公开(公告)号：US20130266463A1

公开(公告)日：2013-10-10

申请号：US13439440

申请日：2012-04-04

Applicant: Mitsuo KODAMA ,  Taketo Nonaka ,  Akira Nishio

Inventor： Mitsuo KODAMA ,  Taketo Nonaka ,  Akira Nishio

IPC: F04D25/06

CPC classification number: F04D25/0613 ,  F04D29/329 ,  F04D29/646

Abstract: A fan motor includes a static body, a rotating body that has a shaft, a hub encircling a first end of the shaft and joined with the first end, and a blade joined around an outer periphery of the hub, a sleeve that retains thereinside a portion of the shaft at a second end side, a rotating flange which encircles the sleeve and which rotates together with the hub, a static flange which is disposed in an area at a side of the first end of the shaft, and which is joined with the static body so as to overlap the rotating flange in a radial direction, a dynamic pressure generating groove provided in either one of surfaces of the static body and the rotating body facing with each other in the axial direction, and a lubricant present between the static body and the rotating body.

Abstract translation: 风扇电动机包括静止体，具有轴的旋转体，环绕轴的第一端并与第一端连接的轮毂，以及围绕轮毂的外周连接的叶片，保持在其外侧的套筒 所述轴的第二端侧的部分，环绕所述套筒并与所述毂一起旋转的旋转凸缘，设置在所述轴的所述第一端侧的区域中的静态凸缘，并且其与 所述静止体沿径向与所述旋转凸缘重叠，设置在所述静止体的所述表面和所述旋转体的轴向方向上彼此相对的表面中的任一个中的动压生成槽以及静态 身体和旋转体。

公开(公告)号：US20110181986A1

公开(公告)日：2011-07-28

申请号：US12969194

申请日：2010-12-15

Applicant: Mitsuo KODAMA ,  Yoshio KUROKAWA

Inventor： Mitsuo KODAMA ,  Yoshio KUROKAWA

IPC: G11B5/60

CPC classification number: G11B19/2045 ,  F16C17/107 ,  F16C33/74 ,  F16C2370/12 ,  G11B19/2036 ,  H02K5/1675 ,  H02K7/09

Abstract: In a disk drive device, a hub has an outer circumferential wall portion configured to hold a recording disk. A base member has a cylindrical portion, whose central axis is the rotation axis of the hub, on a surface on the side of the hub. A fluid dynamic bearing holds a lubricant and rotatably supports the hub relative to the base member. A ring-shaped attraction plate including a magnetic material is fixed to the base member and faces a magnet in the axial direction. The outer circumferential wall portion is configured such that the outer circumferential wall portion surrounds the attraction plate and that the range of the outer circumferential wall portion in the axial direction overlaps with the range of the attraction plate in the axial direction.

Abstract translation: 在盘驱动装置中，轮毂具有配置成保持记录盘的外周壁部。 基座部件具有在轮毂一侧的表面上的中心轴线是轮毂的旋转轴线的圆筒部。 流体动力轴承保持润滑剂并相对于基座构件可旋转地支撑毂。 包括磁性材料的环形吸引板固定在基体上并且在轴向上面向磁体。 外周壁部构成为，外周壁部围绕吸引板，外周壁部的轴向的范围与吸引板的轴向的范围重叠。

公开(公告)号：US20110109995A1

公开(公告)日：2011-05-12

申请号：US12616110

申请日：2009-11-10

Applicant: Mitsuo KODAMA ,  Takuji YAMADA ,  Hiroyuki ANZAI

Inventor： Mitsuo KODAMA ,  Takuji YAMADA ,  Hiroyuki ANZAI

IPC: G11B5/60 ,  C07C69/34 ,  C10M105/36 ,  C10M137/04

CPC classification number: G11B19/2009 ,  C10M105/38 ,  C10M2207/026 ,  C10M2207/2835 ,  C10M2207/289 ,  C10M2215/064 ,  C10M2223/04 ,  C10M2223/049 ,  C10N2230/02 ,  C10N2240/204

Abstract: A bearing lubricant includes a base oil containing an ester compound consisting of 2-ethyl-2-methyl-1,3-propanediol and at least one of carboxylic acids having 5 to 12 carbon atoms, the ester compound being represented by the following formula (1), in which the base oil has a kinetic viscosity at approximately 40° C. of approximately 7 to 15 mPa, and has a pour point of approximately −60° C. or less: where R1 and R2 represent hydrocarbon groups having 4 to 11 carbon atoms.

Abstract translation: 轴承润滑剂包括含有由2-乙基-2-甲基-1,3-丙二醇和至少一种碳原子数为5〜12的羧酸组成的酯化合物的基础油，该酯化合物由下式（ 1），其中基油在约40℃下的动力粘度为约7至15mPa，并且具有约-60℃或更低的倾点：其中R1和R2表示具有4〜 11个碳原子。

公开(公告)号：US20110255191A1

公开(公告)日：2011-10-20

申请号：US13079963

申请日：2011-04-05

Applicant: Takanori WATANABE ,  Mitsuo KODAMA ,  Hiroshi IWAI ,  Akira NISHIO

Inventor： Takanori WATANABE ,  Mitsuo KODAMA ,  Hiroshi IWAI ,  Akira NISHIO

IPC: G11B17/02 ,  G11B5/127

CPC classification number: H02K3/28 ,  G11B17/0287 ,  G11B19/2009 ,  G11B25/043 ,  H02K3/18 ,  H02K5/1675 ,  H02K21/22

Abstract: A disk drive device includes a base member; a hub on which a recording disk is placed; a bearing unit arranged on the base member for rotatably supporting the hub; and a spindle drive unit for rotationally driving the hub, wherein the spindle drive unit includes a stator core having salient poles, a coil wound around each of the salient poles, and a magnet having a plurality of magnetic poles arranged in a circumferential direction opposed to the salient poles, the hub includes an outer cylindrical portion formed of a magnetic material and engaged with an inner periphery of the recording disk, and an inner cylindrical portion fixing an outer periphery of the magnet, the number of magnetic poles is an even number in a range of 10 to 16, and the number of salient poles is a multiple of 3 in a range of 12 to 24.

Abstract translation: 磁盘驱动装置包括：基座部件; 记录盘放置在其上的集线器; 轴承单元，布置在所述基座构件上，用于可旋转地支撑所述轮毂; 以及用于旋转驱动轮毂的主轴驱动单元，其中所述主轴驱动单元包括具有凸极的定子芯，围绕每个所述凸极的线圈，以及具有沿与所述凸极相对的周向方向布置的多个磁极的磁体 凸极包括由磁性材料形成并与记录盘的内周接合的外圆柱形部分和固定磁铁外周的内圆柱形部分，磁极数量为偶数 范围为10〜16，凸极数为12〜24的3的倍数。

公开(公告)号：US20110064341A1

公开(公告)日：2011-03-17

申请号：US12842877

申请日：2010-07-23

Applicant: Masafumi MIZUNO ,  Mitsuo KODAMA ,  Hiroshi IWAI

Inventor： Masafumi MIZUNO ,  Mitsuo KODAMA ,  Hiroshi IWAI

IPC: G11B17/02 ,  F16C32/06 ,  B26D1/00 ,  H04R17/00 ,  B23B3/00

CPC classification number: F16C33/745 ,  B23B5/00 ,  B23B2260/108 ,  F16C17/026 ,  F16C17/107 ,  F16C33/107 ,  F16C2240/40 ,  F16C2370/12 ,  G11B19/2036 ,  Y10T29/42 ,  Y10T82/10 ,  Y10T83/04

Abstract: A disk drive device includes: a hub on which a recording disk is to be mounted; a shaft; a sleeve configured to house the shaft and to be rotatable relatively with respect to the shaft; a radial space portion formed between the inner circumferential surface of the sleeve and the outer circumferential surface of the shaft; a radial dynamic pressure generating portion configured to generate radial dynamic pressure between at least part of the inner circumferential surface of the sleeve and the outer circumferential surface of the shaft in the radial space portion; and lubricant. The axial length of the radial dynamic pressure generating portion is formed to be longer than the diameter of the radial dynamic pressure generating portion such that radial dynamic pressure, which is defined with the axial length of the radial dynamic pressure generating portion and the diameter thereof being parameters, is greater than or equal to a predetermined minimum reference value.

Abstract translation: 磁盘驱动器装置包括：记录盘安装在其上的集线器; 轴; 套筒，其构造成容纳所述轴并能相对于所述轴相对旋转; 形成在所述套筒的内周面与所述轴的外周面之间的径向空间部; 径向动压产生部，被构造成在所述径向空间部中的所述套筒的内周面的至少一部分与所述轴的外周面之间产生径向动压; 和润滑剂。 径向动压产生部分的轴向长度形成为比径向动压产生部分的直径长，使得径向动压力由径向动压产生部分的轴向长度和其直径限定 参数大于或等于预定的最小参考值。

公开(公告)号：US20100195248A1

公开(公告)日：2010-08-05

申请号：US12576179

申请日：2009-10-08

Applicant: Takuji YAMADA ,  Yuji OMURA ,  Mitsuo KODAMA

Inventor： Takuji YAMADA ,  Yuji OMURA ,  Mitsuo KODAMA

IPC: G11B5/10

CPC classification number: G11B33/02 ,  F16C17/107 ,  F16C33/107 ,  F16C33/745 ,  F16C2370/12 ,  G11B19/2036 ,  H02K5/1675

Abstract: A sleeve supports a shaft. A housing member is arranged so as to surround the sleeve and make the end of the sleeve protrude. A base member holds the housing member and fixes a stator core so as to surround the housing member. A hub drives a recording disk by being rotated integrally with the shaft, with a magnet being fixed to an annular portion concentric with the shaft so as to face the stator core fixed to the base member. A thrust member is rotated integrally with the hub, and a descender portion and a ring portion.

Abstract translation: 套筒支撑轴。 壳体构件被布置成围绕套筒并使套筒的端部突出。 基座构件保持壳体构件并固定定子芯以围绕壳体构件。 轮毂通过与轴一体地旋转而驱动记录盘，其中磁体被固定到与轴同心的环形部分，以面对固定到基座构件的定子芯。 推力构件与毂一体旋转，下降部分和环部分。

公开(公告)号：US20130322793A1

公开(公告)日：2013-12-05

申请号：US13488865

申请日：2012-06-05

Applicant: Mitsuo KODAMA ,  Taketo Nonaka ,  Masafumi Mizuno

Inventor： Mitsuo KODAMA ,  Taketo Nonaka ,  Masafumi Mizuno

IPC: F16C32/06

CPC classification number: F16C32/0659 ,  F16C17/107 ,  F16C33/107 ,  F16C33/745 ,  F16C2370/12

Abstract: A rotating device includes a shaft body having a shaft, a first flange extending in the radial direction from the side face of the shaft, and a second flange extending outwardly of the radial direction from another end side, a freely rotatable bearing body including a shaft encircling member present between the second flange and the first flange in the axial direction, a radial dynamic pressure generating groove provided in either one of the shaft and the shaft encircling member, a first thrust dynamic pressure generating groove provided in either one of the first flange and the shaft encircling member, and a lubrication medium. An end of the region where the radial dynamic pressure generating groove is formed and which is distant from the second flange is located outwardly of the region where the first thrust dynamic pressure generating groove is disposed in the axial direction.

Abstract translation: 旋转装置包括轴体，其具有轴，从轴的侧面沿径向延伸的第一凸缘和从另一端侧向径向外延伸的第二凸缘，包括轴的自由旋转的轴承体 在轴向上存在于第二凸缘和第一凸缘之间的环绕构件，设置在轴和轴环绕构件中的任一个中的径向动压产生槽，设置在第一凸缘中的任一个中的第一推力动压生成槽 和轴环绕构件，以及润滑介质。 形成径向动压产生槽并且远离第二凸缘的区域的一端位于第一推力动压生成槽沿轴向设置的区域的外侧。

公开(公告)号：US20120049678A1

公开(公告)日：2012-03-01

申请号：US13196774

申请日：2011-08-02

Applicant: Mitsuo KODAMA

Inventor： Mitsuo KODAMA

IPC: H02K5/167 ,  H02K15/00

CPC classification number: H02K3/522 ,  G11B19/2009 ,  H02K29/03 ,  H02K2201/03 ,  Y10T29/49009

Abstract: In a rotating machine, a base is configured such that a housing space is formed by joining a cover to the base and has a bearing hole communicating ambient air and the housing space. A sleeve is fitted into the bearing hole and formed with a porous material. The circumferential lower end portion of the sleeve is exposed to ambient air from the bearing hole. At least part of the pores on the surface of the circumferential lower end portion in contact with ambient air are filled in.

Abstract translation: 在旋转机器中，基座被构造成使得通过将盖连接到基座并具有连通环境空气的轴承孔和容纳空间来形成容纳空间。 套筒装配在轴承孔中并形成多孔材料。 套筒的周向下端部从轴承孔暴露于环境空气。 周围下端部与外界空气接触的表面的至少一部分孔被填充。

公开(公告)号：US20110033144A1

公开(公告)日：2011-02-10

申请号：US12852425

申请日：2010-08-06

Applicant: Mitsuo KODAMA

Inventor： Mitsuo KODAMA

IPC: F16C32/06

CPC classification number: G11B19/2036 ,  F16C17/026 ,  F16C17/107 ,  F16C33/107 ,  F16C2240/30 ,  F16C2240/34 ,  F16C2240/40 ,  F16C2370/12

Abstract: In a disk drive device according to an embodiment, radial dynamic pressure corresponding portions are structured such that the diameters thereof expand toward the axial outside of the sleeve, and that the shaft is in surface-contact with each of the radial dynamic pressure corresponding portions when the rotational drive of the disk drive device is stopped. Further, a herringborn-shaped radial dynamic pressure groove is formed in each of the radial dynamic pressure corresponding portions. The radial dynamic pressure groove in each radial dynamic pressure corresponding portion is formed such that the axial outside length from the turned-back portion of the herringborn-shape is longer than the axial inside length therefrom.

Abstract translation: 在根据实施例的磁盘驱动装置中，径向动压对应部分被构造成使得其直径朝向套筒的轴向外侧扩展，并且轴与每个径向动态压力对应部分表面接触， 磁盘驱动装置的旋转驱动停止。 此外，在每个径向动态压力对应部分中形成有环状的径向动压槽。 每个径向动态压力对应部分中的径向动压槽形成为使得从轮辋形状的折返部分的轴向外部长度比其长度大。

公开(公告)号：US20100239194A1

公开(公告)日：2010-09-23

申请号：US12723481

申请日：2010-03-12

Applicant: Mitsuo KODAMA

Inventor： Mitsuo KODAMA

IPC: F16C32/06

CPC classification number: H02K7/085 ,  F16C17/107 ,  F16C2370/12 ,  G11B19/2036

Abstract: A disk drive device includes a base member, a hub member, a shaft, a flange, a sleeve, a thrust dynamic pressure generation portion including thrust dynamic pressure grooves such that thrust dynamic pressure is generated in a thrust space, a radial dynamic pressure generation portion including radial dynamic pressure grooves such that radial dynamic pressure is generated in a radial space, a lubricant filled in the thrust space in the thrust dynamic pressure generation portion and the radial space in the radial dynamic pressure generation portion, a capillary seal portion for holding the lubricant in the thrust space and the radial space, and a circulation pathway by which the thrust dynamic pressure generation portion and the radial dynamic pressure generation portion communicate with each other in order to circulate the lubricant. At least one of the areas among where the thrust dynamic pressure groove is formed and where the radial dynamic pressure groove is formed is made of an impact absorption body with a coefficient of elasticity less than or equal to 20 GPa.

Abstract translation: 磁盘驱动装置包括基座构件，轮毂构件，轴，凸缘，套筒，推力动压产生部分，其包括在推力空间中产生推力动压力的推力动压力槽，径向动压产生 包括径向动压槽的部分，使得在径向空间中产生径向动态压力，填充在推力动压产生部分中的推力空间中的润滑剂和径向动压产生部分中的径向空间;毛细管密封部分，用于保持 推力空间和径向空间中的润滑剂以及推力动压产生部分和径向动压产生部分相互连通以使润滑剂循环的循环通道。 其中形成推力动压槽的区域和形成径向动压槽的区域中的至少一个由具有小于或等于20GPa的弹性系数的冲击吸收体构成。