Alternating drive, primarily for bicycles and similar driven...

B - Operations – Transporting – 62 – M

Patent

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Details

B62M 1/02 (2006.01) B62M 1/06 (2006.01)

Patent

CA 2750124

Alternating drive primarily for bicycles and similar driven vehicles, in which the rotation of driven pedals are converted into reciprocating swinging motion of swinging arms, and the swinging arms have respective driving arms (16, 16') coupled to a head portion (14, 14') surrounding the swinging shaft (11) of the pedals from which a traction arm (17, 17') is extending out that closes an angle with the driving arm and the remote ends of the driving and traction arms (16, 17) are interconnected by a connection arm (20, 20'). A substantially triangular opening is formed between these arms, and the shaft of a driving wheel (15, 15') is positioned in this opening, the traction arm defines a traction path (19, 19'), and a flexible pulling rope (28) that rotates the driven wheel of the vehicle is led around at least one rope wheel (26) that has a shaft (35) guided and led along the traction path for adjusting the transmission ratio.

L'invention porte sur un entraînement alternatif, essentiellement pour des bicyclettes et autres véhicules entraînés pareillement, dans lequel la rotation des pédales entraînées est convertie en un mouvement de balancement alternatif de bras de balancement, et les bras de balancement ont des bras d'entraînement respectifs (16, 16') couplés à une partie tête (14, 14') entourant l'arbre de balancement (11) des pédales à partir desquels un bras de traction (17, 17') s'étend vers l'extérieur et ferme un angle avec le bras d'entraînement, et les extrémités éloignées des bras d'entraînement et de traction (16, 17) sont reliées mutuellement par un bras de liaison (20, 20'). Une ouverture sensiblement triangulaire est formée entre ces bras, l'arbre d'une roue d'entraînement (15, 15') est positionné dans cette ouverture, le bras de traction définit un trajet de traction (19, 19'), et un câble de traction souple (28) qui fait tourner la roue entraînée du véhicule est amené autour d'au moins une poulie (26) qui présente un arbre (35) guidé et amené le long du trajet de traction pour régler le rapport de transmission.

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