Combined air spring system

A combined air spring system, comprising an upper cover plate, an air bag, an upper end plate and a lower end plate, wherein an outer periphery of the upper cover plate is connected with an outer periphery of the upper end plate through the air bag;

• a low-position hourglass elastomer is connected between the upper end plate and the lower end plate;
• a pressing plate is installed at a bottom portion of the upper cover plate;
• a high-position elastomer is connected between the upper cover plate and the pressing plate;
• a limiting table is arranged at a bottom portion of the pressing plate;
• a limiting groove is formed in a top face of the upper end plate;
• the limiting table is located in the limiting groove in a deflated state,
• wherein a center of the low-position hourglass elastomer is provided with an inner cavity penetrating through top and bottom surfaces of the low-position hourglass elastomer, and a top center of the lower end plate is provided with a stop part extending into the inner cavity.