JP2012253979A - Rotary electric machine and method for manufacturing the same - Google Patents

Abstract

A rotating electrical machine capable of reliably locking the terminal portion with respect to the insulator without deteriorating the insulation of the terminal portion of the coil, and thereby suppressing the loosening of the coil, and its manufacture Provide a method.
A stator 10 constituting a rotating electric machine has a stator core 16 formed by arranging a plurality of divided core portions 14 in an annular shape, and a coil 18 of each divided core portion 14 is interposed via an insulator 26. In this manner, the rectangular wire 18a is wound around the split iron core 24. In the insulator 26, a portion of the stator core 16 radially outside the coil 18 extends in the circumferential direction of the stator core 16 and opens in the axial direction, and extends in the radial direction of the stator core 16. A guide groove 84 that opens in the circumferential direction is formed, and the terminal end 30 of the coil 18 is locked to the insulator 26 while being inserted into the lock groove 98 and the guide groove 84.
[Selection] Figure 12

Description

  The present invention relates to a rotating electrical machine including a stator core formed by arranging a plurality of divided core portions in an annular shape and a method for manufacturing the same.

  2. Description of the Related Art Conventionally, a rotating electrical machine in which a stator having a stator core formed by arranging a plurality of divided core portions in an annular shape is incorporated, for example, a motor is widely used.

  Each of the divided core portions generally includes a divided iron core, an insulator surrounding a part of the divided iron core, and a coil formed by winding a conductive wire around the divided iron core via the insulator. .

  In the manufacture of the stator, in a state where a plurality of the divided core portions are arranged in an annular shape, the end portions of the coils that have been drawn in advance radially outward of the stator core are routed along the circumferential direction of the stator core to supply power lines. There are cases where a procedure for connecting to a cable is taken.

  In this case, for example, when the terminal portion (final terminal portion) of the coil is routed, a force on the radially inner side of the stator core may act on the terminal portion to cause loosening of the coil. It should be noted that loose winding of the coil can also occur when the split core portion is transferred.

  As a method for preventing such coil loosening, there is provided a slit having a slit into which the terminal end portion of the coil can be inserted and a return portion provided in the slit to prevent the terminal portion from coming out of the slit. A technical idea of providing a stop portion on an insulator has been proposed (see, for example, Patent Document 1).

JP 2008-278694 A

  In the prior art described above, when the terminal portion of the coil is inserted into the slit, the terminal portion of the coil hits the return portion and the coating is peeled off, so that the insulation of the terminal portion may be lowered.

  In addition, although fixing the terminal part of a coil to an insulator with an adhesive agent etc. is also considered, there exists a possibility that this adhesive agent may melt | dissolve during a driving | running | working of a rotary electric machine, and it may have a bad influence on other apparatuses.

  The present invention has been made in consideration of such problems, and can reliably lock the terminal portion with respect to the insulator without deteriorating the insulation of the terminal portion of the coil. An object of the present invention is to provide a rotating electrical machine capable of suppressing loosening of the coil and a method for manufacturing the same.

[1] A rotating electrical machine according to the present invention is a rotating electrical machine in which a stator including a stator core formed by annularly arranging a plurality of divided core portions is incorporated, and each of the divided core portions includes a divided iron core, An insulator surrounding a part of the split iron core; and a coil wound around the split iron core via the insulator; and the insulator is located on a radially outer side of the stator core than the coil. A locking means for locking a terminal portion of the coil; the locking means includes a first groove portion configured to allow insertion of the terminal portion; and the first groove portion configured to allow insertion of the terminal portion. A second groove portion that extends in a direction intersecting with the extending direction of the groove portion and opens in a direction different from the opening direction of the opening portion of the first groove portion is formed.

  According to the rotating electrical machine of the present invention, since the extending direction of the second groove portion intersects the extending direction of the first groove portion, the end portion of the coil is inserted into the first groove portion and the second groove portion. By doing so, the terminal portion can be locked to the insulator in a bent state. Further, since the opening of the second groove portion opens in a direction different from the opening direction of the opening of the first groove portion, the terminal portion is prevented from slipping out of the first groove portion and the second groove portion. be able to. In this case, since the return part etc. are not provided in the 1st groove part and the 2nd groove part, the coat of the terminal part of a coil is not peeled off. Therefore, since the terminal portion can be reliably locked to the insulator without deteriorating the insulation of the terminal portion of the coil, loosening of the coil can be suppressed.

[2] In the above rotating electric machine, the end portion of the coil has a rectangular cross section, and the groove width of the first groove portion is set to be substantially the same as the short side of the rectangle. The groove width of the second groove part is preferably set to be substantially the same as the long side of the rectangle.

  According to this configuration, even if the cross section of the terminal portion of the coil is formed in a rectangular shape, the terminal portion can be easily inserted into each of the first groove portion and the second groove portion. Moreover, since the movement of the terminal portion in the groove width direction within the first groove portion and the second groove portion can be suitably restricted, loosening of the coil can be reliably suppressed.

[3] In the above rotating electric machine, the first groove extends along the circumferential direction of the stator core and opens in the axial direction of the stator core, and the second groove extends along the radial direction of the stator core. It is preferable to extend and open in the circumferential direction.

  According to this configuration, since the first groove portion is formed so as to extend along the circumferential direction of the stator core and open in the axial direction of the stator core, the end portion of the coil is inserted into the first groove portion. Thus, the movement of the stator core in the radial direction (inward in the radial direction) at the terminal portion can be restricted. Thereby, loosening of the coil can be suitably suppressed.

  In addition, since the second groove portion is formed so as to extend along the radial direction of the stator core and open in the circumferential direction of the stator core, the terminal portion of the coil is inserted into the second groove portion, The movement of the stator core in the axial direction in the terminal portion can be restricted. Thereby, it can prevent that this terminal part slips out from this 1st groove part.

[4] In the rotating electrical machine described above, a connecting member that connects a bottom surface forming the first groove and a radially inner end of the stator core on a side surface forming the second groove, and the connecting member is provided on the connecting member. And it is preferable to further comprise a wall portion that restricts movement of the bent portion on the connecting member in the terminal portion of the coil to the inner side in the radial direction.

  According to this configuration, by providing the wall portion on the connecting member, it is possible to restrict the bending portion on the connecting member at the end portion of the coil from moving inward in the radial direction of the stator core. Looseness can be reliably suppressed.

[5] A method for manufacturing a rotating electrical machine according to the present invention is a method for manufacturing a rotating electrical machine in which a stator having a stator core formed by arranging a plurality of divided core portions in an annular shape is incorporated, and through an insulator A coil forming step of forming a coil of the split core portion by winding a conductive wire around the split iron core, and a terminal portion of the coil formed in the coil forming step is positioned on a radially outer side of the stator core than the coil A first insertion step of inserting into a first groove formed in the locking means of the insulator; and a first insertion step formed in the locking means and extending in a direction intersecting with the extending direction of the first groove. The second insertion step of inserting the terminal portion into the second groove portion that opens in a direction different from the opening direction of the opening portion of the one groove portion is performed.

  According to the method of manufacturing a rotating electrical machine according to the present invention, since the terminal portions of the coils are inserted into the first groove portion and the second groove portion whose extending directions intersect with each other, the terminal portions are locked to the insulator in a bent state. can do. Further, since the opening of the second groove portion opens in a direction different from the opening direction of the opening of the first groove portion, the terminal portion is prevented from slipping out of the first groove portion and the second groove portion. be able to. In this case, since the return part etc. are not provided in the 1st groove part and the 2nd groove part, the coat of the terminal part of a coil is not peeled off. Therefore, since the terminal portion can be reliably locked to the insulator without deteriorating the insulation of the terminal portion of the coil, loosening of the coil can be suppressed.

[6] In the above method for manufacturing a rotating electrical machine, the conducting wire is a rectangular wire having a rectangular cross section, and the first groove extends along the circumferential direction of the stator core and extends in the axial direction of the stator core. Opening and in the coil forming step, the rectangular wire is wound around the split iron core via the insulator so that the long side of the rectangular wire is along the radial direction of the stator core, and the stator core at the terminal portion of the coil The step of twisting the terminal portion by approximately 90 ° so that the side surface located on the radially inner side is directed to the side on which the divided core is located may be performed between the coil forming step and the first insertion step. preferable.

  According to this method, the terminal portion is twisted by approximately 90 ° so that the side surface located on the radially inner side of the stator core in the terminal portion of the coil is directed to the side where the split core is located, and then the terminal portion is Inserted into the groove. Therefore, a restoring force is applied to the terminal portion so as to fall toward the radially outer side of the stator core while being inserted into the first groove portion. Thereby, it can further suppress that this terminal part moves to the radial inside of the said stator core.

  As described above, according to the present invention, by inserting the terminal portions of the coils into the first groove portion and the second groove portion whose extending directions intersect and whose opening directions are different from each other, the insulation of the terminal portions is improved. Since the terminal portion can be reliably locked to the insulator without being lowered, loosening of the coil can be suppressed.

It is a top view of the stator integrated in the rotary electric machine which concerns on one Embodiment of this invention. It is a perspective view of the division | segmentation core part shown in FIG. It is a disassembled perspective view of the division | segmentation core part shown in FIG. It is a front view of the conducting wire storage part which comprises the insulator shown in FIG. FIG. 4 is a partially omitted perspective view of a routing portion constituting the insulator shown in FIG. 3. FIG. 6 is a plan view of FIG. 5. It is a flowchart for demonstrating the manufacturing method of the rotary electric machine which concerns on one Embodiment of this invention. It is a flowchart for demonstrating manufacture of the division | segmentation core part shown in FIG. It is a partially-omission perspective view of the split core part which shows the state in which the coil was formed. It is a partially-omission perspective view of the split core part which shows the state which twisted the terminal part of the coil. It is a partially-omission perspective view of the division | segmentation core part which shows the state which inserted the terminal part of the coil in the latching groove part. It is a partially-omission perspective view of the division | segmentation core part which shows the state which inserted the terminal end part of the coil in the guide groove part. FIG. 4 is a partially omitted plan view of a stator core showing a state in which a terminal end portion of a coil is routed to a routing portion.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a rotating electrical machine according to the present invention will be described with reference to the accompanying drawings by giving preferred embodiments in relation to a stator incorporated therein.

  The stator 10 according to the present embodiment constitutes a rotating electrical machine in combination with a rotor provided therein, and is used, for example, as an electric motor or a generator.

  The stator 10 is a so-called three-phase Y-connection salient pole wound stator. As shown in FIG. 1, the stator 10 has a hollow holder (housing) 12, three-phase input terminals U, V, W, and neutral. A neutral terminal N that forms a point, and a stator core 16 that is formed by annularly arranging a plurality (18 in FIG. 1) of divided core portions 14 along the inner peripheral surface 12a of the holder 12 are provided.

  The stator core 16 includes six divided core portions 14 each having U-phase, V-phase, and W-phase coils 18. In this case, in the stator core 16, the plurality of divided core portions 14 are arranged in a ring shape, whereby a U phase (U1 phase to U6 phase), a V phase (V1 phase to V6 phase), and a W phase (W1 phase to W6 phase). ) Are arranged in the order of U1, V1, W1, U2,..., U6, V6, W6 in the clockwise direction of FIG.

  Next, among the divided core units 14 having the coils 18 of the U1 phase to U6 phase, the V1 phase to V6 phase, and the W1 phase to W6 phase, the configuration of one divided core unit 14 is typically shown in FIG. Description will be given with reference to FIG. In addition, the structure of the split core part 14 demonstrated here is a structure common to the split core part 14 of all the phases.

  As shown in FIGS. 2 and 3, the split core portion 14 includes a split core 24 formed by laminating a plurality of substantially T-shaped metal plates (steel plates) 22 punched by a press, and the split core 24 is electrically connected. Insulator 26 that is electrically insulated, coil 18 that is wound around split iron core 24 via insulator 26, and start terminal portion 28 of coil 18 that is electrically connected to one of input terminals U, V, and W. And a terminal portion 30 of the coil 18 electrically connected to the neutral terminal N.

  The coil 18, the start terminal portion 28, and the end terminal portion 30 are configured by a single continuous wire. The conducting wire is configured as a rectangular wire 18a having a rectangular cross section. In addition, the cross-sectional shape of the said conducting wire can be changed arbitrarily, for example, circular shape may be sufficient.

  The split iron core 24 extends along the circumferential direction (arrow A direction) of the stator core 16 and toward the radially inner side (arrow B1 direction) of the stator core 16 from the substantially center in the circumferential direction of the yoke portion 24a. And a magnetic pole part 24b extending. A substantially semicircular fitting recess 32 is formed at one end (the end in the direction of arrow A1) of the yoke portion 24a, and the above-mentioned fitting is provided at the other end (the end in the direction of arrow A2) of the yoke portion 24a. A substantially semicircular fitting projection 34 corresponding to the mating recess 32 is formed.

  The insulator 26 has flexibility and is made of, for example, an insulating material such as resin. The insulator 26 is positioned around the winding portion 38 around which the flat wire 18a is wound, and on the radially outer side (in the direction of arrow B2) of the stator core 16 than the winding portion 38, and the start terminal portion 28 of the coil 18 is moved toward the arrow A. It has a routing part 40 for routing the input terminal U, V, W along the direction to the neutral terminal N along the arrow A direction.

  The winding part 38 includes a first winding part 38 a and a second winding part 38 b that can be fitted in the axial direction (arrow C direction) of the stator core 16. The first winding portion 38a includes a first winding portion main body 42a formed in a substantially U-shaped cross section, and a first inner peripheral wall erected on the end of the first winding portion main body 42a in the arrow B1 direction. 44a and a first outer peripheral wall 46a erected at the end of the first winding portion main body 42a in the arrow B2 direction.

  The second winding portion 38b includes a second winding portion main body 42b having a substantially U-shaped cross section, and a second inner peripheral wall erected on the end of the second winding portion main body 42b in the arrow B1 direction. 44b and the 2nd outer peripheral wall 46b standingly arranged by the edge of the said 2nd winding part main body 42b in the arrow B2 direction.

  The first winding portion main body 42a and the second winding portion main body 42b, the first inner peripheral wall 44a and the second inner peripheral wall 44b, and the first outer peripheral wall 46a and the second outer peripheral wall 46b are partially overlapped and joined. That is, the winding portion 38 is configured by fitting the first winding portion 38a to the second winding portion 38b and integrating them from the direction of the arrow C1 (downward in FIG. 3).

  The magnetic pole portion 24b of the split iron core 24 is inserted into the central hole 48 obtained as a result of the integration. Further, the coil 18 is wound by winding a rectangular wire 18a between the first inner peripheral wall 44a and the second inner peripheral wall 44b and the first outer peripheral wall 46a and the second outer peripheral wall 46b in the winding portion 38. It is formed.

  The routing portion 40 includes a support plate 50 provided so as to protrude in the direction of the arrow B2 from the vicinity of the end of the second outer peripheral wall 46b in the direction of the arrow C2 (upward in FIG. 3), and a coil provided on the support plate 50. The lead wire storage portion 52 that can store the 18 start terminal portions 28 or the end terminal portion 30, and a locking portion 54 that is provided in the wire storage portion 52 and locks the end terminal portion 30 of the coil 18.

  The conducting wire storage portion 52 includes a base portion 56 standing in the arrow C2 direction from the support plate 50, and a first block 58a and a second block 58b standing on the upper surface of the base portion 56 in a state of being separated from each other in the arrow A direction. And a connecting portion 60 that connects the back surfaces of the first block 58a and the second block 58b (the surfaces facing the arrow B1 direction).

  As shown in FIG. 4, the base portion 56 is provided with an overhanging plate 62 that protrudes from the upper end portion in the direction of arrow A and the direction of arrow B2. The upper surface of the support plate 50 and the lower surface of the overhanging plate 62 terminate at the outer surface of the base portion 56. As a result, a storage groove portion 64 is formed by the upper surface of the support plate 50, the outer surface of the base portion 56, and the lower surface of the overhang plate 62.

  The storage groove portion 64 is set to a size that can store the start terminal portion 28 of the coil 18. Specifically, the groove width (length in the direction of arrow C) of the storage groove 64 is set to be approximately the same as the width (long side length) W (see FIG. 2) of the flat wire 18a. .

  In the first block 58a, three projecting plates 70a, 72a, 74a projecting from the outer surface in the direction of the arrow A1 and the direction of the arrow B2 are provided in parallel to the support plate 50 at equal intervals in the direction of the arrow C. (See FIG. 2 and FIG. 3). The overhanging plate 74a is located at the upper end of the first block 58a.

  The upper surface of the overhanging plate 62 and the lower surface of the overhanging plate 70a terminate at the outer surface of the first block 58a. Thus, a storage groove 76a is formed by the upper surface of the overhang plate 62, the outer surface of the first block 58a, and the lower surface of the overhang plate 70a.

  Similarly, a storage groove 78a is formed by the upper surface of the projecting plate 70a, the outer surface of the first block 58a, and the lower surface of the projecting plate 72a, and the upper surface of the projecting plate 72a, the outer surface of the first block 58a, A storage groove 80a is formed by the lower surface of the overhanging plate 74a.

  The second block 58b is formed to be approximately the same size as the first block 58a. In the second block 58b, three projecting plates 70b, 72b, 74b projecting from the outer surface in the direction of the arrow A2 and the direction of the arrow B2 are provided in parallel to the support plate 50 at equal intervals in the direction of the arrow C. (See FIG. 2 and FIG. 3). The overhang plate 74b is located at the upper end of the second block 58b. The overhanging plates 72b and 74b reach the back surface of the second block 58b (see FIGS. 5 and 6).

  The upper surface of the overhanging plate 62 and the lower surface of the overhanging plate 70b terminate at the outer surface of the second block 58b. As a result, a storage groove 76b is formed by the upper surface of the overhang plate 62, the outer surface of the second block 58b, and the lower surface of the overhang plate 70b.

  Similarly, a storage groove 78b is formed by the upper surface of the projecting plate 70b, the outer surface of the second block 58b, and the lower surface of the projecting plate 72b, and the upper surface of the projecting plate 72b, the outer surface of the second block 58b, And the storage groove part 80b is formed by the lower surface of the overhang | projection board 74b.

  Specifically, the storage groove 80b extends along the arrow A direction and opens in the arrow B2 direction, and the storage groove 80b communicates with the holding groove 82 and extends along the arrow B direction. And a guide groove (second groove) 84 that opens in the A2 direction (see FIG. 6).

  As can be seen from FIG. 4, the storage groove 76a and the storage groove 76b, the storage groove 78a and the storage groove 78b, and the storage groove 80a and the storage groove 80b are located at substantially the same height. The groove widths of the storage groove portions 76a, 76b, 78a, 78b, 80a, and 80b are set to be the same as the groove width of the storage groove portion 64 described above.

  Further, the groove depth along the arrow B direction of the storage groove portions 76a, 76b, 78a, 78b is set to be the same as the groove depth along the arrow B direction of the storage groove portion 64, and the storage groove portions 80a, 80b The groove depth along the arrow B direction is set to be larger than the groove depth of the storage groove portion 64.

  In the conductive wire storage part 52 configured as described above, as shown in FIG. 5, the back face of the base part 56, the back face of the first block 58 a, the back face of the second block 58 b, and the back face of the connecting part 60. One curved surface 86 is formed.

  The engaging portion 54 includes a substantially rectangular parallelepiped support portion 88 provided at an end of the curved surface 86 in the arrow A2 direction (the back surface of the base portion 56 and the back surface of the second block 58b), and the arrow of the support portion 88. A wall portion 90 provided at an end portion in the B1 direction, a conductive wire guide portion (connecting member) 92 that protrudes from the upper end portion of the support portion 88 in the arrow A2 direction and is integrally formed with the overhanging plate 72b, and a conductive wire The wall portion 94 protrudes in the direction of the arrow C2 from the end of the guide portion 92 in the direction of the arrow B1.

  The support portion 88 is connected to the upper surface of the support plate 50. The wall portion 90 extends along the upper surface of the support portion 88 and the side surface facing the arrow A1 direction. As shown in FIG. 6, the back surface of the upper portion 96 of the second block 58 b (the portion positioned above the projecting plate 72 b) and the side surface of the wall portion 90 facing the arrow B <b> 2 direction terminate on the upper surface of the support portion 88. To do. Thus, a locking groove (first groove) 98 is formed by the back surface of the upper portion 96 of the second block 58b, the side surface of the wall portion 90, and the upper surface of the support portion 88.

  That is, the locking groove 98 extends along the arrow A direction and opens in the arrow C2 direction. The groove width (length along the arrow B direction) of the locking groove portion 98 is set to be substantially the same as the thickness (short side length) d (see FIG. 2) of the flat wire 18a.

  The wall portion 94 is provided over the entire length of the conductor guide portion 92 in the arrow A direction. The height of the wall portion 94 is larger than the height of the wall portion 90 and is set to be approximately the same as the groove width (length along the arrow C direction) of the guide groove portion 84. The wall portion 94 is formed with an inclined surface that inclines in the arrow B2 direction as it goes in the arrow A2 direction.

  Next, a method for manufacturing the rotating electrical machine according to the present embodiment will be described. First, each divided core part 14 is manufactured (step S1 in FIG. 7). Specifically, steps S11 to S15 shown in FIG. 8 are performed.

  That is, the first winding part 38a is fitted to the second winding part 38b so that the split iron core 24 is inserted into the hole 48 of the winding part 38 (step S11 in FIG. 8). Thereafter, as shown in FIG. 9, the coil is wound around the winding portion 38 in a state in which the flat wire 18a having the same shape is laid down (the width direction of the flat wire 18a is along the radial direction of the stator core 16). 18 is formed (step S12).

  In the coil 18 formed in this way, the flat wire 18a overlaps in the thickness direction. In addition, the start terminal portion 28 of the coil 18 extends in the arrow B direction in a state of being inserted into a groove portion that extends in the arrow B direction and opens in the arrow A1 direction in the storage groove portion 64. As a result, the start terminal portion 28 of the coil 18 is locked to the insulator 26. At this time, the end terminal portion 30 of the coil 18 extends in the direction of arrow A while being positioned in the vicinity of the conductor housing portion 52.

  Subsequently, as shown in FIG. 10, the terminal end portion 30 of the coil 18 is twisted (rotated) by approximately 90 ° and is in the standing state (a state in which the width direction of the flat wire 18 a is aligned with the axial direction of the stator core 16). (Step S13). Specifically, the end terminal portion 30 of the coil 18 is twisted by approximately 90 ° so that the side surface of the end terminal portion 30 of the coil 18 located in the arrow B1 direction is oriented in the arrow C1 direction.

  In this step S13, the end terminal unit 30 may be twisted by approximately 90 ° so that the side surface of the end terminal unit 30 located in the arrow B1 direction is oriented in the arrow C2 direction.

  Thereafter, the terminal end 30 of the coil 18 is lifted in the direction of arrow C2 and inserted into the locking groove 98 (see step S14, FIG. 11), and the terminal end 30 of the coil 18 is inserted into the outer surface of the upper portion 96 of the second block 58b. And is inserted into the guide groove 84 (see step S15, FIG. 12). Thereby, the terminal part 30 of the coil 18 is latched with respect to the insulator 26 in the bent state. At this stage, the manufacturing process of the split core portion 14 shown in FIG.

  In the split core portion 14 manufactured in this way, the terminal end portion 30 of the coil 18 is diametrically oriented in the stator core 16 by the locking groove portion 98 (in the radial direction of the stator core 16 and toward the side where the coil 18 is located). Movement along is limited.

  Further, since the movement of the end terminal portion 30 along the axial direction of the stator core 16 is restricted by the guide groove portion 84, the end terminal portion 30 can be prevented from coming out of the locking groove portion 98. In this case, since the return portion or the like is not provided in the locking groove portion 98 and / or the guide groove portion 84, the coating of the end terminal portion 30 is not peeled off.

  Thereby, the end terminal portion 30 can be reliably locked to the insulator 26 without deteriorating the insulation of the end terminal portion 30 of the coil 18. Therefore, for example, loosening of the coil 18 can be suppressed when the split core portion 14 is transferred.

  Next, the plurality of manufactured divided core portions 14 are arranged in an annular shape along the inner peripheral surface 12a of the holder 12 (step S2 in FIG. 7). Then, as shown in FIG. 13, the terminal end 30 of the coil 18 is routed in the circumferential direction of the stator core 16 and stored in the storage grooves 80a and 80b (step S3).

  In this case, a force in the direction of the arrow B1 may act on a portion of the terminal end portion 30 of the coil 18 that is disposed in the guide groove portion 84. However, since the bent portion 100 on the conductor guide portion 92 in the end terminal portion 30 contacts the wall portion 94, the movement of the bent portion 100 in the direction of the arrow B1 can be limited. Even if it exists, the winding looseness of the coil 18 can be suppressed reliably.

  Further, the start terminal portion 28 of the coil 18 is drawn around in the circumferential direction of the stator core 16 and stored in the storage grooves 64, 76a, 76b, 78a, 78b (step S4). Thereafter, the end terminal 30 of the coil 18 is connected to the neutral terminal N, the start terminal 28 of the U1 phase to U6 phase coil 18 is connected to the input terminal U, and the start terminal of the V1 phase to V6 phase coil 18 is connected. The part 28 is connected to the input terminal V, and the start terminal part 28 of the W1 phase to W6 phase coil 18 is connected to the input terminal W (step S5). Thereby, the stator 10 is manufactured.

  And a rotary electric machine is manufactured by incorporating the rotor which is not illustrated in the stator 10 (step S6). At this stage, the manufacturing process of the rotating electrical machine is completed.

  According to the present embodiment, the groove width of the locking groove portion 98 is set to substantially the same length as the width W of the flat wire 18a, and the groove width of the guide groove portion 84 is substantially the same as the thickness d of the flat wire 18a. Since the length is set, the end terminal portion 30 of the coil 18 can be easily inserted into each of the locking groove portion 98 and the guide groove portion 84.

  Moreover, the radial movement of the stator core 16 at the end terminal portion 30 can be suitably limited in the locking groove portion 98, and the axial movement of the stator core 16 at the end terminal portion 30 is preferable in the guide groove portion 84. Can be limited to. Therefore, loose winding of the coil 18 can be more reliably suppressed.

  In the present embodiment, the end terminal portion 30 of the coil 18 is twisted by approximately 90 ° so that the side surface of the end terminal portion 30 in the direction of the arrow B1 is oriented in the direction of the arrow C1 (the side where the split iron core 24 is located) Thereafter, the end terminal portion 30 is inserted into the locking groove portion 98. Therefore, a restoring force that falls in the direction of the arrow B <b> 2 acts on the end terminal portion 30 while being inserted into the locking groove portion 98. Thereby, it can further suppress that the terminal part 30 of the coil 18 moves to the radial inside of the stator core 16.

  The present invention is not limited to the embodiment described above, and it is naturally possible to adopt various configurations without departing from the gist of the present invention.

  For example, the extending direction and the opening direction of the locking groove portion 98 and the guide groove portion 84 can be arbitrarily changed. In short, the extending direction of the locking groove portion 98 and the extending direction of the guide groove portion 84 cross each other, and the locking groove portion 98 only needs to open in a direction different from the opening direction of the guide groove portion 84. Even in this case, the terminal end 30 of the coil 18 can be locked to the insulator 26 in a bent state, and the terminal end 30 can be pulled out from the locking groove 98 and the guide groove 84. It can suppress suitably.

DESCRIPTION OF SYMBOLS 10 ... Stator 14 ... Split core part 16 ... Stator core 18 ... Coil 24 ... Split core 26 ... Insulator 28 ... Start terminal part 30 ... End terminal part 54 ... Locking part 84 ... Guide groove part (2nd groove part)
92 ... Conductor guide portion (connecting member) 94 ... Wall portion 98 ... Locking groove portion (first groove portion) 100 ... Bending portion

Claims (6)

A rotating electrical machine incorporating a stator having a stator core formed by annularly arranging a plurality of divided core portions,
Each of the split core portions includes a split iron core,
An insulator surrounding a part of the divided iron core;
A coil wound around the split iron core via the insulator,
The insulator has a locking means that locks a terminal portion of the coil located outside the stator core in the radial direction of the coil,
In the locking means, a first groove portion configured to be able to insert the terminal portion;
A second groove portion configured to be insertable with the terminal portion, extending in a direction intersecting with the extending direction of the first groove portion, and opening in a direction different from the opening direction of the opening portion of the first groove portion; A rotating electric machine characterized in that is formed. The rotating electrical machine according to claim 1, wherein
The terminal portion of the coil has a rectangular cross section,
The groove width of the first groove portion is set to a length substantially the same as the short side of the rectangle,
The rotary electric machine characterized in that the groove width of the second groove portion is set to be substantially the same as the long side of the rectangle. In the rotating electrical machine according to claim 1 or 2,
The first groove extends along the circumferential direction of the stator core and opens in the axial direction of the stator core,
The rotating electrical machine, wherein the second groove portion extends along a radial direction of the stator core and opens in the circumferential direction. In the rotating electrical machine according to claim 3,
A connecting member that connects a bottom surface forming the first groove and a radially inner end of the stator core on a side surface forming the second groove;
A rotating electrical machine further comprising: a wall portion provided on the connecting member and restricting a bending portion on the connecting member at the terminal portion of the coil from moving inward in the radial direction. A method of manufacturing a rotating electrical machine in which a stator having a stator core formed by arranging a plurality of divided core portions in an annular shape is incorporated,
A coil forming step of forming a coil of the split core portion by winding a conductive wire around the split iron core via an insulator;
A first insertion step of inserting a terminal portion of the coil formed in the coil formation step into a first groove portion formed in a locking means of the insulator located radially outside the stator core from the coil;
In the second groove portion formed in the locking means and extending in a direction crossing the extending direction of the first groove portion and opening in a direction different from the opening direction of the opening portion of the first groove portion, the terminal And a second insertion step of inserting the part. A method of manufacturing a rotating electrical machine. In the manufacturing method of the rotary electric machine according to claim 5,
The conducting wire is a rectangular wire having a rectangular cross section,
The first groove extends along the circumferential direction of the stator core and opens in the axial direction of the stator core,
In the coil forming step, the rectangular wire is wound around the split iron core via the insulator so that the long side of the rectangular wire is along the radial direction of the stator core,
The step of twisting the terminal portion by approximately 90 ° so that the side surface of the end portion of the coil located on the radially inner side of the stator core is directed to the side on which the divided core is located, the coil forming step and the first step A method of manufacturing a rotating electrical machine, which is performed between the insertion step and the insertion step.

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