Spray-coating robot with parallel structure

The invention discloses a spray-coating robot with a parallel structure. The spray-coating robot comprises a waist lifting mechanism, a shoulder lifting mechanism, an elbow slewing mechanism, a spray gun slewing mechanism and a rack. According to the spray-coating robot disclosed by the invention, all motors can be installed on the rack, and used for driving the slewing of the waist lifting mechanism, the shoulder lifting mechanism, the elbow slewing mechanism and the spray gun slewing mechanism in a working space by controlling the slewing of double drive rods, a first drive rod, a second drive rod and a spray gun base. Rod pieces can be produced into light rods, thus the spray-coating robot disclosed by the invention is good in the dynamics performances of the mechanisms, stable in performance, good in reliability, and capable of meeting the requirements of high-speed and high-accuracy spray-coating; moreover, the spray-coating robot has the advantages of being large in working space, high in flexibility, convenient to control, simple to machine and reliable in working, is suitable for small common spray-coating work, and can also be used for spray-coating work for large or heavy structures.