SUPPORT OF BORING ROCK DESTRUCTING TOOL (VERSIONS) Russian patent published in 2008 - IPC E21B10/22 

FIELD: mining.

SUBSTANCE: invention refers to boring tool, particularly to packing components, and can be implemented in boring bits, reamers, and calibrators. The suggested support of a cone bit includes a journal, a roller cutter, secured on the latter by means of a lock bearing, and a packing component, installed between the journal and the roller cutter. At that the support is equipped with a spring split collar, located between the journal and the packing component and has the form of a hollow half-disk in cross-section, the concave surface of which contacts the packing component. The ends of the spring collar are made in form of a rack so, that teeth of one of which mesh with slots of another, while the inside surface of the spring split collar is rubberised. According to another version of the packing unit of suggested support the spring split collar is located between the off-center executed journal track and the packing component.

EFFECT: upgraded efficiency of support and rock destructing tool on a whole.

2 cl, 5 dwg