JP2017085843A - Stator, motor, and manufacturing method of stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator and a motor which make breaking of a conducting wire pulled out from a coil and failure in solder joint of the conducting wire to a terminal pin less likely to occur.SOLUTION: A stator for a motor includes: a coil; a conducting wire 34 having a core wire 340 and an insulation member 341 covering the core wire and pulled out from the coil; a terminal pin 33 around which an end part of the conducting wire is wound; and solder 37 which electrically connects the conducting wire with the terminal pin. A portion of the conducting wire, which is wound around the terminal pin, has an exposed part 35 at which the core wire is exposed; and a cover part 36 at which the core wire is covered by the insulation member. The exposed part 35 and the terminal pin 33 are electrically connected by the solder 37.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a stator, a motor, and a stator manufacturing method.

  Patent Document 1 discloses a method of peeling off an insulation coating at a winding end of a winding wound around a stator of an electric motor.

  In the peeling method disclosed in Patent Document 1, first, the winding end is passed through the center of the cutting blade, the cutting blade rotating device, and the cutting blade moving device. The winding end is connected to a tension applying device, and tension is applied to the winding end by the tension applying device. Next, the cutting blade is rotated by the cutting blade rotating device, and the cutting blade moving device is moved in the same direction as the tension application direction. Thereby, the insulation coating of the winding end is peeled off. Note that the winding from which the insulation coating has been peeled is soldered to the terminal.

JP 2013-187926 A

  According to the method of Patent Document 1, the entire insulation coating in the circumferential direction of the winding end is scraped off by the cutting blade rotating around the winding. In this method, since the entire circumferential direction of the winding is in contact with the cutting blade, the possibility that the core portion of the winding is cut more than necessary is increased. If the core wire portion is cut more than necessary, the wire breakage tends to occur.

  The winding end from which the insulation coating has been removed is wound around, for example, a terminal pin. When the method of Patent Document 1 is used, strict dimensional control of the range in which the insulating coating is removed is required when winding the winding end portion around the terminal pin. This dimensional management increases the number of work steps. For example, when the core wire material of the winding is aluminum, it is preferable to perform solder bonding as soon as possible after removing the insulation coating in order to suppress oxidation of the core wire. When using the method of patent document 1, the process which winds a coil | winding end part around a terminal pin after removing the insulation coating of a coil | winding end part and performing a solder joint enters. For this reason, there is a high possibility that bonding failure occurs in the solder bonding process due to oxidation of the core wire.

  In view of the above points, an object of the present invention is to provide a highly reliable stator and motor. In particular, it is an object of the present invention to provide a stator and a motor that are less likely to fail in disconnection of a lead wire drawn from a coil and soldering of the lead wire to a terminal pin. Another object of the present invention is to provide a stator manufacturing method capable of reducing the work load.

  An exemplary stator of the present invention is a stator for a motor, and includes a coil, a core wire, and an insulating member that covers the core wire, and a lead wire drawn from the coil and an end portion of the lead wire are wound. Terminal pins, and solder for electrically connecting the conductive wires and the terminal pins. The portion of the conductive wire wound around the terminal pin has an exposed portion where the core wire is exposed and a covering portion where the core wire is covered with the insulating member. The exposed portion and the terminal pin are electrically connected by the solder.

  The exemplary motor of the present invention has the exemplary stator of the present invention described above.

  In a portion wound around a terminal pin of a conducting wire having a core wire and an insulating member covering the core wire, an exemplary stator manufacturing method according to the present invention includes the core wire on a part of a covering portion that covers the core wire with the insulating member. And a second step of soldering the exposed portion and the terminal pin to each other.

  According to the exemplary present invention, a highly reliable stator and motor can be provided. In addition, according to the exemplary present invention, it is possible to provide a method of manufacturing a stator that can reduce the work load.

FIG. 1 is a schematic cross-sectional view showing a configuration of a motor according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing the configuration of the stator according to the embodiment of the present invention. FIG. 3 is an image diagram schematically showing the configuration of the terminal pins and their surroundings included in the stator according to the embodiment of the present invention. FIG. 4 is a cross-sectional view of the image diagram shown in FIG. FIG. 5 is an enlarged view showing a portion surrounded by a broken line in FIG. FIG. 6 is a schematic plan view of the developed stator as viewed from above. FIG. 7 is a schematic plan view of the developed stator of FIG. 6 viewed from the side. FIG. 8A is a schematic diagram for explaining the stator manufacturing method according to the first embodiment of the present invention. FIG. 8B is a schematic diagram for explaining the stator manufacturing method according to the first embodiment of the present invention. FIG. 8C is a schematic view for explaining the stator manufacturing method according to the first embodiment of the present invention. FIG. 9A is a schematic diagram for explaining a stator manufacturing method according to the second embodiment of the present invention. FIG. 9B is a schematic diagram for explaining the stator manufacturing method according to the second embodiment of the present invention. FIG. 9C is a schematic diagram for explaining the stator manufacturing method according to the second embodiment of the present invention. FIG. 10 is a schematic view showing a modification of the stator according to the embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In the present specification, for the sake of convenience, the direction of the central axis A (see FIG. 1) of the motor will be described as the vertical direction. However, the vertical direction is determined for convenience of explanation and does not need to coincide with the direction of gravity. The direction of the central axis A of the motor is simply referred to as “axial direction”, and the radial direction and the circumferential direction around the central axis A of the motor are simply referred to as “radial direction” and “circumferential direction”. Similarly, with regard to the stator, the directions that coincide with the axial direction, radial direction, and circumferential direction of the motor when incorporated in the motor are simply referred to as “axial direction”, “radial direction”, and “circumferential direction”. To do.
<1. Motor configuration>

  First, a schematic configuration of a motor according to an exemplary embodiment of the present invention will be described. FIG. 1 is a schematic cross-sectional view showing a configuration of a motor 1 according to an embodiment of the present invention. FIG. 1 is a cross-sectional view taken along a cut surface including the central axis A of the motor 1. The motor 1 has a rotor 2 and a stator 3. The motor 1 has a resin casing 4 that houses the rotor 2 and the stator 3. The casing 4 has a casing body 4a and a casing cover 4b. The casing body 4a is a bottomed cylindrical resin molded product that opens upward in the axial direction. The opening of the casing body 4 a is an insertion port for the rotor 2. The casing cover 4b is a lid that closes the rotor insertion opening.

  The rotor 2 having a permanent magnet rotates about the rotation axis A. A shaft 5 is fixed to the rotation center of the rotor 2. The shaft 5 is a substantially cylindrical member extending in the axial direction. The shaft 5 is supported by two bearings 6 a and 6 b arranged above and below the rotor 2, and rotates together with the rotor 2. The lower bearing 6a is held by the casing body 4a, and the upper bearing 6b is held by the casing cover 4b. The upper end portion of the shaft 5 protrudes above the casing 4. The protruding portion of the shaft 5 is used as an output shaft.

  The stator 3 is an armature of the motor 1. The substantially annular stator 3 is disposed outside the rotor 2 in the radial direction and is fixed to the casing body 4a. Specifically, the stator 3 is integrated with the casing body 4a by insert molding. The stator 3 is embedded in the casing body 4a with at least a part of its inner peripheral surface exposed. The exposed inner peripheral surface of the stator 3 faces the outer peripheral surface of the rotor 2 through a gap.

The motor 1 has a circuit board 7 disposed in the casing 4. The circuit board 7 has an electronic circuit for supplying a current to the coil 31 included in the stator 3. In detail, the circuit board 7 is arrange | positioned in the upper part of the internal space of the casing main body 4a. The circuit board 7 is covered with a casing cover 4b. A through hole 7 a through which the upper portion of the rotor 2 and the shaft 5 are passed is provided at the center of the circuit board 7.
<2. Structure of stator>

  The configuration of the stator 3 for the motor 1 according to an exemplary embodiment of the present invention will be described in more detail. FIG. 2 is a schematic perspective view showing the configuration of the stator 3 according to the embodiment of the present invention. With reference to FIGS. 1 and 2, the stator 3 includes a stator core 30, a coil 31, an insulator 32, and a terminal pin 33.

  The stator core 30 is a laminated steel plate in which magnetic steel plates such as silicon steel plates are laminated in the axial direction. The stator core 30 includes a substantially annular core back 301 and a plurality of teeth 302 protruding radially inward from the core back 301. In this example, the number of teeth 302 is twelve, but this is only an example and may be changed as appropriate.

  The coil 31 is wound around each tooth 302 of the stator core 30 via an insulator 32. When a drive current is supplied to the coil 31, a radial magnetic flux is generated in the teeth 302, which is a magnetic core. Thereby, circumferential torque is generated in the rotor 2, and the rotor 2 and the shaft 5 rotate around the rotation axis A.

  The insulator 32 is a resin insulating member that electrically insulates the stator core 30 and the coil 31. The insulator 32 is integrated with the stator core 30 by insert molding of the stator core 30. A plurality of support portions 321 that open in the axial direction are formed on the top of the insulator 32.

The terminal pin 33 is supported by a support portion 321 provided on the top of the insulator 32. The terminal pin 33 is press-fitted into the opening of the support portion 321, for example. The material of the terminal pin 33 is not particularly limited. For example, the terminal pin 33 is made of phosphor bronze plated with nickel. A conducting wire 34 drawn from the coil 31 is wound around the terminal pin 33. Details of this point will be described later. In the present embodiment, the terminal pins 33 are arranged at four locations corresponding to the three phases U-phase, V-phase, and W-phase and the common. However, this is only an example, and the number of terminal pins 33 may be changed as appropriate.
<3. Detailed configuration around terminal pin>

  FIG. 3 is an image diagram schematically showing the configuration of the terminal pin 33 and its periphery included in the stator 3 according to the embodiment of the present invention. FIG. 4 is a cross-sectional view of the image diagram shown in FIG. FIG. 5 is an enlarged view showing a portion B surrounded by a broken line in FIG. 4 in an enlarged manner. Hereinafter, the configuration around the terminal pin 33 of the stator 3 will be described with reference to FIGS. 3 to 5 in addition to FIGS. 1 and 2.

  The stator 3 has a conducting wire 34 drawn out from the coil 31. The conducting wire 34 includes a core wire 340 and an insulating member 341 that covers the core wire 340 (see FIG. 5). The core wire 340 is an aluminum wire in this embodiment. When aluminum is used as the material of the core wire 340, for example, the weight of the motor can be reduced as compared with the case of using a copper wire as the material of the core wire. However, this is merely an example, and the core wire 340 may be formed using a conductor other than aluminum. In the present embodiment, the main component of the insulating member 341 is a polyester resin. When a polyester resin is used, the heat resistance and solvent resistance of the conducting wire 34 can be improved. However, this is merely an example, and the main component of the insulating member 341 may be a component other than the polyester resin.

  The stator 3 has a terminal pin 33 around which the end of the conducting wire 34 is wound. Referring to FIG. 5, the portion of conductive wire 34 wound around terminal pin 33 has an exposed portion 35 where core wire 340 is exposed, and a covering portion 36 where core wire 340 is covered with insulating member 341. Specifically, the exposed portion 35 is a portion where the core wire 340 is exposed without being covered with the insulating member 341. In addition, the stator 3 includes solder 37 that electrically connects the conductive wire 34 and the terminal pin 33. In the stator 3, the exposed portion 35 and the terminal pin 33 are electrically connected by solder 37. Specifically, the solder 37 is in contact with the exposed core wire 340 of the exposed portion 35. Further, the solder 37 is in contact with the terminal pin 33. Thereby, the electrical connection of the conducting wire 34 and the terminal pin 33 is ensured.

  In the present embodiment, in the portion wound around the terminal pin 33, the outer peripheral portion of the conducting wire 34 has an exposed portion 35 and a covering portion 36 adjacent to the exposed portion 35. Specifically, the exposed portion 35 and the covering portion 36 are adjacent to each other in the circumferential direction of the conducting wire 34. That is, in the part wound around the terminal pin 33, the conducting wire 34 is not in a state where the core wire 340 is exposed in the entire circumferential direction. Moreover, in this embodiment, the coating | coated part 36 is located in the location where the conducting wire 34 and the terminal pin 33 are contacting. According to the configuration of the present embodiment, for example, the exposed portion 35 can be formed after the conducting wire 34 is wound around the terminal pin 33. Details of the process of forming the exposed portion 35 on a part of the covering portion 36 of the conducting wire 34 will be described later.

  The conducting wire 34 is wound around the terminal pin 33 a plurality of times. More specifically, the conductive wire 34 is wound around the terminal pin 33 a plurality of times with a gap 38 in the longitudinal direction. In the present embodiment, the conducting wire 34 is wound around the terminal pin 33 five times, but this is merely an example. The number of times of winding the conducting wire 34 around the terminal pin 33 may be one time, or may be multiple times other than five times.

Moreover, the conducting wire 34 may be wound around the terminal pin 33 without a gap. However, the conductive wire 34 is preferably wound a plurality of times with a gap 38 as described above. According to this, the solder 37 is easily filled in the gap 38. In the present embodiment, the solder 37 is filled in the gap 38 (see FIGS. 4 and 5). When the solder 37 is filled in the gap 38, the contact area between the solder 37 and the terminal pin 33 can be increased in a range where the conductive wire 34 of the terminal pin 33 is wound. For this reason, it becomes easy to ensure electrical connection between the exposed portion 36 and the terminal pin 33.
<4. Manufacturing method of stator>

  Next, a method for manufacturing the stator 3 according to an exemplary embodiment of the present invention will be described. FIG. 6 is a schematic plan view of the developed stator 8 as seen from above. FIG. 7 is a schematic plan view of the developed stator 8 of FIG. 6 viewed from the side. The development stator 8 is formed into an annular stator by being bent into an annular shape. The stator 3 of the present embodiment is obtained by producing the developed stator 8 first and bending the created developed stator 8.

  In manufacturing the development stator 8, a linear core in which magnetic steel plates are laminated in the axial direction is prepared. The linear core includes a linear core back 301 and a plurality of teeth 302 protruding from side surfaces substantially parallel to the axial direction of the linear core back 301. For example, the insulator 32 is attached to the linear core by insert molding. A conductive wire 34 is wound around each of the teeth 302 from above the insulator 32 to obtain the coil 31. The end portion of the conducting wire 34 drawn out from the coil 31 is wound around the terminal pin 33, and an electrical connection between the conducting wire 34 and the terminal pin 33 is obtained using the solder 37. As a result, the development stator 8 is completed. The development stator 8 is bent into an annular shape with a plurality of teeth 302 facing radially inward. And the stator 3 is obtained by joining the both ends of the expansion | deployment stator 8. FIG. For joining both ends, for example, welding or caulking is used.

  Here, the process with respect to the terminal pin 33 in the edge part of the conducting wire 34 pulled out from the coil 31 is demonstrated in detail. In the part wound around the terminal pin 33 of the conducting wire 34, the manufacturing method of the stator 3 has the following 1st process and 2nd process. The first step is a step of forming the exposed portion 35 where the core wire 340 is exposed in a part of the covering portion 36 that covers the core wire 340 with the insulating member 341. The second process is a process of soldering the exposed portion 35 and the terminal pin 33 together.

Through the first step, the conductive wire 34 having the exposed portion 35 and the covering portion 36 adjacent to the exposed portion 35 is formed on the outer peripheral portion of the conductive wire 34. Specifically, the exposed portion 35 and the covering portion 36 are adjacent to each other in the circumferential direction of the conducting wire 34. Soldering in the second step is preferably performed using a soldering apparatus (not shown). However, this is merely an example, and the soldering in the second step may be performed manually using a soldering iron. A plurality of methods can be adopted for the first step. Hereinafter, two embodiments will be exemplified.
<4-1. First Embodiment>

  8A to 8C are schematic views for explaining the stator manufacturing method according to the first embodiment of the present invention. The stator manufacturing procedure proceeds in the order of FIGS. 8A, 8B, and 8C. With reference to FIGS. 8A and 8B, the conducting wire 34 drawn from the coil 31 is wound around the terminal pin 33 supported by the support portion 321. The conducting wire 34 is wound a predetermined number of times with a gap in the longitudinal direction of the terminal pin 33. The predetermined number of times may be determined as appropriate. The winding of the conducting wire 34 may be performed manually or an apparatus may be used.

  FIG. 8A shows a state in the middle of winding the conducting wire 34 around the terminal pin 33. FIG. 8B shows a state where the winding of the conducting wire 34 around the terminal pin 33 is completed. When the winding of the conducting wire 34 around the terminal pin 33 is completed, the conducting wire 34 may be temporarily fixed to the terminal pin 33, and the tip side of the conducting wire 34 that is not wrapped around the terminal pin 33 may be cut. However, in this embodiment, even if winding of the conducting wire 34 around the terminal pin 33 is completed, the conducting wire 34 is not cut. The conducting wire 34 is in a state where the tip side is pulled and tension is applied. In FIG. 8B and FIG. 8C, the description of the tip side that is not wound around the terminal pin 33 of the conducting wire 34 is omitted.

  The first step is performed after the conducting wire 34 is wound around the terminal pin 33. Specifically, referring to FIG. 8C, in the first step, the terminal pin 33 around which the conductive wire 34 is wound is inserted into the first cylindrical member 90 in which the peeling portion 901 is provided. Is done. And in the said 1st process, the 1st cylindrical member 90 is rotated in the state which the peeling part 901 contacted a part of conducting wire 34. FIG. In FIG. 8C, the first tubular member 90 is rotated counterclockwise. The rotation direction of the first cylindrical member 90 is not limited to the counterclockwise direction, and may be the clockwise direction.

  The peeling part 901 is a cutting blade in this embodiment. The cutting blade extends along the axial direction of the first cylindrical member 90. Although there may be one cutting blade, a plurality of cutting blades may be provided. In this embodiment, there are a plurality of cutting blades. However, this is merely an example, and the peeling portion 901 may be, for example, a brush or a file. When the peeling part 901 is a brush or a file, these may be provided in a wide range of the inner periphery of the first cylindrical member 90. The rotation of the first cylindrical member 90 is automatically performed using a dedicated rotating device (not shown). The first cylindrical member 90 is rotated around the axis C of the cylindrical member. In addition, rotation of the 1st cylindrical member 90 may be performed manually depending on the case.

  Due to the rotation of the first tubular member 90, the insulating member 341 is removed at a location where it comes into contact with the peeling portion 901 of the conducting wire 34. For this reason, an exposed portion 35 where the core wire 340 is exposed is formed on a part of the covering portion 36 of the conducting wire 34. In this embodiment, for example, as shown in FIG. 5, the insulating member 341 remains on the conductive wire 34 on the side in contact with the terminal pin 33. On the other hand, the exposed portion 35 is formed by removing the insulating member 341 on the outer surface side not in contact with the terminal pin 33.

  When the exposed portion 35 is formed on a part of the covering portion 36, the tip side of the conducting wire 34 that is not wound around the terminal pin 33 is cut, and the second step is executed. Thereby, the process with respect to the terminal pin 33 of the conducting wire 34 pulled out from the coil 31 is completed.

  According to the present embodiment, the exposed portion 35 in which the core wire 340 is exposed at a part of the conductive wire 34 is formed in the portion of the conductive wire 34 that is wound around the terminal pin 33. Then, the other part becomes the covering part 36 in which the core wire 340 is covered with the insulating member 341. More specifically, the insulating member 341 in the entire circumferential direction of the conducting wire 34 is not scraped off, and the insulating member 341 remains in a part of the conducting wire 34 in the circumferential direction. For this reason, the possibility that the core wire 340 is cut more than necessary can be reduced as compared with the conventional example in which the insulation coating in the entire circumferential direction of the conducting wire 34 is cut off. That is, the possibility of disconnection can be reduced.

  For example, the PEW (Polyester Enameled Wire) specification conductor 34 is excellent in heat resistance and solvent resistance. For this reason, when the conducting wire 34 is a PEW specification conducting wire, it is difficult for the insulating member 341 to be removed by heat of solder or the like. Therefore, it is necessary to remove the insulating member 341 of the conductive wire 34 by, for example, cutting or polishing. Even in such a case, according to the present embodiment, the possibility of the core wire 340 being cut can be reduced, and the probability of occurrence of disconnection can be reduced. Note that the PEW specification conducting wire 34 refers to a conducting wire in which the main component of the insulating member 341 is a polyester resin.

Further, according to the present embodiment, it is not necessary to particularly perform dimensional management in a range where the insulating member 341 is removed. For this reason, a work burden can be reduced. Furthermore, in this embodiment, it is possible to perform soldering quickly after removing the insulating member 341. Specifically, after the insulating member 341 is removed, soldering can be performed quickly without performing the step of winding the conductive wire 34 around the terminal pin 33. For this reason, the soldering operation can be performed while suppressing the oxidation of the core wire 340. As a result, it is possible to reduce the possibility that a bonding failure between the exposed portion 35 and the terminal pin 33 occurs in the solder bonding step (the second step).
<4-2. Second Embodiment>

  FIG. 9A to FIG. 9C are schematic views for explaining the stator manufacturing method according to the second embodiment of the present invention. The stator manufacturing procedure proceeds in the order of FIGS. 9A, 9B, and 9C. In the second embodiment, the first step is performed while winding the conducting wire 34 around the terminal pin 33.

  In the first step, referring to FIG. 9A, first, the terminal pin 33 is inserted into the second cylindrical member 91 provided with the peeling portion 901 at the tip. The peeling part 901 is a cutting blade in this embodiment. However, the peeling part 901 may be a brush or a file, for example. The tip of the second cylindrical member 91 is brought close to the vicinity of the base of the terminal pin 33 supported by the support portion 321.

  Still referring to FIG. 9A, in the first step, the conducting wire 34 is disposed on the outer surface of the second cylindrical member 91 along the axial direction. Further, the conducting wire 34 is sandwiched between the peeling portion 901 and the outer surface of the second cylindrical member 91. The conducting wire 34 is a conducting wire drawn from the coil 31. Further, a tension is applied in the axial direction of the second cylindrical member 91 to the conducting wire 34 sandwiched between the peeling portion 901 and the outer surface of the second cylindrical member 91. The tension is adjusted to such an extent that the conducting wire 34 is not broken.

  Next, referring to FIG. 9B, in the first step, the second cylindrical member 91 is rotated and the tip portion moves along the axial direction in a direction away from the root of the terminal pin 33. Is done. The axial direction is the axial direction of the second cylindrical member 91. In FIG. 9B, the second cylindrical member 91 rises upward while being rotated counterclockwise about the axis D. The rotation and movement of the second cylindrical member 91 is performed by a dedicated rotational movement device (not shown). The rotation direction of the second cylindrical member 91 is not limited to the counterclockwise direction, and may be the clockwise direction.

  Since the second cylindrical member 91 rises while rotating, the conducting wire 34 is wound around the terminal pin 33 with a gap in the longitudinal direction. The size of the gap can be adjusted by adjusting the ascent speed. Further, the peeling portion 901 is provided at the tip of the second cylindrical member 91, and the second cylindrical member 91 moves relative to the conducting wire 34 in a state where the peeling portion 901 and the conducting wire 34 are in contact with each other. Specifically, the second cylindrical member 91 rises with respect to the conducting wire 34. For this reason, the insulating member 341 is removed at a location where the conductor 34 comes into contact with the peeling portion 901. As a result, an exposed portion 35 where the core wire 340 is exposed is formed on a part of the covering portion 36 of the conducting wire 34.

  FIG. 9C shows a state in which the winding process for the terminal pin 33 of the conducting wire 34 drawn from the coil 31 is completed. With reference to FIG. 9C, the winding process of the conducting wire 34 around the terminal pin 33 is completed by winding the conducting wire 34 drawn out from the coil 31 a predetermined number of times with a gap in the longitudinal direction of the terminal pin 33. The predetermined number of times can be changed as appropriate.

  When the winding of the conducting wire 34 around the terminal pin 33 is completed, the tip end side of the conducting wire 34 that is not wound around the terminal pin 33 is cut, and the second step is executed. Thereby, the process with respect to the terminal pin 33 of the conducting wire 34 pulled out from the coil 31 is completed.

In the case of the second embodiment, similarly to the case of the first embodiment, an exposed portion 35 in which the core wire 340 is exposed at a part of the conducting wire 34 is formed in a portion wound around the terminal pin 33 of the conducting wire 34. Then, the other part becomes the covering part 36 in which the core wire 340 is covered with the insulating member 341. The second embodiment exhibits the same effect as the first embodiment. In the second embodiment, the insulating member 31 can be removed while winding the conductive wire 34 around the terminal pin 33. For this reason, compared with the case where the winding operation | work of the conducting wire 34 and the removal operation | work of the insulating member 31 are performed separately, a work can be advanced efficiently.
<5. Modified example>

  The configurations of the embodiment and the modification described above are merely examples of the present invention. The configuration of the embodiment and the modification may be changed as appropriate without departing from the technical idea of the present invention. In addition, a plurality of embodiments and modifications may be implemented in combination within a possible range.

  For example, in the above description, the configuration in which the covering portion 36 is located at a place where the conducting wire 34 and the terminal pin 33 are in contact with each other is shown. However, this is only an example. FIG. 10 is a schematic diagram showing a modification of the stator 3 according to the embodiment of the present invention. As shown in FIG. 10, the exposed portion 35 may be located at a location where the conducting wire 34 and the terminal pin 33 are in contact with each other.

  In the above description, the end portion of the conducting wire 34 is wound around the terminal pin 33 in the state of the developed stator 8. However, this is only an example. The end portion of the conducting wire 34 may be wound around the terminal pin 33 after the development stator 8 is made annular.

  Moreover, in the above, the case where this invention was applied to a molded motor was shown. However, this is only an example, and the present invention may be applied to a motor other than a molded motor.

  The present invention can be suitably used for a motor, for example.

DESCRIPTION OF SYMBOLS 1 ... Motor, 2 ... Rotor, 3 ... Stator, 4 ... Casing, 4a ... Casing main body, 4b ... Casing cover, 5 ... Shaft, 6a, 6b ... Bearing, 7 ... Circuit board, 8 ... Unfolded stator, 30 ... Stator core, 31 ... Coil, 32 ... Insulator, 33 ... Terminal pin, 34 ... Lead wire, 35 ... Exposed portion 36 ... covering portion 37 ... solder 38 ... clearance 90 ... first cylindrical member 91 ... second cylindrical member 301 ... core Back, 302 ... teeth, 321 ... support part, 340 ... core wire, 341 ... insulating member, 901 ... peeling part

Claims (15)

A stator for a motor,
Coils,
A conductive wire that has a core wire and an insulating member that covers the core wire, and is drawn from the coil;
A terminal pin around which an end of the conducting wire is wound;
Solder for electrically connecting the conducting wire and the terminal pin;
Have
The portion of the conductive wire wound around the terminal pin has an exposed portion where the core wire is exposed, and a covering portion where the core wire is covered with the insulating member,
The stator, wherein the exposed portion and the terminal pin are electrically connected by the solder.   2. The stator according to claim 1, wherein an outer peripheral portion of the conducting wire includes the exposed portion and the covering portion adjacent to the exposed portion at a portion wound around the terminal pin.   The stator according to claim 1 or 2, wherein the covering portion is located at a position where the conducting wire and the terminal pin are in contact with each other.   The stator according to claim 1, wherein the conductive wire is wound around the terminal pin a plurality of times.   The stator according to claim 4, wherein the conductive wire is wound a plurality of times with a gap in the longitudinal direction with respect to the terminal pin.   The stator according to claim 5, wherein the solder is filled in the gap.   The stator according to any one of claims 1 to 6, wherein the core wire is an aluminum wire.   The stator according to any one of claims 1 to 7, wherein a main component of the insulating member is a polyester resin.   A motor comprising the stator according to claim 1. In the portion wound around the terminal pin of the conducting wire having a core wire and an insulating member covering the core wire,
A first step of forming an exposed portion in which the core wire is exposed in a part of the covering portion that covers the core wire with the insulating member;
A second step of solder bonding the exposed portion and the terminal pin;
A method for manufacturing a stator.   The method of manufacturing a stator according to claim 10, wherein a conductive wire having the exposed portion and the covering portion adjacent to the exposed portion is formed on an outer peripheral portion of the conductive wire by the first step.   The method of manufacturing a stator according to claim 10 or 11, wherein the first step is performed after the conducting wire is wound around the terminal pin. In the first step,
The terminal pin around which the conductive wire is wound is inserted into the first cylindrical member provided with the peeling portion on the inner periphery,
The method for manufacturing a stator according to claim 12, wherein the first tubular member is rotated in a state where the peeling portion is in contact with a part of the conducting wire.   The method for manufacturing a stator according to claim 10 or 11, wherein the first step is performed while the conductive wire is wound around the terminal pin. In the first step,
The terminal pin is inserted into the second cylindrical member provided with a peeling portion at the tip,
The conducting wire is disposed along an axial direction on an outer surface of the second tubular member;
The conducting wire is sandwiched between the peeling portion and the outer surface of the second cylindrical member,
The method of manufacturing a stator according to claim 14, wherein the second cylindrical member is rotated and the tip end portion is moved in a direction away from the base of the terminal pin along the axial direction.

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