SHOCK MECHANISM Russian patent published in 2011 - IPC E02D7/00 E21C37/00 

FIELD: construction.

SUBSTANCE: invention concerns construction equipment, namely, shock mechanisms. Such as diesel, pneumatic and hydraulic hammers. Comprises body, striker, anvil, upper and lower supports centrally arranged in body, driving shaft, drive and mechanism of striker lift in the form of two cam half-couplings adjacent to each other by means of bush and spring with the possibility of their interaction to each other. At the same time striker and upper half-coupling are arranged accordingly with conical opening and ledge, and cam half-couplings are arranged in tight chamber filled with lubricant, besides, upper half-coupling and bush are equipped with additional helical cams with the possibility of their interaction to each other. Driving shaft of striker is connected to drive by means of elastic coupling, and a spring is installed between lower support and striker. Ball support is installed in the centre of striker with the possibility of balls circulation in slots of driving shaft. Spring installed between lower support and striker is additionally equipped with alignment support that freely moves along driving shaft. Anvil is installed between upper and lower flanges joined between each other by means of guide pins and shock absorbers. Lower flange is equipped with threaded holes for fixation of replaceable working tool.

EFFECT: operation reliability increases as a result of the following: transfer of torque to shaft via ball support, stabilisation of spring with alignment support and reduction of dynamic loads at body due to shock absorbers.

2 cl, 7 dwg