Buffering and energy absorbing structure

The invention discloses a buffering and energy absorbing structure. The buffering and energy absorbing structure comprises a housing. The buffering and energy absorbing structure is a multi-layer metal grid structure or porous bubble structure filled in the housing; the metal grid structures or porous bubble structures of adjacent layers are lengthways alternatively overlapped in positive and negative poisson ratio; the metal grid structure in the positive poisson ratio is composed of a three-dimensional honeycomb grid structured formed by array type regular hexagonal pore grids; the metal grid structure in the negative poisson ratio is composed of a three-dimensional stretching and expanding grid structure formed by array type concave angle pore grids; the meshes of the porous bubble structure in the positive poisson ratio are of an array type rhombus structure; the meshes of the porous bubble structure in the negative rhombus structure are of an array type four-star shaped structure. Compared with the traditional buffering and energy absorbing structure, the buffering and energy absorbing structure can effectively reduce the peak value of the impact force, so that the whole energy absorbing process is stable, and as a result, the energy absorbing efficiency of the structure can be increased.