Turnout for a track system

Abstract

A turnout for a rail vehicle track system, having a main track and branch track(s) that joins the main track. The main and branch tracks at least in regions have in each case at least two rails, wherein disposed between the sleepers and the ballast bed, on lower sides of sleepers that face the ballast bed, are in each case sleeper pads which each have at least one elastomer layer. The turnout has a turnout frog tip in which the rails of the main track pointing towards the branch track and of the branch track pointing towards the main track converge. A turnout frog region extends from the turnout frog tip in mutually opposite directions and the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region are softer than in regions of the turnout in front of and behind the turnout frog region.

1 . A turnout for a track system for rail vehicles, the track system having a main track and at least one branch track that joins the main track, wherein the main track and the branch track at least in regions have in each case at least two rails, wherein the rails are fastened on sleepers and the sleepers are mounted on a ballast bed, wherein disposed between the sleepers and the ballast bed, on lower sides of the sleepers that point towards the ballast bed, are in each case sleeper pads which have in each case at least one elastomer layer, the turnout comprising:
 a turnout frog tip in which the rails of the main track pointing towards the branch track and the rails of the branch track pointing towards the main track converge;   a turnout frog region extends from the turnout frog tip in mutually opposite directions;   the sleepers in the turnout frog region comprise inherently continuous sleepers on which the rails of the main track as well as the rails of the branch track are fastened;   wherein the turnout frog region, proceeding from the turnout frog tip, extends in the mutually opposite directions in each case at most over twenty-five successive sleepers; and   the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region are softer than the respective elastomer layers of the respective sleeper pads in regions of the turnout in front of and behind the turnout frog region.   
     
     
         2 . The turnout according to  claim 1 , wherein the turnout frog region, proceeding from the turnout frog tip, extends in the mutually opposite directions in each case at most over fifteen successive ones of the sleepers. 
     
     
         3 . The turnout according to  claim 1 , wherein the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region at a measurement frequency of 10 Hz have in each case a dynamic bedding modulus in a range from 0.088 N/mm 3  to 0.186 N/mm 3 . 
     
     
         4 . The turnout according to  claim 3 , wherein the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region at a measurement frequency of 20 Hz have in each case a dynamic bedding modulus in the range from 0.17 N/mm 3  to 0.42 N/mm 3 . 
     
     
         5 . The turnout according to  claim 4 , wherein the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region at a measurement frequency of 160 Hz have in each case a dynamic bedding modulus in the range from 0.21 N/mm 3  to 0.53 N/mm 3 . 
     
     
         6 . The turnout according to  claim 5 , wherein the respective elastomer layers of the respective sleeper pads of the sleepers in a region in front of and behind the turnout frog region at the respective measurement frequencies have in each case a dynamic bedding modulus which is higher by at least a factor of 1.25 than the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region. 
     
     
         7 . The turnout according to  claim 3 , wherein the respective elastomer layers of the respective sleeper pads of the sleepers in a region in front of and behind the turnout frog region at the measurement frequency of 10 Hz have in each case a dynamic bedding modulus which is higher by at least a factor of 1.25 than the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region. 
     
     
         8 . The turnout according to  claim 1 , wherein the respective elastomer layers of the respective sleeper pads comprise at least one of polyurethane or natural rubber. 
     
     
         9 . The turnout according to  claim 1 , wherein the respective sleeper pads, in addition to the elastomer layer, comprise at least one of a) a binding layer which points towards the sleeper, adapted for fastening the sleeper pad to the sleeper, or b) a protective layer which points towards the ballast bed. 
     
     
         10 . The turnout according to  claim 1 , wherein the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region have in a direction of a longitudinal extent of the respective sleeper in each case a central region and adjacent thereto two outer regions. 
     
     
         11 . The turnout according to  claim 10 , wherein the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region are in each case softer in the central region than in the two outer regions. 
     
     
         12 . The turnout according to  claim 1 , wherein the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region at a measurement frequency of 20 Hz have in each case a dynamic bedding modulus in the range from 0.17 N/mm 3  to 0.42 N/mm 3 . 
     
     
         13 . The turnout according to  claim 12 , wherein the respective elastomer layers of the respective sleeper pads of the sleepers in a region in front of and behind the turnout frog region at the measurement frequency of 20 Hz have in each case a dynamic bedding modulus which is higher by at least a factor of 1.25 than the respective elastomer layers of the respective sleeper pads of the sleepers ( 5 ) in the turnout frog region. 
     
     
         14 . The turnout according to  claim 1 , wherein the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region at a measurement frequency of 160 Hz have in each case a dynamic bedding modulus in the range from 0.21 N/mm 3  to 0.53 N/mm 3 . 
     
     
         15 . The turnout according to  claim 14 , wherein the respective elastomer layers of the respective sleeper pads of the sleepers in a region in front of and behind the turnout frog region at the measurement frequency of 160 Hz have in each case a dynamic bedding modulus which is higher by at least a factor of 1.25 than the respective elastomer layers of the respective sleeper pads of the sleepers in the turnout frog region.