Tensioning device for a belt scraper

B - Operations – Transporting – 65 – G

Patent

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Details

B65G 45/16 (2006.01)

Patent

CA 2245008

A tensioning device for adjusting the contacting/cleaning force of a scraper blade on the surface of an endless conveyor belt is provided for use on a shaft supporting the scraper blade. The tensioning device allows the shaft 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. The disclosed tensioning device has three collars with a spring located in between the rotatable collar and adjusting collar. Sequences of axially-directed apertures on the adjusting collar and the stationary collar move into and out of registry with each other as the adjusting collar is rotated. A locking pin is through the aligned holes in adjusting collar and stationary collar when the desired amount of torsion is applied to the shaft.

Ce dispositif de mise sous tension (20), destiné à régler la force de contact/nettoyage d'une lame de racloir (16), appliquée sur la surface d'une courroie de transporteur sans fin (19), est utile sur un arbre (18) soutenant la lame du racloir (16). Le dispositif de mise sous tension (20) permet à l'arbre (18) d'être mis en rotation et bloqué dans une position dans laquelle il est très proche de sa position optimale de nettoyage, ce qui permet d'accroître l'efficacité de l'ensemble racloir (10). Le dispositif décrit comprend trois colliers (22, 24 et 28) ainsi qu'un ressort (26) monté entre le collier rotatif (28) et le collier de réglage (24). Des suites d'ouvertures dirigées axialement et ménagées sur le collier de réglage (24) et sur le collier fixe (22) sont déplacées pour être mises en face les unes des autres, ou ne pas l'être, lorsque le collier de réglage (24) est mis en rotation. Une goupille de blocage (58) traverse les trous alignés du collier de réglage (24) et du collier fixe (22), lorsque l'on applique la quantité nécessaire de torsion sur l'arbre (18).

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