CN112519710A

CN112519710A - Anti-collision beam structure for improving vehicle frontal collision compatibility and small offset collision safety

Info

Publication number: CN112519710A
Application number: CN202011536157.8A
Authority: CN
Inventors: 刘新良; 李彦波; 吴文珍; 孟宪瑞; 吕增伟
Original assignee: Ling Yun Industrial Corp Ltd; Ling Yun Industrial Co Ltd Automotive Parts R&D Branch
Current assignee: Ling Yun Industrial Corp Ltd; Ling Yun Industrial Co Ltd Automotive Parts R&D Branch
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-03-19

Abstract

The invention relates to an anti-collision beam structure for improving the front collision compatibility and the small offset collision safety of a vehicle, which comprises a beam and an energy absorption box assembly, wherein the energy absorption box assembly comprises a left energy absorption box main body and a right energy absorption box main body; a left energy absorption box covering part covers part of the left energy absorption box main body, and a right energy absorption box covering part covers part of the right energy absorption box main body; the left energy-absorbing box main body is connected with the cross beam through a bolt, and the right energy-absorbing box main body is connected with the cross beam through a bolt; the cross beam comprises a multi-section arc structure; the energy absorption box main body comprises an installation bottom plate, and a collapse guide rib and a cross beam end reinforcing structure are fixed on the installation bottom plate; one side of the collapse guiding rib is connected with an inclined plane, and the collapse guiding rib and the inclined plane are connected with an upper connecting surface. According to the novel aluminum alloy variable cross-section beam structure and the processing method, the high bending resistance of the beam can be ensured, and the modeling and installation requirements of an automobile outside the beam are also ensured; the processing method has strong applicability.

Description

Anti-collision beam structure for improving vehicle frontal collision compatibility and small offset collision safety

Technical Field

The invention relates to an anti-collision beam structure for improving the compatibility of frontal collision of a vehicle and the safety of small offset collision.

Background

With the gradual increase of the automobile holding capacity, the number of accidents of the automobile is gradually increased, and the safety of the automobile becomes a more and more concern of people in the collision process. In this context, the research was conducted in 2017 and 25% small offset crash, and the C-NCAP will also formally begin to implement MPDB condition that is more severe than ODB condition in 2021 for checking the safety of the vehicle.

When a vehicle is in a frontal collision, the two longitudinal beams are main energy-absorbing and crumpling components. Since the contact area of the small offset collision with the barrier is only 25% of the width of the vehicle, the longitudinal beam is basically avoided, and the energy in the collision is directly transmitted to the passenger compartment almost without being blocked. The front suspension, wheels and steering mechanism of the vehicle are also displaced rearwardly and, in severe cases, may intrude into the passenger compartment and cause injury to the passengers.

Compared with the ODB working condition, the MPDB working condition has larger collision energy, increases the evaluation of vehicle compatibility and mainly comprises barrier invasion uniformity, barrier breakdown and barrier virtual passenger load index. The implementation of MPDB working conditions puts higher requirements on the design of an anti-collision beam system, and as the collision energy is higher, the anti-bending performance of the anti-collision beam is higher, and the requirement on absorbed energy is higher. In order to improve the score of compatibility, the sizes of the body height direction and the body length direction of the impact beam body are required to be larger, and the larger the covering in the body width direction, the better.

The common steel anti-collision beam structures on the market are all fixed arcs, as shown in fig. 1, the anti-collision beam of the structure can only cover about 60% -70% of a vehicle basically because the anti-collision beam cannot adapt to the modeling change of the front part of the vehicle, and the evaluation and the scoring of small offset collision and MPDB are not favorable. The energy absorption boxes matched with the steel anti-collision beam are generally steel energy absorption boxes, and the steel energy absorption boxes cannot be completely matched with the shape change of the anti-collision beam in the design of the anti-collision beam due to the limitation of a stamping process and the strength and elongation of materials.

The present invention has been made to solve the above problems.

Disclosure of Invention

The invention aims to provide an anti-collision beam structure which improves the compatibility of the front collision of a vehicle and the safety of small offset collision.

The purpose of the invention is realized by the following technical scheme:

the anti-collision beam structure for improving the front collision compatibility and the small offset collision safety of the vehicle comprises a beam and an energy absorption box assembly, wherein the energy absorption box assembly comprises a left energy absorption box main body and a right energy absorption box main body; a left energy absorption box covering part covers part of the left energy absorption box main body, and a right energy absorption box covering part covers part of the right energy absorption box main body; the left energy-absorbing box main body is connected with the cross beam through a bolt, and the right energy-absorbing box main body is connected with the cross beam through a bolt.

Preferably, the cross beam comprises a multi-segment arc structure.

Preferably, the cross beam is of a three-section arc structure, the three-section arc structure comprises three sections of fixed arcs, and a transition arc is formed between each fixed arc and the corresponding fixed arc.

The cross beam includes a notch.

Further, the process route for realizing the variable curvature of the beam comprises the following steps:

s1, rolling and pressing the cross beam into a straight strip shape;

s2, rolling the beam into a fixed arc;

s3, cutting a notch on the inner arc surface of the beam;

and S4, folding the cross beam inwards at the notch.

Furthermore, the notch comprises a notch deformation area, a notch outer side surface, a notch inner side surface and a notch inner arc surface connection area.

Furthermore, the notch deformation area is a deformation area formed by variable curvature, is in a circular arc shape, and is a rotation center in the process of forming the transition arc.

Furthermore, the outer side surface and the inner side surface of the notch are inner side surfaces and outer side surfaces of the notch, and the length sizes are equal; the notch deformation zone is circular in shape.

Preferably, the included angle between the inner side surface of the incision and the outer side surface of the incision is theta, and the value theta is 5-60 degrees.

Preferably, the energy absorption box main body comprises a mounting bottom plate, and a crumple guide rib and a beam end reinforcing structure are fixed on the mounting bottom plate; one side of the collapse guiding rib is connected with an inclined plane, and the collapse guiding rib and the inclined plane are connected with an upper connecting surface.

Preferably, the upper connecting surface is provided with a rivet nut.

Has the advantages that:

1. by the novel aluminum alloy variable cross-section beam structure and the processing method, the high bending resistance of the beam can be ensured, and the modeling and installation requirements of an automobile outside the beam are also ensured; the processing method has strong applicability and flexible process selection mode, and is suitable for various aluminum alloy section combination forms.

2. The whole beam is in a variable curvature form and is divided into three arcs but not limited to the three arcs, and the structure has the advantages that the shape change of the front part of a vehicle can be adapted, and the beam can cover 70% -85% of the width of the vehicle body.

3. The main body material of the energy absorption box is an aluminum alloy extruded section, and the upper connecting surface is used for being attached and connected with a cross beam; the inclined plane has the function of reducing the first peak value of collision and ensuring the stability of energy absorption; the collapse guiding ribs are used for ensuring the collapse stability of the energy absorption box in the collapsing process; the mounting bottom plate is connected with the longitudinal beam mounting plate; the cross beam end reinforcing structure plays a supporting role in a small offset collision process, and the collision force value can be transmitted to the longitudinal beam for energy absorption.

Drawings

The invention will be further described with reference to the accompanying drawings.

Fig. 1 is a structural schematic diagram of a steel anti-collision beam commonly used in the market at present.

Fig. 2 is a schematic view of the structure of the impact beam of the present invention.

Fig. 3 is a partial structural schematic view of the impact beam structure of the present invention.

Fig. 4 is a schematic view of the beam structure of the present invention.

FIG. 5 is a schematic view of a beam straight strip structure according to the present invention.

FIG. 6 is a schematic view of an arcing structure of a beam according to the present invention.

FIG. 7 is a schematic view of a cross beam notch structure according to the present invention.

Fig. 8 is a schematic perspective view of a beam notch of the present invention.

FIG. 9 is a schematic view of a variable curvature forming structure of a beam according to the present invention.

FIG. 10 is an isometric view of a beam cutout of the present invention.

FIG. 11 is a partial cut-away view of a beam body of the present invention.

Fig. 12 is a schematic view of the dimensions of a beam end cutout of the present invention.

FIG. 13 is a view of a cross beam notched weld of the present invention.

Fig. 14 is a partial view of the beam of the present invention welded after variable curvature forming.

FIG. 15 is an isometric view of a crash box assembly of the present invention.

FIG. 16 is an isometric view of a crash box body of the present invention.

FIG. 17 is a schematic view of a crash box cover construction of the present invention.

Reference numerals:

1. a cross beam; 1.1, a notch deformation zone; 1.2, the outer side of the notch; 1.3, inner side surface of the incision; 1.4, a notch inner arc surface connection area; 11. arc fixing; 12. a transition arc; 2. a left crash box body; 3. a right energy absorption box main body; 3.1, an upper connecting surface; 3.2, pulling and riveting the nut; 3.3, inclined plane; 3.4, collapsing guide ribs; 3.5, mounting a bottom plate; a beam end reinforcement structure 3.6; 4. a left crash box cover; 5. a right crash box cover; 6. and (4) bolts.

Detailed description of the preferred embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2-3, the anti-collision beam structure for improving the front collision compatibility and the small offset collision safety of the vehicle comprises a beam 1 and an energy absorption box assembly, wherein the energy absorption box assembly comprises a left energy absorption box main body 2 and a right energy absorption box main body 3; a left energy-absorbing box covering part 4 covers part of the left energy-absorbing box main body 2, and a right energy-absorbing box covering part 5 covers part of the right energy-absorbing box main body 3; the left energy-absorbing box main body 2 is connected with the cross beam 1 through a bolt 6, and the right energy-absorbing box main body 3 is connected with the cross beam 1 through a bolt 6; the whole beam 1 is in a variable curvature form, comprises a multi-section arc structure and is composed of a plurality of sections of fixed arcs 11, and a transition arc 12 is formed between each fixed arc 11 and the corresponding fixed arc 11.

Example 1

Referring to fig. 4, in this embodiment, the beam 1 is a three-segment arc structure, the three-segment arc structure includes three fixed arcs 11, and a transition arc 12 is formed between the fixed arcs 11 and the fixed arcs 11; the structure has the advantages that the structure can adapt to the modeling change of the front part of the vehicle, and the cross beam can cover 70-85% of the width of the vehicle body.

The cross beam includes a notch.

Referring to fig. 5-9, the process route for achieving variable curvature of the beam includes the steps of:

s1, rolling and pressing the cross beam into a straight strip shape;

s2, rolling the beam into a fixed arc;

s3, cutting a notch on the inner arc surface of the beam;

and S4, folding the cross beam inwards at the notch.

As shown in fig. 10-11, the notch includes a notch deformation region 1.1, a notch outer side surface 1.2, a notch inner side surface 1.3, and a notch intrados connection region 1.4; wherein the notch deformation zone 1.1 is a deformation zone formed by variable curvature, is in a circular arc shape, and has a diameter of R; the material is also the rotation center of the transition arc 12 in the forming process, and the material is extruded inwards in the variable curvature forming process of the beam 1, so that the local deformation of the beam 1 is avoided, and the flatness of the side surface of the beam 1 is ensured; the outer side face 1.2 and the inner side face 1.3 of the notch are inner side faces and outer side faces of the notch, and the length dimension L1 is equal, so that the notch can be butted together for welding after variable curvature forming; the notch intrados connection zone 1.4 is a notch intrados connection zone that should be guaranteed to butt together after forming for welding.

As shown in fig. 12, the width of the beam is L, the shape of the notch deformation region is 1.1, and the notch deformation region is circular, so that when the end portion is bent and deformed, local material can be ensured to deform to the vacant part, and local bulge and crack are not caused; the angle between the incision inner side 1.2 and the incision outer side 1.3 is θ, which has a value θ of 5 ° to 60 °, which is determined by the elongation of the material and the external environment.

As shown in fig. 13-14, which are partial views of welding after the variable curvature forming of the beam, except for the notch deformation region 1.1, the notch inner side 1.2 and the notch outer side 1.3 of the notch butt joint region are connected by welding.

As shown in FIG. 15, which is an isometric view of the crash box assembly, the crash box cover and the crash box body are joined by welding.

As shown in fig. 16, the crash box main body comprises a mounting base plate 3.5, and a collapse guide rib 3.4 and a beam end reinforcing structure 3.6 are fixed on the mounting base plate 3.5; one side of the collapse guiding rib 3.4 is connected with an inclined plane 3.3, the collapse guiding rib 3.4 and the inclined plane 3.3 are connected with an upper connecting surface 3.1, the upper connecting surface 3.1 is provided with a rivet nut 3.2, the main body material of the energy absorption box is an aluminum alloy extruded section, and the upper connecting surface is used for being attached and connected with the cross beam; the inclined plane has the function of reducing the first peak value of collision and ensuring the stability of energy absorption; the collapse guiding ribs are used for ensuring the collapse stability of the energy absorption box in the collapsing process; the mounting bottom plate is connected with the longitudinal beam mounting plate; the cross beam end reinforcing structure plays a supporting role in a small offset collision process, and the collision force value can be transmitted to the longitudinal beam for energy absorption.

As shown in fig. 17, the energy-absorbing box cover can ensure that the energy-absorbing box can be supported better when being collapsed in the X direction and can improve the energy absorption of the energy-absorbing box assembly.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The anti-collision beam structure is characterized by comprising a cross beam (1) and an energy absorption box assembly, wherein the energy absorption box assembly comprises a left energy absorption box main body (2) and a right energy absorption box main body (3); a left energy-absorbing box covering part (4) covers part of the left energy-absorbing box main body (2), and a right energy-absorbing box covering part (5) covers part of the right energy-absorbing box main body (3); the left energy absorption box main body (2) is connected with the cross beam (1) through a bolt (6), and the right energy absorption box main body (3) is connected with the cross beam (1) through the bolt (6).

2. An impact beam structure according to claim 1, characterized in that said cross beam (1) comprises a multi-segment arc structure.

3. An impact beam structure according to claim 2, characterized in that the cross beam (1) is a three-segment arc structure comprising three fixed arcs (11), and a transition arc (12) is formed between the fixed arcs (11) and the fixed arcs (11).

4. An impact beam structure according to claim 1, wherein the process route for achieving the variable curvature of the cross beam comprises the steps of:

s1, rolling and pressing the cross beam into a straight strip shape;

s2, rolling the beam into a fixed arc;

s3, cutting a notch on the inner arc surface of the beam;

and S4, folding the cross beam inwards at the notch to form a transition arc.

5. Impact beam structure according to claim 4, characterized in that the notch comprises a notch deformation zone (1.1), a notch outer side (1.2), a notch inner side (1.3), a notch intrados connection zone (1.4).

6. An impact beam structure according to claim 5, wherein said notch deformation zone (1.1) is a deformation zone shaped with a variable curvature, is in the shape of a circular arc, and is the center of rotation of the transition arc (12) during the shaping process.

7. The impact beam structure according to claim 5, wherein the cut outer side (1.2) and the cut inner side (1.3) are notched inner and outer sides with equal length dimensions; the shape (1.1) of the notch deformation zone is circular.

8. The impact beam structure according to claim 5, wherein the included angle θ between the notch inner side (1.2) and the notch outer side (1.3) is 5 ° -60 °.

9. The impact beam structure according to claim 1, wherein the crash box body comprises a mounting base plate (3.5), and a crush guide rib (3.4) and a beam end reinforcing structure (3.6) are fixed on the mounting base plate (3.5); one side of the collapse guiding rib (3.4) is connected with an inclined plane (3.3), and the collapse guiding rib (3.4) and the inclined plane (3.3) are connected with an upper connecting surface (3.1).

10. Impact beam structure according to claim 9, characterized in that the upper attachment face (3.1) is provided with a blind rivet nut (3.2).