Cushioning mechanism

A cushioning mechanism comprises:

• a base;
• an equal-width cam mechanism, a limiting bracket, a ball screw, two groups of energy dissipaters and energy dissipater fixing bases mounted on the base,
• wherein the equal-width cam mechanism comprises a quadrilateral frame and a cam mounted in the quadrilateral frame,
• wherein the cam is connected with a nut of the ball screw;
• wherein the two groups of energy dissipaters are mounted on the energy dissipater fixing bases on the two sides of the equal-width cam mechanism separately and the ends, away from the energy dissipater fixing bases, of the two groups of energy dissipaters are connected with the two sides of the quadrilateral frame separately;
• wherein the limiting bracket is mounted on the periphery of the equal-width cam mechanism and the cam mechanism performs linear reciprocating motions between the two groups of energy dissipaters under the limit of the limiting bracket;
• wherein the end, away from the equal-width cam mechanism, of the ball screw is provided with a spring latch assembly used for being connected with a building structure or a bridge structure,
• wherein said spring latch assembly comprises a spring latch and a latch shell,
• wherein said latch shell is movably sleeved outside the spring latch, and bolt holes which are matched with the spring latch is mounted in the two sides of said latch shell.