SE189552C1

SE189552C1 -

Info

Publication number: SE189552C1
Authority: SE
Publication date: 1964-01-01

Description

Uppfinnare: R R Ohlon och A. H Jonason Foreliggande uppfinning avser en lagringsoch drivningsanordning, foretradesvis for kardanskt upphangda roterbara organ, innefattande en i ett faste lagrad mellankropp, vilken uppbar det roterbara organet och kontinuerlig rorelse for att nedbringa startfriktionsmomentet for organet. The present invention relates to a storage and drive device, preferably for gimbal-mounted rotatable members, comprising a fixedly mounted intermediate body which carried the rotatable member and continuous movement to reduce the starting friction torque of the member.

En kand lagrings- och drivningsanordning av detta slag bestar av en lagerhylsa, relativt vilken en axeltapp pa det roterbara organet ar fritt lopande, en i lagerhylsan monterad elektrisk motor, som orabesOrjer den kontinuerliga rorelsen, samt en med axeltappen sammankopplad motor f6r drivning av det roterbara organet. A known bearing and drive device of this kind consists of a bearing sleeve, relative to which a shaft pin on the rotatable member is freely running, an electric motor mounted in the bearing sleeve, which controls the continuous movement, and a motor connected to the shaft pin for driving the rotatable the body.

Den kanda anordningen har dock visat sig Tara olamplig sarskilt for kardanringar och liknande delar i gyroapparater. Dels kraver den ett avsevart storre utrymme och far ocksa stone vikt an konventionella lagrings- och drivningsanordningar dels kompliceras apparaterna av de manga elektriska fOrbindningarna, som erfordras far de bada motorernas drift. However, the known device has proved to be unsuitable especially for gimbal rings and similar parts in gyro devices. On the one hand, it requires a considerably larger space and also weighs more heavily than conventional storage and drive devices, and on the other hand, the devices are complicated by the many electrical connections required for the operation of both motors.

Enligt uppfinningen har problemet att fa en lagrings- och drivningsanordning, som uppfyller hogt stallda krav pa det roterbara organets lattrOrlighet men som icke har dylika olagenheter, losts pa sa satt, att mellankroppen Or dels forbunden med en kraftkalla, anordnad att bringa mellankroppen att antingen oscillera relativt fastet eller att oscilIera och samtidigt rotera relativt fastet, dels forenad med det roterbara organet medelst en elastisk koppling, anordnad att av mellankroppens rorelser overfOra enbart eller i huvudsak enbart rotationen till det roterbara organet. According to the invention, the problem of having a storage and driving device which satisfies high demands on the latrability of the rotatable member but which does not have such irregularities has been solved in such a way that the intermediate body Or partly connected to a power source, arranged to cause the intermediate body to either oscillate relatively fixed or to oscillate and at the same time rotate relative to the fixed, partly united with the rotatable member by means of an elastic coupling, arranged to transmit only or substantially only the rotation to the rotatable member of the movements of the intermediate body.

Uppfinningen forklaras narmare nedan i samband med beskrivning av pa bifogad ritning visade utforingsformer av anordningen. Fig. 1 visar delvis i sektion en lagrings- och drivningsanordning enligt uppfinningen jamte ett dari upplifingt roterbart organ. Fig. 2 och 3 visa lagrings- och drivningsanordningen I ett modifierat utfOrande, varvid fig. 3 Or en sektion utefter linjeni fig. 2. Fig. 4 ocb visa ytterligare en utforingsform av anordningen enligt uppfinningen, varvid fig. ,5 ix en sektion -defter linjen V—V i fig. 4. The invention is explained in more detail below in connection with a description of embodiments of the device shown in the accompanying drawing. Fig. 1 shows, partly in section, a storage and drive device according to the invention and a rotatable member embedded therein. Figs. 2 and 3 show the storage and drive device In a modified embodiment, Fig. 3 being a section along the line in Fig. 2. Figs. 4 and 3 show a further embodiment of the device according to the invention, wherein Figs. then the line V — V in Fig. 4.

Lagrings- och drivningsanordningen enligt fig. 1 Or orienterad i tvenne inbOrdes of Orskjutbara fasten 1 ingaende i en gyroapparat. I fastena Oro upptagna med varandra koncentriska styrningar 2 var och en innehallande dels en mellankropp 3, 4, vilken Or noggrant lagrad i styrningen awm schematiskt antydes av kulor 5, dels en kraftkalla 6, 7, t. ex. en elektrisk momentmotor, vars rotor Or forbunden med mellankroppen. I mellankroppen finnes en central urborrning 8, van i en axeltapp 9 pa ett roterbart organ 10, har visat som en kardanring, Or lagrad medelst kulor 11. Mellankroppen innehaller ocksa en elastisk koppling bestaende av en torsionsstav 12, vars andar Oro infasta vid axeltappen och vid urborrningens botten. The storage and drive device according to Fig. 1, oriented in two directions, is incorporated into slidable fasteners 1 in one gyro apparatus. In the fasteners Oro occupied by concentric guides 2 each containing partly an intermediate body 3, 4, which Or carefully stored in the guide awm is schematically indicated by balls 5, partly a force source 6, 7, e.g. an electric torque motor, the rotor of which is connected to the intermediate body. In the middle body there is a central bore 8, used in a shaft pin 9 on a rotatable member 10, has shown as a gimbal ring, Or stored by means of balls 11. The middle body also contains an elastic coupling consisting of a torsion bar 12, the spirits of which are attached to the shaft pin and at the bottom of the borehole.

Kraftkallorna Oro elektriskt fOrbundna med en icke visad stromforsorjningsanordning, vilken sa lange lagrings- och drivningsanordningen Or i drift avgiver en spanning, som pa kant satt Or formad som en snabbt modulerad vaxelspanning eller en snabbt oscillerande spanning beroende pa om kraftkallorna 6 ()eh 7 utgoras av vaxelstriims- eller likstrOmsmotorer. Stromforsorj ningsanord- 2— — ningen avgiver dessutom en pa denna spanning overlagrad signal, som utgar under den tid dã vridm.oment skall overforas till det roterbara organet 10. Som en foljd harav kommer kraftkallorna att bringa mellankropparna 3 och 4 att antingen oscillera relativt fastena 1 utan att i ovrigt andra lage relativt dessa eller att oscillera och samtidigt rotera relativt fa.stena. - Den oscillerande rOrelsen, som ju har till uppgift att nedbringa startfriktionsmomentet for det roterbara organet till en niva jamforbar med den, som galler di samma organ kringvrides, onskar man emellertid icke fâ overford fran mellankropparna. The power sources are electrically connected to a power supply device (not shown), which as long as the storage and driving device Or in operation emits a voltage which is on the edge Or formed as a rapidly modulated gear voltage or a rapidly oscillating voltage depending on whether the power sources 6 () eh 7 are formed. of alternating current or DC motors. The power supply device also emits a signal superimposed on this voltage, which emits during the time when torque is to be transmitted to the rotatable member 10. As a result, the force sources will cause the intermediate bodies 3 and 4 to either oscillate relative to the fasteners. 1 without otherwise laying relative to these or oscillating and at the same time rotating relative to the rocks. However, the oscillating motion, which has the task of reducing the starting friction moment of the rotatable member to a level comparable to that of the grille in the same member, is not desired to receive overford from the intermediate bodies.

Genom att anpassa torsionsstavens 12 dimensioner och mellankropparnas 3 och 4 massor i forhallande till det roterbara organets massa astadkommes att torsionsstaven av mellankropparnas rorelser overfor i huvudsak enbart rotationen till det roterbara organet. By adapting the dimensions of the torsion bar 12 and the masses of the intermediate bodies 3 and 4 in relation to the mass of the rotatable member, it is achieved that the torsion bar of the movements of the intermediate bodies opposite essentially only the rotation to the rotatable member.

I de fall man icke kan tolerera att en mind-re del av oscillationen overgar till det roterbara organet kan man lampligen disponera stromforsorjningsanordningen sa, att oscillationsrorelserna hos de hada kraftkallorna 6, 7 och armed ocks& hos mellankropparna 3, 4 bli inbordes fasforskjutna en halv period.. Fog den harav blir att den ena torisionsstayens eventuella oscillerande inverkan pa det roterbara organet fortlopande motverkas av den andra torsionsstavens inverkan. In cases where a smaller part of the oscillation cannot be tolerated to the rotatable member, the power supply device can suitably be disposed of so that the oscillation movements of the hated power sources 6, 7 and armed also of the intermediate bodies 3, 4 are in-phase shifted for half a period. .. The result is that the possible oscillating effect of one torsion bar on the rotatable member is continuously counteracted by the action of the other torsion bar.

Det i fig. 2-3 visade utforandet skiljer sig fran det beskrivna darigenom, att det roterbara organet, bar betecknat med 13, icke fir radiellt styrt av sjfilva mellankroppen 14. Lagerreaktionerna upptages i stallet av en elastisk koppling 15 bestdende av ett system av radiella Iran mellankroppen till en axeltapp 16 pa det roterbara organet gaende armar 17. I axeltappen dro gjorda urfrfisningar mot vilkas radiella bottnar 18 armarnas inre andar aro fastskruvade och pa motsvarande sa.tt aro de yttre amiarna f5.sta vid axiellt gaende stodytor 19 pa mellankroppen. 24.ven i den utforingsform, som visas i 4-5 uppbfires det roterbara organet, 20, av en elastisk koppling 21, sammansatt av radiellt gaende armar 22. Det roterbara organets ande liar formen av ett ror 23, dir slit; sar aro upptagna sd att armarna kunna inpassas dari och fastas vid roret. Kopplingen skiljer sig fran &riga utfOranden ocksa dar- igenom att dess nay 24 uppbar en centralt anordnad svangmassa 25, vilken Ar fritt upp- hangd relativt mellankroppen 26. Da. den senare oscillerar kommer ocksa svangmassan under inverkan av armarna 22 att bibringas en snabbt vaxlande fram- och atergaende relse. Under forutsattning av ratt valda dimensioner pa svangmassan 25, mellankrop- pen. 26 och armarna 22 intruder resonans i det svangande systemet varvid nodpunkter uppkomma i armarna mellan de punkter, i vilka armarna aro infasta vid navel 24 och mellankroppen 26. Dit nodpunkterna sammanfalla med de punkter, i vilka roret 23 ar upphangt, forhindras ett overforande av oscillationen. The embodiment shown in Figs. 2-3 differs from that described in that the rotatable member, designated 13, is not radially guided by the intermediate body 14. The bearing reactions are received instead of an elastic coupling 15 consisting of a system of radial Iran the middle body to a shaft pin 16 on the rotatable member extending arms 17. In the shaft pin, recesses were made against the radial bottoms of which the inner spirits of the arms 18 are screwed and in a corresponding manner the outer members are first at axially extending support surfaces 19 on the middle body. 24. also in the embodiment shown in 4-5, the rotatable member, 20, is supported by an elastic coupling 21, composed of radially extending arms 22. The spirit of the rotatable member is in the form of a tube 23, which is worn; sar are occupied so that the arms can be fitted therein and fastened to the rudder. The coupling differs from other embodiments also in that its nay 24 supported a centrally arranged pivot mass 25, which is freely suspended relative to the middle body 26. Da. the latter oscillates, the swing mass will also, under the influence of the arms 22, be imparted to a rapidly oscillating reciprocating motion. Assuming the right selected dimensions of the arch mass 25, the middle body. 26 and the arms 22 intrude resonance in the oscillating system, with node points occurring in the arms between the points in which the arms are attached to the navel 24 and the intermediate body 26. Where the node points coincide with the points in which the tube 23 is suspended, transmission of the oscillation is prevented .

Det roterbara organet kommer f8ljaktligen att antingen sta stilla eller att vrida sig synkront med mellankroppen dit denna roteras relativt fastet. The rotatable member will consequently either stand still or rotate synchronously with the intermediate body where it is rotated relatively firmly.

Uppfinningen ar ej begransad till de ovan beskrivna utforingsexemplen utan omfattar awn vane modifikation, som inses av fackmannen och faller inom ramen for den i patentanspraken angivna uppfinningstanken. The invention is not limited to the embodiments described above, but comprises the usual modification, which will be appreciated by the person skilled in the art and falls within the scope of the inventive idea stated in the patent claims.

Claims

Patent claim:

A storage and drive device, preferably for gimbal-mounted rotatable means, comprising an intermediate body mounted in a hurry, which supports the rotatable member and is kept in continuous motion to reduce the starting frictional moment of the member, characterized in that the intermediate body (3, 4; 14; 26) which is partly connected by a force cold (6, 7), arranged to cause the middle body to either oscillate relative to the fastener (1) or to oscillate and at the same time rotate relative to the fist, partly united with the rotatable member (10; 13; 20) by an elastic coupling (12; 15; 21), arranged to transmit only or substantially only the rotation to the rotatable member by movements of the interbody.

Storage and drive device for rotatable members suspended in two intermediate bodies and each of which is cold-cold, according to patent claim 1, characterized in that the intermediate bodies (3, 4) are so affected by the force bodies (6, 7) that the oscillation of one intermediate body continuously for a phase-shifted half-period in relation to the oscillation of the second intermediate body, in which case the possible oscillating effect of the elastic couplings (12) on the rotatable member (10) must continuously counteract each other.

Storage and drive device according to claim 1 or 2, characterized in that a central bore (8) is made in the intermediate body (4), in which a shaft pin (9) on the rotatable member (10) is mounted and through which the tensioner a torsion bar or the like extending axially from the bottom of the bore to the shaft journal (12).

Storage and drive device according to claim 1 or 2, characterized in that the elastic coupling (15; 21) consists of a system of radial arms or spring bands (17; 22) supporting radial rotatable member (13; 20). .

5. A storage and drive device according to claim 4, characterized in that the elastic coupling (21) has a central, relatively intermediate body (26) freely suspended. pivot mass (25) and that the arms or spring bands (22) of the coupling are attached to recesses on the rotatable member, which are so coated that they form nodes when the intermediate body and the pivot mass are caused to oscillate. Cited publications: Patents frCut France 874 660; USA. 1 468 322.