The invention relates to the field of
assembly line equipment and specifically relates to an
elbow for a closed-loop
assembly line. The
elbow comprises a panel and a connecting plate arranged at one end of the panel; a
synchronizing module is arranged on the connecting plate; an
elbow guide rail is arranged on the panel; a carrying through hole is formed on the inner side of the elbow guide rail on the panel and a belt carrying module is arranged in the carrying through hole; a
wheel train main shaft for driving a belt is arranged in the belt carrying module; the
synchronizing module is in transmission connection with one end of the
wheel train main shaft by use of a universal
coupling. The size of the elbow for the closed-loop
assembly line can be changed according to the shapes of the linear conveyor belts and is capable of adapting to connection with different open-loop conveyor belts; the power of the elbow
conveyor belt is provided by the
synchronizing wheel of the open-loop
conveyor belt, and therefore, the space of the motor and the
conveyor belt is saved and the consistency of the speed at the elbow and the speed of the linear conveyor belt is guaranteed; the
frontage of the panel is powered by a rubber wheel and a carrying belt, the guide rail is used for guiding and a universal ball is used for reducing friction, and consequently, the power of the movement of a tray is guaranteed sufficiently and the tray is prevented from moving away from the rail.