Dismounting device applied to speed reducer

The dismounting device applied to the speed reducer comprises a bottom plate, at least three through holes are formed in the bottom plate, a threaded rod penetrates through each through hole and extends to the two sides of the bottom plate, a first nut is arranged at the lower end of each threaded rod, a second nut is arranged at the upper end of each threaded rod, and a jack is installed in the middle of the bottom plate. When the device is used, a threaded rod penetrates through a fixing screw hole in a speed reducer gear, then the threaded rod and a bottom plate are clamped in the mode of screwing a first nut, a jack is fixedly installed in the middle of the bottom plate, the jack corresponds to a bearing in the gear, and then the threaded rod and the gear are clamped in the mode of screwing a second nut. And finally, the bearing is ejected out of the gear by controlling the jack to extend, so that the gear and the bearing in the speed reducer are disassembled, the accessory damagedegree, the accessory mai