| 摘要 |
A dragline excavating bucket is constructed to be supported through a minimum number of support chains and control cables, and made to provide for rapid digging and distribution of overburden removed by dumping the bucket rearwardly over a rear wall of the bucket. The bucket is supported on hoist chains that are located forwardly of the center of gravity so the bucket tends to tip rearwardly. The tilted portion of the bucket is controlled through a pair of drag chains that not only provide the pull force for loading the bucket, but also control the dumping of material from the bucket over the rear wall. Sliding trunnions are used on the bucket pivots to enhance dumping operation. |
