KR20140065512A

KR20140065512A - Fan motor

Info

Publication number: KR20140065512A
Application number: KR1020120129452A
Authority: KR
Inventors: 박현각; 이기영; 임정규
Original assignee: 삼성전기주식회사
Priority date: 2012-11-15
Filing date: 2012-11-15
Publication date: 2014-05-30

Abstract

Disclosed is a fan motor. The fan motor comprises a base member which includes a combination part protruding to form a combination groove; a sleeve which is inserted into the combination groove and includes a shaft hole; a shaft which is inserted into the shaft hole of the sleeve and rotates; a fan member which is fixated at the upper end of the shaft and rotates in connection with the shaft; and a driving magnet which is fixated on the inner circumference of the fan member, wherein the driving magnet includes a protrusion part which protrudes from the upper side thereof. The protrusion part is pressed to be installed in an insertion groove on the fan member.

Description

Fan motor

The present invention relates to a fan motor.

Generally, the fan member of the fan motor and the drive magnet are coupled by insert molding. That is, the drive magnet is insert-molded when the thermoplastic resin pan is molded.

However, since the heat shrinkage rate of the fan member is larger than the heat shrinkage rate of the drive magnet, the shrinkage force of the fan member after molding acts in the direction of compressing the drive magnet. By this compression force, the fan member and the drive magnet are coupled.

However, when the fan member and the drive magnet are coupled only by the compressive force generated by the difference in the shrinkage ratio, there is a problem that the drive magnet disengages from the fan member during driving of the fan member.

In addition, when the drive magnet is insert-molded when the fan member is formed, the manufacturing process is complicated and the manufacturing cost is increased.

Further, when the drive magnet is insert-molded when the fan member is formed, there is a problem that the drive magnet is tilted and coupled to the fan member to reduce the perpendicularity, thereby deteriorating the rotational characteristics.

Japanese Patent Application Laid-Open No. 2001-244110

A fan motor capable of reducing separation of a drive magnet is provided.

A fan motor according to an embodiment of the present invention includes a base member having an engaging portion formed to protrude therefrom to form an engaging groove, a sleeve inserted in the engaging groove and having a shaft hole formed therein, a shaft inserted and disposed in the shaft hole of the sleeve, And a driving magnet fixedly mounted on an upper end of the shaft and rotated in association with the shaft, and a driving magnet fixedly mounted on an inner circumferential surface of the fan member, wherein the driving magnet has a projection protruding from an upper surface thereof, The projecting portion may be press-fitted into the insertion groove formed in the fan member.

The fan motor may further include a stator core fixed to the outer circumferential surface of the coupling portion and disposed to face the drive magnet.

The protrusions may be spaced apart from each other along the circumferential direction.

The drive magnet may be bonded to the inner circumferential surface of the fan member by an adhesive.

The insertion groove may be formed so as to be deeper than the axial length of the protrusion, so that the adhesive may be filled when the protrusion is press-fitted.

Since the projecting portion of the drive magnet is press-fitted into the insertion groove of the fan member, there is an effect that separation of the drive magnet from the fan member can be reduced.

1 is a schematic cross-sectional view illustrating a fan motor according to an embodiment of the present invention.
2 is an enlarged view showing part A of Fig.
3 is a perspective view illustrating a drive magnet included in a fan motor according to an embodiment of the present invention.
4 is a perspective view showing a modified embodiment of a drive magnet provided to a fan motor according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. The shape and size of elements in the drawings may be exaggerated for clarity.

FIG. 1 is a schematic sectional view showing a fan motor according to an embodiment of the present invention, FIG. 2 is an enlarged view showing part A of FIG. 1, FIG. 3 is a perspective view of a driving magnet Fig.

1 to 3, a fan motor 100 according to an embodiment of the present invention includes a base member 110, a sleeve 120, a shaft 130, a fan member 140, (150).

1, the axis direction means a direction from the lower end to the upper end of the shaft 130, or from the upper end to the lower end of the shaft 130, as viewed in FIG. And the radial direction refers to a direction from the shaft 130 toward the outer circumferential surface of the fan member 140 or from the outer circumferential surface of the fan member 140 toward the shaft 130 as viewed in Fig. do.

The circumferential direction means a direction of rotation along the outer circumferential surface of the shaft 130 or the fan member 140.

The base member 110 may have a circular plate shape, and a coupling portion 112 may be protruded to form a coupling groove 112a at a central portion thereof. The engaging portion 112 may have a cylindrical shape and a stepped groove 112b on which the washer 102 is seated may be formed on the bottom surface of the engaging groove 112a. That is, the washer 102 supporting the bottom surface of the shaft 130 at the time of stopping the shaft 130 may be installed in the stepped groove 112b.

A circuit board 104 for supplying power to a coil (not shown) wound around the stator core 160 may be installed at a lower end of the coupling part 112.

The sleeve 120 is inserted into the coupling groove 112a and the shaft hole 122 into which the shaft 130 is inserted may be formed. That is, the sleeve 120 may have a hollow cylindrical shape.

In addition, when the sleeve 120 is installed, the bottom surface of the sleeve 120 may be supported on the bottom surface of the coupling groove 112a.

Meanwhile, the sleeve 120 may be fixed to the engaging portion 112 and rotatably support the shaft 130. That is, the sleeve 120 may be attached to the inner circumferential surface of the coupling portion 112 by a method of bonding, press-fitting, or welding.

The shaft 130 is a rotating member that rotates in conjunction with the fan member 140 and is inserted into the shaft hole 1220 of the sleeve 120 and the upper end portion of the shaft 130 can be protruded from the upper portion of the sleeve 120. That is, The upper end of the shaft 130 is protruded from the upper portion of the sleeve 120 so that the fan member 140 can be engaged with the upper end of the shaft 130. The shaft 130 is rotatably supported by the sleeve 120 Can be supported.

The lower end of the shaft 130 may be inserted into the stepped groove 112b.

The fan member 140 may be fixed to the upper end of the shaft 130 and rotated in conjunction with the shaft 130.

Meanwhile, the fan member 140 may be provided with a recess 142 so that the stator core 160 can be inserted and disposed therein.

A hub 142a for coupling with the upper end of the shaft 130 may be formed in the recess 142. A circular hole may be formed in the hub 142a so that the shaft 130 may be inserted therein. The upper end of the shaft 130 may be inserted into the hole formed in the hub 142a.

Meanwhile, the concave portion 142 may be formed with an insertion groove 142b for installing the driving magnet 150. The drive magnet 150 may be bonded to the inner circumferential surface of the fan member 140 by an adhesive.

The insertion groove 142b will be described later in detail.

The driving magnet 150 is fixed to the inner circumferential surface of the fan member 140, that is, to the side wall of the concave portion 142. The driving magnet 150 may be fixed to the fan member 140 so as to be opposed to the stator core 160.

Meanwhile, the driving magnet 150 may have a ring-like shape and may be a permanent magnet that alternately magnetizes N and S poles along the circumferential direction to generate a magnetic force of a certain intensity.

When the power is supplied to the coil wound around the stator core 160, the electromagnetic interaction between the magnet 150 and the coiled stator core 160 A driving force for rotating the fan member 140 is generated.

The fan member 140 is rotated and the shaft 130 to which the fan member 140 is fixedly coupled rotates in conjunction with the fan member 140. [

Further, the driving magnet 150 may have a protrusion 152 protruding from the upper surface.

The insertion groove 142b may be formed in the concave portion 142 to correspond to the protrusion 152 and may have a shape corresponding to the protrusion 152. [ Further, the projecting portion 152 can be press-fitted into the insertion groove 142b. In other words, the projecting portion 152 can be engaged with the insertion groove 142b by interference fit.

The insertion groove 142b is formed to be deeper than the axial length of the protrusion 152 so that the adhesive can be filled in the protrusion 152 when the protrusion 152 is press-fitted. Accordingly, the separation of the magnet 150 can be further reduced.

In this manner, since the projecting portion 152 is press-fitted into the insertion groove 142b, the axial separation of the drive magnet 150 can be more effectively reduced.

4, the protrusions 252 may be formed so that a plurality of the protrusions 252 are spaced apart from each other along the circumferential direction of the protrusions 252. In this case, have. In this case, separation of the driving magnet 150 in the axial direction and slippage in the circumferential direction can be reduced.

Since the projecting portion 152 of the drive magnet 150 is press-fitted into the insertion groove 142b of the fan member 140 as described above, the axial separation of the drive magnet 150 can be reduced.

Since the depth of the insertion groove 142b in the axial direction is deeper than the axial length of the protrusion 152, the adhesive can be filled in the insertion groove 142b at the time of press fitting of the protrusion 152. [

Accordingly, the coupling force between the driving magnet 150 and the fan member 140 can be further increased.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be obvious to those of ordinary skill in the art.

100: Fan motor
110: Base member
120: Sleeve
130: shaft
140: Fan member
150: Driving magnet

Claims

A base member protrudingly formed with an engaging portion forming an engaging groove;
A sleeve inserted into the coupling groove and having a shaft hole formed therein;
A shaft inserted into the shaft hole of the sleeve and rotated;
A fan member fixedly mounted on an upper end of the shaft and rotated in association with the shaft; And
A drive magnet fixedly installed on an inner circumferential surface of the fan member;
/ RTI >
Wherein the drive magnet has a projection protruding from an upper surface thereof,
And the protruding portion is press-fitted into the insertion groove formed in the fan member.

The method according to claim 1,
And a stator core fixedly mounted on an outer circumferential surface of the engaging portion and disposed opposite to the drive magnet.

The method according to claim 1,
And the protrusions are spaced apart from each other along the circumferential direction.

The method according to claim 1,
And the drive magnet is bonded to the inner circumferential surface of the fan member by an adhesive.

The method according to claim 1,
Wherein the insertion groove is formed to be deeper than an axial length of the protrusion, so that the adhesive is filled when the protrusion is press-fitted.