PNEUMATIC SHOCK MECHANISM Russian patent published in 2017 - IPC E21C37/22 B25D9/14 

FIELD: construction.

SUBSTANCE: shock mechanism consists of a cylindrical body with final channels, circular flange with central through hole, working tool with a shank, step hammer with a rod part, a bar with a rod part, installed in the central hole of the circular flange, permanently based in the central through hole of the step hammer, a circular chamber of a pneumatic buffer (working stroke), a sleeve of the cylindrical body with a hole for the passage of the rod part and forming on the side of the circular chamber of the pneumatic buffer (working stroke) a ring nip, restricting the travel value of the hammer, a nozzle with a channel for feeding air, fixed relatively to the cylindrical body, a circular distributing chamber in the sleeve of the cylindrical body, a network air chamber on the side of the circular flange, idle movement chamber on the side of the shank of the working tool, held by a spring against the cylindrical body. On the lateral surface of the rod part of the bar an inclined flattened channel is made with a curvature surface of higher than the second order, providing changing through passage cross-section, increasing from the full diameter size of the rod part of the bar before it ends on the face of the step hammer, installed in the central through hole.

EFFECT: reduction of local airflow resistance at the inlet, reduction of the cycle time, increase in the utilization factor of the internal energy of the air, and the cost-effectiveness of the pneumatic shock mechanism.

3 dwg