SCRAPER Russian patent published in 2023 - IPC E02F3/64 E02F3/65 

FIELD: earth-moving transportation machines.

SUBSTANCE: scraper contains a tractor, a bucket, a fifth wheel, a traction frame, consisting of two parts connected to each other with the possibility of limited movement and equipped with a hydraulic shock-absorbing device, including a hydraulic cylinder connected to hydraulic accumulators through hydraulic throttles. The scraper is equipped with controlled hydraulic valves, adjustable hydraulic reduction valves, a hydraulic valve with an OR logic function and a displacement sensor. The front and rear parts of the traction frame are pivotally connected by means of levers and a hydraulic cylinder, the cavities of which are connected by hydraulic lines with the side outlets of the hydraulic valve with a logical OR function, and the middle outlet is connected to the first controlled hydraulic valve, connected via one outlet through the first adjustable hydraulic throttle valve with the first hydraulic accumulator and the other outlet is connected through the second adjustable hydraulic throttle valve and the second controlled hydraulic valve with the second hydraulic accumulator. The control element of the second controlled hydraulic valve is connected by an electric line to a displacement sensor mounted on the hydraulic cylinder of the lifting drive of the working element, and the hydraulic cylinder lifting cavity is connected through the third adjustable hydraulic throttle valve with the control chamber of the first controlled hydraulic valve, made with a spring-loaded spool and a mechanism for regulating the force of spring elasticity. Hydraulic accumulators are connected through adjustable reducing hydraulic valves with a pressure hydraulic line, and through valves with a hydraulic tank.

EFFECT: increase in smoothness of the course and speed in the transport mode, an increase in the productivity and reliability of the operation of the scraper.

1 cl, 1 dwg