Toothed belt drive with varying tooth pitch

A toothed belt drive comprising a toothed belt and at least two toothed pulleys, wherein the toothed belt has at least one drive side provided with a toothed profile, wherein the toothed belt wraps around the toothed pulleys over a partial area of their circumference and teeth of the toothed belt meshingly engage in tooth gaps of the at least two toothed pulleys;

• wherein at least one of toothings on the toothed belt or at least one pulley of the at least two toothed pulleys is formed as a series of tooth pitches varying along the circumference;
• wherein individual tooth pitches are designed to vary by up to a maximum of 5% relative to a mean tooth pitch on the toothed belt or the at least one pulley of the at least two toothed pulleys, and wherein an absolute deviation of a varying tooth pitch from the mean tooth pitch on the is limited by backlash of the toothing;
• and,
• wherein the backlash results from the difference of the width eS of the tooth gaps of the respective toothed pulley and width eR of teeth of the toothed belt in the middle of a tooth height of the teeth of the toothed belt.