JP2010176776A5 - - Google Patents

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Publication number
JP2010176776A5
JP2010176776A5 JP2009020953A JP2009020953A JP2010176776A5 JP 2010176776 A5 JP2010176776 A5 JP 2010176776A5 JP 2009020953 A JP2009020953 A JP 2009020953A JP 2009020953 A JP2009020953 A JP 2009020953A JP 2010176776 A5 JP2010176776 A5 JP 2010176776A5
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JP
Japan
Prior art keywords
hub
drive device
disk drive
sleeve
housing member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
JP2009020953A
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Japanese (ja)
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JP4861441B2 (en
JP2010176776A (en
Filing date
Publication date
Application filed filed Critical
Priority to JP2009020953A priority Critical patent/JP4861441B2/en
Priority claimed from JP2009020953A external-priority patent/JP4861441B2/en
Priority to US12/576,179 priority patent/US8243383B2/en
Publication of JP2010176776A publication Critical patent/JP2010176776A/en
Publication of JP2010176776A5 publication Critical patent/JP2010176776A5/ja
Application granted granted Critical
Publication of JP4861441B2 publication Critical patent/JP4861441B2/en
Priority to US13/530,344 priority patent/US8427778B2/en
Priority to US13/850,191 priority patent/US8665556B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Claims (10)

シャフトを支承する筒状のスリーブと、
前記スリーブを環囲し、かつ前記スリーブの端部を突出させるように配置された筒状のハウジング部材と、
前記ハウジング部材を保持するとともに、前記ハウジング部材を環囲するようにステータコアを固着するベース部材と、
前記ベース部材に固着されたステータコアに対向するように、前記シャフトと同心の環状部にマグネットを固着することによって、前記シャフトと一体的に回転して、記録ディスクを駆動させるハブと、
前記ハブと一体的に回転する筒状のスラスト部材とを備え、
前記スリーブは、ハブ側端において、外径方向に延在されたフランジを有し、当該フランジと、前記ハウジング部材のハブ側端との間に環状の第１領域部を形成し、
前記ベース部材は、前記ハウジング部材の外周側に環状の第２領域部を形成し、
前記スラスト部材は、前記スリーブを環囲するリング部と、前記ハウジング部材を環囲する下垂部とを有し、前記リング部は、前記ハブに形成されたハブ側筒状壁の内壁に固着され、かつ第１領域部内で回転し、前記下垂部は、前記リング部の外縁部分に結合されるとともに前記ハブ側筒状壁の内壁に固着され、かつ第２領域部内で回転し、
前記ハウジング部材と前記スラスト部材との間と、前記スリーブのフランジと前記ハブとの間には、潤滑剤が介在されていることを特徴とするディスク駆動装置。 A cylindrical sleeve that supports the shaft;
A cylindrical housing member arranged so as to surround the sleeve and project an end of the sleeve;
A base member for holding the housing member and fixing a stator core so as to surround the housing member;
A hub that rotates integrally with the shaft and drives a recording disk by fixing a magnet to an annular portion concentric with the shaft so as to face the stator core fixed to the base member;
A cylindrical thrust member that rotates integrally with the hub,
The sleeve has a flange extending in an outer diameter direction at a hub side end, and forms an annular first region between the flange and the hub side end of the housing member;
The base member forms an annular second region on the outer peripheral side of the housing member,
The thrust member includes a ring portion that surrounds the sleeve and a hanging portion that surrounds the housing member, and the ring portion is fixed to an inner wall of a hub-side cylindrical wall formed in the hub. And the rotating portion is coupled to the outer edge portion of the ring portion and fixed to the inner wall of the hub-side cylindrical wall, and is rotated within the second region portion,
2. A disk drive device according to claim 1, wherein a lubricant is interposed between the housing member and the thrust member, and between the flange of the sleeve and the hub. 前記スラスト部材は、金属材料のプレス加工によって形成されていることを特徴とする請求項１に記載のディスク駆動装置。   The disk drive device according to claim 1, wherein the thrust member is formed by pressing a metal material. 前記スラスト部材のリング部では、前記スリーブのフランジに対向した壁と、前記ハウジング部材のハブ側端に対向した壁との少なくともひとつに、スラスト動圧を発生させるためのスラスト動圧溝がプレス加工によって形成されていることを特徴とする請求項２に記載のディスク駆動装置。   In the ring portion of the thrust member, a thrust dynamic pressure groove for generating thrust dynamic pressure is pressed in at least one of a wall facing the flange of the sleeve and a wall facing the hub side end of the housing member. The disk drive device according to claim 2, wherein the disk drive device is formed by: 前記スラスト部材は、プラスチック材料により形成されていることを特徴とする請求項１に記載のディスク駆動装置。   2. The disk drive device according to claim 1, wherein the thrust member is made of a plastic material. 前記スラスト部材の下垂部の内壁は、Ｒｙ１．６以下の表面粗度になるように形成されていることを特徴とする請求項１から４のいずれかに記載のディスク駆動装置。   5. The disk drive device according to claim 1, wherein an inner wall of a hanging portion of the thrust member is formed to have a surface roughness of Ry 1.6 or less. 前記スラスト部材は、前記下垂部のアキシャル方向の長さが前記リング部のアキシャル方向の長さよりも長くなるよう形成されることを特徴とする請求項１から５のいずれかに記載のディスク駆動装置。6. The disk drive device according to claim 1, wherein the thrust member is formed such that a length of the hanging portion in an axial direction is longer than a length of the ring portion in an axial direction. . 前記スラスト部材の下垂部の内壁とリング部との結合部分には、凹状の領域部が形成されていることを特徴とする請求項１から６のいずれかに記載のディスク駆動装置。 Wherein the coupling portion between the inner wall and the ring portion of the hanging portion of the thrust member, the disk drive device according to claim 1, characterized in that the concave area portion is formed 6. 前記ハブは、前記シャフトの一端を前記スリーブ側に向けて固着し、
前記スリーブは、筒状端面の内側に前記シャフトを収納することを特徴とする請求項１から７のいずれかに記載のディスク駆動装置。 The hub is fixed with one end of the shaft facing the sleeve side,
Said sleeve, a disk drive device according to claim 1, characterized in that for accommodating the shaft inside the tubular end surface 7 of the. 前記ハウジング部材は、筒状の部分と、当該筒状の部分のハブとは反対側の端部を密閉する底部と、を一体に形成してなることを特徴とする請求項１から８のいずれかに記載のディスク駆動装置。The said housing member integrally forms the cylindrical part and the bottom part which seals the edge part on the opposite side to the hub of the said cylindrical part, The any one of Claim 1 to 8 characterized by the above-mentioned. The disk drive device according to claim 1. 前記ハブに記録ディスクが搭載された場合に、前記ハブ、前記シャフト、前記スラスト部材を含んだ回転体の重心が、前記ハブと前記シャフトの固着部分近傍に存在する場合、前記ベース部材から前記ハブへの方向における前記ステータコアの中心位置と、当該方向における回転体の重心位置との距離が１．８ｍｍ以下であることを特徴とする請求項１から９のいずれかに記載のディスク駆動装置。 When a recording disk is mounted on the hub, the center of gravity of the rotating body including the hub, the shaft, and the thrust member is in the vicinity of the fixing portion of the hub and the shaft. and the center position of the stator core in the direction of the disk drive device according to any one of claims 1 to 9, the distance between the position of the center of gravity of the rotating body in this direction is equal to or is 1.8mm or less.
JP2009020953A 2009-01-30 2009-01-30 Disk drive Expired - Fee Related JP4861441B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2009020953A JP4861441B2 (en) 2009-01-30 2009-01-30 Disk drive
US12/576,179 US8243383B2 (en) 2009-01-30 2009-10-08 Disk drive device provided with fluid dynamic bearing
US13/530,344 US8427778B2 (en) 2009-01-30 2012-06-22 Disk drive device provided with fluid dynamic bearing
US13/850,191 US8665556B2 (en) 2009-01-30 2013-03-25 Disk drive device provided with fluid dynamic bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009020953A JP4861441B2 (en) 2009-01-30 2009-01-30 Disk drive

Publications (3)

Publication Number Publication Date
JP2010176776A JP2010176776A (en) 2010-08-12
JP2010176776A5 true JP2010176776A5 (en) 2011-11-04
JP4861441B2 JP4861441B2 (en) 2012-01-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009020953A Expired - Fee Related JP4861441B2 (en) 2009-01-30 2009-01-30 Disk drive

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JP (1) JP4861441B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012193837A (en) 2010-08-09 2012-10-11 Nippon Densan Corp Spindle motor and disk drive
KR101339596B1 (en) * 2011-12-01 2013-12-10 삼성전기주식회사 Spindle motor
KR101350586B1 (en) * 2012-03-08 2014-01-14 삼성전기주식회사 Hydrodynamic bearing assembly and motor including the same

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4302413B2 (en) * 2003-03-10 2009-07-29 日本電産株式会社 Fluid dynamic bearing, spindle motor and recording disk drive device
JP2004316680A (en) * 2003-04-11 2004-11-11 Nippon Densan Corp Spindle motor and recording disk driving mechanism with the same
JP4571593B2 (en) * 2006-01-30 2010-10-27 アルファナテクノロジー株式会社 motor
JP2007292107A (en) * 2006-04-21 2007-11-08 Matsushita Electric Ind Co Ltd Fluid bearing type rotating device
JP5072491B2 (en) * 2006-09-07 2012-11-14 アルファナテクノロジー株式会社 Motor and motor manufacturing method

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