Pedestrian protection device
By designing a combination of longitudinal beam, bottom guard plate and support structure in vehicle bumpers, using hook and cross-release structure, the problem of sinking or flipping of bottom guard plate is solved, and the energy absorption effect of the bumper and pedestrians are improved Protection performance.
Patent Information
- Application Number
- CN202110318432.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-03-25
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2041-03-25
AI Technical Summary
The bottom guard plate of existing vehicle bumpers is easily sinking or flipped during collision, resulting in the inability to effectively absorb energy and affect the pedestrian protection effect.
A pedestrian protection device is designed, including longitudinal beams, bottom guard plates and support structures. Through hook structures and densely distributed cross-release structures, the support structure is fixedly connected to the bottom guard plates to avoid flipping or sinking, and increase the energy absorption effect.
It effectively reduces pedestrian damage and improves low-speed collision performance, especially in low-stance cars and models with bottom guard plates and body mounting points, which significantly improves pedestrian protection performance.
Smart Images
Figure CN112874466B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a front bumper of a vehicle, and more particularly to a pedestrian protection device. 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, since the installation point of the bottom guard plate and the vehicle body is relatively far back, during a collision, the bottom guard plate will sink or flip, resulting in ineffective energy absorption, affecting the collision result. Summary of the invention
[0003] In order to solve the problems of sinking or flipping of the bottom guard plate in the above-mentioned prior art, the present invention provides a pedestrian protection device.
[0004] According to the pedestrian protection device of the present invention, it includes a longitudinal beam, a bottom guard plate and a supporting structure, wherein the longitudinal beam is a metal structure fixedly connected to the vehicle body, the bottom guard plate is a first plastic structure fixedly connected to the vehicle body and arranged below the longitudinal beam, the supporting structure is a second plastic structure fixedly connected to the bottom guard plate and arranged in front of the longitudinal beam, the longitudinal beam includes a hanging hole structure, the supporting structure has a hook structure, and the hook structure is mounted on the hanging hole structure.
[0005] Preferably, the supporting structure is a structure with densely crossed vertical ribs.
[0006] Preferably, the bottom guard plate also includes a transverse vertical rib structure located behind the densely crossed vertical rib structure.
[0007] Preferably, the underbody guard includes a mounting point structure adjacent to the vehicle body, and the underbody guard is mounted on the vehicle body through the mounting point structure to be located below the longitudinal beam.
[0008] Preferably, the support structure is connected to the bottom panel at a location opposite the mounting point structure.
[0009] Preferably, the support structure is integrally connected to the bottom guard plate or fixedly connected via a mounting structure.
[0010] Preferably, the first plastic structure and the second plastic structure are provided by the same material.
[0011] Preferably, the bottom guard plate is fixedly connected to the longitudinal beam by fasteners.
[0012] Preferably, the hanging hole structure includes two hanging holes arranged opposite to each other, and the hook structure includes two hooks arranged opposite to each other, and the hooks are hung in the hanging holes.
[0013] Preferably, the longitudinal beam is a lower leg metal beam of the front bumper.
[0014] The pedestrian protection device according to the present invention provides support for pedestrians through a supporting structure, and prevents the bottom guard plate from flipping over or sinking through a hook structure of the supporting structure. The two cooperate to reduce the injury index to pedestrians. The structure is simple and the cost is low. It 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. The effect is particularly obvious for low-profile sedan models and models where the bottom guard plate and the body installation point are relatively far back. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic diagram of the overall structure of a pedestrian protection device according to a preferred embodiment of the present invention;
[0016] Figure 2 yes Figure 1 A schematic diagram of the structure of the longitudinal beam;
[0017] Figure 3 yes Figure 1 A top view of the bottom guard plate and supporting structure;
[0018] Figure 4 is a cross-sectional view of a pedestrian protection device according to another preferred embodiment of the present invention;
[0019] Figure 5 is a cross-sectional view of a pedestrian protection device according to another preferred embodiment of the present invention. DETAILED DESCRIPTION
[0020] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings and described in detail.
[0021] like Figure 1As shown, a pedestrian protection device according to a preferred embodiment of the present invention includes a longitudinal beam 1, a bottom guard plate 2 and a support structure 3, wherein the longitudinal beam 1 is a metal structure, the bottom guard plate 2 is a first plastic structure arranged below the longitudinal beam 1 to provide bottom protection for the longitudinal beam 1, and the support structure 3 is a second plastic structure arranged in front of the longitudinal beam 1 to provide an energy-absorbing structure with the longitudinal beam 1 to protect the vehicle body and pedestrians, that is, to prevent the longitudinal beam 1 from being directly damaged in a collision, and to prevent pedestrians from being injured by direct collision with the longitudinal beam 1. Specifically, the longitudinal beam 1 and the bottom guard plate 2 are fixedly mounted on the vehicle body, and the support structure 3 is connected to the longitudinal beam 1 and the bottom guard plate 2, respectively. In this embodiment, the longitudinal beam 1 is a metal beam for the calf of the front bumper, and the support structure 3 can prevent the pedestrian's calf from being injured by direct collision with the metal beam, and can also play a supporting role for the calf.
[0022] like Figure 2 As shown, the longitudinal beam 1 includes a main body 11 and a hanging hole structure 12 , wherein the main body 11 extends in a plane, and the hanging hole structure 12 includes two hanging holes arranged at opposite ends of the main body 11 .
[0023] In this embodiment, the bottom guard plate 2 and the support structure 3 are integrally formed. Figure 3 As shown, the bottom guard plate 2 includes a body 21 and a mounting point structure 22, wherein the body 21 extends in a plane, and the mounting point structure 22 is arranged on a side of the bottom guard plate 2 adjacent to the vehicle body. The support structure 3 has a hook structure 31 and is integrally formed on the other side of the bottom guard plate 2 opposite to the mounting point structure 22, and the hook structure 31 includes two hooks arranged at opposite ends.
[0024] Combination Figure 1 The bottom guard plate 2 is mounted on the vehicle body through the mounting point structure 22 to be located below the longitudinal beam 1, and the hook structure 31 of the support structure 3 is mounted on the hanging hole structure 12 of the longitudinal beam 1 to prevent the bottom guard plate 2 and the support structure 3 from turning over or sinking during the collision, thereby avoiding the related problems of not being able to effectively absorb energy due to turning over or sinking and affecting the collision result. In addition, the mounting structure can prevent the lower end of the bumper from sinking due to its own weight and causing the support position of the lower end of the calf to deviate.
[0025] Combination Figure 1 and Figure 3The support structure 3 is a densely cross vertical rib structure, which extends in front of the longitudinal beam 1, which can prevent the calf from directly colliding with the longitudinal beam 1 during a collision and causing injury to the calf, and at the same time can support the calf. The pedestrian protection device according to the present invention can control the support range of the pedestrian's calf tibia by controlling the position of the support structure 3, thereby increasing the energy absorption effect of the bumper collision bottom through the support structure 3. In this embodiment, the bottom guard plate 2 and the support structure 3 are integrally formed from the same modified PP material. Since the Young's modulus of this material is low, it has the ability to collapse and deform during a collision, and the cross vertical rib structure at the rear end can provide an effective support reaction force, so that the lower end of the calf tibia can absorb part of the energy during the collision process, ensuring that the bending moment of the lower part of the calf tibia is not too large to cause a risk of fracture, and at the same time can quickly rebound by the support reaction force, compensate for the bending of the knee joint of the calf during the dumping process, and reduce damage to the knee joint.
[0026] In addition, if Figure 3 As shown, the bottom guard plate 2 also includes a transverse vertical rib structure 23 located behind the densely crossed vertical rib structure. Figure 1 The vertical rib structure 23 is located below the longitudinal beam 1 and cooperates with the support structure 3 to provide sufficient support for the calf.
[0027] like Figure 4 As shown, the support structure 3' of the pedestrian protection device according to another preferred embodiment of the present invention is different from the one-piece molding in the previous embodiment. It is an independent plastic support member, which is installed on the longitudinal beam 1' or the bottom guard plate 2' through the mounting structure. When the independent support structure 3' is installed on the bottom guard plate 2' through the mounting structure, it is suspended on the longitudinal beam 1' through the hook structure 31' to prevent the bottom guard plate 2' from turning over or sinking during the collision.
[0028] like Figure 5 As shown, according to another preferred embodiment of the pedestrian protection device of the present invention, the bottom guard plate 2 ″ is fixedly connected to the longitudinal beam 1 ″ by a fastener 4 to prevent the bottom guard plate 2 ″ from turning over or sinking during a collision.
[0029] 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 pedestrian protection device, characterized in that: The pedestrian protection device includes a longitudinal beam, a bottom guard plate and a supporting structure, wherein the longitudinal beam is a metal structure fixedly connected to the vehicle body, the bottom guard plate is a first plastic structure fixedly connected to the vehicle body and arranged below the longitudinal beam, the supporting structure is a second plastic structure fixedly connected to the bottom guard plate and arranged in front of the longitudinal beam, the longitudinal beam includes a hanging hole structure, the supporting structure has a hook structure, and the hook structure is mounted on the hanging hole structure.
2. The pedestrian protection device according to claim 1, characterized in that: The supporting structure is a densely-covered cross-vertical rib structure.
3. The pedestrian protection device according to claim 2, characterized in that: The bottom guard plate also includes a transverse vertical rib structure located behind the densely crossed vertical rib structure.
4. The pedestrian protection device according to claim 1, characterized in that: The underbody guard includes a mounting point structure adjacent to the vehicle body, and the underbody guard is mounted to the vehicle body through the mounting point structure to be located below the longitudinal beam.
5. The pedestrian protection device according to claim 4, characterized in that: The support structure is connected to the bottom panel at a location opposite the mounting point structure.
6. The pedestrian protection device according to claim 1, characterized in that: The supporting structure is integrally connected to the bottom guard plate or fixedly connected via a mounting structure.
7. The pedestrian protection device according to claim 6, characterized in that: The first plastic structure and the second plastic structure are provided by the same material.
8. The pedestrian protection device according to claim 1, characterized in that: The bottom guard plate is fixedly connected to the longitudinal beam by fasteners.
9. The pedestrian protection device according to claim 1, characterized in that: The hanging hole structure comprises two hanging holes arranged opposite to each other, and the hook structure comprises two hooks arranged opposite to each other, and the hooks are hung in the hanging holes.
10. The pedestrian protection device according to claim 1, characterized in that: The longitudinal beam is the lower metal beam of the front bumper.