Automatic clamping mechanism for bearing ring machining device

The utility model discloses an automatic clamping mechanism for a bearing ring processing device, which belongs to the technical field of bearing processing and comprises a connecting seat, four sliding connecting devices are connected outside the connecting seat, limiting devices are connected onto the sliding connecting devices, and the limiting devices are arranged outside the connecting seat in a sliding manner. According to the automatic clamping mechanism for the bearing ring machining device, clamping plates, contact rods, an extrusion groove, a second elastic rod, a sliding rod, a clamping block and a limiting groove are arranged, a connecting base moves downwards, at the moment, the extrusion groove extrudes the four contact rods, the four clamping plates get close to one another to be clamped outside a bearing ring, meanwhile, the sliding rod moves upwards in a sliding sleeve, and when the clamping block moves into the limiting groove, the clamping block moves upwards; according to the bearing ring