| 摘要 |
A device formed by a plurality of metal cores having at the top hard metal scraper bits, in which the cores are parallel to each other but are not in contact with each other. The cores are embedded in a one-piece block of polyurethane, rubber or other elastomeric material, connected to a positioning shaft by a housing pocket, and placed close to a belt conveyor drum. In order to automatically compensate for wear of the scraper bits, the positioning shaft is connected to the conveyor by an elastic suspension and a pair of hinge joints fixed to side brackets placed on a frame. The arrangement for securing the block to the housing pocket causes an upward bending thereof, thus forcing the embedded cores and therefore the scraper bits to be arranged along an imaginary broken line tangent to the block bending.
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