WORKING EQUIPMENT OF ROAD MACHINE Russian patent published in 2020 - IPC E02F9/22 E02F3/04 E02F3/36 

FIELD: machine building.

SUBSTANCE: invention relates to construction and road machines and can be used in particular for road maintenance machines. Working equipment of the road machine includes a manipulator made in the form of a rotary post and a sectional boom hingedly connected to it with hydraulic cylinders of the drive and with a working element, a hydraulic distributor and a hydraulic accumulator. Working equipment is equipped with safety grate, second hydraulic accumulator, reduction hydraulic valves and displacement sensors, wherein hinge connecting second and third boom sections is inclined in clockwise direction in plane perpendicular to longitudinal axis of second boom section, and hydraulic cylinders of these sections drive are interconnected by similar cavities and their piston cavities are interconnected with four-position hydraulic distributor connected to the first hydraulic accumulator, and rod cavities are interconnected with two-position electrocontrolled hydraulic distributor connected to the second hydraulic accumulator. Hydraulic accumulators are communicated via valves with hydraulic tank and pressure hydraulic line through reduction hydraulic valves adjusted for charging pressure of second hydraulic accumulator of higher value than that of the first one. Safety grid is installed on working element and is made in form of arc-shaped levers in front part and connected with shaft, which is hingedly fixed on working member and is rigidly connected with stops and shutter-contactor of displacement sensors installed on working member, and one of them is connected by electric line to sound and sound signaling device, and the second one is connected to control coil of on-off hydraulic distributor.

EFFECT: higher reliability of working equipment, higher speed and efficiency.

1 cl, 3 dwg