Synchronizing device for transmission assemblies and having friction-coupled assemblies

Synchronizing device for transmission assemblies, comprising:

• a gear shaft having a detent mounted thereon in a twist-proof manner;
• a sliding sleeve and at least one speed wheel rotatable on said gear shaft to be interconnected in a twist-proof manner with said detent by movement of said sliding sleeve;
• a clutch connected in a shape-locking manner to said at least one speed wheel;
• a friction ring body assembly comprising a friction ring including a conically-shaped coupling surface having a sintered-on friction lining and cams for providing engageable and disengageable friction coupling of said clutch with said detent by engagement of said cams with said clutch, said friction ring body assembly further comprising at least one synchronizing ring engageable with said sliding sleeve and including a conically-shaped coupling surface engageable with said friction lining with movement of said sliding sleeve, and wherein said clutch or the speed wheel includes a frictionless surface and recesses for the coupling connection with said detent and the shape-locking accomodation of said cams of said friction ring body assembly.