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公开(公告)号：US20250038597A1
公开(公告)日：2025-01-30
申请号：US18779431
申请日：2024-07-22
Applicant: NIDEC CORPORATION
Inventor： Mitsuhiro TAKEMOTO , Masahiro SHIRAISHI
IPC: H02K1/2791 , H02K1/30 , H02K15/03 , H02K21/22
Abstract: A rotor rotatable about a central axis extending in an axial direction includes a yoke that is a cylindrical magnetic body extending in the axial direction. A plurality of ridge portions of the yoke are connected to one axial end of the yoke cylindrical portion in a cylindrical shape and extending in the axial direction, and are arranged at intervals in the circumferential direction. In each ridge portion, a protrusion protrudes radially inward from one axial end of the yoke cylindrical portion. Further, an extension extends in the other axial direction from the radially inner end of the protrusion along the radially inner surface of the yoke cylindrical portion. A magnet is located between the extensions adjacent to each other in the circumferential direction. The ridge portion is integral with the yoke cylindrical portion to define a single structure.
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公开(公告)号：US20220399773A1
公开(公告)日：2022-12-15
申请号：US17839487
申请日：2022-06-14
Applicant: NIDEC CORPORATION
Inventor： Mitsuhiro TAKEMOTO , Shinji TAKEMOTO
Abstract: A motor includes: a rotor including a shaft rotatable about an axis extending in a vertical direction; a bearing rotatably supporting the shaft; a stationary portion including a stator; and a lead wire electrically connected to the stator. The stationary portion includes a housing located radially outward of the bearing and radially inward of the stator, and supporting the bearing and the stator, a base portion which is located axially below the stator and to which the housing is fixed, and a fixing member fixed to the base portion. The fixing member includes a cover portion covering a shaft lower end portion located at an axially lower end of the shaft when viewed from axially below. The cover portion has an opening portion that opens in an axial direction. The opening portion is located radially more inside than an inner peripheral surface of the shaft when viewed from axially below.
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公开(公告)号：US20210036584A1
公开(公告)日：2021-02-04
申请号：US16934050
申请日：2020-07-21
Applicant: Nidec Corporation
Inventor： Mitsuhiro TAKEMOTO , Sho FUKUHARA , Shinji TAKEMOTO
Abstract: A motor includes a rotor rotatable about a center axis extending vertically, a stator radially opposing the rotor, a bracket holding the stator, a circuit board including an upper surface with a first wiring pattern and a lower surface with a second wiring pattern, and a first fixing portion having conductivity and fixing the circuit board to the stator. The stator includes a stator core having conductivity. The first fixing portion includes a board holding portion holding the circuit board, and a stator fixed portion fixed to a portion of the stator core. The board holding portion is in contact with the first wiring pattern and the second wiring pattern.
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公开(公告)号：US20190165644A1
公开(公告)日：2019-05-30
申请号：US16174288
申请日：2018-10-30
Applicant: NIDEC CORPORATION
Inventor： Seiji MARUOKA , Mitsuhiro TAKEMOTO
CPC classification number: H02K7/003 , F16C17/02 , F16C2370/12 , F16C2380/26 , G11B19/2036 , H02K5/10 , H02K5/1677 , H02K7/086 , H02K21/22
Abstract: A rotating portion includes a hollow shaft extending along a central axis. The hollow shaft includes a through hole passing therethrough in an axial direction. The rotating portion includes an upper screw to close an upper opening that is an opening at an upper end portion of the through hole. The rotating portion includes a lower screw to close a lower opening that is an opening at a lower end portion of the through hole. The hollow shaft includes an upper groove portion into which the upper screw is screwed at the upper opening. The hollow shaft includes a lower groove portion into which the lower screw is screwed at the lower opening. A lubricating oil is in contact with the lower screw. The lower groove portion is shorter in axial length than the upper groove portion, and the lower screw is smaller in axial pitch than the upper screw.
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公开(公告)号：US20160190875A1
公开(公告)日：2016-06-30
申请号：US14690587
申请日：2015-04-20
Applicant: Nidec Corporation
Inventor： Mitsuhiro TAKEMOTO , Tsuchitsugu WATANABE , Hiroyuki ABE
CPC classification number: G11B19/2009 , G11B19/20 , H02K1/187
Abstract: A stationary portion of a spindle motor includes a stator portion and an outside surface. The stator portion includes a stator core and coils. The outside surface extends in an axial direction parallel or substantially parallel to a central axis, and is centered on the central axis. The spindle motor includes a fixing portion at which an inside surface of the stator core and the outside surface are fixed to each other. The fixing portion includes a first press fit portion, a second press fit portion, and a gap arranged therein. The gap is located between the first press fit portion and the second press fit portion. The second press fit portion is located above the first press fit portion. At least a portion of the second press fit portion is located above a middle of the stator core in the axial direction.
Abstract translation: 主轴电动机的固定部分包括定子部分和外表面。 定子部分包括定子芯和线圈。 外表面沿着平行于或基本上平行于中心轴线的轴向方向延伸，并且在中心轴线上居中。 主轴电动机包括定子铁心的内表面和外表面彼此固定的固定部分。 固定部分包括第一压配合部分，第二压配合部分和布置在其中的间隙。 间隙位于第一压配合部分和第二压配合部分之间。 第二压配合部分位于第一压配合部分的上方。 第二压配合部的至少一部分位于定子芯的中心的轴向的上方。
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Patent Agency Ranking
公开(公告)号：US20130128379A1
公开(公告)日：2013-05-23
申请号：US13739402
申请日：2013-01-11
Applicant: Nidec Corporation
Inventor： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Takehito TAMAOKA , Takashi YAMAMOTO , Shigeki HORIKI , Kazushi MIURA , Mitsuhiro TAKEMOTO , Kazuhiro SATO
CPC classification number: H02K7/08 , F16C17/107 , F16C33/1065 , F16C33/107 , F16C33/745 , F16C2202/60 , F16C2370/12 , G11B19/00 , G11B19/2036 , G11B25/043 , H02K5/1675
Abstract: A motor includes a stationary portion and a rotating portion. The stationary portion includes a shaft portion and an upper thrust portion. The upper thrust portion includes a tubular first outer circumferential surface arranged radially outside the upper thrust portion, and a tubular second outer circumferential surface arranged above the first outer circumferential surface. The rotating portion includes a sleeve portion, a tubular portion, and an annular cover portion. The annular cover portion includes a plate portion and an inner annular projecting portion arranged to project upward or downward. An inner circumferential surface of the inner annular projecting portion is arranged above an inner circumferential surface of the tubular portion. An upper seal portion includes a surface of a lubricating oil located therein. The inner circumferential surface of the inner annular projecting portion and the second outer circumferential surface are arranged opposite to each other with an axially extending gap therebetween.
Abstract translation: 电动机包括固定部分和旋转部分。 固定部分包括轴部分和上推力部分。 上推力部包括设置在上推力部的径向外侧的管状的第一外周面和配置在第一外周面的上方的管状的第二外周面。 旋转部分包括套筒部分，管状部分和环形盖部分。 环形盖部分包括板部分和布置成向上或向下突出的内环形突出部分。 内环形突出部的内周面设置在管状部的内周面的上方。 上密封部分包括位于其中的润滑油的表面。 内环形突出部和第二外周面的内周面彼此相对设置，在其间具有轴向延伸的间隙。
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公开(公告)号：US20250132627A1
公开(公告)日：2025-04-24
申请号：US18915883
申请日：2024-10-15
Applicant: NIDEC CORPORATION
Inventor： Mitsuhiro TAKEMOTO , Kenji FUKAMI , Masahiro SHIRAISHI
Abstract: A motor includes a rotor rotatable about a central axis extending in an axial direction, a stator including coil assemblies arranged in a circumferential direction, and a bus bar assembly including a bus bar to electrically connect end portions of the coil assemblies to each other. A rotor recessed portion recessed in the axial direction is defined in the rotor, and at least a portion of the bus bar is accommodated in the rotor recessed portion.
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公开(公告)号：US20220006341A1
公开(公告)日：2022-01-06
申请号：US17280430
申请日：2019-09-26
Applicant: Nidec Corporation
Inventor： Shinji TAKEMOTO , Tomoya UEDA , Mitsuhiro TAKEMOTO , Yusuke ISOGAI
Abstract: A rotor used in an outer rotor motor includes a rotor holder in a tubular shape extending along a center axis, a rotor core in a tubular shape extending in an axial direction and being fixed to a surface of the rotor holder, directed radially inward, and permanent magnets bonded to an inner circumferential surface of the rotor core and side by side in a circumferential direction. The rotor core includes projection portions projecting radially inward from the inner circumferential surface of the rotor core. One or more of the projection portions are in a gap between the permanent magnets adjacent to each other in the circumferential direction. Each of the projection portions has an axial length shorter than an axial length of each of the permanent magnets.
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公开(公告)号：US20210036563A1
公开(公告)日：2021-02-04
申请号：US16934051
申请日：2020-07-21
Applicant: Nidec Corporation
Inventor： Mitsuhiro TAKEMOTO , Sho FUKUHARA , Shinji TAKEMOTO
Abstract: A motor includes a rotor with one or more magnets, a rotor core holding the one or more magnets, a spacer that contacts the one or more magnets, and a rotor holder. The rotor holder includes a holder lid portion and a holder tubular portion in a tubular shape extending to one side in the axial direction from a radially outer edge of the holder lid portion. The holder lid portion includes a holder first surface that extends radially inward from an inner surface of the holder tubular portion, a holder second surface that extends radially and is radially inward of the holder first surface and on the other side in the axial direction, and a connecting surface connecting the holder first surface and the holder second surface.
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公开(公告)号：US20150055247A1
公开(公告)日：2015-02-26
申请号：US14330207
申请日：2014-07-14
Applicant: Nidec Corporation
Inventor： Hironori ANDO , Mitsuhiro TAKEMOTO
CPC classification number: H02K7/086 , F16C17/107 , F16C33/745 , F16C43/02 , F16C2370/12 , G11B19/2009
Abstract: A spindle motor includes a stationary portion and a rotating portion. The stationary portion includes a shaft, a first cup portion. The first cup portion includes a circular plate member and an annular member. The rotating portion includes an annular concave portion that accommodates at least a lower end portion of the annular member. A lubricant is interposed in a gap between a surface of a stationary portion and a surface of the rotating portion. The shaft, the rotating portion, and the lubricant define a fluid dynamic pressure bearing. A connection gap that reaches an inner side of the first cup portion from an outer circumferential surface of the first cup portion is configured between the circular plate member and the annular member. At least a portion of the connection gap is filled with an adhesive.
Abstract translation: 主轴电动机包括固定部分和旋转部分。 固定部分包括轴，第一杯部分。 第一杯部包括圆板构件和环形构件。 旋转部分包括容纳环形构件的至少下端部的环形凹部。 在固定部分的表面和旋转部分的表面之间的间隙中插入润滑剂。 轴，旋转部分和润滑剂限定流体动压轴承。 从第一杯部的外周面到达第一杯部的内侧的连接间隙构造在圆板部件与环状部件之间。 连接间隙的至少一部分用粘合剂填充。
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