Energy absorption structure and automobile

Abstract

The utility model provides an energy absorption structure and an automobile, and relates to the technical field of automobile anti-collision energy absorption, the energy absorption structure comprises at least two energy absorption bodies, the energy absorption bodies are hollow structures, and the at least two energy absorption bodies are connected end to end in sequence; the filling layers are arranged between the adjacent energy absorption bodies; the connecting layer wraps the ends, close to each other, of the adjacent energy absorption bodies, the adjacent energy absorption bodies are connected with each other, and the filling layer is wrapped in the connecting layer; the problems that in the prior art, an energy absorption structure is of an integrated metal plate or profile structure, and the energy absorption effect is limited are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile anti-collision energy absorption, and more specifically, relates to an energy absorption structure and an automobile. Background Art

[0002] With the increasing annual vehicle ownership, people's demand for vehicle collision safety is also getting higher and higher. The energy absorption structure is an important protection unit when a vehicle collides. How to design a reasonable energy absorption structure to not only meet the protection of the vehicle itself but also cause no major damage to the other party is an important concern and development direction in vehicle design and development.

[0003] According to the requirements of collision regulations, when a vehicle collides, it should have excellent strength and stiffness to ensure that the engine compartment does not undergo significant deformation; it should also have a good energy absorption structure and collapse space to offset the huge energy brought by the collision; at the same time, the strength should not be too high to cause no huge damage to the vehicle or pedestrians of the other party. The above requirements are contradictory. The existing method is to make compromises in various working conditions and select an energy absorption mode that can meet as many collision scenarios as possible, but it cannot meet the requirements of various working conditions to the greatest extent.

[0004] The energy absorption structure in the prior art is an integral sheet metal or profile structure, which only collapses and absorbs energy during high-speed collisions to protect vehicle safety, but lacks protection for external pedestrians and vehicles of the other party. Summary of the Utility Model

[0005] The purpose of the utility model is to address the deficiencies in the prior art and provide an energy absorption structure and an automobile to solve the problem that the energy absorption structure in the prior art is an integral sheet metal or profile structure with limited energy absorption effect.

[0006] To achieve the above purpose, the utility model provides an energy absorption structure, including:

[0007] At least two energy absorbers, the energy absorbers are of a hollow structure, and at least two of the energy absorbers are arranged in sequence end to end;

[0008] A filling layer, the filling layer is arranged between adjacent energy absorbers;

[0009] A connection layer, the connection layer wraps around one end of adjacent energy absorbers close to each other, so that the adjacent energy absorbers are connected to each other and wrap the filling layer inside.

[0010] Optionally, the cross-section of the energy absorber is in the shape of a Chinese character 'Ri', 'Mu', 'Tian' or 'Ao'.

[0011] Optionally, the material of the energy absorber is a fiber-reinforced composite material.

[0012] Optionally, at least two of the energy absorbing bodies have the same wall thickness, or the wall thickness of the energy absorbing body at the front end of the energy absorbing structure is thinner than the wall thickness of the energy absorbing body at the rear thereof.

[0013] Optionally, the wall thickness of the energy absorbing body at the front end of the energy absorbing structure is 0.1-1 mm thinner than the wall thickness of the energy absorbing body at the rear thereof.

[0014] Optionally, the filling layer is in a plate shape.

[0015] Optionally, the material of the filling layer is a fiber-reinforced composite material sheet.

[0016] Optionally, the filling layer has a thickness of 1-5 mm.

[0017] Optionally, the material of the connecting layer is structural adhesive or glass fiber reinforced resin injection molding material.

[0018] The utility model also provides a car, comprising:

[0019] A vehicle body, wherein an anti-collision beam is provided at the front end of the vehicle body;

[0020] The energy absorbing structure mentioned above has a front end and a rear end connected to the anti-collision beam and the vehicle body respectively.

[0021] The utility model provides an energy absorbing structure and a car, the beneficial effects of which are: the energy absorbing structure has at least two energy absorbing bodies, adjacent energy absorbing bodies are connected by wrapping a connecting layer, and a filling layer is arranged between adjacent energy absorbing bodies, which can form a multi-stage energy absorbing effect and improve the energy absorbing performance of the car during a collision.

[0022] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0024] Figure 1 A schematic diagram of an energy absorbing structure according to an embodiment of the utility model is shown.

[0025] Figure 2 A partial schematic diagram of an energy absorbing structure according to an embodiment of the utility model is shown.

[0026] Figure 3 A schematic diagram of an energy absorbing body of an energy absorbing structure according to an embodiment of the utility model is shown.

[0027] Figure 4 Shows a schematic diagram of a filling layer of an energy absorption structure according to an embodiment of the present invention.

[0028] Figure 5 Shows a schematic diagram of a connection layer of an energy absorption structure according to an embodiment of the present invention.

[0029] Explanation of reference numerals:

[0030] 1, energy absorber; 2, filling layer; 3, connection layer. Detailed implementation manners

[0031] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention will be more thorough and complete, and can fully convey the scope of the present invention to those skilled in the art.

[0032] As Figures 1 to 5 shown, the present invention provides an energy absorption structure, including:

[0033] At least two energy absorbers 1, the energy absorber 1 is a hollow structure, and at least two energy absorbers 1 are arranged in sequence with their heads and tails connected;

[0034] Filling layer 2, the filling layer 2 is arranged between adjacent energy absorbers 1;

[0035] Connection layer 3, the connection layer 3 wraps around one end of adjacent energy absorbers 1 that are close to each other, so that the adjacent energy absorbers 1 are connected to each other, and the filling layer 2 is wrapped inside it.

[0036] Specifically, to solve the problem that the energy absorption structure in the prior art is an integral sheet metal or profile structure and the energy absorption effect is limited; the energy absorption structure provided by the present invention has at least two energy absorbers 1, the adjacent energy absorbers 1 are connected by the wrapping of the connection layer 3, and a filling layer 2 is arranged between the adjacent energy absorbers 1, which can form a multi-segment energy absorption effect and improve the energy absorption performance during vehicle collision.

[0037] Optionally, the cross-section of the energy absorber 1 is in the shape of a Chinese character 'Ri', 'Mu', 'Tian' or 'Ao'.

[0038] Specifically, the energy absorber 1 can be obtained by cutting a hollow tubular energy absorption preform made by a pultrusion process. The cross-section of the energy absorption preform can be in the shape of a Chinese character 'Ri','Mu', 'Tian', 'Ao'. By using the pultrusion process, it can be processed into any length, and has the advantages of low die cost and high forming efficiency.

[0039] Optionally, the material of the energy absorbing body 1 is a fiber-reinforced composite material.

[0040] Specifically, the energy absorber 1 and the energy absorber preform can be made of fiber reinforced composite materials. The matrix of the fiber reinforced composite materials can adopt degradable thermosetting resins. Compared with traditional thermosetting resins, degradable thermosetting resins can be degraded and reused under certain conditions by setting certain cleavable bonds in the cross-linked network in the molecular chain, and have better recyclability. Compared with thermoplastic resins, degradable thermosetting resins have better thermal stability and better performance, and can better meet the performance requirements and electrophoresis requirements of automotive parts.

[0041] Furthermore, the degradable thermosetting resin is an epoxy resin or polyurethane containing functional groups such as borate bonds, acetal bonds, Schiff bases, tertiary ester bonds, etc.; the reinforcing material of the fiber-reinforced composite material can be one or more of carbon fiber, glass fiber, aramid fiber, and ultra-high molecular weight polyethylene fiber, and the fiber can be in the form of unidirectional tape or fabric; such fiber-reinforced composite materials are existing materials and can be purchased or ordered as needed, and using such materials to make energy-absorbing preforms through a pultrusion process, and then cutting the energy-absorbing preforms to obtain the energy-absorbing body 1 is also an existing conventional process.

[0042] Optionally, at least two energy absorbing bodies 1 have the same wall thickness, or the wall thickness of the energy absorbing body 1 at the front end of the energy absorbing structure is thinner than the wall thickness of the energy absorbing body 1 at the rear end thereof.

[0043] Specifically, the energy-absorbing preform is cut into energy-absorbing bodies 1 according to the required size, and the length of each energy-absorbing body 1 can be determined as needed; in the present embodiment, the energy-absorbing structure is formed by splicing 2 to 3 sections of energy-absorbing bodies 1, and each energy-absorbing body 1 has the same cross-sectional shape, and the thickness of the rear section is the same as that of the front section, or the thickness of the rear section is thicker than that of the front section.

[0044] Optionally, the wall thickness of the energy absorbing body 1 at the front end of the energy absorbing structure is 0.1-1 mm thinner than the wall thickness of the energy absorbing body 1 at the rear end thereof.

[0045] Specifically, the thickness of the energy absorbing body 1 at the rear end is 0.1-1 mm thicker than that of the energy absorbing body 1 at the front end, so that a layered collapse can be formed during the collision collapse energy absorption process, thereby improving the energy absorption effect.

[0046] In one embodiment, the size of each section of the energy absorbing body 1 is: L1=40%L~60%L; L2=10%L~20%L; L3=15%L~20%L; L4=15%L~20%L; wherein L2 and L4 can be combined with L1 and L3 respectively; wherein L1~L4 are the lengths of the energy absorbing body 11~energy absorbing body 14, and L is the overall length of the energy absorbing structure.

[0047] Optionally, the filling layer 2 is in a plate shape.

[0048] Specifically, the plate-shaped filling layer 2 is sandwiched between two energy absorbing bodies 1 .

[0049] Optionally, the material of the filling layer 2 is a fiber-reinforced composite material sheet.

[0050] Specifically, the filling layer 2 is a fiber-reinforced composite material sheet, and the reinforcing fiber in the sheet can be one or more of carbon fiber, glass fiber, aramid fiber, and ultra-high molecular weight polyethylene fiber, and the fiber can be in the form of unidirectional tape or fabric; the resin matrix in the sheet is a non-Newtonian fluid material, wherein the dispersed phase is one or more of silica, polystyrene, polymethyl methacrylate, and calcium carbonate; the dispersion medium is one or more of polyethylene glycol, vinyl alcohol, water, and saline solution; the non-Newtonian fluid used in the energy-absorbing layer can completely adopt the existing material system, and such a material system can be directly purchased or ordered.

[0051] Optionally, the thickness of the filling layer 2 is 1-5 mm.

[0052] Specifically, the thickness of the filling layer 2 is 1 to 5 mm, preferably 2 to 4 mm.

[0053] Furthermore, the area of ​​the filling layer 2 is smaller than the cross-sectional area of ​​the energy absorbing body 1, and the single-side dimension is smaller by 0.1 to 1 mm.

[0054] Specifically, in this case, two ends of the connection layer 3 respectively wrap around two adjacent energy absorbing bodies 1 , and a ring-shaped inward convex portion is formed in the middle of the connection layer 3 , and the convex portion is in contact with the filling layer 2 .

[0055] Optionally, the material of the connection layer 3 is structural adhesive or glass fiber reinforced resin injection molding material.

[0056] Specifically, the filling layer 2 and the adjacent energy absorbing body 1 are connected together through the connecting layer 3. The connecting layer 3 can be a structural adhesive or a glass fiber reinforced resin injection molding material. The structural adhesive can be sprayed onto the surface of the filling layer 2 and the energy absorbing body 1 by automatic spraying, and the spraying width of the structural adhesive can be set to 4 to 10 mm; the glass fiber reinforced resin injection molding material can be injection molded by local injection molding, and the injection molding width is 4 to 10 mm, wherein the resin material can be a thermoplastic resin such as PP and PA.

[0057] In this embodiment, a degradable thermosetting composite pultruded profile is used to make the energy absorber 1. The material itself has the high performance and stability of thermosetting resins and the easy recycling of thermoplastic resins. Compared with metal structures, it is lighter and has no risk of rust. It has the characteristics of light weight, high strength, easy recycling, and corrosion resistance. Compared with traditional solutions, it can reduce weight by 10 to 30%; the safety of the non-deformable area in the rear section can be ensured by the differential design of size and thickness; the filling layer 2 is made of non-Newtonian fluid material, which has good elasticity and good energy absorption effect in low-speed collisions, and can effectively protect pedestrians and oncoming vehicles; in high-speed collisions, it shows high rigidity, which can protect the passenger compartment and the non-deformable area and improve safety performance; the filling layer 2 is slightly smaller than the energy absorber 1, and the structure can better guide the energy; the energy absorption structure body and the filling layer 2 are organically connected together by structural adhesive or local injection molding, realizing a soft and hard energy absorption structure.

[0058] The utility model also provides a car, comprising:

[0059] The vehicle body, the front end of which is provided with an anti-collision beam;

[0060] The energy absorbing structure mentioned above has a front end and a rear end connected to the anti-collision beam and the vehicle body respectively.

[0061] Specifically, the energy absorbing structure is arranged behind the anti-collision beam of the automobile. When a collision occurs, the energy absorbing structure can collapse better to optimize the energy absorbing effect.

[0062] The various embodiments of the utility model have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. An energy absorbing structure, characterized in that: Comprising: At least two energy absorbers, the energy absorbers being of a hollow structure, and at least two of the energy absorbers being arranged in sequence with their heads and tails connected; A filling layer, the filling layer being arranged between adjacent ones of the energy absorbers; A connecting layer, the connecting layer being wrapped around one end of adjacent ones of the energy absorbers that are close to each other, so that the adjacent energy absorbers are connected to each other, and the filling layer is wrapped inside it.

2. The energy absorbing structure according to claim 1, characterized in that: The cross-section of the energy absorber is in the shape of a Chinese character 'Ri', 'Mu', 'Tian' or 'Ao'.

3. The energy absorbing structure according to claim 1, characterized in that: The material of the energy absorber is a fiber-reinforced composite material.

4. The energy absorbing structure according to claim 1, characterized in that: The wall thicknesses of at least two of the energy absorbers are the same, or the wall thickness of the energy absorber at the front end of the energy absorption structure is thinner than the wall thicknesses of the energy absorbers behind it.

5. The energy absorbing structure according to claim 4, characterized in that: The wall thickness of the energy absorber at the front end of the energy absorption structure is 0.1 - 1 mm thinner than the wall thicknesses of the energy absorbers behind it.

6. The energy absorbing structure according to claim 1, characterized in that: The filling layer is plate-shaped.

7. The energy absorbing structure according to claim 1, characterized in that: The material of the filling layer is a fiber-reinforced composite material sheet.

8. The energy absorbing structure according to claim 1, characterized in that: The thickness of the filling layer is 1 - 5 mm.

9. The energy absorbing structure according to claim 1, characterized in that: The material of the connecting layer is a structural adhesive or a glass fiber reinforced resin injection molding material.

10. An automobile, characterized in that: Comprising: A vehicle body, a bumper beam being arranged at the front end of the vehicle body; The energy absorption structure according to any one of claims 1 - 9, the front end and the rear end of the energy absorption structure being connected to the bumper beam and the vehicle body respectively.

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