Roller assembly, guide mechanism, lifting device and robot

The utility model relates to the technical field of robots, in particular to a roller assembly, a guide mechanism, a lifting device and a robot. According to the first embodiment of the utility model, the roller assembly comprises a supporting seat and a roller, a mounting groove is formed in the supporting seat, an adjusting groove is formed in the side wall of the mounting groove, the first end of the adjusting groove is close to the bottom wall of the mounting groove, and the second end of the adjusting groove is far away from the bottom wall of the mounting groove; the idler wheel comprises a wheel body and a supporting shaft, the supporting shaft is connected to the center of the wheel body, the wheel body partially extends out of the mounting groove, and the supporting shaft can move relative to the adjusting groove and be fixed. According to the idler wheel assembly, the supporting shaft moves relative to the adjusting groove and can be fixed to different positions of the adjusting groove, the distance between the wheel and the supporting base can be adjusted through the idler wheel assembly, and using flexibility and convenience are effectively improved.