Rubber spring and design method thereof

The invention discloses a rubber spring and a design method thereof. The rubber spring comprises an upper metal plate, a lower metal plate and a rubber layer vulcanized between the upper metal plate and the lower metal plate. The circumferential outer molded surface of the rubber layer comprises a restraint ring molded surface and axial rigidity limiting ring molded surfaces, wherein the restraintring molded surface is used for restraining radial bulging of the rubber layer so that the radial bulging of the rubber layer within a normal load range cannot exceed the edge of the upper metal plate and the edge of the lower metal plate, and the axial rigidity limiting ring molded surfaces are used for limiting the axial rigidity of the rubber layer and arranged at the two ends of the restraintring molded surface. The technical problem that after vertical deformation or horizontal deformation, a hourglass spring bulges greatly in the radial direction and is easy to interfere with surrounding equipment is solved, th