CN112896081A

CN112896081A - Bumper energy absorption device

Info

Publication number: CN112896081A
Application number: CN202110318516.0A
Authority: CN
Inventors: 黄金华; 富越
Original assignee: Yanfeng Plastic Omnium Automotive Exterior Systems Co Ltd
Current assignee: Yanfeng Plastic Omnium Automotive Exterior Systems Co Ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-06-04

Abstract

The invention relates to a bumper energy absorption device, which comprises a bumper skin, a foam structure and an anti-collision beam, wherein the foam structure is arranged between the bumper skin and the anti-collision beam; the surface of the foam structure facing the bumper skin is sunken to form a bumper groove, and the bumper skin is clamped in the bumper groove to be matched; the surface of the foam structure facing the anti-collision beam is sunken to form an anti-collision beam groove, and the anti-collision beam is clamped in the anti-collision beam groove to be matched; the foam structure has the turn-ups of buckling towards the anticollision roof beam, and the turn-ups cladding is in the both ends cooperation of anticollision roof beam. According to the bumper energy absorption device, the foam structure provides energy absorption space and crumple capability, and the energy absorption structure is adjusted in multiple directions through the design of the bumper groove, the anti-collision beam groove and the flanging of the foam structure, so that the bumper energy absorption device is high in applicability to various vehicle types.

Description

Bumper energy absorption device

Technical Field

The invention relates to a vehicle front bumper, in particular to a bumper energy absorption device.

Background

With the increasing requirements of automobiles on appearance and driving safety, the contradiction of functional requirements in bumper products is becoming more and more obvious. The bumper, which is a member that first comes into contact with the outside when a vehicle collides, needs to satisfy various collision passive safety regulations. Such as pedestrian protection, low speed collisions, RCAR, etc. Various collision laws and regulations require that the bumper can absorb more energy, and a larger collapse space can be reserved in the X direction to protect a vehicle body and pedestrians. However, the existing energy-absorbing structure adjusting technology only adjusts one energy-absorbing structure at the front end of the vehicle to achieve the purpose that the vehicle meets the pedestrian protection regulations, but the pedestrian protection is a system engineering, the structural adjustment of a single energy-absorbing structure cannot be well popularized, and the applicability to other vehicle types is low.

Disclosure of Invention

In order to solve the problems that the energy absorption structure in the prior art is low in adjustment adaptability and the like, the invention provides a bumper energy absorption device.

The energy absorption device for the bumper comprises a bumper skin, a foam structure and an anti-collision beam, wherein the foam structure is arranged between the bumper skin and the anti-collision beam; the surface of the foam structure facing the bumper skin is sunken to form a bumper groove, and the bumper skin is clamped in the bumper groove to be matched; the surface of the foam structure facing the anti-collision beam is sunken to form an anti-collision beam groove, and the anti-collision beam is clamped in the anti-collision beam groove to be matched; the foam structure has the turn-ups of buckling towards the anticollision roof beam, and the turn-ups cladding is in the both ends cooperation of anticollision roof beam.

Preferably, the foam structure has a middle portion, the bumper recess being provided by the middle portion.

Preferably, the foam structure further has side portions fixedly attached symmetrically to opposite sides of the central portion, the impact beam recess being provided by the side portions.

Preferably, the foam structure further has two symmetrically disposed edge portions fixedly attached to the side portions opposite the central portion, respectively, and the cuff is provided by the edge portions.

Preferably, the side edge portion has a mounting attachment point adjacent the edge portion through which a fastener is mounted to the bumper skin.

Preferably, the bumper skin has a protrusion protruding towards the foam structure, the protrusion fitting into a bumper recess.

Preferably, the bumper skin has protruding ribs for insertion into the foam structure.

Preferably, the rib is inserted into the foam structure below the bumper recess.

Preferably, the impact beam is a lower leg metal beam of the front bumper.

According to the bumper energy absorption device, the foam structure provides energy absorption space and crumple capability, and the energy absorption structure is adjusted in multiple directions through the design of the bumper groove, the anti-collision beam groove and the flanging of the foam structure, so that the bumper energy absorption device is high in applicability to various vehicle types. Moreover, according to the bumper energy absorption device disclosed by the invention, the injury index to pedestrians can be reduced through the foam structure, the structure is simple, the cost is low, the bumper energy absorption effect can be effectively increased, the pedestrian protection performance and the performance of various low-speed collisions are improved, and the injury to the pedestrians during the collision is reduced.

Drawings

FIG. 1 is an exploded view of a bumper energy absorber device according to a preferred embodiment of the present invention;

FIG. 2 is a front view of the foam structure of FIG. 1;

FIG. 3 is a cross-sectional view of a bumper energy absorber device according to the preferred embodiment in a middle portion of a foam structure;

FIG. 4 is a cross-sectional view of a bumper energy absorber device according to the preferred embodiment at a side portion of a foam structure;

FIG. 5 is a cross-sectional view of a bumper energy-absorbing device according to the preferred embodiment at an edge portion of a foam structure.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, a bumper energy-absorbing device according to a preferred embodiment of the present invention includes a bumper skin 1, a foam structure 2, and an impact beam 3, wherein the foam structure 2 is mounted forward on the bumper skin 1 to form a skin assembly, and the skin assembly is mounted rearward on the impact beam 3 to form the bumper energy-absorbing device. In this embodiment, the anti-collision beam 3 is a metal shank beam of the front bumper, and the foam structure 2 can prevent the shank of the pedestrian from being injured due to the collision between the shank of the pedestrian and the metal shank beam, and can play a role in supporting the shank.

Referring to fig. 2, the foam structure 2 includes a middle portion 21, two symmetrical side portions 22, and two symmetrical edge portions 23, wherein the two side portions 22 are fixedly connected to opposite sides of the middle portion 21, and the two edge portions 23 are respectively fixedly connected to the other sides of the side portions 22 opposite to the middle portion 21. The side edge portion 22 has mounting attachment points 22a at locations adjacent to the edge portion 23, through which mounting attachment points 22a fasteners (e.g., screws) are mounted to the bumper skin 1 to effect the attachment fixation of the bumper skin 1 and the foam structure 2.

According to the bumper energy absorption device disclosed by the invention, the supporting range of the shin part of the leg of the pedestrian can be controlled by controlling the shape of the foam structure 2, so that the impact energy absorption effect of the bumper is increased by the foam structure 2. Particularly, the middle portion 21, the side portions 22 and the edge portions 23 respectively have different cross-sectional forms, and the three cross-sectional forms cooperate with each other to prevent the foam structure 2 from slipping during collision, ensure the overlapping amount of the foam structure 2 and the rear-end impact beam 3, and fully utilize the foam energy absorption efficiency to ensure the energy absorption effect of the bumper skin 1.

As shown in fig. 3, the surface of the central part 21 facing the bumper skin 1 is recessed rearward to form a bumper recess 211, and the bumper skin 1 has a correspondingly protruding projection 11, which projection 11 can be snapped into the bumper recess 211 during a crash in order to achieve a stop. In addition, the bumper skin 1 has projecting ribs 12, which ribs 12 can be inserted into the foam structure 2 below the bumper recess 211 during a crash, further limiting. According to the bumper energy absorption device, the bulges 11 and the ribs 12 of the bumper skin 1 work together with the mounting connection points 22a (see fig. 1 and 2) of the foam structure 2, so that the foam structure 2 is prevented from sliding relative to the bumper skin 1 in the collision, and the energy absorption is not sufficient.

As shown in fig. 4, the surface of the side portion 22 facing the impact beam 3 is recessed forward to form an impact beam groove 221, and the impact beam 3 can be clamped into the impact beam groove 221 to realize spacing during collision, so as to ensure the overlapping amount of the foam structure 2 and the impact beam 3, and avoid the foam structure 2 and the impact beam 3 from sliding relatively during collision, which results in insufficient energy absorption.

As shown in fig. 5, the edge portion 23 has a flange 231 bent toward the impact beam 3 and wrapped around both ends of the impact beam 3 to limit the position. In the collision of the low-speed pendulum, the flanging 231 can increase the effective energy absorption space of the corner collision, absorb collision energy more, fully utilize the energy absorption effect of the foam structure 2 and reduce the damage of the bumper part caused by the collision of the corner of the pendulum.

The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.

Claims

1. A bumper energy absorption device, comprising a bumper skin, a foam structure, and an impact beam, wherein the foam structure is mounted between the bumper skin and the impact beam; the surface of the foam structure facing the bumper skin is sunken to form a bumper groove, and the bumper skin is clamped in the bumper groove to be matched; the surface of the foam structure facing the anti-collision beam is sunken to form an anti-collision beam groove, and the anti-collision beam is clamped in the anti-collision beam groove to be matched; the foam structure has the turn-ups of buckling towards the anticollision roof beam, and the turn-ups cladding is in the both ends cooperation of anticollision roof beam.

2. The energy absorber of claim 1, wherein the foam structure has a middle portion and the bumper recess is provided by the middle portion.

3. The energy absorber of claim 2, wherein the foam structure further has side portions fixedly attached symmetrically to opposite sides of the central portion, the impact beam recess being provided by the side portions.

4. The energy absorber of claim 3, wherein the foam structure further includes symmetrically disposed edge portions fixedly attached to opposite sides of the side portions relative to the central portion, the cuff being provided by the edge portions.

5. The energy absorber of claim 4, wherein the side portion has attachment points adjacent the edge portion through which fasteners are attached to the bumper skin.

6. The energy absorber of claim 1, wherein the bumper skin has a protrusion protruding toward the foam structure, the protrusion fitting into a recess in the bumper.

7. The bumper energy absorber of claim 1, wherein the bumper skin has protruding ribs for insertion into the foam structure.

8. The energy absorber of claim 7, wherein the rib is inserted into the foam structure below the bumper recess.

9. The energy absorber of claim 1, wherein the impact beam is a lower leg metal beam of the front bumper.