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公开(公告)号：US20230253852A1
公开(公告)日：2023-08-10
申请号：US18104920
申请日：2023-02-02
Applicant: Nidec Corporation
Inventor： Junya MIZUKAMI
CPC classification number: H02K3/522 , B64D27/24 , H02K2203/06
Abstract: A motor includes a rotor and a stator including a stator core including a core back and teeth, and a coil including a conductor including a wound portion wound around the teeth and an end extending from the wound portion. An axial position of the end is within a range from an end on one side to an end on the other side in an axial direction of the wound portion.
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公开(公告)号：US20230155428A1
公开(公告)日：2023-05-18
申请号：US17915131
申请日：2021-04-23
Applicant: Nidec Corporation
Inventor： Junya MIZUKAMI
Abstract: A stator core of a motor includes a disk portion and a pole-tooth yoke. The disk portion has a disk shape that extends in a radial direction around a central axis extending in a vertical direction. The pole-tooth yoke is located along a radially outer end of the disk portion. The pole-tooth yoke includes an annular portion and a pole tooth. The annular portion is connected to the radially outer end of the disk portion and extends in a circumferential direction. The pole tooth protrudes to one axial side from the annular portion. The disk portion and the pole-tooth yoke are defined by different members.
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公开(公告)号：US20240177736A1
公开(公告)日：2024-05-30
申请号：US18283444
申请日：2022-03-31
Applicant: NIDEC CORPORATION
Inventor： Kazuhiro SATO , Shingo SUGINOBU , Junya MIZUKAMI , Masahiro IMAHORI , Tomoki UCHIBORI , Naoyuki KIMURA
CPC classification number: G11B19/2009 , G11B5/82
Abstract: A spindle motor includes a shaft, a base part, a stator core, a rotor, and a bearing part. The shaft extends along a center axis extending in the vertical direction and has a screw hole extending axially downward from the upper end thereof. The screw hole has a screw part onto which a screw is screwed. The bearing part includes an upper annular member, a lower annular member, and a sleeve. The upper annular member and the lower annular member protrude radially outward from an outer peripheral surface of the shaft and are disposed to be spaced apart from each other in the axial direction. The sleeve covers the outer peripheral surface of the shaft, extends in the axial direction, and is defined in a cylindrical shape. The upper end of the upper annular member is disposed lower than the lower end of the screw part in the axial direction.
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公开(公告)号：US20230066950A1
公开(公告)日：2023-03-02
申请号：US17893175
申请日：2022-08-23
Applicant: NIDEC CORPORATION
Inventor： Junya MIZUKAMI
Abstract: A rotor of a motor includes a cylindrical portion, a first plate portion, a second plate portion, and a side hole. The cylindrical portion is arranged on a radially outer side with respect to the stator and extends in the axial direction. The first plate portion is arranged on a first axial side with respect to the stator, and expands radially inward from a first axial end of the cylindrical portion. The second plate portion is arranged on a second axial side with respect to the stator, and expands radially inward from a second axial end of the cylindrical portion. The side hole penetrates the cylindrical portion in a radial direction. The stator holder has a holder through-hole. The holder through-hole is arranged on the radially inner side with respect to the stator and penetrates the stator holder in the axial direction.
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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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Patent Agency Ranking
公开(公告)号：US20190131858A1
公开(公告)日：2019-05-02
申请号：US16145312
申请日：2018-09-28
Applicant: Nidec Corporation
Inventor： Junya MIZUKAMI
Abstract: A motor includes a stationary portion including a stator, and a rotating portion supported to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion. The rotating portion includes a rotor hub portion extending in an annular shape around the central axis, a magnet including a pole surface radially opposite to the stator, a yoke fixed to a radial outside of the magnet, and connected to the rotor hub portion, a flywheel axially above the rotor hub portion, a first seal portion extending in an annular shape radially outside of the yoke; and a second seal portion extending in an annular shape radially outside of the first seal portion.
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公开(公告)号：US20160053770A1
公开(公告)日：2016-02-25
申请号：US14820678
申请日：2015-08-07
Applicant: Nidec Corporation
Inventor： Junya MIZUKAMI , Hideki NISHIMURA , Yoshito NISHITANI , Michihiro ITO , Naohiro NAGASAWA
IPC: F04D29/22 , F04D29/42 , F04D29/043 , F04D1/00 , F04D13/06
CPC classification number: F04D29/186 , F04D3/00 , F04D5/001 , F04D11/00 , F04D13/0633 , F04D29/0476
Abstract: A pump a shaft portion arranged to extend in a vertical direction; a rotor portion arranged to surround an outer circumference of the shaft portion, and including a magnet; and a housing joined to the shaft portion, and arranged to contain the rotor portion. The housing includes a stator arranged opposite to the magnet; a rotor accommodating portion arranged to accommodate the rotor portion; and an inlet and an outlet each of which is arranged to pass through a portion of the rotor accommodating portion. A surface of at least one of the rotor portion, the shaft portion, and the rotor accommodating portion includes at least one first dynamic pressure groove arranged to support rotation of the rotor portion. A surface of at least one of the rotor portion and the rotor accommodating portion includes at least one second dynamic pressure groove arranged to transfer a fluid from the inlet to the outlet.
Abstract translation: 泵，轴部，其布置成在垂直方向上延伸; 转子部分，其布置成围绕所述轴部分的外圆周，并且包括磁体; 以及与所述轴部接合的壳体，并且设置成容纳所述转子部。 壳体包括与磁体相对布置的定子; 转子容纳部分，其布置成容纳转子部分; 以及各自设置成通过转子容纳部的一部分的入口和出口。 转子部分，轴部分和转子容纳部分中的至少一个的表面包括布置成支撑转子部分的旋转的至少一个第一动压槽。 转子部分和转子容纳部分中的至少一个的表面包括布置成将流体从入口传送到出口的至少一个第二动压槽。
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公开(公告)号：US20150236559A1
公开(公告)日：2015-08-20
申请号：US14524171
申请日：2014-10-27
Applicant: Nidec Corporation
Inventor： Junya MIZUKAMI
CPC classification number: G11B19/2009 , F16C17/107 , F16C2226/40 , G11B19/2036 , H02K1/187 , H02K5/1675 , H02K5/1677 , H02K7/003 , H02K7/086
Abstract: In a motor, a lower thrust portion is defined by a flange portion extending radially outward from an outer circumferential surface of a shaft portion of a shaft and a plate portion extending radially inward from an inner circumferential surface of a cylindrical wall of a bearing cup portion which axially overlap with each other. The flange portion and the plate portion include a first adhesive portion radially opposed thereto and a second adhesive portion axially opposed thereto. An adhesive is located in each of the first adhesive portion and the second adhesive portion such that the shaft and the bearing cup portion have excellent bonding strength to withstand an axial load.
Abstract translation: 在电动机中，下推力部由从轴的轴部的外周面径向向外延伸的凸缘部和从轴承杯部的圆筒壁的内周面径向向内延伸的板部形成 它们彼此轴向重叠。 凸缘部分和板部分包括与其径向相对的第一粘合剂部分和与其轴向相对的第二粘合剂部分。 粘合剂位于第一粘合部分和第二粘合部分中的每一个中，使得轴和轴承杯部分具有优异的粘合强度以承受轴向载荷。
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公开(公告)号：US20240106298A1
公开(公告)日：2024-03-28
申请号：US18369288
申请日：2023-09-18
Applicant: Nidec Corporation
Inventor： Junya MIZUKAMI , Shinya KURAMOTO
CPC classification number: H02K5/1735 , F16C19/08 , H02K7/085 , H02K21/22 , F16C2380/26
Abstract: A motor includes a holder, a rotor inside the holder with a shaft rotatable about a central axis, first and second bearings rotatably supporting the shaft, and a stator radially outside the holder. The holder includes a first holder, and a second holder extending upward from an upper end of the first holder. The stator is fixed to an outer peripheral surface of the first holder, and an outer ring of the first bearing is fixed to a lower end of an inner peripheral surface of the first holder. A portion of an outer ring of the second bearing is fixed to an inner peripheral surface of the second holder. The second holder is radially spaced from the stator core. A radial thickness of the second holder is less than a distance between an outer peripheral surface of the second holder and an inner peripheral surface of the stator core.
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公开(公告)号：US20230064660A1
公开(公告)日：2023-03-02
申请号：US17893176
申请日：2022-08-23
Applicant: NIDEC CORPORATION
Inventor： Junya MIZUKAMI
Abstract: A motor includes a rotor and a stator. The rotor can rotate about a central axis extending in an axial direction. The stator includes a stator core having an annular shape surrounding the central axis. The rotor includes a cylindrical portion, a first plate portion, a second plate portion, and a hole. The cylindrical portion is arranged on a radially outer side with respect to the stator and extends in the axial direction. The first plate portion is arranged on a first axial side with respect to the stator, and expands radially inward from a first axial end of the cylindrical portion. The second plate portion is arranged on a second axial side with respect to the stator, and expands radially inward from a second axial end of the cylindrical portion. The hole penetrates at least one of the cylindrical portion, the first plate portion, and the second plate portion.
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