JP2019115178A - Stator and manufacturing method thereof - Google Patents

Abstract

To provide a stator capable of securing the fixing strength between a coil end portion and a placement member even when the placement member is disposed in the coil end portion.SOLUTION: A stator 100 includes a stator core 10 including a plurality of slots 11, a plurality of coils 30 each including a pair of slot accommodating portions 32 accommodated in different slots 11 and a coil end portion 33 connecting the slot accommodating portions 32 and projecting from an end face 10a in the axial direction of the stator core 10, a bus bar member 50 disposed on the opposite side of the coil end portion 33 to the stator core 10 side in the axial direction, and an adhesive holding member 60 provided between the coil end portion 33 and the bus bar member 50 and configured to be able to be held in a state in which an adhesive 61 penetrates.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a stator and a method of manufacturing the stator.

  BACKGROUND Conventionally, a stator including an arranging member and a method of manufacturing the stator are known (see, for example, Patent Document 1).

  Patent Document 1 discloses a stator provided with a terminal module for a rotary electric machine (hereinafter referred to as "module"). The stator is provided with a stator core and a stator coil having a plurality of segment coils. The coil end constituting one end of the segment coil is disposed axially outside the stator core. The module includes a main body portion formed of an insulator, a bus bar provided inside the main body portion, and a plurality of end portions. Also, the module is disposed axially opposite to the stator core of the coil end. The end of the module and the coil end are joined by welding.

JP, 2013-115910, A

  However, in the stator described in Patent Document 1, since the module is fixed only by the end (terminal) of the module welded to the coil end, the module is welded when vibration or impact is applied to the stator. It is considered that stress concentrates on the part (terminal). In this case, it is considered not easy to secure the mechanical strength of the welded portion of the module. Therefore, in the stator described in Patent Document 1, when arranging the module (arrangement member) at the coil end (coil end portion), it is not easy to secure the fixing strength between the coil end portion and the arrangement member. There is a problem.

  The present invention has been made to solve the problems as described above, and one object of the present invention is to fix the coil end portion and the arranging member even when arranging the arranging member at the coil end portion. It is an object of the present invention to provide a stator and a method of manufacturing the stator capable of securing strength.

  In order to achieve the above object, a stator according to a first aspect of the present invention connects a stator core including a plurality of slots, a pair of slot accommodating portions accommodated in different slots, and a pair of slot accommodating portions. And a plurality of coils each including a coil end portion projecting from an end face of the stator core in the axial direction, an arranging member arranged on the opposite side of the coil end to the stator core side in the axial direction, a coil end portion and the arranging member And an adhesive holding member configured to be capable of holding the adhesive in a state in which the adhesive is penetrated.

  In the stator according to the first aspect of the present invention, as described above, the adhesive holding member configured to be able to hold the adhesive in a state where the adhesive is infiltrated between the coil end portion and the disposition member Set up. As a result, since the coil end portion and the placement member are directly fixed by the adhesive held by the adhesive holding portion, the coil end portion and the placement member are joined by a bonding method different from bonding by the adhesive. It is possible to disperse (decrease) the stress generated in a joint (for example, a weld) which is a part. As a result, it is possible to prevent the stress generated at the joint from becoming excessive, and therefore, even when the placement member is disposed at the coil end, the fixing strength between the coil end and the placement member can be secured. . Further, since the adhesive penetrates (is held) in the adhesive holding member, the adhesive does not flow out of the adhesive holding member, or the adhesive flows out of the adhesive holding member. Even the outflow is small. Thereby, the coil end portion and the placement member can be fixed with sufficient strength by the adhesive held by the adhesive holding member.

  According to a method of manufacturing a stator in a second aspect of the present invention, a pair of slot accommodating portions accommodated in different slots and a pair of slot accommodating portions are connected to slots of a stator core including a plurality of slots Disposing a plurality of coils each including a coil end portion projecting from an end face in the axial direction; disposing a disposition member on the side opposite to the stator core side of the coil end portion in the axial direction; The step of disposing an adhesive holding member configured to be able to be held by causing the adhesive to penetrate on the side opposite to the stator core side in the axial direction, the step of holding the adhesive in the adhesive holding member, and the adhesive Curing the adhesive held by the holding member.

  In the method of manufacturing the stator according to the second aspect of the present invention, as described above, the adhesive configured to be able to be held by infiltrating the adhesive on the side opposite to the stator core side in the axial direction of the coil end portion. The method includes the steps of disposing a holding member, holding the adhesive in the adhesive holding member, and curing the adhesive held in the adhesive holding member. As a result, since the coil end portion and the placement member are directly fixed by the adhesive held by the adhesive holding portion, the coil end portion and the placement member are joined by a bonding method different from bonding by the adhesive. It is possible to disperse (decrease) the stress generated in the joint (for example, weld) that is a part. As a result, it is possible to prevent the stress generated at the joint from becoming excessive, and therefore, even when the placement member is disposed at the coil end, the fixing strength between the coil end and the placement member can be secured. . Further, since the adhesive penetrates (is held) in the adhesive holding member, the adhesive does not flow out of the adhesive holding member, or the adhesive flows out of the adhesive holding member. Even the outflow is small. Accordingly, it is possible to provide a method of manufacturing a stator in which the coil end portion and the placement member can be fixed with sufficient strength by the adhesive held by the adhesive holding member.

  According to the present invention, as described above, even when the placement member is disposed in the coil end portion, the fixing strength between the coil end portion and the placement member can be secured.

It is a top view of the stator by a 1st embodiment. It is a perspective view of the stator by a 1st embodiment. It is a perspective view of the coil by a 1st embodiment. It is a figure which shows the adhesive agent holding member arrange | positioned between a bus-bar member and a coil end part. It is a figure (enlarged view) showing an adhesive agent retention member arranged between a bus bar member and a coil end part. It is a figure which shows the state in which the bus-bar member and the coil were connected. It is a top view of the bus bar member by a 1st embodiment. It is a flowchart for demonstrating the manufacturing method of the stator by 1st Embodiment. It is a perspective view of a coil assembly. It is a figure which shows the state by which the adhesive agent holding member is arrange | positioned on a coil end part. It is a flowchart for demonstrating the manufacturing method of the stator by 2nd Embodiment. It is a figure which shows the process of making an adhesive holding member penetrate. It is a figure which shows the state by which the adhesive agent holding member is arrange | positioned on a coil end part. It is a figure which shows the adhesive agent holding member arrange | positioned between the bus-bar member and coil end part by 2nd Embodiment. It is a perspective view of the bus-bar member by a modification.

  Hereinafter, embodiments of the present invention will be described based on the drawings.

Configuration of First Embodiment
(Structure of the stator)
The structure of the stator 100 according to the first embodiment will be described with reference to FIGS. 1 to 10.

  In the specification of the application, the “axial direction” means a direction (see FIG. 1) along the rotation axis (symbol O) (the Z direction) of the stator core 10. Further, “circumferential direction” means the circumferential direction (direction A) of the stator core 10. The “radially inner side” and the “inner diameter side” mean the direction (arrow B1 direction) toward the center of the stator core 10. Further, the “radially outer side” and the “outer diameter side” mean the direction toward the outside of the stator core 10 (the arrow B2 direction).

  Further, as shown in FIG. 1, the stator 100 is provided with an annular stator core 10. For example, the stator 100 constitutes a part of an inner rotor type rotating electrical machine, and the stator core 10 is disposed to face the rotor core 20 in the radial direction.

(Configuration of stator core)
The stator core 10 is provided with a plurality of (for example, 96) slots 11. A coil 30 is disposed in each of the plurality of slots 11. The slot 11 is configured, for example, as an open slot. That is, in the circumferential direction, the width of the slot 11 is substantially constant along the radial direction. Thus, the slot 11 is configured such that the coil 30 can be inserted from the inside in the radial direction.

  As shown in FIGS. 1 and 2, the stator core 10 is provided between the back yoke 12 that annularly connects the radially outer side of the slots 11 and the adjacent slots 11, and extends radially inward from the back yoke 12. And a plurality of teeth 13 extending. Further, an insulating member 14 for insulating the coil 30 and the stator core 10 is disposed in the slot 11.

(Configuration of coil)
As shown in FIG. 3, the stator 100 includes a plurality of (e.g., 96) coils 30. Note that FIG. 3 shows a representative shape of the plurality of coils 30. The coil 30 is formed of, for example, a flat wire 31. The coil 30 is configured, for example, as a cassette coil having a substantially hexagonal shape in which the flat wire 31 is wound concentrically a plurality of times, and the slot accommodating portions 32 of two coils 30 have a diameter per one slot 11. It is arranged to overlap in the direction. In the specification of the present application, the "flat wire" means a wire having a substantially rectangular cross-sectional shape as a unit. That is, "flat wire" is described as a concept including not only one formed by one conductor wire but also one formed into a flat angle in a state where a plurality of conductor wires are bundled. The rectangular conductor 31 is an example of the “conductor” in the claims.

  In detail, each of the plurality of coils 30 includes a pair of slot accommodating portions 32 accommodated in different slots 11 and a coil end portion 33 connecting the pair of slot accommodating portions 32 with each other. Further, the coil end portion 33 is configured to project from an end face 10 a (see FIG. 1) in the axial direction of the stator core 10. In addition, the coil 30 includes the one end 31 a of the concentrically wound flat wire 31 and is coaxially wound with the inner side lead wire portion 34 which is formed to extend from the radial inner side to the radial outer side of the stator core 10. And the outer diameter side lead wire portion 35 disposed on the outer diameter side of the stator core 10.

  Further, as shown in FIG. 2, the one end 31a and the other end 31b extend along the radial direction. Then, one end 31 a of the inner diameter side lead wire portion 34 of one of the plurality of coils 30 and the other end 31 b of the other coil 30 of the plurality of coils 30 are welded It joins more and comprises the welding part 40. FIG. In detail, the coil 30 is electrically conductively joined by joining in a state in which the coating of one end 31 a and the other end 31 b is peeled off. Moreover, the welding part 40 is joined in the state which the one end part 31a and the other end part 31b overlap in an axial direction.

  Further, as shown in FIGS. 1 and 2, the bus bar member 50 is disposed on the side (Z1 direction side) opposite to the stator core 10 side of the coil end portion 33 in the axial direction. As shown in FIGS. 4 and 5, the bus bar member 50 is disposed on the Z1 direction side of the coil end portion 33 in a state of being separated from the coil end portion 33 in the axial direction (a state of leaving a predetermined distance D). There is. The height positions of the plurality of coil end portions 33 in the axial direction may have variations due to manufacturing errors (variations in dimensions) of the coils 30 or the like. That is, the predetermined interval D is not constant, and may differ depending on the coil 30. The bus bar member 50 is an example of the “arrangement member” in the claims.

  As shown in FIG. 6, the bus bar member 50 is connected to one end 31 a or the other end 31 b of the coil 30. Specifically, the terminal portion 51 of the bus bar member 50 and the one end 31a or the other end 31b of the coil 30 are welded in the state of overlapping in the axial direction. The terminal portion 51 of the bus bar member 50 is bent at an angle of about 90 degrees from the side surface of the bus bar member 50 toward the Z2 direction, and further bent at an angle of about 90 degrees toward the radially outer side. Further, one end 31a or the other end 31b of the coil 30 is bent radially outward. The terminal portion 51 of the bus bar member 50 and the one end 31a or the other end 31b of the coil 30, which are provided so as to extend in the radial direction, are welded (joined). The terminal portion 51 of the bus bar member 50 and the one end 31 a or the other end 31 b of the coil 30 may be joined by a method other than welding. Further, the terminal portion 51 of the bus bar member 50 and the one end 31 a or the other end 31 b of the coil 30 are joined in an electrically conductive state.

  A plurality of terminal portions 51 of the bus bar member 50 are provided, and the plurality of terminal portions 51 and the plurality of one end portions 31a (or the plurality of other end portions 31b) of the coil 30 are joined. Further, the bus bar member 50 has an arc shape so as to follow the shape of the annular stator core 10.

  Further, as shown in FIG. 7, the bus bar member 50 is a three-phase terminal bus bar for supplying power to the coil 30. Bus bar member 50 (three-phase terminal bus bar) electrically connects three terminal portions 52 to which three-phase (U-phase, V-phase and W-phase) AC power is input, and terminal portions 52 and coil 30. A bus bar main body portion 53 is provided. The outer surface of bus bar member 50 is coated with insulation. Further, two of the three-phase bus bar main body portions 53 are arranged to overlap with each other along the axial direction. Further, the remaining one of the three-phase bus bar main body portion 53 is arranged in a state of being radially shifted with respect to the other two bus bar main body portions 53. Thus, a clearance C is provided between the two bus bar main body portions 53 overlapping along the axial direction and the remaining one bus bar main body portion 53. Thereby, the adhesive agent holding member 60 mentioned later is exposed from the clearance C.

  Here, in the first embodiment, as shown in FIG. 4 and FIG. 5, the adhesive 61 is configured to be able to be held in a state in which the adhesive 61 penetrates between the coil end portion 33 and the bus bar member 50. An agent holding member 60 is provided. Specifically, the adhesive holding member 60 has a mesh-like structure through which the adhesive 61 can penetrate. Further, the adhesive holding member 60 is configured to be able to hold the adhesive 61 in a state in which the adhesive 61 is infiltrated, and is flexible before the adhesive 61 infiltrated into the adhesive holding member 60 is cured. Have. For example, the adhesive holding member 60 is made of polyphenylene sulfide resin (PPS: Poly Phenylene Sulfide Resin). PPS is excellent in heat resistance, and can withstand the heat generation of the coil 30 due to the current flow. In addition, PPS has elasticity and relatively high mechanical strength. Further, PPS is formed by knitting monofilament PPS and multifilament PPS. Here, a monofilament is a yarn in which one chemical fiber is used as a single fiber as it is. Moreover, a multifilament is what combined many filaments of chemical fiber and was made into yarn.

  When the PPS is sheet-like, by folding the sheet-like PPS, between the coil end portion 33 and the bus bar member 50 in a state where the folded PPS (adhesive holding member 60) has a predetermined thickness Be placed. The adhesive 61 penetrates the inside of the adhesive holding member 60 by capillary action.

  In the first embodiment, the bus bar member 50 and the coil end portion 33 are fixed by the adhesive 61 held by the adhesive holding member 60. That is, when the adhesive 61 which has permeated into the adhesive holding member 60 exudes to the bus bar member 50 side and the coil end portion 33 side, the bus bar member 50 and the coil end portion 33 are directly fixed by the adhesive 61. .

  Further, as shown in FIG. 7, in plan view, the adhesive holding member 60 is provided to cover substantially the entire area of the lower surface of the bus bar member 50. Thereby, the substantially entire area of the lower surface of the bus bar main body portion 53 is fixed to the coil end portion 33 by the adhesive 61.

  Further, in the first embodiment, as shown in FIGS. 4 and 5, the adhesive holding member 60 is provided between the coil end portion 33 and the bus bar member 50 in both the coil end portion 33 and the bus bar member 50. It is provided in contact. Specifically, the surface on the Z1 direction side of the adhesive holding member 60 contacts the bus bar member 50, and the surface on the Z2 direction side of the adhesive holding member 60 contacts the coil end portion 33. As described above, the height position of each of the plurality of coil end portions 33 may have variations due to manufacturing errors (variations in dimensions) of the coils 30 or the like. However, since the adhesive holding member 60 has flexibility before the adhesive 61 which has penetrated the adhesive holding member 60 is cured, the adhesive holding member 60 is also provided with variations in the height position of the coil end portion 33. 60 contacts (closely contacts) both the coil end portion 33 and the bus bar member 50. That is, the gap between the coil end portion 33 and the bus bar member 50 is filled with the adhesive holding member 60. The thickness t of the adhesive holding member 60 before being disposed between the coil end portion 33 and the bus bar member 50 is equal to or larger than the distance D between the bus bar member 50 and the coil end portion 33.

  As shown in FIG. 5, the flat wire 31 constituting the coil 30 is fixed by a varnish 70. Moreover, the varnish 70 has insulation. Moreover, the varnish 70 is a varnish 70 having a thermosetting property. And in 1st Embodiment, the adhesive agent 61 hold | maintained at the adhesive agent holding member 60 has the curing temperature contained in the curing temperature width | variety which the varnish 70 cures. Specifically, the adhesive 61 is made of the same varnish 70 as the varnish 70 for fixing the flat wire 31 together. Then, the adhesive 61 (varnish 70) held by the adhesive holding member 60 is thermally cured, whereby the bus bar member 50 and the coil end portion 33 are fixed, and the rectangular conductive wires 31 are fixed to each other.

(Method of manufacturing stator)
Next, a method of manufacturing the stator 100 will be described.

<Step of Forming a Coil Assembly>
First, as shown in FIG. 8, in step S1, a coil assembly 80 (see FIG. 9) in which a plurality of coils 30 are annularly arranged is formed. Specifically, the plurality of coils 30 are disposed adjacent to each other in the circumferential direction while being shifted by the pitch of the slots 11.

<Step of Inserting Slot Housing into Slot>
Next, in step S2, in a state where the coil assembly 80 is disposed in the inner diameter side space of the stator core 10, the plurality of coils 30 forming the coil assembly 80 are pushed from the inner diameter side to the outer diameter side. The slot accommodating portion 32 is inserted into the slot 11 of the stator core 10. In the slot 11, an insulating member 14 for insulating the coil 30 and the stator core 10 is disposed in advance. Further, the insulating member 14 may be attached in advance to the slot accommodating portion 32 of the coil 30 before being inserted into the slot 11. Further, when the coil 30 is inserted into the slot 11, the contact between the coil 30 and the teeth 13 (insulation member 14) is suppressed by a guide jig (not shown).

<Step of arranging adhesive holding member>
Next, in the first embodiment, in step S3, as shown in FIG. 10, the adhesive holding member 60 having flexibility is placed on the side opposite to the stator core 10 side in the axial direction of the coil end portion 33 (Z1 direction side Place in). Since the adhesive 61 does not penetrate and cure in the adhesive holding member 60 when the adhesive holding member 60 is disposed, the adhesive holding member 60 is in a state of being flexible.

<Step of arranging bus bar members>
Next, in step S4, the bus bar member 50 is disposed on the side (Z1 direction side) opposite to the stator core 10 side of the coil end portion 33 in the axial direction. Specifically, the bus bar member 50 is disposed on the Z1 direction side of the coil end portion 33 so as to sandwich the adhesive holding member 60. Here, since the adhesive holding member 60 has flexibility, the adhesive holding member 60 is deformed to a shape along the upper side of the coil end portion 33 and the lower surface of the bus bar member 50. Thus, the adhesive holding member 60 contacts the upper side of the coil end portion 33 and the lower surface of the bus bar member 50.

<Welding process>
Next, in step S5, in the plurality of coils 30 disposed in the slot 11, the one end 31a and the other end 31b are welded. Also, the terminal portion 51 of the bus bar member 50 and the one end 31 a or the other end 31 b of the coil 30 are welded.

<Preheating process>
Next, in step S6, the stator core 10 and the coil 30 are preheated. As a result, it becomes possible to allow the varnish 70 described later to penetrate smoothly between the flat wire 31 constituting the coil 30.

<Step of Holding Adhesive (Varnish Dropping Step)>
Next, in step S7, as shown in FIG. 5, the varnish 70 is dropped between the flat wire 31 forming the coil 30. Here, in the first embodiment, the adhesive holding member 60 is made to have the same varnish 70 (adhesive 61) as the varnish 70 dropped between the flat wire 31 constituting the coil 30. Specifically, the varnish 70 is dropped from the nozzle 90 (see FIG. 2) to the coil 30 disposed in the stator core 10. For example, when stator core 10 is arranged such that the axial direction of stator core 10 is along the Z direction (in the case of flat placement), varnish 70 (adhesive 61) is dropped in gap C of bus bar member 50. Since the adhesive agent holding member 60 is exposed from the gap C, the varnish 70 (adhesive agent 61) is dropped directly on the adhesive agent holding member 60. As a result, the varnish 70 (the adhesive 61) penetrates the entire adhesive holding member 60 by capillary action, and the adhesive 61 is held by the adhesive holding member 60.

  In addition, stator core 10 and nozzle 90 move (rotate) relatively along the circumferential direction. Thereby, the varnish 70 (adhesive 61) is dropped while the nozzle 90 moves relative to the adhesive holding member 60 along the circumferential direction. Furthermore, the varnish 70 is dropped directly on the coil end portion 33 in the area where the adhesive holding member 60 is not disposed. Then, the varnish 70 penetrates between the flat wire 31 of the coil 30 and between the coil 30 and the slot 11 (insulation member 14). The dropping process of the varnish 70 is a process performed also in the normal stator 100 in which the adhesive holding member 60 is not provided. Furthermore, the disposition attitude of the stator core 10 is also the same as the process in the normal stator 100 in which the adhesive holding member 60 is not provided.

<Step of heat curing varnish>
Next, in step S8, the varnish 70 (adhesive 61) permeating the adhesive holding member 60 is cured together with the varnish 70 dropped between the flat wire 31 constituting the coil 30. Specifically, by heating stator core 10 and coil 30, adhesive 61 held in adhesive holding member 60, between flat wire 31 and between coil 30 and slot 11 (insulation member 14) And the varnish 70 which has penetrated. That is, the adhesive 61 held by the adhesive holding member 60 and the varnish 70 permeating between the flat wire 31 and between the coil 30 and the slot 11 (insulating member 14) are obtained in one step. Cure at the same time. Here, in the first embodiment, the adhesive 61 is cured by the curing temperature included in the curing temperature width at which the varnish 70 for fixing the flat wire 31 constituting the coil 30 is cured. Thereby, the stator 100 is completed.

Configuration of Second Embodiment
(Method of manufacturing stator)
A method of manufacturing the stator 200 according to the second embodiment will be described with reference to FIGS. 11 to 14. In the second embodiment, the adhesive holding member 260 is disposed in the coil end portion 33 in a state where the adhesive 261 is held in advance by the adhesive holding member 260. As shown in FIG. 11, the <step of forming a coil assembly> and <the step of inserting a slot receiving portion into a slot> are the same as in the first embodiment.

<Step of holding adhesive>
Here, in the second embodiment, as shown in FIG. 12 in step S11, before the adhesive holding member 260 is disposed on the side opposite to the stator core 10 side in the axial direction of the coil end portion 33, the adhesive 261 is used. The adhesive 261 is held in advance by the adhesive holding member 260 by infiltrating the The adhesive 261 may be the varnish 70 or an adhesive other than the varnish 70.

<Step of arranging adhesive holding member>
Next, in step S12, as shown in FIG. 13, the adhesive holding member 260 in a state where the adhesive 261 is held is disposed on the side opposite to the stator core 10 side in the axial direction of the coil end portion 33. Since the adhesive 261 is held by the adhesive holding member 260, the adhesive 261 is fixed to the bus bar member 50 and the coil end portion 33 due to the outflow of the adhesive 261 from the adhesive holding member 260. There is no shortage of the adhesive 261.

  Note that, as shown in FIG. 11, <the step of arranging the bus bar member>, the <welding step>, and the <preheating step> are the same as those in the first embodiment.

<Dropping process of varnish>
Next, in step S13, as shown in FIG. 14, the varnish 70 is dropped between the flat wire 31 forming the coil 30. At this time, since the adhesive 261 is held (permeated) in the adhesive holding member 260, the varnish 70 is mainly used between the flat wire 31 and between the coil 30 and the slot 11 (insulation member 14). To penetrate.

  In addition, as shown in FIG. 11, <the step of thermosetting the varnish after the step of dropping the varnish> is the same as that of the first embodiment. Then, the stator 200 is completed.

[Effects of the First and Second Embodiments]
The following effects can be obtained in the first and second embodiments.

  In the first and second embodiments, as described above, the adhesive (61, 261) is infiltrated between the coil end (33) and the placement member (50). , 261) is provided, and the adhesive holding member (60, 260) is provided. As a result, the coil end portion (33) and the placement member (50) are directly fixed by the adhesive (61, 261) held by the adhesive holding member (60, 260). A portion where the terminal portion (51) of the bus bar member (50) and one end (31a) or the other end (31b) of the coil (30) are welded by a joining method different from the joining by (61, 261) ) Can be dispersed (reduced). As a result, it is possible to prevent the stress generated in the joint from becoming excessive, so that the coil end (33) and the arranging member (33) can be arranged even when arranging the arranging member (50) in the coil end (33). 50) can be secured. Also, since the adhesive (61, 261) penetrates (is held) in the adhesive holding member (60, 260), the adhesive (61, 261) from the adhesive holding member (60, 260) Or the adhesive (61, 261) leaks out of the adhesive holding member (60, 260), but the amount of outflow is small. Thereby, the coil end portion (33) and the placement member (50) can be fixed with sufficient strength by the adhesive (61, 261) held by the adhesive holding member (60, 260).

  In the first and second embodiments, as described above, the bus bar member (50) and the coil end portion (33) are adhesive (61) held by the adhesive holding member (60, 260). , 261). According to this structure, the bus bar member (50) is stably disposed on the coil end portion (33) by the adhesive (61, 261) held by the adhesive holding member (60, 260). As a result, the bonding between the bus bar member (50) and the coil end portion (33) can be prevented from being released.

  In the first and second embodiments, as described above, the adhesive holding member (60, 260) has a mesh-like structure through which the adhesive (61, 261) can penetrate. According to this structure, the adhesive (61, 261) is easily permeated into the adhesive holding member (60, 260), and the adhesive (61, 261) is formed on the adhesive holding member (60, 260). It can be held.

  In the first embodiment and the second embodiment, as described above, the adhesive holding member (60, 260) is made of the adhesive (61, 261) in a state where the adhesive (61, 261) is infiltrated. While being comprised so that holding | maintenance is possible, it has a softness | flexibility before the adhesive agent (61, 261) which penetrated the adhesive agent holding member (60, 260) hardens | cures. According to this structure, even when the height positions of the plurality of coil end portions (33) are dispersed, the plurality of coil end portions having different height positions are used as the adhesive holding member (60, 260) having flexibility. Since it can be arranged to be in contact with the upper end portion of (33) and to be in contact with the arranging member (50), the adhesive holding member (with no gap between the arranging member (50) and the coil end portion (33) 60, 260) can be contacted. As a result, the placement member (50) can be fixed on the coil end (33) in a more stable state (more firmly).

  In the first and second embodiments, as described above, the adhesive (61, 261) has a curing temperature that is included in the curing temperature range in which the varnish (70) cures. According to this structure, the adhesive (61, 261) is cured at the same time (by the same process) as the varnish (70) for fixing the conductive wires (31) constituting the coil (30) is cured. Can.

  Further, in the first embodiment and the second embodiment, as described above, the adhesive (61, 261) is the same as the varnish (70) for fixing the conducting wires (31) to each other. According to this structure, the varnish (70) penetrates between the conducting wires (31) constituting the coil (30) (at the same time) and is adhered to the adhesive holding member (60, 260). The agent (61, 261) can be infiltrated. Further, since the varnish (70) for fixing the conductors (31) to each other and the adhesive (61, 261) for fixing the placement member (50) and the coil end portion (33) are the same, the varnish (70) ( Alternatively, no foreign matter is mixed in the adhesive (61, 261).

  Further, in the first and second embodiments, as described above, the adhesive holding member (60, 260) is provided between the coil end portion (33) and the placement member (50), the coil end portion ( 33) provided in contact with both the placement member (50). According to this structure, the adhesive holding member (60, 260) is in contact with both the coil end portion (33) and the placement member (50), so the coil end portion (33) and the placement member (50) Can be fixed in a more stable state (more firmly).

  In the first embodiment, as described above, after the adhesive holding member (60) is disposed on the side opposite to the stator core (10) side in the axial direction of the coil end portion (33), the coil (30) is The same varnish (70) as the varnish (70) to be dropped between the constituent conducting wires (31) is allowed to penetrate the adhesive holding member (60). According to this structure, the adhesive (60) can be used as the adhesive (60) simultaneously with the penetration of the varnish (70) between the conductive wires (31) constituting the coil (30). 61) can penetrate. Thereby, the process (dropping process of a varnish (70)) of hold | maintaining an adhesive agent (61) can be simplified.

  Further, in the first embodiment and the second embodiment, as described above, the adhesive holding member (60, 260) together with the varnish (70) dropped between the conductive wires (31) constituting the coil (30). Cure the varnish (70) that has been infiltrated. According to this structure, since the adhesive (61, 261) can be cured at the same time as the varnish (70) is cured (by the same process), the manufacturing process of the stator (100, 200) is complicated. Can be prevented.

  In the second embodiment, as described above, the adhesive (261) is disposed before the adhesive holding member (260) is disposed on the side opposite to the stator core (10) side in the axial direction of the coil end portion (33). The adhesive holding member (260) holds the adhesive (261) in advance by infiltrating. Then, the adhesive holding member (260) in a state where the adhesive (261) is held is disposed on the side opposite to the stator core (10) side in the axial direction of the coil end portion (33). According to this structure, the adhesive (261) previously permeated into the adhesive holding member (260) exudes between the leads (31), whereby the leads (31) with each other and the coil (30) The slot (11) (insulation member (14)) can be fixed. In addition, after the adhesive holding member (260) is disposed between the coil end portion (33) and the arranging member (50), it is difficult to make the adhesive (261) penetrate the adhesive holding member (260). Even in the case, the adhesive holding member (260) can be easily penetrated with the adhesive (261).

[Modification]
It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is indicated not by the description of the embodiments described above but by the claims, and further includes all modifications (modifications) within the meaning and scope equivalent to the claims.

  For example, in the first and second embodiments, an example is shown in which the coil is configured by a flat wire, but the present invention is not limited to this. For example, the coil may be configured by a round wire (thin wire) other than the flat wire.

  In the first and second embodiments, the bus bar member is disposed on the side (upper side) opposite to the stator core side of the coil end portion. However, the present invention is not limited to this. For example, an insulating member (a protective member for protecting a plurality of coil end portions) covering a plurality of coil end portions may be disposed on the side (upper side) opposite to the stator core side of the coil end portion. In this case, the insulating member (protective member) and the coil end portion are fixed by the adhesive holding member provided between the insulating member (protective member) and the coil end portion.

  Moreover, although the bus-bar member showed the example which is a 3 phase terminal bus-bar for supplying electric power to a coil in the said, 1st and 2nd embodiment, this invention is not limited to this. For example, the bus bar member may be a neutral point bus bar connecting a coil and a neutral point.

  Moreover, although the adhesive agent holding member showed the example which has the network-like structure which an adhesive agent can penetrate in the said, 1st and 2nd embodiment, this invention is not limited to this. For example, the adhesive holding member may be made of an adhesive-permeable sponge or the like (porous material).

  Moreover, although the adhesive agent holding member showed the example comprised from PPS in the said, 1st and 2nd embodiment, this invention is not limited to this. For example, the adhesive holding member may be made of a material capable of holding (penetrating) an adhesive other than PPS.

  In the first and second embodiments, an example is shown in which the varnish is dropped while the stator is placed flat (the axial direction is in the Z direction), but the present invention is not limited thereto. It is not limited. For example, the adhesive holding member disposed between the bus bar member and the coil end portion is disposed in a state where the stator is rotated 90 degrees from the flat state (the axial direction is orthogonal to the Z direction), A varnish may be dropped. Specifically, varnish is dropped from the inner diameter side of the stator core while rotating the stator core.

  In the first and second embodiments, the bus bar members have clearances in the radial direction with respect to the two bus bar main portions overlapping along the axial direction and the two bus bar main portions overlapping along the axial direction. Although the example comprised by one bus-bar main-body part arrange | positioned in the state which was carried out was shown, this invention is not limited to this. For example, as in the bus bar member 350 of the second modification shown in FIG. 15, the three bus bar main body portions 353 of the bus bar member 350 may overlap in the axial direction.

  Moreover, although the adhesive agent holding member showed the example provided so that the substantially whole area of the lower surface of a bus-bar member might be covered in the said, 1st and 2nd embodiment, this invention is not limited to this. For example, the adhesive holding member may partially cover the lower surface of the bus bar main body.

10 stator core 10a end face 11 slot 30 coil 31 flat angle lead (conductor)
31a One end (end)
31b other end (end)
32 slot housing portion 33 coil end portion 50, 350 bus bar member (arrangement member)
61, 261 adhesive 60, 260 adhesive holding member 70 varnish 100, 200 stator

Claims (13)

A stator core including a plurality of slots,
A plurality of coils each including a pair of slot accommodating portions accommodated in the different slots and a coil end portion connecting the pair of slot accommodating portions and projecting from an end face in an axial direction of the stator core;
In the axial direction, a disposition member disposed on the side opposite to the stator core side of the coil end portion;
A stator comprising: an adhesive holding member provided between the coil end portion and the placement member and configured to be capable of holding the adhesive in a state in which the adhesive penetrates. The placement member includes a bus bar member connected to an end of the coil,
The stator according to claim 1, wherein the bus bar member and the coil end portion are fixed by the adhesive held by the adhesive holding member.   The stator according to claim 1, wherein the adhesive holding member has a mesh-like structure through which the adhesive can penetrate.   The adhesive holding member is configured to be able to hold the adhesive in a state in which the adhesive is infiltrated, and has flexibility before the adhesive that has penetrated the adhesive holding member is cured. The stator according to any one of claims 1 to 3. It further comprises a varnish for fixing the conductors constituting the coil,
The stator according to any one of claims 1 to 4, wherein the adhesive includes an adhesive having a curing temperature included in a curing temperature range in which the varnish is cured.   The stator according to claim 5, wherein the adhesive includes the same varnish as the varnish that fixes the conductive wires.   The adhesive holding member is provided between the coil end portion and the disposition member in a state of being in contact with both the coil end portion and the disposition member. The stator described in the section. In the slots of the stator core including a plurality of slots, a pair of slot accommodating portions accommodated in the different slots and a pair of slot accommodating portions are connected to each other, and a coil end portion projecting from an end face in the axial direction of the stator core Placing a plurality of coils, each including
Arranging an arranging member on the side of the coil end portion opposite to the stator core side in the axial direction;
Arranging an adhesive holding member configured to be holdable by causing an adhesive to permeate on the side opposite to the stator core side in the axial direction of the coil end portion;
Holding the adhesive on the adhesive holding member;
Curing the adhesive held by the adhesive holding member.   9. The stator according to claim 8, wherein the step of curing the adhesive is a step of curing the adhesive according to a curing temperature included in a curing temperature range in which varnish for fixing the conductive wires constituting the coil is cured. Production method. The method further comprises the step of dropping the varnish between the conductors constituting the coil,
In the step of holding the adhesive in the adhesive holding member, the adhesive holding member is disposed on the side opposite to the stator core side in the axial direction of the coil end portion, and then the conductive wires constituting the coil are The method according to claim 9, wherein the adhesive holding member is impregnated with the same varnish as the varnish dropped between them.   The step of curing the adhesive is a step of curing the varnish permeating the adhesive holding member together with the varnish dropped between the conductive wires constituting the coil. Stator manufacturing method. In the step of holding the adhesive in the adhesive holding member, the adhesive is caused to permeate before the adhesive holding member is disposed on the side opposite to the stator core side in the axial direction of the coil end portion. A step of holding the adhesive on the adhesive holding member in advance;
The step of arranging the adhesive holding member is a step of arranging the adhesive holding member in a state in which the adhesive is held on the opposite side of the stator core side in the axial direction of the coil end portion. 9. A method of manufacturing a stator according to item 8.   In the step of arranging the adhesive holding member, the adhesive holding member having flexibility before the adhesive that has penetrated the adhesive holding member is cured is the stator core side in the axial direction of the coil end portion The method of manufacturing a stator according to any one of claims 8 to 12, wherein the step of disposing is on the opposite side.

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