Nut feeding device for bolt assembling machine

The utility model relates to a nut feeding device for a bolt assembly machine, which comprises a rack, a material box body mounted on the rack and a conveying part mounted on the left side of the topof the material box body, and is characterized in that a step-by-step feeding mechanism is arranged on the material box body; a through groove is formed in the position, under the step-by-step feedingmechanism, of the material box body. The step-by-step feeding mechanism comprises at least three feeding parts of which the longitudinal heights are sequentially reduced step by step from the left side to the right side; the feeding part comprises a first baffle, a second baffle, a conveying plate, a longitudinal driving air cylinder and a supporting frame. The two sides of the first baffle and the two sides of the second baffle in the width direction are both fixedly connected with the material box body. A transverse gap is formed between the first baffle and the second baffle; the conveyingplate is arranged in the t