REDUCER-DRIVEN TURBO-DRILL Russian patent published in 1997 - IPC

FIELD: equipment for mining industry. SUBSTANCE: this relates to hydraulically-driven buttonhole motors for drilling bore-holes. Reducer-driven turbo-drill has hollow body which in its hollow accommodates high-speed shaft with eccentric axle, low-speed shaft for drive of working tool, and set of pinions, stationary gear wheels fixed in body, and connecting member between set of pinions and working tool drive shaft. Pinions are made with tooth rims of internal meshing. High-speed shaft, working tool drive shaft and connecting member are provided with axial passages for flushing liquid. Joints between connecting member passage and passages in shafts are provided with hermetic seals. EFFECT: high efficiency. 2 dwg