A chassis for very heavy leg of crane

The utility model provides a chassis for very heavy leg of crane, include: base, its lateral wall that is close to the edge are provided with the through -hole, and the edge of base makes progress bending type and becomes the kink, and its upper end becomes backstop portion along radial inside bending type, the first spacing draw -in groove of formation between backstop portion and kink, the base,be used for the slips that is connected with the very heavy leg of crane, the lower extreme edge of slips is formed with limiting convex ring along radial outside the extension, and its lateral wallis the sunken spacing draw -in groove of second that is located the limiting convex ring top that is formed with inwards, and the lower extreme of slips is provided with the screw hole corresponding with the through -hole, limiting convex ring inserts and establishes in first spacing draw -in groove, and backstop portion inlays and establishes in the spacing draw -in groove of second, wears to beequipped with fastening bol