Adjustable and stable pre-loading device equipped fan

• US 20020031428A1
• Filed: 08/09/2001
• Published: 03/14/2002
• Est. Priority Date: 09/08/2000
• Status: Active Grant

• Current Assignee: Delta Electronics Incorporated
• Original Assignee: Delta Electronics Incorporated
• Inventors: Li, Chien-Chung
• Granted Patent: US 6,565,316 B2
• Time in Patent Office: Days
• US Class Current: 415/229
• CPC Class Codes: F04D 29/059 Roller bearings
• CPC Class Codes: F16C 2360/46 Fans, e.g. ventilators
• CPC Class Codes: F16C 25/083 with resilient means acting axially on a race ring to preload the bearing

Abstract

An adjustable and stable pre-loading device equipped fan includes a stator, a first rigid spacer, a first bearing, an elastic device, a second bearing, a second rigid spacer a rotor and a shift. Among these, the stator includes a receptacle. The first bearing is formed on the first rigid spacer in the receptacle. The elastic device is formed in the receptacle and further on the first bearing. The second rigid spacer is formed on the second bearing on the elastic device. The rotor is coupled to the stator and has a blade structure. The first rigid space compresses the elastic device by means of the first bearing. The second rigid space compresses the elastic device by means of the second bearing. The distance between the first rigid spacer and the second rigid spacer is adjustable, thereby altering pre-loading applied on the first bearing and the second bearing.

Claims

1. An adjustable and stable pre-loading device equipped fan, comprising:

a stator, including a receptacle;

a first rigid spacer, formed in said receptacle;

a first bearing, formed in said receptacle and further on said first rigid spacer;

an elastic device, formed in the receptacle and further on said first bearing;

a second bearing, formed in the receptacle and further on said elastic device;

a second rigid spacer, formed in said receptacle and further on said second bearing;

a rotor, coupled to said stator and having a blade structure;

a shift, having a first terminal, an opposite second terminal and a middle section, said first terminal coupled to said rotor, said middle section passing through said first rigid spacer, said second rigid spacer and said elastic device and then coupled to said first bearing and said second bearing;

wherein said first rigid space compressing said elastic device by means of said first bearing, said second rigid space compressing said elastic device by means of said second bearing, a distance between said first rigid spacer and said second rigid spacer is adjustable, thereby altering pre-loading applied on said first bearing and said second bearing.

2. The adjustable and stable pre-loading device equipped fan according to claim 1, wherein said first rigid spacer and said second rigid spacer are coupled to said receptacle by mans of a thread, respectively.

3. The adjustable and stable pre-loading device equipped fan according to claim 1, wherein said second terminal passing through said receptacle is secured to said stator by a fastening.

4. The adjustable and stable pre-loading device equipped fan according to claim 3, wherein said fastening comprises a C-ring.

5. The adjustable and stable pre-loading device equipped fan according to claim 1, wherein said first bearing further comprising:

an inner ring;

a plurality of balls; and

an outer ring, coupled to said inner ring by means of said balls.

6. The adjustable and stable pre-loading device equipped fan according to claim 5, wherein said middle section is coupled to said inner ring of said first bearing.

7. The adjustable and stable pre-loading device equipped fan according to claim 1, wherein said first bearing further comprising:

an inner ring;

a plurality of balls; and

an outer ring, coupled to said inner ring by means of said balls.

8. The adjustable and stable pre-loading device equipped fan according to claim 7, wherein said middle section is coupled to said inner ring of said second bearing.

9. The adjustable and stable pre-loading device equipped fan according to claim 1, wherein said elastic device comprises a spring.

10. The adjustable and stable pre-loading device equipped fan according to claim 5, 7 and 9, wherein said spring is coupled to said inner ring of said first bearing and said inner ring of said second bearing.