O-shaped ring detection fixing device

The utility model relates to the technical field of manufacturing of room temperature vulcanized silicone rubber test pieces, and provides an O-shaped ring detection fixing device which comprises a main shaft, a fixing nut arranged at the top of the main shaft and a plurality of pressing plates arranged on the main shaft, a space used for compressing an O-shaped ring is arranged between adjacent pressing plates, and thrust ball bearings are arranged between the fixing nut and the pressing plates. The thrust ball bearing is used for replacing a gasket between the fixing nut and the pressing plate, the nut and the pressing plate only generate friction force with the contact surface of the seat ring and the shaft ring, the surface roughness of the thrust ball and the raceway groove is small, the friction force is reduced to the minimum, the thrust ball converts torsion into vertical compression force, and in addition, the thrust ball bearing only generates self gravity, so that the friction force is reduced to t