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公开(公告)号：US20190285116A1
公开(公告)日：2019-09-19
申请号：US16293886
申请日：2019-03-06
Applicant: Nidec Corporation
Inventor： Hiroshi MORISHITA , Kunio SAKURADA , Hirotaka TAMEKUNI , Takeru OMURA
Abstract: In an aerodynamic bearing, an outer peripheral surface of a shaft and an inner peripheral surface of a sleeve face each other in a radial direction. The sleeve includes a through hole penetrating the sleeve in the radial direction. A space on a radially inner side of the sleeve communicates with an external space of a motor through the through hole. A stationary portion includes a wall portion radially overlapping the through hole with a gap interposed therebetween on a radially outer side of the through hole.
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公开(公告)号：US20190195232A1
公开(公告)日：2019-06-27
申请号：US16157141
申请日：2018-10-11
Applicant: Nidec Corporation
Inventor： Kunio SAKURADA , Hiroshi MORISHITA , Akinobu SUMIJI , Hirotaka TAMEKUNI
IPC: F04D29/00 , F04D19/00 , F04D25/06 , F04D29/52 , F04D29/32 , F04D29/08 , F16C32/06 , H02K5/167 , H02K7/08 , H02K7/14 , H02K21/22
CPC classification number: 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
Abstract: 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.
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公开(公告)号：US20130321946A1
公开(公告)日：2013-12-05
申请号：US13775475
申请日：2013-02-25
Applicant: NIDEC CORPORATION
Inventor： Akihiro KIMURA , Akinobu SUMIJI , Kunio SAKURADA , Daisuke FUKUOKA , Akihisa MORIGUCHI
CPC classification number: F16C32/0633 , F16C17/107 , F16C33/107 , F16C33/1085 , F16C33/745 , F16C2370/12 , H02K5/165 , H02K5/1675
Abstract: 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.
Abstract translation: 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。
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Patent Agency Ranking
公开(公告)号：US20190093705A1
公开(公告)日：2019-03-28
申请号：US16118435
申请日：2018-08-31
Applicant: NIDEC CORPORATION
Inventor： Kunio SAKURADA , Akinobu SUMIJI , Akihiro YUDATE , Sho NAKAMURA
CPC classification number: 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
Abstract: 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.
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公开(公告)号：US20140010065A1
公开(公告)日：2014-01-09
申请号：US14024868
申请日：2013-09-12
Applicant: Nidec Corporation
Inventor： Akihiro KIMURA , Teiichi HIRONO , Kunio SAKURADA , Kyoko HORISE
CPC classification number: F16C32/0659 , F16C17/10 , F16C17/107 , F16C33/107 , F16C33/745 , F16C2370/12 , G11B19/2009 , G11B19/2036 , H02K5/1675 , H02K7/08 , H02K7/085
Abstract: A bearing apparatus includes a first cup portion defining a portion of a stationary portion of a bearing apparatus includes a first circular plate portion and a first cylindrical portion projecting downward from an outer edge portion of the first circular plate portion. A rotating portion of the bearing apparatus includes an annular recessed portion arranged to accommodate at least a lower end portion of the first cylindrical portion. The stationary portion includes a second cup portion including a second circular plate portion arranged to extend radially outward from an outer circumferential surface of a stationary shaft below the first cup portion and a second cylindrical portion arranged to project upward from an outer edge portion of the second circular plate portion. One of the first and second cup portions is integral with the stationary shaft defining a single monolithic member, and the other is fixed to the stationary shaft.
Abstract translation: 轴承装置包括限定轴承装置的固定部分的一部分的第一杯部分包括第一圆板部分和从第一圆板部分的外边缘部分向下突出的第一圆柱部分。 轴承装置的旋转部分包括设置成容纳第一圆筒部分的至少下端部的环形凹部。 固定部分包括第二杯部分，其包括第二圆板部分，第二圆形板部分布置成从第一杯部分下方的固定轴的外圆周表面径向向外延伸;以及第二圆柱部分，其布置成从第二杯部分的外边缘部分向上突出 圆板部分。 第一杯部分和第二杯部分中的一个与限定单个整体构件的固定轴成一体，另一个固定到固定轴。
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公开(公告)号：US20130321952A1
公开(公告)日：2013-12-05
申请号：US13785297
申请日：2013-03-05
Applicant: NIDEC CORPORATION
Inventor： Akinobu SUMIJI , Akihiro KIMURA , Kunio SAKURADA
CPC classification number: F16C32/0629 , F16C17/107 , F16C33/107 , F16C33/1085 , F16C33/745 , F16C2370/12 , G11B19/2036 , H02K5/1677 , H02K7/085
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20130321951A1
公开(公告)日：2013-12-05
申请号：US13775467
申请日：2013-02-25
Applicant: NIDEC CORPORATION
Inventor： Akinobu SUMIJI , Akihiro KIMURA , Kunio SAKURADA
CPC classification number: F16C32/0633 , F16C17/107 , F16C33/1085 , F16C33/745 , F16C2370/12 , G11B19/2009 , G11B19/2036 , H02K5/165 , H02K5/1677
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US20130077190A1
公开(公告)日：2013-03-28
申请号：US13681500
申请日：2012-11-20
Applicant: Nidec Corporation
Inventor： Akihiro KIMURA , Teiichi HIRONO , Kunio SAKURADA , Kyoko HORISE
CPC classification number: F16C32/0659 , F16C17/10 , F16C17/107 , F16C33/107 , F16C33/745 , F16C2370/12 , G11B19/2009 , G11B19/2036 , H02K5/1675 , H02K7/08 , H02K7/085
Abstract: A bearing apparatus includes stationary and rotating portions. The stationary portion includes a stationary shaft and a first cup portion. The rotating portion includes an annular recessed portion and first and second inner circumferential surfaces. Lubricating oil is arranged in a gap between the stationary and rotating portions. An upper surface of the lubricating oil is located between the second inner circumferential surface and an outer circumferential surface of the first cup portion. A lower surface of the lubricating oil is located between the rotating and stationary portions. The rotating portion further includes a through hole filled with the lubricating oil. One of the first cup portion and the rotating portion includes a pumping groove array arranged thereon to cause the lubricating oil to flow toward one end of the through hole during rotation of the rotating portion.
Abstract translation: 轴承装置包括固定和旋转部分。 固定部分包括固定轴和第一杯部分。 旋转部分包括环形凹部和第一和第二内圆周表面。 润滑油布置在固定部分和旋转部分之间的间隙中。 润滑油的上表面位于第二内周面和第一杯部的外周面之间。 润滑油的下表面位于旋转和静止部分之间。 旋转部分还包括填充有润滑油的通孔。 第一杯部分和旋转部分中的一个包括布置在其上的泵送槽阵列，以在旋转部分的旋转期间使润滑油朝向通孔的一端流动。
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