Rolling door driving device

Abstract The present disclosure illustrates an extra rolling door driving device includes a chainring, a drive block, and an electric machine assembly. The chainring includes at least two partial chainrings which can be assembled with each other, and an avoidance groove configured to avoid a shaft of a rolling door assembly to be assembled, so that the chainring is assembled with the rolling door assembly in a radial direction of the shaft. The drive block includes an end combined with the assembly plate of the chainring, and other end configured to combine with a door leaf of the rolling door assembly. A driving gear is engaged with the gear of the chainring, and the electric machine assembly drives rotation of the chainring through the driving gear, so that the chainring is able to drive the door leaf of the rolling door assembly to roll. --4 -I-4 (L0 0 N%) cA ) -4 01: N