WHEEL-TYPE TRENCHING MACHINE Russian patent published in 1995 - IPC

FIELD: earth-moving machinery. SUBSTANCE: possibility of constantly keeping front-end attachment of machine in strictly vertical position irrespective of cross tilting of tractor caused by cross irregularities of terrain precludes digging of side wells of trench at its bottom by machine rotor. Strictly vertical walls of trench are thus formed. There are no side efforts in lower part of rotor, and twisting loads in metal structures which lead to breaking of the latter are excluded. Arrangement of joint connecting beam of tractor slewing circle with system of frames of front-end attachment below slewing circle level, despite the arrangement of travel motion drive under the slewing circle, makes it possible to reduce moment caused by traction effort fluctuations and dynamic loads on machine in excavating frozen ground and permafrost. EFFECT: enlarged operating capabilities. 4 dwg