Patent ID: 8839688

Claim:
A switchable freewheel arrangement for a crank CVT transmission of a motor vehicle, said freewheel arrangement comprising: cylindrical clamping bodies held in a cage and disposed between an outer ring and an inner ring, whereby each clamping body can be pressed with a relatively high contact force against the inner ring by an energy accumulator, whereby the clamping body is operable through a switching mechanism in a release direction and in a clamping direction of the freewheel arrangement, wherein the energy accumulator is configured so that by means of a small torque, it generates a relatively small set-up force for setting up the clamping body, and wherein the energy accumulator includes two torsion springs having a plurality of coaxial coils, and wherein the torsion springs are disposed on respective radially opposed, axially extending sides of a clamping body, wherein the clamping body is cylindrical and includes a central axis and external cutouts defined by respective concave arcs and that have respective axes that extend parallel to the clamping body central axis and are positioned radially opposite each other relative to the clamping body central axis, wherein in each radially opposed cutout a torsion spring is disposed having a central longitudinal axis and a laterally-outwardly-extending leg at each longitudinal end of the clamping body, the torsion springs for each clamping body including respective radially inner coil springs relative to the clamping body central axis and respective radially outer coil springs relative to the clamping body central axis, wherein the legs at the longitudinal ends of the torsion springs extend substantially perpendicularly to the spring central axis from opposite ends of the torsion springs, and wherein respective bent outer end sections of the laterally-outwardly-extending legs of the torsion springs are disposed in respective elongated holes provided in respective spaced, annular, coaxially positioned wall parts that extend in the circumferential direction to define the cage holding the clamping bodies, wherein each spring generates a set-up force through a relatively large lever arm provided by the longitudinal ends of the torsion springs and extending at respective outer ends of each of the springs, whereby torque magnitudes generated by the set-up forces of the torsion springs act in respective opposite directions, so that a resulting torque difference for setting up the clamping bodies is relatively small.