Integrated planetary reducer internally provided with self-locking device

The invention discloses an integrated planetary reducer internally provided with a self-locking device. The integrated planetary reducer comprises a planetary reducer body and the self-locking device. The self-locking device comprises a self-locking frame, a self-locking pin, a self-locking ring, a self-locking inner core and a helical-tooth sun gear; the planetary reducer comprises an input end cover, three helical tooth planetary gears, a small support, a small sun gear, three small planetary gears, a middle support, a large sun gear, three large planetary gears, a large support, an outer sleeve, an output end cover and an output shaft. According to the scientific design, the self-locking device is integrated into the input end of the planetary reducer, and the circular-tube-shaped integrated planetary reducer internally provided with the self-locking device is assembled; the objective problems that in the prior art, assembly is difficult, cracking and clamping are prone to occurring, and the overall appear