KR20190112692A - Housing assembly of fan motor - Google Patents

Abstract

The present invention relates to a housing assembly of a fan motor. According to an embodiment of the present invention, the housing assembly of a fan motor comprises: a motor housing embedded in an outer housing forming an exterior of a fan motor and having a vane forming a flow path between the outer housing and the motor housing and guiding flow through a circumference; and a bearing housing inserted and coupled to an opened side of the motor housing and providing a mounting space of the bearing supporting a rotation shaft of the motor. The motor housing and the bearing housing can be coupled to have at least two contact surfaces existing at different positions to ensure concentricity. According to the present invention, and the concentricity can be secured while reducing flow resistance in the high speed fan motor and an assembly state between the housings can be prevented from being released due to disturbance such as vibration, thereby improving performance and reliability of the fan motor.

Description

Housing assembly of fan motor {HOUSING ASSEMBLY OF FAN MOTOR}

The present invention relates to a housing assembly of a fan motor.

In the case of a high speed fan motor used in a hair dryer or a cleaner, a flow path is formed between the motor housing and the outer housing, and the flow resistance may increase due to the fastening structure when the bearing housing of the structure separated through both ends is fastened.

Conventional high speed fan motors have been fabricated such that the motor housing, vanes, and outer housing have an integral structure, such as by aluminum injection molding. In this case, two bearings are located on one side of the stator, and the stator core is composed of 'c'-shaped yokes rather than circular, and thus a connection structure can be added to the motor housing. And since the two bearings are located on one side and the stator core is connected in series to the bearing housing, there may not be a structure that prevents flow on the flow path between the motor housing and the outer housing.

However, when one bearing is positioned at both ends of the stator, the motor housing and the bearing housing are separated and manufactured through assembly. And even in this case, there should be no structure to prevent flow on the flow path.

1 is a view schematically showing a housing structure of a conventional fan motor, and FIG. 2 is a view schematically showing a combined state of a motor housing and a bearing housing in a conventional fan motor, and FIG. 3 is a simplified view of a conventional bearing housing. The figure is shown.

The conventional fan motor 1 has a housing structure including an outer housing 3, a motor housing 10, and a bearing housing 30 as shown.

The outer housing 3 forms the sheath of the fan motor 1, and has a cylindrical shape with an empty inside as shown in the figure.

The motor housing 10 is disposed inside the outer housing 3 at intervals for forming the flow path. And the motor housing 10 was provided with the vane 20 through the outer diameter. Although not shown separately, the motor housing 10 has a structure in which a stator, a rotor, etc. are internally coupled, and a rotation shaft 50 is disposed through the center thereof.

The bearing housing 30 is a member that supports the rotating shaft 50 and includes a bearing for reducing friction when the rotating shaft 50 rotates, and an assembly structure 11 (FIG. 2) provided at one side of the motor housing 10. It had a structure that is fastened with. To this end, the bearing housing 30 was also provided with a plurality of assembly structures 31, the protruding shape of the assembly structure 31 appeared to be a problem of preventing flow to increase the flow resistance.

On the other hand, in the case of a high speed fan motor, the concentricity of the bearing is very important, and it is sensitive to deformation, and when the prefabricated bearing housing 30 is applied to the high speed fan motor, the assembly is released by the vibration of the high speed fan motor. There was a downside.

As a prior document related to the present invention, Korean Patent Laid-Open Publication No. 10-2009-0026919 (2009.03.16. Publication date) (hereinafter referred to as 'prior document 1') discloses a fan motor of a vacuum cleaner. In the case of the fan motor disclosed herein, only the configuration for reducing the noise generated in the flow of the fluid while maintaining the suction efficiency and the heat dissipation performance is disclosed, and it is difficult to increase the air volume through the flow improvement of the high speed fan motor. In addition, there are no technical measures to solve the problem of maintaining the concentricity of the high speed fan motor and removing the assembly due to the motor vibration.

In addition, as a prior document related to the present invention, Korean Patent Publication No. 10-2008-0018744 (2008.02.28. Publication Date) (hereinafter referred to as 'prior document 2') discloses a vacuum cleaner motor assembly. The motor assembly disclosed herein has a bearing housing which can obtain an optimal flow path area and obtain a high suction force even in a miniaturized fan motor. However, there is no suggestion regarding a configuration for maintaining the concentricity of the high speed fan motor and a solution for preventing the assembly from loosening due to the motor vibration.

 In addition, as a prior document related to the present invention, Korean Patent Publication No. 10-2012-0130611 (2012.12.03. Publication Date) (hereinafter referred to as 'prior document 3') discloses a vacuum cleaner fan motor assembly. . The fan motor assembly disclosed herein has an advantage of improving efficiency while being easy to design, but it does not mention the method for maintaining the concentricity of the fan motor or the contents of the assembled state between the housings due to the vibration at high speed.

Therefore, a structure that obstructs flow in the high speed fan motor may be eliminated, thereby reducing the flow path resistance, and there is a need for a method for solving the problem of maintaining the concentricity between the motor housing and the bearing housing and releasing the assembly due to vibration during high speed rotation. .

An object of the present invention is to provide a housing assembly of a fan motor which can reduce flow path resistance of a high speed fan motor and can maintain concentricity between the motor housing and the bearing housing.

An object of the present invention is to provide a housing assembly of a fan motor that can prevent the bearing housing assembly from being released by disturbance such as vibration during operation of the high speed fan motor.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention, which are not mentioned above, can be understood by the following description, and more clearly by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

According to an aspect of the present invention for achieving the above object, in the structure used when assembling between the motor housing and the bearing housing to eliminate the structure that can increase the flow resistance by preventing the flow, it is possible to maintain concentricity between the housing A housing assembly of a fan motor can be provided.

The housing assembly of the fan motor according to an embodiment of the present invention for this purpose is embedded in an outer housing forming an exterior of the fan motor, and has a vane for forming a flow path between the outer housing and guiding flow through the circumference. And a bearing housing inserted into and coupled to an open side of the motor housing, the bearing housing providing a seating space of the bearing supporting the rotational axis of the motor, wherein the motor housing and the bearing housing are at least present at different positions. The concentricity can be secured by fastening to have two contact surfaces.

According to another aspect of the present invention for achieving the above another object is a fan that can be released from the assembly state between the motor housing and the bearing housing by the disturbance such as vibration during operation of the high speed fan motor to prevent the bearing housing from being separated A housing assembly of the motor can be provided.

A housing assembly of a fan motor according to another embodiment of the present invention for this purpose is embedded in an outer housing forming an exterior of the fan motor, and has a vane for forming a flow path between the outer housing and guiding flow through the circumference. And a bearing housing inserted and fastened to an open side of the motor housing, the bearing housing providing a seating space of the bearing supporting the rotational axis of the motor, wherein the motor housing includes a first anti-loosening protrusion, And a second anti-loosening protrusion engaged with the anti-loosening protrusion, and the first and second anti-loosening protrusions prevent the motor housing and the bearing housing from rotating in a direction opposite to the fastening after being fastened together. This can be prevented from being released. That is, the assembly between the housings can be prevented from being released by disturbances such as vibrations that appear during the operation of the high speed fan motor.

According to the present invention, the flow path resistance can be reduced by eliminating the structure that obstructs flow in the high speed fan motor, and the concentricity between the motor housing and the bearing housing can be maintained, thereby improving the performance of the high speed fan motor. .

In addition, according to the present invention, assembling between the motor housing and the bearing housing is released due to disturbance such as vibration during operation of the high speed fan motor, thereby preventing the bearing housing from being separated.

In addition to the effects described above, the specific effects of the present invention will be described together with the following description of specifics for carrying out the invention.

1 is a view schematically showing a housing structure of a conventional fan motor.
2 is a perspective view briefly illustrating a combined state of a motor housing and a bearing housing constituting a housing of a conventional fan motor.
3 is a front view briefly showing a bearing housing constituting a conventional fan motor.
4 is a perspective view briefly illustrating a housing assembly of a fan motor according to an embodiment of the present invention.
5 is a partial cutaway perspective view briefly illustrating a motor housing and a bearing housing constituting a housing assembly of a fan motor according to an embodiment of the present invention.
6 is a view showing a cross-sectional structure after coupling of the motor housing and the bearing housing constituting the housing assembly of the fan motor according to an embodiment of the present invention.
FIG. 7 is a view illustrating a separated cross-sectional structure of a motor housing and a bearing housing constituting a housing assembly of a fan motor according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals designate like elements throughout the specification. In addition, some embodiments of the invention will be described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are shown in different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In describing a component of the present invention, when a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to that other component. It is to be understood that other components may be "interposed" between each component, or that each component may be "connected", "coupled" or "connected" through other components.

4 is a perspective view briefly illustrating a housing assembly of a fan motor according to an embodiment of the present invention.

Referring to FIG. 4, the housing assembly of the fan motor 100 according to the embodiment of the present invention includes a motor housing 110 and a bearing housing 130.

The motor housing 110 is embedded in an outer housing forming an exterior of the fan motor 100.

Although not illustrated separately, the outer housing may be configured to have the same or similar form as the outer housing 3 (see FIG. 1) of the conventional fan motor 10, that is, have a cylindrical shape in which the inner space is emptied.

The motor housing 110 is disposed inside the outer housing. In this case, a predetermined gap is formed between the motor housing 110 and the outer housing, and a flow path through which air flows may be formed through the gap.

And the vane 120 for guiding the flow may be formed around the motor housing 110.

A stator, a rotor, and the like are coupled to the inside of the motor housing 110, and a rotation shaft 150 is installed through these centers. And the fan 140 is coupled to the rotating shaft 150 is rotated, the fan 140 may be disposed at the front end of the motor housing (110).

The bearing housing 130 is inserted into and fastened to one open side (ie, rear end) of the motor housing 110.

The bearing housing 130 provides a seating space for the bearing supporting the rotating shaft 150 and is a member coupled to cover an open portion of the motor housing 110.

The conventional bearing housing 30 (see Fig. 2) is provided with a plurality of assembly structures 31 (see Fig. 2) protruding in a way to obstruct the flow path, in order to engage with the conventional motor housing (10, Fig. 2). . For this reason, the problem which the flow path resistance increases has followed.

According to one embodiment of the present invention, as a part of the bearing housing 130 is inserted into one open side of the motor housing 110 and has a structure that is fastened to each other, the structure that obstructs the flow path can be deleted, thereby the flow path The resistance can be reduced.

Next, a coupling structure between the motor housing 110 and the bearing housing 130 in the housing assembly of the fan motor according to an embodiment of the present invention will be described in detail with reference to FIGS. 5 to 7.

5 is a view showing a coupling structure of the motor housing and the bearing housing constituting the housing assembly of the fan motor according to an embodiment of the present invention.

As shown, the motor housing 110 has a receiving space 119, through which the components of the motor including the stator, the rotor, etc. are mounted, and the motor housing body 111 formed of an open cylindrical shape on one side thereof. It includes.

At this time, the other side of the motor housing 110 may be formed with a shaft insertion hole 115 through which one end of the rotation shaft 150 (see FIG. 4) is installed.

On the other hand, the end of the motor housing main body 111 (that is, the lower end of the motor housing main body 111 of FIG. 5) is provided with an inner diameter expansion portion 113 whose inner diameter is expanded compared to the motor housing main body 111.

In addition, a female thread part 112 having a thread formed through the inner diameter may be formed at the point where the inner diameter expansion part 113 starts.

Bearing housing 130 may have a lid shape that is coupled to block the open one side of the cylindrical motor housing body 111 as shown.

In addition, the bearing housing 130 includes a shaft insertion hole 135 through which the other end of the rotation shaft 150 (see FIG. 4) penetrates through a center opposite to the motor housing body 111.

In this case, a predetermined accommodation space is provided in proximity to the shaft insertion hole 135 of the bearing housing 130, which may be used as a seating space 139 of the bearing supporting the rotation shaft 150 (see FIG. 4). .

Specifically, the bearing housing 130 includes a bearing housing body 131 having an outer diameter of a size accessible through the inner diameter expansion portion 113.

In addition, the end of the bearing housing main body 131 (that is, the upper end of the bearing housing main body 131 of FIG. 5) may be provided with an outer diameter reducing part 133 whose outer diameter is reduced to a size accessible through the motor housing main body 111. Can be.

At the point where the outer diameter reducing portion 133 starts, the male thread portion 132 screwed with the female thread portion 112 formed at the position at which the inner diameter expansion portion 113 of the motor housing body 111 starts is formed.

As such, the motor housing 110 and the bearing housing 130 can maintain a firm fastening state without using a fastening structure provided in a form that prevents a flow path for fastening therebetween.

Meanwhile, when the motor housing 110 and the bearing housing 130 are fastened to each other in such a structure, there is an advantage of securing concentricity, which will be described in detail with reference to FIG. 6.

6 is a view showing a cross-sectional structure after coupling of the motor housing and the bearing housing constituting the housing assembly of the fan motor according to an embodiment of the present invention.

Referring to FIG. 6, the motor housing main body 111 and the bearing housing main body 131 may be connected to each other while having two contact surfaces to secure concentricity.

At this time, the outer diameter of the inner diameter expansion portion 113 is formed in the same size as the outer diameter of the motor housing body 111 does not protrude outward through the mutually coupled circumferential surface has a shape that does not structurally increase the flow resistance.

In addition, since the thickness t2 of the inner diameter expansion part 113 is formed to be smaller than the thickness t1 of the motor housing main body 111, the inner diameter expansion part 113 has the same inner diameter as the outer diameter of the motor housing main body 111, and the inner diameter thereof. This may have an increased shape.

As such, when the thread 112a of the female thread part 112 and the thread 132a of the male thread part 132 are screwed together and fastened to each other, the inner surface 111a and the outer diameter of the motor housing body 111 are fastened. The outer surface 133a of the contraction portion 133 is in contact. As a result, a first contact surface is formed between the motor housing main body 111 and the outer diameter reducing portion 133 of the bearing housing 130.

In addition, when the thread 112a of the female thread part 112 and the thread 132a of the male thread part 132 are screwed together and fastened to each other, the inner surface 113a of the inner diameter expansion part 113 and the bearing housing body ( The outer side 131a of 131 is in contact. As a result, a second contact surface is formed between the inner diameter expansion portion 113 of the motor housing 100 and the bearing housing body 131.

As such, as long as the motor housing 110 and the bearing housing 130 are screwed in a simple manner, the motor housing 110 and the bearing housing 130 may be fastened to each other with at least two contact surfaces existing at different positions, thereby ensuring concentricity.

Next, after the motor housing 110 and the bearing housing 130 are fastened, the assembly is released, that is, loosening occurs due to disturbance such as vibration of the motor, and thus the function of preventing the bearing housing 130 from being separated. It demonstrates with reference to 5 and FIG.

5 and 7, the motor housing 110 is provided with a first anti-loosening protrusion 114, and the bearing housing 130 is engaged with and engaged with the first anti-loosening protrusion 114. 137.

When the bearing housing 130 is fastened to the motor housing 110, the first and second anti-loosening protrusions 114 and 137 are engaged with and fixed to each other.

After the bearing housing 130 is fastened to the motor housing 110, the bearing housing 130 is blocked from rotating in the direction opposite to the fastening. Therefore, even when various disturbances such as vibration of the motor occur, the fastening state of the bearing housing 130 is maintained, and the fastening of the bearing housing 130 may be unexpectedly released to prevent the motor housing 110 from being separated. .

The first anti-loosening protrusion 114 may be formed at the end of the inner diameter expansion portion 113.

As a specific example, the first anti-loosening protrusion 114 protrudes in a sawtooth shape for preventing rotation in the unwinding direction, and may be formed in the circumferential direction through the end of the inner diameter expansion part 113.

The second anti-loosening protrusion 137 is engaged step 136 (see FIG. 7) of the bearing housing body 131 facing the end of the inner diameter expansion part 113 when the motor housing 110 and the bearing housing 130 are fastened. It can be formed at the site.

As a specific example, the second anti-loosening protrusion 137 is fixedly engaged with each other when the first anti-loosening protrusion 114 rotates in the fastening direction, and once fixed, the second anti-loosening protrusion 137 has a sawtooth shape for blocking rotation in the unwinding direction. It may protrude. The second anti-loosening protrusion 137 may be formed in the circumferential direction through the coupling step 136 of the bearing housing body 131.

As described above, according to the configuration and operation of an embodiment of the present invention, the flow path resistance can be reduced by eliminating the structure that obstructs the flow in the high speed fan motor.

Furthermore, as the concentricity between the motor housing and the bearing housing can be maintained, the performance of the high speed fan motor can be improved.

Furthermore, by applying an anti-loosening structure in which the assembled state of the bearing housing is not released due to disturbance such as vibration caused during operation of the high speed fan motor, the detachment of the bearing housing during use of the motor can be prevented.

As described above, the present invention has been described with reference to the drawings, but the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that modifications can be made. In addition, even if the above described embodiments of the present invention while not explicitly described and described the operation and effect according to the configuration of the present invention, it is obvious that the effect predictable by the configuration is also to be recognized.

100: fan motor
110: motor housing
111: motor housing body
111a: first engagement surface
112: female thread
113: inner diameter extension
114: first loosening prevention projection
115: shaft insertion ball
119: accommodating space of the motor
120: vane
130: bearing housing
131: bearing housing body
132: male thread
133: outer diameter reducing portion
135: insert shaft
136: coupling step
137: the second anti-loosening protrusion
139: Seating space of bearing
140: fan
150: rotation axis

Claims (15)

A motor housing embedded in an outer housing forming an exterior of the fan motor, and having a vane forming a flow path between the outer housing and guiding flow through the circumference; And
And a bearing housing inserted into one open side of the motor housing and providing a seating space of a bearing supporting a rotation axis of the motor.
The motor housing and the bearing housing have at least two contact surfaces present at different positions and are fastened to each other to ensure concentricity.
Housing assembly of the fan motor.
The method of claim 1,
The motor housing includes a motor housing body provided in a cylindrical shape,
An end portion of the motor housing main body is provided with an inner diameter expansion portion, the inner diameter of which is expanded compared to the motor housing body,
A female screw portion is formed at a starting point of the inner diameter expansion portion.
Housing assembly of the fan motor.
The method of claim 2,
The outer diameter of the inner diameter expansion portion,
Is formed in the same size as the outer diameter of the motor housing body,
The thickness of the inner diameter expansion portion,
Characterized in that the size is smaller than the thickness of the motor housing body
Housing assembly of the fan motor.
The method of claim 2,
The bearing housing,
A bearing housing body having an outer diameter of a size connectable through the inner diameter expansion portion,
The outer end of the bearing housing main body is provided with an outer diameter reducing portion having an outer diameter reduced to a size accessible through the motor housing body,
The starting point of the outer diameter reduction portion is characterized in that the male screw portion is screwed with the female screw portion is formed
Housing assembly of the fan motor.
The method of claim 4, wherein
When fastening between the motor housing and the bearing housing,
A first contact surface is formed through the facing portion between the motor housing body and the outer diameter reducing portion,
A second contact surface is formed through the facing portion between the inner diameter expansion portion and the bearing housing body.
Housing assembly of the fan motor.
The method of claim 4, wherein
The motor housing has a first anti-loosening protrusion,
The bearing housing has a second anti-loosening protrusion engaged with the first anti-loosening protrusion and fastened thereto,
After the first and second loosening projections are fastened to each other, the motor housing and the bearing housing are prevented from rotating in a direction opposite to the fastening, thereby preventing the assembly from being released.
Housing assembly of the fan motor.
The method of claim 6,
The first anti-loosening protrusion is formed at the end of the inner diameter expansion portion,
The second anti-loosening protrusion is formed in the engagement step portion of the bearing housing body facing the end of the inner diameter expansion portion
Housing assembly of the fan motor.
The method of claim 7, wherein
The first loosening projection is,
It has a sawtooth shape, characterized in that formed in the circumferential direction through the end of the inner diameter expansion portion
Housing assembly of the fan motor.
The method of claim 7, wherein
The second loosening prevention projections,
It has a sawtooth shape, characterized in that formed in the circumferential direction through the engagement step portion of the bearing housing body
Housing assembly of the fan motor.
A motor housing embedded in an outer housing forming an exterior of the fan motor, and having a vane forming a flow path between the outer housing and guiding flow through the circumference; And
And a bearing housing inserted into one open side of the motor housing and providing a seating space of a bearing supporting a rotation axis of the motor.
The motor housing includes a motor housing body provided in a cylindrical shape, an end portion of the motor housing body is provided with an inner diameter extension portion in which an inner diameter is expanded compared to the motor housing body, and a female screw portion is formed at a starting point of the inner diameter extension portion.
The bearing housing includes a bearing housing body having an outer diameter of a size connectable through the inner diameter expansion portion, and an outer diameter reduction portion having an outer diameter reduced to a size accessible through the motor housing body is provided at an end of the bearing housing body. At the start point of the outer diameter reducing portion, a male screw portion is formed to be screwed with the female screw portion.
The motor housing and the bearing housing have at least two contact surfaces existing at different positions with the female and male threads interposed therebetween to ensure concentricity.
Housing assembly of the fan motor.
The method of claim 10,
The outer diameter of the inner diameter expansion portion,
Is formed in the same size as the outer diameter of the motor housing body,
The thickness of the inner diameter expansion portion,
Characterized in that the size is smaller than the thickness of the motor housing body
Housing assembly of the fan motor.
The method of claim 10,
When fastening between the motor housing and the bearing housing,
A first contact surface is formed through the facing portion between the motor housing body and the outer diameter reducing portion,
A second contact surface is formed through the facing portion between the inner diameter expansion portion and the bearing housing body.
Housing assembly of the fan motor.
The method of claim 10,
The motor housing has a first anti-loosening protrusion,
The bearing housing has a second anti-loosening protrusion engaged with the first anti-loosening protrusion and fastened thereto,
After the first and second loosening projections are fastened to each other, the motor housing and the bearing housing are prevented from rotating in a direction opposite to the fastening, thereby preventing the assembly from being released.
Housing assembly of the fan motor.
The method of claim 13,
The first anti-loosening protrusion is formed at the end of the inner diameter expansion portion,
The second anti-loosening protrusion is formed in the engagement step portion of the bearing housing body facing the end of the inner diameter expansion portion
Housing assembly of the fan motor.
The method of claim 14,
The first anti-loosening protrusion has a sawtooth shape, and is molded in the circumferential direction through the end of the inner diameter expansion portion,
The second anti-loosening protrusion has a sawtooth shape, and is formed in a circumferential direction through a coupling step portion of the bearing housing body.
Housing assembly of the fan motor.

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