| 摘要 |
A digging system includes a machine having a machine frame, and an implement assembly mounted to the machine frame. The implement assembly includes an elongate boom and a trenching mechanism having a plurality of drawing cutters coupled with an endless drive chain movable about a drive system mounted to an elongate boom. The implement assembly further includes an undercutting mechanism having first and second rotating cutters projecting in opposite axial directions from the distal boom end. The implement assembly defines a compound projection profile in a plane which includes first and second axes of rotation of a drive wheel and guide wheel of the drive system. The compound projection profile includes a relatively narrow proximal stem segment corresponding to the trenching mechanism and a relatively broad distal footing segment corresponding to the undercutting mechanism. Actuating the trenching mechanism and undercutting mechanism enables simultaneously digging a stem segment and footing segment of a compound trench for a foundation system. |
