Dust shield for a pulley bearing and a pulley with a dust...

F - Mech Eng,Light,Heat,Weapons – 16 – C

Patent

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Details

F16C 33/72 (2006.01) F16C 33/78 (2006.01) F16H 55/36 (2006.01)

Patent

CA 2653860

A dust shield to inhibit the ingress of foreign materials into a pulley bearing is disclosed as is a pulley including such a dust shield. The dust shield is press fit to one side of the bearing such that it is captive during assembly and/or installation of the pulley. A second dust shield can be provided on the opposite side of the bearing to further inhibit the ingress of foreign materials. Preferably, at least one of the dust shields includes a bolt retention feature which holds an installation bolt captive to the pulley prior to installation. The dust shields can be fabricated from selected materials with desired thermal characteristics to insulate the bearing from sources of undesired heat and/or to assist the removal of waste heat from the bearing.

La présente invention concerne un écran anti-poussière destiné à interdire la pénétration de substances étrangères à l'intérieur d'un palier de poulie, ainsi qu'une poulie munie d'un tel écran. L'écran anti-poussière est emmanché avec un ajustage serré sur un côté du palier de manière à être emprisonné au moment du montage et/ou de l'installation de la poulie. Un second écran anti-poussière peut équiper le côté opposé du palier afin d'assurer une protection renforcée contre la pénétration de substances étrangères. De préférence, au moins un de ces écrans anti-poussière dispose d'un élément de retenue de boulon qui emprisonne un boulon d'installation sur la poulie avant installation de cette dernière. Ces écrans anti-poussière peuvent être fabriqués à partir de matériaux choisis en fonction de caractéristiques thermiques adéquates pour isoler le palier de sources de chaleur indésirables et/ou faciliter l'évacuation des rejets thermiques du palier.

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