Structure of reverse brake for automobile transmission

In combination, an automobile transmission and a reverse brake mechanism for the automobile transmission comprising:

• a primary shaft through which engine torque is transmitted to the automobile transmission;
• a secondary shaft through which engine torque is transmitted from the automobile transmission;
• a clutch sleeve mounted for sliding movement on the primary shaft and having peripheral clutch teeth with chamfers arranged at regular separations, said clutch sleeve being fixed for rotation with the primary shaft;
• a synchronizing ring mounted for rotation on the primary shaft and having peripheral synchronizing teeth with chamfers arranged at regular separations, each of which is larger than a circumferential width of each of said peripheral clutch teeth;
• and
• brake means for braking the primary shaft, said brake means being operationally coupled to said primary shaft through said synchronizing ring while said clutch sleeve is brought into engagement with said synchronizing ring through the chamfers of said peripheral clutch teeth and said peripheral synchronizing teeth when shifting the automobile transmission to a reverse gear;
• said clutch sleeve, said synchronizing ring and said brake means together forming a synchronizing mechanism for synchronizing, in rotation, said primary shaft and said secondary shaft.