SUPPORT OF DRILLING CONE BIT Russian patent published in 2009 - IPC E21B10/22 

FIELD: mining.

SUBSTANCE: invention refers to rock destroying tool, particularly to supports of drilling cone bits of smaller diameter. The support of the drilling cone bit contains a claw with a tilted journal and a roller cutter installed therein by means of two journal bearings and locking ball bearing placed between the two journal bearings. Support surfaces S₁ and S₂ of the journal bearings located on both sides of the locking ball bearing are connected by ratio S₁/S₂=0.9-1.1. Such design of the support facilitates uniform loading of the journal bearings, also reduces probability of wedging of the locking bearing and essentially increases efficiency of the support and the drilling bit as a whole.

EFFECT: facilitating uniform loading of journal bearings, also reducing probability of wedging of locking bearing and essentially increasing efficiency of support and drilling bit as a whole.

2 dwg