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公开(公告)号：US20180174610A1
公开(公告)日：2018-06-21
申请号：US15795348
申请日：2017-10-27
申请人： Nidec Corporation
CPC分类号： G11B19/2036 , G11B5/012 , G11B19/2009 , G11B33/1446 , G11B33/1486 , H02K3/00 , H02K3/50 , H02K5/22 , H02K5/225 , H02K2205/09
摘要： A spindle motor includes a stationary portion, a rotating portion arranged to rotate about a central axis extending in a vertical direction, and a bearing portion arranged to support the rotating portion such that the rotating portion is rotatable with respect to the stationary portion. The stationary portion includes a stator unit including a plurality of coils arranged in an annular shape with the central axis as a center; a base portion arranged below the stator unit; and a housing arranged to define an interior space in which the rotating portion, the bearing portion, and the stator unit are accommodated. The base portion includes a through hole arranged to pass through the base portion in an axial direction to join an outside of the housing and the interior space to each other; a sheet arranged to cover an upper opening of the through hole to close the through hole; a filler arranged to cover a lower opening of the through hole; and a vent passage defined in at least one of the base portion and the sheet to join the through hole and the interior space to each other. Thus, the filler can be easily put into the through hole.
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公开(公告)号：US20180108377A1
公开(公告)日：2018-04-19
申请号：US15633843
申请日：2017-06-27
申请人： Nidec Corporation
CPC分类号： G11B19/2045 , G11B19/2009 , H02K1/02 , H02K1/27 , H02K1/272 , H02K1/2786 , H02K1/30 , H02K7/14
摘要： This motor is arranged to rotate an annular member, and includes a stationary portion including a stator, and a rotating portion arranged to be rotatable about a central axis extending in a vertical direction. The rotating portion includes a hub arranged to extend in an annular shape around the central axis; a magnet including a pole surface arranged radially opposite to the stator; and a yoke to which the magnet is fixed. The hub includes a hub annular portion in the shape of a circular ring and arranged above the stator, and a flange surface on which the annular member is arranged. The yoke includes a yoke increased thickness portion arranged radially outside of the magnet; and a yoke decreased thickness portion arranged to have a radial thickness smaller than that of the yoke increased thickness portion, and arranged axially above the yoke increased thickness portion. The yoke decreased thickness portion is fixed to the hub annular portion through press fitting.
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公开(公告)号：US20170047097A1
公开(公告)日：2017-02-16
申请号：US15229221
申请日：2016-08-05
申请人： Nidec Corporation
发明人： Mitsuo KODAMA , Hiroyuki ABE , Katsuya TAKAHASHI , Yuya SAITO , Masahiro SHIRAISHI , Yoshinobu ARAO
CPC分类号： G11B33/148 , G11B25/043
摘要： A case of a disk drive apparatus includes a housing in which a disk is accommodated, and a top cover arranged to close an opening of the housing. The top cover includes a top cover body and a flow control member. The top cover body is a plate-shaped member arranged to extend perpendicularly to a central axis. The flow control member is fixed to a lower surface of the top cover body. The flow control member includes a lower surface arranged axially opposite to at least a portion of an upper surface of the disk.
摘要翻译： 磁盘驱动装置的壳体包括容纳盘的壳体和用于封闭壳体的开口的顶盖。 顶盖包括顶盖主体和流动控制构件。 顶盖主体是布置为垂直于中心轴延伸的板状构件。 流量控制构件固定在顶盖主体的下表面。 流动控制构件包括与盘的上表面的至少一部分轴向相对布置的下表面。
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公开(公告)号：US20130120868A1
公开(公告)日：2013-05-16
申请号：US13739415
申请日：2013-01-11
申请人： Nidec Corporation
发明人： Junya MIZUKAMI , Takayuki OE , Yoichi SEKII , Naoki SABASHI , Takehito TAMAOKA , Takashi YAMAMOTO , Shigeki HORIKI , Kazushi MIURA , Mitsuhiro TAKEMOTO , Hironori ANDO , Katsuya TAKAHASHI
CPC分类号： H02K7/08 , F16C17/107 , F16C33/745 , F16C2226/40 , F16C2370/12 , G11B15/00 , G11B19/2036 , G11B25/043 , H02K5/1675
摘要： A motor includes a seal cap and a tubular portion. The seal cap includes a first seal cap lower surface which is an annular surface facing axially downward, and a second seal cap lower surface which is an annular surface facing axially downward and arranged radially outward of the first seal cap lower surface. The tubular portion includes a first tubular portion upper surface which is an annular surface arranged axially opposite to the first seal cap lower surface, and a second tubular portion upper surface which is an annular surface arranged radially outward of the first tubular portion upper surface and in contact with the second seal cap lower surface. The first tubular portion upper surface includes an oil-repellent film region covered with an oil-repellent film. A substantially annular radially extending gap is defined between the first tubular portion upper surface and the first seal cap lower surface.
摘要翻译： 马达包括密封盖和管状部分。 密封盖包括第一密封盖下表面，其是面向轴向向下的环形表面，以及第二密封帽下表面，第二密封帽下表面是面向轴向向下并且布置在第一密封盖下表面的径向外侧的环形表面。 管状部分包括第一管状部分上表面，该第一管状部分上表面是与第一密封帽下表面轴向相对布置的环形表面，以及第二管状部分上表面，其是设置在第一管状部分上表面的径向外侧的环形表面， 与第二密封盖下表面接触。 第一管状部分上表面包括被拒油膜覆盖的拒油膜区域。 在第一管状部分上表面和第一密封帽下表面之间限定基本环形的径向延伸的间隙。
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公开(公告)号：US20190214052A1
公开(公告)日：2019-07-11
申请号：US16192060
申请日：2018-11-15
申请人： Nidec Corporation
发明人： Kazuhiro SATO , Seiji MARUOKA , Katsuya TAKAHASHI
CPC分类号： G11B19/2045 , H02K1/2786 , H02K1/30 , H02K15/03 , H02K2201/03
摘要： A yoke includes a first cylindrical unit held by a radially outside surface of a rotor base, a yoke annular unit extending radially outwardly from an axially lower end of the first cylindrical unit, and a second cylindrical unit extending axially downward from a radially outer end of the yoke annular unit, and a magnet fixed to a radially inside surface of the second cylindrical unit.
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公开(公告)号：US20180315450A1
公开(公告)日：2018-11-01
申请号：US15928184
申请日：2018-03-22
申请人： Nidec Corporation
CPC分类号： G11B19/2036 , F16C17/102 , F16C2380/26
摘要： A fluid bearing apparatus includes a stationary member and a rotating member. A bearing surface of the stationary member and a bearing surface of the rotating member are arranged opposite to each other with a minute gap therebetween. The minute gap has a fluid arranged therein. At least one of the bearing surfaces includes a first dynamic pressure groove array. The first dynamic pressure groove array includes a plurality of first dynamic pressure grooves arranged unevenly at irregular intervals in a circumferential direction.
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公开(公告)号：US20130342934A1
公开(公告)日：2013-12-26
申请号：US13783733
申请日：2013-03-04
申请人： NIDEC CORPORATION
CPC分类号： H02K5/16 , G11B19/2009 , H02K1/187 , H02K3/522 , H02K5/04 , H02K5/1675 , H02K5/225 , H02K2211/03
摘要： A spindle motor arranged to rotate a disk about a center axis extending in an up-down direction includes a rotary unit including a rotor magnet and a stationary unit including a stator opposed to the rotor magnet and a base plate. The base plate includes a flat plate-shaped member positioned around the center axis and made of a first kind of metallic material and a base body axially overlapping with the plate-shaped member and made of a second kind of metallic material. The first kind of metallic material is larger in Young's modulus than the second kind of metallic material. The base body includes a cylindrical or substantially cylindrical bearing attachment portion axially extending about the center axis and a bottom plate portion radially extending from a lower portion of the bearing attachment portion. The plate-shaped member is positioned below the bottom plate portion to contact the bottom plate portion.
摘要翻译： 布置成围绕围绕上下方向延伸的中心轴旋转圆盘的主轴电机包括旋转单元，其包括转子磁体和包括与转子磁体相对的定子和基板的固定单元。 基板包括围绕中心轴定位并由第一种金属材料制成的平板状构件和与板状构件轴向重叠并由第二种金属材料制成的基体。 第一种金属材料的杨氏模量比第二种金属材料大。 基体包括围绕中心轴线延伸的圆柱形或基本圆柱形的轴承附接部分和从轴承附接部分的下部径向延伸的底板部分。 板状构件位于底板部分下方以接触底板部分。
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公开(公告)号：US20200003254A1
公开(公告)日：2020-01-02
申请号：US16402464
申请日：2019-05-03
申请人： Nidec Corporation
发明人： Kazuhiro SATO , Katsuya TAKAHASHI
摘要： A fluid dynamic bearing device includes a shaft disposed along a center axis, a sleeve cylindrically extending around the shaft, a thruster that closes a lower end of the sleeve, dynamic pressure grooves in the shaft or the sleeve, and a lubricating oil present therebetween. The shaft includes a shaft main body and a shaft flange extending radially outward from a lower end of the shaft main body. An inner peripheral surface of the sleeve includes a first inner peripheral surface that faces an outer peripheral surface of the shaft main body in the radial direction and a second inner peripheral surface that faces an outer peripheral surface of the shaft flange in the radial direction. The sleeve includes a sleeve inner lower surface and a circulation hole.
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公开(公告)号：US20190214868A1
公开(公告)日：2019-07-11
申请号：US16192073
申请日：2018-11-15
申请人： Nidec Corporation
发明人： Takuo MIYAKE , Kazuhiro SATO , Katsuya TAKAHASHI
摘要： A protrusion includes a leading end to which a yoke is fixed and a connector that connects an axially lower end of a flange and the leading end. A minimum width of the connector in a direction intersecting a direction in which the protrusion protrudes is smaller than a maximum width of the leading end in a radial direction. A radial position at a radially inner end of the leading end is located radially outward with respect to a side surface in a radially inward direction of a magnet.
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公开(公告)号：US20170287520A1
公开(公告)日：2017-10-05
申请号：US15628886
申请日：2017-06-21
申请人： Nidec Corporation
IPC分类号： G11B19/20
CPC分类号： G11B19/2009 , F16C17/107 , F16C33/1005 , F16C33/723 , F16C33/74 , F16C2370/12 , H02K5/10 , H02K5/15 , H02K5/1677
摘要： A motor includes a rotating portion including a rotor magnet, and arranged to rotate about a central axis extending in a vertical direction; a bearing mechanism arranged to support the rotating portion such that the rotating portion is rotatable about the central axis; a stator portion arranged opposite to the rotor magnet; a housing arranged to accommodate the rotating portion, the bearing mechanism, and the stator portion therein; and a sealing member. The housing includes a base portion substantially in a shape of a plate and arranged to extend radially below the rotating portion. The base portion includes a first lower surface arranged to face downward, and a through hole arranged to pass through the base portion in the vertical direction and arranged to have a portion of the bearing mechanism arranged therein. The sealing member is arranged to cover a lower side of the through hole, and includes at least a metal layer.
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