JP2006280155A - Rotating electric machine and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To commonize the shape of a terminal in divided cores corresponding to each phase, and to enhance its insulation properties. <P>SOLUTION: A stator core is constituted of annually combining a plurality divided cores 18. The coil ends of the divided cores 18a are mutually connected for each phase via a first to third connection lead wires 12, 14, 16 corresponding to axially arranged U, V, W phases. The first to third connection lead wires 12, 14, 16 are connected to a coil by a second fixing part 54 of the U-shaped part of a first terminal 36. A second fixing part 54 at a portion corresponding to the W phase allowing the third connection lead wire 16 to pass at the deepest portion has a connector which is bonded under pressure by pressing the portion allowing the connection lead wire to pass through from both side surfaces, and a seal which is closed by being pressed from both side surfaces on the opening side further than the connector by a process other than the process for forming the connector. A sealing agent 150 is injected into a circular groove 83 formed by the peripheral walls of the housing and the divided cores. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention uses a stator core in which a plurality of split cores are connected in a ring shape, a plurality of connection conductors provided corresponding to each phase, and a terminal for connecting the end of the coil and the connection conductors in the split core. The present invention relates to a rotating electrical machine manufactured by the manufacturing method and a manufacturing method thereof.

  Some conventional stators for rotating electrical machines are composed of a plurality of divided cores. The split core includes an arc-shaped yoke portion and a tooth portion extending in the inner diameter direction, and a coil is wound around the tooth portion. By using such a split core, the coil winding process around the tooth portion is easily performed, and the space factor of the coil can be improved.

  In a stator using split cores, a plurality of annular conductors corresponding to the number of phases are used to connect split cores corresponding to the same phase, and the rotating electrical machine is connected to the coil end of the split core via a terminal. Has been proposed (see, for example, Patent Document 1).

  In this rotating electrical machine, by forming the connection portion of the annular conductor in a shape that is bent in accordance with the shape of the terminal, the engagement between the annular conductor and the terminal is simple, and the crimping process is easily performed. Further, the annular conductor is preferable because it is inexpensively manufactured simply by bending a general-purpose insulating conductor.

JP 2004-56873 A

  By the way, in the rotating electrical machine described in Patent Document 1, the annular conductors for each phase to be held are arranged in the axial direction and have different heights, and the terminal connecting the annular conductor and the coil is the height of the annular conductor. Depending on the situation, the shape is different for each phase. Providing different terminals for each phase makes the assembly work complicated, and it is desirable to apply terminals having the same shape as much as possible from the viewpoint of common parts.

  In addition, the thermosetting resin may be injected and heated after the crimping process to the connection part between the annular conductor and the coil to improve the insulation, and the connection part can be suitably insulated by this insulation process. It is desirable that

  The present invention has been made in consideration of such problems, and provides a rotating electrical machine in which the shape of a terminal in a split core corresponding to each phase is made common and the insulation is improved, and a method for manufacturing the same. For the purpose.

  A rotating electrical machine according to the present invention includes a stator core in which a plurality of divided cores are connected in an annular shape, a plurality of connecting wires arranged in the axial direction corresponding to each phase and extending in the circumferential direction, and a coil in the divided cores And a terminal having the same shape provided with a U-shaped portion having a U-shaped portion that is connected to each of the end portions, opens in one of the axial directions, and passes through the connecting conductor at different positions in the axial direction corresponding to the phases. In the electric machine, the terminal corresponding to the phase through which the connection conducting wire passes at the deepest position of at least the U-shaped portion among the plurality of phases is formed by pressing a portion through which the connection conducting wire is pressed from both side surfaces and crimped. In addition, one of the axial directions as viewed from the joining portion includes a sealing portion that is pressed and closed from both sides by a separate process from the formation of the joining portion.

  The rotating electrical machine manufacturing method according to the present invention includes a stator core in which a plurality of divided cores are connected in an annular shape, a plurality of connection conductors arranged in the axial direction corresponding to each phase, and extending in the circumferential direction, Using terminals of the same shape provided with U-shaped portions that are respectively connected to end portions of the coils in the split core, open to one side in the axial direction, and through which the connecting conductors pass at different positions in the axial direction corresponding to the phases. In a manufacturing method of a rotating electrical machine to be manufactured, a bonding step of pressing a portion through which the connection conductor wire passes in the terminal from both side surfaces by a predetermined pressure bonding means, and a portion closer to the opening than the portion crimped in the bonding step A sealing step in which the crimping means presses both sides to close the opening, and in the sealing step, the connecting wire passes through at least the deepest position of the U-shaped portion of the plurality of phases. And performing to the terminal corresponding to the phase.

  In this way, there is almost no space by performing the crimping process of the joining process and the sealing process twice on the terminal corresponding to the phase through which the connecting conductor passes through the deepest position of the U-shaped part. The connecting conductor is firmly fixed, and the terminal corresponding to the phase can have the same shape as the terminal corresponding to the other phase. Moreover, since it has a shape having almost no space, there is no influence of thermal expansion of air when a thermosetting resin is injected and heated after the crimping process to improve insulation. Accordingly, there is no generation of bubbles, movement or deformation of the space, and insulation with the thermosetting resin is appropriately performed, and the insulation performance is improved.

  The U-shape here may be any shape that has a height at which each of the connecting conductors arranged in the axial direction can be disposed and is open upward, such as a V-shape and a J-shape. included.

  According to the rotating electrical machine and the method for manufacturing the same according to the present invention, the crimping process of the joining process and the sealing process is performed twice on the terminal corresponding to the phase through which the connecting conductor passes at least at the deepest position of the U-shaped portion. By doing so, the connecting conductor is fixed with almost no space.

  Therefore, the terminal corresponding to the said phase can be made into the same shape as the terminal corresponding to another phase. Moreover, since it has a shape having almost no space, there is no influence of thermal expansion of air when a thermosetting resin is injected and heated after the crimping process to improve insulation. Accordingly, there is no generation of bubbles, movement or deformation of the space, and insulation with the thermosetting resin is appropriately performed, and the insulation performance is improved.

  Embodiments of a rotating electrical machine and a method for manufacturing the same according to the present invention will be described below with reference to FIGS. The rotating electrical machine according to the present embodiment is composed of a stator 10 and a rotor 11 shown in FIG. 1, and is assembled to a casing (not shown) and used as an electric motor or a generator. Moreover, the crimping | compression-bonding process which is 1 process of several manufacturing processes is performed for the stator 10 with the crimping | compression-bonding apparatus 100 shown in FIG.

  As shown in FIG. 1, the stator 10 is a three-phase Y-type stator, and is electrically connected to the three-phase input terminals U, V, W and the three-phase input terminals U, V, W, respectively. Annular first to third connection conductors 12, 14, 16 (see FIG. 4), a stator core 19 in which 18 divided cores 18 are annularly connected, and the first to third connection conductors 12, 14 , 16 are integrally held.

  The first connection conductor 12 connected to the input terminal U is disposed at a predetermined distance from the inner peripheral surface of the hollow housing 22, and is connected to the input terminal V above the first connection conductor 12. The second connecting conductor 14 and the third connecting conductor 16 connected to the input terminal W are arranged in the housing 22 in this order. A peripheral wall 22 a surrounding the outer periphery of the stator 10 is provided on the upper surface of the housing 22. The first to third connecting conductors 12, 14, and 16 are disposed so as to be spaced apart from each other along the axial direction of the housing 22. In addition, the order of the 1st-3rd connection conducting wires 12, 14, 16 arrange | positioned inside the housing 22 is not limited to this, The three-phase 1st-3rd connection conducting wires 12, 14, 16 Need only be arranged in the axial direction corresponding to each phase.

  As shown in FIG. 2, the first to third connection conducting wires 12, 14, 16 include an arc portion 24 formed to have substantially the same diameter, and a connection portion 26 protruding from the arc portion 24 by a predetermined length in the inner circumferential direction. And a lead portion 28 connected to the three-phase input terminals U, V, and W. The connecting portions 26 are formed at six locations spaced at a predetermined angle at equal intervals, and the connecting portions 26 are formed in a U shape by bending so as to open to the outer peripheral side. That is, the positions of the connection portions 26 of the first to third connection conductors 12, 14, and 16 are the positions of the split cores 18 a, 18 b, and 18 c that are connected to the first to third connection conductors 12, 14, and 16, respectively. In order to correspond to the positions, they are arranged offset from each other by a predetermined angle along the circumferential direction. Therefore, when the first to third connection conducting wires 12, 14, 16 are disposed inside the housing 22, the connection portions 26 of the first to third connection conducting wires 12, 14, 16 may overlap in the vertical direction. Absent. Hereinafter, for convenience, the divided cores 18a, 18b, and 18c are distinguished from each other in correspondence with the U phase, the V phase, and the W phase, but these are actually the same shape.

  The holding member 20 is formed in a circular arc shape with a resin material, and the outer circumferences of the first to third connection conducting wires 12, 14, 16 are surrounded by the three holding members 20 formed in substantially the same shape over the entire circumference. On the inner peripheral side of the holding member 20, first to third holding grooves 98 a to 98 c that are recessed in a semicircular cross section are provided so as to be separated by a predetermined interval. The first connection conductor 12, the second connection conductor 14, and the third connection conductor 16 are sequentially attached to the first holding groove 98a, the second holding groove 98b, and the third holding groove 98c. In addition, the said holding member 20 is not limited to the shape divided into 3 parts, What is necessary is just to be able to hold | maintain the 1st-3rd connection conducting wires 12, 14, and 16 in the state spaced apart by predetermined spacing.

  As shown in FIG. 3, the split core 18 includes a laminated steel plate 30 obtained by caulking and integrating a plurality of substantially T-shaped steel plates punched by a press, and an insulator 32 a made of a resin material that insulates the laminated steel plate 30. 32b, a coil 34 wound around the laminated steel plate 30 via the insulators 32a and 32b, and a first terminal 36 and a second terminal 38 made of a metal material to which the coil 34 is connected. The laminated steel plate 30 is formed in a substantially T shape by a yoke part and a tooth part, and a coil 34 is wound around the tooth part.

  The coil 34 is composed of a conductive wire 42 having an insulating coating, and the tip 44 of each coil 34 disposed on the outer peripheral side of the stator 10 is first to first through the first terminal 36 provided on the split core 18. It is electrically connected to any one of the three connection conductors 12, 14, and 16. The extending portions 46 of the coils 34 disposed on the inner peripheral side of the stator 10 are electrically connected to each other via the second terminal 38 provided on the split core 18. Specifically, every other six divided cores 18a (see FIG. 1) are connected to the input terminal U via the lead portion 28 of the first connecting conductor 12, and every other six divided cores 18a are connected to the input terminal U. The split core 18b (see FIG. 1) is connected to the input terminal V via the lead portion 28 of the second connection conductor 14, and the remaining six split cores 18c (see FIG. 1) are leads of the third connection conductor 16. The input terminal W is connected via the unit 28. The divided cores 18 a to 18 c, the input terminals U, V, and W and the first to third connection conducting wires 12, 14, and 16 are assembled inside the hollow housing 22.

  The insulators 32a and 32b have winding portions of the coil 34, peripheral walls 66a and 66b provided on the inner peripheral side, and peripheral walls 68a and 68b provided on the outer peripheral side.

  As shown in FIGS. 3 to 5, the first terminal 36 is composed of a substantially T-shaped metal terminal, and is inserted into a groove 48 (see FIG. 5) formed on the outer peripheral side of the insulator 32 a. The first fixing portion 52 for fixing the tip end portion 44 of the coil 34 and the first fixing portion 52 formed on the opposite side of the insertion portion 50 as a reference, and the first to third connecting conductors 12, 14, 16. It has the 2nd fixing | fixed part (U-shaped part) 54 which fixes any one. A small protrusion 56 pressed by a punch or the like is provided at a substantially central portion slightly above the insertion portion 50.

  The second terminal 38 is inserted into the mounting portion 57 (see FIG. 3) of the insulator 32a so that the bottomed portion faces downward. The second terminal 38 electrically connects the ends of the coils 34 in the adjacent split cores 18 by the notches 58 and 60 to form a neutral point of the Y-type connection.

  The second fixing portion 54 is curved so as to correspond to the cross-sectional shape of each connection portion 26 of the first to third connection conducting wires 12, 14, and 16, and each U-shape opens upward in a side view from the radial direction. It is formed into a shape. The connection portions 26 of the first to third connection conducting wires 12, 14, and 16 are sequentially arranged so as to pass through the upper, substantially intermediate height, and lower portions of the U-shaped portion of the second fixing portion 54. The third connection conductor 16 corresponding to the phase is a phase passing through the deepest position among the three phases.

  The distal end portion 44 at one end of the coil 34 extends toward the outer peripheral side of the split core 18 and is held by the first fixing portion 52 of the first terminal 36.

  A first notch groove 72 through which the tip end portion 44 of the coil 34 is inserted is provided slightly to the left of the center of the peripheral wall 68a on the outer peripheral side of the insulator 32a. At one end of the peripheral wall 68a on the side where the first cutout groove 72 is formed, a recess 76 is formed on the inner surface side of the overhanging portion 74 that slightly protrudes on the outer peripheral side. At the other end of the peripheral wall 68a, a protruding portion 78 is formed that slightly protrudes into a shape that fits into the recessed portion 76.

  A small piece 82 having an engaging groove 80 in the circumferential direction is provided upright on the outer peripheral side of the substantially central portion of the peripheral wall 68a and spaced apart from the peripheral wall 68a by a predetermined distance, and between the small piece 82 and the peripheral wall 68a. , A groove 48 is provided. Further, an annular groove 83 (see FIG. 1) is formed on the outer peripheral portion of the upper surface of the stator 10 with the peripheral wall 68a of the insulator 32a and the peripheral wall 22a of the housing 22 as both side walls and the yoke portion of the laminated steel plate 30 as the bottom surface. .

  Next, the crimping apparatus 100 that performs the crimping process on the stator 10 will be described.

  As shown in FIG. 6, the crimping apparatus 100 includes a turntable 102 on which the stator 10 is placed, a slide mechanism 104 that horizontally moves the turntable 102 in the direction of arrow B, and a rotation mechanism that intermittently rotates the turntable 102. 106, a crimping mechanism 108 for crimping the first fixing portion 52 and the second fixing portion 54 of the first terminal 36 to the horizontally moved stator 10, a lifting mechanism 110 for raising and lowering the crimping mechanism 108, and these And a control unit 112 that comprehensively controls each mechanism unit.

  The stator 10 is placed and fixed so as to have a predetermined initial orientation when the turntable 102 is arranged on the left side in FIG. 6, and then moved to the right side, and the second fixing portion 54 of the split core 18a. Is arranged directly below the crimping mechanism 108. The elevating mechanism 110 elevates and lowers the crimping mechanism 108 with a cylinder built therein so that the height is instructed by the control unit 112.

  As shown in FIG. 7, the pressure-bonding mechanism 108 is based on an elevating plate 114, an air cylinder 116 that is pressurized and released, a pressure spring 118 that transmits a driving force of the air cylinder 116, and a work shaft C. On the right side, a first moving plate 122 that moves horizontally along the horizontal rail 120 under the action of the air cylinder 116, and a symmetric operation with respect to the working axis C with respect to the first moving plate 122 by a predetermined synchronization mechanism. And a second moving plate 124. The left end of the first moving plate 122 and the right end of the second moving plate 124 are provided with long plate-shaped crimping tools 128 and 130 that are symmetrical with respect to the working axis C.

  A part of the crimping tool 128 projects downward from the first moving plate 122, the projecting portion has a tapered tip, and the crimping surface 128a at the left end is a vertical surface. Similarly, a portion of the crimping tool 130 that protrudes downward from the second moving plate 124 has a tapered tip, and the right crimp surface 130a is a vertical surface. The pressure-bonding surface 130 a and the pressure-bonding surface 128 a are opposed to each other, and the width in the height direction is slightly longer than the height of the second fixing portion 54. The crimping surfaces 128a and 130a are disposed at the same position as the left end surface of the first moving plate 122 and the right end surface of the second moving plate 124 or at a position close to the working axis C. When the moving plate 124 approaches, the crimping surfaces 128a and 130a abut on the work axis C to generate a strong pressing force. The crimping tools 128 and 130 are made of metal and are provided in contact with the electrode plates 128b and 130b, and are gripped between the crimping tools 128 and 130 by applying a voltage to the electrode plates 128b and 130b. The first terminal 36 is energized and heated. The crimping tools 128 and 130 are fixed to the insulating plates 122a and 124a. The crimping tools 128 and 130 are interchangeable.

  Next, a method of performing a crimping process on the first fixing part 52 and the second fixing part 54 using the crimping apparatus 100 configured as described above will be described. In the following description, it is assumed that processing is executed in the order of the step numbers described unless otherwise noted.

  First, in step S1 of FIG. 8, with the turntable 102 disposed at the left-side preparation position in FIG. 6, the stator 10 is disposed on the turntable 102 so as to have a predetermined initial orientation and fixed. To do. Further, the control unit 112 resets the work counter I to “0”. The work counter I is a parameter indicating the number of times the crimping process is performed on the stator 10 and corresponds to the number of divided cores 18.

  In step S2, the turntable 102 is moved to the work position on the right side in FIG. 6 (the position shown in FIG. 6) under the action of the slide mechanism 104, and the second fixing portion 54 of the split core 18a corresponding to the U phase is moved. It arrange | positions so that it may be directly under the crimping tools 128 and 130 of the crimping | compression-bonding mechanism 108. At this time, the crimping mechanism 108 is in the upper retracted position, and the crimping tools 128 and 130 are separated from each other.

  In step S3, based on the work counter I, the phase corresponding to the split core 18 disposed immediately below the crimping tools 128 and 130 is checked. If it is the U phase, the process proceeds to step S4, and if it is the V phase, step S5 is performed. If it is the W phase, the process proceeds to step S6. The corresponding phase is determined based on the remainder obtained by dividing the work counter I by 3.

  In step S4 (for the U phase), as shown in FIG. 10, the crimping mechanism is operated under the action of the elevating mechanism 110 so that the tip portions of the crimping tools 128 and 130 are located above the second fixed portion 54. 108 is lowered. Thereby, the front-end | tip part of the crimping tools 128 and 130 is set to the substantially same height as the 1st connection conducting wire 12 corresponding to U phase.

  In step S5 (with respect to the V phase), as shown in FIG. The mechanism 108 is lowered. Thereby, the front-end | tip part of the crimping tools 128 and 130 is set to the substantially same height as the 2nd connection conducting wire 14 corresponding to a W phase.

  In step S6 (with respect to the W phase), as shown in FIG. 12, the lifting mechanism 110 is operated so that the tip portions of the crimping tools 128 and 130 are at the substantially lowermost height of the second fixing portion 54. The crimping mechanism 108 is lowered. Thereby, the front-end | tip part of the crimping tools 128 and 130 is set to the substantially same height as the 3rd connection conducting wire 16 corresponding to a W phase.

  After steps S4, S5, and S6, in step S7 (joining process), the air cylinder 116 is driven, and the crimping tools 128 and 130 are moved and moved toward the work axis C to press both side surfaces of the second fixing portion 54. And then crimp. As a result, the first connection conductor 12, the second connection conductor 14, and the third connection conductor 16 are deformed so as to extend in the vertical direction, and are in contact with the second fixing portion 54 over a wide area to be in electrical contact with each other. 54a (see FIG. 13A) is formed.

  That is, in the first terminal 36 of the split core 18a corresponding to the U phase, as shown in FIG. 13A, the first connecting conductor 12 is joined to the upper portion of the second fixing portion 54, and the second fixing portion 54 The inner wall side of the U-shaped part is blocked by the first connecting conductor 12. Further, as shown in FIG. 13B, the first terminal 36 of the split core 18 b corresponding to the V phase has the second connecting conductor 14 joined to the substantially central height portion of the second fixing portion 54, and the second fixing portion 54. The inner wall side of the U-shaped part is substantially closed by the second connecting conductor 14. Furthermore, as shown in FIG. 13C, the first terminal 36 of the split core 18c corresponding to the W phase has the third connecting conductor 16 joined to the lower portion of the second fixing portion 54, and the second fixing portion 54 includes: Open upward.

  In step S8, the electrode plate 128b, 130b is energized while the second fixing portion 54 is held by the crimping tools 128, 130, and the first connection conductor 12, the second connection conductor 14, or the third connection conductor 16 is heated. As a result, the coating is melted to further secure the electrical connection to the second fixing portion 54. After heating for a predetermined time, the energization is stopped, and the crimping tools 128 and 130 are moved in the direction of separating from the work axis C, respectively, and separated from the second fixed portion 54.

  In step S9, the phase corresponding to the split core 18 arranged immediately below the crimping tools 128 and 130 is checked. If it is the U phase or the V phase, the process proceeds to step S12, and if it is the W phase, the process proceeds to step S10. The corresponding phase is determined based on the work counter I as in step S3.

  In step S10 (with respect to the W phase), as shown in FIG. 14, the crimping tools 128 and 130 are crimped under the action of the elevating mechanism 110 so that the tip ends of the crimping tools 128 and 130 are substantially at the intermediate height of the second fixing portion 54. Raise mechanism 108. This height may be substantially the same as the height of the crimping tools 128 and 130 set in step S5.

  In step S11 (sealing step), the spring 118 is driven to move and approach the crimping tools 128 and 130 toward the work axis C to press and crimp both side surfaces of the second fixed portion 54. As a result, as shown in FIG. 13D, the upper inner side surfaces of the U-shaped portion of the first terminal 36 are in contact with each other, and the upper portion that has been opened is closed, and the sealing portion 54b is located above the joining portion 54a. Is formed.

  After the second crimping process, the crimping tools 128 and 130 are moved in the direction of separating from the working axis C, and separated from the second fixing portion 54.

  In step S12, the crimping mechanism 108 is raised to the retracted position under the action of the lifting mechanism 110.

  In step S13 of FIG. 9, the turntable 102 is rotated A ° clockwise by the rotation mechanism 106 when viewed from above. Here, A ° is an angle between the first fixed portion 52 and the second fixed portion 54 in the split core 18 when viewed from the center of the stator 10 (see FIG. 1), and the crimping tools 128 and 130 are the first. It will be arranged above the fixed part 52.

  In step S <b> 14, as shown in FIG. 15, the crimping mechanism 108 is lowered under the action of the elevating mechanism 110 so that the tip portions of the crimping tools 128 and 130 are at the same height as the first fixing portion 52. Thereafter, the first fixing portion 52 is crimped to the end of the coil 34 by moving and approaching the crimping tools 128 and 130 toward the work axis C as in step S7 (step S15) and step S8. In the same manner as described above, energization is performed and heat treatment (step S16) is performed to melt the coating on the end of the coil 34. Thereafter, the crimping tools 128 and 130 are moved in directions away from the work axis C, separated from the first fixing portion 52, and the crimping mechanism 108 is raised to the retracted position as in step S12 (step S17).

  In step S18, it is confirmed whether or not the crimping process has been completed for all 18 divided cores 18. This confirmation is judged by the work counter I. After incrementing as I ← I + 1, if I = 18, the crimping process is terminated and the process proceeds to step S20, and if I <18, the process proceeds to step S19.

  In step S19, the turntable 102 is rotated clockwise (20-A) ° by the rotation mechanism 106 when viewed from above, and the crimping tools 128 and 130 are disposed above the second fixing portion 54 in the adjacent split core 18. To do. That is, since the stator 10 has 18 poles, the crimping tools 128 and 130 are rotated by rotating 20 ° (= A ° + (20−A) °) with respect to the second fixed portion 54 of the adjacent divided core 18. Is disposed above the second fixing portion 54. Thereafter, the process returns to step S3 to continue the crimping process.

  In step S20, the turntable 102 is returned to the left-side preparation position in FIG. 6 under the action of the slide mechanism 104, and the stator 10 that has undergone the crimping process is taken out.

  In step S <b> 21, a thermosetting resin sealant is injected over the entire circumference of the annular groove 83 of the stator 10. The sealant is injected while moving the tip of a predetermined seal injector along the annular groove 83.

  At this time, as shown in FIG. 16, in the second fixing portion 54 in the split core 18 a corresponding to the U phase, the space portion 152 is formed by the side walls of the first connecting conductor 12 and the second fixing portion 54. The volume of the space 152 is sufficiently small, and is surrounded by the side walls of the first connecting conductor 12 and the second fixing portion 54 and does not communicate with the outside. In addition, in the second fixed portion 54 in the split core 18b corresponding to the V phase, a space portion 154 below the second connection conducting wire 14 and a space portion 156 above are formed. The volumes of these spaces 154 and 156 are very small, and are practically negligible spaces. In the second fixed portion 54 in the split core 18c corresponding to the W phase, the upper portion of the third connection conductor 16 is blocked by the double strike of step S11, so there is almost no space.

  In step S22, the stator 10 injected with the sealant 150 is placed in an electric furnace and heated. The heated sealant 150 is cured to insulate the first terminal 36, prevent leakage and short circuit, and fix the first terminal 36.

  At this time, in the second fixing portion 54 of the split core 18a corresponding to the U phase, the space portion 152 has a small volume and the periphery is covered with the side wall of the second fixing portion 54 and the first connection conducting wire 12. Therefore, the thermal expansion of the air is limited, and the space portion does not move, deform, or bubble and reach the upper surface 150a of the sealant 150. Moreover, in the 2nd fixing | fixed part 54 in the split core 18b corresponding to V phase, the volume of the space part 154 and the space part 156 is so small as to be negligible, and there is no influence of thermal expansion. Furthermore, since there is almost no space in the second fixing portion 54 in the split core 18c corresponding to the W phase, there is no influence due to thermal expansion of air.

  If the double punching process in step S11 is not performed, the second fixing portion 54 has a shape opened upward, and a space portion is formed. When the space portion is heated in the electric furnace, the space portion expands. There is a concern that it will reach the upper surface of the sealant. In this case, the 2nd fixing | fixed part 54 and the 3rd connection conducting wire 16 are exposed outside, and insulation will fall.

  On the other hand, in the present embodiment, the upper part of the second fixing portion 54 is closed by double strike in step S11, so there is almost no space, and even if heated in an electric furnace, it is caused by thermal expansion. Air bubbles and the like do not rise, and good insulation by the sealant 150 is maintained or improved.

  Moreover, the 1st fixing | fixed part 52 and the 2nd fixing | fixed part 54 in U phase, V phase, and W phase are each crimped | bonded by the same crimping tools 128 and 130, and it is not necessary to provide a different kind of crimping tool according to a location. The crimping tools 128 and 130 have a simple shape and are inexpensive. Furthermore, the first terminal 36 has the same shape regardless of the phase, and the split cores 18a, 18b, and 18c have the same shape. Therefore, the work of arranging the split cores 18 in an annular shape is easily performed, and further cost reduction can be achieved by sharing parts.

  In addition, although the shape of the 2nd fixing | fixed part 54 illustrated as U shape, it has the height which can arrange | position the 1st-3rd connection conducting wires 12, 14, and 16 arranged in the axial direction, and opens upwards. The shape may be any shape, and includes a V shape and a J shape. In the above description, the sealing step (step S11) is performed only on the second fixing portion 54 of the split core 18c corresponding to the W phase, but the upper space portion 156 in the V phase second fixing portion 54 is described. When (refer FIG. 13B) is comparatively large, you may give a sealing process with respect to the said location.

  The rotating electrical machine and the method for manufacturing the same according to the present invention are not limited to the above-described embodiments, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

It is a top view of the stator of the rotary electric machine which concerns on embodiment of this invention. It is a disassembled perspective view of a 1st-3rd connection conducting wire and a holding member. It is a perspective view of the split core assembled | attached to a stator. It is a side view of the outer peripheral upper part in a division | segmentation core. It is a partially omitted exploded perspective view when the first terminal is mounted on the split core. It is a side view of a crimping | compression-bonding apparatus. It is a front view of the crimping mechanism and the lifting mechanism in the crimping apparatus. It is a flowchart (the 1) which shows the procedure of performing the crimping | compression-bonding process of a stator with a crimping | compression-bonding apparatus, and the procedure of performing the insulation process which inject | pours sealing agent. It is a flowchart (the 2) which shows the procedure of performing the crimping | compression-bonding process of a stator with a crimping | compression-bonding apparatus, and the procedure of performing the insulation process which inject | pours sealing agent. It is a figure which shows the process of crimping | bonding the U-shaped part in the division | segmentation core of a U phase. It is a figure which shows the process of crimping | bonding the U-shaped part in the division | segmentation core of V phase. It is a figure which shows the 1st process of crimping | bonding the U-shaped part in the division | segmentation core of W phase. 13A is a cross-sectional view of the U-shaped portion of the U-phase that has been crimped, FIG. 13B is a cross-sectional view of the U-shaped portion of the V-phase that has been crimped, and FIG. 13C is the first crimping step. FIG. 13D is a cross-sectional view of the W-shaped U-shaped part that has been crimped, and FIG. 13D is a cross-sectional view of the W-shaped U-shaped part that has been crimped in the second crimping process. It is a figure which shows the 2nd process of crimping | bonding the U-shaped part in the division | segmentation core of W phase. It is a figure which shows the process of crimping | bonding a 1st fixing | fixed part. It is a cross-sectional side view along the circumferential direction of the annular groove into which the sealing agent was injected.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Stator 12, 14, 16 ... Connection conducting wire 18, 18a-18c ... Split core 19 ... Stator core 22 ... Housing 34 ... Coil 36, 38 ... Terminal 54 ... 2nd fixing | fixed part (U-shaped part)
54a ... joining part 54b ... sealing part 83 ... annular groove 100 ... crimping device 102 ... turn table 104 ... sliding mechanism 106 ... rotating mechanism 108 ... crimping mechanism 110 ... lifting mechanism 128, 130 ... crimping tool 128a, 130a ... crimping surface 128b, 130b ... Electrode plate 150 ... Sealing agent 150a ... Upper surface 152, 154, 156 ... Space

Claims (2)

A stator core in which a plurality of split cores are connected in an annular shape;
A plurality of connecting wires arranged in the axial direction corresponding to each phase and extending in the circumferential direction;
A terminal having the same shape, which is connected to each end of the coil in the split core and has a U-shaped portion that opens in one of the axial directions and through which the connecting conductor passes at different positions in the axial direction corresponding to the phases;
In a rotating electrical machine manufactured using
The terminal corresponding to the phase through which the connecting wire passes at the deepest position of at least the U-shaped portion of the plurality of phases,
A joint part pressed and pressed from both side surfaces through the connecting conductor; and
On the one hand in the axial direction as seen from the joint part, a sealing part pressed and closed from both side surfaces by a separate process from the formation of the joint part,
A rotating electrical machine comprising: A stator core in which a plurality of split cores are connected in an annular shape;
A plurality of connecting wires arranged in the axial direction corresponding to each phase and extending in the circumferential direction;
A terminal having the same shape, which is connected to each end of the coil in the split core and has a U-shaped portion that opens in one of the axial directions and through which the connecting conductor passes at different positions in the axial direction corresponding to the phases;
In the manufacturing method of the rotating electrical machine manufactured using
A bonding step in which a portion through which the connection conductor in the terminal passes is pressed from both side surfaces by a predetermined pressure bonding means;
A sealing step of closing the opening by pressing the portion on the opening side from the portion crimped in the joining step from both side surfaces by the pressure-bonding means;
Have
The said sealing process is performed with respect to the said terminal corresponding to the phase which the said connection conducting wire passes to the deepest position of the said U-shaped part at least among several phases, The manufacturing method of the rotary electric machine characterized by the above-mentioned.

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