang Te-Chung

Classifications

• F04D25/08

  the working fluid being air, e.g. for ventilation · CPC title

• F04D29/624

  especially adapted for elastic fluid pumps · CPC title

• F04D29/281 Primary

  for fans or blowers · CPC title

• F04D29/626 Primary

  Mounting or removal of fans · CPC title