Method for the production of an internal geared wheel for a planetary carrier

Abstract

A method of making a rotationally symmetric body, particularly an annulus ( 1 ) for a planet gear carrier, said annulus comprising a tooth profile ( 2 ) and/or additional elements ( 3 ), and said method being a non-cutting shaping method comprising: working the tooth profile ( 2 ) and/or the additional elements ( 3 ) into a sheet metal strip ( 4 ), cutting the strip of sheet metal ( 4 ) into desired lengths before or after working in the tooth profile ( 2 ) and/or the additional elements ( 3 ), bending round the sheet metal strip ( 4 ) to form a rotationally symmetric body and fixing the ends of the strip of sheet metal strip( 4 ) to each other.

1 . A method of making a rotationally symmetric body, particularly an annulus ( 1 ) for a planet gear carrier, said annulus comprising a tooth profile ( 2 ) and/or additional elements ( 3 ), and said method being a non-cutting shaping method comprising: working the tooth profile ( 2 ) and/or the additional elements ( 3 ) into a metal strip ( 4 ), cutting the sheet metal strip ( 4 ) into desired lengths before or after working in the tooth profile ( 2 ) and/or the additional elements ( 3 ), bending round the sheet metal strip ( 4 ) to form a rotationally symmetric body and fixing the ends of the sheet metal strip ( 4 ) to each other.  
   
   
       2 . A method according to  claim 1 , wherein the tooth profile ( 2 ) and/or the additional elements ( 3 ) are made by rolling, stamping and/or forming.  
   
   
       3 . A method according to claims  1 , wherein the rolling, stamping or forming tool is designed so that, after the bending of the sheet metal strip ( 4 ), the tooth profile ( 2 ) and/or the additional elements ( 3 ) have the desired profile shape and/or the additional elements are in the intended position.  
   
   
       4 . A method according to  claim 1 , wherein the ends of the sheet metal strip ( 4 ) are welded together.  
   
   
       5 . A method according to  claim 1  wherein mating elements are formed integrally on the ends of the sheet metal strip ( 4 ) and are inserted into each other during and/or after the bending step.  
   
   
       6 . A method according to  claim 5 , wherein the elements on the ends of the sheet metal strip ( 4 ) are made at the same time as the stamping or shaping of the sheet metal strip or when cutting the sheet metal strip into desired lengths.  
   
   
       7 . A method according to  claim 5 , wherein the elements are configured as hook-shaped and/or T-shaped projections on one end of the sheet metal strip ( 4 ) and as corresponding recesses on the other end (clinch connection).  
   
   
       8 . A method according to  claim 5  wherein the ends of the sheet metal strip ( 4 ) are welded to each other at least between the elements.  
   
   
       9 . A method according to  claim 6 , wherein the elements are configured as hook-shaped and/or T-shaped projections on one end of the sheet metal strip ( 4 ) and as corresponding recesses on the other end (clinch connection).