FIELD: civil engineering. SUBSTANCE: working equipment includes a frame, a chain and cutters, working body lifting and lowering mechanism. The latter is connected to the frame through pull-rods with one ends hinged to the frame, and with others are hinged to one another. The chain rounds about pull-rods. The pull-rods ant the frame generate triangular hinge. The lifting mechanism presses to the triangular, with loads generated by lifting mechanism distributed through points where pull-rods are fastened to the frame. EFFECT: increased strength and reliability due to tensile stress affecting the frame. 3 cl, 1 dwg
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