WO2023189264A1 - Machine électrique tournante et son procédé de fabrication - Google Patents

Machine électrique tournante et son procédé de fabrication Download PDF

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Publication number
WO2023189264A1
WO2023189264A1 PCT/JP2023/008460 JP2023008460W WO2023189264A1 WO 2023189264 A1 WO2023189264 A1 WO 2023189264A1 JP 2023008460 W JP2023008460 W JP 2023008460W WO 2023189264 A1 WO2023189264 A1 WO 2023189264A1
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WO
WIPO (PCT)
Prior art keywords
cylindrical wall
wall portion
recess
region
trigger
Prior art date
Application number
PCT/JP2023/008460
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English (en)
Japanese (ja)
Inventor
伸哉 堀内
大介 川田
明 新島
Original Assignee
株式会社ミツバ
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 株式会社ミツバ filed Critical 株式会社ミツバ
Publication of WO2023189264A1 publication Critical patent/WO2023189264A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods 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
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos

Definitions

  • the present invention relates to a rotating electrical machine equipped with a stator and a rotor, and a method for manufacturing the same.
  • an ACG starter has been used to start the engine of a motorcycle or the like.
  • ACG is an abbreviation for "Alternating Current Generator,” and the ACG starter operates as a starter motor that rotates the crankshaft when starting the engine, and as a generator that charges the vehicle battery after starting the engine.
  • the ACG starter is also used to detect the rotational state of the crankshaft. Therefore, the on-vehicle controller can grasp the ignition timing of the plug and the timing of fuel injection.
  • Patent Document 1 describes a flywheel (rotating member) used in a rotating electric machine.
  • This flywheel includes a bottomed cylindrical yoke (ferromagnetic material), and a plurality of permanent magnets are fixed to the inner peripheral surface of the cylindrical portion forming the yoke. Further, on the outer circumferential surface of the cylindrical portion, a plurality of trigger protrusions that protrude toward the outer diameter side and are long in the axial direction are provided in line in the circumferential direction.
  • trigger protrusions are used to detect the rotational state of the crankshaft fixed to the flywheel. Specifically, the magnetism of the magnetized trigger protrusion is detected by a sensor (magnetic sensor) disposed at a portion of the flywheel facing the trigger protrusion. Thereby, the on-vehicle controller to which the sensor is electrically connected detects the rotational state of the crankshaft.
  • a sensor magnetic sensor
  • An object of the present invention is to provide a rotating electrical machine that can sufficiently improve the roundness of a rotating member having a convex portion used to obtain a trigger signal, and a method for manufacturing the same.
  • a rotating electric machine of the present invention includes a stator, and a rotor that rotates with respect to the stator and has a plurality of permanent magnets arranged so that N poles and S poles appear alternately in the rotation direction.
  • the rotor is a rotating electric machine, and the rotor includes a rotating member having a bottom wall portion to which a rotating shaft is fixed, and a cylindrical wall portion provided on the bottom wall portion and to which a plurality of the permanent magnets are fixed.
  • the cylindrical wall has a first region and a second region arranged in a circumferential direction, and the first region has a cylindrical wall that protrudes outward in a radial direction of the cylindrical wall.
  • a plurality of convex portions used for obtaining a trigger signal indicating the rotational state of the rotating shaft are provided, and the second region is provided on the radially inner side of the cylindrical wall portion, and is provided on the radially inner side of the cylindrical wall portion. At least one first recess is provided that is recessed radially outward.
  • a method for manufacturing a rotating electric machine includes: a stator; a rotor that rotates with respect to the stator and has a plurality of permanent magnets arranged so that north poles and south poles appear alternately in the rotational direction;
  • a method for manufacturing a rotating electric machine comprising: preparing a rotating member having a bottom wall portion to which a rotating shaft is fixed; and a cylindrical wall portion provided on the bottom wall portion and to which a plurality of permanent magnets are fixed. and a first step of setting the rotary member in a press device, and a first region provided on the cylindrical wall protruding outward in the radial direction of the cylindrical wall to indicate the rotational state of the rotating shaft.
  • the first region of the cylindrical wall is provided with a plurality of protrusions that protrude outward in the radial direction of the cylindrical wall and are used to obtain a trigger signal indicating the rotational state of the rotating shaft.
  • at least one first recess is provided in the second region of the cylindrical wall, which is provided on the radially inner side of the cylindrical wall and is recessed on the radially outer side of the cylindrical wall.
  • FIG. 1 is a perspective view showing an ACG starter according to the present invention.
  • FIG. 2 is a sectional view illustrating the internal structure of the ACG starter of FIG. 1.
  • FIG. FIG. 2 is a perspective view showing a rotor body of the ACG starter of FIG. 1.
  • FIG. FIG. 4 is a plan view of the rotor main body of FIG. 3 viewed from above. It is a view taken along arrow A in FIG. 4.
  • 6 is a sectional view taken along line BB in FIG. 5.
  • FIG. 7 is an enlarged view of a broken line circle C section in FIG. 6.
  • FIG. FIG. 7 is an enlarged view of a broken line circle D section in FIG. 6;
  • FIG. 3 is a cross-sectional view of the first press device for explaining the [work setting process].
  • FIG. 11 is a sectional view taken along line EE in FIG. 10.
  • FIG. FIG. 12 is a sectional view corresponding to FIG. 11 of the second press device for explaining the [correction recess forming process].
  • FIG. 1 is a perspective view showing an ACG starter according to the present invention
  • FIG. 2 is a sectional view illustrating the internal structure of the ACG starter in FIG. 1
  • FIG. 3 is a perspective view showing the rotor body of the ACG starter in FIG. 1.
  • FIG. 4 is a plan view of the rotor main body in FIG. 3 viewed from above
  • FIG. 5 is a view in the direction of arrow A in FIG. 4
  • FIG. 6 is a cross-sectional view taken along line BB in FIG. 5.
  • 7 is an enlarged view of the broken line circle C in FIG. 6
  • FIG. 11 is a cross-sectional view taken along line EE in FIG. 10, and FIG. 12 is a second cross-sectional view for explaining the [correction recess forming process].
  • 12A and 12B respectively show cross-sectional views corresponding to FIG. 11 of the press device.
  • the ACG starter 10 shown in FIGS. 1 and 2 corresponds to a rotating electric machine in the present invention, and is used in a starter and a generator for a motorcycle (not shown) or the like.
  • the ACG starter 10 employs the same structure as an outer rotor type brushless motor.
  • the ACG starter 10 is formed into a generally flat disk shape as a whole, and is provided at the axial end of a crankshaft (rotating shaft) CS that forms the rotating part of the engine.
  • the ACG starter 10 includes a stator 20 that is fixed inside a crankcase (not shown), and a rotor that is fixed to a crankshaft CS and rotates with respect to the stator 20. )30.
  • a plurality of trigger protrusions 33a are provided on the radially outer side of the rotor 30 so as to be lined up in the circumferential direction. These trigger protrusions 33a are for obtaining a trigger signal indicating the rotational state of the crankshaft CS, and a magnetic sensor MS is provided on the outside in the radial direction.
  • the magnetic sensor MS is, for example, a Hall element, fixed inside the crankcase, and electrically connected to an on-vehicle controller (not shown).
  • the plurality of trigger protrusions 33a are magnetized by a plurality of permanent magnets MG provided inside the rotor 30 in the radial direction, so that the magnetic sensor MS generates a pulse signal (rectangular) every time it faces the trigger protrusion 33a. wave). Therefore, when operating as a starter, a driving current is supplied to the ACG starter 10, the crankshaft CS is rotated as the rotor 30 rotates, and the plug and fuel pump are operated at predetermined ignition timing and fuel injection timing. Then the engine is started. On the other hand, when operating as a generator, the plug and fuel pump operate at predetermined ignition timing and fuel injection timing to continuously drive the engine, and as the crankshaft CS rotates, the rotor 30 is rotated to generate electricity. be done.
  • the stator 20 includes a core 21 formed by laminating a plurality of steel plates (ferromagnetic materials).
  • the core 21 includes a main body portion 21a formed in an annular shape and a plurality of teeth 21b projecting radially outward from the main body portion 21a in the radial direction. Note that in FIG. 2, a broken line is drawn at the boundary between the main body portion 21a and the teeth 21b. Specifically, a total of 18 teeth 21b are provided (see FIG. 1), and the base end portions of the teeth 21b are integrally connected to the main body portion 21a. In other words, the core 21 is provided with a total of 18 slots SL (see FIG. 1).
  • coils CL corresponding to the U phase, V phase, and W phase are arranged in order in the circumferential direction of the core 21, respectively.
  • the coils CL corresponding to the U phase, V phase, and W phase are each wound around the teeth 21b in concentrated winding.
  • Conductive wires CD are electrically connected to the coils CL corresponding to the U-phase, V-phase, and W-phase, respectively, so that drive current is sequentially supplied from the on-board controller to the three-phase coils CL. .
  • the coil CL is shaded in order to make the arrangement of the coil CL easier to understand.
  • an insulator 22 made of an insulator such as plastic is attached to each tooth 21b.
  • the insulator 22 is thin and covers the periphery of the teeth 21b and the outer peripheral portion of the main body portion 21a. Thereby, the teeth 21b and the coil CL are insulated from each other. That is, the coil CL is wound around the teeth 21b via the insulator 22.
  • the rotor 30 includes a rotor body 31.
  • the rotor main body 31 corresponds to the rotating member in the present invention, and is formed into a substantially bowl shape by pressing a relatively thick steel plate (ferromagnetic material), etc., as shown in FIGS. 2 to 6. ing.
  • the rotor main body 31 includes a bottom wall portion 32 formed in a substantially disk shape, and a cylindrical wall that is integrally provided with the bottom wall portion 32 and rises perpendicularly from the outer peripheral portion of the bottom wall portion 32.
  • a section 33 is provided.
  • a large diameter hole 32a is provided approximately at the center of the bottom wall portion 32.
  • a boss portion 34b of the crankshaft fixing member 34 is inserted into the large diameter hole 32a.
  • a total of six insertion holes 32b are provided around the large diameter hole 32a, and rivets RV (see FIG. 2) are inserted into these insertion holes 32b.
  • a plurality of other holes are also provided in the bottom wall portion 32 for the purpose of weight reduction and the like.
  • crankshaft fixing member 34 to which the axial end of the crankshaft CS is fixed is fixed to the side of the bottom wall portion 32 opposite to the stator 20 side. That is, the crankshaft CS is fixed to the bottom wall portion 32 via the crankshaft fixing member 34.
  • the crankshaft fixing member 34 includes an annular main body 34a formed in a substantially annular shape and a boss portion 34b formed in a substantially cylindrical shape.
  • the annular main body 34a is fixed to the bottom wall portion 32 with a plurality of rivets RV. Further, the boss portion 34b is inserted into the large diameter hole 32a, and an axial end portion of the crankshaft CS is fixed to the boss portion 34b so as not to be relatively rotatable. As a result, the crankshaft CS is rotated as the rotor body 31 rotates, and the rotor body 31 is rotated as the crankshaft CS rotates.
  • the thickness of the crankshaft fixing member 34 is thicker than that of the rotor main body 31, and the weight of the crankshaft fixing member 34 is relatively heavy. This ensures sufficient fixing strength between the ACG starter 10 and the crankshaft CS. Furthermore, the occurrence of uneven rotation during high-speed rotation is suppressed, and the load on both the crankshaft CS and the ACG starter 10 can be reduced. In this way, the crankshaft fixing member 34, including the rotor body 31, functions as a flywheel.
  • each permanent magnet MG is formed in a substantially arc shape (substantially tile shape) following the inner shape of the cylindrical wall portion 33, and is coated with an adhesive or the like (not shown) to the cylindrical wall portion 33. is firmly fixed.
  • a total of eight permanent magnets MG are held down from the radially inner side of the rotor main body 31 toward the cylindrical wall portion 33 by a magnet holder HD formed in a substantially cylindrical shape. Therefore, each permanent magnet MG is more reliably prevented from falling off from the cylindrical wall portion 33.
  • the magnet holder HD is made of a flexible thin stainless steel plate, SP material (cold rolled steel plate), or the like.
  • the cylindrical wall portion 33 is provided with a first region portion AR1 and a second region portion AR2 that are aligned in the circumferential direction. Specifically, 8/9 of the cylindrical wall portion 33 (angle range of 320°) is the first region AR1, and 1/9 of the cylindrical wall portion 33 (angle range of 40° ) is the second area AR2.
  • a total of 16 trigger projections 33a are provided in the first region AR1 of the cylindrical wall portion 33.
  • These trigger protrusions 33a correspond to convex portions in the present invention, and are provided to protrude outward in the radial direction of the cylindrical wall portion 33.
  • the trigger protrusion 33a is used to obtain a trigger signal indicating the rotational state of the crankshaft CS, and, as shown in FIG. 2, faces the magnetic sensor MS in the radial direction of the rotor body 31.
  • a minute gap ⁇ S (about 0.5 mm) is provided between the trigger protrusion 33a and the magnetic sensor MS.
  • the magnetism of the magnetized trigger protrusion 33a can be reliably captured by the magnetic sensor MS while avoiding contact between the trigger protrusion 33a and the magnetic sensor MS.
  • each trigger protrusion 33a is magnetized by the magnetic force of a permanent magnet MG mounted on the radially inner side of the cylindrical wall portion 33.
  • a total of 16 trigger projections 33a are all formed in the same shape, and have a shape that is short in the circumferential direction of the cylindrical wall portion 33 and long in the axial direction of the cylindrical wall portion 33. (approximately rectangular parallelepiped shape). Further, as shown in FIG. 6, these trigger protrusions 33a are arranged at equal intervals (20° intervals) in the circumferential direction of the cylindrical wall 33 within the range of the first region AR1 of the cylindrical wall 33. It is located. Furthermore, all the trigger protrusions 33a are arranged at a portion of the cylindrical wall portion 33 closer to the bottom wall portion 32 in the axial direction, as shown in FIG.
  • the trigger protrusion 33a protrudes outward in the radial direction of the cylindrical wall portion 33, and its protrusion height H is relative to the wall thickness T of the cylindrical wall portion 33. They have approximately the same size (H ⁇ T). Note that a total of 16 trigger protrusions 33a are formed by the first press device 40 shown in FIGS. 9 to 11.
  • a recess 33b having a depth of d1 is provided on the radially inner side (lower side in the figure) of the portion of the cylindrical wall portion 33 corresponding to the trigger protrusion 33a.
  • the recess 33b corresponds to a second recess in the present invention, and is depressed toward the radially outer side (upper side in the figure) of the cylindrical wall portion 33.
  • the depth d1 of the recess 33b is deeper than the depth d2 of the correction recess 33c (see FIG. 8) provided in the second region AR2 (d1>d2).
  • the recess 33b is a depressed portion pressed by the tip 44a of the punch 44 of the first press device 40 (see FIGS. 9 to 11), and thereby protrudes outward in the radial direction of the cylindrical wall 33.
  • the trigger protrusion 33a is formed.
  • the protrusion height H of the trigger protrusion 33a is adjusted by adjusting the depth dimension d1 of the recess 33b (adjusting the pushing amount of the punch 44).
  • the second region AR2 of the cylindrical wall portion 33 is provided with a total of two correction recesses 33c.
  • These correction recesses 33c correspond to the first recesses in the present invention, are provided on the radially inner side of the cylindrical wall portion 33, and are depressed toward the radially outer side of the cylindrical wall portion 33.
  • the pair of correction recesses 33c are provided to remove (correct) distortion of the cylindrical wall portion 33 that occurs when the trigger protrusion 33a is formed in the first region AR1, and the correction recesses 33c are provided in the second region AR2.
  • the trigger protrusions 33a (recesses 33b) and the correction recesses 33c are both arranged at equal intervals (20° intervals) in the circumferential direction of the cylindrical wall portion 33. This makes it possible to make the cylindrical wall portion 33 closer to a perfect circle with higher accuracy. However, depending on the accuracy (roundness) required for the cylindrical wall portion 33, one correction recess 33c, or three or more correction recesses 33c may be provided.
  • a total of two correction recesses 33c are formed in the same shape, and have a shape that is short in the circumferential direction of the cylindrical wall portion 33 and long in the axial direction of the cylindrical wall portion 33. (approximately rectangular parallelepiped shape). Further, as shown in FIG. 6, these correction recesses 33c are spaced apart from each other by 20° in the circumferential direction of the cylindrical wall 33 within the second region AR2 of the cylindrical wall 33. It is located. Further, as shown in FIG. 3, the pair of correction recesses 33c are arranged in a portion of the cylindrical wall portion 33 closer to the bottom wall portion 32 in the axial direction, similarly to the trigger protrusion 33a.
  • the depth d2 of the correction recess 33c is shallow enough to prevent the cylindrical wall 33 from protruding outward in the radial direction (d2 ⁇ d1).
  • the depth d2 of the correction recess 33c is set to be less than half the depth d1 of the recess 33b.
  • the outer diameter OD1 of the portion of the cylindrical wall 33 corresponding to the correction recess 33c is the same as the outer diameter OD2 of the portion of the cylindrical wall 33 where the trigger protrusion 33a and the correction recess 33c are not provided.
  • the correction recess 33c is formed for the sole purpose of improving the roundness of the cylindrical wall 33, and the portion of the cylindrical wall 33 corresponding to the correction recess 33c is shaped like a cylinder like the trigger protrusion 33a.
  • the shaped wall portion 33 does not protrude outward in the radial direction. Therefore, in the portion of the cylindrical wall portion 33 where the correction recess 33c is provided (the second region AR2 portion), the magnetic sensor MS does not detect magnetism and does not generate a pulse signal (rectangular wave).
  • correction recess 33c is a depressed portion pressed by the tip 44a of the punch 44 of the second press device 50, and the depth dimension d2 of the correction recess 33c is the same as that of the punch 44 of the second press device 50. It is adjusted by adjusting the amount of push.
  • both the first and second press devices 40 and 50 correspond to the press device in the present invention.
  • the first press device 40 shown in FIGS. 9 to 11 is a device for forming the trigger protrusion 33a (recess 33b) in the first region AR1 (see FIG. 6) of the cylindrical wall portion 33.
  • the first press device 40 includes a bottom base 41 fixed to a factory floor or the like (not shown), and an upper base 42 arranged above the bottom base 41.
  • a punch holder 43 is movably provided on the bottom base 41.
  • the punch holder 43 moves toward or away from the upper base 42 by the driving force of a drive mechanism (not shown).
  • a punch 44 that forms the trigger protrusion 33a (recess 33b) is fixed to the punch holder 43.
  • the punch 44 has a tip 44a that forms the recess 33b, and the punch holder 43 holds the punch 44 so that the tip 44a faces the upper base 42 side.
  • a work set member 45 formed in a substantially disk shape is attached to the front side of the punch holder 43 (left side in FIG. 9).
  • the work set member 45 is a portion that supports the cylindrical wall portion 33 of the rotor main body 31 (work W) before the trigger protrusion 33a (recess 33b) and correction recess 33c are formed.
  • the punch 44 can be slidably contacted with the work setting member 45, and the work setting member 45 has a function of guiding the movement of the punch 44.
  • a location plate 46 formed in a substantially disk shape is rotatably provided on the further front side of the work set member 45.
  • the location plate 46 is a portion that rotates with respect to the punch 44 by the driving force of a drive mechanism (not shown).
  • the work W supported by the work setting member 45 can be fixed to the location plate 46 by pinning (not shown).
  • the location plate 46 has a function of rotating the work W at every predetermined angle (every pitch of the trigger protrusion 33a).
  • a stripper member 47 is provided on the upper base 42 side of the punch holder 43. Further, a coil spring (not shown) is provided between the stripper member 47 and the punch holder 43. Thereby, the stripper member 47 is urged toward the upper base 42 by the spring force of the coil spring. Note that after forming the trigger protrusion 33a (recess 33b), the stripper member 47 rises due to the spring force of the coil spring, and detaches the workpiece W (rotor main body 31) stuck to the tip 44a of the punch 44. (remove) function.
  • a backing plate 48 is fixed to the bottom base 41 side of the upper base 42. Further, a holed die 49 is fixed to the bottom base 41 side of the backing plate 48.
  • the backing plate 48 is a part that receives processing load during operation of the first press device 40, and is a high-strength component.
  • the holed die 49 is provided with a hole 49a extending in the direction of movement of the punch 44, and the hole 49a faces the tip 44a of the punch 44 in the direction of movement of the punch 44. This allows the trigger protrusion 33a to be formed so as to protrude outward in the radial direction of the cylindrical wall portion 33.
  • a first gap L1 is formed between the workpiece W and the holed die 49.
  • a second gap L2 is formed between the punch holder 43 and the stripper member 47, which is slightly narrower than the first gap L1 (L2 ⁇ L1).
  • the second press device 50 shown in FIG. 12 is a device for forming the correction recess 33c in the second region AR2 (see FIG. 6) of the cylindrical wall portion 33. That is, the second press device 50 has a function of correcting the cylindrical wall portion 33 (rotor main body 31) that has been distorted through processing by the first press device 40 so that it approaches a perfect circle.
  • the second press device 50 differs from the first press device 40 in that it includes a die 51 that does not have a hole.
  • the same structure as the first press device 40 is adopted. Therefore, in FIG. 12, the same parts as those of the first press device 40 are given the same reference numerals, and detailed explanation thereof will be omitted.
  • the feed amount (push amount) of the punch 44 is controlled to be smaller than that in the first press device 40. This makes it possible to form a correction recess 33c having a depth d2 shallower than the recess 33b (depth d1) on the radially inner side of the cylindrical wall 33 (d2 ⁇ d1).
  • [Work set process] corresponds to the first process in the present invention.
  • a work W manufactured in advance in another manufacturing process is prepared.
  • the workpiece W refers to the rotor main body 31 before the trigger protrusion 33a (recess 33b) and correction recess 33c (see FIG. 6) are formed.
  • the prepared workpiece W is placed on the workpiece setting member 45 so as to face the front side of the location plate 46 in the first press device 40, as shown by the arrow M1 in FIG. Then, the bottom wall portion 32 of the workpiece W is fixed to the location plate 46 by pinning.
  • Trigger projection forming process corresponds to the second step in the present invention.
  • Trigger protrusion forming step First, as shown by arrow M2 in FIG. 9, the first press device 40 is operated to raise the punch holder 43 by the first gap L1. Then, the outer peripheral portion of the cylindrical wall portion 33 of the work W is abutted against the lower surface (the surface on the bottom base 41 side) of the holed die 49.
  • the punch holder 43 is raised. Specifically, the punch holder 43 is further raised by the second gap L2 shown in FIG. Then, as shown in FIGS. 10 and 11, the tip 44a of the punch 44 bites into a predetermined location on the radially inner side of the cylindrical wall 33, and the cylindrical wall 33 is plastically deformed to form the recess 33b. be done. The portion pushed out by the tip 44a of the cylindrical wall portion 33 escapes into the hole 49a of the holed die 49. As a result, the trigger protrusion 33a is formed so as to protrude outward in the radial direction of the cylindrical wall portion 33.
  • the above-described operation of forming the trigger protrusions 33a is repeated as many times as the number of trigger protrusions 33a required. Specifically, as shown in FIG. 11, the location plate 46 is rotated by 20 degrees in the direction of the arrow RT, and a total of Sixteen trigger protrusions 33a are formed at 20° intervals.
  • the tip 44a of the punch 44 is pressed toward the cylindrical wall 33 with a strong force and bites into the cylindrical wall 33 to form a recess 33b having a depth d1.
  • the stripper member 47 presses the cylindrical wall portion 33 upward due to the spring force of the coil spring. Therefore, the tip 44a of the punch 44 easily comes off the recess 33b of the cylindrical wall 33.
  • [Correction recess forming process] corresponds to the third step in the present invention.
  • the workpiece W that has completed the [trigger protrusion forming process] is first set in the second press device 50, either manually by the operator or automatically by the arm robot ( (See Figure 12).
  • the workpiece W is held by the workpiece setting member 45 and the location plate 46 (not shown) of the second press device 50 so that the second region AR2 provided on the cylindrical wall portion 33 faces the die 51. be done.
  • the distortion of the cylindrical wall 33 caused by forming the trigger protrusion 33a (recess 33b) in the first region AR1 of the cylindrical wall 33 is corrected by forming the correction recess 33c in the second region AR2 of the cylindrical wall 33, and the roundness of the cylindrical wall 33 (work W) is improved.
  • a trigger signal is provided in the first region AR1 of the cylindrical wall 33, protruding outward in the radial direction of the cylindrical wall 33, and indicating the rotational state of the crankshaft CS.
  • a total of 16 trigger protrusions 33a are provided in the second region AR2 of the cylindrical wall 33, and are provided on the radially inner side of the cylindrical wall 33.
  • a total of two correction recesses 33c recessed outward in the direction are provided.
  • a recess 33b having a depth d1 deeper than the depth d2 of the correction recess 33c is provided on the radially inner side of the cylindrical wall portion 33 and in a portion corresponding to the trigger protrusion 33a. It is provided. Thereby, by pressing the punch 44 from the radially inner side to the radially outer side of the cylindrical wall portion 33, both the trigger protrusion 33a and the correction recess 33c can be formed, and the work efficiency can be improved. Become.
  • the outer diameter dimension OD1 of the portion of the cylindrical wall portion 33 corresponding to the correction recess 33c is the same as that of the portion of the cylindrical wall portion 33 where the trigger protrusion 33a and the correction recess 33c are not provided. It has the same dimension as the outer diameter dimension OD2.
  • the present invention is not limited to the embodiments described above, and can be modified in various ways without departing from the spirit thereof.
  • the ACG starter 10 having a total of 8 permanent magnets MG and a total of 18 teeth 21b (slots SL) has been described as an example, but the present invention is not limited to this.
  • the number of permanent magnets MG and teeth 21b (slots SL), as well as the number of trigger protrusions 33a and correction recesses 33c can be arbitrarily set according to the specifications required for the ACG starter.
  • both the trigger protrusion 33a and the correction recess 33c are formed using two press devices (the first press device 40 and the second press device 50).
  • both the trigger protrusion 33a and the correction recess 33c can be formed by using one first press device 40 and controlling the feed amount of the punch 44 with high precision.
  • the correction recess 33c it is ensured that no protrusion is formed on the radially outer side of the cylindrical wall 33 as much as possible. Even if a protrusion is formed, the height of the protrusion is kept low so that the magnetic sensor MS (see FIG. 2) does not detect the magnetism of the part.
  • the ACG starter 10 is described as being used in starters and generators for motorcycles, etc.; It can also be applied to ACG starters used in outboard motors of ships, etc.
  • each component in the above embodiments is arbitrary as long as the present invention can be achieved, and are not limited to the above embodiments.
  • ACG starter (rotating electric machine), 20: stator, 21: core, 21a: main body, 21b: teeth, 22: insulator, 30: rotor, 31: rotor main body (rotating member), 32: bottom wall part, 32a: large diameter hole, 32b: insertion hole, 33: cylindrical wall part, 33a: trigger protrusion (convex part), 33b: recessed part (second recessed part), 33c: correction recessed part (first recessed part), 34: Crankshaft fixing member, 34a: annular body, 34b: boss, 40: first press device (press device), 41: bottom base, 42: upper base, 43: punch holder, 44: punch, 44a: tip, 45: Work set member, 46: Location plate, 47: Stripper member, 48: Backing plate, 49: Die with hole, 49a: Hole, 50: Second press device (press device), 51: Die, AR1: First area, AR2: second area, CD: conductive wire, CL: coil, CS: crankshaft (rotating shaft),

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

La présente invention augmente suffisamment la rondeur dans un élément rotatif qui affiche des convexités qui servent à obtenir un signal de déclenchement.　Une première section régionale AR1 d'une paroi cylindrique 33 est pourvue d'un total de 16 saillies de déclenchement 33a qui font saillie radialement vers l'extérieur de la paroi cylindrique 33 et qui servent à obtenir un signal de déclenchement indiquant un état de rotation d'un vilebrequin ; et une seconde section régionale AR2 de la paroi cylindrique 33 est pourvue d'un total de deux évidements correctifs 33c qui sont disposés radialement vers l'intérieur de la paroi cylindrique 33 et qui sont en retrait radialement vers l'extérieur de la paroi cylindrique 33. La présence des évidements correctifs 33c corrige la paroi cylindrique 33 de façon à approcher un cercle parfait, ce qui permet d'augmenter suffisamment la rondeur d'un corps de rotor 31 qui comporte les saillies de déclenchement 33a servant à obtenir le signal de déclenchement.
PCT/JP2023/008460 2022-03-29 2023-03-07 Machine électrique tournante et son procédé de fabrication WO2023189264A1 (fr)

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JP2022053278A JP2023146203A (ja) 2022-03-29 2022-03-29 回転電機およびその製造方法

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57133291U (fr) * 1981-02-14 1982-08-19
WO2006013907A1 (fr) * 2004-08-03 2006-02-09 Mitsuba Corporation Appareil pour former des projections de déclanchement dans le volant, et une méthode pour produire des projections pour le déclanchement
JP2007129818A (ja) * 2005-11-02 2007-05-24 Mitsubishi Electric Corp 磁石発電機
WO2020255730A1 (fr) * 2019-06-18 2020-12-24 株式会社ミツバ Générateur de démarrage et procédé de fabrication d'un générateur de démarrage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57133291U (fr) * 1981-02-14 1982-08-19
WO2006013907A1 (fr) * 2004-08-03 2006-02-09 Mitsuba Corporation Appareil pour former des projections de déclanchement dans le volant, et une méthode pour produire des projections pour le déclanchement
JP2007129818A (ja) * 2005-11-02 2007-05-24 Mitsubishi Electric Corp 磁石発電機
WO2020255730A1 (fr) * 2019-06-18 2020-12-24 株式会社ミツバ Générateur de démarrage et procédé de fabrication d'un générateur de démarrage

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