WO2019189217A1 - Rotor core, rotor, and motor - Google Patents

Rotor core, rotor, and motor Download PDF

Info

Publication number
WO2019189217A1
WO2019189217A1 PCT/JP2019/012930 JP2019012930W WO2019189217A1 WO 2019189217 A1 WO2019189217 A1 WO 2019189217A1 JP 2019012930 W JP2019012930 W JP 2019012930W WO 2019189217 A1 WO2019189217 A1 WO 2019189217A1
Authority
WO
WIPO (PCT)
Prior art keywords
laminated steel
rotor core
steel plate
axial direction
laminated
Prior art date
Application number
PCT/JP2019/012930
Other languages
French (fr)
Japanese (ja)
Inventor
康晶 中原
武 本田
Original Assignee
日本電産株式会社
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 日本電産株式会社 filed Critical 日本電産株式会社
Priority to CN201980022048.3A priority Critical patent/CN111919358B/en
Publication of WO2019189217A1 publication Critical patent/WO2019189217A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets

Definitions

  • the present invention relates to a rotor core, a rotor, and a motor.
  • a conventional electric power steering motor described in Patent Document 1 includes a rotor yoke having an arcuate outer periphery, a magnet embedded in the rotor yoke, and both sides of the short side of the magnet in a virtual plane orthogonal to the central axis. And a flux barrier composed of a through hole penetrating the rotor yoke. With this configuration, the flux barrier can be used to suppress or block the passage of magnetic flux. Therefore, it can be expected that the magnetic flux smoothly flows between the rotor and the stator.
  • Patent Document 1 the conventional electric power steering motor described in Patent Document 1 is concerned that magnetic flux leakage may occur in the region of the steel plate existing between the flux barriers adjacent in the circumferential direction.
  • the electric power steering motor when magnetic flux leakage occurs, a magnetic flux loop is formed inside the rotor core, and there is a concern that the magnetic flux of the magnet cannot be used effectively.
  • the present invention has been made in view of the above points, and an object of the present invention is to provide a rotor core, a rotor, and a motor that can make more effective use of magnetic flux of a magnet.
  • An exemplary rotor core according to the present invention includes a first laminated steel plate and a second laminated steel plate that extend in a radial direction with respect to a central axis, and the first laminated steel plate is a first one located radially outside the central axis.
  • a second laminated steel sheet comprising: a base portion; and a plurality of piece-like portions disposed at a predetermined interval in the circumferential direction and spaced apart from each other through a through portion on a radially outer side of the first base portion.
  • the annular portion has a large-diameter portion and a small-diameter portion having different outer diameters, the large-diameter portion and the small-diameter portion are alternately arranged in the circumferential direction, and a plurality of the first laminated steel plates, One piece of the second laminated steel sheet is laminated in the axial direction, and the piece-like part is a first caulking part protruding in the axial direction.
  • An exemplary rotor of the present invention includes the rotor core configured as described above, and a plurality of magnets arranged in the penetrating portion of the rotor core.
  • the rotor core has a plurality of space portions that are respectively disposed between the through portions adjacent to each other in the circumferential direction.
  • the space portion penetrates the rotor core in the axial direction.
  • the penetrating portion is constituted by the first base portion and the piece-like portion, and the second base portion and the annular portion.
  • An exemplary motor of the present invention has the rotor configured as described above.
  • the magnetic flux of the magnet can be used more effectively.
  • FIG. 1 is a plan view of a motor according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of the rotor core of the motor according to the first embodiment of the present invention as seen from above.
  • FIG. 3 is a perspective view of the rotor core of the motor according to the first embodiment of the present invention as seen from below.
  • FIG. 4 is a plan view of the first laminated steel sheet of the rotor core according to the first embodiment of the present invention.
  • FIG. 5 is a plan view of the second laminated steel plate of the rotor core according to the first embodiment of the present invention.
  • FIG. 6 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from above.
  • FIG. 1 is a plan view of a motor according to a first embodiment of the present invention.
  • FIG. 2 is a perspective view of the rotor core of the motor according to the first embodiment of the present invention as seen from above.
  • FIG. 3 is a
  • FIG. 7 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from below.
  • FIG. 8 is a plan view of a connected laminated steel sheet of rotor cores according to the second embodiment of the present invention.
  • FIG. 9 is a partially enlarged plan view of a connected laminated steel sheet of rotor cores according to a third embodiment of the present invention.
  • FIG. 10 is a perspective view showing an example of a cutting device used in the method for manufacturing a rotor core according to the third embodiment of the present invention.
  • FIG. 11 is a partially enlarged plan view showing an example of a cutting tool used in the rotor core manufacturing method according to the third embodiment of the present invention.
  • FIG. 12 is a partially enlarged plan view of a connected laminated steel sheet showing a first example of a cutting step of the method for manufacturing a rotor core according to the third embodiment of the present invention.
  • FIG. 13 is a top view of the connection laminated steel plate which shows the 2nd example of the cutting process of the manufacturing method of the rotor core which concerns on 3rd Embodiment of this invention.
  • FIG. 14 is a top view of the connection laminated steel plate which shows the 3rd example of the cutting process of the manufacturing method of the rotor core which concerns on 3rd Embodiment of this invention.
  • FIG. 15 is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the top.
  • FIG. 13 is a top view of the connection laminated steel plate which shows the 2nd example of the cutting process of the manufacturing method of the rotor core which concerns on 3rd Embodiment of this invention.
  • FIG. 14 is a top view of the connection laminate
  • FIG. 16 is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the bottom.
  • FIG. 17 is a plan view of a laminated laminated steel sheet of rotor cores according to a fourth embodiment of the present invention.
  • FIG. 18 is a perspective view of a rotor core of a motor according to a fifth embodiment of the present invention as viewed from above.
  • FIG. 19 is a perspective view of a rotor core of a motor according to the fifth embodiment of the present invention as seen from below.
  • FIG. 20 is a plan view of a laminated laminated steel sheet for rotor cores according to a fifth embodiment of the present invention.
  • FIG. 21 is a perspective view of a first modification of the rotor core according to the fifth embodiment of the present invention as seen from above.
  • FIG. 22 is a perspective view of a first modification of the rotor core according to the fifth embodiment of the present invention viewed from below.
  • FIG. 23 is a longitudinal end view showing a first step in a method for manufacturing a second modification of the rotor core according to the fifth embodiment of the present invention.
  • FIG. 24 is a longitudinal end view showing a second step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention.
  • FIG. 25 is a longitudinal end view showing a third step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention.
  • FIG. 26 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from above.
  • FIG. 27 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from below.
  • FIG. 28 is a plan view of the first laminated steel sheet of the rotor core according to the sixth embodiment of the present invention.
  • FIG. 29 is a plan view of a second laminated steel plate of the rotor core according to the sixth embodiment of the present invention.
  • FIG. 30 is a top perspective view of the rotor of the motor according to the seventh embodiment of the present invention.
  • FIG. 31 is a plan view of a rotor of a motor according to a seventh embodiment of the present invention.
  • FIG. 32 is a plan view of a first laminated steel sheet according to a modification of the present invention.
  • FIG. 33 is a cross-sectional view of the first caulking portion of the first laminated steel sheet according to the modified example of the present invention.
  • FIG. 34 is a plan view of a second laminated steel sheet according to a modification of the present invention.
  • FIG. 35 is a cross-sectional view of the second caulking portion of the second laminated steel sheet according to the modification of the present invention.
  • FIG. 36 is a plan view of a connected laminated steel sheet according to a modification of the present invention.
  • FIG. 37 is a cross-sectional view of a connection crimping portion of a connection laminated steel sheet according to a modification of the present invention.
  • FIG. 38 is a cross-sectional view of a rotor of a motor according to a modification example of the present invention.
  • FIG. 39 is a partially enlarged view of a cross section of a rotor of a motor according to a modification of the present invention.
  • the direction in which the rotation axis of the motor extends is simply referred to as “axial direction”
  • the direction perpendicular to the rotation axis centered on the rotation axis of the motor is simply referred to as “radial direction”
  • the rotation axis of the motor is the center.
  • the direction along the circular arc is simply called “circumferential direction”.
  • the central axis of the rotor core coincides with the rotation axis of the motor.
  • FIG. 1 is a plan view of a motor according to an embodiment of the present invention.
  • a motor 1 shown in FIG. 1 has a stator 2 and a rotor 3.
  • the stator 2 has, for example, a cylindrical shape that extends in the axial direction.
  • the stator 2 is arranged with a predetermined gap on the radially outer side of the rotor 3.
  • the stator 2 includes a stator core 21, an insulator 22, and a coil 23. *
  • the stator core 21 has a cylindrical shape extending in the axial direction.
  • the stator core 21 is formed by laminating a plurality of magnetic steel plates in the axial direction.
  • the stator core 21 has a core back 21a and teeth (not shown).
  • the core back 21a has an annular shape.
  • the teeth extend radially inward from the inner peripheral surface of the core back 21a.
  • a plurality of teeth are provided side by side at a predetermined interval in the circumferential direction. *
  • the insulator 22 is provided so as to surround the outer surface of the teeth.
  • the insulator 22 is disposed between the stator core 21 and the coil 23.
  • the insulator 22 is made of, for example, an electrically insulating member made of synthetic resin.
  • the coil 23 is formed, for example, by winding a conductive wire around the outer periphery of the insulator 22. *
  • the rotor 3 has a cylindrical shape extending in the axial direction.
  • the rotor 3 is arranged with a predetermined gap on the radially inner side of the stator 2.
  • the rotor 3 includes a shaft 31, a rotor core 40, a magnet 32, and a space portion 33 or a resin portion 34.
  • the space portion 33 includes a column portion 33a and an outer peripheral portion 33b.
  • the shaft 31 is a rotating shaft of the motor 1.
  • the shaft 31 has a columnar shape extending in the vertical direction.
  • the shaft 31 is inserted into an upper bearing and a lower bearing (both not shown) provided above and below the rotor 3 and is rotatably supported.
  • the rotor 3 rotates around a shaft 31 extending in the vertical direction.
  • the rotor core 40 has a cylindrical shape extending in the axial direction.
  • the shaft 31 is inserted into the holes 41 d and 42 d located at the radial center of the rotor core 40.
  • the central axis of the rotor core 40 coincides with the shaft 31 of the motor 1.
  • the rotor core 40 is configured by, for example, laminating a plurality of magnetic steel plates in the axial direction. Details of the rotor core 40 will be described later. *
  • the magnet 32 is disposed on the radially inner side of the outer edge portion of the rotor core 40.
  • a plurality of magnets 32 are arranged side by side at a predetermined interval in the circumferential direction. For example, eight magnets 32 are provided.
  • the magnet 32 is a rectangular parallelepiped having a substantially rectangular bottom surface and extending in the axial direction.
  • the axial length of the magnet 32 substantially matches the axial length of the rotor core 40.
  • the magnet 32 is supported by the rotor core 40. *
  • the column part 33a is provided between the magnets 32 adjacent to each other in the circumferential direction. For example, when the number of the magnets 32 is 8, the column part 33a is provided in 8 places.
  • the column portion 33a is a rectangular column-shaped space having a substantially trapezoidal bottom surface and extending in the axial direction.
  • the column part 33a penetrates the rotor core 40 in the axial direction.
  • the outer peripheral part 33b is provided in the radial direction outer side of the pillar part 33a.
  • the outer peripheral part 33b is provided in eight places.
  • the outer peripheral portion 33b is a space having a substantially semicircular bottom surface and extending in the axial direction.
  • the resin part 34 is provided in the space part 33. At the outer edge portion of the rotor 3, the resin portion 34 is synthesized in a space portion 33 surrounded by the outer surface of the rotor core 40 and the inner peripheral surface of a mold (not shown) arranged on the radially outer side of the rotor core 40. It is provided by pouring resin, adhesive, or the like. Thereby, the resin part 34 plays a role as a flux barrier.
  • FIG. 2 is a perspective view of the rotor core of the motor 1 according to the first embodiment of the present invention as viewed from above.
  • FIG. 3 is a perspective view of the rotor core of the motor 1 according to the first embodiment of the present invention as viewed from below.
  • FIG. 4 is a plan view of the first laminated steel sheet of the rotor core according to the first embodiment of the present invention.
  • FIG. 5 is a plan view of the second laminated steel plate of the rotor core according to the first embodiment of the present invention.
  • the rotor core 40 shown in FIGS. 2 and 3 includes a first laminated steel plate 41 and a second laminated steel plate 42.
  • the first laminated steel plate 41 and the second laminated steel plate 42 each expand in the radial direction with respect to the central axis of the rotor core 40.
  • the 1st laminated steel plate 41 shown in FIG. 4 has the 1st base part 41a, the penetration part 41b, and the piece-like part 41c.
  • the first base portion 41a is located on the radially outer side of the central axis.
  • the first base portion 41a has a substantially octagonal outer shape.
  • the first base portion 41a has a hole portion 41d through which the shaft 31 penetrates in the axial direction at the center portion in the radial direction.
  • the penetration part 41b is provided on the radially outer side of each of the eight sides of the outer edge part 41w of the first base part 41a.
  • the penetration part 41b is configured as a gap between the first base part 41a and the piece-like part 41c.
  • One magnet 32 is provided for each of the eight through portions 41b (see FIG. 1). *
  • the piece-like portion 41c is arranged on the outer side in the radial direction of the first base portion 41a so as to be separated via the through portion 41b.
  • a plurality of the piece-like portions 41c are arranged at a predetermined interval in the circumferential direction.
  • eight piece-like portions 41c are provided on the radially outer side of each of the eight sides on the outer periphery of the first base portion 41a.
  • the piece-like portion 41 c has a shape in plan view that is centered on the outer side in the radial direction than the axis of the shaft 31 and has a radius smaller than the radius of the rotor 3 and a chord located on the inner side in the radial direction of the arc. And a substantially semicircular shape having a corresponding straight line portion.
  • the straight portion on the radially inner side of the piece-like portion 41c is substantially parallel to the outer edge portion 41w of the first base portion 41a.
  • the first base portion 41a has a convex portion 41e.
  • the convex portion 41e is provided in an angular region between the piece portions 41c adjacent to each other in the circumferential direction with respect to the central axis. That is, the convex portion 41e is provided in a fan-shaped region surrounded by each of the end portions facing each other in the circumferential direction and the central axis of each piece-like portion 41c adjacent in the circumferential direction. In other words, the convex portion 41 e is provided on the column portion 33 a of the rotor 3.
  • An example of a fan-shaped angle region between the piece-like portions 41c adjacent to each other in the circumferential direction with respect to the central axis is drawn with a one-dot chain line in FIG. *
  • the convex portion 41e protrudes radially outward from the outer edge portion 41w of the first base portion 41a.
  • convex part 41e protrudes toward the diameter direction outside from each vertex of the 1st base part 41a.
  • the protruding length of the convex portion 41e is shorter than the radial width of the penetrating portion 41b. Since the first base portion 41a has the convex portion 41e, when the magnet 32 is inserted between the first base portion 41a and the piece-like portion 41c, that is, in the through portion 41b, the circumferential direction of the magnet 32 on the convex portion 41e. The ends can be contacted. Thereby, the positioning of the magnet 32 in the circumferential direction can be performed.
  • the second laminated steel plate 42 shown in FIG. 5 has a second base portion 42a, a through portion 42b, and an annular portion 42c.
  • the second base portion 42a is located on the radially outer side of the central axis.
  • the second base portion 42a has a substantially octagonal outer shape.
  • the outer shape of the second base portion 42a is substantially the same as the outer shape of the first base portion 41a.
  • the second base portion 42a has a hole portion 42d through which the shaft 31 penetrates in the axial direction at the center portion in the radial direction. *
  • the through portion 42b is provided on the radially outer side of each of the eight sides on the outer periphery of the second base portion 42a.
  • the through portion 42b is configured as a gap between the second base portion 42a and a large diameter portion 42f of an annular portion 42c described later.
  • One magnet 32 is provided for each of the eight through portions 42b (see FIG. 1). *
  • the annular portion 42c is arranged on the outer side in the radial direction of the second base portion 42a via the through portion 42b.
  • the annular portion 42c extends in the circumferential direction.
  • the annular portion 42c has the same shape as the shape in which the eight piece-like portions 41c of the first laminated steel plate 41 are connected in an annular shape. *
  • the annular portion 42c has a large diameter portion 42f and a small diameter portion 42g having different outer diameters.
  • the large diameter part 42f and the small diameter part 42g are alternately arranged in the circumferential direction. According to this configuration, magnetic saturation is likely to occur in the small diameter portion 42g. Therefore, the magnetic flux can be efficiently guided, and the occurrence of a magnetic flux loop inside the rotor core 40 can be suppressed.
  • the large diameter portion 42f is disposed at the same position as the piece portion 41 of the first laminated steel plate 41 in the axial direction.
  • the large-diameter portion 42f has a substantially oval shape in plan view, similar to the piece-like portion 41c.
  • the large-diameter portion 42f is provided at eight locations on the radially outer side of each of the eight sides on the outer periphery of the second base portion 42a, similarly to the piece-like portion 41c.
  • the linear portion on the radially inner side of the large diameter portion 42f is substantially parallel to the outer peripheral side of the second base portion 42a.
  • the outer diameter of the large diameter part 42f is larger than the outer diameter of the small diameter part 42g. *
  • the small diameter part 42g is arrange
  • the small-diameter portion 42g has a long plate shape in plan view that connects the large-diameter portions 42f adjacent in the circumferential direction.
  • the small diameter portion 42g connects the ends of the two large diameter portions 42f.
  • the outer diameter of the small diameter part 42g is smaller than the outer diameter of the large diameter part 42f. *
  • the small diameter portion 42g has a protruding portion 42h.
  • the protrusion 42h extends radially inward from the inner peripheral surface of the small diameter portion 42g. According to this configuration, the strength of the annular portion 42c can be improved. Further, when the magnet 32 is inserted between the second base portion 42a and the annular portion 42c, that is, in the through portion 42b, the circumferential end portion of the magnet 32 can be brought into contact with the protruding portion 42h. Thereby, it is possible to position the magnet 32 in the circumferential direction. Note that the radial length of the protrusion 42h is shorter than the radial width of the through portion 42b. *
  • two protrusions 42h are provided for one small diameter portion 42g.
  • the two protrusions 42h provided on the small-diameter portion 42g at one location are arranged apart from each other in the circumferential direction. According to this configuration, the region between the two protrusions 42h can be widely used as a flux barrier. Therefore, the magnetic flux of the magnet can be used more effectively.
  • the number of protrusions 42h is not limited to two, and may be one or three or more. *
  • the second base portion 42a has a convex portion 42e.
  • the convex portion 42e is provided in an angle region where the small diameter portion 42g is located with respect to the central axis.
  • the convex part 42e protrudes toward the radial direction outer side from each vertex of the 2nd base part 42a. That is, the convex portion 42e is provided in a fan-shaped region surrounded by both end portions in the circumferential direction of the small diameter portion 42g and the central axis.
  • the convex portion 42 e is provided on the column portion 33 a of the rotor 3.
  • An example of a fan-shaped angle region where the small-diameter portion 42g is located with respect to the central axis is drawn with a one-dot chain line in FIG. *
  • the small-diameter portion 42g is disposed at the same position as the region between the piece-like portions 41c adjacent to each other in the circumferential direction of the first laminated steel plate 41 in the axial direction. Therefore, regarding the rotor core 40, the convex part 42e is provided in the angle area
  • the convex part 42e protrudes radially outward from the outer edge part 42w of the second base part 42a.
  • the tip of the convex portion 42e faces the radially inner side of the small diameter portion 42g.
  • the convex part 42e is arrange
  • the protruding length of the convex part 42e is shorter than the radial width of the through part 42b. Moreover, the convex part 42e does not contact the two projection parts 42h.
  • the second base part 42a has the convex part 42e
  • the magnet 32 when the magnet 32 is inserted between the second base part 42a and the annular part 42c, that is, the through part 42b, the circumferential end of the magnet 32 is provided on the convex part 42e.
  • the parts can be brought into contact. Thereby, the positioning of the magnet 32 in the circumferential direction can be performed.
  • the rotor core 40 shown in FIGS. 2 and 3 is configured by laminating a plurality of first laminated steel plates 41 having the above configuration and at least one second laminated steel plate 42 having the above configuration in the axial direction. At this time, at the position where the piece-like portion 41c of the first laminated steel plate 41 and the large-diameter portion 42f of the annular portion 42c of the second laminated steel plate 42 overlap in the axial direction and a part of the outer peripheral edge is aligned, The steel plate 41 and the second laminated steel plate 42 are laminated. The first laminated steel plate 41 and the second laminated steel plate 42 are fixed by caulking, for example.
  • the circumferential direction between the first base portion 41a and the piece-like portion 41c of the first laminated steel plate 41 and between the second base portion 42a and the annular portion 42c of the second laminated steel plate 42 is provided. There is no area of the steel plate over the entire area. Thereby, flux barriers, such as an air layer, can be provided between the 1st base part 41a and piece-like part 41c, and between the 2nd base part 42a and annular part 42c. Therefore, the magnetic flux of the magnet 32 can be used more effectively.
  • the number of the second laminated steel plates 42 is smaller than the number of the first laminated steel plates 41, it flows through the annular portion 42 c in the entire rotor core 40 as compared with the case where all of the rotor cores 40 are configured by the second laminated steel plates 42.
  • the amount of magnetic flux can be suppressed. Therefore, the magnetic flux of the magnet 32 in the annular portion 42c can be used more effectively.
  • the rotor core 40 has, for example, two second laminated steel plates 42 arranged at each of the upper end and the lower end in the axial direction, and the upper end in the axial direction.
  • a plurality of first laminated steel plates 41 are arranged between the second laminated steel plate 42 and the second laminated steel plate 42 at the lower end in the axial direction.
  • the strength of the rotor core 40 can be improved.
  • two second laminated steel plates 42 are also arranged in the middle part of the plurality of first laminated steel plates 41 laminated in the axial direction. According to this configuration, the strength of the rotor core 40 can be further improved.
  • the rotor core 40 has a first laminated steel plate 41 disposed at each of an upper end and a lower end in the axial direction, and a plurality of first laminated steel plates 41 between the first laminated steel plate 41 at the upper end in the axial direction and the first laminated steel plate 41 at the lower end in the axial direction.
  • positioned the two laminated steel plates 42 may be sufficient.
  • the upper end and the lower end in the axial direction are first laminated steel plates 41.
  • the rotor core 40 may have a structure of a plurality of first laminated steel plates 41, one or two second laminated steel plates 42, and a plurality of first laminated steel plates 41 in order from the top.
  • the rotor core 40 includes, in order from the top, a plurality of first laminated steel plates 41, one or two second laminated steel plates 42, a plurality of first laminated steel plates 41, one or two second laminated steel plates 42, A plurality of first laminated steel plates 41 may be used.
  • the second laminated steel plate 42 is disposed at each of the upper end and the lower end in the axial direction, when the axial length of the magnet 32 is shorter than the axial length of the rotor core 40, it is positioned at the upper end. It is conceivable that the annular portion 42c of the second laminated steel plate 42 is magnetically saturated and the annular portion 42c of the second laminated steel plate 42 located at the lower end is not magnetically saturated. At this time, depending on the presence or absence of magnetic saturation in the annular portion 42c at the upper end and the lower end, the back electromotive force waveform in the coil 23 may have a difference in distortion amount between the upper end and the lower end.
  • the distortion of the counter electromotive voltage waveform can be suppressed by not providing the second laminated steel plate 42 at the upper end and the lower end of the rotor core 40. Instead, a plurality of second laminated steel plates 42 are arranged between the first laminated steel plate 41 at the upper end in the axial direction and the first laminated steel plate 41 at the lower end in the axial direction. While effectively utilizing the magnetic flux, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated.
  • the magnet 32 can be held by pressurizing the annular portion 42c of the second laminated steel plate 42 from the radially outer side. Thereby, since the magnet can be held without providing the resin portion 34, man-hours and materials can be reduced. Furthermore, the column portion 33a can be eliminated by pressurizing the small diameter portion 42g of the annular portion 42c. Thereby, a magnet can be hold
  • FIG. 6 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from above.
  • FIG. 7 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from below.
  • FIG. 8 is a plan view of a connected laminated steel sheet of rotor cores according to the second embodiment of the present invention.
  • the rotor core 40 shown in FIGS. 6 and 7 further includes a connected laminated steel plate 43 in addition to the first laminated steel plate 41 and the second laminated steel plate 42. Similar to the first laminated steel plate 41 and the second laminated steel plate 42, the connected laminated steel plate 43 extends in the radial direction with respect to the central axis of the rotor core 40. *
  • connection laminated steel plate 43 shown in FIG. 8 has a connection base part 43a, a penetration part 43b, a connection annular part 43c, and a connection part 43k.
  • connection base part 43a, the penetration part 43b, and the connection annular part 43c have the same configuration as the second base part 42a, the penetration part 42b, and the annular part 42c of the second laminated steel plate 42, respectively. That is, the connection base part 43a has the hole part 43d and the convex part 43e.
  • the through portion 43b is configured as a gap between the connection base portion 43a and the large diameter portion 43f of the connection annular portion 43c.
  • the connecting annular portion 43c has different outer diameters and includes large-diameter portions 43f and small-diameter portions 43g that are alternately arranged in the circumferential direction. *
  • the convex part 43e of the connection laminated steel plate 43 is larger on the both sides in the circumferential direction than the convex part 41e of the first laminated steel plate 41 and the convex part 42e of the second laminated steel plate 42. And a part of convex part 43e of the connection laminated steel plate 43 overlaps with them under the penetration part 41b of the 1st lamination steel plate 41, and the penetration part 42b of the 2nd lamination steel plate 42. FIG. Thereby, the magnet 32 inserted in the penetration part 41b and the penetration part 42b is hooked on the convex part 43e. Therefore, it is possible to prevent the magnet 32 from falling off the rotor core 40. *
  • the connecting portion 43k is disposed in a region between the connecting base portion 43a and the connecting annular portion 43c with respect to the radial direction.
  • the connecting portions 43k are arranged side by side at a predetermined interval in the circumferential direction.
  • the connection part 43k is arrange
  • the connecting portion 43k has a long plate shape in plan view extending in the radial direction.
  • the connecting portion 43k connects the connecting base portion 43a and the connecting annular portion 43c. More specifically, the connecting portion 43k connects the radial tip end portion of the convex portion 43e and the inner edge portion of the small diameter portion 43g. *
  • the small diameter portion 43g includes two connection portions 43m.
  • the connecting portion 43m is provided adjacent to both sides in the circumferential direction of the connecting portion 43k. That is, the small-diameter portion 43g has two connection portions 43m adjacent to each other in the circumferential direction with respect to one connection portion 43k connected to the inner edge portion.
  • the connecting portion 43m is connected to the large diameter portion 43f on the opposite side of the connecting region with the connecting portion 43k.
  • one connected laminated steel plate 43 is disposed at the lower end in the axial direction.
  • the piece-like portion 41 c of the first laminated steel plate 41, the large-diameter portion 42 f of the annular portion 42 c of the second laminated steel plate 42, and the large-diameter portion 43 f of the connected annular portion 43 c of the connected laminated steel plate 43 are axial.
  • the first laminated steel plate 41, the second laminated steel plate 42, and the connected laminated steel plate 43 are laminated at a position where the outer edge portions are overlapped with each other.
  • the strength of the rotor core 40 can be further improved. Furthermore, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated.
  • the connected laminated steel plates 43 may be disposed at the upper end of the rotor core 40 in the axial direction. Further, the connected laminated steel plates 43 may be disposed on both the lower end and the upper end of the rotor core 40 in the axial direction. According to this configuration, the strength of the rotor core 40 can be further increased. Further, the connected laminated steel plate 43 at the upper end and the connected laminated steel plate 43 at the lower end may have different shapes. For example, the upper end may be a connected laminated steel plate 43 having a penetrating portion through which the magnet 32 is inserted, and the lower end may be a connected laminated steel plate 43 that prevents the magnet 32 from falling off. *
  • FIG. 9 is a partially enlarged plan view of a connected laminated steel sheet of rotor cores according to a third embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first and second embodiments described above, the same reference numerals or the same names as those in the previous embodiment are assigned to the components common to those embodiments. The description may be omitted.
  • connection laminated steel plate 43 shown in FIG. 9 has a small diameter portion 43g, and each of the two connection portions 43m adjacent to the one connection portion 43k in the circumferential direction has a large diameter portion 43f. Disconnected from.
  • the connection part 43m is cut
  • the rotor core 40 according to the third embodiment has a structure in which laminated steel plates obtained by cutting the connection portions 43m of the connected laminated steel plates 43 are laminated in the axial direction. *
  • the connecting portion 43m is cut at a location close to the large diameter portion 43f.
  • the cut connection part 43m is bent inward in the radial direction.
  • the bent connection part 43m is adjacent to the penetrating part 43b side of the connecting part 43k.
  • FIG. 10 is a perspective view showing an example of a cutting device used in the method for manufacturing a rotor core according to the third embodiment of the present invention.
  • FIG. 11 is a partially enlarged plan view showing an example of a cutting tool used in the rotor core manufacturing method according to the third embodiment of the present invention.
  • the manufacturing method of the rotor core 40 of 3rd Embodiment includes the process of laminating
  • the connected laminated steel plates 43 are laminated from the upper end to the lower end in the axial direction.
  • the rotor core 40 of 3rd Embodiment is comprised only with the laminated steel plate from which the connection part 43m of the connection laminated steel plate 43 was cut
  • it is a process including the connection laminated steel plate 43 you may laminate
  • the manufacturing method of the rotor core 40 according to the third embodiment includes a step of cutting the connection portion 43m.
  • a cutting device 100 shown in FIG. 10 is used. *
  • the cutting device 100 includes a pedestal 101, a pressing member 102, and a cutting tool 103.
  • the rotor core 40 is placed on the upper surface of the pedestal portion 101 with the axial direction being substantially vertical.
  • a pressing member 102 is disposed above the rotor core 40.
  • the pressing member 102 holds the rotor core 40 between the upper surface of the pedestal portion 101.
  • the cutting tool 103 is arrange
  • the cutting tool 103 can move along the radial direction of the rotor core 40.
  • the cutting tool 103 can press the outer peripheral surface of the rotor core 40 with the tip portion facing the outer peripheral surface of the rotor core 40. *
  • the cutting tool 103 has a blade portion 103 a shown in FIG. 11 at the tip portion facing the outer peripheral surface of the rotor core 40.
  • the blade portion 103 a extends along the axial direction of the rotor core 40.
  • the blade part 103a is provided in two places spaced apart in the circumferential direction.
  • Each of the two blade portions 103a has a corner portion 103b and a flat surface portion 103c on the outer surface on the outer side in the circumferential direction.
  • the two blade portions 103a respectively cut the two connection portions 43m from the large diameter portion 43f by the corner portion 103b and the flat portion 103c.
  • the manufacturing method of the rotor core 40 of 3rd Embodiment includes the process of cut
  • the state connected in the circumferential direction can be eliminated.
  • disconnection can be suppressed. Therefore, it is possible to suppress the occurrence of a magnetic loop in the rotor core 40.
  • the connected laminated steel plate 43 is cut from the radially outer side to the inner side.
  • the high output press apparatus is not required, but the connection part 43m of the connection annular part 43c can be cut
  • FIG. Therefore, it is possible to suppress an increase in the size and cost of the manufacturing apparatus for the rotor core 40.
  • the manufacturing method of the modification of the rotor core 40 of 2nd Embodiment can shape
  • the manufacturing method of the modified example of the rotor core 40 of the second embodiment cuts from the radially outer side. Therefore, in the laminated steel sheet at the lower end in the axial direction of the rotor core 40, the cutting distance necessary for cutting is shortened. And generation of burrs can be prevented.
  • the method for manufacturing the rotor core 40 of the third embodiment may include a step of removing the connecting portion 43k.
  • production of the magnetic saturation which may generate
  • the structure of the said cutting device 100 demonstrated using FIG.10 and FIG.11 is an example, and another structure may be sufficient if it can cut
  • FIG. 12 is a partially enlarged plan view of a connected laminated steel sheet showing a first example of a cutting step of the method for manufacturing a rotor core according to the third embodiment of the present invention.
  • the cutting tool 103 shown in FIG. 11 is used in the first example of the step of cutting the connection portion 43m.
  • this cutting step shown in FIG. 12 two connecting portions 43m adjacent to each other in the circumferential direction in one connecting portion 43k are cut simultaneously.
  • the two cut connection portions 43m are each bent toward the inside in the radial direction.
  • connection portions 43m are simultaneously cut and bent.
  • the rotor core 40 is rotated around the central axis by an angle between the connecting portions 43k adjacent in the circumferential direction.
  • the two connecting portions 43m adjacent in the circumferential direction in the next one connecting portion 43k are simultaneously cut and bent.
  • the cutting and bending of the two connection portions 43m and the rotation of the rotor core 40 are repeated over the entire outer edge portion of the rotor core 40.
  • connection portions 43m are cut at the same time, the deformation of the rotor core 40, particularly the connection portion 43k, which may occur at the time of cutting, can be suppressed to a minimum. Moreover, at the time of cutting
  • FIG. 13 is a top view of the connection laminated steel plate which shows the 2nd example of the cutting process of the manufacturing method of the rotor core 40 which concerns on 3rd Embodiment of this invention.
  • a cutting tool 104 having only one blade portion 103a is used (see FIG. 13).
  • this cutting step shown in FIG. 13 two connecting portions 43m on the inner side in the circumferential direction are simultaneously cut with respect to the two connecting portions 43k adjacent to each other in the circumferential direction of the connecting annular portion 43c.
  • Each of the two cut connection portions 43m is bent, for example, radially inward.
  • connection portions 43m are simultaneously cut and bent.
  • the rotor core 40 is rotated around the central axis by an angle between the connecting portions 43k adjacent in the circumferential direction.
  • two connecting portions 43m on the inner side in the circumferential direction with respect to the two connecting portions 43k adjacent in the next circumferential direction are simultaneously cut and bent.
  • the cutting and bending of the two connection portions 43m and the rotation of the rotor core 40 are repeated over the entire outer edge portion of the rotor core 40.
  • connection portions 43m are cut at the same time, the deformation of the rotor core 40, particularly the connection portion 43k, which may occur at the time of cutting, can be suppressed to a minimum. Further, it is possible to make the shape and size of the large-diameter portion 43f, which is a region between the two connecting portions 43k adjacent to each other in the circumferential direction of the connecting annular portion 43c uniform.
  • FIG. 14 is a top view of the connection laminated steel plate which shows the 3rd example of the cutting process of the manufacturing method of the rotor core which concerns on 3rd Embodiment of this invention.
  • a cutting tool 104 having only one blade portion 103a is used (see FIG. 14).
  • the two connection portions 43 m disposed on the opposite sides with the central axis being separated from each other are simultaneously cut.
  • Each of the two cut connection portions 43m is bent, for example, radially inward.
  • connection portions 43m are simultaneously cut and bent.
  • the rotor core 40 is rotated around the central axis by an angle between the connecting portions 43k adjacent in the circumferential direction.
  • the two connection portions 43m arranged next to each other on the opposite sides with the central axis are cut and bent at the same time.
  • the cutting and bending of the two connection portions 43m and the rotation of the rotor core 40 are repeated over the entire outer edge portion of the rotor core 40.
  • connection portion 43m since the two connection portions 43m are cut at the same time, the deformation of the rotor core 40, particularly the connection portion 43k, which may occur at the time of cutting, can be suppressed to a minimum.
  • FIG. 15 is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the top.
  • FIG. 16 is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the bottom.
  • FIG. 17 is a plan view of a laminated laminated steel sheet of rotor cores according to a fourth embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first and second embodiments described above, the same reference numerals or the same names as those in the previous embodiment are assigned to components common to those embodiments. The description thereof may be omitted.
  • the rotor core 40 shown in FIGS. 15 and 16 further includes a connected laminated steel plate 44 in addition to the first laminated steel plate 41 and the second laminated steel plate 42. Similar to the first laminated steel plate 41 and the second laminated steel plate 42, the coupled laminated steel plate 44 extends in the radial direction with respect to the central axis of the rotor core 40. *
  • connection laminated steel plate 44 shown in FIG. 17 includes a connection base portion 44a, a through portion 44b, a connection piece-like portion 44c, and a connection portion 44k.
  • connection base portion 44a has a recess 44e.
  • the concave portion 44e is provided in an angular region between the connecting piece-like portions 44c adjacent to each other in the circumferential direction with respect to the central axis. That is, the concave portion 44e is provided in a fan-shaped region surrounded by each of the end portions facing each other in the circumferential direction and the central axis of each of the connecting piece-like portions 44c adjacent in the circumferential direction. In other words, the concave portion 44 e is provided in the column portion 33 a of the rotor 3. An example of a fan-shaped angle region between the connecting piece-like portions 44c adjacent to each other in the circumferential direction with respect to the central axis is depicted by a one-dot chain line in FIG. *
  • the recess 44e is recessed radially inward from the outer edge 44w of the connection base portion 44a.
  • the connection base part 44a is polygonal, the recessed part 44e is dented toward the radial inner side from each vertex of the connection base part 44a.
  • the connecting base portion 44a has the recess 44e, the magnet 32 is inserted into the through portions 41b and 42b, and then the synthetic resin and the adhesive are bonded to the outer sides in the radial direction of the first base portion 41a, the second base portion 42a, and the connecting base portion 44a.
  • an agent or the like is poured, a synthetic resin, an adhesive, or the like enters the recess 44e. Thereby, the connection piece-like part 44c and the magnet 32 can be firmly fixed.
  • the through portion 44b is configured as a gap between the connection base portion 44a and the connection piece portion 44c.
  • Connecting portions 44k are provided on both sides of the through portion 44b in the circumferential direction.
  • the connecting portion 44k overlaps with the lower portion of the penetrating portion 41b of the first laminated steel plate 41 and the penetrating portion 42b of the second laminated steel plate 42.
  • the connecting piece-like portion 44c is arranged on the outer side in the radial direction of the connecting base portion 44a so as to be separated via the through portion 44b.
  • the separation mentioned here includes a form in which the connecting piece-like portion 44c and the connecting base portion 44a are partially connected by the connecting portion 44k.
  • eight connecting piece portions 44c are arranged at predetermined intervals in the circumferential direction.
  • the connecting piece-like portion 44c has a plan view shape whose center is shifted radially outward from the axis of the shaft 31 and has a radius smaller than the radius of the rotor 3, and a chord located on the radially inner side of the arc. And a substantially semicircular shape having a straight line portion corresponding to.
  • the straight portion on the radially inner side of the connecting piece-like portion 44c is substantially parallel to the outer edge portion 44w of the connecting base portion 44a.
  • the connecting portion 44k is disposed in a region between the connecting base portion 44a and the connecting piece-like portion 44c in the radial direction.
  • the connecting portion 44k is provided at each of both ends in the circumferential direction of the connecting piece-like portion 44c with respect to one connecting piece-like portion 44c, and extends in parallel with each other.
  • the connecting portion 44k has a long plate shape in plan view extending in a substantially radial direction.
  • the connecting portion 44k connects the connecting base portion 44a and the connecting piece-like portion 44c. More specifically, the connecting portion 44k connects both circumferential regions of the recessed portion 44e and the straight portions at both ends of the connecting piece-like portion 44c in the circumferential direction.
  • the rotor core 40 shown in FIGS. 15 and 16 includes, for example, two second laminated steel plates 42 disposed at each of the upper end and the lower portion in the axial direction, and the second laminated steel plate 42 at the upper end in the axial direction and the second laminated steel plate 42 at the lower portion in the axial direction.
  • a plurality of first laminated steel plates 41 are arranged between the laminated steel plates 42.
  • two second laminated steel plates 42 are also arranged in the middle part of the plurality of first laminated steel plates 41 laminated in the axial direction.
  • one connected laminated steel plate 44 is disposed at the lower end in the axial direction.
  • the piece-like portion 41c of the first laminated steel plate 41, the large-diameter portion 42f of the annular portion 42c of the second laminated steel plate 42, and the connecting piece-like portion 44c of the connected laminated steel plate 44 overlap in the axial direction.
  • the 1st laminated steel plate 41, the 2nd laminated steel plate 42, and the connection laminated steel plate 44 are laminated
  • the strength of the rotor core 40 can be further improved. Further, when the magnet 32 is inserted into the through portions 41b and 42b, the magnet 32 is hooked on the connecting portion 44k in the axial direction. Thereby, it is possible to prevent the magnet 32 from falling off the rotor core 40. Furthermore, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated. *
  • the connected laminated steel plate 44 may be disposed at the upper end in the axial direction of the rotor core 40. Further, the connected laminated steel plates 44 may be disposed on both the lower end and the upper end of the rotor core 40 in the axial direction. According to this configuration, the strength of the rotor core 40 can be further increased. Further, the upper end connected laminated steel plates 44 and the lower end connected laminated steel plates 44 may have different shapes. For example, the upper end may be a connected laminated steel plate 44 having a through portion through which the magnet 32 is inserted, and the lower end may be a connected laminated steel plate 44 that prevents the magnet 32 from falling off. *
  • the first laminated steel plate 41 has a convex portion 41e
  • the second laminated steel plate 42 has a convex portion 42e
  • the connected laminated steel plate 44 has a concave portion 44e.
  • FIG. 18 is a perspective view of a rotor core of a motor according to a fifth embodiment of the present invention as viewed from above.
  • FIG. 19 is a perspective view of a rotor core of a motor according to the fifth embodiment of the present invention as seen from below.
  • FIG. 20 is a plan view of a laminated laminated steel sheet for rotor cores according to a fifth embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first, second, and third embodiments described above, the same reference numerals or the same names are used for the components common to those embodiments. The description may be omitted.
  • the rotor core 40 shown in FIGS. 18 and 19 further includes a connected laminated steel plate 45 in addition to the first laminated steel plate 41 and the second laminated steel plate 42. Similar to the first laminated steel plate 41 and the second laminated steel plate 42, the connected laminated steel plate 45 extends in the radial direction with respect to the central axis of the rotor core 40. *
  • connection laminated steel plate 45 shown in FIG. 20 has a connection base part 45a, a penetration part 45b, a connection piece part 45c, and a connection part 45k.
  • connection base part 45a, the penetration part 45b, and the connection piece 45c have the same configurations as the connection base part 44a, the penetration part 44b, and the connection piece 44c of the connection laminated steel sheet 44 of the fourth embodiment. That is, the connection base part 45a has the hole part 45d and the recessed part 45e.
  • the through portion 45b is configured as a gap between the connection base portion 45a and the connection piece portion 45c.
  • Connecting portions 45k are provided on both sides of the through portion 45b in the circumferential direction.
  • the connecting portion 45k overlaps with the lower portion of the penetrating portion 41b of the first laminated steel plate 41 and the penetrating portion 42b of the second laminated steel plate 42.
  • the connecting piece-like portion 45c is arranged on the outer side in the radial direction of the connecting base portion 45a via a through portion 45b.
  • the separation referred to here includes a form in which the connecting piece 45c and the connecting base 45a are partially connected by the connecting portion 45k.
  • eight connecting piece portions 45c are arranged at predetermined intervals in the circumferential direction.
  • the connecting piece-like portion 45c has a shape in plan view whose center is shifted radially outward from the axis of the shaft 31 and has a radius smaller than the radius of the rotor 3, and a chord located radially inward of the arc. And a substantially semicircular shape having a straight line portion corresponding to.
  • the straight line portion on the radially inner side of the connecting piece 45c is substantially parallel to the outer edge 45w of the connecting base portion 45a.
  • the connecting portion 45k is arranged in a region between the connecting base portion 45a and the connecting piece-like portion 45c in the radial direction.
  • the connecting portions 45k are provided at two locations on the inner side of both ends of the connecting piece-like portion 45c in the circumferential direction in the straight portion of the connecting piece-like portion 45c at one place, and extend in parallel with each other.
  • the connecting portion 45k connects the outer edge portion 45w of the connecting base portion 45a and the straight portion of the connecting piece-like portion 45c.
  • the connecting portion 45k has a long plate shape in plan view extending in a substantially radial direction. *
  • two second laminated steel plates 42 are disposed at each of the upper end and the lower portion in the axial direction, the second laminated steel plate 42 at the upper end in the axial direction, and the second laminated steel plate 42 at the lower portion in the axial direction.
  • a plurality of first laminated steel plates 41 are arranged between the laminated steel plates 42.
  • two second laminated steel plates 42 are also arranged in the middle part of the plurality of first laminated steel plates 41 laminated in the axial direction.
  • one connected laminated steel plate 45 is disposed at the lower end in the axial direction.
  • the piece-like portion 41c of the first laminated steel plate 41, the large-diameter portion 42f of the annular portion 42c of the second laminated steel plate 42, and the connecting piece-like portion 45c of the connected laminated steel plate 45 overlap in the axial direction, and the outer edge
  • the first laminated steel plate 41, the second laminated steel plate 42, and the connected laminated steel plate 45 are laminated at a position where a part of the parts are aligned.
  • the strength of the rotor core 40 can be further improved. Further, when the magnet 32 is inserted into the through portions 41b and 42b, the magnet 32 is hooked on the connecting portion 45k in the axial direction. Thereby, it is possible to prevent the magnet 32 from falling off the rotor core 40. Furthermore, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated. *
  • the connected laminated steel plates 45 may be disposed at the upper end of the rotor core 40 in the axial direction. Further, the connected laminated steel plates 45 may be disposed at both the lower end and the upper end of the rotor core 40 in the axial direction. According to this configuration, the strength of the rotor core 40 can be further increased. Further, the upper end connected laminated steel plates 45 and the lower end connected laminated steel plates 45 may have different shapes. For example, the upper end may be a connected laminated steel plate 45 having a penetrating portion through which the magnet 32 is inserted, and the lower end may be a connected laminated steel plate 45 that prevents the magnet 32 from falling off. *
  • the first laminated steel plate 41 has a convex portion 41e
  • the second laminated steel plate 42 has a convex portion 42e
  • the connected laminated steel plate 45 has a concave portion 45e.
  • FIG. 21 is a perspective view of a first modification of the rotor core according to the fifth embodiment of the present invention as seen from above.
  • FIG. 22 is a perspective view of the first modification of the rotor core according to the fifth embodiment of the present invention viewed from below.
  • the rotor core 40 shown in FIG.21 and FIG.22 has the connection laminated steel plate 45 further in addition to the 1st laminated steel plate 41 and the 2nd laminated steel plate 42.
  • FIG. The connected laminated steel plate 45 is disposed at the lower end in the axial direction of the rotor core 40.
  • connection laminated steel plate 45 has the connection part 45k as an interposition part interposed between the connection base part 45a and the connection piece-like part 45c.
  • the intervening portion referred to here includes an outward projection provided on the connection base portion 45a, an inward projection provided on the connection piece 45c, and a connection base portion 45a and a connection piece shape. It includes a form in which the space between the portion 45c is filled with a steel plate member.
  • the magnet 32 inserted into the through part 41 b and the through part 42 b is caught by the interposition part in the lower part of the rotor core 40. Therefore, it is possible to prevent the magnet 32 from falling off the rotor core 40. Further, since the connecting base portion 45a and the connecting piece-like portion 45c are connected via the connecting portion 45k, the first base portion 41a and the piece-like portion 41c are also connected to the second base portion 42a and the annular portion 42c. However, it is possible to prevent it from falling apart. *
  • the second laminated steel plate 42 disposed at the upper end in the axial direction of the rotor core 40 includes an outward projection 42 n.
  • the outward projecting portion 42n extends radially outward from the outer edge portion 42w of the second base portion 42a.
  • the protruding length of the outward projecting portion 42n is shorter than the radial width of the penetrating portion 42b.
  • the magnet 32 is inserted into the through portion 41 b and the through portion 42 b below the second laminated steel plate 42 disposed at the upper end in the axial direction of the rotor core 40. *
  • the magnet 32 is caught by the outward projecting portion 42 n at the upper portion of the rotor core 40. Therefore, it is possible to prevent the magnet 32 from falling off the rotor core 40.
  • FIG. 23 is a longitudinal end view showing a first step in a method for manufacturing a second modification of the rotor core according to the fifth embodiment of the present invention.
  • FIG. 24 is a longitudinal end view showing a second step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention.
  • FIG. 25 is a longitudinal end view showing a third step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention.
  • connection laminated steel plate 45 is arrange
  • the connection laminated steel plate 45 is arrange
  • the connecting portion 45 k of the connecting laminated steel plate 45 at the upper end in the axial direction is cut from the upper side in the axial direction of the connecting laminated steel plate 45 toward the inside with respect to the laminated laminated steel plate 45.
  • the cut connection part 45k is bent toward the inside of the through part 45b.
  • the outward projecting portion 45n can be formed by cutting the connecting portion 45k. Note that the inward projection may be formed by a similar cutting process.
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of laminating
  • the divided laminated steel plate corresponds to the first laminated steel plate 41 in which the first base portion 41a and the piece-like portion 41c are divided in the radial direction.
  • a plurality of first laminated steel plates 41 are laminated in the axial direction.
  • the rotor core 40 also includes a plurality of second laminated steel plates 42 having a smaller number of laminated sheets than the first laminated steel plates 41. *
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of further laminating
  • FIG. In this step the laminated laminated steel plate 45 in which the coupling base 45a and the coupling piece 45c are connected via the coupling portion 45k is laminated on the upper end in the axial direction of the laminated first laminated steel plate 41.
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment is the connection laminated steel plate 45 (interposition) in which the connection part 45k which is an interposition part interposes between the connection base part 45a and the connection piece-like part 45c.
  • laminated steel sheet (Laminated steel sheet) is laminated on the lower end of the laminated first laminated steel sheet 41 in the axial direction.
  • the first laminated steel sheet 41c and the connecting laminated steel sheet 45 are connected to each other in a position where the piece-like portion 41c of the first laminated steel plate 41 and the connecting piece-like portion 45c of the connected laminated steel plate 45 overlap in the axial direction. 41 and the laminated laminated steel plate 45 are laminated.
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of cut
  • FIG. In this step the connecting member 45k is cut by the cutting member 200 by inserting the cutting member 200 into the penetrating portion 45b (not shown) of the connected laminated steel plate 45 shown in FIGS. Thereby, the state where the connection base part 45a and the connection piece-like part 45c were connected can be eliminated. Therefore, a flux barrier such as an air layer can be provided between the connection base portion 45a and the connection piece 45c. Thereby, it is possible to reduce a magnetic flux loop. *
  • the cutting member 200 shown in FIG. 23 is made of, for example, metal, and is a rectangular parallelepiped extending in the axial direction, like the magnet 32, having a rectangular cross-sectional shape that intersects the axial direction.
  • a magnet 32 may be used as the cutting member.
  • a member to be used can be reduced and the man-hours until the rotor 3 is formed can be reduced.
  • the fastening strength can be improved.
  • the edge portion on the radially outer side of the cutting member 200 matches the connecting portion with the connecting piece 45c of the connecting portion 45k in the radial direction of the rotor core 40.
  • the cutting member 200 is disposed above the position in the axial direction. *
  • the rotor core 40 has a through portion 50.
  • the penetrating part 50 includes a penetrating part 41b of the first laminated steel sheet 41 and a penetrating part 42b of the second laminated steel sheet 42 that overlap each other in the axial direction, and extends in the axial direction.
  • the penetration part 50 includes a first penetration part 51 and a second penetration part 52.
  • the second penetrating part 52 is narrower in the radial direction than the first penetrating part 51.
  • the second penetrating portion 52 has a radial width that can accommodate only the magnet 32.
  • the first penetrating portion 51 is wider in the radial direction than the second penetrating portion 52.
  • the first penetrating portion 51 has a radial width that can accommodate an outward projecting portion 45n described later in addition to the magnet 32. *
  • the first penetrating portion 51 is formed as a penetrating portion 41b of the predetermined number of first laminated steel plates 41 and a penetrating portion 42b of the second laminated steel plate 42, which are laminated adjacent to the lower surface of the connected laminated steel plates 45 in the upper part of the rotor core 40.
  • the 2nd penetration part 52 is lower than the 1st lamination steel plate 41 and the 2nd lamination steel plate 42 in which the 1st penetration part 51 was provided, penetration part 41b of the 1st lamination steel plate 41, and penetration part of the 2nd lamination steel plate 42 42b is provided. *
  • connection part 45k is cut
  • the cut connection part 45k becomes an outward projection 45n of the connection base part 45a.
  • the outward projection 45n extends radially outward from the outer edge 45w of the connection base portion 45a.
  • the outward projecting portion 45 n is a portion of the base with the connection base portion 45 a and bends toward the first through portion 51. *
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of inserting the magnet 32 in the penetration part 50.
  • the magnet 32 is used as a cutting member, the magnet 32 is continuously inserted in the penetration part 50, after cut
  • the magnet 32 is a connecting portion that is an interposed portion of the laminated laminated steel plate 45 at the lower end in the axial direction at the final stage of insertion into the through portion 50.
  • the upper surface of the part 45k is contacted.
  • the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of forming the resin part 34.
  • the resin portion 34 is provided by pouring synthetic resin, adhesive, or the like into the space portion 33.
  • connection laminated steel plate 45 arranged at the upper end in the axial direction has an outward projection 45n extending radially outward from the outer edge 45w of the connection base portion 45a.
  • a flux barrier such as an air layer or a resin layer 34 can be provided between the connection base portion 45 a and the connection piece 45 c of the connection laminated steel plate 45.
  • the magnetic flux of the magnet 32 can be used more effectively.
  • the outward projecting portion 45n that is, before cutting the connecting portion 45k, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c are separated. This can be prevented.
  • the rotor core 40 may be provided with inward protrusions extending radially inward from the inner edge of the connecting piece 45c instead of the outward protrusion 45n. Further, the rotor core 40 may be provided with both the outward projection 45n and the inward projection.
  • the elastic force presses the magnet 32 outward in the radial direction.
  • positioning in the radial direction of the magnet 32 can be performed.
  • the action of fixing the magnet 32 to the rotor core 40 can be enhanced.
  • a part of the outward projecting portion 45n that is bent is accommodated inside the first through portion 51, so that the insertion of the magnet 32 into the through portion 50 is not obstructed. Therefore, a space for inserting the magnet 32 can be secured in the through portion 50.
  • the thickness of the axial direction of the connection part 45k is connected to the connection base part 45a and connection. You may decide to include the process made thinner than the piece-like part 45c. According to this configuration, the connecting portion 45k can be easily cut. For example, press working may be performed. According to this structure, the form which can cut
  • the connecting portion 45k can be easily cut. For example, push back processing may be performed. According to this structure, the form which can cut
  • FIG. 26 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from above.
  • FIG. 27 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from below.
  • FIG. 28 is a plan view of the first laminated steel sheet of the rotor core according to the sixth embodiment of the present invention.
  • FIG. 29 is a plan view of a second laminated steel plate of the rotor core according to the sixth embodiment of the present invention.
  • the rotor core 40 shown in FIGS. 26 and 27 includes a first laminated steel plate 46 and a second laminated steel plate 47.
  • the first laminated steel plate 46 and the second laminated steel plate 47 each expand in the radial direction with respect to the central axis of the rotor core 40.
  • a first laminated steel plate 46 shown in FIG. 28 has a first base portion 46a, a through portion 46b, and a piece-like portion 46c.
  • the first base portion 46a has a hole 46d and a recess 46e.
  • the second laminated steel plate 47 shown in FIG. 29 has a second base portion 47a, a penetrating portion 47b, and an annular portion 47c.
  • the second base part 47a has a hole 47d and a recess 47e.
  • the annular portion 47c has a large diameter portion 47f and a small diameter portion 47g having different outer diameters.
  • the rotor core 40 shown in FIGS. 26 and 27 is configured by laminating a plurality of first laminated steel plates 46 having the above configuration and at least one second laminated steel plate 47 having the above configuration in the axial direction. At this time, the first laminated steel sheet 46c and the large-diameter part 47f of the annular portion 47c of the second laminated steel sheet 47 overlap in the axial direction, and the first laminated steel sheet 46 is located at a position where a part of the outer peripheral edge is aligned. A steel plate 46 and a second laminated steel plate 47 are laminated.
  • annular part 47c is provided. There is no area of the steel plate over the entire area. Thereby, a flux barrier such as an air layer can be provided between the first base portion 46a and the piece-like portion 46c and between the second base portion 47a and the annular portion 47c. Therefore, the magnetic flux of the magnet 32 can be used more effectively.
  • the whole of the rotor core 40 flows through the annular portion 47 c in the entire rotor core 40 as compared with the case where the second laminated steel plates 47 are configured.
  • the amount of magnetic flux can be suppressed. Therefore, the occurrence of magnetic saturation in the annular portion 47c is suppressed, and the magnetic flux of the magnet 32 can be used more effectively.
  • FIG. 30 is a top perspective view of the rotor of the motor according to the seventh embodiment of the present invention.
  • FIG. 31 is a plan view of a rotor of a motor according to a seventh embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first embodiment described above, the same reference numerals or the same names as those in the first embodiment are assigned to the same constituent elements as those of the first embodiment, and the description thereof is omitted. May be omitted.
  • the rotor 3 shown in FIGS. 30 and 31 has a cylindrical shape extending in the axial direction.
  • the rotor 3 is arranged with a predetermined gap inside the stator 2 (see FIG. 1) in the radial direction.
  • the rotor 3 includes a shaft 31 (not shown), a rotor core 40, a magnet 32, and a space portion 33 or a resin portion 34. *
  • the resin portion 34 is provided by pouring synthetic resin, adhesive, or the like into the space portion 33. Thereby, the resin part 34 plays a role as a flux barrier. Further, since both circumferential ends of the magnet 32 are in contact with the resin portion 34, the magnet 32 can be firmly fixed to the rotor core 40. *
  • the rotor core 40 has a first laminated steel plate 46.
  • the 1st laminated steel plate 46 has the 1st base part 46a, the penetration part 46b, and the piece-like part 46c.
  • the first base portion 46a has a hole 46d and a recess 46e. *
  • the through portion 46b is configured as a gap between the first base portion 46a and the piece-like portion 46c.
  • One magnet 32 is provided in each of the eight through portions 46b.
  • Eight column portions 33a are disposed between the through portions 46b (magnets 32) adjacent to each other in the circumferential direction, and penetrate the rotor core 40 in the axial direction.
  • the circumferential length L1 of the piece-like portion 46c shown in FIG. 31 is shorter than the circumferential length L2 of the magnet 32. According to this configuration, the magnetic characteristics related to the cogging torque can be improved. Therefore, the cogging torque can be reduced. Furthermore, the occurrence of a magnetic flux loop in the rotor core 40 can be suppressed.
  • the recess 46e is provided in an angular region between the pieces 46c adjacent to each other in the circumferential direction with respect to the central axis.
  • the recess 46e is recessed radially inward from the outer edge 46w of the first base portion 46a.
  • annular portions 42c and 47c and the connecting annular portion 43c described in the above embodiment are in a shape that is annularly connected over the entire circumference, but even if a portion of the circumferential direction is locally interrupted. good. *
  • connection laminated steel plate was arrange
  • positioning a connection laminated steel plate to both the lower end and upper end of an axial direction you may arrange
  • the present invention can also be applied to a claw pole type stator or the like as the stator according to the embodiment of the present invention.
  • the 1st laminated steel plate, the 2nd laminated steel plate, and a connection laminated steel plate may have the crimping part which protrudes in the axial direction formed of caulking etc.
  • FIG. 32 is a plan view of the first laminated steel sheet.
  • FIG. 33 is a cross-sectional view of a first caulking portion to be described later.
  • each piece-like portion 341c is formed with a first caulking portion 341p.
  • the first caulking portion 341p includes a first convex portion 341p1 that protrudes to one side in the axial direction and a first concave portion 341p2 that is located on the other side in the axial direction of the first convex portion.
  • the first caulking portion 341p is located substantially at the center in the radial direction and the circumferential direction of the piece-like portion 341c. That is, the 1st convex part 341p1 and the 2nd recessed part 341p2 are located in the approximate center in the radial direction of the piece-shaped part 341c, and the circumferential direction.
  • FIG. 34 is a plan view of the second laminated steel sheet.
  • FIG. 35 is a cross-sectional view of a second caulking portion to be described later.
  • a second crimping portion 342p is formed in each large diameter portion 342c.
  • the second caulking portion 342p includes a second convex portion 342p that protrudes on one side in the axial direction and a second concave portion 342p2 that is located on the other side in the axial direction of the second convex portion 342p.
  • the second caulking portion 342p is disposed approximately at the center in the radial direction and the circumferential direction of the large diameter portion 342c. That is, the 2nd convex part 342p1 and the 2nd recessed part 342p2 are arrange
  • FIG. 36 is a plan view of a connected laminated steel sheet.
  • FIG. 37 is a cross-sectional view of a connecting caulking portion to be described later.
  • each large-diameter portion 345c is formed with a connected crimping portion 345p.
  • the connection crimping part 345p has a connection convex part 345p1 protruding to one side in the axial direction and a connection concave part 345p2 located on the other side in the axial direction of the connection convex part 345p1.
  • connection crimping part 345p is arrange
  • the circumferential direction and radial position of the first crimping portion 341p are substantially the same as the circumferential direction and radial position of the second crimping portion 342p. is there.
  • the first caulking portion 341p overlaps the second caulking portion 342p in the axial direction. More specifically, the first convex portion 341p1 of the first caulking portion 341p fits into the second concave portion 342p2 of the second caulking portion. Alternatively, the second convex portion 342p1 of the second caulking portion 342 is fitted into the first concave portion 341p2 of the first caulking portion 341p. Thereby, the 1st laminated steel plate 341 and the 2nd laminated steel plate 342 can be firmly fixed. *
  • the 1st crimping part 341p of the 1st laminated steel plate 341 adjacent to an axial direction overlaps with an axial direction. That is, the first convex portion 341p1 of the first laminated steel plate 341 located on the other axial side is fitted into the first concave portion 341p2 of the first laminated steel plate 341 located on the one axial side. Thereby, adjacent 1st laminated steel plates 341 can be firmly fixed.
  • the second caulking portions 342p of the second laminated steel plates 342 adjacent in the axial direction overlap with each other in the axial direction. That is, the second convex portion 342p1 located on the other axial side is fitted into the second concave portion 342p2 of the second laminated steel plate 342 located on the one axial side. Thereby, several 2nd laminated steel plates 342 can be firmly fixed.
  • the circumferential and radial positions of the coupled caulking portion 345p are substantially the same as the circumferential and radial positions of the first caulking portion.
  • the connecting caulking portion 345p overlaps the first caulking portion 341p in the axial direction.
  • the connection convex part of the connection crimping part 345p fits into the 1st recessed part 341p2 of the 1st crimping part 341p.
  • the first convex portion 341p1 of the first caulking portion 341 is fitted into the connecting concave portion 345p2 of the connecting caulking portion 345p. Thereby, the connection laminated steel plate 345 can be firmly fixed to the first laminated steel plate 341.
  • the circumferential and radial positions of the coupled crimping portion 345p are substantially the same as the circumferential and radial positions of the second crimping portion 342p.
  • the connecting caulking portion 345p overlaps the second caulking portion 342p in the axial direction. More specifically, the connecting convex portion 345p1 of the connecting caulking portion 345p fits into the second concave portion 342p2 of the second caulking portion 342p. Or the 2nd convex part 342p1 of the 2nd crimping part 342 fits in the connection recessed part 345p2 of the coupling crimping part 345p. Thereby, the connection laminated steel plate 345 can be firmly fixed to the second laminated steel plate 342. *
  • connection laminated steel plates 345 When the connection laminated steel plates 345 are laminated in the axial direction, the connection crimping portions 345p of the connection lamination steel plates 345 adjacent in the axial direction overlap each other in the axial direction. That is, the connecting convex portion 345p1 located on the other axial side is fitted into the connecting concave portion 345p2 of the laminated laminated steel plate 345 located on the one axial side. Thereby, the some connection laminated steel plates 345 can be firmly fixed.
  • the outer shape of the first caulking part 341p, the second caulking part 342p, and the connecting caulking part 345p is, for example, an oval shape or a rectangle with the circumferential direction as the longitudinal direction. That is, the piece-like portion 341c and the large-diameter portion 342c have a shape extending with the circumferential direction as the longitudinal direction.
  • the outer shape of the first caulking portion 341p, the second caulking portion 342p, and the connecting caulking portion 345p into a shape in which the circumferential direction is the longitudinal direction, the number of caulking in each piece-like portion 341c and the large diameter portion 342c is increased. Even if there is only one, the first laminated steel sheets 341, the second laminated steel sheets 342, the first laminated steel sheets 341 and the second laminated steel sheets 342, the connected laminated steel sheets 345, the first laminated steel sheets 341, and the connected laminated steel sheets 345 And the second laminated steel plate 342 or the connected laminated steel plates 345 can be firmly fixed.
  • FIG. 38 is a cross-sectional view of the rotor core 40.
  • FIG. 39 is a partial cross-sectional view of a rotor core including a through portion.
  • one or more second laminated steel plates 342 are stacked on one or more connected laminated steel plates 345 (one axial end side).
  • a plurality of first laminated steel plates 341 are laminated.
  • One or more second laminated steel plates 342 are laminated on the laminated first laminated steel plates 341.
  • a plurality of first laminated steel plates 341 are laminated on the second laminated steel plate 342.
  • One or more second laminated steel sheets 342 are further laminated on the laminated first laminated steel sheets 341.
  • first laminated steel sheets 341 sandwiched between the second laminated steel plates 342 are laminated in the axial direction.
  • the number of first laminated steel sheets 341 sandwiched between the second laminated steel sheets in the axial direction is, for example, about 3 to 10.
  • the thickness of the first laminated steel sheet 341 and the second laminated steel sheet is, for example, about 0.5 to 1.5 mm.
  • connection laminated steel plate 345 arrange
  • positioned at an axial direction other end side does not need to have the connection crimping part 345p.
  • first laminated steel plate 341, the second laminated steel plate 342, and the connected laminated steel plate 345 penetrate through the first caulking portion 341p, the second caulking portion 342p, and the connecting caulking portion 345p in the axial direction.
  • a groove may be formed.
  • a first through groove 341r is formed in the inner wall on the radially inner side of the piece-like portion 341c of the first laminated steel plate 341.
  • the first through groove 341r is recessed toward the radially outer side.
  • the first through groove 341r penetrates the first laminated steel plate 341 in the axial direction.
  • the first through groove 341r communicates with the through part 341b in the radial direction.
  • the first through groove 341r is located at a part of the inner wall constituting the through part 341b.
  • the inner wall constituting the first through groove 341r faces the outer surface of the first base portion 341a in the radial direction.
  • the outer shape of the opening of the first through groove 341r is a shape whose longitudinal direction is the circumferential direction.
  • the outer shape of the first through groove 341r may be a substantially C-shape that opens radially inward.
  • the outer shape of the first through groove 341r is substantially rectangular.
  • a second through groove 342r is formed on the inner wall on the radially inner side of the large-diameter portion 342c of the second laminated steel plate 342 so as to be recessed toward the radially outer side.
  • the second through groove 342r penetrates the second laminated steel plate 342 in the axial direction.
  • the second through groove 342r communicates with the through portion 342b in the radial direction.
  • the second through groove 342r is located at a part of the inner wall constituting the through portion 342b.
  • the inner wall constituting the second through groove 342r faces the outer surface of the second base portion 342a in the radial direction.
  • the outer shape of the opening of the second through groove 342r is a shape whose longitudinal direction is the circumferential direction. Note that when viewed from the axial direction, the outer shape of the opening of the second through groove 342r may be a substantially C-shape that opens radially inward. In the present embodiment, when viewed from the radial direction, the outer shape of the second through groove 342r is substantially rectangular.
  • a connecting through groove 345r that is recessed toward the radially outer side is formed in the inner wall on the radially inner side of the large diameter portion 345c of the connected laminated steel plate 345.
  • the connection through groove 345r penetrates the connection laminated steel plate 345 in the axial direction.
  • the connecting through groove 345r communicates with the through portion 345b in the radial direction.
  • the outer shape of the connecting through groove 345r is a shape whose longitudinal direction is the circumferential direction.
  • the outer shape of the opening of the coupling through groove 345r may be a substantially C-shape that opens radially inward.
  • the outer shape of the coupling through groove 345r is substantially rectangular when viewed from the radial direction.
  • the circumferential direction and the radial direction of the first through groove 341r, the second through groove 342r, and the connected through groove 345r are the same.
  • the 1st laminated steel plate 341, the 2nd laminated steel plate 342, and the connection lamination steel plate 345 are laminated, the 1st penetration slot 341r, the 2nd penetration slot 342r, and the connection penetration slot 345r overlap in the direction of an axis.
  • the first laminated steel plate 341, the second laminated steel plate 342, and the connected laminated steel plate 345 do not necessarily need to have the first through groove 341r, the second through groove 342r, and the connected through groove 345r, respectively.
  • Various laminated steel plates may not have each through groove.
  • a laminated steel sheet having a through groove and a laminated steel sheet not having a through groove may be combined and laminated.
  • a tapered portion 341e1 may be formed in the concave portion 341e of the first laminated steel plate 341. As shown in FIG. 32, when viewed from the axial direction, tapered portions 341e1 are formed at portions on both sides in the circumferential direction of the inner surface constituting the concave portion 341e. That is, the circumferential dimension of the recess 341e gradually decreases from the radially outer side toward the radially inner side.
  • the present invention can be used in, for example, a rotor core, a rotor, and a motor.
  • connection laminated steel plate 43a ... connection base portion, 43b ... through portion, 43c ... connection annular portion, 43d ... hole, 43e ... projection, 43f ... large diameter portion, 43g ... small diameter part, 43k ... connection part, 43m ... connection part, 43w ... outer edge part, 44 ... connection laminated steel sheet, 44a ... connection base part, 44b ... penetration part, 44c: Connecting piece-like portion, 44d: Hole portion, 44e ... Recessed portion, 44k ...
  • second laminated steel sheet 345 ..Connected laminated steel sheets, 341p: first caulking part, 342p: second caulking part, 345p: connecting caulking Part, 341p1 ... first convex part of the first caulking part, 342p1 ... second convex part of the second caulking part, 345p1 ... connecting convex part of the connecting caulking part 341, 341p2 ... first caulking First concave portion, 342p2 ... second concave portion of second caulking portion, 345p2 ... connecting concave portion of connecting caulking portion 341, 341b ... penetrating portion of first laminated steel plate, 342b ...

Abstract

This rotor core has a first laminated steel plate and a second laminated steel plate that extend in a radial direction with respect to a central axis. The first laminated steel plate has: a first base part positioned radially outside the center axis; and a plurality of fragmented parts arranged spaced apart from each other, with penetration parts therebetween, on the radial outside of the first base part and arranged at a predetermined interval in the circumferential direction. The second laminated steel plate has: a second base part positioned radially outside the center axis; and annular parts arranged spaced apart from each other, with penetration parts therebetween, on the radial outside of the second base part and extending in the circumferential direction. The annular parts have large diameter sections and small diameter sections having different outer diameters. The large diameter sections and small diameter sections are alternately arranged in the circumferential direction. The plurality of first laminated steel plates and at least one of the second laminated steel plates are stacked in the axial direction. The fragmented parts have a first caulking section that protrudes in the axial direction. The annular parts have a second caulking section that protrudes in the axial direction and overlaps the first caulking section in the axial direction.

Description

ロータコア、ロータ、及びモータRotor core, rotor, and motor
本発明は、ロータコア、ロータ、及びモータに関する。 The present invention relates to a rotor core, a rotor, and a motor.
従来、励磁コイルを有する環状のステータの径方向内側にマグネット及びシャフトを有するロータを配置したモータが広く知られている。このモータは、駆動時において、マグネットとコイルとを流れる磁束がロータの内部でループすることがある。これにより、マグネットの磁束を有効活用することができない虞がある。そこで、ロータとステータとの間において磁束を円滑に流すための構造が必要となる。　 Conventionally, a motor in which a rotor having a magnet and a shaft is arranged radially inside an annular stator having an exciting coil is widely known. When this motor is driven, the magnetic flux flowing between the magnet and the coil may loop inside the rotor. Thereby, there exists a possibility that the magnetic flux of a magnet cannot be used effectively. Therefore, a structure for smoothly flowing the magnetic flux between the rotor and the stator is required. *
例えば、特許文献１に記載された従来の電動パワーステアリング用電動機は、外周が円弧状のロータヨークと、ロータヨークに埋め込まれたマグネットと、中心軸に直交する仮想平面でのマグネットの短辺の両側にあって、ロータヨークを貫通する貫通孔で構成されるフラックスバリアと、を有する。この構成により、フラックスバリアを利用して磁束の通過を抑制、遮断することができる。したがって、ロータとステータとの間において磁束が円滑に流れることが期待できる。 For example, a conventional electric power steering motor described in Patent Document 1 includes a rotor yoke having an arcuate outer periphery, a magnet embedded in the rotor yoke, and both sides of the short side of the magnet in a virtual plane orthogonal to the central axis. And a flux barrier composed of a through hole penetrating the rotor yoke. With this configuration, the flux barrier can be used to suppress or block the passage of magnetic flux. Therefore, it can be expected that the magnetic flux smoothly flows between the rotor and the stator.
特開２０１３－０８１３１２号公報JP 2013-08112 A
しかしながら、特許文献１に記載された従来の電動パワーステアリング用電動機は、周方向に隣り合うフラックスバリアの間に存在する鋼板の領域において磁束の漏れが発生することが懸念される。当該電動パワーステアリング用電動機において、磁束の漏れが発生するとロータコア内部における磁束ループとなり、マグネットの磁束を有効活用することができないことが懸念された。　 However, the conventional electric power steering motor described in Patent Document 1 is concerned that magnetic flux leakage may occur in the region of the steel plate existing between the flux barriers adjacent in the circumferential direction. In the electric power steering motor, when magnetic flux leakage occurs, a magnetic flux loop is formed inside the rotor core, and there is a concern that the magnetic flux of the magnet cannot be used effectively. *
本発明は、上記の点に鑑みなされたものであり、マグネットの磁束をより有効活用することが可能なロータコア、ロータ、及びモータを提供することを目的とする。 The present invention has been made in view of the above points, and an object of the present invention is to provide a rotor core, a rotor, and a motor that can make more effective use of magnetic flux of a magnet.
本発明の例示的なロータコアは、中心軸に対して径方向に拡がる第１積層鋼板及び第２積層鋼板を有し、前記第１積層鋼板は、前記中心軸の径方向外側に位置する第１ベース部と、前記第１ベース部の径方向外側に貫通部を介して離隔して配置され、周方向に所定間隔で配置される複数の片状部と、を有し、前記第２積層鋼板は、前記中心軸の径方向外側に位置する第２ベース部と、前記第２ベース部の径方向外側に貫通部を介して離隔して配置され、周方向に延びる環状部と、を有し、前記環状部は、外径が異なる大径部及び小径部を有し、前記大径部と、前記小径部と、は周方向に交互に配置され、複数の前記第１積層鋼板と、少なくとも１枚の前記第２積層鋼板と、が軸方向に積層され、前記片状部は、軸方向に突出する第１カシメ部を有し、前記大径部は、前記片状部と軸方向に重なるとともに、軸方向の突出し前記第１カシメ部と軸方向に重なる第２カシメ部を有する。　 An exemplary rotor core according to the present invention includes a first laminated steel plate and a second laminated steel plate that extend in a radial direction with respect to a central axis, and the first laminated steel plate is a first one located radially outside the central axis. A second laminated steel sheet, comprising: a base portion; and a plurality of piece-like portions disposed at a predetermined interval in the circumferential direction and spaced apart from each other through a through portion on a radially outer side of the first base portion. Has a second base portion located on the radially outer side of the central axis, and an annular portion that is arranged on the radially outer side of the second base portion with a penetrating portion therebetween and extends in the circumferential direction. The annular portion has a large-diameter portion and a small-diameter portion having different outer diameters, the large-diameter portion and the small-diameter portion are alternately arranged in the circumferential direction, and a plurality of the first laminated steel plates, One piece of the second laminated steel sheet is laminated in the axial direction, and the piece-like part is a first caulking part protruding in the axial direction. A, the large diameter portion, with overlapping the piece-shaped portion and axially, a second caulking portion that overlaps in the axial direction of the projecting the first caulking portion and the axial direction. *
本発明の例示的なロータは、上記構成のロータコアと、前記ロータコアの前記貫通部に配置される複数のマグネットと、を有する。前記ロータコアは、周方向に隣り合う前記貫通部同士の間に各々配置される複数の空間部を有する。前記空間部は、前記ロータコアを軸方向に貫通する。前記貫通部は、前記第１ベース部及び前記片状部と、前記第２ベース部及び前記環状部と、によって構成される。　 An exemplary rotor of the present invention includes the rotor core configured as described above, and a plurality of magnets arranged in the penetrating portion of the rotor core. The rotor core has a plurality of space portions that are respectively disposed between the through portions adjacent to each other in the circumferential direction. The space portion penetrates the rotor core in the axial direction. The penetrating portion is constituted by the first base portion and the piece-like portion, and the second base portion and the annular portion. *
本発明の例示的なモータは、上記構成のロータを有する。 An exemplary motor of the present invention has the rotor configured as described above.
本発明の例示的なロータコア、ロータ、及びモータによれば、マグネットの磁束をより有効活用することが可能である。 According to the exemplary rotor core, rotor, and motor of the present invention, the magnetic flux of the magnet can be used more effectively.
図１は、本発明の第１実施形態に係るモータの平面図である。FIG. 1 is a plan view of a motor according to a first embodiment of the present invention. 図２は、本発明の第１実施形態に係るモータのロータコアを上から見た斜視図である。FIG. 2 is a perspective view of the rotor core of the motor according to the first embodiment of the present invention as seen from above. 図３は、本発明の第１実施形態に係るモータのロータコアを下から見た斜視図である。FIG. 3 is a perspective view of the rotor core of the motor according to the first embodiment of the present invention as seen from below. 図４は、本発明の第１実施形態に係るロータコアの第１積層鋼板の平面図である。FIG. 4 is a plan view of the first laminated steel sheet of the rotor core according to the first embodiment of the present invention. 図５は、本発明の第１実施形態に係るロータコアの第２積層鋼板の平面図である。FIG. 5 is a plan view of the second laminated steel plate of the rotor core according to the first embodiment of the present invention. 図６は、本発明の第２実施形態に係るモータのロータコアを上から見た斜視図である。FIG. 6 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from above. 図７は、本発明の第２実施形態に係るモータのロータコアを下から見た斜視図である。FIG. 7 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from below. 図８は、本発明の第２実施形態に係るロータコアの連結積層鋼板の平面図である。FIG. 8 is a plan view of a connected laminated steel sheet of rotor cores according to the second embodiment of the present invention. 図９は、本発明の第３実施形態に係るロータコアの連結積層鋼板の部分拡大平面図である。FIG. 9 is a partially enlarged plan view of a connected laminated steel sheet of rotor cores according to a third embodiment of the present invention. 図１０は、本発明の第３実施形態に係るロータコアの製造方法で用いる切断装置の一例を示す斜視図である。FIG. 10 is a perspective view showing an example of a cutting device used in the method for manufacturing a rotor core according to the third embodiment of the present invention. 図１１は、本発明の第３実施形態に係るロータコアの製造方法で用いる切断工具の一例を示す部分拡大平面図である。FIG. 11 is a partially enlarged plan view showing an example of a cutting tool used in the rotor core manufacturing method according to the third embodiment of the present invention. 図１２は、本発明の第３実施形態に係るロータコアの製造方法の切断工程の第１例を示す連結積層鋼板の部分拡大平面図である。FIG. 12 is a partially enlarged plan view of a connected laminated steel sheet showing a first example of a cutting step of the method for manufacturing a rotor core according to the third embodiment of the present invention. 図１３は、本発明の第３実施形態に係るロータコアの製造方法の切断工程の第２例を示す連結積層鋼板の平面図である。FIG. 13: is a top view of the connection laminated steel plate which shows the 2nd example of the cutting process of the manufacturing method of the rotor core which concerns on 3rd Embodiment of this invention. 図１４は、本発明の第３実施形態に係るロータコアの製造方法の切断工程の第３例を示す連結積層鋼板の平面図である。FIG. 14: is a top view of the connection laminated steel plate which shows the 3rd example of the cutting process of the manufacturing method of the rotor core which concerns on 3rd Embodiment of this invention. 図１５は、本発明の第４実施形態に係るモータのロータコアを上から見た斜視図である。FIG. 15: is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the top. 図１６は、本発明の第４実施形態に係るモータのロータコアを下から見た斜視図である。FIG. 16: is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the bottom. 図１７は、本発明の第４実施形態に係るロータコアの連結積層鋼板の平面図である。FIG. 17 is a plan view of a laminated laminated steel sheet of rotor cores according to a fourth embodiment of the present invention. 図１８は、本発明の第５実施形態に係るモータのロータコアを上から見た斜視図である。FIG. 18 is a perspective view of a rotor core of a motor according to a fifth embodiment of the present invention as viewed from above. 図１９は、本発明の第５実施形態に係るモータのロータコアを下から見た斜視図である。FIG. 19 is a perspective view of a rotor core of a motor according to the fifth embodiment of the present invention as seen from below. 図２０は、本発明の第５実施形態に係るロータコアの連結積層鋼板の平面図である。FIG. 20 is a plan view of a laminated laminated steel sheet for rotor cores according to a fifth embodiment of the present invention. 図２１は、本発明の第５実施形態に係るロータコアの第１変形例を上から見た斜視図である。FIG. 21 is a perspective view of a first modification of the rotor core according to the fifth embodiment of the present invention as seen from above. 図２２は、本発明の第５実施形態に係るロータコアの第１変形例を下から見た斜視図である。FIG. 22 is a perspective view of a first modification of the rotor core according to the fifth embodiment of the present invention viewed from below. 図２３は、本発明の第５実施形態に係るロータコアの第２変形例の製造方法の第１段階を示す縦端面図である。FIG. 23 is a longitudinal end view showing a first step in a method for manufacturing a second modification of the rotor core according to the fifth embodiment of the present invention. 図２４は、本発明の第５実施形態に係るロータコアの第２変形例の製造方法の第２段階を示す縦端面図である。FIG. 24 is a longitudinal end view showing a second step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention. 図２５は、本発明の第５実施形態に係るロータコアの第２変形例の製造方法の第３段階を示す縦端面図である。FIG. 25 is a longitudinal end view showing a third step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention. 図２６は、本発明の第６実施形態に係るモータのロータコアを上から見た斜視図である。FIG. 26 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from above. 図２７は、本発明の第６実施形態に係るモータのロータコアを下から見た斜視図である。FIG. 27 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from below. 図２８は、本発明の第６実施形態に係るロータコアの第１積層鋼板の平面図である。FIG. 28 is a plan view of the first laminated steel sheet of the rotor core according to the sixth embodiment of the present invention. 図２９は、本発明の第６実施形態に係るロータコアの第２積層鋼板の平面図である。FIG. 29 is a plan view of a second laminated steel plate of the rotor core according to the sixth embodiment of the present invention. 図３０は、本発明の第７実施形態に係るモータのロータを上から見た斜視図である。FIG. 30 is a top perspective view of the rotor of the motor according to the seventh embodiment of the present invention. 図３１は、本発明の第７実施形態に係るモータのロータの平面図である。FIG. 31 is a plan view of a rotor of a motor according to a seventh embodiment of the present invention. 図３２は、本発明の変形例に係る第１積層鋼板の平面図である。FIG. 32 is a plan view of a first laminated steel sheet according to a modification of the present invention. 図３３は、本発明の変形例に係る第１積層鋼板の第１カシメ部の断面図である。FIG. 33 is a cross-sectional view of the first caulking portion of the first laminated steel sheet according to the modified example of the present invention. 図３４は、本発明の変形例に係る第２積層鋼板の平面図である。FIG. 34 is a plan view of a second laminated steel sheet according to a modification of the present invention. 図３５は、本発明の変形例に係る第２積層鋼板の第２カシメ部の断面図である。FIG. 35 is a cross-sectional view of the second caulking portion of the second laminated steel sheet according to the modification of the present invention. 図３６は、本発明の変形例に係る連結積層鋼板の平面図である。FIG. 36 is a plan view of a connected laminated steel sheet according to a modification of the present invention. 図３７は、本発明の変形例に係る連結積層鋼板の連結カシメ部の断面図である。FIG. 37 is a cross-sectional view of a connection crimping portion of a connection laminated steel sheet according to a modification of the present invention. 図３８は、本発明の変形例に係るモータのロータの断面図である。FIG. 38 is a cross-sectional view of a rotor of a motor according to a modification example of the present invention. 図３９は、本発明の変形例に係るモータのロータの断面の部分拡大図である。FIG. 39 is a partially enlarged view of a cross section of a rotor of a motor according to a modification of the present invention.
以下、本発明の例示的な実施形態について、図面を参照しながら詳細に説明する。本明細書では、モータの回転軸が延びる方向を単に「軸方向」と呼び、モータの回転軸を中心として回転軸と直交する方向を単に「径方向」と呼び、モータの回転軸を中心とする円弧に沿う方向を単に「周方向」と呼ぶ。ロータコアの中心軸は、モータの回転軸に一致する。また、本書では、説明の便宜上、軸方向を上下方向とし、図１の紙面奥行き方向をロータコア、ロータ、モータの上下方向として各部の形状や位置関係を説明する。なお、この上下方向の定義がモータの使用時の向きを限定するものではない。また、本明細書では、軸方向に平行な端面図を「縦端面図」と呼ぶ。また、本明細書で用いる「平行」、「垂直」は、厳密な意味で平行、垂直を表すものではなく、略平行、略垂直を含む。　 Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In this specification, the direction in which the rotation axis of the motor extends is simply referred to as “axial direction”, the direction perpendicular to the rotation axis centered on the rotation axis of the motor is simply referred to as “radial direction”, and the rotation axis of the motor is the center. The direction along the circular arc is simply called “circumferential direction”. The central axis of the rotor core coincides with the rotation axis of the motor. Further, in this document, for convenience of explanation, the shape and positional relationship of each part will be described with the axial direction as the vertical direction and the depth direction in FIG. 1 as the vertical direction of the rotor core, rotor, and motor. Note that the definition of the vertical direction does not limit the direction when the motor is used. Further, in the present specification, an end view parallel to the axial direction is referred to as a “vertical end view”. Further, “parallel” and “vertical” used in this specification do not represent parallel or vertical in a strict sense, but include substantially parallel and substantially vertical. *
＜１．第１実施形態＞

＜１－１．モータの全体構成＞

本発明の例示的な第１実施形態に係るモータの全体構成について説明する。図１は、本発明の実施形態に係るモータの平面図である。図１に示すモータ１は、ステータ２と、ロータ３と、を有する。　 <1. First Embodiment>

<1-1. Overall configuration of motor>

The overall configuration of the motor according to the first exemplary embodiment of the present invention will be described. FIG. 1 is a plan view of a motor according to an embodiment of the present invention. A motor 1 shown in FIG. 1 has a stator 2 and a rotor 3.
ステータ２は、例えば、軸方向に延びる円筒形状である。ステータ２は、ロータ３の径方向外側に所定の隙間を設けて配置される。ステータ２は、ステータコア２１と、インシュレータ２２と、コイル２３と、を有する。　 The stator 2 has, for example, a cylindrical shape that extends in the axial direction. The stator 2 is arranged with a predetermined gap on the radially outer side of the rotor 3. The stator 2 includes a stator core 21, an insulator 22, and a coil 23. *
ステータコア２１は、軸方向に延びる筒形状である。ステータコア２１は、複数枚の磁性鋼板を軸方向に積層して形成される。ステータコア２１は、コアバック２１ａと、ティース（図示略）と、を有する。コアバック２１ａは、円環形状である。ティースは、コアバック２１ａの内周面から径方向内側に延びる。ティースは、複数が周方向に所定間隔で並べて設けられる。　 The stator core 21 has a cylindrical shape extending in the axial direction. The stator core 21 is formed by laminating a plurality of magnetic steel plates in the axial direction. The stator core 21 has a core back 21a and teeth (not shown). The core back 21a has an annular shape. The teeth extend radially inward from the inner peripheral surface of the core back 21a. A plurality of teeth are provided side by side at a predetermined interval in the circumferential direction. *
インシュレータ２２は、ティースの外面を囲んで設けられる。インシュレータ２２は、ステータコア２１とコイル２３との間に配置される。インシュレータ２２は、例えば、合成樹脂の電気絶縁部材で構成される。コイル２３は、例えば、インシュレータ２２の外周に導線が巻き回されて形成される。　 The insulator 22 is provided so as to surround the outer surface of the teeth. The insulator 22 is disposed between the stator core 21 and the coil 23. The insulator 22 is made of, for example, an electrically insulating member made of synthetic resin. The coil 23 is formed, for example, by winding a conductive wire around the outer periphery of the insulator 22. *
ロータ３は、軸方向に延びる円筒形状である。ロータ３は、ステータ２の径方向内側に所定の隙間を設けて配置される。ロータ３は、シャフト３１と、ロータコア４０と、マグネット３２と、空間部３３若しくは、樹脂部３４と、を有する。空間部３３は、柱部３３ａと、外周部３３ｂと、を有する。　 The rotor 3 has a cylindrical shape extending in the axial direction. The rotor 3 is arranged with a predetermined gap on the radially inner side of the stator 2. The rotor 3 includes a shaft 31, a rotor core 40, a magnet 32, and a space portion 33 or a resin portion 34. The space portion 33 includes a column portion 33a and an outer peripheral portion 33b. *
シャフト３１は、モータ１の回転軸である。シャフト３１は、上下方向に延びる円柱形状である。シャフト３１は、ロータ３の上方及び下方に設けられた上軸受及び下軸受（ともに図示略）に挿入されて回転可能に支持される。ロータ３は、上下方向に延びるシャフト３１を中心に回転する。　 The shaft 31 is a rotating shaft of the motor 1. The shaft 31 has a columnar shape extending in the vertical direction. The shaft 31 is inserted into an upper bearing and a lower bearing (both not shown) provided above and below the rotor 3 and is rotatably supported. The rotor 3 rotates around a shaft 31 extending in the vertical direction. *
ロータコア４０は、軸方向に延びる円筒形状である。ロータコア４０の径方向中心部に位置する孔部４１ｄ、４２ｄに、シャフト３１が挿入される。ロータコア４０の中心軸は、モータ１のシャフト３１に一致する。ロータコア４０は、例えば複数枚の磁性鋼板を軸方向に積層して構成される。ロータコア４０については、その詳細を後述する。　 The rotor core 40 has a cylindrical shape extending in the axial direction. The shaft 31 is inserted into the holes 41 d and 42 d located at the radial center of the rotor core 40. The central axis of the rotor core 40 coincides with the shaft 31 of the motor 1. The rotor core 40 is configured by, for example, laminating a plurality of magnetic steel plates in the axial direction. Details of the rotor core 40 will be described later. *
マグネット３２は、ロータコア４０の外縁部の径方向内側に配置される。マグネット３２は、複数が周方向に所定の間隔で並べて配置される。マグネット３２は、例えば８個設けられる。マグネット３２は、底面が略矩形状で、軸方向に延びる直方体である。マグネット３２の軸方向長さは、ロータコア４０の軸方向長さに概ね一致する。マグネット３２は、ロータコア４０によって支持される。　 The magnet 32 is disposed on the radially inner side of the outer edge portion of the rotor core 40. A plurality of magnets 32 are arranged side by side at a predetermined interval in the circumferential direction. For example, eight magnets 32 are provided. The magnet 32 is a rectangular parallelepiped having a substantially rectangular bottom surface and extending in the axial direction. The axial length of the magnet 32 substantially matches the axial length of the rotor core 40. The magnet 32 is supported by the rotor core 40. *
柱部３３ａは、周方向に隣り合うマグネット３２同士の間に設けられる。例えば、マグネット３２が８個である場合、柱部３３ａは、８箇所に設けられる。柱部３３ａは、底面が略台形形状で、軸方向に延びる四角柱形状の空間である。柱部３３ａは、ロータコア４０を軸方向に貫通する。柱部３３ａを設けることで、ロータ３において、マグネット３２の磁束をより有効活用することが可能である。　 The column part 33a is provided between the magnets 32 adjacent to each other in the circumferential direction. For example, when the number of the magnets 32 is 8, the column part 33a is provided in 8 places. The column portion 33a is a rectangular column-shaped space having a substantially trapezoidal bottom surface and extending in the axial direction. The column part 33a penetrates the rotor core 40 in the axial direction. By providing the column portion 33a, the magnetic flux of the magnet 32 can be utilized more effectively in the rotor 3. *
外周部３３ｂは、柱部３３ａの径方向外側に設けられる。外周部３３ｂは、８箇所に設けられる。外周部３３ｂは、底面が略半円形状で、軸方向に延びる空間である。　 The outer peripheral part 33b is provided in the radial direction outer side of the pillar part 33a. The outer peripheral part 33b is provided in eight places. The outer peripheral portion 33b is a space having a substantially semicircular bottom surface and extending in the axial direction. *
樹脂部３４は、空間部３３に設けられる。ロータ３の外縁部において、樹脂部３４は、ロータコア４０の外側面と、ロータコア４０の径方向外側に配置される金型（図示略）の内周面と、で囲まれた空間部３３に合成樹脂、接着剤等を流し込んで設けられる。これにより、樹脂部３４がフラックスバリアとしての役割を果たす。　 The resin part 34 is provided in the space part 33. At the outer edge portion of the rotor 3, the resin portion 34 is synthesized in a space portion 33 surrounded by the outer surface of the rotor core 40 and the inner peripheral surface of a mold (not shown) arranged on the radially outer side of the rotor core 40. It is provided by pouring resin, adhesive, or the like. Thereby, the resin part 34 plays a role as a flux barrier. *
＜１－２．ロータコアの詳細な構成＞

続いて、ロータコア４０の詳細な構成について説明する。図２は、本発明の第１実施形態に係るモータ１のロータコアを上から見た斜視図である。図３は、本発明の第１実施形態に係るモータ１のロータコアを下から見た斜視図である。図４は、本発明の第１実施形態に係るロータコアの第１積層鋼板の平面図である。図５は、本発明の第１実施形態に係るロータコアの第２積層鋼板の平面図である。　 <1-2. Detailed configuration of rotor core>

Subsequently, a detailed configuration of the rotor core 40 will be described. FIG. 2 is a perspective view of the rotor core of the motor 1 according to the first embodiment of the present invention as viewed from above. FIG. 3 is a perspective view of the rotor core of the motor 1 according to the first embodiment of the present invention as viewed from below. FIG. 4 is a plan view of the first laminated steel sheet of the rotor core according to the first embodiment of the present invention. FIG. 5 is a plan view of the second laminated steel plate of the rotor core according to the first embodiment of the present invention.
図２及び図３に示すロータコア４０は、第１積層鋼板４１と、第２積層鋼板４２と、を有する。第１積層鋼板４１及び第２積層鋼板４２は各々、ロータコア４０の中心軸に対して径方向に拡がる。　 The rotor core 40 shown in FIGS. 2 and 3 includes a first laminated steel plate 41 and a second laminated steel plate 42. The first laminated steel plate 41 and the second laminated steel plate 42 each expand in the radial direction with respect to the central axis of the rotor core 40. *
＜１－２－１．第１積層鋼板の構成＞

図４に示す第１積層鋼板４１は、第１ベース部４１ａと、貫通部４１ｂと、片状部４１ｃと、を有する。　 <1-2-1. Configuration of first laminated steel plate>

The 1st laminated steel plate 41 shown in FIG. 4 has the 1st base part 41a, the penetration part 41b, and the piece-like part 41c.
第１ベース部４１ａは、中心軸の径方向外側に位置する。第１ベース部４１ａは、外形が略八角形状である。第１ベース部４１ａは、その径方向中心部に、シャフト３１が軸方向に貫通する孔部４１ｄを有する。　 The first base portion 41a is located on the radially outer side of the central axis. The first base portion 41a has a substantially octagonal outer shape. The first base portion 41a has a hole portion 41d through which the shaft 31 penetrates in the axial direction at the center portion in the radial direction. *
貫通部４１ｂは、第１ベース部４１ａの外縁部４１ｗの８箇所の辺各々の径方向外側に設けられる。貫通部４１ｂは、第１ベース部４１ａと、片状部４１ｃと、の間の隙間として構成される。８箇所の貫通部４１ｂ各々に、１個ずつマグネット３２が設けられる（図１参照）。　 The penetration part 41b is provided on the radially outer side of each of the eight sides of the outer edge part 41w of the first base part 41a. The penetration part 41b is configured as a gap between the first base part 41a and the piece-like part 41c. One magnet 32 is provided for each of the eight through portions 41b (see FIG. 1). *
片状部４１ｃは、第１ベース部４１ａの径方向外側に、貫通部４１ｂを介して離隔して配置される。片状部４１ｃは、複数が周方向に所定間隔で配置される。片状部４１ｃは、第１ベース部４１ａの外周の８箇所の辺各々の径方向外側に、例えば８個設けられる。片状部４１ｃは、その平面視形状が、中心がシャフト３１の軸線よりも径方向外側にずれて、ロータ３の半径よりも小さい半径の円弧と、この円弧の径方向内側に位置する弦に相当する直線部と、を有する略半円形状で構成される。片状部４１ｃの径方向内側の直線部は、第１ベース部４１ａの外縁部４１ｗと略平行である。　 The piece-like portion 41c is arranged on the outer side in the radial direction of the first base portion 41a so as to be separated via the through portion 41b. A plurality of the piece-like portions 41c are arranged at a predetermined interval in the circumferential direction. For example, eight piece-like portions 41c are provided on the radially outer side of each of the eight sides on the outer periphery of the first base portion 41a. The piece-like portion 41 c has a shape in plan view that is centered on the outer side in the radial direction than the axis of the shaft 31 and has a radius smaller than the radius of the rotor 3 and a chord located on the inner side in the radial direction of the arc. And a substantially semicircular shape having a corresponding straight line portion. The straight portion on the radially inner side of the piece-like portion 41c is substantially parallel to the outer edge portion 41w of the first base portion 41a. *
第１ベース部４１ａは、凸部４１ｅを有する。凸部４１ｅは、中心軸に対する、周方向に隣り合う片状部４１ｃ同士の間の角度領域において設けられる。すなわち、凸部４１ｅは、周方向に隣り合う片状部４１ｃ各々の、周方向に対向する端部各々と、中心軸と、で囲まれた扇形状の領域に設けられる。言い換えれば、凸部４１ｅは、ロータ３の柱部３３ａに設けられる。中心軸に対する、周方向に隣り合う片状部４１ｃ同士の間の、扇形状の角度領域の一例を、図４に一点鎖線で描画した。　 The first base portion 41a has a convex portion 41e. The convex portion 41e is provided in an angular region between the piece portions 41c adjacent to each other in the circumferential direction with respect to the central axis. That is, the convex portion 41e is provided in a fan-shaped region surrounded by each of the end portions facing each other in the circumferential direction and the central axis of each piece-like portion 41c adjacent in the circumferential direction. In other words, the convex portion 41 e is provided on the column portion 33 a of the rotor 3. An example of a fan-shaped angle region between the piece-like portions 41c adjacent to each other in the circumferential direction with respect to the central axis is drawn with a one-dot chain line in FIG. *
凸部４１ｅは、第１ベース部４１ａの外縁部４１ｗから径方向外側に向かって突出する。第１ベース部４１ａが多角形である場合、凸部４１ｅは、第１ベース部４１ａの頂点各々から径方向外側に向かって突出する。凸部４１ｅの突出長さは、貫通部４１ｂの径方向の幅よりも短い。第１ベース部４１ａが凸部４１ｅを有することで、第１ベース部４１ａと片状部４１ｃとの間、すなわち貫通部４１ｂにマグネット３２を挿入した場合に、凸部４１ｅにマグネット３２の周方向端部を接触させることができる。これにより、マグネット３２の周方向における位置決めを行うことができる。　 The convex portion 41e protrudes radially outward from the outer edge portion 41w of the first base portion 41a. When the 1st base part 41a is a polygon, convex part 41e protrudes toward the diameter direction outside from each vertex of the 1st base part 41a. The protruding length of the convex portion 41e is shorter than the radial width of the penetrating portion 41b. Since the first base portion 41a has the convex portion 41e, when the magnet 32 is inserted between the first base portion 41a and the piece-like portion 41c, that is, in the through portion 41b, the circumferential direction of the magnet 32 on the convex portion 41e. The ends can be contacted. Thereby, the positioning of the magnet 32 in the circumferential direction can be performed. *
＜１－２－２．第２積層鋼板の構成＞

図５に示す第２積層鋼板４２は、第２ベース部４２ａと、貫通部４２ｂと、環状部４２ｃと、を有する。　 <1-2-2. Configuration of second laminated steel plate>

The second laminated steel plate 42 shown in FIG. 5 has a second base portion 42a, a through portion 42b, and an annular portion 42c.
第２ベース部４２ａは、中心軸の径方向外側に位置する。第２ベース部４２ａは、外形が略八角形状である。第２ベース部４２ａの外形は、第１ベース部４１ａの外形と略同じである。第２ベース部４２ａは、その径方向中心部に、シャフト３１が軸方向に貫通する孔部４２ｄを有する。　 The second base portion 42a is located on the radially outer side of the central axis. The second base portion 42a has a substantially octagonal outer shape. The outer shape of the second base portion 42a is substantially the same as the outer shape of the first base portion 41a. The second base portion 42a has a hole portion 42d through which the shaft 31 penetrates in the axial direction at the center portion in the radial direction. *
貫通部４２ｂは、第２ベース部４２ａの外周の８箇所の辺各々の径方向外側に設けられる。貫通部４２ｂは、第２ベース部４２ａと、後述する環状部４２ｃの大径部４２ｆと、の間の隙間として構成される。８箇所の貫通部４２ｂ各々に、１個ずつマグネット３２が設けられる（図１参照）。　 The through portion 42b is provided on the radially outer side of each of the eight sides on the outer periphery of the second base portion 42a. The through portion 42b is configured as a gap between the second base portion 42a and a large diameter portion 42f of an annular portion 42c described later. One magnet 32 is provided for each of the eight through portions 42b (see FIG. 1). *
環状部４２ｃは、第２ベース部４２ａの径方向外側に、貫通部４２ｂを介して離隔して配置される。環状部４２ｃは、周方向に延びる。環状部４２ｃは、第１積層鋼板４１の８個の片状部４１ｃを環状に繋げた形状と同様の形状である。　 The annular portion 42c is arranged on the outer side in the radial direction of the second base portion 42a via the through portion 42b. The annular portion 42c extends in the circumferential direction. The annular portion 42c has the same shape as the shape in which the eight piece-like portions 41c of the first laminated steel plate 41 are connected in an annular shape. *
環状部４２ｃは、外径が異なる大径部４２ｆ及び小径部４２ｇを有する。環状部４２ｃは、大径部４２ｆと、小径部４２ｇと、が周方向に交互に配置される。この構成によれば、小径部４２ｇにおいて磁気飽和し易くなる。したがって、磁束を効率良く導くことができ、ロータコア４０の内部における磁束ループの発生を抑制することが可能である。　 The annular portion 42c has a large diameter portion 42f and a small diameter portion 42g having different outer diameters. In the annular part 42c, the large diameter part 42f and the small diameter part 42g are alternately arranged in the circumferential direction. According to this configuration, magnetic saturation is likely to occur in the small diameter portion 42g. Therefore, the magnetic flux can be efficiently guided, and the occurrence of a magnetic flux loop inside the rotor core 40 can be suppressed. *
大径部４２ｆは、軸方向において、第１積層鋼板４１の片状部４１と同じ位置に配置される。大径部４２ｆは、その平面視形状が、片状部４１ｃと同様の略欠円形状である。大径部４２ｆは、第２ベース部４２ａの外周の８箇所の辺各々の径方向外側に、片状部４１ｃと同じく８箇所に設けられる。大径部４２ｆの径方向内側の直線部は、第２ベース部４２ａの外周の辺と略平行である。大径部４２ｆの外径は、小径部４２ｇの外径よりも大きい。　 The large diameter portion 42f is disposed at the same position as the piece portion 41 of the first laminated steel plate 41 in the axial direction. The large-diameter portion 42f has a substantially oval shape in plan view, similar to the piece-like portion 41c. The large-diameter portion 42f is provided at eight locations on the radially outer side of each of the eight sides on the outer periphery of the second base portion 42a, similarly to the piece-like portion 41c. The linear portion on the radially inner side of the large diameter portion 42f is substantially parallel to the outer peripheral side of the second base portion 42a. The outer diameter of the large diameter part 42f is larger than the outer diameter of the small diameter part 42g. *
小径部４２ｇは、軸方向において、第１積層鋼板４１の、周方向に隣り合う片状部４１同士の間の領域と同じ位置に配置される。小径部４２ｇは、その平面視形状が、周方向に隣り合う大径部４２ｆを繋ぐ長板形状である。小径部４２ｇは、２箇所の大径部４２ｆの端部同士を繋ぐ。小径部４２ｇの外径は、大径部４２ｆの外径よりも小さい。　 The small diameter part 42g is arrange | positioned in the same position as the area | region between the piece parts 41 adjacent to the circumferential direction of the 1st laminated steel plate 41 in an axial direction. The small-diameter portion 42g has a long plate shape in plan view that connects the large-diameter portions 42f adjacent in the circumferential direction. The small diameter portion 42g connects the ends of the two large diameter portions 42f. The outer diameter of the small diameter part 42g is smaller than the outer diameter of the large diameter part 42f. *
小径部４２ｇは、突起部４２ｈを有する。突起部４２ｈは、小径部４２ｇの内周面から径方向内側に向かって延びる。この構成によれば、環状部４２ｃの強度を向上させることができる。また、第２ベース部４２ａと環状部４２ｃとの間、すなわち貫通部４２ｂにマグネット３２を挿入した場合に、突起部４２ｈに、マグネット３２の周方向端部を接触させることができる。これにより、マグネット３２の周方向における位置決めを行うことが可能である。なお、突起部４２ｈの径方向の長さは、貫通部４２ｂの径方向の幅よりも短い。　 The small diameter portion 42g has a protruding portion 42h. The protrusion 42h extends radially inward from the inner peripheral surface of the small diameter portion 42g. According to this configuration, the strength of the annular portion 42c can be improved. Further, when the magnet 32 is inserted between the second base portion 42a and the annular portion 42c, that is, in the through portion 42b, the circumferential end portion of the magnet 32 can be brought into contact with the protruding portion 42h. Thereby, it is possible to position the magnet 32 in the circumferential direction. Note that the radial length of the protrusion 42h is shorter than the radial width of the through portion 42b. *
突起部４２ｈは、例えば、一箇所の小径部４２ｇに対して二つが設けられる。一箇所の小径部４２ｇに設けられた二つの突起部４２ｈは、周方向に離隔させて並べられる。この構成によれば、二つの突起部４２ｈの間の領域を広くフラックスバリアとして利用することができる。したがって、マグネットの磁束をより有効活用することが可能である。なお、突起部４２ｈは二つに限らず、一つであっても三つ以上であっても良い。　 For example, two protrusions 42h are provided for one small diameter portion 42g. The two protrusions 42h provided on the small-diameter portion 42g at one location are arranged apart from each other in the circumferential direction. According to this configuration, the region between the two protrusions 42h can be widely used as a flux barrier. Therefore, the magnetic flux of the magnet can be used more effectively. Note that the number of protrusions 42h is not limited to two, and may be one or three or more. *
第２ベース部４２ａは、凸部４２ｅを有する。凸部４２ｅは、中心軸に対する、小径部４２ｇが位置する角度領域において設けられる。第２ベース部４２ａが多角形である場合、凸部４２ｅは、第２ベース部４２ａの頂点各々から径方向外側に向かって突出する。すなわち、凸部４２ｅは、小径部４２ｇの周方向の両端部と、中心軸と、で囲まれた扇形状の領域に設けられる。言い換えれば、凸部４２ｅは、ロータ３の柱部３３ａに設けられる。中心軸に対する、小径部４２ｇが位置する扇形状の角度領域の一例を、図５に一点鎖線で描画した。　 The second base portion 42a has a convex portion 42e. The convex portion 42e is provided in an angle region where the small diameter portion 42g is located with respect to the central axis. When the 2nd base part 42a is a polygon, the convex part 42e protrudes toward the radial direction outer side from each vertex of the 2nd base part 42a. That is, the convex portion 42e is provided in a fan-shaped region surrounded by both end portions in the circumferential direction of the small diameter portion 42g and the central axis. In other words, the convex portion 42 e is provided on the column portion 33 a of the rotor 3. An example of a fan-shaped angle region where the small-diameter portion 42g is located with respect to the central axis is drawn with a one-dot chain line in FIG. *
なお、前述のように、小径部４２ｇは、軸方向において、第１積層鋼板４１の、周方向に隣り合う片状部４１ｃ同士の間の領域と同じ位置に配置される。したがって、ロータコア４０に関して言えば、凸部４２ｅは、中心軸に対する、周方向に隣り合う片状部４１ｃ同士の間の角度領域において設けられる。　 As described above, the small-diameter portion 42g is disposed at the same position as the region between the piece-like portions 41c adjacent to each other in the circumferential direction of the first laminated steel plate 41 in the axial direction. Therefore, regarding the rotor core 40, the convex part 42e is provided in the angle area | region between the piece parts 41c adjacent to the circumferential direction with respect to a central axis. *
凸部４２ｅは、第２ベース部４２ａの外縁部４２ｗから径方向外側に向かって突出する。凸部４２ｅの先端部は、小径部４２ｇの径方向内側と対向する。凸部４２ｅは、周方向に関して、二つの突起部４２ｈの間の領域に配置される。凸部４２ｅの突出長さは、貫通部４２ｂの径方向の幅よりも短い。また、凸部４２ｅは、二つの突起部４２ｈに接触しない。第２ベース部４２ａが凸部４２ｅを有することで、第２ベース部４２ａと環状部４２ｃとの間、すなわち貫通部４２ｂにマグネット３２を挿入した場合に、凸部４２ｅにマグネット３２の周方向端部を接触させることができる。これにより、マグネット３２の周方向における位置決めを行うことができる。　 The convex part 42e protrudes radially outward from the outer edge part 42w of the second base part 42a. The tip of the convex portion 42e faces the radially inner side of the small diameter portion 42g. The convex part 42e is arrange | positioned in the area | region between the two protrusion parts 42h regarding the circumferential direction. The protruding length of the convex part 42e is shorter than the radial width of the through part 42b. Moreover, the convex part 42e does not contact the two projection parts 42h. Since the second base part 42a has the convex part 42e, when the magnet 32 is inserted between the second base part 42a and the annular part 42c, that is, the through part 42b, the circumferential end of the magnet 32 is provided on the convex part 42e. The parts can be brought into contact. Thereby, the positioning of the magnet 32 in the circumferential direction can be performed. *
＜１－２－３．ロータコアの積層構成＞

図２及び図３に示すロータコア４０は、上記構成の複数の第１積層鋼板４１と、上記構成の少なくとも１枚の第２積層鋼板４２と、が軸方向に積層されて構成される。このとき、第１積層鋼板４１の片状部４１ｃと、第２積層鋼板４２の環状部４２ｃの大径部４２ｆと、が軸方向において重なり、外周縁の一部が揃う位置で、第１積層鋼板４１と第２積層鋼板４２とが積層される。第１積層鋼板４１及び第２積層鋼板４２は、例えば、かしめなどによって固定される。　 <1-2-3. Laminated structure of rotor core>

The rotor core 40 shown in FIGS. 2 and 3 is configured by laminating a plurality of first laminated steel plates 41 having the above configuration and at least one second laminated steel plate 42 having the above configuration in the axial direction. At this time, at the position where the piece-like portion 41c of the first laminated steel plate 41 and the large-diameter portion 42f of the annular portion 42c of the second laminated steel plate 42 overlap in the axial direction and a part of the outer peripheral edge is aligned, The steel plate 41 and the second laminated steel plate 42 are laminated. The first laminated steel plate 41 and the second laminated steel plate 42 are fixed by caulking, for example.
この構成によれば、第１積層鋼板４１の第１ベース部４１ａと片状部４１ｃとの間、及び第２積層鋼板４２の第２ベース部４２ａと環状部４２ｃとの間の、周方向の全域にわたって、鋼板の領域が存在しない。これにより、第１ベース部４１ａと片状部４１ｃとの間、及び第２ベース部４２ａと環状部４２ｃとの間に、空気層等のフラックスバリアを設けることができる。したがって、マグネット３２の磁束をより有効活用することが可能である。　 According to this configuration, the circumferential direction between the first base portion 41a and the piece-like portion 41c of the first laminated steel plate 41 and between the second base portion 42a and the annular portion 42c of the second laminated steel plate 42 is provided. There is no area of the steel plate over the entire area. Thereby, flux barriers, such as an air layer, can be provided between the 1st base part 41a and piece-like part 41c, and between the 2nd base part 42a and annular part 42c. Therefore, the magnetic flux of the magnet 32 can be used more effectively. *
また、第２積層鋼板４２の枚数が第１積層鋼板４１の枚数よりも少ないので、ロータコア４０のすべてを第２積層鋼板４２で構成した場合と比較して、ロータコア４０全体における環状部４２ｃを流れる磁束の量を抑制することができる。したがって、環状部４２ｃにおけるマグネット３２の磁束をより有効活用することが可能である。　 In addition, since the number of the second laminated steel plates 42 is smaller than the number of the first laminated steel plates 41, it flows through the annular portion 42 c in the entire rotor core 40 as compared with the case where all of the rotor cores 40 are configured by the second laminated steel plates 42. The amount of magnetic flux can be suppressed. Therefore, the magnetic flux of the magnet 32 in the annular portion 42c can be used more effectively. *
第１積層鋼板４１及び第２積層鋼板４２の積層構成に関して、より詳しく言えば、ロータコア４０は、軸方向の上端及び下端の各々に例えば２枚の第２積層鋼板４２が配置され、軸方向上端の第２積層鋼板４２と、軸方向下端の第２積層鋼板４２と、の間に複数の第１積層鋼板４１が配置される。この構成によれば、ロータコア４０の強度の向上を図ることができる。さらに、軸方向に積層される複数の第１積層鋼板４１の中間部にも、例えば２枚の第２積層鋼板４２が配置される。この構成によれば、ロータコア４０の強度をより一層向上させることが可能である。　 More specifically, regarding the laminated configuration of the first laminated steel plate 41 and the second laminated steel plate 42, the rotor core 40 has, for example, two second laminated steel plates 42 arranged at each of the upper end and the lower end in the axial direction, and the upper end in the axial direction. A plurality of first laminated steel plates 41 are arranged between the second laminated steel plate 42 and the second laminated steel plate 42 at the lower end in the axial direction. According to this configuration, the strength of the rotor core 40 can be improved. Furthermore, for example, two second laminated steel plates 42 are also arranged in the middle part of the plurality of first laminated steel plates 41 laminated in the axial direction. According to this configuration, the strength of the rotor core 40 can be further improved. *
＜１－２－４．ロータコア及びロータの変形例＞

ロータコア４０は、軸方向の上端及び下端の各々に第１積層鋼板４１を配置し、軸方向上端の第１積層鋼板４１と、軸方向下端の第１積層鋼板４１と、の間に複数の第２積層鋼板４２を配置した構成であっても良い。このロータコア４０は、軸方向の上端及び下端の各々が第１積層鋼板４１である。ロータコア４０は、上から順に、複数の第１積層鋼板４１、１枚または２枚の第２積層鋼板４２、複数の第１積層鋼板４１、という構造であっても良い。また、ロータコア４０は、上から順に、複数の第１積層鋼板４１、１枚または２枚の第２積層鋼板４２、複数の第１積層鋼板４１、１枚または２枚の第２積層鋼板４２、複数の第１積層鋼板４１、という構造であっても良い。　 <1-2-4. Variations of rotor core and rotor>

The rotor core 40 has a first laminated steel plate 41 disposed at each of an upper end and a lower end in the axial direction, and a plurality of first laminated steel plates 41 between the first laminated steel plate 41 at the upper end in the axial direction and the first laminated steel plate 41 at the lower end in the axial direction. The structure which has arrange | positioned the two laminated steel plates 42 may be sufficient. In the rotor core 40, the upper end and the lower end in the axial direction are first laminated steel plates 41. The rotor core 40 may have a structure of a plurality of first laminated steel plates 41, one or two second laminated steel plates 42, and a plurality of first laminated steel plates 41 in order from the top. The rotor core 40 includes, in order from the top, a plurality of first laminated steel plates 41, one or two second laminated steel plates 42, a plurality of first laminated steel plates 41, one or two second laminated steel plates 42, A plurality of first laminated steel plates 41 may be used.
軸方向の上端及び下端の各々に、第２積層鋼板４２を配置したロータコア４０において、ロータコア４０の軸方向の長さに対して、マグネット３２の軸方向の長さが短い場合、上端に位置する第２積層鋼板４２の環状部４２ｃが磁気飽和して、下端に位置する第２積層鋼板４２の環状部４２ｃは磁気飽和しない場合が考えられる。その際に、上端と下端の環状部４２ｃにおける磁気飽和の有無によって、コイル２３に逆起電圧波形が上端部と下端部で歪量に差が発生する虞がある。そこで、ロータコア４０の上端及び下端に第２積層鋼板４２を設けないことにより、逆起電圧波形の歪を抑制することができる。その代わりに、軸方向上端の第１積層鋼板４１と、軸方向下端の第１積層鋼板４１と、の間に複数の第２積層鋼板４２を配置した構成にすることにより、上述したマグネット３２の磁束を有効活用しつつ、第１ベース部４１ａと片状部４１ｃとが、また、第２ベース部４２ａと環状部４２ｃとが、ばらばらになることを防止することができる。　 In the rotor core 40 in which the second laminated steel plate 42 is disposed at each of the upper end and the lower end in the axial direction, when the axial length of the magnet 32 is shorter than the axial length of the rotor core 40, it is positioned at the upper end. It is conceivable that the annular portion 42c of the second laminated steel plate 42 is magnetically saturated and the annular portion 42c of the second laminated steel plate 42 located at the lower end is not magnetically saturated. At this time, depending on the presence or absence of magnetic saturation in the annular portion 42c at the upper end and the lower end, the back electromotive force waveform in the coil 23 may have a difference in distortion amount between the upper end and the lower end. Therefore, the distortion of the counter electromotive voltage waveform can be suppressed by not providing the second laminated steel plate 42 at the upper end and the lower end of the rotor core 40. Instead, a plurality of second laminated steel plates 42 are arranged between the first laminated steel plate 41 at the upper end in the axial direction and the first laminated steel plate 41 at the lower end in the axial direction. While effectively utilizing the magnetic flux, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated. *
第１実施形態におけるロータ３において、第２積層鋼板４２の環状部４２ｃを、径方向外側から加圧することによって、マグネット３２を保持させることができる。これにより、樹脂部３４を設けなくてもマグネットを保持させることができるため、工数および材料を削減することができる。さらに、環状部４２ｃの小径部４２ｇを加圧することによって、柱部３３ａをなくすこともできる。これにより、より強固にマグネットを保持させ、さらに、磁束を有効活用することができる。　 In the rotor 3 in the first embodiment, the magnet 32 can be held by pressurizing the annular portion 42c of the second laminated steel plate 42 from the radially outer side. Thereby, since the magnet can be held without providing the resin portion 34, man-hours and materials can be reduced. Furthermore, the column portion 33a can be eliminated by pressurizing the small diameter portion 42g of the annular portion 42c. Thereby, a magnet can be hold | maintained more firmly and also magnetic flux can be used effectively. *
＜２．第２実施形態＞

＜２－１．ロータコアの詳細な構成＞

次に、本発明の例示的な第２実施形態のモータについて説明する。図６は、本発明の第２実施形態に係るモータのロータコアを上から見た斜視図である。図７は、本発明の第２実施形態に係るモータのロータコアを下から見た斜視図である。図８は、本発明の第２実施形態に係るロータコアの連結積層鋼板の平面図である。なお、この実施形態の基本的な構成は先に説明した第１実施形態と同じであるので、第１実施形態と共通する構成要素には前と同じ符号または同じ名称を付してその説明を省略する場合がある。　 <2. Second Embodiment>

<2-1. Detailed configuration of rotor core>

Next, a motor according to an exemplary second embodiment of the present invention will be described. FIG. 6 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from above. FIG. 7 is a perspective view of the rotor core of the motor according to the second embodiment of the present invention as seen from below. FIG. 8 is a plan view of a connected laminated steel sheet of rotor cores according to the second embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first embodiment described above, the same reference numerals or the same names as those in the first embodiment are assigned to the same constituent elements as those of the first embodiment, and the description thereof is omitted. May be omitted.
図６及び図７に示すロータコア４０は、第１積層鋼板４１及び第２積層鋼板４２に加えて、さらに連結積層鋼板４３を有する。連結積層鋼板４３は、第１積層鋼板４１及び第２積層鋼板４２と同様に、ロータコア４０の中心軸に対して径方向に拡がる。　 The rotor core 40 shown in FIGS. 6 and 7 further includes a connected laminated steel plate 43 in addition to the first laminated steel plate 41 and the second laminated steel plate 42. Similar to the first laminated steel plate 41 and the second laminated steel plate 42, the connected laminated steel plate 43 extends in the radial direction with respect to the central axis of the rotor core 40. *
＜２－１－１．連結積層鋼板の構成＞

図８に示す連結積層鋼板４３は、連結ベース部４３ａと、貫通部４３ｂと、連結環状部４３ｃと、連結部４３ｋと、を有する。　 <2-1-1. Structure of connected laminated steel plate>

The connection laminated steel plate 43 shown in FIG. 8 has a connection base part 43a, a penetration part 43b, a connection annular part 43c, and a connection part 43k.
連結ベース部４３ａ、貫通部４３ｂ及び連結環状部４３ｃは各々、第２積層鋼板４２の、第２ベース部４２ａ、貫通部４２ｂ及び環状部４２ｃと同じ構成を有する。すなわち、連結ベース部４３ａは、孔部４３ｄ及び凸部４３ｅを有する。貫通部４３ｂは、連結ベース部４３ａと、連結環状部４３ｃの大径部４３ｆと、の間の隙間として構成される。連結環状部４３ｃは、外径が異なり、周方向に交互に配置される大径部４３ｆ及び小径部４３ｇを有する。　 The connection base part 43a, the penetration part 43b, and the connection annular part 43c have the same configuration as the second base part 42a, the penetration part 42b, and the annular part 42c of the second laminated steel plate 42, respectively. That is, the connection base part 43a has the hole part 43d and the convex part 43e. The through portion 43b is configured as a gap between the connection base portion 43a and the large diameter portion 43f of the connection annular portion 43c. The connecting annular portion 43c has different outer diameters and includes large-diameter portions 43f and small-diameter portions 43g that are alternately arranged in the circumferential direction. *
なお、本実施形態において、連結積層鋼板４３の凸部４３ｅは、第１積層鋼板４１の凸部４１ｅ及び第２積層鋼板４２の凸部４２ｅよりも、周方向両側に大きい。そして、連結積層鋼板４３の凸部４３ｅの一部は、第１積層鋼板４１の貫通部４１ｂ及び第２積層鋼板４２の貫通部４２ｂの下方で、それらと重なる。これにより、貫通部４１ｂ及び貫通部４２ｂに挿入されるマグネット３２は、凸部４３ｅに引っ掛かる。したがって、マグネット３２の、ロータコア４０の下方への脱落を防止することが可能である。　 In addition, in this embodiment, the convex part 43e of the connection laminated steel plate 43 is larger on the both sides in the circumferential direction than the convex part 41e of the first laminated steel plate 41 and the convex part 42e of the second laminated steel plate 42. And a part of convex part 43e of the connection laminated steel plate 43 overlaps with them under the penetration part 41b of the 1st lamination steel plate 41, and the penetration part 42b of the 2nd lamination steel plate 42. FIG. Thereby, the magnet 32 inserted in the penetration part 41b and the penetration part 42b is hooked on the convex part 43e. Therefore, it is possible to prevent the magnet 32 from falling off the rotor core 40. *
連結部４３ｋは、径方向に関して、連結ベース部４３ａと、連結環状部４３ｃと、の間の領域に配置される。連結部４３ｋは、周方向に所定間隔で並べて配置される。連結部４３ｋは、周方向に隣り合う貫通部４３ｂの間の領域に配置される。連結部４３ｋは、その平面視形状が、径方向に延びる長板形状である。連結部４３ｋは、連結ベース部４３ａと、連結環状部４３ｃと、を連結する。より詳しく言えば、連結部４３ｋは、凸部４３ｅの径方向先端部と、小径部４３ｇの内縁部と、を連結する。　 The connecting portion 43k is disposed in a region between the connecting base portion 43a and the connecting annular portion 43c with respect to the radial direction. The connecting portions 43k are arranged side by side at a predetermined interval in the circumferential direction. The connection part 43k is arrange | positioned in the area | region between the penetration parts 43b adjacent to the circumferential direction. The connecting portion 43k has a long plate shape in plan view extending in the radial direction. The connecting portion 43k connects the connecting base portion 43a and the connecting annular portion 43c. More specifically, the connecting portion 43k connects the radial tip end portion of the convex portion 43e and the inner edge portion of the small diameter portion 43g. *
小径部４３ｇは、二箇所の接続部４３ｍを備える。接続部４３ｍは、連結部４３ｋの周方向両側に隣接して設けられる。すなわち、小径部４３ｇは、その内縁部に連結される一の連結部４３ｋに対して、周方向に隣接する二箇所の接続部４３ｍを有する。接続部４３ｍは、連結部４３ｋとの連結領域の反対側で、大径部４３ｆに接続する。　 The small diameter portion 43g includes two connection portions 43m. The connecting portion 43m is provided adjacent to both sides in the circumferential direction of the connecting portion 43k. That is, the small-diameter portion 43g has two connection portions 43m adjacent to each other in the circumferential direction with respect to one connection portion 43k connected to the inner edge portion. The connecting portion 43m is connected to the large diameter portion 43f on the opposite side of the connecting region with the connecting portion 43k. *
＜２－１－２．ロータコアの積層構成＞

図６及び図７に示すロータコア４０は、軸方向の下端に例えば１枚の連結積層鋼板４３が配置される。このとき、第１積層鋼板４１の片状部４１ｃと、第２積層鋼板４２の環状部４２ｃの大径部４２ｆと、連結積層鋼板４３の連結環状部４３ｃの大径部４３ｆと、が軸方向において重なり、外縁部の一部が揃う位置で、第１積層鋼板４１、第２積層鋼板４２及び連結積層鋼板４３が積層される。　 <2-1-2. Laminated structure of rotor core>

In the rotor core 40 shown in FIGS. 6 and 7, for example, one connected laminated steel plate 43 is disposed at the lower end in the axial direction. At this time, the piece-like portion 41 c of the first laminated steel plate 41, the large-diameter portion 42 f of the annular portion 42 c of the second laminated steel plate 42, and the large-diameter portion 43 f of the connected annular portion 43 c of the connected laminated steel plate 43 are axial. The first laminated steel plate 41, the second laminated steel plate 42, and the connected laminated steel plate 43 are laminated at a position where the outer edge portions are overlapped with each other.
この構成によれば、ロータコア４０の強度をより一層向上させることが可能である。さらに、第１ベース部４１ａと片状部４１ｃとが、また、第２ベース部４２ａと環状部４２ｃとが、ばらばらになることを防止することができる。　 According to this configuration, the strength of the rotor core 40 can be further improved. Furthermore, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated. *
なお、連結積層鋼板４３は、ロータコア４０の軸方向の上端に配置しても良い。さらに、連結積層鋼板４３は、ロータコア４０の軸方向の下端及び上端の両方に配置しても良い。この構成によれば、ロータコア４０の強度をさらに高めることが可能になる。また、上端の連結積層鋼板４３と、下端の連結積層鋼板４３と、は異なる形状であっても良い。例えば、上端はマグネット３２を挿通する貫通部を有する連結積層鋼板４３であり、下端はマグネット３２の脱落を防止する連結積層鋼板４３であっても良い。　 The connected laminated steel plates 43 may be disposed at the upper end of the rotor core 40 in the axial direction. Further, the connected laminated steel plates 43 may be disposed on both the lower end and the upper end of the rotor core 40 in the axial direction. According to this configuration, the strength of the rotor core 40 can be further increased. Further, the connected laminated steel plate 43 at the upper end and the connected laminated steel plate 43 at the lower end may have different shapes. For example, the upper end may be a connected laminated steel plate 43 having a penetrating portion through which the magnet 32 is inserted, and the lower end may be a connected laminated steel plate 43 that prevents the magnet 32 from falling off. *
＜３．第３実施形態＞

＜３－１．ロータコアの詳細な構成＞

　次に、本発明の例示的な第３実施形態のモータについて説明する。図９は、本発明の第３実施形態に係るロータコアの連結積層鋼板の部分拡大平面図である。なお、この実施形態の基本的な構成は先に説明した第１及び第２実施形態と同じであるので、それらの実施形態と共通する構成要素には前と同じ符号または同じ名称を付してその説明を省略する場合がある。　 <3. Third Embodiment>

<3-1. Detailed configuration of rotor core>

Next, a motor according to an exemplary third embodiment of the present invention will be described. FIG. 9 is a partially enlarged plan view of a connected laminated steel sheet of rotor cores according to a third embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first and second embodiments described above, the same reference numerals or the same names as those in the previous embodiment are assigned to the components common to those embodiments. The description may be omitted.
第３実施形態のロータコア４０は、図９に示す連結積層鋼板４３が、小径部４３ｇにおいて、一の連結部４３ｋに対して周方向に隣接する二箇所の接続部４３ｍ各々が、大径部４３ｆから切断される。接続部４３ｍは、積層された連結積層鋼板４３に対して、連結積層鋼板４３の径方向外側から内側に向かって切断される。したがって、第３実施形態のロータコア４０は、連結積層鋼板４３の接続部４３ｍが切断された積層鋼板が、軸方向に積層される構造となる。　 In the rotor core 40 of the third embodiment, the connection laminated steel plate 43 shown in FIG. 9 has a small diameter portion 43g, and each of the two connection portions 43m adjacent to the one connection portion 43k in the circumferential direction has a large diameter portion 43f. Disconnected from. The connection part 43m is cut | disconnected with respect to the laminated | stacked laminated laminated steel plate 43 toward the inner side from the radial direction outer side of the laminated laminated steel plate 43. As shown in FIG. Therefore, the rotor core 40 according to the third embodiment has a structure in which laminated steel plates obtained by cutting the connection portions 43m of the connected laminated steel plates 43 are laminated in the axial direction. *
接続部４３ｍは、大径部４３ｆと近接する箇所で切断される。切断された接続部４３ｍは、径方向内側に向かって折り曲げられる。折り曲げられた接続部４３ｍは、連結部４３ｋの貫通部４３ｂ側に隣接する。　 The connecting portion 43m is cut at a location close to the large diameter portion 43f. The cut connection part 43m is bent inward in the radial direction. The bent connection part 43m is adjacent to the penetrating part 43b side of the connecting part 43k. *
＜３－２．ロータコアの製造方法＞

　続いて、モータ用コアであるロータコア４０の製造方法について、図１０及び図１１を用いて説明する。図１０は、本発明の第３実施形態に係るロータコアの製造方法で用いる切断装置の一例を示す斜視図である。図１１は、本発明の第３実施形態に係るロータコアの製造方法で用いる切断工具の一例を示す部分拡大平面図である。　 <3-2. Manufacturing method of rotor core>

Then, the manufacturing method of the rotor core 40 which is a core for motors is demonstrated using FIG.10 and FIG.11. FIG. 10 is a perspective view showing an example of a cutting device used in the method for manufacturing a rotor core according to the third embodiment of the present invention. FIG. 11 is a partially enlarged plan view showing an example of a cutting tool used in the rotor core manufacturing method according to the third embodiment of the present invention.
第３実施形態のロータコア４０の製造方法は、連結積層鋼板４３を軸方向に積層する工程を含む。この工程では、軸方向の上端から下端まで連結積層鋼板４３が積層される。これにより、第３実施形態のロータコア４０は、連結積層鋼板４３の接続部４３ｍが切断された積層鋼板のみで構成される。なお、連結積層鋼板４３を含む工程であれば、第１積層鋼板４１や、第２積層鋼板４２などと組み合わせて積層しても良い。　 The manufacturing method of the rotor core 40 of 3rd Embodiment includes the process of laminating | stacking the connection laminated steel plate 43 to an axial direction. In this step, the connected laminated steel plates 43 are laminated from the upper end to the lower end in the axial direction. Thereby, the rotor core 40 of 3rd Embodiment is comprised only with the laminated steel plate from which the connection part 43m of the connection laminated steel plate 43 was cut | disconnected. In addition, if it is a process including the connection laminated steel plate 43, you may laminate | stack in combination with the 1st laminated steel plate 41, the 2nd laminated steel plate 42, etc. *
次に、第３実施形態のロータコア４０の製造方法は、接続部４３ｍを切断する工程を含む。この工程では、例えば図１０に示す切断装置１００が用いられる。　 Next, the manufacturing method of the rotor core 40 according to the third embodiment includes a step of cutting the connection portion 43m. In this step, for example, a cutting device 100 shown in FIG. 10 is used. *
切断装置１００は、台座部１０１と、押さえ部材１０２と、切断工具１０３と、を有する。ロータコア４０は、台座部１０１の上面に、軸方向を略垂直にして載置される。ロータコア４０の上方には、押さえ部材１０２が配置される。押さえ部材１０２は、台座部１０１の上面との間でロータコア４０を挟んで保持する。　 The cutting device 100 includes a pedestal 101, a pressing member 102, and a cutting tool 103. The rotor core 40 is placed on the upper surface of the pedestal portion 101 with the axial direction being substantially vertical. A pressing member 102 is disposed above the rotor core 40. The pressing member 102 holds the rotor core 40 between the upper surface of the pedestal portion 101. *
切断工具１０３は、台座部１０１の上面に配置されたロータコア４０の、径方向外側に配置される。切断工具１０３は、ロータコア４０の径方向に沿って移動が可能である。切断工具１０３は、ロータコア４０の外周面と対向する先端部を、ロータコア４０の外周面押し当てることができる。　 The cutting tool 103 is arrange | positioned at the radial direction outer side of the rotor core 40 arrange | positioned at the upper surface of the base part 101. FIG. The cutting tool 103 can move along the radial direction of the rotor core 40. The cutting tool 103 can press the outer peripheral surface of the rotor core 40 with the tip portion facing the outer peripheral surface of the rotor core 40. *
切断工具１０３は、ロータコア４０の外周面と対向する先端部に、図１１に示す刃部１０３ａを有する。刃部１０３ａは、ロータコア４０の軸方向に沿って延びる。　 The cutting tool 103 has a blade portion 103 a shown in FIG. 11 at the tip portion facing the outer peripheral surface of the rotor core 40. The blade portion 103 a extends along the axial direction of the rotor core 40. *
刃部１０３ａは、周方向に離隔した二箇所に設けられる。二箇所の刃部１０３ａは各々、周方向の外側の外面に角部１０３ｂ及び平面部１０３ｃを有する。二箇所の刃部１０３ａは各々、角部１０３ｂ及び平面部１０３ｃによって、二箇所の接続部４３ｍ各々を大径部４３ｆから切断する。　 The blade part 103a is provided in two places spaced apart in the circumferential direction. Each of the two blade portions 103a has a corner portion 103b and a flat surface portion 103c on the outer surface on the outer side in the circumferential direction. The two blade portions 103a respectively cut the two connection portions 43m from the large diameter portion 43f by the corner portion 103b and the flat portion 103c. *
第３実施形態のロータコア４０の製造方法は、連結積層鋼板４３の接続部４３ｍを切断する工程を含むので、周方向に隣り合う連結環状部４３ｃの大径部４３ｆが、小径部４３ｇを介して周方向に繋がった状態を解消することができる。これにより、切断前の接続部４３ｍで発生する虞がある磁束の漏れを抑制することができる。したがって、ロータコア４０において、磁気ループの発生を抑制することが可能になる。　 Since the manufacturing method of the rotor core 40 of 3rd Embodiment includes the process of cut | disconnecting the connection part 43m of the connection laminated steel plate 43, the large diameter part 43f of the connection cyclic | annular part 43c adjacent to the circumferential direction passes through the small diameter part 43g. The state connected in the circumferential direction can be eliminated. Thereby, the leakage of the magnetic flux which may generate | occur | produce in the connection part 43m before a cutting | disconnection can be suppressed. Therefore, it is possible to suppress the occurrence of a magnetic loop in the rotor core 40. *
接続部４３ｍを切断する工程では、連結積層鋼板４３を径方向外側から内側に向かって切断する。この構成によれば、高出力のプレス装置を必要とせず、切断装置１００を利用して、連結環状部４３ｃの接続部４３ｍを切断することができる。したがって、ロータコア４０の製造装置の大型化、コストアップを抑制することが可能である。　 In the step of cutting the connecting portion 43m, the connected laminated steel plate 43 is cut from the radially outer side to the inner side. According to this structure, the high output press apparatus is not required, but the connection part 43m of the connection annular part 43c can be cut | disconnected using the cutting device 100. FIG. Therefore, it is possible to suppress an increase in the size and cost of the manufacturing apparatus for the rotor core 40. *
積層鋼板を軸方向に打ち抜くという従来の製造方法では、半抜き工程等の追加工程が予め必要であった。これに対して、第２実施形態のロータコア４０の変形例の製造方法は、追加工程を必要とせず、所望の形状に成形することができる。　 In a conventional manufacturing method in which a laminated steel sheet is punched in the axial direction, an additional process such as a half-punch process is required in advance. On the other hand, the manufacturing method of the modification of the rotor core 40 of 2nd Embodiment can shape | mold in a desired shape, without requiring an additional process. *
また、積層鋼板を軸方向に打ち抜くという従来の製造方法では、ロータコアの軸方向下端の積層鋼板にダレやバリが生じる虞があった。これに対して、第２実施形態のロータコア４０の変形例の製造方法は、径方向外側から切断するので、ロータコア４０の軸方向下端の積層鋼板において、切断に必要な切断距離が短くなり、ダレやバリの発生を防止することができる。　 Further, in the conventional manufacturing method in which the laminated steel sheet is punched in the axial direction, there is a possibility that sagging or burrs may occur in the laminated steel sheet at the lower end in the axial direction of the rotor core. On the other hand, the manufacturing method of the modified example of the rotor core 40 of the second embodiment cuts from the radially outer side. Therefore, in the laminated steel sheet at the lower end in the axial direction of the rotor core 40, the cutting distance necessary for cutting is shortened. And generation of burrs can be prevented. *
次に、第３実施形態のロータコア４０の製造方法が、連結部４３ｋを除去する工程を含むことにしても良い。これにより、除去前の連結部４３ｋで発生する虞がある磁気飽和の発生を抑制することができる。したがって、ロータコア４０において、磁気ループの発生を効果的に抑制することが可能になる。　 Next, the method for manufacturing the rotor core 40 of the third embodiment may include a step of removing the connecting portion 43k. Thereby, generation | occurrence | production of the magnetic saturation which may generate | occur | produce in the connection part 43k before removal can be suppressed. Therefore, in the rotor core 40, generation | occurrence | production of a magnetic loop can be suppressed effectively. *
なお、図１０及び図１１を用いて説明した上記切断装置１００の構成は一例であり、連結積層鋼板４３を径方向外側から内側に向かって切断することができれば、他の構成であっても良い。　 In addition, the structure of the said cutting device 100 demonstrated using FIG.10 and FIG.11 is an example, and another structure may be sufficient if it can cut | disconnect the connection laminated steel plate 43 from the radial direction outer side to an inner side. . *
＜３－２－１．ロータコアの製造方法の切断工程の第１例＞

　続いて、ロータコア４０の製造方法に関して、切断工程の第１例について、図１２を用いて説明する。図１２は、本発明の第３実施形態に係るロータコアの製造方法の切断工程の第１例を示す連結積層鋼板の部分拡大平面図である。　 <3-2-1. First Example of Cutting Process of Rotor Core Manufacturing Method>

Next, a first example of the cutting process regarding the method for manufacturing the rotor core 40 will be described with reference to FIG. FIG. 12 is a partially enlarged plan view of a connected laminated steel sheet showing a first example of a cutting step of the method for manufacturing a rotor core according to the third embodiment of the present invention.
第３実施形態のロータコア４０の製造方法において、接続部４３ｍを切断する工程の第１例では、図１１に示す切断工具１０３が用いられる。図１２に示すこの切断工程では、一の連結部４３ｋにおける周方向に隣接する二箇所の接続部４３ｍが、同時に切断される。図９に示すように、切断された二箇所の接続部４３ｍは各々、径方向内側に向かって折り曲げられる。　 In the manufacturing method of the rotor core 40 of the third embodiment, the cutting tool 103 shown in FIG. 11 is used in the first example of the step of cutting the connection portion 43m. In this cutting step shown in FIG. 12, two connecting portions 43m adjacent to each other in the circumferential direction in one connecting portion 43k are cut simultaneously. As shown in FIG. 9, the two cut connection portions 43m are each bent toward the inside in the radial direction. *
まず、二箇所の接続部４３ｍが、同時に切断されて折り曲げられる。次に、ロータコア４０が、周方向に隣り合う連結部４３ｋの間の角度だけ、中心軸回りに回転される。続いて、次の一の連結部４３ｋにおける周方向に隣接する二箇所の接続部４３ｍが、同時に切断され、折り曲げられる。引き続き、ロータコア４０の外縁部全域にわたって、二箇所の接続部４３ｍの切断、折り曲げと、ロータコア４０の回転と、が繰り返される。　 First, the two connection portions 43m are simultaneously cut and bent. Next, the rotor core 40 is rotated around the central axis by an angle between the connecting portions 43k adjacent in the circumferential direction. Subsequently, the two connecting portions 43m adjacent in the circumferential direction in the next one connecting portion 43k are simultaneously cut and bent. Subsequently, the cutting and bending of the two connection portions 43m and the rotation of the rotor core 40 are repeated over the entire outer edge portion of the rotor core 40. *
この方法によれば、二箇所の接続部４３ｍを同時に切断するので、切断時に生じる虞があるロータコア４０の、特に連結部４３ｋの変形を最小限に抑制することができる。また、切断時に、近接する二箇所の接続部４３ｍの間に配置された一箇所の連結部４３ｋを保持しながら切断することができる。これにより、切断作業の効率を向上させることが可能である。　 According to this method, since the two connection portions 43m are cut at the same time, the deformation of the rotor core 40, particularly the connection portion 43k, which may occur at the time of cutting, can be suppressed to a minimum. Moreover, at the time of cutting | disconnection, it can cut | disconnect, hold | maintaining the one connection part 43k arrange | positioned between the connection parts 43m of two places which adjoined. Thereby, it is possible to improve the efficiency of cutting work. *
＜３－２－２．ロータコアの製造方法の切断工程の第２例＞

　続いて、ロータコア４０の製造方法に関して、切断工程の第２例について、図１３を用いて説明する。図１３は、本発明の第３実施形態に係るロータコア４０の製造方法の切断工程の第２例を示す連結積層鋼板の平面図である。　 <3-2-2. Second Example of Cutting Process of Rotor Core Manufacturing Method>

Then, regarding the manufacturing method of the rotor core 40, the 2nd example of a cutting process is demonstrated using FIG. FIG. 13: is a top view of the connection laminated steel plate which shows the 2nd example of the cutting process of the manufacturing method of the rotor core 40 which concerns on 3rd Embodiment of this invention.
第３実施形態のロータコア４０の製造方法において、一箇所の刃部１０３ａのみを有する切削工具１０４が用いられる（図１３参照）。図１３に示すこの切断工程では、連結環状部４３ｃの、周方向に隣り合う二の連結部４３ｋに対して周方向内側の二箇所の接続部４３ｍが、同時に切断される。切断された二箇所の接続部４３ｍは各々、例えば径方向内側に向かって折り曲げられる。　 In the manufacturing method of the rotor core 40 of the third embodiment, a cutting tool 104 having only one blade portion 103a is used (see FIG. 13). In this cutting step shown in FIG. 13, two connecting portions 43m on the inner side in the circumferential direction are simultaneously cut with respect to the two connecting portions 43k adjacent to each other in the circumferential direction of the connecting annular portion 43c. Each of the two cut connection portions 43m is bent, for example, radially inward. *
まず、二箇所の接続部４３ｍが、同時に切断されて折り曲げられる。次に、ロータコア４０が、周方向に隣り合う連結部４３ｋの間の角度だけ、中心軸回りに回転される。続いて、次の周方向に隣り合う二の連結部４３ｋに対して周方向内側の二箇所の接続部４３ｍが、同時に切断され、折り曲げられる。引き続き、ロータコア４０の外縁部全域にわたって、二箇所の接続部４３ｍの切断、折り曲げと、ロータコア４０の回転と、が繰り返される。　 First, the two connection portions 43m are simultaneously cut and bent. Next, the rotor core 40 is rotated around the central axis by an angle between the connecting portions 43k adjacent in the circumferential direction. Subsequently, two connecting portions 43m on the inner side in the circumferential direction with respect to the two connecting portions 43k adjacent in the next circumferential direction are simultaneously cut and bent. Subsequently, the cutting and bending of the two connection portions 43m and the rotation of the rotor core 40 are repeated over the entire outer edge portion of the rotor core 40. *
この方法によれば、二箇所の接続部４３ｍを同時に切断するので、切断時に生じる虞があるロータコア４０の、特に連結部４３ｋの変形を最小限に抑制することができる。また、連結環状部４３ｃの、周方向に隣り合う二箇所の連結部４３ｋの間の領域である大径部４３ｆの形状、大きさの均一化を図ることが可能である。　 According to this method, since the two connection portions 43m are cut at the same time, the deformation of the rotor core 40, particularly the connection portion 43k, which may occur at the time of cutting, can be suppressed to a minimum. Further, it is possible to make the shape and size of the large-diameter portion 43f, which is a region between the two connecting portions 43k adjacent to each other in the circumferential direction of the connecting annular portion 43c uniform. *
＜３－２－３．ロータコアの製造方法の切断工程の第３例＞

　続いて、ロータコア４０の製造方法に関して、切断工程の第３例について、図１４を用いて説明する。図１４は、本発明の第３実施形態に係るロータコアの製造方法の切断工程の第３例を示す連結積層鋼板の平面図である。　 <3-2-3. Third Example of Cutting Process of Rotor Core Manufacturing Method>

Then, regarding the manufacturing method of the rotor core 40, the 3rd example of a cutting process is demonstrated using FIG. FIG. 14: is a top view of the connection laminated steel plate which shows the 3rd example of the cutting process of the manufacturing method of the rotor core which concerns on 3rd Embodiment of this invention.
第３実施形態のロータコア４０の製造方法において、一箇所の刃部１０３ａのみを有する切削工具１０４が用いられる（図１４参照）。図１４に示すこの切断工程では、互いが中心軸を隔てた反対側に配置された二箇所の接続部４３ｍが、同時に切断される。切断された二箇所の接続部４３ｍは各々、例えば径方向内側に向かって折り曲げられる。　 In the manufacturing method of the rotor core 40 of the third embodiment, a cutting tool 104 having only one blade portion 103a is used (see FIG. 14). In this cutting step shown in FIG. 14, the two connection portions 43 m disposed on the opposite sides with the central axis being separated from each other are simultaneously cut. Each of the two cut connection portions 43m is bent, for example, radially inward. *
まず、二箇所の接続部４３ｍが、同時に切断されて折り曲げられる。次に、ロータコア４０が、周方向に隣り合う連結部４３ｋの間の角度だけ、中心軸回りに回転される。続いて、次の互いが中心軸を隔てた反対側に配置された二箇所の接続部４３ｍが、同時に切断され、折り曲げられる。引き続き、ロータコア４０の外縁部全域にわたって、二箇所の接続部４３ｍの切断、折り曲げと、ロータコア４０の回転と、が繰り返される。　 First, the two connection portions 43m are simultaneously cut and bent. Next, the rotor core 40 is rotated around the central axis by an angle between the connecting portions 43k adjacent in the circumferential direction. Subsequently, the two connection portions 43m arranged next to each other on the opposite sides with the central axis are cut and bent at the same time. Subsequently, the cutting and bending of the two connection portions 43m and the rotation of the rotor core 40 are repeated over the entire outer edge portion of the rotor core 40. *
この方法によれば、二箇所の接続部４３ｍを同時に切断するので、切断時に生じる虞があるロータコア４０の、特に連結部４３ｋの変形を最小限に抑制することができる。　 According to this method, since the two connection portions 43m are cut at the same time, the deformation of the rotor core 40, particularly the connection portion 43k, which may occur at the time of cutting, can be suppressed to a minimum. *
なお、第３実施形態で用いる切断工程については、モータ用コアであれば、ロータコアに限らず、ステータコアに採用しても良い。例えば、ステータコアに設けられるスロットに向かって切断する工程などが考えられる。　 In addition, about the cutting process used in 3rd Embodiment, if it is a core for motors, you may employ | adopt not only a rotor core but a stator core. For example, the process etc. which cut | disconnect toward the slot provided in a stator core can be considered. *
＜４．第４実施形態＞

＜４－１．ロータコアの詳細な構成＞

　次に、本発明の例示的な第４実施形態のモータについて説明する。図１５は、本発明の第４実施形態に係るモータのロータコアを上から見た斜視図である。図１６は、本発明の第４実施形態に係るモータのロータコアを下から見た斜視図である。図１７は、本発明の第４実施形態に係るロータコアの連結積層鋼板の平面図である。なお、この実施形態の基本的な構成は先に説明した第１及び第２の実施形態と同じであるので、それらの実施形態と共通する構成要素には前と同じ符号または同じ名称を付してその説明を省略する場合がある。　 <4. Fourth Embodiment>

<4-1. Detailed configuration of rotor core>

Next, a motor according to an exemplary fourth embodiment of the present invention will be described. FIG. 15: is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the top. FIG. 16: is the perspective view which looked at the rotor core of the motor which concerns on 4th Embodiment of this invention from the bottom. FIG. 17 is a plan view of a laminated laminated steel sheet of rotor cores according to a fourth embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first and second embodiments described above, the same reference numerals or the same names as those in the previous embodiment are assigned to components common to those embodiments. The description thereof may be omitted.
図１５及び図１６に示すロータコア４０は、第１積層鋼板４１及び第２積層鋼板４２に加えて、さらに連結積層鋼板４４を有する。連結積層鋼板４４は、第１積層鋼板４１及び第２積層鋼板４２と同様に、ロータコア４０の中心軸に対して径方向に拡がる。　 The rotor core 40 shown in FIGS. 15 and 16 further includes a connected laminated steel plate 44 in addition to the first laminated steel plate 41 and the second laminated steel plate 42. Similar to the first laminated steel plate 41 and the second laminated steel plate 42, the coupled laminated steel plate 44 extends in the radial direction with respect to the central axis of the rotor core 40. *
＜４－１－１．連結積層鋼板の構成＞

　図１７に示す連結積層鋼板４４は、連結ベース部４４ａと、貫通部４４ｂと、連結片状部４４ｃと、連結部４４ｋと、を有する。　 <4-1-1. Structure of connected laminated steel plate>

The connection laminated steel plate 44 shown in FIG. 17 includes a connection base portion 44a, a through portion 44b, a connection piece-like portion 44c, and a connection portion 44k.
連結ベース部４４ａは、凹部４４ｅを有する。凹部４４ｅは、中心軸に対する、周方向に隣り合う連結片状部４４ｃ同士の間の角度領域において設けられる。すなわち、凹部４４ｅは、周方向に隣り合う連結片状部４４ｃ各々の、周方向に対向する端部各々と、中心軸と、で囲まれた扇形状の領域に設けられる。言い換えれば、凹部４４ｅは、ロータ３の柱部３３ａに設けられる。中心軸に対する、周方向に隣り合う連結片状部４４ｃ同士の間の、扇形状の角度領域の一例を、図１７に一点鎖線で描画した。　 The connection base portion 44a has a recess 44e. The concave portion 44e is provided in an angular region between the connecting piece-like portions 44c adjacent to each other in the circumferential direction with respect to the central axis. That is, the concave portion 44e is provided in a fan-shaped region surrounded by each of the end portions facing each other in the circumferential direction and the central axis of each of the connecting piece-like portions 44c adjacent in the circumferential direction. In other words, the concave portion 44 e is provided in the column portion 33 a of the rotor 3. An example of a fan-shaped angle region between the connecting piece-like portions 44c adjacent to each other in the circumferential direction with respect to the central axis is depicted by a one-dot chain line in FIG. *
凹部４４ｅは、連結ベース部４４ａの外縁部４４ｗから径方向内側に向かって凹む。連結ベース部４４ａが多角形である場合、凹部４４ｅは、連結ベース部４４ａの頂点各々から径方向内側に向かって凹む。連結ベース部４４ａが凹部４４ｅを有することで、貫通部４１ｂ、４２ｂにマグネット３２を挿入した後、第１ベース部４１ａ、第２ベース部４２ａ及び連結ベース部４４ａの径方向外側に合成樹脂、接着剤等を流し込むと、凹部４４ｅに合成樹脂、接着剤等が浸入する。これにより、連結片状部４４ｃ及びマグネット３２を強固に固定することができる。　 The recess 44e is recessed radially inward from the outer edge 44w of the connection base portion 44a. When the connection base part 44a is polygonal, the recessed part 44e is dented toward the radial inner side from each vertex of the connection base part 44a. Since the connecting base portion 44a has the recess 44e, the magnet 32 is inserted into the through portions 41b and 42b, and then the synthetic resin and the adhesive are bonded to the outer sides in the radial direction of the first base portion 41a, the second base portion 42a, and the connecting base portion 44a. When an agent or the like is poured, a synthetic resin, an adhesive, or the like enters the recess 44e. Thereby, the connection piece-like part 44c and the magnet 32 can be firmly fixed. *
貫通部４４ｂは、連結ベース部４４ａと、連結片状部４４ｃと、の間の隙間として構成される。貫通部４４ｂの周方向の両側には、連結部４４ｋが設けられる。連結部４４ｋは、第１積層鋼板４１の貫通部４１ｂ及び第２積層鋼板４２の貫通部４２ｂの下方で、それらと重なる。これにより、貫通部４１ｂ及び貫通部４２ｂに挿入されるマグネット３２は、連結部４４ｋに引っ掛かる。したがって、マグネット３２の、ロータコア４０の下方への脱落を防止することが可能である。　 The through portion 44b is configured as a gap between the connection base portion 44a and the connection piece portion 44c. Connecting portions 44k are provided on both sides of the through portion 44b in the circumferential direction. The connecting portion 44k overlaps with the lower portion of the penetrating portion 41b of the first laminated steel plate 41 and the penetrating portion 42b of the second laminated steel plate 42. Thereby, the magnet 32 inserted in the penetration part 41b and the penetration part 42b is hooked by the connection part 44k. Therefore, it is possible to prevent the magnet 32 from falling off the rotor core 40. *
連結片状部４４ｃは、連結ベース部４４ａの径方向外側に、貫通部４４ｂを介して離隔して配置される。ここで言う離隔には、連結片状部４４ｃと、連結ベース部４４ａとが、連結部４４ｋで一部連結されている形態を含む。連結片状部４４ｃは、例えば８個が周方向に所定間隔で配置される。連結片状部４４ｃは、その平面視形状が、中心がシャフト３１の軸線よりも径方向外側にずれて、ロータ３の半径よりも小さい半径の円弧と、この円弧の径方向内側に位置する弦に相当する直線部と、を有する略半円形状である。連結片状部４４ｃの径方向内側の直線部は、連結ベース部４４ａの外縁部４４ｗと略平行である。　 The connecting piece-like portion 44c is arranged on the outer side in the radial direction of the connecting base portion 44a so as to be separated via the through portion 44b. The separation mentioned here includes a form in which the connecting piece-like portion 44c and the connecting base portion 44a are partially connected by the connecting portion 44k. For example, eight connecting piece portions 44c are arranged at predetermined intervals in the circumferential direction. The connecting piece-like portion 44c has a plan view shape whose center is shifted radially outward from the axis of the shaft 31 and has a radius smaller than the radius of the rotor 3, and a chord located on the radially inner side of the arc. And a substantially semicircular shape having a straight line portion corresponding to. The straight portion on the radially inner side of the connecting piece-like portion 44c is substantially parallel to the outer edge portion 44w of the connecting base portion 44a. *
連結部４４ｋは、径方向に関して、連結ベース部４４ａと、連結片状部４４ｃと、の間の領域に配置される。連結部４４ｋは、一箇所の連結片状部４４ｃに対して、連結片状部４４ｃの周方向両端部の各々に設けられ、互いが平行に延びる。連結部４４ｋは、その平面視形状が、略径方向に延びる長板形状である。連結部４４ｋは、連結ベース部４４ａと、連結片状部４４ｃと、を連結する。より詳しく言えば、連結部４４ｋは、凹部４４ｅの周方向両側領域と、連結片状部４４ｃの周方向両端部の直線部と、を接続する。　 The connecting portion 44k is disposed in a region between the connecting base portion 44a and the connecting piece-like portion 44c in the radial direction. The connecting portion 44k is provided at each of both ends in the circumferential direction of the connecting piece-like portion 44c with respect to one connecting piece-like portion 44c, and extends in parallel with each other. The connecting portion 44k has a long plate shape in plan view extending in a substantially radial direction. The connecting portion 44k connects the connecting base portion 44a and the connecting piece-like portion 44c. More specifically, the connecting portion 44k connects both circumferential regions of the recessed portion 44e and the straight portions at both ends of the connecting piece-like portion 44c in the circumferential direction. *
＜４－１－２．ロータコアの積層構成＞

　図１５及び図１６に示すロータコア４０は、軸方向の上端及び下部の各々に例えば２枚の第２積層鋼板４２が配置され、軸方向上端の第２積層鋼板４２と、軸方向下部の第２積層鋼板４２と、の間に複数の第１積層鋼板４１が配置される。軸方向に積層される複数の第１積層鋼板４１の中間部にも、例えば２枚の第２積層鋼板４２が配置される。さらに、軸方向の下端に例えば１枚の連結積層鋼板４４が配置される。このとき、第１積層鋼板４１の片状部４１ｃと、第２積層鋼板４２の環状部４２ｃの大径部４２ｆと、連結積層鋼板４４の連結片状部４４ｃと、が軸方向において重なり、外周縁の一部が揃う位置で、第１積層鋼板４１、第２積層鋼板４２及び連結積層鋼板４４が積層される。　 <4-1-2. Laminated structure of rotor core>

The rotor core 40 shown in FIGS. 15 and 16 includes, for example, two second laminated steel plates 42 disposed at each of the upper end and the lower portion in the axial direction, and the second laminated steel plate 42 at the upper end in the axial direction and the second laminated steel plate 42 at the lower portion in the axial direction. A plurality of first laminated steel plates 41 are arranged between the laminated steel plates 42. For example, two second laminated steel plates 42 are also arranged in the middle part of the plurality of first laminated steel plates 41 laminated in the axial direction. Further, for example, one connected laminated steel plate 44 is disposed at the lower end in the axial direction. At this time, the piece-like portion 41c of the first laminated steel plate 41, the large-diameter portion 42f of the annular portion 42c of the second laminated steel plate 42, and the connecting piece-like portion 44c of the connected laminated steel plate 44 overlap in the axial direction. The 1st laminated steel plate 41, the 2nd laminated steel plate 42, and the connection laminated steel plate 44 are laminated | stacked in the position where a part of periphery is aligned.
この構成によれば、ロータコア４０の強度をより一層向上させることが可能である。また、貫通部４１ｂ、４２ｂにマグネット３２を挿入した場合、軸方向において、連結部４４ｋにマグネット３２が引っ掛かる。これにより、マグネット３２の、ロータコア４０からの脱落を防止することが可能である。さらに、第１ベース部４１ａと片状部４１ｃとが、また、第２ベース部４２ａと環状部４２ｃとが、ばらばらになることを防止することができる。　 According to this configuration, the strength of the rotor core 40 can be further improved. Further, when the magnet 32 is inserted into the through portions 41b and 42b, the magnet 32 is hooked on the connecting portion 44k in the axial direction. Thereby, it is possible to prevent the magnet 32 from falling off the rotor core 40. Furthermore, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated. *
なお、連結積層鋼板４４は、ロータコア４０の軸方向の上端に配置しても良い。さらに、連結積層鋼板４４は、ロータコア４０の軸方向の下端及び上端の両方に配置しても良い。この構成によれば、ロータコア４０の強度をさらに高めることが可能になる。また、上端の連結積層鋼板４４と、下端の連結積層鋼板４４と、は異なる形状であっても良い。例えば、上端はマグネット３２を挿通する貫通部を有する連結積層鋼板４４であり、下端はマグネット３２の脱落を防止する連結積層鋼板４４であっても良い。　 The connected laminated steel plate 44 may be disposed at the upper end in the axial direction of the rotor core 40. Further, the connected laminated steel plates 44 may be disposed on both the lower end and the upper end of the rotor core 40 in the axial direction. According to this configuration, the strength of the rotor core 40 can be further increased. Further, the upper end connected laminated steel plates 44 and the lower end connected laminated steel plates 44 may have different shapes. For example, the upper end may be a connected laminated steel plate 44 having a through portion through which the magnet 32 is inserted, and the lower end may be a connected laminated steel plate 44 that prevents the magnet 32 from falling off. *
また、ロータコア４０は、第１積層鋼板４１が凸部４１ｅを有し、第２積層鋼板４２が凸部４２ｅを有し、連結積層鋼板４４が凹部４４ｅを有する。貫通部４１ｂ、４２ｂにマグネット３２を挿入した場合に、凸部４１ｅ、４２ｅにマグネット３２を接触させることができる。これにより、マグネット３２の周方向における位置決めを行うことができる。また、貫通部４１ｂ、４２ｂにマグネット３２を挿入した後、第１ベース部４１ａ等の径方向外側に合成樹脂、接着剤等を流し込むと、凹部４４ｅに合成樹脂、接着剤等が浸入する。これにより、マグネット３２を強固に固定することができる。したがって、マグネット３２の位置決めと、マグネット３２の強固な固定と、の両者を実現することが可能である。　 In the rotor core 40, the first laminated steel plate 41 has a convex portion 41e, the second laminated steel plate 42 has a convex portion 42e, and the connected laminated steel plate 44 has a concave portion 44e. When the magnet 32 is inserted into the through portions 41b and 42b, the magnet 32 can be brought into contact with the convex portions 41e and 42e. Thereby, the positioning of the magnet 32 in the circumferential direction can be performed. Further, after the magnet 32 is inserted into the through portions 41b and 42b, when synthetic resin, adhesive, or the like is poured into the radially outer side of the first base portion 41a, the synthetic resin, adhesive, or the like enters the recess 44e. Thereby, the magnet 32 can be firmly fixed. Therefore, it is possible to realize both positioning of the magnet 32 and firm fixation of the magnet 32. *
＜５．第５実施形態＞

＜５－１．ロータコアの詳細な構成＞

　次に、本発明の例示的な第５実施形態のモータについて説明する。図１８は、本発明の第５実施形態に係るモータのロータコアを上から見た斜視図である。図１９は、本発明の第５実施形態に係るモータのロータコアを下から見た斜視図である。図２０は、本発明の第５実施形態に係るロータコアの連結積層鋼板の平面図である。なお、この実施形態の基本的な構成は先に説明した第１、第２及び第３の実施形態と同じであるので、それらの実施形態と共通する構成要素には前と同じ符号または同じ名称を付してその説明を省略する場合がある。　 <5. Fifth Embodiment>

<5-1. Detailed configuration of rotor core>

Next, a motor according to a fifth exemplary embodiment of the present invention will be described. FIG. 18 is a perspective view of a rotor core of a motor according to a fifth embodiment of the present invention as viewed from above. FIG. 19 is a perspective view of a rotor core of a motor according to the fifth embodiment of the present invention as seen from below. FIG. 20 is a plan view of a laminated laminated steel sheet for rotor cores according to a fifth embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first, second, and third embodiments described above, the same reference numerals or the same names are used for the components common to those embodiments. The description may be omitted.
図１８及び図１９に示すロータコア４０は、第１積層鋼板４１及び第２積層鋼板４２に加えて、さらに連結積層鋼板４５を有する。連結積層鋼板４５は、第１積層鋼板４１及び第２積層鋼板４２と同様に、ロータコア４０の中心軸に対して径方向に拡がる。　 The rotor core 40 shown in FIGS. 18 and 19 further includes a connected laminated steel plate 45 in addition to the first laminated steel plate 41 and the second laminated steel plate 42. Similar to the first laminated steel plate 41 and the second laminated steel plate 42, the connected laminated steel plate 45 extends in the radial direction with respect to the central axis of the rotor core 40. *
＜５－１－１．連結積層鋼板の構成＞

　図２０に示す連結積層鋼板４５は、連結ベース部４５ａと、貫通部４５ｂと、連結片状部４５ｃと、連結部４５ｋと、を有する。　 <5-1-1. Structure of connected laminated steel plate>

The connection laminated steel plate 45 shown in FIG. 20 has a connection base part 45a, a penetration part 45b, a connection piece part 45c, and a connection part 45k.
連結ベース部４５ａ、貫通部４５ｂ及び連結片状部４５ｃは各々、第４実施形態の連結積層鋼板４４の連結ベース部４４ａ、貫通部４４ｂ及び連結片状部４４ｃと同じ構成を有する。すなわち、連結ベース部４５ａは、孔部４５ｄ及び凹部４５ｅを有する。　 The connection base part 45a, the penetration part 45b, and the connection piece 45c have the same configurations as the connection base part 44a, the penetration part 44b, and the connection piece 44c of the connection laminated steel sheet 44 of the fourth embodiment. That is, the connection base part 45a has the hole part 45d and the recessed part 45e. *
貫通部４５ｂは、連結ベース部４５ａと、連結片状部４５ｃと、の間の隙間として構成される。貫通部４５ｂの周方向の両側には、連結部４５ｋが設けられる。連結部４５ｋは、第１積層鋼板４１の貫通部４１ｂ及び第２積層鋼板４２の貫通部４２ｂの下方で、それらと重なる。これにより、貫通部４１ｂ及び貫通部４２ｂに挿入されるマグネット３２は、連結部４５ｋに引っ掛かる。したがって、マグネット３２の、ロータコア４０の下方への脱落を防止することが可能である。　 The through portion 45b is configured as a gap between the connection base portion 45a and the connection piece portion 45c. Connecting portions 45k are provided on both sides of the through portion 45b in the circumferential direction. The connecting portion 45k overlaps with the lower portion of the penetrating portion 41b of the first laminated steel plate 41 and the penetrating portion 42b of the second laminated steel plate 42. Thereby, the magnet 32 inserted in the penetration part 41b and the penetration part 42b is hooked by the connection part 45k. Therefore, it is possible to prevent the magnet 32 from falling off the rotor core 40. *
連結片状部４５ｃは、連結ベース部４５ａの径方向外側に、貫通部４５ｂを介して離隔して配置される。ここで言う離隔には、連結片状部４５ｃと、連結ベース部４５ａとが、連結部４５ｋで一部連結されている形態を含む。連結片状部４５ｃは、例えば８個が周方向に所定間隔で配置される。連結片状部４５ｃは、その平面視形状が、中心がシャフト３１の軸線よりも径方向外側にずれて、ロータ３の半径よりも小さい半径の円弧と、この円弧の径方向内側に位置する弦に相当する直線部と、を有する略半円形状である。連結片状部４５ｃの径方向内側の直線部は、連結ベース部４５ａの外縁部４５ｗと略平行である。　 The connecting piece-like portion 45c is arranged on the outer side in the radial direction of the connecting base portion 45a via a through portion 45b. The separation referred to here includes a form in which the connecting piece 45c and the connecting base 45a are partially connected by the connecting portion 45k. For example, eight connecting piece portions 45c are arranged at predetermined intervals in the circumferential direction. The connecting piece-like portion 45c has a shape in plan view whose center is shifted radially outward from the axis of the shaft 31 and has a radius smaller than the radius of the rotor 3, and a chord located radially inward of the arc. And a substantially semicircular shape having a straight line portion corresponding to. The straight line portion on the radially inner side of the connecting piece 45c is substantially parallel to the outer edge 45w of the connecting base portion 45a. *
連結部４５ｋは、径方向に関して、連結ベース部４５ａと、連結片状部４５ｃと、の間の領域に配置される。連結部４５ｋは、一箇所の連結片状部４５ｃの直線部において、連結片状部４５ｃの周方向の両端部よりも内側の二箇所に設けられ、互いが平行に延びる。連結部４５ｋは、連結ベース部４５ａの外縁部４５ｗと、連結片状部４５ｃの直線部と、を連結する。連結部４５ｋは、その平面視形状が、略径方向に延びる長板形状である。　 The connecting portion 45k is arranged in a region between the connecting base portion 45a and the connecting piece-like portion 45c in the radial direction. The connecting portions 45k are provided at two locations on the inner side of both ends of the connecting piece-like portion 45c in the circumferential direction in the straight portion of the connecting piece-like portion 45c at one place, and extend in parallel with each other. The connecting portion 45k connects the outer edge portion 45w of the connecting base portion 45a and the straight portion of the connecting piece-like portion 45c. The connecting portion 45k has a long plate shape in plan view extending in a substantially radial direction. *
＜５－１－２．ロータコアの積層構成＞

　図１８及び図１９に示すロータコア４０は、軸方向の上端及び下部の各々に例えば２枚の第２積層鋼板４２が配置され、軸方向上端の第２積層鋼板４２と、軸方向下部の第２積層鋼板４２と、の間に複数の第１積層鋼板４１が配置される。軸方向に積層される複数の第１積層鋼板４１の中間部にも、例えば２枚の第２積層鋼板４２が配置される。さらに、軸方向の下端に例えば１枚の連結積層鋼板４５が配置される。このとき、第１積層鋼板４１の片状部４１ｃと、第２積層鋼板４２の環状部４２ｃの大径部４２ｆと、連結積層鋼板４５の連結片状部４５ｃと、が軸方向において重なり、外縁部の一部が揃う位置で、第１積層鋼板４１、第２積層鋼板４２及び連結積層鋼板４５が積層される。　 <5-1-2. Laminated structure of rotor core>

In the rotor core 40 shown in FIGS. 18 and 19, for example, two second laminated steel plates 42 are disposed at each of the upper end and the lower portion in the axial direction, the second laminated steel plate 42 at the upper end in the axial direction, and the second laminated steel plate 42 at the lower portion in the axial direction. A plurality of first laminated steel plates 41 are arranged between the laminated steel plates 42. For example, two second laminated steel plates 42 are also arranged in the middle part of the plurality of first laminated steel plates 41 laminated in the axial direction. Furthermore, for example, one connected laminated steel plate 45 is disposed at the lower end in the axial direction. At this time, the piece-like portion 41c of the first laminated steel plate 41, the large-diameter portion 42f of the annular portion 42c of the second laminated steel plate 42, and the connecting piece-like portion 45c of the connected laminated steel plate 45 overlap in the axial direction, and the outer edge The first laminated steel plate 41, the second laminated steel plate 42, and the connected laminated steel plate 45 are laminated at a position where a part of the parts are aligned.
この構成によれば、ロータコア４０の強度をより一層向上させることが可能である。また、貫通部４１ｂ、４２ｂにマグネット３２を挿入した場合、軸方向において、連結部４５ｋにマグネット３２が引っ掛かる。これにより、マグネット３２の、ロータコア４０からの脱落を防止することが可能である。さらに、第１ベース部４１ａと片状部４１ｃとが、また、第２ベース部４２ａと環状部４２ｃとが、ばらばらになることを防止することができる。　 According to this configuration, the strength of the rotor core 40 can be further improved. Further, when the magnet 32 is inserted into the through portions 41b and 42b, the magnet 32 is hooked on the connecting portion 45k in the axial direction. Thereby, it is possible to prevent the magnet 32 from falling off the rotor core 40. Furthermore, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c can be prevented from being separated. *
なお、連結積層鋼板４５は、ロータコア４０の軸方向の上端に配置しても良い。さらに、連結積層鋼板４５は、ロータコア４０の軸方向の下端及び上端の両方に配置しても良い。この構成によれば、ロータコア４０の強度をさらに高めることが可能になる。また、上端の連結積層鋼板４５と、下端の連結積層鋼板４５と、は異なる形状であっても良い。例えば、上端はマグネット３２を挿通する貫通部を有する連結積層鋼板４５であり、下端はマグネット３２の脱落を防止する連結積層鋼板４５であっても良い。　 The connected laminated steel plates 45 may be disposed at the upper end of the rotor core 40 in the axial direction. Further, the connected laminated steel plates 45 may be disposed at both the lower end and the upper end of the rotor core 40 in the axial direction. According to this configuration, the strength of the rotor core 40 can be further increased. Further, the upper end connected laminated steel plates 45 and the lower end connected laminated steel plates 45 may have different shapes. For example, the upper end may be a connected laminated steel plate 45 having a penetrating portion through which the magnet 32 is inserted, and the lower end may be a connected laminated steel plate 45 that prevents the magnet 32 from falling off. *
また、ロータコア４０は、第１積層鋼板４１が凸部４１ｅを有し、第２積層鋼板４２が凸部４２ｅを有し、連結積層鋼板４５が凹部４５ｅを有する。貫通部４１ｂ、４２ｂにマグネット３２を挿入した場合に、凸部４１ｅ、４２ｅにマグネット３２を接触させることができる。これにより、マグネット３２の周方向における位置決めを行うことができる。また、貫通部４１ｂ、４２ｂにマグネット３２を挿入した後、第１ベース部４１ａ等の径方向外側に合成樹脂、接着剤等を流し込むと、凹部４５ｅに合成樹脂、接着剤等が浸入する。これにより、マグネット３２を強固に固定することができる。したがって、マグネット３２の位置決めと、マグネット３２の強固な固定と、の両者を実現することが可能である。　 In the rotor core 40, the first laminated steel plate 41 has a convex portion 41e, the second laminated steel plate 42 has a convex portion 42e, and the connected laminated steel plate 45 has a concave portion 45e. When the magnet 32 is inserted into the through portions 41b and 42b, the magnet 32 can be brought into contact with the convex portions 41e and 42e. Thereby, the positioning of the magnet 32 in the circumferential direction can be performed. Further, after the magnet 32 is inserted into the through portions 41b and 42b, when synthetic resin, adhesive, or the like is poured into the radially outer side of the first base portion 41a, the synthetic resin, adhesive, or the like enters the recess 45e. Thereby, the magnet 32 can be firmly fixed. Therefore, it is possible to realize both positioning of the magnet 32 and firm fixation of the magnet 32. *
＜５－２．第５実施形態のロータコアの第１変形例＞

＜５－２－１．ロータコアの詳細な構成＞

　続いて、第５実施形態のロータコア４０の第１変形例について説明する。図２１は、本発明の第５実施形態に係るロータコアの第１変形例を上から見た斜視図である。図２２は本発明の第５実施形態に係るロータコアの第１変形例を下から見た斜視図である。　 <5-2. First Modified Example of Rotor Core of Fifth Embodiment>

<5-2-1. Detailed configuration of rotor core>

Then, the 1st modification of the rotor core 40 of 5th Embodiment is demonstrated. FIG. 21 is a perspective view of a first modification of the rotor core according to the fifth embodiment of the present invention as seen from above. FIG. 22 is a perspective view of the first modification of the rotor core according to the fifth embodiment of the present invention viewed from below.
第５実施形態のロータコア４０の第１変形例は、図２１及び図２２に示すロータコア４０が、第１積層鋼板４１及び第２積層鋼板４２に加えて、さらに連結積層鋼板４５を有する。連結積層鋼板４５は、ロータコア４０の軸方向の下端に配置される。　 As for the 1st modification of the rotor core 40 of 5th Embodiment, the rotor core 40 shown in FIG.21 and FIG.22 has the connection laminated steel plate 45 further in addition to the 1st laminated steel plate 41 and the 2nd laminated steel plate 42. FIG. The connected laminated steel plate 45 is disposed at the lower end in the axial direction of the rotor core 40. *
図２２に示すように、連結積層鋼板４５は、連結ベース部４５ａと、連結片状部４５ｃと、の間に介在する介在部として、連結部４５ｋを有する。なお、ここで言う介在部には、連結部４５ｋのほか、連結ベース部４５ａに設けた外向き突起部、連結片状部４５ｃに設けた内向き突起部、さらに連結ベース部４５ａと連結片状部４５ｃとの間を鋼板部材で埋めた形態を含む。　 As shown in FIG. 22, the connection laminated steel plate 45 has the connection part 45k as an interposition part interposed between the connection base part 45a and the connection piece-like part 45c. In addition to the connecting portion 45k, the intervening portion referred to here includes an outward projection provided on the connection base portion 45a, an inward projection provided on the connection piece 45c, and a connection base portion 45a and a connection piece shape. It includes a form in which the space between the portion 45c is filled with a steel plate member. *
この構成によれば、貫通部４１ｂ及び貫通部４２ｂに挿入されるマグネット３２は、ロータコア４０の下部において介在部に引っ掛かる。したがって、マグネット３２の、ロータコア４０の下方への脱落を防止することが可能である。さらに、連結ベース部４５ａと、連結片状部４５ｃと、が連結部４５ｋを介して繋がっているので、第１ベース部４１ａと片状部４１ｃとが、また第２ベース部４２ａと環状部４２ｃが、ばらばらになることを防止することができる。　 According to this configuration, the magnet 32 inserted into the through part 41 b and the through part 42 b is caught by the interposition part in the lower part of the rotor core 40. Therefore, it is possible to prevent the magnet 32 from falling off the rotor core 40. Further, since the connecting base portion 45a and the connecting piece-like portion 45c are connected via the connecting portion 45k, the first base portion 41a and the piece-like portion 41c are also connected to the second base portion 42a and the annular portion 42c. However, it is possible to prevent it from falling apart. *
図２１に示すように、ロータコア４０の軸方向の上端に配置された第２積層鋼板４２は、外向き突起部４２ｎを備える。外向き突起部４２ｎは、第２ベース部４２ａの外縁部４２ｗから径方向外側に向かって延びる。外向き突起部４２ｎの突出長さは、貫通部４２ｂの径方向の幅よりも短い。なお、マグネット３２は、ロータコア４０の軸方向上端に配置された第２積層鋼板４２よりも下方の、貫通部４１ｂ及び貫通部４２ｂに挿入される。　 As shown in FIG. 21, the second laminated steel plate 42 disposed at the upper end in the axial direction of the rotor core 40 includes an outward projection 42 n. The outward projecting portion 42n extends radially outward from the outer edge portion 42w of the second base portion 42a. The protruding length of the outward projecting portion 42n is shorter than the radial width of the penetrating portion 42b. The magnet 32 is inserted into the through portion 41 b and the through portion 42 b below the second laminated steel plate 42 disposed at the upper end in the axial direction of the rotor core 40. *
この構成によれば、マグネット３２は、ロータコア４０の上部において外向き突起部４２ｎに引っ掛かる。したがって、マグネット３２の、ロータコア４０の上方への脱落を防止することが可能である。　 According to this configuration, the magnet 32 is caught by the outward projecting portion 42 n at the upper portion of the rotor core 40. Therefore, it is possible to prevent the magnet 32 from falling off the rotor core 40. *
＜５－３．第５実施形態のロータコアの第２変形例＞

＜５－３－１．ロータコアの詳細な構成＞

　続いて、第５実施形態のロータコア４０の第２変形例について説明する。図２３は、本発明の第５実施形態に係るロータコアの第２変形例の製造方法の第１段階を示す縦端面図である。図２４は、本発明の第５実施形態に係るロータコアの第２変形例の製造方法の第２段階を示す縦端面図である。図２５は、本発明の第５実施形態に係るロータコアの第２変形例の製造方法の第３段階を示す縦端面図である。　 <5-3. Second Modified Example of Rotor Core of Fifth Embodiment>

<5-3-1. Detailed configuration of rotor core>

Then, the 2nd modification of the rotor core 40 of 5th Embodiment is demonstrated. FIG. 23 is a longitudinal end view showing a first step in a method for manufacturing a second modification of the rotor core according to the fifth embodiment of the present invention. FIG. 24 is a longitudinal end view showing a second step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention. FIG. 25 is a longitudinal end view showing a third step in the method for manufacturing the second modification of the rotor core according to the fifth embodiment of the present invention.
第５実施形態のロータコア４０の第２変形例は、連結積層鋼板４５が、ロータコア４０の軸方向の上端に配置される。或いは、第５実施形態のロータコア４０の第２変形例は、連結積層鋼板４５が、ロータコア４０の軸方向の上端及び下端の両方に配置される。　 As for the 2nd modification of the rotor core 40 of 5th Embodiment, the connection laminated steel plate 45 is arrange | positioned at the upper end of the axial direction of the rotor core 40. FIG. Or as for the 2nd modification of the rotor core 40 of 5th Embodiment, the connection laminated steel plate 45 is arrange | positioned at both the upper end and lower end of the axial direction of the rotor core 40. FIG. *
図２５に示すように、軸方向上端の連結積層鋼板４５の連結部４５ｋは、積層された連結積層鋼板４５に対して、連結積層鋼板４５の軸方向上側から内側に向かって切断される。切断された連結部４５ｋは、貫通部４５ｂの内側に向かって屈曲される。このように、連結部４５ｋを切断することによって、外向き突起部４５ｎを形成することができる。なお、同様の切断工程により、内向き突起部を形成しても良い。　 As shown in FIG. 25, the connecting portion 45 k of the connecting laminated steel plate 45 at the upper end in the axial direction is cut from the upper side in the axial direction of the connecting laminated steel plate 45 toward the inside with respect to the laminated laminated steel plate 45. The cut connection part 45k is bent toward the inside of the through part 45b. Thus, the outward projecting portion 45n can be formed by cutting the connecting portion 45k. Note that the inward projection may be formed by a similar cutting process. *
＜５－３－２．ロータコアの製造方法＞　 <5-3-2. Manufacturing method of rotor core>
第５実施形態のロータコア４０の第２変形例の製造方法は、分割積層鋼板を軸方向に積層する工程を含む。分割積層鋼板とは、第１ベース部４１ａと、片状部４１ｃと、が径方向において分割された第１積層鋼板４１が相当する。この工程では、複数の第１積層鋼板４１が軸方向に積層される。なお、ロータコア４０は、第１積層鋼板４１よりも積層枚数が少ない複数の第２積層鋼板４２も含む。　 The manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of laminating | stacking a division | segmentation laminated steel plate to an axial direction. The divided laminated steel plate corresponds to the first laminated steel plate 41 in which the first base portion 41a and the piece-like portion 41c are divided in the radial direction. In this step, a plurality of first laminated steel plates 41 are laminated in the axial direction. The rotor core 40 also includes a plurality of second laminated steel plates 42 having a smaller number of laminated sheets than the first laminated steel plates 41. *
次に、第５実施形態のロータコア４０の第２変形例の製造方法は、積層された第１積層鋼板４１に対して、連結積層鋼板４５をさらに積層する工程を含む。この工程では、連結ベース４５ａと連結片状部４５ｃとが連結部４５ｋを介して接続された連結積層鋼板４５を、積層された第１積層鋼板４１の軸方向の上端に積層する。さらに、第５実施形態のロータコア４０の第２変形例の製造方法は、連結ベース部４５ａと連結片状部４５ｃとの間に、介在部である連結部４５ｋが介在する連結積層鋼板４５（介在積層鋼板）を、積層された第１積層鋼板４１の軸方向の下端に積層する。これらの積層工程において、第１積層鋼板４１の片状部４１ｃと、連結積層鋼板４５の連結片状部４５ｃと、が軸方向において重なり、外縁部の一部が揃う位置で、第１積層鋼板４１と連結積層鋼板４５とが積層される。　 Next, the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of further laminating | stacking the connection laminated steel plate 45 with respect to the laminated | stacked 1st laminated steel plate 41. FIG. In this step, the laminated laminated steel plate 45 in which the coupling base 45a and the coupling piece 45c are connected via the coupling portion 45k is laminated on the upper end in the axial direction of the laminated first laminated steel plate 41. Furthermore, the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment is the connection laminated steel plate 45 (interposition) in which the connection part 45k which is an interposition part interposes between the connection base part 45a and the connection piece-like part 45c. (Laminated steel sheet) is laminated on the lower end of the laminated first laminated steel sheet 41 in the axial direction. In these laminating steps, the first laminated steel sheet 41c and the connecting laminated steel sheet 45 are connected to each other in a position where the piece-like portion 41c of the first laminated steel plate 41 and the connecting piece-like portion 45c of the connected laminated steel plate 45 overlap in the axial direction. 41 and the laminated laminated steel plate 45 are laminated. *
次に、第５実施形態のロータコア４０の第２変形例の製造方法は、連結部４５ｋを切断部材２００で切断する工程を含む。この工程では、図２３、図２４、図２５に示す連結積層鋼板４５の貫通部４５ｂ（図示略）に、切断部材２００を挿入することで、連結部４５ｋを切断部材２００で切断する。これにより、連結ベース部４５ａと連結片状部４５ｃとが繋がった状態を解消することができる。したがって、連結ベース部４５ａと連結片状部４５ｃとの間に、空気層等のフラックスバリアを設けることができる。これにより、磁束ループを低減させることが可能である。　 Next, the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of cut | disconnecting the connection part 45k with the cutting member 200. FIG. In this step, the connecting member 45k is cut by the cutting member 200 by inserting the cutting member 200 into the penetrating portion 45b (not shown) of the connected laminated steel plate 45 shown in FIGS. Thereby, the state where the connection base part 45a and the connection piece-like part 45c were connected can be eliminated. Therefore, a flux barrier such as an air layer can be provided between the connection base portion 45a and the connection piece 45c. Thereby, it is possible to reduce a magnetic flux loop. *
図２３に示す切断部材２００は、例えば金属で構成され、マグネット３２と同様の、軸方向と交差する断面形状が矩形状の、軸方向に延びる直方体である。切断部材として、マグネット３２を使用することにしても良い。これにより、使用部材を低減させることができ、ロータ３を形成するまでの工数を削減することができる。さらに、マグネット３２と樹脂が接触しているので、締結強度を向上させることが可能である。図２３に示す連結部４５ｋの切断工程の第１段階では、ロータコア４０の径方向に関して、切断部材２００の径方向外側のエッジ部が、連結部４５ｋの連結片状部４５ｃとの連結部分に一致する位置の、軸方向上方に切断部材２００が配置される。　 The cutting member 200 shown in FIG. 23 is made of, for example, metal, and is a rectangular parallelepiped extending in the axial direction, like the magnet 32, having a rectangular cross-sectional shape that intersects the axial direction. A magnet 32 may be used as the cutting member. Thereby, a member to be used can be reduced and the man-hours until the rotor 3 is formed can be reduced. Furthermore, since the magnet 32 and the resin are in contact with each other, the fastening strength can be improved. In the first stage of the cutting process of the connecting portion 45k shown in FIG. 23, the edge portion on the radially outer side of the cutting member 200 matches the connecting portion with the connecting piece 45c of the connecting portion 45k in the radial direction of the rotor core 40. The cutting member 200 is disposed above the position in the axial direction. *
ここで、ロータコア４０は、貫通部５０を有する。貫通部５０は、互いが軸方向に重なる第１積層鋼板４１の貫通部４１ｂと、第２積層鋼板４２の貫通部４２ｂと、で構成され、軸方向に延びる。　 Here, the rotor core 40 has a through portion 50. The penetrating part 50 includes a penetrating part 41b of the first laminated steel sheet 41 and a penetrating part 42b of the second laminated steel sheet 42 that overlap each other in the axial direction, and extends in the axial direction. *
貫通部５０は、第１貫通部５１と、第２貫通部５２と、を有する。第２貫通部５２は、第１貫通部５１に対して径方向の幅が狭い。第２貫通部５２は、マグネット３２のみを収容可能な径方向の幅を有する。第１貫通部５１は、第２貫通部５２に対して径方向の幅が広い。第１貫通部５１は、マグネット３２に加えて、後述する外向き突起部４５ｎを収容可能な径方向の幅を有する。　 The penetration part 50 includes a first penetration part 51 and a second penetration part 52. The second penetrating part 52 is narrower in the radial direction than the first penetrating part 51. The second penetrating portion 52 has a radial width that can accommodate only the magnet 32. The first penetrating portion 51 is wider in the radial direction than the second penetrating portion 52. The first penetrating portion 51 has a radial width that can accommodate an outward projecting portion 45n described later in addition to the magnet 32. *
第１貫通部５１は、ロータコア４０の上部において、連結積層鋼板４５の下面に隣接して積層される、所定枚数の第１積層鋼板４１の貫通部４１ｂ及び第２積層鋼板４２の貫通部４２ｂとして設けられる。第２貫通部５２は、第１貫通部５１が設けられた第１積層鋼板４１及び第２積層鋼板４２よりも下方の、第１積層鋼板４１の貫通部４１ｂ及び第２積層鋼板４２の貫通部４２ｂとして設けられる。　 The first penetrating portion 51 is formed as a penetrating portion 41b of the predetermined number of first laminated steel plates 41 and a penetrating portion 42b of the second laminated steel plate 42, which are laminated adjacent to the lower surface of the connected laminated steel plates 45 in the upper part of the rotor core 40. Provided. The 2nd penetration part 52 is lower than the 1st lamination steel plate 41 and the 2nd lamination steel plate 42 in which the 1st penetration part 51 was provided, penetration part 41b of the 1st lamination steel plate 41, and penetration part of the 2nd lamination steel plate 42 42b is provided. *
図２４に示す連結部４５ｋの切断工程の第２段階では、切断部材２００が下降し、連結部４５ｋが切断される。連結部４５ｋは、連結片状部４５ｃとの連結部分で切断される。切断された連結部４５ｋは、連結ベース部４５ａの外向き突起部４５ｎとなる。外向き突起部４５ｎは、連結ベース部４５ａの外縁部４５ｗから径方向外側に向かって延びる。外向き突起部４５ｎは、連結ベース部４５ａとの付け根の部分で、第１貫通部５１に向かって屈曲する。　 In the second stage of the cutting process of the connecting portion 45k shown in FIG. 24, the cutting member 200 is lowered and the connecting portion 45k is cut. The connection part 45k is cut | disconnected by a connection part with the connection piece-like part 45c. The cut connection part 45k becomes an outward projection 45n of the connection base part 45a. The outward projection 45n extends radially outward from the outer edge 45w of the connection base portion 45a. The outward projecting portion 45 n is a portion of the base with the connection base portion 45 a and bends toward the first through portion 51. *
図２５に示す連結部４５ｋの切断工程の第３段階では、切断部材２００の下降がさらに進み、外向き突起部４５ｎは、屈曲した一部が、第１貫通部５１の内部に収容される。連結部４５ｋを切断部材２００で切断する工程の後、切断部材２００が、貫通部５０から抜去される。　 In the third stage of the cutting process of the connecting portion 45k shown in FIG. 25, the lowering of the cutting member 200 further proceeds, and the bent part of the outward projection 45n is accommodated inside the first through portion 51. After the step of cutting the connecting portion 45k with the cutting member 200, the cutting member 200 is removed from the through portion 50. *
次に、第５実施形態のロータコア４０の第２変形例の製造方法は、貫通部５０にマグネット３２を挿入する工程を含む。なお、切断部材としてマグネット３２を使用した場合、マグネット３２は、連結部４５ｋを切断した後、引き続き貫通部５０に挿入される。　 Next, the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of inserting the magnet 32 in the penetration part 50. FIG. In addition, when the magnet 32 is used as a cutting member, the magnet 32 is continuously inserted in the penetration part 50, after cut | disconnecting the connection part 45k. *
なお、連結積層鋼板４５がロータコア４０の軸方向の下端に配置された場合、マグネット３２は、貫通部５０への挿入の最終段階において、軸方向下端の連結積層鋼板４５の、介在部である連結部４５ｋの上面に接触される。　 When the laminated laminated steel plate 45 is disposed at the lower end in the axial direction of the rotor core 40, the magnet 32 is a connecting portion that is an interposed portion of the laminated laminated steel plate 45 at the lower end in the axial direction at the final stage of insertion into the through portion 50. The upper surface of the part 45k is contacted. *
次に、第５実施形態のロータコア４０の第２変形例の製造方法は、樹脂部３４を形成する工程を含む。この工程では、樹脂部３４が、空間部３３に合成樹脂、接着剤等を流し込んで設けられる。　 Next, the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment includes the process of forming the resin part 34. FIG. In this step, the resin portion 34 is provided by pouring synthetic resin, adhesive, or the like into the space portion 33. *
第５実施形態の第２変形例のロータコア４０は、軸方向の上端に配置された連結積層鋼板４５が、連結ベース部４５ａの外縁部４５ｗから径方向外側に向かって延びる外向き突起部４５ｎを有する。この構成によれば、連結積層鋼板４５の、連結ベース部４５ａと連結片状部４５ｃとの間に、空気層または樹脂層３４等のフラックスバリアを設けることができる。これにより、マグネット３２の磁束をより有効活用することが可能である。また、外向き突起部４５ｎを形成する前、すなわち連結部４５ｋを切断する前は、第１ベース部４１ａと片状部４１ｃとが、また第２ベース部４２ａと環状部４２ｃが、ばらばらになることを防止することができる。　 In the rotor core 40 according to the second modification of the fifth embodiment, the connection laminated steel plate 45 arranged at the upper end in the axial direction has an outward projection 45n extending radially outward from the outer edge 45w of the connection base portion 45a. Have. According to this configuration, a flux barrier such as an air layer or a resin layer 34 can be provided between the connection base portion 45 a and the connection piece 45 c of the connection laminated steel plate 45. Thereby, the magnetic flux of the magnet 32 can be used more effectively. Further, before forming the outward projecting portion 45n, that is, before cutting the connecting portion 45k, the first base portion 41a and the piece-like portion 41c, and the second base portion 42a and the annular portion 42c are separated. This can be prevented. *
なお、ロータコア４０は、外向き突起部４５ｎに代えて、連結片状部４５ｃの内縁部から径方向内側に向かって延びる内向き突起部が設けられることにしても良い。また、ロータコア４０は、外向き突起部４５ｎと、内向き突起部と、の両方が設けられることにしても良い。　 Note that the rotor core 40 may be provided with inward protrusions extending radially inward from the inner edge of the connecting piece 45c instead of the outward protrusion 45n. Further, the rotor core 40 may be provided with both the outward projection 45n and the inward projection. *
外向き突起部４５ｎは、貫通部５０に向かって屈曲するので、その弾性力で、マグネット３２を径方向外側に向かって圧す。これにより、マグネット３２の径方向における位置決めを行うことができる。さらに、マグネット３２をロータコア４０に固定する作用を高めることが可能である。なお、第１変形例における内向き突起部と、第２変形例における外向き突起部４５ｎと、を組み合わせても良い。この場合、外向き突起部４５ｎが径方向外側に向かって押されるため、内向き突起部に引っかかって脱落を防止することができる。　 Since the outward projecting portion 45n bends toward the penetrating portion 50, the elastic force presses the magnet 32 outward in the radial direction. Thereby, positioning in the radial direction of the magnet 32 can be performed. Furthermore, the action of fixing the magnet 32 to the rotor core 40 can be enhanced. In addition, you may combine the inward projection part in a 1st modification, and the outward projection part 45n in a 2nd modification. In this case, since the outward projection 45n is pushed outward in the radial direction, it can be caught by the inward projection and prevented from falling off. *
外向き突起部４５ｎは、屈曲した一部が、第１貫通部５１の内部に収容されるので、貫通部５０へのマグネット３２の挿入の邪魔にならない。したがって、貫通部５０において、マグネット３２を挿入するためのスペースを確保することができる。　 A part of the outward projecting portion 45n that is bent is accommodated inside the first through portion 51, so that the insertion of the magnet 32 into the through portion 50 is not obstructed. Therefore, a space for inserting the magnet 32 can be secured in the through portion 50. *
なお、第５実施形態のロータコア４０の第２変形例の製造方法において、連結部４５ｋを切断部材２００で切断する工程の前に、連結部４５ｋの軸方向の厚さを連結ベース部４５ａ及び連結片状部４５ｃよりも薄くする工程を含むことにしても良い。この構成によれば、連結部４５ｋを容易に切断することができる。例えば、プレス加工を行うことにしても良い。この構成によれば、連結部４５ｋを容易に切断することが可能な形態を、簡便な加工方法で得ることができる。　 In addition, in the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment, before the process of cut | disconnecting the connection part 45k with the cutting member 200, the thickness of the axial direction of the connection part 45k is connected to the connection base part 45a and connection. You may decide to include the process made thinner than the piece-like part 45c. According to this configuration, the connecting portion 45k can be easily cut. For example, press working may be performed. According to this structure, the form which can cut | disconnect the connection part 45k easily can be obtained with a simple processing method. *
また、第５実施形態のロータコア４０の第２変形例の製造方法において、連結部４５ｋを切断部材２００で切断する工程の前に、連結部４５ｋに切り欠きを設ける工程を含むことにしても良い。この構成によれば、連結部４５ｋを容易に切断することができる。例えば、プッシュバック加工を行うことにしても良い。この構成によれば、連結部４５ｋを容易に切断することが可能な形態を、簡便な加工方法で得ることができる。　 Moreover, in the manufacturing method of the 2nd modification of the rotor core 40 of 5th Embodiment, you may decide to include the process of providing a notch in the connection part 45k before the process of cut | disconnecting the connection part 45k with the cutting member 200. FIG. . According to this configuration, the connecting portion 45k can be easily cut. For example, push back processing may be performed. According to this structure, the form which can cut | disconnect the connection part 45k easily can be obtained with a simple processing method. *
＜６．第６実施形態＞

＜６－１．ロータコアの詳細な構成＞

　次に、本発明の例示的な第６実施形態のモータについて説明する。図２６は、本発明の第６実施形態に係るモータのロータコアを上から見た斜視図である。図２７は、本発明の第６実施形態に係るモータのロータコアを下から見た斜視図である。図２８は、本発明の第６実施形態に係るロータコアの第１積層鋼板の平面図である。図２９は、本発明の第６実施形態に係るロータコアの第２積層鋼板の平面図である。なお、この実施形態の基本的な構成は先に説明した第１実施形態と同じであるので、第１実施形態と共通する構成要素には前と同じ符号または同じ名称を付してその説明を省略する場合がある。　 <6. Sixth Embodiment>

<6-1. Detailed configuration of rotor core>

Next, a motor according to a sixth exemplary embodiment of the present invention will be described. FIG. 26 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from above. FIG. 27 is a perspective view of the rotor core of the motor according to the sixth embodiment of the present invention as seen from below. FIG. 28 is a plan view of the first laminated steel sheet of the rotor core according to the sixth embodiment of the present invention. FIG. 29 is a plan view of a second laminated steel plate of the rotor core according to the sixth embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first embodiment described above, the same reference numerals or the same names as those in the first embodiment are assigned to the same constituent elements as those of the first embodiment, and the description thereof is omitted. May be omitted.
図２６及び図２７に示すロータコア４０は、第１積層鋼板４６と、第２積層鋼板４７と、を有する。第１積層鋼板４６及び第２積層鋼板４７は各々、ロータコア４０の中心軸に対して径方向に拡がる。　 The rotor core 40 shown in FIGS. 26 and 27 includes a first laminated steel plate 46 and a second laminated steel plate 47. The first laminated steel plate 46 and the second laminated steel plate 47 each expand in the radial direction with respect to the central axis of the rotor core 40. *
＜６－１－１．第１積層鋼板の構成＞　図２８に示す第１積層鋼板４６は、第１ベース部４６ａと、貫通部４６ｂと、片状部４６ｃと、を有する。第１ベース部４６ａは、孔部４６ｄと、凹部４６ｅと、を有する。　 <6-1-1. Configuration of First Laminated Steel Plate> A first laminated steel plate 46 shown in FIG. 28 has a first base portion 46a, a through portion 46b, and a piece-like portion 46c. The first base portion 46a has a hole 46d and a recess 46e. *
＜６－１－２．第２積層鋼板の構成＞

　図２９に示す第２積層鋼板４７は、第２ベース部４７ａと、貫通部４７ｂと、環状部４７ｃと、を有する。第２ベース部４７ａは、孔部４７ｄと、凹部４７ｅと、を有する。環状部４７ｃは、外径が異なる大径部４７ｆ及び小径部４７ｇを有する。　 <6-1-2. Configuration of second laminated steel plate>

The second laminated steel plate 47 shown in FIG. 29 has a second base portion 47a, a penetrating portion 47b, and an annular portion 47c. The second base part 47a has a hole 47d and a recess 47e. The annular portion 47c has a large diameter portion 47f and a small diameter portion 47g having different outer diameters.
＜６－１－３．ロータコアの積層構成＞

　図２６及び図２７に示すロータコア４０は、上記構成の複数の第１積層鋼板４６と、上記構成の少なくとも１枚の第２積層鋼板４７と、が軸方向に積層されて構成される。このとき、第１積層鋼板４６の片状部４６ｃと、第２積層鋼板４７の環状部４７ｃの大径部４７ｆと、が軸方向において重なり、外周縁の一部が揃う位置で、第１積層鋼板４６と第２積層鋼板４７とが積層される。　 <6-1-3. Laminated structure of rotor core>

The rotor core 40 shown in FIGS. 26 and 27 is configured by laminating a plurality of first laminated steel plates 46 having the above configuration and at least one second laminated steel plate 47 having the above configuration in the axial direction. At this time, the first laminated steel sheet 46c and the large-diameter part 47f of the annular portion 47c of the second laminated steel sheet 47 overlap in the axial direction, and the first laminated steel sheet 46 is located at a position where a part of the outer peripheral edge is aligned. A steel plate 46 and a second laminated steel plate 47 are laminated.
この構成によれば、第１積層鋼板４６の第１ベース部４６ａと片状部４６ｃとの間、及び第２積層鋼板４７の第２ベース部４７ａと環状部４７ｃとの間の、周方向の全域にわたって、鋼板の領域が存在しない。これにより、第１ベース部４６ａと片状部４６ｃとの間、及び第２ベース部４７ａと環状部４７ｃとの間に、空気層等のフラックスバリアを設けることができる。したがって、マグネット３２の磁束をより有効活用することが可能である。　 According to this structure, the circumferential direction between the 1st base part 46a of the 1st laminated steel plate 46 and the piece-like part 46c, and the 2nd base part 47a of the 2nd laminated steel plate 47 and the cyclic | annular part 47c is provided. There is no area of the steel plate over the entire area. Thereby, a flux barrier such as an air layer can be provided between the first base portion 46a and the piece-like portion 46c and between the second base portion 47a and the annular portion 47c. Therefore, the magnetic flux of the magnet 32 can be used more effectively. *
また、第２積層鋼板４７の枚数が第１積層鋼板４６の枚数よりも少ないので、ロータコア４０のすべてを第２積層鋼板４７で構成した場合と比較して、ロータコア４０全体における環状部４７ｃを流れる磁束の量を抑制することができる。したがって、環状部４７ｃにおける磁気飽和の発生が抑制され、マグネット３２の磁束をより有効活用することが可能である。　 In addition, since the number of the second laminated steel plates 47 is smaller than the number of the first laminated steel plates 46, the whole of the rotor core 40 flows through the annular portion 47 c in the entire rotor core 40 as compared with the case where the second laminated steel plates 47 are configured. The amount of magnetic flux can be suppressed. Therefore, the occurrence of magnetic saturation in the annular portion 47c is suppressed, and the magnetic flux of the magnet 32 can be used more effectively. *

　貫通部４６ｂ、４７ｂにマグネット３２を挿入した後、第１ベース部４６ａ及び第２ベース部４７ａの径方向外側に合成樹脂、接着剤等を流し込むと、凹部４６ｅ、４７ｅに合成樹脂、接着剤等が浸入する。これにより、片状部４６ｃ、環状部４７ｃ及びマグネット３２を強固に固定することができる。
After the magnet 32 is inserted into the through portions 46b and 47b, when synthetic resin, adhesive, or the like is poured into the radially outer sides of the first base portion 46a and the second base portion 47a, the synthetic resin, adhesive, or the like is inserted into the recesses 46e, 47e. Invades. Thereby, the piece-like part 46c, the annular part 47c, and the magnet 32 can be firmly fixed.
＜７．第７実施形態＞

＜７－１．ロータの詳細な構成＞

　次に、本発明の例示的な第７実施形態のモータについて説明する。図３０は、本発明の第７実施形態に係るモータのロータを上から見た斜視図である。図３１は、本発明の第７実施形態に係るモータのロータの平面図である。なお、この実施形態の基本的な構成は先に説明した第１実施形態と同じであるので、第１実施形態と共通する構成要素には前と同じ符号または同じ名称を付してその説明を省略する場合がある。　 <7. Seventh Embodiment>

<7-1. Detailed configuration of rotor>

Next, a motor according to a seventh exemplary embodiment of the present invention will be described. FIG. 30 is a top perspective view of the rotor of the motor according to the seventh embodiment of the present invention. FIG. 31 is a plan view of a rotor of a motor according to a seventh embodiment of the present invention. Since the basic configuration of this embodiment is the same as that of the first embodiment described above, the same reference numerals or the same names as those in the first embodiment are assigned to the same constituent elements as those of the first embodiment, and the description thereof is omitted. May be omitted.
図３０及び図３１に示すロータ３は、軸方向に延びる円筒形状である。ロータ３は、ステータ２（図１参照）の径方向内側に所定の隙間を設けて配置される。ロータ３は、シャフト３１（図示略）と、ロータコア４０と、マグネット３２と、空間部３３若しくは、樹脂部３４と、を有する。　 The rotor 3 shown in FIGS. 30 and 31 has a cylindrical shape extending in the axial direction. The rotor 3 is arranged with a predetermined gap inside the stator 2 (see FIG. 1) in the radial direction. The rotor 3 includes a shaft 31 (not shown), a rotor core 40, a magnet 32, and a space portion 33 or a resin portion 34. *
樹脂部３４は、空間部３３に合成樹脂、接着剤等を流し込んで設けられる。これにより、樹脂部３４がフラックスバリアとしての役割を果たす。また、マグネット３２の周方向両端が樹脂部３４に接触するので、マグネット３２をロータコア４０に対して強固に固定することが可能である。　 The resin portion 34 is provided by pouring synthetic resin, adhesive, or the like into the space portion 33. Thereby, the resin part 34 plays a role as a flux barrier. Further, since both circumferential ends of the magnet 32 are in contact with the resin portion 34, the magnet 32 can be firmly fixed to the rotor core 40. *
ロータコア４０は、第１積層鋼板４６を有する。第１積層鋼板４６は、第１ベース部４６ａと、貫通部４６ｂと、片状部４６ｃと、を有する。第１ベース部４６ａは、孔部４６ｄと、凹部４６ｅと、を有する。　 The rotor core 40 has a first laminated steel plate 46. The 1st laminated steel plate 46 has the 1st base part 46a, the penetration part 46b, and the piece-like part 46c. The first base portion 46a has a hole 46d and a recess 46e. *
貫通部４６ｂは、第１ベース部４６ａと、片状部４６ｃと、の間の隙間として構成される。８箇所の貫通部４６ｂ各々に、１個ずつマグネット３２が設けられる。８箇所の柱部３３ａが、周方向に隣り合う貫通部４６ｂ（マグネット３２）同士の間に配置され、ロータコア４０を軸方向に貫通する。　 The through portion 46b is configured as a gap between the first base portion 46a and the piece-like portion 46c. One magnet 32 is provided in each of the eight through portions 46b. Eight column portions 33a are disposed between the through portions 46b (magnets 32) adjacent to each other in the circumferential direction, and penetrate the rotor core 40 in the axial direction. *
図３１に示す片状部４６ｃの周方向の長さＬ１が、マグネット３２の周方向の長さＬ２よりも短い。この構成によれば、コギングトルクに係る磁気特性を改善することができる。したがって、コギングトルクを低減させることが可能である。さらに、ロータコア４０の内部における磁束ループの発生を抑制することが可能である。　 The circumferential length L1 of the piece-like portion 46c shown in FIG. 31 is shorter than the circumferential length L2 of the magnet 32. According to this configuration, the magnetic characteristics related to the cogging torque can be improved. Therefore, the cogging torque can be reduced. Furthermore, the occurrence of a magnetic flux loop in the rotor core 40 can be suppressed. *
凹部４６ｅは、中心軸に対する、周方向に隣り合う片状部４６ｃ同士の間の角度領域において設けられる。凹部４６ｅは、第１ベース部４６ａの外縁部４６ｗから径方向内側に向かって凹む。この構成によれば、第１ベース部４６ａと片状部４６ｃとの間、すなわち貫通部４６ｂにマグネット３２を挿入した後、第１ベース部４６ａの径方向外側に合成樹脂、接着剤等を流し込むと、凹部４６ｅに合成樹脂、接着剤等が浸入する。これにより、片状部４６ｃ及びマグネット３２を強固に固定することができる。　 The recess 46e is provided in an angular region between the pieces 46c adjacent to each other in the circumferential direction with respect to the central axis. The recess 46e is recessed radially inward from the outer edge 46w of the first base portion 46a. According to this configuration, after the magnet 32 is inserted between the first base portion 46a and the piece-like portion 46c, that is, the through portion 46b, the synthetic resin, the adhesive, or the like is poured into the radially outer side of the first base portion 46a. Then, a synthetic resin, an adhesive, or the like enters the recess 46e. Thereby, the piece-like part 46c and the magnet 32 can be firmly fixed. *
＜８．その他＞

　以上、本発明の実施形態につき説明したが、本発明の範囲はこれに限定されるものではなく、発明の主旨を逸脱しない範囲で種々の変更を加えて実施することができる。また、上記実施形態やその変形例は適宜任意に組み合わせることができる。　 <8. Other>

Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention. Moreover, the said embodiment and its modification can be combined arbitrarily arbitrarily.
例えば、上記実施形態で説明した環状部４２ｃ、４７ｃ及び連結環状部４３ｃは、円周全体にわたって環状に繋がった形状であるが、周方向の一部が、局部的に途切れた形状であっても良い。　 For example, the annular portions 42c and 47c and the connecting annular portion 43c described in the above embodiment are in a shape that is annularly connected over the entire circumference, but even if a portion of the circumferential direction is locally interrupted. good. *

　また、第２、第３、第４の実施形態では、連結積層鋼板を軸方向の下端のみに配置したが、連結積層鋼板を軸方向の下端と上端との両方に配置しても良い。連結積層鋼板を軸方向の下端と上端との両方に配置する場合、軸方向の下端及び上端の各々に、異なる形状である連結積層鋼板を配置しても良い。
Moreover, in 2nd, 3rd, 4th embodiment, although the connection laminated steel plate was arrange | positioned only at the lower end of an axial direction, you may arrange | position a connection lamination steel plate in both the lower end and upper end of an axial direction. When arrange | positioning a connection laminated steel plate to both the lower end and upper end of an axial direction, you may arrange | position the connection laminated steel plate which is a different shape to each of the lower end and upper end of an axial direction.
また、本発明の実施形態に係るステータとして、クローポール型などのステータにおいても適用することが可能である。　 Further, the present invention can also be applied to a claw pole type stator or the like as the stator according to the embodiment of the present invention. *
また、第１積層鋼板、第２積層鋼板、および連結積層鋼板は、カシメ等により形成された軸方向に突出するカシメ部を有してもよい。　 Moreover, the 1st laminated steel plate, the 2nd laminated steel plate, and a connection laminated steel plate may have the crimping part which protrudes in the axial direction formed of caulking etc. *
図３２は第１積層鋼板の平面図である。図３３は、後述する第１カシメ部の断面図である。図３２および図３３に示すように、第１積層鋼板３４１において、各片状部３４１ｃには第１カシメ部３４１ｐが形成されている。第１カシメ部３４１ｐは、軸方向一方側に突出する第１凸部３４１ｐ１と、第１凸部の軸方向他方側に位置する第１凹部３４１ｐ２と、を有する。本実施形態では、第１カシメ部３４１ｐは、片状部３４１ｃの径方向および周方向における略中央に位置する。すなわち、第１凸部３４１ｐ１および第２凹部３４１ｐ２は、片状部３４１ｃの径方向および周方向における略中央に位置する。　 FIG. 32 is a plan view of the first laminated steel sheet. FIG. 33 is a cross-sectional view of a first caulking portion to be described later. As shown in FIGS. 32 and 33, in the first laminated steel plate 341, each piece-like portion 341c is formed with a first caulking portion 341p. The first caulking portion 341p includes a first convex portion 341p1 that protrudes to one side in the axial direction and a first concave portion 341p2 that is located on the other side in the axial direction of the first convex portion. In the present embodiment, the first caulking portion 341p is located substantially at the center in the radial direction and the circumferential direction of the piece-like portion 341c. That is, the 1st convex part 341p1 and the 2nd recessed part 341p2 are located in the approximate center in the radial direction of the piece-shaped part 341c, and the circumferential direction. *
図３４は第２積層鋼板の平面図である。図３５は、後述する第２カシメ部の断面図である。図３４および図３５に示すように、第２積層鋼板３４２において、各大径部３４２ｃには、第２カシメ部３４２ｐが形成される。第２カシメ部３４２ｐは、軸方向一方側に突出する第２凸部３４２ｐと、第２凸部３４２ｐの軸方向他方側に位置する第２凹部３４２ｐ２と、を有する。本実施形態では、第２カシメ部３４２ｐは、大径部３４２ｃの径方向および周方向における略中央に配置される。すなわち、第２凸部３４２ｐ１および第２凹部３４２ｐ２は、大径部３４２ｃの径方向および周方向における略中央に配置される。　 FIG. 34 is a plan view of the second laminated steel sheet. FIG. 35 is a cross-sectional view of a second caulking portion to be described later. As shown in FIGS. 34 and 35, in the second laminated steel plate 342, a second crimping portion 342p is formed in each large diameter portion 342c. The second caulking portion 342p includes a second convex portion 342p that protrudes on one side in the axial direction and a second concave portion 342p2 that is located on the other side in the axial direction of the second convex portion 342p. In the present embodiment, the second caulking portion 342p is disposed approximately at the center in the radial direction and the circumferential direction of the large diameter portion 342c. That is, the 2nd convex part 342p1 and the 2nd recessed part 342p2 are arrange | positioned in the approximate center in the radial direction and circumferential direction of the large diameter part 342c. *
図３６は連結積層鋼板の平面図である。図３７は、後述する連結カシメ部の断面図である。図３６および図３７に示すように、連結積層鋼板３４５において、各大径部３４５ｃには、連結カシメ部３４５ｐが形成される。連結カシメ部３４５ｐは、軸方向一方側に突出する連結凸部３４５ｐ１と、連結凸部３４５ｐ１の軸方向他方側に位置する連結凹部３４５ｐ２と、を有する。本実施形態では、連結カシメ部３４５ｐは、大径部３４５ｃの径方向および周方向における略中央に配置される。すなわち、連結凸部３４５ｐ１および連結凹部３４５ｐ２は、大径部３４５ｃの径方向および周方向における略中央に配置される。　 FIG. 36 is a plan view of a connected laminated steel sheet. FIG. 37 is a cross-sectional view of a connecting caulking portion to be described later. As shown in FIG. 36 and FIG. 37, in the laminated laminated steel plate 345, each large-diameter portion 345c is formed with a connected crimping portion 345p. The connection crimping part 345p has a connection convex part 345p1 protruding to one side in the axial direction and a connection concave part 345p2 located on the other side in the axial direction of the connection convex part 345p1. In this embodiment, the connection crimping part 345p is arrange | positioned in the approximate center in the radial direction and circumferential direction of the large diameter part 345c. That is, the connection convex part 345p1 and the connection recessed part 345p2 are arrange | positioned in the approximate center in the radial direction and circumferential direction of the large diameter part 345c. *
第１積層鋼板３４１が第２積層鋼板３４２と重ねられたとき、第１カシメ部３４１ｐの周方向および径方向の位置は、第２カシメ部３４２ｐの周方向および径方向の位置と、略同一である。第１カシメ部３４１ｐは、第２カシメ部３４２ｐと軸方向に重なる。より詳細には、第１カシメ部３４１ｐの第１凸部３４１ｐ１は、第２カシメ部の第２凹部３４２ｐ２にはまり込む。または、第１カシメ部３４１ｐの第１凹部３４１ｐ２には、第２カシメ部３４２の第２凸部３４２ｐ１がはまり込む。これにより、第１積層鋼板３４１と第２積層鋼板３４２とを強固に固定することができる。　 When the first laminated steel plate 341 is overlapped with the second laminated steel plate 342, the circumferential direction and radial position of the first crimping portion 341p are substantially the same as the circumferential direction and radial position of the second crimping portion 342p. is there. The first caulking portion 341p overlaps the second caulking portion 342p in the axial direction. More specifically, the first convex portion 341p1 of the first caulking portion 341p fits into the second concave portion 342p2 of the second caulking portion. Alternatively, the second convex portion 342p1 of the second caulking portion 342 is fitted into the first concave portion 341p2 of the first caulking portion 341p. Thereby, the 1st laminated steel plate 341 and the 2nd laminated steel plate 342 can be firmly fixed. *
また、複数の第１積層鋼板３４１が軸方向に積層されたときに、軸方向に隣り合う第１積層鋼板３４１の第１カシメ部３４１ｐ同士は、軸方向に重なる。すなわち、軸方向一方側に位置する第１積層鋼板３４１の第１凹部３４１ｐ２に、軸方向他方側に位置する第１積層鋼板３４１の第１凸部３４１ｐ１がはまり込む。これにより、隣り合う第１積層鋼板３４１同士を強固に固定することができる。　 Moreover, when the several 1st laminated steel plate 341 is laminated | stacked on the axial direction, the 1st crimping part 341p of the 1st laminated steel plate 341 adjacent to an axial direction overlaps with an axial direction. That is, the first convex portion 341p1 of the first laminated steel plate 341 located on the other axial side is fitted into the first concave portion 341p2 of the first laminated steel plate 341 located on the one axial side. Thereby, adjacent 1st laminated steel plates 341 can be firmly fixed. *
さらに、複数の第２積層鋼板３４２同士が積層されたときに、軸方向に隣り合う第２積層鋼板３４２の第２カシメ部３４２ｐ同士は、軸方向にそれぞれ重なる。すなわち、軸方向一方側に位置する第２積層鋼板３４２の第２凹部３４２ｐ２に、軸方向他方側に位置する第２凸部３４２ｐ１がはまり込む。これにより、複数の第２積層鋼板３４２同士を強固に固定することができる。　 Furthermore, when a plurality of second laminated steel plates 342 are laminated, the second caulking portions 342p of the second laminated steel plates 342 adjacent in the axial direction overlap with each other in the axial direction. That is, the second convex portion 342p1 located on the other axial side is fitted into the second concave portion 342p2 of the second laminated steel plate 342 located on the one axial side. Thereby, several 2nd laminated steel plates 342 can be firmly fixed. *
連結積層鋼板が第１積層鋼板３４１と重ねられたとき、連結カシメ部３４５ｐの周方向および径方向の位置は、第１カシメ部の周方向および径方向の位置と、略同一である。連結カシメ部３４５ｐは、第１カシメ部３４１ｐと軸方向に重なる。より詳細には、連結カシメ部３４５ｐの連結凸部は、第１カシメ部３４１ｐの第１凹部３４１ｐ２にはまり込む。または、連結カシメ部３４５ｐの連結凹部３４５ｐ２には、第１カシメ部３４１の第１凸部３４１ｐ１がはまり込む。これにより、連結積層鋼板３４５を第１積層鋼板３４１と強固に固定することができる。　 When the coupled laminated steel plates are overlapped with the first laminated steel plate 341, the circumferential and radial positions of the coupled caulking portion 345p are substantially the same as the circumferential and radial positions of the first caulking portion. The connecting caulking portion 345p overlaps the first caulking portion 341p in the axial direction. In more detail, the connection convex part of the connection crimping part 345p fits into the 1st recessed part 341p2 of the 1st crimping part 341p. Alternatively, the first convex portion 341p1 of the first caulking portion 341 is fitted into the connecting concave portion 345p2 of the connecting caulking portion 345p. Thereby, the connection laminated steel plate 345 can be firmly fixed to the first laminated steel plate 341. *
連結積層鋼板３４５が第２積層鋼板３４２と重ねられたとき、連結カシメ部３４５ｐの周方向および径方向の位置は、第２カシメ部３４２ｐの周方向および径方向の位置と、略同一である。連結カシメ部３４５ｐは、第２カシメ部３４２ｐと軸方向に重なる。より詳細には、連結カシメ部３４５ｐの連結凸部３４５ｐ１は、第２カシメ部３４２ｐの第２凹部３４２ｐ２にはまり込む。または、連結カシメ部３４５ｐの連結凹部３４５ｐ２には、第２カシメ部３４２の第２凸部３４２ｐ１がはまり込む。これにより、連結積層鋼板３４５を第２積層鋼板３４２と強固に固定することができる。　 When the coupled laminated steel plates 345 are overlapped with the second laminated steel plates 342, the circumferential and radial positions of the coupled crimping portion 345p are substantially the same as the circumferential and radial positions of the second crimping portion 342p. The connecting caulking portion 345p overlaps the second caulking portion 342p in the axial direction. More specifically, the connecting convex portion 345p1 of the connecting caulking portion 345p fits into the second concave portion 342p2 of the second caulking portion 342p. Or the 2nd convex part 342p1 of the 2nd crimping part 342 fits in the connection recessed part 345p2 of the coupling crimping part 345p. Thereby, the connection laminated steel plate 345 can be firmly fixed to the second laminated steel plate 342. *
連結積層鋼板３４５同士が軸方向に積層されたとき、軸方向に隣り合う連結積層鋼板３４５の連結カシメ部３４５ｐ同士は、軸方向にそれぞれ重なる。すなわち、軸方向一方側に位置する連結積層鋼板３４５の連結凹部３４５ｐ２に、軸方向他方側に位置する連結凸部３４５ｐ１がはまり込む。これにより、複数の連結積層鋼板３４５同士を強固に固定することができる。　 When the connection laminated steel plates 345 are laminated in the axial direction, the connection crimping portions 345p of the connection lamination steel plates 345 adjacent in the axial direction overlap each other in the axial direction. That is, the connecting convex portion 345p1 located on the other axial side is fitted into the connecting concave portion 345p2 of the laminated laminated steel plate 345 located on the one axial side. Thereby, the some connection laminated steel plates 345 can be firmly fixed. *
なお、第１カシメ部３４１ｐ、第２カシメ部３４２ｐ、連結カシメ部３４５ｐを形成する際には、第１積層鋼板３４１、第２積層鋼板３４２および連結積層鋼板３４５の一部を、それぞれカシメる。本実施形態では、軸方向から見たときに、第１カシメ部３４１ｐ、第２カシメ部３４２ｐおよび連結カシメ部３４５ｐの外形は、例えば、周方向を長手方向とする楕円形状または矩形である。すなわち、片状部３４１ｃおよび大径部３４２ｃが周方向を長手方向として延びる形状を有する。そのため、第１カシメ部３４１ｐ、第２カシメ部３４２ｐおよび連結カシメ部３４５ｐの外形を周方向を長手方向とする形状とすることにより、各片状部３４１ｃおよび大径部３４２ｃにおいて、カシメの数が１つのみであったとしても、第１積層鋼板３４１同士、第２積層鋼板３４２同士、第１積層鋼板３４１および第２積層鋼板３４２、連結積層鋼板３４５と第１積層鋼板３４１、連結積層鋼板３４５と第２積層鋼板３４２、または、連結積層鋼板３４５同士を、それぞれ、強固に固定することができる。　 In addition, when forming the 1st crimping part 341p, the 2nd crimping part 342p, and the connection crimping part 345p, a part of the 1st laminated steel plate 341, the 2nd laminated steel sheet 342, and the coupling laminated steel plate 345 is each crimped. In this embodiment, when viewed from the axial direction, the outer shape of the first caulking part 341p, the second caulking part 342p, and the connecting caulking part 345p is, for example, an oval shape or a rectangle with the circumferential direction as the longitudinal direction. That is, the piece-like portion 341c and the large-diameter portion 342c have a shape extending with the circumferential direction as the longitudinal direction. Therefore, by forming the outer shape of the first caulking portion 341p, the second caulking portion 342p, and the connecting caulking portion 345p into a shape in which the circumferential direction is the longitudinal direction, the number of caulking in each piece-like portion 341c and the large diameter portion 342c is increased. Even if there is only one, the first laminated steel sheets 341, the second laminated steel sheets 342, the first laminated steel sheets 341 and the second laminated steel sheets 342, the connected laminated steel sheets 345, the first laminated steel sheets 341, and the connected laminated steel sheets 345 And the second laminated steel plate 342 or the connected laminated steel plates 345 can be firmly fixed. *
図３８は、ロータコア４０の断面図である。図３９は、貫通部を含むロータコアの部分断面図である。図３８および図３９に示すように、本実施形態では、１枚以上の連結積層鋼板３４５の上（軸方向一端側）に、１枚以上の第２積層鋼板３４２を重ねられる。当該第２積層鋼板３４２の上に、複数の第１積層鋼板３４１が積層される。積層された第１積層鋼板３４１の上に、１枚以上の第２積層鋼板３４２が積層される。同様に、当該第２積層鋼板３４２の上に、複数の第１積層鋼板３４１が積層される。当該積層された第１積層鋼板３４１の上に、さらに１枚以上の第２積層鋼板３４２が積層される。すなわち、本実施形態のロータコアでは、第２積層鋼板３４２と当該第２積層鋼板３４２により挟まれた複数枚の第１積層鋼板３４１との組が、軸方向に複数積層されている。第２積層鋼板によって軸方向に挟まれる第１積層鋼板３４１の枚数は、例えば、３枚～１０枚程度である。また、第１積層鋼板３４１および第２積層鋼板の板厚は、例えば、０．５～１．５ｍｍ程度である。　 FIG. 38 is a cross-sectional view of the rotor core 40. FIG. 39 is a partial cross-sectional view of a rotor core including a through portion. As shown in FIGS. 38 and 39, in this embodiment, one or more second laminated steel plates 342 are stacked on one or more connected laminated steel plates 345 (one axial end side). On the second laminated steel plate 342, a plurality of first laminated steel plates 341 are laminated. One or more second laminated steel plates 342 are laminated on the laminated first laminated steel plates 341. Similarly, a plurality of first laminated steel plates 341 are laminated on the second laminated steel plate 342. One or more second laminated steel sheets 342 are further laminated on the laminated first laminated steel sheets 341. That is, in the rotor core of the present embodiment, a plurality of sets of the second laminated steel plates 342 and a plurality of first laminated steel plates 341 sandwiched between the second laminated steel plates 342 are laminated in the axial direction. The number of first laminated steel sheets 341 sandwiched between the second laminated steel sheets in the axial direction is, for example, about 3 to 10. Further, the thickness of the first laminated steel sheet 341 and the second laminated steel sheet is, for example, about 0.5 to 1.5 mm. *
ロータコアが上記構造を有することにより、第１積層鋼板３４１を軸方向に複数積層した場合であっても、磁気特性を低下させることなく、片状部３４１ｃが径方向に向かって倒れることを抑制することができる。なお、軸方向他端側に配置される連結積層鋼板３４５は、連結カシメ部３４５ｐを有さなくてもよい。　 Since the rotor core has the above-described structure, even if a plurality of first laminated steel plates 341 are laminated in the axial direction, the piece-like portion 341c is prevented from falling in the radial direction without deteriorating the magnetic characteristics. be able to. In addition, the connection laminated steel plate 345 arrange | positioned at an axial direction other end side does not need to have the connection crimping part 345p. *
さらに、第１積層鋼板３４１、第２積層鋼板３４２および連結積層鋼板３４５には、第１カシメ部３４１ｐ、第２カシメ部３４２ｐ、および連結カシメ部３４５ｐに隣接する位置に、軸方向に貫通する貫通溝が形成されてもよい。　 Further, the first laminated steel plate 341, the second laminated steel plate 342, and the connected laminated steel plate 345 penetrate through the first caulking portion 341p, the second caulking portion 342p, and the connecting caulking portion 345p in the axial direction. A groove may be formed. *
図３２に示すように、第１積層鋼板３４１の片状部３４１ｃの径方向内側の内壁には、径方向外側に向かって凹む第１貫通溝３４１ｒが形成されている。第１貫通溝３４１ｒは、第１積層鋼板３４１を軸方向に貫通する。第１貫通溝３４１ｒは、貫通部３４１ｂと径方向に連通する。言い換えると、第１貫通溝３４１ｒは、貫通部３４１ｂを構成する内壁の一部に位置する。ロータの組立時において、第１貫通溝３４１ｒを構成する内壁は、マグネットの外側面と径方向に対向する。マグネットの挿入前の状態においては、第１貫通溝３４１ｒを構成する内壁は、第１ベース部３４１ａの外側面と径方向に対向する。軸方向から見たときに、第１貫通溝３４１ｒの開口部の外形は、周方向を長手方向とする形状である。なお、軸方向から見たときに、第１貫通溝３４１ｒの外形は、径方向内側に開口する略Ｃ字であってもよい。本実施形態において、径方向から見たときに、第１貫通溝３４１ｒの外形は、略矩形である。　 As shown in FIG. 32, a first through groove 341r is formed in the inner wall on the radially inner side of the piece-like portion 341c of the first laminated steel plate 341. The first through groove 341r is recessed toward the radially outer side. The first through groove 341r penetrates the first laminated steel plate 341 in the axial direction. The first through groove 341r communicates with the through part 341b in the radial direction. In other words, the first through groove 341r is located at a part of the inner wall constituting the through part 341b. When the rotor is assembled, the inner wall that forms the first through groove 341r faces the outer surface of the magnet in the radial direction. In a state before the magnet is inserted, the inner wall constituting the first through groove 341r faces the outer surface of the first base portion 341a in the radial direction. When viewed from the axial direction, the outer shape of the opening of the first through groove 341r is a shape whose longitudinal direction is the circumferential direction. In addition, when viewed from the axial direction, the outer shape of the first through groove 341r may be a substantially C-shape that opens radially inward. In the present embodiment, when viewed from the radial direction, the outer shape of the first through groove 341r is substantially rectangular. *
同様に、第２積層鋼板３４２の大径部３４２ｃの径方向内側の内壁には、径方向外側に向かって凹む第２貫通溝３４２ｒが形成されている。第２貫通溝３４２ｒは、第２積層鋼板３４２を軸方向に貫通する。第２貫通溝３４２ｒは、貫通部３４２ｂと径方向に連通する。言い換えると、第２貫通溝３４２ｒは、貫通部３４２ｂを構成する内壁の一部に位置する。ロータの組立時において、第２貫通溝３４２ｒを構成する内壁は、マグネットの外側面と径方向に対向する。マグネットの挿入前の状態においては、第２貫通溝３４２ｒを構成する内壁は、第２ベース部３４２ａの外側面と径方向に対向する。軸方向から見たときに、第２貫通溝３４２ｒの開口部の外形は、周方向を長手方向とする形状である。なお、軸方向から見たときに、第２貫通溝３４２ｒの開口部の外形は、径方向内側に開口する略Ｃ字であってもよい。本実施形態において、径方向から見たときに、第２貫通溝３４２ｒの外形は、略矩形である。　 Similarly, a second through groove 342r is formed on the inner wall on the radially inner side of the large-diameter portion 342c of the second laminated steel plate 342 so as to be recessed toward the radially outer side. The second through groove 342r penetrates the second laminated steel plate 342 in the axial direction. The second through groove 342r communicates with the through portion 342b in the radial direction. In other words, the second through groove 342r is located at a part of the inner wall constituting the through portion 342b. When the rotor is assembled, the inner wall constituting the second through groove 342r faces the outer surface of the magnet in the radial direction. In the state before the magnet is inserted, the inner wall constituting the second through groove 342r faces the outer surface of the second base portion 342a in the radial direction. When viewed from the axial direction, the outer shape of the opening of the second through groove 342r is a shape whose longitudinal direction is the circumferential direction. Note that when viewed from the axial direction, the outer shape of the opening of the second through groove 342r may be a substantially C-shape that opens radially inward. In the present embodiment, when viewed from the radial direction, the outer shape of the second through groove 342r is substantially rectangular. *
同様に、図３６に示すように、連結積層鋼板３４５の大径部３４５ｃの径方向内側の内壁には、径方向外側に向かって凹む連結貫通溝３４５ｒが形成されている。連結貫通溝３４５ｒは、連結積層鋼板３４５を軸方向に貫通する。連結貫通溝３４５ｒは、貫通部３４５ｂと径方向に連通する。ロータの組立時において、連結貫通溝３４５ｒを構成する内壁は、マグネットの外側面と径方向に対向する。マグネットの挿入前の状態においては、連結貫通溝３４５ｒを構成する内壁は、連結ベース部３４５ａの外側面と径方向に対向する。軸方向から見たときに、連結貫通溝３４５ｒの外形は、周方向を長手方向とする形状である。なお、軸方向から見たときに、連結貫通溝３４５ｒの開口部の外形は、径方向内側に開口する略Ｃ字であってもよい。本実施形態において、径方向から見たときに、連結貫通溝３４５ｒの外形は、略矩形である。　 Similarly, as shown in FIG. 36, a connecting through groove 345r that is recessed toward the radially outer side is formed in the inner wall on the radially inner side of the large diameter portion 345c of the connected laminated steel plate 345. The connection through groove 345r penetrates the connection laminated steel plate 345 in the axial direction. The connecting through groove 345r communicates with the through portion 345b in the radial direction. When the rotor is assembled, the inner wall constituting the coupling through groove 345r faces the outer surface of the magnet in the radial direction. In a state before the magnet is inserted, the inner wall constituting the coupling through groove 345r faces the outer surface of the coupling base portion 345a in the radial direction. When viewed from the axial direction, the outer shape of the connecting through groove 345r is a shape whose longitudinal direction is the circumferential direction. In addition, when viewed from the axial direction, the outer shape of the opening of the coupling through groove 345r may be a substantially C-shape that opens radially inward. In the present embodiment, the outer shape of the coupling through groove 345r is substantially rectangular when viewed from the radial direction. *
上述のように、第１積層鋼板３４１、第２積層鋼板３４２、および連結積層鋼板３４５を積層した場合、第１貫通溝３４１ｒ、第２貫通溝３４２ｒ、および連結貫通溝３４５ｒの周方向および径方向の位置は同じである。言い換えれば、第１積層鋼板３４１、第２積層鋼板３４２、および連結積層鋼板３４５を積層した場合、第１貫通溝３４１ｒ、第２貫通溝３４２ｒ、および連結貫通溝３４５ｒは、軸方向に重なる。　 As described above, when the first laminated steel plate 341, the second laminated steel plate 342, and the connected laminated steel plate 345 are laminated, the circumferential direction and the radial direction of the first through groove 341r, the second through groove 342r, and the connected through groove 345r. The positions of are the same. In other words, when the 1st laminated steel plate 341, the 2nd laminated steel plate 342, and the connection lamination steel plate 345 are laminated, the 1st penetration slot 341r, the 2nd penetration slot 342r, and the connection penetration slot 345r overlap in the direction of an axis. *
これにより、第１カシメ部３４１ｐ、第２カシメ部３４２ｐ、および連結カシメ部３４５ｐを設けるために第１積層鋼板３４１、第２積層鋼板３４２、および連結積層鋼板３４５に対して塑性変形を行う場合であっても、マグネットが挿入される貫通部３４１ｂ，３４２ｂ，３４５ｂの変形を抑制することができる。その結果、上述のカシメ部３４１ｐ，３４２ｐ，３４５ｐを設ける場合であっても、ロータコア（すなわち、貫通部）の寸法に影響を
与えることがなく、マグネットを貫通部に容易に挿入することができる。　 Thereby, in the case where plastic deformation is performed on the first laminated steel plate 341, the second laminated steel plate 342, and the connected laminated steel plate 345 in order to provide the first caulking portion 341p, the second caulking portion 342p, and the connecting caulking portion 345p. Even if it exists, the deformation | transformation of the penetration parts 341b, 342b, and 345b in which a magnet is inserted can be suppressed. As a result, even when the caulking portions 341p, 342p, and 345p are provided, the magnet can be easily inserted into the penetrating portion without affecting the dimensions of the rotor core (that is, the penetrating portion).
なお、第１積層鋼板３４１、第２積層鋼板３４２、および連結積層鋼板３４５は、それぞれ、必ずしも、第１貫通溝３４１ｒ、第２貫通溝３４２ｒ、および連結貫通溝３４５ｒを有する必要はない。各種の積層鋼板は、各貫通溝を有していなくてもよい。同種の積層鋼板が積層される場合には、貫通溝を有する積層鋼板と貫通溝を有しない積層鋼板とが組み合わさって積層されてもよい。　 The first laminated steel plate 341, the second laminated steel plate 342, and the connected laminated steel plate 345 do not necessarily need to have the first through groove 341r, the second through groove 342r, and the connected through groove 345r, respectively. Various laminated steel plates may not have each through groove. When the same kind of laminated steel sheets are laminated, a laminated steel sheet having a through groove and a laminated steel sheet not having a through groove may be combined and laminated. *
さらに、第１積層鋼板３４１の凹部３４１ｅには、テーパー部３４１ｅ１が形成されもてよい。図３２に示すように、軸方向から見たときに、凹部３４１ｅを構成する内側面のうち、周方向両側の部位には、テーパー部３４１ｅ１が形成されている。すなわち、凹部３４１ｅの周方向の寸法は、径方向外側から径方向内側に向かって徐々に小さくなる。　 Further, a tapered portion 341e1 may be formed in the concave portion 341e of the first laminated steel plate 341. As shown in FIG. 32, when viewed from the axial direction, tapered portions 341e1 are formed at portions on both sides in the circumferential direction of the inner surface constituting the concave portion 341e. That is, the circumferential dimension of the recess 341e gradually decreases from the radially outer side toward the radially inner side. *
これにより、第１積層鋼板３４１を金属板等からプレス加工等により打ち抜く際に、金型によって金属板等を容易に打ち抜くことができる。その結果、凹部およびテーパー部がない場合と比較して、第１積層鋼板３４１の製造にかかる工程および工数を削減することができる。 Thereby, when punching out the 1st laminated steel plate 341 from a metal plate etc. by press work etc., a metal plate etc. can be easily punched out by a metallic mold. As a result, the steps and man-hours required for manufacturing the first laminated steel plate 341 can be reduced as compared with the case where there are no recess and taper.
本発明は、例えばロータコア、ロータ、モータにおいて利用可能である。 The present invention can be used in, for example, a rotor core, a rotor, and a motor.
１・・・モータ、２・・・ステータ、３・・・ロータ、２１・・・ステータコア、２１ａ・・・コアバック、２２・・・インシュレータ、２３・・・コイル、３１・・・シャフト、３２・・・マグネット、３３・・・空間部、３３ａ・・・柱部、３３ｂ・・・外周部、３４・・・樹脂部、４０・・・ロータコア、４１・・・第１積層鋼板、４１ａ・・・第１ベース部、４１ｂ・・・貫通部、４１ｃ・・・片状部、４１ｄ・・・孔部、４１ｅ・・・凸部、４１ｗ・・・外縁部、４２・・・第２積層鋼板、４２ａ・・・第２ベース部、４２ｂ・・・貫通部、４２ｃ・・・環状部、４２ｄ・・・孔部、４２ｅ・・・凸部、４２ｆ・・・大径部、４２ｇ・・・小径部、４２ｈ・・・突起部、４２ｎ・・・外向き突起部、４２ｗ・・・外縁部、４３・・・連結積層鋼板、４３ａ・・・連結ベース部、４３ｂ・・・貫通部、４３ｃ・・・連結環状部、４３ｄ・・・孔部、４３ｅ・・・凸部、４３ｆ・・・大径部、４３ｇ・・・小径部、４３ｋ・・・連結部、４３ｍ・・・接続部、４３ｗ・・・外縁部、４４・・・連結積層鋼板、４４ａ・・・連結ベース部、４４ｂ・・・貫通部、４４ｃ・・・連結片状部、４４ｄ・・・孔部、４４ｅ・・・凹部、４４ｋ・・・連結部、４４ｗ・・・外縁部、４５・・・連結積層鋼板、４５ａ・・・連結ベース部、４５ｂ・・・貫通部、４５ｃ・・・連結片状部、４５ｄ・・・孔部、４５ｅ・・・凹部、４５ｋ・・・連結部、４５ｎ・・・外向き突起部、４５ｗ・・・外縁部、４６・・・第１積層鋼板、４６ａ・・・第１ベース部、４６ｂ・・・貫通部、４６ｃ・・・片状部、４６ｄ・・・孔部、４６ｅ・・・凹部、４６ｗ・・・外縁部、４７・・・第２積層鋼板、４７ａ・・・第２ベース部、４７ｂ・・・貫通部、４７ｃ・・・環状部、４７ｄ・・・孔部、４７ｅ・・・凹部、４７ｆ・・・大径部、４７ｇ・・・小径部、４７ｗ・・・外縁部、５０・・・貫通部、５１・・・第１貫通部、５２・・・第２貫通部、１００・・・切断装置、１０１・・・台座部、１０２・・・押さえ部材、１０３・・・切断工具、１０３ａ・・・刃部、１０３ｂ・・・角部、１０３ｃ・・・平面部、１０４・・・切断工具、２００・・・切断部材、３４１・・・第１積層鋼板、３４２・・・第２積層鋼板、３４５・・・連結積層鋼板、３４１ｐ・・・第１カシメ部、３４２ｐ・・・第２カシメ部、３４５ｐ・・・連結カシメ部、３４１ｐ１・・・第１カシメ部の第１凸部、３４２ｐ１・・・第２カシメ部の第２凸部、３４５ｐ１・・・連結カシメ部３４１の連結凸部、３４１ｐ２・・・第１カシメ部の第１凹部、３４２ｐ２・・・第２カシメ部の第２凹部、３４５ｐ２・・・連結カシメ部３４１の連結凹部、３４１ｂ・・・第１積層鋼板の貫通部、３４２ｂ・・・第２積層鋼板の貫通部、３４５ｂ・・・連結積層鋼板の貫通部、３４１ｃ・・・第１積層鋼板の片状部、３４２ｃ・・・第２積層鋼板の大径部、３４５ｃ・・・連結積層鋼板の大径部 DESCRIPTION OF SYMBOLS 1 ... Motor, 2 ... Stator, 3 ... Rotor, 21 ... Stator core, 21a ... Core back, 22 ... Insulator, 23 ... Coil, 31 ... Shaft, 32 ... Magnet 33 ... Space part 33a ... Column part 33b ... Outer peripheral part 34 ... Resin part 40 ... Rotor core 41 ... First laminated steel sheet 41a .... First base part, 41b ... penetrating part, 41c ... piece-like part, 41d ... hole, 41e ... convex part, 41w ... outer edge part, 42 ... second lamination Steel plate, 42a ... 2nd base part, 42b ... penetration part, 42c ... annular part, 42d ... hole part, 42e ... convex part, 42f ... large diameter part, 42g ...・ Small diameter part, 42h ... projection part, 42n ... outward projection part, 42w ... outer edge part, 43 ... Connection laminated steel plate, 43a ... connection base portion, 43b ... through portion, 43c ... connection annular portion, 43d ... hole, 43e ... projection, 43f ... large diameter portion, 43g ... small diameter part, 43k ... connection part, 43m ... connection part, 43w ... outer edge part, 44 ... connection laminated steel sheet, 44a ... connection base part, 44b ... penetration part, 44c: Connecting piece-like portion, 44d: Hole portion, 44e ... Recessed portion, 44k ... Connecting portion, 44w ... Outer edge portion, 45 ... Connected laminated steel plate, 45a ... Connecting base , 45b ... penetrating part, 45c ... connecting piece-like part, 45d ... hole, 45e ... recessed part, 45k ... connecting part, 45n ... outward projecting part, 45w ... -Outer edge part, 46 ... 1st laminated steel plate, 46a ... 1st base part, 46b ... Through part, 46c・ Strip-shaped part, 46d ... hole, 46e ... concave, 46w ... outer edge part, 47 ... second laminated steel sheet, 47a ... second base part, 47b ... through part, 47c ... annular portion, 47d ... hole, 47e ... concave portion, 47f ... large diameter portion, 47g ... small diameter portion, 47w ... outer edge portion, 50 ... penetrating portion, 51 ... 1st penetration part, 52 ... 2nd penetration part, 100 ... Cutting device, 101 ... Base part, 102 ... Holding member, 103 ... Cutting tool, 103a ... Blade Part, 103b ... corner part, 103c ... plane part, 104 ... cutting tool, 200 ... cutting member, 341 ... first laminated steel sheet, 342 ... second laminated steel sheet, 345 ..Connected laminated steel sheets, 341p: first caulking part, 342p: second caulking part, 345p: connecting caulking Part, 341p1 ... first convex part of the first caulking part, 342p1 ... second convex part of the second caulking part, 345p1 ... connecting convex part of the connecting caulking part 341, 341p2 ... first caulking First concave portion, 342p2 ... second concave portion of second caulking portion, 345p2 ... connecting concave portion of connecting caulking portion 341, 341b ... penetrating portion of first laminated steel plate, 342b ... second laminated layer Penetration part of steel plate, 345b ... penetration part of connected laminated steel sheet, 341c ... piece-like part of first laminated steel sheet, 342c ... large diameter part of second laminated steel sheet, 345c ... of connected laminated steel sheet Large diameter part

Claims (14)

  1. 中心軸に対して径方向に拡がる第１積層鋼板及び第２積層鋼板を有し、

    前記第１積層鋼板は、

    　前記中心軸の径方向外側に位置する第１ベース部と、

    　前記第１ベース部の径方向外側に貫通部を介して離隔して配置され、周方向に所定間隔で配置される複数の片状部と、

    を有し、

    前記第２積層鋼板は、

    　前記中心軸の径方向外側に位置する第２ベース部と、

    　前記第２ベース部の径方向外側に貫通部を介して離隔して配置され、周方向に延びる環状部と、

    を有し、

    　前記環状部は、前記中心軸を基準とする外径が互いに異なる大径部及び小径部を有し、

    　前記大径部と前記小径部と、は、周方向に交互に配置され、

    　複数の前記第１積層鋼板と、少なくとも１枚の前記第２積層鋼板と、が軸方向に積層され、

    　前記片状部は、軸方向に突出する第１カシメ部を有し、

    　前記大径部は、前記片状部と軸方向に重なり、かつ、軸方向に突出し前記第１カシメ部と軸方向に重なる第２カシメ部を有する、ロータコア。
    Having a first laminated steel sheet and a second laminated steel sheet extending radially with respect to the central axis;

    The first laminated steel sheet is

    A first base portion located radially outside the central axis;

    A plurality of piece-like parts arranged at a predetermined interval in the circumferential direction, spaced apart from each other via a penetrating part on the radially outer side of the first base part;

    Have

    The second laminated steel sheet is

    A second base portion located radially outside the central axis;

    An annular portion that is arranged radially apart from the second base portion via a penetrating portion and extends in the circumferential direction;

    Have

    The annular portion has a large diameter portion and a small diameter portion having different outer diameters based on the central axis,

    The large diameter portions and the small diameter portions are alternately arranged in the circumferential direction,

    A plurality of the first laminated steel sheets and at least one second laminated steel sheet are laminated in the axial direction,

    The piece-like portion has a first caulking portion protruding in the axial direction,

    The large-diameter portion has a second caulking portion that overlaps with the piece-like portion in the axial direction and protrudes in the axial direction and overlaps with the first caulking portion in the axial direction.
  2. 軸方向から見たときに、前記第１カシメ部の外形および前記第２カシメ部の外形は、周方向を長手方向とする矩形または楕円形である、

    請求項１に記載のロータコア。     When viewed from the axial direction, the outer shape of the first caulking portion and the outer shape of the second caulking portion are rectangular or elliptical with the circumferential direction as the longitudinal direction.

    The rotor core according to claim 1.
  3. 前記片状部の径方向内側の内側面には、径方向外側に向かって凹み軸方向に貫通する第１貫通溝が形成され、

    　前記環状部の径方向内側の内側面には、径方向外側に向かって凹み軸方向に貫通する第２貫通溝が形成され、

    　前記第１貫通溝は、前記第１カシメ部の径方向内側に位置し、

    　前記第２貫通溝は、前記第２カシメ部の径方向内側に位置し、

    　前記第１貫通溝の周方向および径方向の位置は、前記第２貫通溝の径方向および周方向の位置と同じである、

    請求項１または請求項２に記載のロータコア。     A first through groove that is recessed toward the radially outer side and penetrates in the axial direction is formed on the radially inner side surface of the piece-like portion,

    A second through groove is formed on the inner surface of the annular portion on the radially inner side and is recessed toward the radially outer side and penetrates in the axial direction.

    The first through groove is located on the radially inner side of the first caulking portion,

    The second through groove is located on the radially inner side of the second caulking portion,

    The circumferential and radial positions of the first through groove are the same as the radial and circumferential positions of the second through groove.

    The rotor core according to claim 1 or 2.
  4. 前記中心軸に対する、周方向に隣り合う前記片状部同士の間の角度領域において、前記第１ベース部または前記第２ベース部の少なくとも一方が、外縁部から径方向内側に向かって凹む凹部を有し、

    　前記凹部を構成する内壁のうち、周方向の両側の部位には、テーパー部が形成され、

    　前記凹部の周方向の距離は、径方向外側から径方向内側に向かうにつれて徐々に小さくなる、

    請求項１から請求項３のいずれかに記載のロータコア。     In the angular region between the piece-like parts adjacent to each other in the circumferential direction with respect to the central axis, at least one of the first base part or the second base part is a concave part that is recessed radially inward from the outer edge part. Have

    Of the inner wall constituting the concave portion, tapered portions are formed on both sides in the circumferential direction,

    The circumferential distance of the recess gradually decreases from the radially outer side toward the radially inner side,

    The rotor core according to any one of claims 1 to 3.
  5. 前記第１積層鋼板の軸方向両側には、それぞれ、前記第２積層鋼板が配置される、

    請求項１から請求項４のいずれかに記載のロータコア。     The second laminated steel plates are respectively disposed on both sides in the axial direction of the first laminated steel plates.

    The rotor core according to any one of claims 1 to 4.
  6. 前記第１積層鋼板の軸方向の一端に位置する前記第２積層鋼板の、さらに軸方向一端側には、他の前記第２積層鋼板が積層される、

    請求項５に記載のロータコア。     The second laminated steel sheet, which is located at one end in the axial direction of the first laminated steel sheet, is further laminated on the one axial end side with the other second laminated steel sheet,

    The rotor core according to claim 5.
  7. 前記第１積層鋼板の枚数は、３枚～１０枚である、

    請求項５または請求項６に記載のロータコア。     The number of the first laminated steel sheets is 3 to 10 sheets,

    The rotor core according to claim 5 or 6.
  8. 中心軸に対して径方向に拡がる連結積層鋼板をさらに有し、

    　前記連結積層鋼板は、

    　　前記中心軸の径方向外側に位置する連結ベース部と、

    　　前記連結ベース部の径方向外側に貫通部を介して離隔して配置され、周方向に延びる連結環状部と、

    　　前記連結ベース部と、前記連結環状部と、を連結する連結部と、

    を有し、

    　前記連結環状部は、軸方向に突出し、前記第１カシメ部および前記第２カシメ部の少なくともいずれか一方と軸方向に重なる連結カシメ部を有し、

    前記連結積層鋼板は、前記第２積層鋼板の軸方向の一端及び他端の少なくともいずれか一方側に配置される、

    請求項５から請求項７のいずれか一項に記載のロータコア。     It further has a connected laminated steel sheet extending in the radial direction with respect to the central axis

    The connected laminated steel sheet is

    A connecting base portion located radially outside the central axis;

    A connecting annular portion that is arranged radially apart from the connecting base portion via a penetrating portion and extends in the circumferential direction;

    A connecting portion that connects the connecting base portion and the connecting annular portion;

    Have

    The connecting annular portion has a connecting caulking portion that protrudes in the axial direction and overlaps at least one of the first caulking portion and the second caulking portion in the axial direction;

    The connected laminated steel plates are arranged on at least one side of one end and the other end in the axial direction of the second laminated steel plates,

    The rotor core according to any one of claims 5 to 7.
  9. 少なくとも１枚の前記連結積層鋼板は、軸方向の他端に位置する前記第２積層鋼板のさらに軸方向他端側に配置される、

    請求項８に記載のロータコア。     At least one of the connected laminated steel plates is disposed further on the other axial end side of the second laminated steel plate located at the other axial end.

    The rotor core according to claim 8.
  10. 少なくとも１枚の前記連結積層鋼板は、軸方向の一端に位置する前記第２積層鋼板のさらに軸方向一端側に配置される、

    請求項８または請求項９に記載のロータコア。     At least one of the laminated laminated steel plates is disposed further on one axial end side of the second laminated steel plate located at one axial end.

    The rotor core according to claim 8 or 9.
  11. 請求項１から請求項１０のいずれか一項に記載されたロータコアと、

    　前記ロータコアの前記貫通部に配置される複数のマグネットと、

    を有し、

    　前記ロータコアは、周方向に隣り合う前記貫通部同士の間に各々配置され、前記ロータコアを軸方向に貫通する複数の空間部を有し、

    　前記貫通部は、前記第１ベース部及び前記片状部と、前記第２ベース部及び前記環状部と、によって構成されるロータ。
    A rotor core according to any one of claims 1 to 10,

    A plurality of magnets disposed in the penetrating portion of the rotor core;

    Have

    The rotor core is disposed between the through portions adjacent to each other in the circumferential direction, and has a plurality of space portions penetrating the rotor core in the axial direction.

    The penetration part is a rotor constituted by the first base part and the piece-like part, and the second base part and the annular part.
  12. 請求項１１に記載されたロータコアと、

    　前記ロータコアの前記貫通部に配置される複数のマグネットと、

    を有し、　前記ロータコアは、周方向に隣り合う前記貫通部同士の間に各々配置される複数の空間部を有し、

    　前記空間部は、前記ロータコアを軸方向に貫通し、

    　前記貫通部は、前記第１ベース部及び前記片状部と、前記第２ベース部及び前記環状部と、前記連結ベース部及び前記連結環状部と、によって構成されるロータ。     A rotor core according to claim 11;

    A plurality of magnets disposed in the penetrating portion of the rotor core;

    The rotor core has a plurality of space portions respectively disposed between the through portions adjacent to each other in the circumferential direction;

    The space portion penetrates the rotor core in the axial direction,

    The penetration part is a rotor constituted by the first base part and the piece-like part, the second base part and the annular part, and the connection base part and the connection annular part.
  13. 前記空間部に設けられた樹脂部を有する請求項１１または請求項１２に記載のロータ。
    The rotor according to claim 11, further comprising a resin portion provided in the space portion.
  14. 請求項１１から請求項１３のいずれか一項に記載されたロータを備えるモータ。 A motor comprising the rotor according to any one of claims 11 to 13.
PCT/JP2019/012930 2018-03-29 2019-03-26 Rotor core, rotor, and motor WO2019189217A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980022048.3A CN111919358B (en) 2018-03-29 2019-03-26 Rotor core, rotor and motor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018064069 2018-03-29
JP2018-064069 2018-03-29

Publications (1)

Publication Number Publication Date
WO2019189217A1 true WO2019189217A1 (en) 2019-10-03

Family

ID=68061854

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/012930 WO2019189217A1 (en) 2018-03-29 2019-03-26 Rotor core, rotor, and motor

Country Status (2)

Country Link
CN (1) CN111919358B (en)
WO (1) WO2019189217A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021124501A1 (en) * 2019-12-19 2021-06-24 三菱電機株式会社 Stator, motor, compressor, and air conditioning device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110127859A1 (en) * 2008-07-14 2011-06-02 Hanning Electro-Werke GmbH & Co. KG Permanent-magnetic rotor
JP2015186304A (en) * 2014-03-20 2015-10-22 株式会社ジェイテクト Magnet embedded type rotor
JP2015192594A (en) * 2014-03-31 2015-11-02 ダイキン工業株式会社 Rotor and manufacturing method thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5887808B2 (en) * 2011-10-04 2016-03-16 日本精工株式会社 Electric power steering motor and electric power steering device
JP5858232B2 (en) * 2012-02-17 2016-02-10 日本電産株式会社 Rotor core, motor, and motor manufacturing method
JP6281147B2 (en) * 2012-08-07 2018-02-21 日本電産株式会社 Rotor and motor
JP6536273B2 (en) * 2015-08-10 2019-07-03 日本電産株式会社 Rotor and motor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110127859A1 (en) * 2008-07-14 2011-06-02 Hanning Electro-Werke GmbH & Co. KG Permanent-magnetic rotor
JP2015186304A (en) * 2014-03-20 2015-10-22 株式会社ジェイテクト Magnet embedded type rotor
JP2015192594A (en) * 2014-03-31 2015-11-02 ダイキン工業株式会社 Rotor and manufacturing method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021124501A1 (en) * 2019-12-19 2021-06-24 三菱電機株式会社 Stator, motor, compressor, and air conditioning device
JPWO2021124501A1 (en) * 2019-12-19 2021-06-24
JP7285961B2 (en) 2019-12-19 2023-06-02 三菱電機株式会社 Stators, electric motors, compressors and air conditioners

Also Published As

Publication number Publication date
CN111919358A (en) 2020-11-10
CN111919358B (en) 2023-05-30

Similar Documents

Publication Publication Date Title
WO2018062488A1 (en) Rotor core, rotor, and motor
WO2018062490A1 (en) Rotor core, rotor, motor, method for producing rotor core, and method for producing rotor
WO2018062447A1 (en) Rotor, and motor
JP5859112B2 (en) Rotating electric machine armature and method of manufacturing rotating electric machine armature
US20130285500A1 (en) Rotor for a motor and a motor
JP5603437B2 (en) Laminated iron core for rotating electrical machine and method for manufacturing the same
JP4771107B1 (en) Rotating electric machine, rotating electric machine manufacturing method, and wind power generation system
WO2018062489A1 (en) Method for producing motor core, method for producing rotor core, and method for producing rotor
WO2019189217A1 (en) Rotor core, rotor, and motor
JP6509373B2 (en) Core sheet, divided laminated core and stator, and method of manufacturing divided laminated core
JP2012170295A (en) Stator of rotary electric machine and method of manufacturing the same
JP2003061319A (en) Method for producing stator
JP2016144395A (en) Motor armature
JP5462643B2 (en) Laminated iron core and method for manufacturing the same
JP5528164B2 (en) Stator for rotating electrical machine and method for manufacturing the same
JP2006081302A (en) Manufacturing method for laminated stator core
JP6244268B2 (en) Method for manufacturing armature core
JP2021044885A (en) Manufacturing method of laminated iron core, manufacturing method of electrical machine, manufacturing apparatus of laminated iron core, and electrical machine
WO2015186292A1 (en) Interior permanent magnet electric motor
JP5815336B2 (en) Rotating electric machine laminated iron core and method of manufacturing rotating electric machine laminated iron core
JP2000287394A (en) Permanent magnet electric motor
JP2020182272A (en) Split core of stator core, stator having the same, and method and device for manufacturing split core of stator core
JPH10150761A (en) Manufacture of pole stator for stepping motor

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: 19776632

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19776632

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP