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`Mitsuba - 1004
`Page 3 of 15
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`

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`Mitsuba - 1004
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`Page 4 of 15
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`

`

`JP1997-308163
`
`(19) Issuing Country: Japanese Patent Office (JP)
`
`(12) Issue Type: Laid Open Unexamined Patent Application (A)
`
`(11) Kokai No.: Unexamined Patent Application H09-308163
`
`(43) Date Laid Open: November 28, 1997
`
`(54) Title of Invention: Electric Motor
`
`(51) IPC Ver. 6
`
`H02K 3/50
`
`[ F I ]
`
`H02K 3/50 A
`
`Request for Examination: None
`
`Number of Claims: 1
`
`Form of Application: FD
`
`Total Pages: 4
`
`(21) Application No.: H08-143568
`
`(22) Date of Filing: May 13, 1996
`
`(71) Applicant
`
`ID: 000006622
`
`Name: Yasukawa Electric, Ltd.
`
`(72) Inventor:
`
`Name: Makoto IIKUMA
`
`(57) Abstract
`
`Problem:
`
`To simplify the installation of a wiring plate without reducing the cross sectional
`
`area of a magnetic circuit in a stator core.
`
`Solution Means
`
`An electric motor in which an outside arc portion 6, an inside arc portion 7, and a
`
`linking winding portion 8 connecting these arc portions are provided, and divided iron
`
`cores 9, in which stator windings 16 are wound onto these linking winding portions 8,
`
`are disposed in a ring-shape, [further] providing: an insulator 12 attached to a stator
`
`core 5 linking connecting portion 8 and wound with the stator winding 16, an engaging
`
`J
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`JP1997-308163
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`indentation 28 disposed on an insulator 12 flange portion 14, a wiring plate 23 formed of
`
`an insulating material, wherein a conductor is embedded in the plate, for connecting the
`
`winding ends of stator windings 16, and an attaching arm 27 disposed on the reverse
`
`surface of the wiring plate 23 and having a hook portion 26 for engaging an engaging
`
`indentation 28 [ on] insulator 12.
`
`Document Title: Claims
`
`Claim 1
`
`An electric motor in which an outside arc portion, an inside arc portion,
`
`and a linking winding portion connecting these arc portions are provided, and divided
`
`iron cores, in which stator windings are wound onto these linking winding portions, are
`
`disposed in a ring-shape, [further] providing: an insulator attached to the stator core
`
`linking connecting portion and wound with a stator winding , an engaging indentation
`
`disposed on the insulator flange portion, a wiring plate formed of an insulating material,
`
`wherein a conductor is embedded in the plate to connect the winding ends of the stator
`
`windings, and an attaching arm disposed on the reverse surface of the wiring plate and
`
`having a hook portion for engaging the engaging indentation [on] the insulator.
`
`2
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`JP1997-308163
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`Detailed Description of the Invention
`
`0001
`
`Technical Field of the Invention
`
`The present invention pertains to an electric motor comprising a wiring plate for
`
`connecting the winding ends of stator windings.
`
`0002
`
`Conventional Art
`
`Conventionally, electric motors comprising wiring plates for connecting stator
`
`winding ends have been constituted as shown in Fig. 6. In the figure, 40 is a stator core,
`
`constituted as follows: divided iron cores 41 having an inside arc portion 41 b, an outside
`
`arc portion 41 a, and a linking winding portion for linking these arc portions are arrayed in
`
`a ring shape; convex portions 41 c projecting in the circumferential direction on one end
`
`surface of the outside arc portion 41 a are caused to engage an indented portion 41 d
`
`provided on the other end surface of the outside arc portion 41 a on an adjoining divided
`
`iron core 41. An insulator is provided on the divided iron core 41 linking winding portion,
`
`and a stator winding 42 is wound onto this insulator. 43 is a wiring plate attached to a
`
`support column 44 affixed to the end surface of the stator cores 40; multiple throughholes
`
`45 are provided on the plate surface of this wiring plate, and printed wiring 46 is [formed]
`
`between these through holes 45; the stator winding 42 winding ends are inserted into the
`
`through holes 45 [to] connect the stator winding 42 connecting portions.
`
`0003
`
`Problems the Invention Seeks to Resolve
`
`In the conventional art, however, holes are machined on the end surface of the
`
`stator core 40 for attaching the support column 44, thereby reducing the cross sectional
`
`area of the stator core magnetic circuit and complicating the attachment task. The present
`
`invention has the object of simplifying the task of attaching a wiring plate without reducing
`
`the cross sectional area of the magnetic circuit in a stator core.
`
`0004
`
`3
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`JP 1997-308163
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`Means for Resolving Problem
`
`To solve the problem, the invention is an electric motor in which an outside arc
`
`portion, an inside arc portion, and a linking winding portion connecting these arc portions
`
`are provided, and divided iron cores, in which stator windings are wound onto these
`
`linking winding portions, are disposed in a ring-shape, [further] providing : an insulator
`
`attached to the stator core linking connecting portion and wound with a stator winding, an
`
`engaging indentation disposed on the insulator flange portion, a wiring plate formed of an
`
`insulating material, wherein a conductor is embedded in the plate to connect the winding
`
`ends of the stator windings, and an attaching arm disposed on the reverse surface of the
`
`wiring plate and having a hook portion for engaging the engaging indentation [on] the
`
`insulator.
`
`0005
`
`Embodiments of the Invention
`
`Below, referring to figures, we explain embodiments of the invention.
`
`Fig. 1 is a cross section of the upper portion of an electric motor; Fig. 2 is a
`
`perspective view of a divided iron core and insulator; Fig . 3 is a perspective view of the
`
`main portions constituting a stator core to which an insulator is attached; Fig. 4 is a
`
`perspective view of a wiring plate; Fig. 5 is a cross section of main portions of a
`
`constitution in which a wiring plate is attached to an insulator. In the figures, 1 is an electric
`
`motor; 2 is a frame for the electric motor 1; 3 is a load-side bracket attached to the load(cid:173)
`
`side end portion of the frame 2; 4 is an anti-load-side bracket attached to the end opposite
`
`the load-side end portion of the frame 2. 5 is a stator core attached to the inside
`
`circumferential surface of the frame 2; as shown in Fig. 2, the divided iron cores 9, made
`
`up of an outside arc portion 6, an inside arc portion 7, and a linking winding portion 8, are
`
`arrayed
`
`in
`
`the circumferential direction ; a convex portion 10 projecting
`
`in
`
`the
`
`circumferential direction is provided on the end surface on one side of the divided iron
`
`core 9 outside arc portion 6, and this convex portion 10 is caused to engage with an
`
`indentation 11 provided on the other end surface of the divided iron core 9. 12 is an
`
`insulator, made up of a cylindrical body portion 13 and flange portions 14 and 15 formed
`
`4
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`JP 1997-308163
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`at the two ends of this cylindrical body portion 13. A stator winding 16 is wound on the
`
`cylindrical body portion 13 of the insulator 12, and a rectangular projection 17 projecting
`
`to the side is provided on the end surface in the axial direction of one of the flange portions
`
`14. Channels 18 and 19, crimping the winding ends of the stator winding 16, are disposed
`
`on both sides of the projection 17. An engaging arm 21 having a hook portion 20 is
`
`provided on the side surface in the circumferential direction of the flange portion 14, and
`
`a channel 22 engaged by the engaging arm 21 hook portion 20 is provided on the side
`
`surface of the flange portion 14. 23 is a wiring plate mounted on the axial-direction end
`
`portion of stator winding 16 for connecting winding ends, formed in a disk shape as shown
`
`in Fig. 4, having semicircular indented portions 24 on its inner and outer perimeters, with
`
`connecting hardware 25 affixed close to these indented portions 24. A conductor, not
`
`shown, for connecting the stator winding 16 winding ends is embedded inside the wiring
`
`plate, and connects the stator windings 16. An attaching arm 27 with a hook portion 26 is
`
`disposed on the reverse surface of the wiring plate 23, and engages the engaging
`
`indentation 28 disposed on the insulator 6 flange portion 14. 29 is a rotor disposed on a
`
`rotary shaft 31 supported by a load-side bracket 3 and anti-load-side bracket 4 bearings
`
`30; 32 is a seat affixed to frame 2; 33 is a receptacle, connected to the wiring plate 23 by
`
`a lead wire 34. 35 is an insulating resin covering the stator winding 16. Assembly of a
`
`stator core thus constituted is performed as follows. First, an insulator 12 is attached to
`
`the linking winding portion 8 of the divided iron cores 9. Next, a stator winding 16 is wound
`
`onto the cylindrical body portion 13 of this insulator 12. In addition, the winding end of the
`
`stator winding 16 is inserted into the channel 18 disposed on the insulator 12 flange
`
`portion 14, and the winding end is wound one half-rotation around the projection 17.
`
`Thereafter, the winding end is inserted into a channel 19 and the stator winding 16 is
`
`affixed to the insulator 12. Thus the divided cores 9 on which stator winding 16 are wound
`
`are arrayed in a ring shape, and divided core 9 convex portions 10 are inserted into
`
`adjacent divided iron core 9 indented portions 11 to affix adjacent divided iron cores 9,
`
`while an insulator 12 engaging arm 21 is caused to engage an adjacent divided iron core
`
`insulator 12 channel 22 to affix insulators 12 to one another. Next, the wiring plate 23 is
`
`mounted on one side of a stator core 5, and a hook portion 26 on an attaching arm 27
`
`mounted on the reverse surface of the wiring plate 23 is engaged in the engaging
`
`5
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`JP 1997-308163
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`indentation 28 on the insulator 12 flange portion 14, thereby affixing the wiring plate 23 to
`
`the insulator 12. In this way, the winding end of stator winding 16 is inserted into and
`
`affixed to the connecting hardware 25 on the wiring plate 23, which is affixed to the
`
`insulator 12, thereby connecting the stator windings 16. The stator winding 16 is then
`
`covered by an insulating resin 35 to insulate the stator winding 16, and a stator core 5
`
`thus constituted is inserted and affixed in a frame 2. Hence the hook portion 26 disposed
`
`on the wiring plate 23 is engaged in the insulator 12 engaging indentation 28 and affixed,
`
`thereby simplifying the attachment of the wiring plate 23.
`
`0006
`
`Effect of the Invention
`
`As described above, in the invention a wiring plate 23 for connecting a stator
`
`winding 16 is affixed to an insulator 12, simplifying the task of attaching the wiring plate
`
`without reducing the cross sectional surface area of the stator core magnetic circuit.
`
`Brief Description of Figures
`
`Fig . 1: A cross section of the upper portion of an electric motor, showing an
`
`embodiment of the invention.
`
`Fig. 2: A perspective view of a divided iron core and insulator, showing an
`
`embodiment of the invention.
`
`Fig. 3: A perspective view of the main portions constituting a stator core to which
`
`an insulator is attached, showing an embodiment of the invention.
`
`Fig. 4: A perspective view of a wiring plate, showing an embodiment of the
`
`invention.
`
`Fig. 5: A cross section of main portions of a constitution in which a wiring plate is
`
`attached to an insulator, showing an embodiment of the invention.
`
`Fig. 6: A perspective view of a stator core with wiring plate attached, showing a
`
`conventional example.
`
`Explanation of Reference Numerals
`
`1: electric motor
`
`6
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`2. frame
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`3. load-side bracket
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`4. anti-load-side bracket
`
`5: stator core
`
`6: outside arc portion
`
`7: inside arc portion
`
`8: linking winding portion
`
`9: divided iron core
`
`10: convex portion
`
`11: indented portion
`
`12: insulator
`
`13: cylindrical body portion
`
`14: flange portion
`
`15: flange portion
`
`16: stator winding
`
`17: projection
`
`18: channel
`
`19: channel
`
`20: hook portion
`
`21: engaging arm
`
`22: channel
`
`23: wiring plate
`
`24: indented portion
`
`25: connecting hardware
`
`26: hook portion
`
`27: attaching arm
`
`28: engaging indentation
`
`29: rotor
`
`30: bearing
`
`31: rotary shaft
`
`32: seat
`
`JP1997-308163
`
`7
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`JP1997-308163
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`33: receptacle
`
`34: lead wire
`
`35: insulating resin
`
`Anti-Load(cid:173)
`Side Bracket JJ ·
`
`Fig. 1
`
`33 Receptacle -1 Electric Motor
`/
`5 Stator Core
`2 Frame
`3 Load-Side Bracket
`
`16 Stator Winding
`as Insulating Resin
`
`Bearing
`
`~ 31 Rotary Shaft
`O Insulator
`
`Fig. 2
`
`lasolatoc~
`
`Outside Arc Portion 6
`Indent(cid:173)
`ation 11
`
`Insulator 12
`
`Flange Portion14
`Ch an n e 119 ...__.:i:::~a-,;~
`
`lOConvex Portion
`·- -s Linking Winding Portion
`
`j[I
`
`-
`
`1lnside Arc Portion
`_
`22 Channel
`28 Engaging Indentation
`13 Cylindrical Body Portion
`111 Channel
`
`8
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`JP 1997-308163
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`Fig. 3
`
`22
`
`21
`
`22 Channel
`
`Fig. 4
`
`Fig. 5
`
`23
`
`Attaching 21
`Arm
`Hook 26
`Portion =~~~~~~·
`
`16
`
`9
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`JP1997-308163
`JP1997-308163
`
`Fig. 6
`
`
`
`1·1
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`10
`10
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`CERTIFICATION OF TRANSLATION
`
`I, Christopher L. Field, residing at 43 Sherman's Bridge Rd., Wayland
`MA, 01778, United States of America, declare and state as follows:
`
`I am well acquainted with the English and Japanese languages. I have
`in the past translated numerous Japanese documents of legal and/or
`technical content into English. I am fully accredited by the American
`Translators Association for Japanese to English translation.
`
`To a copy of this Japanese document I attach an English translation
`and my Certification of Translation. I hereby certify that the English
`translation of the attached document entitled "JP1997-308163, Electric
`Motor" is, to the best of my knowledge and ability, an accurate
`translation.
`
`I further declare that all statements made herein of my own knowledge
`are true, that all statements made on information and belief are
`believed to be true, and that false statements and the like are
`punishable by fine and imprisonment, or both, under Section 1001 of
`Title 18 of the United States Code.
`
`Signed,
`
`Christopher Field
`
`June 1, 2017
`Date
`
`Mitsuba - 1004
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