CN109624900B

CN109624900B - Automobile collision energy absorption box

Info

Publication number: CN109624900B
Application number: CN201811534231.5A
Authority: CN
Inventors: 黄文臻; 张勇; 李吉祥; 陆勇; 余龙
Original assignee: Huaqiao University
Current assignee: Huaqiao University
Priority date: 2018-12-14
Filing date: 2018-12-14
Publication date: 2021-10-01
Anticipated expiration: 2038-12-14
Also published as: CN109624900A

Abstract

The invention provides an automobile collision energy absorption box, which comprises an upper flange plate, a composite shell, internal fillers, a circular truncated cone inner tube and a lower flange plate, wherein the upper flange plate is provided with a plurality of holes; the upper part of the composite shell is a square box, and each side surface of the square box is provided with five defect holes along a diagonal line; the lower part of the composite shell is a table corrugated pipe, and the side edge of the table corrugated pipe is of a sinusoidal corrugated structure; the circular truncated cone inner tube is arranged in the composite shell, and the internal filler is filled between the circular truncated cone inner tube and the inner wall of the composite shell; the filler between the square box and the circular truncated cone inner tube is of a honeycomb structure, and the filler between the table corrugated tube and the circular truncated cone inner tube is of a lattice structure. The automobile energy absorption box is high in energy absorption stability and good in energy absorption effect.

Description

Automobile collision energy absorption box

Technical Field

The invention relates to a novel automobile collision energy absorption box device, belonging to the field of automobile passive safety protection.

Background

With the continuous development of the automobile industry, automobiles become indispensable transportation tools for daily trips of people, but the traffic accidents are frequent due to the increase of the number of the automobiles, so that huge loss of people and property is caused. Automobile safety has become a significant issue that we cannot neglect. The automobile energy absorption box is an energy absorption device arranged between an automobile cross beam and a frame longitudinal beam, and is required to absorb impact energy and reduce peak stress through self-collapsing deformation after impact occurs, so that the automobile longitudinal beam and even a cab are protected from being damaged, automobile maintenance cost is reduced, and automobile safety is improved.

The traditional energy absorption box can not meet the requirement of the current automobile safety due to insufficient or unstable energy absorption, so that the designed automobile energy absorption box with the high-efficiency and stable porous structure has very important practical significance and practical value.

Disclosure of Invention

The invention aims to provide an automobile energy absorption box which is high in energy absorption stability and good in energy absorption effect.

In order to solve the problems, the invention provides an automobile collision energy absorption box which comprises an upper flange plate, a composite shell, internal fillers, a circular truncated cone inner pipe and a lower flange plate, wherein the upper flange plate is provided with a flange plate;

the upper part of the composite shell is a square box, and each side surface of the square box is provided with five defect holes along a diagonal line; the lower part of the composite shell is a table corrugated pipe, and the side edge of the table corrugated pipe is of a sinusoidal corrugated structure;

the circular truncated cone inner tube is arranged in the composite shell, and the internal filler is filled between the circular truncated cone inner tube and the inner wall of the composite shell; the filler between the square box and the circular truncated cone inner tube is of a honeycomb structure, and the filler between the table corrugated tube and the circular truncated cone inner tube is of a lattice structure.

In a preferred embodiment: the honeycomb structure takes hexagons as corner units and takes quadrangles, hexagons and alternate arrangements of the quadrangles as side units.

In a preferred embodiment: the lattice structure is composed of a unit cell array, and the unit cell is composed of triangular prism core subunits through a rotation array; the triangular prism core subunit is formed in a manner that each face of the triangular prism retains a diagonal line.

In a preferred embodiment: the composite shell is of a sandwich structure consisting of an upper carbon fiber layer, a middle aluminum fiber layer and a lower carbon fiber layer; the carbon fibers in the upper carbon fiber layer, the middle aluminum fiber layer and the lower carbon fiber layer sequentially form an included angle of 30 degrees.

In a preferred embodiment: the defect hole is an elliptical defect hole.

Compared with the prior art, the invention has the beneficial effects that:

1. the energy absorption is efficient, stable and gradual.

The invention provides an automobile collision energy absorption box, wherein fillers between a square box and a circular truncated cone inner tube adopt a honeycomb structure which takes hexagons as corner units and takes quadrilateral, hexagonal and quadrilateral alternate arrangement as side units, and fillers between a table corrugated tube and the circular truncated cone inner tube adopt a lattice structure which takes a triangular-prism-shaped core cell body as a unit; in the collision process, the upper box honeycomb filler deforms through folds to absorb part of energy and is primary energy absorption, the lower box lattice structure filler obviously improves the energy absorption effect through the self elastic deformation, yield deformation and compact process and is secondary energy absorption, and the design can realize the effect of gradual energy absorption. Especially when high-speed collision happens, the energy absorption stability can be effectively guaranteed while the total energy absorption is improved, and the safety of passengers in the vehicle is guaranteed.

2. The buffering device has the advantages that good buffering is provided, peak collision force is effectively reduced, and personnel safety is guaranteed.

According to the automobile collision energy absorption box provided by the invention, the composite fiber structure formed by carbon fibers and aluminum fibers is used as a shell material, the composite fiber structure has a good buffering effect with a honeycomb structure design in the upper box, the box surface of the upper box is provided with the oval defect hole, and the peak stress can be effectively reduced with the corrugated structure of the lower box in the collision process.

3. The impact device is suitable for multi-angle impact.

According to the automobile collision energy absorption box provided by the invention, the shell is made of composite fiber materials arranged at different angles, so that the mechanical advantages of the carbon-aluminum material can be exerted, the mechanical properties in different directions can be enhanced, and the lower box of the energy absorption box and the inner circular truncated cone pipe have certain conicity and can effectively resist the generation of mechanical instability under angular impact by matching with the lattice structure filler in contact with the inner surface. In addition, the honeycomb filling design of the upper box has better stability compared with the traditional honeycomb structure.

Drawings

FIG. 1 is an exploded view of an automotive crash box in accordance with a preferred embodiment of the present invention;

FIG. 2 is a schematic view of an automotive crash box in accordance with a preferred embodiment of the present invention.

FIG. 3 is a schematic view of a composite shell in a preferred embodiment of the invention;

FIG. 4 is a schematic view of the arrangement of carbon fibers in a composite skin in accordance with a preferred embodiment of the present invention;

FIG. 5 is a schematic illustration of a filler in a preferred embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a honeycomb structure in a preferred embodiment of the invention;

FIG. 7 is a schematic diagram of the manner in which a lattice structure is obtained in a preferred embodiment of the present invention;

FIG. 8 is a schematic diagram of a lattice structure in a preferred embodiment of the present invention;

Detailed Description

The invention is described in detail below with reference to the accompanying drawings and examples. It should be noted that: the following examples are only for illustrating the present invention and are not intended to limit the technical solutions described in the present invention, and all technical solutions and modifications thereof that do not depart from the scope of the present invention should be included in the scope of the claims of the present invention.

The invention provides a novel automobile energy absorption box with high energy absorption stability and good energy absorption effect, aiming at solving the problems of insufficient energy absorption effect, poor energy absorption stability, incapability of absorbing energy from multiple angles and the like of the traditional energy absorption box.

The overall structure of the automobile crash energy absorption box is shown in fig. 1 and fig. 2, and comprises an upper flange plate 101, a composite outer shell 102, an inner filler 103, a circular truncated cone inner tube 104 and a lower flange plate 105.

The composite shell 102 is arranged between the upper flange plate 101 and the lower flange plate 105 and is respectively and fixedly connected with the upper flange plate and the lower flange plate; the circular truncated cone inner tube 104 is arranged in the composite shell 102 and is coaxial with the composite shell 102; the inner filler 103 is filled between the frustoconical inner tube 104 and the inner wall of the composite outer shell 102.

With further reference to fig. 3, the upper portion of the composite shell 102 is a square box 201, and each side of the square box 201 is provided with five elliptical defect holes 203 along the diagonal; the lower part of the composite shell 102 is a table body corrugated pipe 202, and the side edges of the table body corrugated pipe 202 are of a sine corrugated structure 204, so that peak collision force can be effectively reduced.

The shell material of the composite shell 102 is as shown in fig. 4, and adopts a sandwich structure of an upper carbon fiber layer 301, a middle aluminum fiber layer 302 and a lower carbon fiber layer 303, wherein the arrangement of the fiber layers is as shown in fig. 4, carbon fibers of the upper carbon fiber layer 301, the middle aluminum fiber layer 302 and the lower carbon fiber layer 303 respectively form an included angle of 30 degrees, that is, the carbon fibers of the upper carbon fiber layer 301, the middle aluminum fiber layer 302 and the lower carbon fiber layer 303 sequentially rotate by 30 degrees from top to bottom.

The filler 103 between the composite outer shell 102 and the circular truncated cone inner tube 104 is shown in fig. 5, wherein the filler between the square outer shell 201 and the circular truncated cone inner tube 102 is in a honeycomb structure 401, and the filler between the circular truncated cone corrugated tube 202 and the circular truncated cone inner tube is in a lattice structure 402.

The honeycomb structure 401 has a cross section 501 shown in fig. 6, in which hexagonal cells are used as corner cells, and tetragonal cells, hexagonal cells, and tetragonal cells are arranged alternately.

The lattice structure 402 is shown in fig. 8, which is obtained in such a manner that, as shown in fig. 7, a triangular prism core subunit 602 is constituted by each face of a triangular prism 601 with a diagonal line left, and a unit cell 603 is constituted by rotating the array. The cell bodies 603 are arranged in an array to form a lattice structure 402.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and variations or technical scopes disclosed by the present invention can be easily conceived by those skilled in the art. Alternatives are intended to be included within the scope of the invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.

Claims

1. An automobile collision energy absorption box is characterized by comprising an upper flange plate, a composite shell, internal fillers, a circular truncated cone inner tube and a lower flange plate;

the circular truncated cone inner tube is arranged in the composite shell, and the internal filler is filled between the circular truncated cone inner tube and the inner wall of the composite shell; the filler between the square box and the circular truncated cone inner tube is of a honeycomb structure, and the filler between the table corrugated tube and the circular truncated cone inner tube is of a lattice structure;

the honeycomb structure takes hexagons as corner units and takes quadrangles, hexagons and alternate arrangements of the quadrangles as side units;

the lattice structure is composed of a unit cell array, and the unit cell is composed of triangular prism core subunits through a rotation array; the triangular prism core subunit is formed in a mode that each surface of a triangular prism keeps a diagonal line;

the composite shell is of a sandwich structure consisting of an upper carbon fiber layer, a middle aluminum fiber layer and a lower carbon fiber layer; the carbon fibers in the upper carbon fiber layer, the middle aluminum fiber layer and the lower carbon fiber layer sequentially form an included angle of 30 degrees.

2. The automobile crash box according to claim 1, wherein: the defect hole is an elliptical defect hole.