SUPPORT OF CONE-ROCK BIT AND MOUNTING METHODS (OPTIONS) Russian patent published in 2008 - IPC E21B10/22 

FIELD: mining.

SUBSTANCE: invention relates to the rock-destroying device of mainly small diameter, particularly to the support of rolling cone-rock bits, and to mounting methods. The invention increases the service durability of the support and simplifies the mounting. The support consists in a leg with the inclined spindle, rolling cutter with the circular boring and locking mount made as the bushings installed into the spindle's bores so as to interact with the walls of the circular boring rolling cutter. The spindle bores intended for the rods of the locking mount go in parallel or at an angle to each other and symmetrically to the spindle's axis. When the bores are placed at an angle to each other, the angle's vertex is located at the upper part of the spindle. The rods are installed via the same rolling cutter's bore which is overlapped with one of the spindle's bore, after that, the rolling cutter's bore is overlapped with the next spindle's bore and another rod is installed, and after the last rod is installed, all rods are rigidly mounted regarding the spindle in position where their butt surfaces do not contact with the circular boring of the rolling cutter and the rolling cutter's bore is sealed.

EFFECT: working durability of support of cone rock drilling bit is increased while mounting is simplified.

8 cl, 5 dwg