| 主权项 |
1. A spreader component for a dragline excavator, in which two or more dumpblocks are connected to the component in a spaced apart manner, the spreader component comprising:
an upper coupling arrangement for enabling coupling of the component to a hoist link of the dragline, the upper coupling arrangement defining a generally transverse axis along which can lie an elongate hoist link connector for connecting the hoist link to the spreader component; at least first and second spaced apart anterior coupling arrangements, each for enabling coupling of the component to a respective dump block; at least first and second spaced apart lateral coupling arrangements, each for enabling coupling of the component to a respective lift chain for a bucket of the excavator, wherein an elongate lift chain connector connects each lift chain to a respective lateral coupling arrangement; the spreader component configured such that when assembled in a dragline and when viewed in side elevation: a first plane extends generally centrally through the upper coupling arrangement and the anterior coupling arrangements; a second plane extends generally centrally through the upper coupling arrangement and the lateral coupling arrangements; and an angle is determined between the first and second planes, with the angle being selected such that, when a lifting force is applied to the hoist link, the resultant lift chain force on each elongate lift chain connector is generally orthogonal to the elongate lift chain connector. |
