Fan bearing retaining structure

Patent metadata

Field	Value
Publication number	US-9097260-B2
Application number	US-201213472160-A
Country	US
Kind code	B2
Filing date	May 15, 2012
Priority date	May 15, 2012
Publication date	Aug 4, 2015
Grant date	Aug 4, 2015

Abstract

A fan bearing retaining structure includes a base and a ring member. The base has a bearing cup projected from one side thereof, and the bearing cup internally defines an axial bore for receiving a bearing therein. The ring member is fitted around an outer side of the bearing cup and defines an opening, such that an inner side of the opening tightly contacts with the outer side of the bearing cup to apply a radially inward compression toward the axial bore. With these arrangements, a portion of the axial bore corresponding to the ring member fitted around the bearing cup has a reduced inner diameter to thereby effectively retain the bearing in the bearing cup, enabling a fan to be manufactured at reduced cost.

First claim

What is claimed is:

1. A fan bearing retaining structure, comprising:
a base having a bearing cup projected from one side thereof, and the bearing cup internally defining an axial bore for receiving a bearing therein; and
a ring member defining an opening therein, and being fitted around the bearing cup with an inner side of the opening tightly contacting with an outer side of the bearing cup to apply and keep a radially inward compression to the axial bore;
wherein the bearing cup has a first end fixedly connected to a center of the base and a second end formed by axially and obliquely outward extending from the center of the base; and the ring member being fitted around the bearing cup at the second end such that the second end can keep a radially inward compression to the axial bore; and
wherein the first end of the bearing cup has an inner diameter smaller than that of the second end.

2. The fan bearing retaining structure as claimed in claim 1 , wherein the bearing cup is substantially forward tapered in shape.

3. The fan bearing retaining structure as claimed in claim 1 , wherein the ring member further includes a plurality of protrusions radially inward extended from the inner side of the opening toward a center of the opening for tightly pressing against the outer side of the bearing cup to apply the radially inward compression toward the axial bore.

4. The fan bearing retaining structure as claimed in claim 1 , wherein the ring member is made of a material selected from the group consisting of metal materials, plastic materials, and polymeric materials.

5. The fan bearing retaining structure as claimed in claim 1 , wherein the first end of the bearing cup has an inner diameter larger than that of the second end.

6. The fan bearing retaining structure as claimed in claim 1 , wherein the fan bearing retaining structure is applied to a fan that includes a frame, a rotor and a stator; the base being arranged in the frame with the rotor rotatably connected thereto; and the stator being fitted around the outer side of the bearing cup to adjoin the ring member.

7. The fan bearing retaining structure as claimed in claim 3 , wherein the protrusions are equally spaced along the inner side of the opening of the ring member.

8. The fan bearing retaining structure as claimed in claim 3 , wherein the protrusions are irregularly spaced along the inner side of the opening of the ring member.

9. The fan bearing retaining structure as claimed in claim 1 , wherein a circumferential edge of the second end of the bearing cup is provided with at least one axially cut to facilitate convenient and tight fitting of the ring member around the second end of the bearing cup.

Assignees

• Chou Chu-Hsien
• Hong Shao-Jun
• Asia Vital Components Co Ltd

Inventors

• Chou Chu-Hsien
• Hong Shao-Jun

Classifications

• F04D29/04 Primary

  Shafts or bearings, or assemblies thereof (specially adapted for elastic fluid pumps F04D29/05) · CPC title

• F04D29/046

  Bearings · CPC title

• F04D25/0613

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

• F04D29/056

  Bearings · CPC title

• F04D25/062 Primary

  Details of the bearings · CPC title