Stepless speed change driving disc group structure

The utility model relates to a stepless speed change driving disc group structure, a driving disc group comprises a sliding half wheel and a fixed half wheel, and the sliding half wheel is used for clamping a flexible belt-shaped object together with the fixed half wheel; one side, deviating from the fixed half wheel, of the sliding half wheel is provided with a limiting plate and a plurality of radial channels for accommodating and allowing the centrifugal balls to move, the channels are opened towards the limiting plate, and the sliding half wheel is convexly provided with a plurality of guide ribs which are arranged at intervals towards the direction of the limiting plate; the limiting plate is provided with a pressing part capable of covering a channel corresponding to the channel of the sliding half wheel, the limiting plate is concavely provided with a plurality of embedding grooves arranged at intervals in the direction from the periphery to the center, the embedding grooves are arranged corresponding