Free-wheel switching device for use in crank continuously variable transmission mechanism to change driving direction of vehicle, has switching mechanism alternatively switching between wheels, where one wheel is arranged around other wheel
The device (20) has a free-wheel (4) for common rotation of a ring (1) and an intermediate ring (2) in a direction. Another free-wheel (5) is provided for common rotation of another ring (3) and the intermediate ring in other direction, where the directions are set opposite to each other. A switching mechanism (13) alternatively switches between the former free-wheel and the latter free-wheel. The latter free-wheel is radially arranged around the former free-wheel. A bar (11) is connected with the former ring in a torque-proof manner.