A hub paint spraying equipment equipped with a spraying robot having a combined spray gun, comprising a control system, a wheel type recognition system, a brace recognition system, a paint supply device, a quick color changing device, the spraying robot, the combined spray gun, a cleaning system, a conveying chain and an accessory device, wherein the conveying chain comprises a chain, braces and a driving mechanism, the braces being arranged on the chain,
- wherein the wheel type recognition system, the brace recognition system, the paint supply device, the quick color changing device, the spraying robot, the combined spray gun, the cleaning system and the conveying chain are controlled by the control system,
- wherein the cleaning system is arranged on the quick color changing device, the combined spray gun and a paint feeding pipe disposed between the quick color changing device and the combined spray gun,
- wherein a main body of the hub paint spraying equipment is arranged in a spraying isolation area, a spray room being provided in the spraying isolation area, the spraying robot being arranged in the spray room, the wheel type recognition system being arranged in front of an entrance of the spraying isolation area, the brace recognition system comprising read-write tags arranged below each brace and tag read-write devices arranged at the wheel type recognition system and entrances of the spray room, and the wheel type recognition system and the tag read-write devices being connected with the control system;
- the combined spray gun being installed at a top of the spraying robot and formed by fixedly installing a plurality of spray gun individuals together, the relative positions of the spray gun individuals being fixed, the paint supply device being connected with the corresponding spray gun individuals via paint supply pipelines independent from each other according to categories of colored paints, the quick color changing device being arranged on the paint supply pipelines, and the paint supply device and the quick color changing device being connected with the control system.