FIELD: agriculture.
SUBSTANCE: group of inventions relates to agricultural machine building. Web platform comprises frame, plurality of reciprocally moving blade support levers, blade assembly and blade drive. Blade assembly is located between two adjacent support levers and rests on their front ends. Support levers turn relative to each other and relative to web platform frame. Blade assembly is made with possibility of bending. Blade drive comprises intermediate frame and first hinged drive element. Two adjacent support levers are pivotally connected with frame. Two resilient supports connect opposite sides of intermediate frame with two adjacent support levers.
EFFECT: enabling possibility of support levers turning for blade drive support following ground surface contour.
14 cl, 3 dwg
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