公开(公告)号：US6040648A

公开(公告)日：2000-03-21

申请号：US235671

申请日：1999-01-22

申请人： Naoki Kawawada ,  Hiroaki Namiki ,  Isamu Takehara ,  Tadao Iwaki ,  Takashi Ishida ,  Shinichi Hayashizaki ,  Hirotada Shimaguchi ,  Katsushige Konno

发明人： Naoki Kawawada ,  Hiroaki Namiki ,  Isamu Takehara ,  Tadao Iwaki ,  Takashi Ishida ,  Shinichi Hayashizaki ,  Hirotada Shimaguchi ,  Katsushige Konno

IPC分类号： F16C17/10 ,  F16C33/10 ,  H02K7/08 ,  H02K21/22 ,  H02K29/00 ,  H02K5/16 ,  F16C32/06

CPC分类号： F16C33/107 ,  F16C17/107 ,  H02K7/085

摘要： A spindle motor having a simplified construction with reduced axial and radial deflection while avoiding the half whirl phenomenon includes a motor frame, a rotating shaft supporting a rotor, a stator and stator coil, a permanent magnet opposing the stator, and a liquid dynamic pressure bearing. Magnetic centers of the permanent magnet and stator coil, in the axial direction of the rotating shaft, are substantially matched. The liquid dynamic pressure bearing comprises opposing surfaces of the rotating shaft and the housing. The rotating shaft has a disk-shaped thrust bearing portion disposed in a first portion of a cylindrical hole of the housing, and a radial bearing portion disposed in a second portion of the cylindrical hole. Lubricating oil fills a space between the cylindrical hole and the thrust bearing portion and radial bearing portion, and a presser ring is pressed and fixed into a third portion of the cylindrical hole to seal the bearing. A boss portion of the rotor is fixed to a rotor supporting portion of the rotating shaft so that an inner peripheral surface of the boss portion mates with an outer peripheral surface of the rotor supporting portion. The rotating shaft has three axially-spaced portions, with the disk-shaped thrust bearing portion formed between and having a larger diameter than the other portions. A stage is provided between the thrust bearing portion and the rotor supporting portion to serve as a seat for installation of the boss portion.

摘要翻译： 具有减小的轴向和径向偏转同时避免半旋转现象的简化结构的主轴电机包括马达框架，支撑转子的旋转轴，定子和定子线圈，与定子相对的永磁体以及液体动压轴承 。 永久磁铁和定子线圈在旋转轴的轴向方向上的磁心基本匹配。 液体动压轴承包括旋转轴和壳体的相对表面。 旋转轴具有设置在壳体的圆筒孔的第一部分中的盘形推力轴承部分和设置在圆柱形孔的第二部分中的径向支承部分。 润滑油填充圆柱形孔与推力轴承部分和径向支承部分之间的空间，并且压紧环被压紧并固定到圆柱形孔的第三部分中以密封轴承。 转子的凸台部固定在转轴的转子支承部上，使凸台部的内周面与转子支承部的外周面配合。 旋转轴具有三个轴向间隔开的部分，其中盘形止推轴承部分形成在直径大于其它部分的直径之间。 在推力轴承部分和转子支撑部分之间设置有用作安装凸起部分的座的台架。

公开(公告)号：US06371650B1

公开(公告)日：2002-04-16

申请号：US09414244

申请日：1999-10-07

申请人： Hiromitsu Goto ,  Isamu Takehara ,  Yukihiro Nakayama ,  Ryouji Yoneyama ,  Takafumi Suzuki ,  Toshiharu Kogure ,  Tadao Iwaki ,  Naoki Kawawada ,  Atsushi Ota ,  Koji Nitadori

发明人： Hiromitsu Goto ,  Isamu Takehara ,  Yukihiro Nakayama ,  Ryouji Yoneyama ,  Takafumi Suzuki ,  Toshiharu Kogure ,  Tadao Iwaki ,  Naoki Kawawada ,  Atsushi Ota ,  Koji Nitadori

IPC分类号： F16C3206

CPC分类号： F16C33/74 ,  F16C17/107 ,  F16C33/103 ,  F16C33/107 ,  F16C2370/12 ,  G11B19/2009

摘要： A double sleeve type dynamic bearing comprises a fixed shaft having at least one end fixedly mountable to an apparatus in which the bearing is utilized, a rotary sleeve arranged coaxially with the fixed shaft so that a first fine gap is formed therebetween, a fixed sleeve arranged coaxially with the rotary sleeve so that a second fine gap is formed therebetween, and a lubrication oil filled in the fine gaps. The first fine gap and the second fine gap each have an open end exposed to air outside the bearing and an opposite end that is not exposed to the air, the opposite ends being in communication with each other. A holding member holds the fixed shaft and the fixed sleeve and is disposed adjacent to a lower end surface of the rotary sleeve to form a third fine gap between the holding member and the lower end surface of the rotary sleeve. The third fine gap is formed with a thrust dynamic pressure producing groove, and opposite ends of the first and second fine gaps meet each other through the third fine gap. A peripheral surface of at least one of the fixed shaft, the rotary sleeve and the fixed sleeve forming at least one of the first and second fine gaps has a dynamic pressure producing groove formed therein.

摘要翻译： 一种双套筒式动态轴承，包括固定轴，该固定轴具有固定地安装到使用轴承的装置的至少一个端部，与固定轴同轴设置的旋转套筒，使得在其间形成有第一细小间隙，固定套筒布置 与旋转套筒同轴，从而在它们之间形成第二细微间隙，并且填充有细小间隙的润滑油。 第一细间隙和第二细间隙各自具有暴露于轴承外部的空气的开口端和不暴露于空气的相对端，相对端彼此连通。 保持构件保持固定轴和固定套筒并且邻近旋转套筒的下端表面设置，以在保持构件和旋转套筒的下端表面之间形成第三细微间隙。 第三细间隙由推力动压产生槽形成，第一和第二细缝的相对端通过第三细间隙相互相交。 固定轴，旋转套筒和形成第一和第二细小间隙中的至少一个的固定套筒中的至少一个的周面具有形成在其中的动压产生槽。

公开(公告)号：US06371649B1

公开(公告)日：2002-04-16

申请号：US09420172

申请日：1999-10-18

申请人： Naoki Kawawada ,  Tadao Iwaki ,  Atsushi Ota ,  Koji Nitadori ,  Toshiharu Kogure ,  Hiromitsu Goto ,  Isamu Takehara ,  Yukihiro Nakayama ,  Ryoji Yoneyama ,  Takahumi Suzuki

发明人： Naoki Kawawada ,  Tadao Iwaki ,  Atsushi Ota ,  Koji Nitadori ,  Toshiharu Kogure ,  Hiromitsu Goto ,  Isamu Takehara ,  Yukihiro Nakayama ,  Ryoji Yoneyama ,  Takahumi Suzuki

IPC分类号： F16C1710

CPC分类号： F16C33/1025 ,  B60K6/365 ,  B60K6/445 ,  B60W10/06 ,  B60W10/08 ,  B60W10/26 ,  B60W20/00 ,  F16C33/10 ,  F16C33/107 ,  F16N2210/14 ,  H02K15/14 ,  Y02T10/6239 ,  Y02T10/6286 ,  Y10S903/903 ,  Y10S903/91

摘要： A method for lubricating a part without leaving air bubbles includes the steps of assembling components so that an open end is formed for application of lubricating fluid and a fluid path is provided through which the lubricating fluid is to be circulated, introducing the lubricating fluid into the open end and applying a centrifugal force to the component by moving the component about a circular path so that the centrifugal force causes the lubricating fluid to be urged throughout the fluid path. The method is used in an embodiment to lubricate a dynamic pressure bearing having a gap between relatively moving parts. The gap has an open end into which the lubrication fluid is dripped and a closed end. During movement of the bearing about a circular path, the fluid is urged from the open end to the closed end.

摘要翻译： 用于在不留下气泡的情况下润滑部件的方法包括组装部件的步骤，以形成用于施加润滑流体的开口端，并且提供流体路径，通过该流体路径润滑流体将被循环，将润滑流体引入到 开口端并通过围绕圆形路径移动部件而向组件施加离心力，使得离心力使润滑流体在整个流体路径中被推动。 在一个实施例中使用该方法来润滑在相对运动部件之间具有间隙的动压轴承。 间隙具有打开的端部，润滑液滴入其中并且封闭的端部。 在轴承围绕圆形路径移动期间，流体从开口端向封闭端被推动。

公开(公告)号：US06354742B1

公开(公告)日：2002-03-12

申请号：US09535376

申请日：2000-03-24

申请人： Tadao Iwaki ,  Shigeru Ohki ,  Naoki Kawawada ,  Atsushi Ohta ,  Koji Nitadori ,  Isamu Takehara ,  Hiromitsu Goto ,  Takafumi Suzuki

发明人： Tadao Iwaki ,  Shigeru Ohki ,  Naoki Kawawada ,  Atsushi Ohta ,  Koji Nitadori ,  Isamu Takehara ,  Hiromitsu Goto ,  Takafumi Suzuki

IPC分类号： F16C3206

CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C2370/12 ,  G11B19/2009 ,  H02K5/1675

摘要： In order to alleviate mutual interference between axial dynamic pressure portions and a radial dynamic pressure portion in a ring-like hydraulic dynamic pressure bearing, in the case of a ring-like hydraulic dynamic pressure bearing 1 constituted by supporting a shaft portion 4 constituted by fixing a ring 3 to an end portion 2A of a shaft main body 2 by a bearing portion 5, ring-like spaces 8 and 9 for storing lubricant for generating dynamic pressure are provided along contiguous portions of the radial dynamic pressure bearing portion and the axial dynamic pressure bearing portions formed between the ring 3 and the bearing portion 5, and the ring-like spaces 8 and 9 are maintained at atmospheric pressure via paths formed at the bearing portion 5 to thereby prevent negative pressure from generating at boundary regions of the two dynamic pressure bearing portions.

摘要翻译： 为了减轻环状液压动压轴承中的轴向动压部和径向动压部之间的相互干扰，在环状液压动压轴承1的情况下，通过将由固定构成的轴部4 通过轴承部分5将轴3连接到轴主体2的端部2A，在径向动压轴承部分和轴向动力学的连续部分设置有用于产生动压的用于存储润滑剂的环形空间8和9 形成在环3与轴承部5之间的压力轴承部以及环状空间8,9通过形成于轴承部5的路径而保持在大气压下，从而防止在两个动态的边界区域产生负压 承压部。

公开(公告)号：US06307291B1

公开(公告)日：2001-10-23

申请号：US09414243

申请日：1999-10-07

申请人： Tadao Iwaki ,  Isamu Takehara ,  Yukihiro Nakayama ,  Ryouji Yoneyama ,  Takafumi Suzuki ,  Toshiharu Kogure ,  Hiromitsu Goto ,  Naoki Kawawada ,  Atsushi Ota ,  Koji Nitadori

发明人： Tadao Iwaki ,  Isamu Takehara ,  Yukihiro Nakayama ,  Ryouji Yoneyama ,  Takafumi Suzuki ,  Toshiharu Kogure ,  Hiromitsu Goto ,  Naoki Kawawada ,  Atsushi Ota ,  Koji Nitadori

IPC分类号： H02K516

CPC分类号： F16C33/107 ,  F16C17/045 ,  F16C17/107 ,  F16C2370/12 ,  G11B19/2009 ,  H02K5/1677 ,  H02K7/086

摘要： The present invention is a double sleeve type fluid dynamic pressure bearing, comprising a fixed shaft having respective ends to be fixed to a utilized apparatus; a rotary sleeve arranged to provide a first fine gap between an inner peripheral surface thereof and an outer peripheral surface of the fixed shaft, a fixed sleeve arranged to provide a second fine gap between an inner peripheral surface thereof and an outer peripheral surface of the rotary sleeve, a holder member arranged to cooperate with a lower end surface of the rotary sleeve to provide a third gap, and wherein the first fine gap and the second fine gap are formed with radial dynamic pressure producing grooves while the third fine gap is formed with a thrust dynamic pressure producing groove, the first, second and third fine gaps being filled with lubrication oil, the first fine gap and the second fine gap having one ends made as opening ends contacting with the air and the other ends made as closed ends communicated with each other through the third fine gap.

摘要翻译： 本发明是一种双套筒式流体动压轴承，其特征在于，包括一固定轴，该固定轴具有固定在所使用的装置上的各自端部; 旋转套筒，其布置成在其内周表面和固定轴的外周表面之间提供第一细微间隙;固定套筒，其布置成在其内周表面和旋转体的外周表面之间提供第二细微间隙 套筒，配置成与旋转套筒的下端面协作以提供第三间隙的保持器构件，并且其中第一细间隙和第二细间隙形成有径向动压产生槽，而第三细间隙形成有 推力动压产生槽，第一，第二和第三细间隙填充有润滑油，第一细间隙和第二细间隙具有一端，其开口端与空气接触，另一端形成为封闭端连通 相互通过第三个细微差距。

公开(公告)号：US06247848B1

公开(公告)日：2001-06-19

申请号：US09535377

申请日：2000-03-24

申请人： Tadao Iwaki ,  Shigeru Ohki ,  Naoki Kawawada ,  Atsushi Ohta ,  Koji Nitadori ,  Isamu Takehara ,  Hiromitsu Goto ,  Takafumi Suzuki

发明人： Tadao Iwaki ,  Shigeru Ohki ,  Naoki Kawawada ,  Atsushi Ohta ,  Koji Nitadori ,  Isamu Takehara ,  Hiromitsu Goto ,  Takafumi Suzuki

IPC分类号： F16C1710

CPC分类号： F16C33/107 ,  F16C17/107 ,  F16C33/103 ,  F16C33/74

摘要： A hydraulic dynamic bearing has a rotational assembly and a bearing member for rotationally supporting the rotational assembly. The bearing member has a main body having a recess portion and a cover for covering an open end of the recess portion. The rotational assembly has a shaft main body having an end portion extending into the recess of the bearing main body for undergoing rotation relative thereto and a ring member disposed in the recess of the bearing main body. The ring member is connected to the end portion of the shaft main body for rotation therewith. Axial dynamic pressure generating grooves are formed in upper and lower surface portions of the ring member for generating axial dynamic pressure during rotation of the rotational assembly. Radial dynamic pressure generating grooves are formed in an outer peripheral surface portion of the ring member for generating radial dynamic pressure during rotation of the rotational assembly. Spaces are formed between the bearing member and the rotational assembly for storing a lubricant.

摘要翻译： 液压动态轴承具有旋转组件和用于旋转地支撑旋转组件的支承构件。 所述轴承构件具有主体，所述主体具有凹部和覆盖所述凹部的开口端的盖。 旋转组件具有轴主体，其具有延伸到轴承主体的凹部中的端部，用于相对于其旋转，并且环构件设置在轴承主体的凹部中。 环构件连接到轴主体的端部以与其一起旋转。 轴向动压产生槽形成在环件的上表面和下表面部分中，用于在旋转组件转动期间产生轴向动压。 径向动压产生槽形成在环件的外周表面部分中，用于在旋转组件旋转期间产生径向动压。 在轴承构件和用于储存润滑剂的旋转组件之间形成空间。

公开(公告)号：US5821647A

公开(公告)日：1998-10-13

申请号：US760450

申请日：1996-12-06

申请人： Isamu Takehara ,  Hirotada Shimaguchi ,  Masashi Ogawa

发明人： Isamu Takehara ,  Hirotada Shimaguchi ,  Masashi Ogawa

IPC分类号： G02B26/12 ,  H02K5/16 ,  H02K7/14 ,  H02K21/14 ,  H02K29/00 ,  H02K29/08 ,  H04N1/113 ,  H02K7/00 ,  G02B26/08

CPC分类号： H02K5/161 ,  G02B26/121 ,  H02K7/14 ,  H02K21/14 ,  H02K2205/12 ,  H02K29/08

摘要： A spindle motor comprises a rotational member supported by bearings for rotation about a rotational axis, a rotational body and a motor rotor mounted on the rotational member for rotation therewith, and a motor stator mounted around the motor rotor. The rotational body has an outer diameter determined so that a windage loss of the rotational body is proportional to the third power of a peripheral velocity of the rotational body and an air gap diameter of the bearings and the diameter of the motor stator are determined so that the air loss of each of the bearings and the motor rotor is proportional to the square of the peripheral velocity of each of the bearings and the motor rotor at a range of constant speed of rotation of the rotational member.

摘要翻译： 主轴电动机包括由围绕旋转轴线旋转的轴承支撑的旋转构件，安装在旋转构件上用于旋转的旋转体和电动机转子以及围绕电动机转子安装的电动机定子。 旋转体具有确定的外径，使得旋转体的风阻损失与旋转体的圆周速度的第三功率成正比，并且确定轴承的气隙直径和电动机定子的直径，使得 每个轴承和电动机转子的空气损失与旋转构件的恒定转速范围内的每个轴承和电动机转子的圆周速度的平方成正比。

公开(公告)号：US5804896A

公开(公告)日：1998-09-08

申请号：US575144

申请日：1995-12-19

申请人： Isamu Takehara ,  Masashi Ogawa ,  Hirotada Shimaguchi

发明人： Isamu Takehara ,  Masashi Ogawa ,  Hirotada Shimaguchi

IPC分类号： H02K1/16 ,  H02K3/04 ,  H02K3/12 ,  H02K3/28 ,  H02K21/14 ,  H02K29/03 ,  H02K7/00 ,  H02K11/00

CPC分类号： H02K21/14 ,  H02K1/165 ,  H02K29/03 ,  H02K3/12 ,  H02K3/28

摘要： A spindle motor comprises a permanent magnet having an outer diameter, an outer circumference, and a number of poles. A stator core is disposed around and spaced from the outer circumference of the permanent magnet rotor. The stator core has a yoke portion, a number of lengthwise extending and circumferentially spaced slots, and a tooth portion between each adjacent two of the slots. The slots are disposed in close proximity to the outer circumference of the permanent magnet rotor, and a width of each of the slots in a radial direction of the stator core is smaller than a width of the yoke portion and equal to or greater than 1/20 of the outer diameter of the permanent magnet rotor. A coil has two or less turns and is comprised of a conductor disposed in the slots of the stator core.

摘要翻译： 主轴电动机包括具有外径，外周和极数的永磁体。 定子芯设置在永久磁铁转子的外周周围并与其隔开。 定子铁芯具有轭部分，多个纵向延伸且周向间隔开的槽，以及每个相邻两个槽之间的齿部分。 狭槽设置在紧邻永磁转子的外圆周的位置，并且每个槽在定子铁芯的径向上的宽度小于轭部的宽度并等于或大于+ E ，为永磁转子外径的1/20 + EE。 线圈具有两个或更少的匝，并且由设置在定子芯的槽中的导体构成。

公开(公告)号：US06176618B1

公开(公告)日：2001-01-23

申请号：US09215723

申请日：1998-12-18

申请人： Naoki Kawawada ,  Isamu Takehara

发明人： Naoki Kawawada ,  Isamu Takehara

IPC分类号： F16C3206

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

摘要： A spindle motor has a rotor, a stator and a dynamic pressure bearing for supporting the rotor for rotation relative to the stator. The dynamic pressure bearing comprises a rotational shaft mounted for undergoing rotation and having a thrust bearing portion and a radial bearing portion. A bearing member rotatably supports the rotational shaft and has a closed end forming a small diameter cylinder portion for receiving the radial bearing portion of the rotational shaft and an open end forming a large diameter cylinder portion for receiving the thrust bearing portion of the rotational shaft such that first gaps for receiving a lubricating oil are formed between the rotational shaft and the bearing member. A thrust pressure member is connected to the bearing member to form a capillary seal between the rotational shaft and the open end of the bearing member and to form second gaps between the thrust pressure member and the rotational shaft for receiving a lubricating oil. An oil receiving groove is formed in at least one of the thrust pressure member and the rotational shaft for receiving a lubricating oil.

摘要翻译： 主轴电机具有转子，定子和用于支撑转子相对于定子旋转的动压轴承。 动压轴承包括安装成用于转动并具有止推轴承部分和径向轴承部分的旋转轴。 轴承构件可旋转地支撑旋转轴并且具有形成用于接收旋转轴的径向轴承部分的小直径圆筒部分的封闭端和形成用于接收旋转轴的推力轴承部分的大直径圆筒部分的开口端， 用于接收润滑油的第一间隙形成在旋转轴和支承构件之间。 推力加压构件连接到轴承构件，以在旋转轴和轴承构件的开口端之间形成毛细管密封，并且在推力构件和旋转轴之间形成用于接收润滑油的第二间隙。 在止推压力构件和旋转轴中的至少一个中形成油接收槽，用于接收润滑油。

公开(公告)号：US07307364B2

公开(公告)日：2007-12-11

申请号：US10549297

申请日：2003-03-19

申请人： Isamu Takehara ,  Shinji Kinoshita

发明人： Isamu Takehara ,  Shinji Kinoshita

IPC分类号： H02K5/16

CPC分类号： F16C33/107 ,  F16C17/026 ,  F16C17/10 ,  F16C2370/12 ,  G11B19/2009 ,  H02K7/085

摘要： The invention provides a motor that is provided with a fluid dynamic bearing for rotatably supporting a shaft body, by the dynamic pressure of fluid filling a clearance between itself and a shaft body support part. The motor is provided with: a stator having cores and coils; a rotor having permanent magnets arranged in a ring shape on the radial inner side of the stator, facing the cores and coils; and a fluid dynamic bearing which rotatably supports the rotor with respect to the stator. The fluid dynamic bearing is provided with: a cylindrical shaft body whose cross section is approximately cruciform; a shaft body support part, in which a shaft body insertion hole is formed for accommodating the shaft body; and a fluid which is filled into a clearance formed between the shaft body and the shaft body insertion hole, and there is provided a dynamic pressure generation unit comprising the fluid, and dynamic pressure generating grooves formed in at least one of the outer face of the shaft body, and the inner face of the shaft body insertion hole facing this outer face.

摘要翻译： 本发明提供了一种电动机，其具有用于可旋转地支撑轴体的流体动力轴承，通过填充其本身与轴体支撑部分之间的间隙的流体的动态压力。 电动机设有：具有铁芯和线圈的定子; 具有永磁体的转子，该永磁体以定子的径向内侧布置成环形，面对所述芯和线圈; 以及相对于定子可旋转地支撑转子的流体动力轴承。 流体动力轴承设有：截面近似十字形的圆柱形轴体; 轴体支撑部，其中形成有用于容纳所述轴体的轴体插入孔; 以及填充在轴体和轴体插入孔之间形成的间隙中的流体，并且设置有包括流体的动压产生单元和形成在所述轴体的至少一个的动压生成槽 轴体和轴体插入孔的面向该外表面的内表面。