| 摘要 |
Device for a mechanical digger (10), where the mechanical digger comprises a lower drive machinery (12) and an upper rotatory part (14), where to the upper part (14) is connected a digging unit comprising a vertically rotatory lifting arm (18) which is articulately connected to a digging arm (20) to which a shovel is articulately fitted, and pressure cylinders (24, 26, 28) arranged to drive the digging unit. A first end of an auxiliary device (30) is fitted to the upper part (14) so that it can be displaced horizontally, and another end of the device (30) is fitted to the lifting arm (18), where the auxiliary device (30) is arranged to provide a counter force which approximately corresponds to the downward directed force vector of the digging unit.
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