Non-sliding type stepless speed change device

The utility model discloses a non-sliding type stepless speed change device, which belongs to the technical field of transmission devices. A rolling friction variable speed transmission mechanism is arranged between a driving friction disc and a driven friction disc which are arranged in parallel in an off-axis manner; the friction speed change mechanism is a ball disc friction speed change mechanism or a wheel disc friction speed change mechanism; and the transmission ratio can be changed through changing the ratio of the distances from the contact point of the friction speed change mechanism and the driving friction disc and the contact point of the friction speed change mechanism and the driving friction disc to a driving shaft and to a driven shaft respectively. The non-sliding type stepless speed change device solves the defect that the existing various stepless speed change devices can not eliminate the relative slipping between the friction surfaces through changing the sliding between the friction sur