WO2017122606A1

WO2017122606A1 - Stator, motor, and method for manufacturing stator

Info

Publication number: WO2017122606A1
Application number: PCT/JP2017/000391
Authority: WO
Inventors: 吉田　達也; 康之新井
Original assignee: 日本電産テクノモータ株式会社
Priority date: 2016-01-13
Filing date: 2017-01-10
Publication date: 2017-07-20
Also published as: CN108475947A; JPWO2017122606A1; CN108475947B

Abstract

A stator provided annularly around a central axis has a plurality of split cores of magnetic material, an insulator that covers at least a part of the split core, and a conducting wire that is wound around the split core via the insulator. The plurality of split cores are arranged in the circumferential direction. The insulator has a coupling piece that couples adjacent split cores with each other.

Description

Stator, motor, and stator manufacturing method

The present invention relates to a stator, a motor, and a stator manufacturing method.

Conventionally, a motor having an annular stator is known. As a manufacturing method of an annular stator, a manufacturing method having the following first to third steps is known. The first step is a step of obtaining an annular core made of a magnetic material. The annular core is obtained, for example, by punching a magnetic steel sheet in an annular shape using a press machine. The second step is a step of covering the annular core with an insulator. The annular core is covered with the insulator, for example, by insert molding using resin. A 3rd step is a step which winds conducting wire around an annular core via an insulator.

In the conventional method, there are many parts that are not required at the time of punching, and the amount of steel sheet used increases. In addition, the press mold and the press are increased in size. Moreover, the metal mold | die used for insert molding becomes complicated. Moreover, when winding a conducting wire, there exists a location with a narrow space, and workability | operativity worsens.

According to the annular stator manufacturing method disclosed in Patent Document 1, it is possible to solve the above-described problems. In the manufacturing method of Patent Document 1, first, a stator coupling body is obtained in which a plurality of stator blocks are coupled by thin portions. The stator block includes a teeth portion having thin portions at both side ends, a winding portion, and a core support portion. The winding portion is obtained by winding a coil around each stator block in a state where the interval between the core support portions is open. The annular stator is obtained by bending the stator coupling body and coupling the core support portions to each other.

JP 2000-197319 A

In the stator of Patent Document 1, adjacent tooth portions are connected by thin portions of electromagnetic steel sheets. For this reason, a magnetic flux leaks between adjacent teeth parts, and motor efficiency falls. Moreover, it is necessary to punch the steel plate with a press to obtain a state in which a plurality of stator blocks are connected. For this reason, a press die and a press machine will become large, and the problem of an increase in cost and securing of the space of an installation will arise.

In view of the above, an object of the present invention is to provide an annular stator and a motor that can reduce the manufacturing cost and work load. Another object of the present invention is to provide a method of manufacturing an annular stator that can reduce cost and work load.

An exemplary stator of the present invention is a stator arranged in an annular shape around a central axis, and includes a plurality of divided cores made of a magnetic material, an insulator covering at least a part of the divided cores, and the divided cores. A conducting wire wound through the insulator. The plurality of divided cores are arranged in the circumferential direction. The insulator has a connecting piece portion that connects the divided cores adjacent to each other.

The exemplary motor of the present invention has the exemplary stator of the present invention described above.

An exemplary method for manufacturing an annular stator of the present invention includes a first step of stacking magnetic steel plates to form a plurality of divided cores, and covering and connecting the plurality of divided cores with an insulator. A second step of forming a connecting core in which the split cores are connected in a straight line, a third step of winding a conducting wire around each of the split cores of the connecting core via the insulator, and the conducting wire are wound. And a fourth step of making the linear stator annular.

According to the exemplary present invention, it is possible to provide an annular stator and motor that can reduce the manufacturing cost and work load. In addition, according to the exemplary present invention, it is possible to provide an annular stator manufacturing method capable of reducing the cost and the work load.

FIG. 1 is a schematic cross-sectional view showing a configuration of a motor according to an embodiment of the present invention. FIG. 2 is a schematic plan view showing the configuration of the annular stator according to the embodiment of the present invention. FIG. 3 is a schematic plan view of the stator shown in FIG. FIG. 4 is a schematic cross-sectional view at the position AA in FIG. FIG. 5 is an enlarged schematic plan view showing one divided core covered with an insulator. FIG. 6 is a schematic plan view showing the split core from which the insulator in FIG. 5 is removed. FIG. 7 is a schematic plan view for explaining a first step of the manufacturing method of the annular stator according to the embodiment of the present invention. FIG. 8 is a schematic plan view for explaining a second step of the manufacturing method of the annular stator according to the embodiment of the present invention. FIG. 9 is a schematic plan view for explaining a third step of the method for manufacturing the annular stator according to the embodiment of the present invention. FIG. 10 is a schematic enlarged view of one end of the linear stator shown in FIG. 9 as viewed along the B direction. FIG. 11 is a schematic plan view for explaining a preferred embodiment of the third step. FIG. 12 is a schematic plan view for explaining a fourth step of the method for manufacturing an annular stator according to the embodiment of the present invention. FIG. 13 is a schematic diagram for explaining a first modification of the annular stator according to the embodiment of the present invention. FIG. 14 is a schematic plan view for explaining a second modification of the annular stator according to the embodiment of the present invention. FIG. 15 is a partial schematic diagram illustrating a first configuration example of a stator according to a second modification. FIG. 16 is a partial schematic diagram illustrating a second configuration example of the stator according to the second modification. FIG. 17 is a partial schematic diagram illustrating a third configuration example of the stator according to the second modification. FIG. 18 is a partial schematic diagram illustrating a fourth configuration example of the stator according to the second modification. FIG. 19 is a partial schematic diagram illustrating a fifth configuration example of the stator according to the second modification. FIG. 20 is a partial schematic diagram illustrating a sixth configuration example of the stator according to the second modification.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In this specification, the direction of the central axis CA (see FIG. 1) of the motor is simply referred to as “axial direction”, and the radial direction and the circumferential direction around the central axis CA of the motor are simply “radial direction” and “ It will be called “circumferential direction”. Similarly, with regard to the stator, the directions that coincide with the axial direction, radial direction, and circumferential direction of the motor when incorporated in the motor are simply referred to as “axial direction”, “radial direction”, and “circumferential direction”. To do.

<1. Motor configuration>
First, a schematic configuration of a motor according to an exemplary embodiment of the present invention will be described. FIG. 1 is a schematic cross-sectional view showing a configuration of a motor 1 according to an embodiment of the present invention. FIG. 1 is a cross-sectional view taken along a cutting plane including the central axis CA of the motor 1. A motor 1 shown in FIG. 1 is an outer rotor type fan motor included in an outdoor unit of an air conditioner.

The motor 1 has a stationary part 2 including an annular stator 3. The stator 3 is an armature of the motor 1. Details of the stator 3 of the motor 1 will be described later. The stationary part 2 has a resin casing 4 that covers at least a part of the stator 3. The casing 4 is integrated with the stator 3 by insert molding, for example. The casing 4 holds a bearing portion 5 that rotatably supports a shaft 71 described later. The bearing portion 5 is not particularly limited in form, but is configured by, for example, a ball bearing or a sleeve bearing. A circuit board 6 facing the stator 3 in the axial direction is fixed to the outer surface of the casing 4. An electronic circuit for supplying a drive current to the stator 3 is formed on the circuit board 6. An opening through which the shaft 71 is inserted is formed at the center of the circuit board 6.

The motor 1 has a rotating part 7. The rotating unit 7 has a shaft 71. The shaft 71 is a columnar member extending in the axial direction. The shaft 71 is made of a metal such as stainless steel. The shaft 71 is supported by the bearing portion 5 and rotates about the central axis CA. The rotating unit 7 includes a rotor 72 that holds a plurality of magnets 73. The rotor 72 is fixed with respect to the shaft 71 and rotates together with the shaft 71. The rotor 72 has a cylindrical portion 72 a and surrounds the outer periphery of the stator 3. The plurality of magnets 73 are fixed to the inner peripheral surface of the cylindrical portion 72a. The plurality of magnets 73 are located on the radially outer side of the stator 3. The plurality of magnets 73 are arranged at equal intervals in the circumferential direction, and N pole magnetic pole faces and S pole magnetic pole faces are alternately arranged. Instead of the plurality of magnets 73, one annular magnet in which N poles and S poles are alternately magnetized in the circumferential direction may be used.

A plurality of blades 8 are provided on the outer peripheral surface of the rotor 72. The plurality of blades 8 are the same member as the rotor 72 and rotate together with the rotor 72. The plurality of blades 8 may be separate members from the rotor 72.

<2. Structure of stator>
The structure of the annular stator 3 for the motor 1 according to an exemplary embodiment of the present invention will be described in more detail. The stator 3 is arranged in an annular shape around the central axis CA. FIG. 2 is a schematic plan view showing the configuration of the annular stator 3 according to the embodiment of the present invention. Referring to FIG. 2, stator 3 includes a plurality of split cores 30, an insulator 31, and a conducting wire 32. FIG. 3 is a schematic plan view of the stator shown in FIG. 2 with the conducting wire 32 removed. FIG. 4 is a schematic cross-sectional view at the position AA in FIG. FIG. 5 is an enlarged schematic plan view showing one divided core 30 covered with the insulator 31. FIG. 6 is a schematic plan view showing the split core 30 from which the insulator 31 in FIG. 5 is removed.

The plurality of divided cores 30 are divided from each other. In this example, the number of divided cores 30 is twelve, but this is merely an example, and the number of divided cores 30 may be changed as appropriate. Each divided core 30 is made of a magnetic material. With reference to FIG. 6, the split core 30 has a yoke portion 301 extending in the circumferential direction. The split core 30 has a teeth portion 302 that protrudes radially outward from the yoke portion 301 and is wound with a conducting wire 32. Specifically, the tooth portion 302 has a teeth base portion 302a that extends in the radial direction from the yoke portion 301 and around which the conductive wire 32 is wound. The teeth portion 302 has a tooth tip portion 302b provided at the tip of the tooth base portion 302a and extending in the circumferential direction.

2 and 3, the plurality of divided cores 30 are arranged in the circumferential direction. Adjacent yoke portions 301 are fixed to each other. Specifically, the adjacent yoke portions 301 are in contact with each other at their circumferential end surfaces. A protruding portion 301 a is formed on one circumferential end surface of each yoke portion 301. A concave portion 301 b is formed on the other circumferential end surface of each yoke portion 301. The protruding portion 301a and the recessed portion 301b of the adjacent yoke portions 301 are engaged with each other. Thereby, it can prevent that the division | segmentation core 30 which adjoins raise | generates a positional shift in radial direction and the circumferential direction.

In the present embodiment, the protruding portion 301a is formed in a substantially trapezoidal shape in plan view. The recess 301a has a shape corresponding to the shape of the protrusion 301a. However, the shapes of the protrusions 301a and the recesses 301b in this embodiment are merely examples. The shape of the protrusion part 301a and the recessed part 301b should just be a shape which can prevent the position shift of the division | segmentation core 30, and the shape may be changed suitably. For example, the protrusion 301a may have a substantially semicircular shape in plan view.

2 and 3, the insulator 31 covers at least a part of the divided core 30. The insulator 31 is a resin insulating member that electrically insulates the split core 30 from the conductive wire 32. The insulator 31 has a connecting piece portion 310 that connects adjacent split cores 30 to each other. The connecting piece 310 is preferably thin. Thereby, the connection piece part 310 can be bent easily.

Note that the stator 3 has at least one location where the adjacent split cores 30 are not connected by the connecting piece portion 310. In this example, there is one location P where the adjacent split cores 30 are not connected by the connecting piece portion 310. Generation | occurrence | production of the location P which is not connected by the connection piece part 310 originates in the cyclic | annular stator 3 being obtained by bending a linear stator. A method for manufacturing the stator 3 will be described later.

4 and 5, the insulator 31 has a yoke cover portion 311 that covers at least a part of the yoke portion 301. The insulator 31 has a teeth cover portion 312 that covers at least a part of the teeth portion 302. The yoke cover portion 311 and the tooth cover portion 312 are provided for each divided core 30. The teeth cover portion 312 has a teeth base cover portion 312a that covers at least a part of the teeth base portion 302a. The teeth cover portion 312 has a teeth tip cover portion 312b that covers at least a part of the teeth tip portion 302b.

The connecting piece portion 310 is preferably located between adjacent tooth cover portions 312. In this example, as a more preferable aspect, the connecting piece portion 310 is located between the adjacent tooth tip cover portions 312b. In this configuration, since the position of the connecting piece portion 310 is on the distal end side in the radial direction, a large space for winding the conducting wire 32 can be secured.

Referring to FIGS. 2 and 3, the stator 3 has an annular fixing ring 33. Specifically, the annular fixing ring 33 is annular. 4 and 5, the yoke cover portion 311 is formed with an insertion portion 313 into which the fixing ring 33 is inserted. Specifically, the yoke cover portion 311 is formed with a first arc wall portion 313a having a substantially arc shape extending in the axial direction. The yoke cover portion 311 is formed with a second ring wall portion 313b having a substantially arc shape that is provided radially outward from the first ring wall portion 313a and extends in the axial direction. The insertion portion 313 is a space portion formed between the first ring wall portion 313a and the second ring wall portion 313b.

In a state where the circumferential end surfaces of the adjacent yoke portions 301 are in contact with each other, the end portions of the insertion portions 313 are connected to each other to form an annular space portion. By inserting the fixing ring 33 into this space, high roundness of the stator 3 can be ensured. In the present embodiment, the insertion portions 313 are formed on both sides in the axial direction with the split core 30 as a reference. The fixing ring 33 may be inserted into both the insertion portions 313, or the fixing ring 33 may be inserted into only one of the insertion portions 313. When the fixing ring 33 is inserted into only one side, the insertion portion 313 may be formed only on one side in the axial direction.

The conducting wire 32 is composed of a metal wire covered with an insulating member such as an enamel-coated copper wire. The conducting wire 32 is wound around the split core 30 via an insulator 31. Specifically, the conducting wire 32 has a winding portion 321 wound around each of the plurality of split cores 30. The conducting wire 32 has a crossover portion 322 (see FIG. 10 described later) that relays between the plurality of winding portions 321. Winding portion 321 is wound around teeth base portion 302a via teeth base cover portion 312a. The crossover portion 322 is wired on the radially outer side of each divided core 30. When a drive current is supplied to the conducting wire 32, a radial magnetic flux is generated in the split core 30. By utilizing this, a torque in the circumferential direction can be generated in the rotating unit 7 and the rotating unit 7 can be rotated about the rotation axis CA.

In detail, the motor 1 is a three-phase motor. For this reason, the conducting wire 32 includes three types of conducting wires corresponding to the U phase, the V phase, and the W phase. The conducting wire 32 of each phase is wound around the plurality of divided cores 30 arranged in a ring in order. That is, every two conducting wires 32 of each phase are wound around a plurality of divided cores 30 arranged in an annular shape.

4 and 5, the tooth tip cover portion 312b has a tooth tip wall portion 314 extending in the axial direction. Specifically, the teeth tip wall portion 314 protrudes in both axial directions with respect to the split core 30. A connecting wire groove portion 314 a to which the connecting wire portion 322 is wired is formed on the radially outer surface of the tooth tip wall portion 314. In the example shown in FIG. 4, the crossover groove portion 314 a is formed only on one side of the tooth tip wall portion 314 protruding in two directions. Three crossover groove portions 314a are provided at intervals in the axial direction. Thereby, the conducting wire 32 of each phase can be arrange | positioned separately, and it prevents that the conducting wire 32 of each phase short-circuits.

Note that the tooth tip wall portion 314 is provided in each divided core 30. The number of crossover groove portions 314a provided on each tooth tip wall portion 314 may be the same. As another aspect, the number of crossover groove portions 314 a provided in each tooth tip wall portion 314 may be changed according to the circumferential position of the split core 30.

4 and 5, a terminal pin 34 is provided at the axial end of the tooth tip wall 314. As shown in FIG. In detail, the terminal pin 34 is provided in the side in which the crossover groove part 314a is not formed among the teeth front-end | tip wall parts 314 which protrude in two directions. The terminal pin 34 is inserted into a terminal hole 314 b provided in the axial front end surface of the tooth front end wall portion 314. The conducting wire 32 is connected to the terminal pin 34. In this example, four terminal pins 34 are provided corresponding to the U-phase, V-phase, and W-phase three phases and the common. That is, in this example, among the plurality of tooth tip wall portions 314, the terminal pins 34 are provided on the four tooth tip wall portions 314, and the terminal pins 34 are not provided on the other tooth tip wall portions 314.

In this embodiment, the terminal pin 34 is provided near the place where the crossover portion 322 is disposed. For this reason, the conducting wire 32 can be efficiently routed. The terminal pins 34 are connected to the circuit board 6 (see FIG. 1) of the motor 1. The terminal pin 34 may be provided on the same side as the side on which the crossover groove 314a is provided. In this case, the tooth front end wall portion 314 may be configured to protrude only on one side in the axial direction with the split core 30 as a reference.

Each of the plurality of divided cores 30 has exposed portions 35 to 38 that are exposed without being covered by the insulator 31. The first exposed portion 35 exposes both end surfaces of the yoke portion 301 in the circumferential direction. Thereby, the protrusion part 301a produced by press molding and the recessed part 301b can be fitted. Since press molding can form irregularities with higher accuracy than resin molding, the fitting accuracy between the protrusion 301a and the recess 301b can be improved.

The second exposed portion 36 exposes both end portions in the circumferential direction of the tooth tip portion 302b. The effect of adopting this configuration will be described later. The third exposed portion 37 exposes the radial end surface of the tooth tip portion 302b. Thereby, the distance of the stator 3 and the magnet 73 can be shortened, and motor efficiency can be improved.

The fourth exposed portion 38 exposes at least one axial end surface of the split core 30. Specifically, in the present example, the fourth exposed portion 38 exposes part of both end surfaces in the axial direction of the yoke portion 301 and the tooth tip portion 302b. According to this structure, when insert-molding the insulator 31 with respect to the split core 30, the place which positions a metal mold | die can be ensured.

In the annular stator 3 having the above configuration, a plurality of divided cores 30 are connected by an insulator 31. Specifically, the plurality of split cores 30 are connected by a connecting piece 310 made of resin that is easy to bend. For this reason, the stator 3 and the motor 1 can reduce the manufacturing cost and work load. Moreover, since several teeth part 302 is isolate | separated from each other, it can suppress that magnetic flux leakage arises between the adjacent teeth parts 302. FIG.

<3. Manufacturing method of stator>
Next, a method for manufacturing the annular stator 3 according to an exemplary embodiment of the present invention will be described. FIG. 7 is a schematic plan view for explaining a first step of the method for manufacturing the annular stator 3 according to the embodiment of the present invention. In manufacturing the annular stator 3, first, a first process is performed in which magnetic steel plates are laminated to form a plurality (12 in this example) of divided cores 30. Examples of magnetic steel plates include silicon steel plates. Magnetic steel plates are laminated in the axial direction. Pressing is used to form the split core 30. The plurality of divided cores 30 may be formed separately one by one or may be formed collectively. The formed divided cores 30 are arranged in the same direction and arranged in a straight line (see FIG. 7).

FIG. 8 is a schematic plan view for explaining a second step of the method for manufacturing the annular stator 3 according to the embodiment of the present invention. After the first step, a second step of covering and connecting the plurality of split cores 30 with the insulator 31 is performed. By the second step, the connecting core 9 in which the plurality of divided cores 30 are connected in a straight line is formed. The plurality of split cores 30 are connected by a connecting piece portion 310. The connecting piece portion 310 is disposed between the adjacent tooth cover portions 312 and connects the adjacent divided cores 30 to each other. More specifically, the connecting piece portion 310 is disposed between the adjacent tooth tip cover portions 312b.

The plurality of split cores 30 may be insert-molded with resin and covered with the insulator 31. However, as a method for integrating the plurality of split cores 30 and the insulator 31, a method other than insert molding may be used. For example, a method in which an insulator is constituted by two members and a plurality of split cores 30 are sandwiched between the two members may be used. For the connection of the two members, a fixing member may be used, or a fitting structure such as a snap fit may be used. The fixing member may include an adhesive in addition to a fastener such as a screw.

FIG. 9 is a schematic plan view for explaining a third step of the method for manufacturing the annular stator 3 according to the embodiment of the present invention. After the second step, a third step of winding the conducting wire 32 around each split core 30 of the linear connecting core 9 via the insulator 31 is performed. Specifically, the conductive wire 32 is wound around the tooth portion 302 via the tooth cover portion 312. More specifically, the conducting wire 32 is wound around the teeth base 302a via the teeth base cover 312a. By completing the winding of the conducting wire 32, a linear stator 3 'is obtained.

In this embodiment, the conducting wire 32 includes three types of conducting wires corresponding to the U phase, the V phase, and the W phase. FIG. 10 is a schematic enlarged view of one end portion of the linear stator 3 ′ shown in FIG. 9 as viewed along the B direction. The conducting wire 32 of each phase is first wound around the first split core 30 in the direction from the yoke portion 301 toward the tip portion of the tooth portion 302. Thereby, the first winding part 321 is formed in the conducting wire 32 of each phase. The connecting wire portion 322 drawn to the tip end side of the tooth portion 302 is wired to the connecting wire groove portion 314a. Thereby, the conducting wire 32 of each phase is supplied to the next split core 30. Also in the second split core 30, the lead wires 32 of each phase are wound in the same manner as the first split core 30. After this operation is repeated and the last winding portion 321 is wound, the leading end portion of the conducting wire 32 of each phase is wound around each terminal pin 34. For example, solder bonding is used to fix the lead wires 32 to the terminal pins 34. Electrical connection between the conductive wire 32 and the terminal pin 34 is obtained by soldering.

FIG. 11 is a schematic plan view for explaining a preferred mode of the third step. In the third step, the connecting core 9 is preferably attached with a fixture 10 that is disposed on the tip end side of the tooth portion 302 and maintains the connecting core 9 in a straight line. Thereby, the conducting wire 32 can be wound around each division | segmentation core 30 in the stable state. The fixture 10 may be a part of a winding machine for winding the conducting wire 32 around each divided core 30, for example.

The fixture 10 has a claw portion 10 a that engages with a space portion 11 surrounded by two adjacent tooth portions 302 and a connecting piece portion 310. Specifically, the claw portion 10a is sandwiched between the third exposed portions 36 of the two tooth tip portions 302b. That is, the nail | claw part 10a can be pinched | interposed by the member formed by press molding. Since the press molding is more accurate than the resin molding, the connecting core 9 can be fixed with the fixing tool 10 with high accuracy.

After the third step, a fourth step is performed in which the linear stator 3 ′ around which the conducting wire 32 is wound is formed into an annular shape. Specifically, the yoke portion 301 is directed radially inward, and the linear stator 3 ′ is bent in an annular shape. The protrusion 301a and the recess 301b can be fitted together while being bent in an annular shape, and the annular shape can be easily maintained. FIG. 12 is a schematic plan view for explaining a fourth step of the method for manufacturing the annular stator 3 according to the embodiment of the present invention. The split core 30 moves in the direction of arrow C with the curved portion 301ba of the recess 301b serving as a fulcrum. For this reason, the protrusion part 301a and the recessed part 301b can be easily fitted.

Since the connecting piece 310 is formed of a resin that can be easily bent, the linear stator 3 ′ can be easily bent. The crossover portion 322 is disposed on the outer peripheral side. For this reason, it can prevent that the conducting wire 32 bends, when bending linear stator 3 'cyclically | annularly.

In the fourth step, the fixing ring 33 is inserted into the insertion portion 313 after the linear stator 3 ′ is formed into an annular shape. Thereby, the annular stator 3 having a high roundness shown in FIG. 2 is obtained. The stator 3 is integrated with the casing 4 by, for example, insert molding. That is, the casing 4 covers the plurality of divided cores 30, the insulator 31, and the conductive wire 32. Since each divided core 30 is firmly fixed by the casing 4, the circular shape of the stator 3 can be maintained.

In the manufacturing method of the annular stator 3 according to the present embodiment, the core forming the stator is the split core 30. For this reason, the part which becomes unnecessary at the time of stamping can be reduced compared with the case where a core is made into a round shape. In addition, the pressing mold and the press can be downsized compared to the case where the core is a round shape. Moreover, even if it adjoins the teeth part with the thin part of an electromagnetic steel plate, and forms a linear core, the metal mold | die for a press and a press machine can be reduced in size. Furthermore, since the divided cores 30 can be arranged in a straight line and the conductive wire 32 can be wound, the winding work is easy to perform. That is, according to the manufacturing method of the annular stator 3 of the present embodiment, the cost and work load can be reduced. Furthermore, it is possible to easily secure a space for arranging the press equipment.

<4. Modified example>
FIG. 13 is a schematic diagram for explaining a first modification of the annular stator 3 according to the embodiment of the present invention. In the first modified example, the stator 3 includes a connector 12 that connects adjacent yoke portions 301. The yoke portion 301 is formed with an attachment portion 301c for attaching the connector 12. The connector 12 may be a U-shaped member, for example. The connector 12 may be formed of, for example, metal or resin. The attachment portion 301c may be a hole extending in the axial direction. According to the configuration of the first modified example, it is possible to further reduce the possibility that the plurality of divided cores 30 are displaced. The configuration of the first modification is suitable for a motor other than a molded motor.

In the above description, the annular stator 3 is obtained by bending one linear stator 3 ′ into an annular shape. However, this is only an example. The annular stator 3 may be obtained by bending a plurality of linear stators into an arc shape and connecting them. In the case of this configuration, a plurality of portions where the adjacent split cores 30 are not connected by the connecting piece 310 are formed.

FIG. 14 is a schematic plan view for explaining a second modification of the annular stator 3 according to the embodiment of the present invention. FIG. 14 shows an enlarged part of the annular stator 3. At least one of the plurality of tooth portions 302 is provided with a first connecting portion 41 at an end portion on one circumferential side. The second connecting portion 42 is provided in the tooth portion 302 adjacent to the tooth portion 302 provided with the first connecting portion 41 on one side in the circumferential direction. The 1st connection part 41 and the 2nd connection part 42 are connected.

It is possible to keep the stator 3 annular by connecting the first connecting portion 41 and the second connecting portion 42. In this modification, the connection structure having the first connection portion 41 and the second connection portion 42 is provided at a location P where the adjacent split cores 30 are not connected by the connection piece portion 310. In addition, it is preferable that the connection structure of this modification is used together with the structure which ensures the roundness of the stator 3 by the fixing ring 33. Thereby, the annular state of the stator 3 can be more reliably maintained. Moreover, the connection structure of this modification may be used in combination with a configuration (see FIG. 13) using the connector 12 that connects adjacent yoke portions 301. Further, when the annular stator 3 is configured by bending a plurality of linear stators 3 ′ in an arc shape and connecting them, a plurality of connection structures of this modification may be provided.

As described above, the annular stator 3 is obtained by performing the fourth step of making the linear stator 3 ′ (see FIG. 9) annular. In the present modification, the first connecting portion 41 is provided on one of the two teeth portions 302 located at both ends of the linear stator 3 ′, and the second connecting portion 42 is provided on the other. In the fourth step, the first connecting portion 41 and the second connecting portion 42 are connected. This makes it possible to keep the stator 3 annular.

In this modification, each of the conductive wires 32 wound around the two teeth portions 302 provided with the first connecting portion 41 or the second connecting portion 42 has an end portion at the start or end of winding. For example, the tooth portion 302 provided with the first connecting portion 41 has an end portion at the start of winding, and the tooth portion 302 provided with the second connecting portion 42 has an end portion at the end of winding. As described above, the conducting wire 32 is wound around the linear connecting core 9 (see FIG. 8). Assuming that the end of the winding start or end of winding of the conducting wire 32 is located at the end of the linear connecting core 9 where the first connecting portion 41 or the second connecting portion 42 is provided, the arrangement order of the teeth portions 302 is as follows. Thus, the conducting wire 32 can be wound around the teeth portion 302 in order. That is, it is possible to avoid the operation of winding the conducting wire 32 from becoming complicated. Further, according to the configuration of the present modification, the crossover portion 322 can be avoided from being disposed across the two tooth portions 302 provided with the first connecting portion 41 or the second connecting portion 42. For this reason, it is possible to avoid interference between the connecting structure having the first connecting portion 41 and the second connecting portion 42 and the crossover portion 322.

In the present modification, the two teeth portions 302 provided with the first connecting portion 41 or the second connecting portion 42 are provided with terminal pins 34 connected to the end of the winding wire 32 at the start or end of winding. In detail, the terminal pin 34 is attached to the teeth front-end | tip cover part 312b. According to the configuration of the present modified example, since the tooth portion 302 having the winding start or winding end portion of the conducting wire 32 and the teeth portion 302 provided with the terminal pin 34 coincide with each other, the end portion of the conducting wire 32 is simplified. Can be tied to the terminal pin 34.

Hereinafter, a plurality of configuration examples in which the configuration of the second modification example is further embodied will be shown.

(A. First configuration example)
FIG. 15 is a partial schematic diagram illustrating a first configuration example of the stator 3 according to the second modification. The vertical direction of FIG. 15 is parallel to the axial direction, and a plurality of magnetic steel plates constituting the split core 30 are laminated in the vertical direction of FIG. This also applies to FIGS. 16 to 18 and FIG. 20 described later.

In the first configuration example, the first connecting portion 41 and the second connecting portion 42 are both provided in the insulator 31. In other words, the 1st connection part 41 and the 2nd connection part 42 are not provided in the teeth part 302 directly, but are provided in the teeth part 302 indirectly. In detail, both the 1st connection part 41 and the 2nd connection part 42 are provided in the teeth front-end | tip cover part 312b. According to this configuration example, for example, when the insulator 31 is molded, the two connecting

portions

41 and 42 can be easily formed.

Among the first connecting part 41 and the second connecting part 42, one has a through hole or a concave part, and the other has a convex part. The 1st connection part 41 and the 2nd connection part 42 are connected by the fitting of a through-hole or a recessed part, and a convex part. In this configuration example, the two connecting

portions

41 and 42 can be connected with a small number of parts.

In the present configuration example, in detail, the first connecting portion 41 has a convex portion 411. The 1st connection part 41 has the arm part 412 extended toward the adjacent teeth part 302 from the circumferential direction one side of the teeth part 302. As shown in FIG. The arm portion 412 is the same member as the tooth tip cover portion 312b. The convex portion 411 is provided on the arm portion 412. The arm part 412 and the convex part 411 are the same member. The convex part 411 protrudes in the axial direction. Specifically, the convex portion 411 extends in the axial direction from the arm portion 412 toward the split core 30. In this configuration example, the first connecting portions 41 are provided on both sides in the axial direction with the split core 30 interposed therebetween.

The second connecting part 42 has a through hole 421. The through hole 421 extends in the axial direction. Specifically, the through hole 421 passes through the teeth tip cover portion 312b in the axial direction. The through hole 421 is provided near the end on the other circumferential side of the tooth tip cover portion 312b. In the present configuration example, the second connecting portions 42 are provided on both sides in the axial direction with the split core 30 interposed therebetween.

The first connecting part 41 and the second connecting part 42 are connected by fitting the convex part 411 into the through hole 421. In addition, the teeth tip cover part 312b provided with the first connection part 41 has a step structure S1 so that the convex part 411 is easily fitted into the through hole 421. By moving at least one of the first connecting portion 41 and the second connecting portion 42 in a direction orthogonal to the axial direction, the convex portion 411 and the through hole 421 can be easily fitted. The convex portion 411 is spherical and the through hole 421 is preferably circular in plan view. Thereby, after connecting the 1st connection part 41 and the 2nd connection part 42, a connection location becomes rotatable and it can prevent that an excessive force is added to the stator 3. FIG.

In addition, the structure which has the recessed part dented in the axial direction instead of the through-hole 421 may be sufficient as the 2nd connection part 42. FIG. In this case, the recess is preferably spherical. Further, the first connecting part 41 having the arm part 412 may be provided with a through hole or a concave part, and the second connecting part 42 may be provided with a convex part. Furthermore, the 1st connection part 41 and the 2nd connection part 42 do not need to be provided in the both sides of an axial direction on both sides of the split core 30, and may be provided only in either one side of an axial direction.

(B. Second configuration example)
FIG. 16 is a partial schematic diagram illustrating a second configuration example of the stator 3 according to the second modification. In FIG. 16, the state before the 1st connection part 41 and the 2nd connection part 42 are connected is shown. The second configuration example is almost the same as the first configuration example. The following description will be focused on differences from the first configuration example.

In the second configuration example, at least one of the first connecting portion 41 and the second connecting portion 42 has the inclined surface portion 43 on the surface side facing the other connecting portion at the distal end portion in the circumferential direction. The inclined surface portion 43 narrows the axial width toward the tip. Specifically, the first connecting portion 41 has a first inclined surface portion 431 on the surface side facing the second connecting portion 42, which is the distal end portion of the arm portion 412 in the circumferential direction. The first connecting portions 41 are provided on both sides in the axial direction across the split core 30, and each first connecting portion 41 has a first inclined surface portion 431. Due to the presence of the first inclined surface portion 431, the interval between the two first connecting portions 41 arranged in the axial direction becomes wider toward the distal end side in the circumferential direction.

The second connecting portion 42 has a second inclined surface portion 432 on the surface side facing the first connecting portion 41, which is a tip portion in the circumferential direction of the tooth tip cover portion 312 b. The second connecting portions 42 are provided on both sides in the axial direction with the split core 30 interposed therebetween, and each second connecting portion 42 has a second inclined surface portion 432. Due to the presence of the second inclined surface portion 432, the axial width of the tooth portion 302 including the tooth tip cover portion 312 b becomes narrower toward the tip end side in the circumferential direction. Therefore, the tooth portion 302 having the two second connecting portions 42 arranged in the axial direction can be inserted between the two first connecting portions 41 arranged in the axial direction while being caught.

In addition, in the 2nd structural example, although it is set as the structure which provides the inclined surface part 43 in both the 1st connection part 41 and the 2nd connection part 42, you may provide only in any one. When the tip on the side where the inclined surface portion 43 is not provided hits the inclined surface portion 43, the tip moves while sliding on the inclined surface of the inclined surface portion 43. For this reason, the workability | operativity of the connection operation | work of the 1st connection part 41 and the 2nd connection part 42 can be improved.

(C. Third configuration example)
FIG. 17 is a partial schematic diagram illustrating a third configuration example of the stator 3 according to the second modification. In the third configuration example, one of the first connecting portion 41 and the second connecting portion 42 is provided in the insulator 31, and the other is provided in the split core 30. In other words, one of the first connecting part 41 and the second connecting part 42 is indirectly provided on the tooth part 302, and the other is directly provided on the tooth part 302. In this configuration example, the first connecting portion 41 is provided in the insulator 31, and the second connecting portion 42 is provided in the split core 30. According to this configuration example, the thickness of the portion where the connection structure is provided can be suppressed as compared with the case where both the first connection portion 41 and the second connection portion 42 are provided in the insulator 31.

In detail, the 1st connection part 41 is provided in teeth tip cover part 312b similarly to the 1st example of composition, and has convex part 413 and arm part 414. The 2nd connection part 42 is provided in the part exposed without being covered with the teeth front-end | tip cover part 312b of the split core 30. As shown in FIG. The second connecting portion 42 has a through hole 422. The through-hole 422 is provided in one magnetic steel plate located at least at the end in the axial direction. The through hole 422 extends in the axial direction. In this configuration example, the first connecting portion 41 and the second connecting portion 42 are provided on both sides in the axial direction with the split core 30 interposed therebetween. By fitting the convex portion 413 into the through-hole 422, the first connecting portion 41 and the second connecting portion 42 are connected.

As in the case of the first configuration example, it is preferable that the convex portion 413 has a spherical shape, and the through hole 422 has a circular shape in plan view. The 2nd connection part 42 may be the structure which has a recessed part dented in the axial direction instead of the through-hole 422. FIG. In this case, the recess is preferably spherical. Moreover, the 1st connection part 41 which has the arm part 414 is good also as a structure which has a through-hole or a recessed part, and the 2nd connection part 42 has a convex part. In the configuration in which the second connecting portion 42 has a convex portion, it is preferable that the split core 30 is configured by a core piece. Moreover, the 1st connection part 41 and the 2nd connection part 42 do not need to be provided in the both sides of an axial direction on both sides of the split core 30, and may be provided only in either one side of an axial direction. Moreover, the 1st connection part 41 and the 2nd connection part 42 may be the structure which has an inclined surface part similarly to the 2nd structural example.

(D. Fourth configuration example)
FIG. 18 is a partial schematic diagram illustrating a fourth configuration example of the stator 3 according to the second modification. As in the third configuration example, in the fourth configuration example, one of the first connection portion 41 and the second connection portion 42 is provided in the insulator 31 and the other is provided in the split core 30. However, in this configuration example, unlike the third configuration example, the first connection portion 41 is provided in the split core 30, and the second connection portion 42 is provided in the insulator 31.

Specifically, the first connecting portion 41 has a through hole 415 extending in the axial direction. The 1st connection part 41 has the arm part 416 extended from one magnetic steel plate located in the axial endmost part. The arm part 416 extends from one side in the circumferential direction of the tooth part 302 toward the adjacent tooth part 302. The arm part 416 is the same member as the magnetic steel plate. The arm portion 416 may be composed of a plurality of magnetic steel plates. The 2nd connection part 42 has the convex part 423 extended in an axial direction. The convex portion 423 is the same member as the tooth tip cover portion 312b. In this configuration example, the first connecting portion 41 and the second connecting portion 42 are provided on both sides in the axial direction with the split core 30 interposed therebetween. The first connecting part 41 and the second connecting part 42 are connected by fitting the convex part 423 into the through hole 415. In addition, the teeth tip cover part 312b in which the 2nd connection part 42 is provided has step structure S2 so that the convex part 423 may be engage | inserted by the through-hole 415. FIG.

The through-hole 415 is preferably circular in plan view, and the convex portion 423 is preferably spherical. The 1st connection part 41 may be the structure which has a recessed part dented in the axial direction instead of the through-hole 415. FIG. In this case, the recess is preferably spherical. Moreover, the 1st connection part 41 which has the arm part 416 is good also as a structure which has a convex part, and the 2nd connection part 42 has a through-hole or a recessed part. In the configuration in which the first connecting portion 41 has a convex portion, it is preferable that the split core 30 is configured by a core piece. Moreover, the 1st connection part 41 and the 2nd connection part 42 do not need to be provided in the both sides of an axial direction on both sides of the division | segmentation core 30, and may be provided only in either one side of an axial direction. Moreover, the 1st connection part 41 and the 2nd connection part 42 may be the structure which has an inclined surface part similarly to the 2nd structural example.

(E. Fifth Configuration Example)
FIG. 19 is a partial schematic diagram illustrating a fifth configuration example of the stator 3 according to the second modification. In the fifth configuration example, the first connection portion 41 and the second connection portion 42 are both provided in the insulator 31 as in the first configuration example. In detail, both the 1st connection part 41 and the 2nd connection part 42 are provided in the teeth front-end | tip cover part 312b.

The first connecting part 41 has a convex part 417. The 1st connection part 41 has the arm part 418 extended toward the teeth part 302 adjacent in the circumferential direction one side from the circumferential direction one side of the teeth part 302. As shown in FIG. The arm part 418 is the same member as the tooth tip cover part 312b. The convex portion 417 is provided at the distal end of the arm portion 418 in the circumferential direction. The arm part 418 and the convex part 417 are the same member. The convex part 417 protrudes in a direction orthogonal to the axial direction. The convex portion 417 has an arcuate outer periphery in plan view. The 2nd connection part 42 has the recessed part 424 dented in the direction orthogonal to an axial direction. The recess 424 has an arc shape in plan view. The convex portion 417 can be fitted into the concave portion 424 by moving the arm portion 418 with respect to the concave portion 424 in a predetermined direction orthogonal to the axial direction. By this fitting, the first connecting part 41 and the second connecting part 42 are connected. The predetermined direction may be, for example, a circumferential direction or a radial direction.

The 2nd connection part 42 may be the structure which has not the recessed part 424 but the through-hole extended in the direction orthogonal to an axial direction. Moreover, the 1st connection part 41 which has the arm part 416 is good also as a structure which has a recessed part or a through-hole, and the 2nd connection part 42 has a convex part. Moreover, the 1st connection part 41 and the 2nd connection part 42 may be provided in the both sides of an axial direction on both sides of the split core 30, and may be provided only in either one side of an axial direction.

(F. Sixth configuration example)
FIG. 20 is a partial schematic diagram illustrating a sixth configuration example of the stator 3 according to the second modification. In the sixth configuration example, the first connecting portion 41 and the second connecting portion 42 are connected via a pin 44. By connecting the first connecting portion 41 and the second connecting portion 42 using the pins 44, the connection strength can be improved. Specifically, the first connecting portion 41 has an arm portion 419 that extends from one circumferential side of the tooth portion 302 toward the adjacent tooth portion 302. The arm portion 419 is the same member as the tooth tip cover portion 312b. The first connecting portion 41 has a through hole 410 provided on the distal end side of the arm portion 419 in the circumferential direction. The through hole 410 extends in the axial direction. The first connecting portions 41 are provided on both sides in the axial direction with the split core 30 interposed therebetween. The 1st connection part 41 is indirectly provided in the teeth part 302. FIG.

The second connecting portion 42 has a through hole 425. The through hole 425 extends in the axial direction and penetrates the tooth tip cover portion 312 b and the split core 30. A part of the second connecting portion 42 is directly provided on the tooth portion 302, and the other portion is indirectly provided on the tooth portion 302. The pin 44 extends in the axial direction. The pin 44 is inserted into the through

holes

410 and 425 aligned in the axial direction in a state where the through hole 410 of the first connecting part 41 and the through hole 425 of the second connecting part 42 are overlapped in the axial direction. Thereby, the 1st connection part 41 and the 2nd connection part 42 are connected. In addition, the teeth tip cover part 312b in which the 1st connection part 41 is provided has the level | step difference structure S3 so that the two through-

holes

410 and 425 may overlap. The pin 44 may be provided in a T shape, for example. Moreover, although the pin 44 may be linear, in this case, after the pin 44 is inserted into the through

holes

410 and 425, at least one end is deformed by, for example, mechanical or heat treatment. This can prevent the pin 44 from falling off.

In this configuration example, the first connecting portions 41 are provided on both sides in the axial direction with the split core 30 interposed therebetween, but may be provided only on one side in the axial direction. In this case, the 2nd connection part 42 may be a recessed part instead of a through-hole. Moreover, the 2nd connection part 42 is good also as a structure which has an arm part extended in the circumferential direction other side, and a pin is good also as a structure which connects the arm parts which the two

connection parts

41 and 42 have. In this configuration example, the pins 44 extend in the axial direction. This is an example, and the pin that connects the first connecting portion 41 and the second connecting portion 42 may extend, for example, in a direction orthogonal to the axial direction. In this case, it is necessary to change the direction of the hole into which the pin is inserted. However, it is easier to improve the connection strength between the first connection part and the second connection part when the pin 44 is configured to extend in the axial direction.

The configurations of the embodiment and the modification described above are merely examples of the present invention. The configuration of the embodiment and the modification may be changed as appropriate without departing from the technical idea of the present invention. In addition, a plurality of embodiments and modifications may be implemented in combination within a possible range.

In the above, the case where the present invention is applied to a molded motor has been shown, but the present invention may be applied to a motor other than a molded motor. In the above description, the present invention is applied to an outer rotor type motor. However, the present invention may be applied to an inner rotor type motor. The present invention can also be applied to devices other than outdoor unit motors.

The present invention can be used in, for example, a stator, a motor, and a stator manufacturing method.

DESCRIPTION OF SYMBOLS 1 ... Motor, 2 ... Static part, 3 ... Ring-shaped stator, 3 '... Linear stator, 4 ... Casing, 5 ... Bearing part, 6 ... Circuit board , 7 ... rotating part, 8 ... blade, 9 ... connecting core, 10 ... fixing tool, 10a ... claw part, 11 ... space part, 12 ... connecting tool, 30 ... Split core, 31 ... Insulator, 32 ... Conductor, 33 ... Fixing ring, 34 ... Terminal pin, 35 ... First exposed part, 36 ... Second exposed 37, third exposed portion, 38 ... fourth exposed portion, 41 ... first connecting portion, 42 ... second connecting portion, 43 ... inclined surface portion, 44 ... Pin, 71 ... shaft, 72 ... rotor, 72a ... cylindrical part, 73 ... magnet, 301 ... yoke part, 301a ... projecting part, 30 b ... concave portion, 301ba ... curved portion, 301c ... mounting portion, 302 ... teeth portion, 302a ... teeth base portion, 302b ... teeth tip portion, 310 ... connecting piece portion, 311 ... Yoke cover part, 312 ... Teeth cover part, 312a ... Teeth base cover part, 312b ... Teeth tip cover part, 313 ... Insertion part, 313a ... For the first ring Wall portion, 313b ... second ring wall portion, 314 ... teeth tip wall portion, 314a ... crossover groove portion, 314b ... terminal hole, 321 ... winding portion, 322 ... Crossover part, 411, 413, 417, 423 ... convex part, 412, 414, 416, 418, 419 ... arm part, 410, 415, 421, 422, 425 ... through hole, 424 ..Recesses

Claims

A stator arranged annularly around a central axis,
A plurality of split cores made of magnetic material;
An insulator covering at least a part of the split core;
A conducting wire wound around the split core via the insulator;
Have
The plurality of divided cores are arranged in a circumferential direction,
The insulator includes a connecting piece portion that connects the divided cores adjacent to each other.
The split core is
A yoke portion extending in the circumferential direction;
A teeth portion projecting radially outward from the yoke portion and wound with the conducting wire;
Have
The insulator is
A yoke cover portion covering at least a part of the yoke portion;
A teeth cover portion covering at least a part of the teeth portion;
Have
The stator according to claim 1, wherein the connecting piece portion is located between the adjacent tooth cover portions.
The teeth part is
A teeth base extending in a radial direction from the yoke portion and around which the conductive wire is wound;
A teeth tip provided at the tip of the teeth base and extending in the circumferential direction;
Have
The teeth cover part is
A teeth base cover that covers at least a portion of the teeth base;
A teeth tip cover portion covering at least a part of the teeth tip portion;
Have
The stator according to claim 2, wherein the connecting piece portion is located between the adjacent tooth tip cover portions.
The stator according to claim 2 or 3, wherein the adjacent yoke portions are fixed to each other.
The circumferential end surfaces of the adjacent yoke portions are in contact with each other,
A protruding portion is formed on one circumferential end surface of the yoke portion,
The stator according to claim 4, wherein a concave portion that engages with the protruding portion is formed on the other circumferential end surface of the yoke portion.
It further has a connector for connecting adjacent yoke parts,
The stator according to claim 4 or 5, wherein an attachment portion for attaching the connector is formed on the yoke portion.
An annular fixing ring;
The stator according to any one of claims 2 to 6, wherein an insertion portion into which the fixing ring is inserted is formed in the yoke cover portion.
The conducting wire is
A plurality of winding portions wound around each of the plurality of divided cores;
A crossover portion that relays between the plurality of winding portions, and
The teeth tip cover portion has a teeth tip wall portion extending in the axial direction,
The stator according to claim 3, wherein a connecting wire groove portion to which the connecting wire portion is wired is formed on a radially outer surface of the tooth tip wall portion.
A terminal pin is provided at the axial end of the tooth tip wall,
The stator according to claim 8, wherein the conducting wire is connected to a terminal pin.
The stator according to any one of claims 1 to 9, wherein each of the plurality of divided cores has an exposed portion that is exposed without being covered by the insulator.
The stator according to claim 10, wherein the exposed portion exposes at least one axial end surface of the divided core.
The stator according to any one of claims 1 to 11, wherein at least one portion where the adjacent divided cores are not connected by the connecting piece portion.
At least one of the plurality of tooth portions is provided with a first connecting portion at an end on one side in the circumferential direction,
The teeth portion adjacent to the teeth portion on the one side in the circumferential direction provided with the first connecting portion is provided with a second connecting portion,
The stator according to any one of claims 2 to 8, wherein the first connecting portion and the second connecting portion are connected.
The stator according to claim 13, wherein both of the first connecting part and the second connecting part are provided in the insulator.
The stator according to claim 13, wherein one of the first connecting part and the second connecting part is provided in the insulator, and the other is provided in the split core.
Of the first connecting part and the second connecting part, one has a through hole or a concave part, and the other has a convex part,
The stator according to any one of claims 13 to 15, wherein the first connecting portion and the second connecting portion are connected by fitting the through hole or the concave portion and the convex portion.
The through hole is circular in plan view, or the concave portion is spherical.
The stator according to claim 16, wherein the convex portion has a spherical shape.
The through hole extends in the axial direction, or the concave portion is recessed in the axial direction,
The stator according to claim 16 or 17, wherein the convex portion protrudes in an axial direction.
At least one of the first connecting portion and the second connecting portion has an inclined surface portion on the surface side facing the other connecting portion at the distal end portion in the circumferential direction,
The stator according to claim 18, wherein the inclined surface portion narrows in the axial width toward the tip.
The through hole extends in a direction orthogonal to the axial direction, or the concave portion is recessed in a direction orthogonal to the axial direction,
The stator according to claim 16, wherein the convex portion projects in a direction orthogonal to the axial direction.
The stator according to any one of claims 13 to 15, wherein the first connecting portion and the second connecting portion are connected via a pin.
The stator according to claim 21, wherein the pin extends in an axial direction.
At least one of the first connecting portion and the second connecting portion has an inclined surface portion on the surface side facing the other connecting portion at the distal end portion in the circumferential direction,
The stator according to claim 22, wherein the inclined surface portion narrows in the axial direction toward the tip.
23. The conductor according to any one of claims 13 to 22, wherein each of the conductive wires wound around the two tooth portions provided with the first connection portion or the second connection portion has an end portion of winding start or winding end, respectively. The stator described.
25. The stator according to claim 24, wherein the two teeth portions are provided with terminal pins connected to ends of winding start or winding end of the conducting wire.
A motor comprising the stator according to any one of claims 1 to 25.
A stationary portion including the stator;
27. The motor according to claim 26, wherein the stationary portion includes a resin casing that covers the split core, the insulator, and the conductive wire.
A first step of laminating magnetic steel plates to form a plurality of split cores;
A second step of covering and connecting the plurality of divided cores with an insulator to form a connecting core in which the plurality of divided cores are connected in a straight line;
A third step of winding a conductive wire around each of the split cores of the connecting core via the insulator;
A fourth step of forming a linear stator around which the conducting wire is wound;
The manufacturing method of the cyclic | annular stator characterized by having.
29. The stator manufacturing method according to claim 28, wherein, in the second step, the divided core is insert-molded with a resin and covered with the insulator.
The split core is
The yoke part,
A teeth portion protruding from the yoke portion,
The insulator is
A yoke cover portion covering at least a part of the yoke portion;
A teeth cover portion covering at least a part of the teeth portion;
Have
30. The method of manufacturing a stator according to claim 28, wherein, in the third step, the conductive wire is wound around the teeth portion via the teeth cover portion.
31. The stator according to claim 30, wherein, in the third step, the connecting core is attached with a fixture that is arranged on a distal end side of the teeth portion and maintains the connecting core in a straight line. Manufacturing method.
The insulator has a connecting piece portion that is disposed between the adjacent tooth cover portions and connects the adjacent divided cores to each other.
32. The stator manufacturing method according to claim 31, wherein the fixing member has a claw portion that engages with a space portion surrounded by the two adjacent tooth portions and the connecting piece portion.
The yoke cover part is formed with an insertion part,
The method of manufacturing a stator according to any one of claims 30 to 32, wherein, in the fourth step, the fixing ring is inserted into the insertion portion after the linear stator is annular.
Of the two tooth portions located at both ends of the linear stator, one is provided with a first connecting portion, and the other is provided with a second connecting portion,
The method for manufacturing a stator according to any one of claims 30 to 33, wherein in the fourth step, the first connecting portion and the second connecting portion are connected.