ZEMLYAKOV LOCKING BOLT USED FOR THROUGH THREADED HOLE Russian patent published in 2009 - IPC F16B39/04 F16B39/10 F16B41/00 

FIELD: engineering industry.

SUBSTANCE: invention refers to engineering industry. Locking bolt is made of the main standard bolt. Main hole is made along the main bolt axis in its head and in its threaded body, and additional hole of smaller diameter is made in the face end of its threaded body. Main hole is equipped with metric thread whereon there screwed is expansion bolt having a hexagonal head and a body with metric thread, and face end of expansion bolt body is taper. Through radial slots are made along the threaded body of the main bolt on face end thereof along the axis. Spring washer is installed under expansion bolt head and held down to flat surface of the main bolt head. For taper end face of expansion bolt there provided is a stop against transition edge of the additional hole in threaded body of the main bolt, thus ensuring release of sector segments of the main threaded body, which are formed by its slots. Expansion bolt head flats are covered with hexagonal hole flats of washer with many flats; one side of that washer is held down to flat end surface of hexagonal head of the main bolt. Diameter size between interfacial angles of washer with many flats and diameter size between interfacial angles of hexagonal head of the main bolt are equal. Working thickness of washer with many flats is bigger than that of spring washer. A heat shrink tube or a cap is installed above the flats of the main bolt head and flats of washer with many flats and held down tightly by means of thermal shrinkage.

EFFECT: providing locking reliability.

3 cl, 5 dwg