Fan, motor and bearing structure thereof

Abstract

A bearing structure which is cooperated with a shaft and is disposed in a bearing tube comprises an oil bearing and a cylindrical sealing member. The oil bearing has an axial hole. The shaft passes through the axial hole. The cylindrical sealing member covers a top surface and at least a portion of a sidewall of the oil bearing. The cylindrical sealing member has a through hole defined in its center. The shaft passes through the through hole.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will become more fully understood from the detailed description given herein below illustration only, and thus is not limitative of the present invention, and wherein:

FIG. 1 is a schematic illustration showing a conventional oil bearing cooperated with a shaft;

FIG. 2 is a schematic illustration showing the oil bearing of FIG. 1 having a top surface on which a sealing baffle is disposed;

FIG. 3 is a schematic illustration showing a bearing structure cooperated with a shaft and a bearing tube according to a first embodiment of the invention;

FIGS. 4A and 4B are schematic illustrations showing different aspects of a cylindrical sealing member of the bearing structure of FIG. 3;

FIG. 5 is another schematic illustration showing the bearing structure of FIG. 3 having a groove formed on an inner wall of a through hole of the cylindrical sealing member;

FIG. 6 is a schematic illustration showing a cover disposed on the bearing structure of FIG. 3;

FIG. 7 is a schematic illustration showing at least one protrusion formed on the inner wall of the cylindrical sealing member of the bearing structure of FIG. 3;

FIG. 8 is a schematic illustration showing a bearing structure cooperated with a shaft and a bearing tube according to a second embodiment of the invention;

FIG. 9 is a schematic illustration showing a motor according to the preferred embodiment of the invention; and

FIG. 10 is a schematic illustration showing a fan according to the preferred embodiment of the invention.

Claims

1. A bearing structure disposed in a bearing tube, comprising: an oil bearing having an axial hole for being passed through by a shaft; anda sealing member covering a top surface of the oil bearing and at least a portion of a sidewall of the oil bearing, wherein the sealing member has a through hole for being passed through by the shaft.

2. The bearing structure according to claim 1, further comprising a cover disposed on the sealing member.

3. The bearing structure according to claim 2, wherein an inner wall of the through hole is formed with at least one groove.

4. The bearing structure according to claim 2, wherein the cover rests against the sealing member to form a space between the cover and the sealing member.

5. The bearing structure according to claim 2, wherein the cover is telescoped onto a sidewall of the bearing tube.

6. The bearing structure according to claim 5, wherein the cover contacts at least one portion of an outer wall of the sealing member and/or at least one portion of a top surface of the sealing member.

7. The bearing structure according to claim 5, wherein the cover is disposed adjacent to a concave portion of the shaft.

8. The bearing structure according to claim 1, wherein the sealing member comprises a stepped portion to define a space between the sealing member and the top surface of the oil bearing.

9. The bearing structure according to claim 1, wherein an inner wall of the sealing structure has at least one protrusion resting against the sidewall of the oil bearing.

10. The bearing structure according to claim 1, wherein the sidewall of the oil bearing has at least one protrusion resting against the sidewall of the bearing.

11. The bearing structure according to claim 1, wherein the bearing structure is applied in a fan or motor.

12. A bearing structure disposed in a bearing tube, comprising: an oil bearing having an axial hole for being passed through by a shaft; anda sealing member covering a top surface of the oil bearing, wherein the sealing member has a through hole for being passed through by the shaft.

13. The bearing structure according to claim 12, further comprising a cover disposed on the sealing member.

14. The bearing structure according to claim 13, wherein an inner wall of the through hole is formed with at least one groove.

15. The bearing structure according to claim 13, wherein the cover rests against the sealing member to form a space between the cover and the sealing member.

16. The bearing structure according to claim 13, wherein the cover is telescoped onto a sidewall of the bearing tube.

17. The bearing structure according to claim 16, wherein the cover contacts at least one portion of an outer wall of the sealing member and/or at least one portion of a top surface of the sealing member.

18. The bearing structure according to claim 16, wherein the cover is disposed adjacent to a concave portion of the shaft.

19. The bearing structure according to claim 12, wherein a bottom portion of the bearing tube has a wear-resisting structure resting against the shaft.

20. The bearing structure according to claim 12, wherein the bearing structure is applied in a fan or motor.