Bumper energy absorption device

Abstract

The present invention relates to a bumper energy absorption device, which includes a bumper skin, a foam structure and an anti-collision beam, wherein the foam structure is installed between the bumper skin and the anti-collision beam; the surface of the foam structure facing the bumper skin is concave to form a bumper groove, and the bumper skin is inserted into the bumper groove for cooperation; the surface of the foam structure facing the anti-collision beam is concave to form an anti-collision beam groove, and the anti-collision beam is inserted into the anti-collision beam groove for cooperation; the foam structure has a flange bent toward the anti-collision beam, and the flange is wrapped around both ends of the anti-collision beam for cooperation. The bumper energy absorption device according to the present invention provides energy absorption space and collapse capacity through the foam structure, and the energy absorption structure can be adjusted in multiple directions through the design of the bumper groove, anti-collision beam groove and flange of the foam structure, and has high applicability to various vehicle models.

Description

Technical Field

[0001] The invention relates to a front bumper of a vehicle, and more particularly to an energy absorbing device for the bumper. Background Art

[0002] As the requirements for the appearance and driving safety of automobiles continue to increase, the contradictions in the functional requirements of bumper products are becoming increasingly obvious. As the first component to come into contact with the outside world when a vehicle collides, the bumper needs to meet various collision passive safety regulations. For example, pedestrian protection, low-speed collision, RCAR, etc. All kinds of collision regulations require the bumper to absorb more energy and have a larger crumple space in the X direction to protect the vehicle body and pedestrians. However, the existing energy absorption structure adjustment technology usually only adjusts one energy absorption structure at the front end of the vehicle to achieve the purpose of the vehicle meeting pedestrian protection regulations. However, pedestrian protection is a systematic project. The structural adjustment of a single energy absorption structure cannot be well promoted and has low applicability to other models. Summary of the invention

[0003] In order to solve the problems of low adjustment applicability of the energy absorption structure in the above-mentioned prior art, the present invention provides a bumper energy absorption device.

[0004] According to the bumper energy absorption device of the present invention, it includes a bumper skin, a foam structure and an anti-collision beam, wherein the foam structure is installed between the bumper skin and the anti-collision beam; the surface of the foam structure facing the bumper skin is concave to form a bumper groove, and the bumper skin is snapped into the bumper groove for cooperation; the surface of the foam structure facing the anti-collision beam is concave to form an anti-collision beam groove, and the anti-collision beam is snapped into the anti-collision beam groove for cooperation; the foam structure has a flange bent toward the anti-collision beam, and the flange is wrapped around the two ends of the anti-collision beam for cooperation.

[0005] Preferably, the foam structure has a central portion, the bumper recess being provided by the central portion.

[0006] Preferably, the foam structure further has two side portions symmetrically fixedly connected to opposite sides of the middle portion, and the anti-collision beam groove is provided by the side portion.

[0007] Preferably, the foam structure further has two symmetrically arranged edge parts, the two edge parts are respectively fixedly connected to the other side of the side part opposite to the middle part, and the flange is provided by the edge parts.

[0008] Preferably, the side portion has a mounting connection point at a position adjacent to the edge portion, and the fastener is mounted to the bumper skin through the mounting connection point.

[0009] Preferably, the bumper skin has a protrusion protruding toward the foam structure, and the protrusion is snapped into and fits in a groove of the bumper.

[0010] The bumper skin preferably has protruding ribs for engaging with the foam structure.

[0011] Preferably, the ribs are inserted into the foam structure below the bumper recess.

[0012] Preferably, the anti-collision beam is a lower leg metal beam of the front bumper.

[0013] The bumper energy absorption device according to the present invention provides energy absorption space and collapse capability through a foam structure, and the energy absorption structure is adjusted in multiple directions through the design of the bumper groove, anti-collision beam groove and flange of the foam structure, and has high applicability to various vehicle models. Moreover, the bumper energy absorption device according to the present invention can reduce the injury index to pedestrians through the foam structure, has a simple structure, low cost, can effectively increase the energy absorption effect of the bumper, improve the pedestrian protection performance and the performance of various low-speed collisions, and reduce the damage to pedestrians during collisions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is an exploded view of a bumper energy absorbing device according to a preferred embodiment of the present invention;

[0015] Figure 2 yes Figure 1 A front view of a foam structure;

[0016] Figure 3 is a cross-sectional view of the bumper energy absorbing device according to the preferred embodiment at the middle part of the foam structure;

[0017] Figure 4 is a cross-sectional view of the bumper energy absorbing device according to the preferred embodiment at the side portion of the foam structure;

[0018] Figure 5 It is a cross-sectional view of the edge portion of the foam structure of the bumper energy absorbing device according to the preferred embodiment. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings and described in detail.

[0020] like Figure 1 As shown, a bumper energy absorption device according to a preferred embodiment of the present invention comprises a bumper skin 1, a foam structure 2 and an anti-collision 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 backward on the anti-collision beam 3 to form a bumper energy absorption device. In this embodiment, the anti-collision beam 3 is a calf metal beam of the front bumper, and the foam structure 2 can prevent the pedestrian's calf from colliding with the metal beam and causing calf injury, and can also play a supporting role for the calf.

[0021] Combination Figure 2The 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 the opposite sides of the middle portion 21, and the two edge portions 23 are respectively fixedly connected to the other side of the side portion 22 opposite to the middle portion 21. The side portion 22 has a mounting connection point 22a at a position adjacent to the edge portion 23, and a fastener (such as a screw) is installed on the bumper skin 1 through the mounting connection point 22a to achieve the connection and fixation of the bumper skin 1 and the foam structure 2.

[0022] The bumper energy absorption device according to the present invention can control the support range of the pedestrian's calf tibia by controlling the shape of the foam structure 2, thereby increasing the bumper collision energy absorption effect through the foam structure 2. In particular, the middle part 21, the side part 22 and the edge part 23 respectively present different cross-sectional forms, and the three cross-sectional forms work together to avoid the foam structure 2 from slipping when it is hit, ensure the overlap between the foam structure 2 and the rear end anti-collision beam 3, and make full use of the foam energy absorption efficiency to ensure the energy absorption effect of the bumper skin 1.

[0023] like Figure 3 As shown, the surface of the middle part 21 facing the bumper skin 1 is recessed backward to form a bumper groove 211, and the bumper skin 1 has a corresponding protrusion 11, which can be inserted into the bumper groove 211 to achieve position limiting during a collision. In addition, the bumper skin 1 also has a protruding rib 12, which can be inserted into the foam structure 2 under the bumper groove 211 during a collision to further achieve position limiting. According to the bumper energy absorption device of the present invention, the protrusion 11 and the rib 12 of the bumper skin 1, combined with the installation connection point 22a of the foam structure 2 (see Figure 1 and Figure 2 ) work together to prevent the foam structure 2 from sliding relative to the bumper skin 1 during a collision, which would result in insufficient energy absorption.

[0024] like Figure 4 As shown, the surface of the side portion 22 facing the anti-collision beam 3 is recessed forward to form an anti-collision beam groove 221. The anti-collision beam 3 can be inserted into the anti-collision beam groove 221 to achieve positioning when a collision occurs, thereby ensuring the overlap between the foam structure 2 and the anti-collision beam 3, and avoiding relative slippage between the foam structure 2 and the anti-collision beam 3 during a collision, which would cause insufficient energy absorption.

[0025] like Figure 5 As shown, the edge portion 23 has a flange 231 bent toward the anti-collision beam 3, which covers both ends of the anti-collision beam 3 to achieve position limiting. In a low-speed pendulum collision, the flange 231 can increase the effective energy absorption space of the corner collision, absorb more collision energy, make full use of the energy absorption effect of the foam structure 2, and reduce the damage to the bumper parts caused by the pendulum corner collision.

[0026] The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The above embodiment of the present invention can also be modified in various ways. That is, all simple, equivalent changes and modifications made according to the claims and the description of the present invention fall within the scope of protection of the claims of the present invention. The contents not described in detail in the present invention are all conventional technical contents.

Claims

1. A bumper energy absorption device, It is characterized in that The bumper energy absorption device includes a bumper skin, a foam structure and an anti-collision beam, wherein the foam structure is installed between the bumper skin and the anti-collision beam; the foam structure has a middle part, two symmetrical side parts and two symmetrical edge parts, the two side parts are fixedly connected to the opposite sides of the middle part, the two edge parts are respectively fixedly connected to the other side of the side part opposite to the middle part, the middle part, the side part and the edge part respectively present different cross-sectional forms, the surface of the middle part facing the bumper skin is concave to form a bumper groove, and the bumper skin is snapped into the bumper groove for cooperation; the surface of the side part of the foam structure facing the anti-collision beam is concave to form an anti-collision beam groove, and the anti-collision beam is snapped into the anti-collision beam groove for cooperation; the edge part of the foam structure has a flange bent toward the anti-collision beam, and the flange is covered on both ends of the anti-collision beam for cooperation.

2. The bumper energy absorbing device according to claim 1, It is characterized in that The side portion has a mounting connection point adjacent to the edge portion, through which the fastener is mounted to the bumper skin.

3. The bumper energy absorbing device according to claim 1, It is characterized in that The bumper skin has a protrusion protruding toward the foam structure, and the protrusion is snapped into and fits in a groove of the bumper.

4. The bumper energy absorbing device according to claim 1, It is characterized in that The bumper skin has protruding ribs for insertion into the foam structure.

5. The bumper energy absorbing device according to claim 4, It is characterized in that The ribs are inserted into the foam structure below the bumper recess.

6. The bumper energy absorbing device according to claim 1, It is characterized in that The anti-collision beam is the lower metal beam of the front bumper.

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