Spraying or paint spraying integrated production conveying line for structural parts

The utility model provides a structural part spraying or paint spraying integrated production conveying line which comprises a plurality of linear rail systems, at least one turnout rail system, a loading self-propelled trolley, a current collector, a safety sliding contact line, an auxiliary beam and a hanging device. A hanging bracket used for fixing the linear track system and the turnout track system is arranged below the auxiliary beam, and the loading self-propelled trolley is connected with the fixed linear track system and the turnout track system in a sliding mode, can slide along the fixed linear track system and the turnout track system and is electrically connected with a safety sliding contact line located on one side of the linear track system and the turnout track system. The integrated production conveying line is formed by splicing the standardized linear track system and the turnout track system, free splicing can be conducted according to the requirements of factory machining procedures, tr