| 摘要 |
A tensioning device (20) for adjusting the contacting/cleaning force of a scraper blade (16) on the surface of an endless conveyor belt (19) is provided for use on a shaft (18) supporting the scraper blade (16). The tensioning device (20) allows the shaft (18) to be rotated and locked in a position which is very close to its optimum cleaning position, thereby increasing the efficiency of the scraper assembly (10). The disclosed tensioning device has three collars (22, 24, and 28) with a spring (26) located in between the rotatable collar (28) and adjusting collar (24). Sequences of axially-directed apertures on the adjusting collar (24) and the stationary collar (22) move into and out of registry with each other as the adjusting collar (24) is rotated. A locking pin (58) is through the aligned holes in adjusting collar (24) and stationary collar (22) when the desired amount of torsion is applied to the shaft (18).
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