FIELD: machine building.
SUBSTANCE: invention relates to rock-destroying tools, particularly, to rock-roller bit bearing structures. The bearing structure comprises a journal, a rock-roller bit, sets of large and small rollers and a set of balls making a crown bearing. The bearing structure movable part accommodates bronze sleeves with radial slots on outer cylindrical surfaces corresponding to the number of rollers in the set and varying their inner surface geometry under ambient effects, thus ensuring stable position of rollers in the bearing structure.
EFFECT: longer life of rock-roller bit bearing structure.
6 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| CONE BIT SUPPORT | 2013 |
|
RU2549631C2 |
| BORING ROLLING CUTTER BIT | 2008 |
|
RU2364699C1 |
| SUPPORT OF DRILLING CONE BIT (VERSIONS) | 2007 |
|
RU2351741C1 |
| ROCK DRILLING BIT BY GRIBENNIKOV-USHAKOVA | 2005 |
|
RU2325501C2 |
| DEMOUNTABLE CONE BIT WITH SUPPORTS OF ROLLER CUTTERS ON ROLLER BEARINGS WITH SEPARATORS AND WITH SHORTENED DEMOUNTABLE SECTIONS OF LEGS BY GRIBENNIKOV-MALINKIN | 2006 |
|
RU2347883C2 |
| DEMOUNTABLE ROCK DRILL WITH CONE ROLLERS ON BALL BEARINGS WITH CAGES | 2006 |
|
RU2333341C2 |
| DISMOUNTABLE WHEEL-TYPE DRILLING BIT WITH SHORTENED SECTIONS OF ARMS | 2007 |
|
RU2369717C2 |
| ROCK DRILLING BIT BY MALINKIN-GRIBENNIKOV | 2006 |
|
RU2325502C2 |
| ROLLING DRILLING BIT | 2011 |
|
RU2472915C1 |
| DRILLING ROLLER-BIT BEARING ASSEMBLY | 0 |
|
SU1252473A1 |
