Thermal fatigue experiment device of constant stress loading

The utility model relates to the field of thermal fatigue experiments, in particular to a thermal fatigue experiment device of constant stress loading. The device can satisfy the test of the thermal fatigue performance of materials used under a special environment. The device is provided with a beam loading part, an induction heating part, a sample cooling unit and a strain measuring unit which respectively correspond to a sample, wherein the beam loading part comprises a beam, a weight, a testing table, a universal joint connecting device and a fulcrum, the beam is arranged on the fulcrum, one end of the beam is provided with the weight, the other end of the beam is provided with the universal joint connecting device, the sample is arranged between the universal joint connecting device and the testing table arranged under the universal joint connecting device, and the device further comprises a data recording unit which is connected with the strain measuring unit. The sample load is increased or reduced by a