A clamping mechanism having a static plate and a dynamic plate rotatable about a transverse axis relative to the static plate is disclosed. The static plate defines a plurality of static lifting ramps, and the dynamic plate defines a plurality of dynamic lifting ramps opposing the static lifting ramps. A roller is disposed between each opposing pair of the static lifting ramps and dynamic lifting ramps. The rollers move between a raised position and a recessed position in response to rotation of the dynamic plate relative to the static plate between a lock position and a release position. The lifting ramps are arranged in a spiral configuration relative to each other, with the dynamic lifting ramps substantially transverse to the static lifting ramps to force radial movement of the rollers relative to the transverse axis during rotational movement of the dynamic plate relative to the static plate.