UNIT OF IMPACT ACTION Russian patent published in 2017 - IPC E21B1/12 E02D7/02 B25D9/26 

FIELD: machine building.

SUBSTANCE: invention relates to the unit of impact action, in particular to a pneumatic hammer, hammers, drills, and can be used in engineering, construction, mining and other industries. Unit of impact action contains a working tool, the housing and the firing pin, which form the chambers of the working and return strokes, the brake chamber, pressure hydro-pneumatic accumulator in the pressure line, the spreader, designed as a sleeve and a rotary spool. The spreader connects one of the chambers alternately to the pressure and drain line, a stepper motor, resulting in the spool rotation, displacement sensors, to track the position of the striker, and the rotation of the spool, and an electronic control unit that generates, based on signals from the sensors for a given program, the defining mode of the device, the control action on the stepper motor to rotate spreader. All this is made through the windows and the channel.

EFFECT: invention provides an expansion of the technological capabilities of the device and the rational use of drive power through the implementation of frequency and power automatic control strokes, depending on the parameters and modes of operation At the same time the invention provides the creation of switching loads on a given law, elimination of leakage at the mating surfaces of the hammer-body.

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