TRANSMISSION FOR A DOUBLE SNAIL NEST RUDDER

The difficulty double screw-type extruding machine exists in transferring large torques to the drift pinions closely output shafts lying side by side and of the parallel running. In order to make the transmission possible of large torques, already different kinds of achievement-branching out Deppelschneckenextrudergetrieben admits and/or suggested. A become known proposal [DE-OS 1950639, Fig.4) of a kind of transmission for a double screw-type extruding machine exhibits stored output shafts, which carry transferred one drift pinion axially to each other each. Each drift pinion is surrounded thereby by three stored idler gears. The three idler gears are arranged with same division around the respective drift pinion. That has the advantage that the radial forces due to the meshings are to waive themselves mutually. The idler gears rotate on firm axles and propel the respective drift pinion at the same time. At the same time three meshings at each drift pinion are thus used for the power transmission. The idler gears are propelled for their part by one it going around internal gear, which is propelled over external teeth by a spur wheel. The internal gear muff during this arrangement likewise stored its. This become known proposal has the disadvantage that the meshings cannot evenly seßn, since the axle bases of the idler gears and the drift pinions exhibit as well as the tooth profiles themselves manufacturing tolerances. To exclude this Fertigunöstoleranzen is not, it can only at a substantially large technical expenditure be kept small. These manufacturing tolerances have however as a consequence that the radial forces due to the meshings do not waive themselves completely mutually. It comes from there to high loads of the radial camps of the Æbtriebswellen. The transmission of the partial torques on the respective drift pinion is not even due to the manufacturing tolerances. An even ramification of performance is not possible with this double screw-type extruding machine transmission. The invention is the basis the task, a transmission for a double screw-type extruding machine with two output shafts parallel in small distance, which ever drehfest connected drift pinion carries, whereby it shifts the drift pinions axially against each other is arranged and whereby each of the two drift pinions is surrounded by three idler gears combing with the respective drift pinion, those with same bending hurrying is to each other arranged and the make no secret wheel stored arranged in one coaxially to the drift pinion in the transmission case combs, to create, that a automatic attitude of the pinions for reaching an even Leistungsverzweiöung by even meshings made possible and the technical expenditure of the structure of transmission clearly reduced. According to invention this is reached by that the drift pinions and in each case two them assigned idler gears camps! OS in the housing are arranged and that the remaining third idler gear is radially adjustably in the housing stored in each case. The radially adjusting Zwisehenräder serves the centring of the respective drift pinion by its even arrangement. The radial forces of the three meshings waive themselves, since the idler gears and the respective drift pinion adjust themselves obligatorily for an even ramification of performance. For all three interference places at the drift pinion a same tooth pressure at pitch line becomes independent of the Fertigungsto [eranzen the gear wheels and the axle bases reached. Since bearings are not necessary for the drift pinion and the idler gears, a substantial manufacturing relief is given. A favourable further training of the invention can consist of the fact that with its axle pivot in one to the transmission case fastened the respective held idler gear guidance fork one keeps radially adjustable. By the invention will it for the first time possible to evenly transfer large Orehmemente with several meshings whereby it is guaranteed that each meshing transfers a same portion of the demanded drift torque. Camp damages and/or high camp expenditure for the pinions are not possible and/or necessary thus any longer. Independently of the respective manufacturing tolerances that pinion is always reached an even ramification of performance. On the basis the designs below a remark example of the invention is more near described. It shows: Fig.1 in schematic representation a double screw-type extruding machine transmission in side view and Fig.2 a plan view of the DoppelNr.363670 of screw-type extruding machine transmission in accordance with Fig.1, whereby to the representation of the second, identically constructed implemented transmission arrangement for second, axially shifted it was done without, cut after the line II-II in Fig.1, in the back-lying drift pinions. With --3 and 4-- the output shafts of the double screw-type extruding machine transmission parallel in the small distance are characteristic. The output shafts --3 and 4-- carries one drift pinion each --5--, whereby here in the designs only the front drift pinion --5-- is visible. The drift pinions --5-- are coaxial to Hohlrfidern --6 and 7-- larger diameter arranged. It becomes in the following only the front transmission arrangement for the front drift pinion --5-- and the associated internal gear --6-- described, there the transmission arrangement for here the not visible, rear lo drift pinion of the output shaft --4--, which is axially transferred, and which associated internal gear --7-- baugleieh is trained. The drift pinion --5-- on the output shaft --5--, with one of the two, here not visible, worm shafts parallel lying side by side is coupled, is in the interference with three idler gears --8, 9, 10--, of those two idler gears --9 and 10-- are ungelagert arranged. The third idler gear --8-- is over an axle pivot --19-- radially adjustably in a guidance fork --11-- one at the transmission case --12-- flanged on housing support --13-- arranged. The idler gears --8, 9, 10-- are arranged with same bending hurrying to each other and comb with the internal gear --6--, that in the transmission case --12-- in Badiallagern --14 and 15-- one keeps swivelling. The two internal gears --6 and 7-- the transmission arrangement have ever external teeth --16, 17--, those with ever a spur wheel --16q to be combed and by these propelled. In the Bela tungsfall the transmission place themselves the idler gears --8, 9, 10-- and the respective drift pinion --5-- in such a manner that the power transmission causative three meshings take place evenly. On the output shaft --3 and/or 4-- demanded drift torque is divided thus evenly on these individual meshings. This even ramification of performance makes it possible, a large torque on in small distance the lying side by side to keep parallel output shafts of two barrel extruders small too transferred and the technical expenditure of the transmission.