公开(公告)号：US20160293204A1

公开(公告)日：2016-10-06

申请号：US14963297

申请日：2015-12-09

Applicant: Nidec Corporation

Inventor： Seiji MARUOKA ,  Hironori ANDO ,  Yuki TAJIMA ,  Takahiro HISADA ,  Yoshitsugu SASAGURI

IPC: G11B19/20 ,  H02K5/16

CPC classification number: G11B19/2009 ,  F16C17/10 ,  F16C17/102 ,  F16C17/107 ,  F16C33/106 ,  F16C33/1065 ,  F16C33/107 ,  F16C35/10 ,  F16C35/12 ,  F16C2370/12 ,  H02K5/1677

Abstract: {circle around (1)} A spindle motor includes a fixing portion defined by a bearing portion, a holder portion, a gap between the bearing portion and the holder portion, and an adhesive arranged in the gap. {circle around (2)} The fixing portion includes first and second protruding surfaces arranged to protrude radially from a first and a second one, respectively, of an outside surface of the bearing portion and an inside surface of the holder portion; and first and second boundary surfaces arranged to join the first and second surfaces, respectively, to the first and second protruding surfaces, respectively. {circle around (3)} At least a portion of the first boundary surface is arranged above the second boundary surface. {circle around (4)} The first and second protruding surfaces are arranged radially opposite to the second and first surfaces, respectively, with a first and a second gap, respectively, intervening therebetween. {circle around (5)} The first boundary surface is arranged opposite to the second boundary surface with a third gap intervening therebetween. {circle around (6)} The adhesive is arranged to extend from the third gap to at least a portion of each of the first and second gaps.

Abstract translation: {圆周（1）}主轴电动机包括由轴承部分，保持器部分，轴承部分和保持器部分之间的间隙以及布置在间隙中的粘合剂限定的固定部分。 {圆周（2）}固定部分包括分别从轴承部分的外表面和保持器部分的内表面的第一和第二突出部径向突出的第一和第二突出表面; 以及分别将第一和第二表面分别连接到第一和第二突出表面的第一和第二边界面。 {圆周（3）}第一边界表面的至少一部分布置在第二边界表面上方。 {圆周（4）}第一和第二突出表面分别与第二和第一表面径向相对设置，分别具有介于其间的第一和第二间隙。 {圆周（5）}第一边界面与第二边界面相对布置，其间插入第三间隙。 {圆周围（6）}粘合剂布置成从第三间隙延伸到第一和第二间隙中的每一个的至少一部分。

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：US20190214052A1

公开(公告)日：2019-07-11

申请号：US16192060

申请日：2018-11-15

Applicant: Nidec Corporation

Inventor： Kazuhiro SATO ,  Seiji MARUOKA ,  Katsuya TAKAHASHI

IPC: G11B19/20 ,  H02K1/27 ,  H02K1/30 ,  H02K15/03

CPC classification number: G11B19/2045 ,  H02K1/2786 ,  H02K1/30 ,  H02K15/03 ,  H02K2201/03

Abstract: 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.

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

IPC: H02K7/00 ,  H02K5/10 ,  H02K5/167 ,  H02K7/08 ,  H02K21/22 ,  G11B19/20 ,  F16C17/02

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.