公开(公告)号：US20160261157A1

公开(公告)日：2016-09-08

申请号：US14692872

申请日：2015-04-22

Applicant: Nidec Corporation

Inventor： Shunichi OCHITANI ,  Wataru YAMAUCHI ,  Masayuki MAEDA

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

CPC classification number: H02K1/30 ,  G11B19/20 ,  G11B19/2009 ,  G11B19/2018 ,  G11B19/2045 ,  G11B25/043 ,  H02K1/2786 ,  H02K15/03 ,  H02K2201/03

Abstract: A rotating portion of a motor includes a magnet, a yoke, and a hub. An upper portion of the yoke is fixed to the hub. The yoke includes a first inner circumferential surface radially opposite to an outer circumferential surface of the magnet with a first gap intervening therebetween, and a second inner circumferential surface radially opposite to the outer circumferential surface of the magnet with a second gap intervening therebetween below the first inner circumferential surface. The second inner circumferential surface is parallel or substantially parallel to the outer circumferential surface of the magnet, and is located radially outward of the first inner circumferential surface. An adhesive is provided in at least a portion of the first gap. No adhesive is provided in at least a lower axial end portion of the second gap.

Abstract translation: 马达的旋转部分包括磁体，磁轭和轮毂。 轭架的上部固定在轮毂上。 磁轭包括与磁体的外周面径向相对的第一内周面，第一内周面与磁体的外周面之间插入第一间隙，第二内周面与磁体的外周面径向相对，第二间隙介于第一内周面之间， 内周面。 第二内周面与磁体的外周面平行或大致平行，并且位于第一内周面的径向外侧。 在第一间隙的至少一部分中提供粘合剂。 在第二间隙的至少下轴向端部没有粘合剂。

公开(公告)号：US20240203450A1

公开(公告)日：2024-06-20

申请号：US18533107

申请日：2023-12-07

Applicant: NIDEC CORPORATION

Inventor： Michihiro ITO ,  Kenta MIYOSHI ,  Takashi MITSUNARI ,  Masayuki MAEDA ,  Naoyuki KIMURA

IPC: G11B5/48 ,  G11B33/02 ,  G11B33/04

CPC classification number: G11B5/4826 ,  G11B33/027 ,  G11B33/0422

Abstract: A disk driving device includes a disk, a motor, an arm, a head, and a housing. The disk rotates about a rotation shaft extending in a vertical direction. The motor causing the disk to rotate. The arm swings about a swinging shaft which is disposed at a position different from the rotation shaft and which extends in the vertical direction. The head is disposed at a tip of the arm and is configured to perform reading or writing of information from or to the disk. The housing accommodates the disk, the motor, the arm, and the head. The housing includes a base plate, a cover, a pivot post, a tubular portion, and a screw. The base plate is a cast product and has a box shape including a bottom wall extending perpendicularly to the rotation shaft and an open top. The cover has a plate shape covering an opening of the base plate. The pivot post is a member separate from the base plate and protrudes upward from a top surface of the bottom wall along the swinging shaft. The tubular portion has a tube shape accommodating the pivot post, and the arm is attached thereto via a bearing disposed on an outer circumference thereof. The screw is inserted into a through-hole provided in the cover and is screwed to a screw hole provided at a top end of the pivot post. The pivot post includes an annular portion in a ring shape protruding in a radial direction from an outer circumferential surface thereof. A top end of the tubular portion is located above the top end of the pivot post and is in contact with a bottom surface of the cover. A bottom end of the tubular portion is disposed on the annular portion.

公开(公告)号：US20160254022A1

公开(公告)日：2016-09-01

申请号：US14934582

申请日：2015-11-06

Applicant: Nidec Corporation

Inventor： Masahiro AKAGI ,  Tomohiro YONEDA ,  Tadahiro KURAMOTO ,  Hiroshi KOBAYASHI ,  Masayuki MAEDA ,  Daisuke MORO

IPC: G11B19/20

CPC classification number: G11B19/2009 ,  G11B19/2036 ,  G11B33/122 ,  G11B33/1446 ,  H02K3/28 ,  H02K3/521

Abstract: A base portion of a motor includes an annular inner bottom plate portion, a recessed portion and groove portions recessed upward from a lower surface of the inner bottom plate portion, and at least one through hole passing through the inner bottom plate portion in an axial direction. The groove portions are arranged to extend from the recessed portion toward land portions of a circuit board arranged on a lower surface of the base portion. A draw-out surface of the recessed portion has a lower opening of each of the at least one through hole defined therein. A wall surface of the recessed portion includes communicating openings each of which is in communication with one end of a separate one of the groove portions. Conducting wires are drawn out from coils arranged above the base portion to the draw-out surface through the at least one through hole, and are passed through the communicating openings and the groove portions to be soldered to the land portions. The recessed portion has a sealant arranged therein. The lower opening of each of the at least one through hole is covered with the sealant. Drawing the conducting wires out of the recessed portion through the groove portions contributes to preventing the sealant arranged in the recessed portion from overflowing toward the land portions.

Abstract translation: 电动机的基部包括环形内底板部分，凹部和从内底板部分的下表面向上凹陷的凹槽部分，以及至少一个贯穿内底板部分的轴向方向的通孔 。 凹槽部分被布置成从设置在基部的下表面上的电路板的凹部朝向陆部延伸。 凹陷部分的拉出表面具有限定在其中的至少一个通孔中的每一个的下开口。 凹部的壁面包括连通开口，每个连通孔与单独的一个槽部的一端连通。 导线从通过至少一个通孔的基部上方的线圈被引出到拉出面，并且通过连通开口和沟槽部分被焊接到陆部。 凹部具有布置在其中的密封剂。 所述至少一个通孔中的每一个的下开口被所述密封剂覆盖。 通过槽部将导线从凹部拉出，有助于防止配置在凹部中的密封剂朝着陆部溢出。