Ceiling fan motor

Abstract

The ceiling fan motor of the present invention comprises: an upper housing (11) having a shaft through hole (111) located at the center and an upper step portion slot (113) surrounding the lower circumference; a lower housing (12) having a lower step portion slot (122) surrounding the upper circumference; a yoke assembly (20) comprising an annular ring yoke (21) and a plurality of magnets (22) connected to the inside of the ring yoke (21); and a stator assembly (30) comprising a stator core (31) and a hollow shaft (34) passing through the shaft through hole (111) and coupled to a shaft coupling member (31A) formed at the center of the stator core (31), wherein an upper step portion (211) protruding upward from the magnet (22) of the ring yoke (21) is coupled to the upper step portion slot (113), and a lower step portion (213) protruding downward from the magnet (22) of the ring yoke (21) is coupled to the lower step portion slot (122).

Description

Technical Field

[0001] The present invention relates to a ceiling fan motor, and more particularly to a ceiling fan motor having a structure that is convenient for assembling a rotor and can stably support the motor. Background Art

[0002] Typically, a ceiling fan motor is an electrical appliance mounted on the ceiling of a room that rotates a fan to facilitate air circulation. Ceiling fan motors can take a variety of structural forms, and generally consist of a stationary stator assembly and a rotating rotor assembly mounted with fan blades.

[0003] The ceiling fan motor is suspended from the ceiling and rotates, so its structure should be able to bear the weight of the motor and the ceiling fan itself. In US Patent Publication 2012 / 0043843 and US Patent 7,157,872, a conventional ceiling fan motor is disclosed. In the structure of the conventional ceiling fan motor, the stator is enclosed inside the rotor, the stator is fixed to the ceiling, and the rotor rotates, and the rotor includes a plurality of magnets mounted on the inner wall of the rotor housing. The rotor housing is usually made of metal, but it may also be made of plastic resin in consideration of manufacturing cost or assemblability.

[0004] Korean Patent No. 10-1629829 discloses a method of manufacturing a rotor housing by injection molding using plastic. However, the rotor housing manufactured by injection molding may generate vibrations when rotating due to poor assembly quality. In addition, each magnet needs to be individually mounted on the rotor housing, which reduces assemblability.

[0005] In order to solve the above problems, the inventor proposes a ceiling fan motor with a novel structure. Summary of the invention

[0006] Technical issues

[0007] An object of the present invention is to provide a ceiling fan motor having a firmly coupled housing structure, thereby ensuring greater stability and improving assemblability when operating the motor.

[0008] Another object of the present invention is to provide a ceiling fan motor that is convenient for assembling magnets.

[0009] The above objects as well as other objects inferred therein can be easily achieved through the following explanation of the present invention.

[0010] Means of solving the problem

[0011] The ceiling fan motor of the present invention includes: an upper shell 11, having an axial through hole 111 located in the center and an upper step portion slot 113 around the lower circumference; a lower shell 12, having a lower step portion slot 122 around the upper circumference; a yoke assembly 20, including an annular ring yoke 21 and a plurality of magnets 22 connected to the inside of the ring yoke 21; and a stator assembly 30, including a stator core 31 and a hollow shaft 34 passing through the axial through hole 111 and coupled to a shaft coupling 31A formed in the center of the stator core 31, wherein the upper step portion 211 protruding upward from the magnet 22 of the ring yoke 21 is coupled to the upper step portion slot 113, and the lower step portion 213 protruding downward from the magnet 22 of the ring yoke 21 is coupled to the lower step portion slot 122.

[0012] In the present invention, the ceiling fan motor may further include a plurality of upper protrusions 212 protruding upward from the upper step portion 211 , wherein the upper protrusions 212 are coupled to upper protrusion slots 114 formed in the upper step portion slots 113 .

[0013] In the present invention, the ceiling fan motor may further include a plurality of lower protrusions 214 protruding downward from the lower step portion 213 , wherein the lower protrusions 214 are coupled to lower protrusion slots 123 formed in the lower step portion slots 122 .

[0014] In the present invention, it is preferred that a plurality of upper coupling members 11A are installed around the upper housing 11 by insert molding, and lower coupling members 12A are installed at positions corresponding to the upper coupling members 11A in the lower housing 12 by insert molding.

[0015] In the present invention, a fan coupling hole 11C for coupling a ceiling fan blade may be formed in the upper coupling member 11A.

[0016] Effects of the Invention

[0017] The present invention provides a ceiling fan motor with a firmly coupled housing structure, thereby ensuring greater stability when operating the motor and improving the assemblability of the housing, facilitating magnet assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a perspective view of a ceiling fan motor according to the present invention.

[0019] Figure 2 It is an exploded perspective view of the ceiling fan motor of the present invention.

[0020] Figure 3 It is a perspective view of a yoke assembly of a ceiling fan motor according to the present invention.

[0021] Figure 4 It is an exploded perspective view of the upper housing and the yoke assembly of the ceiling fan motor of the present invention.

[0022] Figure 5 It is an exploded perspective view of the lower housing and the yoke assembly of the ceiling fan motor of the present invention.

[0023] Figure 6 It is a perspective view of the coupling state of the lower housing and the yoke assembly of the ceiling fan motor of the present invention.

[0024] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] Figure 1 is a perspective view of a ceiling fan motor 100 of the present invention, Figure 2 FIG. 1 is an exploded perspective view of the ceiling fan motor 100 of the present invention. Figure 1 and Figure 2 As shown, the ceiling fan motor 100 of the present invention includes a housing assembly 10 , a yoke assembly 20 and a stator assembly 30 .

[0026] The housing assembly 10 includes an upper housing 11 and a lower housing 12 coupled to each other. An upper bearing bracket 13 is installed at the inner center of the upper housing 11, and a lower bearing bracket 14 is installed at the inner center of the lower housing 12. An upper bearing 15 is coupled to the upper bearing bracket 13, and a lower bearing 16 is coupled to the lower bearing bracket 14. A plurality of upper coupling members 11A are installed around the upper housing 11, and a lower coupling member 12A is installed in the lower housing 12 at a position corresponding to the upper coupling member 11A. The accompanying drawings show three upper coupling members 11A, but the number is not necessarily limited. Four or more upper coupling members 11A may be installed as needed.

[0027] The yoke assembly 20 includes a magnetic ring yoke 21 and a plurality of magnets 22 connected to the inner circumferential surface of the ring yoke 21. The number of magnets 22 is not particularly limited, and different numbers of magnets 22 can be used according to the number of motor poles. The yoke assembly 20 is coupled to the inner circumferential surfaces of the upper shell 11 and the lower shell 12.

[0028] The stator assembly 30 includes a stator core 31, an upper insulator 32 and a lower insulator 33 (coupled to the upper and lower parts of the stator core 31, respectively), and a hollow shaft 34 (coupled to the shaft coupling 31A at the center of the stator core 31 and fixed to the ceiling). A lead wire (not shown) for supplying power to the stator core 31 is pulled to the outside through the inner space of the hollow shaft 34. The housing assembly 10 rotates due to the rotational force applied to the yoke assembly 20, and an electromagnetic field is generated when power is supplied to the fixed stator assembly 30, and the electromagnetic field generates a rotational force. The ceiling fan blades (not shown) are coupled to the housing assembly 10 to rotate the fan to circulate indoor air.

[0029] Figure 3 FIG. 2 is a perspective view of the yoke assembly 20 of the ceiling fan motor 100 of the present invention. Figure 3 The yoke assembly 20 of the present invention includes a ring yoke 21 and a plurality of magnets 22 connected to the inner circumferential surface of the ring yoke 21 .

[0030] The yoke 21 is made by bending a slender rectangular strip magnetic body, and is annular by forming a portion in a protruding groove shape at both ends of the rectangular strip and the ends are coupled to each other. The protruding groove-shaped portion is called the end coupling portion 21A. A plurality of magnets 22 are connected to the inner circumferential surface of the yoke 21. The magnet 22 is configured to have a height smaller than the height of the yoke 21 so that the yoke 21 and the magnet 22 can be stepped relative to each other in the upper and lower parts of the magnet 22.

[0031] In terms of the height of the magnet 22, the upwardly protruding portion of the yoke 21 is the upper step portion 211, and the downwardly protruding portion is the lower step portion 213. The upper step portion 211 is coupled to the upper step portion slot 113 of the upper housing 11, and the lower step portion 213 is coupled to the lower step portion slot 122 of the lower housing 12.

[0032] The upper portion of the upper step portion 211 is provided with a plurality of upper protrusions 212 protruding upward, and the lower portion of the lower step portion 213 is provided with a plurality of lower protrusions 214 protruding downward. When the yoke assembly 20 is coupled to the upper shell 11 and the lower shell 12, respectively, the upper protrusions 212 and the lower protrusions 214 may help fix the yoke assembly 20 in an accurate position, and may also strengthen the coupling force between the yoke assembly 20 and the upper shell 11 and the lower shell 12.

[0033] Figure 4 FIG. 1 is an exploded perspective view of the upper housing 11 and the yoke assembly 20 of the ceiling fan motor 100 of the present invention. Figure 5 FIG. 1 is an exploded perspective view of the lower housing 12 and the yoke assembly 20 of the ceiling fan motor 100 of the present invention. Figure 6 It is a perspective view of the coupling state of the lower housing 12 and the yoke assembly 20 of the ceiling fan motor 100 of the present invention.

[0034] Also refer to Figure 4 and Figure 6 The ceiling fan motor 100 of the present invention has the following structure: the yoke assembly 20 is coupled to the upper housing 11 and the lower housing 12, respectively. A shaft through hole 111 is formed at the inner center of the upper housing 11, a hollow shaft 34 passes through the shaft through hole 111, and an upper bearing insertion portion 112 protruding downward is formed around the shaft through hole 111. An upper bearing bracket 13 is installed in the upper bearing insertion portion 112. If the upper housing 11 is formed by insert injection molding in a state where the upper bearing bracket 13 is located in the mold, it is preferred to mold the upper housing 11 so that the upper bearing bracket 13 is installed in the upper bearing insertion portion 112.

[0035] An upper step portion slot 113 is formed around the inner circumference of the upper housing 11, and the upper step portion slot 113 is coupled with the upper step portion 211 in the ring yoke 21. An upper protrusion portion slot 114 is formed in the upper step portion slot 113 at a position corresponding to the upper protrusion 212 of the ring yoke 21. By coupling the upper step portion 211 and the upper protrusion 212 of the ring yoke 21 to the upper step portion slot 113 and the upper protrusion slot 114 of the upper housing 11, respectively, the upper side of the yoke assembly 20 is coupled to the upper housing 11.

[0036] A plurality of upper coupling members 11A are installed around the lower circumference of the upper housing 11. An upper coupling hole 11B is formed in the upper coupling member 11A, and a bolt (not shown) for coupling the upper housing 11 and the lower housing 12 is inserted into the upper coupling hole 11B. In addition, a fan coupling hole 11C for coupling a ceiling fan blade is formed in the upper coupling member 11A. If the upper housing 11 is manufactured by insert injection molding in a state where the upper coupling members 11A are located in a mold, it is preferable to mold the upper housing 11 so that the upper coupling members 11A are installed in the upper housing 11.

[0037] A lower bearing insert portion 121 protruding upward is formed in the inner center of the lower housing 12. A lower bearing bracket 14 is installed in the lower bearing insert portion 121. If the lower housing 12 is manufactured by insert injection molding in a state where the lower bearing bracket 14 is located in the mold, the lower housing 12 may be preferably molded so that the lower bearing bracket 14 is installed in the lower bearing insert portion 121.

[0038] A lower step portion slot 122 is formed around the inner circumference of the lower housing 12, and the lower step portion slot 122 is coupled with the lower step portion 213 in the ring yoke 21, and a lower protrusion slot 123 is formed in the lower step portion slot 122 at a position corresponding to the lower protrusion 214 of the ring yoke 21. By coupling the lower step portion 213 and the lower protrusion 214 of the ring yoke 21 to the lower step portion slot 122 and the lower protrusion slot 123 of the lower housing 12, respectively, the lower side of the yoke assembly 20 is coupled to the lower housing 12.

[0039] A plurality of lower coupling members 12A are installed around the upper circumference of the lower housing 12. A lower coupling hole 12B is formed in the lower coupling member 12A at a position corresponding to the upper coupling hole 11B, and a bolt (not shown) for coupling the upper housing 11 and the lower housing 12 is inserted into the lower coupling hole 12B. If the lower housing 12 is formed by insert molding in a state where the lower coupling members 12A are located in a mold, it is preferable to mold the lower housing 12 so that the lower coupling members 12A are installed in the lower housing 12.

[0040] The above specific embodiments simply explain examples that help understand the present invention, but are not intended to limit the scope of the present invention. The scope of the present invention is limited by the scope of the attached invention claims. In addition, it should be understood that simple modifications or changes to the present invention are within the scope of the present invention.

Claims

1. A ceiling fan motor, It is characterized in that include: An upper housing (11) having a shaft through hole (111) located at the center and an upper step portion slot (113) around the lower circumference; A lower housing (12) having a lower step portion slot (122) around an upper circumference; a yoke assembly (20) coupled to the inner circumferential surfaces of the upper shell (11) and the lower shell (12), comprising an annular yoke (21) and a plurality of magnets (22) connected to the inner circumferential surface of the yoke (21); and A stator assembly (30) includes a stator core (31) and a hollow shaft (34) passing through an axis through hole (111) and coupled to an axis coupling member (31A) formed at the center of the stator core (31). A plurality of upper coupling members (11A) are installed around the upper shell (11), and a lower coupling member (12A) is installed at a position corresponding to the upper coupling member (11A) in the lower shell (12), so that the upper shell (11) and the lower shell (12) are coupled to each other. An upper step portion (211) protruding upward from a magnet (22) of the ring yoke (21) is coupled to an upper step portion slot (113), and a lower step portion (213) protruding downward from a magnet (22) of the ring yoke (21) is coupled to a lower step portion slot (122). The ceiling fan motor further comprises a plurality of upper protrusions (212) protruding upward from the upper step portion (211), wherein the upper protrusions (212) are coupled to upper protrusion slots (114) formed in the upper step portion slots (113), The ceiling fan motor further comprises a plurality of lower protrusions (214) protruding downward from the lower step portion (213), wherein the lower protrusions (214) are coupled to lower protrusion slots (123) formed in the lower step portion slot (122).

2. The ceiling fan motor according to claim 1, It is characterized in that A plurality of upper coupling components (11A) are installed around the upper housing (11) by insert injection molding, and a lower coupling component (12A) is installed in a position corresponding to the upper coupling components (11A) in the lower housing (12) by insert injection molding.

3. The ceiling fan motor according to claim 2, It is characterized in that A fan coupling hole (11C) for coupling a ceiling fan blade is formed in the upper coupling member (11A).

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