JP2011172445A - Armature core, armature, armature core manufacturing method, and armature manufacturing method - Google Patents

Abstract

A technique for ensuring a creeping distance between a coil and a tooth without increasing the thickness of an insulator in an armature core mounted on an axial gap type rotating electric machine.
In an armature that generates a rotating magnetic field, a plurality of teeth 2 arranged in a ring shape with a first direction A parallel to the rotation axis of the rotating magnetic field as an axis Q, and each of the plurality of teeth 2 are arranged in a first direction A. And a plurality of insulators 4A, 4B, 4C surrounded by a direction perpendicular to the first direction A. The plurality of teeth 2 are magnetically coupled on one side in the first direction A, and the first direction A of each of the insulators 4A, 4B, 4C. Of the first coil holding portions 40A, 40B, and 40C extending in the circumferential direction θ about the axis Q, and the first coil holding portions 40A, 40B, and 40C are adjacent in the circumferential direction θ. It overlaps with the other first coil holding parts 40A, 40B, 40C in the first direction A.
[Selection] Figure 5

Description

  The present invention relates to an armature core mounted on an axial gap type rotating electrical machine, an armature employing the armature core, and a manufacturing method thereof.

  In an armature of a rotating electric machine, a plurality of armature cores (teeth) are arranged in an annular shape, and an armature winding (coil) is wound around each tooth. When the coil is energized, a rotating magnetic field is generated, which contributes to torque generation in the rotor. Since the coil is normally coated with an insulating coating, it is desirable that the coil side be electrically insulated, although insulation between the conductors of the wound coil is ensured.

  In a so-called radial gap type rotating electrical machine, for example, Patent Documents 1 and 2 listed below disclose a technique in which an insulator is provided between a tooth and a coil.

JP 2008-061368 A JP 2009-247038 A

  FIG. 11 is a plan view showing the coupling between the insulators 90 according to the prior art. The teeth 92 arranged in an annular shape, the yoke 91 that magnetically couples the plurality of teeth 92, and the insulator 90 are linearly expanded. The top view at the time of assumption is shown. When the techniques disclosed in Patent Documents 1 and 2 are applied to a so-called axial gap type rotating electrical machine, end faces 94 in the annular direction (circumferential direction) of adjacent insulators 90 are in contact with each other as shown in FIG. Become. When insulation between a tooth and a coil is intended, it is desired that the creepage distance between the two is not less than a predetermined dimension, and is also defined by laws and regulations. Although it is conceivable to increase the thickness of the insulator to meet this requirement, increasing the thickness of the insulator causes an increase in the size of the armature and a decrease in the number of turns of the coil, which is not preferable from the viewpoint of cost and efficiency.

  An object of the present invention is to provide a technique for ensuring a creepage distance between a coil and a tooth without increasing the thickness of an insulator in an armature core mounted on an axial gap type rotating electric machine in view of the above problems. And

  In order to solve the above-described problem, a first aspect of the armature core according to the present invention is an armature that generates a rotating magnetic field, wherein the first direction (A) parallel to the rotation axis of the rotating magnetic field is an axis (Q). A plurality of teeth (2, 2a, 2b) arranged in an annular shape and insulators (4A, 4B, 4C, 4D, 4E, 4F, 4G, and the like) surrounding each of the plurality of teeth in a direction perpendicular to the first direction 4H, 4J, 4K), the teeth are magnetically coupled to each other on one side (-A) in the first direction, and the one side in the first direction of each insulator is It has the 1st coil press part (40A, 40B, 40C) extended in the peripheral direction (theta) centering on the axis, and the 1st coil press part is the other said 1st adjacent in the peripheral direction. In the coil holding part, the first direction Overlap represents the armature core (10, 10b).

  The 2nd aspect of the armature core which concerns on this invention is the 1st aspect, Comprising: Each of the said 1st coil holding | suppressing part (40A, 40B, 40C) adjoins at least in the said circumferential direction ((theta)). The teeth (2) extend to the center of the distance along the circumferential direction.

  The 3rd aspect of the armature core which concerns on this invention is the 1st or 2nd aspect, Comprising: One of the two said 1st coil holding | suppressing parts (40A, 40B, 40C) adjacent in the said circumferential direction The one side (+ θ) of the first coil pressing portion in the circumferential direction includes a first portion (42) having a thickness along the first direction (A) of the first thickness (T1), and the first portion (42). A second portion (44) exhibiting a second thickness (T2) smaller than the thickness, and the second portion exhibited by the one first coil pressing portion is the one exhibited by the one first coil pressing portion. A third part (-θ) extending adjacent to the one side in the circumferential direction of the first part and the other side (-θ) in the circumferential direction of the other first coil pressing part has the first thickness ( 46) and a fourth part (4) having a third thickness (T3) obtained by subtracting the second thickness from the first thickness. 8), and the fourth portion exhibited by the other first coil pressing portion extends adjacent to the other side in the circumferential direction of the first portion exhibited by the other first coil pressing portion. An end face (40T) having a component perpendicular to the circumferential direction of the second part is in contact with an end face (40U) having the component of the third part, and an end face (40V) having the component of the fourth part. ) Is in contact with the end face (40 W) having the component of the first part.

  A fourth aspect of the armature core according to the present invention is any one of the first to third aspects, and includes the insulators (4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H, 4J, 4K) The other side (+ A) of each of the first directions (A) has a second coil pressing portion (50A, 50B, 50C) extending in the circumferential direction (θ), and the second coil The pressing portion extends to the center of the distance along the circumferential direction between the teeth (2) adjacent in the circumferential direction.

  The 5th aspect of the armature core which concerns on this invention is the 4th aspect, Comprising: The said 2nd coil holding | suppressing part is said 1st to the said other 2nd coil holding | suppressing part adjacent in the said circumferential direction. Overlapping in direction.

  A sixth aspect of the armature core according to the present invention is any one of the first to fifth aspects, wherein the plurality of teeth (2) are connected to the one side in the first direction (A) ( A yoke (6, 6b) that is magnetically coupled in -A) is further provided.

  A seventh aspect of the armature core according to the present invention is any one of the first to sixth aspects, in which the plurality of teeth (2) are arranged on the one side (−) in the first direction (A). A holding member (8, 8a) to be held in A) is further provided.

  A first aspect of the armature according to the present invention includes any one of the first to seventh aspects of the armature core according to the present invention and the insulators (4A, 4B, 4C) about the first direction (A). , 4D, 4E, 4F, 4G, 4H, 4J, 4K) and a plurality of coils (12) wound around each of the coils, and the coil wound around one insulator is It is an armature (20) accommodated in the said one insulator side rather than the center of the distance along the said circumferential direction with the said other insulator which adjoins by a direction.

  A first aspect of the armature core manufacturing method according to the present invention is the manufacturing method according to any one of the third to seventh aspects of the armature core according to the present invention, wherein the second part (44) is configured as described above. The one side (-A) in the first direction (A) presents a surface located in the same plane as the one side in the first direction of the first part (42), and the fourth part (48 The other side (+ A) of the first direction of the first portion is a surface located in the same plane as the other side of the third direction of the third part (46), and the insulator is arranged in the circumferential direction. First insulator (4A, 4D) presenting the first part and the second part on both the one side (+ θ) and the other side (−θ), and the first side on the one side in the circumferential direction. A second insulator that presents a second portion and a second portion and presents the third portion and the fourth portion on the other side in the circumferential direction And the third insulator (4C, 4F) presenting the third part and the fourth part on both the one side and the other side in the circumferential direction, and the armature core Has n (n: a natural number of 3 or more) teeth (2), and one of the teeth in the circumferential direction with respect to the first unit (14A, 14D) in which the first insulator is provided in one tooth. A first step in which a second unit (14B, 14E) in which the second insulator is provided on the other teeth is disposed on the side, and after the first step, the one in the circumferential direction of the second insulator The other n−3 second units are sequentially disposed on the side of the second unit along the first direction from the other side of the first direction toward the one side of the first direction. After the second step and the second step, the first unit From the other side of the first direction along the first direction, the third unit (14C, 14F) in which the third insulator is provided on the other tooth between the first unit and the second unit. And a third step of disposing and moving toward the one side in the first direction.

  A second aspect of the armature core manufacturing method according to the present invention is the manufacturing method according to any one of the third to seventh aspects of the armature core according to the present invention, wherein the second part (44) is configured as described above. The one side (-A) in the first direction (A) is flush with the one side surface in the first direction of the first part (42), and the first part of the fourth part (48). The other side (+ A) of the direction is the same surface as the other side of the third part (46) in the first direction, and the insulator includes the one side (+ θ) and the other side in the front circumferential direction. The first insulator (4A, 4D) presenting the first part and the second part on both sides (−θ), and the third part and the second part on both the one side and the other side in the circumferential direction. A third insulator (4C, 4F) having four parts, and n (n: an even number of 4 or more) of the armature cores A first unit (14A) having the teeth (2) and having the first insulator provided on each of the (n / 2) teeth, and annularly arranged in the circumferential direction; After the first step, between the two first units adjacent in the circumferential direction, the third unit (14C) in which the third insulator is provided in each of the (n / 2) teeth, And a second step of disposing and moving along the first direction from the other side of the first direction toward the one side of the first direction.

  A third aspect of the armature core manufacturing method according to the present invention is the manufacturing method according to any one of the third to seventh aspects of the armature core according to the present invention, in which the insulator ( 4A, 4B, 4C, 4D, 4E, 4F) The unit (14A, 14B, 14C) provided is moved and arranged toward the axis on the surface having the first direction as a normal line. Is provided.

  A fourth aspect of the armature core manufacturing method according to the present invention is the manufacturing method according to any one of the third to seventh aspects of the armature core according to the present invention, wherein the second part (44) is configured as described above. The one side (-A) in the first direction (A) is flush with the one side surface in the first direction of the first part (42), and the first part of the fourth part (48). The other side (+ A) of the direction is the same surface as the other side surface of the third part (46) in the first direction, and the insulators (4B, 4E) are arranged in the circumferential direction (θ). Presenting the first part and the second part on one side (+ θ) and presenting the third part and the fourth part on the other side (−θ) in the circumferential direction, The unit (14B) provided with the insulator is moved toward the axis on the surface having the first direction as a normal line. Comprising the step of setting.

  A first aspect of the armature manufacturing method according to the present invention is the manufacturing method of the first aspect of the armature according to the present invention, wherein the second part (44) is in the first direction (A). One side (-A) presents the same surface as the one side of the first part (42) in the first direction, and the other side (+ A) of the third part (46) in the first direction. Presents the same surface as the other side surface of the first part in the first direction, and the insulator is on both the one side (+ θ) and the other side (−θ) of the circumferential direction (θ). A first insulator (4A, 4D) that presents the second part, and a second insulator that presents the second part on the one side in the circumferential direction and the third part on the other side in the circumferential direction ( 4B, 4E) and a third insulator exhibiting the third part on both the one side and the other side in the circumferential direction. (4C, 4F), the armature has n (n: a natural number of 3 or more) teeth (2), and the first insulator and the coil (12) are provided on one of the teeth. The first step of disposing the second unit (16B) provided with the second insulator and the coil on the other tooth on one side in the circumferential direction with respect to the first unit (16A) provided with And after the first step, another n-3 second units on the one side in the circumferential direction of the second unit from the other side in the first direction along the first direction. A second step of sequentially moving the first direction toward the one side in the first direction; and after the second step, between the first unit and the second unit, the other teeth 3 insulator and a third coil provided with the coil And a third step of disposing is moved toward knit (16C) from the other side of the in the first direction a first direction to the one side of the first direction.

  In an axial gap type motor, when an armature core is formed by combining a plurality of teeth and a coil is provided for each tooth, it is necessary to provide insulation for each tooth. For example, it is possible to insulate each tooth by increasing the thickness of the insulator. However, increasing the thickness of the insulator causes an increase in the size of the armature and a decrease in the number of turns of the coil, which is not preferable from the viewpoint of cost and efficiency. According to the first aspect of the armature core of the present invention, the creeping distance between the coil and the magnetic coupling portion of the teeth can be ensured without increasing the thickness of the insulator. Increasing the insulator thickness to secure the creepage distance reduces the coil cross-sectional area and increases copper loss, but according to this aspect, the coil cross-sectional area is maintained and copper loss does not increase. .

  According to the second aspect of the armature core of the present invention, the coil can be wound evenly regardless of the teeth.

  According to the third aspect of the armature core according to the present invention, the creepage distance can be secured. In addition, coil collapse can be prevented when an armature is obtained by providing a coil. Moreover, the rattling of the circumferential direction between teeth can be avoided or suppressed.

  According to the fourth aspect of the armature core according to the present invention, the coil can be wound evenly, and collapse can be prevented.

  According to the 5th aspect of the armature core which concerns on this invention, insulators can be arrange | positioned without a clearance gap in the circumferential direction. It can be wound evenly.

  According to the sixth aspect of the armature core of the present invention, the magnetic coupling between the teeth can be strengthened.

  According to the seventh aspect of the armature core according to the present invention, the strength of the armature core can be increased.

  According to the first aspect of the armature according to the present invention, the armature can be formed by combining the teeth, the insulator, and the coil as one unit and combining them. Moreover, adjacent coils in the circumferential direction do not interfere with each other.

  According to the first aspect of the armature core manufacturing method of the present invention, the armature core can be easily assembled without causing the second part and the third part to interfere with each other.

  According to the second aspect of the method of manufacturing the armature core according to the present invention, the armature core can be easily assembled without causing the second part and the third part to interfere with each other.

  According to the third aspect of the armature core manufacturing method of the present invention, the armature core can be easily assembled without causing the second part and the third part to interfere with each other.

  According to the third aspect of the armature core manufacturing method of the present invention, the armature core can be easily assembled without causing the second part and the third part to interfere with each other. And since it can be comprised with the insulator of a single structure, manufacturing cost can be suppressed.

  According to the first aspect of the armature manufacturing method of the present invention, the armature can be easily assembled without causing the second part and the third part to interfere with each other and without causing the coils to interfere with each other. .

It is a perspective view of the armature core which concerns on Example 1 of this invention. It is a perspective view of teeth provided with the 1st insulator. It is a perspective view of teeth provided with the 2nd insulator. It is a perspective view of teeth provided with the 3rd insulator. It is a top view which shows the combination of the teeth which provided the 1st-3rd insulator. It is a top view which shows the combination of the teeth which provided the 1st, 3rd insulator. It is a top view which shows the combination of the teeth which provided the 4th-6th insulator. It is a top view in case an armature core has a reinforcement board. It is a top view which shows the coupling | bonding of the insulators which concern on a modification. It is a perspective view of the armature core which concerns on Example 2 of this invention. It is a top view which shows the coupling | bonding of the insulators which concern on a prior art.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following drawings including FIG. 1, only elements related to the present invention are shown.

<Example 1>
<Outline of device configuration>
As shown in FIG. 1, the armature core 10 according to the first embodiment of the present invention is applied to the armature 20 of an axial gap type rotating electrical machine 60. The axial gap type rotating electric machine 60 corresponds to the direction A in which the field element 30 as the rotor and the armature 20 as the stator are parallel to the rotation axis Q (the “first direction A” in the means for solving the problem) Hereinafter, they face each other through a predetermined gap along the “height direction A”. The field element 30 includes a field magnet 32 and a yoke 34 that magnetically couples the field magnets 32 on the side opposite to the armature 20.

  The armature 20 is wound around each of the teeth 2 via the plurality of teeth 2 that are annularly arranged around the rotation axis Q, the insulator 4 that surrounds each of the teeth 2 in a direction perpendicular to the height direction A, and the insulator 4. A coil 12 to be rotated, a yoke 6 that magnetically couples the plurality of teeth 2 at one side -A in the height direction A, and a holding member 8 that holds the plurality of teeth 2 at one side in the height direction A. And have. Here, the holding member 8 mechanically holds the teeth 2. On the other hand, the teeth 2 and the yoke 6 are magnetically coupled, and the yoke 6 does not necessarily need to mechanically hold the teeth 2. Therefore, the yoke 6 and the holding member 8 can be formed of a material in consideration of the functions to be secured by the magnetic coupling and the mechanical coupling as long as they are fixed to each other. Specifically, the yoke 6 is formed of a dust core (see FIG. 1), or is mainly formed of electromagnetic steel plates (not shown) stacked along the height direction A. Moreover, a metal lump can be mentioned as a material of the holding member 8.

  In the first embodiment, as the axial gap type rotating electrical machine 60, a mode in which the rotor (field element 30) and the stator (armature 20) face each other is illustrated, but the configuration of the rotating electrical machine is arbitrary. is there. For example, the aspect which arrange | positions the two armatures 20 which exhibit the same structure along the height direction A so that the teeth 2 and the coil 12 may mutually oppose, and arrange | positions a field element between both may be sufficient. . At this time, the field element 30 is preferably provided with a nonmagnetic material for holding the field magnet 32 instead of the yoke 34 of FIG.

  In order to facilitate understanding of the structure, the axial gap type rotating electrical machine 60 is shown exploded along the rotation axis Q, but in reality, the field magnet 32 and the yoke 34 are in contact with each other. Further, in FIG. 1, in order to facilitate understanding of the structure, a portion where only one tooth 2 is embedded in the yoke 6 and the holding member 8 is indicated by a broken line.

  Furthermore, FIG. 1 shows only one of the insulator 4 and the coil 12 provided in each of the teeth 2. Here, unless otherwise specified in the present application, the coil 12 does not indicate one of the conductive wires constituting the coil 12, but indicates a mode in which the conductive wires are wound together. The same applies to the drawings. Moreover, the winding method of the coil 12 is arbitrary, such as a spindle winding which rotates and rotates a workpiece | work, and a nozzle winding which winds around the fixed workpiece | work by rotating a nozzle. Furthermore, it is preferable to use a self-bonding wire that fixes the conductive wires while winding the conductive wires constituting the coil 12 by heating after winding. Moreover, you may mold with resin after winding the said conducting wire.

  The tooth 2 includes a plurality of magnetic flat plates 21 stacked along a radial direction R centering on the rotation axis Q on a surface having the height direction A as a normal line. In FIG. 1, the radial direction R for only one tooth 2 is shown. Teeth 2 presents winding part 22a, embedding part 22b, and brim 22c. The winding part 22 a extends along the height direction A and functions as a core around which the coil 12 is wound via the insulator 4. Here, the case where the extending direction of the winding part 22a is parallel to the height direction A and the winding axis of the coil 12 is parallel to the height direction A is illustrated. The embedded portion 22b is embedded in the yoke 6 and the holding member 8 on one side in the height direction A of the winding portion 22a. The brim portion 22c projects to the outside of the winding portion 22a on the other side in the height direction A of the winding portion 22a (the + A direction side in the drawing). Here, the flange portion 22c protrudes only in the circumferential direction θ with respect to the winding portion 22a, and the tooth 2 has a structure that is easily formed of laminated steel plates along the radial direction R.

  The winding portion 22a has a width dimension which is a dimension in a width direction T (see FIG. 2) perpendicular to both the height direction A and the radial direction R, and the radial direction in which a plurality of magnetic plates 21 are stacked. One side of R increases. As a specific example, when a plurality of teeth 2 are annularly arranged around the rotation axis Q as shown in FIG. 1, the width dimension of the plurality of magnetic plates 21 of one tooth 2 is in the radial direction R. Increasing on the outside. More specifically, the width dimension of each portion of the plurality of magnetic flat plates 21 corresponding to the winding portion 22a exhibits the width W1 on the outermost side in the radial direction R and the width W2 on the innermost side in the radial direction R. And satisfies the relationship W1> W2. In other words, the winding portion 22a generally has a substantially isosceles trapezoidal shape that extends outward in the radial direction R around the rotation axis Q in a plan view from the height direction A (hereinafter simply referred to as “plan view”). . In consideration of the ease of winding of the coil 12, the outermost width W1 in the radial direction R may not be the maximum value of the width dimension.

  The embedded portion 22b has, for example, a columnar shape having a substantially isosceles trapezoidal shape that is the same shape as the wound portion 22a in a plan view on one side in the height direction A of the wound portion 22a, and the yoke 6 and the holding member 8. It is embedded in the recess that is present. The flange portion 22c extends on both sides in the width direction T on the opposite side of the winding portion 22a from the embedded portion 22b. Further, in order to make the gap (so-called air gap) between the flange portion 22c and the field element 10 constant, the surface of the flange portion 22c facing the field element 10 is substantially perpendicular to the height direction A.

  Although not shown in detail in FIG. 1, any of the first to third insulators 4A, 4B, 4C shown in FIG. 2-4 is attached to each of the teeth 2 (in FIG. 1, these are shown in FIG. 1). The first to third insulators 4A, 4B, and 4C are represented as insulators 4). Hereinafter, a structure common to each of the first to third insulators 4A, 4B, and 4C will be described, and then a structure unique to each of the first to third insulators 4A, 4B, and 4C will be described.

  First, each of the first to third insulators 4A, 4B, and 4C surrounds one tooth 2 in a direction perpendicular to the height direction A, and particularly surrounds the winding portion 22a in a direction perpendicular to the height direction A. A portion surrounding the winding portion 22 a of the tooth 2 in a direction perpendicular to the height direction A is referred to as an insulator winding portion 410. Also, each of the first to third insulators 4A, 4B, and 4C presses the coil 12 in the height direction A and covers the coil 12A in the height direction A. The parts that hold the coil 12 on one side -A in the height direction A are first coil holding parts 40A, 40B, and 40C, and the parts that are pressed and covered on the other side + A in the height direction A are the second coil holding parts 50A, 50B and 50C. If both the first coil pressing portions 40A, 40B, and 40C and the second coil pressing portions 50A, 50B, and 50C hold the coil 12 in the height direction A, the coil 12 can be prevented from being collapsed. Note that covering the coil 12 in the height direction A means that the coil 12 is in the first and first directions both in plan view from one side −A in the height direction A and in plan view from the other side + A in the height direction A. This means that the two-coil holding portions 40A, 40B, 40C, 50A, 50B, and 50C do not protrude from the outline.

  Further, for example, each of the first coil pressing portions 40A, 40B, and 40C is provided with grooves 41a and 41b that hold the wire ends that are the winding start and winding end portions of the conductive wire constituting the coil 12. The reason why the first coil pressing portions 40A, 40B, and 40C exhibit the grooves 41a and 41b is to make these wire ends difficult to contact the rotor 30. Moreover, by introducing the winding start of the conducting wire from the groove 41b, the winding starting conducting wire is not hindered from being wound around the aligned winding.

  Further, each of the first coil holding portions 40A, 40B, 40C is substantially circumferentially along a circumferential direction θ centered on the rotation axis Q from one side-A end portion in the height direction A of the insulator winding portion 410. It extends at least to the center of the distance along the circumferential direction θ between the teeth 2 adjacent in the direction θ. The first coil pressing portions 40A, 40B, 40C adjacent in the circumferential direction θ overlap in the height direction A, and the first coil pressing portions 40A, 40B, 40C adjacent in the circumferential direction θ are in the circumferential direction θ. The end faces of each other come into contact with each other.

  Further, each of the second coil pressing portions 50A, 50B, 50C is arranged in a circumferential direction substantially along a circumferential direction θ centered on the rotation axis Q from the other side + A end portion in the height direction A of the insulator winding portion 410. It extends at least to the center of the distance along the circumferential direction θ between adjacent teeth 2 at θ. Then, the end faces in the circumferential direction θ are in contact with the second coil pressing portions 50A, 50B, 50C adjacent in the circumferential direction θ.

  Each of the first to third insulators 4A, 4B, 4C having the above-described common structure has the following unique structure. In this specification, for convenience, the name of each part is given with one side −A in the height direction A being downward, the other side + A being upward, and the direction perpendicular to these as the side. It does not constrain the vertical relationship in actual use.

<First insulator 4A>
As shown in FIG. 2, in the first insulator 4A, the first coil pressing portion 40A has the following structure. In other words, the first coil holding portion 40A is in relation to the first portion 42 and the first portion 42 on both the one side + θ and the other side −θ in the circumferential direction θ of the tooth 2 to which the first insulator 4A is attached. The second portion 44 is presented on the side far from the tooth 2 in the circumferential direction θ.

  The first portion 42 has a first thickness T1 having a thickness in the height direction A, and is determined in advance along the circumferential direction θ from the one side -A end portion in the height direction A of the insulator winding portion 410. Extends by length L1. Here, for example, when the armature core 10 is formed, the first length L1 is the end of the first portion 42 in the circumferential direction θ at the center of the distance along the circumferential direction θ between adjacent teeth 2 in plan view. It is equal to the length until the part is located. 40 U of 1st part (end surface in the means for solving a problem) which is the edge part of the circumferential direction (theta) of the 1st part 42 exhibits a surface parallel to the height direction A, for example. If the first part side surface 40U extends along the center of the distance along the circumferential direction θ between adjacent teeth 2 in a plan view, the first insulator 4A is attached to one tooth 2, The coil 12 can be wound without incurring a collapse to the one side -A in the height direction A. Moreover, if the coil 12 can be wound to the vicinity of the said center, it will contribute to the improvement of the space factor of the coil 12.

  The second portion 44 exhibits a second thickness T2 that is smaller than the first thickness T1.

  In the first embodiment, the first portion 42 and the second portion 44 present the first coil pressing portion lower surface 43S that is the same plane on one side -A in the height direction A. On the other side + A in the height direction A of the first coil pressing portion 40A, the first portion 42 exhibits the first portion upper surface 42S having the height direction A as a normal line, and the second portion 44 is in the height direction A. The second part upper surface 44S is presented with reference to the normal line. The second part upper surface 44S is located on one side -A in the height direction A with respect to the first part upper surface 42S. And between the 1st part upper surface 42S and the 2nd part upper surface 44S of the 2nd part 44 connected to the said 1st part 42, the 1st part side surface 40U parallel to the height direction A is exhibited. That is, the first part 42 and the second part 44 exhibit a vertical step in a cross-sectional view as viewed from the radial direction R (hereinafter simply referred to as “cross-sectional view”).

  The second portion 44 extends from the first portion side surface 40U by a predetermined second length L2 in the circumferential direction θ, and the end portion in the circumferential direction θ is parallel to the height direction A. (End face in means for solving the problem) 40T is exhibited. The first part side surface 40U and the second part side surface 40T extend substantially along the radial direction R. However, as shown in FIGS. 1 and 2, the first insulator 4 </ b> A is provided at both ends of the first portion side surface 40 </ b> U and the second portion side surface 40 </ b> T in both radial directions R (inner diameter side and outer diameter side). It may be curved toward the teeth 2 side. Specifically, the length along the width direction T of the first insulator 4A gradually decreases at both ends in the radial direction R of the first side surface 40U and the second side surface 40T in plan view. It may be curved.

  As described above, since the first insulator 4A covers the coil 12 in the height direction A, the first portion 42 and the second portion 44 are not only both in the circumferential direction θ of the teeth 2 but also in both the radial directions R. Extend a predetermined length. The length of the first part 42 and the second part 44 extending in both the radial directions R is preferably equal to the length of the first part 42 extending along the circumferential direction θ. This is because the enlargement of the armature core 10 can be avoided or suppressed while the coil 12 is covered with the one side -A in the height direction A in both the radial directions R.

  Further, in the first insulator 4A, the second coil pressing portion 50A has the following structure. That is, the second coil pressing portion 50A is on the other side in the height direction A of the insulator winding portion 410 on both the one side + θ and the other side −θ in the circumferential direction θ of the tooth 2 to which the first insulator 4A is attached. A fifth portion 51a extending along the circumferential direction θ from the + A end portion, and a sixth portion 51b on the side far from the tooth 2 in the circumferential direction θ with respect to the fifth portion 51a. The fifth portion 51a has a first thickness T1 having a thickness in the height direction A, and is a fourth length predetermined in the circumferential direction θ from the other side + A end in the height direction A of the insulator winding portion 410. It extends by a length L4 (in FIG. 2, the other side + A end in the height direction A of the insulator winding portion 410 is indicated by a broken line). The fifth portion side surface 53U, which is the end portion in the circumferential direction θ of the fifth portion 51a, exhibits a surface parallel to the height direction A, for example.

  The sixth portion 51b extends from the fifth portion side surface 53U by a predetermined fifth length L5 along the circumferential direction θ, and an end portion in the circumferential direction θ is a sixth portion parallel to the height direction A. Presents side surface 53T. Here, the length that the fifth portion 51a and the sixth portion 51b extend from the insulator winding portion 410 along the circumferential direction θ, that is, the length L4 + L5 that is the sum of the fourth length L4 and the fifth length L5. Is preferably equal to the first length L1 of the first portion 42 extending along the circumferential direction θ. That is, it is desirable that the first part 42 overlaps the fifth part 51a and the sixth part 51b in plan view. This is because the coil 12 can be wound without causing a collapse to the other side + A in the height direction A in a state where the first insulator 4A is attached to one tooth 2.

  The 5th part 51a and the 6th part 51b present the 2nd coil holding | suppressing part lower surface 51S which is one side -A of each height direction A, and is the same plane. On the other side + A in the height direction A of the second coil pressing portion 50A, the fifth portion a exhibits the fifth portion upper surface 53S with the height direction A as a normal line, and the seventh portion 51b has the height direction A. A seventh part upper surface 55S having a normal line as a normal line is presented. A fifth portion side surface 53U parallel to the height direction A is present between the fifth portion upper surface 53S and the seventh portion upper surface 55S of the seventh portion 51b connected to the fifth portion 51a. That is, the fifth part 51a and the seventh part 51b exhibit a vertical step in a sectional view. Moreover, the edge part of the circumferential direction (theta) of the 7th part 51b exhibits the 7th part side surface 53T parallel to the height direction A. As shown in FIG. The fifth portion side surface 53U and the seventh portion side surface 53T extend substantially along the radial direction R. However, as shown in FIGS. 1 and 2, the fifth portion side surface 53U and the seventh portion side surface 53T are both curved toward the teeth 2 side where the first insulator 4A is provided at both ends in the radial direction R. May be. Specifically, the length along the width direction T of the first insulator 4A is gradually reduced at both ends in the radial direction R of the fifth portion side surface 53U and the seventh portion side surface 53T in plan view. It may be curved.

  As described above, since the first insulator 4A covers the coil 12 in the height direction A, the fifth portion 51a and the seventh portion 51b are not only both in the circumferential direction θ of the teeth 2 but also in both the radial directions R. Extend a predetermined length. The length of the fifth part 51a and the seventh part 51b extending in both the radial directions R is preferably equal to the first length L1 of the fifth part 51a extending along the circumferential direction θ. This is because an increase in size of the armature core 10 can be avoided or suppressed while the coil 12 is covered with the other side + A in the height direction A in both the radial directions R.

  Thus, if the first coil pressing portion 40A exhibits a step in a cross-sectional view, the creepage distance that has conventionally been ensured only by the thickness along the height direction A of the insulator is along the height direction A of the insulator. Without increasing the thickness, the step is extended by the length that extends along the circumferential direction θ, that is, the length that the second upper surface 44S extends along the circumferential direction θ. Under the restriction that the size in the height direction A of the insulator is not increased so as to avoid an increase in the size of the armature core 10, if the thickness of the insulator is increased to ensure the creepage distance, the cross-sectional area of the coil 12 is relatively It becomes smaller and copper loss increases. However, according to this aspect, the cross-sectional area of the coil 12 is maintained while ensuring the creepage distance, and the copper loss is not increased.

<Second insulator 4B>
As shown in FIG. 3, in the second insulator 4B, the first coil pressing portion 40B has the following structure. That is, the first coil pressing portion 40B exhibits the first portion 42 and the second portion 44 at one side + θ in the circumferential direction θ of the tooth 2 to which the second insulator 4B is attached. The second insulator 4B includes a third portion 46 on the other side −θ in the circumferential direction θ of the tooth 2, and a fourth portion 48 on the side farther from the tooth 2 in the circumferential direction θ than the third portion 46. Presents. That is, the one side + θ in the circumferential direction θ of the first coil pressing portion 40B has the same structure as the one side + θ in the circumferential direction θ of the first coil pressing portion 40A of the first insulator 4A.

  The third portion 46 has a first thickness T1 in the height direction A, and extends from the insulator winding portion 410 by the third length L3 along the circumferential direction θ. The third length L3 is preferably equal to a length obtained by subtracting the second length L2 from the first length L1. The fourth portion 48 exhibits a third thickness T3 in which the thickness in the height direction A is the first thickness T1 minus the second thickness T2. However, for each dimension, variation in insulator molding, a gap between fittings, and the like are taken into consideration. The other side -θ end of the fourth portion 48 in the circumferential direction θ is located at a distance of the first length L1 from the insulator winding portion 410 along the circumferential direction θ. That is, when the armature core 10 is formed, the fourth portion side surface (end surface in the means for solving the problem) 40V that is the end portion of the fourth portion 48 in the circumferential direction θ is adjacent to each other in the plan view. Is located at the center of the distance along the circumferential direction θ. Therefore, the distance from the tooth 2 to which the second insulator 4B is attached to the first portion side surface 40U of the first portion 42 extending in one side + θ in the circumferential direction θ, and the other side −θ in the circumferential direction θ from the tooth 2. The distance from the fourth portion 48 extending to the fourth portion side surface 40V is equal to each other.

  The fourth part side surface 40V presents a surface parallel to the height direction A, for example.

  In the other side −θ in the circumferential direction θ, the third portion 46 and the fourth portion 48 are the other side + A in the height direction A and the first coil pressing portion upper surface 42T that is flush with the first portion upper surface 42S. Presents. Further, on one side -A in the height direction A of the first coil pressing portion 40B, the third portion 46 exhibits the third portion lower surface 46U that is flush with the first coil pressing portion lower surface 43S, and the fourth portion 48 is the second one. The fourth portion lower surface 48S is in contact with the second portion upper surface 44S without a gap. And between the 3rd part lower surface 46U and the 4th part lower surface 48S, the 3rd part side surface 40U parallel to the height direction A is exhibited. That is, the third part 46 and the fourth part 48 exhibit a vertical step in a sectional view.

  Further, the fourth portion 48 extends from the third portion side surface 40U by the second length L2 in the circumferential direction θ, and the end portion in the circumferential direction θ exhibits a fourth portion side surface 40V parallel to the height direction A. The fourth portion side surface 40V extends substantially along the radial direction R. However, as shown in FIGS. 1 and 3, the fourth portion side surface 40V is curved toward the teeth 2 side where the second insulator 4B is provided at both ends in the radial direction R (inner diameter side and outer diameter side). May be. Specifically, the length along the width direction T of the second insulator 4B gradually decreases at both ends in the radial direction R of the third portion side surface 40U and the fourth portion side surface 40V in plan view. It may be curved.

  As described above, since the second insulator 4B covers the coil 12 in the height direction A, the third portion 46 can be applied not only to the other side -θ in the circumferential direction θ of the tooth 2 but also to both the radial direction R. The first portion 42 and the second portion 44 extend the same length. The length of the third portion 46 extending in both the radial directions R is equal to the length of the first portion 42 extending in the circumferential direction θ (that is, the second portion 44 extends in both the radial directions R). It is desirable to be equal to the existing length). This is because an increase in size of the armature core 10 can be avoided or suppressed while the coil 12 is covered with the one side -A in the height direction A. Further, when the armature core 10 is formed in combination with the first insulator 4A, the size of the armature core 10 in the radial direction R can be made uniform regardless of the circumferential direction θ.

  In the second insulator 4B, the second coil pressing portion 50B has the following structure. That is, the second coil pressing portion 50B presents the fifth portion 51a and the sixth portion 51b at one side + θ in the circumferential direction θ of the tooth 2 to which the second insulator 4B is attached. In addition, the second coil pressing portion 50B includes a seventh portion 51c on the other side −θ in the circumferential direction θ of the tooth 2 and an eighth portion on the side farther away from the tooth 2 in the circumferential direction θ than the seventh portion 51c. 51d. That is, the one side + θ in the circumferential direction θ of the second coil pressing portion 50B has the same structure as the one side + θ in the circumferential direction θ of the second coil pressing portion 50A of the first insulator 4A.

  The seventh portion 51c has a first thickness T1 in the height direction A, and extends by the first length L1 along the circumferential direction θ from the other side + A end in the height direction A of the insulator winding portion 410. To do. The seventh portion side surface 53U, which is the end portion of the seventh portion 51c in the circumferential direction θ, exhibits a surface parallel to the height direction A, for example.

  The 7th part 51c and the 8th part 51d exhibit the 2nd coil presser part upper surface 51T which is the other side + A of each height direction A, and is the same plane. Further, on one side -A in the height direction A, the seventh portion 51c exhibits a seventh portion lower surface 53T having the height direction A as a normal line, and the eighth portion 51d has a first direction having the height direction A as a normal line. An 8 part lower surface 55T is presented. And between the 7th part lower surface 53T and the 8th part lower surface 55T, the 7th part side surface 53U is exhibited. That is, the seventh part 51c and the eighth part 51d exhibit a vertical step in a sectional view. Further, the end portion of the eighth portion 51d in the circumferential direction θ exhibits an eighth portion side surface 53V having the circumferential direction θ as a normal line. The eighth portion side surface 53V extends substantially along the radial direction R. However, as shown in FIGS. 1 and 3, the eighth portion side surface 53V is curved toward the teeth 2 side where the second insulator 4B is provided at both ends in the radial direction R (inner diameter side and outer diameter side). May be. Specifically, the length along the width direction T of the second insulator 4B gradually decreases at both ends in the radial direction R of the seventh portion side surface 53U and the eighth portion side surface 53V in plan view. It may be curved.

  As described above, since the second insulator 4B covers the coil 12 in the height direction A, the seventh portion 51c and the eighth portion 51d are not only the other side -θ of the circumferential direction θ of the tooth 2 but also in the radial direction. It is desirable to extend at least the first length L1 to both of R. This is because an increase in size of the armature core 10 can be avoided or suppressed while the coil 12 is covered with the other side + A in the height direction A in both the radial directions R. Further, when the armature core 10 is formed in combination with the first insulator 4A, the size of the armature core 10 in the radial direction R can be made uniform regardless of the circumferential direction θ.

  Thus, if the first coil pressing portion 40B has a step in a sectional view, the creeping distance that can be ensured only for the thickness along the height direction A of the insulator is along the height direction A of the insulator. Without increasing the thickness, the step is extended by the length that extends along the circumferential direction θ, that is, the length that the third portion lower surface 46S extends along the circumferential direction θ.

<Third insulator 4C>
As shown in FIG. 4, in the third insulator 4C, the first coil pressing portion 40C has the following structure. That is, the first coil pressing portion 40C exhibits the third portion 46 and the fourth portion 48 on both the one side + θ and the other side −θ in the circumferential direction θ of the tooth 2 to which the third insulator 4C is attached. That is, the same structure as the other side -θ in the circumferential direction θ of the first coil pressing portion 40B of the second insulator 4B is exhibited in both the circumferential direction θ of the first coil pressing portion 40C.

  Further, in the third insulator 4C, the second coil pressing portion 50C has the following structure. In other words, the second coil pressing portion 50C presents the seventh portion 51c and the eighth portion 51d in both the circumferential directions θ of the teeth 2 to which the third insulator 4C is attached. That is, the same structure as the other side -θ in the circumferential direction θ of the second coil pressing portion 50B of the second insulator 4B is exhibited in both the circumferential direction θ of the second coil pressing portion 50C.

  Any of the first to third insulators 4A, 4B, 4C are adjacent to each other when the armature core 10 is formed in the first coil pressing portions 40A, 40B, 40C and the second coil pressing portions 50A, 50B, 50C. The same surface 42S, 42T, 51S, 53T is exhibited to the center of the distance along the circumferential direction θ between the teeth 2. Therefore, the coil 12 can be evenly wound around any of the first to third insulators 4A, 4B, 4C.

<Arrangement between adjacent insulators>
In the armature core 10 according to the present invention, each of the first to third insulators 4A, 4B, 4C has a height direction A to any one of the first to third insulators 4A, 4B, 4C adjacent in the circumferential direction θ. Overlap. Specifically, as shown in FIG. 5, the second portion 44 and the fourth portion 48 overlap in the height direction A, and the sixth portion 51b and the eighth portion 51d overlap in the height direction A. And 2nd part side surface 40T and 3rd part side surface 40U contact | connect. In addition, the fourth portion side surface 40V and the first portion side surface 40U are in contact with each other. In this way, if the insulators 4A, 4B, 4C adjacent in the circumferential direction θ are in contact with each other, the rattling of the teeth 2 in the circumferential direction θ can be avoided or suppressed.

  A more specific arrangement of the adjacent first to third insulators 4A, 4B, 4C will be described together with a method for manufacturing the armature core 10 having n teeth 2 (where n is a natural number of 3 or more). . 5 (a) and 5 (b) are virtual views of the armature core 10 observed from the outside in the radial direction R toward the inside on the surface having the height direction A as a normal line. Yes. FIG. 5A schematically shows an assembly process of the armature core 10, and FIG. 5B schematically shows the assembled armature core 10. 5 (a) and 5 (b) indicates the center of the distance along the circumferential direction θ between the teeth 2 adjacent in the circumferential direction θ.

<Manufacturing Method of Armature Core 10-Part 1>
First, in the first unit 14 </ b> A in which the first insulator 4 </ b> A is attached to one tooth 2 and the coil 12 is wound, the embedded portion 22 b exhibited by the tooth 2 is embedded in the yoke 6 and the holding member 8. Next, on the one side + θ in the circumferential direction θ with respect to the first unit 14A, a second unit 14B in which the second insulator 4B is attached to the other tooth 2 and the coil 12 is wound is disposed (first step). .

  The n-3 second units 14B are arranged along the height direction A on the opposite side (one side + θ in the circumferential direction θ) to the first unit 14A with respect to the second unit 14B disposed in the first step. Then, they are moved from the other side + A in the height direction A toward the one side -A in the height direction A, and are sequentially arranged so as to form an annular shape in a plan view (second step). In FIG. 5, n-3 second units 14B are representatively shown as second units 14B broken by broken lines. However, when n = 3, the broken second unit 14B is omitted, and the second unit 14B disposed in the first step is grasped as the second unit 14B disposed in the second step. Is done.

  After the second step, the n-3th second unit 14B and the first unit 14A disposed at the beginning of the first step (in FIG. 5, the first unit shown at the left end for ease of understanding). The third unit 14C in which the third insulator 4C is attached to the other tooth 2 and the coil 12 is wound around the height direction A is also shown between the unit 14A and the same unit 14A. It is arranged to move from the other side + A in the length direction A toward the one side −A in the height direction A.

  Thus, when the armature core 10 is manufactured by combining the first to third insulators 4A, 4B, and 4C, the number of turns of the coil is not reduced even if the creeping distance is extended. Moreover, the edge part of the circumferential direction (theta) of the 4th part 48 which the 2nd unit 14B exhibits is located in the center vicinity of the distance along the circumferential direction (theta) of adjacent teeth 2, and the coil 12 is wound to the said center vicinity. Is done. Therefore, the 6th part 51b which 1st unit 14A exhibits, and / or coil 12 which 1st unit 14A has, and coil 12 which 2nd unit 14B has can interfere with 2nd unit 14B. For example, in the case of a three-phase winding, it is preferable in the manufacturing process that each of the first to third units 14A, 14B, and 14C corresponds to each phase forming the three-phase winding.

<Manufacturing Method of Armature Core-Part 2>
When the armature core has an even number of teeth (however, 4 or more), it can also be manufactured as follows. That is, as shown in FIG. 6, the first unit 14A having the first insulator 4A and the third unit 14C having the third insulator 4C can be manufactured. 6 (a) and 6 (b) virtually show diagrams when the armature core is observed from the outer side to the inner side in the radial direction R on the surface having the height direction A as a normal line. . FIG. 6A schematically shows an assembly process of the armature core, and FIG. 6B schematically shows the assembled armature core. 6A and 6B indicate the center of the distance along the circumferential direction θ between the teeth 2 adjacent in the circumferential direction θ, as in FIG. 5.

  Specifically, when the number of teeth 2 is an even number of 4 or more, first, first units 14A each having first insulators 4A attached to half of the total number of teeth 2 constituting the armature core are arranged in a substantially annular shape. (First step; FIG. 6A).

  Between the first units 14A arranged in the first step, the third units 14C each having the third insulator 4C attached to the remaining half of the teeth 2 are arranged in the height direction A along the height direction A. It moves and arrange | positions toward the one side -A of the height direction A from the other side + A (2nd process; refer FIG.6 (b)).

<Modification of the second coil holding part>
In the first embodiment, the second coil pressing portions 50A, 50B, and 50C are shown to have steps (fifth portion 51a and sixth portion 51b, seventh portion 51c and eighth portion 51d) in cross-sectional view. However, as shown in FIG. 7, the first to third insulators 4D, 4E, and the second insulators 4D, 4E, which have the second coil pressing portion 40G that has a rectangular cross-sectional view in both the circumferential directions θ, as shown in FIG. 4F may be adopted to form the armature core. This is because, for example, the creepage distance from the coil 12 to the brim portion 22c of the tooth 2 can be extended by shortening the width of the brim portion 22c in the circumferential direction θ. In addition, the insulation between the rotor field element 30 and the coil 12 can be secured by the thickness (creeping distance) along the height direction A of the flange portion 22c and the length of the air gap (spatial distance). is there. However, it is desirable that the second coil pressing portion 50D extends to the center of the distance along the circumferential direction θ between adjacent teeth 2 in the circumferential direction θ and covers the coil 12 in the height direction A.

<Modification of embedded portion 22b>
In the first embodiment, the teeth 2 are magnetically coupled to each other via the yoke 6, but the yoke 6 is not necessarily provided. As shown in FIG. The armature core may be formed by adopting the tooth 2a having the embedded portion 23b in which the portion corresponding to 22b is widened to the center of the distance along the circumferential direction θ between the teeth 2 in both circumferential directions θ. . However, it is desirable to hold a plurality of teeth 2a with a holding member 8a corresponding to the holding member 8 described above. In addition, if the teeth 2a are divided | segmented mutually, you may have the structure corresponded to the yoke 6 (refer FIGS. 5-7).

<Modification of the first coil holding part>
In the first embodiment, each of the first portion side surface 40U, the second portion side surface 40T, and the third portion side surface 40V exhibits a surface parallel to the height direction A, and the second portion upper surface 44S and the third portion lower surface 46S are respectively formed. The aspect which exhibits the surface which makes the height direction A a normal line was shown. That is, although the angle which the level | step difference which the 1st coil holding | suppressing part 40A, 40B, 40C makes has shown the right angle was shown, the angle which the level | step difference makes does not necessarily need to show the right angle.

  For example, as shown in FIG. 9A, the first portion 42a and the second portion 44a of the first insulator 4H have a single bowl shape in a cross-sectional view, and the first insulator 4H has the other side -θ in the circumferential direction θ. The third portion 46a and the fourth portion 48a of the adjacent second insulator 4G may have another hook shape that fits into the one hook shape in a cross-sectional view. 9A to 9D show a region corresponding to a part of the region shown in FIG. With the shape shown in FIG. 9A, the length of the second part 44a and the fourth part 48a extending along the circumferential direction θ is the length of the second part 44 and the fourth part 48 of FIG. Even if the length is the same as the length extending along the circumferential direction θ, the creepage distance between the coil 12 and the tooth 2 can be extended. Moreover, it is possible to avoid or suppress the first and second insulators 4H and 4G from shifting in the circumferential direction θ.

  For example, as shown in FIG. 9B, the first insulator 4K has a first part 42b and a second part 44b, and is adjacent to the first insulator 4K on the other side -θ in the circumferential direction θ. 4J may present the third part 46b and the fourth part 48b. The second portion 44b has a right triangle shape in cross-sectional view, and one side that is not the hypotenuse of the right triangle corresponds to the height of the first portion 42b. The fourth portion 48b has a right triangle shape in a direction to form a rectangle by fitting with the right triangle shape in a sectional view. That is, the hypotenuse 42Z of the right triangle presented by the second portion 44b and the hypotenuse 42Y of the right triangle presented by the fourth portion 48b overlap in the height direction A.

  Further, for example, as shown in FIG. 9C, each of the first insulator 4M and the second insulator 4L is fitted in a plane that is not parallel to the height direction A and not parallel to the circumferential direction θ. A step may be exhibited. Also in this case, the non-parallel surface has a component perpendicular to the circumferential direction θ. Furthermore, as shown in FIG. 9 (d), if each of the first insulator 4N and the second insulator 4P has a plurality of irregularities (V-shaped and inverted V-shaped) in cross-sectional view, the creepage is further increased. The distance can be extended. That is, the second portion upper surface 44S and the fourth portion lower surface 48S overlapping with the second portion upper surface 44S in the height direction A shown in FIG. 2 do not necessarily have to be flat. Moreover, it is possible to avoid or suppress the first and second insulators 4N and 4P from shifting in the circumferential direction θ.

<Method for Manufacturing Armature 20-Part 1>
The armature 20 employing the armature core 10 having the first to third insulators 4A, 4B, 4C described above can be manufactured as follows, for example. In addition, FIG. 5 is referred as a figure for demonstrating the manufacturing method of the armature 20. As shown in FIG. Although the coil 12 (see FIG. 2-4) is not shown in FIG. 5, instead of the first to third units 14A, 14B, and 14C, the first to third units in which the coil 12 is wound around them. The armature 20 can be manufactured using 16A, 16B, and 16C (see FIG. 2-4).

  Specifically, of the first unit 16A (see FIG. 2) in which the first insulator 4A and the coil 12 are provided in one tooth 2, the embedded portion 22b exhibited by the tooth 2 is provided in the yoke 6 and the holding member 8. Embed. Next, the second unit 16B in which the second insulator 4B and the coil 12 are provided on the other tooth 2 is disposed on one side + θ in the circumferential direction θ with respect to the first unit 16A (first step).

  The n-3 second units 16B are arranged along the height direction A on the side opposite to the first unit 16A (one side + θ in the circumferential direction θ) with respect to the second unit 16B disposed in the first step. Then, they are moved from the other side + A in the height direction A toward the one side -A in the height direction A, and are sequentially arranged so as to form an annular shape in a plan view (second step).

  After the second step, the third insulator 4C is connected to another tooth 2 between the n-3th second unit 16B and the side opposite to the first unit 16A disposed at the beginning of the first step. The third unit 16C provided with the coil 12 is arranged to move along the height direction A from the other side + A in the height direction A toward the one side −A in the height direction A.

  Since it is covered in the height direction A by the first coil pressing portions 40A, 40B, 40C and the second coil pressing portions 50A, 50B, 50C as described above, the first to third units 14A, 14B, 14C, 14D are covered. , 14E, and 14F, the first to third units 16A, 16B, and 16C each having the coil 12 wound thereon are moved along the height direction A to form the armature 20 without interfering with each other. it can.

<Example 2>
The armature core 10 or the armature 20 is not necessarily limited to the first to third units 14A, 14B, 14C, 16A, 16B, and 16C along the height direction A from the other side + A in the height direction A to the height direction A. There is no need to move to one side -A. For example, as shown in FIG. 10, the first to third units are moved along the radial direction R from the one side + R in the radial direction R to the other side −R in the radial direction R, and the armature The core 10b may be formed.

  Specifically, for example, the armature core 10b uses a tooth 2b instead of the above-described tooth 2 (see FIGS. 1-7), and uses a yoke 6b instead of the yoke 6 (see FIGS. 1, 5 and 6). In FIG. 10, for easy understanding of the structure, only one tooth 2b is shown separately from the yoke 6b, and the insulator 4 and the coil 12 are not shown.

  In the tooth 2b, a portion corresponding to the embedded portion 22b of the tooth 2 has an inverted T shape in a cross-sectional view. That is, the first embedded portion 22d extending in the height direction A from one side in the height direction A of the winding portion 22a in the cross-sectional view and the one side in the height direction A of the first portion 22d. -The 2nd embedding part 22e extended in the width direction T from A edge part is exhibited. The length W3 of the second embedded portion 22e in the width direction T is set to a length that does not cause interference between the second embedded portions 22e adjacent in the circumferential direction θ. Specifically, when the tooth 2b is disposed on the yoke 6b, the circumference 2πr of a circle whose radius is the length r from the rotation axis Q to the position closest to the rotation axis Q in the second embedded portion 22e. Is divided by the number nt of teeth 2b arranged in the yoke 6b (an example in which nt = 9 is illustrated in FIG. 10), that is, W3 = 2πr / nt or less.

  The yoke 6b has a substantially circular shape in a plan view and extends on a surface having the height direction A as a normal line. The yoke 6b has a plurality of grooves 7b formed radially about the rotation axis Q. Each of the grooves 7b opens to the outside in the radial direction R of the yoke 6b and does not open on the inside. Each of the grooves 7b has a shape that fits with the first embedded portion 22d and the second embedded portion 22e in a cross-sectional view. Therefore, the first embedded portion 22d and the second embedded portion 22e of the tooth 2b can be inserted along the groove 7b from the outside in the radial direction R toward the inside.

  The first to third insulators 4A, 4B, and 4C overlap in the height direction A, but do not overlap in the radial direction R. Therefore, when the tooth 2b is moved along the radial direction R in this manner to form the armature core 10b (or an armature employing the armature core 10b), the insulator provided in the tooth 2b is the first to third insulators. Any of 4A, 4B, and 4C may be arranged in any order. In addition, the armature core 10b (or an armature employing the armature core 10b) can be formed only by the second insulators 4B and 4E (see FIGS. 3 and 7).

  Specifically, for example, the second unit 14B in which the second insulator 4B is provided in each of the plurality of teeth 2b is moved sequentially toward the rotation axis Q along the groove 7b and sequentially disposed. If the armature core 10b is formed in this manner, the second part 44 and the third part 46 can be easily assembled without causing interference. And since it can be comprised by the insulator (only 2nd insulator 4B) of a single structure, manufacturing cost can be suppressed.

A First direction -A One side in the first direction + A The other side in the first direction Q Rotational axis θ Circumferential direction + θ One side in the circumferential direction -θ The other side in the circumferential direction T1, T2, T3 Thickness 2, 2a, 2b Teeth 4, 4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H, 4J, 4K Insulators 40A, 40B, 40C First coil presser 40T, 40U, 40V End face 42 First part 44 Second part 46 Third part 6, 6b Yoke 8, 8a Holding member 10, 10b Armature core 12 Coil 14A, 14D First unit 14B, 14E Second unit 14C, 14F Third unit 16A First unit 16B Second unit 16C Third unit 20 Armature 50A, 50B, 50C Second coil retainer 60 Rotating electric machine

Claims (13)

A plurality of teeth (2, 2a, 2b) arranged in an annular shape with a first direction (A) parallel to the rotation axis of the rotating magnetic field as an axis (Q) in the armature that generates the rotating magnetic field;
A plurality of insulators (4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H, 4J, 4K) surrounding each of the plurality of teeth in a direction perpendicular to the first direction;
The plurality of teeth are magnetically coupled on one side (-A) in the first direction,
The one side in the first direction of each of the insulators has a first coil pressing portion (40A, 40B, 40C) extending in a circumferential direction (θ) around the axis,
The first coil pressing portion overlaps with the other first coil pressing portion adjacent in the circumferential direction in the first direction.
Armature core (10, 10b). Each of the first coil pressing portions (40A, 40B, 40C) extends to the center of the distance along the circumferential direction between the teeth (2) adjacent in at least the circumferential direction (θ).
The armature core (10, 10b) according to claim 1. Of the two first coil holding portions (40A, 40B, 40C) adjacent in the circumferential direction, one circumferential side (+ θ) of one of the first coil holding portions is the first direction (A). The first portion (42) having a thickness along the first thickness (T1) and the second portion (44) having a second thickness (T2) smaller than the first thickness,
The second part exhibited by the one first coil pressing part extends adjacent to the one side in the circumferential direction of the first part exhibited by the one first coil pressing part,
The other side (−θ) in the circumferential direction of the other first coil pressing portion has a third portion (46) exhibiting the first thickness and a third thickness obtained by subtracting the second thickness from the first thickness. Presenting the fourth part (48) presenting (T3),
The fourth part exhibited by the other first coil pressing part extends adjacent to the other side in the circumferential direction of the first part exhibited by the other first coil pressing part,
An end face (40T) having a component perpendicular to the circumferential direction of the second part is in contact with an end face (40U) of the third part having the component,
The end face (40V) having the component of the fourth part is in contact with the end face (40W) having the component of the first part.
The armature core (10, 10b) according to claim 1 or 2. The other side (+ A) of the first direction (A) of each of the insulators (4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H, 4J, 4K) extends in the circumferential direction (θ). A second coil holding part (50A, 50B, 50C)
The second coil pressing portion extends to the center of the distance along the circumferential direction between the teeth (2) adjacent in the circumferential direction.
The armature core according to any one of claims 1 to 3. The second coil pressing portion overlaps with the other second coil pressing portion adjacent in the circumferential direction in the first direction.
The armature core (10, 10b) according to claim 4. A yoke (6, 6b) for magnetically coupling the teeth (2) to each other on the one side (-A) in the first direction (A);
The armature core (10, 10b) according to any one of claims 1 to 5. A holding member (8, 8a) for holding the plurality of teeth (2) on the one side (-A) in the first direction (A);
The armature core (10) according to any one of claims 1 to 6. The armature core (10, 10b) according to any one of claims 1 to 7,
A plurality of coils (12) wound around each of the insulators (4A, 4B, 4C, 4D, 4E, 4F, 4G, 4H, 4J, 4K) with the first direction (A) as an axis. ,
The coil wound around the one insulator is housed on the one insulator side from the center of the distance along the circumferential direction with the other adjacent insulators in the circumferential direction. (20). A method for manufacturing the armature core (10, 10b) according to any one of claims 3 to 7,
The one side (-A) in the first direction (A) of the second part (44) is located in the same plane as the one side in the first direction of the first part (42). Presenting
The other side (+ A) of the fourth part (48) in the first direction presents a surface located in the same plane as the other side of the third part (46) in the first direction,
The insulator is
A first insulator (4A, 4D) presenting the first part and the second part on both the one side (+ θ) and the other side (−θ) in the circumferential direction;
A second insulator (4B, 4E) presenting the first part and the second part on the one side in the circumferential direction and the third part and the fourth part on the other side in the circumferential direction;
A third insulator (4C, 4F) presenting the third part and the fourth part on both the one side and the other side in the circumferential direction;
The armature core has n (n: a natural number of 3 or more) teeth (2),
The first unit (14A, 14D) in which the first insulator is provided in one of the teeth, and the second unit (14B) in which the second insulator is provided in the other tooth on one side in the circumferential direction. , 14E), and
After the first step, another n-3 second units are placed on the one side in the circumferential direction of the second insulator from the other side in the first direction along the first direction. A second step of sequentially moving and moving toward the one side of the direction;
After the second step, between the first unit and the second unit, the third unit (14C, 14F) in which the third insulator is provided on the other teeth is disposed along the first direction. And a third step of moving and arranging from the other side in the first direction toward the one side in the first direction. A method for manufacturing the armature core (10, 10b) according to any one of claims 3 to 7,
The one side (-A) in the first direction (A) of the second part (44) presents the same surface as the one side in the first direction of the first part (42),
The other side (+ A) in the first direction of the fourth part (48) exhibits the same surface as the other side surface in the first direction of the third part (46),
The insulator is
A first insulator (4A, 4D) that presents the first part and the second part on both the one side (+ θ) and the other side (−θ) in the front circumferential direction;
A third insulator (4C, 4F) presenting the third part and the fourth part on both the one side and the other side in the circumferential direction;
The armature core has n (n: an even number of 4 or more) pieces of the teeth (2),
A first step in which a first unit (14A) provided with the first insulator on each of the (n / 2) teeth is annularly arranged in the circumferential direction;
After the first step, between the two first units adjacent in the circumferential direction, the third unit (14C) in which the third insulator is provided in each of the (n / 2) teeth, A method of manufacturing an armature core, comprising: a second step of moving and arranging the first direction in the first direction from the other side in the first direction toward the one side in the first direction. A method for manufacturing the armature core (10, 10b) according to any one of claims 3 to 7,
A unit (14A, 14B, 14C) in which the insulator (4A, 4B, 4C, 4D, 4E, 4F) is provided on each of the plurality of teeth is moved to the axis on a plane normal to the first direction. A method for manufacturing an armature core, comprising a step of moving and arranging the armature core. A method for manufacturing the armature core (10, 10b) according to any one of claims 3 to 7,
The one side (-A) in the first direction (A) of the second part (44) presents the same surface as the one side in the first direction of the first part (42),
The other side (+ A) in the first direction of the fourth part (48) exhibits the same surface as the other side surface in the first direction of the third part (46),
The insulator (4B, 4E) presents the first part and the second part on the one side (+ θ) in the circumferential direction (θ) and the second side (−θ) in the circumferential direction. Presenting 3 parts and the 4th part,
Manufacture of an armature core, comprising a step of disposing a unit (14B) provided with the insulator on each of a plurality of teeth by moving the unit (14B) toward the axis on a surface having the first direction as a normal line. Method. A method of manufacturing an armature (20) according to claim 8,
The one side (-A) in the first direction (A) of the second part (44) presents the same surface as the one side in the first direction of the first part (42),
The other side (+ A) in the first direction of the fourth part (48) exhibits the same surface as the other side surface in the first direction of the third part (46),
The insulator is
A first insulator (4A, 4D) presenting the first part and the second part on both the one side (+ θ) and the other side (−θ) in the circumferential direction (θ);
A second insulator (4B, 4E) presenting the first part and the second part on the one side in the circumferential direction and the third part and the fourth part on the other side in the circumferential direction;
A third insulator (4C, 4F) presenting the third part and the fourth part on both the one side and the other side in the circumferential direction;
The armature has n (n: a natural number of 3 or more) teeth (2),
The second insulator and the coil are provided on the other tooth on one side in the circumferential direction with respect to the first unit (16A) in which the first insulator and the coil (12) are provided on one of the teeth. A first step of disposing the second unit (16B),
After the first step, another n-3 second units are placed on the one side in the circumferential direction of the second unit from the other side in the first direction along the first direction. A second step of sequentially moving and moving toward the one side of the direction;
After the second step, a third unit (16C) in which the third insulator and the coil are provided on the other teeth is disposed between the first unit and the second unit along the first direction. And a third step of moving and arranging from the other side of the first direction toward the one side of the first direction.

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