Tension-compression self-centering adjusting device for universal testing machine

The utility model relates to the field of material mechanical property test detection, in particular to a tension-compression self-centering adjusting device for a universal testing machine, which comprises two lead screws mounted on the universal testing machine, a cross beam, a bearing seat, a coaxial detection rod, a loading base and a force value sensor, one end of the rod body is provided with a semi-convex spherical end, the other end of the rod body is provided with a threaded connection end, the cross beam is arranged between the two lead screws, a center hole is formed in the middle of the cross beam, the bearing seat is arranged above the center hole, the loading base is arranged below the center hole, the rod body is sleeved with the center hole, and the semi-convex spherical end is fixed through the bearing seat. The threaded connection end is fixed by using the loading base, the force value sensor is mounted below the loading base, and the coaxial detection rod is arranged, so that in the test pr