CN107972617B - Performance-adjustable automobile collision energy absorbing device - Google Patents

Abstract

The invention discloses an automobile collision energy-absorbing device with adjustable performance, which comprises a flange (1) used for the detachable fixed connection of the anti-collision beam, and a bottom absorber fixedly connected to the flange (1). An energy-absorbing box (2) and an upper energy-absorbing box (3), wherein the lower part of the upper energy-absorbing box (3) is detachably plugged into the upper part of the lower energy-absorbing box (2). The performance-adjustable automobile collision energy-absorbing device of the present invention has high energy-absorbing efficiency, can realize multi-level graded collapse, adjustable energy-absorbing performance, easy standardization of parts, and recyclable parts.

Description

Energy-absorbing device for automobile collision with adjustable performance

technical field

The invention belongs to the technical field of vehicle anti-collision energy-absorbing devices, in particular to a performance-adjustable automobile collision energy-absorbing device with high energy absorption efficiency and easy recycling of components.

Background technique

Automotive energy-absorbing devices are an essential part of automotive passive safety design, and they usually have different energy-absorbing characteristics due to factors such as vehicle types and design requirements. Automotive energy absorbing devices are usually made of alloy steel or aluminum alloy, etc., and are fixed to the box body on the longitudinal beam of the vehicle in a certain way. It can absorb part of the energy during the collision to reduce the damage to the vehicle longitudinal beam and the occupants in the collision.

Chinese invention patent "Car energy-absorbing box based on negative Poisson's ratio structure filling and its multi-objective optimization method" application number: CN201611222807.5, publication date: 2017-05-31, publication number: CN106740620A discloses a negative Poisson The energy-absorbing box with a specific structure is composed of an energy-absorbing box body, a rear mounting plate and a concave hexagonal negative Poisson's ratio structure inner core.

However, the energy-absorbing box has the following problems: 1. Once the energy-absorbing box is deformed by collision, it must be completely replaced, and the parts cannot be recycled; 2. It does not have the ability to collapse in stages, and its energy-absorbing performance cannot be adjusted.

Contents of the invention

The purpose of the present invention is to provide a performance-adjustable automobile collision energy-absorbing device, which has high energy-absorbing efficiency, can realize multi-level graded collapse, adjustable energy-absorbing performance, easy standardization of parts, and recyclable parts.

The technical solution that realizes the object of the present invention is:

An automobile collision energy-absorbing device with adjustable performance, comprising a flange 1 for detachable fixed connection of an anti-collision beam, and a lower energy-absorbing box 2 and an upper energy-absorbing box fixedly connected to the flange 1 box 3 , the lower part of the upper crash box 3 is detachably plugged into the upper part of the lower crash box 2 .

Compared with the prior art, the present invention has significant advantages in that:

1. High energy-absorbing efficiency: the energy-absorbing box is filled with energy-absorbing materials, and the energy-absorbing efficiency is high.

2. The energy-absorbing performance is adjustable, and can realize graded collapse: the energy-absorbing performance of the device can be changed by changing the structural size parameters and energy-absorbing materials; the stacking and nesting design is adopted, and the energy-absorbing performance can also be changed by increasing the number of layers performance; the energy-absorbing device can also be collapsed step by step by changing the stiffness of each layer.

3. Parts are easy to standardize and recyclable: Parts can be designed in a standardized manner; parts that are not damaged during the collision can also be recycled during maintenance.

Description of drawings

Fig. 1 is an outline view of the energy-absorbing device for automobile collision with adjustable performance according to the present invention.

Fig. 2 is a schematic diagram of the internal structure of a performance-adjustable automobile collision energy-absorbing device.

Fig. 3 is an outline view of the performance-adjustable automobile collision energy-absorbing device of the present invention having a cylindrical shape.

Fig. 4 is an outline drawing of a performance-adjustable automobile collision energy-absorbing device superimposed on three layers.

Fig. 5 is an outline view of a three-layer superimposed performance-adjustable energy-absorbing device for automobile collisions with changing deformation guide grooves.

In the figure, 1 flange, 11 bolt hole, 2 lower energy-absorbing box, 21 lower inner shell, 22 lower outer shell, 3 upper energy-absorbing box, 31 upper inner shell, 32 upper outer shell, 33 horizontal ring, bottom of upper inner shell 35, 4 energy-absorbing materials, 26, 36, 56 deformation guide grooves, 5 superimposed energy-absorbing boxes, 51 superimposed inner shells.

Detailed ways

As shown in Figure 1, the performance-adjustable automobile collision energy-absorbing device of the present invention includes a flange 1 used for the detachable fixed connection of the anti-collision beam, and also includes a lower energy-absorbing device fixedly connected to the flange 1 box 2 and an upper crash box 3 , the lower part of the upper crash box 3 is detachably plugged into the upper part of the lower crash box 2 .

As shown in Figure 2, the lower energy-absorbing box 2 includes a cylindrical lower inner shell 21 and a lower outer shell 22 set outside the lower inner shell 21, the inner diameter of the lower part of the lower inner shell 21 is smaller than the inner diameter of the upper part, and the upper and lower ends It is smoothly connected with the upper end of the lower part, and the bottom ends of the lower inner shell 21 and the lower outer shell 22 are fixedly connected with the flange 1;

The upper crash box 3 includes an upper inner shell 31 and an upper outer shell 32 set outside the upper inner shell 31. The inner diameter of the lower part of the upper inner shell 31 is smaller than the inner diameter of the upper part, and the lower end of the upper part is smoothly connected with the upper end of the lower part. The upper end of the upper inner shell 31 is fixedly connected with the upper end of the upper outer shell 32 through a horizontal ring 33;

The bottom end of the upper inner shell 31 is closed by a horizontal plate to form the bottom 35 of the upper inner shell;

The lower part of the upper inner shell 31 is inserted into the upper part of the lower inner shell 21 with an interference fit, so that the lower end of the upper outer shell 32 and the upper end of the lower outer shell 22 are in direct contact with each other;

The energy-absorbing material 4 is filled in the lower inner shell 21 between the bottom 35 of the upper inner shell and the flange 1 , and the energy-absorbing material 4 is also filled in the upper inner shell 31 with a small inner diameter.

The height of the lower shell 22 is the same as that of the lower inner shell 21 , and the height of the upper shell 32 is the same as that of the upper part of the upper inner shell 31 with a large inner diameter.

A horizontal deformation guide groove 36 is provided around the upper shell 32 .

A horizontal deformation guide groove 26 is provided around the lower shell 22 .

Preferably, the lower crash box 2 and the upper crash box 3 are cylindrical in shape as shown in FIG. 3 or square as shown in FIGS. 1 to 2 .

As shown in Fig. 4, as an improvement, at least one superimposed crash box 5 with the same structure is arranged on the upper crash box 3, and the lower part of the superimposed inner shell 51 of the superimposed crash box 5 is inserted with an interference fit The upper inner shell 21 of the upper crash box 3 or the upper part of another stacked inner shell 51 .

As shown in Figure 5, as a further improvement, the section height of the deformation guide groove 56 on the superimposed crash box 5 is the largest, the section height of the deformation guide groove 36 on the lower crash box 2 is the smallest, and the section height of the deformation guide groove 36 on the upper crash box 3 is the smallest. The section height of the deformation guide groove 26 is between the above two.

The flange 1 is connected to the anti-collision beam of the automobile through the bolt holes 11, and the other end of the energy absorbing device is welded to the longitudinal beam of the automobile.

The working process of the present invention is illustrated below with specific examples.

Embodiment one

As shown in Figures 1 and 2, the nested and stacked automobile collision energy-absorbing device according to Embodiment 1 of the present invention, the energy-absorbing boxes 2 and 3 are made of high-strength steel plates, and the energy-absorbing material 4 is aluminum foam. The flange plate 1 is connected with the anti-collision beam of the automobile through the bolt hole 11, and the other end of the energy absorbing device is welded with the longitudinal beam of the automobile. Taking the frontal collision of a car at medium and high speed as an example, in this embodiment, when the collision occurs, the front anti-collision beam transmits the collision energy to the energy-absorbing device of the car, and the energy-absorbing device begins to collapse and absorb energy, and the deformation guide on the outer wall The groove can guide rapid collapse and improve the uniformity of the overall deformation. When the front shell is compressed, the collision continues and the internal energy-absorbing material 4 starts to be compressed until the entire energy-absorbing device is completely compressed, and the work of the device is completed. . If the parts that are not deformed during the collision process can be recycled during the maintenance process, the cost is saved and the material utilization rate is improved.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Any modification, replacement and change made within the spirit and principles of the present invention are within the protection scope of the present invention.

Embodiment two

As shown in FIG. 3 , the nested and stacked automobile collision energy-absorbing device according to the fourth embodiment of the present invention, the energy-absorbing boxes 2 and 3 are made of high-strength steel plates, and the energy-absorbing material 4 is aluminum foam. Change the cross-sectional shape of the pipe into a circle, and deform the guide grooves 26 and 36 around the outer shell. The flange plate 1 is connected with the anti-collision beam of the automobile through the bolt hole 11, and the other end of the energy absorbing device is welded with the longitudinal beam of the automobile. Taking the frontal collision of a car at medium and high speed as an example, in this embodiment, when the collision occurs, the front anti-collision beam transmits the collision energy to the energy-absorbing device of the car, and the energy-absorbing device begins to collapse and absorb energy, and the deformation guide on the outer wall The groove can guide rapid collapse and improve the uniformity of the overall deformation. When the front shell is compressed, the collision continues and the internal energy-absorbing material 4 starts to be compressed until the entire energy-absorbing device is completely compressed, and the work of the device is completed. . If the parts that are not deformed during the collision process can be recycled during the maintenance process, the cost is saved and the material utilization rate is improved.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Any modification, replacement and change made within the spirit and principles of the present invention are within the protection scope of the present invention.

Embodiment three

As shown in FIG. 4 , the nested and stacked automobile collision energy-absorbing device according to the second embodiment of the present invention, the energy-absorbing boxes 2, 3 and 5 are made of high-strength steel plates, and the energy-absorbing material 4 is aluminum foam. On the basis of the energy-absorbing device in Embodiment 1, a layer of energy-absorbing box 5 is added, and the box is filled with energy-absorbing material 4 . The flange plate 1 is connected with the anti-collision beam of the automobile through the bolt hole 11, and the other end of the energy absorbing device is welded with the longitudinal beam of the automobile. Taking the frontal collision of a car at medium and high speed as an example, in this embodiment, when the collision occurs, the front anti-collision beam transmits the collision energy to the energy-absorbing device of the car, and the energy-absorbing device begins to collapse and absorb energy, and the deformation guide on its outer wall The groove can guide rapid collapse and improve the uniformity of the overall deformation. When the front shell is compressed, the collision continues and the internal energy-absorbing material 4 starts to be compressed until the entire energy-absorbing device is completely compressed, and the work of the device is completed. . Compared with the energy-absorbing device in Embodiment 1, since the energy-absorbing device in this embodiment has one more layer, its overall energy-absorbing performance is improved. If the parts that are not deformed during the collision process can be recycled during the maintenance process, the cost is saved and the material utilization rate is improved.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Any modification, replacement and change made within the spirit and principles of the present invention are within the protection scope of the present invention.

Embodiment four

As shown in FIG. 5 , the nested and stacked automobile collision energy-absorbing device according to the third embodiment of the present invention, the energy-absorbing boxes 2, 3 and 5 are made of high-strength steel plates, and the energy-absorbing material 4 is aluminum foam. The purpose of changing the structural rigidity is achieved by changing the dimensions of the external deformation guide grooves 26, 36 and 56 in the second embodiment. In this example, the deformation guide groove 56 has the largest section height, and the deformation guide groove 36 on the lower crash box 2 has a cross-section The height is the smallest, and the section height of the deformation guide groove 26 on the upper crash box 3 is between the aforementioned two. The flange plate 1 is connected with the anti-collision beam of the automobile through the bolt hole 11, and the other end of the energy absorbing device is welded with the longitudinal beam of the automobile. Taking the frontal collision of a car at medium and high speed as an example, in this embodiment, when the collision occurs, the front anti-collision beam transmits the collision energy to the energy-absorbing device of the car. Due to the large size of the deformation guide groove of the most front-end structure, its stiffness The structural deformation first starts from the lower rigidity part, and gradually expands to the rear end, so as to realize the graded collapse from front to back. If the parts that are not deformed during the collision process can be recycled during the maintenance process, the cost is saved and the material utilization rate is improved.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Any modification, replacement and change made within the spirit and principles of the present invention are within the protection scope of the present invention.

Claims (5)

1. An automobile collision energy-absorbing device with adjustable performance, including a flange (1) for detachable fixed connection of the anti-collision beam, characterized in that: It also includes a lower energy-absorbing box (2) and an upper energy-absorbing box (3) fixedly connected to the flange (1), and the lower part of the upper energy-absorbing box (3) is detachably inserted into the lower energy-absorbing box Inside the upper part of the box (2); The lower energy-absorbing box (2) includes a cylindrical lower inner shell (21) and a lower outer shell (22) set outside the lower inner shell (21), and the lower inner diameter of the lower inner shell (21) is smaller than the upper inner diameter , the lower end of the upper part is smoothly connected with the upper end of the lower part, and the bottom ends of the lower inner shell (21) and the lower outer shell (22) are fixedly connected with the flange (1); The upper energy-absorbing box (3) includes an upper inner shell (31) and an upper outer shell (32) set outside the upper inner shell (31). The inner diameter of the lower part of the upper inner shell (31) is smaller than the inner diameter of the upper part. The lower end of the upper part is smoothly connected with the upper end of the lower part, and the upper end of the upper inner shell (31) is fixedly connected with the upper end of the upper outer shell (32) through a horizontal ring (33); The bottom of the upper inner shell (31) is closed by a horizontal plate to form the bottom of the upper inner shell (35); The lower part of the upper inner shell (31) is inserted into the upper part of the lower inner shell (21) with an interference fit, so that the lower end of the upper outer shell (32) is in direct contact with the upper end of the lower outer shell (22); The lower inner shell (21) between the bottom of the upper inner shell (35) and the flange (1) is filled with energy-absorbing material (4), and the upper inner shell (31) with a small inner diameter is also filled with energy-absorbing materials material(4); The lower energy-absorbing box (2) and the upper energy-absorbing box (3) are cylindrical or square in shape; At least one superimposed energy-absorbing box (5) with the same structure is arranged on the upper energy-absorbing box (3), and the lower part of the superimposed inner shell (51) of the superimposed energy-absorbing box (5) is inserted into the upper The upper inner shell (31) of the crash box (3) or the upper part of another superimposed inner shell (51). 2. The energy absorbing device according to claim 1, characterized in that: The height of the lower shell (22) is the same as that of the lower inner shell (21), and the height of the upper shell (32) is the same as that of the upper part of the large inner diameter of the upper inner shell (31). 3. The energy absorbing device according to claim 2, characterized in that: A horizontal deformation guide groove (36) is provided on the periphery of the upper shell (32). 4. The energy absorbing device according to claim 3, characterized in that: A horizontal deformation guide groove (26) is provided around the lower casing (22). 5. The energy absorbing device according to claim 1, characterized in that: The section height of the deformation guiding groove (56) on the superimposed energy-absorbing box (5) is the largest, the section height of the deformation guiding groove (26) on the lower energy-absorbing box (2) is the smallest, and the section height of the deformation guiding groove (26) on the upper energy-absorbing box (3) is the largest. The section height of the deformation guide groove (36) is between the aforementioned two.