JPWO2019220635A1 - Stator, rotating electric machine and stator manufacturing method - Google Patents

Abstract

The stator (10) has a laminated iron core (2) in which magnetic steel sheets are laminated, a core wire (84), and an insulating coating (83) covering the core wire (84), and is wound around the teeth portion of the laminated iron core (2). The wound winding body (8), the insulating resin member (4) that insulates the winding body (8) from the tooth portion, and the end portion of the winding body (8) installed on the insulating resin member (4). The winding body (8) of the portion entwined with the connection terminal (5) has an insulating coating (83) on the side facing the laminated iron core (2). The core wire (84) is covered, and the core wire (84) is exposed on the side opposite to the side facing the laminated core (2), and the core wire (84) exposed on the side opposite to the side opposed to the laminated core (2). And the connection terminal (5) are connected.

Description

  The present invention relates to a stator in which a winding body is wound around a laminated iron core and connected, a rotating electric machine, and a method for manufacturing the stator.

  The stator of a rotating electric machine is a stator made by stacking punched laminated steel plates, attaching an insulating resin member, and combining stator pieces with windings wound on the insulating resin member in an annular shape. It is made by electrically and mechanically connecting the winding body of one piece to the connection plate. Hereinafter, electrical and mechanical connection is referred to as wiring. Since the winding body through which the current flows is covered with an insulating coating for insulation between the winding bodies or with other members, when connecting the winding body and the connection plate to the winding wire connection part, It is necessary to remove the applied insulation coating.

  The insulation coating is removed by methods such as melting it with chemicals, incinerating it with a burner, or pressing it with a rotating blade to scrape it, but there are variations in quality, longer cycle times, and more control items. There is a disadvantage that it does. There is also a method of using a wire with a special insulation coating that melts at a temperature lower than the melting point of the solder, but it is not a standard product, which causes cost increase, and it is not easy to procure a wire with a special insulation coating. There is a problem that there is no.

  Patent Document 1 discloses a technique in which after winding a winding body around a connection terminal, the insulating coating is removed with a laser and the connection terminal and the winding body are connected with solder.

JP-A-2000-299240

  However, according to the technique disclosed in Patent Document 1, it is necessary to increase the number of windings at a portion where the winding body is entangled with the connection terminal in order to obtain a peeling area necessary for connecting the connection terminal and the winding body. Therefore, the cycle time of the work for wiring the winding body becomes long, and the usage amount of the winding body increases.

  Therefore, according to the technique disclosed in Patent Document 1, it is not possible to obtain a stator with high reliability of connection between the connection terminal and the winding body and a short cycle time for wiring the winding body.

  The present invention has been made in view of the above, and an object thereof is to obtain a stator with high reliability of connection between a connection terminal and a winding body and a short cycle time for wiring the winding body. To do.

  In order to solve the above-mentioned problems and achieve the object, the present invention has a laminated core in which magnetic steel sheets are laminated, a core wire, and an insulating coating that covers the core wire, and is wound around a tooth portion of the laminated core. And an insulating resin member that insulates the winding body and the tooth portion from each other, and a connection terminal that is installed on the insulating resin member and in which the ends of the winding body are entwined. The portion of the winding body that is entwined with the connection terminals is covered with an insulating coating on the side facing the laminated core, and the core wire is exposed on the side opposite to the side facing the laminated core. The exposed core wire and the connecting terminal are connected on the side opposite to the side facing the laminated core.

  INDUSTRIAL APPLICABILITY The stator according to the present invention has an effect that the connection between the connection terminal and the winding body is highly reliable, and the cycle time of the work for wiring the winding body is short.

Sectional drawing of the rotary electric machine using the stator which concerns on Embodiment 1 of this invention. Front view of the stator according to the first embodiment Side view of the stator according to the first embodiment The front view in the state which removed the solder between the connection terminal and winding body of the stator which concerns on Embodiment 1. The side view in the state which removed the solder between the connection terminal and winding body of the stator which concerns on Embodiment 1. Front view of the laminated core of the stator according to Embodiment 1. The front view of the insulating resin member of the stator which concerns on Embodiment 1. The figure which shows two adjacent stator pieces of the stator which concerns on Embodiment 1. Sectional drawing of two adjacent stator pieces of the stator which concerns on Embodiment 1. Sectional drawing which shows the state which attached the wiring board to the stator piece of the stator which concerns on Embodiment 1. The flowchart which shows the manufacturing method of the stator which concerns on Embodiment 1. The figure which shows the laser apparatus which removes the insulation coating of the winding body of the stator which concerns on Embodiment 1. The figure which shows the state which has removed the insulating coating of the winding body wound by the stator piece of the stator which concerns on Embodiment 1 with the laser apparatus. The figure which shows the state which removed the insulation coating of the winding body wound around the connection terminal of the stator piece of the stator which concerns on Embodiment 1. The figure which shows the external appearance of the soldering apparatus which solders a wire connection terminal and a winding body of the stator which concerns on Embodiment 1. The figure which shows the soldering state in the part from which the insulation coating of the stator different from the stator which concerns on Embodiment 1 was peeled off. Sectional drawing of the stator which concerns on Embodiment 2 of this invention. The figure which shows the process of shape|molding after wrapping the winding end end part of the winding body of the stator which concerns on Embodiment 2 on a connection terminal. Sectional drawing after shaping the winding end portion of the winding body of the stator according to Embodiment 2. Front view of one tooth of a stator according to Embodiment 3 of the present invention The figure which shows the process of entwining the winding end part of the winding body of the stator which concerns on Embodiment 3 after entwining with a connection terminal.

  Hereinafter, a stator, a rotary electric machine, and a method for manufacturing a stator according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment 1.
FIG. 1 is a cross-sectional view of a rotary electric machine that uses a stator according to Embodiment 1 of the present invention. The rotary electric machine 200 includes the stator 10 installed in the housing 201 and the rotor 20 fixed to the shaft 202.

  FIG. 2 is a front view of the stator according to the first embodiment. FIG. 3 is a side view of the stator according to the first embodiment. FIG. 4 is a front view of the stator according to the first embodiment with the solder between the connection terminals and the winding body removed. FIG. 5 is a side view of the stator according to the first embodiment with the solder between the connection terminals and the winding body removed. The stator 10 according to the first embodiment has a plurality of stator pieces 11 arranged in an annular shape and fixed by shrink fitting or press fitting into a frame (not shown). The stator piece 11 includes a laminated iron core 2, an insulating resin member 4, a winding body 8 wound around the insulating resin member 4, a connection terminal 5 in which the winding body 8 is entwined, a winding body 8 and a connection terminal. 5 and the solder 340 for obtaining electrical continuity. The connection terminals 5 of each stator piece 11 are connected to each other.

  The laminated core 2 is configured by laminating a plurality of magnetic steel plate plates. The magnetic steel plate is formed by punching a plate material with a die.

  The connection terminal 5 is made of a conductive material such as copper. The cross section of the connection terminal 5 has a rectangular shape that easily entangles the winding body 8, but the cross section of the connection terminal 5 is not limited to a particular shape.

  FIG. 6 is a front view of the laminated core of the stator according to the first embodiment. The laminated core 2 includes a back yoke portion 12 that forms an outer diameter portion of the stator 10, a tooth portion 13 that protrudes from the inner peripheral side of the back yoke portion 12 toward the center in the inner diameter direction, and an end portion of the tooth portion 13. And a protrusion 14 provided on the. The back yoke portion 12 has jaw portions 121 protruding on both sides of the stator 10 in the circumferential direction. Similarly, the projecting portion 14 has jaw portions 141 projecting on both sides of the stator 10 in the circumferential direction. The back yoke portion 12, the teeth portion 13 and the projection portion 14 form concave slots 6 on both sides of the laminated iron core 2. The jaws 121 on both sides of the back yoke portion 12 have abutting portions 15 at the ends thereof, and the abutting portions 15 come into contact with each other when the plurality of stator pieces 11 are arranged in an annular shape. Form a magnetic path.

  FIG. 7 is a front view of the insulating resin member of the stator according to the first embodiment. FIG. 8 is a diagram showing two adjacent stator pieces of the stator according to the first embodiment. The insulating resin member 4 covers the teeth portion 13 of the laminated iron core 2 around which the winding body 8 is wound and insulates the laminated iron core 2 and the winding body 8 from each other, and the winding portion wound around the winding frame portion 18. The winding body introduction portion 41 into and out of which the winding start end 81 and the winding end end 82 of the wire body 8 come in and out, and the connection terminal holding portion 42 in which the connection terminal 5 is inserted are provided.

  The insulating resin member 4 is made of a thermoplastic resin. Examples of the thermoplastic resin include, but are not limited to, polybutylene terephthalate, liquid crystal polyester, polyphenylene sulfide, and polyacetal.

  For the winding body 8, a copper wire with an insulating coating 83 is used. Examples of the insulating coating 83 include, but are not limited to, polyurethane, polyimide, polyester, and polyamideimide. The insulating coating 83 cannot be completely removed at the soldering temperature, or it takes time to remove it.

  Two stator pieces 11 are continuously wound by one winding body 8. The winding start end portion 81 of the winding body 8 is entwined with the connection terminal 5 of the one stator piece 11, and after being wound around the winding frame portion 18 through the one winding body introduction portion 41, It passes through the other winding body introduction portion 41, passes through one winding body introduction portion 41 of the adjacent stator piece 11, and is wound around the winding frame portion 18. The winding end portion 82 of the winding body 8 passes through the other winding body introducing portion 41 and is entwined with the connection terminal 5. The winding body 8 is wound around the connection terminal 5 once at the winding start end 81 and the winding end end 82. However, at the winding start end 81 and the winding end end 82, the number of windings when the winding body 8 is entwined with the connection terminal 5 is not limited to one.

  FIG. 9 is a cross-sectional view of two adjacent stator pieces of the stator according to the first embodiment. FIG. 9 shows a cross section taken along line IX-IX in FIG. The winding body 8 is provided with an insulating coating 83 for insulating between the winding bodies 8 or other members, but the insulating coating 83 of the winding end portion 82 wound around the connection terminal 5 is The side opposite to the side facing the laminated iron core 2 of the portion entwined with the connection terminal 5 is removed. The solder 340 covers the connection terminal 5 and the winding end portion 82. Similarly to the winding end portion 82 shown in FIG. 9, the winding start end portion 81 has the insulating coating 83 removed and is covered with the solder 340. There is electrical conduction between the portion of the winding body 8 where the insulating coating 83 is removed, the solder 340 and the connection terminal 5.

  FIG. 10 is a cross-sectional view showing a state in which the connecting plate is attached to the stator piece of the stator according to the first embodiment. Each stator piece 11 is connected by connecting the connection plate 19 to the connection terminal 5. The wire connection plate 19 is a terminal plate arranged so as to be connected to the wire connection terminal 5 and formed in a plate shape from resin. The tip of the connection terminal 5 entwining the winding body 8 is arranged in a hole 19a provided in the connection plate 19, and the connection terminal 5 and the connection plate 19 are electrically connected. Therefore, the winding body 8, the connection terminal 5, and the connection plate 19 are connected by the solder 340, and the winding body 8 is connected via the connection plate 19.

  Here, the case where one connection terminal 5 is provided on one stator piece 11 and the winding body 8 is continuously wound over two adjacent stator pieces 11 has been described. When the piece 11 has two connection terminals 5 and the winding start end 81 and the winding end end 82 of the winding body 8 are entangled in different connection terminals 5, the arrangement and connection of the winding body 8 A configuration different from the example is applicable regardless of the number of terminals 5.

  The winding body 8 of each stator piece 11 can be connected by using a lead wire instead of the connection plate 19.

  A method of manufacturing the stator 10 will be described. FIG. 11 is a flowchart showing the stator manufacturing method according to the first embodiment. In step S1, the insulating resin member 4 that insulates the winding body 8 from the laminated iron core 2 formed by laminating magnetic steel sheets is arranged on the laminated iron core 2. A magnetic steel plate is punched using a die, and a plurality of punched magnetic steel plate plates are laminated to manufacture a laminated iron core 2. The laminated core 2 is inserted into a molding die, and the insulating resin member 4 is integrally molded with the laminated core 2 by injection molding. At this time, the aforementioned winding frame portion 18, the winding body introducing portion 41, the connection terminal holding portion 42 for holding the connection terminal 5, and the like are formed. Then, the connection terminal 5 is inserted into the connection terminal holding portion 42.

  In step S<b>2, the winding body 8 is wound around the tooth portion 13 of the laminated iron core 2, and the ends of the winding body 8 are entwined with the connection terminals 5 provided on the insulating resin member 4 to form the stator piece 11. Winding and entanglement of the winding body 8 are performed by operating a nozzle having a hole through which the winding body 8 passes in accordance with a path in which the winding body 8 is desired to be arranged. First, of the two adjacent stator pieces 11, the winding start end portion 81 of the winding body 8 is entwined with the connection terminal 5 of the one stator piece 11. After passing the winding body 8 through the winding body introducing portion 41, the winding body 8 is wound around the teeth portion 13 a set number of times. The winding body 8 is arranged along the surface of the insulating resin member 4 on the outer diameter side of the stator 10 through the other winding body introduction portion 41, and is wound around the winding body introduction portion 41 of the adjacent stator piece 11. The line body 8 is arranged. After the winding body 8 is wound around the tooth portion 13 a set number of times, the winding end portion 82 of the winding body 8 is passed through the winding body introducing portion 41 and entangled with the connection terminal 5, and then the unnecessary winding body 8 is wound. Disconnect.

  In step S3, the stator pieces 11 are arranged in an annular shape. With the stator pieces 11 arranged side by side in an annular shape and held by a jig, a heated frame is inserted and the stator pieces 11 are shrink-fitted and fixed.

  Here, the method of fixing the frame to the stator piece 11 by shrink fitting has been described, but the frame may be press-fitted into the stator piece 11, or the stator pieces 11 arranged in an annular shape may be integrally formed of resin. You may fix it.

  In step S4, the insulating coating 83 on the side opposite to the laminated core 2 of the winding body 8 entwined with the connection terminal 5 is peeled off from the side opposite to the side opposed to the laminated core 2. FIG. 12 is a diagram showing a laser device for removing the insulating coating of the winding body of the stator according to the first embodiment. FIG. 13 is a diagram showing a state in which the insulating coating of the winding body wound around the stator piece of the stator according to the first embodiment is removed by the laser device. FIG. 14 is a diagram showing a state in which the insulating coating of the winding body wound around the connection terminals of the stator piece of the stator according to the first embodiment is removed. As shown in FIGS. 12 and 13, the laser device 50 is arranged on the side of the stator 10 where the connection terminals 5 are provided, and the laser light 51 is applied to the winding body 8 entwined with the connection terminals 5 to insulate the winding body 8. The coating 83 is removed.

  If the distance between the laser device 50 and the stator 10 is set so that the entire end of the stator 10 on the side where the connection terminal 5 is installed falls within the irradiation range of the laser light 51 of the laser device 50, The insulating coating 83 of the winding body 8 of all the stator pieces 11 can be removed by the laser light 51 without changing the position. Since the scanning speed of the laser light 51 can be made faster than the speed at which the stator 10 is moved by the carrier device, a method of removing the insulating coating 83 of the winding body 8 of each stator 10 while changing the position of the stator 10 is used. In comparison, the time required for the work of removing the insulating coating 83 can be shortened.

  Since the laser beam 51 is emitted from the laminating direction of the laminated iron core 2, the insulating coating 83 of the winding body 8 has a side opposite to the side facing the laminated iron core 2 of the portion entwined around the connection terminal 5 as shown in FIG. To be removed. When the insulating coating 83 is removed at a portion where it is not necessary to remove the insulating coating 83 due to the variation in the position of the winding body 8 and the reflection of the laser beam 51, a protective plate is arranged to provide the insulating coating. It is preferable to shield the portion where 83 is not removed so that the laser light 51 does not strike it.

The laser device 50 can use a CO ₂ laser as a laser source, but may use a laser source having another wavelength as long as the insulating coating 83 can be removed. When the insulating coating 83 is removed more and thinner, the energy of the laser beam 51 absorbed by the insulating coating 83 decreases, the temperature of the insulating coating 83 does not rise, and the insulating coating 83 is removed. There are cases where it cannot be exhausted. Even in this case, since the insulating coating 83 is thin, the insulating coating 83 is melted by the heat of the solder 340 at the time of soldering, so that the connection between the connection terminal 5 and the winding body 8 can be obtained.

  In step S5, the insulating coating 83 is peeled off and the exposed core wire 84 is connected to the connection terminal 5. FIG. 15: is a figure which shows the external appearance of the soldering apparatus which solders a connection terminal of a stator and a winding body which concerns on Embodiment 1. As shown in FIG. The solder 340 supplied by the solder supply device 60 is applied to the soldering iron 61 to melt it, and soldering is performed from the side from which the insulating coating 83 is peeled off, and the winding body 8 and the connection terminals 5 are covered with the solder 340.

  In step S6, the connection terminals 5 of the stator piece 11 are connected. The tip portion of the connection terminal 5 is inserted into the hole 19a provided in the connection plate 19 provided with a connection pattern leading to the power supply cable. Then, the connection terminals 5 are connected to each other by soldering the connection terminals 5 and the connection plate 19. The lead wire may be connected to the connection terminal 5 by soldering.

  FIG. 16 is a diagram showing a soldering state in a portion where the insulating coating of the stator different from the stator according to the first embodiment is peeled off. The stator 10 according to the first embodiment shown in FIG. 9 has a laminated iron core 2 formed by laminating magnetic steel sheets, a core wire 84 and an insulating coating 83, and is wound around the tooth portion 13 of the laminated iron core 2. The wire body 8, the insulating resin member 4 that insulates the winding body 8 from the tooth portion 13, and the connection terminal 5 with which the end of the winding body 8 is entangled are provided. In the winding body 8, the side facing the laminated iron core 2 is covered with the insulating coating 83, and the core wire 84 is exposed without being covered with the insulating coating 83 on the side opposite to the side facing the laminated iron core 2. The core wire 84 exposed on the side opposite to the side facing the laminated core 2 and the connection terminal 5 are connected.

  In the stator 10 according to the first embodiment, since the insulating coating 83 on the side opposite to the laminated iron core 2 is removed in the entire portion entwined with the connection terminal 5, the winding body 8 is connected to the connection terminal 5. Even if it is wound once when entwined with, the area for obtaining electrical conduction can be secured. In the stator 10 according to the first embodiment, the insulating coatings 83 of the winding bodies 8 of all the stator pieces 11 arranged in an annular shape can be separated from the laminating direction of the laminated iron core 2, so that the stator 10 for the laser device 50 can be removed. The cycle time is short because there is no need to change the posture. Further, since the portion where the insulating coating 83 is peeled off surrounds the connection terminal 5, the winding body 8 and the connection terminal 5 are firmly fixed.

  On the other hand, when the insulating coating 183 is peeled off by irradiating laser light from a direction perpendicular to the stacking direction of the laminated iron core 102 as in the invention disclosed in Patent Document 1, the position of the stator 110 or the laser device is changed. The insulating coating 183 of all the stator pieces 111 cannot be peeled off unless changed in the middle. Therefore, the stator 110 from which the insulating coating 183 is peeled off by applying the invention disclosed in Patent Document 1 has a longer machining time of the stator 110 than the stator 10 according to the first embodiment. In addition, since the insulating coating 183 is peeled off by irradiating the laser beam from the direction perpendicular to the stacking direction of the laminated core 102, the winding body 108 is wound around the connection terminal 105 to form a coiled end portion 182. In, the insulating coating 183 is peeled off only on one side of the connection terminal 105. In addition to the small amount of solder 134 supplied to the side opposite to the connection terminal 105 and the side opposite to the connection terminal 105, the distance between the connection terminal 105 and the portion where the insulating coating 183 is peeled off and the core wire 184 is exposed is different from that of the laminated iron core 2. This is longer than the distance between the exposed portion of the core wire 84 and the connection terminal 5 in the stator 10 according to Embodiment 1 in which the insulating coating 83 on the opposite side and the opposite side is peeled off. Therefore, the stator 110 from which the insulating coating 183 on the side opposite to the connection terminal 105 is peeled off, the fixing strength between the winding body 108 and the connection terminal 105 is higher than that of the stator 10 according to the first embodiment. Becomes lower, the electrical resistance also increases.

  Therefore, the stator 10 according to the first embodiment has a higher fixing strength between the winding body 8 and the connection terminal 5 than the stator 110 in which the insulating coating 183 on the side opposite to the connection terminal 105 is peeled off. And the efficiency of the motor using the stator 10 can be improved. Therefore, the solder 340 that connects the winding body 8 and the connection terminal 5 is less likely to be peeled off due to the vibration generated during the operation of the motor.

  In cold regions, the copper used as the material of the core wire 84 of the winding body 8 shrinks more than the solder 340, and thus tension may be applied to the soldered portion between the winding body 8 and the connection terminal 5. The cold region here refers to an environment at a temperature lower than the environment in which the winding body 8 and the connection terminal 5 are soldered. Since the rotating electric machine using the stator 10 generates heat during use, when it is used intermittently in cold regions, the expansion and contraction of the core wire 84 causes repeated stress to act on the solder 340, which causes the winding body 8 and the connection terminal 5 to be separated. The solder 340 to be connected may be peeled off and the electrical connection may be damaged. Since the stator 10 according to the first embodiment can firmly fix the winding body 8 and the connection terminal 5 to each other, even if the winding body 8 and the connection terminal 5 are intermittently used in a cold region, the electrical connection between the winding body 8 and the connection terminal 5 is prevented. There is no risk of losing a good connection.

  Further, when the insulating coating 83 is peeled off while the winding body 8 is being wound, it is necessary to determine the peeling length of the insulating coating 83 in consideration of the variation of the elongation of the coil or the variation of the positioning. In the stator 10, since the insulating coating 83 is peeled off after the winding body 8 is entangled with the wire connection terminal 5, the insulating coating 83 can be peeled off only in a portion necessary for wire connection, and the peeling length can be shortened. Therefore, it is possible to reduce the direct material cost and improve the procurable property. Further, since the step of winding the winding body 8 and the step of peeling the insulating coating 83 can be performed separately, the cycle time of the winding machine can be shortened and the processing cost can be reduced.

  Here, the stator 10 in which the frame is shrink-fitted and fixed to the divided laminated iron cores 2 has been described, but the stator 10 has a structure in which the divided laminated iron cores 2 are connected to each other by welding or the like. It may be an inserted structure. Further, the same can be applied to a connecting core in which the laminated cores 2 are connected to each other by a thin connecting portion.

  In order to improve the holding state and heat transfer property of the winding body 8 under vibration, the winding body 8, the winding end portion 82 or the winding start end 81, the connection terminal 5, and the connection plate 19 are made of a thermosetting resin. You may cover and. Since the resin enters the gap and hardens, heat is easily transferred, and vibration and noise are reduced. As described above, in the stator 10 according to the first embodiment, the winding body 8 and the connection terminal 5 can be firmly fixed, so that the winding body 8 and the winding end end 82 or the winding start end 81 are connected. When the terminal 5 and the wire connection plate 19 are covered with the thermosetting resin, there is no possibility that the winding body 8 and the wire connection terminal 5 are separated by the pressure of the resin and the electrical connection is lost.

  In the above description, the solder 340 is used to connect the winding body 8 and the connection terminal 5, but the winding body 8 and the connection terminal 5 may be connected by a conductive adhesive or by brazing. The wire may be connected, or the core wire 84 of the winding body 8 may be melted with a laser and connected.

Embodiment 2.
FIG. 17 is a sectional view of the stator according to the second embodiment of the present invention. FIG. 17 shows a cross section corresponding to line IX-IX of the stator 10 according to the first embodiment. The winding end portion 82 of the winding body 8 is pressed toward the laminated iron core 2 side in the laminating direction of the laminated iron core 2 to form the cross-section deformed portion 85. At the winding end portion 82, the winding bodies 8 partially overlap each other in the laminating direction of the laminated iron core 2. There is a deformed part in the lower step of the spiral.

  The manufacturing process of the stator 10 according to the second embodiment is a process of manufacturing the stator 10 according to the first embodiment, in which the winding end end portion 82 of the winding body 8 is entwined with the connection terminal 5 and then formed. Is added. FIG. 18 is a diagram showing a step of forming the winding end portion of the winding body of the stator according to the second embodiment after the winding terminal is wrapped around the connection terminal. FIG. 19 is a cross-sectional view after molding the winding end portion of the winding body of the stator according to the second embodiment. By pressing the winding end portion 82 from the lamination direction of the laminated core 2 with the jig 29 to form the cross-section deformed portion 85 at the winding end portion 82, the winding body 8 is formed on the side opposite to the laminated core 2 side. The cross section of the core wire 84 is deformed. In the second embodiment, since the portion of the jig 29 that is in contact with the winding body 8 is flat, the cross-section deforming portion 85 has a chordal portion in the cross section of the core wire 84 of the winding body 8. .. In addition, the winding end 8 is partially overlapped in the laminating direction of the laminated core 2 by pressing the winding end end 82 with the jig 29 from the laminating direction of the laminated iron core 2 to form the winding end 8. The dimension H in the stacking direction is smaller than that before molding.

  Here, only the winding end portion 82 is described, but the winding start end portion 81 is also pressed toward the laminated core 2 side in the laminating direction of the laminated iron core 2 to be molded, whereby the dimension in the laminating direction can be reduced. it can.

  In addition to the effect of the stator 10 according to the first embodiment, the stator 10 according to the second embodiment stabilizes the position in the laminating direction of the laminated iron core 2 of the winding body 8 entwined with the connection terminal 5. Therefore, the effect that the insulation coating 83 can be removed stably can be obtained. The laser beam 51 oscillated by the laser device 50 has a larger spot diameter and a smaller output per unit area as it moves away from the focal position, so that the positions of the winding bodies 8 in the laminating direction of the laminated core 2 are uneven. This causes variations when removing the insulating coating 83. In the stator 10 according to the second embodiment, the variation in the dimension H of the winding end portion 82 in the stacking direction is reduced, and the insulating coating 83 can be removed within a range close to the focal position. Therefore, the removal of the insulating coating 83 is stable. You can do it.

Embodiment 3.
FIG. 20 is a front view of one tooth of the stator according to the third embodiment of the present invention. Note that the illustration of the solder is omitted in order to facilitate understanding of the structure. In the stator 10 according to the third embodiment, the winding end end portion 82 of the winding body 8 entwined around the connection terminal 5 is pressed from the outer peripheral side of the winding body 8 toward the connection terminal 5 side, and thus the winding end end portion 82. Is formed so that the dimension W in the radial direction is small. Since the winding body 8 is pressed against the connection terminal 5 when the winding end portion 82 is formed, the winding body 8 has an indentation 86. The indentation 86 has a shape in which the outer shape of the connection terminal 5 is transferred.

  The manufacturing process of the stator 10 according to the third embodiment is a process of manufacturing the stator 10 according to the first embodiment, in which the winding end portion 82 of the winding body 8 is entwined with the connection terminal 5 and then formed. Is added. FIG. 21 is a diagram showing a step of forming the winding end portion of the winding body of the stator according to the third embodiment after the winding terminal is wrapped around the connection terminal. An indentation 86 is formed on the winding body 8 by pressing the winding end portion 82 from the outer peripheral side of the winding body 8 in the radial direction of the stator 10 with the jig 30 to form the winding end portion 82. The radial dimension W of the winding end portion 82 is reduced.

  Although only the winding end portion 82 is described here, the winding start end portion 81 is also pressed from the outer peripheral side of the winding body 8 in the radial direction of the stator piece 11 with the jig 30. By forming, the dimension of the winding start end portion 81 in the radial direction can be reduced.

  The stator according to the third embodiment has the effect that the stator according to the first embodiment has, and in addition, the winding body 8 entwined with the connection terminal 5 contacts the connection terminal 5 and the peeling position is stable. Thus, the insulation coating 83 can be stably removed.

  The configurations described in the above embodiments are examples of the content of the present invention, and can be combined with another known technique, and the configurations of the configurations are not departing from the scope of the present invention. It is also possible to omit or change parts.

  2,102 laminated iron core, 4 insulating resin member, 5,105 connection terminal, 6 slot, 8,108 winding body, 10,110 stator, 11,111 stator piece, 12 back yoke part, 13 teeth part, 14 Projection part, 15 Abutment part, 18 Winding frame part, 19 Connection plate, 19a hole, 20 Rotor, 29, 30 jig, 41 Winding body introduction part, 42 Connection terminal holding part, 50 Laser device, 51 Laser light , 60 solder supply device, 61 soldering iron, 81 winding start end, 82,182 winding end end, 83,183 insulation coating, 84,184 core wire, 85 cross-section deformation part, 86 indentation, 121,141 jaw part, 134, 340 solder, 200 rotating electric machine, 201 housing, 202 shaft.

In step S3, placing a stator piece 11 in annular shape. In a state where the stator pieces 11 are arranged side by side in an annular shape and held by a jig, a heated frame is inserted, and the stator pieces 11 are shrink-fitted and fixed.

Claims (6)

A laminated iron core in which magnetic steel sheets are laminated,
A winding body that has a core wire and an insulating coating that covers the core wire, and that is wound around a tooth portion of the laminated iron core;
An insulating resin member that insulates the winding body from the teeth portion,
Installed on the insulating resin member, having a connection terminal in which the end of the winding body is entangled,
The winding body of the portion entwined with the connection terminal is covered with the insulating coating on the side facing the laminated iron core, and the core wire is exposed on the side opposite to the side facing the laminated iron core. Cage,
A stator characterized in that the core wire exposed on the side opposite to the side facing the laminated iron core and the connection terminal are connected.   The stator according to claim 1, wherein the winding body of the portion entwined with the connection terminal is wound once around the connection terminal.   The cross-section deformed portion in which the cross-sectional shape of the core wire is deformed is formed on the side opposite to the side facing the laminated iron core in the winding body of the portion entwined with the connection terminal. The stator described in 2.   The indentation in which the outer shape of the connection terminal is transferred is formed on the side of the winding body entwined with the connection terminal on the side facing the connection terminal. Stator.   A rotating electric machine comprising the stator according to any one of claims 1 to 4. A step of disposing an insulating resin member that insulates the laminated core and the winding body formed by laminating magnetic steel sheets on the laminated core;
Winding the winding body around the teeth portion of the laminated iron core, and forming a stator piece by entwining an end portion of the winding body with a connection terminal installed on the insulating resin member,
Arranging the stator pieces in an annular shape,
A step of peeling the insulating coating on the side opposite to the side facing the laminated core of the winding body entwined with the connection terminal from the side opposite to the side facing the laminated core;
A method of manufacturing a stator, comprising: connecting the core wire exposed by peeling off the insulating coating and the connection terminal.

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