Random orbit sander having speed limiter

Details Random orbit sander having speed limiter Random orbit sander having speed limiter

B - Operations, Transporting

24

B

B24B 23/03 (2006.01) B24B 55/00 (2006.01)

Patent

CA 2226097

A random orbit sander (10) having a speed limiter includes a bearing upon which a platen (14) is rotatably mounted. The speed limiter includes a braking member (42) formed of a non-magnetic, electrically conductive material fixed relative to the platen (14) of the sander. The speed limiter also includes at least one magnet (40) supported by a housing (12) of the sander and being disposed adjacent the braking member (42). A magnetic field formed by the at least one magnet (40) intersects the braking member (42) wherein relative movement between the at least one magnet (40) and the braking member (42) results in the generation of an eddy current force which inhibits rotation of the platen (14).

Une ponceuse à orbite aléatoire (10) ayant un limiteur de vitesse comprend un palier sur lequel est monté en rotation un disque (14). Le limiteur de vitesse comprend un élément de freinage (42) formé en un matériau non magnétique, conducteur d'électricité et fixe par rapport au disque (14) de la ponceuse. Le limiteur de rotation comprend, également, au moins un aimant (40) porté par un logement (12) de la ponceuse et disposé près de l'élément de freinage (42). Le champ magnétique produit par le ou les aimants (40) traverse l'élément de freinage (42), le mouvement relatif entre le ou les aimants (40) et l'élément de freinage (42) produit un courant de Foucault et des forces qui freinent la rotation du disque (14).

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