Motor armature dimension measuring device

The invention belongs to the technical field of motors, and particularly relates to a motor armature size measuring device which comprises a feeding mechanism, a photographing mechanism, an outer circle measuring mechanism, a bottom plate and an armature, the feeding mechanism, the photographing mechanism and the outer circle measuring mechanism are integrated on the bottom plate, the feeding mechanism comprises a left module and a right module which are installed on the bottom plate, and a first bottom plate is connected to a carrying table in the left module and a carrying table in the right module; a right fixing block and a left fixing block are arranged at the two ends of the first bottom plate respectively, and a jacking air cylinder and a linear guide rail are installed on the left fixing block. According to the technical scheme of the motor armature size measuring device, after the armature is tightly pressed and fixed, the first rotating servo motor drives the armature to coaxially rotate at a consta