LOCKING THREADED CONNECTION Russian patent published in 2025 - IPC F16B39/12 F16B39/282 

FIELD: devices for fastening or securing.

SUBSTANCE: invention relates to fasteners excluding spontaneous unscrewing of a nut, and can be used in power and power machines and plants of automotive, aviation, machine building, railway and other industries, experiencing vibration, impact loads and thermal effects. Locking threaded connection comprises a rod with a threaded part, the end of which is made with a cylindrical cavity with diameter of 0.65-0.7 of the diameter of the threaded part, and slots with a depth not exceeding the length of the threaded part by 1.5-2.0 of the thread pitch, main elongated nut and lock nut with conical element interacting with end of threaded rod with provision of its elastic or plastic expansion. End of the threaded rod is placed inside the main elongated nut, which is made with holes along the faces and an annular groove located on the side of the threaded hole at a distance from the lower edge equal to the height of the standard low nut of normal accuracy for a given diameter of the threaded rod, and a width exceeding the length of the end of the threaded part, wherein the holes are interconnected with the annular groove, and the lock nut is made in the form of a bolt, the conical element of which interacts with the end of the threaded rod at the location of the annular groove.

EFFECT: ability to simplify the design and process of locking a threaded connection by using standard fasteners and tools (wrench) of the same size while ensuring reliable fixation of the main nut from self-unscrewing by creating elastic or plastic deformations of the threaded rod when interacting with the lock nut.

2 cl, 4 dwg