KR100904429B1 - Fan Motor - Google Patents

Abstract

The present invention relates to a motor, in particular a fan motor.

According to the present invention, there is provided a bearing therein, and a bearing housing in which a stepped portion is formed radially inward; And it is provided between the bearing housing and the bearing can provide a fan motor comprising a bearing holder for limiting the position of the bearing.

Motor, Fan, Turbo Fan, Fan Motor

Description

Fan Motor

1 is a perspective view showing a general fan motor;

2 is an exploded perspective view of a motor according to the present invention;

3 is a combined perspective view of a motor according to the present invention;

4 is a perspective view showing a coupling direction of the fan and the rotor according to the present invention;

5 is a bottom view of a fan according to the present invention;

6 is a sectional view of a motor according to the present invention;

7 is a perspective view of an insulator coupled with a stator core of a motor according to the present invention;

8 is an exploded perspective view of the stator assembly 70 and the bearing members 50, 60 of the motor according to the invention;

9 is an exploded perspective view of a bearing member of a motor according to the present invention;

FIG. 10 is an enlarged cross-sectional view of a portion A of FIG. 6.

** Description of the main parts of the drawing **

10: fan 20: rotor

30: rotor assembly 40: rotation axis

50, 60: bearing member (upper bearing housing, lower bearing housing)

67: lower bracket 70: stator assembly

71: stator core 72: insulator

73: PCB 74: mold part

100: motor (fan motor)

The present invention relates to a fan motor, and more particularly, to a motor that is easy to manufacture and promotes efficiency and durability. In addition, the present invention relates to a fan motor that is compactly constructed and easy to handle and use, and in particular, reduces the overall height to reduce installation space in household appliances and the like and maximizes space utilization.

Here, the fan motor does not mean a fan driving motor, but means an assembly of a fan and a motor.

In general, a motor refers to an apparatus for transmitting a rotational force to the outside by rotating the rotor by electromagnetic interaction between the stator and the rotor. Here, the rotational force of the rotor drives the load through the rotating shaft.

On the other hand, the stator generally includes a stator core and a coil wound around the stator core. Here, the stator core is electrically insulated from the coil through an insulator or bobbin.

However, in a general motor, the stator and the rotor are accommodated in a bracket forming a motor appearance, and a fan or the like is connected to a rotating shaft exposed to the outside of the bracket. Therefore, this type of motor and fan has been forced to increase the height of the overall fan motor due to the height of the motor bracket and the fan height.

That is, as shown in Figure 1, in the conventional fan motor (1), although not shown inside the bracket (2) forming the appearance of the motor, a stator, a rotor, a coil, a PCB for control is provided as necessary, The rotating shaft 3 connected to the rotor is exposed outside the bracket 2. In addition, the fan 4 is connected to the end of the exposed rotating shaft 3 to form an overall fan motor 1.

In such a fan motor, the length of the fan motor 1, that is, the length from the front of the fan 4 to the rear of the bracket 2 (hereinafter, such a length is referred to as "the height L of the fan motor") The height of the fan, the length from the rear of the fan 4 to the front of the bracket 2, and the height of the bracket 2 were inevitably high.

Therefore, sufficient space for installation of this fan motor 1 had to be secured. And there was a problem that it is difficult to utilize the space, such as home appliances are installed such a fan motor. In addition, since the height of the fan motor 1 is high, the process of installing the product has a complicated or difficult problem.

The present invention aims to solve all the problems in the above-described fan motor.

More specifically, an object of the present invention is to provide a motor, particularly a fan motor, which is easy to manufacture and assemble, thus increasing productivity.

In addition, an object of the present invention is to provide a compact fan motor by effectively reducing the height of the fan motor.

In order to achieve the above object, the present invention is a bearing housing provided with a bearing and a stepped portion is formed radially inward; And a bearing holder disposed between the bearing housing and the bearing to limit the position of the bearing.

The bearing housing then urges the radially outer portion of the bearing holder.

Preferably, the bearing further comprises a felt provided radially outward of the bearing and containing bearing oil, wherein the bearing holder has radially slit for circulating the bearing oil contained in the felt to the upper portion of the bearing. Is formed.

Preferably, the bearing housing is provided with radially grooves for bearing oil contained in the felt for circulating the bearing downward.

In addition, a rotator assembly accommodated inside the fan; And a rotor assembly including the fan and rotating outside the stator assembly.

On the other hand, the fan motor of the present invention, the stator assembly comprising a stator core, an insulator, a bearing housing in which a step is formed radially inward, and a coil; A bearing member coupled to a central portion of the bearing housing; A bearing holder disposed between the bearing housing and the bearing to limit the position of the bearing; A fan accommodating the stator assembly therein, a rotating shaft coupled to rotate integrally with the fan and rotatably supported through the bearing member, and a rotor integrally rotating with the fan at a radially outer side of the stator assembly; It is made to include.

Hereinafter, a fan motor according to the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration of a motor, particularly a fan motor, according to the present invention will be described in detail with reference to FIGS. 2 to 6.

2 is an exploded perspective view of the motor according to the present invention, Figure 3 is a combined perspective view of the motor according to the present invention. 4 is a perspective view illustrating a coupling direction of a fan and a rotor according to the present invention, FIG. 5 is a bottom view of the fan according to the present invention, and FIG. 6 is a cross-sectional view of the motor according to the present invention.

Since the motor according to the present invention is integrally formed with a fan, the motor according to the present invention is hereinafter referred to as a fan motor for convenience.

As shown in FIG. 2, the motor according to the present invention may include a rotor assembly 30, a stator assembly 70, and bearing members 50 and 60.

First, the rotor assembly 30 will be described.

The rotor assembly comprises a fan 10 and a rotor 20. The fan 10 forms an upper appearance of the fan motor 100 and accommodates the stator assembly 70 described later. In addition, the rotor 20 is located in the radially outer side of the stator assembly 70 to rotate by mutual electromagnetic action with the stator assembly 70.

The fan 10 includes the body portion 11 accommodating the stator assembly 70 therein and having a vertical cross-sectional shape thereof in a longitudinal shape. In addition, the fan 10 is formed radially outward of the body portion 11, and comprises a wing portion 13 which causes the flow of air as it is rotated.

Since the fan 10 accommodates substantially all the components of the stator assembly 70 therein, after the assembly of the fan motor 100 is completed, as shown in FIG. The motor 100 may be formed. As shown in FIG. 3, the fan motor 100 according to the present invention is substantially formed by the fan 100 and the lower bracket 65. Here, reference numeral 81 denotes a coupling hole for attaching the fan motor 100 to the product or the motor mount, and reference numeral 82 denotes a slot for connecting the PC or coil of the fan motor with an external power line or control line. Although the external power line is not shown through the slot, it may be electrically connected to the above-described PC or coil through the connector.

The fan motor 100 according to the present invention is characterized in that the rotor 20 is rotated integrally with the fan 10. To this end, the hub portion 12 to which the rotor is coupled may be formed inside the body portion 11. That is, the rotor 20 may be coupled to the inner side of the hub portion 12. Here, the rotor may be pressed into the hub portion 12 may be coupled, may be coupled through an adhesive.

On the other hand, the rotor 20 may be made to include a permanent magnet. That is, it is formed of a cylindrical permanent magnet, it can be configured to rotate in the radially outer side of the stator assembly 70. At this time, the permanent magnet should be magnetized so that the magnetic poles are alternated along the circumferential direction.

As shown in FIGS. 4 and 5, the fan 10, in particular the radially inner side of the hub portion 12, has a positioning portion 14 for determining the engagement position when the rotor 20 is engaged. Is formed. The positioning unit 14 performs a stopper function so that the rotor is no longer inserted when the rotor is inserted and coupled. The positioning unit may be formed in plural along the circumferential direction of the hub unit, and may include bosses protruding a predetermined length in the radial direction of the hub unit 12.

As described above, the positioning unit 14 determines the position of the rotor 20, which is made of a rotor, in particular a permanent magnet. Such a rotor is preferably provided in the correct position. Because the rotor 20 should be positioned to face each other with the stator assembly 70 and the air gap, when the position of the rotor 20 is positioned to have a certain error toward the upper side or the lower side, the efficiency of the motor is remarkably increased. It is lowered, and the vibration becomes larger during rotation. Therefore, determining the position of the rotor 20 through the positioning unit 14 is particularly effective in the outer rotor type motor (motor in which the rotor rotates in the radially outer side of the stator) as in the present invention. .

Hereinafter, the fan 10 will be described in detail with reference to FIGS. 4 to 6.

As described above, the fan 10 in the present invention includes a body portion 11 and a wing portion 13.

The trunk portion 11 includes a boss portion 15 having a vertical cross section of a vertical shape and a base portion 16 integrally connected with a radial end portion of the boss portion. Here, the base portion substantially forms the bottom surface of the fan 10.

The wing portion 13 includes a plurality of wings 17 for generating a flow of air as it is rotated and a shroud 18 for guiding the flow of air. Wherein the blade 17 is formed to be connected to the shroud 18 and the base portion 16.

This fan 10 is called a turbo fan for convenience, and a shroud that guides the flow of air is integrally formed with the fan 10. Here, since the wing 17 is connected to and fixed to the shroud 18 and the base portion 16, vibration and vibration are minimized, thereby reducing fan noise.

On the other hand, such a fan 10 is preferably formed by a single injection. For this purpose, it is preferable that the maximum outer diameter of the base portion 16 is smaller than the maximum inner diameter of the shroud 18. That is, as shown in FIG. 5, it is preferable that at least a predetermined gap d is formed between the shroud 18 and the base portion 16. Here, the gap d will have a value greater than at least zero.

Through this, since the lower mold mold and the upper mold mold can be separated by a boundary between the vertical plane according to the inner diameter of the shroud 18 or the vertical plane according to the outer diameter of the base 16, the fan 10 is separated by a single injection process. It can be formed.

In addition, the vanes 17 are preferably formed in an airfoil as shown in FIG. 5 to minimize air resistance and reduce fan noise. In addition, the connection portion of the wing 17 and the base portion 16 is preferably formed in a round shape (R). This is for minimizing defects due to noise generated due to the acute angle between the wing and the base portion 16 and residual stress during injection. That is, due to the round shape of the blade 17, in particular, the effect of improving the resonance noise can be obtained.

On the other hand, as shown in Figure 6, it is preferable that the cross-sectional shape of the trunk portion, particularly the boss portion 15 of the fan 10 is a longitudinal shape. That is, it is preferable that the radius is formed to be wider toward the lower side. This is to substantially accommodate the stator assembly 70 therein and to minimize the air flow resistance outside the boss portion 15. That is, when the air flows into the space between the shroud 18 and the boss portion 15, the air flow resistance can be minimized. That is, the air is guided by the shape of the shroud 18 and the boss portion 15, and it is possible to minimize the flow resistance.

In addition, the central portion of the boss portion 15 may be formed in substantially the same line as the upper portion of the shroud (18). In addition, as shown in FIG. 6, the central portion of the boss portion 15 may protrude a predetermined length from the upper portion of the shroud 18. This is to reduce the height of the fan in the fan motor 100 to reduce the height of the overall fan motor (100).

For example, the fan motor 100 shown in FIG. 6 may be installed to introduce air from the storage compartment of the refrigerator. In this case, the upper portion of the fan motor 100 is installed to communicate with the storage compartment of the refrigerator. Therefore, if the stator assembly 70 has the same size and the boss portion 15 has the same size, when the boss portion protrudes from the upper portion of the shroud 18, the upper portion of the shroud and the lower portion of the stator assembly 70 are different. The distance must be reduced. Since the installation space of the fan motor 100 varies depending on the distance between the shroud upper portion and the stator assembly 70, the installation space can be greatly reduced. Therefore, it is possible to provide a fan motor 100 which is more compact and easier to install due to the protruding shape of the boss portion 15. In addition, in terms of products, various flow path designs will be possible.

Hereinafter, the stator assembly 70 and the bearing members 50 and 60 will be described in detail with reference to FIGS. 6 to 9. 7 is a perspective view in which the stator core 71 and the insulator 72 are coupled, FIG. 8 is an exploded perspective view of the stator assembly 70 and the bearing members 50 and 60, and FIG. 9 is a perspective view of the bearing member 50. Exploded perspective view.

First, the stator assembly 70 will be described.

The stator assembly 70 includes a stator core 71 and an insulator 72. Here, the insulator 72 is formed of an insulating material and may be coupled to the upper and lower portions of the stator core 71. Of course, the stator core 71 may be inserted and injected to be integrally formed with the stator core.

The coil 76 is wound around the stator core 71 through the insulator, and thus insulation between the stator core 71 and the coil 76 is achieved. In addition, a position at which the coil 76 is wound through the insulator 72 is determined.

On the other hand, the fan motor 100 according to the present invention may include a PC 73 to control the driving of the motor. In the PC, various electric and electronic devices may be mounted, and a power IC may be mounted. Electrical patterns are also formed in the PC. In this case, the stator core 71 and the insulator 72 may be located above the PCB. In more detail, the insulator 72 is coupled to the upper portion of the PCB 73, and the insulation between the stator core 71 and the PC 73 is made through the insulator 72.

The insulator 72 includes a coupling portion 75 for coupling with the PC 73. For example, the coupling portion 75 may be formed in a hook shape as shown in FIG. In this case, although not shown, the hook groove will be formed in the PC 73 corresponding to the hook. In addition, the hook groove may be formed in the center of the PC 73 without being formed separately, and may be a through hole through which the rotation shaft 40 passes. In this case, as shown in FIG. 7, the hook may be elastically deformed radially inward and then coupled to the PC 73.

In addition, although not shown, the hook may be replaced with a simple rod-shaped protrusion. In this case, it will be preferable that holes or grooves (not shown) in which the protrusions can be inserted are formed in the PC 73. The number of such hooks or protrusions may be appropriately selected and may consist of two to three.

On the other hand, the lower portion of the insulator 72 is preferably formed in contact with the PC 73 so that the insulator 72 can be more stably coupled to the PC 73.

However, the lower portion of the insulator 72 is preferably formed to have a constant stepped structure. That is, it is preferable that a stepped structure is formed so that a predetermined portion of the lower portion of the insulator 72 has a clearance distance h that does not contact the upper surface of the PCB 73.

This is to allow the coil 76 wound on the stator core 71 to secure a clearance for electrical connection with the PC 73. For example, to prevent the insulator 72 from being damaged by heat when the coil 76 is soldered to the PC 73. Of course, this clearance h will also serve to prevent damage to the soldered portion due to coupling of the insulator even after soldering has been made first.

On the other hand, such a stepped structure is useful even if it is configured to control the driving of the motor outside of the fan motor, that is to say the product itself without a PC. In this case, the ends of the above-described coil 76 should be directly connected to an external lead wire, etc., because this clearance distance h can be used.

On the other hand, when the coil consists of three phases, it is preferable that the stepped portions are formed at four positions as shown in FIG. .

In addition, after the stator core 71, the insulator 72, the coil 76, and the PC 73 are all formed, they are preferably wrapped by the mold part 74.

Since the fan motor according to the present invention may not be in a sealed form, it is very preferable to prevent the leakage or leakage of the stator assembly 70, which may be electrically shorted, by the mold portion 74 of insulating material. . A stator assembly 70 in which such a mold portion 74 is formed is shown in FIG. 8. In addition, the mold portion 74 may be formed of various materials and various shapes, for example, may be formed of macromelt or BMC (Bulk Molding Compound, reinforced thermosetting resin).

Meanwhile, the mold unit 74 may include a chamfer 74a, a protrusion 74b, and a recess 74c to prevent leakage and reduce noise in relation to the fan 10.

First, when the fan 10 rotates with respect to the stator assembly 70, a portion in which the inside of the boss part 15 of the fan 10 and the mold part 74 face each other is formed. If the interval of this portion is narrowed, there is a possibility that noise is generated when the fan 10 is rotated, the rotation of the fan 10 may interfere. Therefore, such a portion is preferably formed to have a sufficient gap through the chamfer (74a) as shown in FIG. Of course, this chamfer may be formed in a chamfer or round.

In addition, in order to prevent water from penetrating into the stator assembly 70, the protrusion 74b and the recess 74c may be formed in the mold 74. The protrusion is formed on the radially outer side of the hub portion 12 of the fan 10, the depression 74c is preferably formed to face the lower end of the hub portion 12.

For example, the fan motor 100 may be installed with the rotation shaft 40 perpendicular to the horizontal line. In this case, even if water accumulates in the lower portion of the fan motor 100, water is effectively prevented from entering the stator assembly 70 due to the water filled by the protrusion 74b. In addition, the fan motor 100 may be installed with the rotation shaft 40 horizontally with respect to the horizontal line. In this case, the falling water may flow between the inside of the boss part 15 of the fan 10 and the mold part 74. However, such water does not flow into the stator assembly 70 due to the protrusion 74b, but flows out of the hub part 12, but the hub part 12 rotates so that it is scattered and discharged to the outside of the fan 10. Therefore, more effectively, the protrusion 74b is preferably formed in a line or higher than the lower end of the hub portion 12. In addition, the depression depth of the depression 74c is preferably formed to a sufficient length so that the hub portion 12 does not interfere with the mold portion 74 when rotating.

On the other hand, the structure of the chamfer 74a is also effective for preventing leakage when the rotating shaft 40 is installed perpendicular to the horizontal line. That is, the water dropped into the fan motor 100 through the mold 74 is introduced to the outside of the hub 12 due to the inclination of the chamfer 74a.

The motor, in particular the fan motor 100, according to the invention comprises a bearing member as described above. Such a bearing member may include an upper bearing housing 50 and a lower bearing housing 60 positioned respectively above and below the stator assembly 70.

As illustrated in FIG. 8, the upper bearing housing 50 and the lower bearing housing 60 are coupled to the upper and lower portions of the stator assembly 70, respectively. This coupling may be achieved by the bearing housings 50 and 60 being pressed into the central portion of the stator assembly 70.

Therefore, the rotating shaft 40 is rotatably supported through the center portions of the stator assembly 70 and the bearing housings 50 and 60. In addition, the air gap between the stator assembly 70 and the rotor assembly 30 will be maintained through the bearing housing.

On the other hand, the bearing housings may be coupled after the mold portion 74 is formed in the stator assembly 70, the mold housing 74 may be formed after the bearing housing is first coupled to the stator assembly 70.

Here, it is preferable that the upper bearing housing 50 and the lower bearing housing 60 have substantially the same shape and function. However, it is preferable that the lower bearing housing 60 further includes a lower bracket 66 in order to be mounted on the product under the fan motor 100. In this case, the lower bracket may be formed separately, or may be formed in the same manner as the cover part housing 51 of the upper bearing housing 50 to be described later, but the shape may be different. In the latter case, the upper bearing housing 50 and the lower bearing housing 60 have the same shape and detailed configuration, but only the shape of the cover housing 51 and the lower bracket 66 will be different. Therefore, the detailed description of the lower bearing housing 60 is omitted because it overlaps with the description of the upper bearing housing 50.

As shown in FIG. 9, the upper bearing housing 50 is inserted into the stator assembly 70, and the upper bearing housing 50 is opened and the lower opening is coupled to the core housing 55. It includes a cover unit housing 51 to form a predetermined space therein.

In addition, a bearing 54 is provided inside the upper bearing housing 50. In this case, the bearing 54 is preferably a sintered bearing, more specifically, an oil-less bearing. On the other hand, it is preferable that a felt 53 containing bearing oil is provided inside the bearing housing 50 as a configuration for supplying bearing oil for a smooth function of the bearing. That is, a bearing is provided in the radially inner side of the felt 53, and bearing oil is supplied to the bearing 54 through the felt.

Meanwhile, in order to position or limit the position of the bearing 54, a bearing holder 52 is preferably interposed between the cover part housing 51 and the bearing 54. In addition, the bearing holder preferably has a slit 56 radially formed to circulate the bearing oil contained in the felt 53 to the upper portion of the bearing 54. Likewise, in the core housing 55, a groove for circulating the bearing oil contained in the felt 53 to the lower portion of the bearing 54 is preferably formed radially.

Hereinafter, with reference to Figure 10 in the fan motor according to the present invention, the coupling portion of the rotating shaft 40 and the bearing members 50, 60, in particular the upper bearing housing 50 will be described in detail.

First, the rotating shaft 40 may be coupled to the fan 10 by various methods. However, in any case, it is preferable that a rotation shaft accommodating part 19 is formed at a coupling portion of the fan 10 and the rotation shaft 40 to extend a predetermined length in the longitudinal direction of the rotation shaft 40.

On the other hand, the bearing 54 in the present invention is minimized through the bearing oil contained in the felt 56 in advance. Here, it is preferable that the bearing oil is not scattered on the rotating shaft 40. In order to prevent the scattering of the bearing oil, the rotary shaft 40 is provided with an oil cutter 58. In this case, the oil cutter 58 is preferably located in a part of the through hole 50a of the cover part housing 51. At this time, the through hole 50a is for the penetration of the rotation shaft 40.

Therefore, since the oil cutter 58 substantially blocks the through hole 50a, the oil cutter 58 prevents the bearing oil from scattering on the rotation shaft 40.

In addition, the outer diameter of the rotating shaft receiving portion 19 may be formed to be smaller than the inner diameter of the through hole 50a to prevent the scattering of the bearing oil. Of course, in this case, the configuration of the oil cutter 58 may be omitted, and both may simultaneously perform a bearing oil scattering prevention function.

That is, the rotation shaft receiving portion 19 may be formed to support the rotation shaft 40 and substantially block the through hole 50a. Therefore, through the rotation shaft receiving portion 19 it is possible to more firmly coupled the fan 10 and the rotation shaft 40 and to prevent the splashing of bearing oil.

On the other hand, as shown in Figure 10, the cover portion housing 51 is preferably formed with a stepped portion (59). That is, it is preferable that the stepped portion 59 is formed radially inward. Through the stepped part 59, the cover part housing 51 presses only the radially outer part of the bearing holder 52, and the slit 53 and the inner part of the bearing holder 52 do not press. Thus, the bearing holder 52 is able to align the bearing due to this step portion 59, while being able to adjust the fluidity appropriately.

In other words, the bearing holder 52 is elastically deformed due to the stepped portion 59 so that the inner portion thereof may be moved upward by a maximum H distance. Therefore, the bearing 54 has an appropriate fluidity due to the shape of the stepped portion 59 and the bearing holder 52.

The fluidity of the bearing 54 through the fluidity of the stepped portion 59 and the bearing holder 52 is very important. This is because when the fluidity of the bearing 54 is not secured, difficulty may occur when the bearing 54 and the rotation shaft 40 are fastened. That is, when the alignment is properly aligned, the rotation shaft 40 may be easily fastened, but otherwise, the fastening may be very difficult when the bearing does not have fluidity. In addition, when forcibly tightened, a lot of noise is generated by generating scratches on the rotating shaft.

However, as described above, if the proper fluidity is ensured in the bearing 54, the coupling between the bearing and the rotating shaft becomes very easy, and when the rotating shaft is rotated, proper careful torque is maintained to smoothly rotate the rotating shaft 40 and generate noise. It can be prevented beforehand.

Hereinafter, with reference to Figure 2 will be described in detail the assembly of the motor, in particular the fan motor according to the present invention.

The assembly sequence of the stator assembly is as follows.

The stator core 71 is formed through punching and lamination, and an insulator 72 is formed in the stator core. And winding the coil. In addition, after mounting various circuit elements on the PCB, the insulator and the PCB are combined to form the stator assembly 70. In this case, electrical connection between the coil and the PCB 73 is made. In addition, the mold unit 74 is formed to surround the outside of the stator assembly 70. This completes the assembly of the stator assembly.

The assembly order of the bearing members 50 and 60 is as follows.

The felt 53 is put into the core bearing housing 55, and bearing oil is injected. Then, the bearing 54 is placed in the center of the felt, and the bearing holder 52 is placed on the bearing upper portion. The cover bearing housing 51 is coupled to the core bearing housing 55. This completes the assembly of the upper bearing housing 50. In the same order, the lower bearing housing 60 is assembled.

The assembly order of the rotor assembly 30 is as follows.

First, the fan 10 is formed through an injection process. The permanent magnet rotor 20 is coupled to the fan 10, and the permanent magnet is magnetized. And the rotary shaft 40 is coupled to the fan 10 through a suitable method. This completes the assembly of the rotor assembly 30.

When the stator assembly 70, the bearing members 50 and 60 and the rotor assembly 30 are formed, they are coupled to each other.

First, the upper bearing housing 50 and the lower bearing housing 60 are coupled to the upper and lower portions of the stator assembly 70 by a forced press method. Then, the rotary shaft 40 passes through the upper bearing housing 50, the stator assembly 70, and the lower bearing housing 60. Then, the rotation shaft 40 is coupled to the rotation shaft departure prevention ring (ring) 67 to the portion exposed to the outside of the lower bracket (67). The release preventing ring 67 serves to prevent the rotor assembly 30 from being separated from the stator assembly 70.

Through this assembly process, the assembly of the motor according to the present invention is completed, thereby forming the motor shown in FIG. 3. That is, the stator assembly 70 configuration and the upper bearing housing 50 configuration are both accommodated inside the fan 10 to form a fan motor that can significantly reduce the overall height.

According to the above-described present invention, the following effects can be obtained.

First, the present invention is easy to manufacture, it is possible to form a compact fan motor. In particular, it is possible to significantly reduce the height of the fan motor to significantly reduce the installation space.

Second, according to the present invention, because the stator assembly is wrapped in a mold part of an insulating material, a safer and easier to use fan motor can be provided. In addition, it is possible to provide a fan motor that can prevent the penetration of water through the stepped structure of the mold part.

Third, since the bracket configuration forming the overall appearance of the motor can be deleted, a fan motor capable of saving material and eliminating the process for forming the bracket can be provided.

Fourth, it is possible to provide a motor, in particular a fan motor, in which a bearing member for rotatably supporting a rotating shaft is directly attached to the stator assembly. Therefore, there is an effect that it is easy to manufacture and can omit a separate configuration for fixing the bearing member.

Fifth, since it is possible to provide a fan motor to which a turbo fan structure having an integrated shroud for guiding the flow of air can be provided, it is possible to provide a fan motor with a simple configuration and very efficient.

Claims (8)

A bearing housing having a bearing formed therein and having a stepped portion radially inward; And A bearing holder interposed between the bearing housing and a bearing to limit the position of the bearing; And It is provided on the radially outer side of the bearing and includes a felt containing bearing oil, And a slit radially formed in the bearing holder to circulate the bearing oil contained in the felt to an upper portion of the bearing. The method of claim 1, And the bearing housing presses a radially outer portion of the bearing holder. delete delete The method of claim 1, The bearing housing is a fan motor, characterized in that the groove for circulating the bearing to the bearing oil contained in the felt radially formed. The method of claim 1, A stator assembly accommodated in the fan; And And a rotor assembly including the fan and rotating outside the stator assembly. A stator assembly comprising a stator core, an insulator, a bearing housing having a stepped portion radially inward, and a coil; A bearing member coupled to a central portion of the bearing housing; A bearing holder disposed between the bearing housing and the bearing to limit the position of the bearing; A fan accommodating the stator assembly therein, a rotating shaft coupled to rotate integrally with the fan and rotatably supported through the bearing member, and a rotor integrally rotating with the fan at a radially outer side of the stator assembly; Has a rotor assembly, It is provided on the radially outer side of the bearing further comprises a felt containing bearing oil, And a slit radially formed in the bearing holder to circulate the bearing oil contained in the felt to an upper portion of the bearing. The method of claim 7, wherein The bearing housing presses a radially outer portion of the bearing holder.

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