| 摘要 |
FIELD: ground shifting machines, particularly ground-cutting devices adapted to cut narrow trenches. ^ SUBSTANCE: ground-cutting tool comprises driving sprocket, guiding frame with head part and tightening device, cutting chain with cutter holders and cutters. The cutting chain comprises side plates connected with each other by pins provided with bushes installed in pin centers. The bushes have rollers. Trundles with outer grooves are fastened to both pin ends. The trundles are rotated to engage side sprocket members of three-layer driving sprocket and may be supported by side plate extensions of guiding frame and head part during chain movement along guiding frame. ^ EFFECT: increased efficiency and reliability of executive tool. ^ 3 dwg |
