Double clutch assembly

A double clutch assembly comprising:

• a cover casing installed to receive a driving force from outside and to rotate;
• a diaphragm spring installed to be retractable in an axial direction with respect to the cover casing;
• a center plate coupled to the cover casing;
• an auxiliary cover casing coupled to the center plate and to form a supporting point of the diaphragm spring;
• a pressure plate coupled to the cover casing;
• an auxiliary pressure plate coupled to the center plate;
• an auxiliary diaphragm spring installed between the auxiliary cover casing and the auxiliary pressure plate;
• a disk assembly installed between the center plate and the pressure plate;
• an auxiliary disk assembly installed between the center plate and the auxiliary pressure plate;
• and
• a position restriction structure fixed to the auxiliary cover casing and to restrict a movement in a radial direction and a rotation direction of the diaphragm spring,
• wherein the position restriction structure is disposed in a space between the auxiliary cover casing and the diaphragm spring, and
• the position restriction structure includes a body part fixed to the auxiliary cover casing, a mounting part extending in a circumferential direction from the body part and coupled to the auxiliary cover casing, a first protrusion protruding in the axial direction from the body part toward an incision groove of the diaphragm spring and inserted into the incision groove to restrict movement in the radial direction and a second protrusion protruding in the axial direction from the body part toward the incision groove of the diaphragm spring and inserted into the incision groove to restrict movement in the rotational direction,
• wherein the second protrusion is located inside from the first protrusion in the radial direction, and
• wherein the second protrusion includes a first bent part bent so as to protrude in the axial direction from the central portion of the body part and a second bent part bent so as to protrude outward from both ends of the first bent part in the radial direction and making surface contact with each of both inner peripheral surfaces of the incision groove of the diaphragm spring in the circumferential direction.