Constant velocity universal joint

A constant velocity universal joint comprising:

• an outer joint member;
• an inner joint member that transmits torque with the outer joint member while allowing angular displacement via a torque transmitting member;
• a power transmission shaft connected to the inner joint member in a torque transmittable manner;
• and
• a detachable mechanism provided between the inner joint member and the power transmission shaft so as to detach the power transmission shaft from the inner joint member, wherein
• the detachable mechanism includes a cylindrical member externally fit onto the power transmission shaft, a fixing member accommodated to be movable in a radial direction in the cylindrical member, and an annular member disposed to be movable in an axial direction on an outer periphery of the cylindrical member,
• a locking claw is provided at an end of an inner joint member side of the annular member, and a locking groove is provided at an end of an annular member side of the inner joint member, and the locking claw of the annular member is fitted into the locking groove of the inner joint member,
• the annular member is provided with a portion that restrains radially outward movement of the fixing member and a portion that permits the radially outward movement of the fixing member,
• a state in which the radially outward movement of the fixing member is restrained and a state in which the radially outward movement of the fixing member is permitted are switched by axial movement of the annular member, and
• when the radially outward movement of the fixing member is restrained by the annular member, the fixing member is engaged with the power transmission shaft.