| 摘要 |
<p>The invention provides for the design of a dragline bucket of the type where there are separate front and rear hoist ropes attached to front mounting points (110, 111) and rear mounting points (109) respectively. The front and rear hoist ropes can be independently operated to vary the horizontal attitude of the bucket. The bucket design methodology seeks to equalize the loads in the front and rear hoist ropes during the major phases of the operating cycle such as digging, hoisting and dumping, and this is typically achieved by providing a bucket with comparatively shallow side walls (103, 104) compared with the overall length of the bucket and the positions at which the front and rear hoist ropes ultimately join onto the bucket. The bucket typically has a flat floor (102) and relatively shallow side walls which may in some embodiments taper downwardly from the rear section (106) to the front section (107).</p> |
