FAN STRUCTURE AND IMPELLER THEREOF
A fan structure at least includes a cap, an impeller, a bearing and a fixing shaft, wherein the cap comprises a bottom portion, a body and an accommodating space. The impeller comprises a hub and a coupling base having a ring wall and an accommodating slot. The bearing couples to the accommodating slot, and the fixing shaft penetrates through an axial hole of the bearing. The ring wall of the coupling base comprises at least one guidance hole exposing the fixing shaft. The guidance hole is in communication with the accommodating space and the accommodating slot. The lubricants can be collected inside the accommodating space of the cap through the guidance of the guidance hole to prevent the lubricants from leakage when the impeller is in rotation.
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The present invention is generally related to a fan structure, which particularly relates to the fan structure with a guidance passage utilized for guiding lubricants back to a bearing.
BACKGROUND OF THE INVENTIONWith reference to
The primary object of the present invention is to provide a fan structure, wherein lubricants can be collected inside an accommodating space of a cap through a guidance hole of an impeller for preventing lubricants from leakage when the impeller is in rotation.
A fan structure in the present invention includes a cap, an impeller, a bearing and a fixing shaft, wherein the cap comprises a body and an accommodating space surrounded by the body. The impeller comprises a hub and a coupling base having a ring wall coupled to the hub and an accommodating slot surrounded by the ring wall, wherein the ring wall comprises at least one guidance hole communicated with the accommodating space of the cap and the accommodating slot of the coupling base. The bearing is coupled to the accommodating slot of the coupling base and comprises an axial hole. The fixing shaft penetrates the axial hole and is revealed by the guidance hole of the ring wall. When the impeller is in rotation, lubricants flow upwardly along the ring wall of the coupling base or the fixing shaft. Through effect of centrifugal force, lubricants can be collected inside the accommodating space of the cap by passing through the guidance hole of the ring wall so as to prevent lubricants from splashing and leakage when the impeller is in rotation.
With reference to
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A second embodiment of the present invention is illustrated in
A third embodiment of the present invention is illustrated in
A fourth embodiment of the present invention is illustrated in
A fifth embodiment of the present invention is illustrated in
In each embodiment of the present invention, the flowing path of lubricants can be changed through the guidance hole 128 of the ring wall 124 via centrifugal force, thereafter, lubricants can be collected inside the accommodating space 112 of the cap 110 by passing through the guidance hole 128, which prevents lubricants from splashing from the coupling base 123, the hub 121 or the cap 110 to avoid loss of lubricants. Furthermore, the lubricants gathered inside the accommodating space 112 of the cap 110 can repeatedly lubricate the bearing 130 so that a lubricant reclamation function can be achieved.
While this invention has been particularly illustrated and described in detail with respect to the preferred embodiments thereof, it will be clearly understood by those skilled in the art that it is not limited to the specific features and describes and various modifications and changes in form and details may be made without departing from the spirit and scope of this invention.
Claims
1. A fan structure including:
- a cap having a body and an accommodating space surrounded by the body;
- an impeller having a hub and a coupling base, the coupling base comprises a ring wall coupled to the hub and an accommodating slot surrounded by the ring wall, wherein the ring wall accommodated within the accommodating space of the cap comprises at least one guidance hole communicated with the accommodating space of the cap and the accommodating slot of the coupling base;
- a bearing coupled to the accommodating slot of the coupling base and having an axial hole; and
- a fixing shaft penetrating the axial hole, wherein the guidance hole of the ring wall reveals the fixing shaft.
2. The fan structure in accordance with claim 1, wherein the ring wall comprises a top surface and a bottom surface, and the guidance hole is located between the top surface and the bottom surface.
3. The fan structure in accordance with claim 2, wherein the guidance hole is recessed to the bottom surface.
4. The fan structure in accordance with claim 2, wherein the guidance hole is recessed to the top surface.
5. The fan structure in accordance with claim 1, wherein the bearing comprises a penetration hole communicated with the guidance hole of the ring wall and the axial hole, and the fixing shaft is revealed by the penetration hole.
6. The fan structure in accordance with claim 5 further includes a guidance passage composed of the penetration hole of the bearing and the guidance hole of the ring wall.
7. The fan structure in accordance with claim 5, wherein the bearing further comprises an outer ring surface formed in a ladder shape, the outer ring surface comprises a first surface and a second surface, and the first surface is spaced apart from the ring wall to define an oil storage space communicated with the penetration hole of the bearing and the guidance hole of the ring wall.
8. The fan structure in accordance with claim 3, wherein the body of the cap comprises a top edge, and the guidance hole of the ring wall comprises an upper surface lower than the top edge.
9. The fan structure in accordance with claim 4, wherein the body of the cap comprises a top edge, and the guidance hole of the ring wall comprises an lower surface lower than the top edge.
10. An impeller of a fan structure including:
- a hub; and
- a coupling base having a ring wall coupled to the hub and an accommodating slot surrounded by the ring wall, wherein the ring wall comprises an inner surface, an outer surface and at least one guidance hole communicated with the inner surface and the outer surface.
11. The impeller of a fan structure in accordance with claim 10, wherein the ring wall comprises a top surface and a bottom surface, and the guidance hole is located between the top surface and the bottom surface.
12. The impeller of a fan structure in accordance with claim 11, wherein the guidance hole is recessed to the bottom surface.
13. The impeller of a fan structure in accordance with claim 11, wherein the guidance hole is recessed to the top surface.
14. A fan structure including:
- an impeller having a hub and a coupling base, the coupling base comprises a ring wall coupled to the hub and an accommodating slot surrounded by the ring wall, wherein the ring wall comprises an inner surface, an outer surface and at least one guidance hole communicated with the inner surface and the outer surface;
- a bearing coupled to the accommodating slot of the coupling base and having an axial hole; and
- a fixing shaft penetrating the axial hole, the fixing shaft is revealed by the guidance hole of the ring wall.
15. The fan structure in accordance with claim 14, wherein the ring wall comprises a top surface and a bottom surface, and the guidance hole is located between the top surface and the bottom surface.
16. The fan structure in accordance with claim 15, wherein the guidance hole is recessed to the bottom surface.
17. The fan structure in accordance with claim 15, wherein the guidance hole is recessed to the top surface.
18. The fan structure in accordance with claim 14, wherein the bearing comprises a penetration hole communicated with the guidance hole of the ring wall and the axial hole, and the fixing shaft is revealed by the penetration hole.
19. The fan structure in accordance with claim 18 further includes a guidance passage composed of the penetration hole of the bearing and the guidance hole of the ring wall.
20. The fan structure in accordance with claim 18, wherein the bearing further comprises an outer ring surface formed in a ladder shape, the outer ring surface includes a first surface and a second surface, and the first surface is spaced apart from the ring wall to define an oil storage space communicated with the penetration hole of the bearing and the guidance hole of the ring wall.
Type: Application
Filed: Jul 12, 2012
Publication Date: Jan 16, 2014
Applicant: ADDA CORP. (Pingtung County)
Inventor: Mao-Sheng Lin (Pingtung County)
Application Number: 13/547,216
International Classification: F04D 17/00 (20060101); F04D 29/28 (20060101); F04D 29/056 (20060101);