FIELD: machine building.
SUBSTANCE: group of inventions relates to pulley and drive belt system, reinforced self-levelling system of pulley and drive belt, bicycle and pulley. System of pulley and drive belt comprises drive belt and, at least, one pulley is made with possibility of engagement with surface of drive belt. Bicycle comprises crank system, rear wheel hub and pulley and drive belt system. Pulley is used with drive belt. Drive belt comprises multiple projections spaced in longitudinal direction, each of which has groove for alignment, dividing each projection on first and second segments. Pulley includes housing, plurality of circumferential teeth, element to balance in form of wire.
EFFECT: higher accuracy of pulleys alignment and preventing contamination of pulleys.
23 cl, 10 dwg
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