Magnesium alloy steel collar adapters

The utility model relates to a magnesium alloy steel ring adapter, the shape of which is concentric circles. The diameter of the inner circle phi 1 is 30-60 mm, the diameter of the outer circle phi 2 is 55-80 mm, and a sunken platform with diameter of phi 3 of 40-70mm and depth L1 of 1-3 mm is arranged. Small circles with diameters phi 4 of 4-8mm are arranged on the two symmetrical sides of the horizontal centric line of the inner circle, the center distance between the two small circles is 65-75mm. Positioning piece installing slots with depth L3 of 1-3mm and width L4 of 8-18mm are arranged on the two small circles. A circle with diameter phi 5 of 3-8mm is arranged on the upper right corner, the center of the circle has an angle alpha of 30-70 degrees with the vertical centric line of the inner circle, a nut installing sunken platform with side line distance L5 of 5-15mm is arranged right under the circle, and the thickness L6 of the sunken platform is 1-4mm. The total thickness L7 of the utility model is 10