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公开(公告)号：US11996731B2
公开(公告)日：2024-05-28
申请号：US17285476
申请日：2019-09-05
发明人： Tatsuya Saito , Tomoyuki Ueno , Hijiri Tsuruta , Yuichi Nakamura , Yuka Fukunaga
摘要： A core used in an axial-gap rotating electric device includes an annular back yoke and a plurality of teeth protruding in an axial direction that is perpendicular to a first flat surface of the back yoke. The plurality of teeth are provided on the first flat surface at intervals in a circumferential direction. The back yoke and the teeth are constituted of an integrally-molded powder compact. A first curved section that connects a peripheral surface of each tooth and the first flat surface of the back yoke is provided at a corner between the tooth and the back yoke. The first curved section has a curvature radius ranging between 0.2 mm and 1.5 mm inclusive.
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32.发明公开公开(公告)号：US20240157478A1
公开(公告)日：2024-05-16
申请号：US18281308
申请日：2021-12-23
发明人： Takanori OOTAKI , Hiroaki MOTOYAMA
IPC分类号： B23K26/342 , B22F3/105 , B22F7/06 , B22F7/08 , B22F10/25 , B22F10/28 , B23K103/04 , B33Y10/00 , B33Y70/00 , B33Y80/00 , C21D1/18 , C22C38/04 , C22C38/24 , C22C38/26
CPC分类号： B23K26/342 , B22F3/105 , B22F7/08 , B22F10/25 , B22F10/28 , C21D1/18 , C22C38/04 , C22C38/24 , C22C38/26 , B22F2007/068 , B22F2202/11 , B22F2998/10 , B22F2999/00 , B23K2103/04 , B33Y10/00 , B33Y70/00 , B33Y80/00 , C21D2211/008
摘要： A high-speed steel sintered body includes, a base, a solidified layer continuously disposed on a surface of the base. The base is constituted by high-speed steel, the solidified layer is constituted by high-speed steel whose composition is different from a composition of the high-speed steel constituting the base, and a boundary between the base and the solidified layer is not visually identified in a 200× magnified observation image of a section intersecting the surface.
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公开(公告)号：US11923726B2
公开(公告)日：2024-03-05
申请号：US17273125
申请日：2019-09-05
发明人： Yuuichi Nakamura , Tomoyuki Ueno , Tatsuya Saito
摘要： This stator core is a stator core for a rotating electric machine of an axial gap type and includes a body portion formed by a compaction-molded body of soft magnetic powder whose surfaces are coated with insulating films, wherein the body portion is provided with one or a plurality of through holes.
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公开(公告)号：US11901773B2
公开(公告)日：2024-02-13
申请号：US17272994
申请日：2019-09-05
发明人： Yuuichi Nakamura , Tomoyuki Ueno , Tatsuya Saito
IPC分类号： H02K1/27 , H02K1/28 , H02K1/2795 , H02K1/278 , H02K15/02
CPC分类号： H02K1/2795 , H02K1/278 , H02K1/28 , H02K15/02
摘要： This axial gap motor includes: a stator; and a rotor provided so as to be opposed to the stator in an axial direction. The rotor includes an annular rotor yoke, and a plurality of magnets provided to contact one surface of the rotor yoke so as to be arranged at predetermined intervals along a circumferential direction with magnetic poles thereof being different alternately. The one surface includes a plurality of facing areas facing and contacting the plurality of magnets, and a non-facing area not facing the plurality of magnets. The non-facing area includes partial areas each located between a pair of the facing areas adjacent to each other in the circumferential direction among the plurality of facing areas. The partial areas are formed to be recesses recessed in the axial direction relative to the facing areas.
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公开(公告)号：US11791672B2
公开(公告)日：2023-10-17
申请号：US17414871
申请日：2019-12-13
发明人： Tatsuya Saito , Tomoyuki Ueno , Yuka Fukunaga , Hijiri Tsuruta , Shinichi Hirono
IPC分类号： H02K1/14
CPC分类号： H02K1/148 , H02K2213/03
摘要： A core for use in an axial gap rotating electric machine, the core including: a yoke having an annular plate shape; and a plurality of teeth having a columnar shape arranged at intervals in a circumferential direction of the yoke, wherein the yoke has: an outer-circumferential face; an inner-circumferential face; a first face having a flat shape connecting the outer-circumferential face and the inner-circumferential face to each other; and a plurality of recessed portions connected to the first face, each of the plurality of teeth has an outer-circumferential face protruding in an axial direction of the yoke with respect to the first face, each of the plurality of recessed portions are connected to at least a portion of each one of the plurality of teeth in a circumferential direction of the outer-circumferential face, all shortest distances between at least one of an outer-circumferential edge of the first face and an inner-circumferential edge of the first face and the outer-circumferential faces of the plurality of teeth are 4 mm or less, and the yoke and the plurality of teeth are made of an integrally-molded powder compact.
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公开(公告)号：US11636963B2
公开(公告)日：2023-04-25
申请号：US17256759
申请日：2019-06-18
发明人： Tatsuya Saito , Hijiri Tsuruta , Tomoyuki Ueno
摘要： A method for manufacturing a powder magnetic core, including a step of compacting a raw material powder to form a compact, a step of performing a first heat treatment on the compact to obtain a first heat-treated body, and a step of performing a second heat treatment on the first heat-treated body to obtain a second heat-treated body, wherein the raw material powder contains a soft magnetic powder and a lubricant that has a melting point Tm, the first heat treatment is performed in a temperature range from Tm to Tm+50° C. inclusive for a time longer than 10 minutes, and the second heat treatment is performed in a temperature range from 400° C. to 900° C. inclusive for a time of 3 minutes to 90 minutes inclusive, the temperature range of the second heat treatment being higher than the temperature range of the first heat treatment.
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公开(公告)号：US20230069263A1
公开(公告)日：2023-03-02
申请号：US18049797
申请日：2022-10-26
发明人： Hirofumi KIGUCHI , Daisuke HARIMOTO
摘要： A planetary carrier includes a plurality of plate portions, and column portions connecting the plurality of plate portions. The column portions each have an outer circumferential surface, an inner circumferential surface, and sidewall surfaces. The sidewall surfaces are each formed in a circular arc shape and the circular arc shape has a center on an outer circumferential side in a cross section perpendicular to a shaft of the planetary carrier. An angle formed between the outer circumferential and each of the sidewall surfaces is an obtuse angle and an angle formed between the inner circumferential and each of the sidewall surfaces is an acute angle. The plurality of plate portions and the column portions are integrally formed as one sintered body.
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公开(公告)号：US20220410260A1
公开(公告)日：2022-12-29
申请号：US17929328
申请日：2022-09-02
摘要： A method for manufacturing a sintered component includes a step of making a green compact having a relative density of at least 88% by compression-molding a base powder containing a metal powder into a metallic die, a step of machining a groove part having a groove width of 1.0 mm or less in the green compact by processing groove with a cutting tool, and a step of sintering the green compact in which the groove part is formed after the step of forming the groove part.
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公开(公告)号：US11511360B2
公开(公告)日：2022-11-29
申请号：US16640438
申请日：2018-08-24
发明人： Hirofumi Kiguchi , Daisuke Harimoto
摘要： A machining method for forming an opening through a workpiece, serving as a green compact, by moving a milling tool in a radial direction relative to the workpiece is provided. The milling tool includes a first milling tool and a second milling tool. The method includes a pre-machining step of using the first milling tool, and forming the first sidewall surface by rotating the first milling tool so as to cause cutting edges of the first milling tool to cut the workpiece from the acute angle corner to the obtuse angle corner, while leaving a cutting allowance on the second sidewall surface; and a post-machining step of using the second milling tool whose cutting edges are reversed from the cutting edges of the first milling tool, and forming the second sidewall surface by rotating the second milling tool so as to cause the cutting edges of the second milling tool to cut the cutting allowance from the acute angle corner to the obtuse angle corner.
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公开(公告)号：US20220176448A1
公开(公告)日：2022-06-09
申请号：US17603346
申请日：2019-04-24
发明人： Shin NOGUCHI , Tatsushi YAMAMOTO , Tetsuya HAYASHI
摘要： A manufacturing system according to an aspect of the present disclosure includes: a molding apparatus configured to uniaxially press raw material powder containing metal powder to fabricate a powder compact whose whole or part has a relative density of 93% or more; a robot processing apparatus including an articulated robot configured to machine the powder compact to fabricate a processed molded article; and an induction heating sintering furnace configured to sinter the processed molded article by high frequency induction heating to fabricate a sintered product.
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