| 摘要 |
FIELD: mining. ^ SUBSTANCE: in structure of fastener assembly of drilling device, containing casing, fixed in casing bearing box and semi-rings, according to the invention semi-rings are fixed by fixer on bearing box with ability of radial motion and they are constricted by flexible ring, and at internal side of casing it is implemented annular rebore. ^ EFFECT: fast and easy changing of crown bit at any wear, and ability of manufacturing of it without full disassembly of fastener assembly of drilling device. ^ 2 cl, 1 dwg |
