公开(公告)号：US20150055246A1

公开(公告)日：2015-02-26

申请号：US14267032

申请日：2014-05-01

申请人： NIDEC CORPORATION

发明人： Akinobu SUMIJI

IPC分类号： H02K7/08 ,  G11B19/20

CPC分类号： H02K7/086 ,  F16C17/105 ,  F16C33/107 ,  F16C2240/34 ,  F16C2240/40 ,  F16C2240/70 ,  F16C2370/12 ,  G11B19/2009 ,  G11B19/2036 ,  H02K7/083

摘要： A spindle motor includes an upper bearing portion and a lower bearing portion each of which is inclined with respect to a central axis. The upper bearing portion includes an upper dynamic pressure generating groove defined in at least one of an upper outer circumferential surface of a shaft portion and an upper inner circumferential surface of a sleeve. The lower bearing portion includes a lower dynamic pressure generating groove defined in at least one of a lower outer circumferential surface of the shaft portion and a lower inner circumferential surface of the sleeve. The radial distance between a lower end portion of the upper dynamic pressure generating groove and the central axis is shorter than the radial distance between an upper end portion of the lower dynamic pressure generating groove and the central axis.

摘要翻译： 主轴电动机包括上轴承部分和下轴承部分，每个轴承部分相对于中心轴线倾斜。 上轴承部分包括限定在轴部的上外周表面和套筒的上内周表面中的至少一个中的上动压产生槽。 下轴承部分包括限定在轴部的下外周表面和套筒的下内周表面中的至少一个中的下动压产生槽。 上动压产生槽的下端部与中心轴之间的径向距离比下动压产生槽的上端部与中心轴之间的径向距离短。

公开(公告)号：US20190195232A1

公开(公告)日：2019-06-27

申请号：US16157141

申请日：2018-10-11

申请人： Nidec Corporation

发明人： Kunio SAKURADA ,  Hiroshi MORISHITA ,  Akinobu SUMIJI ,  Hirotaka TAMEKUNI

IPC分类号： F04D29/00 ,  F04D19/00 ,  F04D25/06 ,  F04D29/52 ,  F04D29/32 ,  F04D29/08 ,  F16C32/06 ,  H02K5/167 ,  H02K7/08 ,  H02K7/14 ,  H02K21/22

CPC分类号： F04D29/002 ,  F04D19/002 ,  F04D25/0606 ,  F04D25/08 ,  F04D29/083 ,  F04D29/329 ,  F04D29/526 ,  F16C32/0614 ,  F16C2360/46 ,  H02K5/167 ,  H02K7/08 ,  H02K7/14 ,  H02K21/22

摘要： A blower includes an impeller that is rotatable about a central axis extending in a vertical direction, a motor that rotates the impeller, and a base portion on which the motor is mounted. The impeller includes a cup portion that covers the motor, and blades extending radially outward from the cup portion and arranged in a circumferential direction. A gap is provided between the cup portion and the base portion such that the gap becomes narrower in an outward direction with increasing distance from an interior of the cup portion.

公开(公告)号：US20130321946A1

公开(公告)日：2013-12-05

申请号：US13775475

申请日：2013-02-25

申请人： NIDEC CORPORATION

发明人： Akihiro KIMURA ,  Akinobu SUMIJI ,  Kunio SAKURADA ,  Daisuke FUKUOKA ,  Akihisa MORIGUCHI

IPC分类号： F16C32/06 ,  H02K5/16

CPC分类号： F16C32/0633 ,  F16C17/107 ,  F16C33/107 ,  F16C33/1085 ,  F16C33/745 ,  F16C2370/12 ,  H02K5/165 ,  H02K5/1675

摘要： A bearing mechanism includes a shaft portion, a sleeve portion, and an opposing portion including a surface arranged opposite to an end surface of the sleeve portion on one of upper and lower sides with a thrust gap defined therebetween. The thrust gap includes a thrust dynamic pressure bearing portion defined therein. The sleeve portion includes a sleeve body and a thrust plate fixed to an end portion of the sleeve body on the one of the upper and lower sides. The sleeve body includes an annular surface arranged opposite to the thrust plate, and an annular body projecting portion arranged to project in an axial direction inside of the annular surface. An outer circumferential surface of the body projecting portion and an inner circumferential surface of the thrust plate are arranged to be in direct or indirect contact with each other.

摘要翻译： 轴承机构包括轴部，套筒部和相对部，该相对部包括在上下两侧之一上与套筒部的端面相对配置的面，其间限定有推力间隙。 推力间隙包括限定在其中的推力动压轴承部分。 套筒部分包括一个套筒本体和一个止推板，该推力板固定在该套筒本体的上侧和下侧之一的端部上。 套筒主体包括与止推板相对布置的环形表面，以及环形体突出部分，其设置成沿着轴向在环形表面内突出。 主体突出部的外周面和止推板的内周面被布置成彼此直接或间接接触。

公开(公告)号：US20190093705A1

公开(公告)日：2019-03-28

申请号：US16118435

申请日：2018-08-31

申请人： NIDEC CORPORATION

发明人： Kunio SAKURADA ,  Akinobu SUMIJI ,  Akihiro YUDATE ,  Sho NAKAMURA

IPC分类号： F16C32/06 ,  F04D25/06 ,  F04D29/056 ,  F04D29/10 ,  H02K5/16 ,  H02K7/08 ,  H02K7/14 ,  H02K21/22

CPC分类号： F16C32/0633 ,  F04D25/06 ,  F04D25/062 ,  F04D29/056 ,  F04D29/063 ,  F04D29/083 ,  F04D29/102 ,  F16C33/745 ,  F16C2360/46 ,  H02K5/163 ,  H02K5/1675 ,  H02K7/085 ,  H02K7/14 ,  H02K21/22

摘要： A bearing apparatus includes a cylindrical sleeve, a shaft rotatably inserted in the sleeve, lubricating oil arranged in a gap defined between an inner circumferential surface of the sleeve and an outer circumferential surface of the shaft, a seal member arranged at an axially upper end portion of the sleeve projecting from the sleeve, and an annular member fixed to an outer circumferential surface of the axially upper end portion of the shaft to rotate together with the shaft. The annular member includes a projecting portion projecting axially downward. The seal member and an axially lower end portion of the projecting portion overlap each other when viewed in at least one of the axial direction or a radial direction.

公开(公告)号：US20130321952A1

公开(公告)日：2013-12-05

申请号：US13785297

申请日：2013-03-05

申请人： NIDEC CORPORATION

发明人： Akinobu SUMIJI ,  Akihiro KIMURA ,  Kunio SAKURADA

IPC分类号： F16C32/06 ,  H02K7/08 ,  G11B19/20

CPC分类号： F16C32/0629 ,  F16C17/107 ,  F16C33/107 ,  F16C33/1085 ,  F16C33/745 ,  F16C2370/12 ,  G11B19/2036 ,  H02K5/1677 ,  H02K7/085

摘要： A bearing mechanism includes a shaft portion, a sleeve portion, a lower opposing portion, a lower outer ring-shaped portion, and an upper opposing portion. A lower seal portion serving as a pumping seal portion is provided in a lower seal gap between the sleeve portion and the lower outer ring-shaped portion. An upper seal portion is provided in an upper seal gap joined to an upper thrust gap. The lower portion of the sleeve portion includes a large-diameter portion and a small-diameter portion positioned below the large-diameter portion. The sleeve portion includes a communication path joined to the upper seal gap. The communication path includes an opening portion opened in a border between the large-diameter portion and the small-diameter portion. The outer peripheral portion of the lower opposing portion includes an outer periphery protrusion portion radially opposed to the small-diameter portion and axially opposed to the large-diameter portion.

摘要翻译： 轴承机构包括轴部，套筒部分，下相对部分，下外环形部分和上相对部分。 用作泵送密封部分的下部密封部分设置在套筒部分和下部外部环形部分之间的下部密封间隙中。 上密封部设置在与上推力间隙连接的上密封间隙中。 套筒部分的下部包括大直径部分和位于大直径部分下方的小直径部分。 套筒部分包括连接到上密封间隙的连通路径。 连通路径包括在大直径部分和小直径部分之间的边界处开口的开口部分。 下部相对部分的外周部分包括径向相对于小直径部分并与大直径部分轴向相对的外周突起部分。

公开(公告)号：US20130321951A1

公开(公告)日：2013-12-05

申请号：US13775467

申请日：2013-02-25

申请人： NIDEC CORPORATION

发明人： Akinobu SUMIJI ,  Akihiro KIMURA ,  Kunio SAKURADA

IPC分类号： F16C32/06 ,  G11B19/20 ,  H02K5/16

CPC分类号： F16C32/0633 ,  F16C17/107 ,  F16C33/1085 ,  F16C33/745 ,  F16C2370/12 ,  G11B19/2009 ,  G11B19/2036 ,  H02K5/165 ,  H02K5/1677

摘要： A bearing mechanism includes a shaft portion, a sleeve portion, a lower opposing portion, a lower outer annular portion, and an upper opposing portion. The sleeve portion includes a sleeve body and a lower thrust plate. A radial dynamic pressure bearing portion is defined in a radial gap. A lower thrust dynamic pressure bearing portion is defined in a lower thrust gap. A lower seal portion is defined in a lower seal gap located between the sleeve portion and the lower outer annular portion. An upper seal portion is defined in an upper seal gap continuous with an upper thrust gap. The sleeve portion includes a first communicating channel in communication with the upper seal gap, and a second communicating channel located between the sleeve body and the lower thrust plate. A lower mouth portion of the first communicating channel axially overlaps the lower thrust dynamic pressure bearing portion.

摘要翻译： 轴承机构包括轴部，套筒部，下相对部，下外环部和上相对部。 套筒部分包括套筒主体和下推力板。 径向动压承受部分限定在径向间隙中。 下推力动压轴承部分被限定在较低的推力间隙中。 下部密封部分限定在位于套筒部分和下部外部环形部分之间的下部密封间隙中。 上密封部分限定在与上推力间隙连续的上密封间隙中。 套筒部分包括与上部密封间隙连通的第一连通通道，以及位于套管主体和下推力板之间的第二连通通道。 第一连通通道的下口部分与下推力动压轴承部分轴向重叠。