WO2024053393A1

WO2024053393A1 - Armature of electric machine and electric machine

Info

Publication number: WO2024053393A1
Application number: PCT/JP2023/030233
Authority: WO
Inventors: 秀行前田
Original assignee: 三菱電機株式会社
Priority date: 2022-09-09
Filing date: 2023-08-23
Publication date: 2024-03-14

Abstract

This armature (30) comprises an insulating member (42) and an insulating sheet (41) which electrically insulate an armature core (10) and a driving coil (43), wherein the insulating sheet (41) has: two inter-phase insulating portions (41OUT) each covering the driving coil on opposite sides of a tooth portion (12) in a first direction (X); two intermediate portions (41IN) which are connected from the inter-phase insulating portions (41OUT) to the root of the tooth portion (12) and is sandwiched between a core back portion (11) and the insulating member (42); and a connection portion (41J) which connects the two intermediate portions (41IN) to each other at an upper side of the armature core (10) in a third direction (Z).

Description

Electromechanical armature and electromechanical

The present disclosure relates to an armature of an electric machine and an electric machine.

The armature of an electric machine is generally assembled by placing an insulating member on the teeth of the armature core, which is made by punching steel plates into a predetermined shape and then laminating them, and then winding a drive coil over the insulating member. It will be done. At this time, if the drive coils are wound in a disordered manner due to manufacturing variations, the drive coils of adjacent teeth portions may come into contact with each other.

Although the conductor of the drive coil is coated with an insulating coating, if the potential difference between the drive coils is large, insulation may not be maintained by the insulation performance of the insulating coating alone. In addition, there may be holes in the insulation coating during manufacturing, so some kind of insulation is required separately.

As a general insulation structure, a method is used to insulate drive coils by placing an insulation sheet between them. In this case, since it is necessary to arrange an insulating sheet after winding the drive coil, a structure with good productivity is being considered.

In Patent Document 1, the structure of the insulating sheet between adjacent drive coils of the armature is such that one insulating sheet is bent and the corners are folded into a bag shape, and the insulating sheet is used to insulate both adjacent teeth parts. It is inserted into a groove provided in a member, and is hardened and fixed with resin to ensure insulation between adjacent drive coils (see, for example, Patent Document 1 and FIG. 2).

Furthermore, in Patent Document 2, a bag-shaped bent portion of the insulating sheet on the root side of the tooth portion is inserted and held in a groove provided in the core (for example, see Patent Document 2, FIG. 10).

Patent No. 5924714 Patent No. 6593038

In Patent Document 1, the insulating member requires a groove into which the bent portion of the insulating sheet is inserted, and there is a problem that the area in the slot portion in which the drive coil can be placed becomes smaller. In addition to the thickness of two insulating sheets, it is necessary to provide a gap for easy insertion, so the width of the groove is also required. Models with small spacing between teeth or small models have a greater influence because the grooves occupy a larger proportion.

In Patent Document 2, the above problem does not occur because the armature core is provided with a groove that holds the insulating sheet. It is necessary to provide a creepage insulation distance so that creepage current does not flow along the surface of the object from the drive coil to the armature core, but in the configuration of Patent Document 2, this is ensured by the thickness of the insulating member. Therefore, in models where the voltage applied to the drive coil is high, the insulating member becomes thick. There is a problem in that as the insulating member becomes thicker, the area in the slot portion in which the drive coil is arranged is reduced.

The present disclosure discloses a technique for solving the above-mentioned problems, and it is possible to improve the ease of assembling the insulating sheet into the slot part while suppressing the reduction in the area in which the drive coil is arranged in the slot part. Aimed at obtaining the armature of electric machines and electric machines.

The armature of an electric machine according to the present disclosure includes:
an armature core having a core back portion and a plurality of teeth portions arranged in a first direction from the core back portion and protruding in a second direction orthogonal to the first direction; and a plurality of coils attached to the teeth portions. An armature having a winding body,
The coil wrapping body includes a drive coil;
comprising an insulating member and an insulating sheet that electrically insulate the armature core and the drive coil,
The insulating member includes a trunk portion that covers both side surfaces of the tooth portion in the first direction and both end surfaces of the tooth portion in a third direction perpendicular to the first direction and the second direction; A flange-shaped first flange provided at an end on the tip side of the teeth portion, and a first flange portion connected to the end portion of the body portion on the core back portion side, from the root position of the teeth portion of the core back portion to the forming a winding frame of the drive coil having a predetermined range in the first direction and a second flange portion that covers part of both end surfaces of the core back portion in the third direction;
The insulating sheet includes two interphase insulating parts each covering the drive coil from the outside in the first direction on both sides of the teeth part in the first direction;
two intermediate parts connected from each of the interphase insulation parts to the roots of the teeth parts and sandwiched between the core back part and the insulation member;
and a connecting portion connecting the two intermediate portions above the armature core in the third direction.
An electric machine according to the present disclosure includes the armature and a field arranged opposite to the tips of the teeth portions.

According to the armature of an electric machine and the electric machine according to the present disclosure,
It is also possible to improve the ease of assembling the insulating sheet into the slot portion while suppressing the reduction in the area in which the drive coil is arranged within the slot portion.

1 is a plan view showing a schematic configuration of an electric machine according to Embodiment 1. FIG. 1 is a plan view showing the configuration of an armature according to Embodiment 1. FIG. FIG. 2 is a side view of the armature according to the first embodiment. FIG. 3 is a rear view of the armature according to the first embodiment. 5 is a sectional view taken along line AA in FIG. 4. FIG. 5 is a sectional view taken along line BB in FIG. 4. FIG. FIG. 3 is a plan view of the insulating member according to the first embodiment. FIG. 3 is a side view of the insulating member according to the first embodiment. FIG. 3 is a rear view of the insulating member according to the first embodiment. 1 is a plan view of an insulating sheet according to Embodiment 1. FIG. 1 is a front view of an insulating sheet according to Embodiment 1. FIG. 1 is a developed view of an insulating sheet according to Embodiment 1. FIG. FIG. 2 is a front view showing a state in which the insulating sheet according to Embodiment 1 is attached to an armature core. FIG. 3 is a plan view showing a schematic configuration of a modified example of the armature according to the first embodiment. 7 is a plan view showing a modification of the insulating sheet according to Embodiment 1. FIG. FIG. 3 is a cross-sectional view of an armature using a modified insulating sheet according to the first embodiment. FIG. 3 is a developed view of an insulating sheet according to a second embodiment. FIG. 3 is a plan view of an insulating sheet according to a second embodiment. 19 is a sectional view taken along the line CC in FIG. 18. FIG. FIG. 7 is a cross-sectional view of the armature according to Embodiment 2 taken along the center line of the teeth portion in a third direction Z; FIG. 7 is a plan view of an armature of an electric machine according to a third embodiment. FIG. 7 is a side view of an armature according to Embodiment 3; FIG. 7 is a rear view of the armature according to Embodiment 3; 22 is a sectional view taken along line GG in FIG. 21. FIG. 25 is a sectional view taken along line DD in FIG. 24. FIG. FIG. 7 is a plan view of an insulating member according to Embodiment 3; FIG. 7 is a side view of an insulating member according to Embodiment 3; 27 is a sectional view taken along line EE in FIG. 26. FIG. FIG. 29 is a sectional view taken along line FF in FIG. 28; FIG. 7 is a cross-sectional view of an armature according to a third embodiment. FIG. 7 is a rear view of a coil-wound body according to Embodiment 3; FIG. 7 is a sectional view of an armature using a modified example of an insulating member according to Embodiment 3; FIG. 7 is a developed view of a modification of the insulating sheet according to Embodiment 3; FIG. 7 is a developed view of an insulating sheet according to Embodiment 4. FIG. 7 is a plan view of an insulating sheet according to Embodiment 4. 36 is a sectional view taken along the line FF in FIG. 35. FIG. FIG. 7 is a cross-sectional view of an insulating member according to a fourth embodiment. FIG. 7 is a cross-sectional view of the armature according to Embodiment 4 taken in a third direction Z along the center line of the teeth portion. 39 is a sectional view taken along line HH in FIG. 38. FIG. FIG. 5 is a plan view of an armature core of an electric machine according to a fifth embodiment. FIG. 5 is a plan view of an armature of an electric machine according to a fifth embodiment. FIG. 7 is a side view of an armature according to a fifth embodiment. FIG. 7 is a rear view of the armature according to Embodiment 5. 44 is a sectional view taken along line JJ in FIG. 43. FIG. 43 is a sectional view taken along line II in FIG. 42. FIG. FIG. 7 is a plan view of an insulating member according to Embodiment 5. FIG. 7 is a side view of an insulating member according to Embodiment 5. FIG. 7 is a rear view of an insulating member according to a fifth embodiment. FIG. 48 is a sectional view taken along line LL in FIG. 48. 48 is a sectional view taken along line KK in FIG. 47. FIG. FIG. 7 is a front view showing another example of an insulating sheet according to Embodiment 5. FIG. 7 is a rear view showing a state in which an insulating member is attached to the teeth portion, a drive coil is wound around the tooth portion, and an insulating sheet is attached. 44 is a cross-sectional view taken at the same position as the JJ cross-section in FIG. 43 in a state where the drive coil is wound after the insulating member is attached to the teeth part. FIG. 54 is a cross-sectional view taken at the same position as the II cross-section in FIG. 42 in the state shown in FIG. 53. FIG. FIG. 54 is a cross-sectional view of the state shown in FIG. 53 with an insulating sheet attached. 56 is a sectional view taken at the same position as the II section in FIG. 42 in the state shown in FIG. 55. FIG. 56 is a rear view of the state shown in FIG. 55. FIG.

Hereinafter, an armature of an electric machine and an electric machine according to each embodiment will be explained using figures.
In this specification, unless otherwise specified, the terms "upper" and "lower" assume a plane perpendicular to the stacking direction of the armature at a reference location, and include the center point of the armature with that plane as the boundary. The side that is exposed is called "lower" and the opposite side is called "upper." In addition, a plan view is a view seen from the stacking direction of the armature core, a front view is a view seen from the tip side of the teeth part, a rear view is a view seen from the core back part side, and a side view is a view seen from the side of the core back part. This is a view seen from one end of the core back part.

Embodiment 1.
FIG. 1 is a plan view showing a schematic configuration of an electric machine 100 according to a first embodiment. FIG. 1 shows a case where the tooth portion 12 includes three armatures 30.
FIG. 2 is a plan view showing the configuration of the armature 30. In FIG. 2, one coil wrapping body 40 is omitted from the illustration. Further, from FIG. 3 onward, only one tooth portion 12 and one coil wrapping body 40 are illustrated and described as the armature 30 for the sake of simplicity. The same applies to other embodiments.
FIG. 3 is a side view of the armature 30.
FIG. 4 is a rear view of the armature 30.
FIG. 5 is a sectional view taken along line AA in FIG.
FIG. 6 is a sectional view taken along line BB in FIG.

The electric machine 100 includes an armature 30 and a field 20. The field 20 includes a permanent magnet 21 forming a magnetic pole and a yoke 22 to which the permanent magnet 21 is attached. The field magnet 20 is configured by a plurality of permanent magnets 21 having different magnetic poles arranged alternately on a plate-shaped yoke 22 at predetermined intervals. A first direction X is the longitudinal direction of the yoke 22, that is, the direction in which the permanent magnets 21 are lined up.

The armature 30 has an armature core 10 formed by laminating a plurality of electromagnetic steel sheets in a direction perpendicular to the paper plane of FIG. As shown in FIG. 2, the armature core 10 includes a core back portion 11 extending in a first direction Y) and a plurality of teeth portions 12 arranged in the first direction X. The armature 30 is movable in the first direction X with respect to the field 20.

The area surrounded by the adjacent teeth portions 12 and the core back portion 11 is referred to as a slot portion S. A coil wrapping body 40 is attached to the teeth portion 12 of the armature core 10. The coil winding body 40 includes an insulating sheet 41, an insulating member 42, and a drive coil 43 wound around the insulating member 42. By mounting the coil winding body 40 around the teeth portion 12 of the armature core 10, the drive coil 43 is inserted into the slot portion S.

FIG. 7 is a plan view of the insulating member 42.
FIG. 8 is a side view of the insulating member 42.
FIG. 9 is a rear view of the insulating member 42.
As shown in FIG. 2, FIG. 4 to FIG. 6, and FIG. 7 to FIG. a flange-shaped first flange 42T1 provided at the end of the tooth portion 12 of the body portion 42A on the tip side of the tooth portion 12; It is connected to the end of the body part 42A on the core back part 11 side, and the side surface 11S of the core back part 11 in a predetermined range on both sides in the first direction X from the root position of the teeth part 12, and the core back part 11 It has a second flange portion 42T2 that covers a predetermined range of both end faces in the third direction Z. The insulating member 42 serves as a winding frame for the drive coil 43. The insulating member 42 is a member that insulates between the armature core 10 and the drive coil 43, and the teeth portion 12 is inserted into a body hole 42AH that penetrates the inside of the body 42A in the second direction Y, thereby insulating the armature core 10 and the drive coil 43. It is attached to the core 10.

The lower surface of the second flange portion 42T2 facing the armature core 10 extends over the entire length of the second flange portion 42T2 in the second direction Y, and extends in the third direction Z (vertical direction in FIG. 4). ) is provided with a recessed first groove M1 (recess), and a connecting portion of an insulating sheet 41, which will be described later, is arranged in this.

The first groove M1 is connected to the end surface on the back side (opposite side to the body section 42A side) of the second flange section 42T2, and the connecting section of the insulating sheet 41 passes through this when assembling the armature 30, which will be described later. I will do it. Although not shown, the second flange portion 42T2 is often used by providing a groove for guiding the lead-in wire of the drive coil 43 or having a function of holding a terminal for connecting the drive coil 43. In this description, one first groove M1 is arranged on both end faces of the armature core 10 in the third direction Z, but only one of the first grooves M1 may be provided.

Note that because a gap is generated between the body hole 42AH of the insulating member 42 and the teeth portion 12 due to manufacturing variations, the insulating member 42 is not fixed to the teeth portion 12. If fixing is necessary, there are two methods: providing a protrusion inside the body hole 42AH of the insulating member 42 and fixing it by sandwiching the teeth 12, inserting another member into the gap, or hardening with molded resin. etc. are used.

FIG. 10 is a plan view of the insulating sheet 41.
FIG. 11 is a front view of the insulating sheet 41.
FIG. 12 is a developed view of the insulating sheet 41.
FIG. 13 is a front view showing a state in which the insulating sheet 41 is attached to the armature core 10.
The insulating sheet 41 includes two interphase insulating parts 41OUT that each cover the drive coil 43 from the outside in the first direction X on both side surfaces of the teeth part 12 (both sides in the first direction An intermediate portion 41IN that connects to the root of the teeth portion 12 and is sandwiched between the insulating member 42 and the core back portion 11, and a connecting portion that connects the two intermediate portions 41IN to each other on the upper side of the armature core 10 in the third direction Z. 41J.

As shown in FIGS. 3 to 6, the insulating sheet 41 is held between the armature core 10 and the insulating member 42, and the interphase insulating part 41OUT of the insulating sheet 41 is inserted into the slot part S on both sides of the teeth part 12. The drive coil 43 housed in the drive coil 43 is covered from both outside sides in the first direction X. Further, the connecting portion 41J of the insulating sheet 41 is arranged within the first groove M1 of the insulating member 42. A seat hole 41H into which the teeth portion 12 is inserted is formed by the connecting portion 41J and the intermediate portion 41IN.

The insulating sheet 41 is created by cutting out a sheet and bending it into a predetermined shape as shown in FIG. The broken lines in FIG. 12 indicate the locations where the insulating sheet 41 is bent.

Here, the length of the interphase insulation part 41OUT of the insulating sheet 41 in the third direction Z is longer than the length of the intermediate part 41IN on the teeth part 12 side in the third direction Z, and The drive coils 43 are set to prevent contact between the drive coils 43 when placed between the drive coils 43.

The length of the insulating sheet 41 in the third direction Z is often set to be the same as the length of the drive coil 43 in the same direction, but the end of the drive coil 43 in the third direction Z has an arc shape and Since the interval between matching drive coils 43 becomes larger and the possibility that adjacent drive coils 43 come into contact with each other due to manufacturing variations becomes smaller, the length in the third direction Z may be shortened by that amount.

Further, a part of the intermediate part 41IN that is continuous from the interphase insulating part 41OUT (a part on the interphase insulating part 41OUT side) is set to have the same length as the interphase insulating part 41OUT of the insulating sheet 41. When this portion is attached to the armature core 10, the insulating sheet 41 comes to cover a part of the back surface of the insulating member 42, as shown in FIG. By doing so, a creepage insulation distance necessary for insulating the armature core 10 from flowing along the surface of the insulating member 42 from the drive coil 43 is ensured.

The thinner the insulating sheet 41 is, the smaller the area occupied by the insulating sheet 41 in the slot portion S can be. However, if the insulating sheet 41 is too thin, the insulating performance will deteriorate, so a thickness that provides a predetermined insulating performance is selected. The insulating sheet 41 is generally made of a PPS (Polyphenylene Sulfide) film, a PET (Polyethylene Terephthalate) film, a film laminated with aramid paper, or the like.

Next, the order of assembling the armature 30 will be explained.
First, the drive coil 43 is wound around the insulating member 42 (drive coil winding step).
Next, as shown in FIG. 13, the insulating sheet 41 is inserted into the armature core through the sheet holes 41H of the insulating sheet 41 into the tooth portions 12 of the armature core 10, so that the intermediate portion 41IN is in contact with the core back portion 11. (insulation sheet installation process).
Next, the insulating member 42 around which the drive coil 43 is wound is inserted into the teeth portions 12 of the armature core 10, and placed so that the insulating sheet 41 is sandwiched between the armature core 10 (insulating member attaching step).

The above is an example. Another method is to insert a plurality of insulating sheets 41 into the armature core 10 all at once, and then insert the insulating members 42 all at once. Alternatively, the insulating sheet 41 may be attached to the insulating member 42 and then inserted into the teeth portion 12 all at once, but since the insulating sheet 41 is not fixed, it takes effort to prevent it from falling off the insulating member 42.

According to the armature of the electric machine and the electric machine according to the first embodiment, since the insulating sheet 41 can be fixed to the armature core 10 by simply inserting the insulating sheet 41 into the teeth portion 12 and sandwiching it between the insulating members 42, adhesion of the insulating sheet 41, There is no need for fixing by welding or resin encapsulation, and the manufacturing process for the armature can be reduced. Furthermore, since the intermediate portions 41IN on both sides of the teeth portion 12 in the first direction are connected by the connecting portions 41J, the insulating sheets for the two slots can be attached at once, and the manufacturing process of the armature can be reduced. . Moreover, the thickness that the insulating sheet 41 occupies on the side surface of the core back part 11 of the slot part S is only one insulating sheet 41 . As a result, the number of insulating members 42 can be minimized while widening the winding area, and the ease of assembly can be improved as described above.

Although the example in which the teeth portions 12 of the armature core 10 are arranged parallel to each other in the first direction can be applied. Moreover, although the number of teeth parts has been described using an example of three, the number of teeth parts may be any number.

FIG. 14 is a plan view showing a schematic configuration of the armature 30B.
As shown in FIG. 14, even in the case of a rotating electrical machine in which the core back portion 11B of the armature core 10B has an annular shape and the teeth portions 12B are arranged radially toward the center of the core back portion 11B, the coil winding body 40 is applicable.

Further, although the case has been described in which the insulating sheet 41 has the connecting portions 41J on both sides in the third direction Z, only one of the connecting portions 41J may be provided.
Further, although the armature core 10 has been described in the case where the core back portion 11 is integrally provided with a plurality of teeth portions 12, the armature core 10 may be divided into teeth portions 12 and connected together.
In addition, when the armature core has a shoe section at the tip of the teeth section, the insulating member around which the drive coil is wound cannot be inserted into the teeth section 12, but the armature core is divided into the teeth section and the core back section. If this structure is used, the insulating member and the insulating sheet can be inserted from the core back part side of the divided teeth part, and then the teeth part and the core back part can be connected.

Further, even when using a one-tee core in which the tooth part and the core back part are integrated, which has a shoe part at the tip of the tooth part, the insulating member cannot be inserted as is. In this case, use an insulating member that is divided into two at the center in the third direction Z (stacking direction), insert the insulating sheet, insert it from both sides of the teeth in the third direction Z, and then wind the drive coil. Just turn it. However, it is necessary to separately prepare an insulation method for the split surface of the insulating member.

FIG. 15 is a plan view showing a modification of the insulating sheet.
FIG. 16 is a sectional view of an armature using a modified example of an insulating sheet 41B.
As shown in FIG. 15, the tab portion 41T connected to the connecting portion 41J of the insulating sheet 41B is bent in the second direction Y at right angles to the core back portion 11 side, and the bent tab portion 41T is insulated as shown in FIG. The member 42 is housed so as to extend into the first groove M1. When the width of the connecting portion in the third direction Z is large, the depth of the first groove M1 of the insulating member 42 in the third direction Z can be reduced by bending the connecting portion. This is because it can improve sexual performance.

Embodiment 2.
The armature of an electric machine and the electric machine according to the second embodiment will be described below, focusing on the differences from the first embodiment.
FIG. 17 is a developed view of the insulating sheet 241.
FIG. 18 is a plan view of the insulating sheet 241.
FIG. 19 is a sectional view taken along the line CC in FIG. 18.
FIG. 20 is a cross-sectional view of the armature 230 taken along the center line of the teeth portion 12 in the third direction Z.

As shown in FIG. 17, the insulating sheet 241 cut out from the sheet has a tab portion 241T that connects to the same connecting portion 241J as the connecting portion 41J described in the first embodiment. The tab portion 241T is formed by mountain-folding at two locations indicated by broken lines in FIG. 17, and as shown in FIG. 18.

Then, the tab portion 241T has a cross-sectional shape as shown in FIG.
The figure shows a cross section of the armature 230, in which the insulating sheet 241 is attached to the armature core 10 and the insulating member 42 around which the drive coil 43 is wound, is cut along the center line of the teeth portion 12 in the third direction Z. It will be like 20. The connecting portion 241J and the tab portion 241T are double bent so as to overlap in the third direction Z and are disposed in the first groove M1 of the insulating member 42, and the tab portion 241T connects the insulating member 42 and the armature core 10 It is sandwiched between the core back part 11 of. The other configurations are the same as in the first embodiment.

According to the armature of the electric machine and the electric machine according to the second embodiment, the depth of the first groove M1 in the third direction Z can be reduced, and the filling property of the resin during molding of the insulating member 42 can be improved.
Further, since a frictional force is generated between the insulating member 42 and the armature core 10 due to the repulsive force of the bent tab portion 241T, the insulating member 42 is difficult to come off from the armature core 10 in the direction in which the teeth portion 12 protrudes. . Further, the same effects as in the first embodiment are achieved.

Embodiment 3.
The armature of an electric machine and the electric machine according to the third embodiment will be described below, focusing on the differences from the first embodiment.
FIG. 21 is a plan view of an armature 330 of an electric machine according to the third embodiment.
FIG. 22 is a side view of armature 330.
FIG. 23 is a rear view of armature 330.
FIG. 24 is a sectional view taken along line GG in FIG. 21.
FIG. 25 is a sectional view taken along line DD in FIG. 24.
FIG. 26 is a plan view of the insulating member 342.
FIG. 27 is a side view of the insulating member 342.
FIG. 28 is a sectional view taken along line EE in FIG. 26.
FIG. 29 is a sectional view taken along line FF in FIG. 28.
FIG. 30 is a cross-sectional view of armature 330.
FIG. 31 is a rear view of armature 330.

As shown in FIGS. 21 to 25, in the armature 330, a plurality of coil winding bodies 340 are attached to a plurality of teeth portions 12 of the armature core 10, as in the first embodiment. The connecting portions 41J on both sides of the insulating sheet 41 in the third direction Z are inserted into the first holes M301 (recesses) of the insulating member 42. Note that the same insulating sheet 41 as in the first embodiment is used as the insulating sheet.

As described in Embodiment 1, the insulating member 342 is provided on both side surfaces 12S of the tooth portion 12 and on both end surfaces 12Z of the tooth portion 12 (in a third direction Z (laminated) perpendicular to the first direction a flange-shaped first flange 42T1 provided at the tip side end of the teeth portion 12 of the body 42A, and a core back portion 11 side of the body 42A. and the side surfaces 11S of the core back portion 11 in a predetermined range on both sides in the first direction It has a second flange portion 342T2 that covers a predetermined range. The insulating member 342 serves as a winding frame for the drive coil 43. The insulating member 342 is a member that insulates between the armature core 10 and the drive coil 43, and inserts the tooth portion 12 into the body hole 42AH that penetrates the inside of the body 42A in the second direction Y, thereby insulating the armature core 10 and the drive coil 43. It is attached to the core 10.

The differences from Embodiment 1 are the shape of the first hole M301 provided in the second flange 342T2 of the insulating member 342 and the width in the second direction Y. The width of the first hole M301 of the insulating member 342 in the second direction Y is the width for inserting the connecting portion 41J of the insulating sheet 41, and does not connect to the back surface of the insulating member 342 as in the first embodiment. Not yet. That is, it does not penetrate in the second direction Y. The first hole M301 extends in the first direction X along the root of the tooth portion 12, and its width in the first direction X is longer than the width of the tooth portion 12 in the first direction X.

As described above, the shape of the insulating sheet 41 is the same as in the first embodiment. In the third embodiment, the connecting portions 41J of the insulating sheet 41 are inserted into and held in the two first holes M301 of the insulating member 342, so if the connecting portions 41J easily come out, the length of the connecting portions 41J in the third direction Z is Adjust by increasing the length.

FIG. 32 is a cross-sectional view of an armature that uses an insulating member 342B that is a modified example of the insulating member 342.
FIG. 33 is a developed view of an insulating sheet 341B used together with an insulating member 342B.
In the explanation so far, since the same insulating sheet 41 as in Embodiment 1 is used, the width of the connecting portion 41J in the first direction It may be the width. In this case, the above-mentioned first hole M301 extends in the first direction Extend it like this. In this case, as shown in FIG. 33, installation is possible even if the length of the intermediate portion 341IN of the insulating sheet 341B in the third direction Z is the same as the length between the upper ends of the two connecting portions 41J.

Next, the order of assembling the armature 330 will be explained.
First, the drive coil 43 is wound around the insulating member 342 (drive coil winding step).

Next, as shown in FIGS. 21 to 25, a coil wrapping body 340 consisting of an insulating member 342 around which the drive coil 43 is wound and an insulating sheet 41 is inserted into the teeth portion 12 of the armature core 10.

At this time, the connecting parts 41J on both sides in the third direction Z of the insulating sheet 41 are inserted into the first holes M301 of the respective insulating members 342, but the connecting parts 41J on both sides in the third direction Z of the core back part 11 The length between the upper ends of the two connecting parts 41J of the insulating sheet 41 in the third direction Z is longer than the length between the two opposing surfaces of the insulating member 342 (excluding the first hole M301). long. Therefore, the two connecting portions 41J cannot be inserted into the first hole M301 as is.

Therefore, the insulating sheet 41 is bent in an arc shape (for example, the center part of the insulating sheet 41 in the third direction Z is convex in the second direction Y), and the distance between the upper ends of the two connecting parts 41J is adjusted to the core back part 11. The length in the third direction Z is made smaller than the length in the third direction Z and inserted into the first hole M301. Alternatively, one connecting portion 41J is first inserted into one first hole M301, and then when inserting the other connecting portion 41J into the other first hole M301, the insulating sheet 41 is inserted in the second direction. It may also be inserted with a Y bend.

According to the armature of the electric machine and the electric machine according to the third embodiment, the same effects as in the first embodiment are achieved.
In addition, the insulating sheet 41 can be assembled immediately after the drive coil 43 is wound around the insulating member 342, and the drive coil 43 can be covered with the interphase insulation part 41OUT of the insulating sheet 41, so that the coil is wound around the armature core 10. It is possible to prevent the drive coil 43 from being damaged during movement and storage until the mounting body 340 is attached.

In addition, since the work of attaching the insulating sheet 41 to the insulating member 342 and the work of attaching the insulating member 342 and the insulating sheet 41 to the core can be divided, the processes can be separated, increasing the degree of freedom in combining the work of the entire line. improves.

Furthermore, since it is not necessary to separately attach the insulating member 342 and the insulating sheet 41 to the armature core 10, the workability of attaching the insulating member 342 and the insulating sheet 41 to the armature core 10 is improved.

Embodiment 4.
The armature of an electric machine and the electric machine according to the fourth embodiment will be described below, focusing on the differences from the third embodiment.
FIG. 34 is a developed view of the insulating sheet 441.
FIG. 35 is a plan view of the insulating sheet 441.
FIG. 36 is a sectional view taken along line FF in FIG. 35.
FIG. 37 is a cross-sectional view of the insulating member 442.
FIG. 38 is a cross-sectional view of the armature 430 taken along the center line of the teeth portion 12 in the third direction Z.
FIG. 39 is a sectional view taken along line HH in FIG. 38.

As shown in FIG. 34, the insulating sheet 441 has a tab portion 441T that is connected to the connecting portion 441J and extends toward the inside of the sheet hole 441H. The tab portion 441T is formed by valley-folding at two locations indicated by broken lines as shown in FIGS. 35 and 36. The tab portion 441T has a cross-sectional shape as shown in FIG. 36.

As shown in FIG. 37, the insulating member 442 includes a tab insertion groove M2 (second groove) on the lower surface of the body portion 442A facing the teeth portion 12 of the armature core 10. This tab insertion groove M2 communicates with the first hole M301 (recess) of the second collar portion 442T2. The shape of the first hole M301 is similar to that of the third embodiment.

The cross section of the armature 430 with the insulating sheet 441 and the insulating member 442 attached to the armature core 10 is as shown in FIG. 38. As shown in FIG. 39, the width of the tab insertion groove M2 in the first direction X is larger than the width of the tab portion 441T in the same direction and smaller than the width of the teeth portion 12 in the same direction.

Further, as shown in FIGS. 38 and 39, the tab insertion groove M2 continues to penetrate to the first flange 442T1 of the insulating member 442, and is open to the first flange 442T1. The tab portion 441T bent so as to overlap in the third direction Z is inserted into the tab insertion groove M2 of the insulating member 442, and the tab portion 441T is bent in the third direction Z by the insulating member 442 and the teeth portion 12 of the armature core 10. It's caught in between. Here, the first hole M301 has been described as a concave portion recessed upward in the third direction Z described in the third embodiment, but it may be a groove penetrating in the first direction X. The other configurations are the same as in the third embodiment.

According to the armature of the electric machine and the electric machine according to the fourth embodiment, frictional force is generated between the insulating member 442 and the armature core 10 due to the repulsive force of the bent tab portion 441T, so that the insulating member 442 is attached to the armature core. It has the effect of making it difficult to get out of 10.
Moreover, it has the same effect as the third embodiment.

Embodiment 5.
The armature of an electric machine and the electric machine according to the fifth embodiment will be described below, focusing on the differences from the first embodiment.

FIG. 40 is a plan view of armature core 510 of an electric machine in Embodiment 5.
FIG. 41 is a top view of an armature 530 of an electric machine.
FIG. 42 is a side view of armature 530.
FIG. 43 is a rear view of armature 530.
FIG. 44 is a sectional view taken along line JJ in FIG. 43.
FIG. 45 is a sectional view taken along line II in FIG. 42.
FIG. 46 is a plan view of the insulating member 542.
FIG. 47 is a side view of the insulating member 542.
FIG. 48 is a rear view of the insulating member 542.
FIG. 49 is a sectional view taken along line LL in FIG. 48.
FIG. 50 is a sectional view taken along line KK in FIG. 47.
FIG. 51 is a front view showing another example of the insulating sheet 541.
FIG. 52 is a rear view showing a state in which the insulating member 542 is attached to the teeth portion 512, the driving coil 43 is wound around the insulating sheet 541, and the insulating sheet 541 is attached.
FIG. 53 is a cross-sectional view at the same position as the JJ cross-section of FIG. 43 in a state where the drive coil 43 is wound after the insulating member 542 is attached to the teeth portion 512.
FIG. 54 is a sectional view taken at the same position as the II section in FIG. 42 in the state of FIG. 53.
FIG. 55 is a cross-sectional view of the state shown in FIG. 53 with an insulating sheet 541 attached.
FIG. 56 is a sectional view taken at the same position as the II section in FIG. 42 in the state shown in FIG.
FIG. 57 is a rear view of the state shown in FIG. 55.

As shown in FIG. 40, the armature core 510 of the armature 530 is divided into teeth portions 512 and core back portions 511, with the core convex portion 12P of the teeth portion 512 and the recessed portion of the core back portion 511. 11R are fitted to form an armature core 510. Further, the end of the tooth portion 512 on the opposite side from the core back portion 511 has a shoe portion 12F. For the sake of simplicity, the description has been made using a diagram in which the teeth portion 512 is one, but the same applies even when there are a plurality of teeth portions as described in the first embodiment.

Similar to Embodiment 1, as shown in FIGS. 43 to 45, in the armature 530, a coil wrapping body 540 consisting of an insulating member 542, an insulating sheet 541, and a drive coil 43 is attached to the armature core 510. It is attached to the teeth portion 512. The connecting portions 541J on both sides in the third direction Z of the insulating sheet 541 are inserted into the first groove M1 (recess) of the insulating member 542, and both ends of the intermediate portion 41IN of the insulating sheet 541 in the third direction Z are insulated. It is inserted into the third groove M3 of the member 542.

Similar to Embodiment 1, the insulating member 542 shown in FIGS. a flange-shaped first flange 542T1 provided at an end on the tip side of the teeth portion 512 of the body 42A; The side surface 11S of the core back part 511 is connected to the end of the body part 42A on the side of the core back part 511, and extends from the root position of the teeth part 512 to the side surface 11S of the core back part 511 in a predetermined range on both sides of the first direction X (see FIG. 40). , and a second flange portion 542T2 that covers a predetermined range of both end surfaces of the core back portion 511 in the third direction Z.

The insulating member 542 becomes the winding frame of the drive coil 43. The insulating member 542 is a member that insulates between the armature core 510 and the drive coil 43, and is installed by inserting the teeth portion 512 into the body hole 42AH that penetrates the inside of the body 42A in the second direction Y. Ru.

The lower surface of the second flange portion 542T2 facing the armature core 510 has a first groove M1 (concave portion) extending over the entire length of the second flange portion 542T2 in the second direction Y and recessed in the third direction Z. is provided. The first groove M1 is connected to the end surface on the back side (opposite side to the body 42A side) of the second flange portion 542T2, and the connecting portion 541J of the insulating sheet 541 passes through this when assembling the armature 530. It happens.

Further, on the lower surface of the second flange portion 542T2 facing the armature core 510, it extends along the root of the teeth portion 512 over the entire length of the second flange portion 542T2 in the first direction X, and extends in the third direction Z. A recessed third groove M3 is provided. The width of the third groove M3 in the second direction Y is set to be equal to or greater than the thickness of the insulating sheet 541, and both end portions of the intermediate portion 41IN of the insulating sheet 541 in the third direction Z are inserted. After the insulating sheet 541 is attached, the core protrusion 12P of the teeth portion 512 is fitted into the recess 11R of the core back portion 511.

The difference from Embodiment 1 is that shoe portions 12F that protrude on both sides in the first direction X are provided at the tips of the teeth portions 512 on the side opposite to the core back portion 511 side. Next, the armature core 510 is formed by fitting the core protrusion 12P of the teeth portion 512 into the core recess 11R of the core back portion 511. The core recess 11R is formed on the surface facing the teeth 512 so as to be recessed in the second direction Y and extend in the third direction Z. Further, the core convex portion 12P is formed on the surface facing the core back portion 511 so as to protrude in the second direction Y and extend in the third direction Z.

Further, the second flange 542T2 of the insulating member 542 is provided with a third groove M3. Furthermore, the length of the intermediate portion 41IN of the insulating sheet 541 in the third direction Z is different. That is, since the shoe portion 12F is provided at the tip of the tooth portion 512, when inserting the insulating member 542 into the tooth portion 512, it is necessary to insert it from the side opposite to the shoe portion 12F. The insulating sheet 541 has the same form as in FIGS. 11 and 12 described in the first embodiment, but the length of the intermediate portion 41IN in the third direction Z is longer than that in the first embodiment.

Here, as shown in FIG. 43, the intermediate portion 41IN of the insulating sheet 541 is inserted into and held in the third groove M3 of the insulating member 542, but if it easily comes off, the intermediate portion 41IN in the third direction Z Adjust by increasing the length. If it is difficult to insert, shorten it and adjust. Further, as shown in a modification example in FIG. 51, both ends of the intermediate portion 541IN of the insulating sheet 541B in the third direction Z may be on the same straight line as both ends of the connecting portion 541J.

FIG. 52 shows an armature using an insulating member 542B which is a modification of the insulating member 542, in which the insulating member 542B is attached to the teeth portion 512 of the armature core 510 and the insulating sheet 541 is attached after the drive coil 43 is wound. It is a rear view of the stage in which the Only one second flange portion 542BT2 of the insulating member 542B is provided on one side in the third direction Z. Since the insulating sheet 541 is held by the teeth portions 512 and the insulating member 542B, it can be held even if there is only one second flange portion 542BT2.

Further, even if there are two second flange portions 542T2, the intermediate portion 41IN of the insulating sheet 541 is inserted into the third groove M3 in only one in the third direction Z, and in the other in the third direction Z, It may be short enough to not be inserted into the third groove M3. Even in this case, the insulating sheet 541 can be held.

Next, the order of assembling the armature 530 will be explained.
First, as shown in FIGS. 53 and 54, the insulating member 542 is attached to the teeth portion 512, and the drive coil 43 is wound around the insulating member 542 (drive coil winding step).

Next, as shown in FIGS. 55 to 57, an insulating sheet 541 is attached. At this time, the teeth portion 512 is inserted into the sheet hole 41H of the insulating sheet 541 from the side where the core convex portion 12P is provided. That is, the connecting portions 541J on both sides of the insulating sheet 541 in the third direction Z are inserted into the first grooves M1 of the respective insulating members 542, and slid toward the distal end side of the teeth portion 512, and the intermediate portion of the insulating sheet 541 is inserted into the first groove M1 of each insulating member 542. 41IN on both sides in the third direction Z are inserted into the third groove M3 of the insulating member 542.

Here, the length between the two intermediate portions of the insulating sheet 541 is longer than the length between the two surfaces (excluding the first groove M1) of the insulating member 542 facing both end surfaces of the core back portion 511 in the third direction Z. The length between the upper ends of 41IN in the third direction Z is longer. Therefore, the two intermediate portions 41IN cannot be inserted into the third groove M3 as is.

Therefore, the insulating sheet 541 is bent in an arc shape (for example, the center part of the insulating sheet 541 in the third direction Z is convex in the second direction Y), and the distance between the upper ends of the two intermediate parts 41IN is adjusted to the core back part 511. The length in the third direction Z is made smaller than the length in the third direction Z and inserted into the third groove M3. Alternatively, one intermediate portion 41IN may be first inserted into one third groove M3, and then the other intermediate portion 41IN may be inserted into the other third groove M3.

Thereafter, the assembly of the armature 530 is completed by fitting and fixing the core convex portion 12P of the teeth portion 512 into the core concave portion 11R of the core back portion 511 in the second direction Y. If there are multiple teeth portions 512, the same steps are repeated to assemble them.

According to the armature of the electric machine and the electric machine according to the fifth embodiment, the same effects as in the first embodiment are achieved.
Further, the insulating sheet 541 can be assembled immediately after the insulating member 542 is attached to the teeth portion 512 of the divided armature core 510 and the drive coil 43 is wound, and the drive coil 43 can be connected to the interphase insulating part 41 OUT of the insulating sheet 541. Therefore, it is possible to prevent the drive coil 43 from being damaged during movement until the tooth portion 512 is fitted to the core back portion 511 and during storage.

In addition, the work from attaching the insulating member 542 to the teeth portion 512 to the attachment of the insulating sheet 541 and the work of fitting the teeth portion 512 to the core back portion 511 can be divided, making it possible to separate the processes. , the degree of freedom in combining tasks across the line is improved.

Additionally, there is an advantage that the drive coil 43 can be wound with the insulating member 542 attached to the teeth portion 512. That is, since the force received from the drive coil 43 when the drive coil 43 is wound can be supported by the high-strength teeth portion 512, the strength required for the insulating member 542 sandwiched between the drive coil 43 and the teeth portion 512 can be reduced. The insulating member 542 can be formed thin. Thereby, the space factor of the drive coil 43 can be improved.

Furthermore, in the fifth embodiment, since the shoe portion 12F is provided at the tip of the teeth portion 512, the coil wrapping body 540 can be firmly fixed to the teeth portion 512.

Although this disclosure describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more embodiments may differ from those of a particular embodiment. The invention is not limited to application, and can be applied to the embodiments alone or in various combinations.
Accordingly, countless variations not illustrated are envisioned within the scope of the present disclosure. For example, this includes cases where at least one component is modified, added, or omitted, and cases where at least one component is extracted and combined with components of other embodiments.

100 Electric machine, 10, 10B, 510 Armature core, 11, 11B, 511 Core back part, 11R Core concave part, 12, 12B, 512 Teeth part, 11S, 12S side surface, 12Z both end faces, 12F shoe part, 12P core protrusion Part, 20 Field, 21 Permanent magnet, 22 Yoke, 30, 30B, 230, 330, 430, 530 Armature, 40, 340, 540 Coil winding body, 41, 41B, 241, 441, 341B, 541, 541B Insulation sheet, 41J, 241J, 441J, 541J connection part, 241T tab part, 41IN, 341IN, 541IN intermediate part, 41OUT interphase insulation part, 41T, 441T tab part, 41H, 441H seat hole, 42, 342, 342B, 442, 542, 542B insulation member, 42A, 442A body, 42AH body hole, 42T1, 542T1 first flange, 42T2, 342T2, 442T2, 542T2, 542BT2 second flange, 43 drive coil, M1 first groove, M3 second Three grooves, M2 tab insertion groove, M301B groove, M301 first hole, S slot part.

Claims

an armature core having a core back portion and a plurality of teeth portions arranged in a first direction from the core back portion and protruding in a second direction orthogonal to the first direction; and a plurality of coils attached to the teeth portions. An armature having a winding body,
The coil wrapping body includes a drive coil;
comprising an insulating member and an insulating sheet that electrically insulate the armature core and the drive coil,
The insulating member includes a trunk portion that covers both side surfaces of the tooth portion in the first direction and both end surfaces of the tooth portion in a third direction perpendicular to the first direction and the second direction; A flange-shaped first flange provided at an end on the tip side of the teeth portion, and a first flange portion connected to the end portion of the body portion on the core back portion side, from the root position of the teeth portion of the core back portion to the forming a winding frame of the drive coil having a predetermined range in the first direction and a second flange portion that covers part of both end surfaces of the core back portion in the third direction;
The insulating sheet includes two interphase insulating parts each covering the drive coil from the outside in the first direction on both sides of the teeth part in the first direction;
two intermediate parts connected from each of the interphase insulation parts to the roots of the teeth parts and sandwiched between the core back part and the insulation member;
an armature for an electric machine, comprising: a connecting portion connecting the two intermediate portions above the armature core in the third direction;
The armature for an electric machine according to claim 1, wherein a length of the interphase insulating portion in the third direction is longer than a length of the intermediate portion in the third direction.
The second flange portion has a recessed portion recessed in the third direction on a surface facing the armature core, and the connecting portion of the insulating sheet is disposed in the recessed portion. The armature of the electric machine according to item 2.
The armature for an electric machine according to claim 3, wherein the recess is a first groove that extends over the entire length of the second flange in the second direction and is recessed in the third direction.
The armature for an electric machine according to claim 3, wherein the recess is a hole that extends in the first direction along the root of the tooth portion and is longer than the width of the tooth portion in the first direction.
The armature for an electric machine according to claim 4, wherein the insulating sheet includes a tab portion connected to the connecting portion and housed in the first groove so as to extend in the second direction.
The insulating sheet includes a tab portion connected to the connecting portion and bent so as to overlap in the third direction,
The armature for an electric machine according to claim 6, wherein the tab portion is sandwiched between the insulating member and the core back portion.
The insulating sheet includes a tab portion connected to the connecting portion and bent so as to overlap in the third direction,
The insulating member has a second groove on a surface facing the armature core that extends in the second direction of the first flange and the body and communicates with the hole,
The armature for an electric machine according to claim 5, wherein the tab portion is sandwiched between the insulating member and the teeth portion within the second groove.
The armature core has a structure divided into the core back part and the teeth part,
The core back portion includes a core concave portion recessed in the second direction on a surface facing the teeth portion, and the teeth portion includes a core convex portion protruding in the second direction on a surface facing the core back portion. Equipped with
the core recess and the core protrusion are fitted;
The teeth portion has a shoe portion protruding on both sides in the first direction at a tip opposite to the core back portion in the second direction,
The recessed portion of the insulating member is a third groove extending along the root of the tooth portion over the entire length of the second collar portion in the first direction,
The armature for an electric machine according to claim 4, wherein both ends of the intermediate portion of the insulating sheet in the third direction are inserted into the third groove.
An armature of an electric machine according to any one of claims 1 to 9,
An electric machine comprising: a field magnet disposed opposite to the tips of the teeth portions.