Three point fixation fatigue test clamping device

The utility model belongs to mechanical clamping device field relates to a three point fixation fatigue test clamping device, including length adjustment element 1, adapting unit 2 and centre gripping subassembly 3, length adjustment element 1 comprises first billet 11 and first spring steel 12, first spring steel is located first billet bottom, and through first bolt, the second bolt is connected fixedly with first billet, first billet is by positive two the trapezoidal pieces cutting apart of the slash that keeps left of middle part of first billet, adapting unit with length adjustment element is through the 3rd bolted connection, the centre gripping subassembly includes second billet, second spring steel and a pair of spring steel, the second spring steel passes through fourth bolt, the 5th bolt fixed connection with the second billet, and connect through fourth bolt, the 5th bolt and adapting unit. The utility model provides a reference sample problem of placing, has reduced and has referred to influencin