公开(公告)号：US20100085661A1

公开(公告)日：2010-04-08

申请号：US12412870

申请日：2009-03-27

申请人： Takafumi ASADA ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

发明人： Takafumi ASADA ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

IPC分类号： G11B17/02 ,  F16C32/06

CPC分类号： F16C17/107 ,  F16C33/103 ,  F16C33/107 ,  F16C2370/12

摘要： In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir.

摘要翻译： 在一种流体动力轴承装置中，其中设置有在轴上的动压产生槽或套筒的内周上的径向支承面，并且轴与套筒之间的间隙充满润滑剂，环形凹部设置在一个 与转子轮毂相邻的套筒的端面和用于覆盖凹部的盖板附接到套筒上，以便限定用于润滑剂或空气的储存器，以便防止在油膜中不存在油膜的风险 由于在接收到轴承中的空气迫使油被油流出时，流体动力轴承装置的轴承的间隙。 台阶部设置在套筒的另一端面上，使得台阶部分和储存器通过连通孔相互连通。 在流体动力轴承装置的操作期间，流体动力轴承装置中的空气经由连通孔到达储存器，以便从储存器排出。

公开(公告)号：US07589934B2

公开(公告)日：2009-09-15

申请号：US12188545

申请日：2008-08-08

申请人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

发明人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

IPC分类号： G11B19/20

CPC分类号： F16C17/107 ,  F16C33/103 ,  F16C33/107 ,  F16C2370/12

摘要： In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir.

摘要翻译： 在一种流体动力轴承装置中，其中设置有在轴上的动压产生槽或套筒的内周上的径向支承面，并且轴与套筒之间的间隙充满润滑剂，环形凹部设置在一个 与转子轮毂相邻的套筒的端面和用于覆盖凹部的盖板附接到套筒上，以便限定用于润滑剂或空气的储存器，以便防止在油膜中不存在油膜的风险 由于在接收到轴承中的空气迫使油被油流出时，流体动力轴承装置的轴承的间隙。 台阶部设置在套筒的另一端面上，使得台阶部分和储存器通过连通孔相互连通。 在流体动力轴承装置的操作期间，流体动力轴承装置中的空气经由连通孔到达储存器，以便从储存器排出。

公开(公告)号：US07492548B2

公开(公告)日：2009-02-17

申请号：US10554473

申请日：2004-04-13

申请人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

发明人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

IPC分类号： G11B17/02

CPC分类号： F16C17/107 ,  F16C33/103 ,  F16C33/107 ,  F16C2370/12

摘要： In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir.

公开(公告)号：US20080304776A1

公开(公告)日：2008-12-11

申请号：US12188545

申请日：2008-08-08

申请人： Takafumi ASADA ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

发明人： Takafumi ASADA ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

IPC分类号： F16C32/06 ,  G11B17/02

CPC分类号： F16C17/107 ,  F16C33/103 ,  F16C33/107 ,  F16C2370/12

摘要： In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir.

摘要翻译： 在一种流体动力轴承装置中，其中设置有在轴上的动压产生槽或套筒的内周上的径向支承面，并且轴与套筒之间的间隙充满润滑剂，环形凹部设置在一个 与转子轮毂相邻的套筒的端面和用于覆盖凹部的盖板附接到套筒上，以便限定用于润滑剂或空气的储存器，以便防止在油膜中不存在油膜的风险 由于在接收到轴承中的空气迫使油被油流出时，流体动力轴承装置的轴承的间隙。 台阶部设置在套筒的另一端面上，使得台阶部分和储存器通过连通孔相互连通。 在流体动力轴承装置的操作期间，流体动力轴承装置中的空气经由连通孔到达储存器，以便从储存器排出。

公开(公告)号：US20060274448A1

公开(公告)日：2006-12-07

申请号：US10554473

申请日：2004-04-13

申请人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

发明人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

IPC分类号： G11B17/02

CPC分类号： F16C17/107 ,  F16C33/103 ,  F16C33/107 ,  F16C2370/12

摘要： In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir.

公开(公告)号：US07830637B2

公开(公告)日：2010-11-09

申请号：US12412870

申请日：2009-03-27

申请人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

发明人： Takafumi Asada ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Keigo Kusaka ,  Hiroyuki Kiriyama ,  Daisuke Ito

IPC分类号： G11B17/02

CPC分类号： F16C17/107 ,  F16C33/103 ,  F16C33/107 ,  F16C2370/12

摘要： In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir.

摘要翻译： 在一种流体动力轴承装置中，其中设置有在轴上的动压产生槽或套筒的内周上的径向支承面，并且轴与套筒之间的间隙充满润滑剂，环形凹部设置在一个 与转子轮毂相邻的套筒的端面和用于覆盖凹部的盖板附接到套筒上，以便限定用于润滑剂或空气的储存器，以便防止在油膜中不存在油膜的风险 由于在接收到轴承中的空气迫使油被油流出时，流体动力轴承装置的轴承的间隙。 台阶部设置在套筒的另一端面上，使得台阶部分和储存器通过连通孔相互连通。 在流体动力轴承装置的操作期间，流体动力轴承装置中的空气经由连通孔到达储存器，以便从储存器排出。

公开(公告)号：US20060029312A1

公开(公告)日：2006-02-09

申请号：US11194551

申请日：2005-08-02

申请人： Hiroyuki Kiriyama ,  Takao Yoshitsugu ,  Takafumi Asada ,  Hiroaki Saito

发明人： Hiroyuki Kiriyama ,  Takao Yoshitsugu ,  Takafumi Asada ,  Hiroaki Saito

IPC分类号： F16C32/06

CPC分类号： F16C33/103 ,  F16C2370/12 ,  H02K5/1677

摘要： An object of the present invention is to provide a hydrodynamic bearing device having a high reliability which can achieve miniaturization and reduction of weight and thickness, and a motor and a disc driving apparatus using the same. In the hydrodynamic bearing device according to the present invention, a sleeve through which a shaft penetrates has a first opposing surface substantially orthogonal to a central axis of the shaft at one end and has a second opposing surface at the other end. A thrust plate having a disc shape which is fixed near one end of the shaft or which is integrally formed with the shaft is positioned so as to oppose the first opposing surface of the sleeve. A seal plate positioned near the other end of the shaft is positioned with a gap to the second opposing surface of the sleeve.

摘要翻译： 本发明的目的是提供一种具有高可靠性的流体动力轴承装置，其可以实现重量和厚度的小型化和减小，以及使用其的电动机和盘驱动装置。 在根据本发明的流体动力轴承装置中，轴穿过的套筒具有在一端处基本上垂直于轴的中心轴线的第一相对表面，并且在另一端具有第二相对表面。 具有固定在轴的一端附近或与轴一体形成的圆盘形状的止推板被定位成与套筒的第一相对表面相对。 位于轴的另一端附近的密封板定位成与套筒的第二相对表面具有间隙。

公开(公告)号：US20070024136A1

公开(公告)日：2007-02-01

申请号：US11443175

申请日：2006-05-31

申请人： Hiroaki Saito ,  Hiroyuki Kiriyama ,  Takao Yoshitsugu ,  Koji Hirata

发明人： Hiroaki Saito ,  Hiroyuki Kiriyama ,  Takao Yoshitsugu ,  Koji Hirata

IPC分类号： H02K5/16 ,  F16C32/06

CPC分类号： F16C17/102 ,  F16C17/107 ,  F16C33/107 ,  H02K7/086

摘要： To provide a hydrodynamic bearing device with high reliability, with which reductions in size, weight, and thickness can be achieved, as well as a motor and a disk driving apparatus that make use of this hydrodynamic bearing device. The hydrodynamic bearing device pertaining to the present invention comprises a shaft 10, a thrust flange 16, a sleeve 11, a seal plate 21, and a retaining plate 20. A radial dynamic pressure bearing is formed in the radial direction gap between the shaft 10 and the sleeve 11, and a thrust dynamic pressure bearing is formed in the thrust dynamic bearing gap between the sleeve 11 and the thrust flange 16. A communicating hole 11d is formed for communicating between the gap between the sleeve 11 and the seal plate 21 and the thrust direction gap between the sleeve 11 and the thrust flange 116. The radial dynamic pressure bearing and/or the thrust dynamic pressure bearing are formed such that a lubricating oil 9 circulates in the gap between the sleeve 11 and the seal plate 21 from the inner peripheral side of the sleeve 11 toward the outer peripheral side.

摘要翻译： 提供具有高可靠性的流体动力轴承装置，其可以实现尺寸，重量和厚度的减小，以及利用该流体动力轴承装置的电动机和盘驱动装置。 本发明的流体动力轴承装置包括轴10，推力凸缘16，套筒11，密封板21和保持板20。 径向动压轴承形成在轴10和套筒11之间的径向间隙中，并且推力动压轴承形成在套筒11和推力凸缘16之间的推力动态轴承间隙中。 形成连通孔11d用于在套筒11和密封板21之间的间隙以及套筒11和推力凸缘116之间的推力方向间隙之间连通。 径向动压轴承和/或推力动压轴承形成为使得润滑油9从套筒11的内周侧向外周侧在套筒11和密封板21之间的间隙中循环。

公开(公告)号：US20080112306A1

公开(公告)日：2008-05-15

申请号：US11940036

申请日：2007-11-14

申请人： Koji HIRATA ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Hiroyuki Kiriyama

发明人： Koji HIRATA ,  Hiroaki Saito ,  Takao Yoshitsugu ,  Hiroyuki Kiriyama

IPC分类号： G11B21/02 ,  F16C27/00 ,  H02K7/08

CPC分类号： F16C17/107 ,  F16C33/107 ,  F16C33/74 ,  F16C2370/12 ,  G11B21/16

摘要： In order to prevent oil leakage in a hydrodynamic bearing device comprising an opening section in close proximity to a radial bearing and a lubricating fluid reservoir, a shaft 10, thrust flange 16, sleeve 11, seal plate 21, and stopper plate 20 are provided, a radial dynamic pressure bearing is formed in a radial clearance between the shaft 10 and sleeve 11, and a thrust dynamic pressure bearing is formed in a thrust direction clearance between the sleeve 11 and thrust flange 16. A connecting hole 11d is formed that connects a gap between the sleeve 11 and seal plate 21 and a thrust direction gap between the sleeve 11 and thrust flange 16. The relationship A

摘要翻译： 为了防止在包括靠近径向轴承和润滑流体储存器的开口部分的流体动力轴承装置中的油泄漏，提供轴10，推力凸缘16，套筒11，密封板21和止动板20， 径向动压轴承形成在轴10和套筒11之间的径向间隙中，并且推力动压轴承形成在套筒11和推力凸缘16之间的推力方向间隙。 形成连接孔11d，其连接套筒11和密封板21之间的间隙以及套筒11和推力凸缘16之间的推力方向间隙。 满足关系A