Transmission belt and associated transmission system

Abstract

A transmission belt his provided which has a first elastomeric material, a plurality of longitudinal inserts comprising a first material, a working surface covered by a covering including a second material, and an opposite surface to said working surface. At least one of the first material and the second material is a fibrous metallic material. Advantageously, the transmission belt is a toothed belt.

1 . A transmission belt comprising a body including a first elastomeric material, a plurality of longitudinal inserts comprising a first material, a working surface covered by a covering comprising a second material, and an opposite surface to said working surface, wherein at least one of said first material and said second material is a fibrous metallic material comprising fibres with a diameter of between 2 and 40 μm. 
     
     
         2 . A transmission belt according to  claim 1 , wherein said fibrous metallic material comprises fibres with a diameter of between 5 and 15 μm. 
     
     
         3 . A transmission belt according to  claim 1 , wherein said fibrous metallic material is steel. 
     
     
         4 . A transmission belt according to  claim 1 , wherein the second material is chosen from the group constituted by woven fabric, knitted fabric and non-woven fabric. 
     
     
         5 . A transmission belt according to  claim 4 , wherein said second material is a fabric. 
     
     
         6 . A transmission belt according to  claim 4 , wherein said fibrous metallic material has a weight of between 500 and 1500 g/m 2 . 
     
     
         7 . A transmission belt according to  claim 4 , wherein said fabric comprises yarns that extend in the longitudinal direction and include said fibrous metallic material. 
     
     
         8 . A transmission belt according to  claim 7 , wherein said yarns comprise at least one elastic yarn around which at least one yarn comprising said second material is wound. 
     
     
         9 . A transmission belt according to  claim 7 , wherein said fabric comprises both longitudinal yarns and transverse yarns including said fibrous metallic material. 
     
     
         10 . A transmission belt according to  claim 1 , wherein said first material is a fibrous metallic material based on fibres having a diameter of between 2 and 40 μm. 
     
     
         11 . A transmission belt according to  claim 1 , wherein said inserts are formed by a plurality of yarns and each yarn is formed by a plurality of filaments. 
     
     
         12 . A transmission belt according to  claim 1 , wherein each one of said inserts comprises between 3 and 20 yarns. 
     
     
         13 . A transmission belt according to  claim 11 , wherein each one of said yarns comprises between 50 and 500 filaments. 
     
     
         14 . A transmission belt according to  claim 11 , wherein said inserts also comprise a second fibrous material. 
     
     
         15 . A transmission belt according to  claim 1 , wherein it is a toothed belt. 
     
     
         16 . (canceled) 
     
     
         17 . A transmission system comprising:
 a transmission belt according to  claim 1 .   
     
     
         18 . A transmission system for a motor vehicle comprising;
 at least one drive pulley,   a driven pulley,   a transmission belt and   means for maintaining said belt in direct contact with oil or partially immersed in oil,   wherein said transmission belt comprises:
 a body including a first elastomeric material, 
 a plurality of longitudinal inserts including a first material, 
 a working surface covered by a covering including a second material, and 
 an opposite surface to said working surface, 
 wherein at least one of said first material and said second material is a fibrous metallic material comprising fibres with a diameter of between 2 and 40 μm. 
   
     
     
         19 . The transmission system of  claim 17 , wherein said transmission belt is at least partially in an oil bath or continuously in contact with oil.