JP2011114876A - Stator core for rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a stator core for a rotary electric machine which is high in yield of materials at manufacture and is superior in productivity without the occurrence of trouble in an apparatus. <P>SOLUTION: The stator core for the rotary electric machine is manufactured by alternately stacking first core members, where first core pieces with one sides as first edges and the other edges as second edges are arrayed linearly, and second core members, where second core pieces with one sides as second edges and the other end sides as first edges are arrayed linearly, and is formed in annular form by rotating each core piece. The first edge of each core piece includes an annular convex, a first abutment, and a matching hole, and the second edge includes a concave engageable with the convex, a second abutment, and a matching hole. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In the present invention, by laminating a band-shaped core member in which a plurality of core pieces are joined via a connecting portion so that adjacent edges overlap each other in the stacking direction of each core piece, and rotating the connecting portion The present invention relates to a stator core for a rotating electrical machine formed in an annular shape, and particularly relates to a stator core for a rotating electrical machine composed of an end face-shaped core piece excellent in productivity.

A stator core (referred to as a stator core) of a conventional rotating electrical machine is formed by punching core pieces arranged in an annular shape from a metal sheet with a press, and stacking the punched core pieces (see, for example, Patent Document 1).
Further, the core pieces arranged in an arc shape are punched out of a metal sheet with a press, and the punched core pieces are laminated (see, for example, Patent Document 2).
However, in a stator core formed of core pieces arranged in an annular shape or core pieces arranged in an arc shape, the outer shape of the arranged core pieces is circular or arc shape, and the inner circumference of the arranged core pieces On the side, since a region for housing the rotor is necessary when the core is formed, there are many portions that become scrap when the metal sheet is punched, and there is a problem that the material yield at the time of manufacturing the stator core is lowered.

A stator core that eliminates such problems is formed by punching core pieces arranged in a straight line from a metal sheet with a press, stacking the punched core pieces, and rotating the stacked core pieces. There is.
As a stator core formed by using such linearly arranged core pieces, the entire end face on one end side is a convex circle shape, and the entire end face on the other end side is fitted with the end face on one end side of the adjacent core pieces. Some are formed of core pieces that are concave arc shapes that can be joined, and others are formed by core pieces connected via thin-walled portions (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2000-116074 (Page 2, Page 3, Page 5, Figure 3, Figure 7, Figure 16) JP 2002-272027 A (3rd page, 4th page, FIG. 4)

A stator core formed of a core piece having a concave arc shape that can be fitted to one end side end face of an adjacent core piece, the entire end face on one end side having a convex circular shape, and laminated. Since the core piece rotates more than necessary, there is a problem that it is not easy to form the stator core in an annular shape.
A stator core formed of core pieces connected via a thin-walled portion has contact portions formed on both end surfaces on one end side and the other end side in the longitudinal direction of the core piece, and can prevent unnecessary rotation. The stator core can be easily formed. However, this stator core is formed by bending the thin portions of the core pieces arranged in a straight line into an annular shape. Therefore, if the stator core is bent several times, the mechanical strength of the thin portions of the core pieces decreases and becomes defective. There was a problem that the yield decreased.

The abutting portion of the end face of the core piece is formed by punching out from a metal sheet with a wedge-shaped gap between adjacent core pieces in a linearly arranged core piece.
However, when the core pieces arranged in a straight line in this way are punched from a metal sheet with a wedge-shaped gap between adjacent core pieces and pressed, a drop occurs. And, this removal has a problem of causing damage to the workpiece and troubles caused by mixing into the press machine.
In addition, a mold used for punching out a minute region such as a wedge-shaped gap between adjacent core pieces has a problem that it is fine, has a low mold strength, and has a short life.

  The present invention has been made to solve the above-described problems, and its purpose is that the yield of products and materials is high at the time of manufacture, the occurrence of equipment troubles can be prevented, and the mold life can be reduced. An object of the present invention is to obtain a stator core of a rotating electrical machine that is not lowered and has excellent productivity.

  A stator core of a rotating electrical machine according to the present invention includes a first core member that linearly arranges a plurality of plate-like first core pieces from which magnetic teeth are projected, and a plate-like second member from which magnetic teeth are projected. The second core members in which a plurality of core pieces are arranged in a straight line are alternately arranged in the stacking direction between the first core pieces between the first core members and the second core members. The position between the core pieces is shifted in the longitudinal direction, the adjacent edges in the stacking direction of each core piece are stacked so as to overlap each other, and connecting means for connecting the adjacent edges in the stacking direction is provided, By rotating each core piece by the connecting means, the stator core of the rotating electrical machine formed in an annular shape, the first core piece has a first end face and a first notch on one end side in the longitudinal direction. And a second end face and a second notch are provided on the other end side in the longitudinal direction. The piece is provided with a second end face and a second notch on one end side in the longitudinal direction, and provided with a first end face and a first notch on the other end side in the longitudinal direction. Is a projecting portion provided in an arc shape around the connecting means formed at the end of each core piece, and a first abutting portion provided on the inner peripheral side of each core piece continuously from the projecting portion And an arcuate matching hole provided at a contact point between the protruding portion and the first contact portion, and the second end surface is a recessed portion that can be fitted to the protruding portion of each adjacent core piece, A second abutting portion provided on the inner peripheral side of each core piece continuously from the depression, and an arcuate matching hole provided at a contact point between the depression and the second abutting portion, The first notch is formed at the outer peripheral side end of the protruding portion, the second notch is formed at the outer peripheral side end of the recessed portion, and the first and second core members arranged linearly are respectively core When the gap between the first abutting portion and the second abutting portion of each adjacent core piece is wedge-shaped, each core piece is formed into an annular shape by rotating each core piece by the connecting means. The first contact portion and the second contact portion of each adjacent core piece are in contact with each other.

  A stator core of a rotating electrical machine according to the present invention includes a first core member that linearly arranges a plurality of plate-like first core pieces from which magnetic teeth are projected, and a plate-like second member from which magnetic teeth are projected. The second core members in which a plurality of core pieces are arranged in a straight line are alternately arranged in the stacking direction between the first core pieces between the first core members and the second core members. The position between the core pieces is shifted in the longitudinal direction, the adjacent edges in the stacking direction of each core piece are stacked so as to overlap each other, and connecting means for connecting the adjacent edges in the stacking direction is provided, By rotating each core piece by the connecting means, the stator core of the rotating electrical machine formed in an annular shape, the first core piece has a first end face and a first notch on one end side in the longitudinal direction. And a second end face and a second notch are provided on the other end side in the longitudinal direction. The piece is provided with a second end face and a second notch on one end side in the longitudinal direction, and provided with a first end face and a first notch on the other end side in the longitudinal direction. Is a projecting portion provided in an arc shape around the connecting means formed at the end of each core piece, and a first abutting portion provided on the inner peripheral side of each core piece continuously from the projecting portion And an arcuate matching hole provided at a contact point between the protruding portion and the first contact portion, and the second end surface is a recessed portion that can be fitted to the protruding portion of each adjacent core piece, A second abutting portion provided on the inner peripheral side of each core piece continuously from the depression, and an arcuate matching hole provided at a contact point between the depression and the second abutting portion, The first notch is formed at the outer peripheral side end of the protruding portion, the second notch is formed at the outer peripheral side end of the recessed portion, and the first and second core members arranged linearly are respectively core When the gap between the first abutting portion and the second abutting portion of each adjacent core piece is wedge-shaped, each core piece is formed into an annular shape by rotating each core piece by the connecting means. Since the first abutting portion and the second abutting portion of each adjacent core piece are in contact with each other, the yield of products and materials during manufacturing is high, and the occurrence of device troubles is prevented. It does not reduce the mold life and is excellent in productivity.

It is a perspective schematic diagram of the stator core of the rotary electric machine concerning Embodiment 1 of this invention. The partial front schematic diagram (a) of the linear first core member and the partial front schematic diagram (b) of the linear second core member relating to the stator core of the rotating electrical machine according to the first embodiment of the present invention. It is. The partial front schematic diagram (a) which shows the contact state of the adjacent 1st core pieces in the linear 1st core member regarding the stator core of the rotary electric machine of Embodiment 1 of this invention, and linear 1st It is a partial front schematic diagram (b) which shows the contact state of the adjacent 2nd core pieces in 2 core members. It is a top view which shows the process of forming the core member concerning the stator core of the rotary electric machine of Embodiment 1 of this invention by press punching. The partial front schematic diagram (a) which shows the contact state of the adjacent 1st core pieces in the linear 1st core member regarding the stator core of the rotary electric machine of Embodiment 2 of this invention, and linear 1st It is a partial front schematic diagram (b) which shows the contact state of the adjacent 2nd core pieces in 2 core members. It is a fragmentary perspective schematic diagram of the stator core of the rotary electric machine concerning Embodiment 2 of this invention. The partial front schematic diagram (a) which shows the contact state of the adjacent 1st core pieces in the linear 1st core member regarding the stator core of the rotary electric machine of Embodiment 3 of this invention, and linear 1st It is a partial front schematic diagram (b) which shows the contact state of the adjacent 2nd core pieces in 2 core members. It is a partial perspective schematic diagram of the stator core of the rotary electric machine concerning Embodiment 3 of this invention. It is a front schematic diagram which shows the state which mounted | wore the stator core of the rotary electric machine of Embodiment 3 of this invention with the flame | frame. It is a figure which shows the mechanism in which a flame | frame is fixed to the stator core of the rotary electric machine of Embodiment 3 of this invention by a fixing member.

Embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a schematic perspective view of a stator core of a rotating electrical machine according to Embodiment 1 of the present invention.
As shown in FIG. 1, a stator core (referred to as a stator core) 100 of a rotating electrical machine according to the present embodiment includes first core members 11 described later and second core members 12 described later alternately stacked. It is arranged in an annular shape and is fixed by punching.
FIG. 2 is a partial front schematic diagram (a) of a linear first core member and a partial front schematic diagram of a linear second core member related to the stator core of the rotating electrical machine according to the first embodiment of the present invention. (B).
FIG. 3 is a partial front schematic view (a) showing a contact state between adjacent first core pieces in a linear first core member, related to the stator core of the rotating electrical machine according to the first embodiment of the present invention; It is a partial front schematic diagram (b) which shows the contact state of adjacent 2nd core pieces in a linear 2nd core member.

As shown in FIG. 2A, the linear first core member 11 includes a plurality of plate-shaped first core pieces 1 made of a magnetic material from which the magnetic pole teeth 1a protrude. Is formed.
As shown in FIG. 2A and FIG. 3A, each first core piece 1 is provided with a first end face 6 and a first notch 5 on one end side in the longitudinal direction. A second end face 8 and a second notch 7 are provided on the other end side in the direction. Moreover, the 1st core piece 1 is provided with the recessed part 3 and the convex part 4 as a connection means in the back surface of the 1st end surface side edge part. Further, the first core piece 1 is provided with a blanking portion 9 for connecting the laminated core members.

As shown in FIGS. 2A and 3A, the first end face 6 of each first core piece 1 is in contact with the second end face 8 of the adjacent first core piece 1. .
The first end face 6 has a protruding portion 6a formed in an arc shape centering on the concave portion 3 and the convex portion 4 provided as connecting means, and the magnetic pole teeth 1a of the first core piece 1 protrude. It is provided in the corner | angular part of the outer peripheral side which is the opposite side to the side which is. The first core piece 1 is adjacent to the first end face 6 when the first core piece 1 is rotated around the concave and convex portions 3 and 4 to make the first core member 11 annular. A first abutting portion 6b that abuts against the second end face 8 is provided on the inner peripheral side, which is the side from which the magnetic pole teeth 1a of the first core piece 1 protrude. An arc-shaped matching hole 6c is provided at the contact point between the protruding portion 6a and the first contact portion 6b. And the 1st notch 5 is formed in the outer peripheral side end of the protrusion part 6a.

Further, the second end surface 8 of the first core piece 1 has a recess 8a that can be fitted to the protruding portion 6a of the first end surface 6 of the adjacent first core piece 1. 1 is provided on the outer peripheral side. Further, the second end face 8 is provided with a second contact portion 8 b that contacts the first contact portion 6 b of the adjacent first core piece 1 on the inner peripheral side of the first core piece 1. It has been. An arc-shaped matching hole 8c is provided at the contact point between the recess 8a and the second contact portion 8b. And the 2nd notch 7 is formed in the outer peripheral side end of the hollow part 8a.
Further, the first core member 11 in which the first core pieces 1 are arranged in a straight line rotates the first core piece 1 around the concave and convex portions 3 and 4 provided as connecting means. Therefore, a gap is provided between the first contact portion 6b of the first core piece 1 and the second contact portion 8b of the adjacent first core piece 1, and the gap The first abutting portion 6b is inclined so that the shape becomes a wedge shape. That is, the 1st contact part 6b inclines in the direction which approaches the teeth 1a toward the inner peripheral side.

As shown in FIG. 2B, the second core member 12 is formed by arranging a plurality of plate-like second core pieces 2 made of a magnetic material from which the magnetic pole teeth 2a protrude. Yes.
As shown in FIG. 2B and FIG. 3B, the second core piece 2 has a second end face 8 whose one end side in the longitudinal direction is the same as the other end side of the first core piece 1. The other end side in the longitudinal direction is the first end face 6 similar to the one end side of the first core piece 1. The first end face 6 of each second core piece 2 is also in contact with the second end face 8 of the adjacent second core piece 2. The second core piece 2 is also provided with a crimping portion 9 for connecting the stacked core members.
The second core piece 1 is also provided with a recess 3 and a protrusion 4 as connecting means on the back surface of the first end face side edge.
Further, in the second core piece 2, the first notch 5 is also formed at the outer peripheral side end of the protruding portion 6 a of the first end surface 6, and the outer peripheral side end of the recessed portion 8 a of the second end surface 8 is also formed. A second notch 7 is formed.

The first core member 11 and the second core member 12 are alternately arranged in the stacking direction between the first core pieces of the first core member and the second cores of the second core member. The position between the pieces is shifted in the longitudinal direction, and the first core piece 1 and the second core piece 2 that are adjacent to each other in the stacking direction are rotatably connected by fitting the concave and convex portions 3 and 4 together. Has been. Further, the end portions of the first core piece 1 and the second core piece 2 facing each other through the concave and convex portions 3 and 4 form a connecting portion in a state of being alternately overlapped.
The stator core 100 is an annular body formed by rotating the concave and convex portions 3 and 4 of the core pieces of the first core member 11 and the second core member 12 that are stacked.

Next, a method for manufacturing the stator core will be described.
FIG. 4 is a plan view showing a step of forming the core member related to the stator core of the rotating electrical machine according to the first embodiment of the present invention by press punching.
First, at the position indicated by the arrow A in FIG. 4, the concave portions, the convex portions 3 and 4, and the core caulking portion 9 provided as connecting means are formed.
Next, at the position indicated by the arrow B, a through hole that can be fitted to the convex part 4 formed at the stage of the arrow A and the core caulking part 9 is formed.

Next, at the position indicated by the arrow C, the hatched portion in the drawing is punched out with a press, and the first end surface 6 and the second end surface 8 of the first core member 11 and the first and second cuts are cut. Notches 5 and 7 are formed. Similarly, at the position indicated by the arrow D, the hatched portion in the drawing is punched out with a press, and the first end surface 6 and the second end surface 8 of the second core member 12 and the first and second cutouts are formed. 5 and 7 are formed.
Next, at a position indicated by an arrow E, a portion processed at a position indicated by an arrow C is punched out by a press into a shape indicated by hatching in the drawing to form a first core member 11. Similarly, at a position indicated by an arrow E, a portion processed at a position indicated by an arrow D is punched out into a shape indicated by hatching in the drawing to form a second core member 12.
Further, at the position indicated by the arrow E, the portion processed at the position indicated by the arrow B is punched out into a shape indicated by hatching in the drawing with a press to form a core member which is the uppermost layer of the stator core.

The core member that is the uppermost layer of the stator core, the first core member 11, and the second core member 12 that are formed as described above are formed by the concave portions of the core pieces, the convex portions 3 and 4, and the convex portions. 4 and a through hole are fitted and laminated.
Next, the concave and convex portions 3 and 4 provided on the core pieces of the stacked core members are rotated about the rotation axis, and the first of the core pieces adjacent to the first contact portion 6b of each core piece is rotated. The stator core 100 is formed by bringing the two contact portions 8b into contact with each other to form an annular shape.

In the stator core 100 of the present embodiment, an arcuate matching hole 6c is provided at the contact point between the protruding portion 6a of the first end face 6 and the first contact portion 6b in each core piece forming the stator core 100. An arcuate matching hole 8c is provided at the contact point between the recess 8a on the second end face and the second contact part 8b. Therefore, the matching holes 6c and 8c are escaped and are punched out by a press between the first contact portion 6b of the core piece and the second contact portion 8b of the adjacent core piece in the core piece forming step. The area of the gap can be increased, and there is no occurrence of scraping when punching. That is, since there is no occurrence of scraping at the time of punching, it is possible to prevent damage to the work caused by punching and apparatus troubles due to mixing of scraps into the press device.
In addition, since the matching holes 6c and 8c are provided to increase the area of the gap punched out by the press, it is possible to use a press mold having a large area and improved strength, and extending the life of the mold. Is possible.

In addition, stator core 100 of the present embodiment has a high material yield because each core member is formed by linearly arranging a plurality of core pieces.
Further, in the stator core 100 of the present embodiment, the connecting means of each core piece is the concave portion 3 and the convex portion 4 provided on the back surface of the longitudinal edge portion of the core piece, and the core piece is rotated several times. However, since the mechanical strength does not decrease, the product yield is high.
Further, the stator core 100 of the present embodiment can form each core member in a state in which the core pieces are linearly arranged, so that the plate-like magnetic material that becomes scrap when forming the core member can be reduced, and the stator core is manufactured. High material yield.

That is, the stator core 100 according to the present embodiment is excellent in productivity in that the yield of products and materials is high at the time of manufacturing, apparatus trouble is prevented, and the life of the mold used is not reduced.
In the present embodiment, the arc-shaped matching hole is formed by using the contact between the projecting portion 6a of the first end surface 6 and the first contact portion 6b, and the second contact with the recess portion 8a of the second end surface. Although provided at both of the contacts with the portion 8b, the same effect can be obtained even when provided only at one of the contacts.

Embodiment 2. FIG.
A stator core (referred to as a stator core) 200 of the rotating electrical machine of the present embodiment is a first core formed on the outer peripheral side end of the protruding portion 6a of the first end face 6 in the first and second core pieces 1 and 2. The stator core 100 is the same as the stator core 100 of the first embodiment except that the shape of the notch is different from the shape of the second notch formed on the outer peripheral side end of the recessed portion 8a of the second end surface 8.
FIG. 5 is a partial front schematic view (a) showing a contact state between adjacent first core pieces in a linear first core member, related to the stator core of the rotating electrical machine according to the second embodiment of the present invention; It is a partial front schematic diagram (b) which shows the contact state of adjacent 2nd core pieces in a linear 2nd core member.

As shown in FIG. 5A, the shape of the first notch 15 at the outer peripheral side end of the protruding portion 6a of the first end face 6 in the first core piece 1 is a linear first core member. It is the shape which consists of the linear part 15a parallel to the longitudinal direction of this, and the circular arc-shaped part 15b continued from this linear part 15a. One end of the arcuate portion 15 b of the first notch 15 is connected to the outer periphery of the first core piece 1.
Further, in the first core piece 1, the shape of the second notch 17 on the outer peripheral side end of the recessed portion 8 a of the second end surface 8 is the straight portion 15 a of the first notch 15 of the first end surface 6. It is an arc shape continuous from. One end of the arc-shaped second notch 17 is connected to the outer periphery of the first core piece 1.
As shown in FIG. 5B, the shape of the notch formed in the outer peripheral side end of the protruding portion 6 a of the first end face 6 in the second core piece 2 is the first core piece 1. The shape of the notch formed at the outer peripheral side end of the recessed portion 8 a of the second end surface 8 is the same as that of the second notch 17 of the first core piece 1.

FIG. 6 is a partial perspective schematic view of a stator core of a rotating electrical machine according to Embodiment 2 of the present invention.
Also in the stator core 200 of the present embodiment, the first core members 11 and the second core members 12 are alternately stacked, and the concave portions of the first core pieces 1 and the second core pieces 2 that are connecting means are provided. The core piece is formed by turning the convex portions 3 and 4 as axes.
As shown in FIG. 6, the stator core 200 of the present embodiment includes a first core piece 1 and a second core piece 2 that are formed on the outer peripheral side end of the protruding portion 6 a of the first end face 6. Since the notch 15 and the second notch 17 formed on the outer peripheral side end of the recessed portion 8a of the second end surface 8 have the shape as described above, staggered grooves 19 are formed on the outer periphery of the stator core. It is formed in the stacking direction.

The stator core 200 of the present embodiment includes a first end face 6 and a second end face of the first core piece 1 that forms the first core member 11 and the second core piece 2 that forms the second core member 12. Since the structure with the end face 8 is the same as that of the first embodiment, it has the same effect as the stator core 100 of the first embodiment.
Furthermore, in the stator core 200 of the present embodiment, the staggered grooves 19 are formed in the stator core stacking direction on the outer periphery of the stator core 200. For example, a resin such as an adhesive is used to fix the stator core 200 in an annular shape. If the method of apply | coating to a connection part outer periphery is used, resin will flow in in the staggered groove | channel 19, and the fixing force between the core members of the stator core 200 can be improved.

Embodiment 3 FIG.
The stator core (referred to as a stator core) 300 of the rotating electrical machine of the present embodiment is also a first core formed on the outer peripheral side end of the protruding portion 6a of the first end face 6 in the first and second core pieces 1 and 2. The stator core 100 is the same as the stator core 100 of the first embodiment except that the shape of the notch is different from the shape of the second notch formed on the outer peripheral side end of the recessed portion 8a of the second end surface 8.
FIG. 7 is a partial front schematic view (a) showing a contact state between adjacent first core pieces in a linear first core member, related to the stator core of the rotating electrical machine according to the third embodiment of the present invention; It is a partial front schematic diagram (b) which shows the contact state of adjacent 2nd core pieces in a linear 2nd core member.

As shown to Fig.7 (a), the shape of the 1st notch 25 of the outer peripheral side end of the protrusion part 6a of the 1st end surface 6 in the 1st core piece 1 is V shape. One end of the V-shaped first notch 25 is connected to the outer periphery of the first core piece 1.
Further, in the first core piece 1, the shape of the second notch 27 at the outer peripheral side end of the recessed portion 8 a of the second end surface 8 is the V-shape of the first notch 25 of the first end surface 6. It is a straight line continuous from the part. One end of the linear second notch 27 is connected to the outer periphery of the first core piece 1.
As shown in FIG. 7 (b), the shape of the notch formed in the outer peripheral side end of the protruding portion 6 a of the first end surface 6 in the second core piece 2 is the first core piece 1. The shape of the notch formed at the outer peripheral side end of the recessed portion 8 a of the second end surface 8 is the same as that of the second notch 27 of the first core piece 1.

FIG. 8 is a partial perspective schematic view of a stator core of a rotating electrical machine according to Embodiment 3 of the present invention.
FIG. 9 is a schematic front view showing a state in which a frame is mounted on the stator core of the rotating electrical machine according to the third embodiment of the present invention.
FIG. 10 is a diagram illustrating a mechanism in which the frame is fixed to the stator core of the rotating electrical machine according to the third embodiment of the present invention by a fixing member.
Also in the stator core 300 of the present embodiment, the first core member 11 and the second core member 12 are alternately stacked, and the first core piece 1 and the second core piece 2 that are connecting means are recessed. The core piece is formed by turning the convex portions 3 and 4 as axes.
The stator core 300 of the present embodiment includes a first notch 25 formed at the outer peripheral side end of the protruding portion 6a of the first end face 6 in the first core piece 1 and the second core piece 2. Since the second notch 27 formed at the outer peripheral side end of the recessed portion 8a of the second end face 8 has the shape as described above, the outer periphery of the stator core is V-shaped as shown in FIG. Grooves 29 are formed in the stacking direction.

The stator core 300 of the present embodiment also includes the first end face 6 and the first end face 6 of the first core piece 1 that forms the first core member 11 and the second core piece 2 that forms the second core member 12. Since the structure of the second end face 8 is the same as that of the first embodiment, it has the same effect as the stator core 100 of the first embodiment.
In the stator core 300 of the present embodiment, the mounted frame 23 is fixed by a fixing member 24 as shown in FIG. As shown in FIG. 10, the fixing member 24 is inserted between the V-shaped groove 29 and the frame 23 on the outer periphery of the stator core.
That is, in order to form the stator core, the frame 23 is fixed to the stator core 300 by the fixing member 24 inserted into the V-shaped groove 29 on the outer periphery of the stator core formed when the core piece is rotated. The fixing force with the frame 23 can be improved.

  The stator core of the rotating electrical machine according to the present invention does not generate any scum when forming the core member, and can prevent damage to the workpiece due to slicing and equipment troubles due to the smashing being mixed into the press device, thereby improving productivity. It can be used for the required rotating electrical machines.

1 first core piece, 1a magnetic pole teeth, 2 second core piece, 2a magnetic pole teeth,
3 concave part, 4 convex part, 5 1st notch, 6 1st end surface, 6a protrusion part,
6b 1st contact part, 6c matching hole, 7 2nd notch, 8 2nd end surface,
8a hollow part, 8b second contact part, 8c matching hole, 9 punching part,
11 1st core member, 12 2nd core member, 15 1st notch, 15a Straight part,
15b arcuate part, 17 second notch, 19 staggered groove, 23 frame,
24 fixing member, 25 first notch, 27 second notch, 29 V-shaped groove,
100, 200, 300 Stator core.

Claims (4)

A first core member that linearly arranges a plurality of plate-like first core pieces from which magnetic teeth protrude and a plurality of plate-like second core pieces that protrude from magnetic teeth are arranged linearly The second core members are alternately arranged in the stacking direction, and the positions between the first core pieces of the first core member and the positions between the second core pieces of the second core member are in the longitudinal direction. Are shifted so that the edges adjacent to each other in the stacking direction of the core pieces overlap each other, and connecting means for connecting the edges adjacent to each other in the stacking direction is provided. By rotating the core piece, a stator core of a rotating electrical machine formed in an annular shape,
The first core piece has a first end face and a first notch on one end side in the longitudinal direction, and a second end face and a second notch on the other end side in the longitudinal direction. ,
The second core piece is provided with the second end face and the second notch on one end side in the longitudinal direction, and the first end face and the first notch on the other end side in the longitudinal direction. And
The first end surface includes a projecting portion provided in an arc shape around the connecting means formed at an edge of each core piece, and an inner peripheral side of each core piece continuously from the projecting portion. A first contact portion provided; and an arcuate matching hole provided at a contact point between the protrusion and the first contact portion;
The second end surface includes a recessed portion that can be fitted to a protruding portion of each adjacent core piece, and a second contact portion that is provided continuously on the inner peripheral side of each core piece from the recessed portion. And an arc-shaped matching hole provided at a contact point between the hollow portion and the second contact portion,
The first notch is formed at the outer peripheral side end of the protruding portion, and the second notch is formed at the outer peripheral side end of the recessed portion,
The first and second core members arranged in a straight line have a gap between the first contact portion of each core piece and the second contact portion of each adjacent core piece. Wedge-shaped,
When each core piece is rotated and formed into an annular shape by the connecting means, the first contact portion of each core piece and the second contact portion of each adjacent core piece contact each other. The stator core of a rotating electrical machine.   2. The arcuate matching hole is provided at one of a contact point between the projecting portion and the first contact portion or a contact point between the hollow portion and the second contact portion. The stator core of the rotating electrical machine according to 1.   A circle in which the shape of the first notch is a shape including a straight portion and an arc-shaped portion continuous from the straight portion, and the shape of the second notch is continuous from the straight portion of the first notch. The stator core for a rotating electrical machine according to claim 1 or 2, wherein the stator core is arcuate.   The shape of the first notch is V-shaped, and the shape of the second notch is a straight line continuous from the V-shaped part of the first notch. Or the stator core of the rotary electric machine of Claim 2.

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