PCB automatic feeding mechanism

The utility model discloses a PCB automatic feeding mechanism which comprises a PCB feeding table, a grabbing and transferring assembly, a conveying line, a pneumatic sliding assembly, a feeding carrying table and a visual detection assembly, and the grabbing and transferring assembly comprises a horizontal carrying plate, a sliding plate, a transferring air cylinder, a supporting table, a lifting air cylinder, a connecting plate, a plurality of guide rod and guide sleeve assemblies, a rotating assembly, a clamping air cylinder and a clamping jaw. According to the mechanism, the PCB feeding table is used for bearing a plurality of PCBs, the multiple PCBs are synchronously grabbed, moved, rotated by 90 degrees and placed on the conveying line through the grabbing and transferring assembly, the CCD industrial camera arranged on one side of the conveying line is used for implementing side face first-step visual inspection, and then the PCBs are grabbed and placed on the feeding carrying table through the pneumat