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1. 发明授权

US08013487B2 Hydrodynamic bearing device, and spindle motor and information apparatus equipped with same 有权
标题翻译：流体动力轴承装置，以及主轴电机和配备有其的信息装置
公开(公告)号：US08013487B2
公开(公告)日：2011-09-06
申请号：US12552632
申请日：2009-09-02
申请人： Koji Hirata , Keigo Kusaka , Takao Yoshitsugu , Yoshihito Watanabe , Hisaaki Yano
发明人： Koji Hirata , Keigo Kusaka , Takao Yoshitsugu , Yoshihito Watanabe , Hisaaki Yano
IPC分类号： H02K5/167 , F16C32/06
CPC分类号： F16C33/723 , F16C17/026 , F16C33/1085 , F16C33/745 , F16C2370/12
摘要： With a hydrodynamic bearing device 10, a first gap G1 is formed between a shaft 12 and a sleeve 11. A second gap G2 is formed between a sleeve cap 16 and the sleeve 11, and holds a lubricant 17. A thrust bearing member 21 is disposed near the inner peripheral surface of a center hole 16a of the sleeve cap 16. A third gap G3 is formed between the thrust bearing member 21 and the sleeve cap 16, and is open to the atmosphere. A fourth gap G4 is formed between the thrust bearing member 21 and the sleeve 11. The lubricant 17 circulates along a circulation passage that includes a communicating path 11b, the first gap G1 and the second gap G2.
摘要翻译：利用流体动力轴承装置10，在轴12和套筒11之间形成第一间隙G1。在套筒盖16和套筒11之间形成第二间隙G2，并且保持润滑剂17.止推轴承部件21是设置在套筒盖16的中心孔16a的内周面附近。第三间隙G3形成在推力轴承构件21和套筒盖16之间，并且向大气开放。第四间隙G4形成在推力轴承部件21和套筒11之间。润滑剂17沿着包括连通路径11b，第一间隙G1和第二间隙G2的循环通道循环。

2. 发明申请

US20100079022A1 HYDRODYNAMIC BEARING DEVICE, AND SPINDLE MOTOR AND INFORMATION APPARATUS EQUIPPED WITH SAME 有权
标题翻译：水动力轴承装置和主轴装置及其装备的信息装置
公开(公告)号：US20100079022A1
公开(公告)日：2010-04-01
申请号：US12552632
申请日：2009-09-02
申请人： Koji HIRATA , Keigo Kusaka , Takao Yoshitsugu , Yoshihito Watanabe , Hisaaki Yano
发明人： Koji HIRATA , Keigo Kusaka , Takao Yoshitsugu , Yoshihito Watanabe , Hisaaki Yano
IPC分类号： H02K5/167 , F16C32/06
CPC分类号： F16C33/723 , F16C17/026 , F16C33/1085 , F16C33/745 , F16C2370/12
摘要： With a hydrodynamic bearing device 10, a first gap G1 is formed between a shaft 12 and a sleeve 11. A second gap G2 is formed between a sleeve cap 16 and the sleeve 11, and holds a lubricant 17. A thrust bearing member 21 is disposed near the inner peripheral surface of a center hole 16a of the sleeve cap 16. A third gap G3 is formed between the thrust bearing member 21 and the sleeve cap 16, and is open to the atmosphere. A fourth gap G4 is formed between the thrust bearing member 21 and the sleeve 11. The lubricant 17 circulates along a circulation passage that includes a communicating path 11b, the first gap G1 and the second gap G2.
摘要翻译：利用流体动力轴承装置10，在轴12和套筒11之间形成第一间隙G1。在套筒盖16和套筒11之间形成第二间隙G2，并且保持润滑剂17.止推轴承部件21是设置在套筒盖16的中心孔16a的内周面附近。第三间隙G3形成在推力轴承构件21和套筒盖16之间，并且向大气开放。第四间隙G4形成在推力轴承部件21和套筒11之间。润滑剂17沿着包括连通路径11b，第一间隙G1和第二间隙G2的循环通道循环。

3. 发明授权

US07210850B2 Hydrodynamic bearing device, spindle motor and hard disk driving apparatus having the hydrodynamic bearing device 失效
标题翻译：具有流体动力轴承装置的流体动力轴承装置，主轴电机和硬盘驱动装置
公开(公告)号：US07210850B2
公开(公告)日：2007-05-01
申请号：US11183745
申请日：2005-07-19
申请人： Keigo Kusaka , Takafumi Asada , Koichi Fujimoto , Hisaaki Yano
发明人： Keigo Kusaka , Takafumi Asada , Koichi Fujimoto , Hisaaki Yano
IPC分类号： F16C32/06
CPC分类号： F16C33/74 , F16C17/107 , F16C33/107 , F16C2370/12
摘要： A hydrodynamic bearing device includes a sleeve having a bearing bore substantially at a center portion, a shaft inserted in the bearing bore in a rotatable manner, a thrust plate for supporting an end of the shaft in the thrust direction and an upper retaining portion that has an opening portion through which the shaft passes and covers the upper surface of the sleeve. A radial hydrodynamic bearing is formed between the bearing bore of the sleeve and the shaft, while a thrust hydrodynamic bearing is formed between the thrust plate and an end of the shaft. A first space is formed between the upper surface of the sleeve and the upper retaining portion. A second space is formed between the upper retaining portion and a step portion.
摘要翻译：流体动力轴承装置包括具有基本上在中心部分处的轴承孔的套筒，以可旋转方式插入到轴承孔中的轴，用于在推力方向上支撑轴的端部的止推板和具有轴穿过该开口部分并且覆盖套筒的上表面。在套筒的轴承孔和轴之间形成径向流体动力轴承，而在止推板和轴的端部之间形成有推力流体动力轴承。在套筒的上表面和上保持部之间形成第一空间。在上保持部和台阶部之间形成第二空间。

4. 发明申请

US20060018576A1 Hydrodynamic bearing device, spindle motor and hard disk driving apparatus having the hydrodynamic bearing device 失效
标题翻译：具有流体动力轴承装置的流体动力轴承装置，主轴电机和硬盘驱动装置
公开(公告)号：US20060018576A1
公开(公告)日：2006-01-26
申请号：US11183745
申请日：2005-07-19
申请人： Keigo Kusaka , Takafumi Asada , Koichi Fujimoto , Hisaaki Yano
发明人： Keigo Kusaka , Takafumi Asada , Koichi Fujimoto , Hisaaki Yano
IPC分类号： F16C32/06
CPC分类号： F16C33/74 , F16C17/107 , F16C33/107 , F16C2370/12
摘要： A hydrodynamic bearing device includes a sleeve having a bearing bore substantially at a center portion, a shaft inserted in the bearing bore in a rotatable manner, a thrust plate for supporting an end of the shaft in the thrust direction and an upper retaining portion that has an opening portion through which the shaft passes and covers the upper surface of the sleeve. A radial hydrodynamic bearing is formed between the bearing bore of the sleeve and the shaft, while a thrust hydrodynamic bearing is formed between the thrust plate and an end of the shaft. A first space is formed between the upper surface of the sleeve and the upper retaining portion. A second space is formed between the upper retaining portion and a step portion.
摘要翻译：流体动力轴承装置包括具有基本上在中心部分处的轴承孔的套筒，以可旋转方式插入到轴承孔中的轴，用于在推力方向上支撑轴的端部的止推板和具有轴穿过该开口部分并且覆盖套筒的上表面。在套筒的轴承孔和轴之间形成径向流体动力轴承，而在止推板和轴的端部之间形成有推力流体动力轴承。在套筒的上表面和上保持部之间形成第一空间。在上保持部和台阶部之间形成第二空间。

5. 发明申请

US20100085661A1 HYDRODYNAMIC BEARING DEVICE AND DISK ROTATION APPARATUS 失效
标题翻译：水力轴承装置和盘旋转装置
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。

6. 发明申请

US20080304776A1 HYDRODYNAMIC BEARING DEVICE AND DISK ROTATING APPARATUS 失效
标题翻译：水力轴承装置和盘旋转装置
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。

7. 发明申请

US20060274448A1 Hydrodynamic bearing device and disk rotating apparatus 有权
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.

8. 发明授权

US07589934B2 Hydrodynamic bearing device and disk rotating apparatus 失效
标题翻译：流体动力轴承装置和盘旋转装置
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。

9. 发明授权

US07492548B2 Hydrodynamic bearing device and disk rotating apparatus 有权
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.

10. 发明授权

US07830637B2 Hydrodynamic bearing device and disk rotation apparatus 失效
标题翻译：流体动力轴承装置和盘旋转装置
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。

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