Roller shutter driving apparatus

A roller shutter driving apparatus, comprising:

• a shaft fixed to a support frame that is fixed outside one end of a roller shutter winding drum, and inserted into and coaxially arranged with the winding drum;
• a driver arranged inside the winding drum, for driving the winding drum to rotate about the shaft, wherein the driver comprises a base fixed relative to the winding drum in a circumferential direction, and a rotating power member fixed to the base;
• central axes of an output shaft of the rotating power member and the shaft are parallel to each other and have a preset non-zero spacing;
• and
• a two-stage universal joint arranged between the output shaft and the shaft, wherein the two-stage universal joint comprises a transmission shaft, and two universal joint modules respectively set at opposite ends of the transmission shaft;
• external ends of the two universal joint modules are fixedly connected to the output shaft of the rotating power member and the shaft in one-to-one correspondence.