Connection and conversion device for grab bucket

The utility model relates to a connection and conversion device for a grab bucket, and is characterized in that the conversion device comprises a conversion body made of a steel plate, wherein three reinforcing sleeves made of round steel are welded on the conversion body; each reinforcing sleeve comprises a conversion hole penetrating the conversion body; the three conversion holes are distributed on the conversion body; and the connection lines of the three conversion holes form an isosceles triangle. Through the adoption of the conversion device, influence on a gantry crane from the factors such as cargo weight, work environment or the like is reduced; and the working performance of the gantry crane is improved. Moreover, the connection and conversion device also has the advantages of simple structure, easiness in processing and manufacture, and convenience in use.