Lever ball type precision measurement test bench for measuring axis bending of rotary part

The invention discloses a lever ball type precision measurement test bench for measuring axis bending of a rotary part, and belongs to the field of precision measurement of rotary parts. The lever ball type precision measurement test bench is composed of a driving tip assembly, a driven tip assembly, a moving assembly, a measuring assembly and a bottom plate assembly. The driving tip assembly is fixedly connected to the right side of the bottom plate, the driven tip assembly is fixedly connected to the left side of the bottom plate, the moving assembly is fixedly connected to the rear side of the bottom plate, and the measuring assembly is fixedly connected to a manual sliding table of the moving assembly. During installation, the driving tip and the driven tip are coaxial and are in the same vertical plane with the center of the measuring ball. According to the invention, the stepping motor drives the measured part to rotate, the encoder and the displacement sensor respectively collect the rotation angle inf