JP2012227987A - Electric blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric blower that enables insulation paper, an upper insulation member and a lower insulation member to be securely held in a stator core without forming a mounting hole on the stator core.SOLUTION: This electric blower includes: a stator core 12 having a yoke portion 18 and magnetic pole portions 19; insulation paper 13 disposed along an inner face of the stator core 12; an upper insulation member 15 having a projection 26; and a lower insulation member 16 having a projection 30. A notch 21a opening on the upper face side of the stator core 12 and a notch 21b opening on the lower face side are formed in positions of the insulation paper 13 opposing to the yoke portion 18. A side face 26a of the projection 26 is pressed against the yoke portion 18 within the notch 21a, and a tip portion 26b of the projection 26 opposes to the insulation paper 13 from the side opposite to the yoke portion 18. A side face of the projection 30 is pressed against the yoke portion 18 within the notch 21b, and a tip portion of the projection 30 opposes to the insulation paper 13 from the side opposite to the yoke portion 18.

Description

  The present invention relates to an electric blower.

Patent Document 1 below discloses an electric motor used for an electric blower.
In the device described in Patent Document 1, insulating paper is arranged in a stator slot of a stator core, and an upper insulating member is arranged from the upper surface side of the stator core and a lower insulating member is arranged from the lower surface side.

Specifically, in the thing of patent document 1, the triangular projection part is formed in the center both edge part of insulating paper. The insulating paper is fixed to the stator core by sandwiching the stator core from above and below by both protrusions.
The upper insulating member and the lower insulating member are fixed to the stator core by press-fitting a protruding portion formed in a pin shape into an attachment hole formed on the upper surface or the lower surface of the stator core.

JP 2005-229726 A

  In the one described in Patent Document 1, the insulating paper cannot be firmly held on the stator core, and the position of the insulating paper is shifted during winding, resulting in a work defect or the stator core and the winding. Insulation failure may occur during the period.

  Moreover, in the thing of patent document 1, in order to fix an upper insulating member and a lower insulating member, the attachment hole is formed in the stator core. For this reason, the magnetic flux density is concentrated in the vicinity of the mounting hole, and there is a problem that the motor efficiency is lowered.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide insulating paper, an upper insulating member, and a lower insulating member as a stator core without forming attachment holes in the stator core. An electric blower that can be reliably held is provided.

  The electric blower according to the present invention is arranged along a stator core having a yoke part and a magnetic pole part protruding from the yoke part, and along an inner surface of the stator core, and is arranged at a position facing the yoke part at the stator. An insulating paper having a first notch opening on the upper surface side of the core and a second notch opening on the lower surface side; and an upper insulating member having a first protrusion pressed into the stator core from the upper surface side; A lower insulating member having a second projecting portion press-fitted into the stator core from the lower surface side, the first projecting portion having a side surface pressed against the yoke portion within the first notch, and an end portion Opposite side of the yoke part is opposed to the insulating paper, the second projecting part is pressed against the yoke part in the second notch, and the end part is opposed to the insulating paper from the opposite side of the yoke part It is.

  Further, an electric blower according to the present invention includes a stator core having a yoke part and a pair of magnetic pole parts protruding from the yoke part and arranged at positions facing each other, and the stator core on one side of the magnetic pole part. A first insulating paper disposed along the side surface and having a first notch opened on the upper surface side of the stator core and a second notch opened on the lower surface side at a position opposite to the yoke portion; A third notch opened on the upper surface side of the stator core and a fourth notch opened on the lower surface side are formed on the other side along the inner surface of the stator core and at positions facing the yoke portion. A second insulating paper, an upper insulating member having a pair of first protrusions press-fitted to the stator core from its upper surface side, and a pair of second protrusions press-fitted to the stator core from its lower surface side. A lower insulating member, and the first side of one of the first protrusions is pressed against the yoke portion within the first notch And the end faces the first insulating paper from the opposite side of the yoke portion, and the other first projection portion has the second side surface facing the opposite side of the first side surface in the third notch to the yoke portion. Pressed, the end faces the second insulating paper from the opposite side of the yoke part, and the one side of the second protrusion is pressed against the yoke part with the third side face within the second notch. The opposite side of the iron part is opposed to the first insulating paper, and the other second protrusion is pressed against the yoke part in the fourth notch with the fourth side face facing the opposite side of the third side face, and the end part is It faces the second insulating paper from the opposite side of the yoke part.

With the electric blower according to the present invention, it is possible to reliably hold the insulating paper on the stator core, and it is possible to prevent work defects and insulation defects between the stator core and the windings.
Further, since the upper insulating member and the lower insulating member can be held on the stator core without forming the mounting hole, the motor efficiency can be improved.

It is sectional drawing which shows the electric blower in Embodiment 1 of this invention. It is a perspective view which shows the stator of the electric blower in Embodiment 1 of this invention. It is a perspective view which shows the stator core of the electric blower in Embodiment 1 of this invention. It is a perspective view which shows the insulating paper of the electric blower in Embodiment 1 of this invention. It is the front view which expanded the principal part of the insulating paper shown in FIG. It is a perspective view which shows the upper insulation member of the electric blower in Embodiment 1 of this invention. FIG. 7 is a cross-sectional view of the upper insulating member shown in FIG. 6. It is a principal part expanded sectional view of the upper insulation member shown in FIG. It is DD arrow line view shown in FIG.

  In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
1 is a cross-sectional view showing an electric blower according to Embodiment 1 of the present invention.
In FIG. 1, 1 is a fan cover of an electric blower, and 2 is a motor frame. The fan cover 1 is formed with an air inlet 3 for taking air into the electric blower at the center thereof. The motor frame 2 is formed with an exhaust port 4 for discharging the air in the electric blower to the outside.

  5 is a fan for sucking air from the air inlet 3 into the electric blower, 6 is a guide vane, 7 is a rectifying brush device, and 8 is a bracket. The fan 5 is fixed to a shaft 9 provided to be rotatable with respect to the motor frame 2. 10 is a stator provided on the motor frame 2 side, and 11 is a rotor provided on the shaft 9.

  In the electric blower having the above configuration, when electric power is supplied and current flows through the wires wound around the stator 10 and the rotor 11, the shaft 9 is centered on the rotor 11 by the magnetic field excited by the stator 10. The force in the rotational direction is applied, and the fan 5 rotates together with the shaft 9. As the fan 5 rotates, external air is sucked into the electric blower from the air inlet 3. The air that has entered the electric blower from the intake port 3 passes through the guide vanes 6, passes between the stator 10 and the motor frame 2, and is discharged from the exhaust port 4. The electric motor is cooled by the air flow generated in the electric blower.

Hereinafter, the stator 10 will be described in detail with reference to FIGS.
FIG. 2 is a perspective view showing the stator of the electric blower according to Embodiment 1 of the present invention. The main part of the stator 10 includes a stator core 12, insulating papers 13 and 14, an upper insulating member 15, a lower insulating member 16, and a stator winding 17.

FIG. 3 is a perspective view showing a stator core of the electric blower according to Embodiment 1 of the present invention.
The stator core 12 is provided with a yoke portion 18 and a pair of magnetic pole portions 19. The yoke portion 18 has a quadrangular ring shape as a whole. When the yoke portion 18 has the above-described configuration, a space (central space) through which the shaft 9 passes is formed in the central portion of the stator core 12.

The magnetic pole portion 19 is provided on the yoke portion 18 so as to protrude from the yoke portion 18 toward the central space. The magnetic pole portions 19 are arranged to face each other with the central space in between. The stator core 12 (the yoke portion 18) has a width of the parallel portion where the magnetic pole portion 19 is not provided (distance A shown in FIG. 3) and a width of the parallel portion where the magnetic pole portion 19 is provided (FIG. 3). It is formed to be smaller than the distance B) shown in FIG.
Note that L shown in FIG. 3 is the thickness of the stator core 12 (the distance between the upper surface and the lower surface).

  Hereinafter, for the stator 10, the direction indicated by A in FIG. 3 is also expressed as “horizontal”, and the direction indicated by B is also expressed as “vertical”. That is, A is the lateral width (distance between the lateral outer surfaces) of the stator core 12 (the yoke portion 18), and B is the longitudinal width (between the longitudinal outer surfaces of the stator core 12). Distance). Further, a is the distance between the inner side surfaces of the yoke portion 18 in the lateral direction. a has shown the distance between the opposing side surfaces of the yoke part 18 of the parallel part in which the magnetic pole part 19 is not provided.

Stator slots 20 are formed in the stator core 12 on both sides of the magnetic pole portion 19. The stator slot 20 accommodates (a part of) the stator winding 17.
Each stator slot 20 and the central space are not formed independently. A continuous surface forming each stator slot 20 and the central space constitutes the inner surface of the stator core 12.

  The stator core 12 is formed by laminating the electromagnetic steel sheets having the outer shape shown in FIG. 3 until the total thickness becomes L. The magnetic steel sheet having the above-described outer shape is formed by pressing a rolled non-oriented silicon steel sheet. There is a difference between the magnetic permeability in the rolling direction and the magnetic permeability in the direction perpendicular thereto, and the magnetic permeability in the rolling direction tends to be better. For this reason, in the stator core 12, each electromagnetic steel plate is arrange | positioned so that a rolling direction may become the said vertical direction. Moreover, the non-directional silicon steel sheet wound by roll shape is used in the said press work, and in order to improve material picking, the roll width | variety is the width of the stator core 12 (distance between outer surfaces of a horizontal direction). Designed to be the same as A.

4 is a perspective view showing the insulating paper of the electric blower according to Embodiment 1 of the present invention, and FIG. 5 is an enlarged front view of the main part of the insulating paper shown in FIG.
The insulating paper 13 is made of a predetermined film having a thickness t = 0.1 to 0.5 mm which is excellent in electrical insulation. The insulating paper 13 is disposed on one side of the magnetic pole portion 19 along the inner surface of the stator core 12 so as to face the inner surface.

  The insulating paper 13 is bent so that one end side and the other end side have the same shape as the stator slot 20. One end of the insulating paper 13 is disposed between the stator core 12 and the stator winding 17 in the stator slot 20 formed on one side of the one magnetic pole portion 19. The other end side of the insulating paper 13 is disposed between the stator core 12 and the stator winding 17 in a stator slot 20 formed on one side of the other magnetic pole portion 19. An intermediate portion of the insulating paper 13 is disposed along the yoke portion 18 so as to face the yoke portion 18.

The insulating paper 13 has a U-shaped notch 21a (first notch) that opens on the upper surface side of the stator core 12 and an underside of the stator core 12 at an intermediate portion facing the yoke portion 18. An open U-shaped notch 21b (second notch) is formed. E shown in FIG. 5, the notch 21a and 21b of the width (opening width), _{M 1} is the depth of the notch 21a and 21b. The notches 21 a and 21 b are formed at the same position with respect to the length of the insulating paper 13. Therefore, if the width on the short side of the insulating paper 13 is C and the distance between the notches 21a and 21b is M, C = M + M ₁ + M ₁ is satisfied.
The width C of the insulating paper 13 is formed to be, for example, about 2 to 6 mm longer than the thickness L of the stator core 12.

  The insulating paper 14 disposed on the other side of the magnetic pole portion 19 has the same configuration as that of the insulating paper 13. That is, the insulating paper 14 is constituted by a predetermined film having a thickness t = 0.1 to 0.5 mm which is excellent in electrical insulation. The insulating paper 14 is disposed on the other side of the magnetic pole portion 19 along the inner surface of the stator core 12 so as to face the inner surface.

  The insulating paper 14 is bent so that one end side and the other end side are the same as the shape of the stator slot 20. One end side of the insulating paper 14 is disposed between the stator core 12 and the stator winding 17 in the stator slot 20 formed on the other side of the one magnetic pole portion 19. The other end side of the insulating paper 14 is disposed between the stator core 12 and the stator winding 17 in the stator slot 20 formed on the other side of the other magnetic pole portion 19. An intermediate portion of the insulating paper 14 is disposed along the yoke portion 18 so as to face the yoke portion 18. The intermediate portion of the insulating paper 14 faces the intermediate portion of the insulating paper 13 with the central space in between.

  As with the insulating paper 13, the insulating paper 14 has a U-shaped notch 22a (third notch) opened on the upper surface side of the stator core 12 at an intermediate portion facing the yoke portion 18. A U-shaped cutout 22b (fourth cutout) is formed on the lower surface side of the stator core 12.

  6 is a perspective view showing the upper insulating member of the electric blower according to Embodiment 1 of the present invention, FIG. 7 is a cross-sectional view of the upper insulating member shown in FIG. 6, and FIG. 8 is an enlarged view of the main part of the upper insulating member shown in FIG. FIG. 9 is a sectional view taken along the line DD in FIG.

  The upper insulating member 15 is made of a predetermined insulating resin and is disposed on the upper surface side of the stator core 12. The upper insulating member 15 includes a main body 23 facing the upper surface of the stator core 12, an insulating wall 24 provided on the main body 23, a terminal block 25, a pair of protrusions 26 and 27 (first protrusions), A pair of protrusions 28 and 29 (third protrusions) are provided.

The insulating wall 24 is for ensuring a predetermined insulating property between the stator winding 17 and the rotor 11 and the bracket 8. The insulating wall 24 is disposed so as to cover the central space side and a part of the upper side of the stator winding 17. The terminal block 25 holds lead wires from the stator winding 17 and the rectifying brush device 7. belongs to. The main body 23 is provided with a plurality of terminal blocks 25 as necessary.

  The protrusions 26 to 29 are for fixing the upper insulating member 15 to the stator core 12. The protrusions 26 to 29 protrude from the main body 23 to the lower surface side of the stator core 12 and are press-fitted into the stator core 12 from the upper surface side of the stator core 12.

The protruding portion 26 is provided at a position corresponding to the notch 21 a of the insulating paper 13. The side surface 26 a of the root portion of the protrusion 26 is pressed against the side surface of the yoke portion 18 (the inner surface of the stator core 12) in the notch 21 a of the insulating paper 13. In the figure, J is the width (vertical direction distance) of the side surface 26a, and F is the core thickness direction distance of the side surface 26a. The side surface 26 a that contacts the yoke portion 18 has a width J that is substantially the same as the width E of the notch 21 a of the insulating paper 13, and the distance J is smaller than the depth M ₁ of the notch 21 a of the insulating paper 13. Is set to

  The protrusion 26 has a step formed between the root portion (the side surface 26a (first side surface) thereof) and the tip end portion 26b (side surface thereof). The size G of the step is set larger than the thickness t of the insulating paper 13. For this reason, the front-end | tip part 26b of the projection part 26 is arrange | positioned so that it may oppose the insulating paper 13 from the other side of the yoke part 18 in the lower surface side of the stator core 12 rather than the notch 21a.

  The protrusion 27 is provided at a position corresponding to the notch 22 a of the insulating paper 14. The protrusion 27 has a symmetric configuration with the protrusion 26 and is disposed on the opposite side of the protrusion 26 with the central space in between.

The side surface 27 a (second side surface) of the root portion of the protrusion 27 is pressed against the side surface of the yoke portion 18 (inner side surface of the stator core 12) in the notch 22 a of the insulating paper 14. For even side 27a, the width J is almost the same size as the width E of the notch 22a of the insulating paper 14, core thickness direction distance J is set to be smaller than the depth M ₁ of the notch 22a of the insulating paper 14 ing. Further, the protrusion 27 has a step between the root portion (the side surface 27a) and the tip portion 27b (the side surface). The size G of the step is set larger than the thickness t of the insulating paper 14. For this reason, the tip 27b of the protrusion 27 is disposed on the lower surface side of the stator core 12 from the notch 22a so as to face the insulating paper 14 from the opposite side of the yoke 18.

  The side surfaces 26a and 27a face the opposite sides of each other and are arranged in parallel. The distance K between the side surfaces 26 a and 27 a is set to have the same dimension as the distance a between the inner side surfaces in the lateral direction of the yoke portion 18.

  The protrusions 28 and 29 are formed with side surfaces (fifth side surface and sixth side surface) that are orthogonal to the side surfaces 26a and 27a and face each other. When the protrusion 28 is press-fitted into the stator core 12, the side surface facing the protrusion 29 is pressed against the outer surface of the stator core 12. When the protrusion 29 is press-fitted into the stator core 12, the side surface facing the protrusion 28 is pressed against the outer surface of the stator core 12. A distance Q between the side surfaces of the projecting portions 28 and the side surfaces of the projecting portions 29 facing each other is set to have the same dimension as the vertical width (distance between outer surfaces in the vertical direction) B of the stator core 12.

  The configuration of the lower insulating member 16 is the same as that of the upper insulating member 15. That is, the lower insulating member 16 is made of a predetermined insulating resin and is disposed on the lower surface side of the stator core 12. The lower insulating member 16 includes a main body portion opposed to the lower surface of the stator core 12, and a pair of projecting portions 30 and 31 corresponding to the insulating wall, the terminal block, and the projecting portions 26 and 27 provided on the main body portion (second housing). (Projection part) (projection part 31 is not shown) and a pair of projection parts (fourth projection part) corresponding to the projection parts 28 and 29 (not shown).

  The protrusions provided on the lower insulating member 16 are for fixing the lower insulating member 16 to the stator core 12. Each of the protrusions protrudes from the main body portion to the upper surface side of the stator core 12 and is press-fitted into the stator core 12 from the lower surface side of the stator core 12.

The protrusion 30 is provided at a position corresponding to the notch 21 b of the insulating paper 13. The side surface (third side surface) of the root portion of the protrusion 30 is pressed against the side surface of the yoke portion 18 (inner side surface of the stator core 12) in the notch 21 b of the insulating paper 13. The side surface of the protrusion 30 also has a width (vertical distance) J and a core thickness direction distance F. When the core thickness direction distance of the side surface 26a of the protrusion 26 is F ₁ and the core thickness direction distance of the side surface of the protrusion 30 is F ₂ , M + F ₁ + F ₂ ≦ L is satisfied.
The protrusion 30 also has a step G having a size G between the root portion and the tip portion. For this reason, the front-end | tip part of the projection part 30 is arrange | positioned so that it may oppose the insulating paper 13 from the other side of the yoke part 18 in the upper surface side of the stator core 12 rather than the notch 21b.

  The protrusion 31 (not shown) is provided at a position corresponding to the notch 22 b of the insulating paper 14. The protrusion 31 has a symmetric configuration with the protrusion 30 and is disposed on the opposite side of the protrusion 30 with the central space in between.

The side surface (fourth side surface) of the base portion of the protrusion 31 is pressed against the side surface of the yoke portion 18 (the inner surface of the stator core 12) in the notch 22 b of the insulating paper 14. The side surface of the protrusion 31 also has a width (vertical distance) J and a core thickness direction distance F. When the core thickness direction distance of the side surface 27a of the protrusion 27 is F ₃ and the core thickness direction distance of the side surface of the protrusion 31 is F ₄ , M + F ₃ + F ₄ ≦ L is established.
The protrusion 31 also has a step G having a size G between the root portion and the tip portion. For this reason, the front-end | tip part of the projection part 31 is arrange | positioned so that it may oppose the insulating paper 14 from the other side of the yoke part 18 in the upper surface side of the stator core 12 rather than the notch 22b.

  Specific description of other configurations of the lower insulating member 16 is omitted. In addition, the side surfaces in the fourth projecting portion of the lower insulating member 16 corresponding to the fifth side surface and the sixth side surface in the third projecting portion of the upper insulating member 15 are the seventh side surface and the eighth side surface, respectively.

Next, a method for manufacturing the stator 10 having the above configuration will be described.
First, with respect to the stator core 12, the insulating paper 13 is inserted into the stator slot 20 on one side of the magnetic pole part 19, and the insulating paper 14 is inserted into the stator slot 20 on the other side of the magnetic pole part 19. When the insulating papers 13 and 14 are appropriately disposed in the stator slot 20, the upper insulating member 15 is disposed on the upper surface side of the stator core 12, and the protrusions 26 to 29 are press-fitted into the stator core 12. At this time, the protrusion 26 is aligned with the opening position of the notch 21a, and the protrusion 27 is aligned with the opening position of the notch 22a. Thereby, after press-fitting of the protrusion 26, the side surface 26 a of the protrusion 26 comes into contact with the yoke portion 18 in the notch 21 a, and the tip end 26 b is disposed at a position facing the insulating paper 13. Similarly, after press-fitting of the protruding portion 27, the side surface 27a of the protruding portion 27 contacts the yoke portion 18 in the notch 22a, and the leading end portion 27b is disposed at a position facing the insulating paper 14.

  Next, the lower insulating member 16 is disposed on the lower surface side of the stator core 12, and each protrusion including the protrusions 30 and 31 is press-fitted into the stator core 12. At this time, the protrusion 30 is aligned with the opening position of the notch 21b, and the protrusion 31 is aligned with the opening position of the notch 22b. Thereby, after press-fitting of the protrusion 30, the side surface of the protrusion 30 comes into contact with the yoke portion 18 in the notch 21 b, and the tip thereof is disposed at a position facing the insulating paper 13. Similarly, after the press-fitting of the protrusion 31, the side surface of the protrusion 31 comes into contact with the yoke portion 18 in the notch 22 b, and the tip thereof is disposed at the position facing the insulating paper 14.

  Then, after the stator core 12 and the insulating papers 13 and 14 are sandwiched from above and below the stator core 12 by the upper insulating member 15 and the lower insulating member 16, the stator winding 17 is wound around the stator slot 20. .

If it is the stator 10 of the said structure, the insulating paper 13 and 14, the upper insulating member 15, and the lower insulating member 16 can be reliably hold | maintained at the stator core 12. FIG.
That is, the upper insulating member 15 and the lower insulating member 16 are firmly fixed to the stator core 12 by press-fitting each protrusion into the stator core 12. The positions of the upper insulating member 15 and the lower insulating member 16 are surely restrained by the protrusions 26, 27, 30, 31 in the lateral direction and by other protrusions including the protrusions 28 and 29 in the vertical direction. Can do.

Further, the insulating paper 13 is sandwiched between the yoke portion 18 and the projections 26 and 30 and is securely held by the stator core 12. The position of the insulating paper 13 can be reliably restrained by the inner side surface of the yoke portion 18 and the tip portions of the projections 26 and 30 in the lateral direction. Further, the positions in the vertical direction and the core thickness direction can be reliably restrained by the respective root portions of the protrusions 26 and 30.
The same applies to the insulating paper 14.

  For this reason, it is possible to reliably prevent the positions of the insulating papers 13 and 14 from being shifted during winding, causing a work defect or a poor insulation between the stator core 12 and the stator winding 17. There is no fear of occurrence. The winding of the insulating papers 13 and 14 can be avoided at the time of winding.

  Furthermore, with the stator 10 having the above-described configuration, the upper insulating member 15 and the lower insulating member 16 can be fixed to the stator core 12 without forming attachment holes on the upper surface and the lower surface of the stator core 12. For this reason, concentration of magnetic flux density does not occur, and motor efficiency can be improved.

  Note that the non-directional silicon steel sheet wound in a roll shape has a large dimensional variation of the roll width of about ± 0.2 mm with respect to the reference dimension. For this reason, when forming the magnetic steel sheet having the outer shape shown in FIG. 3, if the non-directional silicon steel sheet wound in a roll shape is pressed, the lateral width of the stator core 12 can be accurately formed. Can not. However, in the stator 10 of this configuration, since the upper resin member 15 and the lower resin member 16 are positioned (fixed) without using the lateral outer surface of the stator core 12, the upper resin member There is no particular problem in the positional accuracy of 15 and the lower resin member 16. Further, since the positional displacement of the upper resin member 15 and the lower resin member 16 with respect to the stator core 12 does not occur, there is no possibility that the slot area for winding the stator winding 17 is reduced.

DESCRIPTION OF SYMBOLS 1 Fan cover 2 Motor frame 3 Intake port 4 Exhaust port 5 Fan 6 Guide vane 7 Rectification brush device 8 Bracket 9 Shaft 10 Stator 11 Rotor 12 Stator core 13 Insulating paper (1st insulating paper)
14 Insulating paper (second insulating paper)
DESCRIPTION OF SYMBOLS 15 Upper insulating member 16 Lower insulating member 17 Stator winding 18 Relay part 19 Magnetic pole part 20 Stator slot 21a Notch (1st notch)
21b Notch (second notch)
22a Notch (third notch)
22b Notch (4th notch)
23 Body 24 Insulating wall 25 Terminal block 26 Projection (first projection)
27 Protrusion (first protrusion)
28 Projection (third projection)
29 Protrusion (third protrusion)
30 Protrusion (second protrusion)
31 Protrusion (second protrusion)
26a side surface (first side surface)
27a Side surface (second side surface)
26b, 27b Tip

Claims (3)

A stator core having a yoke part and a magnetic pole part protruding from the yoke part;
A first notch that opens on the upper surface side of the stator core and a second notch that opens on the lower surface side are formed at positions opposite to the yoke portion that are arranged along the inner surface of the stator core. With insulating paper,
An upper insulating member having a first protrusion pressed into the stator core from its upper surface side;
A lower insulating member having a second protrusion pressed into the stator core from its lower surface side;
With
The side surface of the first protrusion is pressed against the yoke portion in the first notch, and the end portion faces the insulating paper from the opposite side of the yoke portion.
The second projecting portion is an electric blower having a side surface pressed against the yoke portion within the second notch and an end portion facing the insulating paper from the opposite side of the yoke portion. A stator core having a yoke part and a pair of magnetic pole parts that protrude from the yoke part and are arranged at opposite positions;
A first notch that is disposed on one side of the magnetic pole portion along the inner surface of the stator core and that is open to the upper surface side of the stator core and a lower surface side that is opposed to the yoke portion. A first insulating paper with two notches formed;
A third notch that is disposed on the other side of the magnetic pole portion along the inner surface of the stator core and that opens to the upper surface side of the stator core and a lower surface side that is opposed to the yoke portion. A second insulating paper with four notches formed;
An upper insulating member having a pair of first protrusions press-fitted into the stator core from the upper surface side;
A lower insulating member having a pair of second protrusions press-fitted into the stator core from the lower surface side;
With
One of the first protrusions has a first side surface pressed against the yoke portion within the first notch, and an end portion facing the first insulating paper from the opposite side of the yoke portion,
The other of the first protrusions is such that the second side surface facing the opposite side of the first side surface is pressed against the yoke portion within the third notch, and the end portion is the first side from the opposite side of the yoke portion. 2 Opposite the insulating paper,
One of the second protrusions has a third side surface pressed against the yoke portion within the second notch, and an end portion facing the first insulating paper from the opposite side of the yoke portion,
The other second projecting portion has a fourth side surface facing the opposite side of the third side surface pressed against the yoke portion within the fourth notch, and an end portion from the opposite side of the yoke portion to the second side. 2 Electric blower facing the insulating paper. The upper insulating member has a pair of third protrusions press-fitted into the stator core from its upper surface side,
The lower insulating member has a pair of fourth protrusions press-fitted into the stator core from its lower surface side,
One of the third projecting portions has a fifth side surface orthogonal to the first side surface and the second side surface, and the other third projecting portion has a sixth side surface facing the fifth side surface of the stator. Pressed against the outer surface of the core,
One of the fourth protrusions has the third side surface and a seventh side surface orthogonal to the fourth side surface, and the other fourth protrusion has an eighth side surface opposite to the seventh side surface of the stator. The electric blower according to claim 2, wherein the electric blower is pressed against an outer surface of the core.

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