Cam clutch

A cam clutch comprising:

• an inner ring and an outer ring that are coaxially provided such that the inner ring and the outer ring are relatively rotatable;
• a fixed cage that includes pocket portions aligned at predetermined intervals in a circumferential direction and is fixed to the inner ring or the outer ring;
• a movable cage that includes pocket portions aligned at predetermined intervals in the circumferential direction and is disposed to be relatively rotatable with respect to the fixed cage;
• a plurality of cams that are arranged in the circumferential direction between the inner ring and the outer ring by being held by the fixed cage and the movable cage and are configured to be able to be engaged with the inner ring and the outer ring irrespective of the cams leaning in either of a forward or backward direction with respect to a neutral posture in which the cams are not in contact with one of or both the inner ring and the outer ring;
• and
• a biasing means for biasing the plurality of cams into the neutral posture or an inclined posture in which the cams are brought into contact with the inner ring and the outer ring,
• wherein the movable cage is axially movably provided,
• one of the fixed cage and the movable cage is provided with guide groove portions such that the guide grooves extend in an axis direction, the other one of the fixed cage and the movable cage is provided with pin members such that the pin members move along the guide groove portions with movement of the movable cage in the axis direction, and
• each of the guide groove portions includes a phase regulating portion that is configured to be able to hold the movable cage in a state where the pocket portions of the movable cage are in the same phase as a phase of the pocket portions of the fixed cage, a first phase change allowing portion that is configured to be able to hold the movable cage in a state where the movable cage is movable within a predetermined range in one of the forward and backward directions with respect to the fixed cage, and a second phase change allowing portion that is configured to be able to hold the movable cage in a state where the movable cage is movable within a predetermined range in both the forward and backward directions with respect to the fixed cage.