Automatic clamping and rotating device for rotor spot welding

The utility model relates to an automatic clamping and rotating device for rotor spot welding, which comprises a sliding table mounting plate, a main shaft table arranged on one side of the sliding table mounting plate, an air cylinder fixing plate arranged on the other side of the sliding table mounting plate, a tensioning air cylinder arranged on the back surface of the air cylinder fixing plate, and a clamping plate arranged on the back surface of the tensioning air cylinder, a push rod of the tensioning air cylinder extends out of the surface of the air cylinder fixing plate, the first bearing is arranged in the mounting through hole, the sandwich shaft sleeve is connected with an inner ring of the first bearing in a sleeving mode, and the initial end of the sandwich shaft sleeve is arranged in the mounting through hole; and a chuck for clamping or loosening the axis of the motor rotor is sleeved in the opening at the initial end of the sandwich shaft sleeve. According to the automatic clamping and rotati