Disassembling and assembling device for disassembling and assembling shaft and bearing

The utility model discloses a dismounting and mounting device for dismounting and mounting a shaft and a bearing, and belongs to the technical field of bearing dismounting and mounting tools. The device comprises a top stopping structure I; the second top stopping structure is arranged right opposite to the first top stopping structure, and a limiting through groove is formed in the second top stopping structure right opposite to the first top stopping structure; the number of the double-thread screw sets is at least one, each double-thread screw set comprises two double-thread screws arranged in parallel, the double-thread screws are connected between the first top stopping structure and the second top stopping structure, and a mounting cavity is formed among the double-thread screw sets, the first top stopping structure and the second top stopping structure; the jack is mounted in the mounting cavity, the jack is provided with a top stop part and a movable top push rod, the top stop part abuts against the f