公开(公告)号：US20190080715A1

公开(公告)日：2019-03-14

申请号：US16028458

申请日：2018-07-06

Applicant: Nidec Corporation

Inventor： Shingo SUGINOBU ,  Takumi SHIMOMURA ,  Masahiro IMAHORI

IPC: G11B19/20 ,  H02K5/22 ,  H02K5/16

CPC classification number: G11B19/2036 ,  G11B25/043 ,  G11B33/122 ,  G11B33/123 ,  G11B33/1466 ,  G11B33/148 ,  H02K5/16 ,  H02K5/163 ,  H02K5/225 ,  H02K21/22

Abstract: Provided is a base unit for use in a disk drive apparatus including a motor arranged to be capable of rotating about a central axis extending in a vertical direction. The base unit includes a base member arranged to extend radially to support the motor, and including a predetermined adhesion region and an outside region outside of the adhesion region; and a connector electrically connected to a wire arranged on the base member. The connector is adhered to the base member through an adhesive at the adhesion region of the base member. A wettability of the adhesive on the adhesion region is higher than a wettability of the adhesive on the outside region of the base member.

公开(公告)号：US20220319547A1

公开(公告)日：2022-10-06

申请号：US17711039

申请日：2022-04-01

Applicant: NIDEC CORPORATION

Inventor： Kazuhiro SATO ,  Masahiro IMAHORI ,  Junya MIZUKAMI ,  Shingo SUGINOBU ,  Tomoki UCHIBORI

IPC: G11B25/04 ,  G11B19/20

Abstract: A spindle motor includes a base, a shaft arranged on the base and extending in a vertical direction, a stator having a coil defined by a wound conductive wire and arranged on an upper surface of the base, and a rotor rotatably supported around the shaft. The base has a through hole that penetrates the base from the upper surface to a lower surface. The conductive wire is drawn out to the lower surface side through the inside of the through hole. The through hole is sealed by a sealing material. The through hole includes a columnar lower column body and a columnar upper column body. The lower column body is arranged on the lower surface side of the base. A cross-sectional area of the upper column body orthogonal to an axial direction is smaller than a cross-sectional area of the lower column body orthogonal to the axial direction.

公开(公告)号：US20240379122A1

公开(公告)日：2024-11-14

申请号：US18657797

申请日：2024-05-08

Applicant: NIDEC CORPORATION

Inventor： Genya ITAGAKI ,  Kenta MIYOSHI ,  Michihiro ITO ,  Takashi MITSUNARI ,  Ryo FURUYA ,  Seiji MARUOKA ,  Masahiro IMAHORI

IPC: G11B19/20

Abstract: A base plate becomes a part of a housing of a disk drive device and is made of a metal die-cast member. The base plate includes a bottom wall portion and a cylindrical wall portion. The bottom wall portion extends perpendicular to a rotation axis of a disk extending in a vertical direction. The cylindrical wall portion protrudes upward from an upper surface of the bottom wall portion along the rotation axis and has a shaft through hole through which a shaft is inserted. The cylindrical wall portion has an annular stepped portion that protrudes radially outward from an outer peripheral surface of a root portion. A processed surface is formed on at least a part of an outer peripheral surface of the stepped portion.

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

IPC: G11B19/20 ,  G11B5/82

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.

公开(公告)号：US20230018843A1

公开(公告)日：2023-01-19

申请号：US17865366

申请日：2022-07-14

Applicant: NIDEC CORPORATION

Inventor： Masahiro IMAHORI ,  Kazuhiro SATO ,  Tomoki UCHIBORI

IPC: H02K5/167 ,  H01L35/30 ,  H02K7/00 ,  H02K7/08 ,  H02K21/22 ,  G11B17/02

Abstract: A motor includes a shaft, a base, a stator, a rotor, a bearing, and at least one or more temperature adjusters. The shaft extends along a central axis extending in an axial direction. The base extends in a radial direction from an end of the shaft in an axially one direction. The stator has an annular shape surrounding the shaft, and is disposed further in an axially other direction than the base. The rotor is rotatable about the central axis. The bearing rotatably supports the rotor. The temperature adjuster adjusts an ambient temperature of the bearing. The shaft has a shaft hole recessed in the axial direction from an axial end of the shaft. The temperature adjuster is disposed in the shaft hole and overlaps at least a portion of the bearing as viewed in the radial direction.

公开(公告)号：US20180315450A1

公开(公告)日：2018-11-01

申请号：US15928184

申请日：2018-03-22

Applicant: Nidec Corporation

Inventor： Takumi SHIMOMURA ,  Masahiro IMAHORI ,  Shingo SUGINOBU ,  Katsuya TAKAHASHI

IPC: G11B19/20 ,  F16C17/10

CPC classification number: G11B19/2036 ,  F16C17/102 ,  F16C2380/26

Abstract: 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.