公开(公告)号：US20140334035A1

公开(公告)日：2014-11-13

申请号：US14444146

申请日：2014-07-28

Applicant: Nidec Corporation

Inventor： Shuji IWASAKI ,  Yoichi SEKII ,  Takehito TAMAOKA ,  Hideki NISHIMURA ,  Kazuto MIYAJIMA ,  Takuro IGUCHI ,  Kazuhiro SATO ,  Takeyuki SHUTO

IPC: H02K5/16 ,  H02K7/08 ,  G11B19/20

CPC classification number: H02K5/165 ,  F16C17/107 ,  F16C33/103 ,  F16C33/107 ,  F16C33/745 ,  F16C2226/12 ,  F16C2226/40 ,  F16C2226/60 ,  F16C2370/12 ,  G11B19/2036 ,  H02K5/1677 ,  H02K7/086

Abstract: A motor includes a rotating portion including a sleeve portion and a stationary portion. The stationary portion includes a shaft component which includes an inner shaft portion and an outer shaft portion. A radial dynamic pressure generating groove array is provided on at least one surface of an inner circumferential surface of the sleeve portion and an outer circumferential surface of the outer shaft portion, which define the radial gap. The radial dynamic pressure generating groove array includes an upper radial dynamic pressure generating groove array and a lower radial dynamic pressure generating groove array. A range of a fixing region in an axial direction between the inner shaft portion and the outer shaft portion in an interference fit state is included in a range between the upper radial dynamic pressure generating groove array and the lower radial dynamic pressure generating groove array.

Abstract translation: 马达包括具有套筒部和固定部的旋转部。 固定部包括轴部，该轴部包括内轴部和外轴部。 径向动压产生槽阵列设置在套筒部分的内圆周表面的至少一个表面和限定径向间隙的外轴部分的外圆周表面上。 径向动压产生槽阵列包括上径向动压产生凹槽阵列和下径向动压产生凹槽阵列。 在上部径向动态压力产生槽阵列和下部径向动态压力产生槽阵列之间的范围内包括在干涉配合状态下在内轴部和外轴部之间沿轴向方向的固定区域的范围。

公开(公告)号：US20140078879A1

公开(公告)日：2014-03-20

申请号：US13789796

申请日：2013-03-08

Applicant: NIDEC CORPORATION

Inventor： Yoichi SEKII ,  Hiroshi KONNO ,  Chiharu FUJII ,  Takuro IGUCHI ,  Shuji IWASAKI

IPC: F16C17/10 ,  G11B19/20 ,  H02K5/16

CPC classification number: F16C17/107 ,  F16C33/1085 ,  F16C33/745 ,  F16C2370/12 ,  G11B19/2036 ,  H02K5/165 ,  H02K5/1677

Abstract: A bearing apparatus includes a stationary shaft, an upper annular portion, a lower annular portion, and a sleeve. An outer circumferential surface of the upper annular portion includes a cylindrical surface and an inclined surface arranged above the cylindrical surface. The cylindrical surface has an axial length smaller than that of the inclined surface of the upper annular portion. One of an upper surface of the sleeve and a lower surface of the upper annular portion includes a pumping groove array defined therein. An upper surface of a lubricating oil is defined in an upper capillary seal portion, while a lower surface of the lubricating oil is defined in a lower capillary seal portion. The upper capillary seal portion has an opening angle larger than that of the lower capillary seal portion.

Abstract translation: 轴承装置包括固定轴，上环形部分，下环形部分和套筒。 上环形部分的外圆周表面包括圆柱形表面和布置在圆柱形表面上方的倾斜表面。 圆柱形表面的轴向长度小于上部环形部分的倾斜表面的轴向长度。 套筒的上表面和上环形部分的下表面之一包括限定在其中的泵浦槽阵列。 润滑油的上表面限定在上毛细管密封部分中，而润滑油的下表面限定在下毛细密封部分中。 上部毛细管密封部分具有比下部毛细管密封部分大的开启角度。

公开(公告)号：US20140016229A1

公开(公告)日：2014-01-16

申请号：US13767205

申请日：2013-02-14

Applicant: NIDEC CORPORATION

Inventor： Yoichi SEKII ,  Shuji IWASAKI

IPC: H02K5/16 ,  G11B19/20

CPC classification number: H02K5/165 ,  F16C17/107 ,  F16C33/745 ,  F16C2370/12 ,  G11B19/2009 ,  G11B19/2036 ,  H02K5/1677

Abstract: A stationary portion of a motor includes a shaft component, an upper plate portion, and a lower plate portion. A rotating portion includes a sleeve portion which is disposed between the upper plate portion and the lower plate portion. The shaft component includes an inner shaft upper portion, an inner shaft lower portion which is located in a lower side of the inner shaft upper portion, and an outer shaft portion. The outer shaft portion is located on an outer circumferential surface of the inner shaft upper portion and an outer circumferential surface of the inner shaft lower portion. The inner shaft upper portion and the upper plate portion are preferably defined by a single monolithic member, and the inner shaft lower portion and the lower plate portion are preferably defined by a single monolithic member.

Abstract translation: 电动机的固定部分包括轴部件，上板部分和下板部分。 旋转部分包括设置在上板部分和下板部分之间的套筒部分。 轴部件包括内轴上部，位于内轴上部下侧的内轴下部和外轴部。 外轴部位于内轴上部的外周面和内轴下部的外周面。 内轴上部和上板部分优选地由单个整体构件限定，并且内轴下部分和下部板部分优选地由单个整体构件限定。