PNEUMATIC HAMMER Russian patent published in 2023 - IPC B25D9/04 E21C37/24 

FIELD: pneumatic impact machines.

SUBSTANCE: invention relates to pneumatic impact machines and can be used in construction, mining and mechanical engineering. The pneumatic hammer contains a cylindrical body, a working tool held relative to the cylindrical body, a handle with an air inlet device, a partition with an inlet throttle, an outlet channel and an axial hole in which a tube with a longitudinal outlet channel and a radial outlet channel extending into its side is installed and fixed. surfaces, an annular outlet chamber with an outlet formed by a partition, a cylindrical body and a handle body, an antechamber formed by a handle body and a partition and communicated through an air supply channel with a compressed air network, a striker with a through axial channel for passing the said tube, dividing the cavity of the cylindrical body into a working stroke chamber on the side of the partition, constantly communicated with the pre-chamber by means of an inlet throttle in the partition, and an idle chamber on the side of the working tool, periodically communicated by means of radial and longitudinal exhaust channels in the tube and the outlet channel in the partition with access to the annular outlet chamber and through the outlet hole in the handle body into the atmospheric chamber formed by the handle body and the air baffle ring, a recess in the cylindrical body from the side of the idle chamber, as well as a bypass screw channel-groove with permanently open outlets to the idle chamber and the working stroke chamber. At the same time, the bypass screw channel-groove is made on the side surface of the inner cavity of the channel of the cylindrical body in the form of a drainage screw channel-groove with a cross section in the form of an isosceles trapezoid with constant communication between the working stroke chamber and the idle chamber.

EFFECT: reduction in air consumption from the network, increase in impact energy transmitted to the working tool, as well as increase in the resource of the pneumatic hammer.

1 cl, 1 dwg