One-way overrunning diaphragm coupler

The invention provides a one-way overrunning diaphragm coupler. The one-way overrunning diaphragm coupler comprises half-couplers, diaphragm sets and a one-way overrunning clutch, wherein the one-way overrunning clutch comprises an outer ring and an inner ring, a flange is arranged at one end face position of the one-way overrunning clutch, a flange shaft is arranged at the other end face position of the one-way overrunning clutch, the flange is connected with one end face of the outer ring in a threaded mode through a plurality of bolts, the flange shaft is connected with an inner hole of the inner ring through a key, the half-couplers are arranged at the outer sides of the flange and the flange shaft respectively, and the diaphragm sets are arranged between the half-coupler and the flange and between the half-coupler and the flange shaft respectively. By means of the one-way overrunning diaphragm coupler, the synchronous rotation of a driving shaft and a driven shaft in machinery for transmitting power and movement can be achieved, an automatic clutch switch function for transmitting torque or overrunning is achieved, and meanwhile reversion can also be prevented. In addition, non-contact and non-abrasion can be achieved during high-speed running, the heating is reduced, the service life is long, the disassembly is convenient, the maintenance is simple, multiple functions are achieved, the cost is low, and the economical and practical effect is achieved.