Accumulator conveyors are widely used in four assembly lines, engine assembly lines and vehicle assembly lines of automobile manufacturing industry. The structure of the accumulator type suspension conveyor mainly includes: conveyor track, traction chain, accumulator small car group, drive device, tensioning device, stop device, roller group turning device, optical cycle turning device, switch, stop, gas path control device, etc., can be designed into many layout forms according to needs, can facilitate regional wiring and fast and slow chain transmission.