EP0170686A1 - Dispositif de stockage pour une pile de disques d'une memoire a disque magnetique - Google Patents

Dispositif de stockage pour une pile de disques d'une memoire a disque magnetique

Info

Publication number
EP0170686A1
EP0170686A1 EP85900973A EP85900973A EP0170686A1 EP 0170686 A1 EP0170686 A1 EP 0170686A1 EP 85900973 A EP85900973 A EP 85900973A EP 85900973 A EP85900973 A EP 85900973A EP 0170686 A1 EP0170686 A1 EP 0170686A1
Authority
EP
European Patent Office
Prior art keywords
spindle
disk
bearing
housing
stack
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.)
Withdrawn
Application number
EP85900973A
Other languages
German (de)
English (en)
Inventor
Albert Dierkes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0170686A1 publication Critical patent/EP0170686A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/038—Centering or locking of a plurality of discs in a single cartridge
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/03—Containers for flat record carriers
    • G11B23/032—Containers for flat record carriers for rigid discs
    • G11B23/0323—Containers for flat record carriers for rigid discs for disc-packs

Definitions

  • the invention relates to a bearing arrangement for a disk stack of a magnetic disk memory according to the preamble of the main claim.
  • FIG. 1 An example of such a plate stack construction with a built-in drive motor is described in the essay "Motor in spindle gives icro-Winchester room for 140 M bytes", printed in Mini-Micro-Systems, February 1983, pages 143 to 148.
  • a conventional structure for a plate stack with a rotating spindle and a drive motor arranged thereon outside the plate stack housing is contrasted with an improved structure with an internal motor which is arranged on a fixed spindle.
  • the reversal in the function of the spindle results from the integration of the drive motor in the hub body of the spindle and the fixing of the motor stator on the now fixed spindle.
  • the 14 inch disk memories generally known, in some cases very dig constructions to store the spindle of the plate stack on one side. This applies in particular to removable disk storage, in which the stack of disks must be removable from the magnetic storage device.
  • structures are also known in which the spindle is rigid in a frame surrounding the stack
  • Housing is supported on both sides.
  • a fixed bearing and a floating bearing are used in this double-sided bearing.
  • a spring is provided adjacent to the floating bearing, which clamps the two bearings together after assembly so that a coaxial spindle guide which is as free of play as possible is achieved.
  • the present invention is therefore based on the object of creating a space-saving storage of the disk stack in the housing for a magnetic disk storage device which permits the installation of a drive motor in the hub of the disk stack and is nevertheless structurally simple.
  • the plate stack, including its storage, should be able to be assembled as a module and also be accessible as a finished unit inserted into the housing in order to be able to carry out tests and final assembly operations, such as balancing, etc., in the installed state.
  • This object is achieved according to the present invention solved the above-mentioned disk stack arrangement for a magnetic disk storage with the features described in the characterizing part of patent claim 1.
  • This solution is characterized in particular by the fact that the hub of the plate stack, designed as a hollow body for the installation of a drive motor, is rigidly fixed on a rotating spindle. This enables this spindle to be led out of the housing of the disk storage at least on one side and thus to connect further functions which are important for the operation of an efficient disk storage, as characterized in further developments of the invention.
  • Such functions relate to the cooling of electronic assemblies, which are arranged on the outer wall of the housing, a correct grounding of the plate stack or a rapid braking in the outlet.
  • FIG. 1 and FIG. 2 the structure of a magnetic disk memory designed according to the invention, each in a bottom view and a top view, the basic structure of the magnetic disk memory being shown in particular in the partial section of FIG. 1, and
  • FIG 3 shows a section through the housing along the section line III ... III with the illustration of an embodiment of the mounting of the plate stack.
  • FIGS. 1 and 2 The views of the housing of a magnetic disk storage shown in FIGS. 1 and 2 illustrate that the housing is divided along a diagonally running parting plane A into a carrier shell 1 and a cover 2, which together form an essentially rectangular box.
  • the cover 2 is partially cut open in FIG. 1 in order to show the essential structural units inside the magnetic disk memory.
  • a stack of plates 8 is thus visible, which - as indicated schematically - is arranged on a hub 9 and rotates in the direction of the arrow.
  • a rotary positioner 10 which is shown in the operating position, is arranged to the side of the stack of plates.
  • the position and inclination of the parting plane A enables all structurally important housing functions to be combined in the support shell 1 and the installation depth for the rotary positioner 10 to be optimized with regard to manufacture and assembly. This is particularly important for the production, since bores or mating surfaces assigned to one another in the support shell 1, in particular also for the formation of the bearing points, can be produced in one setting, and chained tolerances are thus avoided .
  • FIG. 1 shows certain details of the first bearing position of the plate stack 8, which are explained in more detail in connection with the description of FIG. 3.
  • a slot 12 is provided as the bearing receiving surface in the carrier shell base 11, which slot is open towards the edge of the carrier shell and has a 180 * curve at the bottom.
  • FIG. 2 shows the housing of the magnetic disk storage from the top and thus details of the support shell cover 13 with the second bearing point for the disk stack 8.
  • a kidney-shaped cover rich 15 aligned symmetrically to the slot 12 in the opposite tray bottom 11.
  • This area 15 is a depression in the carrier shell ceiling 13, as can be seen from the section shown in FIG. 3.
  • the wall thickness is locally limited by this recess, to such an extent that it no longer negligibly springs in this area, while the carrying shell 1 is otherwise designed as a warp-resistant structure.
  • the area 15 is therefore referred to below as a resilient wall area.
  • the hub 9 is designed as a hollow body. A plurality of magnetic disks 16 are pushed onto their outer surface and held at the same distance via intermediate rings 17.
  • the hub has at one end a radially projecting collar 18 as a contact surface for the outermost magnetic disk.
  • a clamping ring 19 is provided, which has an inwardly projecting projection 20 on the inner diameter and is seated in a centering turn 21 of the hub 9.
  • the clamping ring 19 centered in this way is clamped against the end face of the hub with fastening screws 22 and thus fixes the magnetic disks 16 on the hub body in a force-locking manner.
  • the clamping ring 19 also serves as a first balancing disk.
  • a plurality of threaded bores 23 are arranged concentrically on its outer edge surface, into which small balancing weights are screwed in as required.
  • the hub 9 has a central web 24 which is fixed on a u-running spindle 25 with a tight fit.
  • Spindle 25 of the plate stack 8 has one at each end Spindle pins on which the inner rings of ball bearings 26 and 27 are fixed in place.
  • the outer rings of these ball bearings in turn carry a first or second bearing bush 28 or 29 with a tight fit. Both bearing bushes stand still when the plate stack is installed.
  • the first bearing bush 28 is inserted into the slot 12 inserted in the carrier shell bottom 11 and has a flange 30 to which an indentation 31 recessed from the outside into the carrier shell bottom 11 is associated with a bottom hole as a mating surface. This flange is fixed to the support shell base 11 from the outside with further fastening screws 32.
  • a sealing element 33 is provided, which laterally encompasses the flange 30 of the first bearing bush 28 into the recess 31 and is pressed into the recess 31 with the aid of a pressure piece 34.
  • This sealing element 33 - as better shown in FIG. 1 - is an extension piece of the circumferential sealing ring 7.
  • the second bearing bush 29 is inserted into the cavity of the hub 9 with sufficient play. With its outward-facing end face, it is inserted into a centering turn 35 aligned coaxially with the plate stack axis and recessed in the inner face of the carrier shell ceiling 13 and fixed there with tensioning screws 36, the arrangement of which is clear in combination with FIG. 2. These clamping screws are inserted in through holes on the edge of a circular segment 37, this circular segment forming the center of the resilient region 15.
  • the plate stack 8 is used as a fully assembled unit in the support shell 1.
  • the ball bearings 26, 27 are axially unloaded, the axial distance between the two mating surfaces 31 and 35 of the plate stack bearings is therefore greater than the distance between the corresponding contact surfaces of the first and second bearing bushes 28 and 29
  • the plate stack 8 can thus be pushed into the carrier shell 1.
  • the tensioning screws 36 are tightened, the resilient region 15 deforms slightly in the manner of a membrane, which is tensioned in the process.
  • This tensioning of the membrane in turn means that the two ball bearings 26 and 27 are axially braced, as is exaggerated in FIG. 3.
  • the second bearing bush 29 Due to the tensioning of the resilient area 15, the second bearing bush 29 is pulled outward in the axial direction, so that the outer ring of the second ball bearing 27 'is displaced axially relative to its inner ring.
  • This bearing is thus clamped in the axial direction and, as a result, the spindle 25, together with the entire hub 9 and its attachments, is likewise pulled axially in the direction of the supporting shell cover 13. With this spindle displacement, the corresponding axial bracing of the first ball bearing 26 then occurs, the outer ring of which is fixed in the rigidly arranged first bearing bush 28.
  • a drive motor for the plate stack is arranged in the cavity of the hub 9 between the central web 24 and the first bearing bush 28, designed as an internal motor 38.
  • Its fixed stator 39 is pushed over the spindle 25 at a sufficient distance and fitted with an annular fastening foot 40 with a tight fit in the inner end of the first bearing bush 28.
  • This stator carries a stator winding 41.
  • the power supply to this winding takes place via cables, not shown, through an opening which results from the different diameters of the inner hub surface and the outer surface of the first bearing bushing 28.
  • the windingless rotor of the inner motor 38 consists of permanent magnets 42 in connection with the hub body, which at the same time forms a magnetic return yoke.
  • the receiving surface of the first bearing bush 28 is sealed in the slot 12 by the sealing element 33.
  • the end face of the second bearing bush 29 has an annular recess with an inserted sealing ring 43, which seals the cavity of the second bearing bush 29 with the second ball bearing 27 from the interior of the housing.
  • the ball bearings 26, 27 are adjacent, and a commercially available magnetic liquid seal 44 and 45 is provided on the inner ends of the bearing bushes 28, 29, respectively.
  • a vent hole 46 arranged centrally in the resilient area 15 is provided.
  • the clamping ring 19 forms at the same time 'a second bearing point directly associated Aus ⁇ balancing disk.
  • Another balancing disk 47 is arranged adjacent to the first ball bearing 26.
  • This balancing disk has a centering shoulder which is placed on the pin of the spindle 25 and is fixed coaxially to the spindle by means of a central screw 48.
  • the disk circumference has threaded holes 49 for receiving counterweights evenly distributed.
  • a further function can be implemented with the balancing disk 47.
  • a magnetic head "flies" at a very short distance over the surface of a magnetic disk 16 assigned to it due to an air cushion which is formed as a result of the high relative speed between the magnetic head and the disk surface. As soon as this relative speed decreases, this air cushion will collapse and the magnetic head will land on the surface of the disk. The risk of injury to the plate surface is extremely high. It must therefore be ensured that the range of low relative speeds is passed through very quickly. For this reason, a mechanical brake is provided which very quickly brings the plate stack to a standstill when it runs out.
  • the balancing disk 47 therefore has a wide flange, which can serve as a disk of an otherwise conventional disk brake, which is therefore not shown in detail.
  • an outwardly projecting fan wheel 50 can also be placed on the balancing disk 47 and is used for cooling assemblies (not shown here) which are arranged at the level of this fan wheel on the outer wall of the housing.
  • the circumferential spindle of the hub of the magnetic disk stack is supported on both sides in the one-piece support shell and part of the wall of the support shell is designed as a resilient area in order to clamp the tolerant ball bearings in the axial direction without play.

Landscapes

  • Rotational Drive Of Disk (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Packaging For Recording Disks (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Abstract

Mémoire à disque magnétique avec une pile de disques (8) placée dans une paroi latérale (11) d'un boîtier (1, 2), entraînée par un moteur interne (38) et dotée d'un arbre tournant (25). Un moyen (9) en forme de corps creux est fixé de manière rigide par un pont médium (24) sur l'arbre. Un tenon de l'arbre est disposé de manière pivotante sur un emplacement de stockage (26, 28, 30) dans la paroi latérale (11). Un coussinet (28) est introduit et fixé dans une fente (12) pratiquée dans la paroi latérale (11). Un disque d'équilibrage (47) est placé sur l'extrémité de l'arbre saillant vers l'extérieur à travers l'emplacement de stockage. Le disque d'équilibrage peut comporter une bride en forme de disque de freinage et porter sur sa surface extérieure une poulie de ventilateur. L'extremité de l'arbre peut être utilisée avec une plaquette de carbone mise à la terre en tant que contact de mise à la terre.
EP85900973A 1984-02-07 1985-02-07 Dispositif de stockage pour une pile de disques d'une memoire a disque magnetique Withdrawn EP0170686A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3404208 1984-02-07
DE19843404208 DE3404208A1 (de) 1984-02-07 1984-02-07 Magnetplattenspeicher mit in einem federnd ausgebildeten gehaeuse beidseitig gelagerten plattenstapel

Publications (1)

Publication Number Publication Date
EP0170686A1 true EP0170686A1 (fr) 1986-02-12

Family

ID=6226973

Family Applications (2)

Application Number Title Priority Date Filing Date
EP84114902A Expired EP0151260B1 (fr) 1984-02-07 1984-12-07 Mémoire à disques magnétiques comprenant une pile de disques sur paliers latéraux à l'intérieur d'un boîtier étant élastique en partie
EP85900973A Withdrawn EP0170686A1 (fr) 1984-02-07 1985-02-07 Dispositif de stockage pour une pile de disques d'une memoire a disque magnetique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP84114902A Expired EP0151260B1 (fr) 1984-02-07 1984-12-07 Mémoire à disques magnétiques comprenant une pile de disques sur paliers latéraux à l'intérieur d'un boîtier étant élastique en partie

Country Status (6)

Country Link
US (2) US4703374A (fr)
EP (2) EP0151260B1 (fr)
JP (1) JPS60182053A (fr)
AT (1) ATE42426T1 (fr)
DE (2) DE3404208A1 (fr)
WO (1) WO1985003593A1 (fr)

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Publication number Priority date Publication date Assignee Title
USRE38662E1 (en) 1980-05-10 2004-11-30 Papst Licensing Gmbh & Co. Kg Disk storage device having a sealed bearing tube
USRE37058E1 (en) 1980-05-10 2001-02-20 Papst Licensing Gmbh & Co. Kg Disk storage device having contamination seals
USRE38673E1 (en) 1980-05-10 2004-12-21 Papst Licensing Gmbh & Co. Kg Disk storage device having a hub sealing member feature
USRE38601E1 (en) 1980-05-10 2004-09-28 Papst Licensing, GmbH & Co. KG Disk storage device having a radial magnetic yoke feature
EP0222939B1 (fr) * 1985-10-31 1991-01-23 International Business Machines Corporation Mémoire à disques avec moteur intégré dans le moyeu de la pile de disques
JPS62162278A (ja) * 1986-01-10 1987-07-18 Fujitsu Ltd スピンドルモ−タ保持構造
GB2187031B (en) * 1986-01-21 1990-10-17 Raymond Engineering Magnetic disc memory unit
JPS62186840U (fr) * 1986-05-19 1987-11-27
USRE34270E (en) * 1987-01-14 1993-06-01 Fujitsu Limited Divided housing for supporting magnetic disks
JPS63175282A (ja) * 1987-01-14 1988-07-19 Fujitsu Ltd 磁気デイスク装置の分割構造
US4814652A (en) * 1987-02-27 1989-03-21 Maxtor Corporation Disk drive motor with thermally matched parts
US4910620A (en) * 1987-05-14 1990-03-20 Siemens Aktiengesellschaft Thermal compensation structure for a disk pack module
AU1948688A (en) * 1987-05-29 1988-12-21 Conner Peripherals, Inc Disk drive architecture
US4835637A (en) * 1987-09-08 1989-05-30 International Business Machines Corporation Disk file with in-hub motor
US4905110A (en) * 1988-03-25 1990-02-27 Magnetic Peripherals Inc. Disk drive spindle motor
US5552650A (en) * 1988-06-09 1996-09-03 Papst Licensing Gmbh Disk storage device with motor with axially deep flange
JP2785279B2 (ja) * 1988-09-26 1998-08-13 ソニー株式会社 ディスクカートリッジ
JPH02166681A (ja) * 1988-12-20 1990-06-27 Tokico Ltd 磁気ディスク装置
US5212607A (en) * 1990-07-31 1993-05-18 Seagate Technology, Inc. Disk drive including unitary deck for aligning and supporting axially retractable spindle assembly
US5295029A (en) * 1990-07-31 1994-03-15 Seagate Technology, Inc. Disk drive including unitary deck for aligning and supporting axially retractable spindle assembly
US5875067A (en) 1991-03-22 1999-02-23 Seagate Technology, Inc. Acoustic isolator for a disc drive assembly
US5729404A (en) * 1993-09-30 1998-03-17 Seagate Technology, Inc. Disc drive spindle motor with rotor isolation and controlled resistance electrical pathway from disc to ground
US5485331A (en) * 1993-09-30 1996-01-16 Seagate Technology, Inc. High resistivity bearing balls for spindle motor isolation
US5422776A (en) * 1993-12-27 1995-06-06 Maxtor Corporation Improvement in a magnetic disk drive for balancing a disk pack assembly
DE4408782A1 (de) * 1994-03-15 1995-09-21 Fraunhofer Ges Forschung Folien-Schallabsorber
US5710678A (en) * 1994-07-22 1998-01-20 Seagate Technology, Inc. Disc drive with self-pressurizing fluid bearing and shaft-supporting-ball retaining element
US6510021B1 (en) * 1996-06-03 2003-01-21 Seagate Technology Llc Mechanical isolation for a disc drive spindle motor
US6396179B2 (en) * 2000-05-24 2002-05-28 Seagate Technology Llc Retractable grounding device for a spindle motor
US6954328B2 (en) 2001-02-09 2005-10-11 Seagate Technology, Llc Multi-layer housing structure with tuned layers using hypothetical modeling
US7155807B2 (en) * 2003-08-28 2007-01-02 Hitachi Global Storage Technologies Netherlands Bv Method of centering media disks on the hub of a spindle motor in a hard disk drive
US7283325B2 (en) * 2003-08-28 2007-10-16 Hitachi Global Storage Technologies Netherlands Bv Apparatus and system for centering media disks on the hub of a spindle motor in a hard disk drive
CN111700565B (zh) * 2020-06-30 2021-10-15 厦门理工学院 一种喷淋式洗碗装置

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Also Published As

Publication number Publication date
EP0151260B1 (fr) 1989-04-19
WO1985003593A1 (fr) 1985-08-15
US4780777A (en) 1988-10-25
DE3477860D1 (en) 1989-05-24
EP0151260A1 (fr) 1985-08-14
US4703374A (en) 1987-10-27
DE3404208A1 (de) 1985-08-08
JPS60182053A (ja) 1985-09-17
ATE42426T1 (de) 1989-05-15

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19851024

AK Designated contracting states

Designated state(s): AT CH DE FR GB LI NL

17Q First examination report despatched

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Effective date: 19880108

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Inventor name: DIERKES, ALBERT