| 摘要 |
FIELD: mining and construction, particularly equipment for trenchless pipeline laying in confined space under roads and other engineering structures. ^ SUBSTANCE: drilling rig comprises borer 1, hydraulic motor 2 and body 3 adapted to receive feeding device with rotator 4 and rod 5 with control keys 15, 18. Rotator 4 is provided with spindle and conical toothed gear 7. Toothed wheel 8 of the gear has cavity adapted to receive spindle 6 so that it may slide in horizontal direction. Front body 3 part has quick-release centrator 12. Borer 1 shank connected to shaft 5 passes through centrator so that it is coaxial to spindle 6. One control key, namely front one 15, is freely arranged inside body 3 and is carried by axis 16 so that is may perform angular sliding in vertical plane. Another control key 18 is of releasable type and is located on shaft 5 shank. Said control key 18 has mating end extensions 19. Feeding device drive is made as hydraulic cylinder 20 with rod 21, which may cooperate with body 3. Body 3 has guiding means 25, which may cooperate with corresponding slots of rotator. ^ EFFECT: decreased device size, simplified structure and increased operational convenience and safety. ^ 5 dwg |
