JP2022156256A - Motor stator and bus bar - Google Patents

Abstract

To provide a motor stator which allows easy checking whether a bus bar unit has been correctly mounted on an insulator.SOLUTION: In a motor stator, a snap fitting claw 14 is disposed on a bus bar holder 13, and a claw engagement portion 15 is disposed on an insulator 3. The snap fitting claw 14 has a hook portion 17 that is projected radially outward from a free end of a cantilever portion 16. The claw engagement portion 15 has an engagement hole 20 that is formed so as to pass through the claw engagement portion, whereby the engagement hole receives the hook portion 17 radially from the inside and the received hook portion 17 can be visually observed from the outside.SELECTED DRAWING: Figure 4

Description

The present invention relates to motor stators and bus bars.

Generally, an electric motor has a rotor that is rotatably supported and a stator that surrounds the rotor. When a current is supplied to the stator, the rotor rotates due to the electromagnetic force acting between the stator and the rotor.

As a stator used in such an electric motor, the one disclosed in Patent Document 1 is known. The stator of Patent Document 1 includes an annular stator core having a plurality of teeth protruding radially inward from an annular yoke, coils wound around the teeth of the stator core, and coils wound around the teeth and the teeth. It has an insulator attached to the stator core so as to be interposed between the stator core and the coil, and an annular busbar unit.

The busbar unit is a member for supplying power to each coil wound around a plurality of teeth arranged at equal intervals in the circumferential direction. of busbar holders.

Here, the busbar holder is formed separately from the insulator. The busbar unit is axially connected to the insulator by engaging snap-fit claws provided on the busbar holder with claw engaging portions provided on the insulator.

JP 2020-18144 A

By the way, when assembling the motor stator of Patent Document 1, it is not possible to see the portion where the snap-fit claw engages the claw engaging portion, and the busbar unit cannot be properly attached to the insulator. It was difficult to ascertain whether it had been done.

That is, in the motor stator disclosed in Patent Literature 1, the snap-fit claw includes a cantilever portion that is radially bendable and has a fixed end at one end in the axial direction and a free end at the other end in the axial direction. and a hook projecting radially inward from the free end of the beam. On the other hand, the pawl engaging portion is a stepped portion formed radially outward of the axial projecting piece formed at the axial end portion of the insulator. The snap-fit claw is engaged with the claw engaging portion by hooking the hook portion of the snap-fit claw on the stepped portion from the outside in the radial direction.

However, in this configuration, when the snap-fit pawl is engaged with the pawl engaging portion, the radially outer side of the hook portion of the snap-fit pawl is hidden by the cantilever portion constituting the snap-fit pawl. The radially inner side of the hook is also hidden by the claw engaging portion (an axially protruding piece with a stepped portion on the radially outer side), so that the hook can be seen from both the radially outer side and the radially inner side. Can not. Therefore, there is a problem that it is difficult to check whether the busbar unit has been properly attached to the insulator when the snap-fit claw is engaged with the claw engaging portion.

SUMMARY OF THE INVENTION An object of the present invention is to provide a motor stator that allows easy confirmation of whether or not a busbar unit has been properly attached to an insulator.

In order to solve the above problems, the present invention provides a motor stator having the following configuration.
an annular stator core having an annular yoke and a plurality of teeth protruding radially inward from the yoke at regular intervals in the circumferential direction;
a plurality of coils respectively wound around the plurality of teeth;
an insulator attached to the stator core so as to be interposed between each tooth and the coil wound around the tooth;
an annular busbar unit having a busbar electrically connected to the plurality of coils and a resin busbar holder holding the busbar;
The busbar holder is formed separately from the insulator,
one of the busbar holder and the insulator is provided with a snap-fit claw,
The other of the busbar holder and the insulator is provided with a pawl engaging portion that engages with the snap-fit pawl, and the snap-fit pawl engages with the pawl engaging portion so that the busbar unit is attached to the insulator. In an axially coupled motor stator,
The snap-fit claw includes a cantilever beam portion having one end in the axial direction as a fixed end and the other end in the axial direction as a free end, the cantilever portion being radially bendable from the free end of the cantilever portion. and a hook protruding into the
The pawl engaging portion receives the hook portion from the radially inner side, and has an engagement hole formed through the hook portion in the radial direction so that the received hook portion can be visually observed from the radially outer side. A stator for a motor, characterized by:

With this configuration, the hook portion of the snap-fit pawl protrudes radially outward, and the snap-fit pawl is engaged with the hook engaging portion by receiving the hook portion in the engaging hole penetrating in the radial direction. Therefore, when the snap-fit pawl is engaged with the pawl engaging portion, the hook portion of the snap-fit pawl can be visually observed from the radially outer side through the engagement hole. Therefore, when the snap-fit claw is engaged with the claw engaging portion, it is possible to easily confirm whether or not the busbar unit has been normally attached to the insulator.

It is preferable that a plurality of the snap-fit claws and the claw engaging portions are provided at equal intervals in the circumferential direction.

By doing so, it is possible to reliably connect the busbar unit to the insulator.

It is preferable that the claw engaging portion be arranged radially inward of the outer circumference of the stator core.

By doing so, the outer diameter of the motor stator can be kept small, so that the electric motor using this stator can be made compact.

One of the busbar holder and the insulator is provided with a circumferential positioning projection projecting in the axial direction,
A configuration in which the other of the busbar holder and the insulator is provided with a circumferential positioning recess that engages with the plurality of circumferential positioning protrusions to restrict relative movement of the busbar holder and the insulator in the circumferential direction. is preferred.

With this arrangement, when a circumferential force acts on the busbar holder from the outside while the busbar unit is attached to the insulator, the circumferential force is received by the circumferential positioning projections and the circumferential positioning recesses. It is possible to prevent the force in the circumferential direction from acting on the snap-fit pawl. Therefore, the snap-fit claws are prevented from being damaged by the force in the circumferential direction, and the reliability of attachment of the busbar unit to the insulator can be enhanced.

A plurality of the circumferential positioning protrusions and the circumferential positioning recesses can be arranged at circumferential positions that equally divide the circumferentially adjacent snap-fit claws into two.

With this configuration, when the busbar unit is attached to the insulator, when a circumferential force acts on the busbar holder from the outside, the circumferential force is reliably received by the circumferential positioning projections and the circumferential positioning recesses. becomes possible.

The plurality of coils have a connecting wire that connects two of the coils that are adjacent in the circumferential direction without interposing the busbar,
When a plurality of connecting wire guide protrusions on which the connecting wire is hooked are provided on the insulator at regular intervals in the circumferential direction,
The plurality of snap-fit claws are provided at circumferential positions corresponding to between the two coils connected by the connecting wire and the coil adjacent to the two coils on one side in the circumferential direction. and the plurality of claw engaging portions are arranged,
The plurality of circumferential positioning at circumferential positions corresponding to between the two coils connected by the connecting wire and the coil adjacent to the two coils on the other side in the circumferential direction. A configuration in which the protrusion and the plurality of circumferential positioning recesses are arranged can be employed.

With this configuration, the circumferential positions of the plurality of crossover guide projections, the circumferential positions of the plurality of snap-fit claws (and the claw engaging portions with which the snap-fit claws engage), and the plurality of circumferential positioning projections (and the circumferential positioning concave portion with which the circumferential positioning convex portion engages) are dispersed in the circumferential direction. Therefore, it is possible to reduce the radial dimension of the motor stator.

When the number of each of the plurality of teeth and the plurality of coils is 12,
The plurality of connecting wire guide projections are provided at six locations at equal intervals in the circumferential direction,
The plurality of snap-fit claws and the plurality of claw engaging portions are provided at three locations at equal intervals in the circumferential direction,
A configuration in which the plurality of circumferential positioning protrusions and the plurality of circumferential positioning recesses are provided at three locations at equal intervals in the circumferential direction can be adopted.

In this manner, 6 crossover guide projections and 3 snap-fit claws (and their snap-fit claws) are engaged at 12 positions corresponding to between adjacent coils of 12 coils. claw engaging portion) and three circumferential positioning projections (and circumferential positioning recesses with which the circumferential positioning projections are engaged) can be arranged separately one by one. A particularly efficient utilization of the space at the axial ends is made possible.

In the motor stator of the present invention, the hook portion of the snap-fit claw protrudes radially outward, and the hook portion is received in the engagement hole penetrating in the radial direction so that the snap-fit claw engages with the claw. Therefore, when the snap-fit pawl is engaged with the pawl engaging portion, the hook portion of the snap-fit pawl can be viewed from the radially outer side through the engagement hole. Therefore, when the snap-fit claw is engaged with the claw engaging portion, it is possible to easily confirm whether or not the busbar unit has been normally attached to the insulator.

1 is a perspective view showing a motor stator according to an embodiment of the invention; FIG. 2 is an exploded perspective view showing a state in which a bus bar unit is separated from the motor stator of FIG. 1; FIG. FIG. 2 is an end view of the motor stator of FIG. 1 viewed in the axial direction; 3 is an exploded perspective view showing a state in which the coil is removed from the insulator shown in FIG. 2; FIG. FIG. 2 is a side view of the stator for the motor of FIG. 1; Cross-sectional view along line VI-VI in Fig. 5 FIG. 6 is an enlarged view of the vicinity of the snap-fit pawl and pawl engaging portion of FIG. 5 ; FIG. 7 is an enlarged view of the vicinity of the snap-fit pawl and pawl engaging portion in FIG.

1 and 2 show a motor stator according to an embodiment of the invention. The motor stator includes an annular stator core 1, coils 2 wound around teeth 6 of the stator core 1 (see FIG. 2), and between the teeth 6 and the coils 2 wound around the teeth 6. It has an insulator 3 mounted on the stator core 1 so as to intervene, and an annular busbar unit 4 .

As shown in FIG. 2 , the stator core 1 has an annular yoke 5 and a plurality of teeth 6 projecting radially inward from the yoke 5 . In the figure, the number of teeth 6 is twelve. These twelve teeth 6 are arranged at equal intervals in the circumferential direction. Each tooth 6 is formed integrally with the yoke 5 . The stator core 1 is formed by axially laminating annular electromagnetic steel plates (for example, silicon steel plates) having a contour shape corresponding to the axis-perpendicular cross section of the stator core 1 . As the stator core 1, it is also possible to use a green compact obtained by compression-molding metal magnetic powder with a mold.

The coil 2 is a conducting wire wound around the outer periphery of the teeth 6 . The number of coils 2 is twelve, which is the same number as the number of teeth 6 . Two coils 2 adjacent to each other in the circumferential direction are connected by a connecting wire 7 without a bus bar 8 interposed therebetween.

That is, as shown in FIG. 3, the plurality of coils 2 are configured by a plurality of coil pairs 9 each including two coils 2 adjacent in the circumferential direction. are connected via a crossover wire 7. In the figure, 12 coils 2 are composed of 6 coil pairs 9 , and two coils 2 composing each coil pair 9 are connected via a connecting wire 7 .

As shown in FIG. 2, the two coils 2 forming each coil pair 9 are wound such that the winding direction of one coil 2 is opposite to the winding direction of the other coil 2. . A coil terminal of one of the two coils 2 forming each coil pair 9 and a coil terminal of the other coil 2 are pulled out from each coil 2 to one side in the axial direction. The coil ends of the coils 2 pulled out in the axial direction are connected to the terminals of the bus bar 8 by thermal caulking or the like.

The motor stator of this embodiment is a so-called fractional slot electric motor (an electric motor in which the value obtained by dividing the number of teeth 6 by the product of the number of phases of the voltage and the number of poles of the rotor is not an integer but a fraction. ) is the stator used for In a fractional slot motor, as shown in the figure, a stator is used in which two coils 2 adjacent to each other in the circumferential direction are continuously wound, and the two coils 2 are connected by a connecting wire 7. be able to. The figure shows a stator used in a 3-phase, 10-pole, 12-slot electric motor.

As shown in FIG. 4 , the insulator 3 includes a plurality of tooth insulating portions 10 fitted to the outer periphery of each tooth 6 , a tubular yoke insulating portion 11 fitted to the radial inner surface of the yoke 5 , It has an axial end face and an axially opposed annular end 12 . The insulator 3 is molded from an insulating material (for example, resin).

Yoke insulating portion 11 is formed integrally with teeth insulating portion 10 . The annular end portion 12 is formed integrally with the yoke insulating portion 11 so as to extend radially outward from one axial end of the yoke insulating portion 11 . The insulator 3 is axially split into two at a position corresponding to the axial center of the tooth 6, and is attached to the stator core 1 so that the starter core is sandwiched between the two insulators 3 in the axial direction. there is

The busbar unit 4 is a member for supplying power to each coil 2 (see FIG. 2), and is composed of a busbar 8 electrically connected to each coil 2 and a resin-made busbar holder 13 that holds the busbar 8. It is The busbar holder 13 is formed separately from the insulator 3 .

As shown in FIGS. 3 and 6, the busbar 8 is composed of four busbars: a U-phase busbar 8U, a V-phase busbar 8V, a W-phase busbar 8W, and a neutral point busbar 8N. The busbars 8 (8U, 8V, 8W, 8N) are metallic conductive members, preferably pure copper plated with tin, for example. Also, the arrangement of 8U, 8V, and 8W may be appropriately changed depending on the direction of rotation of the motor. The busbar 8 is fixed to the busbar holder 13 by insert molding, in which the busbar holder 13 is resin-molded while the busbar 8 is set in the molding die of the busbar holder 13 .

As shown in FIG. 3, the coil terminals of one of the two coils 2 (that is, the two coils 2 forming the coil pair 9) connected by the crossover wire 7 are U-phase busbars 8U, The coil terminal of the other coil 2 of the two coils 2 connected to either the V-phase bus bar 8V or the W-phase bus bar 8W and connected by the crossover wire 7 is connected to the neutral point bus bar 8N.

As shown in FIGS. 5 and 6, snap-fit claws 14 are formed integrally with the busbar holder 13 . Further, the annular end portion 12 (see FIG. 5) of the insulator 3 is integrally formed with a pawl engaging portion 15 with which the snap-fit pawl 14 is engaged. As shown in FIG. 3, a plurality of snap-fit claws 14 are arranged at equal intervals in the circumferential direction, and correspondingly, a plurality of claw engaging portions 15 are also arranged at equal intervals in the circumferential direction.

As shown in FIG. 8, the snap-fit claw 14 includes a radially flexible cantilever portion 16 having one end in the axial direction as a fixed end and the other end in the axial direction as a free end, and a cantilever portion 16. and a hook 17 projecting radially outwardly from the free end of the .

As shown in FIG. 7, the claw engaging portion 15 includes a pair of leg portions 18 extending in the axial direction and spaced apart in the circumferential direction, and a bridge portion 19 connecting the axial ends of the pair of leg portions 18 together. have The bridge portion 19 and the pair of leg portions 18 form an engagement hole 20 for receiving the hook portion 17 .

As shown in FIG. 8, the pawl engaging portion 15 engages with the hook portion 17 of the snap-fit pawl 14 to restrict the axial movement of the busbar holder 13 in the direction away from the stator core 1, thereby regulating the busbar unit. 4 is axially connected to the insulator 3 . The engaging hole 20 receives the hook portion 17 from the inside in the radial direction and penetrates in the radial direction so that the received hook portion 17 can be seen from the outside in the radial direction (upper side in the figure).

The snap-fit claw 14 is formed with a chamfered portion 21 obliquely connecting between the axial tip end surface and the radial outer surface of the hook portion 17 . The bridge portion 19 of the claw engaging portion 15 is formed with a claw tip guide surface 22 obliquely connecting the radial inner side surface and the axial end surface of the bridge portion 19 . When the snap-fit claw 14 is engaged with the claw engaging portion 15 , the claw tip guide surface 22 guides the snap-fit claw 14 radially inward by sliding contact with the chamfered portion 21 of the hook portion 17 .

In addition, the pair of leg portions 18 (see FIG. 7) has claw side guide surfaces 23 that face each other in the circumferential direction inside the bridge portion 19 in the radial direction. Directional both sides are guided. The snap-fit claws 14 are arranged radially inward of the outer circumference of the stator core 1 so as not to have a portion protruding radially outward from the outer circumference of the stator core 1 when engaged with the claw engaging portion 15 . there is

In a state where the snap-fit claw 14 is engaged with the claw engaging portion 15, the radial elastic force of the cantilever beam portion 16 of the snap-fit claw 14 pushes the cantilever beam portion 16 of the snap-fit claw 14 radially outward. is elastically pressed against the radially inner surface of the bridge portion 19 of the pawl engaging portion 15 , thereby radially positioning the busbar holder 13 with respect to the stator core 1 .

As shown in FIG. 4 , the busbar holder 13 is integrally formed with a plurality of circumferential positioning projections 24 projecting axially toward the stator core 1 . The annular end portion 12 of the insulator 3 is integrally formed with a plurality of circumferential positioning recesses 25 at positions corresponding to the circumferential positioning projections 24 . The circumferential positioning projections 24 engage with the circumferential positioning recesses 25 to restrict relative movement of the busbar holder 13 and the insulator 3 in the circumferential direction. As shown in FIG. 3, the circumferential positioning protrusions 24 and the circumferential positioning recesses 25 are arranged at circumferential positions that bisect the space between the circumferentially adjacent snap-fit claws 14 .

The circumferential positioning recess 25 has a shape penetrating in the axial direction, and as shown in FIG. The axial movement of the busbar holder 13 in the direction toward the stator core 1 is restricted by contacting the axial end face of the yoke 5 of the stator core 1 . The circumferential positioning recess 25 may be dimensioned to have a circumferential interference with respect to the circumferential positioning protrusion 24 , and the circumferential positioning protrusion 24 may be press-fitted into the circumferential positioning recess 25 .

As shown in FIG. 2, the annular end portion 12 of the insulator 3 is integrally formed with a plurality of connecting wire guide projections 26 on which the connecting wire 7 is hooked. The crossover wire guide projection 26 has a shape protruding axially from the annular end portion 12 toward the busbar holder 13 , and the crossover wire 7 is wound around the radially outer surface of the crossover wire guide projection 26 . . The crossover guide protrusions 26 are arranged at regular intervals in the circumferential direction.

As shown in FIG. 3, the snap-fit claws 14 and the claw engaging portions 15 are connected to two coils 2 constituting each coil pair 9 and to one side of the two coils 2 in the circumferential direction (in the figure, It is arranged at a circumferential position corresponding to the coil 2 adjacent to the counterclockwise side). The circumferential positioning convex portion 24 and the circumferential positioning concave portion 25 are arranged on the two coils 2 constituting each coil pair 9 and on the other side of the two coils 2 in the circumferential direction (clockwise in the figure). It is arranged at a corresponding circumferential position between adjacent coils 2 .

The plurality of crossover guide projections 26 are provided at six locations at equal intervals in the circumferential direction, and the snap-fit claws 14 and the claw engaging portions 15 are provided at three locations at equal intervals in the circumferential direction. The portions 24 and the circumferential positioning recesses 25 are provided at three locations at equal intervals in the circumferential direction. That is, 6 crossover guide projections 26 and 3 snap-fit claws 14 (and their snap-fit claws 14 are engaged) at 12 positions corresponding to between the adjacent coils 2 of the 12 coils 2. The pawl engaging portion 15) and the three circumferential positioning protrusions 24 (and the circumferential positioning recesses 25 with which the circumferential positioning protrusions 24 are engaged) are arranged separately one by one. ing.

In this motor stator, as shown in FIG. 8, the projection direction of the hook portion 17 of the snap-fit claw 14 is radially outward, and the hook portion 17 is received in the engagement hole 20 penetrating in the radial direction. Since the snap fit claw 14 is engaged with the claw engaging portion 15, when the snap fit claw 14 is engaged with the claw engaging portion 15 as shown in FIG. The portion 17 can be viewed from the radially outer side through the engagement hole 20 . Therefore, when the snap-fit claws 14 are engaged with the claw engaging portions 15, it is possible to easily confirm whether or not the busbar unit 4 has been properly attached to the insulator 3.

In addition, as shown in FIG. 1, when the busbar unit 4 is attached to the insulator 3 and a circumferential force is applied to the busbar holder 13 from the outside, the motor stator receives the circumferential force. It is received by the directional positioning projection 24 and the circumferential positioning recess 25, and the snap-fit pawl 14 can be prevented from being subjected to a force in the circumferential direction. Therefore, the snap-fit claws 14 are prevented from being damaged by the force in the circumferential direction, and the attachment of the busbar unit 4 to the insulator 3 is highly reliable.

In addition, as shown in FIG. 3, this motor stator has a circumferential position of the connecting wire guide projections 26 and a circumferential direction of the snap-fit claws 14 (and the claw engaging portions 15 with which the snap-fit claws 14 are engaged). The position and the circumferential positions of the plurality of circumferential positioning projections 24 (and the circumferential positioning recesses 25 with which the circumferential positioning projections 24 are engaged) are dispersed in the circumferential direction. , the radial dimension of the motor stator can be kept small because there is no need to increase the dimension on the outer diameter side in order to avoid interference between these constituent elements.

In the above embodiment, a stator used for an electric motor with 10 poles and 12 slots has been described as an example, but the present invention is similarly applicable to stators used for electric motors with fractional slots having other configurations. be able to.

In the above embodiment, of the snap-fit claw 14 and the claw engaging portion 15, the snap-fit claw 14 is provided on the busbar holder 13 and the claw engaging portion 15 is provided on the insulator 3. The portion 15 may be provided on the busbar holder 13 and the snap-fit claw 14 may be provided on the insulator 3 .

In the above-described embodiment, of the circumferential positioning projections 24 and the circumferential positioning recesses 25, the circumferential positioning projections 24 are provided in the busbar holder 13, and the circumferential positioning recesses 25 are provided in the insulator 3. Conversely, the circumferential positioning concave portion 25 may be provided on the busbar holder 13 and the circumferential positioning convex portion 24 may be provided on the insulator 3 .

It should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the meaning and range of equivalents of the scope of the claims.

1 Stator Core 2 Coil 3 Insulator 4 Busbar Unit 5 Yoke 6 Teeth 7 Crossover Wire 8 Busbar 13 Busbar Holder 14 Snap Fit Claw 15 Claw Engagement Portion 16 Cantilever Portion 17 Hook Portion 20 Engagement Hole 24 Circumferential Positioning Protrusion 25 Circumference Direction positioning concave portion 26 Crossover wire guide projection

Claims (7)

An annular stator core (1) having an annular yoke (5) and a plurality of teeth (6) protruding radially inward from the yoke (5) at regular intervals in the circumferential direction;
a plurality of coils (2) respectively wound around the plurality of teeth (6);
an insulator (3) attached to the stator core (1) so as to be interposed between each tooth (6) and the coil (2) wound around the tooth (6);
An annular busbar unit (4) having a busbar (8) electrically connected to the plurality of coils (2) and a resin busbar holder (13) holding the busbar (8). death,
The busbar holder (13) is formed separately from the insulator (3),
One of the busbar holder (13) and the insulator (3) is provided with a snap-fit claw (14),
The other of the busbar holder (13) and the insulator (3) is provided with a claw engaging portion (15) that engages with the snap fit claw (14), and the snap fit claw (14) engages with the claw. In a stator for a motor in which the busbar unit (4) is axially connected to the insulator (3) by engaging with the joining portion (15),
The snap-fit claw (14) includes a radially flexible cantilever portion (16) having one end in the axial direction as a fixed end and the other end in the axial direction as a free end; ) and a hook portion (17) projecting radially outward from the free end of the
The claw engaging portion (15) receives the hook portion (17) from the radially inner side and penetrates in the radial direction so that the received hook portion (17) can be visually observed from the radially outer side. A stator for a motor, characterized in that it has an engaging hole (20) formed in a shape. 2. The motor stator according to claim 1, wherein a plurality of said snap-fit claws (14) and said claw engaging portions (15) are provided at equal intervals in the circumferential direction. 3. The motor stator according to claim 2, wherein the claw engaging portion (15) is arranged radially inward of the outer circumference of the stator core (1). One of the busbar holder (13) and the insulator (3) is provided with a circumferential positioning projection (24) protruding in the axial direction,
The other of the busbar holder (13) and the insulator (3) is engaged with the plurality of circumferential positioning projections (24) to provide a circumferential alignment of the busbar holder (13) and the insulator (3). 4. The motor stator according to claim 2 or 3, further comprising circumferential positioning recesses (25) for restricting relative movement. A plurality of said circumferential direction positioning protrusions (24) and said circumferential direction positioning recesses (25) are arranged at positions in the circumferential direction that bisect a space between said snap fit claws (14) adjacent in the circumferential direction. 5. The motor stator according to 4. The plurality of coils (2) have a connecting wire (7) that connects every two coils (2) that are adjacent in the circumferential direction without interposing the bus bar (8),
The insulator (3) is provided with a plurality of connecting wire guide projections (26) on which the connecting wire (7) is hooked at regular intervals in the circumferential direction,
Correspondence between the two coils (2) connected by the connecting wire (7) and the coil (2) adjacent to the two coils (2) on one side in the circumferential direction The plurality of snap-fit claws (14) and the plurality of claw engaging portions (15) are arranged at circumferential positions where
Correspondence between the two coils (2) connected by the connecting wire (7) and the coil (2) adjacent to the two coils (2) on the other side in the circumferential direction 6. The motor stator according to claim 4 or 5, wherein the plurality of circumferential positioning protrusions (24) and the plurality of circumferential positioning recesses (25) are arranged at circumferential positions corresponding to each other. The number of the plurality of teeth (6) and the number of the plurality of coils (2) is 12 each,
The plurality of connecting wire guide projections (26) are provided at six locations at equal intervals in the circumferential direction,
The plurality of snap-fit claws (14) and the plurality of claw engaging portions (15) are provided at three locations at equal intervals in the circumferential direction,
7. The stator for a motor according to claim 6, wherein the plurality of circumferential positioning protrusions (24) and the plurality of circumferential positioning recesses (25) are provided at three locations at equal intervals in the circumferential direction.

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