Assembly and realisation of synchronisation rings in the form of sheet metal parts shaped without cutting

A synchronizing apparatus (12) for a manual shift transmission comprising:

• a stationary, synchronizer body (13) having torsional strength and circumferentially encompassing a gear shaft,
• a movable sleeve (14) on the synchronizer body (13), slidable along the longitudinal axis of the gear shaft,
• at least one shift gear (16), rotatably placed on the gear shaft and which can be coupled to the synchronizer body (13) by the moveable sleeve (14), which gear is provided with a clutch body (17) or with a clutch gearing, and can be joined to the synchronizer body (13) by the clutch body or the clutch gearing,
• at least one friction element connected to the shift gear (16),
• and at least one outer synchronizer ring (1, 6, 10, 19) having torsional strength connected to the synchronizer body, and
• wherein the outer synchronizer ring (1, 6, 10, 19) includes a conical annular body, with a larger diameter end thereof being proximal to the shift gear (16), and a smaller diameter end thereof being proximal to the synchronizer body (13),
• which is provided on an outer surface on a side with the greater diameter with a radially outwardly directed gear ring (2),
• an inner surface designed as a friction surface (23, 24) which coacts with a friction element, and the outer synchronizer ring (1, 6, 10, 19) is a one-piece sheet metal ring formed without chip removal,
• wherein the outer synchronizer ring (1, 6, 10, 19) includes on the end with the smaller diameter a radially outwardly directed flange (3, 8) constructed in one piece with the outer synchronizer ring (1, 6, 10, 19).