Coil wire module, solder-integrated solder-jointed component, and method for manufacturing coil wire module

Abstract

To facilitate connection between coil wires.SOLUTION: A coil wire module in a rotating electric machine includes a plurality of coil wires provided in a core of a rotating electrical machine, and a solder hardening portion 40, each of the plurality of coil wires includes a connection end 17 exposed from the end of the core, and the solder hardening portion 40 is a portion formed by melting the solder in a solder hardening space S with at least two of the connection ends 17 of the plurality of coil wires being inserted into the solder hardening space S, and joining and hardening at least two of the connection ends 17.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a coil wire module. [Background technology]

[0002] Patent Document 1 discloses that the connection end of the rectangular conductor is inserted into a notch formed in the bus bar, and the bus bar and the rectangular conductor are then TIG (Tungsten Inert Gas) welded together, thereby connecting multiple rectangular conductors of the armature via the bus bar. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-148479 A Summary of the Invention [Problem to be solved by the invention]

[0004] According to the technique disclosed in Patent Document 1, the joint end of the rectangular conductor wire is inserted into the notch of the bus bar, and then the bus bar and the rectangular conductor wire are TIG welded together, making the connection work complicated.

[0005] Therefore, an object of the present disclosure is to make it easier to connect coil wires to each other. [Means for solving the problem]

[0006] The coil wire module of the present disclosure is a coil wire module for a rotating electric machine, comprising: a plurality of coil wires provided on a core in the rotating electric machine; and a solder hardening portion, each of the plurality of coil wires having a connection end exposed from an end of the core, and the solder hardening portion being a portion in which, with at least two of the connection ends of the plurality of coil wires inserted into a solder hardening space, solder melts in the solder hardening space to join and harden at least two of the connection ends.

[0007] In addition, the solder-integrated solder-joint component disclosed herein is a solder-integrated solder-joint component for joining at least two connection ends of a plurality of coil wires provided on a core in a rotating electric machine, and is a solder-integrated solder-joint component having a recess into which the at least two connection ends can be inserted, and solder arranged in the recess.

[0008] In addition, the manufacturing method for a coil wire module of the present disclosure includes preparing a solder-integrated solder-jointed component in which solder is arranged in a recess, inserting at least two connection ends of a plurality of coil wires provided on a core in a rotating electric machine into the recess, and melting the solder in the recess by heating to solder-connect the at least two connection ends within the recess. Effect of the Invention

[0009] According to the present disclosure, the coil wires can be easily connected to each other. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic perspective view showing a motor according to an embodiment. [Diagram 2] FIG. 2 is a perspective view showing a connection portion between two connection ends. [Diagram 3] FIG. 3 is a partial cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 4 is an exploded perspective view showing the coil wire module. [Diagram 5] FIG. 5 is a perspective view of the solder-jointed component as viewed from the coil wire side. [Figure 6] FIG. 13 is a diagram showing a state in which the connection end portion is inserted into the recess portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] [Description of the embodiments of the present disclosure] First, the embodiments of the present disclosure will be listed and described.

[0012] The coil wire module of the present disclosure is as follows.

[0013] (1) A coil wire module for a rotating electric machine, comprising: a plurality of coil wires provided on a core in the rotating electric machine; and a solder hardening portion, each of the plurality of coil wires having a connection end exposed from an end of the core, the solder hardening portion being a portion in which, with at least two of the connection ends of the plurality of coil wires inserted into a solder hardening space, solder melts in the solder hardening space to join and harden at least two of the connection ends.

[0014] With this coil wire module, the solder hardens in the solder hardening space. Melting At least two of the connection ends are then joined and hardened, thereby connecting at least two of the connection ends together, thereby facilitating the connection of the coil wires to each other.

[0015] (2) The coil wire module of (1) may further include a solder joint part having a recess into which a combination of at least two of the connection ends of the plurality of coil wires can be inserted, and the solder hardening part may join at least two of the connection ends within the recess. In this case, by storing solder in the recess and melting the solder with at least two of the connection ends inserted into the recess, the connection ends can be easily connected to each other.

[0016] (3) In the coil wire module of (2), a plurality of combinations of the at least two connection ends may be arranged at intervals along the circumferential direction of the core, and a plurality of the recesses may be formed in the solder joint component corresponding to each of the plurality of combinations of the at least two connection ends. In this case, since a plurality of recesses are formed in the solder joint component, when the solder joint component is brought closer to the coil wire, the plurality of combinations of the at least two connection ends are inserted into the recesses all at once.

[0017] (4) In the coil wire module of (2) or (3), the solder joint component may include a cap in which the recess is formed, and a holder in which a set recess capable of holding the cap is formed. In this way, by making the cap in which the recess is formed a separate component from the holder, the cap can be easily configured to be suitable for soldering. For example, by making the cap out of metal, it is easy to form the recess with a precision suitable for inserting and holding the at least two connection ends. In addition, it is easy to give the portion surrounding the recess heat resistance that can withstand melting of the solder.

[0018] (5) In the coil wire module of any one of (2) to (4), the solder-hardened portion may include a portion located between tip surfaces of the at least two connection ends and the innermost portion of the recess. This makes it possible to connect the at least two connection ends by the solder-hardened portion including the portion located in the innermost portion of the recess.

[0019] Further, the solder-integrated solder-jointed component of the present disclosure is as follows.

[0020] (6) A solder-integrated solder-joint component for joining at least two connection ends of a plurality of coil wires provided on a core in a rotating electric machine, the solder-integrated solder-joint component comprising a recess into which the at least two connection ends can be inserted, and solder arranged in the recess.

[0021] With this solder-integrated solder-jointed component, at least two connection ends of a plurality of coil wires are inserted into a recess, and in this state, the solder in the recess is heated and melted, whereby the at least two connection ends can be easily joined with solder.

[0022] A method for manufacturing a coil wire module according to the present disclosure is as follows.

[0023] (7) A method for manufacturing a coil wire module, comprising the steps of: preparing a solder-integrated solder-jointed component having solder disposed within a recess; inserting at least two connection ends of a plurality of coil wires provided on a core in a rotating electric machine into the recess; and melting the solder within the recess by heating to solder-connect the at least two connection ends within the recess.

[0024] With this, by inserting at least two connection ends into the recess and melting the solder in the recess by heating, the at least two connection ends can be easily soldered and connected in the recess.

[0025] [Details of the embodiment of the present disclosure] Specific examples of the coil wire module, solder joint component, and manufacturing method of the coil wire module of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0026] [Embodiment] Hereinafter, a coil wire module, a solder joint component, and a manufacturing method of the coil wire module according to the embodiment will be described. A coil wire module in a rotating electric machine is a portion in which coil wires in the rotating electric machine are connected to each other. For convenience of explanation, the overall configuration of a motor 10, which is an example of a rotating electric machine, will be described. Fig. 1 is a schematic perspective view showing the motor 10.

[0027] The motor 10 includes a stator 12 and a rotor 20. The motor 10 is, for example, a three-phase motor. In this embodiment, the rotor 20 rotates around a rotation axis X within the stator 12. The rotating electric machine may be a generator instead of an electric motor such as the motor 10.

[0028] The stator 12 is an armature and includes a stator core 14 and a plurality of coil wires 16. The stator core 14 includes a plurality of teeth. The plurality of teeth are provided so as to surround the rotation axis X. Around the rotation axis X, gaps are provided between the plurality of teeth.

[0029] A plurality of coil wires 16 are provided on the stator core 14. The coil wire 16 includes straight portions 16B arranged between the teeth so as to extend in a direction parallel to the rotation axis X, and connection ends 17 exposed from the ends of the stator core 14. At least two connection ends 17 are connected to each other on the axial outside of the stator core 14 so as to form a coil with one or more teeth as a core. FIG. 1 illustrates a state in which two connection ends 17 are connected in a plurality of sets above the stator core 14. At least two connection ends may also be connected to each other below the stator core 14 in FIG. 1. At least two coil wires 16 do not need to be connected in the same configuration on both ends outside the stator core 14. For example, below the stator core 14, two coil wires may be formed integrally and directly connected to each other. Also, below the stator core 14, two coil wires may be connected via a bus bar or the like formed of a metal plate material or the like.

[0030] A plurality of coil wires 16 are connected in a predetermined combination at one end and the other end of the stator core 14 to form a coil that generates a magnetic field for rotating the rotor 20. The coil wires 16 provided on the stator 12 may be wound in a distributed winding form or a concentrated winding form.

[0031] The rotor 20 includes a permanent magnet, and is rotatably disposed within the stator 12. The rotor 20 rotates about a rotation axis X due to a magnetic field generated by the stator 12.

[0032] A main body case 22 is provided so as to surround the periphery and the other end side of the stator 12. In addition, a cover 26 is provided so as to cover one end side of the stator 12.

[0033] Some ends of the coil wires 16 are drawn out from one end of the stator 12 and used as ends to be connected to an external power source, while the other ends of the coil wires 16 are drawn out from one end of the stator 12 and used as ends to be connected at a neutral point.

[0034] The coil wire module 28 in a rotating electric machine will be described in more detail below, focusing on the configuration for connecting the two connection ends 17. Fig. 2 is a perspective view showing the connection portion between the two connection ends 17. Fig. 3 is a partial cross-sectional view taken along line III-III in Fig. 2. Fig. 4 is an exploded perspective view showing the coil wire module 28. Four sets of connection portions are selectively depicted in Figs. 2 and 4.

[0035] The coil wire module 28 in the rotating electric machine includes the above-mentioned multiple coil wires 16 and a solder-hardened portion 40. In this embodiment, the coil wire module 28 further includes a solder-jointed component 30 having a recess 38. The solder-hardened portion 40 connects at least two coil wires 16 together within the recess 38. Each portion will be described in more detail.

[0036] The coil wire 16 is formed, for example, of a rectangular conductor whose cross section (a cross section in a plane perpendicular to the extending direction) is a rectangle that is long in one direction. The corners may be rounded. The coil wire 16 is formed of a metal such as copper or a copper alloy. The coil wire 16 includes a straight portion 16B and a connection end portion 17. The straight portion 16B is disposed in a groove between the teeth of the stator core 14. The straight portion 16B is formed in a straight line extending along the direction of the rotation axis X.

[0037] The connection end 17 is exposed from an end of the stator core 14 and extends toward the other connection end 17 to which it is to be connected. In this embodiment, coil wires 16 at different positions along the circumferential direction of a circle centered on the rotation axis X are connected to each other. For this reason, the connection end 17 of one of the two coil wires 16 to be connected to each other includes an inclined portion 17a that extends from the end of the stator core 14 toward the other coil wire 16 to which it is to be connected along the circumferential direction. The inclined portion 17a extends in a direction intersecting with the rotation axis X. The tip of the inclined portion 17a is inclined to the rotation axis X. direction A straight end 17b is provided that extends in the opposite direction from the stator core 14 along the circumferential direction of the coil wire 16. The connection end 17 of the other of the two coil wires 16 that are connected to each other includes an inclined portion 17a that, as it extends from the end of the stator core 14, extends in the circumferential direction toward the one coil wire 16 to which it is to be connected. direction A straight end 17b is provided that extends toward the opposite side to the stator core 14 along the inclined portion 17a. Of the two coil wires 16 that are connected to each other, the tip end of the inclined portion 17a and the straight end 17b are disposed at a middle (here, the center) position of the two coil wires 16 in the circumferential direction. The tip end of the inclined portion 17a and the straight end 17b of the two coil wires 16 can overlap in the radial direction of a circle centered on the rotation axis X. Note that the longitudinal direction in the cross section of the coil wire 16 may be along a tangential direction to the circumferential direction. In this case, the tip end of the inclined portion 17a and the straight end 17b can contact each other over a large area.

[0038] The outer periphery of the straight portion 16B may be coated with an insulating coating made of enamel, etc. The portion of the connection end 17 that comes into contact with the counterpart connection end 17 is in an exposed conductor state.

[0039] For example, an insulating coating made of enamel or the like may be formed on the entire coil wire 16, and the insulating coating may be removed only from the surface of the connection end 17 that comes into contact with the mating connection end 17. The insulating coating may be removed from the entire periphery of the connection end 17.

[0040] In this embodiment, a plurality of combinations of at least two connection ends 17 are arranged at intervals along the circumferential direction of the stator core 14.

[0041] In this embodiment, multiple combinations of at least two connection ends 17 are lined up along multiple turns in the circumferential direction of the stator core 14. Here, multiple combinations of at least two connection ends 17 are lined up along two annular lines, an inner annular line and an outer annular line. Multiple combinations of at least two connection ends 17 may be lined up along three or more annular lines.

[0042] At least two connection ends 17 aligned along the inner annular line and at least two connection ends 17 aligned along the outer annular line are provided at the same position in the circumferential direction of the stator core 14. In other words, at least two connection ends 17 aligned along the inner annular line and at least two connection ends 17 aligned along the outer annular line are aligned along the radial direction of the stator core 14.

[0043] At least two connection ends 17 aligned along the inner annular line and at least two connection ends 17 aligned along the outer annular line may be provided at different positions in the circumferential direction of the stator core 14. For example, at least two connection ends 17 aligned along the inner annular line and at least two connection ends 17 aligned along the outer annular line may be provided so as to be alternately positioned in the circumferential direction of the stator core 14.

[0044] The solder-hardened portion 40 is a portion formed by melting solder in the solder-hardening space S to join and harden at least two connection ends 17 when at least two connection ends 17 are inserted into the solder-hardening space S. Therefore, the solder-hardened portion 40 has a shape that is the same as or smaller than the inner circumferential surface and the rear surface of the recess 38 that defines the solder-hardening space S.

[0045] In this embodiment, the solder-hardening space S is a space formed in a recess 38 in the solder-jointed component 30. The solder-jointed component 30 will now be described. Fig. 5 is a perspective view of the solder-jointed component 30, as viewed from the coil wire 16 side. Fig. 5 shows the cap 36 and the solder 40B removed from the holder 32.

[0046] As shown in Figs. 1 to 5, the solder joint component 30 has a recess 38 into which a combination of at least two connection ends 17 to be connected to each other can be inserted. The recess 38 may be set to a size that allows the combination of at least two connection ends 17 to be press-fitted or inserted without play. That is, the recess 38 may be set to a size that is the same as or smaller (slightly smaller within a range that allows press-fitting) than the combination of at least two connection ends 17 in the overlapping direction of the combination of at least two connection ends 17 and in a direction perpendicular to the overlapping direction. This makes it easier for the at least two connection ends 17 to be kept in contact with each other when inserted into the recess 38.

[0047] In addition, since at least two connection ends 17 are ultimately joined by solder hardened portion 40, at least two connection ends 17 may be inserted into recess 38 with a gap provided relative to the inner circumference of recess 38.

[0048] The solder-hardened portion 40 joins at least two of the connection ends in the recess 38. For example, the solder-hardened portion 40 may include a portion 40a located between the tip surfaces of the at least two connection ends 17 and the innermost portion of the recess 38. In this case, the solder-hardened portion 40 electrically connects at least two connection ends 17 by joining the portion 40a to the tip surfaces of the at least two connection ends 17. The solder-hardened portion 40 may include a portion 40b interposed between the at least two connection ends 17. In this case, the solder-hardened portion 40 electrically connects at least two connection ends 17 by joining the portion 40b to the opposing surfaces of the at least two connection ends 17. Note that the gap between the at least two connection ends 17 is exaggerated in FIG. 3. In reality, the gap between the connection ends 17 is very small, or there may be a gap only in a portion where the connection ends 17 face each other.

[0049] The solder hardened portion 40 is bonded to the surfaces of the at least two connection ends 17, thereby preventing the at least two connection ends 17 from separating. In this respect, the solder hardened portion 40 can keep the at least two connection ends 17 in a mechanically bonded state. However, the at least two connection ends 17 are also kept from separating from each other by being inserted into the recess 38.

[0050] In this embodiment, the solder-jointed component 30 is formed in an annular shape along an annular line on which multiple combinations of at least two connection ends 17 are arranged. In a plan view, the width of the solder-jointed component 30 in the radial direction of the stator core 14 is formed to be larger than the width that includes the two annular lines.

[0051] In the solder-joint component 30, a plurality of recesses 38 are formed corresponding to each of a plurality of combinations of at least two connection ends 17. More specifically, the plurality of recesses 38 are arranged at intervals along the circumferential direction of the stator core 14. The plurality of recesses 38 are also arranged along the outer circumferential annular line and the inner circumferential annular line.

[0052] Therefore, when the solder joint component 30 is brought closer towards the connection end 17 of the coil wire 16, multiple combinations of at least two connection ends 17 can be inserted collectively into the corresponding multiple recesses 38. It is not essential that multiple recesses 38 are formed in the solder joint component 30, and the solder joint component may have one recess formed.

[0053] The solder joint component 30 also includes a cap 36 in which a recess 38 is formed, and a holder 32 in which a set recess 34 capable of holding the cap 36 is formed.

[0054] The cap 36 is formed in a cylindrical shape with one axial end open and the other axial end closed.

[0055] The holder 32 is formed in an annular shape along an annular line on which multiple combinations of at least two connection ends 17 are arranged. In a plan view, the width of the solder-jointed component 30 in the radial direction of the stator core 14 is formed to be larger than the width that includes the two annular lines.

[0056] The set recesses 34 are formed in the holder 32 at positions where the recesses 38 are to be formed, i.e., at positions corresponding to each of a plurality of combinations of at least two connection ends 17. Here, the set recesses 34 are bottomed recesses that open to one side. The set recesses 34 may be holes that penetrate the holder 32. In this case, the inner peripheral surface of the set recesses 34 may be formed with positioning protrusions or steps that can position the cap 36 in its axial direction.

[0057] The inner peripheral surface of the setting recess 34 is formed into a shape corresponding to the outer peripheral surface of the cap 36. At least a portion of the cap 36 is accommodated in the setting recess 34 with the other closed end of the cap 36 positioned on the bottom side of the setting recess 34. This allows the cap 36 to be supported in a fixed position by the holder 32. In this embodiment, the end of the cap 36 on the opening side protrudes from the holder 32. The end of the cap 36 on the opening side may be continuous and flush with the surface of the holder 32, or may be located at a position recessed from the surface of the holder 32.

[0058] The cap 36 and the holder 32 may be made of any material. It is preferable that the cap 36 has heat resistance capable of withstanding the molten solder. For example, the cap 36 may be made of a material having a higher melting point than the melting point of the solder hardened portion 40, such as a metal such as iron.

[0059] By forming the cap 36 from a metal, it is easy to improve the dimensional accuracy of the recess 38 to the extent that at least two connection ends 17 can be press-fitted into the recess 38 or inserted without play. In addition, it is possible to withstand the heat of the molten solder and maintain the shape of the recess 38. Therefore, it is easy to maintain the shape of the molten solder constant while maintaining at least two connection ends 17 within the recess 38.

[0060] It is sufficient that the holder 32 can maintain a constant positional relationship between the caps 36 at least until at least two connection ends 17 are inserted into the recesses 38. From this viewpoint, the holder 32 may be made of resin.

[0061] For example, the holder 32 may be a resin part molded with the cap 36 as an insert part. The holder 32 may also be a part molded with a die to have a setting recess 34, and the cap 36 may be press-fitted into the setting recess 34 after molding with the die.

[0062] Before forming the hardened solder portion 40, the solder 40B may be disposed in the recess 38. Any configuration may be used to dispose the solder 40B in the recess 38. For example, the solder 40B may be a paste-like solder disposed deep inside the recess 38. The solder 40B may be a solid solder that is pressed into the recess 38.

[0063] A solder-joint component 30 to which the solder 40B is set may be understood to be an integral solder-joint component 30B.

[0064] The solder 40B melts and hardens to form the solder hardened portion 40.

[0065] A manufacturing example of the coil wire module 28 will now be described.

[0066] First, the solder-integrated solder-joint component 30B having the solder 40B disposed in the recess 38 is prepared.

[0067] 6, at least two connection ends 17 of the multiple coil wires 16 provided on the stator core 14 are inserted into the recesses 38. Here, multiple combinations of at least two connection ends 17 are inserted into the corresponding recesses 38 at once. In this state, at least two connection ends 17 are kept butted together in each recess 38. Also, in each recess 38, solder 40B is sandwiched between the tip surfaces of the at least two connection ends 17 and the innermost part of the recess 38.

[0068] In this state, the solder 40B is melted by any method.

[0069] For example, a large current may be temporarily applied to the coil wire 16 to melt the solder 40B with heat generated by the resistance of the contact portions of at least two connection ends 17. In this case, the heat of the solder 40B is transferred to the holder 32 via the cap 36. This eliminates the need to make the holder 32 more heat-resistant, and allows for a wider range of material choices for the holder 32.

[0070] Also, for example, the coil wire 16 and the solder-integrated solder-jointed component 30B may be placed in a heating furnace and the entire assembly may be temporarily heated to melt the solder 40B.

[0071] The molten solder can fill the gap between the at least two connection ends 17 and the recess 38 to form the above-mentioned portion 40a. Also, depending on the solder wettability of the surfaces of the at least two connection ends 17, the molten solder can also enter the gap between the at least two connection ends 17 to form the above-mentioned portion 40b. As a result, the molten solder becomes the solder hardened portion 40, and the at least two connection ends 17 can be solder-connected in the recess 38.

[0072] According to the coil wire module 28 thus configured, the solder 40B is hardened in the solder hardening space S in the recess 38. Melting At least two connection ends 17 are joined and hardened to form a solder-hardened portion 40. Since the at least two connection ends 17 are connected by this solder-hardened portion 40, the coil wires 16 can be easily connected to each other. Furthermore, since the at least two connection ends 17 are inserted into the recess 38, even if the positional accuracy between the at least two connection ends 17 is poor, the at least two connection ends 17 are soldered together while being positionally restricted within the recess 38. Therefore, the connection work can be performed while absorbing the positional tolerance between the at least two connection ends 17.

[0073] Furthermore, the coil wire module 28 includes a solder joint component 30 having a recess 38, and the solder hardening portion 40 joins at least two connection ends 17 within the recess 38. For this reason, by storing solder 40B within the recess 38 and melting the solder 40B with at least two connection ends 17 inserted into the recess 38, the connection ends 17 can be easily connected to each other.

[0074] Furthermore, since the solder joint component 30 has a plurality of recesses 38 formed therein, when the solder joint component 30 is brought closer to the coil wire 16, a plurality of combinations of at least two connection ends 17 are inserted collectively into the corresponding recesses 38. In each recess 38, at least two connection ends 17 can be joined by the hardened solder portion 40, and therefore a plurality of combinations of at least two connection ends 17 can be easily joined.

[0075] Furthermore, by making the cap 36 in which the recess 38 is formed a separate part from the holder 32, the cap 36 can be easily configured to be suitable for soldering. For example, by making the cap 36 out of metal, the recess 38 can be easily formed with a precision suitable for inserting and holding at least two connection ends 17. Furthermore, the portion surrounding the recess 38 can be easily provided with heat resistance sufficient to withstand melting of the solder.

[0076] Furthermore, since the solder-hardened portion 40 includes the portion 40a located at the deepest portion of the recess 38, at least two connection ends 17 can be easily and reliably connected at the deepest portion of the recess 38.

[0077] Furthermore, by using the above-mentioned solder-integrated solder-joined component 30B, at least two connection ends 17 can be held together within the recess 38, while the at least two connection ends 17 can be easily joined by the solder 40B within the recess 38.

[0078] [Variations] After at least two connection ends 17 are joined by the solder hardened portion 40 in the recess 38, the cap 36 may be removed from the holder 32 while the cap 36 remains attached to the ends of the at least two connection ends 17. In this case, the cap 36 may be fitted into the set recess 34 to an extent that it can be inserted and removed.

[0079] For example, the motor 10 may be used with the cap 36 fitted in the holder 32, and the holder 32 may be removed during maintenance or the like. The motor 10 may also be used with the holder 32 removed. In this case, for example, if the entire cap 36 or the outer periphery thereof is formed from an insulating material such as resin, the cap 36 can more reliably maintain an insulating state between the combination of at least two connection ends 17.

[0080] Also, as long as the cap 36 is attached to at least two connection ends 17, the cap 36 may be made of a material that has good wettability with solder.

[0081] When the motor 10 is used or during maintenance, the cap 36 may be removed from the at least two connection ends 17 and the solder hardened portion 40. In this case, the cap 36 may be made of a material that has poor wettability with solder. The cap 36 may be removed from the at least two connection ends 17 and the solder hardened portion 40 together with the holder 32.

[0082] The configurations described in the above embodiment and modifications can be combined as appropriate as long as they are not mutually inconsistent. [Explanation of symbols]

[0083] 10 Motor (rotating electric machine) 12 Stator 14 Stator core (core) 16 Coil wire 16B Straight section 17 Connection end 17a Slope 17b Straight end 20 Rotors 22 Main unit case 26 Cover 28 Coil Wire Module 30 Soldered parts 30B Solder-integrated solder joint parts 32 Holder 34 Set recess 36 Cap 38 Recess 40 Solder hardened part 40B solder 40a: A portion located between the tip surface of the connection end and the innermost part of the recess 40b Part interposed between the connection ends S Solder hardening space

Claims

1. A coil wire module for a rotating electric machine, A plurality of coil wires provided in a core of the rotating electric machine; A solder hardened portion; Equipped with Each of the coil wires has a connection end exposed from an end of the core, the solder hardened portion is a portion formed by melting solder in a solder hardening space to join and harden at least two of the connection ends of the plurality of coil wires in a state where the at least two of the connection ends are inserted into the solder hardening space, a solder joint component having a recess into which at least two combinations of the connection ends of the plurality of coil wires can be inserted; the recess is a bottomed recess that opens to one side, and is defined by an inner circumferential surface that entirely surrounds at least two combinations of the connection ends of the plurality of coil wires, and a back surface that is opposite to the one side, The coil wire module, wherein the solder hardened portion joins at least two of the connection ends within the recess while filling the recess.

2. A coil wire module as claimed in claim 1, A plurality of combinations of the at least two connection ends are arranged at intervals along the circumferential direction of the core, A coil wire module, wherein the recesses are formed in the solder joint component in a plurality of positions corresponding to the plurality of combinations of the at least two connection ends.

3. A coil wire module according to claim 1 or claim 2, The solder joint component includes a cap having the recess formed therein, and a holder having a setting recess formed therein capable of holding the cap.

4. A coil wire module according to any one of claims 1 to 3, A coil wire module, wherein the solder hardened portion includes a portion located between tip surfaces of the at least two connection ends and an innermost portion of the recess.

5. A solder-integrated solder-joined component for joining at least two connection ends of a plurality of coil wires provided in a core of a rotating electric machine, comprising: a recess into which the at least two connection ends can be inserted; a solder disposed within the recess; Equipped with The recess is a bottomed recess that opens to one side, and is defined by an inner surface that entirely surrounds at least two combinations of the connection ends of the multiple coil wires, and a rear surface opposite the one side, which is a solder-integrated solder-joint component.

6. preparing a solder-integrated solder-jointed component having solder disposed in a recess; Here, the recess is a bottomed recess that opens to one side and is defined by an inner circumferential surface and a back surface opposite to the one side, At least two connection ends of a plurality of coil wires provided on a core in a rotating electric machine are inserted into the recess so that the inner circumferential surface entirely surrounds a combination of at least two of the connection ends of the plurality of coil wires; A method for manufacturing a coil wire module, comprising: melting the solder in the recess by heating; and soldering the at least two connection ends within the recess using the solder that has filled the recess and hardened.

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