Cushioning mechanism

Abstract

The invention provides a cushioning mechanism comprising a base, an equal-width cam mechanism, a limiting bracket, a ball screw, two groups of energy dissipaters and energy dissipater fixing bases, wherein the equal-width cam mechanism, the limiting bracket, the ball screw, the two groups of energy dissipaters and the energy dissipater fixing bases are mounted on the base. The equal-width cam mechanism comprises a quadrilateral frame and a cam mounted in the quadrilateral frame. The cam is connected with a nut of the ball screw. 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. 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. The invention is low in manufacturing cost and good in buffering and limiting effect.

1 . 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.   
     
     
         2 . The cushioning mechanism according to  claim 1 , wherein said limiting bracket comprises an upper limiting baffle and two side limiting baffles and said upper limiting baffle is fixedly connected between two said side limiting baffles and covers the top of them. 
     
     
         3 . The cushioning mechanism according to  claim 1 , wherein a sliding chute is set up in the middle of said upper limiting baffle; the top of said quadrilateral frame is slidingly connected into said sliding chute. 
     
     
         4 . The cushioning mechanism according to  claim 1 , wherein the two sides of said quadrilateral frame are respectively provided with a first connecting buckle connected with said energy dissipaters. 
     
     
         5 . The cushioning mechanism according to  claim 1 , wherein said cam is clamped between the two nuts and opposite to the reverse side of said cam  23 , two said nuts  11  are respectively mounted with a thrust bearing  12  to support the ball screw  1 . 
     
     
         6 . The cushioning mechanism according to  claim 1 , wherein said base is provided with a plurality of mounting holes. 
     
     
         7 . The cushioning mechanism according to  claim 1 , wherein second connecting buckles are arranged at the top of said energy dissipater fixing bases and said second connecting buckles and the first connecting buckles on the quadrilateral frame are arranged on the same horizontal height. 
     
     
         8 . The cushioning mechanism according to  claim 1 , wherein said side limiting baffles are provided with one or more fixing stiffening ribs for supporting said side limiting baffles.