HYDRAULIC PERCUSSION DEVICE Russian patent published in 2004 - IPC

FIELD: mechanical engineering, design of hydraulic percussion devices. SUBSTANCE: technical objective of invention lies in control over operational parameters of hydraulic percussion machine ( strokes of striker, energy of single impact, frequency of impacts ) in wide range. There is developed device to adjust operational parameters of hydraulic percussion machine by change of value of return motion of striker. Stepless adjustment is carried out in wide range by change of effort of preliminary compression of opening and closing springy members, individually or both at same time, by simultaneous increase or decrease of their compression by same linear value while preserving relations ensuring serviceability of percussion machine. EFFECT: increased efficiency of hydraulic percussion device under particular ground conditions. 5 dwg