REVERSING PERCUSSIVE MECHANISM Russian patent published in 1995 - IPC

FIELD: mining industry and construction. SUBSTANCE: body 1 of percussive mechanism has control discharge channel 2 which together with striker 3 forms main hollow 5 and additional hollow 6 of pneumatic accumulator. Cocking chamber 11 and overflow chamber 12 are communicated with pressure discharge manifolds 9 and 10 by means of body pressure channels 7 and 8. Distributing unit of striker 3 has flexible shutoff and regulating member 13 and control hollow 14 communicated through hole 15 with bore 16 of piston 4 of striker 3. Body 1 has two control pressure channels 19 and 20. Each control pressure channel is located between control discharge channel 2 and one of pressure channels 7 and 8 and communicated with pressure discharge manifold same with respective pressure channel. Channel 2 is communicated with manifolds 9 and 10 through check valves 21 and 22. Under the pressure rising in hollow 14, flexible member 13 is deformed to close holes 15 and bores 16. Under the action of discharge pressure rising in chamber 11, striker 3, hollow 14 is communicated with manifold 9. Pressure in hollow 14 drops, and flexible member 13 expands. Liquid from body 1 enters chamber 12 through holes 15 and bore 16. Under the effect of compressed air in hollow 5, striker 3 executing working stroke strikes body 1 on the side of worked face. EFFECT: simplified design and control of mechanism due to reduced number of control members. 1 dwg