公开(公告)号：US07862238B2

公开(公告)日：2011-01-04

申请号：US11730144

申请日：2007-03-29

申请人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Itou ,  Keigo Kusaka ,  Hiroyuki Kiriyama

发明人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Itou ,  Keigo Kusaka ,  Hiroyuki Kiriyama

IPC分类号： F16C32/06 ,  F16C17/10

CPC分类号： F16C33/102 ,  F16C17/107 ,  F16C33/107 ,  F16C2370/12

摘要： A hydrodynamic bearing rotary device which can reduce rotation friction, and recording and reproducing apparatus including the same is provided. In the hydrodynamic bearing rotary device, such as hard disc devices, a rotary shaft having a hub on one end is provided in a bearing of a sleeve so as to be rotatable. Thrust hydrodynamic grooves are provided on the other end surface of the rotary shaft, to form a thrust bearing with the thrust plate. A communication path is provided in the sleeve. The second gap between the hub and the sleeve end surface is used as a flow channel and is connected to the communication path. In this way, the rotation friction torque of the thrust bearing can be made sufficiently small, and internal pressure in bonded portions of the rotary shaft or the bottom plate can be suppressed. Thus, the oil can be prevented from oozing out from a small space of the bonded surfaces. Furthermore, the hydrodynamic bearing can be made thin. These effects can be combined to realize an optimal hydrodynamic bearing rotary device.

摘要翻译： 提供一种可以降低旋转摩擦力的流体动力轴承旋转装置，以及包括其的记录和再现装置。 在诸如硬盘装置的流体动力轴承旋转装置中，一个具有一端的轮毂的旋转轴设置在套筒的轴承中以便可旋转。 在旋转轴的另一端面上设置有推力液压动力槽，与止推板形成推力轴承。 在套筒中提供通信路径。 轮毂和套筒端面之间的第二间隙用作流动通道并连接到连通路径。 以这种方式，推力轴承的旋转摩擦转矩可以变得足够小，并且可以抑制旋转轴或底板的接合部分的内部压力。 因此，可以防止油从接合表面的小空间渗出。 此外，流体动力轴承可以变薄。 这些效果可以结合起来，实现最佳的流体动力轴承旋转装置。

公开(公告)号：US20070230840A1

公开(公告)日：2007-10-04

申请号：US11730144

申请日：2007-03-29

申请人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Itou ,  Keigo Kusaka ,  Hiroyuki Kiriyama

发明人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Itou ,  Keigo Kusaka ,  Hiroyuki Kiriyama

IPC分类号： F16C32/06

CPC分类号： F16C33/102 ,  F16C17/107 ,  F16C33/107 ,  F16C2370/12

摘要： A hydrodynamic bearing rotary device which can reduce rotation friction, and recording and reproducing apparatus including the same are provided. In the hydrodynamic bearing rotary device such as hard disc devices, a rotary shaft having a hub on one end is provided in a bearing of a sleeve so as to be rotatable. Thrust hydrodynamic grooves are provided on the other end surface of the rotary shaft, to form a thrust bearing with the thrust plate. A communication path is provided in the sleeve. The second gap between the hub and the sleeve end surface is used as a flow channel and is connected to the communication path. In this way, the rotation friction torque of the thrust bearing can be made sufficiently small, and internal pressure in bonded portions of the rotary shaft or the bottom plate can be suppressed. Thus, the oil can be prevented from oozing out from a small space of the bonded surfaces. Furthermore, the hydrodynamic bearing can be made thin. These effects can be combined to realize an optimal hydrodynamic bearing rotary device.

摘要翻译： 提供了能够降低旋转摩擦力的流体动力轴承旋转装置，以及包括其的记录和再现装置。 在诸如硬盘装置的流体动力轴承旋转装置中，一个具有一端的轮毂的旋转轴设置在套筒的轴承中以便可旋转。 在旋转轴的另一端面上设置有推力液压动力槽，与止推板形成推力轴承。 在套筒中提供通信路径。 轮毂和套筒端面之间的第二间隙用作流动通道并连接到连通路径。 以这种方式，推力轴承的旋转摩擦转矩可以变得足够小，并且可以抑制旋转轴或底板的接合部分的内部压力。 因此，可以防止油从接合表面的小空间渗出。 此外，流体动力轴承可以变薄。 这些效果可以结合起来，实现最佳的流体动力轴承旋转装置。

公开(公告)号：US07237956B2

公开(公告)日：2007-07-03

申请号：US10727860

申请日：2003-12-04

申请人： Takafumi Asada ,  Hiroaki Saito ,  Keigo Kusaka ,  Daisuke Itou

发明人： Takafumi Asada ,  Hiroaki Saito ,  Keigo Kusaka ,  Daisuke Itou

IPC分类号： F16C32/06

CPC分类号： F16C33/107 ,  F16C17/045 ,  F16C17/107 ,  F16C2370/12

摘要： A high-accuracy, long-life hydrodynamic bearing that does not cause oil film breakage in bearing clearances and a disc rotation apparatus using the bearing is disclosed. Oil film breakage is avoided as negative pressure is prevented from generating between the shaft and sleeve of the hydrodynamic bearing. Herringbone shaped dynamic pressure generating grooves, located on the thrust bearing section and the radial bearing section of the hydrodynamic bearing, are oil filled and have optimum shapes. The optimum shapes prevent the generation negative pressure and thus prevents the coagulation of air bubbles that can cause oil film breakage. The disc rotation apparatus, that holds a reproduction/recording disc, is concentrically secured to the hydrodynamic bearing and rotated. The disc is put into contact with magnetic or optical heads while rotating in the disc rotation apparatus. Both the hydrodynamic bearing and the disc rotation apparatus experience high reliability.

公开(公告)号：US07102851B2

公开(公告)日：2006-09-05

申请号：US10727448

申请日：2003-12-03

申请人： Takafumi Asada ,  Hiroaki Saito ,  Keigo Kusaka ,  Daisuke Itou

发明人： Takafumi Asada ,  Hiroaki Saito ,  Keigo Kusaka ,  Daisuke Itou

IPC分类号： G11B17/02

CPC分类号： F16C33/102 ,  F16C17/107 ,  F16C33/107 ,  F16C33/74 ,  F16C2370/12 ,  G11B19/2009

摘要： A sleeve 1 is fixed on a base. Radial dynamic-pressure generating grooves 1A and 1B are provided on an inner surface of the sleeve 1. A thrust plate 4 hermetically seals a lower opening end of the sleeve 1. A shaft 2 is inserted inside the sleeve 1, being allowed to revolve. A flange 3 is fixed at the bottom end of the shaft 2, and its lower surface is placed close to an upper surface of the thrust plate 4. Thrust dynamic-pressure generating grooves 3A and 3B are provided on the surfaces of the flange 3. Gaps A–H among the sleeve 1, the shaft 2, the flange 3, and the thrust plate 4 are filled with a lubricant 5. Hollows 1C–1F are provided on the inner surface of the sleeve 1. The gaps A and C over the thrust dynamic-pressure generating grooves 3A and 3B and their vicinities are narrower than the surrounding gaps B and D (A

摘要翻译： 套筒1固定在基座上。 径向动压产生槽1A和1B设置在套筒1的内表面上。 止推板4气密地密封套筒1的下开口端。 轴2插入套筒1内，允许旋转。 凸缘3固定在轴2的底端，其下表面靠近推力板4的上表面放置。 在凸缘3的表面上设置有推力动压发生槽3A和3B。 套筒1，轴2，凸缘3和推力板4之间的间隙A-H填充有润滑剂5。 在套筒1的内表面上设置空腔1C-1F。 推力动压发生槽3 A和3 B及其附近的间隙A和C比周围间隙B和D（A

公开(公告)号：US07237955B2

公开(公告)日：2007-07-03

申请号：US10727070

申请日：2003-12-02

申请人： Takafumi Asada ,  Hiroaki Saito ,  Keigo Kusaka ,  Daisuke Itou

发明人： Takafumi Asada ,  Hiroaki Saito ,  Keigo Kusaka ,  Daisuke Itou

IPC分类号： F16C32/06

CPC分类号： F16C33/107 ,  F16C17/045 ,  F16C17/107 ,  F16C2370/12 ,  G11B19/2018

摘要： A high-accuracy, long-life hydrodynamic bearing that does not cause oil film breakage in bearing clearances and a disc rotation apparatus using the bearing is disclosed. Oil film breakage is avoided as negative pressure is prevented from generating between the shaft and sleeve of the hydrodynamic bearing. Herringbone shaped dynamic pressure generating grooves, located on the thrust bearing section and the radial bearing section of the hydrodynamic bearing, are oil filled and have optimum shapes. The optimum shapes prevent the generation negative pressure and thus prevents the coagulation of air bubbles that can cause oil film breakage. The disc rotation apparatus, that holds a reproduction/recording disc, is concentrically secured to the hydrodynamic bearing and rotated. The disc is put into contact with magnetic or optical heads while rotating in the disc rotation apparatus. Both the hydrodynamic bearing and the disc rotation apparatus experience high reliability.

摘要翻译： 公开了一种高精度，长寿命的流体动力轴承，其不会导致轴承间隙中的油膜破裂和使用轴承的盘旋转装置。 避免了油膜断裂，因为防止在流体动力轴承的轴和套筒之间产生负压。 位于推力轴承部分和流体动力轴承的径向轴承部分的人字形动态压力产生槽被充满油并具有最佳形状。 最佳形状可以防止发生负压，从而防止会导致油膜破裂的气泡凝结。 保持再现/记录盘的盘旋转装置同心地固定到流体动力轴承并旋转。 在盘旋转装置中旋转时，盘与磁头或光头接触。 流体动力轴承和圆盘旋转装置都具有高可靠性。

公开(公告)号：US07196868B2

公开(公告)日：2007-03-27

申请号：US10725150

申请日：2003-12-01

申请人： Takafumi Asada ,  Hiroaki Saito ,  Keigo Kusaka ,  Daisuke Itou

发明人： Takafumi Asada ,  Hiroaki Saito ,  Keigo Kusaka ,  Daisuke Itou

IPC分类号： G11B17/08 ,  G11B17/02

CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C2370/12 ,  G11B17/038 ,  G11B19/2009

摘要： Radial dynamic pressure grooves are provided in a first region 4A and a second region 4B on the side of a fixed shaft 2. A vent 2D is provided inside the top end 2A of the fixed shaft 2. The vent 2D connects spaces over and under a flange 3 to each other. The flange 3 in an annular shape is fixed at the top end 2A of the fixed shaft 2. Thrust dynamic pressure grooves 3A and 3B are provided on the surfaces of the flange 3. A circulation hole 3C is provided in the flange 3, and connects spaces over and under the flange 3 to each other. A sleeve 4 revolves around the fixed shaft 2. A thrust plate 6 in an annular shape is fixed at the top of the sleeve 4 and opposed to the flange 3. The first region 4A, the second region 4B, the thrust dynamic pressure grooves 3A and 3B, and the circulation hole 3C of the flange 3 are filled with a lubricant 7. At the revolution of the sleeve 4, the lubricant 7 is concentrated in each central part of the first region 4A, the second region 4B, and the thrust dynamic pressure grooves 3A and 3B and their vicinities, then raising the pressure. The sleeve 4 keeps its stable high-speed revolution, avoiding contact with the fixed shaft 2. The lubricant 7 circulates on surfaces of the flange 3 through the circulation hole 3C.

摘要翻译： 径向动压槽设置在固定轴2一侧的第一区域4A和第二区域4B中。 在固定轴2的顶端部2A内设置有排气口D D。 通风口2 D将法兰3上方和下方的空间相互连接。 环状的凸缘3固定在固定轴2的顶端部2A。 在凸缘3的表面设置有推力动压槽3A和3B。 在凸缘3中设置有循环孔3C，并且将凸缘3上方和下方的空间彼此连接。 套筒4围绕固定轴2旋转。 环形的止推板6固定在套筒4的顶部并与凸缘3相对。 第一区域4A，第二区域4B，推力动压力槽3A和3B以及凸缘3的循环孔3C填充有润滑剂7。 在套筒4的旋转时，润滑剂7集中在第一区域4A，第二区域4B和推力动压力槽3A和3B的各个中心部分及其附近，然后升高压力。 套筒4保持其稳定的高速旋转，避免与固定轴2接触。 润滑剂7通过循环孔C3在凸缘3的表面上循环。

公开(公告)号：US07011450B2

公开(公告)日：2006-03-14

申请号：US10724046

申请日：2003-12-01

申请人： Keigo Kusaka ,  Daisuke Itou ,  Hiroaki Saito ,  Takafumi Asada ,  Yasuhiro Asaida

发明人： Keigo Kusaka ,  Daisuke Itou ,  Hiroaki Saito ,  Takafumi Asada ,  Yasuhiro Asaida

IPC分类号： F16C32/06

CPC分类号： F16C17/107 ,  F16C33/107 ,  F16C33/1085 ,  F16C2370/12 ,  G11B19/2018

摘要： A fluid dynamic bearing device including a shaft having an interior pressure regulating hole by which a center portion of a thrust surface confronting a thrust plate and a lubricant pool portion of an inner circumferential surface of a sleeve are communicated with each other. Thus, the device is capable of obtaining stable thrust floating characteristics and preventing leaks of the lubricant as well as exhaustion of the lubricant.

摘要翻译： 一种流体动力轴承装置，包括具有内部压力调节孔的轴，通过该内部压力调节孔将推力板的中心部分与推力板的内周面的润滑剂池部分相互连通。 因此，该装置能够获得稳定的推力浮动特性并防止润滑剂的泄漏以及润滑剂的耗尽。

公开(公告)号：US07674043B2

公开(公告)日：2010-03-09

申请号：US11723316

申请日：2007-03-19

申请人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Itou ,  Hiroyuki Kiriyama ,  Tomoharu Takeda

发明人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Itou ,  Hiroyuki Kiriyama ,  Tomoharu Takeda

IPC分类号： F16C32/06

CPC分类号： F16C33/102 ,  F16C17/107 ,  F16C33/107 ,  F16C33/74 ,  F16C2370/12

摘要： An object of the present invention is to provide a hydrodynamic bearing type rotary device which can improve rotation performance, suppress a friction torque, and reduce power consumption of motor, and a recording and reproducing apparatus including the same. A shaft having a flange on one end and a hub on the other end is provided with a bearing of a sleeve so as to be rotatable. The sleeve includes a communication hole. A third gap between the hub and the sleeve end surface is a flow path, and is connected to the communication hole. Provided that a first gap between a thrust plate 4 and the flange 3 is S1, a second gap between the flange 3 and a lower end surface of the sleeve 1 is S2, and a third gap between the upper end surface of the sleeve 1 and the hub 7 is S3, widths of the gaps satisfy the relational expression, S3>(S1+S2).

摘要翻译： 本发明的目的是提供一种能够提高旋转性能，抑制摩擦转矩并降低电动机的功率消耗的流体动力轴承型旋转装置，以及包括其的记录和再现装置。 具有一端的凸缘和另一端的毂的轴设置有可旋转的套筒的轴承。 套筒包括一个连通孔。 轮毂和套筒端面之间的第三间隙是流动路径，并连接到连通孔。 假设推力板4和凸缘3之间的第一间隙为S1，凸缘3与套筒1的下端面之间的第二间隙为S2，套管1的上端面与 轮毂7是S3，间隙的宽度满足关系式S3>（S1 + S2）。

公开(公告)号：US20070217721A1

公开(公告)日：2007-09-20

申请号：US11723316

申请日：2007-03-19

申请人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Itou ,  Hiroyuki Kiriyama ,  Tomoharu Takeda

发明人： Takafumi Asada ,  Hiroaki Saito ,  Daisuke Itou ,  Hiroyuki Kiriyama ,  Tomoharu Takeda

IPC分类号： F16C32/06

CPC分类号： F16C33/102 ,  F16C17/107 ,  F16C33/107 ,  F16C33/74 ,  F16C2370/12

摘要： An object of the present invention is to provide a hydrodynamic bearing type rotary device which can improve rotation performance, suppress a friction torque, and reduce power consumption of motor, and a recording and reproducing apparatus including the same. A shaft having a flange on one end and a hub on the other end is provided with a bearing of a sleeve so as to be rotatable. The sleeve includes a communication hole. A third gap between the hub and the sleeve end surface is a flow path, and is connected to the communication hole. Provided that a first gap between a thrust plate 4 and the flange 3 is S1, a second gap between the flange 3 and a lower end surface of the sleeve 1 is S2, and a third gap between the upper end surface of the sleeve 1 and the hub 7 is S3, widths of the gaps satisfy the relational expression, S3>(S1+S2).

摘要翻译： 本发明的目的是提供一种能够提高旋转性能，抑制摩擦转矩并降低电动机的功率消耗的流体动力轴承型旋转装置，以及包括其的记录和再现装置。 具有一端的凸缘和另一端的毂的轴设置有可旋转的套筒的轴承。 套筒包括一个连通孔。 轮毂和套筒端面之间的第三间隙是流动路径，并连接到连通孔。 假设推力板4和凸缘3之间的第一间隙为S 1，则凸缘3与套筒1的下端面之间的第二间隙为S 2，套筒上端表面之间的第三间隙 1，集线器7为S 3，间隙的宽度满足关系式S 3>（S 1 + S 2）。

公开(公告)号：US08499125B2

公开(公告)日：2013-07-30

申请号：US11790272

申请日：2007-04-24

申请人： Makoto Hataida ,  Toshikazu Ueki ,  Takaharu Ishizuka ,  Takashi Yamamoto ,  Yuka Hosokawa ,  Takeshi Owaki ,  Daisuke Itou

发明人： Makoto Hataida ,  Toshikazu Ueki ,  Takaharu Ishizuka ,  Takashi Yamamoto ,  Yuka Hosokawa ,  Takeshi Owaki ,  Daisuke Itou

IPC分类号： G06F12/00 ,  G06F13/00 ,  G06F13/28

CPC分类号： G06F12/0822 ,  G06F12/123

摘要： To prevent a decrease in performance of controlling a snoop tag. A queue is stored with REPLACE target WAY information and an index as an entry associated with a REPLACE request received from a processor, the index stored in the queue is compared with an index of a subsequent READ request, and, as a result of the comparison, a process based on the index-coincident READ request is executed with respect to the snoop tag corresponding to a content of a cache memory of the processor. Further, the REPLACE target WAY information of the READ request is replaced with the WAY information in the index-coincident entry within the queue.

摘要翻译： 以防止控制snoop标签的性能下降。 存储REPLACE目标WAY信息和索引作为与从处理器接收到的REPLACE请求相关联的条目的队列，将存储在队列中的索引与后续READ请求的索引进行比较，并且作为比较的结果 相对于与处理器的高速缓冲存储器的内容相对应的窥探标签，执行基于索引一致的READ请求的处理。 此外，READ请求的REPLACE目标WAY信息被队列中符合条件的条目中的WAY信息所替代。