Low-vibration roller external step chain and passenger conveying device

The invention discloses a step chain with external low-vibration rollers. The step chain comprises a plurality of rollers and a plurality of damping mechanisms, a roller is fixed at the chain link joint of every multiple chain links, and the rollers are fixed on the side, close to the ladder way guide rail, of the outer part of the chain plate; a damping mechanism is arranged between every two rollers, the damping mechanism is fixed on a middle chain link between the two rollers, the middle chain link refers to the chain link, close to the middle, of a plurality of chain links between the two rollers, and the fixing position of the damping mechanism is the same as that of the rollers; when the passenger conveying device runs, the damping mechanism makes contact with the ladder way guide rail of the passenger conveying device and slides, and the gravity part of the step chain can be supported by the damping mechanism through the ladder way guide rail. Compared with the prior art, the damping ...