JP6793853B2 - Manufacturing method of armature core of rotary electric machine, core block connection, and armature core of rotary electric machine - Google Patents

Description

The present invention relates to an armature core of a rotary electric machine, a core block connector, and a method of manufacturing an armature core of a rotary electric machine included in a rotary electric machine used as a motor, a generator, or the like.

Conventionally, an armature iron core of a motor in which a plurality of core blocks arranged in an annular shape are rotatably connected to each other is known (see, for example, Patent Document 1).

Japanese Patent No. 3279279

However, in the armature core of the conventional motor shown in Patent Document 1, since two core blocks adjacent to each other are rotatably connected to each other, the shape of the armature core can be kept in an annular shape. Have difficulty. Therefore, in the conventional motor, it is necessary to fit the armature core on the inner surface of the cylindrical housing to keep the shape of the armature core in an annular shape. Therefore, with the conventional motor, not only is it time-consuming to manufacture the motor, but it is also impossible to reduce the cost.

The present invention has been made to solve the above-mentioned problems, and is capable of improving productivity and reducing costs. Armature core and core block connector of a rotary electric machine. The purpose is to obtain a method for manufacturing an armature core of a rotary electric machine.

The armature core of a rotary electric machine according to the present invention includes one or more core block connectors having a plurality of core blocks, each of the plurality of core blocks having a back yoke and a tooth protruding from the back yoke. One or more core block connectors are arranged in an annular shape with the teeth radially inward in a state where the back yokes are sequentially connected to each other, and one or more core block connectors are each of a plurality of core pieces. One or more first core piece array layers arranged as a first core piece, and one or more second core piece array layers in which each of a plurality of core pieces is arranged as a second core piece are laminated. Each of the plurality of core blocks is formed by stacking a first core piece and a second core piece, and two core blocks adjacent to each other in one or more core block connections. The core blocks are connected to each other by a rotary connecting portion, and in the rotary connecting portion, the connecting side end of the first core piece of one core block and the connecting side end of the second core piece of the other core block are connected. The portions overlap each other, and the connecting side ends of the first core piece and the second core piece are rotatably connected to each other about the connecting axis, and are adjacent to each other in the first core piece array layer. A first notch open to the side opposite to the teeth side is formed between the two matching first core pieces, and the first notch is connected to each other by a rotary connecting portion. A first welded portion for fixing the two core blocks to each other is provided.

Further, the core block connector according to the present invention includes a plurality of core blocks each having a back yoke and a tooth protruding from the back yoke, and a core block connection in which the back yokes of the plurality of core blocks are sequentially connected to each other. In the body, the core block connector is composed of one or more first core piece array layers in which each of the plurality of core pieces is arranged as the first core piece, and each of the plurality of core pieces as the second core piece. It is configured by stacking one or more second core piece array layers that are lined up, and each of the plurality of core blocks is configured by stacking the first core piece and the second core piece. Two core blocks adjacent to each other are connected by a rotary connecting portion, and in the rotary connecting portion, the connecting side end of the first core piece of one core block and the other core block. The connecting side ends of the second core piece overlap each other, and the connecting side ends of the first core piece and the second core piece are rotatably connected to each other about the connecting shaft. A first notch as a groove for welding is formed between the two first core pieces adjacent to each other in the core piece array layer 1 so as to be open to the side opposite to the teeth side.

Further, the method for manufacturing an armature iron core of a rotary electric machine according to the present invention has a plurality of core blocks including a back yoke and a tooth protruding from the back yoke, and the back yokes of the plurality of core blocks are sequentially attached to each other. After the connecting body manufacturing step of manufacturing one or more connected core block connecting bodies and the connecting body manufacturing step, one or more core block connecting bodies are arranged in an annular shape with the teeth facing inward in the radial direction and adjacent to each other. A welding process is provided in which two matching core blocks are fixed to each other by welding, and one or more core block connectors are formed with one or more first core piece array layers in which each of the plurality of core pieces is arranged as a first core piece. , Each of the plurality of core pieces is formed by stacking one or more second core piece array layers in which each of the plurality of core pieces is arranged as the second core piece, and each of the plurality of core blocks is composed of the first core piece. And a second core piece are laminated, and two core blocks adjacent to each other in one or more core block connecting portions are connected by a rotary connecting portion. The connecting side end of the first core piece of one core block and the connecting side end of the second core piece of the other core block overlap each other, and the first core piece and the second core piece The end portions on the connecting side are rotatably connected to each other about the connecting axis, and the two first core pieces adjacent to each other in the first core piece array layer are on the opposite side to the teeth side. A first notch portion opened to is formed, and in the welding step, welding is performed on the first notch portion while melting a filler material different from the core block connecting body.

According to the method for manufacturing an armature core of a rotary electric machine, a core block connector, and an armature core of a rotary electric machine according to the present invention, between two first core pieces adjacent to each other in the first core piece array layer. , A first notch portion as a welding groove opened to the side opposite to the teeth side is formed. Therefore, by welding the first notch and providing the first weld in the first notch, it is possible to fix the two core blocks adjacent to each other with high strength and high rigidity. it can. Therefore, for example, the work of fitting the armature core to the inner surface of the cylindrical housing can be eliminated, and the productivity of the armature core can be improved. Further, the cost of the armature core can be reduced.

It is a top view which shows the rotary electric machine according to Embodiment 1 of this invention. It is an enlarged plan view which shows a part of the core block connection body in the armature iron core of FIG. It is a top view which shows the 1st core piece array layer laminated by the core block connecting body of the armature iron core of FIG. It is a top view which shows the 2nd core piece array layer laminated by the core block connecting body of the armature iron core of FIG. It is a block diagram which shows a part of the core block connection body of FIG. FIG. 3 is a plan view showing a first core piece array layer in a state where the first and second welded portions of FIG. 3 are not provided. It is a top view which shows the 2nd core piece array layer in the state which the 1st and 2nd weld part of FIG. 4 are not provided. 6 is an enlarged configuration diagram showing a part of a core block connection formed by laminating the first core piece array layer and the second core piece array layer of FIGS. 6 and 7. It is a top view which shows the state which the core block connecting body of FIG. 8 is unfolded. It is a top view which shows the state which the core block connection body of FIG. 8 is arranged in an annular shape. It is a block diagram which shows the main part of the armature iron core of the rotary electric machine according to Embodiment 2 of this invention. FIG. 5 is an enlarged plan view showing a main part of an armature core of a rotary electric machine according to a third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1.
FIG. 1 is a plan view showing a rotary electric machine according to the first embodiment of the present invention. In the figure, the rotary electric machine 1 has a rotary shaft 2, a rotor 3 fixed to the rotary shaft 2, and an annular armature 4 surrounding the outer periphery of the rotor 3.

The rotating shaft 2 is rotatably and horizontally supported by a housing which is a support base (not shown). The rotor 3 is arranged coaxially with the rotating shaft 2. The rotor 3 is rotatable with respect to the armature 4 integrally with the rotating shaft 2 about the axis of the rotating shaft 2. Further, the rotor 3 has a columnar rotor core 5 and a plurality of permanent magnets 6 fixed to the outer peripheral surface of the rotor core 5. The plurality of permanent magnets 6 are arranged at equal intervals in the circumferential direction of the rotor core 5.

The armature 4 is arranged coaxially with the rotating shaft 2 and the rotor 3. As a result, the armature 4 is arranged so that the axis of the armature 4 is horizontal. Further, the lower portion of the armature 4 is fixed to a housing that supports the rotating shaft 2. The upper part of the armature 4 is not fixed to the housing but is exposed from the housing. The armature 4 includes an annular armature core 7 that surrounds the outer periphery of the rotor 3, a plurality of armature coils 8 provided on the armature core 7, each of the plurality of armature coils 8, and the armature core 7. It has an insulator (not shown) that is interposed between the and.

The armature core 7 has one or more core block connectors 11 arranged in an annular shape. In this example, the armature iron core 7 is formed by connecting the four core block connecting bodies 11 in an annular shape.

Each core block connector 11 has a plurality of core blocks 12. In this example, nine core blocks 12 are included in each of the four core block connectors 11. Therefore, in this example, 36 core blocks 12 are included in the armature core 7.

Each core block 12 has a back yoke 13 and a teeth 14 projecting from an intermediate portion of the back yoke 13. In this example, the number of teeth 14 protruding from one back yoke 13 is only one. The four core block connecting bodies 11 constituting the armature iron core 7 are arranged in an annular shape with the teeth 14 facing inward in the radial direction in a state where the back yokes 13 are sequentially connected to each other.

The teeth 14 are arranged at intervals from each other in the circumferential direction of the armature core 7. As a result, a slot 15 which is a space is formed between the two teeth 14 adjacent to each other.

The armature coil 8 is provided on each tooth 14. In this example, an armature coil 8 is provided for each core block 12 by winding a lead wire around the teeth 14 in a concentrated manner via an insulator. As a result, in this example, 36 armature coils 8 are arranged at equal intervals in the circumferential direction of the armature core 7. An armature coil 8 is housed in each slot 15.

A first connection end surface 11a is formed at the end of the back yoke 13 of the core block 12 located at one end of each core block connection 11. A second connection end surface 11b is formed at the end of the back yoke 13 of the core block 12 located at the other end of each core block connection 11. The first and second connecting body end faces 11a and 11b are inclined in the circumferential direction of the armature core 7 with respect to a straight line along the radial direction of the armature core 7.

In the two core block connecting bodies 11 adjacent to each other, the first connecting body end surface 11a of one core block connecting body 11 and the second connecting body end face 11b of the other core block connecting body 11 are in contact with each other. In the state, they are connected by the welded portion 16 between the connecting bodies. As a result, the two core block connectors 11 adjacent to each other are fixed to each other at an angle at which the shape of the armature core 7 becomes an annular shape. The inter-connector welded portion 16 is provided on the outer peripheral portion of the armature core 7. Further, the welded portions 16 between the connecting bodies are provided at the boundary between the two core block connecting bodies 11 adjacent to each other.

FIG. 2 is an enlarged plan view showing a part of the core block connector 11 in the armature core 7 of FIG. In each core block connecting body 11, two core blocks 12 adjacent to each other are connected by a rotary connecting portion 17. The rotary connecting portion 17 is a connecting portion that rotatably connects two back yokes 13 adjacent to each other.

In the armature core 7, each core block connector 11 is provided with a first welded portion 18 and a second welded portion 19 for fixing two back yokes 13 adjacent to each other. That is, in the armature core 7, the rotation of the two back yokes 13 connected by the rotary connecting portion 17 is blocked by the first welded portion 18 and the second welded portion 19. As a result, in the armature iron core 7, the shape of each core block connecting body 11 is maintained in an arc shape. The shape of the armature core 7 is kept in an annular shape by keeping the shape of each core block connecting body 11 in an arc shape. The first welded portion 18 and the second welded portion 19 are provided on the outer peripheral portion of the armature core 7. Further, the first welded portion 18 and the second welded portion 19 are provided on both sides in the circumferential direction with respect to the rotary connecting portion 17.

The core block connector 11 is configured by laminating one or more first core piece array layers and one or more second core piece array layers in the axial direction.

FIG. 3 is a plan view showing a first core piece array layer laminated with the core block connector 11 of the armature core 7 of FIG. Further, FIG. 4 is a plan view showing a second core piece array layer laminated with the core block connector 11 of the armature core 7 of FIG. 1. As shown in FIG. 3, each of the plurality of core pieces is arranged as the first core piece 22 in the first core piece array layer 21 laminated by the core block connector 11. In the second core piece array layer 23 laminated by the core block connector 11, each of the plurality of core pieces is arranged as the second core piece 24. Each of the first core piece 22 and the second core piece 24 is a plate member formed by punching a steel plate. In this example, the core block connector 11 is formed by alternately stacking four layers each of the first core piece array layer 21 and the second core piece array layer 23.

In each core block 12, the first core piece 22 arranged in the first core piece array layer 21 and the second core piece 24 arranged in the second core piece array layer 23 are laminated. It is composed of. In this example, the core block 12 is formed by alternately stacking four layers of the first core piece 22 and the second core piece 24.

Each of the first core piece 22 and the second core piece 24 has a back yoke piece 25 and a tooth piece 26 protruding from an intermediate portion of the back yoke piece 25. The shape of each of the first core piece 22 and the second core piece 24 is T-shaped by the back yoke piece 25 and the tooth piece 26. The back yoke 13 is configured by laminating the back yoke pieces 25 of the first and second core pieces 22 and 24, respectively. Further, the teeth 14 is formed by stacking the teeth pieces 26 of the first and second core pieces 22 and 24, respectively.

As shown in FIG. 3, one end of the first core piece 22 of each core block 12 other than the core block 12 on which the first connecting body end surface 11a is formed is a connecting side end overhanging the rotary connecting portion 17. It is part 25a. Further, the other end of the first core piece 22 of each core block 12 other than the core block 12 on which the second connecting body end surface 11b is formed is a receiving side end portion formed while avoiding the rotary connecting portion 17. It is 25b.

As shown in FIG. 4, the other end of the second core piece 24 of each core block 12 other than the core block 12 on which the second connecting body end surface 11b is formed is a connecting side overhanging the rotary connecting portion 17. It has an end 25a. Further, one end of the second core piece 24 of each core block 12 other than the core block 12 on which the first connecting end surface 11a is formed is a receiving side end portion 25b formed while avoiding the rotary connecting portion 17. It has become.

In the first core piece array layer 21, a plurality of first core pieces 22 are arranged in a state where the connecting side end portion 25a and the receiving side end portion 25b face each other in the circumferential direction. In the second core piece array layer 23, a plurality of second core pieces 24 are arranged in a state where the connecting side end portion 25a and the receiving side end portion 25b face each other in the circumferential direction. Further, the orientation of the connecting side end portion 25a of each first core piece 22 and the orientation of the connecting side end portion 25a of each second core piece 24 are opposite to each other.

The first core piece array layer 21 and the second core piece array layer 23 are alternately laminated in four layers with the positions of the tooth pieces 26 aligned in the axial direction. As a result, in the rotary connecting portion 17 of the core block connecting body 11, the connecting side end portion 25a of the first core piece 22 and the connecting side end portion 25a of the second core piece 24 are alternately arranged in four layers in the axial direction. overlapping. The first core piece 22 and the second core piece 24, which are laminated in the axial direction, are integrated by the crimping portion 27.

A connecting shaft 28, which is a convex portion, is provided on the surface of each connecting side end portion 25a located at the rotary connecting portion 17. Further, a recess for fitting the connecting shaft 28 is provided on the back surface of each connecting side end portion 25a located in the rotary connecting portion 17. In the rotary connecting portion 17, of the two connecting side end portions 25a that overlap each other, the connecting shaft 28 provided on the surface of one connecting side end portion 25a is provided in a recess provided on the back surface of the other connecting side end portion 25a. It fits. As a result, in the rotary connecting portion 17, the connecting side end portions 25a of the first core piece 22 and the second core piece 24 are rotatably connected to each other around the connecting shaft 28.

That is, in the rotary connecting portion 17, the connecting side end portion 25a of the first core piece 22 of one core block 12 and the connecting side end portion 25a of the second core piece 24 of the other core block 12 are in the axial direction. The connecting side ends 25a of the first core piece 22 and the second core piece 24 are rotatably connected to each other about the connecting shaft 28.

In the first core piece array layer 21 in the core block connecting body 11, as shown in FIG. 3, of the two first core pieces 22 adjacent to each other, the connecting side end portion of one of the first core pieces 22 The first contact end face 29 is formed on 25a, and the second contact end face 30 is formed on the receiving side end portion 25b of the other first core piece 22. The connecting shaft 28 is located radially outside the first contact end face 29 and the second contact end face 30, respectively. Each of the first contact end face 29 and the second contact end face 30 is inclined in the circumferential direction with respect to a straight line along the radial direction of the armature core 7. The first contact end face 29 and the second contact end face 30 come into contact with each other by rotating the two core blocks 12 with respect to the connecting shaft 28 in the direction in which the teeth 14 approach each other.

In the second core piece array layer 23 in the core block connecting body 11, as shown in FIG. 4, the connecting side end portion of one of the second core pieces 24 of the two adjacent second core pieces 24. The first contact end face 31 is formed on 25a, and the second contact end face 32 is formed on the receiving side end portion 25b of the other second core piece 24. The connecting shaft 28 is located radially outside the first contact end face 31 and the second contact end face 32, respectively. Each of the first contact end face 31 and the second contact end face 32 is inclined in the circumferential direction with respect to a straight line along the radial direction of the armature core 7. The first contact end face 31 and the second contact end face 32 come into contact with each other by rotating the two core blocks 12 with respect to the connecting shaft 28 in the direction in which the teeth 14 approach each other.

In the armature core 7, the first contact end face 29 and the second contact end face 30 are in contact with each other, and the first contact end face 31 and the second contact end face 32 are in contact with each other and are adjacent to each other. The two core blocks 12 are fixed to each other. As a result, the shape of the core block connector 11 is maintained in an arc shape. In the state where the shape of the core block connecting body 11 is maintained in an arc shape, the rotation of the core blocks 12 in the direction in which the teeth 14 approach each other is prevented, and the teeth 14 are in the closest state to each other. ing.

In the first core piece array layer 21 in the core block connection 11, as shown in FIG. 3, between the two first core pieces 22 adjacent to each other, the side opposite to the teeth 14 side, that is, the armature iron core A first notch 35 that is open to the outside in the radial direction of 7 is provided.

The first notch portion 35 is provided on the outer peripheral portion of the armature core 7. Further, the first notch portion 35 is a connecting side end portion 25a of one of the first core pieces 22 and the other first core piece 22 of the two first core pieces 22 adjacent to each other. It is provided between the receiving side end portion 25b. In this example, two corners formed on the outer peripheral side of the connecting side end portion 25a of the first core piece 22 and the outer peripheral side corner portion of the receiving side end portion 25b of the first core piece 22. The inclined surface forms a V-shaped first notch 35.

In the second core piece array layer 23 in the core block connection 11, as shown in FIG. 4, between the two second core pieces 24 adjacent to each other, the side opposite to the teeth 14 side, that is, the armature iron core A second notch 36 that is open to the outside in the radial direction of 7 is provided.

The second notch 36 is provided on the outer peripheral portion of the armature core 7. Further, the second notch 36 is a connecting side end portion 25a of one of the second core pieces 24 and the other second core piece 24 of the two second core pieces 24 adjacent to each other. It is provided between the receiving side end portion 25b. In this example, two corners formed on the outer peripheral side of the connecting side end portion 25a of the second core piece 24 and the outer peripheral side corner portion of the receiving side end portion 25b of the second core piece 24, respectively. A V-shaped second notch 36 is formed by the inclined surface.

When the core block 12 is viewed along the direction in which the first and second core pieces 22 and 24 are laminated, the positions of the second core piece 24 that coincide with the first notch 35 are shown in FIG. As shown in 4, a second auxiliary notch 37 is formed on the side opposite to the teeth 14 side, that is, a second auxiliary notch 37 opened radially outward of the armature core 7. As a result, the second auxiliary notch 37 is provided on the outer peripheral portion of the armature core 7. In this example, the shape of the second auxiliary notch 37 is V-shaped so as to overlap the shape of the first notch 35. The second auxiliary notch 37 is provided in the back yoke piece 25 of the second core piece 24.

When the core block 12 is viewed along the direction in which the first and second core pieces 22 and 24 are laminated, the positions of the first core piece 22 that coincide with the second notch 36 are shown in FIG. As shown in 3, a first auxiliary notch 38 is formed on the side opposite to the teeth 14 side, that is, a first auxiliary notch 38 opened radially outward of the armature core 7. As a result, the first auxiliary notch 38 is provided on the outer peripheral portion of the armature core 7. In this example, the shape of the first auxiliary notch 38 is V-shaped so as to overlap the shape of the second notch 36. The first auxiliary notch 38 is provided in the back yoke piece 25 of the first core piece 22.

FIG. 5 is a configuration diagram showing a part of the core block connector 11 of FIG. The first welded portion 18 is continuously provided in the first notch portion 35 and the second auxiliary notch portion 37. As a result, the first notch 35 and the second auxiliary notch 37 are filled with the first weld 18. In each core block 12, the first core pieces 22 that overlap each other, the second core pieces 24 that overlap each other, and the first and second core pieces 22 and 24 that overlap each other are laminated by the first welded portion 18. It is fixed in the direction. Further, in the core block connecting body 11, of the two core blocks 12 connected to each other by the rotary connecting portion 17, the first core piece 22 of one core block 12 and the first core of the other core block 12 The pieces 22 and the pieces 22 are fixed to each other by the first welded portion 18.

The second welded portion 19 is continuously provided in the second notch portion 36 and the first auxiliary notch portion 38. As a result, the second notch 36 and the first auxiliary notch 38 are filled with the second weld 19. In each core block 12, the first core pieces 22 that overlap each other, the second core pieces 24 that overlap each other, and the first and second core pieces 22 and 24 that overlap each other are laminated by the second welded portion 19. It is fixed in the direction. Further, in the core block connecting body 11, of the two core blocks 12 connected to each other by the rotary connecting portion 17, the second core piece 24 of one core block 12 and the second core block 12 of the other core block 12 The core piece 24 and the core piece 24 are fixed to each other by the second welded portion 19.

Next, a method of manufacturing the armature 4 will be described.
(Connected body manufacturing process)
First, as shown in FIGS. 6 and 7, by punching the steel plate with a die, one or more first core piece array layers 21 in which each of the plurality of core pieces is arranged as the first core piece 22 and a plurality of core pieces are arranged. One or more second core piece array layers 23, each of which is arranged as a second core piece 24, are produced. After that, one or more first core piece array layers 21 and one or more second core piece array layers 23 are laminated and pressed to form one or more core block connectors having a plurality of core blocks 12, respectively. 11 is made.

Each core block 12 has a back yoke 13 and a teeth 14 projecting from an intermediate portion of the back yoke 13. In each core block connecting body 11, the back yokes 13 of each core block 12 are sequentially connected by a rotary connecting portion 17.

FIG. 8 is an enlarged configuration diagram showing a part of the core block connection 11 formed by laminating the first core piece array layer 21 and the second core piece array layer 23 of FIGS. 6 and 7. .. The two core blocks 12 connected to each other by the rotary connecting portion 17 can rotate about the connecting shaft 28 in the direction in which the distance between the teeth 14 adjacent to each other changes.

The distance between the teeth 14 in the core block connector 11 is such that the first contact end face 29 and the second contact end face 30 are in contact with each other between the first core pieces 22 and the second core pieces 24 are in contact with each other. The first contact end face 31 and the second contact end face 32 come into contact with each other, so that the contact end face 31 becomes the smallest. When the distance between the teeth 14 is the smallest, the shape of the core block connector 11 becomes an arc shape.

In the core block connector 11, the back yoke pieces of the first core pieces 22 are brought into contact with each other by the first contact end faces 29 and the second contact end faces 30 between the first core pieces 22. A V-shaped first notch 35 is formed between the 25 as a welding groove. Further, in the core block connector 11, the first contact end surface 31 and the second contact end surface 32 come into contact with each other between the second core pieces 24, so that the backs of the second core pieces 24 are each backed up. A V-shaped second notch 36 is formed between the yoke pieces 25 as a welding groove. When the core block connector 11 is viewed along the direction in which the first and second core pieces 22 and 24 are laminated, the back yoke piece 25 of the second core piece 24 is formed as a welding groove. The V-shaped second auxiliary notch 37 coincides with the position of the first notch 35. Further, when the core block connector 11 is viewed along the direction in which the first and second core pieces 22 and 24 are laminated, they are formed on the back yoke piece 25 of the first core piece 22 as a welding groove. The V-shaped first auxiliary notch 38 coincides with the position of the second notch 36.

When the core blocks 12 rotate in the direction in which the distance between the teeth 14 increases and the core block connector 11 is deployed, the first contact end face 29 and the second contact end face 30 are separated from each other and the second contact end face 30 The contact end face 31 of 1 and the second contact end face 32 are separated from each other. As a result, when the core block connecting body 11 is deployed, the V-shaped shapes of the first notch portion 35 and the second notch portion 36 are broken.

(Armor coil installation process)
After the connecting body manufacturing step, as shown in FIG. 9, the core block connecting body 11 is developed by rotating the core blocks 12 with each other around the connecting shaft 28 in the direction in which the distance between the teeth 14 increases. After that, the armature coil 8 is provided on each tooth 14 by winding a lead wire around the teeth 14 via an insulator in a state where the core block connector 11 is expanded.

(Welding process)
After the armature coil installation step, the core blocks 12 are rotated around the connecting shaft 28 to return the deployed state of the core block connecting body 11, and the shape of the core block connecting body 11 is made into an arc shape. After that, one or more arcuate core block connectors 11 provided with armature coils 8 are arranged in an annular shape. In this example, as shown in FIG. 10, four arc-shaped core block connecting bodies 11 are arranged in an annular shape. At this time, of the two core block connecting bodies 11 adjacent to each other, the first connecting body end face 11a of one core block connecting body 11 and the second connecting body end face 11b of the other core block connecting body 11 are connected. Bring them into contact with each other. After that, the two core blocks 12 adjacent to each other are fixed by welding. At this time, welding is performed on the core block connecting body 11 while melting the solid wire which is a filler material different from the core block connecting body 11. That is, overlay welding is performed on the core block connector 11.

As shown in FIG. 5, the welding is performed on the first notch 35 and the second notch 35 and the second notch 35 while melting the solid wire from the outer peripheral side of the core block connection 11 over all the core piece array layers in the core block connection 11. This is performed continuously on the auxiliary notch 37. As a result, the first welded portion 18 is provided in the first notched portion 35 and the second auxiliary notch portion 37. Further, in the welding, the second notch 36 and the first auxiliary notch 38 are welded while melting the solid wire from the outer peripheral side of the core block connection 11 over all the core piece array layers in the core block connection 11. Also continuously. As a result, the second welded portion 19 is provided in the second notch portion 36 and the first auxiliary notch portion 38. The shape of the core block connector 11 is fixed in an arc shape by the first welded portion 18 and the second welded portion 19.

Further, welding is also performed on the boundary between the two core block connecting bodies 11 adjacent to each other while melting the solid wire from the outer peripheral side of the core block connecting body 11. As a result, the inter-connector welded portion 16 is formed at the boundary position between the two core block connectors 11, and the two core block connectors 11 adjacent to each other are fixed to each other. In this way, the armature core 7 is manufactured, and the armature 4 is manufactured.

In the armature core 7 of such a rotary electric machine, the first core piece array layer 21 is opened between the two first core pieces 22 adjacent to each other on the side opposite to the teeth 14 side. A notch 35 is formed, and a first weld 18 for fixing the two core blocks 12 connected to each other by the rotary connecting portion 17 is provided in the first notch 35. Therefore, the depth of the first welded portion 18, that is, the size of the throat thickness in the butt welding of the first core pieces 22 can be increased, and the core blocks 12 are fixed to each other with high strength and high rigidity. can do. As a result, the shape of the armature core 7 can be kept in an annular shape without using other fixing means, and for example, the work of fitting the armature core 7 on the inner surface of the cylindrical housing can be eliminated. Therefore, the productivity of the armature core 7 can be improved, and the cost of the armature core 7 can be reduced.

Further, when the core block 12 is viewed along the direction in which the first and second core pieces 22 and 24 are laminated, the position of the second core piece 24 coincides with the first notch 35. , A second auxiliary notch 37 opened to the side opposite to the teeth 14 side is formed, and the first welded portion 18 is formed in the first notch 35 and the second auxiliary notch 37. It is provided continuously. Therefore, not only the two first core pieces 22 adjacent to each other but also the first and second core pieces 22 and 24 overlapping each other can be fixed by the first welded portion 18. As a result, the shape of the armature core 7 can be more reliably maintained in an annular shape without using other fixing means.

Further, in the second core piece array layer 23, a second notch 36 opened to the side opposite to the teeth 14 side is formed between the two second core pieces 24 adjacent to each other and rotates. A second welded portion 19 for fixing the two core blocks 12 connected to each other by the connecting portion 17 is provided in the second notch portion 36. Therefore, the depth of the second welded portion 19, that is, the size of the throat thickness in the butt welding of the second core pieces 24 can be increased, and the core blocks 12 are fixed to each other with high strength and high rigidity. can do. As a result, the two core blocks 12 connected to each other by the rotary connecting portion 17 can be fixed to each other by the first welded portion 18 and the second welded portion 19, respectively, and the armature can be fixed without using other fixing means. The shape of the child core 7 can be more reliably maintained in an annular shape. Therefore, the productivity of the armature core 7 can be improved, and the cost of the armature core 7 can be reduced.

Further, when the core block 12 is viewed along the direction in which the first and second core pieces 22 and 24 are laminated, the position of the first core piece 22 coincides with the second notch 36. , A first auxiliary notch 38 opened to the side opposite to the teeth 14 side is formed, and a second weld 19 is formed in the second notch 36 and the first auxiliary notch 38. It is provided continuously. Therefore, not only the two second core pieces 24 adjacent to each other but also the first and second core pieces 22 and 24 overlapping each other can be fixed by the second welded portion 19. As a result, the shape of the armature core 7 can be more reliably maintained in an annular shape without using other fixing means.

Further, in such a core block connector 11, a first core piece array layer 21 is opened between two first core pieces 22 adjacent to each other on the side opposite to the teeth 14 side. The notch 35 is formed as a groove for welding. Therefore, the first welded portion 18 can be provided by overlay welding so as to fill the first notch portion 35, and the depth of the first welded portion 18, that is, the abutment of the first core pieces 22 with each other. The size of the throat thickness in welding can be increased. As a result, the core blocks 12 can be fixed to each other with high strength and high rigidity, and the core block connecting body 11 that maintains an arc shape can be easily formed without using other fixing means. Therefore, the productivity of the armature core 7 can be improved, and the cost of the armature core 7 can be reduced.

Further, in the core block connector 11, when the core block 12 is viewed along the direction in which the first and second core pieces 22 and 24 are laminated, the first notch portion in the second core piece 24 is formed. A second auxiliary notch 37 opened to the side opposite to the tooth 14 side is formed as a welding groove at a position corresponding to 35. Therefore, the first welded portion 18 can be provided by overlay welding so as to continuously fill each of the first cutout portion 35 and the second auxiliary cutout portion 37. As a result, not only the two first core pieces 22 adjacent to each other but also the first and second core pieces 22 and 24 overlapping each other can be fixed by the first welded portion 18. Therefore, it is possible to more reliably form the core block connecting body 11 that maintains an arc shape without using other fixing means.

Further, in the core block connector 11, a second notch portion opened to the side opposite to the teeth 14 side between two second core pieces 24 adjacent to each other in the second core piece array layer 23. 36 is formed as a welding groove. Therefore, the second welded portion 19 can be provided by overlay welding so as to fill the second notch portion 36, and the depth of the second welded portion 19, that is, the abutting of the second core pieces 24 with each other. The size of the throat thickness in welding can be increased. As a result, the two core blocks 12 connected to each other by the rotary connecting portion 17 can be fixed by each of the first welded portion 18 and the second welded portion 19, and the circle can be fixed without using other fixing means. The core block connector 11 that maintains an arc shape can be formed more reliably.

Further, in the core block connecting body 11, when the core block 12 is viewed along the direction in which the first and second core pieces 22 and 24 are laminated, the second notch portion in the first core piece 22 is formed. At a position corresponding to 36, a first auxiliary notch 38 opened to the side opposite to the teeth 14 side is formed as a welding groove. Therefore, the second welded portion 19 can be provided by overlay welding so as to continuously fill each of the second notched portion 36 and the first auxiliary notched portion 38. As a result, not only the two second core pieces 24 adjacent to each other but also the first and second core pieces 22 and 24 overlapping each other can be fixed by the second welded portion 19. Therefore, it is possible to more reliably form the core block connecting body 11 that maintains an arc shape without using other fixing means.

Further, in such a method of manufacturing the armature iron core 7, one or more core block connecting bodies 11 are arranged in an annular shape, and a first core piece 22 formed between two adjacent first core pieces 22 is formed. The notch 35 includes a welding step of performing welding while melting the solid wire. Therefore, overlay welding can be performed so as to fill the first notch portion 35, and the size of the throat thickness in the butt welding of the first core pieces 22 can be increased. As a result, the two core blocks 12 connected by the rotary connecting portion 17 can be fixed with high strength and high rigidity. Further, since most of the heat during welding is used for melting the solid wire, the heat transfer to the entire armature core 7 is reduced as compared with the case where the core block 12 itself is melted to secure a large throat thickness. This makes it possible to make the entire armature core 7 less susceptible to adverse effects due to welding strain. As a result, the armature core 7 that maintains an annular shape without using other fixing means can be easily and more reliably manufactured. Therefore, the productivity of the armature core 7 can be improved, and the cost of the armature core 7 can be reduced.

Further, in the welding step, welding is performed while continuously melting the solid wire to the first notch portion 35 and the second auxiliary notch portion 37 formed in the second core piece 24. Therefore, not only the two first core pieces 22 adjacent to each other but also the first and second core pieces 22 and 24 overlapping each other can be fixed with high strength and high rigidity, and other fixing means can be used. It is possible to more reliably form the armature iron core 7 that maintains an annular shape without using the above.

Further, in the welding step, welding is performed while melting the solid wire in the second notch 36 formed between the two second core pieces 24 adjacent to each other. Therefore, overlay welding can be performed so as to fill the second notch 36, and the size of the throat thickness in the butt welding of the second core pieces 24 can be increased. As a result, the two core blocks 12 connected to each other by the rotary connecting portion 17 can be fixed to each other by overlay welding in each of the first notch portion 35 and the second notch portion 36, and the other fixing can be performed. It is possible to more reliably form the armature core 7 that maintains an annular shape without using any means.

Further, in the welding step, welding is performed while continuously melting the solid wire to the second notch 36 and the first auxiliary notch 38 formed in the first core piece 22. Therefore, not only the two second core pieces 24 adjacent to each other but also the first and second core pieces 22 and 24 overlapping each other can be fixed with high strength and high rigidity, and other fixing means can be used. It is possible to more reliably form the armature iron core 7 that maintains an annular shape without using the above.

Embodiment 2.
FIG. 11 is a configuration diagram showing a main part of an armature core of a rotary electric machine according to a second embodiment of the present invention. The first welded portion 18 is continuously provided in the first notch portion 35 and the second auxiliary notch portion 37, avoiding a part of the second auxiliary notch portion 37. That is, the first welded portion 18 is continuously provided in the entire first notched portion 35 and the remaining portion of the second auxiliary notched portion 37 excluding a part of the non-welded area. .. In this example, of the four layers of the second core pieces 24 that are continuously overlapped in the stacking direction, the second auxiliary notch formed in the first layer of the second core piece 24 that overlaps the first core piece 22. The first welded portion 18 is provided in the portion 37, and the first welded portion 18 is not provided in the second auxiliary notch portion 37 formed in the other second core piece 24.

The second welded portion 19 is continuously provided in the second notch portion 36 and the first auxiliary notch portion 38, avoiding a part of the first auxiliary notch portion 38. That is, the second welded portion 19 is continuously provided in the entire second notched portion 36 and the remaining portion of the first auxiliary notched portion 38 excluding a part of the non-welded area. .. In this example, of the four layers of the first core piece 22 that are continuously overlapped in the stacking direction, the first auxiliary notch formed in the first layer of the first core piece 22 that overlaps the second core piece 24. The second welded portion 19 is provided in the portion 38, and the second welded portion 19 is not provided in the first auxiliary notch portion 38 formed in the other first core piece 22.

As a result, the respective partial ranges of the first welded portion 18 and the second welded portion 19 overlap each other in the stacking direction of the first and second core pieces 22, 24. Other configurations are the same as those in the first embodiment.

The method of manufacturing the armature 4 in the second embodiment is the same as that of the first embodiment except for the welding step.

In the welding step, the solid wire is melted from the outer peripheral side of the core block connection 11 while avoiding the second auxiliary notch 37 of a part of the second core piece array layer 23 in the core block connection 11. Welding is continuously performed on the notch 35 of 1 and the auxiliary notch 37 of the second. As a result, the first welded portion 18 is continuously provided in the entire first cutout portion 35 and the remaining portion of the second auxiliary cutout portion 37 excluding the non-welded area.

Further, in the welding step, the solid wire is melted from the outer peripheral side of the core block connecting body 11 while avoiding the first auxiliary notch 38 of a part of the first core piece array layer 21 in the core block connecting body 11. However, welding is continuously performed on the second notch 36 and the first auxiliary notch 38. As a result, the second welded portion 19 is continuously provided in the entire second cutout portion 36 and the remaining portion of the first auxiliary cutout portion 38 excluding the non-welded area.

As described above, in the second embodiment, the first welded portion 18 is continuous with the first notched portion 35 and the second auxiliary notched portion 37 while avoiding a part of the second auxiliary notch portion 37. A second welded portion 19 is continuously provided in the second notch 36 and the first auxiliary notch 38, avoiding a part of the first auxiliary notch 38. .. Therefore, the amount of solid wire required for welding can be reduced, and the cost can be further reduced. Further, the ranges of a part of each of the first welded portion 18 and the second welded portion 19 overlap each other in the stacking direction of the first and second core pieces 22 and 24. As a result, the core blocks 12 can be fixed to each other with high strength and high rigidity, and the shape of the armature core 7 can be maintained in an annular shape without using other fixing means.

Embodiment 3.
FIG. 12 is an enlarged plan view showing a main part of the armature core of the rotary electric machine according to the third embodiment of the present invention. In the armature core 7, of the two core blocks 12 connected to each other by the rotary connecting portion 17, the first contact end surface 29 of the first core piece 22 of one core block 12 and the other core block 12 The second contact end face 30 of the first core piece 22 is in contact with each other in the circumferential direction of the connecting shaft 28. Further, in the armature core 7, of the two core blocks 12 connected to each other by the rotary connecting portion 17, the first contact end surface 31 of the second core piece 22 of the other core block 12 and one core block. The second contact end surface 32 of the second core piece 24 of the twelve is in contact with each other in the circumferential direction of the connecting shaft 28.

That is, the two first core pieces 22 adjacent to each other in the first core piece array layer 21 are formed with the first and second contact end faces 29 and 30 that are in contact with each other in the circumferential direction of the connecting shaft 28. There is. Further, in the second core piece array layer 23, the two second core pieces 24 adjacent to each other are formed with the first and second contact end faces 31 and 32 that are in contact with each other in the circumferential direction of the connecting shaft 28. There is.

A recess 41 is provided in the first contact end surface 29 of the first core piece 22 in the one core block 12. The second contact end surface 30 of the first core piece 22 in the other core block 12 is provided with a protrusion 42 that fits into the recess 41. The recess 41 and the protrusion 42 are provided along a common arc centered on the connecting shaft 28. As a result, when the two core blocks 12 rotate about the connecting shaft 28, the protrusion 42 of the first core piece 22 fits in and out of the recess 41 of the first core piece 22.

A recess 43 is provided in the first contact end surface 31 of the second core piece 24 in the other core block 12. The second contact end surface 32 of the second core piece 24 in the one core block 12 is provided with a protrusion 44 that fits into the recess 43. The recess 43 and the protrusion 44 are provided along a common arc centered on the connecting shaft 28. As a result, when the two core blocks 12 rotate about the connecting shaft 28, the protrusion 44 of the second core piece 24 fits in and out of the recess 43 of the second core piece 24.

The shape of the core block connector 11 becomes an arc shape when the protrusion 42 fits into the recess 41 and the protrusion 44 fits into the recess 43. Other configurations are the same as those in the first embodiment.

The method of manufacturing the armature core 7 is the same as that of the first embodiment. In the welding process, the first cutting is performed while melting the solid wire in a state where the protrusion 42 is fitted in the recess 41 and the protrusion 44 is fitted in the recess 43, that is, the shape of the core block connecting body 11 is arcuate. Welding is continuously performed on the notch 35 and the second auxiliary notch 37. Further, in a state where the core block connecting body 11 has an arcuate shape, welding is continuously performed while melting the solid wire in the second notch portion 36 and the first auxiliary notch portion 38. As a result, the first welded portion 18 is continuously provided in the first notch portion 35 and the second auxiliary notch portion 37, and the second notch portion 36 and the first auxiliary notch portion 38 are provided in succession. A second welded portion 19 is continuously provided in the.

The first welded portion 18 is provided in the first notch portion 35 and the second auxiliary notch portion 37, and the second welded portion 19 is provided in the second notch portion 36 and the first auxiliary notch portion 38. If it is provided, welding distortion may occur centering on each of the first welded portion 18 and the second welded portion 19. However, the protrusions 42 and 44 are separated from the recesses 41 and 43 only by the rotation of the two core blocks 12 about the connecting shaft 28. Therefore, even if a welding strain force is applied in a direction in which the two core blocks 12 are separated from each other centering on each of the first welded portion 18 and the second welded portion 19 existing at positions different from the position of the connecting shaft 28. , The protrusions 42 and 44 do not come off from the recesses 41 and 43. As a result, even when the first and second welded portions 18 and 19 are provided, the state in which the protrusions 42 and 44 are fitted into the recesses 41 and 43 is maintained, and the welding distortion is suppressed.

In such an armature core 7 and the core block connecting body 11, recesses 41 and 43 are provided in the first contact end faces 29 and 31, respectively, and recesses 41 and 43 are provided in the second contact end faces 30 and 32, respectively. The protrusions 42 and 44 to which the machine fits are provided. Further, the recesses 41, 43 and the protrusions 42, 44 are provided along a common arc centered on the connecting shaft 28. Therefore, even if a welding strain force is applied in a direction in which the two core blocks 12 are separated from each other centering on each of the first welded portion 18 and the second welded portion 19 existing at positions different from the position of the connecting shaft 28. , The state in which the protrusions 42 and 44 are fitted in the recesses 41 and 43 can be maintained. As a result, welding distortion due to each of the first welded portion 18 and the second welded portion 19 can be suppressed, and misalignment between the two core blocks 12 connected to each other by the rotary connecting portion 17 can be suppressed. Can be done. Therefore, the shape of the armature core 7 can be more reliably maintained in an annular shape. Further, since the state in which the protrusions 42 and 44 are fitted into the recesses 41 and 43 is maintained at the time of welding, the welding work can be facilitated.

In the above example, recesses 41 and 43 are provided in the first contact end faces 29 and 31 of the first core piece array layer 21 and the second core piece array layer 23, respectively, and the first core piece array is provided. Protrusions 42 and 44 are provided on the second contact end faces 30 and 32 of the layer 21 and the second core piece array layer 23, respectively. However, the recess 41 and the protrusion 42 may be provided only on the first and second contact end faces 29 and 30 of the first core piece array layer 21. Further, the recess 43 and the protrusion 44 may be provided only on the first and second contact end faces 31 and 32 of the second core piece array layer 23. Further, protrusions 42 and 44 may be provided on the first contact end faces 29 and 31, and recesses 41 and 43 may be provided on the second contact end faces 30 and 32. That is, in at least one of the first core piece array layer 21 and the second core piece array layer 23, a recess 41 is provided in one of the first and second contact end faces that are in contact with each other in the circumferential direction of the connecting shaft 28. , 43 may be provided, and protrusions 42, 44 may be provided on the other side.

Further, in the first and third embodiments, the first welded portion 18 is continuously provided in the first notched portion 35 and the second auxiliary notched portion 37. However, the first welded portion 18 may be provided in the first notched portion 35 while avoiding the second auxiliary notched portion 37. Even in this way, the two first core pieces 22 adjacent to each other can be fixed to each other by the first welded portion 18, and the two core blocks 12 connected to each other by the rotary connecting portion 17 are fixed to each other. be able to. Further, when the first welded portion 18 is provided in the first notch 35 while avoiding the second auxiliary notch 37, the second auxiliary notch 37 may not be provided.

Further, in the first and third embodiments, the second welded portion 19 is continuously provided in the second notched portion 36 and the first auxiliary notched portion 38. However, the second welded portion 19 may be provided in the second notched portion 36 while avoiding the first auxiliary cutout portion 38. Even in this way, the two second core pieces 24 adjacent to each other can be fixed to each other by the second welded portion 19, and the two core blocks 12 connected to each other by the rotary connecting portion 17 are fixed to each other. be able to. Further, when the second welded portion 19 is provided in the second notch 36 while avoiding the first auxiliary notch 38, the first auxiliary notch 38 may not be provided.

Further, in the first and third embodiments, the first welded portion 18 is provided in the first notched portion 35, and the second welded portion 19 is provided in the second notched portion 36. However, the second welded portion 19 may not be provided in the second notched portion 36, and only the first welded portion 18 may be provided in the first notched portion 35. Further, the first welded portion 18 may not be provided in the first notched portion 35, and only the second welded portion 19 may be provided in the second notched portion 36. Further, among the rotary connecting portions 17 between all the core blocks 12 in the core block connecting body 11, the rotary connecting portion 17 in which only the first welded portion 18 is provided without providing the second welded portion 19 and the first The rotary connecting portion 17 provided with only the second welded portion 19 without providing the welded portion 18 of the above may be mixed. Therefore, in the core block connecting body 11, the first welded portion 18 is provided only in a part of the first notched portions 35 among all the first notched portions 35, and all the second notched portions 35 are provided. The second welded portion 19 may be provided only in the second notched portion 36 of a part of 36.

Further, in each of the above embodiments, the first core piece array layer 21 and the second core piece array layer 23 are alternately laminated by four layers, but the present invention is not limited to this. For example, the first core piece array layer 21 and the second core piece array layer 23 may be alternately laminated one layer at a time, two layers at a time, three layers at a time, or five or more layers at a time.

Further, in each of the above-described embodiments, the armature core 7 includes four core block connectors 11 arranged in an annular shape, but the number of core block connectors 11 included in the armature core 7 is this. Not limited to. For example, one, two, three, or five or more core block connectors 11 may be arranged in an annular shape.

Further, in each of the above-described embodiments, the first notch portion 35 and the second notch portion 36 have a V-shape, respectively, but the first notch portion 35 and the second notch portion 35 have a V shape. The shape of each of the notches 36 is not limited to this. For example, at least one of the first notch 35 and the second notch 36 may be U-shaped. Even in this way, the depths of the first welded portion 18 and the second welded portion 19, that is, the throat thickness in the butt welding can be secured to be large, and the two welded portions 17 are connected to each other. The core blocks 12 can be fixed to each other with high strength and high rigidity.

1 rotary machine, 7 armature core, 11 core block connector, 12 core block, 13 back yoke, 14 teeth, 17 rotary connector, 18 1st weld, 19 2nd weld, 21 1st core Single array layer, 22 1st core piece, 23 2nd core piece array layer, 24 2nd core piece, 25a connecting side end, 28 connecting shaft, 29, 31 1st contact end face, 30, 32nd 2 contact end face, 35 1st notch, 36 2nd notch, 37 2nd auxiliary notch, 38 1st auxiliary notch, 41, 43 recesses, 42, 44 protrusions.

Claims (12)

With one or more core block interconnects with multiple core blocks,
Each of the plurality of core blocks has a back yoke and a tooth protruding from the back yoke.
The one or more core block connecting bodies are arranged in an annular shape with the teeth facing inward in the radial direction in a state where the back yokes are sequentially connected to each other.
In the one or more core block linkages, one or more first core piece array layers in which each of the plurality of core pieces is arranged as the first core piece, and each of the plurality of core pieces are arranged as the second core piece. It is configured by laminating one or more second core piece array layers.
Each of the plurality of core blocks is configured by laminating the first core piece and the second core piece.
In the one or more core block connecting bodies, the two core blocks adjacent to each other are connected by a rotary connecting portion.
In the rotary connecting portion, the connecting side end portion of the first core piece of one of the core blocks and the connecting side end portion of the second core piece of the other core block overlap each other, and the first The connecting side ends of the core piece 1 and the second core piece are rotatably connected to each other about the connecting shaft.
In the first core piece array layer, a first notch portion opened to the side opposite to the teeth side is formed between the two adjacent first core pieces.
The first notch portion is provided with a first welded portion for fixing the two core blocks connected to each other by the rotary connecting portion .
When the core block is viewed along the direction in which the first core piece and the second core piece are laminated, the position of the second core piece coincides with the first notch. , A second auxiliary notch open to the side opposite to the teeth side is formed.
An armature core of a rotating electric machine , wherein the first welded portion is continuously provided in the first notch portion and the second auxiliary notch portion . In the second core piece array layer, a second notch portion opened to the side opposite to the tooth side is formed between the two adjacent second core pieces.
The armature core of the rotary electric machine according to claim 1 , wherein the second notch portion is provided with a second welded portion for fixing the two core blocks connected to each other by the rotary connecting portion. .. One or more core block interconnects with multiple core blocks
With
Each of the plurality of core blocks has a back yoke and a tooth protruding from the back yoke.
The one or more core block connecting bodies are arranged in an annular shape with the teeth facing inward in the radial direction in a state where the back yokes are sequentially connected to each other.
In the one or more core block linkages, one or more first core piece array layers in which each of the plurality of core pieces is arranged as the first core piece, and each of the plurality of core pieces are arranged as the second core piece. It is configured by laminating one or more second core piece array layers.
Each of the plurality of core blocks is configured by laminating the first core piece and the second core piece.
In the one or more core block connecting bodies, the two core blocks adjacent to each other are connected by a rotary connecting portion.
In the rotary connecting portion, the connecting side end portion of the first core piece of one of the core blocks and the connecting side end portion of the second core piece of the other core block overlap each other, and the first The connecting side ends of the core piece 1 and the second core piece are rotatably connected to each other about the connecting shaft.
In the first core piece array layer, a first notch portion opened to the side opposite to the teeth side is formed between the two adjacent first core pieces.
The first notch portion is provided with a first welded portion for fixing the two core blocks connected to each other by the rotary connecting portion.
In the second core piece array layer, a second notch portion opened to the side opposite to the tooth side is formed between the two adjacent second core pieces.
The second notch portion is provided with a second welded portion for fixing the two core blocks connected to each other by the rotary connecting portion.
When the core block is viewed along the direction in which the first core piece and the second core piece are laminated, the position of the first core piece coincides with the second notch. , A first auxiliary notch open to the side opposite to the teeth side is formed.
Wherein the second notch and said first auxiliary notch, the second weld that provided continuously rotating electric machine armature core. Two core pieces adjacent to each other in at least one of the first core piece array layer and the second core piece array layer are in first and second contact with each other in the circumferential direction of the connecting shaft. The end face is formed and
Of the first and second contact end faces, one is provided with a recess, and the other is provided with a protrusion that fits into the recess.
The armature core of the rotary electric machine according to any one of claims 1 to 3 , wherein the recess and the protrusion are arranged along a common arc centered on the connecting shaft. A plurality of core blocks each having a back yoke and a tooth protruding from the back yoke are provided.
A core block connector in which the back yokes of the plurality of core blocks are sequentially connected to each other.
The core block connector includes one or more first core piece array layers in which each of the plurality of core pieces is arranged as a first core piece, and one or more core pieces in which each of the plurality of core pieces is arranged as a second core piece. It is configured by laminating a second core piece array layer.
Each of the plurality of core blocks is configured by laminating the first core piece and the second core piece.
The two core blocks adjacent to each other are connected by a rotary connecting portion.
In the rotary connecting portion, the connecting side end portion of the first core piece of one of the core blocks and the connecting side end portion of the second core piece of the other core block overlap each other, and the first The connecting side ends of the core piece 1 and the second core piece are rotatably connected to each other about the connecting shaft.
A first notch portion as a welding groove opened to the side opposite to the teeth side is formed between two adjacent first core pieces in the first core piece array layer. It is,
When the core block is viewed along the direction in which the first core piece and the second core piece are laminated, the position of the second core piece coincides with the first notch. , A core block connecting body in which a second auxiliary notch portion as a welding groove opened to the side opposite to the teeth side is formed . A second notch as a welding groove opened to the side opposite to the teeth side is formed between the two adjacent second core pieces in the second core piece array layer. The core block connector according to claim 5 . A plurality of core blocks each having a back yoke and a tooth protruding from the back yoke.
With
A core block connector in which the back yokes of the plurality of core blocks are sequentially connected to each other.
The core block connector includes one or more first core piece array layers in which each of the plurality of core pieces is arranged as a first core piece, and one or more core pieces in which each of the plurality of core pieces is arranged as a second core piece. It is configured by laminating a second core piece array layer.
Each of the plurality of core blocks is configured by laminating the first core piece and the second core piece.
The two core blocks adjacent to each other are connected by a rotary connecting portion.
In the rotary connecting portion, the connecting side end portion of the first core piece of one of the core blocks and the connecting side end portion of the second core piece of the other core block overlap each other, and the first The connecting side ends of the core piece 1 and the second core piece are rotatably connected to each other about the connecting shaft.
A first notch portion as a welding groove opened to the side opposite to the teeth side is formed between two adjacent first core pieces in the first core piece array layer. Being done
A second notch as a welding groove opened to the side opposite to the teeth side is formed between the two adjacent second core pieces in the second core piece array layer. Has been
When the core block is viewed along the direction in which the first core piece and the second core piece are laminated, the position of the first core piece coincides with the second notch. It said first auxiliary notch is benzalkonium a block coupling body is formed as a welding groove which is open to the side opposite to the teeth side. Two core pieces adjacent to each other in at least one of the first core piece array layer and the second core piece array layer are in first and second contact with each other in the circumferential direction of the connecting shaft. The end face is formed and
Of the first and second contact end faces, one is provided with a recess, and the other is provided with a protrusion that fits into the recess.
The core block connecting body according to any one of claims 5 to 7 , wherein the recess and the protrusion are arranged along a common arc centered on the connecting shaft. One or more core block connectors having a back yoke and a plurality of core blocks including teeth protruding from the back yoke, and the back yokes of the plurality of core blocks are sequentially connected to each other are produced. After the connecting body manufacturing step and the connecting body manufacturing step, the one or more core block connecting bodies are arranged in an annular shape with the teeth facing inward in the radial direction, and the two core blocks adjacent to each other are welded to each other. Equipped with a welding process to fix
In the one or more core block linkages, one or more first core piece array layers in which each of the plurality of core pieces is arranged as the first core piece, and each of the plurality of core pieces are arranged as the second core piece. It is configured by laminating one or more second core piece array layers.
Each of the plurality of core blocks is configured by laminating the first core piece and the second core piece.
In the one or more core block connecting bodies, the two core blocks adjacent to each other are connected by a rotary connecting portion.
In the rotary connecting portion, the connecting side end portion of the first core piece of one of the core blocks and the connecting side end portion of the second core piece of the other core block overlap each other, and the first The connecting side ends of the core piece 1 and the second core piece are rotatably connected to each other about the connecting shaft.
In the first core piece array layer, a first notch portion opened to the side opposite to the teeth side is formed between the two adjacent first core pieces.
Wherein in the welding step, while melting the different filler metal and the core block connected body, have rows welded to the first notch,
When the core block is viewed along the direction in which the first core piece and the second core piece are laminated, the position of the second core piece coincides with the first notch. , A second auxiliary notch open to the side opposite to the teeth side is formed.
In the welding step, an armature of a rotary electric machine that continuously welds the first notch and the second auxiliary notch while melting a filler material different from the core block connector. How to manufacture an iron core. In the second core piece array layer, a second notch portion opened to the side opposite to the tooth side is formed between the two adjacent second core pieces.
The method for manufacturing an armature core of a rotary electric machine according to claim 9 , wherein in the welding step, welding is performed on the second notch while melting a filler material different from the core block connector. One or more core block connectors having a plurality of core blocks including a back yoke and a tooth protruding from the back yoke, and the back yokes of the plurality of core blocks are sequentially connected to each other are produced. Linkage manufacturing process and
After the connecting body manufacturing step, the welding step of arranging the one or more core block connecting bodies in an annular shape with the teeth facing inward in the radial direction and fixing the two core blocks adjacent to each other by welding.
With
In the one or more core block linkages, one or more first core piece array layers in which each of the plurality of core pieces is arranged as the first core piece, and each of the plurality of core pieces are arranged as the second core piece. It is configured by laminating one or more second core piece array layers.
Each of the plurality of core blocks is configured by laminating the first core piece and the second core piece.
In the one or more core block connecting bodies, the two core blocks adjacent to each other are connected by a rotary connecting portion.
In the rotary connecting portion, the connecting side end portion of the first core piece of one of the core blocks and the connecting side end portion of the second core piece of the other core block overlap each other, and the first The connecting side ends of the core piece 1 and the second core piece are rotatably connected to each other about the connecting shaft.
In the first core piece array layer, a first notch portion opened to the side opposite to the teeth side is formed between the two adjacent first core pieces.
In the welding step, welding is performed on the first notch while melting a filler material different from the core block connecting body.
In the second core piece array layer, a second notch portion opened to the side opposite to the tooth side is formed between the two adjacent second core pieces.
In the welding step, welding is performed on the second notch while melting a filler material different from the core block connector.
When the core block is viewed along the direction in which the first core piece and the second core piece are laminated, the position of the first core piece coincides with the second notch. , A first auxiliary notch open to the side opposite to the teeth side is formed.
Wherein in the welding step, while melting the different filler metal and the core block connected body, said second notch and said first auxiliary cutout line bypass rolling Electric welding continuously to section Manufacturing method of armature iron core. Two core pieces adjacent to each other in at least one of the first core piece array layer and the second core piece array layer are in first and second contact with each other in the circumferential direction of the connecting shaft. The end face is formed and
Of the first and second contact end faces, one is provided with a recess, and the other is provided with a protrusion that fits into the recess.
The method for manufacturing an armature core of a rotary electric machine according to any one of claims 9 to 11 , wherein the recess and the protrusion are arranged along a common arc centered on the connecting shaft.

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