Bicycle bracket element

Abstract

A bicycle bracket element connects a bicycle frame to a rear gearshift mechanism of a derailleur system. The bracket element includes a first portion which has a cutout for receiving a portion of a bicycle rear wheel axle and a second portion which has a mounting opening to which the rear gearshift mechanism can be secured. The bracket element is formed with a region made from plastic and a region made from metal. The region made from plastic is fixedly connected to the region made from metal.

What is claimed is: 
     
         1 . A bicycle including a frame having a rear bracket portion, a derailleur system having a chain, a sprocket set, and a rear gearshift mechanism, and a bracket element connecting an inner side of the rear bracket portion to the rear gearshift mechanism, comprising:
 a first portion of the bracket element, the first portion including a cutout in which a portion of a bicycle rear wheel axle is fixed; and   a second portion of the bracket element, the second portion including a mounting opening in which the rear gearshift mechanism is secured,   wherein the bracket element is secured or can be secured in a frictionally locking manner on the rear bracket portion.   
     
     
         2 . A bicycle according to  claim 1 , wherein the bracket element includes at least one plastic region and at least one metal region, the plastic region and the metal region being releasably connected. 
     
     
         3 . The bicycle of  claim 2 , wherein the rear bracket portion has a forward rotational stop and a rearward rotational stop, wherein the bracket element is stopped against the forward rotational stop in a first stop position, and is stopped against the rearward rotational stop in a second stop position. 
     
     
         4 . The bicycle of  claim 3 , wherein the first stop formation of the bracket element is formed by the plastic region. 
     
     
         5 . The bicycle of  claim 3 , wherein the second stop formation of the bracket element is formed by the plastic region. 
     
     
         6 . The bicycle of  claim 1 , wherein a depression in the rear bracket portion forms a mating stop formation of the forward rotational stop. 
     
     
         7 . The bicycle of  claim 1 , wherein a projection protruding from the rear bracket portion forms a mating stop formation of the forward rotational stop. 
     
     
         8 . The bicycle of  claim 1 , wherein a depression in the rear bracket portion forms a mating stop formation of the rearward rotational stop. 
     
     
         9 . The bicycle of  claim 1 , wherein a projection protruding from the rear bracket portion forms a mating stop formation of the rearward rotational stop.