Motion transmission devices

H - Electricity – 02 – K

Patent

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Details

H02K 49/10 (2006.01) F16H 13/12 (2006.01) F16H 19/02 (2006.01) F16H 25/20 (2006.01)

Patent

CA 2332942

A magnetic motion transmission device (10) which comprises a magnetic body (15) which has an outer cylindrical surface and radial end walls, is polarised axially of the cylindrical surface and, at the opposed radial ends of the cylindrical surface, has a pair of disc-like pole plates (14, 16) that are of a like diameter greater than the diameter of the cylindrical surface. The pole plates (14, 16) are mounted axially at the opposed radial ends of the magnetic body by an axle pin (18) of non-magnetic material (e.g. brass). The device (10) serves in use to effect motion transmission between first and second members (11, 12), the second surface being either planar or cyclindrical or frusto-conical. Examples described of applications of the magnetic motion transmission device (10) include an arrangement in which the second member (12) is cylindrical and provides a rotary output drive - derived magnetically from the first member (11) - to an angularly rotable output shaft of a pivoting gate or like closure member for an opening, and an arrangement in which the second member is an upstanding planar surface internally of a hollow bollard located adjacent one edge of a throughway, and a barrier element extends from a said first member within the hollow bollard to another said first member within a similar bollard located adjacent an opposite edge of the throughway.

L'invention concerne un système (10) de transmission magnétique de mouvement qui comprend un corps (15) magnétique présentant une surface externe cylindrique et des parois terminales radiales. Ce corps magnétique est polarisé dans l'axe de la surface cylindrique et comprend, au niveau des extrémités radiales opposées de la surface cylindrique, deux plaques (14, 16) polaires en forme de disques de diamètre égal, ce diamètre étant supérieur à celui de la surface cylindrique. Les plaques (14, 16) polaires sont montées axialement sur les extrémités radiales opposées du corps magnétique au moyen d'une tige d'axe formée d'un matériau non magnétique (p. ex. laiton). Ce système (10) sert à la transmission d'un mouvement entre un premier et un second élément (11, 12), la seconde surface étant planaire ou cylindrique ou tronconique. Les exemples d'applications du dispositif (10) de transmission de mouvement magnétique comprennent un système dans lequel le second élément (12) est cylindrique et produit un entraînement de sortie rotatif dérivé magnétiquement du premier élément (11) s'exerçant sur l'arbre de sortie à rotation angulaire d'un portail pivotant ou d'un élément analogue servant à fermer une ouverture, ainsi qu'un système dans lequel le second élément est une surface planaire verticale à l'intérieur d'une borne creuse adjacente à un côté d'une voie de passage et un élément barrière s'étend à partir du premier élément de la borne creuse jusqu'à un autre premier élément installé dans une borne similaire située sur le côté opposé de la voie de passage.

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