Automated gear wheel gearbox has annular collar between two free wheels axially displaced to engage reverse rear gear wheel, inner teeth that engage second shaft outer teeth

摘要

The gearbox has at least two parallel shafts (3,5) with fixed wheels (17-21) coaxial to the first shaft at least indirectly that engage free wheels (7-12) axially fixed to the second shaft but able to rotate about it. An annular displacement collar between two free wheels that can be axially displaced to engage a reverse rear gear wheel has inner teeth that engage outer teeth fixed onto the second shaft and a frictional torque transfer device can be displaced by the collar.