CONE BIT SUPPORT Russian patent published in 2012 - IPC E21B10/22 

FIELD: mining.

SUBSTANCE: sliding bearing is made as a bushing with rolling elements. The feature of the proposed support is in the fact that a journal of larger diameter is made with a circular bore for a bushing tail, which is installed on the journal with the possibility of cranking and made with longitudinal slots for rolling elements installed into them as capable of cranking and aflush with external surface of the bushing. Rolling elements are made as rollers. The support is equipped with a ball race placed between the end of the bushing tail and the bottom of the circular bore for it in the journal of the larger diameter.

EFFECT: simplified design, reduced specific loads at a sliding bearing and increased service life of the bearing and the support in general.

3 cl, 2 dwg