JP6793852B2 - Manufacturing method of core block connector and armature core of rotary electric machine - Google Patents

Description

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

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 problems, and is a core block connector capable of improving productivity and reducing costs, and an armature of a rotary electric machine. The purpose is to obtain a method for manufacturing an iron core.

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 the 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. The 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 welding groove opened to the side opposite to the teeth side is formed between two first core pieces adjacent to each other in the core piece array layer of 1. A first protrusion as a welding material projecting from one of two first core pieces located on both sides of the first notch is arranged in the notch.

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 for fixing two matching core blocks to each other by welding is provided, 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 laminating 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 ends 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 is formed as a welding groove open to, and the first notch is made of either of two first core pieces located on both sides of the first notch. A first protrusion as a welding material protruding from one side is arranged, and in the welding step, welding is performed on the first notch while melting the first protrusion.

According to the method for manufacturing the core block connecting body and the armature core of the rotary electric machine according to the present invention, the first welded portion that fills the first notch portion is formed by melting the first protrusion portion. It can be provided in the notch. Therefore, the depth of the first welded portion can be increased, and the core blocks can be fixed to each other with high strength and high rigidity. As a result, it is possible to form a core block connecting body that maintains an arc shape without using other fixing means. Therefore, the productivity of the armature core can be improved, and 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. It is a top view which shows the 1st core piece array layer in the state which the 1st weld part of FIG. 3 is not provided. It is a top view which shows the 2nd core piece array layer in the state which the 2nd weld part of FIG. 4 is not provided. 6 is a plan view showing a core block connection before welding and fixing, which is formed by laminating the first core piece array layer and the second core piece array layer of FIGS. 6 and 7. It is an enlarged configuration view which shows a part of the core block connection body before welding fixing of FIG. It is a top view which shows the state which the core block connecting body of FIG. 8 is unfolded. FIG. 8 is an enlarged plan view showing a state in which an armature coil is provided on the core block connector before welding and fixing in FIG. 8. It is a top view which shows the state which the core block connecting body before welding fixing of FIG. 11 is arranged in an annular shape. FIG. 5 is a plan view of a main part showing a state in which the core block connecting body before welding and fixing according to the second embodiment of the present invention has an arc shape. It is a top view which shows the core block connecting body in the armature core of the rotary electric machine according to Embodiment 3 of this invention. It is a top view which shows the 2nd core piece array layer in the core block connection body of FIG. It is a block diagram which shows a part of the core block connection body of FIG. It is a top view which shows the core block connecting body before welding fixing which the 1st welding part of FIG. 14 is not provided. It is a top view which shows the 2nd core piece array layer in the core block connecting body before welding fixing of FIG. It is an enlarged configuration view which shows a part of the core block connection body before welding fixing of FIG. FIG. 5 is an enlarged configuration diagram showing a part of a core block connector in an armature core of a rotary electric machine according to a fourth embodiment of the present invention. It is a top view which shows the 1st core piece array layer in the core block connection body of FIG. It is a top view which shows the 2nd core piece array layer in the core block connection body of FIG. It is a top view which shows the core block connecting body before welding fixing which a 1st welding part and a 2nd welding part are not provided of FIG. It is a top view which shows the 1st core piece array layer in the core block connecting body before welding fixing of FIG. It is a top view which shows the 2nd core piece array layer in the core block connecting body before welding fixing of FIG.

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 (not shown). The rotor 3 is arranged coaxially with the rotating shaft 2. Further, 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 and the back yokes 13 being 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.

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. As shown in FIG. 4, each of the plurality of core pieces is arranged as the second core piece 24 on the second core piece array layer 23 laminated by the core block connector 11. 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. In this example, the shape of the first notch 35 is V-shaped.

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. In this example, the shape of the second notch 36 is V-shaped.

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.

FIG. 5 is a configuration diagram showing a part of the core block connector 11 of FIG. The first welded portion 18 is provided in the first notched portion 35. As a result, the first notch portion 35 is filled with the first welded portion 18. In this example, the first welded portion 18 is provided in the first notched portion 35 in four layers at a time. In each core block 12, the first core pieces 22 that overlap each other and the first and second core pieces 22 and 24 that overlap each other are fixed by the first welded portion 18 in the stacking direction. Further, in the core block connecting body 11 of the armature core 7, 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 other core block 12 The first core piece 22 and the first core piece 22 of the above are fixed to each other by the first welded portion 18.

The second welded portion 19 is provided in the second notched portion 36. As a result, the second notch 36 is filled with the second weld 19. In this example, the second welded portion 19 is provided in the second notched portion 36 in four layers at a time. In each core block 12, the second core pieces 24 that overlap each other and the first and second core pieces 22 and 24 that overlap each other are fixed by the second welded portion 19 in the stacking direction. Further, in the core block connecting body 11 of the armature core 7, 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 other core block The second core piece 24 of the twelve is 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, 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 each of the plurality of core pieces is the second core. One or more second core piece array layers 23 arranged as pieces 24 are produced. After that, by laminating and pressing one or more first core piece array layers 21 and one or more second core piece array layers 23, a plurality of core block connectors 11 each having a plurality of core blocks 12 are formed. To make.

The core block connecting body 11 at this time is a core block connecting body before welding fixing in which the first welding portion 18 and the second welding portion 19 are not provided. Therefore, in the core block connecting body 11 before welding fixing, the fixing of the two core blocks 12 connected to each other by the rotary connecting portion 17 is avoided, and each core block 12 freely rotates about the connecting shaft 28. .. As a result, the core block connector 11 before welding and fixing can be deformed by the rotation of each core block 12.

FIG. 6 is a plan view showing a first core piece array layer 21 in a state where the first welded portion 18 of FIG. 3 is not provided. Further, FIG. 7 is a plan view showing a second core piece array layer 23 in a state where the second welded portion 19 of FIG. 4 is not provided. Further, FIG. 8 is a plan view showing a core block connector 11 before welding and fixing, which is formed by laminating the first core piece array layer 21 and the second core piece array layer 23 of FIGS. 6 and 7. Is. Further, FIG. 9 is an enlarged configuration diagram showing a part of the core block connecting body 11 before welding and fixing in FIG.

In the core block connecting body 11 before welding fixing, as shown in FIGS. 8 and 9, each core block 12 can rotate about the connecting shaft 28 in the direction in which the distance between the teeth 14 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 before welding and fixing becomes an arc shape.

In the core block connector 11 before welding and fixing, as shown in FIG. 6, the first contact end face 29 and the second contact end face 30 come into contact with each other between the first core pieces 22, so that each first is contacted with each other. A V-shaped first notch 35 is formed as a welding groove between the back yoke pieces 25 of the core piece 22 of 1. Further, in the core block connector 11 before welding and fixing, as shown in FIG. 7, the first contact end face 31 and the second contact end face 32 come into contact with each other between the second core pieces 24, whereby the first contact end face 31 and the second contact end face 32 come into contact with each other. A V-shaped second notch 36 is formed between the back yoke pieces 25 of each second core piece 24 as a welding groove.

The first notch 35 as a groove for welding has a first as a welding material protruding from either one of two first core pieces 22 located on both sides of the first notch 35. The protrusion 41 is arranged. In this example, as shown in FIG. 6, a first protrusion 41 as a welding material protruding from the receiving side end 25b of the first core piece 22 is arranged in the first notch 35. Further, in this example, the first protrusion 41 projects from the inner surface of the first notch 35 toward the open portion of the first notch 35. Further, in this example, the first core piece 22 and the first protrusion 41 are a single material simultaneously formed by punching a steel plate with a die.

As shown in FIG. 9, the first protruding portion 41 has a widening portion and a connecting portion for connecting the widening portion to the first core piece 22. The width of the widened portion is larger than the width of the connecting portion. As a result, the shape of the first protrusion 41 is constricted at the position of the connecting portion.

The second notch 36 as a welding groove has a second as a welding material protruding from either one of the two second core pieces 24 located on both sides of the second notch 36. The protrusion 42 is arranged. In this example, as shown in FIG. 7, a second protrusion 42 as a welding material protruding from the receiving side end 25b of the second core piece 24 is arranged in the second notch 36. Further, in this example, the second protrusion 42 projects from the inner surface of the second notch 36 toward the open portion side of the second notch 36. Further, in this example, the second core piece 24 and the second protrusion 42 are a single material simultaneously formed by punching a steel plate with a die.

As shown in FIG. 9, the second protruding portion 42 has a widening portion and a connecting portion for connecting the widening portion to the second core piece 24. The width of the widened portion is larger than the width of the connecting portion. As a result, the shape of the second protrusion 42 is constricted at the position of the connecting portion.

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.

FIG. 10 is a plan view showing a state in which the core block connector 11 of FIG. 8 is deployed. When the core block connector 11 is unfolded, of the two core blocks 12 connected to each other by the rotary coupling portion 17, the first protrusion 41 of one core block 12 becomes the first of the other core block 12. There is a risk of interfering with the core piece 22 and the second protrusion 42 of the other core block 12 interfering with the second core piece 24 of the one core block 12. Therefore, as shown in FIG. 6, a first recessed portion 51 for avoiding interference with the first protruding portion 41 is provided on the outer peripheral portion of the back yoke piece 25 of the first core piece 22. Further, as shown in FIG. 7, a second recessed portion 52 for avoiding interference with the second protruding portion 42 is provided on the outer peripheral portion of the back yoke piece 25 of the second core piece 24.

The first protrusion 41 and the first recess 51 are provided on a common arc centered on the connecting shaft 28. The second protrusion 42 and the second recess 52 are provided on a common arc centered on the connecting shaft 28.

(Armor coil installation process)
After the connecting body manufacturing step, as shown in FIG. 10, the core block connecting body 11 before welding and fixing is formed by rotating the core blocks 12 with respect to the connecting shaft 28 in the direction in which the distance between the teeth 14 increases. expand. After that, in a state where the core block connecting body 11 is expanded, a conducting wire is wound around the teeth 14 via an insulator. As a result, the armature coil 8 is provided on each tooth 14.

(Welding process)
After the armature coil installation step, the core blocks 12 are rotated around the connecting shaft 28 to return the unfolded state of the core block connecting body 11, and as shown in FIG. 11, the core block connecting body 11 before welding fixing Make the shape arcuate. After that, one or more arcuate core block connecting bodies 11 provided with armature coils 8 are arranged in an annular shape with the teeth 14 facing inward in the radial direction. In this example, as shown in FIG. 12, four core block connectors 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 first notch 35 while melting the first protrusion 41 so as to fill the first notch 35 from the outer peripheral side of the core block connector 11. As a result, the first welded portion 18 is provided in the first notched portion 35. In this example, welding performed while melting the first protrusion 41 is performed collectively for each of the four first core piece array layers 21.

Further, welding is performed on the second notch 36 while melting the second protrusion 42 so as to fill the second notch 36 from the outer peripheral side of the core block connector 11. As a result, the second welded portion 19 is provided in the second notched portion 36. In this example, welding performed while melting the second protrusion 42 is performed collectively for each of the four second core piece array layers 23. 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 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 such a core block connector 11, a first notch opened to the side opposite to the teeth 14 side between two first core pieces 22 adjacent to each other in the first core piece array layer 21. A portion 35 is formed, and a first protrusion 41 as a welding material protruding from the first core piece 22 is arranged in the first notch 35. Therefore, by melting the first protrusion 41, the first welded portion 18 for filling the first notch 35 can be provided in the first notch 35. As a result, it is not necessary to separately prepare a filler material such as a solid wire at the time of welding, and the first welded portion 18 can be easily and inexpensively provided in the first notched portion 35. Further, since the first protrusion 41 protrudes from the first core piece 22, the first protrusion 41 can be positively melted. As a result, heat transfer to the first core piece 22 can be suppressed, and the entire core block connector 11 can be made less susceptible to adverse effects due to welding strain. Therefore, the core block connector 11 can be made difficult to be deformed at the time of welding. Further, 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. be able to. As a result, the core block connecting body 11 that maintains an arc shape without using other fixing means can be more easily formed, and for example, the work of fitting the armature core 7 to 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, 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, and a second protrusion 42 as a welding material protruding from the second core piece 24 is arranged in the second notch 36. Therefore, by melting the second protrusion 42, a second welded portion 19 for filling the second notch 36 can be provided in the second notch 36, and the second notch 36 can be provided. The second weld 19 can be easily and inexpensively provided on the 36. Further, since the second protrusion 42 protrudes from the second core piece 24, the second protrusion 42 can be positively melted. As a result, heat transfer to the second core piece 24 can be suppressed, and the entire core block connector 11 can be made less susceptible to adverse effects due to welding strain. Therefore, the core block connector 11 can be made difficult to be deformed at the time of welding. Further, 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 higher strength and rigidity. can do. This makes it possible to more reliably form the core block connecting body 11 that maintains an arc shape 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, the first protrusion 41 protrudes from the inner surface of the first notch 35. Therefore, the first protrusion 41 can be melted in the first notch 35, and the first weld 18 can be easily and more reliably provided in the first notch 35. ..

Further, the second protrusion 42 protrudes from the inner surface of the second notch 36. Therefore, the second protrusion 42 can be melted in the second notch 36, and the second weld 19 can be easily and more reliably provided in the second notch 36. ..

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 in which welding is performed while melting the first protrusion 41. Therefore, the first protrusion 41 can be melted so as to fill the first notch 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 first protrusion 41, heat transfer to the entire armature core 7 can be suppressed, and the entire armature core 7 has an adverse effect due to welding strain. It can be difficult to receive. 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 melting the second protrusion 42 into the second notch 36 formed between the two adjacent second core pieces 24. Therefore, the second protrusion 42 can be melted 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 by welding in each of the first notch portion 35 and the second notch portion 36, and other fixing means can be fixed. It is possible to more reliably form the armature iron core 7 that maintains an annular shape without using it.

Embodiment 2.
FIG. 13 is a plan view of a main part showing a state in which the core block connecting body before welding and fixing according to the second embodiment of the present invention has an arc shape. In the core block connecting body 11 before welding fixing, the first protruding portion 41 as a welding material protrudes from the connecting side end portion 25a of the first core piece 22. The first protrusion 41 is arranged in the first notch 35 as a welding groove. In this example, the first protrusion 41 projects from the inner surface of the first notch 35 toward the open portion of the first notch 35. Further, in this example, the first core piece 22 and the first protrusion 41 are a single material simultaneously formed by punching a steel plate with a die. Further, in this example, the shape of the first protrusion 41 is a pointed shape that continuously narrows toward the tip.

Further, in the core block connecting body 11 before welding fixing, the second protruding portion 42 as a welding material protrudes from the connecting side end portion 25a of the second core piece 24. The second protrusion 42 is arranged in the second notch 36 as a welding groove. In this example, the second protrusion 42 projects from the inner surface of the second notch 36 toward the open portion of the second notch 36. Further, in this example, the second core piece 24 and the second protrusion 42 are a single material simultaneously formed by punching a steel plate with a die. Further, in this example, the shape of the second protrusion 42 is a pointed shape that continuously narrows toward the tip. Other configurations of the core block connector 11 before welding fixing are the same as those in the first embodiment.

The method for manufacturing the armature iron core of the rotary electric machine is the same as that in the first embodiment. In the welding step, the first welded portion 18 is provided in the first notched portion 35 by welding the first notched portion 35 while melting the first protrusion 41. Further, in the welding step, the second welded portion 19 is provided in the second notch 36 by welding the second notch 36 while melting the second protrusion 42. The configuration of the armature core 7 and the configuration of the rotary electric machine 1 are the same as those in the first embodiment.

In this way, even if the first protrusion 41 as a welding material is projected from the connecting side end portion 25a of the first core piece 22, the first protrusion 41 is melted and the first notch portion 35 is formed. The first welded portion 18 can be provided in the first notched portion 35 by filling the above. Therefore, as in the first embodiment, the productivity of the armature core 7 can be improved, and the cost of the armature core 7 can be reduced. In this way, if the first protrusion 41 protruding from one of the two first core pieces 22 located on both sides of the first notch 35 is arranged in the first notch 35, The first welded portion 18 can be provided in the first notched portion 35.

Further, even if the second protrusion 42 as a welding material is projected from the connecting side end portion 25a of the second core piece 24, the second protrusion 42 is melted to fill the second notch 36. As a result, the second welded portion 19 can be provided in the second notched portion 36. Therefore, as in the first embodiment, the productivity of the armature core 7 can be improved, and the cost of the armature core 7 can be reduced. In this way, if the second protrusion 42 protruding from any one of the two second core pieces 24 located on both sides of the second notch 36 is arranged in the second notch 36, A second weld 19 can be provided in the second notch 36.

In the first and second embodiments, the first protrusion 41 protruding from the first core piece 22 is arranged in the first notch 35, and the second protrusion protruding from the second core piece 24. The portion 42 is arranged in the second notch portion 36. However, the first protrusion 41 protruding from the first core piece 22 may be arranged in the first notch 35 without projecting the second protrusion 42 from the second core piece 24. .. In this case, without welding to the second notch 36, welding is performed to the first notch 35 while melting the first protrusion 41. Therefore, in this case, the two core blocks 12 connected by the rotary connecting portion 17 are fixed only by the first welded portion 18.

Embodiment 3.
FIG. 14 is a plan view showing a core block connector 11 in an armature core of a rotary electric machine according to a third embodiment of the present invention. Further, FIG. 15 is a plan view showing a second core piece array layer 23 in the core block connection 11 of FIG. The configuration of the first core piece array layer 21 according to the present embodiment is the same as the configuration of the first core piece array layer 21 shown in FIG. 3 of the first embodiment.

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 15, 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. 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.

FIG. 16 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 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 fixed in the stacking direction by the first welded portion 18. Has been done. The first notch 35 and the second auxiliary notch 37 are filled with the first weld 18. In the core block connecting body 11 of the armature core 7, the two core blocks 12 connected to each other by the rotating connecting portion 17 are fixed to each other by the first welded portion 18.

In this example, the first weld 18 is continuously provided in the first notch 35 and the first auxiliary notch 37 over all the core piece array layers 21 and 23 in the core block connector 11. There is. Further, in this example, the second welded portion 19 is not provided on the second core piece array layer 23. Other configurations are the same as those in the first embodiment.

Next, a method of manufacturing the armature 4 will be described.
(Connected body manufacturing process)
First, by punching a steel plate with a die in the same manner as in the first embodiment, one or more first core piece array layers 21 in which a plurality of first core pieces 22 are lined up, and a plurality of second core pieces 24 Each of one or more second core piece array layers 23 in which is lined up is 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.

FIG. 17 is a plan view showing a core block connecting body 11 before welding and fixing in which the first welding portion 18 of FIG. 14 is not provided. Further, FIG. 18 is a plan view showing a second core piece array layer 23 in the core block connector 11 before welding and fixing in FIG. Further, FIG. 19 is an enlarged configuration diagram showing a part of the core block connecting body 11 before welding and fixing in FIG. The configuration of the first core piece array layer 21 in the core block connector 11 before welding fixing is the same as the configuration of the first core piece array layer 21 shown in FIG. 6 of the first embodiment.

In the core block connecting body 11 before welding fixing, as shown in FIG. 18, the second auxiliary protrusion 43 protrudes from the second core piece 24 in which the second auxiliary notch 37 is formed. The second auxiliary protrusion 43 is arranged in the second auxiliary notch 37. In this example, the second auxiliary protrusion 43 projects from the inner surface of the second auxiliary notch 37 toward the open portion. Further, in this example, the second core piece 24 and the second auxiliary protrusion 43 are made of a single material simultaneously formed by punching a steel plate with a die.

The second auxiliary protrusion 43 has a widening portion and a connecting portion for connecting the widening portion to the second core piece 24. The width of the widened portion is larger than the width of the connecting portion. As a result, the shape of the second auxiliary protrusion 43 is constricted at the position of the connecting portion.

When the shape of the core block connecting body 11 before welding fixing becomes an arc shape, when viewed along the direction in which the first and second core pieces 22 and 24 are laminated, a V-shaped second auxiliary cutting The notch 37 coincides with the position of the first notch 35. When the shape of the core block connecting body 11 before welding and fixing is arcuate, when viewed along the direction in which the first and second core pieces 22 and 24 are laminated, as shown in FIG. In addition, a part of each of the first protrusion 41 and the second auxiliary protrusion 43 overlaps with each other. In this example, when viewed along the direction in which the first and second core pieces 22, 24 are laminated, the first protrusion 41 and the second auxiliary protrusion 43 intersect each other in the respective directions. It is protruding.

(Armor coil installation process)
After the connecting body manufacturing step, the armature coil 8 is provided in each tooth 14 in the same manner as in the first embodiment.

(Welding process)
After the armature coil installation step, one or more core block connectors 11 before welding and fixing, each of which is provided with the armature coil 8, are arranged in an annular shape. In this example, the four core block connectors 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.

As shown in FIG. 16, welding is performed over all the core piece array layers 21 and 23 in the core block connection 11 from the outer peripheral side of the core block connection 11 to the first protrusion 41 and the second auxiliary protrusion 43. Is continuously applied to the first notch 35 and the second auxiliary notch 37 while melting. As a result, the first welded portion 18 is provided in the first notched portion 35 and the second auxiliary notch portion 37. The shape of the core block connector 11 is fixed in an arc shape by the first welded portion 18.

Further, welding is also performed on the boundary between the two core block connecting bodies 11 adjacent to each other in the same manner as in the first embodiment. 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 such a 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 in the second core piece 24 is formed. A second auxiliary notch 37 is formed at a position corresponding to the portion 35, and a second auxiliary protrusion 43 as a welding material protruding from the second core piece 24 is arranged in the second auxiliary notch 37. Has been done. Therefore, by melting the first protrusion 41 and the second auxiliary protrusion 43, the first notch 35 and the second auxiliary notch 37 are filled with each other in succession. The welded portion 18 of the above can be provided. 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, since it is not necessary to separately prepare a filler material such as a solid wire at the time of welding, the first welded portion 18 can be easily and inexpensively provided in the first notched portion 35 and the second auxiliary notched portion 37. Can be provided.

Embodiment 4.
FIG. 20 is an enlarged configuration diagram showing a part of the core block connector 11 in the armature core of the rotary electric machine according to the fourth embodiment of the present invention. 21 is a plan view showing the first core piece array layer 21 in the core block connection 11 of FIG. 20. Further, FIG. 22 is a plan view showing a second core piece array layer 23 in the core block connection 11 of FIG. 20.

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 22, 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. 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 21, 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. 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.

As shown in FIG. 20, the first welded portion 18 is continuously provided in the first notch portion 35 and the second auxiliary notch portion 37. Further, the second welded portion 19 is continuously provided in the second notched portion 36 and the first auxiliary notched portion 38. As a result, 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 welded to the first welded portion 18 and the second weld. It is fixed in the stacking direction by the portion 19. The first notch 35 and the second auxiliary notch 37 are filled with the first weld 18. The second notch 36 and the first auxiliary notch 38 are filled with a second weld 19. In the core block connecting body 11 of the armature core 7, the two core blocks 12 connected to each other by the rotating connecting portion 17 are fixed to each other by the first welding portion 18 and the second welding portion 19.

In this example, the first weld 18 is continuously provided in the first notch 35 and the first auxiliary notch 37 over all the core piece array layers 21 and 23 in the core block connector 11. There is. Further, in this example, the second welded portion 19 is continuously provided in the second notch 36 and the second auxiliary notch 38 over all the core piece array layers 21 and 23 in the core block connector 11. Has been done. Other configurations are the same as those in the first embodiment.

Next, a method of manufacturing the armature 4 will be described.
(Connected body manufacturing process)
First, by punching a steel plate with a die in the same manner as in the first embodiment, one or more first core piece array layers 21 in which a plurality of first core pieces 22 are lined up, and a plurality of second core pieces 24 Each of one or more second core piece array layers 23 in which is lined up is 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.

FIG. 23 is a plan view showing a core block connecting body 11 before welding fixing in which the first welding portion 18 and the second welding portion 19 of FIG. 20 are not provided. Further, FIG. 24 is a plan view showing the first core piece array layer 21 in the core block connecting body 11 before welding and fixing in FIG. 23. Further, FIG. 25 is a plan view showing a second core piece array layer 23 in the core block connector 11 before welding fixing of FIG. 23.

In the core block connecting body 11 before welding fixing, as shown in FIG. 25, a second auxiliary protrusion 43 protruding from the second core piece 24 is arranged in the second auxiliary notch 37. In this example, the second auxiliary protrusion 43 projects from the inner surface of the second auxiliary notch 37 toward the open portion. Further, in this example, the second core piece 24, the second protrusion 42, and the second auxiliary protrusion 43 are made of a single material simultaneously formed by punching a steel plate with a die.

In the core block connecting body 11 before welding fixing, as shown in FIG. 24, a first auxiliary protrusion 44 protruding from the first core piece 22 is arranged in the first auxiliary notch 38. In this example, the first auxiliary protrusion 44 projects from the inner surface of the first auxiliary notch 38 toward the open portion. Further, in this example, the first core piece 22, the first protrusion 41, and the first auxiliary protrusion 44 are a single material formed at the same time by punching a steel plate with a die.

The second auxiliary protrusion 43 has a widening portion and a connecting portion for connecting the widening portion to the second core piece 24. The width of the widened portion is larger than the width of the connecting portion. As a result, the shape of the second auxiliary protrusion 43 is constricted at the position of the connecting portion.

The first auxiliary protrusion 44 has a widening portion and a connecting portion for connecting the widening portion to the first core piece 22. The width of the widened portion is larger than the width of the connecting portion. As a result, the shape of the first auxiliary protrusion 44 is constricted at the position of the connecting portion.

When the shape of the core block connector 11 before welding fixing becomes an arc shape, when viewed along the direction in which the first and second core pieces 22 and 24 are laminated, a V-shaped second auxiliary cutting The notch 37 coincides with the position of the first notch 35, and the V-shaped first auxiliary notch 38 coincides with the position of the second notch 36. In a state where the shape of the core block connecting body 11 before welding fixing is arcuate, as shown in FIG. 23 when viewed along the direction in which the first and second core pieces 22 and 24 are laminated. In addition, a part of each of the first protrusion 41 and the second auxiliary protrusion 43 overlaps with each other, and a part of each of the second protrusion 42 and the first auxiliary protrusion 44 overlaps with each other. There is. In this example, when viewed along the direction in which the first and second core pieces 22, 24 are laminated, the first protrusion 41 and the second auxiliary protrusion 43 intersect each other, respectively. It protrudes, and the second protrusion 42 and the first auxiliary protrusion 44 project in the directions in which they intersect each other.

(Armor coil installation process)
After the connecting body manufacturing step, the armature coil 8 is provided in each tooth 14 in the same manner as in the first embodiment.

(Welding process)
After the armature coil installation step, one or more core block connectors 11 before welding and fixing, each of which is provided with the armature coil 8, are arranged in an annular shape. In this example, the four core block connectors 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.

As shown in FIG. 20, welding is performed over all the core piece array layers 21 and 23 in the core block connection 11, from the outer peripheral side of the core block connection 11 to the first protrusion 41 and the second auxiliary protrusion 43. Is continuously applied to the first notch 35 and the second auxiliary notch 37 while melting. Further, in the welding, the second protrusion 42 and the first auxiliary protrusion 44 are melted from the outer peripheral side of the core block connection 11 over all the core piece array layers 21 and 23 in the core block connection 11. This is performed continuously on the notch 36 of 2 and the first auxiliary notch 38. As a result, the first welded portion 18 is provided in the first notch 35 and the second auxiliary notch 37, and the second notch 36 and the first auxiliary notch 38 are provided with the first welded portion 18. The welded portion 19 of 2 is provided. 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 in the same manner as in the first embodiment. 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 such a 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 in the second core piece 24 is formed. A second auxiliary notch 37 is formed at a position corresponding to the portion 35, and a first auxiliary notch 38 is formed at a position corresponding to the second notch 36 in the first core piece 22. There is. Further, a second auxiliary protrusion 43 as a welding material protruding from the second core piece 24 is arranged in the second auxiliary notch 37, and the first welding material protruding from the first core piece 22 is provided. Auxiliary protrusion 44 is arranged in the first auxiliary notch 38. Therefore, the first protrusion 41 and the second auxiliary protrusion 43 are melted so as to continuously fill each of the first notch 35 and the second auxiliary notch 37. A welded portion 18 can be provided. In addition, the second welding is performed so as to continuously fill each of the second notch 36 and the first auxiliary notch 38 by melting the second protrusion 42 and the first auxiliary protrusion 44. A portion 19 can be provided. 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, since it is not necessary to separately prepare a filler metal such as a solid wire at the time of welding, the first welded portion 18 and the second welded portion 19 can be provided easily and at low cost.

In the above example, the second auxiliary notch 37 is formed in the second core piece 24, and the second auxiliary protrusion 43 protrudes from the second core piece 24. However, the second auxiliary notch 37 and the second auxiliary protrusion 43 may be omitted. In this case, the first welded portion 18 is provided only in the first notched portion 35, avoiding the second core piece 24.

Further, in the above example, the first auxiliary notch 38 is formed in the first core piece 22, and the first auxiliary protrusion 44 protrudes from the first core piece 22. However, the first auxiliary notch 38 and the first auxiliary protrusion 44 may not be present. In this case, the second welded portion 19 is provided only in the second notched portion 36, avoiding the first core piece 22.

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.

11 core block connection, 12 core block, 13 back yoke, 14 teeth, 17 rotation connection, 21 first core piece array layer, 22 first core piece, 23 second core piece array layer, 24 second Core piece, 25a connecting side end, 28 connecting shaft, 35 first notch, 36 second notch, 37 second auxiliary notch, 38 first auxiliary notch, 41th 1 protrusion, 42 second protrusion, 43 second auxiliary protrusion, 44 first auxiliary protrusion.

Claims (8)

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. Being done
In the first notch, a first protrusion as a welding material projecting from one of two of the two first core pieces located on both sides of the first notch is arranged .
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 as a welding groove opened to the side opposite to the teeth side is formed.
In the second auxiliary notch, a core block in which a second auxiliary protrusion as a welding material projecting from the second core piece on which the second auxiliary notch is formed is arranged. Connected body. 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. Being done
In the second notch, a second protrusion as a welding material that protrudes from any one of the two second core pieces located on both sides of the second notch is arranged. The core block connector according to claim 1 . 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
In the first notch, a first protrusion as a welding material projecting from one of two of the two first core pieces located on both sides of the first notch is arranged.
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. Being done
In the second notch, a second protrusion as a welding material protruding from one of the two second core pieces located on both sides of the second notch is arranged.
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 as a welding groove opened to the side opposite to the teeth side is formed.
Wherein the first auxiliary notch, the first of the first auxiliary protrusions are arranged Turkey A as welding material auxiliary notch projects from said first core piece being formed Block connector. The core block connecting body according to any one of claims 1 to 3 , wherein the welding material projects from the inner surface of the welding groove. 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.
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
In the first notch, a first protrusion as a welding material projecting from one of two of the two first core pieces located on both sides of the first notch is arranged.
In the welding step, while melting the first protrusion, 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 as a welding groove opened to the side opposite to the teeth side is formed.
In the second auxiliary notch, a second auxiliary protrusion as a welding material protruding from the second core piece on which the second auxiliary notch is formed is arranged.
In the welding step, the rotary electric machine that continuously welds the first notch and the second auxiliary notch while melting the first protrusion and the second auxiliary protrusion . Manufacturing method of armature iron core. 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. Being done
In the second notch, a second protrusion as a welding material protruding from one of the two second core pieces located on both sides of the second notch is arranged.
The method for manufacturing an armature core of a rotary electric machine according to claim 5 , wherein in the welding step, the second notch is welded while melting the second protrusion. 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.
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
In the first notch, a first protrusion as a welding material projecting from one of two of the two first core pieces located on both sides of the first notch is arranged.
In the welding step, welding is performed on the first notch while melting the first protrusion.
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. Being done
In the second notch, a second protrusion as a welding material protruding from one of the two second core pieces located on both sides of the second notch is arranged.
In the welding step, welding is performed on the second notch while melting the second protrusion.
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 as a welding groove opened to the side opposite to the teeth side is formed.
In the first auxiliary notch, a first auxiliary protrusion as a welding material protruding from the first core piece on which the first auxiliary notch is formed is arranged.
Wherein in the welding step, the second protrusion and while melting the first auxiliary protrusion and the second notch portion and the first continuously welded line bypass rolling the auxiliary notch Manufacturing method of armature iron core of electric machine. The method for manufacturing an armature core of a rotary electric machine according to any one of claims 5 to 7 , wherein the welding material projects from the inner surface of the welding groove.

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