公开(公告)号：US20050111766A1

公开(公告)日：2005-05-26

申请号：US10647947

申请日：2003-08-26

申请人： Hiromitsu Gotoh ,  Atsushi Ohta ,  Kazuaki Oguchi ,  Shinji Kinoshita

发明人： Hiromitsu Gotoh ,  Atsushi Ohta ,  Kazuaki Oguchi ,  Shinji Kinoshita

IPC分类号： F16C17/02 ,  F16C17/10 ,  F16C33/10 ,  F16C33/74 ,  G11B19/20 ,  H02K5/167 ,  H02K7/08 ,  H02K21/22 ,  F16C32/06

CPC分类号： F16C33/107 ,  F16C17/026 ,  F16C17/10 ,  F16C33/74 ,  F16C2370/12

摘要： Disclosed is a fluid dynamic pressure bearing device rotatably supporting a shaft member by dynamic pressure of a liquid such as oil or water filling the clearance between the shaft member and a shaft member support portion, in which it is possible to maintain bearing properties of the fluid dynamic pressure bearing device for a long period of time. The fluid dynamic pressure bearing device includes: a shaft member having a columnar portion formed substantially in a columnar configuration; a shaft member support portion having a shaft portion insertion hole for accommodating the shaft member; and a dynamic pressure generating portion formed by filling a clearance defined between the shaft member and the shaft member insertion hole with a liquid, with at least one of the surface of the shaft member and the inner wall surface of the insertion hole being equipped with a dynamic pressure generating groove for collecting the liquid to generate dynamic pressure when the shaft member is rotated, in which an annular shaft member protrusion protruding radially outwards is provided on an outer peripheral surface of the columnar portion situated axially on an outer side of the dynamic pressure generating portion.

摘要翻译： 公开了一种流体动压轴承装置，其通过填充轴构件和轴构件支撑部之间的间隙的诸如油或水的液体的动态压力可旋转地支撑轴构件，其中可以保持流体的轴承特性 动态压力轴承装置长时间使用。 流体动压轴承装置包括：轴构件，其具有基本上形成为柱状构造的柱状部分; 轴构件支撑部分，具有用于容纳轴构件的轴部插入孔; 以及动压生成部，其通过用液体填充限定在所述轴构件和所述轴构件插入孔之间的间隙而形成，所述轴构件的表面和所述插入孔的内壁面中的至少一个配备有 动压产生槽，用于在轴构件旋转时收集液体以产生动态压力，其中沿轴向位于动压力外侧的柱状部分的外周表面上设置径向向外突出的环形轴构件突出部 产生部分。

公开(公告)号：US07191806B2

公开(公告)日：2007-03-20

申请号：US10525465

申请日：2004-03-11

申请人： Ryoji Yoneyama ,  Shinji Kinoshita ,  Toru Kumagai ,  Hiromitsu Gotoh ,  Atsushi Ohta

发明人： Ryoji Yoneyama ,  Shinji Kinoshita ,  Toru Kumagai ,  Hiromitsu Gotoh ,  Atsushi Ohta

IPC分类号： B65B31/04

CPC分类号： F16N37/003

摘要： The opening of an oil container 11 for storing oil 12 is sealed airtight with a cover member 32. A one-sided-bag-shaped fluid dynamic pressure bearing 10 is seated on an O-ring 25 and fixed airtight onto the upper surface of a bearing seating 30. Inanexhaust position with the distal end portion of an injection tube 36 positioned away from an oil level, the inside of the oil container 11 is evacuated by a vacuum pump 22 through a suction/exhaust passage including a suction/exhaust through-hole 17, thus turning the inside of the one-sided-bag-shaped fluid dynamic pressure bearing (10) into a vacuum. In this state, a control device drives a moving device to raise the oil container 11 to an injection position and releases the suction/exhaust passage to the atmosphere. This causes the oil 12 to be injected into the one-sided-bag-shaped fluid dynamic pressure bearing 10 through an oil injection passage including the injection tube 36.

摘要翻译： 用于储存油12的油容器11的开口用盖构件32密封地密封。 单面袋状流体​​动压轴承10位于O形环25上，并且气密地固定在轴承座30的上表面上。 在喷射管36远离油位的远端部分的排气位置，油容器11的内部通过包括吸入/排气通孔17的抽吸/排气通道由真空泵22抽真空，因此 将单面袋状流体​​动压轴承（10）的内部转动成真空。 在这种状态下，控制装置驱动移动装置将油容器11升高到喷射位置，并将吸入/排出通道释放到大气中。 这使得油12通过包括注射管36的注油通道注入到单面袋形流体动压轴承10中。

公开(公告)号：US20050173196A1

公开(公告)日：2005-08-11

申请号：US10525465

申请日：2004-03-11

申请人： Ryoji Yoneyama ,  Shinji Kinoshita ,  Toru Kumagai ,  Hiromitsu Gotoh ,  Atsushi Ohta

发明人： Ryoji Yoneyama ,  Shinji Kinoshita ,  Toru Kumagai ,  Hiromitsu Gotoh ,  Atsushi Ohta

IPC分类号： F16N37/00 ,  F16N7/00

CPC分类号： F16N37/003

摘要： The opening of an oil container 11 for storing oil 12 is sealed airtight with a cover member 32. A one-sided-bag-shaped fluid dynamic pressure bearing 10 is seated on an O-ring 25 and fixed airtight onto the upper surface of a bearing seating 30. Inanexhaust position with the distal end portion of an injection tube 36 positioned away from an oil level, the inside of the oil container 11 is evacuated by a vacuum pump 22 through a suction/exhaust passage including a suction/exhaust through-hole 17, thus turning the inside of the one-sided-bag-shaped fluid dynamic pressure bearing (10) into a vacuum. In this state, a control device drives a moving device to raise the oil container 11 to an injection position and releases the suction/exhaust passage to the atmosphere. This causes the oil 12 to be injected into the one-sided-bag-shaped fluid dynamic pressure bearing 10 through an oil injection passage including the injection tube 36.

摘要翻译： 用于储存油12的油容器11的开口用盖构件32密封地密封。 单面袋状流体​​动压轴承10位于O形环25上，并且气密地固定在轴承座30的上表面上。 在喷射管36远离油位的远端部分的排气位置，油容器11的内部通过包括吸入/排气通孔17的抽吸/排气通道由真空泵22抽真空，因此 将单面袋状流体​​动压轴承（10）的内部转动成真空。 在这种状态下，控制装置驱动移动装置将油容器11升高到喷射位置，并将吸入/排出通道释放到大气中。 这使得油12通过包括注射管36的注油通道注入到单面袋形流体动压轴承10中。

公开(公告)号：US08292506B2

公开(公告)日：2012-10-23

申请号：US12800891

申请日：2010-05-25

申请人： Hiromitsu Gotoh ,  Atsushi Ohta

发明人： Hiromitsu Gotoh ,  Atsushi Ohta

IPC分类号： F16C32/06

CPC分类号： G11B19/2018 ,  F16C17/045 ,  F16C17/107 ,  F16C33/745 ,  F16C2370/12 ,  H02K5/1675 ,  H02K7/085

摘要： A thinner fluid dynamic bearing capable of stable shaft rotation, a motor including the bearing, and a recording-medium driving apparatus including the bearing are provided. Pressure-generating grooves are provided in thrust surfaces of a thrust bearing portion 39 opposite a circular plate 35 and a stopper 33 to attract a working fluid from inner and outer edges of the thrust bearing portion 39 to a radially midway portion thereof as a shaft member 16 rotates relative to a support 22. One or more through-holes 48 are provided between inner edges of annular regions of the thrust surfaces in which the pressure-generating grooves are provided and the midway portion in the radial direction. The through-holes extend through the thrust bearing portion 39 in a central-axis direction of the shaft member.

摘要翻译： 提供一种能够稳定地转动的较薄的流体动力轴承，包括该轴承的马达以及包括轴承的记录介质驱动装置。 压力产生槽设置在与圆板35相对的推力轴承部分39的止推表面和止动件33上，以将工作流体从推力轴承部分39的内边缘和外边缘吸引到其径向中间部分，作为轴构件 16相对于支撑件22旋转。一个或多个通孔48设置在其中设置有压力产生槽的推力表面的环形区域的内边缘和径向方向上的中间部分之间。 通孔在轴构件的中心轴方向上延伸穿过止推轴承部39。

公开(公告)号：US20110068650A1

公开(公告)日：2011-03-24

申请号：US12926457

申请日：2010-11-18

申请人： Hiromitsu Gotoh ,  Atsushi Ohta

发明人： Hiromitsu Gotoh ,  Atsushi Ohta

IPC分类号： H02K7/08 ,  F16C32/06

CPC分类号： G11B19/2018 ,  F16C17/045 ,  F16C17/107 ,  F16C33/745 ,  F16C2370/12 ,  H02K5/1675 ,  H02K7/085

摘要： A fluid dynamic bearing includes a shaft member engaged with a circular plate extending radially outward therefrom; a support including a cylinder rotatably accommodating the shaft member, an outer surface of the support having a tapered portion toward an axial upper surface thereof opposing the circular plate; a stopper, an inner surface of the stopper having a constant diameter in an axial direction in a portion opposite to the tapered portion of the support so as to form a tapered gap with respect to an outer surface of the support located under the axial upper surface of the support; and a working fluid placed between the inner surface of the stopper and the outer surface of the support.

摘要翻译： 流体动力轴承包括与从其径向向外延伸的圆形板接合的轴构件; 支撑件，其包括可旋转地容纳所述轴构件的圆筒，所述支撑件的外表面具有朝向与所述圆板相对的轴向上表面的锥形部分; 止动件，止动件的内表面在与支撑件的锥形部分相对的部分中在轴向上具有恒定的直径，以便相对于位于轴向上表面下方的支撑件的外表面形成锥形间隙 的支持; 以及放置在止动件的内表面和支撑件的外表面之间的工作流体。

公开(公告)号：US07438476B2

公开(公告)日：2008-10-21

申请号：US10274809

申请日：2002-10-21

申请人： Hiromitsu Gotoh ,  Ryouji Yoneyama ,  Atsushi Ohta

发明人： Hiromitsu Gotoh ,  Ryouji Yoneyama ,  Atsushi Ohta

IPC分类号： F16C17/04

CPC分类号： F16C17/107 ,  F16C33/107

摘要： A hydraulic dynamic bearing has a rotor comprised of a flanged shaft having a thrust ring portion and a cylinder portion, a hub attached to the flanged shaft, and a rotor magnet attached to an inner peripheral face of a skirt portion of the hub. A stator rotatably supports the rotor and comprises a bearing sleeve to which are attached stator coils, and a stator base plate that supports the sleeve. A gap exists between confronting surfaces of the flanged shaft and the bearing sleeve, and lubricating oil is sealed in the gap. Thrust dynamic pressure generating grooves are formed in one or both faces of the thrust ring, and the grooves are in the form of a herringbone pattern having radial inner groove sections and outer groove sections. The depth of the inner groove sections is shallower than that of the outer groove sections, and the depths of both groove sections are constant. The optimum inner-to-outer groove depth ratio is 0.6 to 0.7.

摘要翻译： 液压动态轴承具有转子，该转子包括具有止推环部分和气缸部分的凸缘轴，附接到凸缘轴的轮毂和附接到轮毂的裙部的内周面的转子磁体。 定子可旋转地支撑转子并且包括附接有定子线圈的轴承套和支撑套筒的定子底板。 在法兰轴和轴承套的相对面之间存在间隙，润滑油被密封在间隙中。 推力动压产生槽形成在推力环的一个或两个面上，并且槽是具有径向内槽部分和外槽部分的人字形图案的形式。 内槽部的深度比外槽部的深度浅，两槽部的深度不变。 最佳内外槽深度比为0.6〜0.7。

公开(公告)号：US20080089626A1

公开(公告)日：2008-04-17

申请号：US11629013

申请日：2005-06-02

申请人： Hiromitsu Gotoh ,  Atsushi Ohta

发明人： Hiromitsu Gotoh ,  Atsushi Ohta

IPC分类号： F16C17/10 ,  F16C32/06 ,  F16C33/10 ,  F16C33/74 ,  G11B19/20 ,  H02K21/16 ,  H02K7/08

CPC分类号： G11B19/2018 ,  F16C17/045 ,  F16C17/107 ,  F16C33/745 ,  F16C2370/12 ,  H02K5/1675 ,  H02K7/085

摘要： A thinner fluid dynamic bearing capable of stable shaft rotation, a motor including the bearing, and a recording-medium driving apparatus including the bearing are provided. Pressure-generating grooves are provided in thrust surfaces of a thrust bearing portion 39 opposite a circular plate 35 and a stopper 33 to attract a working fluid from inner and outer edges of the thrust bearing portion 39 to a radially midway portion thereof as a shaft member 16 rotates relative to a support 22. One or more through-holes 48 are provided between inner edges of annular regions of the thrust surfaces in which the pressure-generating grooves are provided and the midway portion in the radial direction. The through-holes extend through the thrust bearing portion 39 in a central-axis direction of the shaft member.

摘要翻译： 提供一种能够稳定地转动的较薄的流体动力轴承，包括该轴承的马达以及包括轴承的记录介质驱动装置。 压力产生槽设置在与圆板35相对的推力轴承部分39的止推表面和止动件33上，以将工作流体从推力轴承部分39的内边缘和外边缘吸引到其径向中间部分，作为轴构件 16相对于支撑件22旋转。 在提供压力产生槽的推力表面的环形区域的内边缘和径向中间部分之间设置有一个或多个通孔48。 通孔在轴构件的中心轴方向上延伸穿过止推轴承部39。

公开(公告)号：US20070253651A1

公开(公告)日：2007-11-01

申请号：US10274809

申请日：2002-10-21

申请人： Hiromitsu Gotoh ,  Ryouji Yoneyama ,  Atsushi Ohta

发明人： Hiromitsu Gotoh ,  Ryouji Yoneyama ,  Atsushi Ohta

IPC分类号： H02K7/08 ,  F16C32/06

CPC分类号： F16C17/107 ,  F16C33/107

摘要： [Problem] In a hydraulic dynamic bearing comprising a flanged shaft having a thrust ring portion and a cylinder portion, a single bag-like stepped sleeve, a presser ring and a lubricating oil sealed in a fine gap including a thrust gap formed between these bearing constituting members, the lubricating oil in a thrust dynamic pressure generating groove is prevented from being subjected a negative pressure in the vicinity of an inlet. [Means for Resolution] In case of a spiral pattern, the thrust dynamic pressure generating groove G2 is formed such that its depth becomes gradually deep from a side at which a flow velocity of the lubricating oil flowing through the thrust gap is low toward a side at which it is high. Further, in case of a herringbone pattern, the thrust dynamic pressure generating groove G2 is formed such that its depth becomes shallow in an inner peripheral face side than a return point R of the pattern and deep in an outer peripheral face side. An optimum groove depth ratio is 0.6 to 0.7.

摘要翻译： [问题]在包括具有止推环部分和气缸部分的带凸缘轴的液压动态轴承中，单个袋状阶梯套筒，压紧环和密封在具有在这些轴承之间形成的推力间隙的微细间隙中的润滑油 构成构件，防止推力动压发生槽中的润滑油在入口附近受到负压。 [解决方法]在螺旋图案的情况下，推力动压产生槽G2形成为使得其深度从流过推力间隙的润滑油的流速向侧向下逐渐变深 在它是高的。 此外，在人字纹图案的情况下，推力动压产生槽G2形成为使得其内周面侧的深度比图案的返回点R和外周面侧的深度更浅。 最佳槽深度比为0.6〜0.7。

公开(公告)号：US08777488B2

公开(公告)日：2014-07-15

申请号：US13614360

申请日：2012-09-13

申请人： Hiromitsu Gotoh ,  Atsushi Ohta

发明人： Hiromitsu Gotoh ,  Atsushi Ohta

IPC分类号： F16C32/06

CPC分类号： G11B19/2018 ,  F16C17/045 ,  F16C17/107 ,  F16C33/745 ,  F16C2370/12 ,  H02K5/1675 ,  H02K7/085

摘要： A motor includes a rotor having a permanent magnet; a sleeve rotatably supporting the rotor; fluid provided in a gap between the rotor and the sleeve; a stator having a electromagnet disposed opposite to the permanent magnet to rotate the rotor relative to the stator; and a boss interposed between the sleeve and the stator. In the motor, the sleeve, the stator, and the boss are provided as separate members.

摘要翻译： 马达包括具有永磁体的转子; 可旋转地支撑转子的套筒; 设置在转子和套筒之间的间隙中的流体; 定子，其具有与所述永磁体相对设置的电磁体，以相对于所述定子旋转所述转子; 以及插入在套筒和定子之间的凸台。 在电动机中，套筒，定子和凸台被提供为分离的构件。

公开(公告)号：US20100239195A1

公开(公告)日：2010-09-23

申请号：US12800891

申请日：2010-05-25

申请人： Hiromitsu Gotoh ,  Atsushi Ohta

发明人： Hiromitsu Gotoh ,  Atsushi Ohta

IPC分类号： F16C32/06

CPC分类号： G11B19/2018 ,  F16C17/045 ,  F16C17/107 ,  F16C33/745 ,  F16C2370/12 ,  H02K5/1675 ,  H02K7/085

摘要： A thinner fluid dynamic bearing capable of stable shaft rotation, a motor including the bearing, and a recording-medium driving apparatus including the bearing are provided. Pressure-generating grooves are provided in thrust surfaces of a thrust bearing portion 39 opposite a circular plate 35 and a stopper 33 to attract a working fluid from inner and outer edges of the thrust bearing portion 39 to a radially midway portion thereof as a shaft member 16 rotates relative to a support 22. One or more through-holes 48 are provided between inner edges of annular regions of the thrust surfaces in which the pressure-generating grooves are provided and the midway portion in the radial direction. The through-holes extend through the thrust bearing portion 39 in a central-axis direction of the shaft member.

摘要翻译： 提供一种能够稳定地转动的较薄的流体动力轴承，包括该轴承的马达以及包括轴承的记录介质驱动装置。 压力产生槽设置在与圆板35相对的推力轴承部分39的止推表面和止动件33上，以将工作流体从推力轴承部分39的内边缘和外边缘吸引到其径向中间部分，作为轴构件 16相对于支撑件22旋转。一个或多个通孔48设置在其中设置有压力产生槽的推力表面的环形区域的内边缘和径向方向上的中间部分之间。 通孔在轴构件的中心轴方向上延伸穿过止推轴承部39。