DK151739B - STORAGE FOR A STABLE ROTABLE DATA SHEETS, ISSUE IN A MAGNETIC PLATE STORE - Google Patents
STORAGE FOR A STABLE ROTABLE DATA SHEETS, ISSUE IN A MAGNETIC PLATE STORE Download PDFInfo
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- DK151739B DK151739B DK432678AA DK432678A DK151739B DK 151739 B DK151739 B DK 151739B DK 432678A A DK432678A A DK 432678AA DK 432678 A DK432678 A DK 432678A DK 151739 B DK151739 B DK 151739B
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- frame
- plate
- carrier
- plates
- plane
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
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- 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
- G11B17/22—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from random access magazine of disc records
- G11B17/30—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from random access magazine of disc records wherein the playing unit is moved according to the location of the selected record
Landscapes
- Moving Of Heads (AREA)
- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
Description
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Opfindelsen angår et bærestel for en stabel roterbare datalagerplader, især i et magnetpladelager, hvilket stel bærer datalagerpladernes pinolleje og lejet i mindst én drivmotor for i det mindste én i radial retning 5 indstillelig bærearm, som bærer læse/skrivehoveder, der er indstillelige på datalagerpladernes spor.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a carrier frame for a stackable rotatable data storage plate, in particular in a magnetic plate bearing, which supports the pin bearing of the data storage plates and the bearing in at least one drive motor for at least one radially adjustable support arm which carries read / write heads adjustable on the tracks of the data storage plates. .
Fra beskrivelsen til USA-patent nr. 3815150 er det kendt at udforme bærestellet til et magnetpladelager således, at det har T-formede profildele, i hvis midter-10 stykker er lejret drivspindelen for den drejelige magnetplade og drivmotoren til indstilling af magnethovedbære-armen, T-profilernesvinkelret på hinanden anbragte midterstykker danner en til den ene side åben ramme for magnetpladelageret, i hvis åbne side magnetplader efter valg 15 kan indsættes på og aftages fra drivspindelen. Overfor rammens åbne side ligger midterstykket af en T-profildel, på hvilken drivmotoren for magnethovedbærearmen er fastgjort. Anbringelse af en ekstra magnethovedbærearm diametralt overfor den allerede forhåndenværende bærearm er ikke mulig 20 ved denne kendte konstruktion.From the specification of US Patent No. 3815150, it is known to design the carrier frame for a magnetic plate bearing such that it has T-shaped profile parts, in the middle of which the bearing spindle of the rotatable magnetic plate and the drive motor for adjusting the magnetic head support arm are mounted. The central section of the T-profiles perpendicular to each other forms a frame open to one side for the magnetic plate bearing, in which open side magnetic plates of choice 15 can be inserted and removed from the drive spindle. Opposite the open side of the frame is the center piece of a T-profile part on which the drive motor for the magnetic head support arm is mounted. Attaching an additional magnetic head support arm diametrically to the already existing support arm is not possible in this known construction.
Det er formålet med opfindelsen at udforme bærestellet for en stabel roterbare datalagerplader især til et magnetpladelager således med en eller flere magnet-hovedbærearme, at det har stor bøjnings- og vridningstiv-25 hed overfor de under drift optrædende termiske og dynamiske kræfter.SUMMARY OF THE INVENTION It is an object of the invention to design the support frame for a stackable rotatable data storage plate, in particular, to a magnetic plate bearing such as one or more magnetic head support arms that it has high bending and torsional stiffness to the thermal and dynamic forces occurring during operation.
Dette er ifølge opfindelsen opnået ved, at bærestellet er udformet som en pladestablen og drivmotoren eller -motorerne omsluttende, symmetrisk ramme med to i 30 afstand overfor hinanden beliggende rammedele, der har et fælles længde-symmetriplan, som er parallelt med datalagerpladernes sporflader, og som med' tilnærmelse danner det plan, hvori resultanterne af drivkræfterne fra en eller flere drivmotorer for bærearmene· virker,_ og 35 i hvilket tyngdepunktet for det af pladestablen, bærearmene og deres drivmotorer dannede aggregat ligger.This is achieved by the invention in that the carrier frame is designed as a plate stack and the driving motor or motors enclosing symmetrical frame with two spaced apart frame members having a common length symmetry plane parallel to the track surfaces of the data storage plates, and which by approximation forms the plane in which the results of the driving forces of one or more drive motors for the support arms · operate, and at which the center of gravity of the aggregate formed by the plate stack, the support arms and their drive motors lies.
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Ved dette arrangement er der mulighed for at indstille magnethovedet i et magnetpladelager, der arbejder med plader med tætliggende spor, med stor nøjagtighed på et valgt spor, uanset om bærestellet på-5 virkes af betydelige dynamiske eller termiske kræfter.In this arrangement, it is possible to set the magnetic head in a magnetic plate bearing, which works with plates with adjacent grooves, with great accuracy on a selected track, regardless of whether the carrier frame is influenced by considerable dynamic or thermal forces.
Ved det i krav 3 angivne kan der opretholdes en i hovedsagen ens temperaturforskel mellem stellets indvendige og udvendige side, hvorved de termiske kræfter reduceres, og ved det i krav 4 anførte er det i 10 alt væsentligt muligt at eliminere eventuelle bøjningsmomenter på stellet under parallelforskydningen af de hevægelige dele. Det samme opnås ved udførelsesformen ifølge krav 5.In the case of claim 3, a substantially similar temperature difference between the inner and outer sides of the frame can be maintained, thereby reducing the thermal forces, and in the case of claim 4 it is essentially possible to eliminate any bending moments on the frame during the parallel displacement of the frame. the moving parts. The same is achieved in the embodiment of claim 5.
Opfindelsen skal i det følgende forklares nærmere 15 under henvisning til tegningen, på hvilken fig. 1, 2 og 3 viser skematisk et konventionelt pladelager for illustration af den hidtil kendte teknik, fig. 4 et skematisk tværsnit gennem et pladelager ifølge opfindelsen, og 20 fig. 5A og 5B i udtrukket, skrå afbildning det i fig. 4 viste pladelager.The invention will now be explained in greater detail with reference to the drawing, in which 1, 2 and 3 schematically show a conventional plate bearing for illustrating the prior art; 4 is a schematic cross-section through a plate bearing according to the invention; and FIG. 5A and 5B in the extended, oblique view, shown in FIG. 4.
I fig. 1, 2 og 3 er der vist et konventionelt datapladelager, som omfatter en stelplade 10, der er forbundet med en apparatramme 11 gennem støddæmpere, 25 der er idealiseret som fjedre 12. Til stelpladen 10's øvre flade er der fastgjort en svingspolemotor (VCM) 13. Svingspolemotoren 13 omfatter en svingspole 13a, der er forbundet med enhed 14 bestående af en vogn og en arm. Enheden 14 er indrettet til at bevæge sig transla-30 torisk for at bære magnethoveder 15 til overførende kontakt med et forud fastlagt, koncentrisk spor på en bestemt plade ud af antallet af koaksialt anbragte magnetiske plader 16. Pladestabelen er drejeligt monteret nær en spindel 17's ene ende. Spindlen er båret 35 nær sin modsat liggende ende i ikke viste lejer, der er båret af stelpladen 10.In FIG. 1, 2 and 3, a conventional data plate storage is shown which comprises a grounding plate 10 connected to an apparatus frame 11 through shock absorbers 25, idealized as springs 12. A pivot coil motor (VCM) 13 is attached to the upper surface of the grounding plate 10. The pivot coil motor 13 comprises a pivot coil 13a, which is connected to unit 14 consisting of a carriage and an arm. The unit 14 is arranged to move translatably to carry magnet heads 15 for transmitting contact with a predetermined concentric track on a particular plate out of the number of coaxially placed magnetic plates 16. The plate stack is pivotally mounted near one of the spindles 17 end. The spindle is supported 35 near its opposite end in bearings not shown, supported by the frame plate 10.
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Når enheden 14 føres frem mellem forskellige spor, dannes der reaktionskræfter Fl (fig. 2) ved og af svingspolemotoren 13. Da stelpladen 10's neutrale akse 10a er anbragt under kraftpåføringsområdet for kraften 5 Fl i en afstand Yl, påføres stelpladen et bøjningsmoment med størrelsen Fl x Yl. Andre bøjningsmomenter påføres stelpladen 10, når den accelereres i radial retning, fordi massemidtpunkterne for svingspolemotoren 13 og den af pladerne og spindlen bestående enhed 16, 17 er anbragt 10 over den neutrale akse 10a. En kraft F2, der virker i en afstand Y2 over den neutrale akse 10a, frembringer et moment F2 x Y2 på stelpladen 10. Hvis søgelængden og mellemrummet mellem afsøgningerne tilvejebringes således, at der er tale om en væsentlig kraftpåføring på svingspole-15 motoren 13 ved stempladen 10's egenfrekvens, vil der opstå en udbøjning, således som det er antydet i fig. 3.As the unit 14 is advanced between different tracks, reaction forces F1 (Fig. 2) are generated at and by the pivot coil motor 13. Since the neutral axis 10a of the ground plate 10 is placed below the force application area of the force 5 F1 at a distance Y1, the bending moment is applied to the size F1 x Yl. Other bending moments are applied to the frame plate 10 when accelerated in the radial direction, because the center of mass of the pivot coil motor 13 and the unit 16, 17 of the plates and spindle 10 are placed 10 above the neutral axis 10a. A force F2 acting at a distance Y2 above the neutral axis 10a produces a torque F2 x Y2 on the frame plate 10. If the search length and the space between the scans are provided such that there is a significant force application on the coil-coil motor 13 at If the piston plate 10 has its own frequency, a deflection will occur, as indicated in FIG. Third
Dette vil medføre, at enheden 14, der består af en vogn og en arm, vil dreje i forhold til pladerne 16, hvilket giver anledning til en sporregistreringsfejl mellem hove-20 derne 15 og pladerne. Som tidligere nævnt er det kendt teknik at forsøge at nedsætte denne fejl ved at gøre stelpladen 10 stivere ved at øge dens tykkelse. Denne fremgangsmåde er imidlertid ineffektiv, da den øger stelpladens vægt og pris.This will cause the unit 14, consisting of a carriage and an arm, to rotate relative to the plates 16, causing a tracking error between the heads 15 and the plates. As previously mentioned, it is well known in the art to try to reduce this error by making the frame 10 stiffer by increasing its thickness. However, this approach is ineffective as it increases the weight and cost of the frame plate.
25 Et andet problem, der er knyttet til pladelagre af den kendte art, består i den statiske udbøjning af stelpladen som følge af temperaturgradienter mellem stelpladen 10's øvre og nedre flader. En udbøjning af denne art giver anledning til termisk betingede sporregistre-30 ringsfejl som følge af den ujævne opvarmning samt en termisk forstyrrelse af stelpladen. De roterende plader 16 og svingspolen 13a er hovedvarmekilderne. Disse elementer øger temperaturen inde i pladestabelhylsteret 18 til et stykke over den omgivende luft under opvarmning af stel-35 pladen 10's øvre flade. Som følge af den større mængde turbulens inde i hylsteret er temperaturforskellen mellem 4Another problem associated with plate bearings of the prior art consists in the static deflection of the frame plate due to temperature gradients between the upper and lower faces of the frame plate 10. A deflection of this kind gives rise to thermally conditional trace recording errors due to the uneven heating as well as a thermal disturbance of the ground plate. The rotating plates 16 and the pivot coil 13a are the main heat sources. These elements increase the temperature inside the plate stack casing 18 to a distance above ambient air while heating the upper surface of the frame plate 10. Due to the greater amount of turbulence inside the casing, the temperature difference is between 4
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to vilkårlige punkter inde i hylsteret lille i forhold til temperaturforskellen mellem den omgivende luft og luften inde i hylsteret. Stelpladens bundflade er i regelen udsat for atmosfærens luft eller for opvarmning 5 fra energiforsyninger, der f.eks. kan være anbragt neden under stelpladen i en apparatramme 11. Den resulterende lodrette temperaturgradient over stelpladen 10 giver anledning til en udbøjning af stelpladen fra pladerne 16's plan, svarende til den i fig. 3 viste afvigelse, 10 hvorved der fremkommer en sporregistreringsfejl.two arbitrary points inside the casing small relative to the temperature difference between the ambient air and the air inside the casing. The base surface of the frame plate is usually exposed to the air of the atmosphere or to heating 5 from energy supplies which e.g. may be disposed below the ground plate in an apparatus frame 11. The resulting vertical temperature gradient above the ground plate 10 gives rise to a deflection of the ground plate from the plane of the plates 16, similar to that of FIG. 3, which results in a tracking error.
Det i det foregående beskrevne udbøjningspro-blem er i hovedsagen fjernet ved et pladelager ifølge opfindelsen, der skal beskrives nærmere i det følgende under henvisning til fig. 4 og 5.The deflection problem described above is substantially removed by a plate bearing according to the invention, to be described in more detail below with reference to FIG. 4 and 5.
15 Som skematisk vist i fig. 4 omfatter datapla- delageret ifølge opfindelsen en enhed 31 bestående af plader, en spindel og et hus, hvori der er anbragt et antal parallelle plader 32 koaksialt i en stabel 33.15 As schematically shown in FIG. 4, the data plate storage according to the invention comprises a unit 31 consisting of plates, a spindle and a housing in which a plurality of parallel plates 32 are coaxially arranged in a stack 33.
Disse plader har på deres overfor hinanden liggende plane 20 flader et magnetisk materiale, hvorpå digitale data kan optegnes ad magnetisk vej. Pladerne i stablen 33 er fastgjort til et nav 34, der er kilet på en spindel 35, som på passende måde er lejret i aksialt fordelt anbragte lejer 36 og trækkes fra en ikke vist drivkilde ved hjælp 25 af et remhjul 37, som er anbragt udenfor lejerne. Omkring pladestablen 33 er der anbragt et hus 38, som indeholder et antal langs omkredsen fordelt anbragte, radialt forløbende afstivningsribber 39.These plates have on their opposite planar surfaces a magnetic material on which digital data can be recorded magnetically. The plates of stack 33 are secured to a hub 34 wedged on a spindle 35 which is appropriately mounted in axially spaced bearings 36 and is pulled from a drive source not shown by means of a belt wheel 37 located outside bearings. Surrounding the plate stack 33 is a housing 38 containing a plurality of radially extending stiffening ribs spaced along the circumference.
Der er tilvejebragt to sæt magnethoveder hhv.Two sets of magnet heads are provided, respectively.
30 40a og 40b til læsning eller skrivning af magnetiske tegn på en tilsvarende gruppe af aksialt fordelt anbragte datalagerplader 32. Hvert sæt af hoveder kan bevæges trans-latorisk ved hjælp af en respektiv vogn/arm-enhed 41, der er indrettet til at føre et på forhånd udvalgt hoved 35 i overførende forbindelse med et forud fastlagt spor på en bestemt plade 32. Vogn/arm-enheden 41 er af i sig selv 530a and 40b for reading or writing magnetic characters on a corresponding set of axially distributed data storage plates 32. Each set of heads can be translationally moved by a respective carriage / arm assembly 41 arranged to carry a preselected head 35 in transmission with a predetermined track on a particular plate 32. The carriage / arm assembly 41 is of itself 5
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kendt art og skal ikke beskrives nærmere. Enhederne 41 er anbragt ved pladestablen 33's diametralt overfor hinanden liggende sider og båret af og translatorisk bevægelige i forhold til enheden 31 bestående af pla-5 derne, spindlen og huset. Til vognen/arm-enheden 41's bort fra hovederne vendende ende er der forbundet en elektrisk ledende spole 42 med en tilsvarende lineær aktiveringsenhed, fortrinsvis en svingspolemotor (VCM) 43.known species and should not be described in detail. The units 41 are positioned at the diametrically opposite sides of the plate stack 33 and supported by and translatably movable relative to the unit 31 consisting of the plates, the spindle and the housing. An electrically conductive coil 42 is connected to the carriage / arm assembly 41 away from the heads, with a corresponding linear actuator, preferably a swing coil motor (VCM) 43.
I fig. 5A omfatter hver svingspolemotor 43 en 10 stationær del 44, som indeholder et par elektromagneter 45a og b, der er fastgjort med en indbyrdes vinkelbue-afstand i forhold til detforreste polstykke 46 og et ikke vist centralt polstykke, der er formet ud i ét med en cirkulær bagplade 47. Disse polstykker er adskilt ra-15 dialt ved en ikke vist ringformet luftspalte. Den aksiale bevægelse af den tilsvarende spole 42, vogn/arm-enheden 41 og hovederne 40a eller 40b initieres på konventionel måde ved at lede en strøm gennem en udvalgt spole.In FIG. 5A, each pivot coil motor 43 comprises a stationary portion 44 which contains a pair of electromagnets 45a and b which are fixed at a mutual angular distance with respect to the front pole piece 46 and a central pole piece not shown formed integrally with a circular backplate 47. These pole pieces are separated radially by a not shown annular air gap. The axial movement of the corresponding coil 42, the carriage / arm assembly 41, and the heads 40a or 40b is initiated in a conventional manner by passing a current through a selected coil.
I fig. 5b er det vist, at pladelageret også 20 omfatter et i hovedsagen symmetrisk, ringformel bærestel 50. Stellet 50 er fortrinsvis et i ét stykke støbt støbeemne, der omfatter øvre og nedre rammedele, hhv. 51a og 51b, som indeholder overfor hinanden liggende ring- eller segment-formede ringområder, hvis ydre ender er af-25 sluttet i parallelle retliniede dele. Den øvre rammedel 51a's retliniede dele er parallelle med og anbragt i en afstand fra og ved deres ydre ender forbundet med den nedre rammedel 51b's tilsvarende dele. Hver rammedel 51a og 51b er forsynet med et par konsoller 52 og 53, hvoraf 30 kun det ene sæt er vist på tegningen.In FIG. 5b, it is shown that the plate bearing 20 also comprises a generally symmetrical annular support frame 50. Preferably, the frame 50 is a one-piece molded blank comprising upper and lower frame members, respectively. 51a and 51b, which contain opposite annular or segmental annular regions whose outer ends are terminated in parallel rectilinear portions. The rectilinear portions of the upper frame portion 51a are parallel to and spaced apart from and at their outer ends by the corresponding portions of the lower frame portion 51b. Each frame member 51a and 51b is provided with a pair of brackets 52 and 53, of which only one set is shown in the drawing.
I fig. 5A og 5B er der vist et væsentligt træk ved opfindelsen bestående i, at stellet 50 består af to i det væsentlige ens halvdele på hver sin side af et imaginært neutralt plan 54, der forløber lodret gennem 35 de overfor hinanden liggende øvre og nedre rammedele hhv.In FIG. 5A and 5B, an essential feature of the invention is shown in that the frame 50 consists of two substantially equal halves on each side of an imaginary neutral plane 54 extending vertically through the opposite upper and lower frame portions, respectively. .
51a og 51b. Den af pladerne, spindlen og huset bestående51a and 51b. The plate, the spindle and the housing
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enhed 31, den af vognen og armen bestående enhed 41 samt svingspolemotorerne 43's spoler 42 føres som en enhed i spindelens retning ind i et indre hulrum 56, der er dannet mellem den øvre og den nedre rammedel 51a og 51b.unit 31, the unit 41 of the carriage and the arm, as well as the coils 42 of the pivot coil motors 43, are inserted as a unit in the direction of the spindle into an inner cavity 56 formed between the upper and lower frame members 51a and 51b.
5 Den af pladerne, spindlen og huset bestående enhed 31 forbindes derpå, f.eks. ved hjælp af bolte, direkte til et par fremspring -57 i hhv. den øvre og den nedre rammedel 51a og 51b. De stationære dele 44 i hver svingspolemotor 43 føres herpå ind i hulrummet 56 i en retning i 10 hovedsagen parallel med spindlen 35's akse, indtil de er ud for de tilsvarende spoler 42. Herpå føres de indad mod spindelens akse i delvis overlappende koncentrisk stilling i forhold til den respektive spole og boltes fast til de pågældende konsoller 52 eller 53. De statio-15 nære dele 44 på de to svingspolemotorer boltes derpå direkte til konsollerne hhv. 52 og 53. Det af enhederne 31, 41, 42 og 44 bestående aggregat centreres inde i hulrummet 56 (dvs. anbringes med ens afstand fra husdelene 51a og 51b*s indre vægdele) , hvorpå de respektive 20 stationære dele 44 anbringes mellem husenes retliniede områder.The unit 31 of the plates, the spindle and the housing 31 is then connected, e.g. using bolts, directly to a pair of projections -57 in respectively. the upper and lower frame members 51a and 51b. The stationary portions 44 of each pivot coil motor 43 are then inserted into the cavity 56 in a direction substantially 10 parallel to the axis of the spindle 35 until they are adjacent to the corresponding spools 42. Thereafter, they are directed inwardly toward the axis of the spindle in a partially overlapping concentric position relative to the spindle 35. to the respective coil and bolted to the respective brackets 52 or 53. The stationary parts 44 of the two swivel coil motors are then bolted directly to the brackets respectively. 52 and 53. The assembly of the units 31, 41, 42 and 44 is centered within the cavity 56 (i.e., spaced evenly from the inner wall portions 51a and 51b *), whereupon the respective 20 stationary portions 44 are positioned between the rectilinear housings areas.
Fremspringene 57 er anbragt således aksialt i stellet 50, at massemidtpunktet for den af plader, spindlen og huset bestående enhed 31, inklusive den hertil knyt-25 tede konstruktion 41 og 42, er i hovedsagen sammenfaldende med det neutrale plan. På tilsvarende måde anbringes konsollerne 52 og 53 på en sådan måde, at kraftcentret i den stationære del 44 i hver svingspolemotor er anbragt så tæt som muligt og fortrinsvis sammenfaldende med det 30 neutrale plan 54.The projections 57 are arranged axially in the frame 50 so that the mass center of the plate 31, the spindle and the housing 31, including the associated structures 41 and 42, is substantially coincident with the neutral plane. Similarly, the brackets 52 and 53 are arranged in such a way that the power center of the stationary portion 44 of each pivot coil motor is disposed as close as possible and preferably coincides with the neutral plane 54.
Det indses, at dersom der kun anvendes én svingspolemotor, eller hvor der anvendes to svingspolemotorer til at styre de hoveder, som føres hen til en enkelt eller flere forskellige plader, er det forholds-35 vis enkelt at få svingspolemotorerne 43's kraftcentre til at ligge i detneutrale plan 54. Hvis der imidlertid somIt will be appreciated that if only one pivot coil motor is used, or where two pivot coil motors are used to control the heads which are directed to a single or multiple plates, it is relatively easy to cause the pivot coil motors 43 to be located in detneutral plan 54. If, however, as
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vist på tegningen anvendes to svingspolemotorer 43 til at regulere frem- og tilbageføringen af forskellige, med en indbyrdes aksial afstand anbragte sæt af hoveder 40a og 40b, kan svingspolemotorernes kraftcentre eventuelt 5 anbringes i mindre afstand fra det neutrale plan. I et sådant tilfælde, skal kraftcentrene imidlertid anbringes med samme ubetydelige afstand fra det neutrale plan.As shown in the drawing, two pivot coil motors 43 are used to control the return and return of different sets of heads 40a and 40b spaced apart, the pivot coil motors power centers 5 may optionally be located at a lesser distance from the neutral plane. In such a case, however, the power centers must be placed at the same negligible distance from the neutral plane.
Den samlede enhed bestående af plader, spindel og hus må have et massemidtpunkt, der er beliggende i det 10 neutrale plan i det ringformede stel 50 for at hindre inertikræfter, der hidrører fra stellets acceleration i samme plan, i at frembringe bøjningsmomenter og give anledning til en udbøjning af delene i forhold til hinanden, således som det er beskrevet i forbindelse med fig. 1 til 15 3. Idet de fra svingspolemotoren hidrørende reaktions kræfter enten angriber i eller tæt ved det neutrale plan 54, og idet inertikræfterne fra den af pladerne, spindlen og huset bestående enhed forløber i det neutrale plan, er en dynamisk udbøjning i det væsentlige undgået.The total assembly of plates, spindle and housing must have a center of mass located in the neutral plane of the annular frame 50 to prevent inertial forces resulting from the same plane acceleration from generating bending moments and giving rise to bending the parts relative to each other, as described in connection with FIG. 3. As the forces of reaction of the oscillation pole motor either attack at or near the neutral plane 54 and the inertial forces of the unit of the plates, the spindle and the housing extend in the neutral plane, a dynamic deflection is substantially avoided. .
20 En statisk bøjning ud af planet som følge af temperaturgradienter er ligeledes i det væsentlige undgået ved et pladelager ifølge opfindelsen. Det bemærkes, at spindelen 35's akse er vandret, medens de enkelte plader forløber i lodrette planer. Den største temperaturgradient 25 forløber således parallelt med pladernes plan og ikke uden for planet, således som det er tilfældet ved den i fig. 1 til 3 viste, kendte konstruktion. Idet den af pladerne, spindelen og huset bestående enhed 31 er centreret inde i hulrummet 56 i det i hovedsagen symmetriske stel 50, og 30 idet de oven over og neden under denne enhed anbragte rammedele 51a og 51b har i hovedsagen konstant vægtykkelse, fremkommer der en i hovedsagen konstant temperaturforskel mellem hulrummet og den omgivende luft udenfor stellet.A static bending out of the plane due to temperature gradients is also substantially avoided by a plate bearing according to the invention. It is noted that the axis of the spindle 35 is horizontal while the individual plates extend in vertical planes. Thus, the largest temperature gradient 25 extends parallel to the plane of the plates and not outside the plane, as is the case in the FIG. 1 to 3, known construction. As the unit 31 of the plates, spindle and housing is centered within the cavity 56 of the generally symmetrical frame 50, and 30 having the frame portions 51a and 51b located above and below this unit generally have a constant wall thickness, a basically a constant temperature difference between the cavity and the ambient air outside the frame.
Stellet 50's aksiale ender er aflukket ved dæksler af ΛΒ plast eller let plademetal. Disse dæksler har en så ubetydelig stivhed i forhold til stellet, at temperaturgra-The axial ends of the frame 50 are closed by covers of ΛΒ plastic or light sheet metal. These covers have such insignificant stiffness in relation to the frame that the temperature gradient
OISLAND
88
DK 151739BDK 151739B
dienterne over disse ikke bringer det ringformede stel til at bøje ud fra den plane ligevægtstilling.the dents above these do not cause the annular frame to bend out from the plane equilibrium position.
Med et pladelager ifølge opfindelsen er den dynamiske udbøjning af stellet fra det ved pladerne 5 dannede plan som følge af svingspolemotorens reaktionskræfter samt den statiske udbøjning af stellet som følge af temperaturgradienter i det væsentlige fjernet. Herved er en væsentlig kilde til sporregistreringsfejl fjernet, og det er muligt at arbejde med mindre spor- til -sporaf-1° stand i de pågældende plader. Hertil kommer, at udskiftningen af den af pladerne, spindelen og huset bestående enhed 31 er enklere at foretage, da enheden 31 og de hertil knyttede, bevægelige enheder 32, 41 og 40 kan fjernes aksialt som en enhed, når de forholdsvis tunge, stationæ-15 re dele 44 i svingspolemotorerne 43 er fjernet ved udtrækning i diametralt modsatte retninger.With a plate bearing according to the invention, the dynamic deflection of the frame from the plane formed by the plates 5 due to the reaction forces of the pivot coil motor as well as the static deflection of the frame due to temperature gradients is substantially removed. This removes a significant source of track detection error, and it is possible to work with smaller track-to-track off-1 ° condition in the respective plates. In addition, the replacement of the plate 31, the spindle and the housing 31 is easier to perform since the unit 31 and the associated moving units 32, 41 and 40 can be removed axially as a unit when the relatively heavy, stationary 15 parts 44 of the pivot coil motors 43 are removed by pulling in diametrically opposite directions.
20 25 30 3520 25 30 35
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US83834677A | 1977-09-30 | 1977-09-30 | |
| US83834677 | 1977-09-30 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK432678A DK432678A (en) | 1979-03-31 |
| DK151739B true DK151739B (en) | 1987-12-28 |
| DK151739C DK151739C (en) | 1988-06-13 |
Family
ID=25276871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK432678A DK151739C (en) | 1977-09-30 | 1978-09-29 | STORAGE FOR A STABLE ROTABLE DATA SHEETS, ISSUE IN A MAGNETIC PLATE STORE |
Country Status (17)
| Country | Link |
|---|---|
| JP (1) | JPS5455408A (en) |
| AR (1) | AR221066A1 (en) |
| BR (1) | BR7805656A (en) |
| CA (1) | CA1109557A (en) |
| CH (1) | CH629617A5 (en) |
| DE (1) | DE2830828A1 (en) |
| DK (1) | DK151739C (en) |
| FI (1) | FI67141C (en) |
| FR (1) | FR2404886A1 (en) |
| GB (1) | GB2005454B (en) |
| IE (1) | IE47039B1 (en) |
| IT (1) | IT1174388B (en) |
| NL (1) | NL7809812A (en) |
| NO (1) | NO150255C (en) |
| SE (1) | SE426112B (en) |
| SU (1) | SU921475A3 (en) |
| ZA (1) | ZA784308B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57191871A (en) * | 1981-05-22 | 1982-11-25 | Hitachi Ltd | Magnetic disk storing device |
| EP0222939B1 (en) * | 1985-10-31 | 1991-01-23 | International Business Machines Corporation | Disk file with in-hub motor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3815150A (en) * | 1972-06-23 | 1974-06-04 | Memorex Corp | Flexible disc drive |
-
1978
- 1978-05-25 CA CA304,089A patent/CA1109557A/en not_active Expired
- 1978-07-12 FR FR7821340A patent/FR2404886A1/en active Granted
- 1978-07-13 DE DE19782830828 patent/DE2830828A1/en active Granted
- 1978-07-26 GB GB7831245A patent/GB2005454B/en not_active Expired
- 1978-07-28 IE IE1537/78A patent/IE47039B1/en not_active IP Right Cessation
- 1978-07-28 ZA ZA784308A patent/ZA784308B/en unknown
- 1978-08-10 CH CH851678A patent/CH629617A5/en not_active IP Right Cessation
- 1978-08-31 BR BR7805656A patent/BR7805656A/en unknown
- 1978-09-01 SE SE7809227A patent/SE426112B/en not_active IP Right Cessation
- 1978-09-07 IT IT27411/78A patent/IT1174388B/en active
- 1978-09-08 JP JP10987878A patent/JPS5455408A/en active Granted
- 1978-09-27 FI FI782943A patent/FI67141C/en not_active IP Right Cessation
- 1978-09-28 SU SU782670598A patent/SU921475A3/en active
- 1978-09-28 NL NL7809812A patent/NL7809812A/en not_active Application Discontinuation
- 1978-09-28 NO NO783288A patent/NO150255C/en unknown
- 1978-09-29 AR AR273894A patent/AR221066A1/en active
- 1978-09-29 DK DK432678A patent/DK151739C/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3815150A (en) * | 1972-06-23 | 1974-06-04 | Memorex Corp | Flexible disc drive |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA784308B (en) | 1980-02-27 |
| DK151739C (en) | 1988-06-13 |
| CA1109557A (en) | 1981-09-22 |
| FI782943A (en) | 1979-03-31 |
| NO783288L (en) | 1979-04-02 |
| DE2830828B2 (en) | 1980-05-08 |
| IE781537L (en) | 1979-03-30 |
| FI67141B (en) | 1984-09-28 |
| FR2404886A1 (en) | 1979-04-27 |
| DE2830828A1 (en) | 1979-04-05 |
| JPS5756151B2 (en) | 1982-11-27 |
| FR2404886B1 (en) | 1984-11-16 |
| SE7809227L (en) | 1979-03-31 |
| CH629617A5 (en) | 1982-04-30 |
| IE47039B1 (en) | 1983-11-30 |
| BR7805656A (en) | 1979-04-17 |
| SE426112B (en) | 1982-12-06 |
| FI67141C (en) | 1985-01-10 |
| JPS5455408A (en) | 1979-05-02 |
| GB2005454A (en) | 1979-04-19 |
| NO150255B (en) | 1984-06-04 |
| AR221066A1 (en) | 1980-12-30 |
| GB2005454B (en) | 1982-02-10 |
| DE2830828C3 (en) | 1981-01-15 |
| IT7827411A0 (en) | 1978-09-07 |
| DK432678A (en) | 1979-03-31 |
| NL7809812A (en) | 1979-04-03 |
| SU921475A3 (en) | 1982-04-15 |
| IT1174388B (en) | 1987-07-01 |
| NO150255C (en) | 1984-09-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |