| 摘要 |
The invention relates to a sprocket wheel for underground mining, especially for chain-driven chain scraper conveyors, with a first ring 2 of first tooth elements 5 distributed uniformly about the circumference of the sprocket wheel body 1 , at least one second ring 3 or 4 , disposed axially offset to the first ring 2 , having further tooth elements 6 or 7 , distributed uniformly about the circumference. The flanks of the tooth elements that face one another are provided with pockets 13 , that serve as contact surfaces for the horizontal chain links 9 . In order to increase the service life of the sprocket wheel, the contact surfaces in the pockets 13 of each tooth element 5, 6, 7 comprise a wear inlay 20 of wear-resistant material.
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