Pneumatic one-way overrunning clutch

The utility model provides a pneumatic one-way overrunning clutch, which relates to the technical field of clutches, and is characterized in that a driving assembly comprises an inner ring connected with a power input shaft, a transmission disc connected with the inner ring in a matched manner, and an elastic piece arranged between the inner ring and the transmission disc in an abutting manner; the driven assembly comprises a one-way gear ring and an outer ring, wherein a plurality of pin rollers are arranged on the inner circumference of the one-way gear ring, and the one-way gear ring is sleeved with the outer ring. The pneumatic assembly comprises an air inlet ring and a transition ring, the air inlet ring is provided with an air inlet, and an air chamber is arranged between the transition ring and the air inlet ring; when the air inlet is ventilated, the transition ring drives the transmission disc to move to be combined with the pin rollers under the action of air pressure, in the combination state, if t