CN219214932U

CN219214932U - Multi-stage rigidity-variable detachable anti-collision beam

Info

Publication number: CN219214932U
Application number: CN202320937055.XU
Authority: CN
Inventors: 孙洪海; 刘帅; 宋建龙; 王春辉; 刘磊; 陈令凯; 姚春冶
Original assignee: Changchun Yingli Automotive Industry Co ltd
Current assignee: Changchun Yingli Automotive Industry Co ltd
Priority date: 2023-04-23
Filing date: 2023-04-23
Publication date: 2023-06-20
Anticipated expiration: 2033-04-23

Abstract

The utility model provides a multistage rigidity-variable detachable anti-collision beam, which comprises an anti-collision beam body, an energy-absorbing box and a fixed base, wherein the rigidity of the energy-absorbing box is larger than that of the anti-collision beam body, two ends of the energy-absorbing box are respectively welded with the anti-collision beam body and the fixed base, the anti-collision beam body comprises a low rigidity honeycomb crushing structure, a middle rigidity honeycomb crushing structure, an inner shell and an outer shell, the inner shell and the outer shell are of U-shaped structures with unsealed length ends, strip-shaped holes are respectively formed in positions, close to the length ends, on the inner shell and the outer shell, of the inner shell, and the inner shell is inserted into the outer shell in a U-shaped opening opposite mode and is locked through bolts; the inner layer shell is inserted into the outer layer shell to form a wrapping space, and the medium-rigidity honeycomb crushing structure is limited in the wrapping space; the low-rigidity honeycomb crushing structure is fixedly adhered to the U-shaped bottom of the outer shell. The utility model can partially replace the anti-collision beam according to the damage degree of the anti-collision beam so as to reduce the maintenance cost.

Description

Multi-stage rigidity-variable detachable anti-collision beam

Technical Field

The utility model relates to the technical field of automobile anti-collision beams, in particular to a multi-stage rigidity-variable anti-collision beam which is assembled and disassembled integrally.

Background

The anti-collision beam is taken as an important component of the body structure of the passenger vehicle, and has important roles in protecting the life safety of passengers, the safety of the vehicle, such as crashworthiness, collision energy absorption, structural integrity and the like. At present, anti-collision beams with metal structures such as aluminum alloy and nonmetal structures such as fiber materials are widely used for passenger car body structures, and along with development and progress of new technologies, new materials and new structures, the structural advancement of the anti-collision beams and the energy absorption efficiency of the anti-collision beams are continuously improved.

However, the whole structure of the anti-collision beam needs to be replaced after being damaged once bearing the impact load, whether the anti-collision beam is of a metal structure or a non-metal structure, so that the maintenance cost is high, and the development requirement of economic maintenance is not facilitated.

Disclosure of Invention

In order to improve the forming performance of the thin-wall part, the utility model provides a multi-stage rigidity-variable anti-collision beam which is assembled and disassembled integrally, and the damaged part can be replaced according to the impact load so as to reduce the maintenance cost.

In order to achieve the above purpose, the present utility model adopts the following specific technical scheme:

the utility model provides a multistage rigidity-variable detachable anti-collision beam, which comprises an anti-collision beam body, an energy-absorbing box and a fixed base, wherein the rigidity of the energy-absorbing box is larger than that of the anti-collision beam body; the inner shell and the outer shell are of U-shaped structures with unsealed length ends, long strip holes for locking bolts are respectively formed in positions, close to the length ends, of the inner shell and the outer shell along the height direction, and the inner shell is inserted into the outer shell in a mode that the U-shaped openings are opposite and locked through the bolts; the inner shell is inserted into the outer shell to form a wrapping space, and the medium-rigidity honeycomb crushing energy-absorbing structure is limited in the wrapping space; the low-rigidity honeycomb crushing energy-absorbing structure is fixedly adhered to the U-shaped bottom of the outer shell, one end of the energy-absorbing box is welded with the fixed base, and the other end of the energy-absorbing box is welded with the U-shaped bottom of the inner shell.

Preferably, the honeycomb pore diameter of the low-rigidity honeycomb crushing energy-absorbing structure is larger than that of the medium-rigidity honeycomb crushing energy-absorbing structure, and the honeycomb pore wall of the low-rigidity honeycomb crushing energy-absorbing structure is thinner than that of the medium-rigidity honeycomb crushing energy-absorbing structure.

Preferably, the length of the U-shaped arms of the inner housing is shorter than the length of the U-shaped arms of the outer housing.

Preferably, the bolts are locked in the elongated holes at a position near the U-shaped bottom of the inner shell.

Preferably, crush points are provided on the crash boxes.

Compared with the prior art, the anti-collision beam provided by the utility model is provided with the multi-stage variable-rigidity crushing energy absorbing structure, so that impact loads of different degrees are absorbed, and the anti-collision beam can be detached and replaced according to the damaged part of the anti-collision beam, so that the maintenance cost is reduced.

Drawings

FIG. 1 is a schematic perspective view of a multi-stage variable stiffness detachable impact beam provided in accordance with an embodiment of the present utility model;

FIG. 2 is a schematic front view of a multi-stage variable stiffness detachable impact beam according to an embodiment of the present utility model;

FIG. 3 is a schematic top view of a multi-stage variable stiffness detachable impact beam provided in accordance with an embodiment of the present utility model;

fig. 4 is a schematic cross-sectional top view of fig. 2 taken along line A-A.

Wherein reference numerals include: the anti-collision beam comprises an anti-collision beam main body 1, a low-rigidity honeycomb crushing energy absorbing structure 11, a middle-rigidity honeycomb crushing energy absorbing structure 12, an inner shell 13, an outer shell 14, strip holes 15, bolts 16, an energy absorbing box 2, crushing points 21 and a fixed base 3.

Detailed Description

Hereinafter, embodiments of the present utility model will be described with reference to the accompanying drawings. In the following description, like modules are denoted by like reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, a detailed description thereof will not be repeated.

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 4, the multi-stage rigidity-variable detachable anti-collision beam provided by the embodiment of the utility model comprises an anti-collision beam body 1, an energy absorption box 2 and a fixed base 3, wherein one end of the energy absorption box 2 is welded with the anti-collision beam body 1, the other end of the energy absorption box 2 is fixed with the fixed base 3, and the fixed base 3 is fixed on a vehicle body through bolts. The rigidity of the energy-absorbing box 2 is larger than that of the anti-collision beam body 1 so as to absorb the impact load to the greatest extent, the anti-collision beam body 1 is divided into two levels of rigidity so as to absorb the impact load to the medium degree and the impact load to the low degree, and the multi-level variable rigidity of the anti-collision beam is realized through the combination of the anti-collision beam body 1 and the energy-absorbing box 2.

The utility model does not improve the structure of the energy-absorbing box 2, the energy-absorbing box 2 adopts the conventional products in the market, and the inside of the energy-absorbing box is provided with a high-rigidity honeycomb crushing energy-absorbing structure.

Crush points are arranged on the energy-absorbing box 2, and the energy-absorbing box 2 is crushed and energy-absorbed and deformed from the crush points.

The anti-collision beam body 1 comprises a low-rigidity honeycomb crushing energy absorbing structure 11, a medium-rigidity honeycomb crushing energy absorbing structure 12, an inner shell 13 and an outer shell 14, wherein the inner shell 13 and the outer shell 14 form a shell of the anti-collision beam body 1, the low-rigidity honeycomb crushing energy absorbing structure 11 is adhered to the shell, and the medium-rigidity honeycomb crushing energy absorbing structure 12 is positioned in the shell.

The inner shell 13 and the outer shell 14 are both U-shaped structures, namely the cross sections are U-shaped grooves, and the two ends of the inner shell 13 and the outer shell 14 along the length are not sealed, so that the crushing deformation of the medium-rigidity honeycomb crushing energy absorbing structure 12 is facilitated.

The positions, close to the two ends of the length, on the inner layer shell 13 and the outer layer shell 14 are respectively provided with a strip hole 15 for locking the bolt 16 along the height direction, the U-shaped opening of the inner layer shell 13 faces the U-shaped opening of the outer layer shell 14 and is inserted into the outer layer shell 14, the screw rod of the bolt 15 is inserted into the strip hole 15, and then the nut of the bolt 15 is screwed onto the screw rod, so that the inner layer shell 13 and the outer layer shell 14 are locked.

The length of the U-shaped arm of the inner housing 13 is shorter than the length of the U-shaped arm of the outer housing 14, and the bolt 16 is locked to the elongated hole 15 at a position near the U-shaped bottom of the inner housing 13.

The elongated holes 15 and bolts 16 not only play a role in fixation, but also play a role in guiding the crushing deformation of the medium-rigidity honeycomb crushing energy-absorbing structure 12.

The inner shell 13 is inserted into the outer shell 14 to form a wrapping space, the medium-rigidity honeycomb crushing energy absorbing structure 12 is limited in the wrapping space, and the upper end and the lower end of the medium-rigidity honeycomb crushing energy absorbing structure are clamped and fixed with the U-shaped bottom of the outer shell 14 through the inner shell 13.

The energy-absorbing box 2 is welded and fixed with the U-shaped bottom of the inner shell 13, and the low-rigidity honeycomb crushing energy-absorbing structure 11 is adhered and fixed with the U-shaped bottom of the outer shell 14 through an adhesive.

The U-shaped bottoms of the inner and outer shells 13, 14 are referred to as U-shaped bottoms.

The honeycomb pore diameter of the low-rigidity honeycomb crushing energy-absorbing structure 11 is larger than that of the medium-rigidity honeycomb crushing energy-absorbing structure 12, the honeycomb pore wall of the low-rigidity honeycomb crushing energy-absorbing structure 11 is thinner than that of the medium-rigidity honeycomb crushing energy-absorbing structure 12, and the rigidity of the low-rigidity honeycomb crushing energy-absorbing structure 11 is ensured to be smaller than that of the medium-rigidity honeycomb crushing energy-absorbing structure 12.

When the impact load is small, only the low-rigidity honeycomb crushing energy absorbing structure 11 crushes, deforms and absorbs energy.

When the impact load is large, the low-rigidity honeycomb crushing energy-absorbing structure 11 is crushed and deformed, the impact load is transmitted to the outer shell 14, the outer shell 14 overcomes the pretightening force of the bolts 16 between the outer shell and the inner shell 13 and is guided by the bolts 16, the outer shell 14 moves towards the vehicle body, the medium-rigidity honeycomb crushing energy-absorbing structure 12 is crushed, and the impact load is absorbed.

When the impact load is further increased, the low-rigidity honeycomb crushing energy-absorbing structure 11 and the medium-rigidity honeycomb crushing energy-absorbing structure 12 are crushed, the larger impact force is borne by the energy-absorbing box 2, and the impact load is absorbed through the crushing deformation of the energy-absorbing box 2.

When the external impact load is small, only the low-rigidity honeycomb crushing energy-absorbing structure 11 is damaged, and only the low-rigidity honeycomb crushing energy-absorbing structure 11 needs to be replaced during maintenance. When the external impact load is large, only the low-rigidity honeycomb crushing energy-absorbing structure 11 and the medium-rigidity honeycomb crushing energy-absorbing structure 12 are replaced. Only when the external impact load is large, the integral multi-stage rigidity-variable anti-collision beam needs to be replaced. Therefore, the device can be maintained in a targeted manner according to different damage degrees, so that the maintenance workload is greatly saved, the maintenance man-hour is shortened, and the maintenance cost is saved.

In the actual structural design, key parameter values such as the diameter of the honeycomb holes, the wall thickness of the honeycomb holes, the shape of the honeycomb holes, the height of the honeycomb holes, the honeycomb hole materials (metal, glass fiber, carbon fiber composite materials and the like) of the various levels of variable stiffness honeycomb crushing energy-absorbing structures can be comprehensively analyzed and designed according to different vehicle types and performance index requirements.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

The above embodiments of the present utility model do not limit the scope of the present utility model. Any of various other corresponding changes and modifications made according to the technical idea of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. The utility model provides a multistage rigidity-variable detachable anti-collision beam, includes anti-collision beam body, energy-absorbing box and unable adjustment base, the rigidity of energy-absorbing box is greater than the rigidity of anti-collision beam body, its characterized in that, anti-collision beam body includes low rigidity honeycomb crushing energy-absorbing structure, well rigidity honeycomb crushing energy-absorbing structure, inlayer casing and outer casing; wherein, the liquid crystal display device comprises a liquid crystal display device,

the inner layer shell and the outer layer shell are of U-shaped structures with unsealed length ends, long strip holes for locking bolts are respectively formed in positions, close to the length ends, of the inner layer shell and the outer layer shell along the height direction, and the inner layer shell is inserted into the outer layer shell in a mode that U-shaped openings are opposite to each other and is locked through the bolts; the inner layer shell is inserted into the outer layer shell to form a wrapping space, and the medium-rigidity honeycomb crushing energy absorbing structure is limited in the wrapping space;

the low-rigidity honeycomb crushing energy-absorbing structure is fixedly bonded to the U-shaped bottom of the outer shell, one end of the energy-absorbing box is welded with the fixing base, and the other end of the energy-absorbing box is welded with the U-shaped bottom of the inner shell.

2. The multi-stage variable stiffness detachable impact beam of claim 1, wherein the low stiffness honeycomb crush energy absorbing structure has a larger cell aperture than the medium stiffness honeycomb crush energy absorbing structure, and the low stiffness honeycomb crush energy absorbing structure has a thinner cell aperture wall than the medium stiffness honeycomb crush energy absorbing structure.

3. The multi-stage variable stiffness detachable impact beam of claim 2, wherein the length of the U-shaped arms of the inner shell is shorter than the length of the U-shaped arms of the outer shell.

4. The multi-stage variable stiffness detachable impact beam of claim 3, wherein the bolts are locked to the elongated holes at a location near the U-shaped bottom of the inner shell.

5. The multi-stage variable stiffness detachable impact beam of any of claims 1 to 4, wherein crush points are provided on the crash boxes.