Precise spring fatigue detection device

The utility model discloses a precision spring fatigue detection device, which relates to the spring fatigue detection technology field, and comprises a transmission frame and a pedestal, the bottom surface of the transmission frame is fixedly connected with a motor 1, the inner part of the transmission frame is rotatably connected with a bidirectional threaded rod, the front surface of the motor 1 is provided with a tooth belt, and the tooth belt is provided with a spring. By arranging a two-way threaded rod, a clamping block, a fixed piece, a rotating piece, a first spring and other components, placing the fixed piece and the rotating piece, tightly jacking the rotating piece through the first spring, limiting of a shell is achieved, a first motor drives a gear to rotate, the other gear is driven to rotate through the gear and a toothed belt, and then the two-way threaded rod is driven to rotate; the bidirectional threaded rod drives the air cylinder to move through the connecting rod, the shell is clamped