Lower cross beam guide mechanism of stacking robot

The invention relates to the technical field of suspension guiding, and discloses a lower cross beam guiding mechanism of a stacking robot. A rotating hole is formed in the center position of one side of a rotating plate, the rotating hole is movably connected with a limiting groove in a sleeving mode, limiting holes are formed in the positions, close to the top and the two ends, of one side of the rotating plate, and the limiting holes are arranged with limiting rods in a sleeving mode; an air guide hole is formed in the position, between the rotating hole and the limiting hole, of one side of the rotating plate. When the rotating device rotates to a limit position, the upper circulation hole and the air guide hole are communicated, high-pressure air passes through the rotating device and the upper circulation hole and enters the air guide chamber, the stroke rod is ejected out along with increase of air pressure in the air guide chamber, and the supporting wheel makes contact with the I-shaped guide rail an