Automobile bumper with layered energy absorption structure

Abstract

This utility model provides a car bumper with a layered energy-absorbing structure, relating to the field of automotive parts technology. Its features include a fixed bracket, a protective plate fixedly mounted on the front side of the fixed bracket, and connecting ear plates symmetrically arranged on both sides of the fixed bracket. The fixed bracket is a bent bracket, and a groove is provided between the upper part of the fixed bracket and the protective plate. The groove is filled with buffer rubber. A hydraulic damper is fixedly mounted between the connecting ear plates and the protective plate. A license plate frame is fixedly mounted at the middle of the front side of the protective plate. The end of the license plate frame is U-shaped, protruding to the front side of the protective plate, and the width of the front side of the license plate frame is greater than the width of the rear side. This utility model, through the bent structure of the fixed bracket, the buffer rubber in the groove, and the hydraulic damper, forms a multi-stage energy-absorbing system, effectively absorbing collision energy, improving safety, adapting to collision loads at different angles, and improving energy absorption efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically an automotive bumper with a layered energy-absorbing structure. Background Technology

[0002] With the rapid development of the automotive industry, the performance requirements for car bumpers, as an important safety device, are increasing. Traditional car bumpers have certain limitations in terms of materials, structure, and function, making it difficult to meet the diverse needs of modern automobiles for safety, lightweighting, and pedestrian protection.

[0003] In terms of materials, traditional bumpers are mostly made of metal, which, while rigid, is heavy and detrimental to fuel economy and handling. With the development of engineering plastics and composite materials, plastic bumpers have become increasingly common, achieving weight reduction. However, plastic bumpers may have insufficient energy absorption efficiency, especially in high-speed collisions, making it difficult to effectively absorb impact energy and protect occupants and pedestrians.

[0004] In terms of structure, traditional bumpers rely on a relatively simple energy absorption method, primarily depending on the deformation of the inner liner and brackets. This structure may perform well in low-speed collisions, but its energy absorption efficiency will significantly decrease in high-speed or complex-angle collisions. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a car bumper with a layered energy absorption structure, which significantly improves collision safety, lightweight level and pedestrian protection performance.

[0006] This utility model provides a car bumper with a layered energy-absorbing structure. It is characterized by including a fixed bracket, a protective plate fixedly mounted on the front side of the fixed bracket, connecting ear plates symmetrically arranged on both sides of the fixed bracket, the fixed bracket being a bent bracket, a groove provided between the upper part of the fixed bracket and the protective plate, the groove being filled with buffer rubber, a hydraulic buffer fixedly mounted between the connecting ear plates and the protective plate, and a license plate frame fixedly mounted at the middle position of the front side of the protective plate. The end side of the license plate frame is U-shaped, protruding to the front side of the protective plate, and the width of the front side of the license plate frame is greater than the width of the rear side.

[0007] In a preferred embodiment, light holes are symmetrically arranged on both sides of the protective plate, a light box is fixedly arranged on the rear side of the protective plate corresponding to the position of the light holes, and a grille is arranged on the outer side of the light holes.

[0008] In a preferred embodiment, the front center of the guard plate is configured as a boss, and the side of the boss on the front side of the guard plate is configured as an inclined side that slopes inward towards the front.

[0009] In a preferred embodiment, energy-absorbing holes are evenly provided on the lower side of the protective plate and on the upper and lower sides of the license plate frame.

[0010] In a preferred embodiment, a reinforcing rib is provided between the rear side of the guard plate and the fixed bracket.

[0011] In a preferred embodiment, the two ends of the hydraulic buffer are connected to the connecting lug plate and the protective plate respectively via ball joints.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] Multi-stage energy absorption design: Through the bending structure of the fixed bracket, the buffer rubber in the groove and the hydraulic buffer, a multi-stage energy absorption system is formed to effectively absorb collision energy and improve safety.

[0014] High-efficiency buffering system:

[0015] The buffer rubber filling the diaphragm provides initial energy absorption. The hydraulic buffer, as the core energy-absorbing element, automatically adjusts the damping force through a twin-cylinder structure and throttle valve to adapt to different collision speeds.

[0016] High adaptability: The hydraulic buffer is connected at both ends by ball joints, which allows for a certain degree of swing freedom, adapts to collision loads at different angles, and improves energy absorption efficiency.

[0017] Controllable Deformation Structure: The U-shaped license plate frame adopts a variable cross-section design, which generates stable wrinkling deformation upon collision, protecting pedestrians and reducing the risk of license plate detachment.

[0018] Structural reinforcement: Reinforcing ribs are installed between the guard plate and the fixed bracket to improve the overall structural strength.

[0019] Impact force dispersion: The energy-absorbing holes on the lower side of the guard plate and the license plate frame area disperse the impact force and reduce local stress in a frontal offset collision. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the front three-dimensional structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the rear three-dimensional structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the lower three-dimensional structure of this utility model;

[0023] In the diagram: 1-Fixed bracket; 2-Guard plate; 3-Connecting ear plate; 4-Groove; 5-Buffer rubber; 6-Hydraulic buffer; 7-License plate frame; 8-Lamp hole; 9-Lamp box; 10-Grate plate; 11-Energy absorption hole; 12-Reinforcing rib plate; 21-Beveled edge. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figures 1 to 3 As shown

[0026] A car bumper with a layered energy-absorbing structure includes a fixed bracket 1, a protective plate 2 fixedly mounted on the front side of the fixed bracket 1, connecting ear plates 3 symmetrically mounted on both sides of the fixed bracket 1, the fixed bracket 1 being a bent bracket, a groove 4 being provided between the upper part of the fixed bracket 1 and the protective plate 2, the groove 4 being filled with buffer rubber 5, a hydraulic buffer 6 being fixedly mounted between the connecting ear plates 3 and the protective plate 2, a license plate frame 7 being fixedly mounted at the middle position of the front side of the protective plate 2, the end side of the license plate frame 7 being U-shaped, the license plate frame 7 protruding to the front side of the protective plate 2, and the width of the front side of the license plate frame 7 being greater than the width of the rear side.

[0027] The guard plate 2 has symmetrical light holes 8 on both sides, and a light box 9 is fixedly installed on the rear side of the guard plate 2 corresponding to the position of the light holes 8. A grille plate 10 is installed on the outside of the light holes 8.

[0028] The front middle part of the guard plate 2 is set as a boss, and the side of the boss on the front side of the guard plate 2 is set as a sloping side 21 that is inclined to the front and inward.

[0029] Energy-absorbing holes 11 are evenly provided on the lower side of the protective plate 2 and the upper and lower sides of the license plate frame 7.

[0030] A reinforcing rib plate 12 is provided between the rear side of the guard plate 2 and the fixed bracket 1.

[0031] The hydraulic buffer 6 is connected to the connecting ear plate 3 and the guard plate 2 at both ends via ball joints.

[0032] The fixed bracket 1 of this utility model adopts a bending frame design, and its bending angle has been optimized by finite element analysis to form a multi-level deformation gradient during frontal collision. It is recommended to use high-strength aluminum alloy (such as 6061-T6) or glass fiber reinforced nylon composite material to achieve lightweight while ensuring rigidity. The groove 4 set between the guard plate 2 and the fixed bracket 1 forms the first-level crumple space. The filling buffer rubber 5 should be EPDM rubber with a Shore hardness of 50-65, achieving initial energy absorption through closed-cell foaming process, while also possessing temperature resistance from -40℃ to 80℃. The symmetrically arranged hydraulic buffers 6 constitute the core energy absorption system, and their cylinder diameter / piston rod diameter ratio should be ≥3:1 to ensure sufficient stroke. A double-cylinder hydraulic buffer structure is adopted, with a built-in throttle valve that automatically adjusts the damping force according to the impact speed. The ball joint connection method (such as using an AISI 4340 steel chrome-plated ball joint) allows ±15° of swing freedom, adapting to different angle collision loads, and improving energy absorption efficiency compared to a fixed connection. The U-shaped license plate frame 7 employs a variable cross-section design, forming a controllable deformation structure. The front-wide and rear-narrow cross-section generates stable wrinkling deformation upon collision. The energy-absorbing holes 11 can disperse impact force in a frontal offset collision.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A car bumper with a layered energy-absorbing structure, characterized in that, The system includes a fixed bracket (1), a protective plate (2) is fixedly installed on the front side of the fixed bracket (1), and connecting ear plates (3) are symmetrically arranged on both sides of the fixed bracket (1). The fixed bracket (1) is a bending bracket. A groove (4) is provided between the upper part of the fixed bracket (1) and the protective plate (2). The groove (4) is filled with buffer rubber (5). A hydraulic buffer (6) is fixedly installed between the connecting ear plate (3) and the protective plate (2). A license plate frame (7) is fixedly installed at the middle position of the front side of the protective plate (2). The end side of the license plate frame (7) is U-shaped. The license plate frame (7) protrudes to the front side of the protective plate (2). The width of the front side of the license plate frame (7) is greater than the width of the rear side.

2. A car bumper with a layered energy-absorbing structure according to claim 1, characterized in that: The protective plate (2) is provided with lamp holes (8) symmetrically on both sides. A lamp box (9) is fixedly provided on the rear side of the protective plate (2) corresponding to the position of the lamp hole (8). A grid plate (10) is provided on the outer side of the lamp hole (8).

3. A car bumper with a layered energy-absorbing structure according to claim 1, characterized in that: The front middle part of the guard plate (2) is set as a boss, and the side of the boss on the front side of the guard plate (2) is set as a sloping side (21) that is inclined to the front and inward.

4. A car bumper with a layered energy-absorbing structure according to claim 1, characterized in that: Energy-absorbing holes (11) are evenly provided on the lower side of the guard plate (2) and the upper and lower sides of the license plate frame (7).

5. A car bumper with a layered energy-absorbing structure according to claim 1, characterized in that: A reinforcing rib (12) is provided between the rear side of the guard plate (2) and the fixed bracket (1).

6. A car bumper with a layered energy-absorbing structure according to claim 1, characterized in that: The hydraulic buffer (6) is connected to the connecting ear plate (3) and the guard plate (2) at both ends through ball joints.

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