Limiting ring of PCB (Printed Circuit Board) main shaft clamping seat

The utility model discloses a PCB main shaft clamping seat limiting ring which comprises a clamping seat body, a guide hole is formed in the front face of the clamping seat body, a through hole and a notch are formed in the top of the clamping seat body, a mounting hole is formed in the inner side of the notch, a mounting groove is formed in the center of the bottom of the clamping seat body, and a screw opening is formed in the inner side of the mounting groove. The inner side of the mounting groove is fixedly connected with a fixing cover through a screw opening, the top of the fixing cover is movably connected with a fixing screw in a penetrating mode, and the front face of the clamping base body and the front face of the fixing cover are each provided with a main shaft mounting opening. According to the installation mode, the main shaft installation opening and the center points of the two guide holes are located on the same horizontal line, so that the alignment precision of the PCB main shaft clamping s