SYNCHRONISATION DEVICE FOR A GEAR BOX
The invention relates to a synchronisation device (12) for a gear box (10), comprising a hub (14) which is associated with a transmission shaft (16), a sliding sleeve (18) which is arranged in a rotationally fixed manner on the hub (14), but limited with respect to displacement on the hub (14) in the axial direction (20) of the transmission shaft (16), a gear-wheel sided selector tooth (30) to which the sliding sleeve can be coupled (18), and a synchronisation assembly (22) comprising a locking ring (24) and a friction ring (26). Said locking ring (24) has inclined surfaces (40) which can interact with contact surfaces (42) on the friction ring (26) in such a manner that by increasing the connection force (F) exerted by the sliding sleeve (18) in the axial direction (20), an axial pressure force (FVerstärkung) of the friction ring (26) counter to a friction surface (44) which is coupped to a gearwheel (28) of the gear box (10) is produced.