Planet wheel transmission mechanism with floating sun wheel and wheel edge driving structure

The invention relates to the technical field of transmission devices, and discloses a planet gear transmission mechanism with a floating sun gear and a wheel edge driving structure.The planet gear transmission mechanism comprises an inner gear ring, a double-arm planet carrier, the sun gear and a planet gear, and the two ends of the inner gear ring are connected with a first bearing seat and a second bearing seat correspondingly; the double-arm planet carrier comprises an input end side arm extending out of a journal section and an output end side arm extending out of an output shaft section, the journal section is rotationally connected with the first bearing seat, the output shaft section is rotationally connected with the second bearing seat, the sun gear extends out of a sun gear shaft section, the sun gear shaft section is connected with the input shaft through an inner spline sleeve, and a clamping spring is installed in the inner spline sleeve. The maximum gap between the clamping spring and the sun wh