ES220500A1 - A system of change of speeds for cyclomo motors (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

System of change of speeds for mopeds, characterized in that, constituted by a series of clutch organs enclosed in a gear box adaptable to the frame of the moped, it meets the following joint conditions: A) the enclosure is adapted and fixed between the front and rear tube of the moped, without altering the normal position of the combustión engine or the axis of the chain sprocket operable by the pedal, receiving the movement of the engine by trapezoidal belt and grooved pulley; B) the grooved pulley is mounted idly on its axis, joining it with a clutch to lateral radial teeth with a plate with threaded cover, inside which acts an elastic spring, supported on a crown stop of the shaft, in the direction of to establish such solidarity, being able to annul, separating the plate with its cover from the pulley by the axial thrust of this cover effected by a rod concentric with the shaft pressed by a lever operated from the handlebar by another control; C) the axis of the control pulley has two notches, separated from each other by an assembly of a pinion and a wheel connected but not joined to each other or to the shaft, but each provided on its side with radial clutch fittings, with the corresponding of grooved pulley paths joined together pro clavetas with those notches, and axially displaceable in a synchronous way and set by the two legs of a single fork subject to the reaction of a spring that tends to clutch to only one of them, and the one of an opposing cable driven from the handlebar, which establishes three successive and stabilizable relative positions, namely, that determined by the spring, an intermediate non-clutch with the opposite toothed pinion. (Machine-translation by Google Translate, not legally binding)