Synchronizer ring

Abstract

The invention relates to a synchroniser ring ( 1 ) for a synchronisation device ( 2 ) of a shiftable change speed gear transmission including a conical ring member ( 3 ) having an inner friction surface ( 4 ) and an outer installation surface ( 5 ) which each bound the ring member ( 3 ) in a radial peripheral direction and extend conically around an axial synchroniser ring axis ( 6 ) of the synchroniser ring at a predeterminable friction angle (α). The ring member ( 3 ) is bounded in the axial direction at a largest conical diameter (d 1 ) by a gear surface ( 7 ) with a gear ( 71 ) extending substantially perpendicular to the synchroniser ring axis ( 6 ) and is bounded at a smallest conical diameter (d 2 ) by a hub surface ( 8 ). To fix the synchroniser ring in a cylindrical hollow space ( 9 ) of a synchroniser ring hub ( 10 ), a security against rotation ( 11 ) is provided which is integrally connected to the ring member ( 3 ) and extends from the gear surface ( 7 ) of the ring body ( 3 ) in the direction toward the hub surface ( 8 ). In accordance with the invention, a guide member ( 12 ) is provided for the guidance of the installation surface ( 5 ) at an inner surface ( 91 ) of the cylindrical hollow space ( 9 ) of the synchroniser ring hub ( 10 ) at the ring member ( 3 ) in a predeterminable region between the gear surface ( 7 ) and the hub surface ( 8 ). The invention furthermore relates to a manual transmission for a vehicle having a synchroniser ring ( 1 ) in accordance with the invention.

1 . A synchroniser ring for a synchronising device ( 2 ) of a shiftable change speed gear transmission including a conical ring member ( 3 ) having an inner friction surface ( 4 ) and an outer installation surface ( 5 ) which each bound the ring member ( 3 ) in a radial peripheral direction and extend conically around an axial synchroniser ring axis ( 6 ) of the synchroniser ring at a predeterminable friction angle (□), wherein the ring member ( 3 ) is bounded in the axial direction at a largest conical diameter (d 1 ) by a gear surface ( 7 ) with gear ( 71 ) extending substantially perpendicular to the synchroniser ring axis ( 6 ) and is bounded at a smallest conical diameter (d 2 ) by a hub surface ( 8 ), and to fix the synchroniser ring in a cylindrical hollow space ( 9 ) of a synchroniser ring hub ( 10 ), a security against rotation ( 11 ) is provided which is integrally connected to the ring member ( 3 ) and extends from the gear surface ( 7 ) of the ring body ( 3 ) in the direction of the hub surface ( 8 ), characterised in that a guide member ( 12 ) is provided for the guidance of the installation surface ( 5 ) at an inner surface ( 91 ) of the cylindrical hollow space ( 9 ) of the synchroniser ring hub ( 10 ) at the ring body ( 3 ) in a predeterminable region between the gear surface ( 7 ) and the hub surface ( 8 ). 
   
   
       2 . A synchroniser ring in accordance with  claim 1 , wherein the gear surface ( 7 ) is interrupted by a cut-out ( 13 ), in particular by one, or two, or three, or more than three cut-outs ( 13 ), and/or the security against rotation ( 11 ) is connected to the ring member ( 3 ) in the cut-out ( 13 ). 
   
   
       3 . A synchroniser ring in accordance with  claim 1 , wherein just as many securities against rotation ( 11 ) are provided as cut-outs ( 13 ) in the gear surface ( 7 ), in particular precisely three securities against rotation ( 11 ). 
   
   
       4 . A synchroniser ring in accordance with  claim 1 , wherein the security against rotation ( 11 ) is configured as a security lug ( 111 ) which extends on the side of the ring member ( 3 ) remote from the synchroniser ring axis ( 6 ) substantially directed in the same way toward the installation surface ( 5 ). 
   
   
       5 . A synchroniser ring in accordance with  claim 1 , wherein the security lug ( 111 ) is a security lug ( 1110 ) having a pocket-like recess. 
   
   
       6 . A synchroniser ring in accordance with  claim 1 , wherein between two and nine guide members ( 12 ), specifically three guide members ( 12 ), particularly preferably six guide members ( 12 ) are provided, with particularly preferably in each case two guide members ( 12 ) being arranged at substantially the same interval in the peripheral direction and/or in each case two guide members ( 12 ) being arranged between two securities against rotation ( 11 ,  111 ). 
   
   
       7 . A synchroniser ring in accordance with  claim 1 , wherein the guide member ( 12 ) is configured in the form of an indentation ( 12 ) of the ring member ( 3 ) at the installation surface ( 5 ), which indentation ( 12 ) extends radially away outwardly from the synchroniser ring axis ( 6 ). 
   
   
       8 . A synchroniser ring in accordance with  claim 1 , wherein a wear reducing and/or a friction optimised friction means ( 41 ), in particular a friction coating ( 41 ), specifically a molybdenum coating ( 41 ) and/or a friction layer ( 41 ), in particular a carbon friction layer ( 41 ) and/or another friction means ( 41 ) is provided on the friction surface ( 4 ). 
   
   
       9 . A synchroniser ring in accordance with  claim 1 , wherein the synchroniser ring is a shaped sheet metal part manufactured from a deep-drawable sheet metal and/or is produced from a steel, preferably from C55, C80 or C80M steel, in particular from C35 or C45 steel. 
   
   
       10 . A manual transmission for a vehicle, in particular for a passenger car, a transporter or a truck, having a synchroniser ring ( 1 ) in accordance with  claim 1 .