Detection mechanism for output shaft group of speed reducer

The utility model relates to a detection mechanism for a speed reducer output shaft group, which comprises a material moving assembly, an outer diameter measuring assembly, a thickness measuring assembly and an inner diameter measuring assembly, and is characterized in that the material moving assembly comprises a linear moving module and a measuring platform arranged on the linear moving module; the outer diameter measuring assemblies are oppositely arranged on the two sides of the linear moving module, and each outer diameter measuring assembly comprises two outer diameter measuring heads capable of ascending and descending or moving inwards and outwards; the thickness measuring assembly is arranged above the linear moving module, and the thickness measuring assembly comprises two thickness measuring heads which can move face to face or back to back and can ascend and descend synchronously; the at least one inner diameter measuring assembly is located on one side of the linear moving module, and the inner d