STATE OF CALIFORNIA
`
`ss
`
`))) )
`
`COUNTY OF SAN FRANCISCO
`
`CERTIFICATION
`
`This is to certify that the attached translation is, to the best of my knowledge and belief, a true
`
`and accurate translation from Japanese into English of the attached patent application with Laid-
`
`Open Publication Number: No. 11-341717, and Laid-Open Date: December 10, 1999. I
`
`understand that willful false statements and the like are punishable by fine or imprisonment, or
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`both, under Section 1001 of Title 18 of the United States Code.
`
`
`
`Mel Valentin, Project Manager
`Geotext Translations, Inc.
`
`
`
`A notary public or other officer completing this
`certificate verifies only the identity of the individual
`who signed the document to which this certificate
`is attached, and not the truthfulness, accuracy, or
`validity of that document.
`
`State of California, County of San Francisco
`Subscribed and sworn to (or affirmed) before me
`-(
`
`on this 751‘ m day of
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`proved to me on the basis of satisfactory evidence
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`'to be the person(s)whq,appeared before me.
`
`
`BRADLEY-‘RHYMER
`
`Commission '-No.2160632 (z,0
`‘ NOTARYPUBLIC-CALIFORNIA
`
`
`SAN FRANCISCO COUNTY
`My Comm, Expires JULY 22. 2020
`
`New York
`as ington, D.C.
`‘
`t: +1.212.63’l.7432
`t: +1.202.828,1267
`
`I n
`,x ’
`/
`/ t
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`./ 1.42425 {/1113/
`,‘ .2 (Wk,
`\
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`Signature:
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`Chicago
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`Houston
`t: +1.713.353.3909
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`t: +4 169.7593 4
`Am. Hon a v. 1v If.31”13112018—006”f92
`
`PETiHONDA71004—0001
`
`Am. Honda v. IV II - IPR2018-00619
`PET_HONDA_1004-0001
`
`

`

`(19) The Japanese Patent Office (JP)
`
`
`(12) PATENT APPLICATION
`LAID-OPEN PUBLICATION (A)
`
`(11) Laid-Open Publication Number:
`No. 11-341717
`(43) Laid-Open Date: December 10, 1999
`
`Identification symbol
`
`
`
`(21) Application Number: 10-147077
`
`(22) Filing Date: May 28, 1998
`
`
`
`Request for Examination (not filed) Number of Claims: 32 (total 14 pages)r
`(71) Applicant:
`000006242
`Matsushita Seiko KK
`6-2-61 Imafukunishi, Joto-ku, Osaka-shi, Osaka-fu
`(72) Inventor: Hiroyuki Inoue
`c/o Matsushita Seiko KK
`6-2-61 Imafukunishi, Joto-ku, Osaka-shi, Osaka-fu
`Toyoharu Okayama
`c/o Matsushita Seiko KK
`6-2-61 Imafukunishi, Joto-ku, Osaka-shi, Osaka-fu
`Patent Attorney Tomoyuki Takimoto (and one
`other)
`
`(72) Inventor:
`
`(74) Agent:
`
`
`
`
`
`
`
`(54) [Title of Invention] STATOR FOR ELECTRIC MOTOR
`AND METHOD OF MANUFACTURING SAME
`
`(57) [Abstract]
`[Object] To provide a stator for an electric motor that does not
`require high precision in joining teeth to a yoke, minimizing the
`cutting area to ensure that motor efficiency does not decrease.
`[Solution] By the winding of winding conductor 9 around tooth
`portions 12 of unit iron core body 8 provided with yoke portions 11
`formed with an arcuate outer periphery and a planar portion 1 on an
`inner periphery thereof, the tooth portions 12 provided on the planar
`portion and having a pole shoe 4 defining a rotor opposing surface 3
`on the inner peripheral edge thereof; and by annularly arranging so
`that the side end surfaces of the yoke portions 11 closely contact one
`another, a stator for an electric motor can be obtained wherein high
`precision in joining the tooth to the yoke is not required, and
`decreased motor efficiency can be prevented.
`
`1 planar portion
`3 rotor opposing
`surface
`4 pole shoe
`8 unit iron core body
`9 winding conductor
`11 yoke portion
`12tooth portion
`
`
`
`
`
`Am. Honda v. IV II - IPR2018-00619
`PET_HONDA_1004-0002
`
`

`

`[Claims]
`[Claim 1] A stator for an electric motor comprising yoke portion iron
`cores with an arcuate outer circumferential surface and a planar inner
`circumference, unit iron core bodies formed by laminating unit iron
`cores provided with a tooth portion iron core having a rotation
`opposing surface formed on a pole shoe portion at an inner
`circumferential end provided on a planar portion of the yoke portion
`iron core, and a winding conductor wound around the tooth portion
`of the unit iron core body; wherein the unit iron core bodies are
`arranged in a ring shape so that both end faces of the yoke portion of
`the unit iron core body come into close contact with each other in a
`circumferential direction.
`[Claim 2] The stator for an electric motor according to claim 1,
`wherein the winding conductor is wound around the tooth portion of
`the unit iron core bodies in a trapezoidal lamination alignment by
`progressively increasing a cross-sectional area of the winding toward
`the inner peripheral surface of the yoke portion.
`[Claim 3] A manufacturing method for a stator wherein a unit iron
`core, provided with a tooth portion iron core having a pole shoe
`portion defining a rotor opposing surface on an inner peripheral end
`provided on the planar portion of a yoke portion iron core within an
`arcuate outer circumferential surface and a planar portion inner
`circumference, is manufactured by punching out in a state in which
`directions are alternately changed in n rows (n is an integer of 2 or
`more columns) as one unit..
`[Claim 4] The method for manufacturing the stator for an electric
`motor according to claim 3, wherein in a manufacturing method
`involving punching out unit iron cores as one unit, by changing the
`inner circumferential surface portion of the yoke portion to the outer
`circumferential side or the inner circumferential side, a unit iron core
`is manufactured by enlarging or reducing the cross-sectional area of
`the winding portion of the winding conductor.
`[Claim 5] A method for manufacturing a stator for an electric motor,
`wherein in the punching step for the unit iron core the pressure force
`of the manufacturing equipment is used to manufacture the unit iron
`core body by press-contacting, crimping, or laminating with an
`adhesive.
`[Claim 6] In the punching step of the unit iron core, a method for
`manufacturing a stator for an electric motor, wherein the die, the jig
`or the material are heated and punched/laminated to manufacture the
`unit iron core body.
`[Claim 7] A stator for an electric motor, comprising the following: a
`yoke portion iron core provided with a concave portion for
`connecting on the arcuate outer circumferential surface and the inner
`circumference is formed by a planar portion, unit iron core bodies
`formed by laminating unit iron cores provided with a tooth portion
`iron core having a rotor facing surface formed on a pole shoe portion
`at an inner circumferential end provided at a planar portion of the
`yoke portion iron core, a winding conductor wound around the tooth
`portion of the unit iron core body, and a flat plate member provided
`with a convex portion for connecting connected to a concave portion
`for connecting provided on an arcuate surface of the unit iron core
`body; wherein both end surfaces of the yoke portion are brought into
`close contact in the circumferential direction by the flat plate member
`and the unit iron core bodies are arranged in a ring shape.
`[Claim 8] The stator for an electric motor according to claim 1 or 7,
`wherein the punched unit iron core is resin-insert laminated by a
`resin insert tool comprising a resin molding die and a jig to form a
`unit iron core body.
`[Claim 9] The stator for an electric motor according to claim 1 or 3,
`wherein, so that the resin-insert laminated unit iron core bodies are
`tightly connected, a resin film is formed of the pole shoe so that the
`angle Q of both end surfaces of the yoke portion where no resin film
`is formed and the angle of both end surfaces of the pole shoe portion
`at the inner surface end are substantially the same angle
`[Claim 10] The stator for an electric motor according to claim 7,
`wherein a convex portion for connecting, to which a concave portion
`
`
`
`-2-
`
`Patent Application 11-341717
`
`for connecting is connected, provided in a resin-insert laminated unit
`iron core body, is provided on a belt-shaped flat plate member such
`as a metal, nonmetal, resin or leather, the connecting portion of the
`unit core body is fixated by an adhesive or welding or the like, and in
`a state of being fixated to the flat plate member, a winding conductor
`is wound around the unit iron core body.
`[Claim 11] The stator for an electric motor according to claim 7,
`wherein an interval L between the convex portions for connecting
`formed on the flat plate member is formed by arranging the convex
`portions for connecting as intervals matching the angle Q of both end
`surfaces of the yoke portion of the unit iron core body.
`[Claim 12] The stator for an electric motor according to claim 1,
`wherein a convex portion for connecting is provided on an arcuate
`surface, having an arcuate outer peripheral surface, provided with a
`yoke portion iron core having an inner periphery formed of a planar
`portion, and a tooth portion iron core having a pole shoe portion
`defining a rotor opposing surface on an inner peripheral end provided
`on the planar portion of this yoke portion iron core, forming the unit
`iron core.
`[Claim 13] A method for manufacturing a stator of an electric motor
`wherein a unit iron core provided with a convex portion for
`connecting on the arcuate outer peripheral surface is laminated in the
`punching step by the method according to claim 5 to manufacture the
`unit iron core body.
`[Claim 14] A method for manufacturing a stator of an electric motor,
`wherein the unit iron core provided with a convex portion for
`connecting on an arcuate outer circumferential surface is laminated in
`a punching process by the method according to claim 6 to
`manufacture a unit iron core body.
`[Claim 15] The stator for an electric motor according to claim 8,
`wherein the unit iron core provided with a convex portion for
`connecting on an arcuate outer peripheral surface is resin-insert
`laminated to form a unit iron core body.
`[Claim 16] The stator for an electric motor according to claim 9,
`wherein the unit iron core provided with a convex portion for
`connecting on an arcuate outer peripheral surface is resin-insert
`laminated to form a unit iron core body.
`[Claim 17] A stator for an electric motor, wherein a notch portion for
`connecting connected with a convex portion for connecting provided
`on a unit iron core body formed by resin-insert laminating a unit iron
`core provided with a convex portion for connecting on an arcuate
`outer peripheral surface is provided on a belt-shaped flat plate
`member such as metal, nonmetal, resin or leather and the like, the
`connecting portion of the unit iron core body is fixated by an
`adhesive or welding or the like, a winding conductor is wound
`around the unit iron core body, and the unit cores are arranged
`annularly.
`[Claim 18] The stator for an electric motor according to claim 17,
`wherein the notch portions formed in the flat plate member are
`disposed in alternating upper and lower staggered fashion.
`[Claim 19] The stator for an electric motor according to claim 17,
`wherein the notch portions formed in the flat plate member are
`provided on a lower surface side.
`[Claim 20] The stator for an electric motor according to claim 7,
`wherein in a resin insert molding of a unit iron core provided with a
`concave portion for connecting on an arcuate outer peripheral surface,
`an insulator for the unit iron core bodies and a flat plate member
`connecting the unit iron core bodies are integrally formed by resin.
`[Claim 21] The stator for an electric motor according to claim 17,
`wherein in resin-insert molding of a unit iron core provided with a
`convex portion for connecting on an arcuate outer peripheral surface,
`an insulator for the unit iron core bodies and a flat plate member
`connecting the unit iron core bodies are integrally formed by resin.
`[Claim 22] The stator for an electric motor according to claim 1,
`wherein a winding conductor is wound around an insert molded unit
`iron core body so as to be connected by a ring with the n units of unit
`iron core pairs as one unit, and the unit iron core bodies are arrayed
`
`Am. Honda v. IV II - IPR2018-00619
`PET_HONDA_1004-0003
`
`

`

`annularly with the position shifted by one unit.
`[Claim 23] The stator for an electric motor according to claim 22,
`providing a fitting hole into which a rib provided on a unit iron core
`body connected to the ring linking the unit iron core bodies is fitted
`while being shifted in position.
`[Claim 24] A method for manufacturing a stator of an electric motor
`wherein a winding conductor is wound around the unit iron core
`body in a state wherein the unit iron core bodies are connected to the
`flat plate member
`[Claim 25] A method for manufacturing a stator of an electric motor
`wherein a molding unit insert-molded so that the unit iron core body
`is connected with a ring with n units as one unit is fitted in the jig A,
`fixated with jig B, and the winding conductor is spindle-wound on
`the unit iron core bodies and sequentially wound.
`[Claim 26] The stator for an electric motor according to claim 1,
`wherein n pieces of unit iron core bodies wound with a winding
`conductor are provided on the flat plate member, and the flat plate
`members are rounded so that both end surfaces of the yoke portion of
`the unit iron core body come into close contact with each other.
`[Claim 27] The stator for an electric motor according to claim 26,
`wherein the flat plate member is connected by welding, deposition or
`an adhesive.
`[Claim 28] The stator for an electric motor according to claim 26,
`wherein the flat plate members are connected by crimping.
`[Claim 29] The stator for an electric motor according to claim 26,
`wherein a connecting portion protruding outward is provided at the
`end portion of the flat plate member, and the connecting portion is
`joined with a matching screw or a rivet.
`[Claim 30] The stator for an electric motor according to claim 26,
`wherein a connecting portion formed with fitting holes of a shape in
`which the connecting pins are fitted is provided at both end portions
`of the flat plate member and is connected.
`[Claim 31] The stator for an electric motor according to claim 1,
`wherein the unit iron core bodies are connected in an annular fashion
`by a ring formed of a shrinkable material.
`[Claim 32] The stator for an electric motor according to claim 1,
`wherein when the unit iron core bodies are arranged in an annular
`fashion, both side surfaces of the tooth portion closely contact each
`other forming the rotor opposing surface on the pole shoe portion.
`[Detailed Description of the Invention]
`[0001]
`[The Technological Field the Invention Relates to] The present
`invention relates to a manufacturing method for a stator for an
`electric motor formed by winding a winding conductor around a unit
`iron core provided with a yoke portion iron core and a tooth, and then
`arranging the unit iron cores in an annular fashion.
`[0002]
`[Prior Art] In recent years, to the end of facilitating the winding work
`for a stator of an electric motor, it has become common practice to
`make a division into a yoke portion constituting an outer periphery,
`and a plurality of tooth portions defining slots; and after winding a
`winding conductor around the tooth portions, the tooth portions are
`connected to the yoke portion. However, there is increasing demand
`for using a unit portion in which the yoke portion and tooth portions
`are integrally formed, to eliminate the need for a high precision in
`connecting the tooth portions to the yoke portion.
`[0003] Conventionally, the stators shown in Figures 35 to 37 have
`been invented as this kind of stator of an electric motor. This
`configuration is described in the following with reference to Figures
`35 to 37.
`
`-3-
`
`Patent Application 11-341717
`
`[0004] As shown in the figure, to constitute the stator of the electric
`motor,
`the outer circumference
`is cylindrical and the
`inner
`circumference is formed into a polygonal surface by a plurality of
`planar portions 101; at the same time as punch-forming from the iron
`core plate the yoke portion iron core 104 provided with the concave
`portion 103 for connecting having the concave side cut portion 102
`for preventing removal in the planar portion 101, having at one end a
`convex portion 105 for connecting to connect the concave portion
`103 provided on the yoke portion iron core 104 on the side within the
`yoke portion iron core 104 as well as a convex notch portion 106 for
`preventing removal; and at the other end forming rotor facing surface
`107 by the pole shoe portion 108, tooth iron core 109 is shifted in
`position in the radial direction concentrically; a plurality thereof are
`arranged in the radial direction, punched in a state of being separated
`from the yoke portion iron core 104; the tooth portion core 109 is
`laminated to a predetermined size; a winding frame 111 for winding
`the winding conductor 110 on the tooth portion 109A is provided;
`winding conductor 110 is wound; and so that the tooth portion 109A
`provided with the winding conductor 110 is connected to the yoke
`portion 104A, the convex portion 105 of the tooth portion 109A is
`connected to the concave portion 103 of the yoke portion 104A.
`[0005]
`[Problems to be Solved by the Invention] In this conventional stator
`for an electric motor, as the tooth 109A and the yoke 104A are
`integrally formed by connecting the convex portions 105 of tooth
`portions 109A with the concave portions 103 of the yoke portions
`104A, a high degree of precision is required in forming the convex
`portions 105 of tooth portions 109A and the concave portions 103 of
`yoke portions 104A, and the cutting area is increased due to
`punching, so that the motor efficiency is impaired, which is
`problematic.
`[0006] Further, because the annular yoke portion iron core 104 and
`the tooth portions 109A are punched out, the material yield is poor,
`the die is complicated, and an extra connecting step is required for
`connecting the tooth portions 109A to the yoke portion 104A.
`the
`[0007] The present
`invention has been made
`to solve
`above-stated problems; the object thereof is to provide a stator for an
`electric motor which does not require a high precision in connecting
`the tooth portions to the yoke portion, and minimizes the cutting area
`to ensure that motor efficiency is not degraded.
`[0008] Another object of the present invention is to provide a method
`for manufacturing a stator of an electric motor that has a good
`material yield, simplifies the die, and eliminates the need for the
`connecting step for connecting the tooth portions to the yoke portion.
`[0009]
`[Means for Solving the Problems] To achieve such objects, the stator
`of an electric motor of the present invention provides a winding
`conductor wound around a tooth portion of a unit core body formed
`by laminating unit iron cores provided with yoke portion iron cores
`formed with an arcuate outer periphery and a flat portion on an inner
`periphery thereof, and a tooth portion iron core provided on the flat
`portion of the yoke portion iron core and having a pole shoe defining
`a rotor opposing surface on an inner periphery thereof; wherein the
`unit iron cores are arranged in an annular fashion so that side end
`surfaces of the yokes closely contact each other.
`[0010] According to the present invention, it is possible to obtain a
`stator for an electric motor which does not require a high precision in
`connecting the tooth portions to the yoke portion, and minimizes the
`cutting area to ensure that motor efficiency is not degraded.
`[0011] To achieve the above objects, the method of manufacturing a
`
`
`
`Am. Honda v. IV II - IPR2018-00619
`PET_HONDA_1004-0004
`
`

`

`stator of an electric motor is a manufacturing method wherein unit
`iron cores, formed with an arcuate outer periphery and a flat portion
`on an inner periphery thereof, provided with a tooth portion iron core
`provided on the flat portion of the yoke portion iron core and having
`a pole shoe defining a rotor opposing surface on an inner peripheral
`end thereof, are punched out in a state in which the direction is
`changed alternately in n columns (n is an integer of 2 or more
`columns) as one unit.
`[0012] According to the present invention, it is possible to obtain a
`method for manufacturing a stator of an electric motor that yields
`good material yield, simplifies the die, and eliminates the need for
`the step of connecting the tooth portions to the yoke portion.
`[0013]
`[Preferred Embodiment(s)] The present invention comprises the
`following: a yoke portion iron core having an arcuate outer
`peripheral surface and a planar portion, and a winding conductor
`wound around a tooth portion of a unit iron core body formed by
`laminating a unit iron core provided with a tooth portion iron core
`having a pole shoe portion defining a rotor opposing surface on an
`inner peripheral end; and has actions wherein the unit iron core
`members are annularly arranged so that both end surfaces of the yoke
`portion come into close contact with each other in the circumferential
`direction, and the yoke portion and the tooth portion are integrally
`formed so that it is not necessary to enhance the connecting precision
`with the tooth portion of the yoke portion, and the cutting area is
`reduced as compared with the case where the yoke portion and the
`tooth portion are separately formed so that a reduction of the
`efficiency of the motor is suppressed.
`[0014] Further, [the present invention] is a manufacturing method
`wherein a unit iron core, provided with a tooth iron core having a
`pole shoe portion defining a rotor opposing surface on an inner
`peripheral end provided on the planar portion of a yoke portion iron
`core formed by an arcuate outer peripheral surface and a planar inner
`periphery; and it has actions wherein it is manufactured by punching
`in a state in which the direction is alternately changed in n rows (n is
`an integer of 2 or more rows) as one unit, there is no need to punch
`out the annular yoke portion iron core, only one type of unit iron core
`can be punched with good yield, the die is also simplified, and the
`yield of the material is improved.
`[0015] Embodiments of the present invention are described in the
`following with reference to Figures 1 to 34.
`[0016]
`[Embodiments] (Embodiment 1) As shown in Figures 1 to 6, in
`punching step 7, the number of unit iron cores 6 to be punched as
`well as that have been punched to become the required height
`dimension, that use a die and a jig in which the direction has been
`alternately changed in n (n is an integer equal to or greater than 2)
`rows, with unit iron core 6 provided with tooth portion iron core 5 on
`planar surface portion 1 of yoke portion iron core 2 formed with an
`arcuate outer periphery and a flat portion on an inner periphery
`thereof, having a pole shoe 4 defining a rotor opposing surface 3 on
`an inner peripheral end thereof, and is pressure-welded, crimped or
`laminated with an adhesive using the pressurizing force of the
`manufacturing equipment to form unit iron core body 8.
`[0017] When an insulator (not shown in the drawings) is provided on
`the unit iron core body 8, and a winding conductor 9 is wound
`around the unit iron core body 8 in the winding step 10, it is wound
`around the tooth portion 12 in a trapezoidal lamination arrangement
`so as to progressively enlarge toward the inner peripheral surface of
`the yoke portion 11 of the unit iron core body 8; and the unit iron
`core body 8 wound with the winding conductor 9 is arranged in
`arranging step 13 so that both end surfaces of the yoke portions 11
`closely contact each other.
`
`-4-
`
`Patent Application 11-341717
`
`[0018] According to this configuration, because the unit iron core
`body 8 is formed so that the yoke portion 11 and the tooth portions
`12 are integrally joined to each other, there is no need for a high
`precision that would be otherwise required for the convex and
`concave portions in connecting the tooth portions 12 to the yoke
`portion 11 in comparison with the case wherein the yoke portion and
`tooth portions are connected using convex and concave portions with
`the tooth portions 12 and yoke portion 11 separately formed, the cut
`area is reduced as compared with the case wherein the yoke portion
`and the tooth portions are separately formed as in the conventional
`case, it is possible to prevent motor efficiency degradation, and the
`need for the step of connecting the tooth portions to the yoke portion
`can be eliminated.
`[0019] Further, as the winding conductor 9 wound around the tooth
`portions 12 is wound in a trapezoidal lamination arrangement so as to
`enlarge toward the inner peripheral surface 1 of the yoke portion 11,
`the winding conductor 9 may have a larger number of turns so that
`the performance of the electric motor can be improved.
`[0020] Since the unit iron cores 6 formed integrally with the yoke
`portion iron core 2 and the tooth portion iron core 5 are punched and
`manufactured in n (integer equal to or greater than 2) rows, the
`material yield is improved as compared to the case where the yoke
`portion iron core 2 and the tooth portion iron core 5 are punched
`separately.
`[0021] Further, when punching the unit iron core 6 as 1 unit, a
`cross-sectional area of the winding portion of the winding conductor
`9 can be increased or reduced by forming the planar portion 1 on the
`inner periphery of the yoke portion iron core 2 so that its position
`shifts toward the outer peripheral side or inner peripheral side, so that
`the unit core 6 can be punched out and the cross-section area of the
`wound portion can be easily changed.
`[0022] In the punching step 7 of the unit iron core 6, the unit iron
`core body 8 may be formed by pressure bonding, crimping or
`laminating by an adhesive
`layer using
`the pressure of
`the
`manufacturing equipment so that the manufacturing cost can be
`minimized.
`[0023] In the punching step 7, either the die and the jig are heated
`and punched out or a heating means is provided before the iron core
`material is inserted into the punching die and the jig and the core
`material is heated, punched out and laminated, so that the peel
`strength of the unit core 6 can be improved.
`[0024] (Second Embodiment) As shown in Figures 7 to 10, a unit
`iron core body 8A is formed in the following manner: a pair of
`concave portions 15 are provided for connecting at intervals to the
`arcuate surface 14 having an arcuate outer peripheral surface, and a
`unit iron core 6A provided with a tooth portion iron core 5 having a
`pole shoe portion 4 defining a rotor opposing surface 3 on an inner
`peripheral end thereof is insertion molded on the planar surface
`portion 1 of yoke portion iron core 2A forming the inner periphery
`by planar surface portion 1. At this time, the angle Q of both end
`faces of the yoke portion 11A and the resin film 17 of the pole shoe
`portion 4 of the inner peripheral end are formed, while resin film 17
`to serve as an insulator is not formed on either end face of the yoke
`portion 11A of the unit core body 8A.
`[0025] By flat plate member 19, wherein winding conductor 9 is
`wound around the unit iron core body 8A formed with the resin film
`17, and convex portion 18, connected to concave portion 15 for
`connecting that is provided on annular surface 14, is provided unit
`iron core body 8A, both end surfaces of the yoke portions 11A hold
`unit iron core body 8A arranged in an annular shape so that both end
`surfaces come
`into close contact with each other
`in
`the
`circumferential direction to form the stator.
`
`
`
`Am. Honda v. IV II - IPR2018-00619
`PET_HONDA_1004-0005
`
`

`

`[0026] In this structure, because the stator is formed by connecting
`convex portion 18 provided on the flat plate member 19 with concave
`portion 15 for connecting provided on the arcuate surface 14 of the
`unit iron core body 8A and holding unit iron core body 8A, the stator
`is firmly held in shape without the risk of causing deformation.
`[0027] Moreover, because the punched unit iron core 6A is insert
`laminated in resin within an insert molding tool 16 constituted of a
`resin molding die and a jig to form unit iron core body 8A, the
`lamination and the insulation of the unit iron core 6A can be
`accomplished in a single step so as to minimize the required labor.
`[0028] Further, because the resin film 17 is formed on the pole shoe
`portion 4 so that an angle Q formed by both end surfaces of the yoke
`portion 11A, which is not formed by resin film 17, is substantially
`equal to an angle formed by both end surfaces of pole shoe 4 of the
`inner peripheral end, so that the resin-insert laminated unit iron core
`bodies 8A are bonded closely to one another, the unit iron core
`bodies 8A can be accurately arranged in an annular fashion.
`[0029] (Embodiment 3) As shown in Figure 11, a flat plate member
`19A made of metallic material, nonmetallic material, resin or leather
`or the like is formed with a pair of projections 18A as a single unit
`for connecting connected with concave portion 15 for connecting
`provided on the formed unit metal core body 8A of resin film 17, as
`the interval wherein the convex portion 18A interval L matches the
`angle Q of both end surfaces of the yoke portion 11A of the unit iron
`core body 8A; concave portion 15 of the unit iron core body 8A is
`connected to convex portion 18A provided on flat plate member 19A,
`the connected portion is fixated with adhesive, welding or the like; a
`winding conductor (not shown in the drawings) is wound around the
`unit iron core bodies 8A in a state where n pieces are fixated to the
`flat plate member 19A, and unit iron core bodies 8A are held in an
`annular arrangement so that both end surfaces of the yoke portions
`11A are brought into close contact with each other by the flat plate
`member 19A to form the stator.
`[0030] In this structure, because the connecting portion of unit iron
`core bodies 8A are fixated with the flat plate member 19A provided
`with convex portions 18A for connecting with the concave portions
`15 for connecting provided on the unit iron core bodies 8A, the
`winding of the winding conductor is facilitated.
`[0031] Moreover, because the interval L between the convex portions
`18A for connecting formed on the flat plate member 19A matches the
`angle Q formed by both end surfaces of the yoke 11A, the unit iron
`cores 8A can be precisely arranged into an annular shape, and firmly
`held.
`[0032] (Embodiment 4) As shown in Figures 12 and 14, when
`arcuate surface 14 having an arcuate outer peripheral surface is
`provided with a convex portion 20 for connecting, planar surface
`portion 1 of yoke portion iron core 2B wherein the inner periphery is
`formed by planar surface portion 1 is provided with tooth portion
`iron core 5 having pole shoe 4 defining rotor opposing surface 3 on
`an inner peripheral end thereof, and punched unit iron core 6B is
`punched out, the die and the jig are heated and punched out, or the
`iron core material is heated by a heating means prior to insertion of
`the iron core material into a punching die and jig; using the pressure
`of the manufacturing equipment, the number of punched unit iron
`cores 6B constituting the necessary height dimension is pressure
`bonded, crimped or laminated with an adhesive layer, unit iron core
`body 8B
`is formed, or unit
`iron core 6B
`is resin-insert
`
`-5-
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`Patent Application 11-341717
`
`laminated within an insert molding tool (not depicted in the
`drawings) constituted of a resin molding die and jig to form unit iron
`core body 8B. At this time, the resin film 17 consisting of insulating
`material is not formed on either end surface of the yoke portion 11B
`of the unit iron core body 8B, while the angle Q of both end surfaces
`of yoke portion 11B and the resin film 17 of pole shoe 4 of the
`circumferential end are formed.
`[0033] Belt-shaped flat plate member 19B made of metallic material,
`nonmetallic material, resin or leather and the like is provided with
`notches 21 for connecting connected with convex portions 20 formed
`on unit iron core bodies 8B, the connecting portions of unit iron core
`bodies 8B are fixated by adhesive, welding and the like, a winding
`conductor (not shown in the drawings) is wound around the unit iron
`core bodies 8B, and the unit iron core bodies 8B annularly arranged
`so that both end surfaces of the yoke portions 11B are brought into
`close contact with o