CN220447823U - Arched thin-wall anti-collision beam - Google Patents

Abstract

The utility model discloses an arched thin-walled anti-collision beam and a preparation device thereof, which belongs to the technical field related to safety protection. The anti-collision beam is a thin-walled pipe fitting and is arched as a whole, including a straight part and an arched part; the straight part is symmetrically arranged along the tangent direction of both ends of the arched part; a buckling deformation part is provided in the middle of the concave surface of the arched part. The utility model provides an arched thin-walled anti-collision beam and a preparation device thereof. The anti-collision beam is an integral thin-walled pipe fitting, including an arched curved section in the middle and straight sections on both sides. During the three-point bending process, the arched area of the anti-collision beam may undergo local buckling depression or wrinkle deformation, but it still has excellent crashworthiness, and the energy absorption efficiency is even better than that of an anti-collision beam with a perfect central arch section. Under three-point bending load, compared with straight beams of the same material, cross-section and span, the energy absorption efficiency of this anti-collision beam is about 2-3 times higher.

Description

An arched thin-walled anti-collision beam

Technical field

The utility model belongs to the technical field related to safety protection, and more specifically, relates to an arched thin-walled anti-collision beam.

Background technique

In modern transportation and industrial production activities, accidental collisions occur frequently. In order to ensure the safety of people's lives and property in collision accidents, it is necessary to equip corresponding energy-absorbing components to absorb the impact kinetic energy in accidents. Metal thin-walled energy-absorbing components have the advantages of low price, mature processing technology, stable deformation mode, and high energy-absorbing efficiency. They are widely used in the passive safety fields of vehicles, civil engineering, ships, and aerospace. Metal anti-collision beams are currently the most widely used energy-absorbing components.

Under axial impact conditions, thin-walled straight beams undergo progressive buckling deformation and have excellent energy absorption capabilities and efficiency. However, under lateral impact, the thin-walled straight beam mainly undergoes bending deformation, and the energy absorption efficiency is about one order of magnitude lower than that under axial conditions. In order to improve the crashworthiness of thin-walled beams under lateral loads, multi-layer structures, multi-cell structures, gradient structures, etc. are used in the design of automobile bumpers. For example, the patent number is 201610903059.0, which discloses a gradient multi-cell automobile energy-absorbing buffer device in a car bumper buffer structure. By adding a grille buffer structure between the bumper shock-absorbing beam and the bumper outer baffle to improve Energy absorption properties.

Different from the above-mentioned methods of improving the crashworthiness of thin-walled beams under lateral loads, the use of an arched structure can convert lateral external forces into axial forces, thereby significantly improving the crashworthiness of thin-walled beams. The patent number is 202120598342.3, an arch-shaped energy-absorbing protection device. It discloses an arch-shaped energy-absorbing protection device with an arc arch in the middle and straight segments at both ends. It has excellent energy absorption and collision resistance performance. However, the middle section of the device is a perfectly arc-shaped arch and can only be manufactured by casting and other methods, resulting in high production costs.

Utility model content

In view of the above defects or improvement needs of the prior art, the present utility model provides an arched thin-walled anti-collision beam, the purpose of which is to provide a buckling deformation portion in the middle of the concave surface of the arched portion to absorb the energy of the anti-collision beam. The efficiency is better than that of anti-collision beams with perfect central arch sections, and can better meet the actual application requirements of anti-collision beams.

In order to achieve the above object, according to one aspect of the present invention, an arched thin-walled anti-collision beam is provided. The anti-collision beam is a thin-walled pipe fitting and is arched as a whole, including a straight part and an arched part;

The linear portion is symmetrically arranged along the tangent direction of both ends of the arched portion;

A buckling deformation portion is provided in the middle of the concave surface of the arched portion.

Preferably, it also includes end connection portions, which are symmetrically provided at both ends of the linear portion.

Preferably, the interior of the arched portion is filled with porous material.

Preferably, the linear portion is filled with porous material.

Preferably, the linear portion and the arcuate portion have different thicknesses to achieve local thickening of the arcuate portion.

Preferably, the anti-collision beam has a circular or polygonal cross-section.

Preferably, the cross-section of the anti-collision beam is a single-cell structure, a multi-cell structure, or a combination of a single-cell and multi-cell structure.

According to another aspect of the present invention, a preparation device is provided, including a first fixed support member, a second fixed support member and a press head;

The pressure head is arranged above the anti-collision beam, and one end thereof is connected to a driving member;

The first fixed support member and the second fixed support member are symmetrically arranged along the moving direction of the pressure head and located below the anti-collision beam.

Preferably, both the first fixed support member and the second fixed support member are cylindrical structures.

Preferably, the first fixed support and the second fixed support are horizontally movable.

Generally speaking, compared with the existing technology, the above technical solutions conceived by the present utility model can achieve the following beneficial effects:

1. The utility model provides an arched thin-walled anti-collision beam. The anti-collision beam is an integral thin-walled pipe fitting, including an arched curved section in the middle and straight sections on both sides. During the three-point bending process, the arched area of the anti-collision beam may undergo local buckling depression or wrinkle deformation, but it still has excellent crashworthiness, and the energy absorption efficiency is even better than that of an anti-collision beam with a perfect central arch section. Under three-point bending load, compared with straight beams of the same material, cross-section and span, the energy absorption efficiency of this anti-collision beam is about 2-3 times higher;

2. The arched thin-walled anti-collision beam proposed by this utility model has the characteristics of low cost and high efficiency. By controlling the moving displacement of the indenter and the span between the two cylindrical supports in three-point bending, the bending angle of the arched thin-walled anti-collision beam can be controlled. The length and deformation of the central arch section can be changed by controlling the shape and size of the indenter and the span between the cylindrical supports. After three-point bending, cut the end of the arched thin-walled anti-collision beam to obtain the required end size and shape, and then install and fix it on the relevant structure by welding or bolting;

3. The utility model utilizes the deformation of the structure itself to absorb energy and has excellent absorption efficiency. The cross-sectional shape of thin-walled beams can be circular, rectangular or polygonal, and can be in the form of single cell or multi-cell cross-section. The energy absorption efficiency of arched thin-walled anti-collision beams can be further improved by performing three-point bending on metal thin-walled beams filled with porous materials, composite beams with thin-walled pipes nested in each other, or thin-walled straight beams with gradient wall thickness changes. and crashworthiness. Arched anti-collision beams of different forms and sizes can also be combined and designed to obtain anti-collision beams with specific buffer force-displacement response curves.

Description of drawings

Figure 1 is a schematic structural diagram of an arched thin-walled anti-collision beam constructed according to an embodiment of the present utility model;

Figure 2 is a schematic structural diagram of a device for preparing an arched thin-walled anti-collision beam according to an embodiment of the present invention;

Figure 3 is a schematic diagram of preparing arched thin-walled anti-collision beams with different geometric parameters according to the three-point bending method according to an embodiment of the present invention;

Figure 4 is a schematic diagram of the process of preparing an arched thin-walled anti-collision beam according to the three-point bending method according to an embodiment of the present invention. (a) in Figure 4 is a schematic diagram of different cross-sectional shapes of the anti-collision beam. Figure 4 (b) is a schematic diagram of different combinations of anti-collision beams;

Figure 5 is a schematic structural diagram of an arched thin-walled anti-collision beam filled with porous materials according to an embodiment of the present invention;

Figure 6 is a schematic structural diagram of a thickened arched portion constructed according to an embodiment of the present utility model;

Figure 7 is a schematic diagram of the combined design and application of arched thin-walled anti-collision beams of different forms or sizes according to an embodiment of the present invention.

In all drawings, the same reference numerals are used to represent the same elements or structures, where: 1-arched part; 2-straight line part; 3-end connection part; 4-buckling deformation part.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clear, the utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in Figure 1, the utility model proposes an arched thin-walled anti-collision beam, which includes an arched part 1, a straight part 2 and an end connection part 3. The arched portion 1 is located in the middle of the two straight portions 2 . A buckling deformation portion 4 is provided in the middle of the arched portion 1 of the anti-collision beam. The buckling deformation portion 4 is formed during the preparation process. By providing the buckling deformation portion 4, the anti-collision beam has excellent crash resistance and energy absorption. The efficiency is even better than that of a crash beam with a perfect central arch section.

To explain further, the present invention also provides a preparation device, which is used to prepare an arched thin-walled anti-collision beam, including a first fixed support, a second fixed support and an indenter; the indenter is configured Above the anti-collision beam, one end is connected to a driving member; the first fixed support member and the second fixed support member are symmetrically arranged along the moving direction of the pressure head and located below the anti-collision beam.

Further, as shown in Figure 2, the utility model proposes an arched thin-walled anti-collision beam. The preparation process is divided into three steps: first, a metal thin-walled straight beam prepared by extrusion molding and other processes is placed on two The indenter is placed on the cylindrical fixed support, and then the indenter is placed on the upper surface of the straight beam, and the indenter is moved downward to cause the straight beam to bend and deform, thereby obtaining an arched thin-walled beam. Finally, the ends of the arched thin-walled beams are cut as needed to obtain the end size and shape required for practical applications, and the arched thin-walled anti-collision beams are installed and fixed on the actual structure by welding or bolting.

Further explanation, as shown in Figure 3, the bending angle α of the arched thin-walled anti-collision beam according to the present invention can be determined by the movement displacement δ of the indenter and the span between the two cylindrical supports during the preparation process. S control. During the three-point bending process, when S is the same, the larger δ is, the larger the α of the anti-collision beam is; when δ is the same, the larger S is, the smaller the α of the anti-collision beam is. The indenter can be cylindrical or other shapes. The length and deformation of the arch segment are related to, and can be controlled and adjusted by, the shape and size of the indenter.

Further explanation, as shown in Figure 4, the utility model can perform three-point bending preparation of thin-walled straight beams with various cross-sectional shapes or cross-sectional forms. The cross-sectional shape of thin-walled beams can be circular, rectangular or polygonal, and can be in the form of single cell, multi-cell or combined cross-section.

Further explanation, as shown in Figure 5, the utility model can perform three-point bending on metal thin-walled straight beams filled with porous materials, further improving the energy absorption efficiency and crashworthiness of the arched thin-walled anti-collision beam.

Further explanation, as shown in Figure 6, the utility model can perform three-point bending preparation of thin-walled straight beams with local thickness enhancement or thickness gradient changes along the longitudinal direction, further improving the energy absorption efficiency and efficiency of arched thin-walled anti-collision beams. Crashworthiness.

Further explanation, as shown in Figure 7, the present utility model can combine and design arched anti-collision beams of different forms and sizes to obtain an anti-collision beam with a specific buffering force-displacement response curve. The force-displacement response curve with two stages of platform load can be obtained in the figure.

It is easy for those skilled in the art to understand that the above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and modifications made within the spirit and principles of the present invention are Improvements, etc., should be included in the protection scope of this utility model.

Claims (7)

1. An arch thin-wall anti-collision beam is characterized in that the anti-collision beam is a thin-wall pipe fitting and is integrally arch-shaped, and comprises a straight line part (2) and an arch part (1);

the straight line parts (2) are symmetrically arranged along the tangential directions of the two ends of the arch part (1);

the middle part of the concave surface of the arch part (1) is provided with a buckling deformation part (4).

2. An arched thin-walled impact beam according to claim 1, further comprising end connections (3), said end connections (3) being symmetrically disposed at both ends of the straight portion (2).

3. An arched thin-walled impact beam according to claim 1, wherein the arched portion (1) is internally filled with a porous material.

4. An arched thin-walled impact beam according to claim 1, wherein the straight portions (2) are internally filled with porous material.

5. An arched thin-walled impact beam according to claim 1, characterized in that the straight portions (2) are of different thickness than the arched portions (1) to achieve local thickening of the arched portions (1).

6. An arched thin-walled impact beam as claimed in claim 1, wherein the impact beam is circular or polygonal in cross-section.

7. The arched thin-walled impact beam of claim 1, wherein the impact beam has a single cell structure, a multicellular structure, or a combination of single and multicellular structures in cross-section.