SUPPORT FOR CUTTER DRILL BIT Russian patent published in 2009 - IPC E21B10/22 

FIELD: mining.

SUBSTANCE: invention refers to rock destructing tool, particularly to supports of cutter drill bits containing: claw with journal made with channels for lubrication supply, roller cutter installed on journal by means of locking bearing and floating journal bearing with slots on exterior and interior surfaces conjugated between them with radial channels, and bushing with sealing element rigidly connected with roller cutter and located at journal base. The sealing element is made hollow and is located in a circular groove formed with opposite situated boring on the roller cutter and the groove on the journal. In cross section the sealing element has the shape of open trapezium from the side of a bigger base facing the journal side. The cavity of the sealing element communicates with the axial channel of the journal by means of radial channels. The slots on interior and exterior surfaces of floating bearing are of a wedge shape in cross section and are arranged chequer-wise.

EFFECT: facilitating reliable sealing of support, reduced impact loads on locking bearing, reduced wear of journal bearing and increased service life of locking and journal bearings.

3 cl, 2 dwg