Magnetic drive apparatus

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

Patent

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Details

F16H 49/00 (2006.01) F16D 7/00 (2006.01)

Patent

CA 2604164

A primary disc (10) and the secondary discs (14, 16) are each fitted with magnetic means, typically in the form of permanent magnets of the same polarity, located along a radial line from the centre point of the discs (14, 16), and arranged generally transverse to the axis of rotation of the respective disc. As shown in the drawings, these magnets are also located at or adjacent to the periphery of the disc(s). The magnets are embedded into each of the primary (10) and secondary (14, 16) discs such that the faces of the magnets are flush with the exterior faces of the primary (10) and secondary (14, 16) discs. In the embodiment shown in Fig. 2, each of the magnets (22) embedded in the primary disc (10) has a North pole which is aligned with a North pole of a magnet (28) embedded in the secondary disc (14). Each of the South pole of those magnets (22) embedded in the primary disc (10) has a South pole which is aligned with a South pole of a magnet (30) embedded in the other secondary disc (16). In some embodiments, the magnets on the primary and secondary discs are arranged so as to be parallel, with their respective elongate, straight side edges aligned. In use, the inventor has observed that such an arrangement can result in less slippage between the discs (10, 14) which hold the magnets, and can assist in handling some misalignment which may occur between these discs during use, thus allowing smoother operation.

Cette invention concerne un dispositif à entraînement magnétique comprenant un disque principal (10) et des disques secondaires (14, 16) dotés chacun de moyens magnétiques, en général sous forme d~aimants permanents de même polarité, disposés le long d~une ligne radiale à partir du centre des disques (14, 16) et souvent de manière transversale par rapport à l~axe de rotation du disque respectif. Comme indiqué par les figures, ces aimants sont également disposés à la périphérie des disques ou à proximité. Les aimants sont enchâssés dans chacun des disques, le principal (10) et les secondaires (14, 16), de sorte que leurs faces se trouvent à ras de la surface extérieure des disques. Dans le mode de réalisation de l~invention illustré par la figure 2, chaque aimant (22) enchâssé dans le disque principal (10) possède un pôle nord aligné avec un pôle nord d~un aimant (28) enchâssé dans le disque secondaire (14). Chaque aimant (22) enchâssé dans le disque principal (10) possède un pôle sud aligné avec un pôle sud d~un aimant (30) enchâssé dans l~autre disque secondaire (16). Dans certains modes de réalisation de l~invention, les aimants sur les disques principal et secondaires sont disposés en parallèle, leurs bords allongés à paroi droite étant alignés. A l~usage, l~inventeur a observé qu~un tel agencement permet de réduire le glissement entre les disques (10, 14) portant les aimants, et de faciliter la correction d~un désalignement pouvant survenir entre ces disques lors de l~utilisation, d~où un meilleur fonctionnement.

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