Nut locking device and assembly for mounting same

Locking device comprising:

• a shaft comprising a first thread, and
• a nut and a ring to be assembled on the shaft;
• the nut comprises a first tapping capable of cooperating with the first thread of the shaft, said first thread and tapping defining a first radial clearance (J1);
• the nut further comprises a second tapping opposite the first tapping, the first and second tappings being coaxial,
• an outer surface of the ring comprising a second thread capable of interacting with the second tapping of the nut, said second thread and tapping defining a second radial clearance (J2);
• an inner surface of said ring comprises a third tapping capable of cooperating with the first thread of the shaft, said first thread and third tapping defining a third radial clearance (J3);
• characterized in that:
• the first, second and third tappings and the first and second threads have an identical and constant thread pitch (P);
• and
• each of the second (J2) and third (J3) radial clearances is greater than the first radial clearance (J1).