Balance motor driving speed reducer for rolling gate

The utility model discloses a transmission decelerating device of a balanced engine for a rolling gate, comprising a direct current electric motor, a decelerating mechanism driven by the electric motor, an output shaft and an outer shell. The formation of the decelerating mechanism is that the front end of the electric motor is fixed with an internal tooth sheath seat along the shaft direction of the electric motor; at least one group of center drive disk is arranged inside the internal tooth sheath seat; the center drive disk is provided with planet decelerating teeth which are symmetrical to each other, and the outer side of each planet decelerating tooth is meshed with the teeth of the internal tooth sheath seat; the shaft end of the electric motor is provided with a center drive tooth, and the inner side of each planet decelerating tooth is simultaneously meshed with the center drive tooth. With the design, the transmission decelerating device has favorable self locking performance and the rolling gate has high reliability; with compact assembly space, small volume, favorable operating stability, one group of the transmission decelerating device can substitute two groups of traditional devices, which greatly reduces the cost of products.