Clamping changing mechanism

The invention discloses a clamping changing mechanism. The clamping changing mechanism comprises a frame, changeable clamping mechanisms, support racks, first sensors and second sensors, wherein the frame consists of an L-shaped plate, a front wall plate, a back wall plate and a middle support plate; the front wall plate is welded to one end of the L-shaped plate; the back wall plate is welded toanother end of the L-shaped plate; two ends of the middle support plate are welded to the front and back wall plates respectively; the upper end of the middle support plate is welded to the L-shaped plate; two ends of each support rack are tightly connected with the front and rear wall plates respectively; long grooves are formed in the support racks; and the first sensors and the second sensors are respectively and tightly connected with the long grooves in the support racks. Through the telescopic change of telescopic rods, one inspection machine can be used to inspect various models; and therefore, the universality