WO2023195331A1 - 電動モータおよびその製造方法 - Google Patents

電動モータおよびその製造方法 Download PDF

Info

Publication number
WO2023195331A1
WO2023195331A1 PCT/JP2023/010885 JP2023010885W WO2023195331A1 WO 2023195331 A1 WO2023195331 A1 WO 2023195331A1 JP 2023010885 W JP2023010885 W JP 2023010885W WO 2023195331 A1 WO2023195331 A1 WO 2023195331A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
hole
assembly
electric motor
base member
Prior art date
Application number
PCT/JP2023/010885
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
宏徳 連記
将人 岩瀬
雅也 遠藤
周作 河田
Original Assignee
ニデックプレシジョン株式会社
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 ニデックプレシジョン株式会社 filed Critical ニデックプレシジョン株式会社
Priority to CN202380032306.2A priority Critical patent/CN119054178A/zh
Priority to JP2024514211A priority patent/JPWO2023195331A1/ja
Publication of WO2023195331A1 publication Critical patent/WO2023195331A1/ja

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/22—Optical devices
    • 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
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports

Definitions

  • the present invention relates to an electric motor and a method for manufacturing the same.
  • An object of the present invention is to improve the assembly accuracy of an electric motor.
  • An electric motor is an electric motor having an encoder, and includes a rotor assembly including a rotor having a rotor shaft in the center, a code wheel attached to the rotor, and a bearing supporting the rotor shaft.
  • a stator assembly comprising: a base member having a base member; a stator attached to the base member; and an encoder board attached to the base member and facing the code wheel; , a first through hole parallel to the rotor axis is formed, and a second through hole and a third through hole parallel to the rotor axis are formed in the stator assembly.
  • a method for manufacturing an electric motor is a method for manufacturing an electric motor having an encoder, the method comprising: assembling a rotor assembly including a rotor having a rotor shaft in the center and a code wheel attached to the rotor; an assembly process; a stator assembly comprising: a base member having a bearing portion that supports the rotor shaft; a stator attached to the base member; and an encoder board attached to the base member and facing the code wheel.
  • stator assembly step for assembling a stator assembly
  • motor assembly step for assembling a motor assembly including the rotor assembly and the stator assembly
  • a first through hole being formed in the rotor assembly by attaching a positioning jig to the motor assembly
  • a positioning step of positioning a second through hole and a third through hole formed in the stator assembly and a step of positioning the guide of the positioning jig with the positioning jig attached to the motor assembly.
  • pinion attaching step of attaching a pinion to the rotor shaft along the rotor shaft.
  • FIG. 1 is a perspective view showing an electric motor according to an embodiment of the present invention.
  • FIG. 1 is a perspective view showing an electric motor according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view showing the internal structure of the electric motor.
  • FIG. 1A is a cross-sectional view taken along line AA in FIG. 1A.
  • FIG. 3 is an exploded perspective view of the stator assembly.
  • FIG. 3 is an exploded perspective view of the rotor assembly.
  • FIG. 3 is a perspective view of the rotor assembly. It is a figure showing an example of the manufacturing method of an electric motor. It is a perspective view showing an example of a positioning jig. It is a figure which shows an example of the execution status of a jig attachment process.
  • FIG. 3 is a diagram showing a rotor assembly.
  • FIG. 3 is a diagram showing a rotor assembly.
  • FIG. 3 is a diagram showing a rotor assembly.
  • FIGS. 1A and 1B are perspective views showing an electric motor 10 according to an embodiment of the present invention.
  • FIG. 1A shows the electric motor 10 from the cover member 11 side
  • FIG. 1B shows the electric motor 10 from the base member 12 side.
  • the electric motor 10 has a housing 13 that includes a cover member 11 and a base member 12.
  • a rotor assembly 14 is rotatably housed within the housing 13, and a rotor shaft 16 having a pinion 15 is provided at the center of the rotor assembly 14.
  • the electric motor 10 is provided with a flexible printed circuit board 17, and the flexible printed circuit board 17 extends outward from a gap in the housing 13.
  • FIG. 2 is an exploded perspective view showing the internal structure of the electric motor 10, and FIG. 3 is a cross-sectional view taken along line AA in FIG. 1A.
  • the electric motor 10 includes a stator assembly 21 including a base member 12, a stator 20, etc., and a rotor assembly 14 rotatably supported by the base member 12.
  • a cylindrical bearing holder (bearing portion) 22 that rotatably supports the rotor shaft 16 is provided approximately in the center of the base member 12 .
  • a spring washer 23 and a bearing 24 are housed in one opening of the bearing holder 22, and a bearing 25 is housed in the other opening of the bearing holder 22.
  • the rotor shaft 16 is inserted into the bearings 24 and 25 housed in the bearing holder 22, and the pinion 15 is press-fitted into the tip of the rotor shaft 16 that protrudes from the bearing holder 22.
  • a concave engagement groove 26 is formed in the base member 12, and an engagement claw 27 that engages with the engagement groove 26 is formed in the cover member 11.
  • FIG. 4 is an exploded perspective view showing the stator assembly 21.
  • the stator assembly (stator assembly) 21 includes a base member 12, a flexible printed circuit board (encoder board) 17 attached to the base member 12, and a stator 20 attached to the base member 12. are doing.
  • the base member 12 includes a disk-shaped base plate 30 and a bearing holder 22 attached to the center of the base plate 30.
  • the base member 12 also includes support walls 31 and 32 that are bent at a substantially right angle at the outer edge 30a of the base plate 30, and mounting plates 33 and 34 that extend radially outward from the outer edge 30a of the base plate 30.
  • a plurality of recesses 35 are formed in the support walls 31 and 32 of the base member 12.
  • a through hole (second through hole) h2 is formed in the mounting plate 33 of the base member 12, and through holes 36 and h3c are formed in the mounting plate 34 of the base member 12.
  • a through hole (third through hole) h3a is formed in the base plate 30 of the base member 12. Note that the through holes h2 and h3a formed in the base member 12 are formed parallel to the rotor shaft 16.
  • the flexible printed circuit board 17 (hereinafter referred to as the printed circuit board 17) has an annular portion 40 attached to the base plate 30 and a drawer portion 41 extending radially outward from the annular portion 40.
  • a light emitting element 43 and a light receiving element 44 constituting an encoder 42 are mounted on the annular portion 40 of the printed circuit board 17 .
  • the annular portion 40 of the printed circuit board 17 is formed with a board opening 45 into which the bearing holder 22 is inserted.
  • the inner peripheral surface of the substrate opening 45 is composed of a substrate end surface (second circular arc surface) 46a that is an arcuate surface and a substrate end surface (second plane) 46b that is a flat surface.
  • the outer circumferential surface of the bearing holder 22 includes a holder end surface (first arc surface) 47a that is an arcuate surface and a holder end surface (first plane) 47b that is a flat surface.
  • first arc surface first arc surface
  • first plane first plane
  • the holder end face 47a and the board end face 46a face each other
  • the holder end face 47b and the board end face 46b face each other.
  • the printed circuit board 17 can be positioned with respect to the base member 12 by engaging the bearing holder 22 and the board opening 45 with each other.
  • the annular portion 40 of the printed circuit board 17 is formed with a through hole (third through hole) h3b that faces the through hole h3a of the base plate 30. Note that the through hole h3b formed in the printed circuit board 17 is formed parallel to the rotor axis 16. Further, when attaching the printed circuit board 17 to the base member 12, the printed circuit board 17 is attached to the base member 12 using double-sided tape.
  • the stator 20 supported by the base member 12 has a stator core 50 made of a plurality of electromagnetic steel plates, and a stator coil 52 wound around each tooth 51 of the stator core 50. Furthermore, a plurality of convex portions 53 are formed on the outer circumferential surface 50a of the stator core 50 at predetermined intervals in the circumferential direction.
  • each convex portion 53 of the stator 20 is inserted into each concave portion 35 of the base member 12. Note that when attaching the stator 20 to the base member 12, an adhesive is applied between the base member 12 and the stator 20.
  • FIG. 5A is an exploded perspective view of the rotor assembly 14, and FIG. 5B is a perspective view of the rotor assembly 14.
  • the rotor assembly 14 includes a rotor 62 including a rotor core 60 and a permanent magnet 61, and a slit plate (code wheel) 63 attached to the rotor 62. There is.
  • the rotor 62 includes a rotor hub 64 including a rotor shaft 16, a rotor core 60 attached to the outer peripheral surface of the rotor hub 64, and a plurality of permanent magnets 61 attached to the rotor core 60.
  • the rotor core 60 made of a plurality of electromagnetic steel plates has an inner circumferential annular portion 65 attached to the rotor hub 64 and a plurality of magnet holding pieces 66 extending radially outward from the inner circumferential annular portion 65.
  • a magnet accommodating groove 67 is defined in the rotor core 60 by mutually adjacent magnet holding pieces 66, and a permanent magnet 61 is assembled into the magnet accommodating groove 67 of the rotor core 60.
  • the illustrated rotor 62 is a spoke-type rotor in which permanent magnets 61 are arranged in a spoke shape, and magnet holding pieces 66 and permanent magnets 61 are arranged alternately in the circumferential direction of the rotor core 60. Further, a through hole (first through hole) h1a is formed in the inner peripheral annular portion 65 of the rotor core 60, and a through hole (first through hole) h1b opposite to the through hole h1a is formed in the slit plate 63, which will be described later. It is formed. Note that the through hole h1a formed in the rotor core 60 and the through hole h1b formed in the slit plate 63 are formed parallel to the rotor axis 16.
  • a plurality of slits 68 extending in the radial direction are formed in the slit plate 63 that constitutes the encoder 42. Further, as shown in the enlarged portion of FIG. 5A, in addition to the slits 68, a large number of narrow grooves 69 extending in the radial direction are formed in the slit plate 63.
  • the slits 68 and the narrow grooves 69 in the slit plate 63 in this way, it is possible to switch between reflection and non-reflection of light depending on the rotational position of the rotor assembly 14.
  • the light emitting element 43 and the light receiving element 44 provided on the printed circuit board 17 are arranged to face the slit plate 63 of the rotor assembly 14.
  • the encoder 42 provided in the electric motor 10 is configured as a reflective optical encoder including the slit plate 63, the light emitting element 43, the light receiving element 44, and the like.
  • FIG. 6 is a diagram showing an example of a method for manufacturing the electric motor 10.
  • the manufacturing process of the electric motor 10 includes a steel plate lamination process S100 in which a rotor core 60 is manufactured by laminating punched electromagnetic steel sheets, and a permanent magnet 61 is attached to the rotor core 60 to manufacture a rotor 62.
  • a mounting process S110 is set.
  • a first assembly process S120 is set in which the slit plate 63 is attached to the rotor 62 and the rotor assembly 14 is manufactured. This first assembly step S120 corresponds to a rotor assembly step for assembling the rotor assembly 14.
  • a base processing step S130 in which the base member 12 is manufactured by sheet metal processing or the like, and a board mounting step S140 in which the printed circuit board 17 is attached to the base member 12 are set.
  • a steel plate lamination process S150 in which the stator core 50 is manufactured by laminating punched electromagnetic steel sheets, and a coil attachment process S160 in which the stator coil 52 is attached to the stator core 50 to manufacture the stator 20, is set.
  • a second assembly process S170 is set in which the stator 20 is attached to the base member 12 provided with the printed circuit board 17 to manufacture the stator assembly 21.
  • This second assembly process S170 and the above-mentioned board mounting process S140 correspond to a stator assembly process for assembling the stator assembly 21.
  • a third assembly process S180 is performed in which the rotor assembly 14 is assembled to the stator assembly 21 to manufacture the motor assembly (motor assembly) 70, and a positioning jig 71 is attached to the motor assembly 70.
  • a jig attachment step S190 is set.
  • a pinion installation process S200 in which the pinion 15 is attached to the rotor shaft 16 using the positioning jig 71, and a cover attachment process S210 in which the cover member 11 is attached to the base member 12 are set. has been done.
  • the third assembly process S180 described above corresponds to a motor assembly process for assembling the motor assembly 70
  • the jig attachment process S190 corresponds to a positioning process for attaching the positioning jig 71 to the motor assembly 70.
  • FIG. 7 is a perspective view showing an example of the positioning jig 71.
  • FIG. 8 is a diagram illustrating an example of the execution status of the jig attachment process S190
  • FIG. 9 is a diagram illustrating an example of the execution status of the pinion attachment process S200.
  • the positioning jig 71 has a substantially rectangular jig main body 72 and two positioning pins 73 and 74 attached to the jig main body 72. Further, a protruding guide plate 75 is formed at the end of the jig main body 72, and this guide plate 75 extends parallel to the positioning pins 73 and 74.
  • the positioning jig 71 is brought close to the motor assembly 70 from the base member 12 side.
  • the positioning pin 73 of the positioning jig 71 is inserted into the through hole h2 formed in the mounting plate 33 of the base member 12, and the positioning pin 74 of the positioning jig 71 is inserted into the through hole h2 formed in the base plate 30 of the base member 12. It is inserted into the through hole h3a. Further, as shown by the arrow in the enlarged part of FIG. It is inserted into the hole h1a. In this way, by attaching the positioning jig 71 to the motor assembly 70, the rotor assembly 14 is fixed at a predetermined rotational position with respect to the stator assembly 21.
  • the pinion 15 is press-fitted onto the rotor shaft 16 using a press device 100 or the like.
  • a guide plate 75 of the positioning jig 71 is inserted into the tooth groove 76 of the pinion 15, and the pinion 15 is press-fitted into the rotor shaft 16 along the guide plate 75. ing.
  • the pinion 15 can be attached to the rotor shaft 16 while determining the attachment angle of the pinion 15 to the rotor assembly 14, that is, the position of the teeth 77 of the pinion 15 in the rotor assembly 14.
  • FIG. 10A and 10B are diagrams showing the positional relationship between the motor assembly 70 and the positioning jig 71.
  • FIG. 10A shows the motor assembly 70 from the stator 20 side
  • FIG. 10B shows the motor assembly 70 from the base member 12 side.
  • the positioning jig 71 by attaching the positioning jig 71 to the motor assembly 70, the first through holes h1a, h1b of the rotor assembly 14, the second through hole h2 of the stator assembly 21, and the first through hole h2 of the stator assembly 21 are fixed.
  • the three through holes h3a and h3b can be positioned at predetermined positions. That is, the slit plate 63 of the rotor assembly 14 can be positioned at a predetermined position with respect to the printed circuit board 17 of the stator assembly 21.
  • the light emitting element 43, the light receiving element 44, and the slit plate 63 that constitute the encoder 42 can be appropriately arranged, so that the accuracy of assembling the electric motor 10 including the encoder 42 can be improved, and the electric motor 10 can be assembled with ease. be able to function properly.
  • a guide plate 75 of a positioning jig 71 is inserted into the tooth groove 76 of the pinion 15, and the pinion 15 is press-fitted onto the rotor shaft 16 while following the guide plate 75. has been done.
  • the pinion 15 can be fixed to the rotor shaft 16 while determining the attachment angle of the pinion 15 to the rotor assembly 14, that is, the position of the teeth 77 of the pinion 15 in the rotor assembly 14. In this way, by uniquely determining the mounting angle of the pinion 15 with respect to the rotor shaft 16, it is possible to improve the mounting accuracy of the pinion 15 in the mass-produced electric motor 10.
  • the rotational position of rotor assembly 14 shown in FIG. 10A is the magnetically balanced position of rotor assembly 14 with respect to stator assembly 21. In other words, this is the rotational position where the cogging torque generated between the stator 20 and the rotor 62 becomes "0" when the stator 20 is not energized.
  • the operator can easily attach the positioning jig 71 to the motor assembly 70. That is, when the rotor assembly 14 is assembled to the stator assembly 21, the rotation of the rotor assembly 14 is stable at the magnetically balanced position. Therefore, the operator can easily attach the positioning jig 71 to the motor assembly 70 without finely adjusting the rotation angle of the rotor assembly 14.
  • the center line Cr of the rotor shaft 16 when the stator 20 is not energized, the center line Cr of the rotor shaft 16, the center line C1 of the first through holes h1a and h1b, the center line C2 of the second through hole h2,
  • the center line C3 of the third through holes h3a and h3b is included in one virtual plane P1.
  • the rotor assembly 14 stops at a magnetically balanced position, so the center line Cr, the center line C1, the center line C2, and the center line C3 are arranged in one virtual plane P1.
  • FIG. 11 is a diagram showing the rotor assembly 14. As shown in FIG. As shown in FIG. 11, the two slits 68a formed in the slit plate 63 overlap a virtual plane P1 that includes the centerline Cr of the rotor shaft 16 and the centerline C1 of the first through holes h1a and h1b. By arranging the slits 68a based on the first through holes h1a and h1b in this manner, the positioning accuracy of the slits 68 formed in the slit plate 63 can be improved. Thereby, the assembly precision of the electric motor 10 provided with the encoder 42 can be improved, and the electric motor 10 can be made to function appropriately.
  • the two slits 68a overlap the virtual plane P1, but the invention is not limited to this, and only one of the plurality of slits 68 may overlap the virtual plane P1. That is, it is sufficient that at least one of the slits 68 formed in the slit plate 63 overlaps the virtual plane P1 including the centerline Cr of the rotor shaft 16 and the centerline C1 of the first through holes h1a and h1b.
  • FIG. 12 is a diagram showing the rotor assembly 14. As shown in FIG. Note that a virtual line L1 shown in FIG. 12 is a virtual line connecting the center line Cr of the rotor shaft 16 and the center of the permanent magnet 61.
  • the rotor core 60 includes an inner circumferential annular portion 65 fixed to a rotor hub 64 including the rotor shaft 16, and a plurality of magnet holding pieces 66 extending radially outward from the inner circumferential annular portion 65. have.
  • a magnet accommodating groove 67 is defined in the rotor core 60 by mutually adjacent magnet holding pieces 66, and a permanent magnet 61 is assembled into the magnet accommodating groove 67 of the rotor core 60.
  • the permanent magnets 61 assembled to the rotor 62 are magnetized so that different magnetic poles appear on the surface on one side and the other side in the circumferential direction of the rotor 62. In other words, when one side of the permanent magnet 61 facing the magnet holding piece 66 is magnetized to the north pole, the other side of the permanent magnet 61 facing the magnet holding piece 66 is magnetized to the south pole. ing.
  • the inner circumferential annular portion 65 of the rotor core 60 includes a plurality of first circular arc portions 81 located radially inwardly than the magnet holding pieces 66, and a plurality of first circular arc portions 81 located radially inwardly than the permanent magnets 61. and a plurality of positioned second circular arc portions 82. Further, the first through hole h1a formed in the inner circumferential annular portion 65 is formed in any one of the plurality of second circular arc portions 82 located radially inward than the permanent magnet 61.
  • the radial dimension X1 of the second circular arc portion 82x in which the first through hole h1a is formed is set longer than the radial dimension X2 of the other second circular arc portion 82 in which the first through hole h1a is not formed. ing. Thereby, the magnetic fluxes f1 and f2 of the permanent magnets 61 passing through the inner circumferential annular portion 65 of the rotor core 60 can be stabilized, and variations in the magnetic field mf appearing on the outer circumferential surface of the rotor assembly 14 can be suppressed.
  • forming the first through hole h1a in the inner circumferential annular portion 65 of the rotor core 60 is to reduce the volume of the inner circumferential annular portion 65 near the first through hole h1a, and the inner circumference through which the magnetic flux f1 passes. This is a factor that reduces the cross-sectional area of the annular portion 65. Therefore, the radial dimension X1 of the second circular arc portion 82x in which the first through hole h1a is formed is set longer than the radial dimension X2 of the other second circular arc portion 82 in which the first through hole h1a is not formed. be done.
  • the volume of the inner circumferential annular portion 65 near the first through hole h1a can be increased, and the cross-sectional area of the inner circumferential annular portion 65 through which the magnetic flux f1 passes can be increased.
  • the strength of the magnetic flux f1 of the second circular arc portion 82x where the first through hole h1a is formed and the magnetic flux f2 of the other second circular arc portion 82 where the first through hole h1a is not formed can be brought closer to each other. I can do it.
  • variations in the magnetic field mf appearing on the outer circumferential surface of the rotor assembly 14 can be suppressed, and torque pulsations when rotating the rotor assembly 14 can be reduced.
  • the sum of the radial dimensions Xa and Xb of the portion that straddles the first through hole h1a is the same as that in which the first through hole h1a is not formed. This substantially corresponds to the radial dimension X2 of the second circular arc portion 82. In this way, by setting the radial dimensions Xa and Xb of the portion that straddles the first through hole h1a, the magnetic flux f1 of the second circular arc portion 82x where the first through hole h1a is formed and the first through hole h1a can be adjusted.
  • the strength of the magnetic flux f2 of the other second circular arc portion 82 which is not formed can be made closer to each other. Thereby, variations in the magnetic field mf appearing on the outer circumferential surface of the rotor assembly 14 can be suppressed, and torque pulsations when rotating the rotor assembly 14 can be reduced. It goes without saying that the total value of the radial dimensions Xa and Xb of the second circular arc portion 82x may be made to match the radial dimension X2 of the second circular arc portion 82.
  • the through hole (third through hole) h3a is formed in the base plate 30 of the base member 12, and the through hole (third through hole) h3b is formed in the annular portion 40 of the printed circuit board 17.
  • the present invention is not limited to this, and the through holes h3a and h3b may be omitted from the base member 12 and the printed circuit board 17.
  • FIG. 13 is a diagram showing another example of the execution status of the jig attachment process S190
  • FIG. 14 is a diagram showing another example of the execution status of the pinion attachment process S200. Note that in FIGS. 13 and 14, the same parts and members as those shown in FIGS. 8 and 9 are designated by the same reference numerals, and the explanation thereof will be omitted.
  • a through hole (second through hole) h2 is formed in the mounting plate 33 of the base member 12, and a through hole (third through hole) h3c is formed in the mounting plate 34 of the base member 12. It is formed. Further, a through hole (first through hole) h1a is formed in the inner circumferential annular portion 65 of the rotor core 60, and a through hole (first through hole) h1b is formed in the slit plate 63 opposite to the through hole h1a. ing. In this manner, in the motor assembly 90 of the electric motor 89 according to another embodiment of the present invention, the aforementioned through holes h3a and h3b are eliminated from the base member 12 and the printed circuit board 17.
  • the positioning jig 91 includes a jig main body 92 that is attached to the motor assembly 90 from the stator 20 side, and a pinion guide 93 that is attached to the motor assembly 90 from the base member 12 side.
  • four positioning pins 94 to 97 are attached to the jig main body 92, and a guide plate (guide) 98 is formed on the pinion guide 93. Note that the guide plate 98 of the pinion guide 93 extends parallel to the positioning pins 94 to 97.
  • the motor assembly 90 is brought close to the jig body 92 of the positioning jig 91 from the stator 20 side.
  • the positioning pin 94 of the positioning jig 91 is inserted into the through hole h2 formed in the mounting plate 33 of the base member 12, and the positioning pin 95 of the positioning jig 91 is inserted into the through hole h2 formed in the mounting plate 34 of the base member 12. is inserted into the through hole h3c.
  • the positioning pin 96 of the positioning jig 91 is inserted into the through hole h1a of the rotor core 60 and the through hole h1b of the slit plate 63. In this way, by attaching the positioning jig 91 to the motor assembly 90, the rotor assembly 14 is fixed at a predetermined rotational position with respect to the stator assembly 21.
  • the pinion guide 93 of the positioning jig 91 is brought close to the base member 12 of the motor assembly 90.
  • the positioning pin 94 is inserted into the positioning hole 93a of the pinion guide 93
  • the positioning pin 97 is inserted into the positioning hole 93b of the pinion guide 93.
  • the pinion guide 93 is integrally attached to the jig main body 92. That is, a positioning jig 91 consisting of a jig main body 92 and a pinion guide 93 is attached to the motor assembly 90.
  • the pinion 15 is press-fitted onto the rotor shaft 16 by using a press device 100 or the like.
  • a guide plate 98 of a positioning jig 91 is inserted into the tooth groove 76 of the pinion 15, and the pinion 15 is press-fitted into the rotor shaft 16 along the guide plate 98. Ru.
  • the pinion 15 can be attached to the rotor shaft 16 while determining the attachment angle of the pinion 15 to the rotor assembly 14, that is, the position of the teeth 77 of the pinion 15 in the rotor assembly 14. In this way, by uniquely determining the mounting angle of the pinion 15 with respect to the rotor shaft 16, it is possible to improve the precision of the mounting of the pinion 15 in the mass-produced electric motor 89.
  • the present invention is not limited to the above embodiments, and can be modified in various ways without departing from the gist thereof.
  • the guide plates 75, 98 are inserted into the tooth grooves 76 of the pinion 15 by providing the guide plates 75, 98 on the positioning jigs 71, 91, but the present invention is not limited to this.
  • guides having other shapes may be provided on the positioning jigs 71 and 91.
  • the permanent magnets 61 are provided in a spoke shape on the rotor 62, but the present invention is not limited to this, and for example, the permanent magnets may be attached to the outer peripheral surface of the rotor.
  • ten permanent magnets 61 are provided on the rotor 62, but the present invention is not limited to this, and the number of permanent magnets 61 provided on the rotor 62 may be changed. Further, in the illustrated example, 12 teeth 51 are formed on the stator core 50, but the number is not limited to this, and the number of teeth 51 formed on the stator core 50 may be changed.
  • An electric motor having an encoder, A rotor assembly comprising a rotor having a rotor shaft in the center, and a code wheel attached to the rotor; A stator assembly comprising: a base member including a bearing portion that supports the rotor shaft; a stator attached to the base member; and an encoder board attached to the base member and facing the code wheel; has A first through hole parallel to the rotor axis is formed in the rotor assembly, A second through hole and a third through hole parallel to the rotor axis are formed in the stator assembly. electric motor.
  • the first through hole is formed in the rotor and the code wheel; The electric motor according to the technique 1 above.
  • the second through hole and the third through hole are formed in the base member, The electric motor according to technology 1 or 2 above.
  • the rotor is a rotor core comprising an inner circumferential annular portion to which the rotor shaft is attached; and a plurality of magnet holding pieces extending radially outward from the inner circumferential annular portion; a plurality of permanent magnets arranged alternately with the magnet holding pieces in the circumferential direction of the rotor core and attached to the rotor core; has The first through hole is formed in the inner circumferential annular portion,
  • the electric motor according to any one of techniques 1 to 3 above.
  • the inner circumferential annular portion of the rotor core includes a plurality of first circular arc portions located radially inside than the magnet holding pieces and a plurality of second circular arc portions located radially inside the permanent magnets. It is configured, The first through hole is formed in any one of the plurality of second circular arc parts, The radial dimension of the second circular arc portion in which the first through hole is formed is longer than the radial dimension of the other second circular arc portion in which the first through hole is not formed.
  • the electric motor according to technique 4 above.
  • the outer circumferential surface of the bearing portion is constituted by a first circular arc surface and a first plane
  • the inner circumferential surface of the opening of the encoder board that engages with the bearing portion is configured by a second circular arc surface opposite to the first circular arc surface and a second flat surface opposite to the first flat surface.
  • the electric motor according to any one of the techniques 1 to 5 above.
  • a plurality of slits extending in the radial direction are formed in the code wheel, At least one of the plurality of slits overlaps a virtual plane including a centerline of the rotor shaft and a centerline of the first through hole. The electric motor according to any one of techniques 1 to 6 above.
  • a method of manufacturing an electric motor having an encoder comprising: a rotor assembly step of assembling a rotor assembly including a rotor having a rotor shaft in the center and a code wheel attached to the rotor; A stator assembly step of assembling a stator assembly including a base member including a bearing portion that supports the rotor shaft, a stator attached to the base member, and an encoder board attached to the base member and facing the code wheel.
  • a method for manufacturing an electric motor comprising:

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
PCT/JP2023/010885 2022-04-05 2023-03-20 電動モータおよびその製造方法 WO2023195331A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202380032306.2A CN119054178A (zh) 2022-04-05 2023-03-20 电动马达及其制造方法
JP2024514211A JPWO2023195331A1 (enrdf_load_stackoverflow) 2022-04-05 2023-03-20

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022063123 2022-04-05
JP2022-063123 2022-04-05

Publications (1)

Publication Number Publication Date
WO2023195331A1 true WO2023195331A1 (ja) 2023-10-12

Family

ID=88242744

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/010885 WO2023195331A1 (ja) 2022-04-05 2023-03-20 電動モータおよびその製造方法

Country Status (3)

Country Link
JP (1) JPWO2023195331A1 (enrdf_load_stackoverflow)
CN (1) CN119054178A (enrdf_load_stackoverflow)
WO (1) WO2023195331A1 (enrdf_load_stackoverflow)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0355254U (enrdf_load_stackoverflow) * 1990-09-05 1991-05-28
JP2003047211A (ja) * 2001-07-26 2003-02-14 Mitsumi Electric Co Ltd ブラシレスモータおよびその組立方法
JP2010124517A (ja) * 2008-11-17 2010-06-03 Shuwa Co Ltd Ｓｒモータ
JP2012044755A (ja) * 2010-08-17 2012-03-01 Nippon Densan Corp モータ
JP2014155357A (ja) * 2013-02-12 2014-08-25 Mitsuba Corp ブラシレスモータ
JP2015084646A (ja) * 2015-01-09 2015-04-30 東京パーツ工業株式会社 スピンドルモータ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0355254U (enrdf_load_stackoverflow) * 1990-09-05 1991-05-28
JP2003047211A (ja) * 2001-07-26 2003-02-14 Mitsumi Electric Co Ltd ブラシレスモータおよびその組立方法
JP2010124517A (ja) * 2008-11-17 2010-06-03 Shuwa Co Ltd Ｓｒモータ
JP2012044755A (ja) * 2010-08-17 2012-03-01 Nippon Densan Corp モータ
JP2014155357A (ja) * 2013-02-12 2014-08-25 Mitsuba Corp ブラシレスモータ
JP2015084646A (ja) * 2015-01-09 2015-04-30 東京パーツ工業株式会社 スピンドルモータ

Also Published As

Publication number Publication date
CN119054178A (zh) 2024-11-29
JPWO2023195331A1 (enrdf_load_stackoverflow) 2023-10-12

Similar Documents

Publication Publication Date Title
KR100678983B1 (ko) 축방향 간극형 회전전기기기 및 그 회전전기기기를 이용하는 전동이륜차
US8653707B2 (en) Motor having an encoder to detect rotation of a rotating body
JP3779097B2 (ja) 電動機の回転子
WO2017002869A1 (ja) ブラシレスモータ
US4623809A (en) Stepper motor housing and pole assembly
JPH0548577U (ja) 電磁式有限回転型電動機の原点復帰機構
KR100854025B1 (ko) 구동장치
CN111509885B (zh) 马达及送风装置
JP2019075982A (ja) 電気機械
KR100550140B1 (ko) 모터
JP2018038250A (ja) モータ及びそのモータを備える回転装置
WO2023195331A1 (ja) 電動モータおよびその製造方法
JP7433183B2 (ja) 回転電機および回転電機の製造方法
JP2007060860A (ja) 永久磁石式回転子
WO2018180634A1 (ja) モータ
JP4701554B2 (ja) モータ
CN210833587U (zh) 编码器和马达
JP7468214B2 (ja) 回転電機のロータ
WO2022107714A1 (ja) モータ
JP2007129892A (ja) モータ及びモータの製造方法
JP2022152554A (ja) モータ
JP2014090609A (ja) モータ
JP4748660B2 (ja) 駆動装置
JP7626214B2 (ja) 電動モーターのローター
JP2020048291A (ja) 組立治具およびそれを用いた回転機の製造方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23784621

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2024514211

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 202380032306.2

Country of ref document: CN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 23784621

Country of ref document: EP

Kind code of ref document: A1