A kind of anti-collision beam structure capable of improving MPDB compatibility
By optimizing the crash beam structure to a B-shape and adding reinforcements and supports, the problem of barrier penetration in MPDB collisions was solved, thus improving the compatibility score.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LINGYUN INDAL CORP
- Filing Date
- 2025-08-12
- Publication Date
- 2026-08-04
AI Technical Summary
Existing crash beams are prone to causing partial barrier penetration in MPDB crashes, affecting compatibility scores.
The structure adopts a B-shaped main crossbeam structure, combined with a rectangular tubular first reinforcing member, a Z-shaped second reinforcing member, and a C-shaped MPDB bracket. The structural strength and deformation mode of the anti-collision beam are optimized by welding connecting plates and energy-absorbing boxes.
It effectively prevents the formation of hard spots at the energy-absorbing box by the anti-collision beam, reduces localized barrier penetration, and improves the MPDB compatibility score.
Smart Images
Figure CN224589093U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive anti-collision technology, specifically to an anti-collision beam structure that can improve MPDB compatibility. Background Technology
[0002] Vehicle safety has become an increasingly important concern during collisions. Against this backdrop, the China Automotive Technology and Research Center (CATARC) introduced the MPDB (Multi-Purpose Vehicle Assessment) crash test in 2022. In an MPDB frontal offset collision, in addition to assessing occupant safety, the compatibility with the barrier is also evaluated. This aims to prevent situations where a vehicle with high rigidity and safety might cause unexpected deformation of the other vehicle, resulting in significant injury to occupants. The front bumper beam, as the first line of defense for the vehicle body, is the first to contact the barrier. If the Z-axis dimension at the contact point between the front bumper beam and the barrier is small, it will cause a larger localized force on the barrier, leading to partial barrier penetration and a higher MPDB compatibility penalty.
[0003] Furthermore, during an MPDB (Moving Deformable Barrier Offset Collision, where the barrier overlaps the vehicle by 50% of its width) collision, the crash beam deforms simultaneously with the energy-absorbing box immediately upon contact with the barrier, or the crash beam deforms first. Ultimately, after the energy-absorbing box collapses, the crash beam is prone to forming two bending points, such as... Figure 1 As shown, after a 50% offset collision on the left, the anti-collision beam corresponding to the left energy-absorbing box will bend and form a hard point that contacts the barrier, causing partial penetration of the barrier and resulting in a large number of MPDB compatibility penalties. Utility Model Content
[0004] This invention aims to overcome the deficiencies of existing technologies and provide a crash beam structure that can improve MPDB compatibility, thereby solving the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A crash beam structure that can improve MPDB compatibility includes a main crossbeam with a B-shaped cross-section. The main crossbeam consists of a first cavity, a second cavity, and a third cavity. The first and second cavities are located at the upper and lower parts of the main crossbeam, respectively, and are closed cavities. The third cavity is located in the middle of the main crossbeam and is an open cavity with its opening facing backward. A first reinforcing member is provided in the third cavity. The first reinforcing member is a rectangular tubular structure whose shape matches the third cavity. The first reinforcing member is located at the connection between the main crossbeam and the energy-absorbing box. The first cavity has an upper inclined surface at the rear, and the second cavity has a lower inclined surface at the rear. A connecting plate is provided at the rear of the main crossbeam. The connecting plate has an inclined surface that matches the upper and lower inclined surfaces. There are two connecting plates. The energy-absorbing box is connected to the main crossbeam through the connecting plates. MPDB supports are provided at both ends near the main crossbeam, and the MPDB supports are located below the main crossbeam.
[0006] The aforementioned anti-collision beam structure, which can improve MPDB compatibility, has a second reinforcing member installed in the third cavity of the main crossbeam. The second reinforcing member has a Z-shaped structure, and its shape matches the structure of the third cavity. The flange edges on both sides of the Z-shaped second reinforcing member are respectively welded to the rear wall of the first cavity and the rear wall of the second cavity. The second reinforcing member is located in the middle of the main crossbeam.
[0007] The aforementioned anti-collision beam structure that improves MPDB compatibility has an MPDB support structure that is an upward-opening C-shaped structure, with its open ends connected to the front wall and lower wall of the second cavity, respectively.
[0008] The aforementioned anti-collision beam structure, which improves MPDB compatibility, has a first reinforcing member whose length is 2-2.5 times the length of the energy-absorbing box.
[0009] The aforementioned anti-collision beam structure, which improves MPDB compatibility, has a second reinforcing member whose length is 0.5-0.8 times that of the first reinforcing member. Beneficial effects
[0010] Compared with the prior art, this utility model has the following advantages: First, by adding a first reinforcing member to the designed B-shaped main crossbeam, the length of which is greater than the width of the energy-absorbing box, the hard point formed at the energy-absorbing box after the main crossbeam bends during a collision can be effectively prevented, thus preventing localized penetration of the barrier after contact. Second, by setting upper and lower inclined surfaces at the rear of the first and second cavities of the main crossbeam, respectively, wrinkles that are prone to occur in the first and second cavities during the rolling process can be effectively avoided. Connecting plates matching the upper and lower inclined surfaces are also provided, and the energy-absorbing box is then connected to the main crossbeam through the connecting plates, ensuring a reliable connection between the main crossbeam and the energy-absorbing box, and further preventing the formation of a hard point at the energy-absorbing box after the main crossbeam bends. Third, MPDB brackets are set at the two ends near the main crossbeam, further preventing barrier penetration. Attached Figure Description
[0011] The present invention will now be described in further detail with reference to the accompanying drawings.
[0012] Figure 1 This is a schematic diagram of the deformation mode of the main crossbeam in a traditional MPDB (Multi-Level Beam) collision. Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a partial structural cross-sectional view of the present invention; Figure 4 This is another partial structural cross-sectional view of this utility model; Figure 5 This is a partial structural cross-sectional view of the present invention; The labels in the diagram represent: 1. Main crossbeam, 2. First reinforcing member, 3. Connecting plate, 4. Second reinforcing member, 5. MPDB bracket, 6. Energy absorption box, 1-1. First cavity, 1-2. Second cavity, 1-3. Third cavity, 1-4. Upper inclined surface, 1-5. Lower inclined surface. Detailed Implementation
[0013] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0014] like Figure 1-5 As shown, this utility model includes a main crossbeam 1, and the cross-section of the main crossbeam 1 is a B-shaped structure; The main crossbeam 1 is characterized by comprising a first cavity 1-1, a second cavity 1-2, and a third cavity 1-3. The first cavity 1-1 and the second cavity 1-2 are located at the upper and lower parts of the main crossbeam 1, respectively, and are closed cavities. The third cavity 1-3 is located in the middle of the main crossbeam 1 and is an open cavity with its opening facing rearward. This B-shaped structure can be formed by roll forming from a single piece of steel plate. The arrangement of three cavities from top to bottom increases the dimension of the main crossbeam 1 in the vehicle height direction compared to traditional structures, thus preventing excessive local stress on the barrier during a collision and avoiding localized penetration of the barrier.
[0015] A first reinforcing member 2 is provided in the third cavity 1-3. The first reinforcing member 2 is a rectangular tubular structure, and its shape matches the third cavity 1-3. The first reinforcing member 2 is located at the connection between the main crossbeam 1 and the energy-absorbing box 6, that is, it is located on the main crossbeam 1 at the position corresponding to the energy-absorbing box 6. The first reinforcing member 2 and the main crossbeam 1 can be connected by welding. The length of the first reinforcing member 2 is greater than the width of the energy-absorbing box, that is, the dimension of the energy-absorbing box along the vehicle width direction. It can effectively prevent the main crossbeam 1 from bending during the collision and forming a hard point at the energy-absorbing box 6, thereby preventing the barrier from being partially penetrated after contact with the barrier.
[0016] The first cavity 1-1 has an upper inclined surface 1-1-1 at the rear, and the second cavity 1-2 has a lower inclined surface 1-2-1 at the rear. A connecting plate 3 is provided at the rear of the main crossbeam 1. The connecting plate 3 has an inclined surface that matches the upper inclined surface 1-4 and the lower inclined surface 1-5. There are two connecting plates 3. The width of the connecting plate 3 is 1.2-1.5 times the width of the energy-absorbing box 6. The connecting plate 3 is connected to the main crossbeam 1 by welding. The energy-absorbing box 6 is connected to the main crossbeam 1 through the connecting plate 3. The energy-absorbing box 6 is also connected to the connecting plate 3 by welding. An upper inclined surface 1-1-1 is located at the corner where the upper and rear walls of the first cavity 1-1 connect. The purpose of this upper inclined surface 1-1-1 is to reduce wrinkles that easily occur at the connection between the upper and rear walls of the first cavity 1-1 during the rolling process. Wrinkles affect the welding quality and strength between the energy-absorbing box 6 and the main crossbeam. Reducing wrinkles and connecting the main crossbeam 1 to the energy-absorbing box 6 via the connecting plate 3 ensures a reliable connection between the main crossbeam 1 and the energy-absorbing box. It also further prevents hard spots from forming at the energy-absorbing box 6 after the main crossbeam 1 bends. The main crossbeam 1 and the connecting plate 3 are welded together. Similarly, a lower inclined surface 1-2-1 is located at the connection between the lower and rear walls of the second cavity 1-2. The upper inclined surface 1-1-1 and the lower inclined surface 1-2-1... To further prevent barrier penetration, MPDB brackets 5 are installed at both ends near the main crossbeam 1, with the MPDB brackets 5 positioned below the main crossbeam 1. The head of the energy-absorbing box 6 is welded to the connecting plate.
[0017] according to Figure 1 As shown in the MPDB collision deformation mode of the main crossbeam, bending is likely to occur in the middle of the main crossbeam 1 during the MPDB collision. This also aggravates the phenomenon of hard points forming at the energy absorption box 6 of the main crossbeam 1. To reduce the occurrence of this situation, a second reinforcing member 4 can be set in the third cavity 1-3 of the main crossbeam 1. The second reinforcing member 4 has a Z-shaped structure, and its shape matches the structure of the third cavity 1-3. The flange edges on both sides of the Z-shaped second reinforcing member 4 are respectively welded to the rear wall of the first cavity 1-1 and the rear wall of the second cavity 1-2. The second reinforcing member 4 can be set in the middle of the main crossbeam 1.
[0018] The MPDB bracket 5 can be designed as follows: the MPDB bracket 5 has an upward-opening C-shaped structure, and its open end is connected to the front wall and the lower wall of the second cavity 1-2 respectively.
[0019] The front sidewall of the MPDB bracket 5 overlaps the front wall of the second cavity 1-2, and the rear sidewall of the MPDB bracket 5 overlaps the lower wall of the second cavity 1-2 after being bent at the upper opening end.
[0020] The length of the first reinforcing member 2 can be as follows: the length of the first reinforcing member 2 is 2-2.5 times the width of the energy-absorbing box 6.
[0021] The length of the second reinforcing member 4 can be designed as follows: the length of the second reinforcing member 4 is 0.5-0.8 times the length of the first reinforcing member 2.
Claims
1. A crash beam structure that can improve MPDB compatibility, including a main crossbeam (1), wherein the cross section of the main crossbeam (1) is a B-shaped structure; Its features are, The main crossbeam (1) is composed of a first cavity (1-1), a second cavity (1-2) and a third cavity (1-3). The first cavity (1-1) and the second cavity (1-2) are located at the upper and lower parts of the main crossbeam (1) respectively, and are closed cavities. The third cavity (1-3) is located in the middle of the main crossbeam (1) and is an open cavity with its opening facing backward. A first reinforcing member (2) is provided in the third cavity (1-3). The first reinforcing member (2) is a rectangular tubular structure, and its shape matches the third cavity (1-3). The first reinforcing member (2) is located at the connection between the main crossbeam (1) and the energy-absorbing box. The first cavity (1-1) has an upper inclined surface (1-1-1) at the rear of its cross section, and the second cavity (1-2) has a lower inclined surface (1-2-1) at the rear of its cross section. A connecting plate (3) is provided at the rear of the main cross beam (1). The connecting plate (3) has an inclined surface that matches the upper inclined surface (1-4) and the lower inclined surface (1-5). There are two connecting plates (3). The energy-absorbing box (6) is connected to the main cross beam (1) through the connecting plate (3). MPDB brackets (5) are provided at both ends near the main crossbeam (1), and the MPDB brackets (5) are located below the main crossbeam (1).
2. The anti-collision beam structure for improving MPDB compatibility according to claim 1, characterized in that, A second reinforcing member (4) is provided in the third cavity (1-3) of the main crossbeam (1). The second reinforcing member (4) has a Z-shaped structure. The shape of the second reinforcing member (4) matches the structure of the third cavity (1-3). The flange edges on both sides of the Z-shaped second reinforcing member (4) are respectively welded to the rear wall of the first cavity (1-1) and the rear wall of the second cavity (1-2). The second reinforcing member (4) is located in the middle of the main crossbeam (1).
3. The anti-collision beam structure for improving MPDB compatibility according to claim 1, characterized in that, The MPDB support (5) has a C-shaped structure with the opening facing upwards, and its opening end is connected to the front wall and the lower wall of the second cavity (1-2) respectively.
4. The anti-collision beam structure for improving MPDB compatibility according to claim 1, characterized in that, The length of the first reinforcing member (2) is 2-2.5 times the length of the energy-absorbing box (6).
5. The anti-collision beam structure for improving MPDB compatibility according to claim 1, characterized in that, The length of the second reinforcing member (4) is 0.5-0.8 times the length of the first reinforcing member (2).