Automobile bumper with multi-stage cushioning structure

Abstract

This utility model discloses a car bumper with a multi-stage buffer structure, including a rear bumper. The rear bumper has a raised portion that protrudes outwards. A metal buffer mesh, made of spring steel, is fixed to the outer side of the raised portion. An elastic outer buffer layer, with a honeycomb structure, is fixed to the outer side of the metal buffer mesh. A support plate is fixed inside the rear bumper, and multiple mechanical buffer mechanisms connected to the inner side of the raised portion are mounted on the support plate. These mechanical buffer mechanisms are arranged side-by-side and include a small damper and a compression spring. The small damper is fixed to the support plate, and its piston rod is fixed to one end of the compression spring, while the other end of the compression spring is fixed to the inner side of the raised portion. This utility model, through a triple-layer composite buffer design, effectively reduces impact force and provides higher safety protection.

Description

Technical Field

[0001] This utility model relates to the field of automotive bumper technology, and in particular to an automotive bumper with a multi-level buffer structure. Background Technology

[0002] Car bumpers are important safety components installed at the front and rear of a car body. They are mainly used to absorb and buffer external impact forces to protect the car body, pedestrians and occupants, while also serving a decorative purpose.

[0003] Existing automotive rear bumpers have certain deficiencies in terms of cushioning capacity: some models use only a single layer of plastic material for their rear bumpers, resulting in low elastic modulus and a simple energy-absorbing structure. In low-speed collisions, these bumpers are prone to permanent deformation or even breakage, failing to fully absorb energy through material elastic recovery. While some models are equipped with metal anti-collision beams, their cushioning travel design is insufficient. In high-speed collisions, the impact force is directly transmitted to the vehicle frame, making it difficult to gradually dissipate the force through structural collapse, resulting in inadequate safety protection. Therefore, in response to these shortcomings, there is an urgent need to develop a triple-layer composite cushioning design for automotive bumpers with a multi-stage cushioning structure that can significantly reduce impact force and provide higher safety protection, overcoming the deficiencies in current applications and meeting current needs. Utility Model Content

[0004] The purpose of this invention is to provide a car bumper with a multi-level buffer structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A car bumper with a multi-stage buffer structure includes a rear bumper. The rear bumper has a protruding portion that protrudes outwards. A metal buffer mesh, made of spring steel, is fixed to the outer side of the protruding portion. An elastic outer buffer layer, with a honeycomb structure, is fixed to the outer side of the metal buffer mesh. A support plate is fixed inside the rear bumper. Multiple mechanical buffer mechanisms connected to the inner side of the protruding portion are mounted on the support plate. These mechanical buffer mechanisms are arranged side-by-side. Each mechanical buffer mechanism includes a small damper and a compression spring. The small damper is fixed to the support plate, and its piston rod is fixed to one end of the compression spring. The other end of the compression spring is fixed to the inner side of the protruding portion.

[0007] Preferably, the rear bumper is made of aluminum alloy.

[0008] Preferably, the elastic outer cushioning layer is made of highly elastic thermoplastic polyurethane.

[0009] Preferably, the thickness of the elastic outer buffer layer is 8-10 mm.

[0010] Preferably, the thickness of the metal buffer mesh is 8-10 mm.

[0011] The beneficial effects of this utility model are as follows: When a collision occurs, the car bumper with a multi-stage buffer structure first contacts the elastic outer buffer layer. This layer undergoes elastic deformation to absorb energy. The honeycomb structure within the elastic outer buffer layer makes it easier to disperse the impact force. The impact force then propagates to the metal buffer mesh, which absorbs some energy through elastic deformation and disperses the impact force throughout the rear bumper area. Finally, the impact force causes the raised portion to deform, which in turn compresses the compression spring. The compression spring transmits the impact force to a small damper, which absorbs and converts the impact force, thus significantly reducing the damage caused by the impact. In summary, this utility model, through its triple-layer composite buffer design, effectively reduces impact force and provides higher safety protection. Attached Figure Description

[0012] Other objects and results of this invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings:

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a cross-sectional view of the present invention.

[0015] Legend:

[0016] 1. Rear bumper; 101. Raised section; 2. Metal buffer mesh; 3. Elastic exterior buffer layer; 4. Support plate; 5. Mechanical buffer mechanism; 501. Small damper; 502. Compression spring. Detailed Implementation

[0017] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. It should be pointed out that all accompanying drawings are exemplary representations. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0021] See Figures 1-2In this embodiment of the present invention, a car bumper with a multi-level buffer structure includes a rear bumper 1 made of aluminum alloy. The rear bumper 1 is fixed to the rear of the car by bolts. A protrusion 101 is provided on the rear bumper 1, protruding outwards so that in the event of a collision, the impact first occurs on the protrusion 101. A metal buffer mesh 2 is fixed to the outside of the protrusion 101. The metal buffer mesh 2 is made of spring steel and has a thickness of 8-10mm. In the initial stage of a collision, the metal buffer mesh 2 absorbs some energy through elastic deformation and disperses the impact force throughout the entire rear bumper 1 area. An elastic outer buffer layer 3 is fixed to the outside of the metal buffer mesh 2. The elastic outer buffer layer 3 is made of highly elastic thermoplastic polyurethane, giving it good... The elastic outer trim buffer layer 3 has a honeycomb structure, which can absorb energy through elastic deformation during low-speed collisions and disperse the impact force. The thickness of the elastic outer trim buffer layer 3 is 8-10mm, which can ensure sufficient buffer space without affecting the appearance. A support plate 4 is fixed inside the rear bumper 1. Multiple mechanical buffer mechanisms 5 connected to the inner side of the protrusion 101 are installed on the support plate 4. The multiple mechanical buffer mechanisms 5 are arranged side by side. The mechanical buffer mechanism 5 includes a small damper 501 and a compression spring 502. The small damper 501 is fixed on the support plate 4. The piston rod of the small damper 501 is fixed to one end of the compression spring 502. The other end of the compression spring 502 is fixed to the inner side of the protrusion 101.

[0022] Working principle: When a collision occurs, the car bumper with a multi-stage buffer structure first contacts the elastic outer buffer layer 3. The elastic outer buffer layer 3 undergoes elastic deformation to absorb energy. The honeycomb structure within the elastic outer buffer layer 3 makes it easier to disperse the impact force. The impact force then propagates to the metal buffer mesh 2. The metal buffer mesh 2 absorbs some energy through elastic deformation and disperses the impact force throughout the entire rear bumper 1 area. Finally, the impact force causes the protrusion 101 to deform to a certain extent. The deformation of the protrusion 101 drives the compression spring 502 to compress. The compression spring 502 transmits the impact force to the small damper 501, which absorbs and converts the impact force, thereby effectively reducing the damage caused by the impact.

[0023] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A car bumper with a multi-stage buffer structure, characterized in that, Includes a rear bumper (1), on which a protrusion (101) is provided, the protrusion (101) protruding outward, a metal buffer mesh (2) fixed to the outside of the protrusion (101), the metal buffer mesh (2) being made of spring steel, an elastic exterior buffer layer (3) fixed to the outside of the metal buffer mesh (2), the elastic exterior buffer layer (3) having a honeycomb structure, a support plate (4) fixed inside the rear bumper (1), the support plate (4) having Multiple mechanical buffer mechanisms (5) connected to the inner side of the protrusion (101) are installed. The multiple mechanical buffer mechanisms (5) are arranged side by side. Each mechanical buffer mechanism (5) includes a small damper (501) and a compression spring (502). The small damper (501) is fixed on the support plate (4). The piston rod of the small damper (501) is fixed to one end of the compression spring (502). The other end of the compression spring (502) is fixed to the inner side of the protrusion (101).

2. The car bumper with a multi-stage buffer structure according to claim 1, characterized in that, The rear bumper (1) is made of aluminum alloy.

3. The car bumper with a multi-level buffer structure according to claim 1, characterized in that, The elastic exterior buffer layer (3) is made of highly elastic thermoplastic polyurethane.

4. The car bumper with a multi-stage buffer structure according to claim 3, characterized in that, The thickness of the elastic outer buffer layer (3) is 8-10 mm.

5. The car bumper with a multi-stage buffer structure according to claim 1, characterized in that, The thickness of the metal buffer mesh (2) is 8-10 mm.

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