Accumulation chain is also called controllable beat conveyor chain. It can realize the chain moving speed unchanged on the support conveyor, and the conveyed objects can control the chain moving beat according to the user's requirements. The structure characteristic of controllable beat conveyor chain is that there are wheels whose diameter is larger than the height of chain plate and whose rotation is flexible. Accumulation chain consists of six parts,
which are inner plate, bushing, roller, wheel, outer plate and pin.