SE186007C1

SE186007C1 -

Info

Publication number: SE186007C1
Authority: SE
Publication date: 1963-01-01

Description

Uppfinnare: F Georges Prioritet begcird fain den 3 juni 1957 (Belgien) Foreliggande uppfinning avser ett servoaggregat med en for drivning av en apparat avsedd drivmotor, vilken är forbunden med apparaten medelst en drivanordning. Inventor: F George's Priority Started June 3, 1957 (Belgium). The present invention relates to a servo unit having a drive motor for driving an apparatus, which is connected to the apparatus by means of a drive device.

Ett servoaggregat av liar avsedd typ kan exempelvis anvandas for att stanga och Oppna luckor eller ventiler, dar det erfordras soxskilda driftbetingelser, exempelvis att det vid start skall vara mojligt att temporart utava en kraft overstigande den normalt genom aggregatet utovade maximikraften och att avenledes kunna installa den tid under vilken den storre kraften kan palaggas pa en. utgaende axel. A servo unit of the intended type can, for example, be used to close and open doors or valves, where different operating conditions are required, for example that at start-up it must be possible to temporarily exert a force exceeding the maximum force normally exerted by the unit and to be able to install it time during which the greater force can be applied to one. output shaft.

Den normalt fOreliggande maximikraften pa den utgaende axeln skall aven vara install-bar. The normally present maximum force on the output shaft must also be installable.

Det är aven onskvart att drivmotorn stoppas nar den utgaende axeln stoppas, eftersom man icke 8nskar att drivmotorn skall arbeta vid stoppad utgaende axel. It is also undesirable for the drive motor to be stopped when the output shaft is stopped, since it is not desired that the drive motor should operate at the output shaft stopped.

Redan tidigare aro servoaggregat kanda, vilka arbeta med ett flertal planetvaxlar och organ, som utova en kontinuerlig bromsning pa vissa element. Dylika servoaggregat ha vi-sat sig vara besvarliga och dyrbara aft tillverka. Already, servo units are known, which work with a plurality of planetary shafts and members, which exert a continuous braking on certain elements. Such servo units have proven to be cost-effective and expensive to manufacture.

Det i enlighet med den foreliggande uppfinningen avsedda servoaggregatet kannetecknas av att en med drivmotorn forbunden drivaxel är kopplad till en planetvaxel, vars utgaende axel är forbunden med planetvaxelns planethjulbarare och uppbar en efter en -viss, installbar tid verksam fOrdrojnings- och kopplingsanordning, varvid en yttre och for upptagande av ett reaktionsmoment anordnad kuggkrans i planetvaxeln är kopplad till en blockerbar och genom fordrojnings- och kopp- Dupl. kl. 42 r: 2/01; 47 g: 45/03; 47 h: 27 lingsanordningen i drivanordningen till apparaten inkopplad momentbegransningsanordning, varjamte forefinns en genom momentbegransningsanordningen i densam.mas icke blockerade lage pa.verkbar signal- och sparranordning. The servo unit intended in accordance with the present invention can be characterized in that a drive shaft connected to the drive motor is connected to a planetary shaft, the output shaft of which is connected to the planetary gear carrier of the planetary shaft and carried a displacement and coupling device which operates after a certain installable and for receiving a torque arranged gear in the planetary gear is coupled to a blockable and by displacement and cup- Duplex. at 42 r: 2/01; 47 g: 45/03; 47 h: 27 the torque limiting device connected to the apparatus in the drive device, and there is also a layer which can be actuated by the torque limiting device in the unobstructed signal and sparing device.

I en utforingsform av uppfinningen styr planetvaxeln, som fir monterad pa en. planetbarare, en. kuggkrans, som liar utsprang, vilka samverka med en vridmomentbegransare. In one embodiment of the invention, the planetary gear, which is mounted on one, controls. planetbarare, a. sprocket, which liar protruded, which cooperate with a torque limiter.

Fordrojningsorganet fir nirbundet med planetbararen och bestar i huvudsak av ett kugghjul med flera kuggar, vilka kunna paverkas av en tapp, son' är fastad pa planetbararen. Detta kugghjul samverkar med tandade hjul, som aro reglerbara till sitt lage och gara det mojligt fOr tappen att driva en skiva, som är fast forbunden med en anordningens axel omgivande, ihalig axel, fOrst offer en viss tid. The displacement means is connected to the planetary carrier and consists essentially of a gear with several teeth, which can be actuated by a pin, which is attached to the planetary carrier. This gear cooperates with toothed wheels, which are adjustable to their position and make it possible for the pin to drive a disc, which is fixedly connected to a surrounding shaft, hollow shaft, first sacrificing a certain time.

Denim begransningsanordning är placerad mellan skivor med spiralformiga spar, vilka drivas av bommar pa den ihaliga axeln. Denim fastening device is placed between discs with helical grooves, which are driven by booms on the hollow shaft.

Dessa skivor samverka med sparrsldvor, som lata kuggkransen rotera fritt i en riktning och stoppa kransen i den andra, om axeln stoppas av ett motstand, som overstiger gransviidmomentet. These discs cooperate with asparagus blades, which allow the ring gear to rotate freely in one direction and stop the ring in the other, if the shaft is stopped by a resistor which exceeds the torque width.

Signal- och stoppanordningen bestar lampligen av en. excenter eller en kam, som fir anordnad omkring kuggkransen, sa att element, da derma ãr frigiven, forsittas i rOrelse genom frigivandet av kransen far att genomfora signalering och stoppa motorn. Alla elementen aterforas sedan automatiskt till ett lage, som medger igangsattning i motsatt riktning under inverkan av fOrdrojningsanordningen. The signal and stop device suitably consists of one. eccentric or a cam, which is arranged around the ring gear, so that elements, when released, are displaced in motion by the release of the ring to carry out signaling and stop the motor. All the elements are then automatically returned to a bearing, which allows start-up in the opposite direction under the influence of the displacement device.

Uppfinningen kommer i det foljande att beskrivas narmare med hanvisning till bifogade ritning, vilken som exempel visar en utforingsform. Fig. 1 är ett axialsnitt genom anord- ningen. Fig. 2 är ett snitt efter linj en1 fig. 1. Fig. 3 är ett snitt efter linjeni fig. 1. Fig. 4 och 5 aro• snitt efter linj en IV—IV i fig. 1 i olika lagen. Fig. 6 visar de spiralfor-- miga sparen i det ena av elementen. Fig. 7 vi- sar sparrskivan till ett annat element. Servoaggregatet eriligt uppfinningen omfattar ett antal samverkande delar, av vilka i Mr forekommande fall anardningen for momentett fordiojningsorgan och en anordning for signalering och stoppande av drivmotorn tilldraga sig sarskilt intresse. The invention will be described in more detail below with reference to the accompanying drawing, which shows by way of example an embodiment. Fig. 1 is an axial section through the device. Fig. 2 is a section along line 1 in Fig. 1. Fig. 3 is a section along the line in Fig. 1. Figs. 4 and 5 are a section along line IV-IV in Fig. 1 in different layers. Fig. 6 shows the helical grooves in one of the elements. Fig. 7 shows the ratchet plate to another element. The servo unit according to the invention comprises a number of cooperating parts, of which in cases occurring in Mr the device for momentary digestion means and a device for signaling and stopping the drive motor attract particular interest.

I den visade anordningen driver en drivaxel 1, se fig. 1 pa vilken är fastkilad ett cell-trait kugghjul 2, Over en planetbarare 3 och planethjul 1 en utgaende axel 5 och en invandig kuggkrans 6, som hindras att rotera av en begransningsskiva 7, som ingriper med kugg-- kransens 6 utsprang 8. Dessa medge en viss vridning av kuggkransen, innan de stoppas av begransningsskivan 7, se fig. 4 och 5. In the device shown, a drive shaft 1, see Fig. 1, on which a cell-trait gear 2 is wedged, over a planet carrier 3 and planet gear 1 an output shaft 5 and an internal gear ring 6, which is prevented from rotating by a pulley 7, which engage with the projections 8 of the ring gear 6, These allow a certain rotation of the gear ring, before they are stopped by the limiting disc 7, see Figs. 4 and 5.

Momentbegransaren. The torque limiter.

Om kuggkransen 6 paverkas och fasthalles genom en broms, kommer kuggkransen att satta sig i rotation genom den pa planethjulen utovade tangentiella kraften, nar denna kraft tiverstiger den palagda bromskraften. Andamhlet med momentbegransaren är att kunna variera denna begransande verkan av bromsningen. If the gear ring 6 is actuated and held by a brake, the gear ring will set in rotation by the tangential force exerted on the planet gears, when this force exceeds the applied braking force. The spirit of the torque limiter is to be able to vary this limiting effect of braking.

Det är tydligt, att nar kuggkransen 6 ar ororlig, motsvarar den tangentiella kraft som planethjulen mottaga det vridmoment, som av planethjulen overfores till den utgaende axeln 5 medelst planetbararen. 3. Det är darfor tillraekligt att tilldela den kuggkransen 6 verkande bromskraften ett varde som motsvarar det maximala vridmomentet som den atga.ende axeln skall utsattas for, att varje ytterligare pa'verkan av den utgaende axeln 5 skall astadkomma en sadan tangentiell kraft pa kuggkransen 6, att denna kraft overstiger bromsverkan ph kuggkransen och därför at-ter kuggkransen 6 i rtirelse och darvid stoppar planetbararen 3 och den drivna axeln 5. It is clear that when the gear ring 6 is immobile, the tangential force with which the planet gears receive corresponds to the torque transmitted by the planet gears to the output shaft 5 by means of the planet carrier. 3. It is therefore sufficient to assign the braking force acting on the gear ring 6 a value corresponding to the maximum torque to which the acting shaft is to be subjected, so that any further action of the output shaft 5 will produce such a tangential force on the gear ring 6. , that this force exceeds the braking action ph the gear ring and therefore the gear ring 6 rotates again and thereby stops the planet carrier 3 and the driven shaft 5.

For att astadkomma denna variabla bromsning omfattar kuggkransens S utsprang 8, som ingripa i spar i begransningsskivan 7. Da kuggkransen 6 sines i rotation, medtar den genom utsprangen 8, vilka ingripa i sparen i hegransningsskivan 7, den sistnamnda. Omvant kommer ett Mrhindrande av begransningsskivans 7 rotation att avenledes hindra att kuggkransen 6 roterar. In order to effect this variable braking, the projections 8 of the gear ring S, which engage in grooves in the delimiting disc 7. When the gear ring 6 is in rotation, it comprises, through the projections 8, which engage in the grooves in the clearing disc 7, the latter. Conversely, an obstacle to the rotation of the boundary disc 7 will likewise prevent the ring gear 6 from rotating.

For att hindra begransningsskivan 7 Fran att rotera forran den utsittes for en viss kraft tryckes skivan 7 mot en fast platta 9 genom en forskjutbar platta 10. Genom denna anliggning lanes begransningsskivan 7 ororlig pa grand av friktionen, sa lange som denna friktion Overstiger vardet av det vridmoment som utevas pa kuggkransen 6 genom planethjulen (och clamed ocksa pa skivan 7 pa grund av de fran kuggkransen 6 utgaende utsprangen 8, vilka ingripa i skivans 7 spar). In order to prevent the limiting disc 7 from rotating before it is subjected to a certain force, the disc 7 is pressed against a fixed plate 9 through a displaceable plate 10. By this abutment the limiting disc 7 is moved immovably due to the friction, as long as this friction exceeds the value of it. torque exerted on the ring gear 6 by the planet gears (and also clamed on the disc 7 due to the projections 8 emanating from the gear ring 6, which engage in the grooves of the disc 7).

Det tryck som den forflyttbara plattan 10 utovar pa skivan 7 Mr att trycka den sist-namnda mat den fasta plattan 9 astadkommes genom fjadrar 11, vilkas tryck, och foljaktligen (let tryck varmed skivan 7 tryekes mot plattan 9, installes medelst en gangad ring 12, som vid inskruvning okar trycket genom att sammantrycka fjddrarna 11 och vid utskruvning minskar trycket genom att rata fjadrarna 11 slappna. Genom den gangade ringen 12 är det darfOr majligt att installa den maximala kraft som kan palaggas den utgaende axeln 5, och denna kraft fir densamma som den kraft for *Mien axeln 5 stoppas. The pressure which the movable plate 10 exerts on the disc 7 Mr to press the latter food the fixed plate 9 is provided by springs 11, the pressure of which, and consequently (the slight pressure with which the disc 7 is pressed against the plate 9, is installed by means of a threaded ring 12). , which when screwed in increases the pressure by compressing the springs 11 and when screwing down the pressure decreases by ratcheting the springs 11. Relaxed through the running ring 12 it is therefore possible to set the maximum force that can be applied to the output shaft 5, and this force for the same as the force for * Mien axis 5 is stopped.

Har skall ytterligare framhallas fOljande: Vid starten Sr det n5dvandigt att det skall vara mojligt att temporart utOva en kraft overstigande den genom den gangade ringen 12 installda maximikraften och att avenledes kunna installa: den tid under vilken den stone kraften kan palaggas utan att den..utgaende axeln 5 stoppas. The following must be further emphasized: At the start it is necessary that it should be possible to temporarily exert a force in excess of the maximum force installed through the running ring 12 and to be able to install accordingly: the time during which the stone force can be applied without it .. output shaft 5 is stopped.

Mr den utgaende axeln 5 stoppas, Ur det aven nodvandigt att astadkomma en anordning for att hejda drivmotorn, som annars skulle fortsatta att arbeta. Mr. the output shaft 5 is stopped, It is also necessary to provide a device for stopping the drive motor, which would otherwise continue to operate.

FOr att den utgiende axeln 5 skall kunna utsattas f5r en kraft, som temporart Sr stone an den genom den gangade ringen 12 installda kraften, ar det nodvandigt att tempordrt fastlasa kuggkransen 6 genom en anordning for Ruing av vridmomentet, men denna anordning fdr icke vara verksam an.nat an under en begransad tid, nfir vid starten ett okat moment skall uttagas, och denna begransade tid skall upphiira, nar momentbegransaren skall atertaga sin funktion. In order for the output shaft 5 to be subjected to a force which is temporarily equal to the force set by the passing ring 12, it is necessary to temporarily lock the gear ring 6 by means of a device for roughening the torque, but this device must not be effective. an.nat an during a limited time, nfir at the start an increased torque shall be taken, and this limited time shall cease when the torque limiter shall resume its function.

Anordningen for momentokning. The device for torque increase.

Plattorna 9 och 10, vilka kvarhalla skivan 7, aro vardera forsedda med Under eller klor, vilka pa de hada plattorna aro anbragta at skilda hall, eftersom det Sr fraga om tva rotationsriktningar. The plates 9 and 10, which retain the disc 7, are each provided with mirrors or claws, which on the had plates are arranged in different directions, since it is a question of two directions of rotation.

I fig. 7 utgora tanderna 31 en del av plattan 10, som Sr forflyttbar men icke vridbar och som tryekes mot begransningsskivan 7 genom fjadrarna 11. Tanderna 32 utgora en del av plattan 9, som Sr stationar. In Fig. 7, the teeth 31 form part of the plate 10, which Sr is movable but not rotatable and which is pressed against the delimiting disc 7 by the springs 11. The teeth 32 form part of the plate 9, which Sr stations.

Mot begransningsskivan 7 verka en serie skivor 23, 24,. 25, 26, 27, 28 och 29. De yttre skivorna 28 och 29 aro likaledes forsedda med tander (se fig. 6 och 7). Against the limiting disc 7 act a series of discs 23, 24 ,. 25, 26, 27, 28 and 29. The outer discs 28 and 29 are likewise provided with teeth (see Figs. 6 and 7).

Skivorna 24 och 27 och skivorna 23 och 26 kunna narmas resp. avlagsnas fran varandra genom kulor 25 och pa sadant sail, att nar skivorna 24 och 27 narma sig varandra avlagsnas skivorna 23 och 26 frail varandra, och omvant. Skivorna 23 och 24 sta i fast forening = med hylsan 22, vilken i sin tur är fast forenad med planetbararen under mellankoppling av fordroj ningsorganet. The discs 24 and 27 and the discs 23 and 26 can be approached respectively. are spaced apart by balls 25 and on such a sail that when the discs 24 and 27 approach each other the discs 23 and 26 are spaced apart, and vice versa. The discs 23 and 24 are in fixed union = with the sleeve 22, which in turn is firmly joined to the planetary carrier during interconnection of the displacement means.

Vid start i riktningen A skall anordningen for Okning av momentet hindra att kuggkransen 6 vrider sig i riktningen B, ty pakanningen vid starten är stone an den kraft, som instants genom den gingade ringen 12 och som paverkar begransningsskivan 7 under mellankoppling av fjadrarna 11 och den fOrflyttbara plattan 10, vilken tryeker begransningsskivan 7 mot den fasta plattan 9, varjamte, sasom f8rut sagts, skivan 7 hailer kuggkransen 6 genom att densammas litspring 8 ingripa i spar skivan 7. When starting in the direction A, the device for increasing the torque must prevent the gear ring 6 from turning in the direction B, because the packing at the start is stone by the force which is instantaneous through the ginged ring 12 and which acts on the limiting disc 7 during interconnection of the springs 11 and the The movable plate 10, which presses the delimiting disc 7 against the fixed plate 9, and, as previously stated, the disc 7 hails the ring gear 6 by engaging the same disc spring 8 in the spare disc 7.

Vid start i riktningen A komma kulorna 25 att atskilja skivorna 23 och 26 under det att skivorna 24 och 27 gá narmare varandra, dvs. I detta 8gonblick har skivans 29 Under tillfalle att haka ihop med plattans 10 Milder. When starting in the direction A, the balls 25 will separate the discs 23 and 26 while the discs 24 and 27 approach each other, ie. At this moment, the disc's 29 has the opportunity to hook up with the record's 10 Milder.

Skivorna 28 och 29 genomgas likaledes av kuggkransens 6 utsprang. Kuggkransen 6 dr saledes orOrlig, dä skivan. 29 med sina tander hakat i plattans 10 tander, anda fram till den tidpunkt dà fordrojningsorganet frigjort ski-van 29. Kuggkransen 6 kan darfor joke vrida sig i riktningen B under en start i riktningen A, och detta forhallande forefinns anda till dess att genom fordrojningsorganets ingripande skivan 29 frigjorts. The discs 28 and 29 are likewise penetrated by the protrusions of the ring gear 6. Kuggkransen 6 dr saledes orOrlig, dä skivan. 29 with its teeth hooked in the teeth of the plate 10, breath until the moment when the displacement means releases the disc 29. The gear ring 6 can therefore joke turn in the direction B during a start in the direction A, and this delay exists until until by the displacement means engaging disc 29 released.

FOrdroj ningsorganet. The displacement body.

Fordrojningsorganet liar till uppgift att astadkomma att den drivna axeln roterar ett antal vary innan den bortkopplar anordningen for Okningen av momentet. The actuating means has the task of causing the driven shaft to rotate a number of variables before disconnecting the device for increasing the torque.

Det dr att lagga marke till att planetbararskivan 3 har en tapp 13 (se fig. 3) och en sparrkrage eller ring 14. Omkring den nighende axeln 5 finns en hylsa eller ihalig axel 22, pa vilken är fastsatt en skiva 21 (se fig. 1). Skivan 21 omfattar ett kugghjul 16, sow pa ena sidan har sex kuggar eller tander (se fig. 3) och pa den andra sidan. tappar 17 och 18 (se fig. 2). De hada tapparna 17 och 18 ga in I tandluckor i tandhjulen eller steghjulen 19 och 20 (se fig. 1). It should be noted that the planetary bar plate 3 has a pin 13 (see Fig. 3) and a ratchet collar or ring 14. Around the adjacent shaft 5 there is a sleeve or hollow shaft 22, on which a disc 21 is attached (see fig. 1). The disc 21 comprises a gear 16, sow on one side has six teeth or teeth (see fig. 3) and on the other side. pins 17 and 18 (see Fig. 2). The had pins 17 and 18 went into tooth gaps in the gears or the sprocket 19 and 20 (see Fig. 1).

Det av skivan 21, den ihaliga axeln 22 oeb kugghjulet 16 bestaende fordrojningsorganet roterar joke. For yarje vary av planetbararen 3 kommer tappen 13 att vrida kugghjulet 15 en kugg eller tand 15. Allteftersom kugghjulet 16 vrider sig, komma de tva tapparna 17 och 18 att vrida steghjulen 19 och 20 till dess att en av de igenfyllda tandluckorna kommer att sparra den ena av tapparna 17 eller 18. Fran detta ogonblick kommer planetbararen 3 och tappen 13, som ár fast pa densamma, att rotera annu ett vary innan tappen 13 kommer till anliggning mot en kugg eller tand 15 ph det nu stillastaende kugghjulet 16. Planetbararen 3 kommer att via tappen 13, kugghjulet 16, som nu ar stillastaende, och foljaktligen via skivan 21 och den ihaliga axeln 22, att driva de sistnamnda delarna I samma riktning som planetbararen 3, dvs. i samma riktning som den utgaende axeln 5 roterar. The displacement means consisting of the disc 21, the hollow shaft 22 and the gear 16 rotates the joke. For each variation of the planet carrier 3, the pin 13 will rotate the gear 15 a tooth or tooth 15. As the gear 16 rotates, the two pins 17 and 18 will rotate the sprocket 19 and 20 until one of the filled gaps will lock it. one of the pins 17 or 18. From this moment, the planet carrier 3 and the pin 13, which are attached to it, will rotate another vary before the pin 13 comes into contact with a tooth or tooth 15 ph the now stationary gear 16. The planet carrier 3 will that via the pin 13, the gear 16, which is now stationary, and consequently via the disc 21 and the hollow shaft 22, to drive the latter parts in the same direction as the planet carrier 3, i.e. in the same direction as the output shaft 5 rotates.

Anordning for signalering och stopp. Device for signaling and stopping.

Redan tidigare har papekats, att nar den utgaende, drivna axeln 5 hejdas pa grund av verkan av begransningsskivan 7, b5r man aven astadkomma en anordning for att stoppa drivmotorn, vilken annars skulle fortsatta att arbeta. It has already been pointed out that when the output, driven shaft 5 is stopped due to the action of the limiting disc 7, a device should also be provided for stopping the drive motor, which would otherwise continue to operate.

Det har likaledes redan papekats, att for att astadkomm.a ett stopp av den utgaende axeln 5 yid overbelastning medger begransningsskiyan 7 att kuggkransen roterar i motsatt riktning mot drivaxeln-1. It has likewise already been pointed out that in order to bring about a stop of the output shaft 5 during overload, the boundary plate 7 allows the gear ring to rotate in the opposite direction to the drive shaft-1.

For att astadkomma att motorn stoppas, nar den utgaende axeln 5 stoppas, dvs. nar kuggkransen 6 borjar att vrida sig, Or den sistnamnda forsedd med ett excentriskt spar 34, som paverkar en kamskiva 33, vilken är forsedd med klackar 38 och 39. Kamskivan 33 driver en kamskiva 35, vilken fir koncentrisk med apparatens axel, via anslag 36 och 37 pa. kamskivan 35. To cause the motor to be stopped when the output shaft 5 is stopped, i.e. When the gear ring 6 begins to rotate, the latter is provided with an eccentric groove 34, which acts on a cam disc 33, which is provided with lugs 38 and 39. The cam disc 33 drives a cam disc 35, which is concentric with the axis of the apparatus, via abutment 36 and 37 pa. cam disc 35.

Om den drivna, utgaende axeln 5 drives i riktningen A, varvid aven drivaxeln 1 roterar I riktningen A, korai-11er Yid stopp av den utgaende axeln 5 kuggkransen 6 att b6rj a att rotera I riktningen B. Sa lange som kuggkransen 6 joke roterar i riktningen B, ar excenterkamskivans 33 klack 39 fastlast mot kolven 41. Ndr kuggkransen 6 salter sig i rorelse i riktningen B (yid stopp ay den i riktningen A drivna utgaende axeln), kommer kamskivans 33 klaek 39, som hejdas mot kolven 41, att hindra att excenterkamskivan 33 vrider sig. Det excentriska sparet 31 i kuggkransen 6 kommer vid rotationen att sanka kamskivan 33, vars klack 39 lagger sig under kolven 41. Rarelsen av kamskivan 33, varvid klacken 39 lagger sig under kolven 41 begransas av tjockleken av klaeken 39, ty kamskivans 35 anslag 37 kommer till anliggning mot kolven 41 (se fig. 5). Kuggkransens 6 excentriska spar 34 kommer att yid fortsatt rotation i riktningen B lyfta upp kamskivan 33, vars Mack 39 trycker upp kolven 41. Nar kolven 41 har kommit till en niva som ligger hogre an kanaskivans 35 anslag 37, komma kamskivan 33 och kamskivan 35 att vrida sig, drivna genom friktion, anda till dess att kamskivan 35 kommer till anliggning mot ett stopp 42 (se fig. 4). If the driven output shaft 5 is driven in the direction A, the drive shaft 1 also rotating in the direction A, the stop of the output shaft 5 causes the gear ring 6 to start rotating in the direction B. As long as the gear ring 6 joke rotates in In the direction B, if the lug 39 of the eccentric cam disc 33 is fixed against the piston 41. When the gear ring 6 moves in the direction B (by stopping on the output shaft driven in the direction A), the cam 39 of the cam disc 33, which is stopped against the piston 41, will prevent that the eccentric cam disc 33 rotates. The eccentric groove 31 in the ring gear 6 will, on rotation, lower the cam disc 33, the lug 39 of which lies below the piston 41. The movement of the cam disc 33, the lug 39 settling under the piston 41, is limited by the thickness of the cam 39, because the cam 37 abuts 37 for abutment against the piston 41 (see fig. 5). The eccentric groove 34 of the gear ring 6 will, with continued rotation in the direction B, lift up the cam disc 33, the Mack 39 of which pushes up the piston 41. When the piston 41 has reached a level higher than the abutment 37 of the jaw disc 35, the cam disc 33 and the cam disc 35 will turn, driven by friction, breath until the cam disc 35 comes into abutment against a stop 42 (see Fig. 4).

Under forflyttningen uppat kommer kolven 41 att stoppa motorns rorelse i riktningen A. During the upward movement, the piston 41 will stop the movement of the engine in the direction A.

Nar motom sattes i gang i riktningen B och darvid driver den. utgaende axeln 5 i denna riktning, Or det nodvandigt att kuggkransen 6 kan vrida sig fritt i riktningen A en liten vinkel, sa att kamskivan 35 frigor kolven 41 for att den sistnananda skall aterga till sitt vilolage. Ogonblicket efterat kommer kamskivans 33 klack 38 till anliggning mot kolven 40 och man .erhaller dd ett lage som Or sym- 4— — metriskt i forhallande till det som erhallits det ogonblick den utga.ende axeln stoppades, di den drevs i riktningen A. When the motor was started in the direction B and thereby drives it. the shaft 5 can rotate freely in the direction A at a small angle, so that the cam 35 releases the piston 41 so that the latter can return to its resting position. The moment afterwards the lug 38 of the cam disc 33 comes into abutment against the piston 40 and a position is obtained which is symmetrical in relation to what has been obtained the moment the output shaft was stopped, in which it was driven in the direction A.

For att erhalla denna lilla vinkelriirelse arc utsprangen 8 pa kuggkransen 6, som ga in i sparen pa begransningsskivan 7, nagot mindre an sparen, och skillnaden i langd mellan utspringen och sparen motsvarar en vinkel (se fig. 4) och denna vinkel representerar den fria vinkelrorelse som erfordras for att erhalla ett frigorande av kolven 41 och anliggning ay klacken 38 pa kamskivan 33 mot kolven 40. To obtain this small angular motion, the projections 8 on the ring gear 6, which went into the grooves on the limiting disc 7, are slightly smaller than the grooves, and the difference in length between the projections and the grooves corresponds to an angle (see Fig. 4) and this angle represents the free angular movement required to obtain a release of the piston 41 and abutment of the lug 38 on the cam disc 33 against the piston 40.

Kolvarna 40 och 41 ha, forutom for att hejda motorns gang i den ena eller den andra riktningen, aven till uppgift att astadkomma tandning ay indikeringslampor eller verksamhet av signalklockor eller arbete av flagon annan indikeringsanordning. The pistons 40 and 41 ha, in addition to stopping the running of the engine in one or the other direction, also have the task of effecting ignition of indicator lamps or operation of signal clocks or operation of flag other indicating devices.

Verkningssatt. Effective.

Med ledning av den nu skedda genomgangen ay de olika delarna i servnaggregatet är det mojligt att ange verkningssattet for de enskilda delarna och samverkan mellan de olika delarna. Based on the review that has now taken place of the various parts of the service unit, it is possible to state the mode of action for the individual parts and the interaction between the different parts.

Det antages exempelvis att den utgaende axeln 5 genom momentbegransaren har stop-pats, nar den roterade i riktningen B. I detta stopplage kommer kamskivan 35 att hoj a kolyen 40 (se under F) och tanderna pa skivan 29 haka 1 tandema 31 pa plattan 10. I detta stopplage kommer den ena eller den andra av tapparna 17 och 18 pa kugghjulet 15 att stop-pas genom en ay de igenfyllda tandluckorna pa steghjulet 19 eller 20. It is assumed, for example, that the output shaft 5 through the torque limiter has stopped when it is rotated in the direction B. In this stop position the cam disc 35 will raise the collet 40 (see under F) and the teeth on the disc 29 hook 1 the teeth 31 on the plate 10 In this stop position, one or the other of the pins 17 and 18 on the gear 15 will be stopped through one of the filled tooth gaps on the sprocket 19 or 20.

Vid start ay motorn i riktningen A frig5res kolven 40 darigenom att kuggkransen 6 utfor en liten vinkelr5relse i riktningen 13. Mr denna lilla vinkelrorelse liar skett, stoppas kuggkransen 6 via skivan 29, vars -Under haka i tanderna i plattan 10 (se under D). When starting the engine in the direction A, the piston 40 is released by the gear ring 6 making a small angular movement in the direction 13. When this small angular movement has taken place, the gear ring 6 is stopped via the disc 29, whose -Under the teeth in the plate 10 (see under D) .

Vid paborjandet av verksamheten kan pa grund av sp5.rrningen kuggkransen 6 icke rotera i riktningen B, oavsett vilken overbelastning det ãr fraga cm, och den utgaende axeln 5 stoppas darfor icke. Under denna inledande fas sattes det i fordrojningsorganet inghende lilla kugghjulet 16 i rorelse under ett antal vary coin bestammes ay det antal vary som planetbararen 3 maste utf5ra for det antal tandluckor som skiljer de tva igenfyllda tandluckorna pa steghjulen 19 och 20 (se under E). At the start of the operation, due to the locking, the ring gear 6 cannot rotate in the direction B, regardless of the overload it is in question, and the output shaft 5 is therefore not stopped. During this initial phase, the small gear 16 included in the displacement means was set in motion during a number of variations. The number of variations that the planet carrier 3 must perform for the number of tooth gaps separating the two filled gaps on the gears 19 and 20 (see under E) is determined.

Nar en. av kugghjulets 16 tappar 17 eller 18 kommer i beroring med den igenfyllda tandluckan, kommer fardrojningsorganet att sattas i yerksamhet vid det foljande yarvet genom planetbararen 3 via tappen 13, vilken sistnamnda kommer till anliggning mot en tand eller kugg 15 i det numera stillastaende kugghjulet 16 (detta forklarar varfor vid en start alltid en av tapparna 17 eller 18 Or i beroring med en igenfylld tandlucka). Den iha liga axeln 22 borjar darfor att rotera i samma riktning som den utgaende axeln 5. Nar en. of the pins 17 or 18 of the gear 16 come into contact with the filled tooth gap, the travel means will be actuated at the next leg by the planet carrier 3 via the pin 13, the latter coming into abutment against a tooth or tooth 15 in the now stationary gear 16 ( this explains why at a start always one of the pins 17 or 18 Or in contact with a filled tooth gap). The hollow shaft 22 therefore begins to rotate in the same direction as the output shaft 5.

Pa den ihaliga axeln. 22, som roterar i riktningen A, arc skivorna 23 och 21 fastsatta. Nar skivorna 23 och 24 b8rja att rotera, komma kulorna 25, vilka rulla i spiralspar i de motsta.ende skivorna. 23 och 26 och 24 och 27, att skilj a isar skivorna 24 och 27 och att flytta ihop skivorna 23 och 26. On the ihaliga shoulder. 22, which rotates in the direction A, the arc discs 23 and 21 are fixed. When the discs 23 and 24 start to rotate, the balls 25, which roll in spiral pairs in the opposite discs, come. 23 and 26 and 24 and 27, to separate the disks 24 and 27 and to move the disks 23 and 26 together.

Vid forflyttningen av skivan 24 kommer skivan 27 att forflytta plattan 10 bort fran skivan 2, vars Under darfor ga ur ingreppet med plattans 10 tander. Pa samma gang nar- ma sig skivorna 23 och 26 varandra. Da ski-van 26 narmar sig skivan 23, liar detta den verkan att skivan 28 forflyttas narmare plat-tan R. Tanderna pa skivan 28 konuna d. i beroring med tanderna pa plattan 9'. During the movement of the disc 24, the disc 27 will move the plate 10 away from the disc 2, the mandrel of which therefore disengages from the teeth of the plate 10. At the same time, the discs 23 and 26 approach each other. As the disc 26 approaches the disc 23, this has the effect that the disc 28 is moved closer to the plate R. The teeth on the disc 28 are in contact with the teeth on the plate 9 '.

Sammanfattande framgar saledes, att vid en start i riktningen A kommer inledningsvis kuggkransen 6. icke att rotera i riktningen B pa, grund av att kuggkransens rotation i riktningen B är stoppad, vilket astadkommits ge- nom skivan 29. Vid fOrdrojningsorganets tra- dande i verksamhet frigores skivan 29 och kuggkransen. 6 kan darefter rotera i riktning- en B vid en overbelastning, Aiken sker under styrning genom begransningsskivan 7. Skivan 28 kan yid anliggning mot plattan R rotera i riktningen B genom att tanderna pa skivan glida mot tanderna pa plattan, men den stop-par kuggkransen 6, sa att den sistnamnda icke kan rotera i riktningen A, vid en senare start i riktningen B. In summary, it thus appears that at a start in the direction A, the gear ring 6 will initially not rotate in the direction B pa, because the rotation of the gear ring in the direction B is stopped, which has been achieved through the disc 29. When the displacement member comes into operation the disc 29 and the gear ring are released. 6 can then rotate in the direction B at an overload, Aiken takes place under control through the limiting disc 7. The disc 28 can in abutment against the plate R rotate in the direction B by the teeth on the disc sliding towards the teeth on the plate, but it stops the ring gear 6, said that the latter can not rotate in the direction A, at a later start in the direction B.

Skivorna 23 och 24 arc oberoende av be-. gransningsskivan 7. Sldvorna 23 ocb 26 lik- som skivornas 24 och 27 rorelseslag 5.ro be- gransade till den relativrorelse som erfordras for erhallande ay ingrepp resp. frigorande fran ingrepp mellan tanderna pa skivorna 28 och 29 och som erhalles genom med fjadrar forsedda stanger. Dessa stanger forbinda skivor- na 26 och 27. Fjadrarna strava efter att fora ihop skivorna. Tappar som aro anbragta pa skivorna 23 och 21 begransa slaglangderna genom anliggning mot stangerna. The discs 23 and 24 arc independently of be-. gransningsskivan 7. Sldvorna 23 ocb 26 lik- som skivornas 24 och 27 rorelseslag 5.ro begransade till den relativrorelse som for required afhalande ay ingrepp resp. releasing from engagement between the teeth on the discs 28 and 29 and which is obtained by rods provided with springs. These rods connect the discs 26 and 27. The springs struggle to line the discs together. Pins mounted on the discs 23 and 21 define the strokes by abutment against the rods.

Claims

Patent claim:

A servo unit with a propulsion drive for a device intended for an apparatus, which is connected to the apparatus by means of a drive device, characterized in that a drive shaft (1) connected to the drive motor is connected to a planetary shaft (2-4), the output shaft (5) of which Connected to the planetary gear carrier (3) of the planetary gear unit and supported a displacement (13-22) and coupling device (22-27) operating after a certain, installable time, in which case an outer ring gear (6) arranged in the planetary gearbox (6) 2 = 4) is connected to a blockable and torque limiting device (7, 9-12, 28-32) connected to the device (7, 9-12, 28-32) connected to the device in the drive device and to the blocking and coupling device in the drive device. and sparring device (33-43).

Servo unit according to claim 1, characterized in that the ring gear (6) a "is provided with projections (8), which are arranged to cooperate with a limiting disc (7) which enters the torque limiting device.

Servo unit according to claim 1 or 2, characterized in that the displacement device (13-22) is supported by the planetary gear carrier (3) and essentially consists of a gear (16) with a plurality of teeth (15), with the gear arranged to be driven through a mounted on the planetary gear carrier first pin (13) and by means of two pin (17, 18) and diametrically opposed pins fixed to the gear wheel (16) for co-operation with two recesses and in & Aga about the team in relation to each other installable disc wheels (19, 20) , whereby by means of a advancement of the gear (16) a gear for each rotation of the first pin (13) a drive is made possible only after a certain time by a disc (21), which is connected to one with the output shaft (5). ) concentric halaxel (22).

Servo unit according to any one of claims 1-3, characterized in that the torque limiting disc (7) in the morning limiting device is arranged between further discs (23, 24) provided with helical grooves in the coupling device, with the latter additional discs arranged to be driven through the tail shaft ( 22).

The servo unit according to any one of claims 1-4, characterized in that it is provided with the additional discs (23, 24) and axially adjustable in relation to the additional discs arranged arranged for blocking serving ratchet discs (28, 29), which are connectable to -Lands (31, 32) on lake rotatable means in such a way that the ring gear (6) is allowed to rotate freely in one direction but is blocked at greater torques applied to the output shaft (5) than what corresponds to an installed torque value and then the displacement device (13-22) funnel in business.

Servo unit according to any one of patent claims 1-5, characterized in that the signal and spar device consists of a rotatable but eccentrically arranged cam disc (33) rotatable but eccentrically arranged cam gear, with the cam disc in frictional engagement with the gear ring to be rotated by the latter and with the cam disc further provided with pivoting means (38, 39) resp. stop (36-37), with the impact members resp. the appropriations challenge to connect a signal resp. to stop the drive motor by means of means, for example pistons (40, 41) which are stored in the housing of the planetary gear, and the device is such that all parts and the spar device (33-43) are automatically returned to neutral central layers - in which they with the aid of the displacement device are continue to rotate in the opposite direction of rotation - the ring gear (6) is freely rotatable in relation to the limiting disc (7) Mom a certain angle (a). Cited publications: U.S. Patent Nos. 1,834 5.