SCRAPER Russian patent published in 2021 - IPC E02F3/64 

FIELD: soil-shifting.

SUBSTANCE: invention relates to excavating machines and can be applied in scrapers. The technical result is achieved due to the fact that the scraper includes a basic machine, working equipment in the form of a bucket and a front gate with hydraulic lifting drives, a loading roller attached hingedly to the front gate with a hydraulic cylinder of the drive, communicating with a hydraulic accumulator connected with a pressure hydraulic line via a reduction hydraulic valve, wherein the scraper is equipped with reduction, return, pressure and electrically controlled pneumatic valves, adjustable pneumatic throttles, an air receiver, an air collector, a sensor of the soil volume in the bucket and a compressed air source in the form of a pneumatic cylinder attached hingedly to the bucket and frame and communicating with the air receiver via the adjustable pneumatic throttles and return pneumatic valves, wherein said receiver is connected by a pneumatic line with the flexible shell of the loading roller via the reduction pneumatic valve and communicates by a second pneumatic line with the air collector via the electrically controlled pneumatic valve connected by the electric control line with the sensor of the soil volume in the bucket, wherein the hydraulic control distributer of the bucket lifting hydraulic cylinder is configured for the lifting cavity to communicate with the hydraulic accumulator in one of the positions of the slide valve.

EFFECT: increased productivity due to the increase in the filling capacity of the bucket achieved by hardening the cut chips using a roller with a flexible shell filled with air under pressure.

2 cl, 3 dwg