Ratchet type clutch device and vehicle drive device

A ratchet type clutch device comprising:

• an outer ring and an inner ring that are relatively rotatable, the inner ring having tooth portions and grooves that are alternately formed on an outer peripheral surface thereof in a circumferential direction, wherein
• the outer ring includes:
• a plurality of first claw members that enters into the respective grooves and engages with the respective tooth portions from a first rotation direction;
• and
• a plurality of second claw members that enters into the respective grooves and engages with the respective tooth portions from a second rotation direction,
• the inner ring includes:
• an inner ring main body in which the tooth portions and the grooves are formed;
• a shutter plate that is arranged coaxially with the inner ring main body and is rotatable relative to the inner ring main body;
• and
• an elastic member that biases the shutter plate in a rotation direction,
• the shutter plate has a plurality of restriction tooth portions that is arranged at equal intervals with the tooth portions and is formed on an outer peripheral surface thereof,
• a direction parallel to a rotation axis of the outer ring is set as an axial direction,
• a state in which the restriction tooth portions are misaligned in the first rotation direction with respect to the tooth portions and overlap with a part of the grooves when viewed from the axial direction is set as a closed state of the shutter plate,
• a state in which all of the restriction tooth portions overlap with the tooth portions when viewed from the axial direction is set as an open state of the shutter plate,
• the elastic member biases the shutter plate to switch the state from the open state to the closed state,
• each of the first claw members is formed to be able to enter into the corresponding groove in the closed state, and
• each of the second claw members is formed to be able to enter into the corresponding groove in the open state, a center of gravity is arranged closer to a tip portion than a rotation center of the corresponding second claw member, and the second claw members are released from the respective grooves when a centrifugal force of a predetermined value or more acts.