公开(公告)号：US20140091679A1

公开(公告)日：2014-04-03

申请号：US13785194

申请日：2013-03-05

Applicant: NIDEC CORPORATION

Inventor： Takuro MATSUMOTO ,  Atsushi YAWATA

IPC: H02K5/16

CPC classification number: H02K5/16 ,  G11B19/2009 ,  H02K1/187 ,  H02K5/1675 ,  H02K2213/03

Abstract: A base unit includes a base member including a first through-hole, a peripheral edge portion, and a thin portion, and a bushing including a bearing holding portion and first and second protrusion portions. The first and second protrusion portions respectively extend radially outward from an upper end portion and a lower end of the bearing holding portion. The first through-hole axially extends through the base member. The first through-hole is defined by an inner surface of the base member radially opposed to the bearing holding portion. The peripheral edge portion extends radially outward from the first through-hole. The thin portion is arranged radially outward of the peripheral edge portion. The thin portion has an axial thickness smaller than that of the peripheral edge portion. The bushing is arranged within the first through-hole. The peripheral edge portion is arranged between the first protrusion portion and the second protrusion portion.

Abstract translation: 基座单元包括：基座构件，包括第一通孔，周缘部分和薄壁部分;以及衬套，其包括轴承保持部分和第一和第二突出部分。 第一突出部分和第二突出部分分别从轴承保持部分的上端部分和下端径向向外延伸。 第一通孔轴向延伸穿过基座构件。 第一通孔由与轴承保持部径向相对的基座的内表面限定。 周边部分从第一通孔径向向外延伸。 薄壁部分沿径向向外设置在周边部分的外侧。 该薄壁部的轴向厚度比周缘部的厚度小。 衬套布置在第一通孔内。 周边部分布置在第一突出部分和第二突出部分之间。

公开(公告)号：US20230077681A1

公开(公告)日：2023-03-16

申请号：US17941311

申请日：2022-09-09

Applicant: Nidec Corporation

Inventor： Atsushi YAWATA ,  Yasuhiro UTSUNOMIYA

IPC: H02K11/215 ,  H02K1/18 ,  H02K21/22

Abstract: A motor includes a stator, a rotor, and a magnetic sensor. The stator includes an annular stator core. The stator core surrounds a central axis extending in an axial direction. The rotor is rotatable about the central axis. The rotor includes a first magnet, a second magnet, and a spacer. The first magnet is outward in a radial direction with respect to the stator core. The second magnet extends in one axial direction with respect to the first magnet and the stator core. The spacer is between the first magnet and the second magnet in the axial direction. The magnetic sensor detects a magnetic force of the second magnet. The spacer is made of a non-magnetic material.

公开(公告)号：US20150085397A1

公开(公告)日：2015-03-26

申请号：US14458413

申请日：2014-08-13

Applicant: Nidec Corporation

Inventor： Atsushi YAWATA

IPC: H02K7/08 ,  G11B19/20

CPC classification number: G11B19/2009 ,  H02K1/2786 ,  H02K5/1675

Abstract: A spindle motor includes a stationary portion and a rotating portion. The stationary portion includes a shaft and the rotating portion includes a sleeve portion, a hub, a magnet, and a cap. The sleeve portion is arranged opposite to the shaft. The hub is made of metal, and includes a top plate portion extending radially outward from the sleeve portion, and an outer tubular portion extending downward from an outer edge of the top plate portion. The magnet is fixed to the outer tubular portion and is arranged opposite to the stator. The cap is made of metal, and includes an annular plate-shaped portion fixed to an upper surface of the top plate portion. The magnet has a coefficient of thermal expansion greater than that of the hub. The cap has a coefficient of thermal expansion greater than that of both the hub and the magnet.

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，旋转部分包括套筒部分，轮毂，磁体和帽盖。 套筒部分布置成与轴相对。 轮毂由金属制成，并且包括从套筒部分径向向外延伸的顶板部分和从顶板部分的外边缘向下延伸的外管状部分。 磁体固定在外管状部分上，与定子相对设置。 盖由金属制成，并且包括固定到顶板部分的上表面的环形板状部分。 磁体的热膨胀系数大于毂的热膨胀系数。 盖的热膨胀系数大于毂和磁体的热膨胀系数。

公开(公告)号：US20130094342A1

公开(公告)日：2013-04-18

申请号：US13705608

申请日：2012-12-05

Applicant: NIDEC CORPORATION

Inventor： Yoichi SEKII ,  Hirokazu SHIRAI ,  Junya MIZUKAMI ,  Kazuyoshi SAITO ,  Hideki NISHIMURA ,  Atsushi YAWATA

IPC: G11B19/20 ,  H02K5/24

CPC classification number: G11B19/2027 ,  G11B19/2009 ,  H02K5/24 ,  H02K7/085 ,  H02K7/09

Abstract: A spindle motor includes a stationary portion and a rotating portion. The rotating portion includes a magnet arranged around a central axis extending in a vertical direction. The stationary portion includes a base member and a magnetic member arranged below the magnet and fixed to the base member. The base member includes an upper surface extending out perpendicularly or substantially perpendicularly to the central axis, and a wall surface extending in an axial direction. The magnetic member includes an annular plate portion arranged on the base member and a projecting portion arranged to extend downward from the plate portion. At least a portion of the projecting portion is arranged to be in contact with the wall surface. An adhesive is arranged between the plate portion and the upper surface of the base member and between the projecting portion and the wall surface.

Abstract translation: 主轴电动机包括固定部分和旋转部分。 旋转部包括围绕在垂直方向延伸的中心轴线布置的磁体。 固定部包括基部构件和布置在磁体下方并固定到基座构件的磁性构件。 基部构件包括垂直于或基本上垂直于中心轴线延伸的上表面和沿轴向方向延伸的壁表面。 磁性构件包括布置在基底构件上的环形板部分和布置成从板部向下延伸的突出部分。 突出部分的至少一部分被布置成与壁表面接触。 粘合剂布置在板部分和基部构件的上表面之间以及突出部分和壁表面之间。