Butt joint device for wedge-shaped joint of balance beam of crane

The utility model relates to a wedge-shaped joint butt joint device for a balance beam of a crane, and belongs to the technical field of crane equipment in the metallurgical industry. According to the technical scheme, a connecting rod mechanism (3) comprises two pairs of connecting rods matched with a guide rail (1), the upper ends of the two connecting rods in each pair of connecting rods are rotationally connected with a wedge-shaped connector supporting block (4) and a square connecting block (5) through pin shafts respectively, and one of the lower ends of the two connecting rods in each pair of connecting rods is rotationally connected with the guide rail (1) through a pin shaft; the other connecting rod is in rolling connection with the guide rail (1) through a roller (2); one end of the driving screw rod (6) is fixedly connected to the wedge-shaped joint supporting block (4), and the other end of the driving screw rod (6) is in threaded connection to the square connecting block (5); the wedge-shaped c