HYDRAULIC PERCUSSIVE MECHANISM Russian patent published in 1999 - IPC

FIELD: percussive mechanisms applicable in machines for working of rocks, frozen grounds in mining and construction industries. SUBSTANCE: hydraulic percussive mechanism includes body with gas energy accumulator, cocking chamber accommodating striker with head and rod, and stepped valve pressed by flexible energy accumulator. Striker has supports on body which are located on both sides of head which in striker motion to perform percussive forms slot throttle together with body in lower part of cocking chamber. Outer surface of valve and inner surface of body form overflowing cavity which is periodically communicated with cocking chamber through channels and cavity located above valve. Overflowing cavity is constantly communicated with return main line. Valve is mounted in body for periodic closing of return main line to cutoff upper part of overflowing cavity and to transform it into pressure cavity which is connected through channels with cavity located under valve. Cocking chamber is constantly connected with pressure main line. Striker rod is hollow. EFFECT: increased reliability of mechanism operation. 2 cl, 1 dwg