Wheel-side speed reducer assembly

The utility model discloses a hub reduction gear assembly which is mainly used for manufacturing pure electric vehicles. The driving gear shaft and the driven gear shaft are coaxially arranged, the driving gear shaft, the planet gear and the planet carrier are installed in the driven gear shaft, and the driving gear shaft is connected with the speed reducer end cover and the planet carrier throughthe driving inner bearing and the driving outer bearing respectively. The planet wheel is arranged on the planet shaft, and is respectively connected with the planet carrier and the speed reducer endcover on the end surface through the planet inner bearing and the planet outer bearing; the interior of the driven gear shaft is connected with the planet carrier through a planet carrier bearing, and the outer circle part is connected with the hub shaft tube and the brake bottom plate through a driven outer bearing and a driven inner bearing in a matched mode; the driving gear shaft is externally meshed with the planet w