| 摘要 |
<p>A stacker-reclaimer has a luffing and slewing mounting (2, 4) supporting a boom structure with a main, forwardly extending boom (14) having material-conveying means running along it, and a rearwardly extending tail boom (22) with a counterbalance weight (34) depending from its rear end. The tail boom is at a higher level than the main boom to provide clearance of a feeder conveyor (26) to the material-conveying means. The counterbalance weight is attached by a pivot (30) on the tail boom and is displaceable about the pivot by a control cable (36) attached to a non-luffing part (40) of the luffing and slewing mounting forwards of the luffing axis (6) whereby the weight is displaced forwards in relation to the pivot in upward luffing movements of the boom structure. This compensates for the rearward displacement of the rear end of the tail boom in such movements, and reduces the maximum overturning moment to be resisted in the working luffing range.</p> |
