JP6250149B2 - Armature core of rotating electrical machine and method for manufacturing armature - Google Patents

Description

  The present invention relates to an armature core and an armature manufacturing method for a rotating electrical machine such as an electric motor and a generator, and more particularly to an iron core structure capable of improving the productivity of the armature core and the operating characteristics of the rotating electrical machine.

  In a conventional rotating electric machine, an armature core is configured by connecting a plurality of substantially T-shaped split laminated cores each having a split yoke part and a magnetic pole tooth part in an annular shape. Each divided laminated core has a divided yoke portion and a magnetic pole tooth portion, and includes first and second divided core pieces that are stacked and joined to each other, and the divided yoke portion and the second divided core piece of the first divided core piece. The split yoke portion has a connection end portion extending in the opposite direction across the tooth portion in a state of being laminated with each other, and a connection end portion of the first split core piece is provided with a projection, and the connection of the second split core piece The end portion has a long hole extending along the circumferential direction of the divided yoke portion, and the protrusion of the first divided core piece of one adjacent divided laminated core is formed into the long hole of the second divided core piece of the other divided laminated core. A plurality of divided laminated iron cores are connected endlessly by loosely fitting, and the annular yoke portion is configured to be able to expand its diameter (for example, see Patent Document 1).

  In another conventional rotating electrical machine, the annular yoke is composed of a plurality of laminated yoke pieces that are rotatable with respect to each other, and magnetic pole teeth are formed on each yoke piece. A first piece having a long hole and a second piece having a protrusion are rotatably connected via the long hole and the protrusion, and the protrusion slides in the long hole so that the adjacent magnetic pole A part of the gap formed between the teeth is configured to be larger than the others (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 2002-281697 JP 2010-98938 A

  In the conventional rotating electrical machines shown in Patent Literatures 1 and 2, the gap between the desired magnetic teeth is enlarged by sliding the protrusion in the long hole or rotating the protrusion in the long hole. The coil was inserted into the slot from the gap between the magnetic pole teeth to improve the coil insertion workability.

  However, in the conventional rotating electrical machines shown in Patent Documents 1 and 2, in order to enlarge the gap between one magnetic pole tooth, the armature core is expanded or narrowed to the left and right around the corresponding magnetic tooth. Work is required, work man-hours increase, and workability decreases. In particular, in the case of a large or multi-layered armature core, the armature core becomes heavier, so in addition to the increase in work man-hours, the deformation of the armature core necessary to expand the gap between the magnetic pole teeth, A lot of energy is required for the moving work, and workability is lowered.

  In addition, if the accuracy of the roundness of the armature core is poor, the operating characteristics of the rotating electrical machine are affected. In the conventional rotating electrical machines shown in Patent Documents 1 and 2, since the armature core is configured to be endless by connecting a plurality of divided laminated cores (yoke pieces) at a connecting portion, the divided laminated core (yoke) The rigidity at the connecting portion of the piece is small, and the shape of the armature core is easily broken from this. Therefore, after the mounting of the coil to the armature core is completed, when returning the armature core to an annular shape, it becomes difficult to ensure the roundness of the armature core with high accuracy, and the operating characteristics of the rotating electrical machine are reduced. Bring about a decline.

  To solve this problem, the connecting part of the split laminated iron core (yoke piece) is fixed by welding or the like to increase rigidity, or the armature core that has been returned to the annular shape is pressed into a cylindrical member such as a housing or shrink-fitted. Although it can be fixed to increase the rigidity, the number of work steps is significantly increased. Further, in the method by press fitting or shrink fitting, it is necessary to increase the rigidity of the housing and to increase the processing accuracy of the press fitting surface of the housing, resulting in high cost.

  The present invention has been made to solve the above-described problems, and can increase the slot opening width of a target by simply moving one magnetic pole tooth in the circumferential direction, thereby improving the coil mounting workability. An armature for a rotating electrical machine that can be improved and that the back yoke is constructed by laminating and integrating an annular back yoke piece to improve the accuracy of the roundness of the iron core and increase the rigidity of the iron core. It aims at obtaining the manufacturing method of an iron core and an armature.

  An armature core of a rotating electrical machine according to the present invention includes an annular back yoke, and a plurality of magnetic pole teeth each protruding in the radial direction of the back yoke and arranged in the circumferential direction. Is formed by laminating and integrating annular back yoke pieces, and the plurality of magnetic pole teeth are constituted by laminating and integrating magnetic pole teeth pieces, respectively, and are separated from each other in the circumferential direction. Are connected to the back yoke so as to be reciprocally movable in the circumferential direction.

  In the present invention, each of the plurality of magnetic pole teeth is connected to the annular back yoke so as to be reciprocally movable in the circumferential direction between the first position and the second position that are separated in the circumferential direction. For example, the slot opening width can be increased by moving the teeth to the first position. Therefore, as in the prior art, in order to increase the slot opening width at a certain place, it is not necessary to expand the armature core left and right around the corresponding magnetic teeth, and the man-hour for mounting the coil can be reduced. Mounting workability is improved. Therefore, even with a large or multi-layered armature core, the slot opening width can be increased with less energy, and the coil mounting workability can be improved.

  Further, since the back yoke is constructed by laminating and integrating the annular back yoke pieces, the accuracy of the roundness of the armature core can be increased, and the operating characteristics of the rotating electrical machine can be improved. Furthermore, since the back yoke is configured in an annular shape, steps such as welding, press-fitting, and shrink fitting for increasing the rigidity of the armature core are not required, and the number of work steps can be reduced and the cost can be reduced. .

It is a top view which shows the rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view which shows the circumference | surroundings of the magnetic pole teeth of the armature core in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view which shows the arrangement | sequence state of the 1st back yoke piece and 1st magnetic pole tooth piece which comprise the armature core in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a principal part top view which shows the arrangement | sequence state of the 1st back yoke piece and 1st magnetic pole teeth which comprise the armature core in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view which shows the arrangement | sequence state of the 2nd back yoke piece and the 2nd magnetic pole tooth piece which comprise the armature core in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a principal part top view which shows the arrangement | sequence state of the 2nd back yoke piece and the 2nd magnetic pole tooth piece which comprise the armature core in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a figure explaining the movement operation | movement of the armature core magnetic pole teeth in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a figure explaining the method of mounting | wearing an armature coil with the armature core in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a top view which shows the arrangement | sequence state of the 3rd back yoke piece and the 2nd magnetic pole teeth piece which comprise the armature core of the embodiment in the rotary electric machine which concerns on Embodiment 1 of this invention. It is a principal part enlarged view which shows the surroundings of the magnetic pole teeth of the armature core in the rotary electric machine which concerns on Embodiment 2 of this invention. It is a principal part enlarged view which shows the surroundings of the magnetic pole teeth of the armature core in the rotary electric machine which concerns on Embodiment 2 of this invention. It is a principal part enlarged view which shows the surroundings of the magnetic pole teeth of the armature core in the rotary electric machine which concerns on Embodiment 3 of this invention. It is a principal part enlarged view which shows the surroundings of the magnetic pole teeth of the armature core in the rotary electric machine which concerns on Embodiment 4 of this invention. It is a top view which shows the rotary electric machine which concerns on Embodiment 5 of this invention. It is a top view which shows the arrangement | sequence state of the 1st back yoke piece and 1st magnetic pole tooth piece which comprise the armature core in the rotary electric machine which concerns on Embodiment 5 of this invention. It is a top view which shows the arrangement | sequence state of the 2nd back yoke piece and 2nd magnetic pole tooth piece which comprise the armature core in the rotary electric machine which concerns on Embodiment 5 of this invention. It is a figure explaining the method of mounting | wearing an armature coil with the armature core in the rotary electric machine which concerns on Embodiment 5 of this invention. It is a figure explaining the movement operation | movement of the magnetic teeth of the armature core in the rotary electric machine which concerns on Embodiment 6 of this invention. It is a principal part top view which shows the surroundings of the magnetic pole teeth of the armature core in the rotary electric machine which concerns on Embodiment 7 of this invention. It is a top view which shows the armature core in the rotary electric machine which concerns on Embodiment 8 of this invention. It is a principal part top view which shows the arrangement | sequence state of the 1st back yoke piece and 1st magnetic pole tooth piece which comprise the armature core in the rotary electric machine which concerns on Embodiment 8 of this invention. It is a principal part top view which shows the arrangement | sequence state of the 2nd back yoke piece and the 2nd magnetic pole tooth piece which comprise the armature core in the rotary electric machine which concerns on Embodiment 8 of this invention.

Hereinafter, preferred embodiments of an armature core and an armature manufacturing method for a rotating electric machine according to the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a plan view showing a rotating electrical machine according to Embodiment 1 of the present invention, FIG. 2 is a plan view showing around the magnetic teeth of the armature core in the rotating electrical machine according to Embodiment 1 of the present invention, and FIG. FIG. 4 is a plan view showing an arrangement state of the first back yoke piece and the first magnetic pole tooth piece constituting the armature core in the rotary electric machine according to the first embodiment of the invention, and FIG. 4 is a rotary electric machine according to the first embodiment of the invention. FIG. 5 is a main part plan view showing an arrangement state of the first back yoke piece and the first magnetic pole tooth piece constituting the armature core in FIG. 5, and FIG. 5 is a diagram showing the armature core in the rotary electric machine according to Embodiment 1 of the present invention. FIG. 6 is a plan view showing the arrangement of the two back yoke pieces and the second magnetic pole tooth pieces, and FIG. 6 shows the second back yoke piece and the second magnetic pole tee constituting the armature core in the rotary electric machine according to Embodiment 1 of the present invention. Is a plan view showing an arrangement state of the scan strip. FIG. 7 is a view for explaining the movement operation of the magnetic teeth of the armature core in the rotary electric machine according to Embodiment 1 of the present invention. FIG. 7 (a) shows a state where the magnetic teeth are located at the second position. FIG. 7B shows a state in which one magnetic pole tooth is located at the first position. FIG. 8 is a view for explaining a method of mounting the armature coil on the armature core in the rotary electric machine according to Embodiment 1 of the present invention.

  In FIG. 1 and FIG. 2, the rotating electrical machine 100 surrounds the rotor 1 via a certain gap between the rotor 1 disposed in a housing (not shown) and the rotor 1. And an armature 10 held coaxially in the housing.

  The rotor 1 includes a rotor core 3 fixed to a rotary shaft 2 inserted at the axial center position, and a magnet 4 disposed on the outer peripheral surface of the rotor core 3. Here, ten magnets 4 are arranged on the outer peripheral surface of the rotor core 3 at an equiangular pitch in the circumferential direction.

  The armature 10 is an electric machine in which a plurality of magnetic pole teeth 13 are arranged radially inwardly projecting from the inner peripheral wall surface of the annular back yoke 12 and are arranged at a regular pitch in the circumferential direction. An armature coil 15 composed of a core core 11, a coil 15 a formed by winding a conductor wire around a slot 14 positioned on both sides of two magnetic pole teeth 13 that are continuous in the circumferential direction; And an insulator (not shown) interposed between the core iron core 11 and the armature coil 15.

  As shown in FIGS. 3 to 6, the back yoke 12 includes annular first and second back yoke pieces 20, 21 punched from an electromagnetic steel plate. Then, 24 rectangular cutout portions 20a are formed at equiangular pitches in the circumferential direction on the inner circumferential side of the first back yoke piece 20 so as to open radially inward. Further, the punched caulking portions 20b are formed at an equiangular pitch on the outer peripheral side of the first back yoke piece 20 so as to be positioned between the cutout portions 20a. In addition, 24 long hole portions 21a are formed at equiangular pitches in the circumferential direction on the inner circumferential side of the second back yoke piece 21 with the hole direction as the circumferential direction. Further, the punched caulking portions 21b are formed at equiangular pitches on the outer peripheral side of the second back yoke piece 21 so as to be positioned between the long hole portions 21a. And when the 1st back yoke piece 20 and the 2nd back yoke piece 21 are piled up, the extraction caulking parts 20b and 21b overlap, and the long hole part 21a is located in the notch part 20a. Here, the hole shape of the long hole portion 21 a is configured such that both the inner peripheral side and the outer peripheral side edge portions extending in the circumferential direction are part of a cylindrical surface centering on the axis of the second back yoke piece 21. In addition, both end faces in the circumferential direction each have an arc shape formed by a part of a cylindrical surface having a distance (hole width) between both edges as a diameter.

  As shown in FIGS. 3 to 6, the magnetic pole teeth 13 include first and second magnetic pole teeth pieces 25 and 26 punched from an electromagnetic steel plate. The first magnetic pole tooth piece 25 includes a base portion 25a, a flange portion 25b protruding from the tip of the base portion 25a to both sides in the circumferential direction, a punched caulking portion 25c formed at the center position of the base portion 25a, and a periphery of the base portion of the base portion 25a. A projecting portion 25d projecting radially outward from the center in the direction, a shaft portion 25e formed in a dowel shape on the projecting end side of one surface of the projecting portion 25d, and having a diameter slightly smaller than the hole width of the long hole portion 21a; Is provided. The second magnetic pole tooth piece 26 includes a base portion 26a, a flange portion 26b that protrudes from the tip of the base portion 26a to both sides in the circumferential direction, and a punching portion 26c that is formed at the center position of the base portion 26a. The first magnetic pole tooth piece 25 is formed in the same outer shape as that of the second magnetic pole tooth piece 26 except for the protruding portion 25d and the shaft portion 25e. And when the 1st magnetic pole tooth piece 25 and the 2nd magnetic pole tooth piece 26 are piled up, the extraction caulking part 25c, 26c overlaps.

  In order to produce the armature core 11, first, the first back yoke piece 20 is disposed, and then, as shown in FIGS. 3 and 4, the protruding portions 25d are respectively inserted into the notches 20a. The base portion 25a protrudes radially inward, the first magnetic pole tooth piece 25 is on the inner peripheral side of the first back yoke piece 20, and is flush with the first back yoke piece 20, and is equiangular in the circumferential direction. Place with. Next, the second back yoke piece 21 is disposed on the first back yoke piece 20 so that the shaft portion 25e is placed in the elongated hole portion 21a. Further, the second magnetic pole tooth piece 26 is placed on each of the first magnetic pole tooth pieces 25 so as to be flush with the second back yoke piece 21. This operation is repeated as many times as necessary, and the laminated body of the first and second back yoke pieces 20 and 21 is fixed and integrated by fitting the crimping portions 20b and 21b, thereby forming the annular back yoke 12. In addition, the laminated body of the first and second magnetic pole teeth pieces 25 and 26 is fixed and integrated by fitting the caulking portions 25c and 26c, so that the magnetic pole teeth 13 are formed.

  In the armature core 11 manufactured as described above, the shaft portion 25e can slide in the elongated hole portion 21a in the hole direction of the elongated hole portion 21a, that is, in the circumferential direction. Therefore, the magnetic teeth 13 reciprocate between a first position where the shaft portion 25e contacts one end in the circumferential direction of the long hole portion 21a and a second position where the shaft portion 25e contacts the other circumferential end of the long hole portion 21a. It is possible to attach to the back yoke 12. Then, as shown in FIG. 7A, when each shaft portion 25e of the magnetic pole teeth 13 is in contact with the other circumferential end of the elongated hole portion 21a, a gap between adjacent magnetic pole teeth 13, that is, a slot opening width is obtained. Is reduced. Further, as shown in FIG. 7B, when the shaft portion 25e of one magnetic pole tooth 13 is in contact with one end in the circumferential direction of the elongated hole portion 21a, the gap between adjacent magnetic pole teeth 13, that is, the slot opening width is increased. It becomes an enlarged state.

  Next, the operation of inserting the coil 15a will be described with reference to FIG. In FIG. 8, for convenience of explanation, a slot 14 positioned on one side of two magnetic teeth 13 that are continuous in the circumferential direction is a slot 14.₁And the slot 14 located on the other side is the slot 14₂And slot 14 ₁Magnetic pole teeth 13 on one side in the circumferential direction of the magnetic teeth 13₁And slot 14₁Magnetic pole teeth 13 on the other side of the circumferential direction of the magnetic teeth 13₂, Slot 14₂Magnetic pole teeth 13 on one side in the circumferential direction of the magnetic teeth 13_ThreeAnd slot 14₂Magnetic pole teeth 13 on the other side of the circumferential direction of the magnetic teeth 13_FourAnd

  First, the magnetic teeth 13 are slid so that the shaft portion 25e is in contact with the other circumferential end of the elongated hole portion 21a, and each of the magnetic teeth 13 is positioned at the second position. As a result, the slot opening width between adjacent magnetic teeth 13 is reduced. Each of the coils 15a is produced by winding a conductor wire a plurality of times in a ring shape.

Then, in the respective slots 14 _1, 14 ₂ located on either side of the two pole tooth 13 which circumferentially continuous, as shaft portion 25e is in contact with one circumferential end of the long hole 21a, the slots 14 _1, 14 _The magnetic pole teeth 13 ₁ , 13 ₃ located on one circumferential side of ₂ are slid to the first position, and the slot opening width is expanded. Then, the conductor wire bundle of the coil 15a is inserted into the slots 14 ₁ and 14 ₂ from the enlarged slot opening. Next, the magnetic pole teeth 13 ₁ , 13 ₃ located on one side in the circumferential direction of the slots 14 ₁ , 14 ₂ are slid and returned to the second position, and one coil 15 a is attached to the armature core 11. This operation is repeated, and the coils 15a are mounted on the armature core 11 one by one, even by one slot pitch counterclockwise in FIG.

Here, when the third and subsequent coils 15a are attached to the armature core 11, the slots 14 ₁ positioned on one side of the _two magnetic pole teeth 13 ₂ and 13 _{3 that} are continuous in the circumferential direction have other coils 15a. The conductor wire bundle is not inserted, but the conductor wire bundle of the other coil 15a is inserted into the slot 14 ₂ positioned on the other side of the _two magnetic pole teeth 13 ₂ and 13 ₃ that are continuous in the circumferential direction. The slot 14 ₁ to conductor wire bundles of the other coil 15a is not inserted, it is easy to insert the conductor wire bundles of the coil 15a. However, it is difficult to insert the conductor wire bundle of the coil 15a into the slot 14 ₂ in which the conductor wire bundle of the other coil 15a is inserted.

In the first embodiment, the magnetic pole teeth 13 ₁ and 13 ₃ positioned on one side in the circumferential direction of the slots 14 ₁ and 14 ₂ are slid to the first position to increase the slot opening width, and then the conductor wire bundle of the coil 15a. Is inserted into the slots 14 ₁ and 14 ₂ , the conductor wire bundle of the coil 15a can be easily inserted into the slot 14 ₂ into which the conductor wire bundle of the other coil 15a is inserted. In addition, after inserting the conductor wire bundle of the coil 15a into the slot 14 ₂ , the magnetic pole teeth 13 ₃ are returned to the second position, so that the magnetic pole teeth 13 ₄ are pressed to the second position side and the shaft portion 25e of the magnetic pole teeth 13 ₄ is The magnetic pole teeth 13 ₄ are positioned and fixed at the second position by coming into contact with the other circumferential end of the elongated hole portion 21a.

  As described above, according to the first embodiment, the back yoke 12 is manufactured by stacking the first and second back yoke pieces 20 and 21 that are punched in an annular shape, and the magnetic pole teeth 13 are formed on the inner periphery of the back yoke 12. It is connected to the back yoke 12 so as to be reciprocally movable in the circumferential direction between the first position and the second position. Therefore, the magnetic pole teeth 13 positioned on one side of the slot 14 into which the conductor wire bundle is inserted are moved to the first position, the slot opening width is expanded, and the conductor electric flux of the coil 15a is expanded from the expanded slot opening to the slot. 14 can be inserted. As a result, the coil 15a can be easily mounted on the armature core 11, and the mounting workability of the coil 15a is improved. Furthermore, the coil 15a can be easily inserted into the slot 14 in an aligned manner, the space factor can be improved, and the operating characteristics of the rotating electrical machine 100 can be improved.

The slot opening width can be increased only by moving the magnetic teeth 13 in the circumferential direction without deforming and moving the back yoke 12, and the workability of inserting the coil 15a into the slot 14 can be improved. Therefore, the same effect can be obtained for the armature core 11 having a large diameter or a large number of layers only by requiring less energy.
Since the back yoke 12 is formed by laminating and integrating the annular first and second back yoke pieces 20 and 21, the roundness of the iron core can be increased and the operating characteristics of the rotating electrical machine 100 can be improved. it can. Moreover, since it is not necessary to return the armature core 11 to an annular shape after the coil 15a is attached to the armature core 11, the roundness of the armature core 11 can be ensured with high accuracy.

  Further, in Patent Documents 1 and 2, since the armature core is configured by connecting a plurality of divided laminated cores endlessly, in order to increase the rigidity of the armature core, a connecting portion constituting the divided laminated core is provided. A step of fixing by welding or the like, or a step of fixing the armature core returned to an annular shape to a cylindrical member such as a housing by press fitting or shrink fitting is necessary. In the first embodiment, these steps required in Patent Documents 1 and 2 are not required, and the number of work steps can be reduced and the cost can be reduced.

  In the first embodiment, the armature core 11 includes the first back yoke piece 20 and the first magnetic pole tooth piece 25, and the second back yoke piece 21 and the second magnetic pole tooth piece 26 alternately. However, the armature core does not have to be composed of only the first and second back yoke pieces 20 and 21 and the first and second magnetic pole teeth pieces 25 and 26, but the first back yoke. It suffices to have at least one laminated body of a set of the piece 20 and the first magnetic pole tooth piece 25 and a set of the second back yoke piece 21 and the second magnetic pole tooth piece 26.

  For example, as shown in FIG. 9, an annular third back yoke piece 22 and a second magnetic pole tooth piece 26 punched from an electromagnetic steel sheet are prepared. The third back yoke piece 22 is manufactured in the same manner as the second back yoke piece 21 except that the long hole portion 21a is omitted. Note that the blanking portion 22b corresponds to the blanking portion 21b. Then, a part of the laminated parts constituting the armature core is constituted by laminating the first and second back yoke pieces 20 and 21 and the first and second magnetic pole teeth pieces 25 and 26 to constitute the armature core. The remaining laminated portion may be configured by laminating the third back yoke piece 22 and the second magnetic pole piece 26. In this case, the proportion of the notch 20a in the back yoke 12 is reduced, and the amount of iron constituting the armature core can be increased, so that the operating characteristics of the rotating electrical machine can be improved, for example, the efficiency of the motor can be improved.

Embodiment 2. FIG.
FIGS. 10 and 11 are enlarged views of main portions showing the periphery of the magnetic teeth of the armature core in the rotary electric machine according to Embodiment 2 of the present invention. FIG. 10 is a state where the magnetic teeth are located at the second position. FIG. 11 shows a state where one magnetic pole tooth is located at the first position.

  10 and 11, the second back yoke piece 23 is punched out in an annular shape from the electromagnetic steel sheet, and the arc-shaped long hole portions 23 a are respectively formed in the second back yoke piece 23 with the hole direction as the circumferential direction. It is formed at an equiangular pitch in the circumferential direction on the circumferential side. Further, the punched and crimped portions 23b are formed at an equiangular pitch on the outer peripheral side of the second back yoke piece 23 so as to be positioned between the long hole portions 23a. Furthermore, the convex part 23c is formed so that the circumferential direction both ends of the edge part of the outer peripheral side extended in the circumferential direction of the long hole part 23a may protrude in an inner peripheral side.

The second back yoke piece 23 is configured in the same manner as the second back yoke piece 21 in the first embodiment except that the convex portion 23c is formed.
The second embodiment is configured in the same manner as in the first embodiment except that the second back yoke piece 23 is used instead of the second back yoke piece 21.

  In the armature core 11A according to the second embodiment, the set of the first back yoke piece 20 and the first magnetic pole tooth piece 25 and the set of the second back yoke piece 23 and the second magnetic pole tooth piece 26 are alternately stacked. It is configured. And when the 1st back yoke piece 20 and the 2nd back yoke piece 23 are piled up, extraction caulking parts 20b and 23b overlap, and the layered product of the 1st and 2nd back yoke pieces 20 and 23 is unified, The back yoke 12A is produced. Further, the laminated body of the first and second magnetic pole tooth pieces 25 and 26 is integrated by fitting the caulking portions 25c and 26c, whereby the magnetic pole teeth 13 are produced. And the protrusion part 25d of the 1st magnetic pole teeth piece 25 is inserted in the notch part 20a, and the axial part 25e is inserted in the long hole part 23a in a loose-fit state.

In the second embodiment, the back yoke 12A is manufactured by laminating the first and second back yoke pieces 20 and 23 that are annularly punched, and the magnetic pole teeth 13 are positioned on the inner peripheral side of the back yoke 12A. It is connected to the back yoke 12A so as to reciprocate in the circumferential direction between the first position and the second position. Therefore, also in the second embodiment, the same effect as in the first embodiment can be obtained.

  In the second embodiment, the convex portion 23c is formed so as to project both ends in the circumferential direction of the outer peripheral edge extending in the circumferential direction of the elongated hole portion 23a toward the inner circumferential side, and the hole width (diameter) of the elongated hole portion 23a. (Direction width) is narrow at the position of the convex portion 23c. Therefore, the shaft portion 25e slides to one side in the circumferential direction along the hole direction of the long hole portion 23a, and elastically deforms the convex portion 23c outward in the radial direction to get over the convex portion 23c, as shown in FIG. As a result, it is located in the 1st position which touches one end of long hole part 23a. Further, the shaft portion 25e slides and moves to the other side in the circumferential direction along the hole direction of the long hole portion 23a, elastically deforms the convex portion 23c radially outward, and climbs over the convex portion 23c, as shown in FIG. As a result, it is located at the second position in contact with the other end of the slot 23a. In order for the shaft portion 25e to get over the convex portion 23c, a force that elastically deforms the convex portion 23c is required, so that the shaft portion 25e, that is, the magnetic pole teeth 13, is positioned and held at the first position and the second position. In addition, the force over the convex part 23c can be set by adjusting the protrusion amount of the convex part 23c.

  According to the second embodiment, the magnetic pole teeth 13 can be easily and accurately positioned and held at the first position and the second position, so that the man-hours for manufacturing the armature can be reduced and the position of the magnetic pole teeth 13 varies. The operating characteristics of the rotating electrical machine can be improved.

  In the second embodiment, the convex portion 23c is formed so as to project both ends in the circumferential direction of the outer peripheral edge extending in the circumferential direction of the elongated hole portion 23a toward the inner peripheral side. May be formed so that both ends in the circumferential direction of the inner peripheral edge extending in the circumferential direction of the elongated hole portion 23a protrude toward the outer peripheral side.

Embodiment 3 FIG.
FIG. 12 is an enlarged view of a main part showing the periphery of the magnetic teeth of the armature core in the rotary electric machine according to Embodiment 3 of the present invention.

  In FIG. 12, the second back yoke piece 24 is punched out in an annular shape from the magnetic steel sheet, and the arc-shaped long hole portions 24 a are respectively formed on the inner peripheral side of the second back yoke piece 24 with the hole direction as the circumferential direction. It is formed at an equiangular pitch in the circumferential direction. Further, the punched caulking portions 24b are formed at an equiangular pitch on the outer peripheral side of the second back yoke piece 24 so as to be positioned between the long hole portions 24a. Moreover, the convex part 24c is formed so that the circumferential direction both ends of the edge part of the outer peripheral side extended in the circumferential direction of the long hole part 24a may protrude in the inner peripheral side. Further, an auxiliary hole 24d is formed in the second back yoke piece 24 in the vicinity of the convex portion 24c on the outer peripheral side of the convex portion 24c, facing the elongated hole portion 24a with the convex portion 24c interposed therebetween.

The second back yoke piece 24 is configured in the same manner as the second back yoke piece 21 in the first embodiment except that the convex portion 24c and the auxiliary hole 24d are formed.
The third embodiment is configured in the same manner as in the first embodiment except that the second back yoke piece 24 is used instead of the second back yoke piece 21.

  In the armature core 11B according to the third embodiment, the set of the first back yoke pieces 20 and the first magnetic pole tooth pieces 25 and the set of the second back yoke pieces 24 and the second magnetic pole tooth pieces 26 are alternately laminated. It is configured. Then, when the first back yoke piece 20 and the second back yoke piece 24 are overlapped, the caulking portions 20b and 24b are overlapped, and the laminated body of the first and second back yoke pieces 20 and 24 is integrated, The back yoke 12B is produced. Further, the laminated body of the first and second magnetic pole tooth pieces 25 and 26 is integrated by fitting the caulking portions 25c and 26c, whereby the magnetic pole teeth 13 are produced. The protruding portion 25d of the first magnetic pole tooth piece 25 is inserted into the cutout portion 20a, and the shaft portion 25e is inserted into the elongated hole portion 24a in a loosely fitted state.

In the third embodiment, the back yoke 12B is manufactured by stacking the first and second back yoke pieces 20 and 24 that are annularly punched, and the magnetic pole teeth 13 are positioned on the inner peripheral side of the back yoke 12B. It is connected to the back yoke 12B so as to be reciprocally movable in the circumferential direction between the first position and the second position. Therefore, also in Embodiment 3, the same effect as in Embodiment 1 can be obtained.

  In the third embodiment, the convex portion 24c is formed so as to project both ends in the circumferential direction of the outer peripheral edge extending in the circumferential direction of the long hole portion 24a to the inner peripheral side, and the hole width (diameter) of the long hole portion 24a. (Direction width) is narrow at the position of the convex portion 24c. Further, the auxiliary hole 24d is formed close to the outer peripheral side of the convex portion 24c, and the convex portion 24c is formed thin, and is easily elastically deformed.

  Therefore, the shaft portion 25e slides to one side in the circumferential direction along the hole direction of the long hole portion 24a, and pushes up the convex portion 24c when getting over the convex portion 24c. Thereby, the thin convex part 24c formed between the auxiliary hole 24d and the long hole part 24a is elastically deformed, and the shaft part 25e gets over the convex part 24c. When the shaft portion 25e gets over the convex portion 24c, the convex portion 24c is restored. And the axial part 25e moves to the one side of the circumferential direction by the restoring force of the convex part 24c, and is located in the 1st position which touches the end of the circumferential direction of the long hole part 24a. Similarly, the shaft portion 25e slides to the other side in the circumferential direction along the hole direction of the long hole portion 23a, elastically deforms the convex portion 24c, gets over the convex portion 24c, and moves to the other end of the long hole portion 24a. It is located in the 2nd position which touches. In order for the shaft portion 25e to get over the convex portion 24c, a force for elastically deforming the convex portion 24c is required, so that the magnetic pole teeth 13 are positioned and held at the first position and the second position. In addition, the force over the convex part 24c can be set by adjusting the thickness of the convex part 24c between the auxiliary hole 24d and the long hole part 24a.

  According to the third embodiment, the magnetic pole teeth 13 can be easily and accurately positioned and held at the first position and the second position, so that the manufacturing process of the armature can be reduced, and variation in the position of the magnetic pole teeth 13 is suppressed. Thus, the operating characteristics of the rotating electrical machine can be improved.

Embodiment 4 FIG.
FIG. 13 is an enlarged view of the main part showing the periphery of the magnetic teeth of the armature core in the rotary electric machine according to Embodiment 4 of the present invention.

In FIG. 13, the magnetic pole teeth 13 </ b> A uses a first magnetic pole tooth piece in which a shaft portion 25 e ′ having an elliptical cross section is formed on a protruding portion 25 d.
Other configurations are the same as those in the first embodiment.

In the armature core 11C according to the fourth embodiment, the shaft portion 25e ′ is inserted into the elongated hole portion 21a in a loosely fitted state, and the magnetic pole teeth 13A are positioned on the inner peripheral side of the back yoke 12 so that the first position and the second position are set. It is connected to the back yoke 12 so as to be reciprocally movable in the circumferential direction between the positions. Therefore, also in the fourth embodiment, the same effect as in the first embodiment can be obtained.

Here, the outer peripheral edge of the base portion 26a of the second pole tooth piece 26 is formed on a radius of curvature equal to the radius of curvature of the inner peripheral end surface of the second back yoke piece 21, a second back yoke piece 21 second An inevitable minute gap is formed between the two-pole teeth piece 26.
For example, in the first embodiment, the moving force of the magnetic pole teeth 13 is reduced to improve the mounting workability of the coil 15a, or the cost is reduced without increasing the processing accuracy of the long hole portion 21a and the shaft portion 25e. For the reason described above, when the fitting gap between the long hole portion 21a and the shaft portion 25e is increased, the shaft of the shaft portion 25e is formed by the gap formed between the second back yoke piece 21 and the second magnetic pole tooth piece 26. The magnetic teeth 13 are pivoted about the heart. The rotation of the magnetic teeth 13 induces variations in the position (posture) of the magnetic teeth 13 located at the second position , and deteriorates the operating characteristics of the rotating electrical machine.

In the fourth embodiment, since the shaft portion 25e ′ has an elliptical cross section, it is possible to suppress the rotation of the magnetic teeth 13A centered on the axis of the shaft portion 25e ′ shown by the arrow A in FIG. . Therefore, variations in the position (posture) of the magnetic teeth 13A located at the second position are suppressed, and the operating characteristics of the rotating electrical machine can be improved. Furthermore, since the fitting clearance between the long hole portion 21a and the shaft portion 25e can be increased, the moving force of the magnetic pole teeth 13 is reduced, and the mounting workability of the coil 15a is improved. Further, it is not necessary to excessively increase the processing accuracy of the long hole portion 21a and the shaft portion 25e ', and the cost can be reduced.

  In the fourth embodiment, the shaft portion having the circular cross section in the first embodiment is replaced with the shaft portion having the elliptical cross section. However, the shaft portion having the circular cross section in the second and third embodiments is replaced with the shaft having the elliptical cross section. The same effect can be obtained even if the part is changed.

Embodiment 5. FIG.
FIG. 14 is a plan view showing a rotary electric machine according to Embodiment 5 of the present invention, and FIG. 15 shows a first back yoke piece and first magnetic pole teeth constituting an armature core in the rotary electric machine according to Embodiment 5 of the present invention. FIG. 16 is a plan view showing the arrangement state of the second back yoke piece and the second magnetic pole tooth piece constituting the armature core in the rotary electric machine according to Embodiment 5 of the present invention. 17 is a view for explaining a method of mounting an armature coil on an armature core in a rotary electric machine according to Embodiment 5 of the present invention.

  In FIG. 14, the rotating electrical machine 101 is coaxial with the housing so as to surround the rotor 1 through a certain gap between the rotor 1 disposed in a housing (not shown) and the rotor 1. And an armature 40 held by the armature.

  The armature 40 is an electric machine in which magnetic pole teeth 43 project radially inward from the inner peripheral wall surface of the annular back yoke 42 and are arranged in a plurality of equiangular pitches in the circumferential direction, 24 in this case. An armature coil 15 composed of a core core 41, a coil 15a formed by winding a conductor wire around a slot 44 positioned on both sides of two magnetic pole teeth 43 continuous in the circumferential direction, An insulator (not shown) interposed between the core iron core 41 and the armature coil 15.

  As shown in FIGS. 15 and 16, the back yoke 42 includes annular first and second back yoke pieces 50 and 51 that are punched from an electromagnetic steel sheet. Then, 24 long hole portions 50a are formed at equiangular pitches in the circumferential direction on the inner circumferential side of the first back yoke piece 50, with the hole direction as the circumferential direction. A communication portion 50 b is formed in the first back yoke piece 50 so that each of the elongated hole portions 50 a communicates with the inner peripheral side of the first back yoke piece 50. Further, the punched caulking portions 50c are formed at an equiangular pitch on the outer peripheral side of the first back yoke piece 50 so as to be positioned between the long hole portions 50a. The punched caulking portions 51a are formed at an equiangular pitch on the outer peripheral side of the second back yoke piece 51, respectively. And when the 1st back yoke piece 50 and the 2nd back yoke piece 51 are piled up, the extraction caulking parts 50c and 51a overlap. Here, the hole shape of the long hole portion 50 a is configured such that both the inner peripheral side and the outer peripheral side edge portions extending in the circumferential direction are part of a cylindrical surface centering on the axis of the first back yoke piece 50. In addition, both end faces in the circumferential direction each have an arc shape formed by a part of a cylindrical surface having a distance (hole width) between both edges as a diameter.

  As shown in FIGS. 15 and 16, the magnetic pole teeth 43 are provided with first and second magnetic pole teeth pieces 55 and 56 punched from an electromagnetic steel plate. The first magnetic pole tooth piece 55 includes a base portion 55a, a flange portion 55b protruding from the tip of the base portion 55a to both sides in the circumferential direction, a punched caulking portion 55c formed at the center position of the base portion 55a, and a periphery of the base portion of the base portion 55a. The projection part 55d which protrudes to radial direction outward from the direction center, and the fitting part 55e which protrudes in the circumferential direction both sides from the protrusion end of the projection part 55d are provided. The second magnetic pole tooth piece 56 includes a base portion 56a, a flange portion 56b protruding from the tip of the base portion 56a to both sides in the circumferential direction, and a punched caulking portion 56c formed at the center position of the base portion 56a. The first magnetic pole tooth piece 55 is formed in the same outer shape as the second magnetic pole tooth piece 56 except for the protruding portion 55d and the fitting portion 55e. And when the 1st magnetic pole tooth piece 55 and the 2nd magnetic pole tooth piece 56 are piled up, the extraction caulking parts 55c and 56c overlap.

  Here, the fitting portion 55e is a cylinder whose inner peripheral side and outer peripheral side extending in the circumferential direction have a curvature radius substantially equal to the curvature radius of the inner peripheral side and the outer peripheral side of the long hole portion 50a. It is formed in the circular arc shape comprised in a part of surface, and the circumferential direction length is shorter than the long hole part 50a.

  In order to manufacture the armature core 41, first, the first back yoke piece 50 is disposed, and then, as shown in FIG. 15, the fitting portions 55e are inserted into the long hole portions 50a, respectively, 55a is protruded inward in the radial direction, and the first magnetic pole tooth pieces 55 are arranged on the inner peripheral side of the first back yoke piece 50 and flush with the first back yoke piece 50 at an equiangular pitch in the circumferential direction. To do. Next, the second back yoke piece 51 is disposed on the first back yoke piece 50. Further, the second magnetic pole tooth piece 56 is placed on each of the first magnetic pole tooth pieces 55 so as to be flush with the second back yoke piece 51. This operation is repeated as many times as necessary, and the laminated body of the first and second back yoke pieces 50 and 51 is fixed and integrated by fitting the crimping portions 50c and 51a, thereby forming the annular back yoke 42. In addition, the laminated body of the first and second magnetic pole teeth 55 and 56 is fixed and integrated by fitting the crimping portions 55c and 56c, so that the magnetic pole teeth 43 are formed.

  In the armature core 41 manufactured as described above, the fitting portion 55e is slidable in the elongated hole portion 50a in the hole direction of the elongated hole portion 50a, that is, in the circumferential direction. Therefore, the magnetic teeth 43 are between the first position where the fitting portion 55e contacts one end in the circumferential direction of the elongated hole portion 50a and the second position where the fitting portion 55e contacts the other circumferential end of the elongated hole portion 50a. It is attached to the back yoke 42 so as to be able to reciprocate. And when each fitting part 55e of the magnetic pole teeth 43 contacts the other circumferential end of the elongated hole part 50a, the gap between adjacent magnetic pole teeth 43, that is, the slot opening width is reduced. Further, when the fitting portion 55e of one magnetic pole tooth 43 comes into contact with one end in the circumferential direction of the elongated hole portion 50a, the gap between adjacent magnetic pole teeth 43, that is, the slot opening width is expanded.

Next, the insertion operation of the coil 15a will be described with reference to FIG. In FIG. 17, for convenience of explanation, a slot 44 located on one side of the two pole tooth 43 which circumferentially continuous and slots 44 _1, and a slot 44 located on the other side of the slot 44 _2, the slot 44 ₁ is a magnetic teeth 43 ₁ , the magnetic teeth 13 on the other circumferential side of the slot 44 ₁ are the magnetic teeth 43 ₂ , and the magnetic teeth 43 on the circumferential one side of the slots 44 ₂ are the magnetic teeth. and 43 _3, the magnetic teeth 43 of the circumferential other side slot 44 ₂ and the magnetic pole teeth 43 _4.

  First, the magnetic teeth 43 are slid so that the fitting portion 55e contacts the other circumferential end of the long hole portion 50a, and each of the magnetic teeth 43 is positioned at the second position. As a result, the slot opening width between adjacent magnetic pole teeth 43 is reduced. Each of the coils 15a is produced by winding a conductor wire a plurality of times in a ring shape.

Then, in the respective slots ₄₄ 1, 44 ₂ located on either side of the two pole tooth 43 which circumferentially continuous, as the fitting portion 55e is in contact with one circumferential end of the long hole 50a, the slot ₄₄ 1, 44 pole tooth 43 1 located in the one circumferential side of the _2, 43 ₃ is slid to the first position, to enlarge the slot opening width. Then, the conductor wire bundle of the coil 15a is inserted into the slots 44 ₁ and 44 ₂ from the enlarged slot opening. Then, the slot ₄₄ 1, 44 pole teeth ₄₃ 1 located in the one circumferential side of the _2, 43 ₃ is returned to the second position is slid, one coil 15a is attached to the armature core 41. This operation is repeated, and the coils 15a are attached to the armature core 41 one by one while being even one slot pitch counterclockwise in FIG.

Here, when the third and subsequent coils 15a are attached to the armature core 41, the slots 44 ₁ positioned on one side of the _two magnetic pole teeth 43 ₂ and 43 _{3 that} are continuous in the circumferential direction have other coils 15a. Although conductor wire bundles is not inserted, the conductor wire bundles of the other coil 15a is inserted into slot 44 ₂ located on the other side in the circumferential direction in successive two pole tooth 43 _2, 43 _3. The slot 44 ₁ to conductor wire bundles of the other coil 15a is not inserted, it is easy to insert the conductor wire bundles of the coil 15a. However, the slot 44 ₂ to conductor wire bundles of the other coil 15a is inserted, the insertion of the conductor wire bundles of the coil 15a becomes difficult.

In the fifth embodiment, by sliding the pole teeth ₄₃ 1, 43 ₃ located in the slot ₄₄ 1, 44 ₂ in the one circumferential side to the first position, after the enlarged slot opening width, the conductor wire bundles of the coil 15a the so inserted into the slots ₄₄ 1, 44 _2, also the slot 44 ₂ conductor wire bundles of the other coil 15a is inserted, it can be easily inserted the conductor wire bundles of the coil 15a. Also, after inserting the conductor wire bundles of the coils 15a in slot 44 _2, so returning the pole tooth 43 ₃ to the second position, the magnetic pole teeth 43 ₄ is pressed against the second position, the fitting portion of the magnetic teeth 43 ₄ 55e There abuts the circumferential direction end of the long hole 50a, the magnetic pole teeth 43 ₄ is positioned and fixed to the second position.

  As described above, according to the fifth embodiment, the back yoke 42 is manufactured by stacking the first and second back yoke pieces 50 and 51 that are annularly punched, and the magnetic pole teeth 43 are formed on the inner periphery of the back yoke 42. It is connected to the back yoke 42 so as to reciprocate in the circumferential direction between the first position and the second position. Therefore, the magnetic pole teeth 43 located on one side of the slot 44 in which the conductor wire bundle is inserted is moved to the first position, the slot opening width is enlarged, and the conductor electric flux of the coil 15a is expanded from the enlarged slot opening to the slot. 44, the coil 15a can be easily mounted on the armature core 41, and the mounting workability of the coil 15a is improved. As a result, the coil 15a can be easily aligned and inserted into the slot 44, the space factor can be improved, and the operating characteristics of the rotating electrical machine 101 can be improved.

Without changing or moving the back yoke 42, the slot opening width can be increased only by moving the magnetic teeth 43 in the circumferential direction, and the workability of inserting the coil 15a into the slot 44 can be improved. Therefore, the same effect can be obtained for the armature core 41 having a large diameter or a large number of layers only by requiring less energy.
Since the back yoke 42 is formed by laminating and integrating the annular first and second back yoke pieces 50 and 51, the roundness can be increased and the operating characteristics of the rotating electrical machine 101 can be improved. Further, since it is not necessary to return the armature core 41 to an annular shape after the mounting of the coil 15a to the armature core 41 is completed, the roundness of the armature core 41 can be ensured with high accuracy.

  Furthermore, in the fifth embodiment, since the process of increasing the rigidity required in the conventional armature core structure configured by connecting a plurality of divided laminated cores in an endless manner is unnecessary, the number of work steps can be reduced. In addition, the cost can be reduced.

  In the fifth embodiment, the armature core 41 includes a set of the first back yoke piece 50 and the first magnetic pole tooth piece 55 and a set of the second back yoke piece 51 and the second magnetic pole tooth piece 56 alternately. However, the armature core is not limited to this configuration. For example, the armature core has at least one laminated body of a set of the first back yoke piece 50 and the first magnetic pole tooth piece 55 and remains. The laminated portion may be formed of a laminated body of a set of the second back yoke piece 51 and the second magnetic pole tooth piece 56.

Embodiment 6 FIG.
FIG. 18 is a view for explaining the movement operation of the magnetic teeth of the armature core in the rotary electric machine according to Embodiment 6 of the present invention. FIG. 18 (a) shows the state where the magnetic teeth are located at the second position. FIG. 18B shows a state in which one magnetic pole tooth is located at the first position. In FIG. 18, the second back yoke piece and the second magnetic pole tooth piece located at one end of the armature core are omitted for convenience.

  In FIG. 18, the first back yoke piece 52 is punched in an annular shape from a magnetic steel sheet, and the arc-shaped long hole portions 52 a are respectively formed on the inner peripheral side of the first back yoke piece 52 with the hole direction as the circumferential direction. Twenty-four are formed at equiangular pitches in the circumferential direction. A communication portion 52 b is formed in the first back yoke piece 52 so that each of the elongated hole portions 52 a communicates with the inner peripheral side of the first back yoke piece 52. Further, the punched caulking portions 52c are formed at an equiangular pitch on the outer peripheral side of the second back yoke piece 52 so as to be positioned between the long hole portions 52a. Furthermore, the convex part 52d is formed so that the both ends of the circumferential direction of the edge part of the outer peripheral side extended in the circumferential direction of the long hole part 52a may protrude in the inner peripheral side.

  The first magnetic pole tooth piece 57 includes a base portion 57a, a flange portion 57b protruding from the tip of the base portion 57a to both sides in the circumferential direction, a punched caulking portion 57c formed at the center position of the base portion 57a, and a periphery of the base portion of the base portion 57a. A protrusion 57d that protrudes radially outward from the center in the direction, an arc-shaped fitting portion 57e that protrudes from the protruding end of the protrusion 57d to both sides in the circumferential direction, and an outer peripheral edge of the fitting portion 57e. A recess 57f. The concave portion 57f accommodates the convex portion 52d and releases the press-fitting when the fitting portion 57e contacts one end in the circumferential direction of the elongated hole portion 52a, and the fitting portion 57e contacts the other circumferential end of the elongated hole portion 52a. It is sometimes formed on the outer peripheral edge of the fitting portion 57e so as to accommodate the convex portion 52d and release the press-fitting.

The first back yoke piece 52 is configured in the same manner as the first back yoke piece 50 in the fifth embodiment except that the convex portion 52d is formed. Further, the first magnetic pole tooth piece 57 is configured in the same manner as the first magnetic pole tooth piece 55 in the fifth embodiment except that the concave portion 57f is formed.
In the sixth embodiment, except that the first back yoke piece 52 and the first magnetic pole tooth piece 57 are used in place of the first back yoke piece 50 and the first magnetic pole tooth piece 55, the above embodiment is described. This is the same as in FIG.

  In the armature core 41A according to the sixth embodiment, the set of the first back yoke piece 52 and the first magnetic pole tooth piece 57 and the set of the second back yoke piece 51 and the second magnetic pole tooth piece 56 are alternately stacked. It is configured. And when the 1st back yoke piece 52 and the 2nd back yoke piece 51 are piled up, extraction caulking parts 52c and 51a overlap, and the layered product of the 1st and 2nd back yoke pieces 52 and 51 is unified, The back yoke 42A is produced. Further, the laminated body of the first and second magnetic pole teeth pieces 57 and 56 is integrated by fitting the caulking portions 57c and 56c to produce the magnetic pole teeth 43A. And the protrusion part 57d of the 1st magnetic pole teeth piece 57 is inserted in the communication part 52b, and the fitting part 57e is inserted in the long hole part 52a in a loose-fit state.

In the sixth embodiment, the back yoke 42A is manufactured by stacking the first and second back yoke pieces 52, 51 that are annularly punched, and the magnetic pole teeth 43A are positioned on the inner peripheral side of the back yoke 42A. It is connected to the back yoke 42A so as to be reciprocally movable in the circumferential direction between the first position and the second position. Therefore, in the sixth embodiment, the same effect as in the fifth embodiment can be obtained.

In the sixth embodiment, the convex portion 52d is formed so as to project both ends in the circumferential direction of the outer peripheral edge extending in the circumferential direction of the long hole portion 52a to the inner peripheral side, and the hole width (diameter) of the long hole portion 52a. (Direction width) is narrow at the position of the convex portion 52d. Accordingly, the fitting portion 57e slides and moves to one side in the circumferential direction along the hole direction of the elongated hole portion 52a, elastically deforms the convex portion 52d outward in the radial direction, and climbs over the convex portion 52d. As shown in (b), it is located at the first position in contact with one end of the slot 52a. At this time, the convex portion 52d is housed in the concave portion 57f, and the press-fitting is released.
Further, the fitting portion 57e is slid to the other side in the circumferential direction along the hole direction of the long hole 52a, over the protruding portion 52 d by elastically deforming the protrusions 52 d in the radially outward FIG As shown in FIG. 18A, it is located at the second position in contact with the other end of the long hole portion 52a. At this time, the convex portion 52 d is accommodated in the recess 57f, the press-fitting is released.

  Here, in order for the fitting part 57e to get over the convex part 52d, a force for elastically deforming the convex part 52d is required, so the fitting part 52e, that is, the magnetic teeth 43A is positioned and held at the first position and the second position. Is done. In addition, the force over the convex part 52d can be set by adjusting the protrusion amount of the convex part 52d.

  According to the sixth embodiment, the magnetic teeth 43A can be easily and accurately positioned and held at the first position and the second position, so that the armature manufacturing process can be reduced and the variation in the positions of the magnetic teeth 43A is suppressed. Thus, the operating characteristics of the rotating electrical machine can be improved.

  Here, in the sixth embodiment, the auxiliary hole is formed in the first back yoke piece 52 so as to face the elongated hole portion 52a across the convex portion 52d, and the convex portion 52d is configured to be thin, and the fitting portion The convex portion 52d may be easily elastically deformed during the press-fitting of 57e.

  In the sixth embodiment, the armature core 41A includes the first back yoke piece 52 and the first magnetic pole tooth piece 57, and the second back yoke piece 51 and the second magnetic pole tooth piece 56 alternately. However, the armature core is not limited to this configuration. For example, the armature core has at least one laminated body of a set of the first back yoke piece 52 and the first magnetic pole tooth piece 57, and remains. The laminated portion may be formed of a laminated body of a set of the second back yoke piece 51 and the second magnetic pole tooth piece 56.

Embodiment 7 FIG.
FIG. 19 is a plan view of relevant parts showing the vicinity of the magnetic teeth of the armature core in the rotary electric machine according to Embodiment 7 of the present invention. In FIG. 19, for convenience, the second back yoke piece and the second magnetic pole tooth piece located at one end of the armature core are omitted.

  In FIG. 19, the first back yoke piece 53 is punched out from the magnetic steel sheet in an annular shape, and the protrusions 53 a protrude radially inward from the inner peripheral end of the first back yoke piece 53, respectively. 24 are formed at an equiangular pitch. Arc-shaped fitting portions 53b are formed so as to protrude from both protruding ends of the protruding portion 53a to both sides in the circumferential direction. The extraction caulking portions 53c are formed at equiangular pitches on the outer peripheral side of the first back yoke piece 53 so as to be positioned between the fitting portions 53b. The first magnetic pole tooth piece 58 is punched from an electromagnetic steel plate, and has a base portion 58a, a flange portion 58b protruding from the tip of the base portion 58a on both sides in the circumferential direction, a punched caulking portion 58c formed at the center position of the base portion 58a, and a base portion An arc-shaped elongated hole portion 58d formed at a circumferential center position on the root portion side of 58a, and a communication portion 58e that communicates the elongated hole portion 58d outward of the root portion.

  In the seventh embodiment, the first embodiment is used except that the first back yoke piece 53 and the first magnetic pole tooth piece 58 are used instead of the first back yoke piece 50 and the first magnetic pole tooth piece 55. This is the same as in FIG.

  In the armature core 41B according to the seventh embodiment, the set of the first back yoke piece 53 and the first magnetic pole tooth piece 58 and the set of the second back yoke piece 51 and the second magnetic pole tooth piece 56 are alternately stacked. It is configured. And when the 1st back yoke piece 53 and the 2nd back yoke piece 51 are piled up, extraction caulking parts 53c and 51a overlap, and the layered product of the 1st and 2nd back yoke pieces 53 and 51 is unified, The back yoke 42B is produced. Further, the laminated body of the first and second magnetic pole tooth pieces 58 and 56 is integrated by fitting the caulking portions 58c and 56c, thereby producing the magnetic pole teeth 43B. And the projection part 53a of the 1st back yoke piece 53 is inserted in the communication part 58e, and the fitting part 53b is inserted in the long hole part 58d in a loose fitting state. The fitting portion 53b is in contact with one end of the elongated hole portion 58d in the circumferential direction, the magnetic pole teeth 43B are positioned at the first position, and the fitting portion 53b is in contact with the other circumferential end of the elongated hole portion 58d. 43B is located at the second position.

In the seventh embodiment, the back yoke 42B is manufactured by stacking the first and second back yoke pieces 53, 51 that are annularly punched, and the magnetic pole teeth 43B are positioned on the inner peripheral side of the back yoke 42B. It is connected to the back yoke 42B so as to be reciprocally movable in the circumferential direction between the first position and the second position. Therefore, also in Embodiment 7, the same effect as in Embodiment 5 can be obtained.

  Here, in the seventh embodiment, the convex portion is formed so as to project both ends in the circumferential direction of the inner peripheral edge extending in the circumferential direction of the long hole portion 58d to the outer peripheral side, and the fitting portion 53b is a long hole. The convex portion is accommodated to release press-fitting when it contacts one circumferential end of the portion 58d, and the convex portion is accommodated to release press-fit when the fitting portion 53b contacts the other circumferential end of the elongated hole portion 58d. In this way, a recess may be formed on the inner peripheral edge of the fitting portion 53b. In this case, as in the sixth embodiment, the magnetic teeth 43B can be easily and accurately positioned and held at the first position and the second position. Further, the auxiliary hole is formed in the first magnetic pole tooth piece 58 so as to be opposed to the elongated hole portion 58d across the convex portion, and the convex portion is configured to be thin, and the convex portion is elastically deformed when the fitting portion 53d is press-fitted. You may make it easy to do.

  In the seventh embodiment, the armature core 41B includes a set of the first back yoke piece 53 and the first magnetic pole tooth piece 58 and a set of the second back yoke piece 51 and the second magnetic pole tooth piece 56 alternately. However, the armature core is not limited to this configuration. For example, the armature core has at least one laminated body of the first back yoke piece 53 and the first magnetic pole tooth piece 58 and remains. The laminated portion may be formed of a laminated body of a set of the second back yoke piece 51 and the second magnetic pole tooth piece 56.

Embodiment 8 FIG.
FIG. 20 is a plan view showing an armature core in a rotary electric machine according to Embodiment 8 of the present invention, and FIG. 21 shows a first back yoke piece constituting the armature core in the rotary electric machine according to Embodiment 8 of the present invention, and FIG. 22 is an essential part plan view showing an arrangement state of the first magnetic pole tooth pieces, and FIG. 22 is an arrangement state of the second back yoke piece and the second magnetic pole tooth piece constituting the armature core in the rotary electric machine according to Embodiment 8 of the present invention. It is a principal part top view which shows.

In FIG. 20, an armature core 61 includes an annular back yoke 62 and 24 magnetic poles that protrude radially inward from the inner peripheral wall surface of the back yoke 62 and are arranged at equiangular pitches in the circumferential direction. Teeth 63.

  As shown in FIGS. 21 and 22, the back yoke 62 includes annular first and second back yoke pieces 70 and 71 that are punched from an electromagnetic steel plate. Then, each of the shaft sections 70a having a circular cross section protrudes from one surface of the first back yoke piece 70 and is formed in the circumferential direction at an equiangular pitch on the inner peripheral side of the first back yoke piece 70. The punched caulking portions 70b are respectively positioned between the shaft portions 70a and formed on the outer peripheral side of the first back yoke piece 70 at an equiangular pitch. The cutout portions 71a are opened to the inner peripheral side, and are formed in the second back yoke piece 71 at the same number as the shaft portion 70a at an equiangular pitch in the circumferential direction. The punched caulking portions 71b are respectively formed between the cutout portions 71a and formed at an equiangular pitch on the outer peripheral side of the second back yoke piece 71. And when the 1st back yoke piece 70 and the 2nd back yoke piece 71 are piled up, extraction caulking part 70b, 71b overlaps.

  As shown in FIGS. 21 and 22, the magnetic pole teeth 63 include first and second magnetic pole teeth pieces 75 and 76 punched from an electromagnetic steel plate. The first magnetic pole tooth piece 75 includes a base portion 75a, a flange portion 75b protruding from the tip of the base portion 75a to both sides in the circumferential direction, and a punched caulking portion 75c formed at the center position of the base portion 75a. The second magnetic pole teeth piece 76 includes a base portion 76a, a flange portion 76b projecting from the tip of the base portion 76a to both sides in the circumferential direction, a punched caulking portion 76c formed at a central position of the base portion 76a, and a base portion side of the base portion 76a. An arc-shaped elongated hole portion 76d formed at the center in the circumferential direction. And when the 1st magnetic pole tooth piece 75 and the 2nd magnetic pole tooth piece 76 are piled up, the extraction caulking part 75c, 76c overlaps.

  Here, the bottom portion extending in the circumferential direction of the notch 71a is formed in an arc shape centering on the axis of the second back yoke piece 71, and the base side end portion of the base portion 76a is substantially equal to the bottom portion of the notch 71a. It is formed in an arc shape with a radius of curvature. Furthermore, the circumferential width of the base side end of the base portion 76a is shorter than the circumferential width of the notch 71a.

  In order to manufacture the armature core 61, first, as shown in FIG. 21, the first back yoke piece 70 is disposed, and the first magnetic pole tooth piece 75 is disposed on the inner peripheral side of the first back yoke piece 70, and The first back yoke piece 70 and the first back yoke piece 70 are flush with each other at an equiangular pitch in the circumferential direction. Next, the second back yoke piece 71 is disposed on the first back yoke piece 70. Further, as shown in FIG. 22, the second magnetic pole teeth piece 76 is overlaid on each of the first magnetic pole teeth pieces 75 so that the shaft portion 70 a is inserted into the elongated hole portion 76 d, and the second back yoke. Arranged flush with the piece 71. This operation is repeated as many times as necessary, and the laminated body of the first and second back yoke pieces 70, 71 is fixed and integrated by fitting the crimping portions 70b, 71b, thereby forming an annular back yoke 62. Further, the laminated body of the first and second magnetic pole tooth pieces 75 and 76 is fixed and integrated by fitting the crimping portions 75c and 76c to form the magnetic pole teeth 63.

  In the armature core 61 thus manufactured, the shaft portion 70a is inserted into the elongated hole portion 76d, and the magnetic pole teeth 63 are slidable in the circumferential direction. Therefore, the magnetic teeth 63 reciprocate between a first position where the shaft portion 70a is in contact with the other circumferential end of the elongated hole portion 76d and a first position where the shaft portion 70a is in contact with one circumferential end of the elongated hole portion 76d. It is attached to the back yoke 62 as possible. When one end in the circumferential direction of each elongated hole portion 76d of the magnetic pole teeth 63 comes into contact with the shaft portion 70a, a gap between adjacent magnetic pole teeth 63, that is, a slot opening width is reduced. Further, when the other circumferential end of the elongated hole portion 76d of one magnetic pole tooth 63 is in contact with the shaft portion 70a, a gap between adjacent magnetic pole teeth 63, that is, a slot opening width is expanded.

  Also in the eighth embodiment, similarly to the first embodiment, the coil 15a inserts the conductor wire bundle into each of the slots 64 positioned on both sides of the two magnetic pole teeth 63 that are continuous in the circumferential direction. Attached to the iron core 61. Then, the coil 15a is attached to the armature core 61, for example, counterclockwise even by one slot pitch.

  According to the eighth embodiment, the back yoke 62 is produced by laminating the first and second back yoke pieces 70 and 71 that are annularly punched, and the magnetic teeth 63 are located on the inner peripheral side of the back yoke 62. The back yoke 62 is connected to the first position and the second position so as to reciprocate in the circumferential direction. Therefore, the magnetic teeth 63 positioned on one side of the slot 64 in which the conductor wire bundle is inserted are moved to the first position, the slot opening width is expanded, and the conductor electric flux of the coil 15a is expanded from the expanded slot opening to the slot. 64, the coil 15a can be easily mounted on the armature core 61, and the mounting workability of the coil 15a is improved. As a result, the coil 15a can be easily inserted into the slot 64 in an aligned manner, the space factor can be improved, and the operating characteristics of the rotating electrical machine can be improved.

The slot opening width can be expanded only by moving the magnetic teeth 63 in the circumferential direction without deforming and moving the back yoke 62, and the workability of inserting the coil 15a into the slot 64 can be improved. Therefore, the same effect can be obtained for the armature core 61 having a large diameter or a large number of layers only by requiring less energy.
Since the back yoke 62 is formed by laminating and integrating the annular first and second back yoke pieces 70 and 71, the roundness can be increased and the operating characteristics of the rotating electrical machine can be improved. Further, since it is not necessary to return the armature core 61 to an annular shape after the mounting of the coil 15a to the armature core 61 is completed, the roundness of the armature core 61 can be ensured with high accuracy.

  Furthermore, in the eighth embodiment, since the process of increasing the rigidity required in the conventional armature core structure configured by connecting a plurality of divided laminated cores in an endless manner is unnecessary, the number of work steps can be reduced. In addition, the cost can be reduced.

  In the eighth embodiment, the armature core 61 includes a set of the first back yoke piece 70 and the first magnetic pole tooth piece 75 and a set of the second back yoke piece 71 and the second magnetic pole tooth piece 76 alternately. However, the armature core does not have to be composed of only the first and second back yoke pieces 70 and 71 and the first and second magnetic pole tooth pieces 75 and 76, but the first back yoke. It suffices to have at least one laminate of a set of the piece 70 and the first magnetic pole tooth piece 75 and a set of the second back yoke piece 71 and the second magnetic pole tooth piece 76.

  For example, an annular third back yoke piece and a first magnetic pole tooth piece 75 punched from an electromagnetic steel sheet are prepared. The third back yoke piece is manufactured in the same manner as the first back yoke piece 70 except that the shaft portion 70a is omitted. A part of the laminated portion constituting the armature core is constituted by laminating the first and second back yoke pieces 70 and 71 and the first and second magnetic pole tooth pieces 75 and 76 to constitute the armature core. The remaining laminated portion may be constituted by laminating the third back yoke piece and the first magnetic pole tooth piece 75. In this case, since the proportion of the notch 71a in the back yoke is reduced and the amount of iron constituting the armature core can be increased, the operating characteristics of the rotating electrical machine can be improved, for example, the efficiency of the motor can be improved.

Also in the eighth embodiment, as in the second embodiment, the convex portions protrude on the outer peripheral side at both ends in the circumferential direction of the inner peripheral side or outer peripheral side of the elongated hole portion 76d in the circumferential direction. The hole width (diameter width) of the long hole portion 76d may be narrowed at the position of the convex portion. Further, as in the third embodiment, auxiliary holes may be formed on the inner peripheral side or the outer peripheral side of the convex portion of the second magnetic pole piece 76 to make the convex portion thin.
In the eighth embodiment, the shaft portion 70a is formed in a circular cross section. However, as in the fourth embodiment, the shaft portion may be a shaft portion having an elliptical cross section.

In each of the above embodiments, the rotating electric machine is described with 10 poles and 24 slots, but the number of pole slots is not limited to this.
In each of the above embodiments, the armature core in which the magnetic teeth protrude from the inner peripheral surface of the annular back yoke radially inward has been described. However, in the present invention, the magnetic teeth are annular. The same effect can be obtained even when applied to an armature core projecting radially outward from the outer peripheral surface of the back yoke.

  In each of the above embodiments, the coils are arranged at a pitch of 1 slot in the circumferential direction and attached to the armature core. However, the arrangement pitch of the coils is not limited to a pitch of 1 slot. They may be arranged with an arrangement pitch of 2 slots or more, or with a plurality of arrangement pitches.

Claims (15)

An annular back yoke, and an armature core of a rotating electrical machine having a plurality of magnetic pole teeth that are arranged in the circumferential direction so as to protrude to one radial direction of the back yoke,
The back yoke is configured by laminating and integrating annular back yoke pieces,
Each of the plurality of magnetic pole teeth is configured by laminating and integrating magnetic pole teeth pieces, and is coupled to the back yoke so as to be reciprocally movable in a circumferential direction between a first position and a second position that are separated in the circumferential direction. An armature core of a rotating electric machine characterized by The back yoke piece includes at least a first back yoke piece in which the number of notches opened on one side in the radial direction is formed in the circumferential direction with the same number as the magnetic teeth, and an arc shape having the hole direction as the circumferential direction. The second back yoke is formed so as to have the same number of the elongated hole portions as the cutout portions at an equiangular pitch in the circumferential direction, and the elongated hole portions are positioned in the cutout portions and are superposed on the first back yoke piece. And having a piece,
Each of the magnetic teeth pieces has at least a first base, a protrusion formed at one end in the length direction of the first base, and a shaft formed on one surface of the protrusion. Fit into the elongated hole, place the protrusion in the notch, and project the first base from the first back yoke piece in the radial direction, flush with the first back yoke piece. a first pole tooth piece being disposed, respectively, are formed on the same outer shape as the first base portion, and a second pole tooth piece superimposed on the first base Ru is disposed in the second back yoke piece flush Have
The magnetic pole teeth slide the shaft portion in the elongated hole portion, the shaft portion is in contact with one circumferential end of the elongated hole portion and is positioned at the first position, and the shaft portion is the elongated hole portion. The armature core of a rotating electrical machine according to claim 1, wherein the armature core is configured to be in contact with the other circumferential end of the first and second positions. The second back yoke piece has convex portions that narrow the hole width of the long hole portion on one side in the radial direction of the long hole portion or on both sides in the circumferential direction,
While the magnetic teeth are moving in the circumferential direction, the shaft portion is press-fitted into the convex portion, and then the press-fitting of the shaft portion is released so as to be positioned at the first position or the second position. The armature core of the rotating electrical machine according to claim 2, wherein the armature core is configured.   An auxiliary hole is formed in the second back yoke piece so as to face the elongated hole portion with the convex portion interposed therebetween, and is configured to elastically deform the convex portion when the shaft portion is press-fitted. The armature core of the rotary electric machine according to claim 3, The back yoke piece includes at least a first back yoke piece having a shaft portion formed in the circumferential direction at an equiangular pitch and the same number as the magnetic pole teeth, and a notch portion opened to one side in the radial direction at an equiangular pitch in the circumferential direction. And the second back yoke piece that is formed in the same number as the shaft portion, and is disposed to overlap the first back yoke piece with the shaft portion positioned in the notch portion,
Each of the magnetic teeth pieces has at least a first base portion, and the first base portion is positioned on one radial side of each of the shaft portions, and on the one radial direction side of the first back yoke piece, And a first magnetic pole tooth piece disposed flush with the first back yoke piece, a second base part, and an arc-shaped elongated hole part formed on the other radial side of the second base part, respectively. The other side in the radial direction of the second base portion is positioned in the notch portion, the shaft portion is fitted into the elongated hole portion, and the second base portion is overlapped with the first base portion to face the second back yoke piece. and a second pole tooth piece that will be placed on one,
The magnetic pole teeth are slid with the shaft portion as a guide so that the shaft portion is in contact with the other circumferential end of the elongated hole portion and is positioned at the first position, and the shaft portion is in contact with the elongated hole portion. The armature core of a rotating electrical machine according to claim 1, wherein the armature core is configured to be in contact with one end in the circumferential direction and located at the second position. The second magnetic pole tooth piece has a convex portion that narrows the hole width of the long hole portion on one side in the radial direction of the long hole portion or on both sides in the circumferential direction,
While the magnetic teeth are moving in the circumferential direction, the shaft portion is press-fitted into the convex portion, and then the press-fitting of the shaft portion is released so as to be positioned at the first position or the second position. The armature core of the rotating electrical machine according to claim 5, wherein the armature core is configured. An auxiliary hole is formed in the second magnetic pole tooth piece so as to face the elongated hole portion across the convex portion, and is configured to elastically deform the convex portion when the shaft portion is press-fitted. The armature core of the rotating electric machine according to claim 6,   The armature core of a rotating electrical machine according to any one of claims 2 to 7, wherein the shaft portion has an elliptical cross section. The back yoke piece has at least the same number of arc-shaped elongated hole portions as the circumferential direction in the hole direction and the same number of the magnetic teeth as the circumferential direction, and the communicating portion is on the radial side of the elongated hole portion. A first back yoke piece formed so as to open to the first back yoke piece, and a second back yoke piece arranged to overlap the first back yoke piece and covering the elongated hole part and the communication part,
Each of the magnetic pole teeth has at least a first base, a protrusion formed at one end in the length direction of the first base, and an arc-shaped fitting portion protruding from one end of the protrusion to both sides in the circumferential direction. The fitting portion is fitted into the elongated hole portion, the projection portion is positioned in the communication portion, and the first base portion is protruded from the first back yoke piece to one side in the radial direction. A first magnetic pole tooth piece that is arranged flush with the back yoke piece, is formed in the same outer shape as the first base part, and is arranged flush with the second back yoke piece so as to overlap the first base part. A second magnetic pole tooth piece,
The magnetic teeth slide the fitting portion in the elongated hole portion, the fitting portion is in contact with one end in the circumferential direction of the elongated hole portion and is positioned at the first position, and the fitting portion is The armature core of a rotating electrical machine according to claim 1, wherein the armature core is configured to be in contact with the other circumferential end of the elongated hole portion and located at the second position. The first back yoke piece has convex portions that narrow the hole width of the long hole portion on both sides in the circumferential direction on the other radial side of the long hole portion,
The first magnetic pole tooth piece accommodates the convex portion when the magnetic pole tooth is located at the first position, and the convex portion when the magnetic pole tooth is located at the second position. In order to house, it has a recess formed on each of both sides in the circumferential direction on the other radial side of the fitting part,
While the magnetic teeth are moving in the circumferential direction, the fitting portion is press-fitted into the convex portion, and then the convex portion is housed in the concave portion, so that the press-fitting of the fitting portion is released, and the first The armature core of the rotating electric machine according to claim 9, wherein the armature core is configured to be located at one position or the second position.   An auxiliary hole is formed in the first back yoke piece so as to face the elongated hole portion across the convex portion, and is configured to elastically deform the convex portion when the fitting portion is press-fitted. The armature core of the rotating electrical machine according to claim 10. The back yoke piece has at least protrusions protruding in one radial direction at an equal pitch in the circumferential direction and the same number as the magnetic teeth, and arc-shaped fitting parts from one end of the protrusion to both sides in the circumferential direction. has a first back yoke piece formed so as to protrude, and a second back yoke piece that will be disposed to overlap with the first back yoke piece,
The magnetic pole tooth pieces include at least a first base, an arc-shaped long hole formed on one end in the length direction of the first base, and one end of the long hole and the first base, respectively. The fitting portion is fitted into the elongated hole portion, the projection portion is positioned in the communication portion, and the first base portion projects from the first back yoke piece to one side in the radial direction. The first back yoke piece is formed in the same outer shape as the first base, and the second back yoke piece is formed so as to overlap the first base. and a second pole tooth piece that will be located flush with,
The magnetic teeth are slid with the fitting portion as a guide so that the fitting portion is in contact with the other circumferential end of the elongated hole portion and positioned at the first position, and the fitting portion is the long piece. The armature core of the rotating electrical machine according to claim 1, wherein the armature core is configured to be in contact with one end in the circumferential direction of the hole and located at the second position. The first magnetic pole tooth piece has convex portions that narrow the hole width of the long hole portion on both sides in the circumferential direction on one side in the radial direction of the long hole portion,
The first back yoke piece houses the convex portion when the magnetic pole teeth are located at the first position, and the convex portion when the magnetic pole teeth are located at the second position. In order to house, it has a recess formed in each of the circumferential side on one side in the radial direction of the fitting portion,
While the magnetic teeth are moving in the circumferential direction, the fitting portion is press-fitted into the convex portion, and then the convex portion is housed in the concave portion, so that the press-fitting of the fitting portion is released, and the first The armature core of the rotating electrical machine according to claim 12, wherein the armature core is configured to be located at one position or the second position.   An auxiliary hole is formed in the first magnetic pole tooth piece so as to face the elongated hole portion across the convex portion, and is configured to elastically deform the convex portion when the fitting portion is press-fitted. The armature core of the rotary electric machine according to claim 13. An annular back yoke, and a plurality of magnetic pole teeth arranged in the circumferential direction, each projecting to one side in the radial direction of the back yoke and coupled to the back yoke so as to be capable of reciprocating in the circumferential direction Armature core,
A rotating electrical machine having an armature coil that is inserted into two slots located on both sides of the plurality of magnetic pole teeth that are continuous in the circumferential direction, and includes a plurality of coils arranged in the circumferential direction on the armature core. A method of manufacturing an armature of
The magnetic pole teeth positioned on both sides of the slot into which the coil is inserted are moved away from each other to increase the slot opening width, and the coil is inserted into the slot from the enlarged slot opening, and then the magnetic pole is inserted. An armature coil that sequentially mounts the coil on the armature core in the order of arrangement in the circumferential direction of the coil by repeating the coil mounting process of mounting the coil by reducing the slot opening width by moving the teeth in the adjacent direction. A method of manufacturing an armature for a rotating electrical machine having a mounting step.

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