JP2017163720A - Stator and wire fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator with which a drawn-around coil wire can be easily housed into a wire holding groove, and with which the drawn-around coil wire surely fixed on the wire holding groove.SOLUTION: A stator includes a stator core formed with a plurality of separated core parts arranged in an annular state. Each of the separated cores includes a separated iron core; an insulator surrounding a part of the separated iron core; a wound coil wire winding around the separated iron core through the insulator; drawn-around coil wires which are both ends of the wound coil wire and drawn and wound by the insulator; and a wire fixture to fix the drawn-around coil wires onto the insulator. The insulator includes at least one wire holding groove to hold a part of the drawn-around coil wire with adjacent two walls. The wire fixture includes at least one insertion part to be inserted between the drawn-around coil wire and one of the two walls.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a stator and a wire fixing tool formed by arranging a plurality of divided core portions in an annular shape.

  2. Description of the Related Art Conventionally, a stator incorporated in a rotating electrical machine has an annular divided core portion having a divided iron core, an insulator surrounding a part of the divided iron core, and a coil conductor wound around the divided iron core via the insulator. Are arranged in a plurality. In addition, a coil conducting wire consists of the winding part coil conducting wire actually wound around a division | segmentation iron core, and the lead part coil conducting wire which is the both ends of a coil conducting wire.

  Patent Document 1 discloses a stator in which a recess (conductor holding groove) is formed along the circumferential direction on the outer periphery of an insulator. The conductor holding groove is for accommodating the lead portion coil conductor and routing it in the circumferential direction of the stator. Convex portions are formed along the depth direction of the conducting wire holding groove on two adjacent wall portions forming the conducting wire holding groove. When the routing portion coil conducting wire is stored in the conducting wire holding groove, the routing portion coil conducting wire is deformed (meandered) by the convex portion, and the coil conducting wire is held on the convex portion by the springback effect.

JP 2012-228152 A

  However, in the stator of Patent Document 1, the convex portion becomes an obstacle when the coil conductor is stored in the conductor holding groove, and the productivity when the stator is assembled is low. Further, when the coil conductor is housed in the conductor holding groove, the coil conductor coating and the projections rub against each other and damage the coating.

  Furthermore, the force due to the springback effect of the coil conductor acts on the wall portion of the conductor holding groove, and the conductor holding groove expands. For this reason, the distance between the walls on the opening side (radially outer side) of the conducting wire holding groove is increased, and the holding force of the coil conducting wire on the opening side is reduced. When the holding force is reduced, the coil conductor is liable to vibrate in the conductor holding groove, which causes wear of the coating film of the coil conductor and dropping of the coil conductor itself from the conductor holding groove. As a result, the coating of the coil conductor is damaged, and ultimately, the insulation failure of the coil conductor is caused.

  The present invention has been made in consideration of such problems, and provides a stator and a wire fixing tool in which a coil conductor can be easily stored in a conductor holding groove and the coil conductor is securely held in the conductor holding groove. The purpose is to do.

  In order to achieve the above object, the first means is a stator including a stator core formed by annularly arranging a plurality of divided core portions, and each divided core portion includes one of a divided iron core and one of the divided iron cores. An insulator that surrounds the winding portion, a wound portion coil conductor wound around the split core via the insulator, a lead portion coil conductor that is both ends of the wound portion coil conductor and is routed by the insulator, A lead wire fixing tool for fixing the lead portion coil lead wire to the insulator, the insulator having at least one lead wire holding groove for holding a part of the lead portion coil lead wire by two adjacent wall portions, and fixing the lead wire. The tool has a configuration in which at least one insertion portion is inserted between the lead-out portion coil lead wire and one of the two wall portions. With such a configuration, when the lead portion coil conductor is stored in the lead wire holding groove, the lead wire holding groove has nothing to obstruct the storing of the lead portion coil lead wire. Can be stored in the conductor holding groove. Then, since the insertion part of a conductor fixing tool is inserted between the routing part coil conductor and the wall part of the conductor holding groove, the routing part coil conductor is pressed against the wall part. Thereby, the lead-out portion coil lead wire is securely fixed to the lead wire holding groove, and vibration and dropping off from the lead wire holding groove are prevented.

  In the second means, in addition to the structure of the first means, the conducting wire holding groove is constituted by one and the other wall portions facing each other, and the conducting wire fixture is provided between the lead-out portion coil conducting wire and the one wall portion. And having the other insertion portion inserted between the lead portion coil conductor and the other wall portion spaced apart in the circumferential direction with respect to the one insertion portion. Is adopted. With such a configuration, the lead-out portion coil conductor meanders in the conductor holding groove. When the lead-out portion coil conductor meanders, a springback effect is generated to return to the original shape, and the lead-out portion coil lead is fixed to the lead wire holding groove.

  In addition to the configuration of the first unit or the second unit, the third unit adopts a configuration in which the thickness of the insertion portion is thicker on the front side than on the back side in the insertion direction of the conductor holding groove. With such a configuration, even if the wall portion constituting the conductor holding groove is deformed and the near side (outside in the radial direction) of the conductor holding groove is expanded, the thickness on the near side of the insertion portion is thick. For this reason, the insertion portion presses the lead portion coil lead wire against the wall portion, and the lead portion coil lead wire is securely fixed to the lead wire holding groove.

  In addition to the configuration of the third means, the fourth means adopts a configuration in which the insertion portion has a tapered shape in the insertion direction into the conductor holding groove. With such a configuration, the thickness of the insertion portion increases toward the outer side in the radial direction, and even when the wall portion deforms and the conductive wire holding groove expands, all the lead portion coil conductive wires are securely fixed.

  In addition to the configuration of any one of the first to fourth means, the fifth means has a plurality of conductor holding grooves, and the conductor fixing tool includes a plate-like fixing body and a plurality of the fixing body. And a plurality of insertion portions extending to the conductive wire holding grooves. With such a configuration, when the lead portion coil conductors are accommodated in the plurality of lead wire holding grooves, all the lead portion coil lead wires can be fixed to the lead wire holding grooves.

  In addition to the structure of any one of the first means to the fifth means, the sixth means has an insulator engaging portion with which the wire fixing tool engages, and the wire fixing tool engages with the insulator engaging portion. The structure which has the conducting wire fixing tool engaging part made is taken. With such a configuration, when the conductor fixing tool is engaged with the insulator, both engaging portions are engaged and are not easily removed. For this reason, even if a vibration generate | occur | produces in a stator, the routing part coil conducting wire is each fixed in a conducting wire holding groove.

  In the seventh means, in addition to the structure of any one of the first means to the sixth means, the lead-out portion coil lead wire is a rectangular wire having a substantially rectangular cross section, and the long side of the substantially rectangular shape is the width direction of the lead wire holding groove. It is configured to be routed to become. With such a configuration, the insertion portion is inserted between one end of the long side of the lead-out portion coil conductor and the wall portion, and the other end of the long side of the lead-out portion coil lead can be pressed against the wall portion.

  The eighth means is a lead wire fixing tool for fixing the lead wire coil conductor of the stator to the lead wire holding groove formed in the insulator by the two wall portions facing each other, and the lead wire fixing tool is routed. The structure which has at least 1 insertion part inserted between a part coil conducting wire and a wall part is taken. With such a configuration, the insertion portion is provided between the lead portion coil lead wire and the wall portion, which engages the lead wire fixing groove with the lead wire holding groove while the lead portion coil lead wire is housed in the lead wire holding groove. Is inserted and the lead coil conductor is securely fixed in the conductor holding groove.

  According to the present invention, the coil conductor can be easily stored in the conductor holding groove, and the coil conductor can be securely fixed to the conductor holding groove.

It is a top view of the stator integrated in the rotary electric machine which concerns on this embodiment. 2A is a view of the electromagnetic steel sheet viewed from the axial direction, FIG. 2B is a view of the insulator viewed from the axial direction, and FIG. 2C is a view of the split core portion viewed from the axial direction. It is. It is the figure which looked at the insulator from the outer peripheral surface side. It is a perspective view which shows a division | segmentation core part and a conducting wire fixing tool. It is a perspective view of a conducting wire fixing tool. FIG. 5 is an explanatory view illustrating a part of a stator in order to explain a state in which a conductor fixing tool is engaged with a split core portion. 7A is a cross-sectional view taken along line AA in FIG. 6, and FIG. 7B is a cross-sectional view taken along line BB in FIG. It is explanatory drawing explaining the clearance gap between a 1st wall part and a coil conducting wire. 9A is a cross-sectional view taken along line CC in FIG. 6, and FIG. 9B is a cross-sectional view taken along line DD in FIG. It is sectional drawing which shows the modification of an insertion part. It is sectional drawing which shows the other modification of an insertion part. It is a figure which shows the insulator with which the conducting wire holding groove is opening toward the axial direction.

  A stator 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the following description, “axial direction A” refers to the direction along the rotation axis of the rotor, “circumferential direction P” refers to the direction along the stator core circumferential surface, and “radial direction R” refers to the radius of the stator core. Each means a direction. The “width” of the conductor holding groove means the distance between two adjacent wall portions.

  FIG. 1 is a view of the stator 1 according to the present embodiment as viewed from the axial direction. The stator 1 constitutes a rotating electrical machine in combination with a rotor 2 (shown in phantom lines) provided therein, and is used as, for example, an electric motor or a generator. The stator 1 of the present embodiment is a three-phase Y-type stator, and forms a neutral point with a hollow holder 3 and three-phase input terminals U, V, W provided on the holder 3. A neutral terminal N and a stator core 7 formed by annularly arranging a plurality (18 in FIG. 1) of divided core portions 5 along the circular wall 3a of the holder 3 are provided.

  Next, the configuration of one divided core unit 5 among the divided core units 5 will be described with reference to FIGS. In addition, the structure of the split core part 5 demonstrated here is the same as the structure of the other split core part 5. FIG. The split core portion 5 includes a split iron core 11 formed by laminating a plurality of substantially T-shaped electromagnetic steel plates 9 punched by a press, an insulator 13 surrounding a part of the split iron core 11, and a winding portion of the insulator 13. It has the winding part coil conducting wire 17a wound by the division | segmentation iron core 9 via 13a. Moreover, the both ends of the winding part coil conducting wire 17a become the lead part coil conducting wire 17b. The winding portion coil conductor 17a and the lead portion coil conductor 17b constitute a single coil conductor 17. The coil conducting wire 17 is a rectangular wire having a long side and a short side, and the cross-sectional shape is a substantially rectangular shape.

  The split core 11 includes a yoke portion 9a extending along the circumferential direction P of the stator core 7 on the outer side in the radial direction R of the stator core 7 and a magnetic pole portion (teeth) extending from the yoke portion 9a toward the inner side of the stator core 7 in the radial direction R. Part) 9b. The outermost peripheral portion of the yoke portion 9 a constitutes the outer peripheral surface of the stator core 7, and the inner end portion in the radial direction R of the magnetic pole portion 9 b is opposed to the rotor 2.

  The insulator 13 is made of an electrically insulating material such as resin. The insulator 13 includes a winding portion 13a around which the winding portion coil conducting wire 17 is wound, and a leading portion coil conducting wire 17b that is both ends (starting end portion or terminating end portion) of the winding portion coil conducting wire 17a. A routing portion 13b for routing the input terminals U, V, W and neutral terminals N of each phase along the circumferential direction P is provided.

  As shown in FIG. 3, the routing portion 13b is arranged in order from one (upper end) to the other (lower end) with respect to the axial direction A, the first wall portion 14a, the second wall portion 14b, and the third wall portion 14c. The fourth wall portion 14d and the fifth wall portion 14e are provided. The first wall portion 14a, the second wall portion 14b, and the third wall portion 14c are separated into two wall portions 14a1 and 14a2, 14b1, and 14b2, and 14c1 and 14c2, which are separated in the circumferential direction P, respectively. However, separating the wall portion is not essential to the present invention. That is, you may comprise all the wall parts by one wall part like the 5th wall part 14e. Each wall part 14a-14e is standingly arranged toward the outer side of radial direction R from the back wall 14f.

[Conducting wire holding groove]
Each of the wall portions 14a to 14e extends substantially in parallel with each other, and between these two wall portions adjacent to each other in the radial direction R, the conductor holding grooves 15a1, 15a2, 15b1, 15b2, 15c1, 15c2, and the like. 15d is formed. As shown in FIG. 7, the conductor holding grooves 15a1 to 15d have a width X1 (width along the axial direction A) and a depth (depth along the radial direction R) that can accommodate the lead wire portion 17b of the flat wire. ). At this time, the coil conductor is routed so that the long side of the routing portion coil conductor 17 is in the width direction of the conductor holding grooves 15a1 to 15d. For this reason, when many routing part coil conducting wires 17b are housed in the conducting wire holding grooves 15a1 to 15d, the long sides of the adjacent routing part coil conducting wires 17b come into contact with each other. In addition, each conducting wire holding groove 15a1-15d is formed in the mutually substantially same width | variety. The widths of the conductor holding grooves 15a1 to 15d are slightly wider than the width of the lead-out portion coil conductor 17b, and are constant over the length direction of the conductor holding grooves 15a1 to 15d. This is because the lead-out portion coil conductor 17b can be easily accommodated in the conductor holding grooves 15a1 to 15d, as will be described later.

  Further, as shown in FIG. 7, among the conductor holding grooves 15a1 to 15d, the depths of the uppermost conductor holding grooves 15a1 and 15a2 (the depth in the radial direction R) are the depths of the other conductor holding grooves 15b1 to 15d. Deeper than that. This is because, unlike the other conductor holding grooves 15b1 to 15d, the conductor holding grooves 15a1 and 15a2 have a role of accommodating a large number of coil conductors 17. Specifically, in order to connect to the neutral terminal N, a maximum of 18 lead coil conductors 17b are accommodated. The lead wire holding grooves 15b1 and 15b2 accommodate U-phase lead portion coil lead wires 17b. The maximum number of U-phase lead-out portion coil conductors 17b is six. The lead wire holding grooves 15c1 and 15c2 accommodate the V-phase lead portion coil lead wires 17b. The V-phase lead-out portion coil lead wires 17b are also six at the maximum. In addition, the lead wire holding groove 15d accommodates a W-phase lead-out portion coil lead wire 17b. The number of the W-phase lead portion coil conductors 17b is six at the maximum. The depths of the conductor holding grooves 15b1 to 15d are substantially the same. FIG. 7 shows only the routing portion 13b of the insulator 13, but actually includes a winding portion.

  An insulator engaging portion 19 is formed on the upper surfaces of the first wall portions 15a1 and 15a2. The insulator engaging portion 19 is for engaging the conductor fixing tool 31 shown in FIG. 4 with the insulator 13. The insulator engaging portion 19 is a protrusion whose height increases from the outside toward the inside in the radial direction R of the stator core 7 (see FIG. 4). The shape of the insulator engaging portion 19 in plan view is a quadrangle. However, the shape of the insulator engaging portion 19 is an example and is not particularly limited. In FIG. 4, the divided iron core 11 is indicated by a virtual line.

[Conductor fixing tool]
Next, the conductor fixing tool 31 will be described. The conducting wire fixture 31 is made of a resin material and may be elastically deformed by a predetermined external force. As shown in FIG. 5, the conductor fixing tool 31 includes a plate-like fixing body 33 and a plurality of insertion portions 35 a 1, 35 a 2, 35 b 1, 35 b 2, 35 c 1, 35 c 2 extending from the fixing body 33 inward in the radial direction R. , 35d1 and 35d2. The fixture main body 33 is slightly curved along the circumferential direction P corresponding to the outer peripheral surface of the stator core 7. Further, at one end of the fixture main body 33 (upper end in the axial direction A), a wire fixture engaging portion 37 is provided. The conducting wire fixture engaging portion 37 is a portion that engages with the insulator engaging portion 19.

  As shown in FIG. 7, the conductor fixing tool engaging portion 37 extends toward the inside in the radial direction R of the stator core 7 along the surfaces of the first wall portions 14 a 1 and 14 a 2 of the insulator 13. A substantially rectangular engagement hole 37 a is formed in the distal end region of the conducting wire fixture engaging portion 37. The engagement hole 37 a is for receiving a protrusion that is the insulator engagement portion 19. For this reason, the dimension of the engagement hole 37 a is larger than the protrusion of the insulator engagement portion 19. In addition, the engagement hole 37a of this embodiment is a through hole. However, it is not essential to form the through hole, and a recess having a recessed bottom surface may be formed corresponding to the insulator engaging portion 19.

  Further, the positions of the insertion portions 35a1 to 35d2 in the axial direction A are set so as to be inserted into the conductor holding grooves 15a1 to 15d. In this embodiment, since the insulator 13 includes four conductor holding grooves 15a1 to 15d, four sets of insertion portions 35a1 to 35d2 are also provided. All of the insertion portions 35a1 to 35d2 in the present embodiment have the same shape. However, an insertion portion having a different shape may be provided. In the present embodiment, two insertion portions that are spaced apart from each other in the circumferential direction P are provided for one conductor holding groove. This is to meander the lead coil conductor 17b in the conductor holding grooves 15a1 to 15d, as will be described later. For this reason, a total of eight insertion portions 35a1 to 35d2 are provided.

  The insertion portions 35a1 to 35d2 are plate-like members having a predetermined thickness. The thickness of the insertion portions 35a1 to 35d2 is thicker on the outer side in the radial direction R and gradually becomes thinner toward the inner side. That is, the insertion portions 35a1 to 35d2 have a tapered shape. In other words, in the state where the conductor fixing tool 31 is engaged with the insulator 13, the thickness of the insertion portions 35a1 to 35d2 is thicker on the near side than the back side in the insertion direction into the conductor holding grooves 15a1 to 15d. Further, in the insertion portions 35a1 to 35d2 of the present embodiment, the upper surface and the lower surface in the axial direction A are predetermined planes. However, it is not essential to form planes on the upper and lower surfaces of the insertion portion. For example, the cross-sectional shape viewed from the radial direction of the insertion portions 35a1 to 35d2 may be a semicircular shape or a semielliptical shape.

  FIG. 6 shows both the wire fixing tool 31 before being engaged with the insulator 13 and the wire fixing tool 31 after being fixed to the insulator 13. As shown in the figure, the wire fixing tool 31 is mounted on the outer peripheral surface of the insulator 13 in such a posture that the wire fixing member engaging portion 37 is inside in the radial direction R. When the conductor fixing tool 31 is attached to the insulator 13, the insulator engaging part 19 enters the engagement hole 37 a of the conductor fixing tool engaging part 37, and the conductor fixing tool 31 is integrated with the insulator 13. In addition, insertion part 35a1-35d2 of the conducting wire fixing tool 31 shown in FIG. However, as shown in FIG. 7, the insertion portions 35a1 and 35b1 may be formed longer than the other insertion portions in accordance with the depth of the conductor holding grooves 15a1 and 15a2.

[Action]
Next, based on FIG. 7, the effect | action of the conducting wire fixing tool 31 is demonstrated. 7A is a cross-sectional view taken along the line AA in FIG. 6, and FIG. 7B is a cross-sectional view taken along the line BB in FIG. In FIG. 7, lead wire coil conductors 17 b are accommodated in the respective conductor holding grooves 15 a 1 to 15 d. The width X2 in the axial direction A of the lead-out portion coil lead wire 17b is narrower than the width of the lead wire holding groove X1. In addition, no convex portions are formed in the conductive wire holding grooves 15a1 to 15d so as to obstruct the housing of the lead portion coil conductive wires 17b. For this reason, the routing portion coil conductor 17b can be easily accommodated in the conductor holding grooves 15a1 to 15d. In addition, the number of the lead part coil conducting wires 17b in each of the illustrated conducting wire holding grooves 15a1 to 15d is an example.

  As shown in FIG. 7A, when the conductor fixing tool 31 is engaged with the insulator 13, the insertion portions 35a1 to 35d1 are inserted into the conductor holding grooves 15a1 to 15d. At this time, the insertion portion 35a1 in FIG. 7A is in the axial direction A so as to be in contact with one (upper) first wall portion 14a1 of the first wall portions 14a1 and 14b1 constituting the conductor holding groove 15a1. The position of is set. In other words, the gap in the axial direction A between the fixture engaging portion 37 and the insertion portion 35a1 is substantially equal to the thickness of the first wall portion 14a1. For this reason, the conducting wire fixture engaging portion 37 and the insertion portion 35a1 are in a positional relationship such that the first wall portion 14a1 is sandwiched therebetween. As a result, the insertion portion 35a1 is inserted between the lead portion coil conductor 17b and the first wall portion. For this reason, the routing portion coil conductor 17b is pressed against the other (lower) second wall portion 14b1 by the insertion portion 35a1. The routing portion coil conductor 17b is pressed against the second wall portion 14b1, so that the routing portion coil lead 17b is securely fixed in the conductor holding groove 15a1.

  Further, the insertion portion 35a1 has a tapered shape with respect to the radial direction R. That is, the thickness of the insertion portion 35a1 is thick on the near side (outside in the radial direction R) in the insertion direction into the conductor holding groove 15a1, and thin on the far side (inside in the radial direction R). For this reason, a large pressing force toward the second wall portion 14b1 is generated in the routing portion coil conducting wire 17b on the outer side in the radial direction R. This has the following special effects.

  That is, when the insertion portion 35a1 is inserted into the conductive wire holding groove 15a1, between the first wall portion 14a1 and the second wall portion 14b1, due to the pressing force as described above, both the wall portions 14a1 and the second wall portion 14a1. A force for separating the wall portions 14b1 from each other is generated. For this reason, the opening side (outside in the radial direction R) of the conductor holding groove 15a1 slightly expands along the axial direction A. At this time, if the insertion portion 35a1 does not have a tapered shape, the force that the outer routing portion coil conductor 17b in the radial direction R is pressed against the second wall portion 14b1 is the inner routing portion coil in the radial direction R. It will become smaller than the force with which the conducting wire 17b is pressed against the second wall portion 14b1. Therefore, the lead-out portion coil lead wire 17b is not sufficiently fixed outside the radial direction R. However, in the present embodiment, since the insertion portion 35a1 has a tapered shape, the thick portion of the insertion portion 35a1 comes into contact with the routing portion coil conductor 17b on the outer side in the radial direction R. The lead-out portion coil lead wire 17b outside the R is also pressed against the other second wall portion 14b1 with a sufficiently large force. The above operation is similarly generated in the other conductor holding grooves 15b1 to 15d.

  On the other hand, in FIG. 7B, the insertion portion 35b2 is in contact with the other (lower) second wall portion 14b2 that forms the conductor holding groove 15a2. For this reason, the insertion part 35a2 is inserted between the routing part coil conducting wire 17b and the second wall part 14b2. In this case, a force that is pressed against the first wall portion 14a2 is applied to the lead portion coil conductor 17b by the insertion portion 35a2. For this reason, the routing part coil conducting wire 17b on the outer side in the radial direction R is fixed by contact between the insertion part 35a2 and the first wall part 14a1. It should be noted that the above-described action is similarly generated in the other conductor holding grooves 15b2 to 15d.

  The above operation will be described in more detail based on FIG. FIG. 8 shows a case where the conductor holding groove 15a1 has a width X1 in the radial direction A and accommodates a lead-out portion coil conductor 17b having a width X2. And the state where the conducting wire holding groove 15a1 is slightly expanded outside in the radial direction R is shown. However, for convenience of explanation, each part is exaggerated. As shown in this figure, there is a gap of Δh1 = X1−X2 between the width X1 of the conductor holding groove 15a1 and the width X2 of the lead-out portion coil conductor 17b. Further, since the first wall portion 14a1 constituting the conducting wire holding groove 15a1 spreads in the axial direction A, the distance between the first wall portion 14a1 and the second wall portion 14b1 outside in the radial direction R is equal to Δh2. Expanding. For this reason, on the outermost side in the radial direction R of the conductor holding groove 15a1, a gap of Δh = Δh1 + Δh2 is formed between the first wall portion 14a1 and the lead portion coil conductor 17b as a whole. However, if the thickness of the insertion portion 35a1 is thicker than the gap Δh, the lead-out portion coil conductor 17b can be reliably fixed in the conductor holding groove 15a1. Assuming that the first wall portion 14a1 or the second wall portion 14b1 is not deformed, the distance between the conductive coil 17 and the first wall portion 14a1 is Δh1. For this reason, if the thickness of the insertion portion 35a1 is greater than the minimum Δh1, the lead portion coil conductor 17b can be fixed to the conductor holding groove 15a1.

  Next, based on FIG. 9A and FIG. 9B, a description will be given of the springback effect when the lead-out portion coil lead wire 17b is housed in the lead wire holding grooves 35a1 to 35d. FIG. 9A is a cross-sectional view of the split core portion 5 taken along the line CC of FIG. 6 and shows a state before the conducting wire fixture 31 is engaged. FIG. 9B is a cross-sectional view of the split core portion 5 taken along the line DD in FIG. 6 and shows a state before the lead wire fixing tool 31 is engaged. As shown in FIG. 9A, before the conductor fixing tool 31 is engaged, the conductor holding grooves 35a1 to 35d are free of obstacles such as convex portions, and the lead portion coil conductor 17b remains linear. It can be accommodated in the conductor holding grooves 35a1 to 35d. For this reason, rubbing between the coating of the lead-out portion coil conductor 17b and each of the wall portions 14a1 to 14e during storage can be prevented. Moreover, the workability | operativity which accommodates the routing part coil conducting wire 17b in conducting wire holding groove 35a1-35d is also good.

  On the other hand, as shown in FIG. 9B, when the insertion portions 35a1 to 35d2 are inserted between the lead portion coil lead wire 17b and the wall portions 14a1 to 14e, the lead portion coil lead wire 17b meanders. This is because the insertion portions (for example, 35a1 and 35b1) that are spaced apart from each other in the circumferential direction P are arranged between the lead portion coil conductor 17b and the first wall portion 14a1 and the lead portion coil lead wire 17b. This is because it is inserted between the two wall portions 14b1 and pushes the lead portion coil conducting wire 17b from above and from below. When the lead-out portion coil lead wire 17b meanders, the lead-out portion coil lead wire 17b tends to return to its original shape, so that the lead-back portion coil lead wire 17b has a springback effect. Due to this spring back effect, the lead-out portion coil lead wire 17b is pressed against the wall portions 14a1 to 14e or the insertion portions 35a1 to 35d2 with a stronger force. Therefore, according to this embodiment, even if vibration generate | occur | produces, it becomes possible to fix the routing part coil conducting wire 17b to conducting wire holding groove 35a1-35d reliably.

[Modification]
Next, based on FIG. 10, the 1st modification of a conducting wire fixing tool is demonstrated. This modification is characterized by the shape of the insertion portion 35B. For this reason, only one insertion part 35B of a conducting wire fixing tool is shown in the figure. As for this insertion part 35B, the surface at the side which contacts the routing part coil conducting wire 17b is stepped. As for the thickness of the insertion portion 35B, the outer thickness is thicker and the inner thickness is thinner in the radial direction R. Even in such a stepped shape, the lead-out portion coil lead wire 17b can be reliably fixed in the lead wire holding groove 15a1. In addition, there are the following effects. That is, in the taper shape as in the above-described embodiment, a force may be applied to the insertion portion 35a1 in the direction of coming out of the lead wire holding groove 15a1 due to contact with the lead portion coil lead wire 17b. However, by adopting a stepped shape, the insertion portion 35B and the lead-out portion coil lead wire 17b are not in contact with each other on the inclined surface, so that the force applied in the direction in which the insertion portion 35B comes out of the lead wire holding groove 15a1 can be reduced.

  Next, based on FIG. 11, the 2nd modification of a conducting wire fixing tool is demonstrated. This modification is characterized in that the insertion portion 35C has a curved shape with a concave surface that contacts the lead-out portion coil lead wire 17b. As for the thickness of the insertion portion 35C, the outer thickness is thicker and the inner thickness is thinner in the radial direction R, as in the above-described embodiment and the first modification. Even in such a curved surface shape, the lead-out portion coil lead wire 17b can be reliably fixed in the lead wire holding groove 15a1. In addition, there are the following effects. That is, in the predetermined range in the radial direction R from the distal end portion of the insertion portion 35c, the thickness of the insertion portion 35C hardly changes. For this reason, when inserting the insertion part 35C between the routing part coil conducting wire 17b and the first wall part 14a1, it can be inserted with a small force in the initial stage. Further, since the thickness of the distal end portion of the insertion portion 35C is not changed, the insertion portion and the coil conductor are not in contact with each other on the inclined surface, and the force in the direction in which the insertion portion 35C comes out of the conductor holding groove 15a1 is further reduced. be able to.

  Next, a modification of the insulator will be described based on FIG. In the split core portion 5D, the insulator 13D is different from the insulator 13 in the split core portion 5 shown in FIG. 2C in the direction and shape of the conductor holding groove 15D. That is, the insulator 13D includes a plurality of wall portions 14D that are curved along the circumferential direction P of the stator core, and has a conductor holding groove 15D that is curved between the wall portions 14D. Even in the case of such a conductor holding groove 15D, by inserting the insertion portion 35D of the conductor fixing tool 31D between the lead portion coil lead wire 17b and the wall portion 14D, the lead portion coil lead wire 17b is connected to the lead wire holding groove 15D. It can be fixed in 15D. In this case, the insertion portion 35D of the conductor fixing tool 31D also needs to be provided at an angle so as to correspond to the curvature of the wall portion 14D. When engaging the conductor fixing tool 31D with the insulator 13D, the conductor fixing tool engaging part 37D may be engaged with the insulator engaging part 19D.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is naturally possible to adopt various configurations without departing from the gist of the present invention. For example, in the above description, the stator having the split core portion has been described as an example, but the present invention is not limited to this. For example, the present invention may be applied to a stator having an annular stator core. Further, the insulator is not divided, and the conductor wire fixing tool of the present invention may be applied to a stator core including an insulator formed in an annular shape.

DESCRIPTION OF SYMBOLS 1 Stator 2 Rotor 3 Holder 5, 5D Split core part 7 Stator core 11 Split iron core 13, 13D Insulator 13a Winding part 13b Leading part 14a-14e, 14D Wall part 15a1-15d, 15D Conductive wire holding groove 17 Coil lead 17a Winding Part coil conductor 17b Lead part coil conductor 19, 19D Insulator engaging part 31, 31D Conductive wire fixtures 35a1 to 35d2, 35D Insertion part 37, 37D Conductor fixing part engaging part X1 Conductor holding groove width X2 Long side of coil conductor Width of

Claims (8)

A stator comprising a stator core formed by arranging a plurality of divided core portions in an annular shape,
Each of the split core portions includes a split iron core, an insulator surrounding a part of the split iron core, a wound coil coil wound around the split iron core via the insulator, and both ends of the wound coil coil A lead portion coil lead wire that is routed by the insulator and a lead wire fixing tool that fixes the lead portion coil lead wire to the insulator;
The insulator has at least one conducting wire holding groove for holding a part of the routing portion coil conducting wire between two adjacent wall portions,
The said conductor fixing tool has a stator which has at least 1 insertion part inserted between the said routing part coil conductor and one of the said two wall parts. The conducting wire holding groove is constituted by one and the other wall portions facing each other,
The lead wire fixing tool includes one lead portion inserted between the lead portion coil lead wire and the one wall portion, and the lead portion coil spaced apart from the one insert portion in the circumferential direction. The stator according to claim 1, further comprising: a second insertion portion that is inserted between a conductive wire and the other wall portion.   The stator according to claim 1 or 2, wherein the thickness of the insertion portion is thicker on the front side than on the back side in the insertion direction into the conductor holding groove.   The stator according to claim 3, wherein the insertion portion has a tapered shape toward an insertion direction into the conducting wire holding groove. The insulator has a plurality of the conductor holding grooves,
The stator according to any one of claims 1 to 4, wherein the conductor fixing tool includes a plate-like fixing body and a plurality of insertion portions extending from the fixing body to the plurality of conductor holding grooves.   The said insulator has an insulator engaging part with which the said wire fixing tool engages, The said wire fixing tool has a wire fixing tool engaging part engaged with the said insulator engaging part. The stator according to any one of the above.   The lead wire coil lead wire is a rectangular wire having a substantially rectangular cross section, and is drawn so that a long side of the substantially rectangular shape is in a width direction of the lead wire holding groove. The stator according to item. A lead wire fixing tool for fixing a lead portion coil lead wire of a stator to a lead wire holding groove formed in an insulator by two wall portions facing each other,
The said wire fixing tool is a wire fixing tool which has at least 1 insertion part inserted between the said routing part coil conducting wire and the said wall part.

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