The utility model discloses a quality casual inspection mechanism applied to automatic production of a rectangular coordinate
robot. The quality casual inspection mechanism comprises a rack, at least two pneumatic sliding rails, at least two sliding table assemblies and a protection
assembly, the at least two pneumatic sliding rails are mounted at the top of the rack side by side, and each pneumatic sliding rail is provided with a sliding table
assembly; the protection
assembly is connected with the top, and the at least two sliding table assemblies are located in the protection assembly. Each sliding table assembly comprises a sliding table base plate, a centering seat base and a centering sleeve, and the sliding table base plate is connected with a pneumatic sliding rail; the centering seat base is arranged on the face, away from the pneumatic sliding rail, of the sliding table base plate, a protrusion is further arranged in the middle of the face, away from the pneumatic sliding rail, of the centering seat base, matched grooves are formed in the two ends of the centering sleeve, the arranged protrusion extends into the formed grooves, and the
diameter of the centering sleeve is smaller than that of the centering seat base. The disc diameters of
brake disc parts are determined to be different, centering sleeves with different outer
diameter ranges are replaced, and therefore switching is convenient and fast.