Alternating drive for wheeled vehicles

B - Operations – Transporting – 62 – M

Patent

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Details

B62M 15/00 (2006.01) B62M 1/02 (2006.01) B62M 23/00 (2006.01)

Patent

CA 2185657

An alternating drive for wheeled vehicles comprises two opposite pedals which can move on a circular path about a pedal shaft secured on the cycle frame. The alternating drive is characterized in that it is equipped with two cranks (26, 27; 26a, 27a; 26b, 27b) which can be moved within a predetermned oscillating angle range about an auxiliary shaft (25) secured to the frame (10). Between the cranks (26, 27; 26a, 27a; 26b, 27b) and the pedals (21) is a driver connection which transforms the circular motion into an alternating oscillating motion with phases mutually offset by a half oscillation period. Disposed on each side of the axle (50) of the driven wheel (12) is a free-wheel mechanism (56, 57). The free-wheel mechanism (56, 57) lock in opposite direction and are connected to the individual cranks (26, 27; 26a, 27a; 26b, 27b) by mutually independent traction elements (29; 82, 83).

L'invention concerne un entraînement alternatif pour véhicules à roues, qui comprend deux pédales opposées déplaçables sur une trajectoire circulaire, autour d'un axe de pédales fixé au cadre. Cet entraînement alternatif se caractérise en ce qu'il comporte deux manivelles oscillantes (26, 27; 26a, 27a; 26b, 27b) se déplaçant, dans une plage angulaire d'oscillation prédéterminée, autour d'un axe auxiliaire (25) fixé au cadre (10). Une liaison à entraînement transformant le mouvement rotatif en un mouvement oscillatoire alternatif avec des phases décalées les unes par rapport aux autres d'une demi-période d'oscillation, se trouve entre les manivelles oscillantes (26, 27; 26a, 27a; 26b, 27b) et les pédales (21). Un mécanisme à roue libre (56, 57) est monté de chaque côté de l'axe (50) de la roue menée. Lesdits mécanismes à roue libre (56, 57) ont des sens de verrouillage opposés et sont reliés aux manivelles oscillantes (26, 27; 26a, 27a; 26b, 27b) individuelles par l'intermédiaire d'éléments de traction (29; 82, 83) indépendants les uns des autres.

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