JP2012231561A - Stator manufacturing method and stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator manufacturing method that reduces manufacturing costs and allows coils to be secured to a core, and to provide a stator.SOLUTION: Each of stators 1 to 3 has an annular coil group that is formed by mounting a plurality of resin cassette coils 12, or a plurality of wound-on-insulator coils 52 or 68, on respective teeth 18 of an annular core 10. In a method for manufacturing the stators 1 to 3, resin rings 16, 48, 72, or 76 including thermoplastic resin are joined to a perimeter of the coil group by welding or thermal caulking so as to secure the coil group to the core 10.

Description

  The present invention relates to a stator manufacturing method and a stator in which a resin cassette coil or an insulator winding coil is fixed to a stator core in a motor.

  First, as background art related to a stator, Patent Document 1 discloses that a coil member is divided into core members by sandwiching a tooth portion of the split core member between inner surfaces of a flange member formed integrally with the coil member by a mold member. A method of fixing to the above is disclosed.

JP 2009-254171 A

  However, according to the method disclosed in Patent Document 1, when there is a clearance between the inner surface of the flange member and the teeth portion of the split core member, the coil member is securely fixed to the split core member. I can't. Therefore, the coil member may be pulled away from the core under the influence of the rotational torque of the rotor arranged inside the core composed of a plurality of divided core members. If the coil member is pulled away from the core in this way, the coil member and the rotor interfere with each other, which may hinder the driving of the motor and stop the vehicle on which the motor is mounted.

  Therefore, it is necessary to securely fix the coil to the core. For example, an insulator in which the coil is wound and the stator core, or a resin cassette coil in which the coil is sealed with resin and the stator core are used as an adhesive. The method of fixing with can be considered. However, in this method of fixing with an adhesive, the handling of the adhesive is inconvenient, the cost required for quality control after fixing is increased, and the manufacturing cost of the stator is increased.

  Moreover, although the conducting wire which comprises a coil has ensured insulation with the enamel film, it is necessary to ensure the insulation between each coil with which two or more are mounted | worn with a core. Therefore, conventionally, the coil is sealed with an unsaturated polyester resin (BMC) in which calcium carbonate or glass fiber is mixed with an unsaturated ester, or the coil is fixed by impregnation with varnish.

  However, since the coil that generates heat is wrapped by the resin having low heat dissipation, the cooling performance of the motor is lowered. Further, since the resin is poured into the portion where the lead-side coil end and the counter-lead-side coil end of the coil are positioned with respect to the stator core, the weight increases. Further, when the motor is cooled by, for example, ATF (automatic transmission fluid), it is necessary to take measures for dissolving the adhesive.

  Therefore, the present invention has been made to solve the above-described problems, and it is an object to provide a stator manufacturing method and a stator capable of fixing a coil to a core while reducing manufacturing costs. And

  One aspect of the present invention made in order to solve the above problem is that a plurality of cassette coils in which coils are sealed with an insulating resin or insulator winding coils in which coils are wound around a resin insulator are mounted on teeth of an annular core. In the manufacturing method of the stator having the formed annular coil group, the coil group is fixed to the core by bonding a resin ring made of a thermoplastic resin around the coil group by welding or heat caulking. Features.

  According to this aspect, the coil group is fixed to the core by bonding a resin ring made of a thermoplastic resin around the coil group by welding or heat caulking. Therefore, parts such as the collar member in Patent Document 1 are not necessary, and the manufacturing cost can be reduced. Moreover, since the management cost and material cost after joining can be significantly reduced as compared with the case where the core and the coil group are joined with an adhesive as in the prior art, the manufacturing cost can be reduced.

  In the above aspect, the coil group includes a lead-side coil end positioned on an end surface connected to a lead wire connected to an external power source in the axial direction of the core, and the lead-side coil end of the core. An anti-lead-side coil end positioned on the end surface on the opposite side in the axial direction, and an annular bus bar module in which a bus bar to be connected to the coil is sealed with a thermoplastic resin is joined to the lead-side coil end by welding, It is preferable to join the resin ring to at least one of the lead side coil end and the anti-lead side coil end.

  According to this aspect, the annular bus bar module is joined to the lead side coil end by welding, and the resin ring is joined to at least one of the lead side coil end or the anti-lead side coil end. Therefore, the coil group and the core can be fixed together and the coil group and the bus bar module can be fixed simultaneously, so that the manufacturing process of the stator can be facilitated and the manufacturing time can be shortened.

  In the said aspect, it is preferable that the circumference | surroundings of the said coil group are the outer peripheral surfaces of the said coil group.

  According to this aspect, since the resin ring is joined to the outer peripheral surface of the coil group by welding or heat caulking, it is possible to perform welding or heat caulking joining work from the outside of the outer peripheral surface of the coil group, facilitating the joining work. Can be achieved.

  In the said aspect, it is preferable that the circumference | surroundings of the said coil group are inner peripheral surfaces of the said coil group.

  According to this aspect, since the resin ring is joined to the inner peripheral surface of the coil group by welding or heat caulking, the circumference of the resin ring can be reduced, and the manufacturing cost can be reduced by suppressing the material cost. it can.

  In the said aspect, it is preferable that the circumference | surroundings of the said coil group are the outer peripheral surface and inner peripheral surface of the said coil group.

  According to this aspect, since the resin ring is bonded to both the outer peripheral surface and the inner peripheral surface of the coil group by welding or heat caulking, the fixed state between the coil group and the core is stabilized.

  In the said aspect, it is preferable that the said thermoplastic resin is polyphenylene sulfide, a liquid crystal polymer, or polyamide.

  According to this aspect, since polyphenylene sulfide, liquid crystal polymer, or polyamide, which is an inexpensive material, is used as the thermoplastic resin, the manufacturing cost can be reduced by suppressing the material cost.

  Another aspect of the present invention made to solve the above problems is that a plurality of cassette coils in which coils are sealed with an insulating resin or insulator winding coils in which coils are wound around a resin insulator are mounted on teeth of an annular core. In the stator having an annular coil group formed by bonding the coil group to the core by joining a resin ring made of a thermoplastic resin around the coil group by welding or heat caulking. Features.

  According to this aspect, the coil group is fixed to the core by bonding a resin ring made of a thermoplastic resin around the coil group by welding or heat caulking. Therefore, parts such as the collar member in Patent Document 1 are not necessary, and the manufacturing cost can be reduced. Moreover, since the management cost and material cost after joining can be reduced as compared with the case where the core and the coil group are joined with an adhesive as in the prior art, the manufacturing cost can be reduced.

  According to the stator manufacturing method and the stator according to the present invention, it is possible to fix the coil to the core while reducing the manufacturing cost.

In Example 1, it is an external appearance perspective view of the stator which used the polygonal resin ring for the outer peripheral surface of a coil group. It is AA sectional drawing of FIG. It is a disassembled perspective view of the stator which used the polygonal resin ring in Example 1 for the outer peripheral surface of a coil group. It is an external appearance perspective view of a resin cassette coil. 1 is an external perspective view of a stator using a circular resin ring on an outer peripheral surface of a coil group in Example 1. FIG. It is a disassembled perspective view of the stator which uses the circular resin ring in Example 1 for the outer peripheral surface of a coil group. In Example 1, it is an external appearance perspective view of the stator which joined only the bus bar module to the lead side coil end of the resin cassette coil. FIG. 8 is an external perspective view (partially a cross-sectional view) of a part of the stator when cut along a BB cross section in FIG. 7. It is an external appearance perspective view of the stator which uses the insulator winding coil in Example 1. FIG. FIG. 10 is a perspective view (partially a cross-sectional view) of a part of the stator when cut along a CC cross section in FIG. 9. It is an external appearance perspective view of an insulator winding coil. It is DD sectional drawing of FIG. It is an external appearance perspective view of the stator which uses the insulator winding coil which has a collar part in Example 1. FIG. FIG. 14 is an external perspective view (partially a cross-sectional view) of a part of the stator when cut along a section EE in FIG. 13. It is an external appearance perspective view of the insulator winding coil which has a collar part. It is FF sectional drawing of FIG. In Example 2, it is an external appearance perspective view of the stator which used the polygonal resin ring for the internal peripheral surface of a coil group. It is a disassembled perspective view of the stator which used the polygonal resin ring in Example 2 for the internal peripheral surface of a coil group. In Example 2, it is an external appearance perspective view of the stator which used the circular resin ring for the internal peripheral surface of a coil group. It is a disassembled perspective view of the stator which used the circular resin ring in Example 2 for the internal peripheral surface of a coil group. In Example 3, it is an external appearance perspective view of the stator which used the polygonal resin ring for the outer peripheral surface and inner peripheral surface of a coil group. It is a disassembled perspective view of the stator which used the polygonal resin ring in Example 3 for the outer peripheral surface and inner peripheral surface of a coil group.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings.

<Example 1>
[Structure of stator]
As shown in FIGS. 1-3, the stator 1A of Example 1 which is an example of the stator in this invention has the core 10, the resin cassette coil 12, the bus bar module 14, the resin ring 16, etc. As shown in FIG. The core 10 is formed in an annular shape and includes teeth 18 on the inner side in the radial direction. Here, as an example, 15 teeth 18 are formed, but the number of teeth 18 is not limited to this and can be changed as appropriate. 1 is an external perspective view of the stator 1 according to the first embodiment, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is an exploded perspective view of the stator 1 according to the first embodiment.

  As shown in FIG. 3, a plurality of resin cassette coils 12 are mounted on the teeth 18 of the core 10. As an example, 15 resin cassette coils 12 are mounted according to the number of the teeth 18. . The plurality of resin cassette coils 12 thus mounted forms an annular coil group. As shown in FIG. 4, the resin cassette coil 12 has a coil 20 sealed with a resin 22 having an insulating property. Thus, by sealing the coil 20 with the resin 22, the insulation between the coils 20 of each resin cassette coil 12 is securable. For example, by using an inexpensive thermoplastic resin such as PPS (polyphenylene sulfide), LCP (liquid crystal polymer), or PA (polyamide) as the resin 22, the manufacturing cost of the resin cassette coil 12 and the stator 1 can be reduced. be able to. If the use environment temperature is low, a thermoplastic resin such as PBT (polybutylene terephthalate), PET (polyethylene terephthalate), SPS (syndiotactic polystyrene), or the like can be used as the resin 22. FIG. 4 is an external perspective view of the resin cassette coil 12.

  In addition, the resin cassette coil 12 includes an opening 24 that penetrates in the direction of the central axis of the coil 20 on the inner side of the inner peripheral surface of the coil 20. The resin cassette coil 12 can be mounted on the teeth 18 of the core 10 by inserting the teeth 18 of the core 10 into the opening 24. The resin cassette coil 12 includes a lead-side coil end 26 and an anti-lead-side coil end 28, and a shaft 32 that protrudes toward the side where the bus bar module 14 is disposed on the surface 30 of the lead-side coil end 26. ing. The shaft 32 is used for positioning the bus bar module 14 as will be described later. Here, the lead-side coil end 26 and the anti-lead-side coil end 28 are portions located on the axial end surface of the core 10 when the resin cassette coil 12 is mounted on the core 10. The lead-side coil end 26 is a portion located on the end face on the side connected to a lead wire (not shown) connected to an external power source (not shown) in the axial direction of the core 10. On the other hand, the non-lead-side coil end 28 is a portion located on the end surface on the opposite side in the axial direction of the core 10 with respect to the lead-side coil end 26, and is a portion not connected to the lead wire.

  The bus bar module 14 is formed in an annular shape. In this example, the outer shape of the outer peripheral portion is a regular 15-sided shape. In this bus bar module 14, a bus bar 34 (see FIG. 2) connected between the coils 20 of each resin cassette coil 12 is sealed with a resin 36. As the resin 36, an insulating and inexpensive thermoplastic resin such as PPS (polyphenylene sulfide), LCP (liquid crystal polymer) or PA (polyamide) is used. If the use environment temperature is low, a thermoplastic resin such as PBT (polybutylene terephthalate), PET (polyethylene terephthalate), or SPS (syndiotactic polystyrene) can be used as the resin 36. The bus bar module 14 includes a hole 38 that penetrates in the central axis direction. The hole 38 is a hole for inserting and positioning the shaft 32 of the resin cassette coil 12 as will be described later.

  The resin ring 16 is formed of an inexpensive thermoplastic resin such as PPS (polyphenylene sulfide), LCP (liquid crystal polymer), or PA (polyamide). In the example shown in FIG. 1, the resin ring 16 is joined to the outer peripheral surface 42 of the resin cassette coil 12 at the lead side coil end 26 and the anti-lead side coil end 28 of the resin cassette coil 12. In this manner, a coil group including a plurality of resin cassette coils 12 is fixed to the core 10. In the example shown in FIG. 1 and FIG. 3, the resin ring 16 is formed in a polygonal shape (regular 15-sided), whereby the outer peripheral surface 42 of the resin cassette coil 12 attached to the core 10 and the inner peripheral surface of the resin ring 16. A larger contact area with 44 (welding area) is secured. If the use environment temperature is low, the resin ring 16 may be formed of a thermoplastic resin such as PBT (polybutylene terephthalate), PET (polyethylene terephthalate), or SPS (syndiotactic polystyrene).

[Method for manufacturing stator]
Next, in the manufacturing method of the stator 1 having such a configuration, a method for fixing the coil group to the core will be described in particular. First, the resin cassette coil 12 formed by sealing the coil 20 wound with the conductor with the resin 22 and the bus bar module 14 formed by sealing the bus bar 34 with the resin 36 are prepared.

  Then, as shown in FIG. 3, the resin cassette coil 12 is disposed on the teeth 18 of the core 10. In the example shown in FIG. 3, the resin cassette coils 12 are respectively arranged on the 15 teeth 18 formed on the core 10. However, the number of the teeth 18 and the number of the resin cassette coils 12 of the core 10 can be appropriately changed. .

  Next, the resin ring 16 is joined to the outer peripheral surface of the coil group, that is, the outer peripheral surface 42 of the resin cassette coil 12, at the lead side coil end 26 and the counter lead side coil end 28 of the resin cassette coil 12. As a joining method, ultrasonic friction welding is performed by bringing the inner peripheral surface 44 of the resin ring 16 into contact with the outer peripheral surface 42 of the resin cassette coil 12, or the resin ring 16 is attached to the outer peripheral surface 42 of the resin cassette coil 12 by heat caulking. It is conceivable to join the two. In this manner, a coil group including a plurality of resin cassette coils 12 is fixed to the core 10. Here, ultrasonic friction welding is a method in which the inner peripheral surface 44 of the resin ring 16 is brought into contact with the outer peripheral surface 42 of the resin cassette coil 12 and then ultrasonic vibration is applied to the resin ring 16 to perform friction welding. It should be noted that the necessary strength can be ensured by adjusting the thickness of the resin ring 16.

  Next, the shaft 32 provided on the lead side coil end 26 of the resin cassette coil 12 is inserted into the hole 38 of the bus bar module 14, and the bus bar module 14 is joined to the lead side coil end 26 of the resin cassette coil 12. Specifically, the lower surface 40 of the bus bar module 14 is brought into contact with the surface 30 of the lead side coil end 26 of the resin cassette coil 12, and ultrasonic vibration is applied from the upper surface 46 of the bus bar module 14 to perform ultrasonic friction welding. As a result, the bus bar module 14 is joined to the lead-side coil end 26 of the resin cassette coil 12.

  Also, the tip of the shaft 32 inserted into the hole 38 is crushed. At this time, the required strength can be ensured by adjusting the thickness of the shaft 32. Here, fifteen shafts 32 of the resin cassette coil 12 are provided at equal intervals over the entire circumference of the core 10, but at least three or more shafts may be provided if sufficient strength can be ensured. As described above, the stator 1 is manufactured by fixing the coil group including the plurality of resin cassette coils 12 to the core 10.

[Modification]
In the example shown in FIGS. 1 and 3, a polygonal (regular 15-sided) resin ring 16 is used to correspond to 15 resin cassette coils 12, but the present invention is not limited to this, and FIGS. A stator 1B using a circular resin ring 48 as shown in FIG. In the stator 1B, the outer peripheral surface 42 of the resin cassette coil 12 is formed in a circumferential shape, and the inner peripheral surface 49 of the resin ring 48 is attached to the resin cassette coil 12 by welding (ultrasonic friction welding or rotary friction welding) or heat caulking. Bonded to the outer peripheral surface 42. Thereby, the coil group consisting of the plurality of resin cassette coils 12 is fixed to the core 10. In the rotational friction welding, after the inner peripheral surface 49 of the resin ring 48 is brought into contact with the outer peripheral surface 42 of the resin cassette coil 12, the resin ring 48 is relatively moved with respect to the coil group including the plurality of resin cassette coils 12. This is a method of rotating and friction welding.

  Further, only the bus bar module 15 may be joined to the lead-side coil end 26 of the resin cassette coil 12 as in the stator 1C shown in FIG. As shown in FIG. 8, the stator 1 </ b> C has the lower surface 40 of the bus bar module 15 welded and joined to the surface 30 of the lead-side coil end 26 of the resin cassette coil 12, and the outer periphery of the lead-side coil end 26 of the resin cassette coil 12. The inner peripheral surface 50 of the bus bar module 15 is welded and joined to the surface 42, and the resin ring 16 is joined to the outer peripheral surface 42 of the non-lead side coil end 28 of the resin cassette coil 12 by welding or heat caulking, thereby A coil group including the resin cassette coil 12 is fixed to the core 10.

  Further, as shown in FIGS. 9 and 10, a stator 1 </ b> D using an insulator winding coil 52 instead of the resin cassette coil 12 is also conceivable. As shown in FIGS. 11 and 12, the insulator winding coil 52 is formed by winding the coil 20 around an insulator 54. The insulator 54 has insulating properties and is made of an inexpensive thermoplastic resin (for example, PPS (polyphenylene sulfide), LCP (liquid crystal polymer), or PA (polyamide)). If the use environment temperature is low, the insulator 54 may be formed of a thermoplastic resin such as PBT (polybutylene terephthalate), PET (polyethylene terephthalate), or SPS (syndiotactic polystyrene).

  As shown in FIGS. 9 and 10, the stator 1D is formed by welding and joining the inner peripheral surface 50 of the bus bar module 59 to the outer peripheral surface 60 of the lead-side coil end 26 of the insulator winding coil 52. The resin ring 16 is joined to the outer peripheral surface 60 of the non-lead-side coil end 28 of 52 by welding or heat caulking, so that a coil group including a plurality of insulator winding coils 52 is fixed to the core 10. In addition, as positioning of the core 10 and the bus bar module 59 about the circumferential direction of the core 10, as shown in FIG. 9 and FIG. 10, it protruded in the direction where the core 10 is arrange | positioned in two places of the outer peripheral part of the bus bar module 59. A positioning portion 62 having a protruding portion is provided, and the protruding portion of the positioning portion 62 is inserted into the hole 63 of the core 10. Note that two or more positioning portions 62 and holes 63 may be provided.

  Further, as shown in FIGS. 13 and 14, a stator 1 </ b> E using an insulator winding coil 68 having a flange instead of the resin cassette coil 12 is also conceivable. As shown in FIGS. 15 and 16, the insulator winding coil 68 is formed by winding the coil 20 around an insulator 66 having a flange portion 64.

  Then, as shown in FIGS. 13 and 14, the stator 1E is formed by welding and joining the inner peripheral surface 50 of the bus bar module 59 to the outer peripheral surface 80 of the lead-side coil end 26 of the insulator winding coil 68. The resin ring 16 is joined to the outer peripheral surface 80 of the anti-lead-side coil end 28 of 68 by welding or heat caulking, so that a coil group including a plurality of insulator winding coils 68 is fixed to the core 10.

[Effect of Example 1]
According to the first embodiment as described above, the outer peripheral surface of the coil group, that is, various coils (generic name for the resin cassette coil 12 and the insulator winding coils 52 and 68) is obtained by welding or heat caulking the resin ring 16 made of thermoplastic resin. The coil group is fixed to the core 10 by bonding to the outer peripheral surfaces 42, 60, and 80. Therefore, parts such as the collar member in Patent Document 1 are not necessary, and the manufacturing cost can be reduced. Moreover, since the management cost and material cost after joining can be significantly reduced as compared with the case where the core 10 and the coil group are joined with an adhesive as in the prior art, the manufacturing cost can be reduced. . Further, when the motor is cooled by, for example, ATF, it is not necessary to take measures for dissolving the adhesive.

  In addition, by assuring the quality of each coil and each bus bar module (generic name for the bus bar modules 14, 15, 59), inspection items after the stators 1A to 1E are assembled (for example, insulation inspection between coils) are provided. Decrease significantly. Therefore, the burden of the inspection work of the stators 1A to 1E can be reduced.

  In addition, the stators 1A to 1E can reduce the amount of resin used and can be reduced in weight as compared with a stator in which a coil is fixed to a core by sealing with a resin as in the past. The cooling performance against the heat generation of the motor is improved.

  Moreover, since the joining of various coils and the core 10 and the joining of various coils and the various bus bar modules can be performed at the same time, the manufacturing time of the stators 1A to 1E can be shortened.

  Further, since the resin ring 16 is joined to the outer peripheral surfaces 42, 60, 80 of the various coils, welding or heat caulking can be performed from the outside of the outer peripheral surfaces 42, 60, 80, facilitating the joining operation. Can be achieved.

  Further, since polyphenylene sulfide, a liquid crystal polymer, or polyamide, which is an inexpensive material, is used as the thermoplastic resin, the manufacturing cost can be reduced by suppressing the material cost.

<Example 2>
Next, Example 2 will be described. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different points are mainly described. As shown in FIG. 18, the stator 2A of the second embodiment shown in FIG. 17 has an inner peripheral surface of the coil group, that is, a resin cassette at both the lead side coil end 26 and the anti-lead side coil end 28 of the resin cassette coil 12. The outer peripheral surface 74 of the polygonal resin ring 72 is joined to the inner peripheral surface 70 of the coil 12 by welding or heat caulking, whereby the coil group including the plurality of resin cassette coils 12 is fixed to the core 10.

  In FIGS. 17 and 18, the resin ring 72 has a polygonal (regular 15-sided) shape to correspond to the 15 resin cassette coils 12, but the shape of the resin ring is not limited to this. For example, as shown in FIG. 19 and FIG. 20, the outer peripheral surface 70 of the resin cassette coil 12 has a circular outer shape, and an outer peripheral surface 78 of a circular resin ring 76 is formed on the inner peripheral surface 70 of the resin cassette coil 12. You may join.

  Further, instead of the resin cassette coil 12, insulator winding coils 52 and 68 may be used. For example, a polygonal resin ring 72 may be joined to the inner peripheral surface 84 (see FIG. 12) at both the lead side coil end 26 and the anti-lead side coil end 28 of the insulator winding coil 52. Or you may join the polygonal resin ring 72 to the internal peripheral surface 82 (refer FIG. 16) in both the lead side coil end 26 and the anti-lead side coil end 28 of the insulator winding coil 68.

  According to the second embodiment as described above, in addition to the effects of the first embodiment, the resin rings 72 and 76 are joined to the inner peripheral surfaces 70, 82, and 84 of various coils. The circumference can be reduced, the material cost can be suppressed, and the manufacturing cost can be reduced.

<Example 3>
Next, Example 3 will be described. In the following description, components equivalent to those in the first embodiment and the second embodiment are denoted by the same reference numerals, description thereof is omitted, and different points are mainly described. As shown in FIGS. 21 and 22, the stator 3 of the third embodiment has an outer peripheral surface and an inner peripheral surface of the coil group on both sides of the lead-side coil end 26 and the anti-lead-side coil end 28 of the resin cassette coil 12. The resin group 16 and the resin ring 72 are joined to both the outer peripheral surface 42 and the inner peripheral surface 70 of the resin cassette coil 12 by welding or heat caulking, respectively, so that a coil group composed of a plurality of resin cassette coils 12 is formed into the core 10. It is fixed to.

  In FIGS. 21 and 22, the resin ring 16 and the resin ring 72 are polygonal (regular 15-sided) shapes to correspond to 15 resin cassette coils 12, but the resin ring shape is Without being limited thereto, the outer peripheral surface 42 and the inner peripheral surface 70 of the resin cassette coil 12 are formed in a circular shape, and a circular resin ring 48 (see FIG. 6) and a resin ring 76 (see FIG. 20) are respectively formed on both surfaces. May be joined. Further, instead of the resin cassette coil 12, insulator winding coils 52 and 68 may be used.

  According to the third embodiment as described above, in addition to the effects of the first and second embodiments, the resin rings 16, 48, 72, and 76 are bonded to both the outer peripheral surface and the inner peripheral surface of various coils. Therefore, the fixed state between the coil group and the core 10 is stabilized.

<Other examples>
In addition to the above-described embodiments, the following embodiments are also conceivable. As an embodiment using the resin cassette coil 12, for example, the bus bar module 15 is joined to the lead side coil end 26 of the resin cassette coil 12, while the inner peripheral surface 70 of the resin cassette coil 12 on the opposite lead side coil end 28 is attached. Polygonal resin ring 72 may be joined.

  Alternatively, a circular resin ring 76 is joined to the inner peripheral surface 70 at the lead side coil end 26 of the resin cassette coil 12, while a circular resin ring 48 is attached to the outer peripheral surface 42 at the counter lead side coil end 28 of the resin cassette coil 12. May be joined.

  Alternatively, a circular resin ring 48 is joined to the outer peripheral surface 42 at the lead side coil end 26 of the resin cassette coil 12, while a circular resin ring 76 is attached to the inner peripheral surface 70 at the counter lead side coil end 28 of the resin cassette coil 12. May be joined.

  As an embodiment in which an insulator winding coil 52 is used instead of the resin cassette coil 12, a circular resin ring 76 is joined to the inner peripheral surface 84 at the lead side coil end 26 of the insulator winding coil 52, while the insulator winding coil is joined. A circular resin ring 48 may be joined to the outer peripheral surface 60 at the non-lead side coil end 28 of 52.

  Alternatively, the bus bar module 59 is joined to the outer peripheral surface 60 of the lead side coil end 26 of the insulator winding coil 52, while the circular resin ring 76 is joined to the inner peripheral surface 84 of the counter lead side coil end 28 of the insulator winding coil 52. May be.

  As an embodiment in which an insulator winding coil 68 having a flange is used instead of the resin cassette coil 12, a circular resin ring 76 is joined to the inner peripheral surface 82 at the lead side coil end 26 of the insulator winding coil 68. Alternatively, a circular resin ring 48 may be joined to the outer peripheral surface 80 at the coil end 28 opposite to the lead of the insulator winding coil 68.

  Alternatively, a circular resin ring 48 is joined to the outer peripheral surface 80 at the lead side coil end 26 of the insulator winding coil 68, while a circular resin ring 76 is attached to the inner peripheral surface 82 at the counter lead side coil end 28 of the insulator winding coil 68. May be joined.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention. For example, the present invention is not limited to the above-described embodiments, and combinations of polygonal and circular resin rings, bus bar modules, and coils can be appropriately and freely performed.

1A Stator 1B Stator 1C Stator 1D Stator 1E Stator 2A Stator 2B Stator 3 Stator 10 Core 12 Resin Cassette Coil 14 Bus Bar Module 15 Bus Bar Module 16 Resin Ring 18 Teeth 20 Coil 22 Resin 26 Lead Side Coil End 28 Opposite Lead side coil end 30 surface 32 shaft 34 bus bar 36 resin 38 hole 42 (resin cassette coil) outer peripheral surface 48 (circular) resin ring 52 insulator winding coil 54 insulator 59 bus bar module 60 (insulator winding coil ) Outer peripheral surface 66 Insulator 68 Insulator winding coil 70 Inner peripheral surface (of resin cassette coil) 72 Resin ring 76 (circular ) Resin ring 80 Outer peripheral surface (of insulator winding coil) 82 Inner peripheral surface (of insulator winding coil) 84 Inner peripheral surface of (insulator winding coil)

Claims (7)

In the method of manufacturing a stator having an annular coil group formed by mounting a plurality of cassette winding coils or coils wound around a resin insulator, with a coil sealed with an insulating resin, on an annular core tooth,
Fixing the coil group to the core by bonding a resin ring made of a thermoplastic resin around the coil group by welding or heat caulking;
A method for manufacturing a stator characterized by the above. In the manufacturing method of the stator of Claim 1,
The coil group includes a lead-side coil end located on an end face on a side connected to a lead wire connected to an external power source in the axial direction of the core, and a side opposite to the axial direction of the core with respect to the lead-side coil end And an anti-lead side coil end located on the end face of
An annular bus bar module in which a bus bar to be connected to the coil is sealed with a thermoplastic resin is joined to the lead side coil end by welding,
Bonding the resin ring to at least one of the lead-side coil end and the anti-lead-side coil end;
A method for manufacturing a stator characterized by the above. In the manufacturing method of the stator of Claim 1 or 2,
The periphery of the coil group is the outer peripheral surface of the coil group;
A method for manufacturing a stator, characterized in that In the manufacturing method of the stator of Claim 1 or 2,
The periphery of the coil group is an inner peripheral surface of the coil group;
A method for manufacturing a stator characterized by the above. In the manufacturing method of the stator of Claim 1 or 2,
The periphery of the coil group is an outer peripheral surface and an inner peripheral surface of the coil group;
A method for manufacturing a stator characterized by the above. In the manufacturing method of the stator according to any one of claims 1 to 5,
The thermoplastic resin is polyphenylene sulfide, liquid crystal polymer or polyamide;
A method for manufacturing a stator characterized by the above. In a stator having an annular coil group formed by mounting a plurality of cassette winding coils or coils wound around a resin insulator, with a coil sealed with an insulating resin, on an annular core tooth,
Fixing the coil group to the core by bonding a resin ring made of a thermoplastic resin around the coil group by welding or heat caulking;
Stator characterized by.

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