ELECTRO-HAMMER Russian patent published in 2010 - IPC E02D7/00 

FIELD: construction industry.

SUBSTANCE: invention refers to construction industry, for example for driving of building units. Electro-hammer contains casing with stator, anchor-head, anvil block with inertia absorber; electro-hammer is provided with connecting branch with hydraulic lines, hydro-gas-charged accumulator and interface element located in electro-hammer casing, in its lower part; and anchor-head is installed on anvil designed as piston of major diametre equal to inner diametre of casing of electro-hammer, this anvil is connected by rod to piston of minor diametre placed in hydraulic cylinder of minor diametre. This hydraulic cylinder of minor diametre is installed on hydraulic cylinder of major diametre with piston which lower plane is connected by its rod to anvil block installed on driven pile, at that formed upper cavity of hydraulic cylinder of minor diametre is connected by hydraulic line to lower cavity of hydraulic cylinder of major diametre and to hydro-gas-charged accumulator, and lower part of hydraulic cylinder of minor diametre is connected by its hydraulic line to connecting branch with check valve.

EFFECT: enhancement of reliability of electro-hammer operation.

1 dwg