Ball nut, ball connecting assembly and vehicle

The utility model provides a ball head nut, a ball head connecting assembly and a vehicle, and relates to the technical field of vehicle lamp connecting pieces, the ball head nut is used for connecting a ball head screw and a to-be-connected part, a mounting hole allowing the ball head nut to be inserted is formed in the to-be-connected part, the ball head nut comprises a ball socket part and a limiting part, and the ball socket part is of a hollow cylinder structure with one end open; a base is formed at the end, away from the opening, of the ball socket part. A plurality of cantilevers are circumferentially arranged on the ball socket part. The limiting part comprises a plurality of mounting feet circumferentially arranged on the outer circumferential surface of the ball socket part and a limiting table connected to the cantilever, a ball head of the ball head screw is inserted into the ball socket part, and the mounting feet and the limiting table jointly clamp a part to be connected. The ball nut can be i