Automobile bumper with a buffer structure

Abstract

The application discloses a kind of automobile bumpers with buffer structure, it is related to the technical field of automobile accessories, bumper includes front structure, rear structure, intermediate structure and fire-retardant structure, intermediate structure is arranged between front structure and rear structure, rear structure is connected to vehicle body structure by fire-retardant structure, fire-retardant structure includes annular cavity, annular cavity outer periphery is provided with fire-retardant cavity and buffer cavity, buffer cavity is arranged at the both sides of fire-retardant cavity, fire-retardant cavity and buffer cavity are provided with the communication surface of partial communication, a plurality of pore structures are provided on the communication surface, expandable material is arranged in fire-retardant cavity, buffer cavity is divided into several fire-retardant sections by annular cavity, front structure and rear structure form bumper structure of vehicle body, intermediate structure forms buffer structure of vehicle body, fire-retardant structure forms fire-retardant protective structure of vehicle body, for protecting vehicle body when accident occurs.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts technology, and specifically relates to an automotive bumper with a buffer structure. Background Technology

[0002] With the development of the automotive industry and the widespread application of engineering plastics, car bumpers, as an important safety device, have also undergone innovation. Currently, in addition to maintaining their original protective functions, front and rear bumpers must also strive for harmony and unity with the vehicle's design, and achieve lightweight construction. The front and rear bumpers of passenger cars are made of plastic, hence the term "plastic bumpers." Generally, bumpers serve to absorb energy and protect the car in the event of an accident such as a collision. However, current bumpers with protective buffer structures do not offer sufficient protection; they only provide a certain degree of cushioning and do not provide fire resistance. During a collision, the point of impact generates instantaneous high temperatures, which can easily lead to the car exploding or bursting into flames. Summary of the Invention

[0003] To achieve the above objectives, the technical solution of the present invention is as follows: a car bumper with a buffer structure, the bumper including a front structural component, a rear structural component, a middle structural component and a flame-retardant structural component, the middle structural component being disposed between the front structural component and the rear structural component, and the rear structural component being connected to the vehicle body structure through the flame-retardant structural component.

[0004] Based on the above technical solution, the front and rear structural components form the bumper structure of the vehicle body, the middle structural component forms the buffer structure of the vehicle body, and the flame-retardant structural component forms the flame-retardant protective structure of the vehicle body, which is used to protect the vehicle body in the event of an accident.

[0005] As an improvement of the present invention, the flame-retardant structure includes an annular cavity, a flame-retardant cavity and a buffer cavity are provided on the outer periphery of the annular cavity, the buffer cavity is located on both sides of the flame-retardant cavity and has a small volume, the flame-retardant cavity and the buffer cavity are provided with a partially connected surface, the connected surface is provided with a number of porous structures, the flame-retardant cavity is provided with an expandable material, and the buffer cavity divides the annular cavity into a number of flame-retardant segments.

[0006] Based on the above technical solution, the annular cavity forms a filling cavity for flame-retardant material, which is used to fill the entire annular cavity after the flame-retardant material is released, thereby producing a flame-retardant effect. The flame-retardant cavity is used to place the flame-retardant material, and the buffer cavity is used for the normal expansion of the flame-retardant material. In a normal high-temperature environment, the expanding material (which can be expanded graphite) spreads in the buffer layer and undergoes a small expansion. When a violent collision occurs and instantaneous high temperature is generated, the high temperature generated at the violent collision point causes the expanded graphite to bulge out through the bulging structure and fill the annular cavity, thus flame-retarding the entire front panel of the bumper and preventing the vehicle body from exploding instantly.

[0007] As an improvement of the present invention, a bulging structure is provided on the inner annular surface of the annular cavity. The bulging structure includes a break layer and a bulging layer. The break layer and the bulging layer are connected to form the inner annular surface of the annular cavity. The break layer is provided with a break surface, a connecting cavity and a connecting surface. In the non-stressed state, the break surface is in a fitted state, and the thickness of the break surface is less than the sum of the thicknesses of the connecting cavity and the connecting surface.

[0008] Based on the above technical solution, the bulging structure is used to wrap and isolate the flame-retardant material in the flame-retardant cavity under normal vehicle conditions. Its disconnected surface facilitates the flame-retardant material to pass smoothly through the connecting cavity and break through the connecting surface and the thin film layer to enter the annular cavity. In this invention, the bulging structure is a flexible structure as a whole.

[0009] As an improvement of the present invention, the connecting surface is connected to the bulging layer, the bulging layer is provided with a thin film layer, and the thin film layer is composed of a plurality of thin film surfaces.

[0010] As an improvement of the present invention, a blocking ring is provided on the connecting surface between the flame-retardant cavity and the buffer cavity. The blocking ring forms a blocking surface and a non-blocking surface on the connecting surface between the flame-retardant cavity and the buffer cavity. Several pores are provided on the non-blocking surface, and the area of ​​the non-blocking surface is smaller than the area of ​​the blocking surface.

[0011] Based on the above technical solution, preferably, the area of ​​the non-blocking surface is at least less than half the area of ​​the blocking surface, and the area of ​​the non-blocking surface should not be too large, otherwise, at the moment of collision of the vehicle body, the graphite should enter the annular cavity as much as possible.

[0012] As an improvement of the present invention, an adhesive mesh structure is provided on the non-blocking surface, the adhesive mesh structure is connected to the blocking ring around its perimeter, and a number of holes are provided on the adhesive mesh structure.

[0013] Based on the above technical solution, the function of the adhesive mesh structure is to isolate the flame-retardant material, and the pore density of the adhesive mesh should be as large as possible than the density of the colliding material.

[0014] As an improvement of the present invention, the intermediate structural component includes a buffer layer and a spring assembly. The spring assembly includes a spring and a transmission rod. One end of the spring is connected to the buffer layer, and the other end is connected to the transmission rod. The other end of the transmission rod is connected to the rear structural component.

[0015] As an improvement of the present invention, a buffer cavity is provided in the buffer layer, and a buffer material is provided in the buffer cavity.

[0016] Based on the above technical solution, the vehicle body is buffered and protected by a buffer layer and spring assembly.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention forms a buffer protection for the vehicle body through a buffer layer and a spring assembly. The front and rear structural components form the bumper structure of the vehicle body, and the middle structural component forms the buffer structure of the vehicle body. When a violent collision generates instantaneous high temperature, the high temperature generated at the point of violent collision causes the expanded graphite to bulge out through the bulging structure and fill the annular cavity, thus retardant the front baffle of the entire bumper and preventing the vehicle body from exploding instantly. The flame-retardant structural component forms a flame-retardant protective structure for the vehicle body, which is used to protect the vehicle body in the event of an accident. The structure in the present invention is easy to implement, has low manufacturing cost, and strong protective performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall installation structure of the car bumper in this embodiment;

[0019] Figure 2 This is a partial structural diagram of the flame-retardant structural component in this embodiment;

[0020] Figure 3 For this embodiment Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 For this embodiment Figure 2 Enlarged view of section B in the middle.

[0022] List of reference numerals in the attached diagram: 1-Front structural component, 2-Rear structural component, 3-Intermediate structural component, 4-Flame-retardant structural component, 5-Annular cavity, 6-Flame-retardant cavity, 7-Buffer cavity, 8-Disconnection surface, 9-Connecting cavity, 10-Connecting surface, 11-Thin film layer, 12-Blocking ring, 13-Adhesive mesh structure, 14-Buffer layer, 15-Spring, 16-Transmission rod, 17-Buffer material, 18-Expansion material, 19-Porous structure, 20-Vehicle body. Implementation

[0023] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0024] Example: This example is a car bumper with a buffer structure. The bumper includes a front structural component 1, a rear structural component 2, a middle structural component 3, and a flame-retardant structural component 4. The middle structural component 3 is disposed between the front structural component 1 and the rear structural component 2. The rear structural component 2 is connected to the vehicle body 20 structure through the flame-retardant structural component 4. The front structural component 1 and the rear structural component 2 form the bumper structure of the vehicle body 20, the middle structural component 3 forms the buffer structure of the vehicle body 20, and the flame-retardant structural component 4 forms the flame-retardant protective structure of the vehicle body 20, which is used to protect the vehicle body 20 in the event of an accident.

[0025] Furthermore, the flame-retardant structural component 4 includes an annular cavity 5. A flame-retardant cavity 6 and a buffer cavity 7 are arranged around the annular cavity 5. The buffer cavity 7 is located on both sides of the flame-retardant cavity 6. The flame-retardant cavity 6 and the buffer cavity 7 have a partially connected surface. Several porous structures 19 are provided on the connected surface. An expandable material 18 is placed inside the flame-retardant cavity 6. The buffer cavity 7 divides the annular cavity 5 into several flame-retardant sections. The annular cavity 5 forms a filling cavity for the flame-retardant material, used to fill the entire annular cavity 5 after the flame-retardant material is released, thus producing a flame-retardant effect. The flame-retardant cavity 6 is used to hold the flame-retardant material, and the buffer cavity 7 is used for the normal expansion of the flame-retardant material. In a normal high-temperature environment, the expandable material 18 (which can be expanded graphite) spreads in the buffer layer 14 and undergoes a small amount of expansion. When a violent collision generates instantaneous high temperatures, the high temperature generated at the point of violent collision causes the expanded graphite to bulge out through the bulging structure, filling the annular cavity 5 and flame-retarding the entire front bumper panel, preventing the vehicle body 20 from instantly exploding.

[0026] Furthermore, a bulging structure is provided on the inner annular surface of the annular cavity 5. The bulging structure includes a break layer and a bulging layer. The break layer and the bulging layer are connected to form the inner annular surface of the annular cavity 5. The break layer is provided with a break surface 8, a connecting cavity 9 and a connecting surface 10. In the non-stressed state, the break surface 8 is in a fitted state. The thickness of the break surface 8 is less than the sum of the thicknesses of the connecting cavity 9 and the connecting surface 10. The bulging structure is used to wrap and isolate the flame-retardant material in the flame-retardant cavity 6 under normal vehicle conditions. Its break surface 8 facilitates the flame-retardant material to pass smoothly through the connecting cavity 9 and break through the connecting surface 10 and the thin film layer 11 to enter the annular cavity 5. In this invention, the bulging structure as a whole is a flexible structure.

[0027] Furthermore, the connecting surface 10 is connected to the bulging layer, and the bulging layer is provided with a thin film layer 11, which is composed of several thin film surfaces.

[0028] Furthermore, a blocking ring 12 is provided on the connecting surface between the flame-retardant cavity 6 and the buffer cavity 7. The blocking ring 12 forms a blocking surface and a non-blocking surface on the connecting surface between the flame-retardant cavity 6 and the buffer cavity 7. Several pores are provided on the non-blocking surface. The area of ​​the non-blocking surface is smaller than the area of ​​the blocking surface. Preferably, the area of ​​the non-blocking surface is at least less than half the area of ​​the blocking surface. The area of ​​the non-blocking surface should not be too large, otherwise, at the moment of collision of the vehicle body 20, the graphite should enter the annular cavity 5 as much as possible.

[0029] Furthermore, an adhesive mesh structure 13 is provided on the non-blocking surface. The adhesive mesh structure 13 is connected to the blocking ring 12 on all four sides. Several pores are provided on the adhesive mesh structure 13. The function of the adhesive mesh structure 13 is to isolate the flame-retardant material. The pore density of the adhesive mesh is as high as possible than the density of the impacting material.

[0030] Furthermore, the intermediate structural component 3 includes a buffer layer 14 and a spring 15 assembly. The spring 15 assembly includes a spring 15 and a transmission rod 16. One end of the spring 15 is connected to the buffer layer 14, and the other end is connected to the transmission rod 16. The other end of the transmission rod 16 is connected to the rear structural component 2.

[0031] Furthermore, a buffer cavity 7 is provided inside the buffer layer 14, and a buffer material 17 is provided inside the buffer cavity 7. The buffer layer 14 and the spring 15 assembly form a buffer protection for the vehicle body 20.

[0032] It should be noted that the above content merely illustrates the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, various improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A car bumper with a buffer structure, characterized in that, The bumper includes a front structural component (1), a rear structural component (2), a middle structural component (3), and a flame-retardant structural component (4). The middle structural component (3) is located between the front structural component (1) and the rear structural component (2). The rear structural component (2) is connected to the vehicle body (20) structure through the flame-retardant structural component (4). The flame-retardant structure includes an annular cavity (5). A flame-retardant cavity (6) and a buffer cavity (7) are provided on the outer periphery of the annular cavity (5). The buffer cavity (7) is located on both sides of the flame-retardant cavity (6). The flame-retardant cavity (6) and the buffer cavity (7) are provided with a partially connected surface. Several pore structures (19) are provided on the connected surface. An expandable material (18) is provided inside the flame-retardant cavity (6). The buffer cavity (7) divides the annular cavity (5) into several flame-retardant segments. A bulging structure is provided on the inner annular surface of the annular cavity (5). The bulging structure includes a break layer and a bulging layer. The inner ring surface of the annular cavity (5) is connected to form the annular cavity. The disconnected layer is provided with a disconnected surface (8), a connecting cavity (9) and a connecting surface (10). In the non-stressed state, the disconnected surface (8) is in a close-fitting state. The thickness of the disconnected surface (8) is less than the sum of the thicknesses of the connecting cavity (9) and the connecting surface (10). The connecting surface (10) is connected to the bulging layer. The bulging layer is provided with a thin film layer (11). The thin film layer (11) is composed of several thin film surfaces. A blocking ring (12) is provided on the connecting surface between the flame-retardant cavity (6) and the buffer cavity (7). The blocking ring (12) forms a blocking surface and a non-blocking surface on the connecting surface between the flame-retardant cavity (6) and the buffer cavity (7). The area of ​​the non-blocking surface is less than the area of ​​the blocking surface. An adhesive mesh structure (13) is provided on the non-blocking surface. The adhesive mesh structure (13) is connected to the blocking ring (12) around its perimeter. Several pores are provided on the adhesive mesh structure (13).

2. A car bumper with a buffer structure according to claim 1, characterized in that, The intermediate structural component (3) includes a buffer layer (14) and a spring assembly. The spring assembly includes a spring (15) and a transmission rod (16). One end of the spring (15) is connected to the buffer layer (14), and the other end is connected to the transmission rod (16). The other end of the transmission rod (16) is connected to the rear structural component (2).

3. A car bumper with a buffer structure according to claim 2, characterized in that, A buffer cavity is provided inside the buffer layer (14), and a buffer material (17) is provided inside the buffer cavity.

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