Collaborative robot and tail end vision system thereof

The invention relates to the technical field of robot equipment, and discloses a collaborative robot and a tail end vision system thereof, and the collaborative robot comprises a shell which is internally provided with a containing cavity; the camera is fixedly assembled in the accommodating cavity; the camera is provided with a threaded hole, and the lens is movably assembled in the threaded hole in a threaded mode; the focusing device comprises a focusing knob, a driving wheel, a transmission assembly and a driven wheel, the focusing knob and the shell are rotationally assembled, the driving wheel and the focusing knob are assembled in a rotation stopping mode, the transmission assembly is in transmission connection between the driving wheel and the driven wheel, and the driven wheel and the lens are assembled in a rotation stopping mode; and the locking device comprises a locking knob, the locking knob is in threaded assembly with the shell, the locking knob is provided with a top pressing end close to the