WO2022097253A1 - モータ及びモータの製造方法 - Google Patents

モータ及びモータの製造方法 Download PDF

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Publication number
WO2022097253A1
WO2022097253A1 PCT/JP2020/041464 JP2020041464W WO2022097253A1 WO 2022097253 A1 WO2022097253 A1 WO 2022097253A1 JP 2020041464 W JP2020041464 W JP 2020041464W WO 2022097253 A1 WO2022097253 A1 WO 2022097253A1
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WO
WIPO (PCT)
Prior art keywords
exterior member
annular
joint surface
motor
sectional area
Prior art date
Application number
PCT/JP2020/041464
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English (en)
French (fr)
Japanese (ja)
Inventor
健太 波多野
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2022554176A priority Critical patent/JP7205008B2/ja
Priority to PCT/JP2020/041464 priority patent/WO2022097253A1/ja
Publication of WO2022097253A1 publication Critical patent/WO2022097253A1/ja

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/14—Casings; Enclosures; Supports
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof

Definitions

  • This disclosure relates to a motor and a method for manufacturing the motor.
  • the motor includes, for example, a bottomed cylindrical housing, a lid that closes the opening of the housing, a stator incorporated in the housing, and a rotor rotatably provided in the stator with a gap.
  • a motor is disclosed in, for example, Patent Document 1.
  • both the housing and the lid which are exterior members, are made of synthetic resin.
  • the housing and lid are joined to each other using a laser welding method.
  • it is assumed that the wall thickness between the housing and the lid is constant. Therefore, in the motor disclosed in Patent Document 1, if the wall thickness between the housing and the lid is not constant, they may not be properly joined.
  • the present disclosure has been made to solve the above-mentioned problems, and even if the wall thickness between the exterior members is not constant, the exterior members can be appropriately joined to each other by using a hot wire welding method.
  • the purpose is to provide a capable motor.
  • the motor according to the present disclosure is between a first exterior member having a first joint surface, a second exterior member having a second joint surface facing the first joint surface, and a first joint surface and a second joint surface.
  • the inner circumference of the first exterior member and the inner circumference of the second exterior member are surrounded by an annular plate having conductivity, and the annular plate is sandwiched between the first joint surface and the second joint surface.
  • An annular welded portion joined by welding between them, a pair of electrode contact portions provided in the annular welded portion and contacted with electrodes, and at least one of a first exterior member and a second exterior member.
  • the annular welded portion is provided with a small cross-sectional area portion formed so that the cross-sectional area becomes smaller as the wall thickness of the thick portion becomes thicker.
  • the exterior members can be appropriately joined to each other by using the hot wire welding method.
  • FIG. 5A is an enlarged view of the small cross-sectional area of the annular plate.
  • FIG. 5B is a cross-sectional view taken along the line BB of FIG. 5A.
  • 5C is a cross-sectional view taken along the line CC of FIG. 5A.
  • FIG. 7A is a vertical cross-sectional view showing a state in which the electrode contact portion is formed so as to be bent with respect to the annular welded portion.
  • FIG. 7B is a vertical cross-sectional view showing a state in which the electrode contact portion is elastically deformed. It is a figure which shows the manufacturing method of the annular plate in order.
  • FIG. 8A is a plan view showing the structure of a flat plate used as a material for the annular plate.
  • FIG. 8B is a plan view showing a flat plate in the process of processing.
  • FIG. 8C is a plan view showing a flat plate after processing.
  • Embodiment 1 The motor according to the first embodiment will be described with reference to FIGS. 1 to 5.
  • FIG. 1 is a vertical sectional view showing a configuration of a motor according to the first embodiment.
  • FIG. 2 is a plan view showing the configuration of the motor according to the first embodiment.
  • FIG. 3 is a vertical cross-sectional view when joining the stator ASSY 11 and the case ASSY 12. Note that FIG. 3 illustrates a portion of the stator ASSY 11 corresponding to the upper / exterior member 21.
  • the motor according to the first embodiment is, for example, a linear motor, and includes a stator ASSY 11, a case ASSY 12, and an output shaft 13.
  • the stator ASSY 11 constitutes the lower part of the motor, and the case ASSY 12 constitutes the upper part of the motor. Although the details will be described later, the stator ASSY 11 and the case ASSY 12 are joined in the rotation axis direction of the motor by using a hot wire welding method. At this time, the stator ASSY 11 and the case ASSY 12 are joined with an annular plate 90 used for hot wire welding sandwiched between them.
  • the output shaft 13 is arranged at a substantially central portion of the stator ASSY 11 and the case ASSY 12.
  • the output shaft 13 directly moves with respect to the stator ASSY 11 and the case ASSY 12.
  • the output shaft 13 is supported with respect to the stator ASSY 11 so as to be reciprocally movable in the axial direction of the output shaft 13.
  • the lower end of the output shaft 13 is mechanically connected to, for example, a valve or the like. Therefore, the motor can open and close the valve by reciprocating the output shaft 13 in the axial direction thereof.
  • the stator ASSY 11 has a first exterior member 20, a stator 30, a rotor 40, bearings 51 and 52, a brush 53, and a bush 54.
  • the first exterior member 20 has a tapered cylindrical shape and forms the outer shell of the stator ASSY 11.
  • the first exterior member 20 covers the stator 30 and the rotor 40 from the outside thereof.
  • the stator 30 and the rotor 40 are arranged coaxially.
  • the rotor 40 rotates with respect to the stator 30.
  • the output shaft 13 penetrates each center of the stator 30 and the rotor 40.
  • the first exterior member 20 is made of, for example, a resin material.
  • the first exterior member 20 is composed of an upper exterior member 21 and a lower exterior member 22.
  • the upper exterior member 21 has a cylindrical shape and constitutes the upper portion of the first exterior member 20.
  • the lower exterior member 22 has a tapered cylindrical shape and constitutes the lower portion of the first exterior member 20.
  • the upper exterior member 21 and the lower exterior member 22 are joined by using, for example, bolts 23 or the like. At this time, the lower end of the upper exterior member 21 is inserted into the upper end of the lower exterior member 22.
  • the stator 30 has a cylindrical shape.
  • the stator 30 is fixed to the upper / exterior member 21. Further, the stator 30 has a magnet 31 and a yoke 32.
  • Both the magnet 31 and the yoke 32 have an arc shape.
  • the yoke 32 is arranged radially outside the stator 30 with respect to the magnet 31.
  • the magnet 31 is, for example, a ferrite magnet, a permanent magnet, or the like.
  • the yoke 32 is made of, for example, iron.
  • the rotor 40 has a cylindrical shape.
  • the rotor 40 is arranged inside the stator 30 in the radial direction. Further, the rotor 40 is rotatably supported by the upper / exterior member 21.
  • the rotor 40 has a plurality of rotor cores 41, a plurality of coils 42, a commutator 43, a rotor shaft 44, and a resin member 45.
  • the plurality of rotor cores 41 are arranged at equal intervals in the circumferential direction of the rotor 40. These rotor cores 41 are arranged so as to face the magnet 31 and the yoke 32 in the radial direction of the rotor 40.
  • the plurality of coils 42 are wound around each rotor core 41, respectively.
  • the commutator 43 has a plurality of electrodes. These electrodes are arranged at equal intervals in the circumferential direction of the rotor 40. Each electrode corresponds to each coil 42, respectively. One end of each coil 42 is electrically connected to the corresponding electrode.
  • the brush 53 is fixed to the upper / exterior member 21.
  • the brush 53 is arranged on the outer side in the radial direction of the commutator 43, and is in contact with each electrode of the commutator 43.
  • the rotor shaft 44 is formed in a cylindrical shape.
  • the rotor shaft 44 is inserted into and fitted into a central hole formed by a plurality of rotor cores 41. Further, the rotor shaft 44 is rotatably supported by the upper / exterior member 21 via the bearings 51 and 52.
  • the rotor shaft 44 has a female threaded portion 44a.
  • the female threaded portion 44a is formed on the inner peripheral surface of the rotor shaft 44.
  • the output shaft 13 is arranged inside the rotor shaft 44.
  • the output shaft 13 has a male screw portion 13a.
  • the male screw portion 13a is formed on the outer peripheral surface of the output shaft 13.
  • the male threaded portion 13a and the female threaded portion 44a are in mesh with each other.
  • the bush 54 is fixed to the lower end of the upper exterior member 21 and is arranged inside the lower exterior member 22.
  • the bush 54 supports the output shaft 13 so as to be movable in the axial direction thereof. Further, the bush 54 regulates the rotation of the output shaft 13. Therefore, when the rotor shaft 44 rotates, the output shaft 13 reciprocates in the axial direction inside the rotor shaft 44 because the rotation of the output shaft 13 is restricted by the bush 54.
  • the resin member 45 integrally fixes a plurality of rotor cores 41, a plurality of coils 42, a commutator 43, and a rotor shaft 44. Therefore, when the rotor shaft 44 rotates, the plurality of rotor cores 41, the plurality of coils 42, and the commutator 43 rotate together with the rotor shaft 44.
  • the female threaded portion 44a of the rotor shaft 44 may be formed by a part of the resin member 45 wrapping around inside the rotor shaft 44.
  • the case ASSY 12 has a second exterior member 60, a position sensor 71, a sensor magnet 72, a sensor shaft 73, a spring 74, and an external terminal 75.
  • the second exterior member 60 has a substantially conical shape and forms the outer shell of the case ASSY 12.
  • the second exterior member 60 covers the position sensor 71, the sensor magnet 72, the sensor shaft 73, the spring 74, and the external terminal 75 from the outside thereof.
  • the second exterior member 60 is made of, for example, a resin material.
  • the second exterior member 60 has a plurality of outer surface ribs 60b and a plurality of inner surface ribs 60c.
  • the outer surface rib 60b and the inner surface rib 60c reinforce the second exterior member 60.
  • the inner rib 60c constitutes a thick portion.
  • the outer surface rib 60b is provided on the outer surface of the second exterior member 60. These outer surface ribs 60b extend in the radial direction of the second exterior member 60. Further, the top surface (upper surface) of the outer surface rib 60b faces upward. The top surface is gradually inclined downward from the radially inner side to the radial outer side of the second exterior member 60.
  • the inner surface rib 60c is provided on the inner surface of the second exterior member 60 so as to face the radial outer end of the outer surface rib 60b. These inner surface ribs 60c extend in the radial direction of the second exterior member 60. Further, the top surface (lower surface) of the inner surface rib 60c faces downward. The top surface is gradually inclined downward from the radially inner side to the radial outer side of the second exterior member 60.
  • the position sensor 71 measures the strength of the magnetic field of the sensor magnet 72, and detects the axial position of the output shaft 13 based on the measured strength of the magnetic field.
  • the sensor magnet 72 is built in the upper end of the sensor shaft 73. The lower end of the sensor shaft 73 can come into contact with the upper end of the output shaft 13. Further, the spring 74 is sandwiched between the second exterior member 60 and the sensor magnet 72 in a compressed state.
  • the spring 74 is in a state in which the sensor magnet 72 and the sensor shaft 73 are always urged downward. Therefore, the sensor shaft 73 is always pressed against the output shaft 13. As a result, when the output shaft 13 reciprocates in the axial direction, the sensor magnet 72 is always pressed against the output shaft 13, so that the sensor magnet 72 can be interlocked with the reciprocating movement of the output shaft 13.
  • the position sensor 71 measures the strength of the magnetic field of the sensor magnet 72 linked to the reciprocating movement of the output shaft 13. Further, the position sensor 71 detects the axial position of the output shaft 13 based on the strength of the measured magnetic field.
  • the external terminal 75 is a part where electric power is supplied from the outside of the motor.
  • the output shaft 13 reciprocates in its axial direction.
  • the valve opens or closes with the reciprocating movement of the output shaft 13.
  • the motor can open and close the valve by converting the rotation of the rotor 40 accompanying the input of electric energy into the axial movement of the output shaft 13. Then, the motor detects the valve opening degree based on the axial position of the output shaft 13 detected by the position sensor 71.
  • FIG. 4 is a plan view showing the configuration of the annular plate 90.
  • FIG. 5 is an enlargement of a main part of the annular plate 90.
  • the upper exterior member 21 of the first exterior member 20 has a first joint surface 21a.
  • the first joint surface 21a has an annular shape and is formed along the circumferential direction of the upper / exterior member 21.
  • the second exterior member 60 has a second joint surface 60a.
  • the second joint surface 60a has an annular shape and is formed along the circumferential direction of the second exterior member 60.
  • the first joint surface 21a and the second joint surface 60a are surfaces facing each other at the time of joining the upper exterior member 21 and the second exterior member 60.
  • the annular plate 90 is interposed between the first joint surface 21a and the second joint surface 60a.
  • the annular plate 90 is arranged so as to surround the inner circumference of the opening edge portion of the upper / exterior member 21 and the inner circumference of the opening edge portion of the second exterior member 60.
  • a conductive annular plate 90 is sandwiched between the joining surfaces 21a and 60a of the exterior members 21 and 60 formed of resin materials, and the annular plate 90 is sandwiched between them.
  • the joining method applied to the motor according to the first embodiment is a method of joining the exterior members 21 and 60 to each other by a hot wire welding method.
  • the annular plate 90 has an annular welding portion 91, a plurality of small cross-sectional area portions 92, and a pair of electrode contact portions 93.
  • the annular plate 90 is made of a conductive metal material, for example, a SUS material.
  • the annular welded portion 91 has an annular shape and has substantially the same diameter as the diameter of the first joint surface 21a and the second joint surface 60a. When the upper exterior member 21 and the second exterior member 60 are joined, the annular welded portion 91 is sandwiched between the first joint surface 21a and the second joint surface 60a to weld them. be.
  • the plurality of small cross-sectional area portions 92 are provided in the annular welding portion 91.
  • the number of the small cross-sectional area portions 92 is the same as the number of the inner surface ribs 60c of the second exterior member 60.
  • the small cross-sectional area 92 is a portion having the smallest cross-sectional area in the annular welded portion 91, and is provided at a position facing the inner surface rib 60c in the annular welded portion 91. That is, the small cross-sectional area portion 92 is arranged at the same position as the circumferential position of the inner surface rib 60c in the circumferential direction of the second exterior member 60.
  • the small cross-sectional area portion 92 is arranged corresponding to the position where the wall thickness of the resin material becomes the hottest. Further, the small cross-sectional area portion 92 is formed so that the cross-sectional area becomes smaller as the wall thickness of the inner surface rib 60c becomes thicker.
  • the pair of electrode contact portions 93 are provided in the annular welding portion 91. Electrodes (not shown) can be contacted with each of these electrode contact portions 93.
  • the electrode contact portion 93 projects radially outward from the outer peripheral portion of the annular welded portion 91. Therefore, even if the annular welding portion 91 is sandwiched between the first joint surface 21a and the second joint surface 60a, the electrode contact portion 93 is not sandwiched between them, and the electrodes can be easily contacted. It has become.
  • the cross-sectional area of the small cross-sectional area portion 92 is the smallest, so that the electric resistance of the small cross-sectional area portion 92 is the largest. That is, among the annular welded portions 91, the calorific value of the small cross-sectional area portion 92 is the largest. In this way, the annular plate 90 can melt more resin material in the portion where the wall thickness of the resin material becomes thicker by providing the annular welding portion 91 with the small cross-sectional area portion 92.
  • the amount of heat required for melting the exterior members is designed to be uniform in the circumferential direction.
  • the cross-sectional area of the conventional annular plate used in the hot wire welding method is also made uniform in the circumferential direction.
  • a small cross-sectional area portion 92 is provided in the annular welding portion 91 corresponding to the inner surface rib 60c which is a thick portion. Since the inner rib 60c has a thick wall, the amount of heat for melting it increases accordingly. On the other hand, since the small cross-sectional area 92 has the smallest cross-sectional area among the annular welded portions 91, the small cross-sectional area portion 92 has the largest calorific value among the annular welded portions 91.
  • the thick portion is the inner rib 60c of the second exterior member 60, but the thick portion is not limited thereto.
  • the wall thickness portion is provided on at least one of the first exterior member 20 and the second exterior member 60, and may be any one as long as it thickens the wall thickness at the joint portion between them.
  • the motor according to the first embodiment has a first exterior member 20 having a first welded surface 21a, a second exterior member 60 having a second welded surface 60a facing the first welded surface 21a, and a first welded joint.
  • An annular plate 90 is provided between the surface 21a and the second joining surface 60a, surrounds the inner circumference of the first exterior member 20 and the inner circumference of the second exterior member 60, and has a conductive annular plate 90.
  • a pair of electrode contact portions provided in the annular welded portion 91, which is sandwiched between the first joint surface 21a and the second joint surface 60a and joined by welding between them, and the annular welded portion 91, in which the electrodes are in contact with each other.
  • the annular welding portion 91 is provided so that the thickness of the thick portion becomes thicker. It has a small cross-sectional area portion 92 formed so that the cross-sectional area becomes small. Therefore, even if the wall thickness between the exterior members 20 and 60 is not constant, the motor can appropriately join the exterior members 20 and 60 by using the hot wire welding method.
  • the annular welding portion 91 is sandwiched between the first joint surface 21a and the second joint surface 60a, and the electrodes are brought into contact with the pair of electrode contact portions 93, respectively.
  • the calorific value of the small cross-sectional area portion 92 is made larger than the calorific value of the annular welded portion 91 other than the small cross-sectional area portion 92. 1
  • the exterior member 20 and the second exterior member 60 are joined by welding. Therefore, as a method for manufacturing a motor, even if the wall thickness between the exterior members 20 and 60 is not constant, the exterior members 20 and 60 can be appropriately joined by using a hot wire welding method.
  • Embodiment 2 The motor according to the second embodiment will be described with reference to FIGS. 6 and 7.
  • FIG. 6 is a plan view showing the configuration of the annular plate 90 applied to the motor according to the second embodiment.
  • FIG. 7 is a cross-sectional view showing a state in which the annular plate 90 is sandwiched between the upper exterior member 21 of the first exterior member 20 and the second exterior member 60.
  • the annular plate 90 according to the first embodiment includes an electrode contact portion 93, whereas the annular plate 90 according to the second embodiment has an electrode contact portion 94. I have.
  • the electrode contact portion 94 is formed so as to be bent from the outer peripheral portion of the annular welded portion 91 toward the central axis of the annular welded portion 91 (see FIG. 7A). Therefore, the electrode contact portion 94 absorbs the impact load when the electrodes are contacted as compared with the electrode contact portion 93 protruding radially outward from the outer peripheral portion of the annular welded portion 91, and the annular welded portion 94. It is difficult to convey to 91 (see FIG. 7B). In this way, the annular plate 90 can reduce the impact load transmitted from the electrode contact portion 94 to the annular welded portion 91 and suppress the vibration of the annular welded portion 91. Therefore, in the motor, the upper exterior member 21 and the second exterior member 60 are joined with high accuracy.
  • the electrode when the electrode is brought into contact with the electrode contact portion 94, the electrode may be operated by a spring type or cylinder type device. When such a device is used, the applied load of the electrode to the electrode contact portion 94 varies. On the other hand, since the electrode contact portion 94 is formed so as to be bent with respect to the annular welding portion 91, even if the applied load from the electrode varies, the applied load is absorbed and attenuated.
  • the electrode contact portion 94 is formed so as to be bent from the annular welded portion 91 toward the central axis of the annular welded portion 91. Therefore, the motor can make it difficult to transmit the impact load generated when the electrode comes into contact with the electrode contact portion 94 to the annular welding portion 91. Therefore, the motor can suppress the vibration of the annular welded portion 91 and perform the joining between the upper / exterior member 21 and the second exterior member 60 with high accuracy.
  • Embodiment 3 The method for manufacturing the motor according to the third embodiment will be described with reference to FIG.
  • FIG. 8 is a diagram showing the manufacturing method of the annular plate 90 in order. Note that FIG. 8 shows an example of manufacturing an annular plate 90 having an electrode contact portion 93.
  • the annular plate 90 can be manufactured from, for example, a flat plate 90A.
  • the flat plate 90A is obtained by punching a conductive metal plate.
  • the electrode contact portion 93 and the slit 95 are previously formed on the flat plate 90A after the punching process.
  • the flat plate 90A is plastically deformed so as to widen the width of the slit 95. Further, as shown in FIG. 8C, the flat plate 90A is plastically deformed so as to widen the width of the slit 95 until the entire flat plate 90A becomes annular.
  • the annular welded portion 91 is formed on the flat plate 90A.
  • the small cross-sectional area portion 92 is machined with respect to the annular welded portion 91 of the flat plate 90A shown in FIG. 8C according to the circumferential position and the wall thickness of the inner surface rib 60c.
  • the annular plate 90 as shown in FIG. 4 is manufactured.
  • the method of manufacturing the annular plate 90 from the flat plate 90A can improve the yield of the material as compared with the manufacturing method of punching in the state of the finished product shown in FIG.
  • the electrode contact portion 93 is subjected to the annular welding portion 91.
  • the electrode contact portion 94 may be formed by bending in the direction of the central axis of the above.
  • the annular plate 90 plastically deforms the conductive flat plate 90A so as to widen the width of the slit 95 formed in the flat plate 90A, and the flat plate 90A is plastically deformed.
  • the method of manufacturing a motor can improve the yield of the motor.
  • any combination of embodiments can be freely combined, any component of each embodiment can be modified, or any component can be omitted in each embodiment. ..
  • the motor by providing a small cross-sectional area portion on a conductive annular plate, even if the wall thickness of the joint portion between the exterior members is not constant, the motor can be appropriately joined by using the hot wire welding method. It is suitable for use in motors and the like.
  • stator ASSY 12 case ASSY, 13 output shaft, 13a male screw part
  • 20 first exterior member, 21 upper exterior member, 21a first joint surface, 22 lower exterior member, 23 bolt, 30 stator, 31 magnet, 32 yoke , 40 rotor, 41 rotor core, 42 coil, 43 commutator, 44 rotor shaft, 44a female thread part, 45 resin member, 51, 52 bearing, 53 brush, 54 bush, 60 second exterior member, 60a second joint surface, 60b outer surface rib, 60c inner surface rib, 71 sensor, 72 sensor magnet, 73 sensor shaft, 74 spring, 75 external terminal, 90 annular plate, 90A flat plate, 91 annular welding part, 92 small cross-sectional area part, 93,94 electrode contact Part, 95 slits.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Motor Or Generator Frames (AREA)
PCT/JP2020/041464 2020-11-06 2020-11-06 モータ及びモータの製造方法 WO2022097253A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2022554176A JP7205008B2 (ja) 2020-11-06 2020-11-06 モータ及びモータの製造方法
PCT/JP2020/041464 WO2022097253A1 (ja) 2020-11-06 2020-11-06 モータ及びモータの製造方法

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Application Number Priority Date Filing Date Title
PCT/JP2020/041464 WO2022097253A1 (ja) 2020-11-06 2020-11-06 モータ及びモータの製造方法

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WO (1) WO2022097253A1 (enrdf_load_stackoverflow)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011226610A (ja) * 2010-04-22 2011-11-10 Nippon Pillar Packing Co Ltd 溶着継手及びその溶着方法
JP2020036388A (ja) * 2018-08-27 2020-03-05 三菱電機株式会社 モータ及びモータ製造方法
JP2020044844A (ja) * 2019-12-03 2020-03-26 株式会社フジクラ 接合構造体

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032264U (ja) * 1983-08-08 1985-03-05 斉藤　恵三 注射剤用管びんのキヤツプ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011226610A (ja) * 2010-04-22 2011-11-10 Nippon Pillar Packing Co Ltd 溶着継手及びその溶着方法
JP2020036388A (ja) * 2018-08-27 2020-03-05 三菱電機株式会社 モータ及びモータ製造方法
JP2020044844A (ja) * 2019-12-03 2020-03-26 株式会社フジクラ 接合構造体

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