The energy generator relates to the field of mechanical engineering, in particular to rotary actuator devices. The device comprises a housing, in which a drive shaft is installed; a driving link, which includes a mechanism for transmitting the rotation of the shaft to elements with an unbalanced mass via a driving wheel that is installed on the drive shaft; a kinematic chain between the driving link and a final consumer, which comprises working nodes which are able to transfer a working moment. According to the claimed technical solution, the driven eccentric wheels are mounted so as to be capable of rotating on additional stationary driven axles, rigidly connected to one another at both ends thereof by a coupling element, namely a rocker arm. The driven axle is equipped with an additional coupling link, which is connected to a movable element of a working chamber with a variable volume; the chamber is connected via a receiver with the final consumer. The device may comprise additional driving wheels and additional driven eccentric wheels that are connected to the same driving wheel and rigidly attached to the same rocker arm in series.