JP5738208B2 - Stator for rotating electrical machine and method for manufacturing stator for rotating electrical machine - Google Patents

Description

  The present invention relates to a stator for a rotating electrical machine and a method for manufacturing a stator for a rotating electrical machine.

  Conventionally, in a stator of a rotating electrical machine, in a model in which a resin insulator is attached to an iron core and a winding is provided thereon to form insulation between the iron core and the coil, the resin insulator is intended to improve the performance of the rotating electrical machine. By reducing the wall thickness of the coil, the slot cross-sectional area in which the coil is disposed has been expanded, and the space factor of the coil has been improved.

In recent years, competition for higher motor efficiency has intensified for the purpose of downsizing, higher output, and energy saving of electrical equipment. As one of the measures for higher efficiency, coil occupancy by further thinning resin insulators There is a need to improve the product ratio.
However, in a structure in which an injection molded part of a thermoplastic resin is arranged as an insulator, the thickness of the injection molded part is limited to the thickness dimension (about 0.3 mm is the limit thickness), and there is a limit to thinning.
Therefore, a structure in which a part of the winding portion of the resin insulator is replaced with an insulating film has been proposed. This is a technique that can reduce the thickness of the insulating layer to the thickness of the insulating film (e.g., 0.1 to 0.3 mm) and contribute to the high efficiency of the motor.
In Patent Document 1, the resin insulator assembled on the end surface in the axial direction of the iron core is insulated with insulating films disposed on both side surfaces of the core of the iron core, and the insulating films on both side surfaces are assembled to the “projection-shaped portion” of the resin insulator, Structures that are fixed to the teeth have been proposed.
With this structure, the insulating layer at the portion where the coil is wound is thinned, the winding space is increased, and the space factor of the coil is improved.

International Publication No. WO2011 / 013273 (page 4, page 5, paragraphs [0008] to [0012], FIG. 4)

By the way, the laminated iron core is a laminate of steel plates, and there is a lamination gap between the steel plates.
In the configuration of Patent Document 1, the lamination gap of the iron core is compressed by the tension at the time of pulling the electric wire in the coil winding process, and the iron core is shrunk in the lamination direction so that the surplus portion of the insulating film becomes wrinkles.
When the electric wire rides on the saddle, the coil is disturbed, the electric wire coatings rub against each other, and the electric wire coating is damaged.
In addition, there is a problem in that the insulation reliability is lowered due to a gap in the insulating portion between the coil and the iron core due to the wrinkles of the insulating film.
Further, a step due to a dimensional difference between the iron core and the resin insulator occurs in the assembly portion of the iron core and the resin insulator.
In the coil winding process, there is a problem that when the wire is wound around the iron core while being pulled, the coating of the wire is damaged by this step, and the insulation reliability is lowered.

  This invention was made to solve such a problem, prevents the occurrence of wrinkles of the insulating film due to compression of the iron core due to the tension of the wire when winding the coil around the iron core, high insulation performance, Another object of the present invention is to provide a highly efficient rotating electrical machine stator and a method of manufacturing the rotating electrical machine stator.

The stator of the rotating electrical machine according to the present invention is:
It is configured by arranging a split laminated iron core formed by laminating iron core pieces of a magnetic steel plate consisting of a back yoke part and a tooth part in an annular shape,
The split laminated iron core is a stator of a rotating electrical machine having a coil winding portion around which a coil is wound.
An insulating film is mounted on the coil winding portion to insulate the coil from the divided laminated core.
The insulating film has joint portions where the crimping allowances of the insulating film are joined to each other at both axial end surface portions of the divided laminated iron core,
The joint have a sealing portion for sealing with an insulating resin, provided with a core piece recess of the axial ends of the laminated core segment, insulating films are bonded along the recess, the sealing portion, the joint portion It seals in a recessed part .

A method of manufacturing a stator for a rotating electrical machine according to the present invention includes:
It is configured by arranging a split laminated iron core formed by laminating iron core pieces of a magnetic steel plate consisting of a back yoke part and a tooth part in an annular shape,
A method of manufacturing a stator of a rotating electrical machine having a coil winding portion around which a coil is wound,
An insulating film mounting step of mounting an insulating film for insulating the coil and the split laminated iron core on the coil winding portion;
A pressing step of pressing the split laminated core in the axial direction of the split laminated core;
While performing the pressing step, an insulating film crimping step of forming a joint by crimping the crimping margin of the insulating film to each other;
An insulator molding step for sealing the joint with an insulating resin ,
The insulator molding step injects an insulating resin from a resin injection hole provided in a molding die for sealing the joint, and seals the joint.
The opening of the groove of the divided laminated core that penetrates in the axial direction of the divided laminated core is closed by a movable mechanism for mounting the insulating film, and a rib hole that penetrates in the axial direction of the divided laminated core and communicates with the resin injection hole is formed. Having a groove opening closing step to form,
In insulator forming process is also to sealing with an insulating resin and a rib hole and junction as a unit.
A method of manufacturing a stator for a rotating electrical machine according to the present invention includes:
It is configured by arranging a split laminated iron core formed by laminating iron core pieces of a magnetic steel plate consisting of a back yoke part and a tooth part in an annular shape,
A method of manufacturing a stator of a rotating electrical machine having a coil winding portion around which a coil is wound,
An insulating film mounting step of mounting an insulating film for insulating the coil and the split laminated iron core on the coil winding portion;
A pressing step of pressing the split laminated core in the axial direction of the split laminated core;
While performing the pressing step, an insulating film crimping step of forming a joint by crimping the crimping margin of the insulating film to each other;
An insulator molding step for sealing the joint with an insulating resin,
The insulator molding step injects an insulating resin from a resin injection hole provided in a molding die for sealing the joint, and seals the joint.
The position of the resin injection hole is formed with an offset from the position of the joint portion with respect to the circumferential direction of the divided laminated core, and the insulating resin injected from the resin injection hole seals the joint portion while pushing down the joint portion. Is.

The stator of the rotating electrical machine according to the present invention is:
An insulating film is mounted on the coil winding portion to insulate the coil from the divided laminated core.
The insulating film has joint portions where the crimping allowances of the insulating film are joined to each other at both axial end surface portions of the divided laminated iron core,
The joint have a sealing portion for sealing with an insulating resin, provided with a core piece recess of the axial ends of the laminated core segment, insulating films are bonded along the recess, the sealing portion, the joint portion Since it is sealed in the recess, the compressed state of the split laminated core is maintained by the cured molding resin, and in the subsequent coil winding process, the winding phenomenon that the split laminated core is compressed by the tension pulling the electric wire is prevented, It is possible to prevent the generation of wrinkles due to excess insulation film, the coil winding disturbance generated when the electric wire rides on the hook, the coil coating being scratched by the winding disturbance and the damage to the coil coating, and the deterioration of the insulation reliability can be prevented. is there.

A method of manufacturing a stator for a rotating electrical machine according to the present invention includes:
An insulating film mounting step of mounting an insulating film for insulating the coil and the split laminated iron core on the coil winding portion;
A pressing step of pressing the split laminated core in the axial direction of the split laminated core;
While performing the pressing step, an insulating film crimping step of forming a joint by crimping the crimping margin of the insulating film to each other;
An insulator molding step for sealing the joint with an insulating resin ,
The insulator molding step injects an insulating resin from a resin injection hole provided in a molding die for sealing the joint, and seals the joint.
The opening of the groove of the divided laminated core that penetrates in the axial direction of the divided laminated core is closed by a movable mechanism for mounting the insulating film, and a rib hole that penetrates in the axial direction of the divided laminated core and communicates with the resin injection hole is formed. Having a groove opening closing step to form,
In insulator forming process, since the a is sealed with an insulating resin and a rib hole and junction integrally,
The compressed state of the split laminated iron core is maintained by the insulative insulating film, and the winding phenomenon that the split laminated iron core is compressed by the tension that pulls the electric wire in the coil winding process is prevented. It is possible to prevent the coil coating from being damaged when the coil rides on the coil, and to prevent the coil coating from being scratched due to the winding disturbance, thereby preventing the insulation reliability from being lowered.
A method of manufacturing a stator for a rotating electrical machine according to the present invention includes:
An insulating film mounting step of mounting an insulating film for insulating the coil and the split laminated iron core on the coil winding portion;
A pressing step of pressing the split laminated core in the axial direction of the split laminated core;
While performing the pressing step, an insulating film crimping step of forming a joint by crimping the crimping margin of the insulating film to each other;
An insulator molding step for sealing the joint with an insulating resin,
The insulator molding step injects an insulating resin from a resin injection hole provided in a molding die for sealing the joint, and seals the joint.
The position of the resin injection hole is formed with an offset from the position of the joint portion with respect to the circumferential direction of the divided laminated core, and the insulating resin injected from the resin injection hole seals the joint portion while pushing down the joint portion. Because it is a thing
The compressed state of the split laminated iron core is maintained by the insulative insulating film, and the winding phenomenon that the split laminated iron core is compressed by the tension that pulls the electric wire in the coil winding process is prevented. It is possible to prevent the coil coating from being damaged when the coil rides on the coil, and to prevent the coil coating from being scratched due to the winding disturbance, thereby preventing the insulation reliability from being lowered.

It is a perspective view of the stator which concerns on Embodiment 1 of this invention. It is a perspective view of the core which concerns on Embodiment 1 of this invention. It is a perspective view of the division | segmentation laminated | stacked iron core which concerns on Embodiment 1 of this invention. It is sectional drawing of the division | segmentation laminated | stacked iron core which concerns on Embodiment 1 of this invention. It is a top view of the iron core piece which concerns on Embodiment 1 of this invention. It is a side view of the core which concerns on Embodiment 1 of this invention. It is a perspective view of the division | segmentation laminated | stacked iron core which concerns on Embodiment 1 of this invention. It is an exploded block diagram of the insulating film which concerns on Embodiment 1 of this invention. It is a side view which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 1 of this invention. It is a conceptual diagram which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 1 of this invention. It is a perspective view which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 1 of this invention. It is a perspective view which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 1 of this invention. It is a perspective view which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 1 of this invention. It is sectional drawing which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 1 of this invention. It is a top view which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 1 of this invention. It is a perspective view which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 1 of this invention. It is sectional drawing which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 1 of this invention. It is sectional drawing which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 1 of this invention. It is a partial cross section side view of the core which concerns on Embodiment 1 of this invention. It is a perspective view which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 1 of this invention. It is a top view of the iron core piece which concerns on Embodiment 1 of this invention. It is a top view of the iron core piece which concerns on Embodiment 1 of this invention. It is a perspective view of teeth vicinity protrusion part vicinity of the division | segmentation laminated | stacked iron core which concerns on Embodiment 1 of this invention. It is a perspective view which shows the division | segmentation laminated | stacked iron core and manufacturing apparatus which concern on Embodiment 2 of this invention. It is a partial cross section side view of the core which concerns on Embodiment 2 of this invention. It is a perspective view of the division | segmentation laminated | stacked iron core which concerns on Embodiment 3 of this invention. It is a partial cross section side view of the core which concerns on Embodiment 3 of this invention. It is a figure which shows the example of the junction part of the insulating film which concerns on Embodiment 4 of this invention.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing six teeth for a half circumference of a stator 100 of a rotating electrical machine.
As shown in the figure, the stator 100 is configured by arranging a plurality of cores 2 in an annular shape and being connected to each other.

FIG. 2 is a perspective view of the core 2.
FIG. 3 is a perspective view of the divided laminated core 50.
FIG. 4 is a cross-sectional view of the divided laminated core 50.
FIG. 5 is a plan view of the iron core piece 51 constituting the divided laminated iron core 50.
As shown in FIG. 4, the iron core piece 51 has a crimped portion 6, and the divided iron cores 50 are configured by connecting the iron core pieces 51 by press-fitting the crimped portions 6 between the laminated layers. .
As shown in FIG. 5, the iron core piece 51 cut out from the magnetic steel plate includes an arcuate back yoke 52, a tooth 54 protruding from the center of the back yoke 52 toward the center of the stator 100, and a circumferential direction from the tip of the tooth 54. And a groove 55 a provided at the base end of the back yoke 52 attached to the tooth 54 and a groove 55 b provided at the base of the tooth tip protrusion 53.

The core 2 is obtained by pressure-bonding an insulating film 60 to a coil winding portion 9 around which a coil of the divided laminated core 50 is wound (hereinafter referred to as a film bonding portion) and molding a resin insulator 40 by injection molding.
FIG. 6A is a side view of the core 2.
FIG. 6B is a view in which the core 2 is cut along the line AA in FIG.
As shown in the figure, the resin insulator 40 includes a yoke flange 41 projecting from the upper and lower surfaces of the back yoke 52 of the split laminated core 50 in the stacking direction, and an inner peripheral surface and an outer periphery of the tooth tip protrusion 53 of the split laminated core 50. Teeth tip flange portion 42 that surrounds and seals other than the surface, sealing portion 43 that seals both end surfaces of the teeth 54 of the laminated core 50 in the stacking direction, grooves 55a provided in the stacking direction, and in the stacking direction The ribs 44b and 44a formed in the provided groove 55b are integrally formed.
The resin insulator 40 is made of a thermoplastic resin such as PBT (polybutylene terephthalate), LCP (liquid crystal polyester), or POM (polyacetal).

The inner circumferential surface of the back yoke 52 of the split laminated core 50, the outer circumferential surface of the tooth tip protrusion 53, and the side surface of the tooth 54, which are not covered with the resin insulator 40 (referred to as an insulating film mounting portion), The insulating film 60 is pressure bonded.

FIG. 7 is a diagram in which the insulating film 60 is attached to the divided laminated core 50.
The insulating film 60 is a film-like insulator of about 0.03 to 0.30 mm made of a thermoplastic resin (for example, polyethylene terephthalate, polyphenylene sulfide, etc.).
FIG. 8 is an exploded configuration diagram of the mounted insulating film 60.
Originally, an insulating film that has been cut into a predetermined shape in advance is used to obtain the shape as shown in FIG. 7 (particularly the shape of the crimping allowance 61) through each manufacturing process, but for convenience of explanation, as shown in FIG. Shown in

  As shown in FIG. 8, two insulating films 60 are mounted so as to surround the periphery of the teeth 54 of the split laminated core 50 from both side surfaces, and the respective insulating films are formed at the center of both end surfaces in the stacking direction of the teeth 54. The inner surface of the crimping allowance 61 at the end of 60 is crimped (joined) to form the joint 62.

As shown in FIGS. 6A and 6B, the joining portion 62 is sealed and fixed at the center of the sealing portion 43 of the resin insulator 40.
The shape of the insulating film 60 differs depending on the shape of the divided laminated iron core 50, and is not limited to the shape illustrated in each embodiment of the present invention.
In addition, the insulating film 60 made of a thermoplastic resin has an effect of being plastically deformed such as bending and stretching by the heat of a film bonding mechanism (described later) and closely contacting the divided laminated core 50. Therefore, the shape of the insulating film 60 is It is sufficient to install in consideration of the plastic deformation, and it is not necessary to make the dimension of the insulating film 60 before press bonding completely coincide with the dimension of the mounting portion of the insulating film 60.

  A coil (not shown) is wound around the core 2, but the divided laminated core 50 and the coil are electrically insulated by a resin insulator 40 and an insulating film 60.

The manufacturing method of the core 2 is demonstrated using figures.
First, an outline of the manufacturing process of the core 2 will be described.
First, the divided laminated core 50 is pressed in the lamination direction of the divided laminated core 50 by a pressing step.
Next, in the insulating film crimping step, the insulating film 60 is pressure-bonded to the pressed insulating film mounting portion of the split laminated core 50, and the bonding margin 61 of the two insulating films 60 is pressure-bonded together to form the joint portion 62. To do.
Next, in the insulator molding step, the split laminated iron core 50 with the insulating film 60 attached is placed in a molding die, and the yoke collar 41, the teeth tip collar 42, the sealing part 43, and the ribs 44a, b Is formed integrally, and the joining portion 62 is sealed and fixed with a molding resin.

Next, each manufacturing process will be described in order with reference to the drawings.
First, the insulating film 60 shaped in advance in a predetermined shape is mounted on the insulating film mounting portion of the split laminated iron core 50 and installed in a molding die (not shown).
This process is referred to as an insulating film mounting process in the claims.
And a press process is implemented.
FIG. 9 is a cross-sectional view showing the relationship among the divided laminated iron core 50, the film bonding mechanism 21, and the iron core pressing mechanism 22 installed in the molding die.
In order to simplify the drawing, the insulating film 60 is not shown.
FIG. 10 is a conceptual diagram of the divided laminated core 50 in the state of FIG.
In order to simplify the drawing, the insulating film 60 and the iron core pressing mechanism 22 are not shown.
As shown in the figure, first, the back yoke 52 of the divided laminated core 50 is pressed in the lamination direction by the iron core pressing mechanism 22 from both end surfaces in the lamination direction, and at the same time, the back yoke 52 of the divided laminated iron core 50 is pressed by the film bonding mechanism 21. The inner peripheral edge and the teeth tip protrusion 53 are pressed in the stacking direction of the split laminated core 50 (shown as arrows Y and Y ′ in FIGS. 9 and 10).
As a result, the entire divided laminated core 50 is compressed in the lamination direction.

The split laminated core 50 is formed by press-fitting the caulking portions 6 included in the respective core pieces 51 to each other, so that the laminated gap 10 is provided between the iron pieces 51.
Therefore, pressing in the stacking direction by the iron core pressing mechanism 22 compresses the stacking gap 10 of the split stacking iron core 50, and the split stacking iron core 50 contracts in the stacking direction.
As mentioned above, although the Example which implements a press process after an insulating film mounting process was given, even if it implements an insulating film mounting process after a press process, there is no problem.

Next, an insulating film crimping process is performed.
FIG. 11 is a perspective view showing a part of the teeth 54 of the split laminated core 50, the insulating film 60, the side surface pressing mechanism 20, the film bonding mechanism 21, and the molding dies 25a and 25b.
In order to simplify the drawing, the tooth 54 and the peripheral device between the BB line and the CC line in FIG. 3 are shown cut out, and the back yoke 52 and the tooth tip protrusion 53 are omitted. .

  While the pressing in the stacking direction of the split laminated iron core 50 by the iron core pressing mechanism 22 and the film bonding mechanism 21 is maintained, the two insulating films 60 are arranged along the both side surfaces of the teeth 54 of the split laminated iron core 50 by the side pressing mechanism 20. Press on.

12 shows the teeth 54, the insulating film 60, and the side surface pressing mechanism 20 of the split laminated core 50. FIG.
FIG. 2 is a perspective view showing a part of a film bonding mechanism 21 and molding dies 25a and 25b.
Next, the film bonding mechanism 21 maintains the pressing force in the laminating direction, as shown by arrows Z and Z ′ in FIG. 12 toward the teeth 54 of the divided laminated iron core 50 as shown in FIG. Advance.
At this time, the tip of the film bonding mechanism 21 is set to a temperature higher than that of the other mold parts and near the melting temperature of the insulating film.
Both insulating films 60 are bent from the side surface of the split laminated iron core 50 to both axial end faces so as to be along the split laminated iron core 50, and further the crimping allowance of the end portions of the respective insulating films 60 by the distal end portion of the film bonding mechanism 21. The inner surfaces of 61 are pressure-bonded (joined) to form a joint portion 62.

  Since the divided laminated iron core 50 and the insulating film 60 are in close contact with each other without any gap, the occurrence of a gap between the divided laminated iron core 50 and the insulating film 60 can be prevented, and an effect of improving the coil space factor can be obtained.

Next, an insulator molding process is performed.
FIG. 13 is a perspective view showing a portion of the teeth 54 of the split laminated iron core 50, the insulating film 60, the side surface pressing mechanism 20, the film bonding mechanism 21, and the molding dies 25a and 25b.
FIG. 14 is a view showing a state immediately before injecting the insulating resin after putting the divided laminated iron core 50 with the insulating film 60 mounted into the molding dies 25a to 25d.
At this time, the resin insulator 40 is molded with the inner walls of the concave molds 25a and 25b, both end surfaces of the divided laminated core 50, the side surfaces of the core pressing mechanism 22, and the mold 25c having the resin injection hole 26. A closed mold cavity portion 27 is formed.
FIG. 15 is a plan view showing the positional relationship among the divided laminated iron core 50, the insulating film 60, the side pressure bonding mechanism 20, and the molding dies 25c and 25d.
As shown in the drawing, the grooves 55 a and 55 b that are continuous in the stacking direction of the split laminated core 50 are ribs that are holes that are closed by the side pressing mechanism 20 and penetrate in the stacking direction of the split stacked core 50. Holes 66a and 66b are formed.
This process is referred to as a groove opening closing process in the claims.
The rib holes 66 a and 66 b communicate with the resin injection hole 26 through the mold cavity portion 27.

FIG. 16 shows the teeth 54 of the split laminated iron core 50, the insulating film 60, and the side surface pressing mechanism 20.
FIG. 2 is a perspective view showing a part of a film bonding mechanism 21 and molding dies 25a and 25b.
FIG. 17 is a cross-sectional view of the divided laminated core 50 and the molding dies 25a and 25b along the line DD in FIG. 14, and the direction in which the injection pressure of the molding resin injected from the resin injection hole 26 of the molding die 25c is applied. Is indicated by an arrow.
18 is a cross-sectional view of the divided laminated core 50, the molding dies 25a and 25b, and the side surface pressing mechanism 20 taken along the line FF in FIG. The direction in which the injection pressure of the molding resin is applied is indicated by arrows.

Molding resin is injected from the resin injection hole 26 and filled into the mold cavity 27.
As shown in the drawing, the rib holes 66a and 66b are filled with molding resin through the mold cavity 27, and the ribs 44a and 44b, which are reinforcing columns made of insulating resin, are molded.
The molded resin filled in the mold cavity 27 and the rib holes 66a and 66b and hardened forms the resin insulator 40 integrally.
As described above, the resin insulator 40 includes the yoke flange portion 41 projecting from the upper and lower surfaces of the back yoke 52 of the split laminated core 50 in the stacking direction, and the inner and outer peripheral surfaces of the teeth tip protrusion 53 of the split laminated core 50. A tooth distal end flange portion 42 that surrounds and seals, a sealing portion 43 that seals both end surfaces in the stacking direction of the teeth 54 of the split laminated core 50, and a base end portion of the back yoke 52 attached to the teeth 54. The groove 55a provided in the stacking direction and the ribs 44a and 44b formed in the groove 55b provided in the stacking direction at the base of the tooth tip protrusion 53 are integrally formed of a molding resin.

By injecting molding resin from the resin injection hole 26 provided in the molding die 25 c and filling the mold cavity 27, an injection pressure of about 20 to 40 MPa is uniform on both end surfaces in the axial direction of the divided laminated core 50. To be added.
By compressing the lamination gap 10 of the divided laminated core 50 by this injection pressure, it has the effect of compressing the entire divided laminated core 50 in the lamination direction.
When the molding resin is solidified while the injection pressure is applied, the divided laminated core 50 is fixed in a compressed state.
In addition, the resin insulator 40 exhibits a holding force that can withstand the force with which the split laminated iron core 50 attempts to restore the original state, and can suppress fluctuations in the compression state of the core 2 before and after the coil winding process. .

Hereinafter, installation examples of the resin injection holes 26a, 26b, and 26c provided in the molding die 25c will be described.
FIGS. 19A and 19B are partial cross-sectional side views of the core 2.
The number of resin injection holes 26a, 26b, 26c of the molding die 25c (molding die 25c is not shown) and the positional relationship of the resin injection holes 26a, 26b, 26c with respect to the core 2 are shown.
The molding die 25c (see FIG. 14) includes two resin injection holes 26a and 26b for injecting molding resin.
As shown in FIG. 19A, the resin injection holes 26a and 26b are installed at equal distances across the center of the joint portion 62 of the insulating film 60 to be sealed by the resin insulator 40. The joint 62 is sealed in the center of the resin insulator 40 by molding resin that is uniformly injected from the joints 26a and 26b to the joint 62, and the joint 62 can be stably sealed inside the mold resin. It has become.

If there is no space for installing the two resin injection holes 26a and 26b, only one resin injection hole 26c in FIG. 19B may be installed.
In this case, the resin injection hole 26c provided at one place in the resin insulator 40 and the center of the resin injection hole 26c are shifted so that the center of the joint portion 62 of the insulating film 60 does not coincide (d1 in the drawing). The pressure of the molding resin injected from the resin injection hole 26c is applied only to one surface of the joint 62, and the direction in which the joint 62 falls is stabilized in a certain direction. It can be sealed inside so that the joint 62 is not peeled off and exposed to the surface of the resin insulator 40.

FIG. 20 is a perspective view showing a part of the teeth 54 of the split laminated iron core 50, the insulating film 60, the side surface pressing mechanism 20, the film bonding mechanism 21, and the molding dies 25a and 25b.
After molding the resin insulator 40, the molding dies 25a to 25d are retracted, the compression and fixing of the split laminated core 50 by the iron core pressing mechanism 22 are released, and the molded core 2 is taken out from the molding dies 25a to 25d.
At this time, the compression of the split laminated iron core 50 by the iron core pressing mechanism 22 is released, and a force is applied to the split laminated iron core 50 to return to the state before compression. Since the compressed divided laminated core 50 is housed in a frame formed integrally with the sealing portion 43 and the ribs 44a and 44b, the compressed state of the divided laminated core 50 can be maintained.

FIG. 21 is a plan view showing an example of the shape of the iron core piece according to Embodiment 1 of the present invention.
FIG. 22 is a plan view showing another example of the shape of the iron core piece according to Embodiment 1 of the present invention. When the holding force is insufficient with the ribs 44a and 44b, or when the ribs 44a and 44b cannot be installed, the back yoke 52 or as shown in the figure as long as there is no functional influence due to the decrease in the magnetic path of the divided laminated core 50 Holes 58a, 58b or grooves 55c are provided in the tooth tip protrusion 53.
Then, molding resin is filled into the holes 58a, 58b or the groove 55c, a rib as a reinforcing column is molded, and is integrally formed with the molding resin in the mold cavity 27, and is the same as the ribs 44a, 44b. The reinforcing effect is obtained.

Next, the shape of the insulating film 60 in the vicinity of the teeth tip protrusion 53 and the back yoke 52 of the divided laminated core 50 will be supplementarily described.
FIG. 23 is a diagram illustrating the shape of the insulating film 60 in the vicinity of the tooth tip protrusion 53 of the split laminated core 50.
The insulating film bending portion 67 that is in close contact with the tooth tip protruding portion 53 receives the flow force of the molding resin filled from the resin injection hole 26, but is pressed by the film bonding mechanism 21 in the same manner as the bonding portion 62, and is insulated. The end portion of the film 60 is not peeled off from the divided laminated core 50 and is not exposed on the surface of the resin insulator 40.
Further, the insulating film bending portion installed in the back yoke 52 does not include a joint portion, but the flow of the molding resin filled from the resin injection hole 26 works in a direction in which the insulating film bending portion is brought into close contact with the back yoke 52. The end portion of the insulating film 60 is not peeled off and is not exposed on the surface of the resin insulator 40.

In the present embodiment, the configuration in which the ribs 44a and 44b are formed is shown. However, even if the ribs 44a and 44b are omitted, the compressed state of the divided laminated core 50 can be maintained to some extent only by the closely attached insulating film.
In addition, a connecting part is provided at the end of the back yoke of the split laminated iron core, and a plurality of the divided laminated iron cores are connected to each other by this connecting part. It is also possible to do it.

The stator 100 of the rotating electrical machine according to the present embodiment compresses the stacked laminated cores 50 by the iron core pressing mechanism 22 and presses the insulating film 60 in close contact with the divided laminated core 50 by the film bonding mechanism 21. Therefore, the compressed state of the divided laminated iron core 50 is maintained by the insulating film 60 that is in close contact with each other, and a winding tightening phenomenon in which the divided laminated iron core 50 is compressed by the tension of pulling the electric wire in the coil winding process is prevented. It is possible to prevent the generation of wrinkles, the winding disturbance of the coils generated when the electric wire rides on the wrinkles, and the damage to the coil coating generated by rubbing the coils due to the winding disturbance, thereby preventing the deterioration of the insulation reliability.
Thereby, the stator of a rotary electric machine with high insulation performance and high efficiency can be provided.

In addition, the stator 100 of the rotating electrical machine according to the present embodiment includes a yoke flange portion 41 projecting from both end surfaces of the back yoke 52 of the split laminated core 50 in the stacking direction, and an inner periphery of the tooth tip protrusion 53 of the split stacked core 50. Teeth tip flange 42 that surrounds and seals other than the outer peripheral surface, sealing portion 43 that seals both end surfaces in the stacking direction of the teeth 54 of the split laminated core 50, and attachment of the back yoke 52 to the teeth 54 A resin insulator 40 in which a groove 55a provided in the stacking direction at the base end portion and ribs 44a and 44b formed in a groove 55b provided in the stacking direction at the base of the tooth tip protrusion 53 are integrally formed of a molding resin is provided. Therefore, the compression state of the split laminated iron core 50 is maintained by the cured molding resin, and in the subsequent coil winding process, the split lamination is performed by the tension that pulls the electric wire. Winding phenomenon that the core 50 is compressed is prevented, generation of wrinkles due to excessive insulating film 60, coil winding disturbance generated when the electric wire rides on the hook, and scratches on the coil coating generated by rubbing the coils due to winding disturbance It is possible to prevent deterioration of insulation reliability.
Thereby, the stator of a rotary electric machine with high insulation performance and high efficiency can be provided.

Further, the resin insulator 40 is sized so as to shrink in the center direction of the resin shape due to resin shrinkage after molding, but the ribs 44a and 44b integrated with the resin insulator 40 are arranged so as to hold the divided laminated core 50. Therefore, the split laminated iron core 50 serves as a pillar of the structure, and the resin shrinkage of the resin insulator 40 is suppressed.
As a result, there is no dimensional difference between the divided laminated iron core 50 and the resin insulator 40, so that it is possible to prevent the occurrence of a step at the boundary between the sealing portion 43 and the corners of both end surfaces of the teeth 54 in the lamination direction. Thereby, the tension | tensile_strength which pulls the electric wire of a coil winding process can prevent the damage | wound of the coating | cover by a level | step difference and a coil contact, improves insulation reliability, and obtains the quality improvement effect of a motor.

Moreover, since the edge part of the insulating film 60 is the structure sealed inside the sealing part 43, the peeling from the division | segmentation laminated | stacked iron core 50 of the insulating film 60 can be prevented.
Further, since the insulating film 60 is not melted by heat and adhered to the insulating resin, it is not necessary to select a material so that the melting temperature of the insulating film 60 is lower than the melting temperature of the insulating resin.
Thereby, since the material of the insulating film 60 and molding resin can be selected widely, it becomes possible to employ | adopt not only a thermoplastic resin but a thermosetting resin.

  According to the method for manufacturing a stator for a rotating electrical machine of the present embodiment, since the insulating film 60 is attached and crimped in a state where the split laminated core 50 is pressed, the compressed state of the split laminated core 50 is maintained, and the subsequent coil In the winding process, the phenomenon of winding tightening in which the split laminated core 50 is compressed by the tension of pulling the electric wire is prevented, and the generation of wrinkles due to excessive insulation film 60, the winding disturbance of the coils generated when the electric wires run on the wrinkles, It is possible to prevent damage to the coil coating that occurs when the coils rub against each other, and to prevent a decrease in insulation reliability.

Embodiment 2. FIG.
Hereinafter, the second embodiment of the present invention will be described with a focus on differences from the first embodiment.
FIG. 24 is a perspective view showing a part of the teeth 54 of the split laminated iron core 50, the insulating film 260, the side pressure bonding mechanism 20, the film bonding mechanism 21, and the molding dies 25a and 25b.
In the first embodiment, two insulating films 60 are used and the insulating film 60 is mounted on the side surface of the divided laminated core 50. However, in the present embodiment, one insulating film 260 is used.
25 (a) and 25 (b) are partial cross-sectional side views of the core.
The number of the resin injection holes 26a, 26b, 26c of the molding die 25c (the molding die 25c is not shown) and the positional relationship of the resin injection holes 26a, 26b, 26c with respect to the core are shown.
As shown in the figure, when the insulating film 260 is attached to the split laminated core 50, one end surface of the split laminated core 50 in the stacking direction has two crimping allowances 61 having the same shape as in the first embodiment.
Further, the other end surface is a crimping margin 261 having a shape in which the insulating film 260 is folded.
The method of joining the crimping margin 261 is the same as that of the first embodiment, and the crimping margins 261 are coupled to each other to form the joint portion 262.

As in the first embodiment, when two resin injection holes 26a and 26b are installed as shown in FIG. 25A, the sealing state is stabilized by adopting the joining portion 62 of the insulating film 60. can do.
In addition, when one resin injection hole 26c is installed as shown in FIG. 25B, the sealing state is stabilized and insulation reliability is ensured in the same manner as in the first embodiment (providing an offset indicated by d2 in the figure). Can improve the quality of the motor.
According to the stator of the rotating electrical machine of the present embodiment, since one insulating film 260 is used, the number of parts can be reduced.

Embodiment 3 FIG.
In the following, the third embodiment of the present invention will be described focusing on the differences from the first embodiment.
FIG. 26 is a perspective view of a split laminated iron core 350 according to Embodiment 3 of the present invention.
27A and 27B are partial cross-sectional side views of the core 2.
The number of the resin injection holes 26a, 26b, and 26d of the molding die 25c (the molding die 25c is not shown) and the positional relationship of the resin injection holes 26a, 26b, and 26d with respect to the core are shown.
The divided laminated core 350 includes recesses 57 on both end surfaces in the axial direction of the divided laminated core 350.
Then, as in Embodiment 1, the crimping allowance of the insulating film 360 is joined to form a joined portion 362, and the joined portion 362 is pushed down by the injection pressure of the insulating resin injected from the resin injection holes 26a, 26b, and 26d. As a result, it is embedded in the recess 57 and sealed.
When there is no space for installing the two resin injection holes 26a and 26b, only one resin injection hole 26d as shown in FIG. 27B is installed, and the joint 362 between the resin injection hole 26d and the insulating film 360 is formed. By arrange | positioning so that a center may correspond, the junction part 362 can be reliably embedded in the recessed part 57 with the injection pressure of insulating resin.

When the pressure of the split laminated core 350 is released after the molding resin is cured, the joint 362 is peeled from the joint 362 by the force that the compressed split laminated core 350 tries to restore before the compressed state. Tensile force is applied.
However, according to the stator of the rotating electrical machine of the present embodiment, the joining portion 362 is bent and embedded in the stacking direction with respect to the direction in which this force acts, and thus has an effect of preventing peeling.
As a result, an electrical insulation failure between the coil and the split laminated iron core 350 can be prevented to improve insulation reliability, and an effect of improving the quality of the motor can be obtained.

Embodiment 4 FIG.
Hereinafter, the fourth embodiment of the present invention will be described with a focus on the differences from the first embodiment.
FIGS. 28A and 28B are diagrams illustrating an example of the joint portion 462 of the insulating film 460. FIG.
As shown in FIG. 28 (a), the joining portion 462 of the insulating film 460 is uneven by the insulating film 460 disposed on the both end surfaces in the axial direction of the divided laminated core 50 being extended by the heat of the film joining mechanism. It has a structure joined in shape.
According to the stator of the rotating electrical machine of the present embodiment, since the insulating film 460 is not only joined in a planar shape but also has a structure joined in a concavo-convex shape, the joining strength is remarkably improved.
In addition, the uneven shape can obtain the same effect even if it has a configuration like the joint portion 462 shown in FIG.

  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.

20 side pressure bonding mechanism, 21 film bonding mechanism, 22 iron core pressing mechanism,
25a, 25b, 25c, 25d mold,
26a, 26b, 26c, 26d Resin injection hole, 27 Mold cavity part,
40 Resin insulator, 41 Yoke collar, 42 Teeth tip collar,
43,243 sealing part, 53,253 sealing part, 44a, 44b rib,
50,350 split laminated iron core, 51 iron core pieces, 52 back yoke,
53 teeth tip protrusion, 54 teeth, 55a, 55b, 55c groove,
57 Recess, 60, 260, 360, 460 Insulating film, 61, 261 Crimping allowance,
62,362,462 joint, 63 insulating resin, 66a, 66b rib hole,
67 Bending part.

Claims (11)

It is configured by arranging a split laminated iron core formed by laminating iron core pieces of a magnetic steel plate consisting of a back yoke part and a tooth part in an annular shape,
In the stator of a rotating electric machine, the divided laminated iron core has a coil winding portion around which a coil is wound.
An insulating film that is attached to the coil winding portion and insulates the coil and the divided laminated iron core,
The insulating film has joint portions where the crimping allowances of the insulating film are joined to each other at both axial end surfaces of the divided laminated core;
The joint have a sealing portion for sealing with an insulating resin,
The core pieces at both axial ends of the divided laminated core are provided with recesses,
The insulating film is bonded along the recess,
The sealing portion is a stator of a rotating electrical machine that seals the joint portion in the recess . The split laminated iron core includes a rib formed by filling the insulating resin into at least one of a groove or a hole penetrating in the axial direction of the split laminated iron core,
The stator of the rotating electrical machine according to claim 1, wherein the rib and the sealing portion are integrally formed. The stator of the rotating electrical machine according to claim 1, wherein the joint portion has an uneven shape. The stator of the rotating electrical machine according to any one of claims 1 to 3 , wherein the insulating film has bent portions that are bent along the split laminated core at both axial end surfaces of the split laminated core. It is configured by arranging a split laminated iron core formed by laminating iron core pieces of a magnetic steel plate consisting of a back yoke part and a tooth part in an annular shape,
A method of manufacturing a stator of a rotating electrical machine having a coil winding portion around which a coil is wound,
An insulating film mounting step of mounting an insulating film that insulates the coil and the divided laminated iron core on the coil winding portion;
A pressing step of pressing the divided laminated core in the axial direction of the divided laminated core;
While performing the pressing step, an insulating film crimping step of forming a joint by mutually crimping the crimping margin of the insulating film;
An insulator molding step for sealing the joint with an insulating resin ,
The insulator molding step injects the insulating resin from a resin injection hole provided in a molding die for sealing the joint, and seals the joint.
The opening of the groove of the divided laminated core that penetrates in the axial direction of the divided laminated core is closed by the movable mechanism for mounting the insulating film, penetrates in the axial direction of the divided laminated core, and enters the resin injection hole. Having a groove opening closing step for forming a communicating rib hole;
A method of manufacturing a stator for a rotating electrical machine, wherein, in the insulator molding step, the rib hole and the joint are integrally sealed with the insulating resin . The stator of the rotating electrical machine according to claim 5 , wherein the insulating film crimping step forms the joint portion after the insulating film is bent along the split laminated iron core at both axial end surfaces of the split laminated iron core. Production method. In the insulator forming step, the divided penetrating in the axial direction of the laminated core, and the resin injection hole and vertical hole of the laminated core segments which communicates with the joint portion is sealed with the insulating resin as an integral claim 5 or The manufacturing method of the stator of the rotary electric machine of Claim 6 . The position of the resin injection hole is formed with an offset from the position of the joint portion with respect to the circumferential direction of the split laminated iron core, and the insulating resin injected from the resin injection hole pushes down the joint portion. The method for manufacturing a stator for a rotating electrical machine according to any one of claims 5 to 7 , wherein the joint portion is sealed. It is configured by arranging a split laminated iron core formed by laminating iron core pieces of a magnetic steel plate consisting of a back yoke part and a tooth part in an annular shape,
A method of manufacturing a stator of a rotating electrical machine having a coil winding portion around which a coil is wound,
An insulating film mounting step of mounting an insulating film that insulates the coil and the divided laminated iron core on the coil winding portion;
A pressing step of pressing the divided laminated core in the axial direction of the divided laminated core;
While performing the pressing step, an insulating film crimping step of forming a joint by mutually crimping the crimping margin of the insulating film;
An insulator molding step for sealing the joint with an insulating resin ,
The insulator molding step injects the insulating resin from a resin injection hole provided in a molding die for sealing the joint, and seals the joint.
The position of the resin injection hole is formed with an offset from the position of the joint portion with respect to the circumferential direction of the split laminated iron core, and the insulating resin injected from the resin injection hole pushes down the joint portion. A method of manufacturing a stator of a rotating electrical machine that seals the joint . The stator of a rotating electrical machine according to claim 9, wherein the insulating film crimping step forms the joint portion after the insulating film is bent along the split laminated iron core at both axial end surfaces of the split laminated iron core. Production method. 10. In the insulator molding step, the vertical hole of the divided laminated core that penetrates in the axial direction of the divided laminated core and communicates with the resin injection hole and the joint portion are integrally sealed with the insulating resin. The manufacturing method of the stator of the rotary electric machine of Claim 10.

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