SHAFT SUPPORTING MODULE AND OUTER ROTOR TYPE FAN MOTOR HAVING THE SAME

Abstract

Disclosed herein is a shaft supporting module, including: a bearing rotatably supporting a shaft of a fan motor; and a supporting body supporting the bearing, wherein the bearing is formed of a single bearing extended in an axial direction.

Description

CROSS REFERENCE TO RELATED APPLICATION

This application claims the benefit of Korean Patent Application No. 10-2012-0148549 filed on Dec. 18, 2012, entitled “Shaft Supporting Module and Outer Rotor Type Fan Motor Having the Same”, which is hereby incorporated by reference in its entirety into this application.

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates to a shaft supporting module and an outer rotor type fan motor having the same.

2. Description of the Related Art

Since an outer rotor type fan motor according to the prior art should include upper and lower bearing parts in order to support a shaft and should assemble one by one inner components of the bearing part at the time of assembling the fan motor, a structure thereof is complicated, many components are consumed, and high wages are required for the assembly.

In addition, at the time of using a plurality of bearing in order to support the shaft, it is difficult to secure concentricity of the bearing and perpendicularity of the shaft.

PRIOR ART DOCUMENT

Patent Document

(Patent Document 1) Korea Patent Laid-Open Publication No. 2010-0029618

SUMMARY OF THE INVENTION

The present invention has been made in an effort to provide a shaft supporting module capable of securing concentricity of a bearing and perpendicularity of a shaft and an outer rotor type fan motor having the same.

Further, the present invention has been made in an effort to provide a shaft supporting module capable of being easily assembled and an outer rotor type fan motor having the same.

According to a preferred embodiment of the present invention, there is provided a shaft supporting module, including: a bearing rotatably supporting a shaft of a fan motor; and a supporting body supporting the bearing, wherein the bearing is formed of a single bearing extended in an axial direction.

The supporting body may include: a base part; and a bearing receiving part extended in a direction perpendicular to one surface of the base part and having a receiving groove formed in a shape corresponding to the bearing.

In the bearing receiving part, the receiving groove may have a height equal to or greater than that of the bearing.

The base part may be formed in a disk shape and the bearing receiving part may be formed in a cylindrical shape.

The bearing may be formed of a straight bearing.

The bearing may be formed in a cylindrical shape.

According to another preferred embodiment of the present invention, there is provided an outer rotor type fan motor, including: a rotating part including a shaft, a fan coupled to the shaft, and a magnet mounted on the fan; and a fixed part including a bearing rotatably supporting the shaft, a supporting body receiving and supporting the bearing, and an armature mounted so as to face the magnet, wherein the bearing is formed of a single bearing extended in an axial direction.

The armature may include: a core mounted on the supporting body; and a coil wound around the core.

The supporting body may include: a base part; and a bearing receiving part extended in a direction perpendicular to one surface of the base part and having a receiving groove formed in a shape corresponding to the bearing.

In the bearing receiving part, the receiving groove may have a height equal to or greater than that of the bearing.

The base part may be formed in a disk shape and the bearing receiving part may be formed in a cylindrical shape.

The armature may be mounted along an outer side of the bearing receiving part, the magnet may be mounted along an inner peripheral surface of the fan, and the magnet and the armature may be provided at a position spaced from each other by a predetermined distance so as to face each other.

The bearing may be formed of a straight bearing.

The bearing may be formed in a cylindrical shape.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is an exploded perspective view showing a shaft supporting module according to a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view showing the shaft supporting module according to the preferred embodiment of the present invention; and

FIG. 3 is a cross-sectional view showing an outer rotor type fan motor having the shaft supporting module according to the preferred embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The objects, features and advantages of the present invention will be more clearly understood from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same reference numerals are used to designate the same or similar components, and redundant descriptions thereof are omitted. Further, in the following description, the terms “first”, “second”, “one side”, “the other side” and the like are used to differentiate a certain component from other components, but the configuration of such components should not be construed to be limited by the terms. Further, in the description of the present invention, when it is determined that the detailed description of the related art would obscure the gist of the present invention, the description thereof will be omitted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

FIG. 1 is an exploded perspective view showing a shaft supporting module according to a preferred embodiment of the present invention and FIG. 2 is a cross-sectional view showing the shaft supporting module according to the preferred embodiment of the present invention.

Referring to FIGS. 1 and 2, a shaft supporting module 10 according to a preferred embodiment of the present invention includes a bearing 12 rotatably supporting a shaft 31 and a supporting body 11 supporting the bearing 12.

More specifically, the bearing 12 rotatably supports the shaft 31 of an outer rotor type fan motor coupled to an inner peripheral surface of the bearing 12. Here, the bearing 12 has a bearing hole 12a formed in the inner peripheral surface thereof such that the shaft 31 is coupled to the bearing hole 12a. In this case, the bearing 12 is formed of a straight bearing, thereby making it possible to support the shaft 31 using one (a single) bearing without using an additional bearing 12.

In addition, the bearing 12 may be extended in the axial direction so that a length thereof is 3 times or more as compared to the width thereof In this case, the bearing 12 may be formed to have the length which is 10 times or less as compared to the width of the bearing 12. Here, the bearing 12 may be formed in a cylindrical shape, but the shape of the bearing 12 according to the preferred embodiment of the present invention is not limited to the cylindrical shape.

The supporting body 11 has a bearing receiving part 11b receiving the bearing 12 formed at an upper side part thereof and a base part 11a supporting the bearing receiving part 11b formed at a lower side part thereof, thereby making it possible to receive and support the bearing 12.

Here, the base part 11a may be formed in a disk shape and the bearing receiving part 11b may be formed in a cylindrical shape. However, the shapes of the base part 11a and the bearing receiving part 11b according to the preferred embodiment of the present invention are not necessarily limited thereto.

In addition, the bearing receiving part 11b is extended in a direction perpendicular to one surface of the base part 11a, such that a receiving groove 11c receiving the bearing 12 may be formed in an inner peripheral surface of the bearing receiving part 11b. Here, the receiving groove 11c is formed in a shape corresponding to the shape of the bearing 12, thereby making it possible to receive and support the bearing 12. In this case, the receiving groove 11c has a height equal to or greater than that of the bearing 12.

FIG. 3 is a cross-sectional view showing an outer rotor type fan motor having the shaft supporting module according to the preferred embodiment of the present invention.

Referring to FIG. 3, the outer rotor type fan motor 100 according to the preferred embodiment of the present invention includes a rotating part including the shaft 31, a fan 32, and a magnet 33, and a fixed part including the bearing 12, the supporting body 11, and an armature 20.

More specifically, the fan 32 is provided at one end portion of the shaft 31 and a coupling hole or a coupling groove coupled to the shaft 31 is formed at a central portion.

In addition, the fan 32 has a plurality of wings installed at an outer side thereof so as to be spaced apart from each other by a predetermined interval in a peripheral direction.

In addition, the fan 32 may be provided with a receiving part having a lower portion opened so as to receive the magnet 33 and the armature 20.

The magnet 33 is mounted on an inner peripheral surface of the fan 32 so as to face the armature 20. Here, the magnet 33 may be mounted on an inner side of the receiving of the fan 32.

In addition, the magnet 33 and the armature 20 may be provided at a position spaced from each other by a predetermined distance so as to face each other. In this case, the magnet 33 and the armature 20 may be installed at the same height.

Meanwhile, the rotating part 30 of the outer rotor type fan motor 100 according the preferred embodiment of the present invention may further include a case 34 in which the magnet 33 is mounted. Here, the case 34 may have an inner peripheral surface on which the magnet 33 is mounted and an outer peripheral surface mounted on the fan 32, as an example.

However, in the outer rotor type fan motor 100 according the preferred embodiment of the present invention, the shape in which the magnet 33 is mounted in the case 34 is not limited to the example, but the magnet 33 may be received in the case 34, as another example. In this case, the case 34 of another example may include a rotor core receiving the magnet 33.

Referring to FIGS. 1 to 3, the bearing 12 rotatably supports the shaft 31 of the outer rotor type fan motor coupled to the inner peripheral surface of the bearing 12. Here, the bearing 12 has a bearing hole 12a formed in the inner peripheral surface thereof; such that the shaft 31 is coupled to the bearing hole 12a. In this case, the bearing 12 is formed of a straight bearing, thereby making it possible to support the shaft 31 using one (a single) bearing without using an additional bearing 12.

In addition, the bearing 12 may be extended in the axial direction so that a length thereof is 3 times or more as compared to a width thereof In this case, the bearing 12 may be formed to have the length which is 10 times or less as compared to the width of the bearing 12. Here, the bearing 12 may be formed in a cylindrical shape, but the shape of the bearing 12 according to the preferred embodiment of the present invention is not limited to the cylindrical shape.

The supporting body 11 has a bearing receiving part 11b receiving the bearing 12 formed at an upper side part thereof and a base part 11a supporting the bearing receiving part 11b formed at a lower side part thereof; thereby making it possible to receive and support the bearing 12.

Here, the base part 11a may be formed in a disk shape and the bearing receiving part 11b may be formed in a cylindrical shape. However, the shapes of the base part 11a and the bearing receiving part 11b according to the preferred embodiment of the present invention are not necessarily limited thereto.

In addition, the bearing receiving part 11b is extended in a direction perpendicular to one surface of the base part 11a, such that a receiving groove 11c receiving the bearing 12 may be formed in an inner peripheral surface of the bearing receiving part 11b. Here, the receiving groove 11c is formed in a shape corresponding to the shape of the bearing 12, thereby making it possible to receive and support the bearing 12. In this case, the receiving groove 11c has a height equal to or greater than that of the bearing 12.

Referring to FIG. 3, the armature 20 includes a core 21 mounted on the supporting body 11 and a coil 22 wound around the core 21.

Here, the core 21 is mounted on the bearing receiving part 11b of the supporting body 11 and may be mounted along the outer side of the bearing receiving part 11b. Meanwhile, the core 21 may have a hole formed at the central portion thereof so as to be inserted into the bearing receiving part 11b.

In addition, the outer rotor type fan motor 100 according to the preferred embodiment of the present invention may further include a printed circuit board (PCB) 40. Here, the PCB 40 may be formed in a plate shape so as to be mounted on the supporting body 11 of the supporting part 10.

The shaft supporting module 10 and the outer rotor type fan motor 100 having the shaft supporting module 10 according to the preferred embodiment of the present invention configured as described above support the shaft 31 using the bearing extended in the axial direction and receive and support the bearing 12 using the supporting body 11 formed in the shape corresponding to the bearing 12, thereby making it possible to easily secure concentricity of the bearing 12 and perpendicularity of the shaft 31.

In addition, as described above, the shaft 31 may be supported by the single bearing 12 without adding the bearing 12 supporting the shaft 31, such that a structure may become simple and the number of components may be decreased. As a result, wages may be decreased and a cost material may be decreased.

In addition, since the shaft 31 may be supported by the single bearing 12, the problem that it is difficult to secure concentricity of each of the plurality of bearings 12 and secure perpendicularity of the shaft 31 in the structure in which the shaft 31 is supported by the plurality of bearings 12 according to the prior art may be solved.

According to the preferred embodiment of the present invention, the bearing supporting the shaft is formed of a single bearing extended in an axial direction of the shaft, such that concentricity of the bearing and perpendicularity of the shaft may be easily secured and the number of components supporting the bearing may be decreased. In addition, costs required for the assembly may be significantly decreased and manufacturing costs may be decreased.

Although the embodiments of the present invention have been disclosed for illustrative purposes, it will be appreciated that the present invention is not limited thereto, and those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention.

Accordingly, any and all modifications, variations or equivalent arrangements should be considered to be within the scope of the invention, and the detailed scope of the invention will be disclosed by the accompanying claims.

Claims

1. A shaft supporting module, comprising:

a bearing rotatably supporting a shaft of a fan motor; and

a supporting body supporting the bearing,

wherein the bearing is formed of a single bearing extended in an axial direction.

2. The shaft supporting module as set forth in claim 1, wherein the supporting body includes:

a base part; and

a bearing receiving part extended in a direction perpendicular to one surface of the base part and having a receiving groove formed in a shape corresponding to the bearing.

3. The shaft supporting module as set forth in claim 2, wherein in the bearing receiving part, the receiving groove has a height equal to or greater than that of the bearing.

4. The shaft supporting module as set forth in claim 2, wherein the base part is formed in a disk shape and the bearing receiving part is formed in a cylindrical shape.

5. The shaft supporting module as set forth in claim 1, wherein the bearing is formed of a straight bearing.

6. The shaft supporting module as set forth in claim 1, wherein the bearing is formed in a cylindrical shape.

7. An outer rotor type fan motor, comprising:

a rotating part including a shaft, a fan coupled to the shaft, and a magnet mounted on the fan; and

a fixed part including a bearing rotatably supporting the shaft, a supporting body receiving and supporting the bearing, and an armature mounted so as to face the magnet,

wherein the bearing is formed of a single bearing extended in an axial direction.

8. The outer rotor type fan motor as set forth in claim 7, wherein the armature includes:

a core mounted on the supporting body; and

a coil wound around the core.

9. The outer rotor type fan motor as set forth in claim 7, wherein the supporting body includes:

a base part; and

a bearing receiving part extended in a direction perpendicular to one surface of the base part and having a receiving groove formed in a shape corresponding to the bearing.

10. The outer rotor type fan motor as set forth in claim 9, wherein in the bearing receiving part, the receiving groove has a height equal to or greater than that of the bearing.

11. The outer rotor type fan motor as set forth in claim 9, wherein the base part is formed in a disk shape and the bearing receiving part is formed in a cylindrical shape.

12. The outer rotor type fan motor as set forth in claim 9, wherein the armature is mounted along an outer side of the bearing receiving part,

the magnet is mounted along an inner peripheral surface of the fan, and

the magnet and the armature are provided at a position spaced from each other by a predetermined distance so as to face each other.

13. The outer rotor type fan motor as set forth in claim 7, wherein the bearing is formed of a straight bearing.

14. The outer rotor type fan motor as set forth in claim 7, wherein the bearing is formed in a cylindrical shape.