HYDRAULIC PERCUSSIVE GEAR Russian patent published in 2003 - IPC

FIELD: mining industry, civil and mechanical engineering. SUBSTANCE: invention deals with crushing of rocks, frozen ground, snow and ice formations. Hydraulic percussive gear includes percussive mechanism which body houses piston-flat die dividing space of body into working space and back stroke space constantly communicating with pressure line and control unit in which case main and additional flow separators with main and additional shutoff-controlling members are installed in symmetry. Body of percussive mechanism is provided with additional control channel constantly connected to pressure line which is placed above control channel of main shutoff-controlling member. Additional control groove is cut in upper part of piston-flat die through which control space of main shutoff-controlling member is periodically connected to pressure line via control channel of main shutoff- controlling member and additional control channel at end of working stroke and is disconnected at period of idle stroke of piston-flat die. EFFECT: raised frequency of strokes, enhanced operational efficiency of hydraulic percussive gear. 2 dwg