KR20190077844A - Stator and motor having the same - Google Patents

Abstract

The present invention relates to a stator and a motor including the same. According to an embodiment of the present invention, the stator comprises: a plurality of stator units; an insulating member insulating the stator unit; and a first guide portion guiding the arrangement of the insulating member. The stator unit includes: a stator core; a coil wound around the stator core; and an insulator disposed between the stator core and the coil. The insulator includes: a body around which the coil is wound; an inner guide which protrudes from the inside of the body; an outer guide which protrudes from the outside of the body; and first protrusions which protrude in the circumferential direction in one regions of the side surfaces of the inner guide. Each of the first guide portions is a groove formed as the first protrusions disposed adjacent to each other are in contact with each other. Accordingly, the motor can prevent the flow and separation of insulating paper.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a stator,

Embodiments relate to a stator and a motor including the stator.

A motor is a device that obtains rotational force by converting electrical energy into mechanical energy. It is widely used in automobiles, home electronics, and industrial devices.

The motor may include a housing, a shaft, a stator disposed on an inner circumferential surface of the housing, a rotor installed on an outer circumferential surface of the shaft, and the like. Here, the stator of the motor induces electrical interaction with the rotor to induce rotation of the rotor.

Here, the stator may include a stator core, a coil wound around the stator core, and an insulator disposed between the stator core and the coil. The stator may further include an insulating paper disposed between the coil and the coil.

At this time, since the insulating paper is disposed in a state where the stator is assembled to the housing, it is difficult to assemble the insulating paper in a uniform position.

Further, when the space between the coil and the coil is formed, there is a problem that the insulating paper flows or goes out. As a result, there is a problem that insulation performance is deteriorated by the insulating paper.

Furthermore, when the insulating paper is detached, there is a problem that the insulating paper interferes with the rotation of the rotor. Accordingly, the separated insulating paper improves the possibility of failure of the motor.

Embodiments provide a stator and motor that prevent flow and escape of insulating paper.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned here can be understood by those skilled in the art from the following description.

According to an embodiment of the present invention, there is provided a stator comprising: a plurality of stator units; Wherein the stator includes a stator core, an insulator disposed in the stator core, and a coil wound around the insulator, wherein the stator core includes a coil wound around the insulator, The insulator includes a main body in which the coil is wound, an inner guide protruding from the inner side of the main body, an outer guide protruding from the outer side of the main body, and a first protrusion protruding in a circumferential direction from one side of the side face of the inner guide, The first guide portion is achieved by a stator which is a groove formed as the first projections, which are arranged adjacent to each other, come into contact with each other.

 The insulator includes a second protrusion protruding outward from a lower portion of the first protrusion, and an upper surface of the second protrusion can contact the lower surface of the insulation member.

The insulator may include an upper insulator and a lower insulator, and the second protrusion may be formed under the first protrusion of the lower insulator.

The stator may further include a second guide portion for guiding the arrangement of the insulating member, and the second guide portion may be provided as a slit formed by disposing the side surfaces of the outer guide disposed adjacent to each other apart from each other.

Here, the insulator includes a third protrusion protruding in a circumferential direction in a region below the side of the outer guide,

And the upper surface of the third projection may contact the lower surface of the insulating member.

The insulating member may be formed in a plate shape, and the insulating member may be guided by the first guide portion and the second guide portion.

The stator core includes a yoke and a tooth protruding radially from the yoke, and an outer surface of the insulating member can contact the inner circumferential surface of the yoke.

Meanwhile, the insulating member may include a plate portion and a side wall portion extending from both side ends of the plate portion, and the side wall portion may be guided by the first guide portion and the second guide portion.

Here, the height H1 of the inner surface of the side wall portion may be smaller than the height H2 of the outer surface.

The inner width W1 of the plate portion may be smaller than the outer width W2.

Further, the stator core may include a yoke and a tooth projecting radially from the yoke, and the outer surface of the side wall portion may contact the inner circumferential surface of the yoke.

Meanwhile, the insulating member may be an insulating paper.

According to an embodiment of the present invention, A stator disposed in the housing; A rotor disposed within the stator; A shaft engaged with the rotor; And a cover disposed on the housing, wherein the stator includes a plurality of stator units, an insulating member for insulating the stator unit, and a first guide unit for guiding the arrangement of the insulating member, An insulator disposed on the stator core and a coil wound around the insulator, wherein the insulator includes a main body in which the coil is wound, an inner guide protruding from the inside of the main body, an outer guide protruding from the outside of the main body, And a first protrusion protruding in a circumferential direction in one region of a side surface of the inner guide, wherein the first guide portion is achieved by a motor which is a groove formed as the first protrusions disposed adjacent to each other come into contact with each other.

The stator may further include a second guide portion for guiding the arrangement of the insulating member, and the second guide portion may be provided as a slit formed by disposing the side faces of the outer guide, which are adjacent to each other, .

The stator according to the embodiment and the motor including the stator can prevent the insulating paper from flowing and departing by using the first guide part and the second guide part.

1 is a view showing a motor according to an embodiment,
2 is a view showing an embodiment of a stator arranged in a motor according to an embodiment,
3 is a view showing a plurality of stator units arranged in the stator of the motor according to the embodiment,
4 and 5 are views showing a stator unit of a stator arranged in a motor according to an embodiment,
6 is a perspective view showing a stator core and an insulator of a stator unit disposed in a stator of a motor according to an embodiment,
7 is an exploded perspective view showing the stator core and the insulator of the stator unit disposed in the stator of the motor according to the embodiment,
8 is a perspective view showing an upper insulator of the motor according to the embodiment,
9 is a plan view showing an upper insulator of the motor according to the embodiment,
10 is a perspective view showing a lower insulator of the motor according to the embodiment,
11 is a plan view showing a lower insulator of the motor according to the embodiment,
12 is a front view showing the upper insulator of the motor according to the embodiment,
13 is a side view showing an embodiment of the insulating member,
14 is a view showing another embodiment of a stator arranged in a motor according to the embodiment,
15 is a side view showing another embodiment of the insulating member.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

In the description of the embodiments, when an element is described as being formed "on or under" another element, the upper or lower (lower) (on or under) all include that the two components are in direct contact with each other or that one or more other components are indirectly formed between the two components. Also, when expressed as 'on or under', it may include not only an upward direction but also a downward direction based on one component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

1 is a view showing a motor according to an embodiment.

Referring to FIG. 1, the motor 1 according to the embodiment includes a housing 100 having an opening formed at one side thereof, a cover 200 disposed at an upper portion of the housing 100, a stator 200 disposed inside the housing 100, A shaft 400 that rotates together with the rotor 400 and a bus bar 600 that is disposed on the upper side of the stator 300 and a shaft 500 that is disposed on the upper side of the stator 300, And a sensor unit 700 for detecting rotation. Herein, the inside refers to a direction disposed toward the center C with respect to the center C, and the outside refers to a direction opposite to the inside.

The motor 1 may be a motor used in EPS. The EPS (Electronic Power Steering System) assists the steering force by the driving force of the motor, thereby ensuring the turning stability and providing the quick resilience to enable the driver to drive safely.

The housing (100) and the cover (200) can form the outer shape of the motor (1). The housing 100 and the cover 200 may be coupled to each other to form a receiving space. Accordingly, the stator 300, the rotor 400, the shaft 500, and the like may be disposed in the accommodation space, as shown in FIG. At this time, the shaft 500 is rotatably disposed in the accommodation space. The motor 1 may further include a bearing 10 disposed at the upper portion and the lower portion of the shaft 500, respectively.

The housing 100 may be formed in a cylindrical shape. The housing 100 can house the stator 300, the rotor 400, and the like. At this time, the shape and material of the housing 100 may be variously modified. For example, the housing 100 may be formed of a metal material that can withstand high temperatures.

The cover 200 may be disposed on the opening surface of the housing 100, that is, above the housing 100, so as to cover the opening of the housing 100.

The stator 300 may be disposed inside the housing 100. At this time, the stator 300 may be supported on the inner peripheral surface of the housing 100. The stator 300 is disposed outside the rotor 400. That is, the rotor 400 may be rotatably disposed inside the stator 300.

3 is a view showing a plurality of stator units arranged on the stator of the motor according to the embodiment, and Fig. 4 and Fig. 5 are diagrams showing an example of the stator arranged in the motor according to the embodiment Fig. 3 is a view showing a stator unit of a stator arranged in a motor according to an example. Fig. Here, FIG. 2 shows the stator according to the first embodiment, which differs from the stator according to the second embodiment in the shape of the insulating member.

2 to 5, the stator 300 includes a plurality of stator units 300a disposed along the circumferential direction, an insulating member 340 for insulating the stator unit 300a from each other, and an insulating member 340 And may include a first guide portion 360 that guides the first guide portion 360. The stator 300 may further include a second guide portion 370 for guiding the arrangement of the insulating member 340. Here, the insulating member 340 is disposed between the stator units 300a to insulate the coils 320 of the stator unit 300a.

For example, a plurality of stator units 300a may be arranged along the circumferential direction, and an insulator 340 may be disposed between the coils 320 of the stator unit 300a to realize the stator 300. At this time, the insulating member 340 may be guided by the first guide portion 360 and the second guide portion 370 formed by arranging the stator unit 300a along the circumferential direction.

Fig. 6 is a perspective view showing a stator core and an insulator of a stator unit disposed in a stator of a motor according to an embodiment, and Fig. 7 is an exploded perspective view showing a stator core and an insulator of the stator unit arranged in the stator of the motor according to the embodiment .

4 to 7, the stator unit 300a includes a stator core 310, a coil 320 wound around the stator core 310, and a shield 320 disposed between the stator core 310 and the coil 320. [ (330).

The stator core 310 may be wound with a coil 320 forming a rotating magnetic field.

The stator core 310 may be formed by stacking a plurality of plates in the form of thin steel plates, but the present invention is not limited thereto. For example, the stator core 310 may be formed as a single unit.

Referring to FIG. 7, the stator core 310 may include an arc-shaped yoke 311 and a tooth 312. The tooth 312 may be formed to protrude in the radial direction from the inner circumferential surface 311a of the yoke 311 for winding the coil 320. Here, the yoke 311 and the tooth 312 are integrally formed as an example, but the present invention is not limited thereto.

Meanwhile, the teeth 312 may be disposed so as to face the magnets of the rotor 400. The coil 320 is wound on each of the teeth 312.

The insulator 330 insulates the stator core 310 and the coil 320. Accordingly, the insulator 330 may be disposed between the stator core 310 and the coil 320.

At this time, the coil 320 may be wound on the stator core 310 in which the insulator 330 is disposed. Then, the coil 320 can form a rotating magnetic field by power supply.

4 and 5, the insulator 330 may be disposed in the tooth 312 of the stator core 310 to insulate the stator core 310 and the coil 320. [ Here, the insulator 330 may be formed of a resin material.

The insulator 330 includes a main body 331 to which the coil 320 is wound, an inner guide 332 extending from the inner side of the main body 331 to protrude in the longitudinal direction of the shaft 500, A first protrusion 333 protruding in the circumferential direction in one region and an outer guide 335 protruding from the outside of the main body 331. Here, the main body 331, the inner guide 332, the first projection 333, and the outer guide 335 may be integrally formed.

The coil 320 may be wound on the main body 331.

The body 331 may be disposed on the tooth 312 of the stator core 310 to insulate the stator core 310 and the coil 320 from each other.

The main body 331 may be formed in a U shape and a groove 331a may be formed on an outer side surface of the main body 331. Here, the grooves 331a may have a concave groove shape. When the coil 320 is wound, the groove 331a can guide the placement of the coil 320. [

The inner guide 332 supports the coil 320 wound on the main body 331 to prevent the coil 320 from falling inward.

The inner guide 332 can be disposed inside the main body 331. The inner guide 332 may be formed to protrude in the axial direction and the circumferential direction from the inside of the main body 331. Here, the axial direction may be the longitudinal direction of the shaft 500.

The first protrusion 333 may protrude in a circumferential direction in one area of the side surface 332a of the inner guide 332. [

At this time, as the side surfaces 333a of the first projections 333 disposed adjacent to each other are in contact with each other, the first guide portion 360 can be formed. For example, the first guide portion 360 may be disposed between the inner guide 332 of one stator unit 300a and the inner guide 332 of another stator unit 300a disposed adjacent thereto.

As shown in FIG. 2, the first guide portion 360 may be provided with a recessed groove 360. Here, the first guide part 360 is provided as a groove, but the present invention is not limited thereto.

Accordingly, the groove 360 guides the placement of the insulating member 340. Thus, the groove 360 has an inner end portion 340a of the insulating member 340 disposed thereon.

The insulator 330 may include a second protrusion 334 protruding outward from a lower portion of the first protrusion 333 formed in the inner guide 332.

And the second projection 334 can serve as a latching jaw. For example, when the insulating member 340 is guided by the groove 360, the upper surface 334a of the second projection 334 moves the insulating member 340 only to a predetermined position. The upper surface 334a of the second projection 334 can contact the lower surface of the insulating member 340. [

The outer guide 335 supports the coil 320 wound on the body 331 to prevent the coil 320 from being deviated outwardly.

The outer guide 335 may be disposed outside the main body 331. The outer guide 335 may be formed to protrude in the axial direction and the circumferential direction from the outside of the main body 331.

As shown in FIG. 2, the side surfaces 335a of the outer guides 335 disposed adjacent to each other are spaced apart from each other, so that the second guide portion 370 can be formed. For example, the second guide portion 370 may be disposed between the outer guide 335 of one stator unit 300a and the outer guide 335 of another stator unit 300a disposed adjacent thereto.

As shown in FIG. 2, the second guide portion 370 may be provided as a slit 370, which is a space. Here, the second guide portion 370 is provided as a slit, but is not limited thereto.

Accordingly, the slit 370 guides the placement of the insulating member 340. The outer end 340b of the insulating member 340 is disposed in the slit 370. [

The insulator 330 may include a third protrusion 336 protruding from the lower side of the side surface 335a of the outer guide 335 in a circumferential direction.

And the third projection 336 can serve as a latching jaw. For example, when the insulating member 340 is guided by the slit 370, the upper surface 336a of the third projection 336 moves the insulating member 340 to only a predetermined position. The upper surface 336a of the third projection 336 can contact the lower surface of the insulating member 340. [

6 and 7, the insulator 330 includes an upper insulator 330a disposed on the top and sides of the tooth 312, a lower insulator 330b disposed on the bottom and sides of the tooth 312, Can be distinguished.

FIG. 8 is a perspective view showing an upper insulator of a motor according to the embodiment, and FIG. 9 is a plan view showing an upper insulator of the motor according to the embodiment.

7 to 9, the upper insulator 330a may include a main body 331, an inner guide 332, a first protrusion 333, and an outer guide 335. At this time, the main body 331 of the upper insulator 330a is disposed on the top and sides of the tooth 312.

FIG. 10 is a perspective view showing a lower insulator of a motor according to the embodiment, FIG. 11 is a plan view showing a lower insulator of the motor according to the embodiment, and FIG. 12 is a front view showing an upper insulator of the motor according to the embodiment.

7 and 10 to 12, the lower insulator 330b includes a body 331, an inner guide 332, a first projection 333, a second projection 334, an outer guide 335, 3 protrusions 336, as shown in FIG. At this time, the main body 331 of the lower insulator 330b is disposed on the lower and side surfaces of the tooth 312.

The second protrusion 334 of the lower insulator 330b may be formed to extend outward from the lower portion of the first protrusion 333.

The third protrusion 336 of the lower insulator 330b may be formed to extend in the circumferential direction on the lower side of the side surface 335a of the outer guide 335. [

That is, the lower insulator 330b differs from the upper insulator 330a in that the lower insulator 330b includes the second protrusion 334 and the third protrusion 336.

13 is a side view showing one embodiment of the insulating member.

Referring to FIGS. 2 and 13, the insulating member 340 is disposed between the stator units 300a to insulate the coil 320. As shown in FIG. Here, the insulating member 340 may be referred to as a first insulating member 340.

The insulating member 340 may be formed in a rectangular parallelepiped shape as shown in Fig. Here, the insulating member 340 may be an insulating paper.

Each of the inner end portion 340a and the outer end portion 340b of the insulating member 340 is guided by the first guide portion 360 and the second guide portion 370 and disposed between the stator unit 300a. The lower surface 341 of the insulating member 340 is in contact with the upper surface 334a of the second projection 334 and the upper surface 336a of the third projection 336 so that the insulating member 340 is positioned at a predetermined position .

The outer end surface 342 of the insulating member 340 may be in contact with the inner circumferential surface 311a of the yoke 311 of the stator core 310. [

Therefore, the insulating member 340 is prevented from flowing and being separated by the second projection 334, the third projection 336, the first guide portion 360, and the second guide portion 370.

Fig. 14 is a view showing another embodiment of a stator arranged in a motor according to the embodiment, and Fig. 15 is a side view showing another embodiment of the insulating member. Here, FIG. 14 is a view showing the stator according to the second embodiment.

14, the stator 300 includes a stator 300a having a plurality of stator units 300a arranged along the circumferential direction, an insulating member 350 covering the coils 320 of the stator unit 300a, And a first guide portion 360 guiding the disposition of the first guide portion 350. The stator 300 may further include a second guide portion 370 for guiding the arrangement of the insulating member 350. Here, as the insulating member 350, insulating paper may be provided. Accordingly, the insulating paper is flexible and light in weight, and does not greatly affect the performance of the motor.

The insulating member 350 of the stator 300 according to the second embodiment may be referred to as a second insulating member 350 to distinguish it from the insulating member 340 of the stator 300 according to the first embodiment.

14 and 15, the insulating member 350 may include a plate portion 351 and a side wall portion 352 protruding to one side from both side ends of the plate portion 351. At this time, the plate portion 351 may be disposed above the coil 320. The sidewall portion 352 may be disposed between the coils 320.

The side wall portion 352 is guided by the first guide portion 360 and the second guide portion 370 and disposed between the stator unit 300a.

The lower surface 352a of the side wall portion 352 contacts the upper surface 334a of the second projection 334 and the upper surface 336a of the third projection 336 to position the insulating member 340 at a predetermined position .

The outer surface 352b of the side wall portion 352 may be in contact with the inner circumferential surface 311a of the yoke 311 of the stator core 310 at this time.

Therefore, the insulating member 350 is prevented from flowing and being separated by the second projection 334, the third projection 336, the first guide portion 360, and the second guide portion 370. [

The height H1 of the inner surface 352c of the side wall portion 352 may be smaller than the height H2 of the outer surface 352b. Accordingly, the plate portion 351 can be inclined at a predetermined angle? With respect to the lower surface 352a of the side wall portion 352.

That is, since the coil 320 can be increased in its point rate toward the outside, the plate portion 351 can be formed to have a predetermined angle?.

The inner width W1 of the plate portion 351 may be smaller than the outer width W2. For example, the plate portion 351 may be formed in a trapezoidal shape.

As shown in Fig. 14, the insulating member 350 is continuously disposed in the stator unit 300a along the circumferential direction, but the present invention is not limited thereto. For example, the insulating member 350 may be arranged in one stator unit 300a along the circumferential direction, and then disposed in the stator unit 300a after skipping the neighboring stator unit 300a.

The rotor 400 may be disposed inside the stator 300. The shaft 500 may be coupled to the center.

The rotor 400 may include a magnet (not shown) coupled to a rotor core (not shown). For example, the rotor 400 may be of a type in which a magnet is disposed on the outer circumferential surface of the rotor core.

Therefore, the magnet forms a rotating magnetic field with the coil 320 wound around the stator 300. [ The magnet may be disposed such that the N pole and the S pole alternate along the circumferential direction about the shaft 500.

As a result, the rotor 400 rotates due to the electrical interaction between the coil 320 and the magnet, and when the rotor 400 rotates, the shaft 500 rotates and the driving force of the motor 1 is generated.

Meanwhile, the rotor core of the rotor 400 may be fabricated by combining a plurality of divided cores, or may be fabricated into a single core formed of a single cylinder. Here, the rotor core may be formed in a shape in which a plurality of plates in the form of a circular thin steel plate are laminated.

The shaft 500 can be rotatably supported inside the housing 100 by a bearing 10, as shown in Fig. The shaft 500 can rotate together with the rotation of the rotor 400.

The bus bar 600 may be disposed on the upper portion of the stator 300.

The bus bar 600 may be electrically connected to the coil 320 of the stator 300.

The bus bar 600 may include a bus bar body and a plurality of terminals disposed inside the bus bar body. Here, the bus bar body may be a mold material formed through injection molding. Each of the terminals may be electrically connected to the coil 320 of the stator 300.

The sensor unit 700 senses the magnetic force of the sensing magnet installed in a rotatable manner with respect to the rotor 400 and detects the rotation of the shaft 500 by sensing the current position of the rotor 400.

The sensor unit 700 may include a sensing magnet assembly 710 and a printed circuit board (PCB) 720.

The sensing magnet assembly 710 is coupled to the shaft 500 to cooperate with the rotor 400 to detect the position of the rotor 400. At this time, the sensing magnet assembly 710 may include a sensing magnet and a sensing plate. The sensing magnet and the sensing plate may be coupled to each other with a coaxial axis.

The sensing magnet may include a main magnet disposed in the circumferential direction adjacent to the hole forming the inner circumferential surface and a sub magnet formed at the edge. The main magnet can be arranged in the same manner as the drive magnet inserted in the rotor 400 of the motor. The submagnet is divided into more poles than the main magnet. As a result, it is possible to measure the rotational angle more finely and measure it, and it is possible to smoothly drive the motor

The sensing plate may be formed of a disc-shaped metal material. A sensing magnet may be coupled to the upper surface of the sensing plate. And the sensing plate may be coupled to the shaft 500. Here, a hole through which the shaft 500 penetrates is formed in the sensing plate.

A sensor for sensing the magnetic force of the sensing magnet may be disposed on the printed circuit board 720. At this time, the sensor may be provided as a Hall IC. The sensor may generate a sensing signal by detecting a change in the N and S poles of the sensing magnet.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the appended claims. It will be understood that the present invention can be changed. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

1: motor
100: Housing
200: cover
300: stator 310: stator core
320: Coil
330: insulator 331: main body
332: inner guide 333: first projection
334: second projection 335: outer guide
336: third projection
340, 350: Insulation member
400: Rotor
500: Shaft
600: bus bar
700:

Claims (12)

A plurality of stator units;
An insulating member for insulating the stator unit; And
And a first guide portion for guiding the arrangement of the insulating member,
The stator unit
Stator core,
A coil wound around the stator core and
And an insulator disposed between the stator core and the coil,
The insulator
A main body in which the coil is wound,
An inner guide protruding from the inside of the main body,
An outer guide projecting from the outside of the main body;
And a first projection projecting in a circumferential direction in one area of a side surface of the inner guide,
Wherein the first guide portion is a groove formed as the first projections disposed adjacent to each other come into contact with each other. The method according to claim 1,
Wherein the insulator includes a second protrusion protruding outward from a lower portion of the first protrusion,
And the upper surface of the second projection is in contact with the lower surface of the insulating member. 3. The method of claim 2,
The insulator includes an upper insulator and a lower insulator,
And the second projection is formed under the first projection of the lower insulator. 4. The method according to any one of claims 1 to 3,
Further comprising a second guide portion for guiding the arrangement of the insulating member,
Wherein the second guide portion is provided as a slit formed by disposing side surfaces of the outer guide disposed adjacent to each other. 5. The method of claim 4,
Wherein the insulator includes a third projection projecting in a circumferential direction in a region on a lower side of a side surface of the outer guide,
And the upper surface of the third projection is in contact with the lower surface of the insulating member. 6. The method of claim 5,
Wherein the insulating member is formed in a plate shape,
Wherein the insulating member is guided by the first guide portion and the second guide portion. The method according to claim 6,
The stator core including a yoke and a tooth projecting radially from the yoke,
And the outer surface of the insulating member contacts the inner peripheral surface of the yoke. 6. The method of claim 5,
The insulating member
And a side wall portion extending from both side ends of the plate portion,
And the side wall portion is guided by the first guide portion and the second guide portion. 9. The method of claim 8,
And the height H1 of the inner surface of the side wall portion is smaller than the height H2 of the outer surface. 10. The method of claim 9,
And an inner width (W1) of the plate portion is smaller than the outer width (W2). 10. The method of claim 9,
The stator core including a yoke and a tooth projecting radially from the yoke,
And the outer surface of the side wall portion is in contact with the inner circumferential surface of the yoke. housing;
A stator disposed in the housing;
A rotor disposed within the stator;
A shaft engaged with the rotor; And
And a cover disposed on the housing,
The stator
A plurality of stator units,
An insulating member for insulating the stator unit and
And a first guide portion for guiding the arrangement of the insulating member,
The stator unit
Stator core,
A coil wound around the stator core and
And an insulator disposed between the stator core and the coil,
The insulator
A main body in which the coil is wound,
An inner guide protruding from the inside of the main body,
An outer guide projecting from the outside of the main body;
And a first projection projecting in a circumferential direction in one area of a side surface of the inner guide,
Wherein the first guide portion is a groove formed as the first projections disposed adjacent to each other come into contact with each other.

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