LOCKING THREADED CONNECTION, INCLUDING FOR GROUP CONNECTIONS Russian patent published in 2024 - IPC F16B39/36 

FIELD: machine building.

SUBSTANCE: invention relates to locking bolt-nut joints and can be used in machine building, automotive industry, construction and other industries. Locking threaded connection comprises a rod equipped with an external thread, made in the form of bolt 4 or a screw, nut 1 and conical bushing 2 having an inner surface of a cylindrical shape, which is put on the rod. A slot is made in the side wall of conical bushing 2. Inner surface of nut 1 has cylindrical part with inner thread, which is screwed with outer thread of rod in form of bolt 4, and a part with a conical seat, the cone-shaped surface of which has an angle of inclination, which provides conjugation with the outer surface of conical bushing 2. On the inner surface of conical bushing 2 in the vertical direction there are projections in the form of a gear rim, wherein conical bushing 2 is made of material with hardness exceeding that of rod in form of bolt 4. Apex angle of the conical bushing is 60–120°, wherein its outer diameter decreases in direction to fastened parts, and the base of conical bushing 2 is represented by a flat ring, on which ratchet teeth are made in the form of radial splines of a triangular profile with an inclination in the direction of screwing auxiliary nut 3.

EFFECT: maintenance of tightening force of threaded connection during operation for a long period of time.

4 cl, 1 tbl, 10 dwg