Eccentric device for gear set of bicycle

B - Operations – Transporting – 62 – M

Patent

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Details

B62M 9/08 (2006.01) B60B 27/02 (2006.01) B62M 11/16 (2006.01)

Patent

CA 2218207

The present invention relates to an eccentric device of the gear set of bicycle of the type which includes a braking disk, a transmission gears set, an eccentric shafts set, and a hub assembly. The eccentric shafts set is disposed within the hub assembly and it could be rotated with respect to the hub assembly. When the eccentric shaft is located at the center of the hub assembly, the hub assembly can be readily rotated by the flywheel. When the braking disk is braked, the eccentric shafts set can be rotated with respect to the hub assembly through the transmission gears set. A shifting effect can be therefore attained. The shifting displacement can be readily controlled by the braking time of the braking disk. When the braking disk is released, the hub assembly can be readily rotated as centered on the eccentric shafts. Accordingly, the rear wheel will be oscillated upward and downward when it is rotated. The present invention can be readily shifted between the normal or shifted modes. The shifting displacement can be readily adjusted.

La présente invention concerne un dispositif excentrique de la transmission d'un bicycle comprenant un disque de freinage, une transmission intermédiaire, un arbre excentrique et un moyeu. L'arbre excentrique est placé dans le moyeu et peut tourner par rapport à celui-ci. Lorsque l'arbre excentrique est placé au centre du moyeu, le moyeu peut être tourné facilement par le volant. Lorsque le disque de freinage est engagé, l'arbre excentrique peut être tourné par rapport au moyeu au moyen de la transmission intermédiaire. On peut donc obtenir ainsi un effet de déraillement. Le déplacement du déraillement peut être facilement contrôlé par le temps de freinage du disque. Une fois le disque dégagé, le moyeu peut être tourné facilement lorsqu'il est centré sur l'arbre excentrique. La roue arrière oscillera vers le haut et vers le bas lorsqu'on la fait tourner. La présente invention permet donc de passer rapidement du mode normal au mode déraillement. Le déplacement du déraillement peut être réglé facilement.

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