Apparatus for changing rotation of pedal shaft for bicycle

B - Operations – Transporting – 62 – M

Patent

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Details

B62M 11/02 (2006.01) B62M 1/02 (2006.01) B62M 11/04 (2006.01) B62M 11/14 (2006.01)

Patent

CA 2291637

An apparatus for changing rotation of a pedal shaft for a bicycle is provided, in which forward and rearward driving forces of the pedal shaft are convertible without a load, by indirect coupling, and the bicycle can be pulled rearward under the setting conditions for forward traveling. The apparatus includes: a sprocket housing installed to be freely rotatable centering the pedal shaft, to which a ring gear and a ratchet changing ring having the first one-way stoppers are fixed; a sun gear installed to be integrally rotatable with the pedal shaft; rearward rotation of the carrier can be checked by the first one-way stoppers of the ratchet changing ring; a changing gear ring coupled with the carrier to be elastically rotatable along the circumference with predeterminded rotatable angle; a fixing housing having the second one-way stoppers capable of stopping rearward rotation of the carrier; and a stopper changing ring capable of controlling the second one-way stoppers of the fixing housing.

L'invention concerne un dispositif destiné à changer le sens de rotation de l'axe de pédalier d'une bicyclette, qui permet de transformer sans charge, par couplage indirect, les forces motrices avant et arrière dudit axe, de façon que la bicyclette puisse rouler en arrière dans les conditions établies pour la marche avant. Le dispositif comprend un carter de roue dentée, conçu de façon à pouvoir tourner librement autour de l'axe du pédalier, sur lequel sont fixés une couronne et un disque de changement de plateau portant les premières butées unidirectionnelles; une roue solaire, conçue de façon à tourner en monobloc avec l'axe du pédalier, la rotation vers l'arrière du support pouvant être contrôlée par les premières butées unidirectionnelles du disque de changement de plateau; un disque de changement de plateau, couplé au support de façon à pouvoir tourner élastiquement sur la circonférence en formant un angle de rotation prédéterminé; un carter de fixation, portant les secondes butées unidirectionnelles conçues pour arrêter la rotation vers l'arrière du support; et un disque de changement de butée, conçu pour commander les secondes butées unidirectionnelles du carter de fixation.

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