JP5773926B2 - Laminated stator core, laminated stator, laminated stator manufacturing method - Google Patents

Description

  The present invention relates to a laminated stator core of a stator used in a motor or a generator, a laminated stator, and a manufacturing method of the laminated stator, and in particular, a divided structure of the laminated stator core and a fixing using the laminated stator core. The present invention relates to a child and a manufacturing method thereof.

Conventionally, as a laminated stator core used for a commutator motor generally used in a vacuum cleaner or an electric tool, a stator core having a teeth portion facing the rotor core and a yoke portion connecting between the teeth portions has been used. .
Such a stator core is manufactured as a structure in which thin electromagnetic steel plates are punched out by a high-speed press and laminated in a mold.
In order to wind a coil around the laminated stator core manufactured in this way, a winding needle that pulls the wire from the tip is placed in the hollow part of the stator core, and this is swiveled around the teeth part by driving the cam And winding the slot in the laminated stator core.

In the method of winding the coil by inserting the needle into the slot of the laminated stator core, a space for inserting the needle and rotating the needle is required, so the wire cannot be accurately aligned in the slot, It was difficult to obtain a high coil density by arranging the wires in a disordered manner.
Moreover, there existed a problem that the output of a motor fell and desired motor efficiency was not obtained.

  Therefore, for example, as shown in Patent Document 1, a rotatable tooth structure is adopted in a manner in which the two laminated teeth protruding portions of the laminated teeth of the laminated stator core are brought close together, and the laminated teeth protruding portions are brought close to each other in advance. There has been proposed a laminated stator core in which after the molded coil is attached, the laminated teeth projecting portion is rotated in an open state to place the coil at a desired position.

Japanese Patent Laid-Open No. 2005-176431

However, in the configuration of the laminated stator core described in Patent Document 1, six core pieces are necessary as the core member constituting one laminate, the assemblability is poor, and six rotating parts are required. Therefore, there was a problem in the rigidity of the laminated stator core in the rotating part.
Further, since the laminated stator core is divided into six blocks, the assembly accuracy of the laminated stator core is not good, and there is a problem that a magnetic loss occurs due to the large number of divided parts.

  The present invention has been made to solve such a problem, and is capable of attaching a retrofit coil arranged in high density in advance, and has a high rigidity, high accuracy, and a laminated stator core excellent in magnetic properties. An object of the present invention is to provide a laminated stator using the laminated stator core and a method of manufacturing the laminated stator.

The laminated stator core according to this invention is
A pair of opposing laminated tooth portions;
In the laminated stator core comprising two laminated yoke parts that connect the opposite base ends of each laminated tooth part,
The core member of one layer constituting the laminated stator core has a teeth portion and a yoke portion,
The teeth portion has one teeth tip protruding portion that extends and protrudes along the outer periphery of the rotor inserted inside the laminated stator core ,
The other portion corresponding to the teeth tip protrusion is cut and removed perpendicular to the protrusion direction of the teeth,
The iron core member of the layer adjacent to the one layer is laminated with the teeth portion overlapped on the iron core member of the first layer in a configuration in which the iron core member of the first layer is opposite.
The laminated tooth portion can be expanded and contracted perpendicularly to the protruding direction of the teeth portion between the laminated tooth tip protruding portions and between the two laminated yoke portions.
The laminated stator core according to the present invention is
A pair of opposing laminated tooth portions;
In the laminated stator core comprising two laminated yoke parts that connect the opposite base ends of each laminated tooth part,
The core member of one layer constituting the laminated stator core has a teeth portion and a yoke portion,
The teeth portion has only one teeth tip protruding portion that extends and protrudes along the outer periphery of the rotor inserted inside the laminated stator core,
The iron core member of the layer adjacent to the one layer is laminated with the teeth portion overlapped on the iron core member of the first layer in a configuration in which the iron core member of the first layer is opposite.
The core member of the first layer constituting the laminated stator core is:
Formed from the teeth base portion on the side where no tooth tip protrusion portion of the teeth portion is present to the teeth base end portion facing the other teeth portion, having only one tooth tip protrusion at the tip. The core piece integrally formed with the yoke portion is divided into two first core pieces at the teeth base end portions on the side where the teeth tip protrusions are located at two locations, and the laminated stator Rotated around the central axis of the iron core with a phase difference of 180 degrees,
The core member of the layer adjacent to the one layer is laminated to the core member of the first layer in a configuration in which the front and back are reversed in a state where the two first core pieces constituting the one layer are combined,
The laminated tooth portion can be expanded and contracted between the laminated tooth tip protruding portions and between the two laminated yoke portions.

The manufacturing method of the laminated stator according to the present invention is such that the space between the two laminated yoke portions facing each other of the laminated stator core according to the present invention is increased so that the intervals between the laminated tooth tip protrusions simultaneously serving as a pair of laminated tooth portions are as follows. in a compressed state, and fitted with a coil wound in advance around the outer peripheral surface of each of the laminated teeth, then, by increasing spacing laminated tooth end projecting portion by shortening between two stacked yoke portions facing the coil This is closely attached in a slot formed by the protruding portion of the stacked teeth and the stacked yoke portion.

The core member of one layer constituting the laminated stator core according to the present invention has a teeth portion and a yoke portion,
The teeth portion has one teeth tip protruding portion that extends and protrudes along the outer periphery of the rotor inserted inside the laminated stator core ,
The other portion corresponding to the teeth tip protrusion is cut and removed perpendicular to the protrusion direction of the teeth,
The iron core member of the layer adjacent to the one layer is laminated with the teeth portion overlapped on the iron core member of the first layer in a configuration in which the iron core member of the first layer is opposite.
High-rigidity coil can be installed and high rigidity because the extension between the extension teeth of the extension teeth and the extension of the two extension yokes can extend and contract perpendicularly to the extension direction of the teeth. In addition, it is possible to provide a laminated stator core with high accuracy and excellent magnetic properties.
The core member of one layer constituting the laminated stator core according to the present invention has a teeth portion and a yoke portion,
The teeth portion has only one teeth tip protruding portion that extends and protrudes along the outer periphery of the rotor inserted inside the laminated stator core,
The iron core member of the layer adjacent to the one layer is laminated with the teeth portion overlapped on the iron core member of the first layer in a configuration in which the iron core member of the first layer is opposite.
The core member of the first layer constituting the laminated stator core is:
Formed from the teeth base portion on the side where no tooth tip protrusion portion of the teeth portion is present to the teeth base end portion facing the other teeth portion, having only one tooth tip protrusion at the tip. The core piece integrally formed with the yoke portion is divided into two first core pieces at the teeth base end portions on the side where the teeth tip protrusions are located at two locations, and the laminated stator Rotated around the central axis of the iron core with a phase difference of 180 degrees,
The core member of the layer adjacent to the one layer is laminated to the core member of the first layer in a configuration in which the front and back are reversed in a state where the two first core pieces constituting the one layer are combined,
The laminated teeth part can be expanded and contracted between the laminated teeth tip protruding part and between the two laminated yoke parts, so a high-density coil can be attached, high rigidity and high accuracy, and excellent magnetic properties A laminated stator core can be provided.

The manufacturing method of the laminated stator according to the present invention is such that the space between the two laminated yoke portions facing each other of the laminated stator core according to the present invention is increased so that the intervals between the laminated tooth tip protrusions simultaneously serving as a pair of laminated tooth portions are as follows. in a compressed state, and fitted with a coil wound in advance around the outer peripheral surface of each of the laminated teeth, then, by increasing spacing laminated tooth end projecting portion by shortening between two stacked yoke portions facing the coil Providing a method of manufacturing a laminated stator core that is capable of mounting a high-density coil, is highly rigid, highly accurate, and has excellent magnetic properties because it is closely attached within the slot formed by the protruding portion of the laminated teeth and the laminated yoke. can do.

It is a perspective view of the lamination | stacking stator core which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of each core piece which comprises the lamination | stacking stator core which concerns on Embodiment 1 of this invention. It is a figure which shows the lamination process of the lamination | stacking stator core which concerns on Embodiment 1 of this invention. It is the figure which attached | subjected the identification number to each iron core piece of FIG. It is a perspective view which shows the state which extended the lamination | stacking stator core which concerns on Embodiment 1 of this invention so that the space | interval of the opposing lamination | stacking yoke part may be expanded. FIG. 6 is a plan view of FIG. 5. It is the plane schematic diagram of the coil manufactured previously which concerns on Embodiment 1 of this invention, and its sectional drawing. It is a figure which shows the procedure which attaches a coil to the lamination | stacking stator core which concerns on Embodiment 1 of this invention. It is a perspective view of the lamination | stacking stator core which concerns on Embodiment 2 of this invention. It is a figure which shows the structure of each core piece which comprises the lamination | stacking stator core which concerns on Embodiment 2 of this invention. It is a perspective view which shows the state which extended the laminated stator core which concerns on Embodiment 2 of this invention so that the space | interval of the opposing laminated yoke part may be expanded. It is a top view of the division | segmentation laminated iron core which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the state which press-fit the lamination | stacking stator (a coil is not shown) which concerns on Embodiment 3 of this invention in the flame | frame.

Embodiment 1 FIG.
Hereinafter, the manufacturing method of the lamination | stacking stator core and lamination | stacking stator which concern on Embodiment 1 of this invention is demonstrated using figures.
FIG. 1 is a perspective view of a laminated stator core 100.
The laminated stator core 100 is formed by laminating iron core members composed of four thin sheet-shaped iron core pieces, and a pair of opposed laminated tooth portions 1 and opposed base end portions A of the laminated tooth portions 1. It is comprised with the lamination | stacking yoke part 2 which connects mutually.
The laminated teeth portion 1 protrudes inside the laminated stator core 100 as a whole, and ends of the laminated teeth forming a pair extending and projecting along the outer periphery of a columnar rotor inserted inside the laminated stator core 100. A protrusion 11 is provided.

2A to 2D are views showing the shape of each iron core piece (iron core piece group) constituting the laminated stator core 100. FIG.
FIG. 2A shows a state in which a total of four core pieces, two types each constituting one stack of the stacked stator core 100, are combined.
FIG.2 (c) is the figure which isolate | separated each iron core piece shown to Fig.2 (a) apart in order to assist an understanding.
One lamination of the laminated stator core 100 is composed of two first core pieces 3a and two second core pieces 3b, for a total of four pieces.
The two first iron core pieces 3 a are disposed around the central axis of the laminated stator core 100 with a phase difference of 180 degrees.
Similarly, the two second core pieces 3b are arranged with a phase difference of 180 degrees around the central axis of the laminated stator core 100.

FIG. 2B is a diagram showing the shape of each iron core piece (iron core piece group) constituting a stack adjacent to one stack shown in FIG.
FIG.2 (d) is the figure which isolate | separated each iron core piece shown in FIG.2 (b) apart in order to assist an understanding.
When actually manufacturing a product, each core piece (iron core group) is manufactured simultaneously by punching from one magnetic steel sheet at the same time as shown in FIGS. 2 (a) and 2 (b).
However, if the core pieces shown in FIG. 2 (a) are reversed in the combined state, the outer shape becomes the same as the core pieces shown in FIG. 2 (b) (the center of the opposing teeth portion 32a). Since the shape is axisymmetric with respect to the line, it is substantially only necessary to manufacture the core piece group shown in FIG.

FIG. 3 is a diagram illustrating a lamination process of the laminated stator core 100.
The core piece group shown in FIG. 2 (b) is laminated on the core piece group shown in FIG. 2 (a), and these are alternately laminated to form a laminated stator core 100.
In the present embodiment, the lamination is fixed by caulking uneven portions provided by half-cutting each core piece.
In the case of adopting the fixing method between the laminated layers by caulking, there is a difference that the positions of the concavo-convex portions for the caulking are opposite to each other in one laminated iron core piece group and the adjacent laminated iron core piece group. In order to simplify the explanation, in the following explanation, the difference between the caulking unevenness will be ignored and the explanation will be made as two types of the first iron core piece 3a and the second iron core piece 3b.

As shown in FIG.2 (c), the two 1st iron core pieces 3a are comprised integrally with the teeth part 32a and the yoke part 31a.
The teeth portion 32a has a teeth tip protruding portion 34a at one end opposite to the side connected to the yoke portion 31a, and a portion that should originally become the other teeth tip protruding portion is perpendicular to the protruding direction of the teeth portion 32a. In this direction, the second iron core piece 3b is cut off.
The yoke portion 31a is continuous from the teeth base end portion 33a on the side where the tooth tip protruding portion 34a of the teeth portion 32a is not provided, and the teeth base of the tooth portion 32a of the other first iron core piece 3a facing the teeth portion 32a. It has a U-shape that reaches the end 33a.
The two first iron core pieces 3a are rotated with a 180 ° phase difference around the central axis of the laminated stator core 100 (point symmetry with respect to the center of the laminated stator core 100), and protrude from the tips of the teeth. It is divided at the tooth base end portion 33a on the side provided with the portion 34a.

As described above, the second iron core piece 3b has a shape that makes a pair with the tooth tip protrusion 34a of the first iron core piece 3a.
And each division surface 35a, 35b of the 1st iron core piece 3a and the 2nd iron core piece 3b is carrying out the plane perpendicular | vertical to the protrusion direction of the teeth part 32a, and the division surface 35a by the side of the 1st iron core piece 3a is more. The second core piece is longer than the split surface 35b.
Although details will be described later, depending on the shape of these divided surfaces 35a and 35b, the first iron core piece 3a and the second iron core piece 3b are slid with each other along the divided surfaces 35a and 35b, and the tips of the teeth of one tooth portion 32a. The distance between the protruding portion 34a and the second core piece 3b paired with the protruding portion 34a is expanded and contracted, and at the same time, between the yoke portion 31a and the tooth tip protruding portion 34a and between the second core piece 3b and the yoke portion 31a. The space of the slot portion to be formed can be enlarged or reduced.

In the stacking process of the stacked stator core 100, two core groups are alternately stacked in the mold as shown in FIG. 3, and are positioned vertically by the caulking portions 4 provided in the respective core pieces 3a and 3b. The divided core pieces 3a and 3b are bonded and fixed.
For example, when the core piece group of FIG. 2B is laminated on the core piece group of FIG. 2A, the upper surfaces of the two second core pieces 3b of FIG. The caulking portion 4 is coupled to the lower surfaces of the teeth tip protruding portions 34a of the two first core pieces 3a of FIG.
Similarly, the upper surfaces of the teeth tip protrusions 34a of the two first core pieces 3a in FIG. 2A are stacked on the lower surfaces of the two second core pieces 3b in FIG. , And caulking portion 4.
Further, the upper surface of the yoke portion 31 a in FIG. 2A and the lower surface of the yoke portion 31 a in FIG.
The caulking portion 4 may not be round, but may be combined with a half-projected projection having a V-shaped cross section.

FIG. 4 shows the same figure as FIGS. 2 (a) and 2 (b) with reference numerals identifying individual core pieces.
4A and 4B, the laminated stator core 100 that is caulked by the caulking portion 4 includes a divided laminated core in which the core pieces a1, a3, b1, and b4 are joined, and the core pieces a2, a4, and b2. , B3 are composed of two divided laminated iron cores joined together.
These two divided laminated cores have a configuration in which the magnetic steel plates of the laminated tooth portions 1 are alternately meshed so as to be extendable and contractible in a direction parallel to the divided surfaces 35a and 35b of the first iron core piece 3a and the second iron core piece 3b.

FIG. 5 is a perspective view showing a state in which the laminated stator core 100 is extended so that the interval between the opposed laminated yoke portions 2 is increased.
6 is a plan view of FIG.
As shown in FIGS. 5 and 6, the laminated stator core 100 is formed between the opposing laminated yoke portions 2 between the two U-shaped divided laminated iron cores while maintaining the overlapping of the crossed magnetic steel plates in the laminated tooth portion 1. Can be slid to extend and contract.
At the same time, the laminated tooth tip protrusions 11 of the laminated tooth portion 1 approach each other and move in a direction in which the laminated yoke portions 2 are separated from each other. Therefore, as shown in FIG. The part can be greatly expanded from the normal state.

Next, the coil mounting process will be described.
In the slot 8 of the laminated stator core 100, a coil wound in advance at a high density by the following method can be arranged.
FIG. 7A is a schematic plan view of the coil 5 manufactured in advance for mounting in the slot 8.
FIG. 7B is a cross-sectional view of FIG.
The coil 5 disposed in the slot 8 of the laminated stator core 100 is manufactured separately in advance.
Since the coil 5 has a simple donut shape, the coil 5 is obtained by aligning and winding the wire rods on the resin bobbin 9 by an automatic machine programmed with a winding operation.
Thereby, the coil 5 wound with high density can be formed.

FIG. 8 is a diagram showing a procedure for attaching the coil 5 to the laminated stator core 100.
First, as shown in FIG. 8 (a), the gap between the laminated yoke portions 2 of the laminated stator core 100 is extended, and at the same time, the gap between the laminated teeth tip protrusions 11 is reduced so that the opening portion of the slot 8 spread.
Next, as shown in FIGS. 8 (b) and 8 (c), the coil 5 is mounted up to the teeth base end 33 a so as to surround the outer periphery of the laminated tooth portion 1 from the expanded opening portion of the slot 8 into the slot 8. To do.
Finally, as shown in FIG. 8D, the space between the laminated yoke portions 2 of the laminated stator core 100 is reduced to the original state.
The outer diameter of the coil 5 when mounted on the laminated tooth portion 1 is substantially equal to the length between the two spread laminated yoke portions 2.
While the bobbin 9 around which the coil 5 is wound is pushed from the inside to the outside of the laminated stator core 100 by a jig (not shown), the space between the laminated yoke portions 2 is reduced.
Thus, with the bobbin 9 of the coil 5 being in close contact with the slot 8, as shown in FIG. 8D, the coil end portion 51 is bent and attached to the outer peripheral side.
FIG. 8E is a side view of FIG.
As shown in the figure, by causing the coil 5 to be bent and deformed, collision between the rotor and the coil 5 can be prevented.
Through the above steps, a laminated stator in which the coil 5 is mounted on the laminated stator core 100 can be obtained.

According to the laminated stator core 100, the laminated stator, and the laminated stator manufacturing method according to the first embodiment of the present invention, the number of types of core pieces constituting one laminated iron core member is small, and two divisions are made. The laminated iron cores are always connected in a state where some magnetic steel plates are completely overlapped in the radial direction of the laminated stator core 100 in the teeth portion 32a, and there is no rotating part in the connecting portion of the divided laminated iron core. It is possible to provide a laminated stator core that is rigid, highly accurate, excellent in magnetic properties and easy to assemble, a laminated stator, and a method for manufacturing the same.
Further, the coil 5 wound in advance at a high density can be easily disposed around the laminated tooth portion 1 by extending the opening of the slot 8 and simultaneously shrinking the gap between the laminated tooth tip protrusions 11. .
Moreover, since the bobbin 9 around which the coil 5 is wound can be curved and deformed to the outer peripheral side by contracting the space between the opposing laminated yoke portions 2 after the coil 5 is mounted, there is a risk that the coil 5 may come into contact with the rotor. There is no. Thereby, the coil 5 wound with high density can be mounted.

Furthermore, since the laminated stator core 100 can be handled as a single iron core in the same manner as the integrated iron core after being taken out from the mold for making it, it has excellent transportability.
In this way, a laminated stator core, laminated stator, laminated stator that can be fitted with a high-density coil 5, is highly rigid and highly accurate, has excellent magnetic properties, is excellent in assembly properties, is excellent in transportability, and is highly productive. An iron core manufacturing method can be provided.
In the present embodiment, an example is shown in which iron core groups having different arrangements are alternately stacked one by one. However, the same effect can be obtained by stacking iron groups having different arrangements alternately as a set. can get.

Embodiment 2. FIG.
The second embodiment of the present invention will be described below with reference to the drawings, focusing on the differences from the first embodiment.
FIG. 9 is a perspective view of the laminated stator core 200.
FIG. 10A shows a state in which two types of iron core pieces constituting one lamination of the laminated stator core 200 are combined.
FIG.10 (b) is a figure which shows the shape of each iron core piece (iron core piece group) which comprises the lamination | stacking adjacent to one lamination | stacking shown to Fig.10 (a).

Similar to the first embodiment, these iron core groups are alternately stacked, and caulked portions 4 are caulked and fixed between the upper and lower laminates to form a laminated stator having a shape in which two types of divided laminated iron cores are combined. An iron core 200 is formed.
The difference between the core pieces adopted in the present embodiment and the core pieces adopted in the first embodiment is that in this embodiment, only two first core pieces 3a are used for each lamination. The two iron core pieces 3b are omitted.
In this case, as shown in FIG. 9, the laminated tooth tip protrusions 211 of the laminated stator core 200 are formed in a form in which magnetic steel sheets exist for each sheet.

FIG. 11 is a plan view showing a state in which the laminated stator core 200 is extended so that the interval between the opposed laminated yoke portions 202 is enlarged.
Compared to the laminated stator core 100 of the first embodiment, the laminated stator core 200 can extend more greatly between the laminated yoke portions 202 facing each other, and at the same time, can bring the laminated tooth tip protrusions 211 closer together. .
In the laminated stator core 100, the sliding range of the two divided laminated cores is regulated by the second iron core piece 3b, but this is not the case.
Thereby, there exists an advantage which can mount | wear the predetermined position with the coil 5 more easily.

FIG. 12 is a plan view of one divided laminated core in the present embodiment.
The two divided laminated cores according to the present embodiment can be manufactured by completely separating the two divided laminated cores as necessary.
That is, since the laminated stator core 200 is composed only of the first iron core pieces 3a, the two laminated iron core pieces constituting each laminate may be sequentially laminated to complete the laminated stator core 200 as a whole. As shown in FIG. 12, half of the laminated stator cores 200 are laminated so that the teeth 32 a of the first iron core pieces 3 a overlap with each other, thereby producing two divided laminated iron cores. When combined, the laminated stator core 200 can be finally formed.

Embodiment 3 FIG.
The third embodiment of the present invention will be described below with reference to the drawings, focusing on the differences from the first to third embodiments.
FIG. 13 is a cross-sectional view showing a state where the laminated stator (coil is not shown) according to the present embodiment is press-fitted and fixed to a cylindrical frame 7 made of sheet metal.
In addition to press-fitting into the frame 7, the frame 7 is heated to increase the inner diameter of the frame 7, and after inserting the laminated stator, it is cooled so that the laminated stator is securely fixed to the frame 7. And may be fixed.

Between the frame 7 and the laminated stator, four symmetric corners with respect to the center of the laminated stator are in contact with each other, and therefore forces act inward from the four directions. Therefore, the force which presses a division | segmentation surface mutually acts on the division surface of a teeth base end part and a yoke part side.
Therefore, as shown in FIG. 13, a positioning convex portion 36a is provided on the division surface on the teeth base end side, and a positioning concave portion 37b is provided on the division surface on the yoke side.
Then, the divided laminated stator cores can be integrated with high accuracy simply by assembling within the frame 7 without shifting each other's division planes.
Thereby, it is not necessary to integrate two divided laminated iron cores by welding or the like in advance, and a stator having high rigidity and high accuracy can be obtained.
Note that the positioning irregularities may be reversed, or may have other shapes.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

100, 200 laminated stator core, 1 laminated teeth,
11, 211 Laminated teeth tip protruding portion, 2,202 Laminated yoke portion,
3a 1st iron core piece, 3b 2nd iron core piece, 31a yoke part,
32a Teeth part, 33a Teeth base end part, 34a Teeth tip protruding part,
35a, 35b dividing surface, 36a positioning convex part, 37b positioning concave part,
4 Caulking section, 5 coils, 51 coil end section, 7 frames, 8 slots,
9 Bobbin, A Base end.

Claims (10)

A pair of opposing laminated tooth portions;
In the laminated stator core comprising two laminated yoke parts that connect the opposite base ends of each laminated tooth part,
The core member of one layer constituting the laminated stator core has a teeth portion and a yoke portion,
The teeth portion has one teeth tip protruding portion that extends and protrudes along the outer periphery of the rotor inserted inside the laminated stator core ,
The other portion corresponding to the teeth tip protrusion is cut and removed perpendicular to the protrusion direction of the teeth,
The iron core member of the layer adjacent to the one layer is laminated with the teeth portion overlapped on the iron core member of the first layer in a configuration in which the iron core member of the first layer is opposite.
A laminated stator core, wherein the laminated teeth portion can be expanded and contracted perpendicularly to the protruding direction of the teeth portion between the laminated tooth tip protruding portions and between the two laminated yoke portions. A pair of opposing laminated tooth portions;
In the laminated stator core comprising two laminated yoke parts that connect the opposite base ends of each laminated tooth part,
The core member of one layer constituting the laminated stator core has a teeth portion and a yoke portion,
The teeth portion has only one teeth tip protruding portion that extends and protrudes along the outer periphery of the rotor inserted inside the laminated stator core ,
The iron core member of the layer adjacent to the one layer is laminated with the teeth portion overlapped on the iron core member of the first layer in a configuration in which the iron core member of the first layer is opposite.
The core member of the first layer constituting the laminated stator core is:
Formed from the teeth base portion on the side where no tooth tip protrusion portion of the teeth portion is present to the teeth base end portion facing the other teeth portion, having only one tooth tip protrusion at the tip. The core piece integrally formed with the yoke portion is divided into two first core pieces at the teeth base end portions on the side where the teeth tip protrusions are located at two locations, and the laminated stator Rotated around the central axis of the iron core with a phase difference of 180 degrees,
The core member of the layer adjacent to the one layer is laminated to the core member of the first layer in a configuration in which the front and back are reversed in a state where the two first core pieces constituting the one layer are combined,
A laminated stator core capable of expanding and contracting between the laminated teeth tip protruding portions and between the two laminated yoke portions of the laminated teeth portion. The one-layer iron core member has two second iron core pieces having the same shape as the shape of the one tooth tip protrusion,
Two pieces of the second core pieces are divided and arranged so as to form a pair with the teeth tip protrusions of the first core pieces,
The surface of the first layer that contacts the first core piece and the second core piece is perpendicular to the protruding direction of the teeth portion,
The teeth tip protrusion of the first core piece of the first layer and the second core piece of the core member of the layer adjacent to the first layer are laminated and fixed,
The said 2nd core piece of said 1 layer and the said teeth front-end | tip protrusion part of the said 1st core piece of the core member of the layer adjacent to said 1 layer are laminated | stacked and fixed. Laminated stator core. 3. The laminated stator core according to claim 2, wherein the split surfaces of the two first core pieces have positioning irregularities that fit into the other first core piece. 4. The laminated stator core according to claim 3, wherein the split surfaces of the two first core pieces have positioning irregularities that fit into the other first core piece. 5. The teeth tip protrusion of the first core piece of the first layer and the second core piece of the iron core member of the layer adjacent to the first layer are fixedly stacked.
The said 2nd core piece of said 1 layer and the said teeth front-end | tip protrusion part of the said 1st core piece of the core member of the layer adjacent to said 1 layer are adhere | attached and laminated | stacked. Item 6. The laminated stator core according to Item 5. The laminated stator core according to any one of claims 2 to 6, wherein adjacent laminations in the yoke portion are fixed. The coil wound around the laminated tooth portion of the laminated stator core according to any one of claims 1 to 7, wherein a coil end portion is curved and deformed toward an outer peripheral side of the laminated stator core. Laminated stator. The laminated stator core according to any one of claims 1 to 7,
By expanding the gap between the two laminated yoke portions facing each other, the coil teeth wound in advance in the state where the gap between the protruding ends of the laminated teeth forming a pair of the laminated tooth portions is simultaneously reduced. The coil is formed by the laminated tooth tip projecting portion and the laminated yoke portion by attaching to the outer peripheral surface and then expanding the interval between the laminated tooth tip projecting portions by shrinking between the two laminated yoke portions facing each other. A manufacturing method of a laminated stator to be closely attached in a slot. The coil has an outer diameter longer than a length between the two laminated yoke portions in a state where the two laminated yoke portions of the laminated stator core are contracted when the coil is wound.
The laminated stator according to claim 9, wherein the coil is attached to the laminated tooth portion to shrink between the two laminated yoke portions facing each other, and at the same time, the coil is bent and deformed toward the outer peripheral side of the laminated stator core. Manufacturing method.

Images