SE200044C1

SE200044C1 -

Info

Publication number: SE200044C1
Authority: SE
Publication date: 1965-01-01

Description

Uppfinnare: H Havrenius Foreliggande uppfinning avser en vaxelstallare for sparvaxlar omfattande en manoveranordning for omlaggning av sparvaxelns vaxeltungor mellan, tva andlagen. och en anordning for att -med fjaderkraft liana vaxeltungorna i resp. andlage, innefattande ett par koaxiella, i varandra forskjutbara enheter, av vilka den en.a Or kopplad till man overanor dningen oak den andra Or .kopplad till sparvaxeln.s, vaxeltu.ngor och vilka normalt hallas i lage inuti varandra medelst menan enlieterm.. verkande fjadringsna.gan men Ore inrattade att mat verkan av fjadringsorgane.n utdragas axiellt i den ena eller motsatta riktningen. Inventor: H Havrenius The present invention relates to a gear shifter for spare shafts comprising a control device for rearranging the gear shafts of the spare shaft between the two ends. and a device for - with spring force liana the gear tongues in resp. andlalag, comprising a pair of coaxial, mutually displaceable units, one of which is connected to the man overanor dningen oak the other Or .connected to the sparvaxeln.s, vaxeltu.ngor and which are normally held in a layer within each other by means of a single term. acting spring, but Ore arranged for the action of the spring member to be extended axially in one or the opposite direction.

En vaxelstallare av ovannam.n.f slag 'bar tidigare foregagits vid vRken fjaderkraften mellan de i varandra forskjuthara enheterna astadkommes av en kraftig tryckfj Oder, sem for astadkommande av erforderlig fjaderkraft i sparvaxeln maste inmanteras i enheterna med hog kom,pression, vilket medfor svarigheter och fara for arbetaren vid montering och ev. demontering av fjadern i vaxelstallaren. Dessutom erfordrar en tryckfjader med den langd sam det har Or fraga am styrningar, vilket I sin tur skapar friktionsproblem. A gearbox of the above type was previously provided at either the spring force between the mutually displaceable units is provided by a strong compression spring, which in order to achieve the required spring force in the spare shaft must be installed in the units with high pressure, pressure, which entails responsibilities and danger. for the worker during assembly and possibly. disassembly of the spring in the gearbox. In addition, a compression spring with the length it has requires Or fraga am controls, which in turn creates friction problems.

En vaxelstallare av ovannamnt men forbattrat gag liar enligt uppfinningens primara kannetecken framskaffats darigenom att 0. A gearbox of the above-mentioned but improved gag liar according to the primary pitches of the invention is provided by 0.

Om-se sidor om enheternas andar Oro anordnade ett par axiellt rarligt lagrade ands-tad, och att namnda andstad hallas .anpressade mot nairanda andar m.edelst ett antaI meilan andsti5den verkande .dragfj adrar. About pages about the spirits of the units Oro arranged a pair of axially strangely stored spirits, and that the said ghost town is kept pressed against the spirits by means of a number of spirit springs acting between the spirits.

Uppfinningen skall i det foljande beskrivas narmare med hanvisning till bifagade ritningar, pa vilka Fig. 1 Or en sidovy av vaxelstallaren enligt en utforingsform av uppfinningen. The invention will be described in more detail below with reference to the accompanying drawings, in which Fig. 1 is a side view of the gear stand according to an embodiment of the invention.

Fig. 2 visar den i fig. 1 visade vaxelstallaren sedd uppifran. Fig. 2 shows the shifter shown in Fig. 1 seen from above.

Fig. 3. visar ett kopplin.gsschema for en i va.xelstallaren ingaende autamatisk manoveranordning. Fig. 3 shows a wiring diagram for an automatic control device included in the shaft stand.

Fig. 4 Or en schematisk bild av vaxelstallaren, som visar densanama i ett lage, i vilket vaxeltungorna Ore forflyttade till ett andlage. Fig. 4 Or is a schematic view of the gear stand showing the densities of a bearing in which the gear tongues Ore moved to a bearing.

Fig. 5 askadliggor verkningssattet hos vaxelstallaren, dO vaxeltungorna hindras av ett foremal att farflyttas till det i fig. 4 visade andlaget. Fig. 5 shows the mode of action of the shifter, where the gear tongues are prevented by a mold from being moved to the surface shown in Fig. 4.

Fig. 6 askaddiggor verkningssa.ttet hos vaxelstallaren vid omlaggning av vaxeltungorna med hjalp av p.akorningskraften vid medfart frail ett hjulpar hos ett fordon. Fig. 6 shows the action of the gearbox when changing the gear tongues with the aid of the grinding force when driving a pair of wheels of a vehicle.

Vaxelstallaren bestar generellt av ett langstrackt hus, 1, en autamatisk manoveranordning 2 innefattande ett kraftaggregat for o.mlaggning avisparvaxelns vaxeltungor 3 mellan Iva andlagen och en fjadrande rorelseaverfaringsanordning 4 for overf6rande av kraften frail manoveranordningen till vaxeltungorna och hallande av dessa med fjaderkraft i rasp. andlage. The gear stand generally consists of an elongate housing, 1, an automatic maneuvering device 2 comprising a power unit for repositioning the nozzle tongues 3 of the gearshift shaft between the ends and a resilient motion sensor 4 for transmitting the power from the maneuvering device to the gear tongues and tilting. andlage.

Manoveranordningen 2 omfattar en i en fordjupning i husets ana andelmonterad ,elektrisk motor 5, vars. ,utgaende .axel Or riktad vertikalt uppat och upphar ett koniskt drev 6, spin star i ingrepp med ett andra koniskt k.ugghjul 7, vilket Or fast p.a en axel 8, Isom Or lagrad ett lager 9 pa en vid motorn fast konsol -10. I huset Or pa en vinkelkonsal 11 monterad en elektrisk sakerhetsbrytare 12 for motors urkoppling mid manuell omlaggning am vaxeltungorna, !sasom narmare skall beskrivas i det foljande. The operating device 2 comprises an electric motor 5, mounted in a recess in the housing of the housing, of which. , outgoing shaft Or directed vertically upwards and picks up a conical gear 6, spin is engaged with a second conical gear 7, which is fixed on a shaft 8, Isom Or mounted a bearing 9 on a bracket fixed to the engine -10 . In the housing Or on an angle bracket 11 mounted an electric safety switch 12 for switching off the engine by manual rearrangement of the gear tongues, as will be described in more detail below.

Rarelseoverforingsanordningen 4 innefat tar ett par i varandra forskjutbara .enheter 13, 14, vardera besthende av en uppratt, smal skivformig andvagg 15 °eh ett par fran andvaggens ena sida axial utskjutande rorstanger 16 resp. 17, vilka kommunicera .med mitt, 2— — fOrliggande hal 18 resp. 19 1 andvaggen. De hada stangerna ligga symm.etriskt over resp. under en vinkelratt mot andvaggen ghende centrumaxel, varvid stangerna pa den ena enheten ligga pa stone aystand fran centrum.- axeln an stangerna pa den andra enheten och stangerna pa den ena enheten är anordnade att passer:a genom, oppningar 20 resp. 21 i den. andra enbetens andvagg. Utanfor vardera andvaggens fria vaggsida är .anordnat ett andstod 22 resp. 23, SOTIL liksom andvaggen bestar av en .skiva, i vilken arc upptagna mittfor halm i den narliggande andvaggen liggande hal, som dock alla ha narmelsevis samma diameter som, rorstangernas innerdiameter. Andstoden och ertheterna arc medelst halen resp. rorstangerna individuellt .axiellt forskjutbart lagrade pa fyra langsgaende istyrstanger 25, 26, 27 °eh 28, som straeka sig parallellt med axeln, 8 och aro vid sin ena ande infasta vid konsolen 10 och ,med sin andra ande fastsatta i en gavel 29 pa husets: motsatta ande. The space transfer device 4 comprises a pair of mutually displaceable units 13, 14, each consisting of an upright, narrow disc-shaped duct wall 15 ° and a pair of axially projecting pipe rods 16 and 17, which communicate .with my, 2— - Present hall 18 resp. 19 1 andvaggen. The hada rods lie symmetrically over resp. under a perpendicular to the vent wall facing the center axis, the rods on one unit being at a stone distance from the center.- the axis of the rods on the other unit and the rods on one unit are arranged to fit: a through, openings 20 resp. 21 in it. the second cradle of duckweed. Outside the free cradle side of each duck cradle, a breather 22 or 23, SOTIL as well as the duck cradle consists of a disc, in which the arc occupied opposite the straw in the adjacent duck cradle lying hall, which, however, all have approximately the same diameter as the inner diameter of the rudder rods. The breath and the peas arc by means of the tail resp. the rudder rods are individually axially displaceably mounted on four longitudinal guide rods 25, 26, 27 ° and 28, which extend parallel to the shaft, 8 and are attached at one end to the bracket 10 and, with their other end fixed in a gable 29 on the housing : opposite spirit.

Menai]: de hada andstoden :stracka 'sig longs rorelseoverforingsanordningens sidor ett par andstoden pahakade dragfjadrar 30, vilka ha en anpassiad forspanning. De hada .enheterna, somImedelst andstoden och fjadrarna nor-malt hallas inskjutna i varandra, aro anordnade att forskjutas. fraan °eh tillbaka ph styrstangerna Imed hjalp av en pa. den narmast motor. belagna dndvaggen pasatt mutter 31 och en med derma -samverkande matarganga -32 pa .axeln 8, som frighende genomgar narliggande andstad och errhets andvagg. Vid den andra enhetens andvagg är fast en stang 33, S0111 stracker sig axiellt i linje med axeln 8 och genamgar det andra andstodet ,sarnt husets gavel, dar stangen är forskjutbart lagrad ett lager 34. Stangen 33 Si via en led 35 forhunden med en lank 36, 'SCAM i sin tar via en led 37 Sr kopplad till vaxeltungorna 3. Menai]: de hada andstoden: stretched 'longs rorelseoverforingsanordningens pages a pair of andstoden pahakade dragsprader 30, vhil har å adaptiad prestens. The head units, which by means of the duct and the springs are normally kept pushed into each other, are arranged to be displaced. fraan ° eh back ph handlebars Imed helped by a pa. the nearest engine. coated dndvaggen fitted nut 31 and one with derma-cooperating feed passage -32 on .shaft 8, which frighende undergoes nearby andstad and errhets andvagg. Attached to the duct wall of the second unit is a rod 33, SO111 extending axially in line with the shaft 8 and passing through the second duct, especially the end of the housing, where the rod is slidably mounted one bearing 34. The rod 33 Si via a joint 35 is fitted with a long 36, 'SCAM in its takes via a joint 37 Sr connected to the gear tongues 3.

For att vaxelstallarens furrktion latt shall forstas visas den schematiskt i aka .arbetslagert i fig. 4, 5 och 6. For askadlighetens skull arc styrstangerna 25, 26, 27 och 28 uteldninade och rorstangerna 16 resp. 17 visas massiva. Vidare framgar ur figurerna att de hada enheterna 13 och 14 arc fast forbundna med en stang 38 resp.. 39, vilken Sr parallellt anordnad med axeln 8. Pa var och en av dessa stanger aro tva. anslag 40, 41 resp. 42, 43 stdlibart anordnade. I den vag son" anslagen faljer under vaxelstallarens arbete aro gra'nslagesstrOmstallare belagna ochl figurerna betecknade med 44 for anslaget 40, 45 for anslaget 41, 46 for ansbget 42 resp. 47 f Or :anslaget 43. Medelst en stoppskruv 48 fastas anslagen pa resp. stang, sedan de sh ,stallts in, att deras granslagesstrOmstallare paverkas i ett onskat granslage. Sasom framgar av figurerna erhalles man nu ett par kopplingsfunktioner for :mutterns 31 gransldgen ph gangan 3.2 och ett par kopplingsfunktioner for vaxel tungornas 3 granslagen. Dessa funktioners elektriska betydelse shall neclan narmare for- klara:s med hanvisning till fig. 3, som visar ett kopplingsschema fOr vaxelstallarens ansilutning till ett trefas. vaxelstromsnat. In order that the operation of the gear unit should be easily understood, it is shown schematically in the working bearing in Figs. 4, 5 and 6. For the sake of safety, the guide rods 25, 26, 27 and 28 are fired and the rudder rods 16 and 16, respectively. 17 appear massive. Furthermore, it appears from the figures that the had units 13 and 14 are fixedly connected to a rod 38 and 39, respectively, which Sr is arranged parallel to the shaft 8. On each of these rods there are two. appropriations 40, 41 resp. 42, 43 stdlibart arranged. In the vague son "the appropriations fall during the work of the switchyard aro grnnslagesstrOmstallare belagna ochl figures denoted by 44 for the appropriation 40, 45 for the appropriation 41, 46 for the appendix 42 and 47 f Or: the appropriation 43. By means of a stop screw 48 the appropriations are fixed on resp. rod, after they have been set, that their branch switch is actuated in a desired branch.As shown in the figures, a couple of coupling functions are now obtained for: the nut 31 branch ph gang 3.2 and a pair of coupling functions for the shaft 3 of the shaft tongues. meaning shall be explained in more detail with reference to Fig. 3, which shows a wiring diagram for the connection of the gear unit to a three-phase.

I figuren Sr sjalva vaxelstallaren f Or enkelhets skull endast antydd med sin motor 5, gangan 32, sta.ng 33 saint organ Ufa- granslagesindikering. Natet .anslute.s med fasledningarna till 49, 50 och 51 och noldedningen till en kontakt 52. Fasspanningarna foras darvid genom ett motorskydd 53 till kontakter 54, 55 och 56 resp. 57, 58 och 59 hos tva kontaktorer 60 resp. 61. Kontakterna aro sa anslutna, att vid tillslag ,av kontaktorn. 60 tva av natets fa-ser inkopplas till motor. i en annan ordning an vid tillslag av kontaktorn 61. Harvid kommer motors rotationsriktning att bli beroe.nde av den kontaktor som ar tillslagen. FOr forhindrande av mojlighet till samtidigt tillslag av hada kontaktorerna, har kontaktorn 60 en brytande kontakt 62, som ãr kopplad I serie med kontaktorns 61 spollindning. Pa ,samma satt Sr kontaktorn 61 forsed.d med en brytande kontakt 63, ,som Sr seriekopplad med kontakterns 60 spollindning. I samma kretsar Oro aven, sasom framgar av schemat, inkopplat granslagesstramstallarna 44 och. 45, vilka manOvreras. i .avhdngighet av mutterns 31 granslagen, dar ho.s, resp. stromstallare erhalles en brytande konta:ktfunktion. Bada, kretsarna Oro vidare genom, en tryckstrOmstallare 64 anslutna till en sp.anningskalla, som lag& res av en fas 51 och .nolledningen 52. Beroende ph 1 vilket av sina granslagen mutter. 31 befinner sig komaner vid .!stutning av tryckstramstallaren 64 den ,kontaktor att manovreras, i vars spolkrets den opaverkade granslagesstromstallaren ingar. Motorn Sr darvid sâ inkoppla:d till de tre faserna, alt rotationen kommer att s.ke 5.1 det hall, sem ger det motsatta granslaget. De hada andra granslagesstromstallarna 46 °eh 47 vilka manovreras med hansyn till andlagena hos vaxelstallarens manoverstfing 33, dvs, ancllagena hos vaxeltungorna 3, aro sa utforda att man i ett grans-lase erhaller en slutande\ och en brytande kontaktfunktion hos den paverkade stramstallaren. Den slutande kontakten Sr darvid kopplad for tandning av en signallampa 65 resp. 66 for utvisande av vaxelns lage varom indikation erhalles genom den ljuskombination, som uppstar mellan den tanda signallampan och en standigt lysande lampa 71. De hada stramstallarnas brytande .kontakter aro kopplade i serie, och derma krets är ansluten parallellt med tryckstromstallarens 64 poler. Genom denim koppling erhalles automatisk start av vaxelstallaren i vissa fall, ,som nedan skola beskrivas. In the figure, the gear stand itself is shown for the sake of simplicity only indicated by its motor 5, aisle 32, rod 33 saint organ Ufa- granslingsindikering. The mains is connected with the phase lines to 49, 50 and 51 and the ground wire to a contact 52. The phase voltages are then passed through a motor protection 53 to contacts 54, 55 and 56 respectively. 57, 58 and 59 of two contactors 60 and 60, respectively. 61. The contacts are so connected that, when switched on, by the contactor. 60 two of the night's phases are connected to the motor. in a different order than when the contactor is switched on 61. In this case, the direction of rotation of the motor will depend on the contactor which is switched on. To prevent the possibility of simultaneous switching on of the contactors, the contactor 60 has a breaking contact 62, which is connected in series with the coil winding of the contactor 61. At the same time, the contactor 61 is provided with a breaking contact 63, which is connected in series with the coil winding of the contactor 60. In the same circuit, Oro aven, as shown in the diagram, connected the spruce type stables 44 and. 45, which are operated. i .avhdngighet av nutterns 31 granslagen, dar ho.s, resp. power supply, a breaking contact function is obtained. The circuits are further connected by a pressure switch 64 connected to a voltage head, which is stored by a phase 51 and the neutral line 52. Depending on which of its branch nuts. 31 are located at the push of the pressure tensioner 64, the contactor to be maneuvered, in whose flushing circuit the unaffected spruce generator is located. The motor Sr is then connected to the three phases, or the rotation will be called 5.1 the hall, which gives the opposite branch stroke. The had two strut struts 46 ° eh 47 which are maneuvered with respect to the spirit of the gearbox maneuvering 33, i.e., the strands of the gear tongues 3, are so challenged that in a strut a closing and a breaking contact function of the affected striker is obtained. The closing contact Sr is thereby connected for ignition of a signal lamp 65 resp. 66 for indicating the position of the gear unit, the indication of which is obtained by the light combination which arises between the toothed signal lamp and a permanently illuminating lamp 71. The breaking contacts of the hated tensioners are connected in series, and this circuit is connected parallel to the poles of the pressure switch 64. Through denim coupling, automatic start of the gearbox is obtained in certain cases, as will be described below.

For att en fullstartdig vaxelomlaggning skaal ske vid endbast en mycket kort impuls !ran tryckstranastallaren 61 arc bada kontaktorer- — —3 na forsedda med sjalvhallningskretsar genom kontakter 67 reap. 68. In order for a fully-started gear shift to take place at the end, a very short impulse is applied to the pressure sensor switch 61 arc both contactors provided with self-holding circuits through contacts 67 reap. 68.

Om vaxelstallaren t. ex. genom ett stromavbrott bringats attistanna mellan sina granslagen, maste den ena kontaktorn ha en na.- got lan.gre tillslagstid an den andra vid fornyad start, for att joke hada samtidigt .skola fa en tillsla;gsimpuls, vilket kan resultera i fladdring. Derma langre tillslagstid astadkommes har av ett trogt hjalprela 69, som Sr anslutet med sin spollindning i grartslagesstrOmstallarens. 44 krets. och liar en slutande kontakt 70 inkopplad i kontaktorns 60 spolkrets. If the gearbox, e.g. due to a power outage brought to a standstill between their branches, one contactor must have a slightly longer switch-on time than the other at a renewed start, in order for the joke to have at the same time a gaining impulse, which can result in fluttering. This longer turn-on time is achieved by a faithful auxiliary relay 69, which Sr is connected with its coil winding in the grartslagesstrOmstallarens. 44 circuit. and a closing contact 70 is connected in the coil circuit of the contactor 60.

Slutligen innefattas den elektriska utrustningen av sakerhetsbrytaren: 12, vilken är anordnad att bryta str5mtillforsel till inotorn 5, .nar en vev instickes for manuell omlaggling av sparvaxeln (visas icke). Finally, the electrical equipment is comprised of the safety switch: 12, which is arranged to cut off the power supply to the motor 5, after a crank is inserted for manual rearrangement of the saving shaft (not shown).

Fig. 4 visar en schematisk vy ,av vaxelstallaren i ett normalt andlage, ett vilolage, dar den Sr redo for ,mottagande av en ny omlaggningsimpuls fran tryckstromstallaren 64. Om vaxeltungorna 3, sasora visas i fig. 5, t ex. genom ett nedfallet fOremal. 72 hindras fran att na delta lage, stannar stangen 33, under det att mutter n 31 fortsatter att skruvas in pa gangan 32. Andstoden 22 och 23 pressas da tsar av enheterna 13 och 14 .och dragfjadrarna 30 .spannas. NSr granslaget Sr natt, brytes strommen till kontaktorn 61 och motor n stannar. Genora kontaktorns 61 kontakt 68 kommer da. strom att slappas fram genom strOmstaliarna 46 och 47 a. ena .sidan och stromstallaren 44 5 andra .sidan till kontaktorn 60, som startar motorn i andra riktningen och vaxeltungorna foras ater Over till sitt fOrra lage. De faromament sona kunna uppsta genom fOrremalet 72 nedbringas Idarigenom avsevart. Fig. 4 shows a schematic view, of the gear changer in a normal condition, a resting layer, where it is ready, receiving a new rearrangement impulse from the pressure current switch 64. If the gear tongues 3, sasora are shown in Fig. 5, e.g. through a fallen form. 72 is prevented from reaching the delta bearing, the rod 33 stops, while nut n 31 continues to be screwed into the passage 32. The resistors 22 and 23 are then pressed by the units 13 and 14 and the tension springs 30 are tensioned. NSr the branch Sr night, the power to the contactor 61 is cut off and the motor n stops. Genora contactor 61 contact 68 will then come. current to be released through the current switches 46 and 47 on one side and the current generator 44 on the other side to the contactor 60, which starts the motor in the other direction and the gear tongues are passed back to its front position. The hazards which may arise through the object 72 are reduced by Idarigenom considerably.

En a,utomatisk vaxelonalaggning erhalles Sven om vaxeltungorna imed vald rubbas ur silt andlage. Delta visas i fig. 6, dar ett hjulpar 73 tillhorande ett ralsfordon pressat over vaxeltungoma 3 till. .deras motsatta andlage vid korning medfart. Darvid kommer under ett ogonblick de ba'.da stromstallarna 46 och 47 att Tura opaverkade och slappa fram strom i den krets, som Sr parallellt kopplad med tryckstromstallaren, 64. Vaxelstallare‘n startas dS automatiskt och muttern 31 skruvas in pa gangan 32, tills det motsatta granslaget Sr natt, varvid vaxeltungarna 3 komma ;att kvarligga i sin av hiulparet itvingade lage, Sven efter del att hjulparet 73 lamnat vaxeln. An a, automatic wax loon laying is obtained for Sven if the wax tongues are removed from the silt. Delta is shown in Fig. 6, where a pair of wheels 73 belonging to a rail vehicle pressed over the gear tongues 3 to. .there opposite opposites at graining entrainment. Thereby, for a moment, the two current stables 46 and 47 will turn off and release current in the circuit which is connected in parallel with the pressure current switch, 64. The gear switch is started dS automatically and the nut 31 is screwed into the passage 32, until the opposite spruce Sr night, whereby the gear tongues 3 come to remain in their position forced by the helper pair, Sven after part that the wheel pair 73 has left the gear.

I fig. 4, 5 och 6 visas tre olika belastningsfall for anordnin.gen enligt uppfinningen. Fig. 4 askadliggor ett vilolage, clar fjadrarna 30 med sin forspanning halla ihop de hada. enheterna 13 och 14. Genom att fjarma de ha' da anslagen 40 och 41 nagot fran varandra kan man emellertid fa. motorn att arbeta litet till, after det att vaxeltungorna Watt isitt andlage, varvid dessa koimana att pressas mot andlaget med en fjaderkraft, isom minst motsvarar forsp.anningen. Harigenam ernis en mycket siker anliggning av vaxeltungorn.a 3. Om de hada enheterna 13 ach 14 forskjutas i forhadlande till varandra, antingen narinas eller fjarmas frail vilalaget, erhalles i hada fallen samma belastningsfall i fjadrarna 30 i proportion till den inhordes forskjutningen. Detta framgar vid jamforelse av fig. 5, som visar enheterna fjarmade., och fig. 6, sou]: visor enheterna narmade frail vitolaget. I fig. 5 vila andstoden 22 och 23 mat andvaggarna 15, i fig. 6 .daremot stoda de emot de genom andvaggarna utskjutande rorstang.erna 16 rep. 17. I hada fallen komma allts.k andstode.n 22 och 23 att fjarmas frail varandra och astadkamma en utdragning av de i 'dam fasta dragfj adrarna 30. Figures 4, 5 and 6 show three different load cases for the device according to the invention. Fig. 4 shows a resting layer, the springs 30 with their prestress hold them together. units 13 and 14. However, by removing the abutments 40 and 41 slightly apart, one can obtain. the engine to work a little, after the gear tongues Watt in its abutment, whereby these koimana to be pressed against the abutment with a spring force, which at least corresponds to the bias voltage. Harigenam ernis a very secure abutment of the wax tongues.a 3. If the hada units 13 and 14 are displaced in relation to each other, either narinas or fjarmas frail the rest layer, in hada cases the same load drop is obtained in the springs 30 in proportion to the heard displacement. This can be seen by comparing Fig. 5, which shows the units removed, and Fig. 6, showing the units approached frail vitolaget. In Fig. 5, the duct posts 22 and 23 rest on the duck cradles 15, in Fig. 6, on the other hand, they rest against the rope rods 16 projecting through the duck loops. 17. In these cases, allstk 22 and 23 will be removed from each other and provide an extension of the traction springs 30 fixed in the dam.

Claims

Patent claim:

Gear shafts for spar shafts comprising a maneuvering device for rearrangement of the shaft tongues of the spare shaft between the two arid layers and a device for holding the gear tongues in spring abutment with spring force, comprising a pair of coaxial mutually displaceable units, one of which Sr is connected to the control device and the other Sr is connected to the gear tongues of the spar wax base and which are normally held in rage within each other, by means of the radiating units acting resilient means but directed towards the action 'of the resilient means extending axially in one or opposite direction, characterized in that S omse sides am the units' spirits aro arranged a pair of axially movably mounted resistors and that said resistor is held .. pressed against said spirits by a number of tension springs acting between the resistors.

Gear shifter according to claim 1, characterized in that each of the units consists of a duct wall with a fringe, these axially projecting passages of which the rods of one unit lie inside the stinger of the other unit and are arranged to pass through openings in the shaft. , the second unit's breathing cradle.

Gear shifter according to claim 1 or 2, characterized in that the units and the resistor are individually axially displaceably mounted on longitudinal guide rods, which units and the resistor are controlled when the units are displaced. Request publications: