Stepless speed change mechanism

The utility model relates to a non-section speed variable mechanism. A drive plate convex hub of a force-in shaft of a non-section transmission is sleeved with a sleeve ring in clearance combination, which can radially props the transmission belt of the non-section transmission to produce a gap between the transmission belt and a drive plate of the non-section transmission, to produce an effect of low-speed and low-friction. Therefore, the drive plate and the sliding drive plate do not clamp the transmission belt, making the transmission belt do not have enough friction force to produce rotation, namely, when the vehicle engine is in idler speed, the rotation power of the vehicle engine can produce a breakdown by the gap, in this way, the utility model can replace the function of the traditional clutch, reduces the weight of the vehicle engine, and thus reducing the cost.