| 摘要 |
A belt scraper tensioning assembly attaches to a belt conveyor machine to bias a scraper blade toward a conveyor belt. The tensioning assembly is fully assembled prior to mounting to the belt conveyor. The tensioning assembly comprises a mounting plate with a central opening and a cylindrical bearing housing connected to the mounting plate coaxial with the central opening. A cylindrical bearing is positioned within the bearing housing. A tensioning arm extends radially from a cylindrical sleeve. A portion of the cylindrical sleeve is pivotally mounted within the cylindrical bearing. The cylindrical sleeve is positionable over and connectable to a shaft carrying a belt scraper such that the tensioning arm pivots as the shaft rotates. A stationery arm is connected to the mounting plate and extends along a horizontal axis of the mounting plate. The stationery arm includes an elongate slot. A tensioning rod extends through the elongate slot and has one end connected to the free end of the tensioning arm when the tensioning arm is angularly displaced less than 90 degrees from the stationery arm. A portion of the tensioning rod that extends below the stationery arm carries a spring between the stationery arm and a nut threaded on a lower end of the tensioning rod. The spring can be compressed to urge the tensioning arm toward the stationery arm and thereby rotate the belt scraper shaft to keep the belt scraper blade in close contact with the conveyor belt as the scraper blade wears.
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