Car body and car door anti-collision beam assembly

Abstract

A vehicle door anti-collision beam assembly comprises a vehicle door inner plate, a vehicle door anti-collision beam body, a reinforcing inclined strut, a middle supporting plate and an end supporting plate, the middle supporting plate is welded to the lower middle portion of the vehicle door inner plate, the reinforcing inclined strut is obliquely arranged on the vehicle door inner plate, one end of the reinforcing inclined strut is fixed to the middle supporting plate, and the other end of the reinforcing inclined strut is fixed to the end supporting plate. One end of the reinforcing inclined strut is fixed on the vehicle door inner plate, the other end of the reinforcing inclined strut is fixed on the vehicle door inner plate, the vehicle door anti-collision beam main body is arranged below the reinforcing inclined strut, two ends of the reinforcing inclined strut are respectively fixed on the vehicle door inner plate through the end support plates, and the middle part of the vehicle door anti-collision beam main body is fixed on the middle support plate. The reinforcing inclined strut and the vehicle door anti-collision beam main body are welded on the vehicle door inner plate and are fixed on the middle supporting plate, so that the vehicle door anti-collision beam can better cope with new side collision and side column collision laws and regulations, the strength is improved, and meanwhile, the effect of supporting an outer plate is achieved.

Description

Technical Field

[0001] This utility model relates to a door anti-collision beam assembly, belonging to the field of automotive parts technology. Background Technology

[0002] With increasingly stringent automotive safety requirements, side-impact collisions are becoming more complex, demanding higher levels of structural rigidity and energy absorption from the vehicle body. Improving the strength and crashworthiness of car doors has become a crucial task. Currently, car doors typically have a hot-stamped or straight-tube (high-frequency welded pipe) door impact beam inside. This beam protects the door from excessive intrusion during side-impact collisions and prevents deformation of the outer door panel. For example, patent 202022360995.6 discloses a modified door impact beam for frontal and side-impact collisions, comprising a door impact beam, a front door inner panel, and a hinge reinforcement plate. The door impact beam is connected to the front door inner panel and the hinge reinforcement plate located at the front of the door to form a single unit. However, as the requirements for side-impact collisions become more stringent, a single impact beam is no longer sufficient. Its energy absorption capacity is limited during a collision, and the cross-sectional shape of the impact beam may bend and fail during a collision, significantly reducing its energy absorption effect. To improve energy absorption, thicker plates are needed and the cross-sectional depth of the anti-collision beam needs to be increased. This results in severe mold wear and reduced mold life. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a vehicle body and door anti-collision beam assembly. A reinforcing diagonal brace and the main body of the door anti-collision beam are welded to the inner panel of the door. Both are fixed to the central support plate, which can better cope with the new side collision and side pole collision regulations, improve strength, and at the same time serve to support the outer panel.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A vehicle body door anti-collision beam assembly includes a door inner panel, a door anti-collision beam body, a reinforcing diagonal brace, a central support plate, and an end support plate. The central support plate is welded to the lower middle part of the door inner panel. The reinforcing diagonal brace is obliquely disposed on the door inner panel, with one end fixed to the central support plate and the other end fixed to the door inner panel. The door anti-collision beam body is disposed below the reinforcing diagonal brace, with both ends fixed to the door inner panel via the end support plates. The middle part of the door anti-collision beam body is fixed to the central support plate.

[0006] The aforementioned vehicle body door anti-collision beam assembly has an angle α of 20~45° between the main body of the door anti-collision beam and the reinforcing diagonal brace, which strengthens the support strength of the middle part of the outer panel.

[0007] In the aforementioned vehicle body door anti-collision beam assembly, one end of the reinforcing diagonal brace and the middle part of the main body of the door anti-collision beam are both arc welded to the middle support plate. One end of the reinforcing diagonal brace and the middle part of the main body of the door anti-collision beam are respectively provided with one or two welds to the middle support plate. Both ends of the main body of the door anti-collision beam are respectively provided with one or two welds to the end support plate. The length of each weld is 20-30mm.

[0008] The aforementioned vehicle body door anti-collision beam assembly, wherein the main body of the door anti-collision beam is a conformal closed cavity structure, the curved surface of the cavity structure along its length direction is set to follow the curved shape of the outer door panel, the main body of the door anti-collision beam is made of a material with a tensile strength of 780MPa~2000MPa and a material thickness of 1.0~3.0mm, and the material with a tensile strength of 1500~2000MPa is made of hot stamping material.

[0009] The aforementioned vehicle body door anti-collision beam assembly has a cross-sectional shape that is circular, elliptical, irregular polygonal, or has concave ribs.

[0010] The aforementioned vehicle body door anti-collision beam assembly, when the cross-section of the main body of the door anti-collision beam is circular, its diameter is 25~45mm; when the cross-section is elliptical, its minor radius R>5mm; when the cross-section is an irregular polygon, its length-to-width ratio c / d=1.0~3.0; when the cross-section has concave ribs, the depth of the concave ribs e=0~30mm, and the ratio of the depth e to the height f is 0~3 / 4. It is formed using roll forming, liquid filling molding, hot air expansion, or other feasible processes.

[0011] The aforementioned vehicle body door anti-collision beam assembly, wherein the reinforcing diagonal brace is made of hot stamping material with a strength of 1.5GPa or above, and the material thickness is 1.0~1.5mm. The cross-section of the reinforcing diagonal brace is "U" shaped or double-hat shaped.

[0012] The central support plate of the aforementioned vehicle body door anti-collision beam assembly is made of cold-stamped material with a thickness of 1.2~2.0mm.

[0013] The beneficial effects of this utility model are as follows: This utility model adds a central support plate and reinforcing diagonal braces. The reinforcing diagonal braces are made of hot-stamped material, while the central support plate is made of cold-stamped material. The two are connected by arc welding, which can better cope with the new side impact and side pole impact regulations, improve strength, and simultaneously support the outer panel. The addition of the central support plate increases the contact area with the outer panel while improving strength, resulting in better bending resistance. The main body of the door anti-collision beam is made of a high-frequency welded straight tube forming a conformal closed tube. The curved surface of the tubular structure can follow the curved shape of the outer panel, resulting in more uniform glue application gaps and better glue application effect, thus better coping with side impact regulations and improving strength. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of the door anti-collision beam assembly of this utility model;

[0016] Figure 2 This is a schematic diagram of the structural components of the door anti-collision beam assembly.

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the central support plate;

[0018] Figure 4 Schematic diagrams of different cross-sectional structures of the main body of the car door anti-collision beam.

[0019] In the diagram: 1. Inner door panel; 2. Main body of door anti-collision beam; 3. Reinforcing diagonal brace; 4. Middle support plate; 5. End support plate; 6. Weld. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] See Figure 1 This utility model discloses a vehicle body door anti-collision beam assembly, comprising a door inner panel 1, a door anti-collision beam body 2, a reinforcing diagonal brace 3, a central support plate 4, and an end support plate 5. The central support plate 4 is welded to the lower middle part of the door inner panel 1. The reinforcing diagonal brace 3 is obliquely disposed on the door inner panel 1, with one end fixed to the central support plate 4 and the other end fixed to the door inner panel. The door anti-collision beam body 2 is disposed below the reinforcing diagonal brace 3, with both ends of the body welded and fixed to the door inner panel via the end support plate 5. The middle part of the door anti-collision beam body 2 is welded and fixed to the central support plate 4. The addition of the central support plate provides simultaneous support for the reinforcing diagonal brace and the door anti-collision beam body, increasing the overlap with the barrier in side collision conditions and improving side collision performance.

[0022] See Figure 2 One end of the reinforcing diagonal brace 3 and the middle part of the door anti-collision beam body 2 are both arc welded to the middle support plate 4. One end of the reinforcing diagonal brace 3 and the middle part of the door anti-collision beam body 2 are respectively provided with 1-2 welds 6 to the middle support plate 4. Similarly, both ends of the door anti-collision beam body 2 are respectively provided with 1-2 sections of the welds 6 to the end support plate 5, and the length of each weld is 20-30m. The included angle α between the door anti-collision beam body 2 and the reinforcing diagonal brace 3 on the inner panel of the door is 20-45°. This design can better cope with the new C-NCAP whole vehicle side impact and side pole impact regulations, improve strength, and at the same time play a role in supporting the outer panel.

[0023] See Figure 1 and Figure 4, the main body 2 of the door anti-collision beam is a conforming closed cavity tube structure. The curved surface in the length direction of its tube structure is set according to the curved surface shape of the outer door panel of the vehicle. Both ends of the main body of the door anti-collision beam are welded to the end support plates, and the middle part is welded to the middle support plate. The rest is bonded to the outer door panel in the form of glue application. It is set in a conforming manner (conforming to the shape of the outer panel), the glue application gap is more uniform, and the glue application effect is better. It can better meet the side impact regulations and improve the strength. The main body 2 of the door anti-collision beam is made of a material with a tensile strength of 780 MPa to 2000 MPa, and the material thickness is 1.0 to 3.0 mm. It is formed by roll forming, hydroforming, hot gas bulging process or other feasible processes. The cross-section of the main body 2 of the door anti-collision beam is one of a circle, an ellipse, an irregular polygon or with concave ribs. When the cross-section of the main body 2 of the door anti-collision beam is a circle, its diameter is 25 to 45 mm; when the cross-section is an ellipse, its R > 5 mm; when the cross-section is an irregular polygon, the aspect ratio c / d = 1.0 to 3.0; when the cross-section is with concave ribs, the depth e of the concave ribs is 0 to 30 mm, and the ratio of the depth e of the concave ribs to the height f is 0 to 3 / 4.

[0024] See Figure 3 , the reinforcing brace 3 is hot stamped from a hot stamping material with a strength of 1.5 GPa or above, and the material thickness is 1.0 to 1.5 mm. The cross-section of the reinforcing brace is a "U" shape or a double cap shape.

[0025] The middle support plate 4 is made of cold stamping material, such as CR270LA or CR340LA, and its material thickness is 1.2 to 2.0 mm.

Claims

1. A vehicle body and door anti-collision beam assembly, characterized in that: The anti-collision beam assembly includes an inner door panel (1), a main body of the door anti-collision beam (2), a reinforcing diagonal brace (3), a middle support plate (4), and an end support plate (5). The middle support plate (4) is welded to the middle and lower part of the inner door panel (1). The reinforcing diagonal brace (3) is inclined and arranged on the inner door panel (1), with one end fixed to the middle support plate (4) and the other end fixed to the inner door panel. The main body of the door anti-collision beam (2) is arranged below the reinforcing diagonal brace (3), and both ends thereof are fixed to the inner door panel through the end support plates (5). The middle part of the main body of the door anti-collision beam (2) is fixed to the middle support plate (4).

2. The vehicle body and door anti-collision beam assembly according to claim 1, characterized in that: The included angle α between the main body of the door anti-collision beam (2) and the reinforcing diagonal brace (3) is 20° to 45°.

3. The vehicle body and door anti-collision beam assembly according to claim 1, characterized in that: One end of the reinforcing diagonal brace (3) and the middle part of the main body of the door anti-collision beam (2) are both welded to the middle support plate (4) by arc welding. One end of the reinforcing diagonal brace (3) and the middle part of the main body of the door anti-collision beam (2) are respectively provided with 1 to 2 weld seams (6) with the middle support plate (4). Both ends of the main body of the door anti-collision beam (2) are respectively provided with 1 to 2 weld seams (6) with the end support plates (5). The length of each weld seam is 20 to 30 mm.

4. The vehicle body and door anti-collision beam assembly according to claim 1, characterized in that: The main body of the door anti-collision beam (2) is a closed cavity tube structure, and the curved surface in the length direction of its cavity tube structure is arranged in the shape of the curved surface of the outer door panel of the vehicle. The main body of the door anti-collision beam (2) is made of a material with a tensile strength of 780 MPa to 2000 MPa, and the material thickness is 1.0 to 3.0 mm.

5. The vehicle body and door anti-collision beam assembly according to claim 1, characterized in that: The cross-section of the main body of the door anti-collision beam (2) is one of a circle, an ellipse, an irregular polygon, or provided with concave ribs.

6. The vehicle body and door anti-collision beam assembly according to claim 5, characterized in that: When the cross-section of the main body of the door anti-collision beam (2) is a circle, its diameter is 25 to 45 mm; when the cross-section is an ellipse, its R > 5 mm; when the cross-section is an irregular polygon, the aspect ratio c / d = 1.0 to 3.0; when the cross-section is provided with concave ribs, the depth e of the concave ribs is 0 to 30 mm, and the ratio of the depth e of the concave ribs to the height f is 0 to 3 / 4.

7. The vehicle body and door anti-collision beam assembly according to claim 1, characterized in that: The reinforcing diagonal brace (3) is hot-stamped from a hot-stamping material with a strength of 1.5 GPa or above, and the material thickness is 1.0 to 1.5 mm. The cross-section of the reinforcing diagonal brace is a "channel" shape or a double-cap shape.

8. The vehicle body and door anti-collision beam assembly according to claim 1, characterized in that: The middle support plate (4) is made of a cold-stamping material, and its material thickness is 1.2 to 2.0 mm.

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