SE176103C1

SE176103C1 -

Info

Publication number: SE176103C1
Authority: SE
Publication date: 1961-01-01

Description

Uppfinnare: H J Sehwerdhbfer Prioritet begiird iron den januari 1957 (FOrbundsrepubliken Tyskland) Vid forut kanda vaxelnav for fordon anviindas planetvaxlar, Yid vilka planethjulen aro anordnade regelbundet pa planethjulsbararens delningscirkel. Planethjulens lagertappar ,anvandas vanligen samtidigt sasom anslagstappar for medbringaren. Den symmetriska delningen pa delningscirkeln är vid de fOrut Hilda vaxelnaven erforderlig pa grund av den ofta •anvanda fyrarmade medbringa- ren for att erhallalika avstand fordelade anslag. For ,att kunna montera dessa planet-hint pa lagertapparna, maste det villkoret vara uppfyllt, att summan av tandernas antal pa solhjulet och ringhjulet skall vara jamt delbar med antalet anvanda planethjul. For Mitre lagring av det vanligen icke noggrant styrda ringhjulet och for fordelning av periferikraften ha vid naykon.struktioner am/tits planetvaxlar med tee men vanligen fyra planethjul. Inventor: H J Sehwerdhbfer Priority begiird iron den January 1957 (Federal Republic of Germany) In the prior art gear hubs for vehicles, planetary gears are used, in which the planet gears are arranged regularly on the planetary gear carrier pitch circle. Planetary wheel bearing pins are usually used at the same time as stop pins for the carrier. The symmetrical division of the dividing circle is required at the front Hilda gear hubs due to the frequently used four-arm carrier in order to obtain spaced distributions. In order to be able to mount these planetary hints on the bearing pins, the condition must be fulfilled that the sum of the number of teeth on the sun gear and the ring wheel must be equally divisible by the number of planet wheels used. For miter storage of the usually not accurately controlled ring gear and for distribution of the peripheral force, nay constructions have / have planetary shafts with tee but usually four planet wheels.

FOr dessa vaxlar fir villkoret, att summsn av tandernas antal pa solhjulet och ringhjulet skall vara jamt delbar med 3 eller 4. Av konstruktiva och ekonomiska skal gores yid cykelnav solhjulet pa axeln sa filet som m8jligt.. Skola sadana vaxlars utvaxlingsforhallanden andras nagot yid hopsattningen, sa är delta lake utan vidare mojligt, eftersom pa ringhjulet alltid tandsprang med Ire eller fyra tander och vid storre utvaxlingsforandringar med sex eller atta tander maste anvandas for att uppfylla monteringsvillkoren. Tandtalsandringar med tee eller fyra resp. sex eller atta tander innebara emellertid stora utvaxlingssprang och dessutom en vasentlig forandring av ringhjulets diameter oak foljaktligen aven av dimensionerna hos navhylsan och alla andra navdelar. Dessa vaxlar ha alltsa den nackdelen, att sma utvaxlingsandringar ej aro mojliga. Detta har till fOljd, att eftersom vaxelanordningen maste anbringas det utrymme, som star till forfogande f6r ett cykelnav, navhylsans diameter.maste hallas stor. De ovan namnda nackdelarna markas for cyklisten, eftersom denne icke yid varje tillfalle kan erhalla den for honom individuella utvaxlingen och eftersom vid en &fling av navhylsans diameter navels vikt genast okar. For these gears, the condition is that the sum of the number of teeth on the sun gear and the ring wheel must be equally divisible by 3 or 4. Of constructive and economical shells, the bicycle wheel on the shaft on the shaft is made as filetable as possible. so delta lake is easily possible, because on the ring wheel always gears with Ire or four teeth and in the case of larger gear changes with six or eight teeth must be used to meet the mounting conditions. Teeth changes with tee or four resp. six or eight teeth, however, meant large gear gaps and in addition a substantial change in the diameter of the ring wheel and consequently also in the dimensions of the hub sleeve and all other hub parts. These gears therefore have the disadvantage that small gear changes are not possible. This has the consequence that since the gear device must be fitted with the space available for a bicycle hub, the diameter of the hub sleeve must be kept large. The above-mentioned disadvantages are highlighted for the cyclist, since he cannot in each case obtain the individual gear ratio for him and because with a change in the diameter of the hub sleeve, the weight of the navel immediately increases.

De ovan angivna naekdelarna ha eliminerats vid foremalet for foreliggande uppfinning. Lagertapparna aro sã anordnade, att de ligga parvis mitt emot varandra, varvid emellertid delningen till det andra paret icke iir ratvinklig utan forskjuten en viss vinkel. Harigenom är det mojligt att montera fyra planethjul, om endast suEaman av tandernas antal pa solhjulet och ringhjulet är delbar med tya. Vaxeln aterfores alltsa teoretiskt till en vaxel med endast tva planethjul. Darigenom att summan endast behoyer vara delbar med tvâ och ej med fyra, kan ett dubbelt sa stort antal grundutvaxlingar valjas som vid de forut kanda vaxelnayen. Dessutom är det m8jligt att bygga vaxelnav med tvaarmade medbringare med mindre diameter an tidigare. Vidare kan genom att tandspranget är litet (tva tander) en grundkonstruktion av ett nay astadkommas i vilken utvaxlingsforhallandet kan varieras mom vissa granser enligt ett byggladesystem genom utbyte av endast fa delar (planethjul, planethjulsbarare och ringhj ul) Vid uppfinningsforemalet, i vilket planethjulens lagertappar samtidigt utgora drivtapparna och vid vilken en tvaarmad medbringare anvandes, maste foljande villkor vara uppfyllda: Lagertapparna maste vara anordnade parvis mitt emot varandra. The above parts have been eliminated in the object of the present invention. The bearing pins are arranged so that they lie in pairs opposite each other, however, the pitch to the other pair is not at right angles but offset a certain angle. This makes it possible to mount four planet gears, if only the sum of the number of teeth on the sun gear and the ring gear is divisible by tya. The gear is thus theoretically returned to a gear with only two planet wheels. Because the sum only needs to be divisible by two and not by four, a twice as large number of basic gear ratios can be chosen as in the previously known gear ratios. In addition, it is possible to build a gear hub with two-armed carriers with a smaller diameter than before. Furthermore, because the tooth gap is small (two teeth), a basic construction of a nay can be achieved in which the gear ratio can be varied with certain boundaries according to a building system by replacing only a few parts (planet gears, planet wheel carriers and ring wheels). constitute the drive pins and in which a two-armed carrier was used, the following conditions must be met: The bearing pins must be arranged in pairs opposite each other.

Forskjutningsvinkeln niaSte vara sa lagd, att planethjulen kunna monteras. 2— — 3. Summan av tandernas antal pa solhjulet och ringhjulet maste vara jamt delbara med tva. The displacement angle niaSte be so laid that the planet gears can be mounted. 2— - 3. The sum of the number of teeth on the sun wheel and the ring wheel must be equally divisible by two.

En utforingsform av uppfinningen skall narmare beskrivas nedan med hanvisning till de bifogade ritningarna. An embodiment of the invention will be described in more detail below with reference to the accompanying drawings.

Fig. 1 visar en langdsektion av ett vaxelnay med tre -vaxlar. Fig. 1 shows a longitudinal section of a gear nay with three shafts.

Fig. 2 visar ett tvarsnitt av navet efter lin- j eni fig. 1. Fig. 2 shows a cross section of the hub along the line in Fig. 1.

Fig. 3 -visar ett tvarsnitt av navet efter lin- jeni fig. 1. Fig. 3 shows a cross section of the hub along the line in Fig. 1.

Vid den i fig. 1 visade utfOringsformen sker drivningen fran kedjehjulet 1 Over drivorganet 2 till medbringaren 3, vilken ãr anordnad pa axeln 4 och genom forskjutbara delar 5 och 6 fOrskjutes for inkoppling av vaxlarna. Medbringaren 3 overfOr med sina hada ansatser 7 vridmomentet till tapparna 8, pa vilka planethjulen 9 aro lagrade. Fran planethjulen 9 sker drivningen Over den stora hylsan 10, vilken är forsedd med en invandig kuggkrans, och sparrarna 11 till nayhylsan 12. In the embodiment shown in Fig. 1, the drive takes place from the sprocket 1 over the drive means 2 to the carrier 3, which is arranged on the shaft 4 and is displaced by displaceable parts 5 and 6 for coupling the gears. The carrier 3 transmits the torque to the pins 8, on which the planet gears 9 are mounted, with their hatched attachments 7. From the planet gears 9, the drive takes place over the large sleeve 10, which is provided with an internal gear ring, and the rafters 11 to the nay sleeve 12.

Enligt uppfinningen aro de fyra planethju len 9 icke likformigt fordelade ph delningscirkeln 13, utan de hada ph den vagrata axeln 14 liggande planethjulen 9 aro i foriallande till de pa den lodrata axeln 15 liggande pIanethjulen 9 forskjutna en vinkel a. Genom denim forskjutning erhallas de ovan angiyna fordelarna. According to the invention, the four planet gears 9 are not uniformly distributed in the dividing circle 13, but the planet gears 9 lying on the horizontal axis 14 are offset by an angle a in relation to the plane gears 9 lying on the vertical axis 15. By denim displacement they are obtained above angiyna benefits.

Claims

Patent claim:

Gear hub with a planetary gear for bicycles and motorcycles, characterized in that the planet gears (9) are not regularly distributed on the dividing circle (13), however, always two wheels are opposite each other and the sum of the number of teeth on the sun wheel and ring wheel is divisible by two, and that the carrier (3) is provided with two coupling arms.

Gear hub according to claim 1, characterized in that the bearing pins (8) of the planet gears (9) simultaneously form the drive pins. Cited publications: