WORKING EQUIPMENT OF MOLDBOARD TYPE Russian patent published in 1995 - IPC

FIELD: earth-moving and excavation. SUBSTANCE: working equipment of moldboard type has moldboard made of three sections: one middle and two side ones. Side sections are connected with middle by means of rotary hinges installed at angle relative to longitudinal vertical plane of equipment. Moldboard is connected with pushing frame means of ball joint. Connected to middle section with its one end is bracket which is located in vertical guides installed on pushing frame for locking in extreme positions by pins of retainers with hydraulic control. Connected to the other free end of bracket is hydraulic cylinder for lifting and lowering of equipment and turning moldboard in longitudinal vertical plane of equipment. Turning of side sections is effected by hydraulic cylinders hinged to middle section. Longitudinal axis of these hydraulic cylinders make angle of 90 deg. with longitudinal axis of rotary hinges. EFFECT: higher efficiency. 3 cl, 7 dwg