The invention relates to a pneumatic spring vibration
isolator of an air flotation type forward and backward swing
concatenation mechanism based on a ball head connecting rod, which belongs to the ultra-precise measurement and
processing field. An inner cylinder is assembled in an outer cylinder of the vibration
isolator, an air bag for an
air spring is sleeved outside the upper end of the inner cylinder, a support rod is arranged in the chamber of the inner cylinder after penetrating through an annular cover plate, and the upper end and the lower end of a
diagonal cable wire are respectively fixed with the annular cover plate and the support rod to form a single swing mechanism; an upper ball seat and a lower ball seat are respectively arranged on the lower end of the support rod and the upper end surface of the
air spring, and the upper end and the lower end of the ball head connecting rod are respectively arranged in the upper ball seat and the lower ball seat to form a reversed swing mechanism; and the single swing mechanism and the reversed swing mechanism form the forward and backward swing
concatenation mechanism. The
air spring is used as a reversed swing spring, and the rigidity of the reversed swing spring can be changed by continuously adjusting the
internal pressure of the air spring, thereby the real time adjustment of the rigidity of the forward and backward swing
concatenation mechanism can be realized to meet requirements of different operating conditions. The pneumatic spring vibration
isolator is introduced by the forward and backward swing concatenation mechanism, which not only enhances the comprehensive
vibration isolation performance of the isolator, but also overcomes many disadvantages of other types of isolators.