IMPROVED RELIABILITY AND VERSATILITY THREADED CONNECTION Russian patent published in 2016 - IPC F16B39/26 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to attachment assemblies. Enhanced reliability threaded connection comprises bolt (pin), on which rod nut and check nut locked by pin are screwed in, between them torsion spring with stops is installed, with bent ends inserted into nut and lock nut holes, at that is equipped with washer, installed under nut or bolt head, one or more springs, protective cap, permanent or detachable, bent ends of springs are swaged in holes or are fitted on glue, check nut can be locked by pin, spring shall meet the following condition: M_fr<M_tr<M_{sht (shp),} where M_fr - friction moment in threaded nut-bolt (pin) connection; M_tr - torque created by total installed springs at installation and operation; M_{sht (shp)} - moment on check nut, allowable for collapse (shear) of pin (locking pin), holes on the nut and check nut have chamfers on the side of springs, during assembly friction surfaces must be lubricated by grease, for retention of lubricant on nut end on the side of contact with washer grooves (channels) are made.

EFFECT: this allows to eliminate self-unfastening and destruction at vibrations and sign-variable loads.

7 cl, 4 dwg