CN108475947B - Stator, motor, and method for manufacturing stator - Google Patents

Abstract

A stator arranged in a ring shape with a center axis as a center includes: a plurality of divided cores made of a magnetic material; an insulator covering at least a portion of the divided cores; and a lead wire wound around the split cores with the insulating material interposed therebetween. The plurality of divided cores are arranged in the circumferential direction. The insulating member has a connecting piece portion connecting the adjacent divided cores to each other.

Description

Stator, motor, and method for manufacturing stator

Technical Field

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

Background

Conventionally, a motor having an annular stator is known. As a method for manufacturing an annular stator, a manufacturing method having the following steps 1 to 3 is known. The 1 st step is a step of obtaining an annular core made of a magnetic material. The annular core is obtained by punching a magnetic steel plate into an annular shape using, for example, a press machine. The 2 nd step is a step of covering the annular iron core with an insulating material. The annular core is covered with an insulating material by insert molding using, for example, resin. The 3 rd step is a step of winding a conductor around the annular iron core with an insulator interposed therebetween.

In the conventional method, a large number of unnecessary portions are required in punching, and the amount of steel sheet used is large. Further, the size of the press die and the size of the press machine increase. Further, the mold used for insert molding becomes complicated. Further, when the wire is wound, a narrow space is present, and workability is deteriorated.

The above-described problems can be solved by the method for manufacturing an annular stator disclosed in japanese patent application laid-open No. 2000-197319. In the manufacturing method of jp 2000-197319 a, first, a stator coupling body in which a plurality of stator pieces are coupled by a thin portion is obtained. The stator block is composed of a tooth portion having a thin portion at both rib 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 core support portions are spaced apart from each other. The annular stator is obtained by bending the stator connecting body to connect the core support portions to each other.

In the stator disclosed in japanese patent application laid-open No. 2000-197319, adjacent teeth are connected by thin portions of electromagnetic steel plates. Therefore, magnetic flux leaks between adjacent teeth, and the motor efficiency is reduced. Further, the steel plate needs to be punched out by pressing to obtain a state in which the plurality of stator pieces are connected. Therefore, the press die or the punch becomes large, which causes problems in terms of an increase in cost and space securing of the apparatus.

Disclosure of Invention

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

An exemplary stator of the present invention is a stator disposed in a ring shape with a center axis as a center, the stator including: a plurality of divided cores made of a magnetic material; an insulator covering at least a portion of the divided cores; and a lead wire wound around the split cores with the insulating material interposed therebetween. The plurality of divided cores are arranged in the circumferential direction. The insulating member has a connecting piece portion connecting the adjacent divided cores to each other.

An exemplary motor of the present invention has the above-described exemplary stator of the present invention.

An exemplary method of manufacturing an annular stator according to the present invention includes: a first step of laminating magnetic steel sheets to form a plurality of divided cores; a 2 nd step of covering and connecting the plurality of divided cores with an insulating material to form a connected core in which the plurality of divided cores are linearly connected; a 3 rd step of winding a wire around each of the divided cores of the coupled core with the insulating material interposed therebetween; and a 4 th step of forming the linear stator wound with the lead wire into a ring shape.

According to the exemplary invention, it is possible to provide an annular stator and a motor that can reduce the cost and the work load at the time of manufacturing. Further, according to the exemplary invention, it is possible to provide a method of manufacturing an annular stator that can reduce cost and work load.

Drawings

Fig. 1 is a schematic sectional view showing a structure of a motor according to an embodiment of the present invention.

Fig. 2 is a schematic plan view showing the structure of an annular stator according to an embodiment of the present invention.

Fig. 3 is a schematic plan view of the stator shown in fig. 2 with the lead wires removed.

Fig. 4 is a schematic sectional view at a position a-a of fig. 3.

Fig. 5 is an enlarged schematic plan view showing 1 of the divided cores covered with the insulator.

Fig. 6 is a schematic plan view showing the divided core of fig. 5 from which the insulator is removed.

Fig. 7 is a schematic plan view for explaining a 1 st step included in the method for manufacturing an annular stator according to the embodiment of the present invention.

Fig. 8 is a schematic plan view for explaining the 2 nd step included in the method for manufacturing an annular stator according to the embodiment of the present invention.

Fig. 9 is a schematic plan view for explaining the 3 rd step included in 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 side of the linear stator shown in fig. 9 as viewed in the direction B.

Fig. 11 is a schematic plan view for explaining a preferred embodiment of the 3 rd step.

Fig. 12 is a schematic plan view for explaining the 4 th step included in the method for manufacturing the annular stator according to the embodiment of the present invention.

Fig. 13 is a schematic diagram for explaining a 1 st modification of the annular stator according to the embodiment of the present invention.

Fig. 14 is a schematic plan view for explaining a 2 nd modification of the annular stator according to the embodiment of the present invention.

Fig. 15 is a schematic view showing a part of a stator 1 according to a modification 2.

Fig. 16 is a schematic view showing a part of a 2 nd configuration example of a stator of the 2 nd modification.

Fig. 17 is a schematic view showing a part of a 3 rd configuration example of a stator according to a 2 nd modification.

Fig. 18 is a schematic view showing a part of a 4 th configuration example of a stator according to a 2 nd modification.

Fig. 19 is a schematic view showing a part of a 5 th configuration example of a stator according to a 2 nd modification.

Fig. 20 is a schematic view showing a part of a 6 th configuration example of a stator according to a 2 nd modification.

Detailed Description

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification, the direction of the central axis CA (see fig. 1) of the motor is simply referred to as the "axial direction", and the radial direction and the circumferential direction around the central axis CA of the motor are simply referred to as the "radial direction" and the "circumferential direction". Similarly, the stator is simply referred to as "axial", "radial", and "circumferential" in directions that coincide with the axial, radial, and circumferential directions of the motor when assembled in the motor.

< 1. Structure of motor

First, a schematic structure of a motor according to an exemplary embodiment of the present invention will be described. Fig. 1 is a schematic sectional view showing a structure of a motor 1 according to an embodiment of the present invention. Fig. 1 is a cross-sectional view obtained by cutting with a cut surface including a central axis CA of the motor 1. The motor 1 shown in fig. 1 is an outer rotor type fan motor provided in an outdoor unit of an air conditioner.

The motor 1 includes a stationary portion 2 including an annular stator 3. The stator 3 is an armature of the motor 1. Details of the stator 3 provided in the motor 1 will be described later. The stationary portion 2 has a resin-made housing 4 covering at least a part of the stator 3. The housing 4 is integrated with the stator 3 by, for example, insert molding. The housing 4 holds a bearing 5, and the bearing 5 rotatably supports a shaft 71 described later. The bearing portion 5 is not particularly limited, but is formed of, for example, a ball bearing, a sleeve bearing, or the like. A circuit board 6 axially opposed to the stator 3 is fixed to an outer surface of the housing 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 in the center of the circuit board 6.

The motor 1 has a rotating portion 7. The rotating portion 7 has a shaft 71. The shaft 71 is a columnar member extending in the axial direction. The shaft 71 is formed of metal such as stainless steel. The shaft 71 is supported by the bearing 5 and rotates about the center axis CA. The rotating portion 7 includes a rotor 72 that holds a plurality of magnets 73. The rotor 72 is fixed to the shaft 71 and rotates together with the shaft 71. The rotor 72 has a cylindrical portion 72a surrounding the outer periphery of the stator 3. The plurality of magnets 73 are fixed to the inner circumferential surface of the cylindrical portion 72 a. The plurality of magnets 73 are located radially outside the stator 3. The plurality of magnets 73 are arranged at equal intervals in the circumferential direction, and the magnetic pole surfaces of the N poles and the magnetic pole surfaces of the S poles are alternately arranged. Instead of the plurality of magnets 73, 1 ring-shaped 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 also be a different component from the rotor 72.

< 2. Structure of stator

The structure of the annular stator 3 for the motor 1 according to the exemplary embodiment of the present invention will be described in more detail. The stator 3 is annularly arranged around the center axis CA. Fig. 2 is a schematic plan view showing the structure of the annular stator 3 according to the embodiment of the present invention. Referring to fig. 2, the stator 3 includes a plurality of divided cores 30, an insulator 31, and a lead wire 32. Fig. 3 is a schematic plan view of the stator shown in fig. 2 with the lead wires 32 removed. Fig. 4 is a schematic sectional view at a position a-a of fig. 3. Fig. 5 is an enlarged schematic plan view showing 1 of the divided cores 30 covered with the insulator 31. Fig. 6 is a schematic plan view showing the divided core 30 of fig. 5 with the insulator 31 removed.

The plurality of divided cores 30 are divided from each other. In this example, the number of the divided cores 30 is 12, but this is merely an example, and the number of the divided cores 30 may be changed as appropriate. Each of the divided cores 30 is made of a magnetic material. Referring to fig. 6, the split core 30 has a yoke portion 301 extending in the circumferential direction. The split core 30 has tooth portions 302 that protrude radially outward from the yoke portion 301 and around which the lead wire 32 is wound. In detail, the tooth portion 302 has a tooth base 302a extending radially from the yoke portion 301 and winding the wire 32. The tooth portion 302 has a tooth tip portion 302b provided at the tip of the tooth base portion 302a and extending in the circumferential direction.

Referring to fig. 2 and 3, a plurality of divided cores 30 are arranged in a circumferential direction. Adjacent yokes 301 are fixed to each other. In detail, circumferential end surfaces of adjacent yokes 301 contact each other. A projection 301a is formed on one circumferential end surface of each yoke 301. A recess 301b is formed in the other circumferential end surface of each yoke 301. The protruding portion 301a and the recessed portion 301b of the adjacent yoke portion 301 are engaged with each other. This prevents the adjacent divided cores 30 from being displaced in the radial and circumferential directions.

In the present embodiment, the protruding portion 301a is formed in a substantially trapezoidal shape in a plan view. The recess 301a has a shape corresponding to the shape of the projection 301 a. However, the shapes of the protruding portion 301a and the recessed portion 301b of the present embodiment are merely illustrative. The shapes of the protruding portion 301a and the recessed portion 301b may be changed as appropriate as long as they can prevent positional deviation of the divided cores 30. For example, the protruding portion 301a may have a substantially semicircular shape in plan view.

Referring to fig. 2 and 3, the insulator 31 covers at least a portion of the division cores 30. The insulator 31 is an insulating member made of resin that electrically insulates the split cores 30 and the wires 32. The insulator 31 has a connecting piece 310 that connects the adjacent divided cores 30 to each other. The web portion 310 is preferably thin-walled. This allows the connecting piece 310 to be easily bent.

The stator 3 has at least one portion where the adjacent divided cores 30 are not connected to each other by the connecting piece 310. In this example, the adjacent divided cores 30 are not connected to each other by the connecting piece 310 at one point P. The portion P not connected by the connecting piece 310 is generated because the annular stator 3 is obtained by bending a linear stator. The method of manufacturing the stator 3 will be described later.

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

The web portions 310 are preferably located between adjacent tooth cover portions 312. In this example, as a more preferable mode, the connecting piece portion 310 is located between the adjacent tooth-end cover portions 312 b. In this configuration, since the position of the connecting piece portion 310 is on the radial distal end side, more space for winding the conductive wire 32 can be secured.

Referring to fig. 2 and 3, the stator 3 has a ring-shaped fixed ring 33. Specifically, the annular fixing ring 33 is annular. Referring to fig. 4 and 5, an insertion portion 313 into which the fixing ring 33 is inserted is formed in the yoke cover portion 311. Specifically, the yoke cover portion 311 is formed with a substantially arc-shaped 1 st ring wall portion 313a extending in the axial direction. The yoke cover portion 311 is formed with a substantially arc-shaped 2 nd ring wall portion 313b extending in the axial direction, and the 2 nd ring wall portion 313b is provided radially outward of the 1 st ring wall portion 313 a. The insertion portion 313 is a space portion formed between the 1 st ring wall portion 313a and the 2 nd ring wall portion 313 b.

In a state where the circumferential end surfaces of adjacent yokes 301 are in contact with each other, the end portions of the respective insertion portions 313 are connected to each other to form an annular space portion. By inserting the fixing ring 33 into the space portion, 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 respect to the divided cores 30. The fixing rings 33 may be inserted into both insertion portions 313, or the fixing ring 33 may be inserted into only one insertion portion 313. When the fixing ring 33 is inserted into only one of the two, the insertion portion 313 may be formed only on one side in the axial direction.

The lead wire 32 is made of a metal wire covered with an insulating member, such as an enameled copper wire. The lead wire 32 is wound around the divided core 30 with the insulator 31 interposed therebetween. Specifically, the lead wire 32 has a winding portion 321 wound around each of the plurality of divided cores 30. The lead wire 32 has a transition wire portion 322 that passes between the plurality of winding portions 321 (see fig. 10 described later). The winding portion 321 is wound around the tooth base 302a via the tooth base cover portion 312 a. The overlap wire portion 322 is disposed radially outward of each of the divided cores 30. If a drive current is supplied to the lead wire 32, a radial magnetic flux is generated in the split core 30. The rotation portion 7 can be rotated about the rotation axis CA by generating a torque in the circumferential direction by the magnetic flux in the rotation portion 7.

In detail, the motor 1 is a 3-phase motor. Therefore, the wires 32 include 3 kinds of wires corresponding to U-phase, V-phase, and W. The lead wires 32 of each phase are sequentially wound around the plurality of divided cores 30 arranged in a ring shape. That is, the lead wires 32 of each phase are wound around the plurality of split cores 30 arranged in a ring shape every two split cores 30.

Referring to fig. 4 and 5, the tooth tip cover portion 312b has a tooth tip wall portion 314 extending in the axial direction. Specifically, the tooth tip wall portions 314 protrude in two axial directions with respect to the divided cores 30. A jumper groove portion 314a in which the jumper wire portion 322 is arranged is formed on a radially outer side surface of the tooth tip end wall portion 314. In the example shown in fig. 4, the crossover groove portion 314a is formed only in one of the tooth tip wall portions 314 protruding in 2 directions. The crossover groove portions 314a are provided at 3 intervals in the axial direction. This allows the lead wires 32 of the respective phases to be arranged separately from each other, thereby preventing the lead wires 32 of the respective phases from being short-circuited.

Further, the tooth tip wall portion 314 is provided on each of the divided cores 30. The number of the overlapping wire groove portions 314a provided in each tooth tip wall portion 314 may be the same. As another mode, the number of the crossover groove portions 314a provided in each tooth tip wall portion 314 may be changed according to the position in the circumferential direction of the divided core 30.

Referring to fig. 4 and 5, terminal pins 34 are provided at axial end portions of the tooth tip wall portions 314. Specifically, the terminal pin 34 is provided on the side of the tooth tip wall portion 314 protruding in the 2 directions where the crossover groove portion 314a is not formed. The terminal pin 34 is inserted into a terminal hole 314b provided on an axial end face of the tooth end wall portion 314. The wires 32 are connected to terminal pins 34. In this example, 4 terminal pins 34 are provided corresponding to 3 phases of U-phase, V-phase, and W-phase and the common line. That is, in this example, the terminal pin 34 is provided on 4 of the plurality of tooth end wall portions 314, and the terminal pin 34 is not provided on the other tooth end wall portions 314.

In the present embodiment, the terminal pin 34 is provided in the vicinity of the portion where the bonding wire portion 322 is arranged. Therefore, the lead wire 32 can be efficiently wound. The terminal pin 34 is connected to a circuit board 6 (see fig. 1) included in the motor 1. The terminal pin 34 may be provided on the same side as the side where the bonding wire groove portion 314a is provided. In this case, the tooth tip wall portion 314 may be configured to protrude only to one side in the axial direction with respect to the divided core 30.

Each of the plurality of divided cores 30 has exposed portions 35 to 38 which are not covered with the insulator 31 but are exposed. The 1 st exposed portion 35 exposes both end surfaces of the yoke portion 301 in the circumferential direction. This allows the protrusion 301a and the recess 301b to be fitted to each other. Since the projections and recesses can be formed with higher accuracy by press forming as compared with resin molding, the fitting accuracy between the projection 301a and the recess 301b can be improved.

The 2 nd exposure portion 36 exposes both ends of the tooth tip portion 302b in the circumferential direction. The effects of this structure will be described later. The 3 rd exposed portion 37 exposes the end surface of the tooth tip portion 302b in the radial direction. This makes it possible to bring the distance between the stator 3 and the magnet 73 close to each other, thereby improving the motor efficiency.

The 4 th exposed portion 38 exposes at least one axial end face of the divided core 30. In this example, specifically, the 4 th exposure portion 38 exposes the yoke 301 and a part of both end surfaces of the tooth tip portion 302b in the axial direction. According to this configuration, when the insulator 31 is insert-molded with respect to the divided cores 30, a position for positioning the mold can be secured.

In the annular stator 3 having the above configuration, the plurality of divided cores 30 are connected by the insulator 31. Specifically, the plurality of divided cores 30 are connected by a connecting piece portion 310 made of resin that is easily bent. Therefore, the stator 3 and the motor 1 can reduce the cost and the work load at the time of manufacture. Further, since the plurality of tooth portions 302 are separated from each other, it is possible to suppress the occurrence of magnetic flux leakage between the adjacent tooth portions 302.

< 3. method for manufacturing 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 1 st step included in the method for manufacturing the annular stator 3 according to the embodiment of the present invention. In manufacturing the annular stator 3, first, the following step 1 is performed: a plurality of (12 in this example) divided cores 30 are formed by laminating magnetic steel plates. Examples of the magnetic steel sheet include a silicon steel sheet. The magnetic steel sheets are stacked in the axial direction. The split cores 30 are formed by press working. The plurality of divided cores 30 may be formed individually by 1 piece or formed together by a plurality of pieces. The formed plurality of divided cores 30 are arranged in the same direction and are linearly arranged (see fig. 7).

Fig. 8 is a schematic plan view for explaining the 2 nd step included in the method for manufacturing the annular stator 3 according to the embodiment of the present invention. After the 1 st step, the following 2 nd step is performed: the plurality of divided cores 30 are covered and connected by an insulator 31. In the step 2, the coupled core 9 in which the plurality of divided cores 30 are linearly connected is formed. The plurality of divided cores 30 are connected by the connecting piece 310. The connecting piece 310 is disposed between the adjacent tooth cover portions 312 to connect the adjacent divided cores 30 to each other. More specifically, the connecting piece 310 is disposed between the adjacent tooth-end cover portions 312 b.

The plurality of divided cores 30 may be covered with the insulating member 31 by insert molding with resin. However, a method of integrating the plurality of divided cores 30 and the insulator 31 may be a method other than insert molding. For example, the following methods and the like can be used: the insulator is made of 2 members, and the plurality of divided cores 30 are sandwiched by the 2 members. The 2 members may be joined by using a fixing member or a fitting structure such as a snap fit. 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 the 3 rd step included in the method for manufacturing the annular stator 3 according to the embodiment of the present invention. After the 2 nd step, the following 3 rd step is performed: the lead wire 32 is wound around each of the divided cores 30 of the linear connection core 9 via the insulator 31. Specifically, the lead wire 32 is wound around the tooth portion 302 via the tooth cover portion 312. More specifically, the lead wire 32 is wound around the tooth base 302a via the tooth base cover 312 a. The winding of the wire 32 is completed to obtain a linear stator 3'.

In the present embodiment, the lead wire 32 includes 3 kinds of lead wires corresponding to U-phase, V-phase, and W-phase. Fig. 10 is a schematic enlarged view of one end side of the linear stator 3' shown in fig. 9 as viewed in the direction B. First, the lead wires 32 of each phase are wound around the first divided cores 30 in a direction from the yoke portion 301 toward the distal end portions of the tooth portions 302. Thus, the first winding portion 321 is formed in the lead wire 32 of each phase. A crossover portion 322 led out to the tip end side of the tooth portion 302 is arranged in the crossover groove portion 314 a. Thereby, the wires 32 of each phase are supplied to the next divided core 30. The wires 32 of each phase in the 2 nd divided core 30 are also wound in the same manner as the first divided core 30. After the last winding portion 321 is wound by repeating this operation, the end portion of the lead wire 32 of each phase is wound around each terminal pin 34. The fixing of the wire 32 to each terminal pin 34 uses, for example, a solder joint. The electrical connection of the wire 32 and the terminal pin 34 is obtained by solder bonding.

Fig. 11 is a schematic plan view illustrating a preferred embodiment of the 3 rd step. In the 3 rd step, it is preferable that the fixture 10 is attached to the coupling core 9, and the fixture 10 is disposed on the distal end side of the tooth portion 302 to maintain the coupling core 9 in a linear shape. This enables the lead wire 32 to be wound around each of the divided cores 30 in a stable state. The fixing member 10 may be a part of a winding machine for winding, for example, a wire 32 around each of the divided cores 30.

The fastener 10 has a nail portion 10a, and the nail portion 10a is engaged with a space portion 11 surrounded by the adjacent 2 tooth portions 302 and the connecting piece portion 310. Specifically, the pawl portion 10a is sandwiched by the 3 rd exposed portion 36 of the 2 tooth tip portions 302 b. That is, the claw portion 10a can be sandwiched by a member formed by press molding. Since press forming is more accurate than resin forming, fixing of the fixture 10 to the connection core 9 can be performed accurately.

After the 3 rd step, the following 4 th step is performed: the linear stator 3' wound with the lead wire 32 is formed in a ring shape. Specifically, the yoke 301 is bent into a ring shape with the linear stator 3' facing radially inward. The projection 301a and the recess 301b can be fitted to each other while being bent into a ring shape, and the ring shape can be easily maintained. Fig. 12 is a schematic plan view for explaining the 4 th step included in the method for manufacturing the annular stator 3 according to the embodiment of the present invention. The bent portion 301ba of the recess 301b serves as a fulcrum, and the divided core 30 moves in the arrow C direction. Therefore, the protrusion 301a and the recess 301b can be easily fitted.

Since the connecting piece portion 310 is formed of a resin that can be easily bent, the linear stator 3' can be easily bent. The bonding wire portion 322 is disposed on the outer peripheral side. Therefore, the lead wires 32 can be prevented from being bent when the linear stator 3' is bent into a ring shape.

In the 4 th step, after the linear stator 3' is formed into a ring shape, the fixing ring 33 is inserted into the insertion portion 313. This results in the annular stator 3 having high roundness shown in fig. 2. The stator 3 is integrated with the housing 4 by, for example, insert molding. That is, the housing 4 covers the plurality of divided cores 30, the insulator 31, and the wires 32. Since each of the divided cores 30 is firmly fixed by the housing 4, the circular shape of the stator 3 can be maintained.

In the method of manufacturing the annular stator 3 of the present embodiment, the core forming the stator is divided into the split cores 30. Therefore, compared to the case where the core is formed in a circular shape, unnecessary portions in punching can be reduced. Further, the die or press for pressing can be made smaller than in the case where the core is made circular. Further, the die or press for punching can be made smaller than in the case where adjacent teeth are connected by thin portions of the electromagnetic steel sheet to form a linear core. Further, since the divided cores 30 can be linearly arranged to wind the lead wires 32, the winding work is easy. That is, according to the method for manufacturing the annular stator 3 of the present embodiment, the cost and the work load can be reduced. Further, a space for arranging the press apparatus can be easily secured.

< 4. variants, etc. >

Fig. 13 is a schematic diagram for explaining a 1 st modification of the annular stator 3 according to the embodiment of the present invention. In modification 1, the stator 3 includes a coupling 12 that couples adjacent yoke portions 301. The yoke 301 is formed with a mounting portion 301c to which the coupler 12 is mounted. The link 12 may be, for example, a U-shaped member. The link 12 may be formed of, for example, metal or resin. The mounting portion 301c may be a hole extending in the axial direction. According to the configuration of modification 1, the possibility of positional deviation of the plurality of divided cores 30 can be further reduced. The structure of modification 1 is preferably used for motors other than molded motors.

In the above, the annular stator 3 has a structure obtained by bending 1 linear stator 3' into an annular shape. However, this is merely exemplary. The annular stator 3 may be obtained by bending a plurality of linear stators in an arc shape and connecting them. In this configuration, a plurality of adjacent divided cores 30 are not connected to each other by the connecting piece 310.

Fig. 14 is a schematic plan view for explaining a 2 nd modification of the annular stator 3 according to the embodiment of the present invention. Fig. 14 shows a part of the ring-shaped stator 3 in an enlarged manner. At least 1 tooth 302 of the plurality of teeth 302 is provided with the 1 st coupling part 41 at one circumferential end. The 2 nd coupling part 42 is provided on the tooth part 302 adjacent to the tooth part 302 on one side in the circumferential direction on which the 1 st coupling part 41 is provided. The 1 st coupling part 41 is coupled to the 2 nd coupling part 42.

The stator 3 can be held in an annular shape by the connection of the 1 st connecting part 41 and the 2 nd connecting part 42. In the present modification, the coupling structure having the 1 st coupling part 41 and the 2 nd coupling part 42 is provided at the portion P where the adjacent divided cores 30 are not connected by the coupling piece part 310. The coupling structure of the present modification is preferably used in combination with a structure in which the roundness of the stator 3 is ensured by the fixed ring 33. This can more reliably maintain the annular state of the stator 3. The coupling structure of the present modification can be used in combination with a structure using a coupling 12 (see fig. 13) that couples adjacent yoke sections 301. In addition, when the plurality of linear stators 3' are bent in an arc shape and connected to each other to form the annular stator 3, a plurality of connection structures according to the present modification may be provided.

As described above, the annular stator 3 is obtained by performing the 4 th step of forming the linear stator 3' (see fig. 9) into an annular shape. In the present modification, of the 2 tooth portions 302 located at both end portions of the linear stator 3', the 1 st connecting portion 41 is provided in one tooth portion 302, and the 2 nd connecting portion 42 is provided in the other tooth portion 302. In the 4 th step, the 1 st coupling part 41 and the 2 nd coupling part 42 are coupled to each other. This can hold the stator 3 in an annular shape.

In the present modification, the lead wire 32 wound around the 2 tooth portions 302 provided with the 1 st coupling part 41 or the 2 nd coupling part 42 has an end portion at which winding starts or ends. For example, the tooth 302 provided with the 1 st coupling part 41 has an end at which winding starts, and the tooth 302 provided with the 2 nd coupling part 42 has an end at which winding ends. As described above, the lead wire 32 is wound around the linear coupling core 9 (see fig. 8). When the end of the lead wire 32 at which the winding is started or finished is positioned at the end of the linear coupling core 9 provided with the 1 st coupling part 41 or the 2 nd coupling part 42, the lead wire 32 can be sequentially wound around the tooth parts 302 in the order of arrangement of the tooth parts 302. That is, the work of winding the wire 32 is prevented from becoming complicated. Further, according to the configuration of the present modification, the crossover portion 322 is prevented from being disposed astride the 2 teeth portions 302 provided with the 1 st coupling portion 41 or the 2 nd coupling portion 42. Therefore, the joint structure having the 1 st joint part 41 and the 2 nd joint part 42 is prevented from interfering with the crossover part 322.

In the present modification, the terminal pin 34 connected to the end of the lead wire 32 at which the winding is started or ended is provided on 2 teeth 302 provided with the 1 st connecting part 41 or the 2 nd connecting part 42. In detail, the terminal pin 34 is mounted to the tooth-end cover portion 312 b. According to the configuration of the present modification, since the tooth 302 having the end portion where the winding of the lead wire 32 is started or ended matches the tooth 302 provided with the terminal pin 34, the end portion of the lead wire 32 can be easily wound around the terminal pin 34.

Hereinafter, a plurality of configuration examples in which the configuration of modification 2 is further embodied will be described.

(A. 1 st structural example)

Fig. 15 is a schematic view showing a part of a 1 st configuration example of a stator 3 according to a 2 nd modification. The vertical direction in fig. 15 is parallel to the axial direction, and a plurality of magnetic steel plates constituting the divided core 30 are stacked in the vertical direction in fig. 15. This is the same in fig. 16 to 18 and fig. 20 described later.

In the 1 st configuration example, the 1 st coupling part 41 and the 2 nd coupling part 42 are both provided on the insulator 31. In other words, the 1 st coupling part 41 and the 2 nd coupling part 42 are not directly provided to the tooth part 302, but are indirectly provided to the tooth part 302. Specifically, the 1 st coupling part 41 and the 2 nd coupling part 42 are both provided in the tooth end cover part 312 b. According to this configuration example, for example, when the insulator 31 is molded, the 2 coupling portions 41 and 42 can be easily formed.

One of the 1 st coupling part 41 and the 2 nd coupling part 42 has a through hole or a concave part, and the other has a convex part. The 1 st coupling part 41 and the 2 nd coupling part 42 are coupled by fitting the through hole or the concave part and the convex part. In the present configuration example, 2 coupling portions 41 and 42 can be coupled with a small number of components.

In the present configuration example, specifically, the 1 st coupling part 41 has the convex part 411. The 1 st coupling part 41 has an arm part 412 extending from one circumferential side of the tooth part 302 toward the adjacent tooth part 302. The arm portion 412 is the same as the tip end cover portion 312 b. The convex portion 411 is provided on the arm portion 412. The arm portion 412 is the same member as the projection 411. The convex portion 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 the present configuration example, the 1 st coupling portions 41 are provided on both sides in the axial direction across the divided cores 30.

The 2 nd coupling portion 42 has a through hole 421. The through hole 421 extends in the axial direction. Specifically, the through hole 421 penetrates the tooth-end cover portion 312b in the axial direction. The through hole 421 is provided in the vicinity of the other circumferential end of the tooth tip cover portion 312 b. In the present configuration example, the 2 nd coupling portions 42 are provided on both sides in the axial direction across the split cores 30.

The projection 411 is fitted into the through hole 421, whereby the 1 st coupling part 41 and the 2 nd coupling part 42 are coupled to each other. In addition, the tooth tip cover portion 312b provided with the 1 st coupling portion 41 has a stepped structure S1 in order to facilitate the fitting of the convex portion 411 into the through hole 421. By moving at least one of the 1 st coupling part 41 and the 2 nd coupling part 42 in a direction perpendicular to the axial direction, the convex part 411 and the through hole 421 can be easily fitted. Preferably, the convex portion 411 has a spherical shape, and the through hole 421 has a circular shape in a plan view. Accordingly, after the 1 st coupling part 41 and the 2 nd coupling part 42 are coupled, the coupling portion can be rotated, and the stator 3 can be prevented from being applied with no end force.

The 2 nd coupling portion 42 may have a recess that is recessed in the axial direction without the through hole 421. In this case, the concave portion is preferably spherical. Further, the following structure may be adopted: the 1 st coupling part 41 having the arm part 412 is provided with a through hole or a concave part, and the 2 nd coupling part 42 is provided with a convex part. The 1 st coupling part 41 and the 2 nd coupling part 42 may be provided on either side in the axial direction, instead of being provided on both sides in the axial direction with the split core 30 interposed therebetween.

(B, 2 nd structural example)

Fig. 16 is a schematic view showing a part of a 2 nd configuration example of a stator 3 according to a 2 nd modification. Fig. 16 shows a state before the 1 st coupling part 41 and the 2 nd coupling part 42 are coupled to each other. The 2 nd configuration example is substantially the same as the 1 st configuration example. The following description deals with points different from the first configuration example 1.

In the 2 nd configuration example, at least one of the 1 st coupling part 41 and the 2 nd coupling part 42 has an inclined surface portion 43 on a surface side of the distal end portion in the circumferential direction facing the other coupling part. The axial width of the inclined surface portion 43 becomes narrower toward the tip. Specifically, the 1 st coupling part 41 has a 1 st inclined surface portion 431 on a surface side of the distal end portion of the arm part 412 in the circumferential direction, which faces the 2 nd coupling part 42. The 1 st coupling parts 41 are provided on both sides in the axial direction with the split core 30 interposed therebetween, and each 1 st coupling part 41 has a 1 st inclined surface part 431. Due to the presence of the 1 st inclined surface portion 431, the interval of the 21 st coupling portions 41 aligned in the axial direction becomes wider toward the distal end side in the circumferential direction.

The 2 nd coupling part 42 has a 2 nd inclined surface part 432 on a surface side of the circumferential distal end part of the tooth tip cover part 312b facing the 1 st coupling part 41. The 2 nd coupling parts 42 are provided on both sides in the axial direction with the split core 30 interposed therebetween, and each 2 nd coupling part 42 has a 2 nd inclined surface part 432. Due to the presence of the 2 nd inclined surface portion 432, the width in the axial direction of the tooth portion 302 including the tooth tip cover portion 312b becomes narrower toward the distal end side in the circumferential direction. Therefore, the tooth portion 302 having the 2 nd coupling parts 42 aligned in the axial direction can be inserted between the 21 st coupling parts 41 aligned in the axial direction so as to reduce hooking.

In addition, in configuration example 2, the inclined surface portion 43 is provided in both the 1 st coupling portion 41 and the 2 nd coupling portion 42, but may be provided in only one of them. When the tip of the side where the inclined surface portion 43 is not provided hits the inclined surface portion 43, the tip moves on the inclined surface of the inclined surface portion 43 in a sliding manner. Therefore, the workability of the coupling operation of the 1 st coupling part 41 and the 2 nd coupling part 42 can be improved.

(C. 3 rd structural example)

Fig. 17 is a schematic view showing a part of a 3 rd configuration example of a stator 3 according to a 2 nd modification. In the 3 rd configuration example, one of the 1 st coupling part 41 and the 2 nd coupling part 42 is provided on the insulator 31, and the other is provided on the divided core 30. In other words, one of the 1 st coupling part 41 and the 2 nd coupling part 42 is indirectly provided to the tooth 302, and the other is directly provided to the tooth 302. In the present configuration example, the 1 st coupling portion 41 is provided on the insulator 31, and the 2 nd coupling portion 42 is provided on the divided core 30. According to this configuration example, the thickness of the portion where the coupling structure is provided can be suppressed as compared with the case where both the 1 st coupling part 41 and the 2 nd coupling part 42 are provided on the insulator 31.

Specifically, the 1 st coupling part 41 is provided in the tooth tip cover part 312b, and includes a convex part 413 and an arm part 414, as in the 1 st configuration example. The 2 nd coupling part 42 is provided at a portion exposed without being covered by the tooth end cover part 312b of the divided core 30. The 2 nd coupling part 42 has a through hole 422. The through-hole 422 is provided at least in 1 magnetic steel plate located at the most end in the axial direction. The through hole 422 extends in the axial direction. In the present configuration example, the 1 st coupling part 41 and the 2 nd coupling part 42 are provided on both sides in the axial direction across the divided core 30. By fitting the projection 413 into the through hole 422, the 1 st coupling part 41 and the 2 nd coupling part 42 are coupled.

As in the case of configuration example 1, it is preferable that the convex portion 413 has a spherical shape and the through hole 422 has a circular shape in a plan view. The 2 nd coupling part 42 may have a recess that is recessed in the axial direction without the through hole 422. In this case, the concave portion is preferably spherical. Further, the following configuration is also possible: the 1 st coupling part 41 having the arm part 414 has a through hole or a concave part, and the 2 nd coupling part 42 has a convex part. In the configuration in which the 2 nd coupling part 42 has the convex part, the divided core 30 is preferably formed of a core member. The 1 st coupling part 41 and the 2 nd coupling part 42 may be provided on both sides in the axial direction without interposing the divided core 30 therebetween, or may be provided only on one side in the axial direction. Further, similarly to configuration example 2, the 1 st coupling part 41 and the 2 nd coupling part 42 may have inclined surface portions.

(D, 4 th structural example)

Fig. 18 is a schematic view showing a part of a 4 th configuration example of a stator 3 according to a 2 nd modification. In the 4 th configuration example, one of the 1 st coupling part 41 and the 2 nd coupling part 42 is provided on the insulator 31, and the other is provided on the divided core 30, as in the 3 rd configuration example. However, in the present configuration example, unlike the 3 rd configuration example, the 1 st coupling part 41 is provided on the divided core 30, and the 2 nd coupling part 42 is provided on the insulator 31.

Specifically, the 1 st coupling part 41 has a through hole 415 extending in the axial direction. The 1 st coupling part 41 has an arm part 416 extending from 1 magnetic steel plate located at the end in the axial direction. The arm portion 416 extends from a circumferential side of the tooth portion 302 toward an adjacent tooth portion 302. The arm portion 416 is the same member as the magnetic steel plate. The arm portion 416 may be formed of a plurality of magnetic steel plates. The 2 nd coupling part 42 has a convex part 423 extending in the axial direction. The convex portion 423 is the same as the tooth tip cover portion 312 b. In the present configuration example, the 1 st coupling part 41 and the 2 nd coupling part 42 are provided on both sides in the axial direction with the split core 30 interposed therebetween. By fitting the convex portion 423 into the through hole 415, the 1 st coupling portion 41 and the 2 nd coupling portion 42 are coupled. In addition, the tooth tip cover portion 312b provided with the 2 nd coupling portion 42 has a stepped structure S2 in order to fit the convex portion 423 into the through hole 415.

Preferably, the through-hole 415 has a circular shape in a plan view, and the convex portion 423 has a spherical shape. The 1 st coupling part 41 may have a structure having a recess that is recessed in the axial direction without having the through hole 415. In this case, the concave portion is preferably spherical. Further, the following configuration may be adopted: the 1 st coupling part 41 having the arm part 416 has a convex part, and the 2 nd coupling part 42 has a through hole or a concave part. In the configuration in which the 1 st coupling part 41 has the convex part, the divided cores 30 are preferably formed of core members. The 1 st coupling part 41 and the 2 nd coupling part 42 may be provided on both sides in the axial direction without interposing the divided core 30 therebetween, or may be provided only on one side in the axial direction. Further, as in the case of the 2 nd configuration example, the 1 st coupling part 41 and the 2 nd coupling part 42 may have a structure having an inclined surface portion.

(E, 5 th structural example)

Fig. 19 is a schematic view showing a part of a 5 th configuration example of a stator 3 according to a 2 nd modification. In the 5 th structural example, the 1 st coupling part 41 and the 2 nd coupling part 42 are both provided in the insulator 31 as in the 1 st structural example. Specifically, the 1 st coupling part 41 and the 2 nd coupling part 42 are both provided in the tooth end cover part 312 b.

The 1 st coupling part 41 has a convex part 417. The 1 st coupling part 41 has an arm portion 418 extending from one circumferential side of the tooth portion 302 toward the tooth portion 302 adjacent to the one circumferential side. The arm portion 418 is the same as the tooth-tip cover portion 312 b. The projection 417 is provided at the circumferential end of the arm portion 418. The arm 418 is the same as the projection 417. The projection 417 projects in a direction perpendicular to the axial direction. The projection 417 has an arc-shaped outer periphery in a plan view. The 2 nd coupling portion 42 has a recess 424 recessed in a direction perpendicular to the axial direction. The concave portion 424 has an arc shape in a plan view. The arm 418 can be moved in a predetermined direction perpendicular to the axial direction with respect to the recess 424, whereby the projection 417 can be fitted into the recess 424. The fitting connects the 1 st connecting part 41 and the 2 nd connecting part 42. The prescribed direction may be, for example, a circumferential direction or a radial direction.

The 2 nd coupling part 42 may have a through hole extending in a direction perpendicular to the axial direction without the recess 424. Further, the following configuration is also possible: the 1 st coupling part 41 having the arm part 416 has a concave part or a through hole, and the 2 nd coupling part 42 has a convex part. The 1 st coupling part 41 and the 2 nd coupling part 42 may be provided on both sides in the axial direction with the split core 30 interposed therebetween, or may be provided only on one side in the axial direction.

(F. 6 th structural example)

Fig. 20 is a schematic view showing a part of a 6 th configuration example of a stator 3 according to a 2 nd modification. In the 6 th structural example, the 1 st coupling part 41 and the 2 nd coupling part 42 are coupled to each other by the lead 44. By connecting the 1 st connecting part 41 and the 2 nd connecting part 42 using the lead 44, the connection strength can be improved. Specifically, the 1 st coupling part 41 includes an arm portion 419 extending from one circumferential side of the tooth portion 302 toward the adjacent tooth portion 302. The arm portion 419 is the same as the tip end cover portion 312 b. The 1 st coupling portion 41 has a through hole 410 provided at the circumferential distal end side of the arm portion 419. The through hole 410 extends in the axial direction. The 1 st coupling part 41 is provided on both sides in the axial direction with the split core 30 interposed therebetween. The 1 st coupling part 41 is indirectly provided to the tooth part 302.

The 2 nd coupling portion 42 has a through hole 425. The through hole 425 extends in the axial direction and penetrates the tooth tip cover portion 312b and the divided cores 30. A part of the 2 nd coupling part 42 is directly provided to the tooth 302, and the other part is indirectly provided to the tooth 302. The pins 44 extend in the axial direction. The lead pins 44 are inserted into the through holes 410, 425 arranged in the axial direction in a state where the through hole 410 of the 1 st coupling part 41 and the through hole 425 of the 2 nd coupling part 42 are axially overlapped. Thereby, the 1 st coupling part 41 and the 2 nd coupling part 42 are coupled. In order to overlap the 2 through holes 410 and 425, the tooth tip cover portion 312b provided with the 1 st coupling portion 41 has a stepped structure S3. The pins 44 may also be provided in a T-shape, for example. In addition, the lead 44 may have a linear shape, but in this case, at least one end portion of the lead 44 is deformed by, for example, mechanical or heat treatment after being inserted into the through holes 410 and 425. This can prevent the lead 44 from coming off.

In the present configuration example, the 1 st connecting part 41 is 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 2 nd coupling part 42 may not be a through hole but a recess. The 2 nd coupling portion 42 may also have an arm portion extending to the other circumferential side, and the lead may have a structure in which the arm portions of the 2 coupling portions 41 and 42 are coupled to each other. In the present configuration example, the lead 44 extends in the axial direction. This is an example, and the lead connecting the 1 st connecting part 41 and the 2 nd connecting part 42 may extend in a direction perpendicular to the axial direction, for example. In this case, the direction of the hole into which the pin is inserted also needs to be changed. However, the structure in which the leg 44 extends in the axial direction easily improves the coupling strength between the 1 st coupling part and the 2 nd coupling part.

The configurations of the embodiments and the modifications described above are merely examples of the present invention. The configurations of the embodiment and the modification may be appropriately modified within a range not exceeding the technical idea of the present invention. Further, the plurality of embodiments and modifications may be combined and implemented within a possible range.

In the above, the case where the present invention is applied to the molded motor is shown, but the present invention may be applied to motors other than the molded motor. In the above, the present invention is applied to the outer rotor type motor, but the present invention may be applied to the inner rotor type motor. The present invention can also be applied to motors other than the motor of the outdoor unit.

Claims (34)

1. A stator is disposed in a ring shape with a center axis as a center, and includes:

a plurality of divided cores made of a magnetic material;

an insulator covering at least a portion of the divided cores; and

a lead wire wound around the divided cores with the insulating material interposed therebetween,

it is characterized in that the preparation method is characterized in that,

the plurality of divided cores are arranged in a circumferential direction,

the plurality of divided cores have:

a yoke extending in a circumferential direction; and

a tooth portion protruding radially outward from the yoke portion, the lead wire being wound around the tooth portion,

the insulating member has:

a yoke cover portion that covers at least a portion of the yoke portion;

a tooth cover portion that covers at least a part of the tooth portion; and

a connecting piece portion connecting the adjacent divided cores to each other,

the tooth portion has:

a tooth base portion extending in a radial direction from the yoke portion, the wire being wound around the tooth base portion; and

a tooth tip portion provided at a tip end of the tooth base portion and extending in a circumferential direction,

the tooth cover portion has:

a tooth base cover portion that covers at least a part of the tooth base; and

a tooth tip cover portion that covers at least a part of the tooth tip portion,

adjacent ones of the tooth tip portions are separated from each other,

the connecting piece portion is positioned between the adjacent tooth-end cover portions,

circumferential end surfaces of adjacent yokes contact with each other.

2. The stator according to claim 1,

adjacent yokes are fixed to each other.

3. The stator according to claim 2,

a protruding portion is formed on one circumferential end surface of the yoke,

a recess that engages with the protrusion is formed in the other circumferential end surface of the yoke.

4. The stator according to claim 2,

the stator further has a coupling member coupling adjacent ones of the yoke portions,

the yoke is formed with a mounting portion to which the link is mounted.

5. The stator according to claim 2,

the stator also has an annular fixed ring,

an insertion portion into which the fixing ring is inserted is formed in the yoke cover portion.

6. The stator according to claim 1,

the wire has:

a plurality of winding portions wound around the respective divided cores; and

a transition wire portion that performs a transition between the plurality of winding portions,

the tooth tip cover portion has a tooth tip wall portion extending in an axial direction,

a crossover groove portion for routing the crossover portion is formed on a radially outer surface of the tooth tip wall portion.

7. The stator according to claim 6,

a terminal pin is provided at an axial end portion of the tooth tip wall portion,

the wire is connected with the terminal pin.

8. The stator according to claim 1,

each of the plurality of divided cores has an exposed portion exposed without being covered with the insulating member.

9. The stator according to claim 8,

the exposure portion exposes at least one axial end surface of the split core.

10. The stator according to claim 1,

the stator has at least one portion where the adjacent divided cores are not connected by the connecting piece portion.

11. The stator according to claim 1,

a 1 st coupling portion is provided at an end portion on one side in a circumferential direction of at least 1 tooth portion among the plurality of tooth portions,

a 2 nd coupling part is provided on the tooth part adjacent to the tooth part provided with the 1 st coupling part on one side in the circumferential direction,

the 1 st coupling part is coupled to the 2 nd coupling part.

12. The stator according to claim 11,

the 1 st coupling part and the 2 nd coupling part are both provided on the insulator.

13. The stator according to claim 11,

one of the 1 st coupling part and the 2 nd coupling part is provided on the insulator, and the other of the 1 st coupling part and the 2 nd coupling part is provided on the split core.

14. The stator according to claim 11,

one of the 1 st coupling part and the 2 nd coupling part has a through hole or a concave part, and the other of the 1 st coupling part and the 2 nd coupling part has a convex part,

the 1 st coupling part and the 2 nd coupling part are coupled to each other by fitting the through hole or the concave part to the convex part.

15. The stator according to claim 14,

the through hole has a circular shape in a plan view, or the concave portion has a spherical shape,

the convex part is spherical.

16. The stator according to claim 14,

the through hole extends in the axial direction, or the recess is recessed in the axial direction,

the convex portion protrudes in the axial direction.

17. The stator according to claim 16,

at least one of the 1 st coupling part and the 2 nd coupling part has an inclined surface portion at a circumferential end portion on a surface side facing the other coupling part,

the width of the inclined surface portion in the axial direction becomes narrower toward the tip.

18. The stator according to claim 14,

the through hole extends in a direction perpendicular to the axial direction, or the recess is recessed in a direction perpendicular to the axial direction,

the convex portion protrudes in a direction perpendicular to the axial direction.

19. The stator according to claim 11,

the 1 st connecting portion and the 2 nd connecting portion are connected by a lead.

20. The stator according to claim 19,

the pins extend in an axial direction.

21. The stator of claim 20,

at least one of the 1 st coupling part and the 2 nd coupling part has an inclined surface portion at a circumferential end portion on a surface side facing the other coupling part,

the width of the inclined surface portion in the axial direction becomes narrower toward the tip.

22. The stator according to claim 10,

the wires wound around the adjacent 2 teeth portions at the portions not connected by the connecting piece portion have winding start or winding end ends, respectively.

23. The stator according to claim 11,

the lead wire wound around the 2 teeth portions provided with the 1 st connecting portion or the 2 nd connecting portion has an end portion at which winding starts or ends, respectively.

24. The stator according to claim 22,

terminal pins connected to the end of the wire at which winding of the wire is started or ended are provided in 2 teeth.

25. The stator according to claim 23,

terminal pins connected to the end of the wire at which winding of the wire is started or ended are provided in 2 teeth.

26. A motor is characterized in that a motor is provided,

the motor having a stator as claimed in any one of claims 1 to 25.

27. The motor of claim 26,

the motor also has a stationary portion including the stator,

the stationary portion has a resin-made case that covers the split cores, the insulator, and the wires.

28. A method for manufacturing a stator, comprising:

a first step of laminating magnetic steel sheets to form a plurality of divided cores;

a 2 nd step of covering and connecting the plurality of divided cores with an insulating material to form a connected core in which the plurality of divided cores are linearly connected;

a 3 rd step of winding a lead wire around each of the divided cores of the coupled core with the insulating material interposed therebetween; and

a 4 th step of forming the stator in a ring shape, the stator being formed in a straight shape and the lead wires being wound around the stator,

the split core includes:

a yoke portion; and

a tooth portion protruding from the yoke portion,

the insulating member has:

a yoke cover portion that covers at least a portion of the yoke portion;

a tooth cover portion that covers at least a part of the tooth portion; and

a connecting piece portion arranged between the adjacent tooth cover portions and connecting the adjacent divided cores to each other,

the tooth portion has:

a tooth base portion around which the wire is wound; and

the tooth tip portion is provided with a tooth tip portion,

the tooth cover portion has:

a tooth base cover portion that covers at least a part of the tooth base; and

a tooth tip cover portion that covers at least a part of the tooth tip portion,

in the 2 nd step, the adjacent divided cores are connected by the connecting piece portions so that the connecting piece portions are disposed between the adjacent tooth cover portions in a state where the adjacent tooth tip portions are separated from each other,

in the 4 th step, the circumferential end surfaces of the adjacent yoke portions are brought into contact with each other so that the tooth portions protrude outward in the radial direction of the ring shape.

29. The method of manufacturing a stator according to claim 28,

in the 2 nd step, the divided cores are insert-molded with resin and covered with the insulator.

30. The method of manufacturing a stator according to claim 29,

in the 3 rd step, the lead wire is wound around the tooth portion with the tooth cover portion interposed therebetween.

31. The method of manufacturing a stator according to claim 30,

in the step 3, a fixing member is attached to the coupling core, the fixing member being disposed on a distal end portion side of the tooth portion to maintain the coupling core in a linear shape.

32. The method of manufacturing a stator according to claim 31,

the fixing member has a claw portion that engages in a space portion surrounded by 2 adjacent tooth portions and the connecting piece portion.

33. The method of manufacturing a stator according to claim 32,

an insertion portion is formed on the yoke cover portion,

in the 4 th step, the linear stator is formed into a ring shape, and then the fixing ring is inserted into the insertion portion.

34. The method of manufacturing a stator according to claim 33,

of the 2 teeth located at both ends of the linear stator, a 1 st connecting part is provided on one tooth, and a 2 nd connecting part is provided on the other tooth,

in the 4 th step, the 1 st coupling part and the 2 nd coupling part are coupled to each other.

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