Beam front wall assembly and body structure

Abstract

The application relates to a beam type front wall assembly and a vehicle body structure, the beam type front wall assembly comprising a first cross beam, a second cross beam and a third cross beam which are arranged at intervals along a first direction, and a first vertical column and a second vertical column which are arranged at intervals along a second direction, the two ends of the first cross beam, the second cross beam and the third cross beam being connected to the first vertical column and the second vertical column respectively; wherein the first direction is perpendicular to the second direction. A'sun' shaped beam type frame can be formed through the connection of the first cross beam, the second cross beam, the third cross beam, the first vertical column and the second vertical column, the'sun' shaped beam type frame structure is stable, the supporting strength is high, the whole beam type frame can be directly connected with a floor roof cover, and the front wall assembly can be ensured to have sufficient stability during stress transmission. A stable frame supporting structure can be formed between the first vertical column, the first cross beam, the second vertical column and the second cross beam, the supporting structure is beneficial to the installation of a wind window and can improve the installation precision and sealing performance of the wind window and the beam type frame.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, particularly to a beam-type front panel assembly and a vehicle body structure. Background Art

[0002] With the rapid development of the Chinese automobile industry, vehicle manufacturers need to meet the increasingly high requirements of users for safety, reliability, and comfort. Noise and vibration sources such as engines, fans, and transmissions are installed in the front compartment of the vehicle, which affects the driving experience of consumers. As a partition between the front compartment and the driver's cab, the front panel assembly plays a role in reducing or even eliminating the noise and vibration generated by moving parts in the front compartment from entering the driver's cab.

[0003] The front panel is an important part of the front end of the commercial vehicle body-in-white. It can support the body-in-white to meet the safety collision regulations of commercial vehicles and the stiffness requirements of the cab. The front panel assembly generally consists of two layers of plates, namely the inner front panel and the inner front panel reinforcement plate. To ensure the collision strength of the front panel, a front panel cross member is generally included.

[0004] However, there is a problem of insufficient stability in the traditional front panel when transmitting stress to the floor roof at the upper and lower ends. Summary of the Invention

[0005] Based on this, in view of the problem of insufficient stability in the traditional front panel when transmitting stress to the floor roof at the upper and lower ends, it is necessary to provide a beam-type front panel assembly and a vehicle body structure.

[0006] The first aspect of the present application provides a beam-type front panel assembly, which includes a first cross member, a second cross member, and a third cross member arranged at intervals in a first direction, and a first column and a second column arranged at intervals in a second direction. Both ends of the first cross member, the second cross member, and the third cross member are respectively connected to the first column and the second column; wherein, the first direction and the second direction are perpendicular to each other, and the distance between the first cross member and the second cross member is twice the distance between the second cross member and the third cross member.

[0007] The connection between the first cross member, the second cross member, the third cross member, the first column, and the second column can form a "day" - shaped beam-type frame. The "day" - shaped beam-type frame structure is stable and has high supporting strength, which can ensure sufficient stability when the front panel assembly transmits stress.

[0008] In the traditional technology, the front panel assembly includes a front panel outer plate and a front panel reinforcement plate that are connected to each other. However, in the present application, the beam-type frame structure is used to replace the front panel outer plate and the inner front panel, which can save occupied space and reduce the vehicle body weight. Moreover, the channels formed between adjacent beams or columns are also convenient for providing installation space for other components.

[0009] In one embodiment, the first crossbeam is provided with a first limiting port, the second column is provided with a second limiting port, the second crossbeam is provided with a third limiting port facing the first limiting port, and the first column is provided with a fourth limiting port facing the second limiting port. An installation space is formed between the first limiting port, the second limiting port, the third limiting port and the fourth limiting port, and the installation space is used to install the windshield.

[0010] The first, second, third, and fourth limiting ports form an installation space that matches the windshield. In conventional technology, the front bulkhead assembly needs to provide an installation space for the windshield together with the roof assembly or other assemblies. However, this arrangement cannot form a complete windshield, which greatly reduces the installation accuracy of the windshield. With the crossbeam and column arrangement of this application, the body-in-white can form a closed windshield installation space at the sub-assembly stage, which can improve the installation accuracy and sealing performance between the windshield and the front bulkhead assembly, thereby avoiding the problem of windshield leakage.

[0011] In one embodiment, the beam-type front bulkhead assembly further includes a front bulkhead inner panel, which is disposed between the second crossbeam and the third crossbeam, and beam cavities are formed between the front bulkhead inner panel and the second crossbeam, and between the front bulkhead inner panel and the third crossbeam.

[0012] In one embodiment, the inner front panel includes a first side panel, a second side panel, and a third side panel. The third crossbeam includes a first side wall, a second side wall, and a third side wall. The second side panel and the third side panel are respectively connected to both ends of the first side panel and extend toward the direction close to the third crossbeam. The second side wall and the third side wall are respectively connected to both ends of the first side wall and extend toward the direction close to the inner front panel. The second side panel is connected to the second side wall, and the third side panel is connected to the third side wall. The beam cavity is formed by the first side panel, the second side panel, the third side panel, the first side wall, the second side wall, and the third side wall.

[0013] In one embodiment, the front bulkhead assembly further includes a first vertical beam and a second vertical beam spaced apart along a second direction. The first end of the first vertical beam and the first end of the second vertical beam are both connected to the second crossbeam, and the second end of the first vertical beam and the second end of the second vertical beam are both disposed between the third crossbeam and the inner front bulkhead panel.

[0014] In one embodiment, the beam-type front bulkhead assembly further includes a front bulkhead inner panel connected between a second crossbeam and a third crossbeam. The first or second pillar is a target pillar, which includes a first extension section, a second extension section, and a third extension section connected in sequence. The first extension section is used to connect with the first crossbeam, the second extension section is used to connect with the front bulkhead inner panel, and the third extension section is used to connect with the second crossbeam and the third crossbeam.

[0015] In one embodiment, the first upright post includes a main body and a connecting edge disposed around the main body, and the tensile strength of the connecting edge is more than 30% lower than that of the main body.

[0016] In one embodiment, in the first direction, the sizes at both ends of the second cross beam are larger than the size at the middle of the second cross beam, and the sizes at both ends of the third cross beam are larger than the size at the middle of the third cross beam.

[0017] In one embodiment, the second cross beam, the first upright post, and the second upright post are all made of hot-formed steel materials.

[0018] In a second aspect of the present application, a vehicle body structure is provided, which includes a roof assembly, a side wall assembly, the beam-type front panel assembly in any of the above embodiments, and a floor assembly. There are two sets of side wall assemblies, and the two sets of side wall assemblies are respectively disposed on both sides of the roof assembly; the beam-type front panel assembly is connected between the two sets of side wall assemblies; the floor assembly is disposed opposite to the roof assembly, and both the side wall assembly and the beam-type front panel assembly are connected to the floor assembly.

[0019] In the above beam-type front panel assembly, a beam-type frame in the shape of a "day" character can be formed through the connection of the first cross beam, the second cross beam, the third cross beam, the first upright post, and the second upright post. The beam-type frame in the shape of a "day" character has a stable structure and high support strength, and the entire beam-type frame can be directly connected to the floor and roof, which can ensure sufficient stability when the front panel assembly transmits stress. The distance between the first cross beam and the second cross beam is twice the distance between the second cross beam and the third cross beam, which can better adapt to the support strength of commercial vehicles such as trucks. In addition, a stable frame support structure can be formed between the first upright post, the first cross beam, the second upright post, and the second cross beam. This support structure is beneficial to the installation of the windshield and can improve the installation accuracy and sealing performance between the windshield and the beam-type frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the beam-type front panel assembly in an embodiment of the present application.

[0021] Figure 2 is Figure 1 a cross-sectional schematic diagram at the A-A position in

[0022] Figure 3 is Figure 1 a cross-sectional schematic diagram at the B-B position in

[0023] Figure 4 is Figure 1 a cross-sectional schematic diagram at the C-C position in

[0024] Figure 5 It is a schematic diagram of the connecting edge in an embodiment of the present application.

[0025] The attached figures are labeled as follows: front beam assembly 10, first crossbeam 11, limiting port 111, second crossbeam 12, third crossbeam 13, first side wall 131, second side wall 132, third side wall 133, first column 14, second column 15, first extension section 151, second extension section 152, third extension section 153, connecting edge 154, first upright beam 16, second upright beam 17, front inner panel 20, first side panel 21, second side panel 22, third side panel 23, beam cavity 30. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] One embodiment of this application provides a vehicle body structure, which is a white body that has been welded but not yet painted. In the embodiments disclosed in this application, the vehicle body structure is applied to commercial vehicles such as trucks.

[0028] The vehicle body structure includes a roof assembly, side panel assemblies, a beam-type front bulkhead assembly, and a floor assembly. Two sets of side panel assemblies are provided, one on each side of the roof assembly. The beam-type front bulkhead assembly is located on the front side of the cab near the front of the vehicle and connects between the two sets of side panel assemblies. The beam-type front bulkhead assembly also connects between the roof assembly and the floor assembly. The floor assembly is positioned opposite the roof assembly and connects to the side panel assemblies. The beam-type front bulkhead assembly serves to separate the engine compartment and the cab, and also supports and mounts the windshield.

[0029] refer to Figure 1 As shown, the beam-type front bulkhead assembly includes a front bulkhead beam assembly 10 and a front bulkhead inner panel 20. The front bulkhead beam assembly 10 is a frame structure formed by combining several beams and columns. The front bulkhead beam assembly 10 is fixed to one side of the front bulkhead inner panel 20 by spot welding technology. The front bulkhead beam assembly 10 is closer to the cab than the front bulkhead inner panel 20.

[0030] The front bulkhead beam assembly 10 includes a first cross beam 11, a second cross beam 12, a third cross beam 13, a first upright column 14 and a second upright column 15. The first cross beam 11, the second cross beam 12 and the third cross beam 13 are arranged at intervals along the first direction X. The first cross beam 11, the second cross beam 12 and the third cross beam 13 all extend along the second direction Y. The first upright column 14 and the second upright column 15 are arranged at intervals along the second direction Y. Both ends of the first cross beam 11, the second cross beam 12 and the third cross beam 13 are respectively connected to the first upright column 14 and the second upright column 15. The first upright column 14 and the second upright column 15 both extend along the first direction X. The first direction X and the second direction Y are perpendicular to each other. Specifically, the head and tail of the first upright column 14, the first cross beam 11, the second upright column 15 and the third cross beam 13 are connected in sequence. The second cross beam 12 is connected between the first upright column 14 and the second upright column 15. The first cross beam 11, the second cross beam 12, the third cross beam 13, the first upright column 14 and the second upright column 15 jointly form a front bulkhead beam assembly 10 in the shape of a Chinese character 'Ri'. The front bulkhead beam assembly 10 in the shape of a Chinese character 'Ri' has a stable structure and high support strength, and can ensure sufficient stability when the front bulkhead assembly transmits stress.

[0031] In the traditional technology, the front bulkhead assembly includes a front bulkhead outer panel and a front bulkhead reinforcement panel which are connected to each other. In this application, a beam - type frame structure is used to replace the front bulkhead outer panel and the front bulkhead inner panel 20, which can save occupied space and reduce the body weight. Moreover, the channels formed between adjacent beams or columns are also convenient for providing installation space for other components.

[0032] The first cross beam 11 is provided with a first limiting port 111. The second upright column 15 is provided with a second limiting port. The second cross beam 12 is provided with a third limiting port facing the first limiting port 111. The first upright column 14 is provided with a fourth limiting port facing the second limiting port. An installation space is formed between the first limiting port 111, the second limiting port, the third limiting port and the fourth limiting port. The installation space is matched with the windshield. The installation space is used for installing the windshield. The first limiting port 111, the second limiting port, the third limiting port and the fourth limiting port can be a rabbet structure for limiting the windshield. Further, the depth of the limiting port 111 is matched with the thickness of the windshield.

[0033] In the traditional technology, only the part below the windshield is provided in the front bulkhead structure. The front bulkhead assembly needs to cooperate with the roof panel assembly or other assemblies to provide an installation space for the windshield. However, such a setting cannot form a complete windshield opening, which greatly reduces the installation accuracy of the windshield. Through the arrangement of the cross beams and upright columns in this application, a closed windshield installation space can be formed when the white body is in the sub - assembly state, which can improve the installation accuracy and sealing performance between the windshield and the front bulkhead beam assembly 10, and thus avoid the problem of windshield leakage.

[0034] The first crossbeam 11 is made of cold-stamped low-alloy high-strength steel with a tensile strength greater than 590 MPa and a thickness of 1.0 mm; the second crossbeam 12 is made of hot-formed steel with a tensile strength of 1500 MPa and a thickness of 1.2 mm; the third crossbeam 13 is made of cold-stamped low-alloy high-strength steel with a tensile strength greater than 500 MPa and a thickness of 1.5 mm; the first column 14 and the second column 15 are both made of hot-formed steel with a tensile strength of 1500 MPa and a thickness of 1.8 mm. The use of these materials ensures the structural strength of the beam-type front assembly while also reducing its overall weight.

[0035] The second crossbeam 12 connects the first pillar 14 and the second pillar 15, and is located in the middle of the first pillar 14 / second pillar 15. The second crossbeam 12, the first pillar 14, and the second pillar 15 together form an "H"-shaped beam frame. The "H"-shaped beam frame is the main load-bearing component in the front bulkhead assembly 10, and it is made of hot-formed steel. The "H"-shaped high-strength frame formed by high-strength hot-formed steel has good shock resistance and can better resist the impact deformation caused by frontal collisions and A-pillar impacts under passive safety regulations, ensuring the safety of passengers. The vehicle body can meet the collision requirements of GB26512 "Commercial Vehicle Cabin Occupant Protection" regulations, while the body-in-white weight is reduced by 30kg.

[0036] In the first direction X, the dimensions at both ends of the second crossbeam 12 are larger than the dimensions at the middle of the second crossbeam 12, and the dimensions at both ends of the third crossbeam 13 are larger than the dimensions at the middle of the third crossbeam 13. This arrangement can increase the connection stability and strength between the second crossbeam 12, the third crossbeam 13 and the first column 14, the second column 15, thereby improving the overall strength of the frame.

[0037] The spacing between the first crossbeam 11 and the second crossbeam 12 is twice the spacing between the second crossbeam 12 and the third crossbeam 13. This arrangement is better suited to the support strength of commercial vehicles such as trucks.

[0038] Combination Figure 1 , Figure 2 As shown, the front bulkhead assembly 10 also includes a first vertical beam 16 and a second vertical beam 17. Both the first vertical beam 16 and the second vertical beam 17 extend along a first direction X, and are spaced Y apart along a second direction. Both the first vertical beam 16 and the second vertical beam 17 are connected between the second crossbeam 12 and the third crossbeam 13. The first vertical beam 16 and the second vertical beam 17 enhance the structural strength of the entire front bulkhead assembly 10. Furthermore, the ends of the first vertical beam 16 and the second vertical beam 17 furthest from the second vertical beam 17 are inserted between the third crossbeam 13 and the inner front bulkhead panel 20. This arrangement further increases the connection stability of the first vertical beam 16 and the second vertical beam 17, the structural strength of the overall frame, and its resistance to impact forces.

[0039] In the second direction, the dimensions of both ends of the first upright beam 16 are greater than those of the middle part of the first upright beam 16, and the dimensions of both ends of the second upright beam 17 are greater than those of the middle part of the second upright beam 17. This setting can increase the connection stability and strength between the first upright beam 16, the second upright beam 17, the second cross beam 12, and the third cross beam 13.

[0040] The front inner panel 20 is made of cold stamping bake hardening steel with a tensile strength of 360 Mpa and a material thickness of 1.5 mm. It covers the front lower part of the front beam assembly 10. There are beam cavities 30 formed between the front inner panel 20 and the second cross beam 12, the third cross beam 13, the first upright beam 16, and the second upright beam 17. The beam cavities 30 can increase the structural strength and stability of the lower part of the beam-type front end assembly, thereby improving the strength of the overall frame.

[0041] Furthermore, referring to Figure 3 As shown, taking the third cross beam 13 as an example, the beam cavity 30 will be described. The front inner panel 20 includes a first side panel 21, a second side panel 22, and a third side panel 23. The third cross beam 13 includes a first side wall 131, a second side wall 132, and a third side wall 133. The second side panel 22 and the third side panel 23 are respectively connected to both ends of the first side panel 21 and extend towards the direction close to the third cross beam 13. The second side wall 132 and the third side wall 133 are respectively connected to both ends of the first side wall 131 and extend towards the direction close to the front inner panel 20. The second side panel 22 is connected to the second side wall 132, and the third side panel 23 is connected to the third side wall 133. The beam cavity 30 is surrounded by the first side panel 21, the second side panel 22, the third side panel 23, the first side wall 131, the second side wall 132, and the third side wall 133, and the cross section of the beam cavity 30 is approximately in the shape of a "mouth".

[0042] Even further, the beam cavity 30 can absorb or transfer the energy of the external force impact on the vehicle body. The external energy can be sequentially transferred to the side wall assembly through the beam cavity 30 formed by the first upright beam 16 / the second upright beam 17 and the front inner panel 20, and the beam cavity 30 formed by the second cross beam 12 / the third cross beam 13 and the front inner panel 20, which can effectively reduce the impact of the external impact on the cockpit.

[0043] Referring to Figure 4As shown, the two sides of the inner front panel 20 are connected to the first pillar 14 and the second pillar 15, respectively. The following description will use the second pillar 15 as an example to illustrate the connection between the inner front panel 20 and the first pillar 14. The connection position between the first pillar 14 and the inner front panel 20 is the same and will not be repeated here. The second pillar 15 includes a first extension 151, a second extension 152, and a third extension 153 connected in sequence. The first extension 151 is used to connect to the first crossbeam 11, the second extension 152 is used to connect to the inner front panel 20, and the third extension 153 is used to connect to the second crossbeam 12 and the third crossbeam 13. Specifically, the second extension 152 extends from the third extension 153 in a direction away from the first pillar 14 / second crossbeam 12. The surface of the second extension 152 can provide an overlapping surface for the inner front panel 20. The connection between the first pillar 14 and the inner front panel 20 can be achieved at the overlapping surface using spot welding technology.

[0044] refer to Figure 5 As shown, the second column 15 includes a main body and a connecting edge 154 disposed on the periphery of the main body. The second column 15 is connected to the side panel assembly through the connecting edge 154. If the second extension section 152 is not provided, both the outer side panel and the inner front panel 20 of the side panel assembly will be connected to the second column 15 through the connecting edge 154, resulting in a total of three layers of welding at the location of the connecting edge 154. However, with the structural design of the second column 15 in this application, space can be provided for the welding position (connecting edge 154) between the second column 15 and the outer side panel, enabling one-to-one spot welding between the inner front panel 20 and the second extension section 152, and between the connecting edge 154 and the outer side panel. That is, the second column 15 has two places where there are two layers of welding. Compared with three layers of welding, the former has a stronger connection, higher structural strength, and effectively reduces the complexity of the welding process. In this application, the first column 14 and the second column 15 are arranged in the beam-type front bulkhead assembly. The first column 14 / second column 15 are first connected to the inner front bulkhead panel 20, and then connected to the outer side panel. This can avoid the problem of reduced connection stability caused by repeated welding at the same position, and can also reduce the difficulty of the welding process.

[0045] Furthermore, the first column 14 is a thermoformed part, and its strength can be controlled by rapid cooling. For example, slow cooling results in low strength of the first column 14, while rapid cooling results in high strength. During the welding process, the cooling rate is adjusted to create a soft edge region on the connecting edge 154, ensuring that the tensile strength of the connecting edge 154 is more than 30% lower than that of the main body. For example, the tensile strength of the connecting edge 154 can be controlled below 950 MPa. This reduces the difficulty of welding the second column 15 to the side panel. If the second column 15 is too hard, it will lead to problems such as difficulty in adjusting welding process parameters, gaps due to insufficient pressing between the second column 15 and the side panel, and the generation of debris during welding.

[0046] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element 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 application.

[0047] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A beam-type front bulkhead assembly, characterized in that, It includes a first crossbeam, a second crossbeam, and a third crossbeam spaced apart along a first direction, and a first column, a second column, and a front inner panel spaced apart along a second direction. The two ends of the first crossbeam, the second crossbeam, and the third crossbeam are respectively connected to the first column and the second column. The front inner panel is disposed between the second crossbeam and the third crossbeam. A beam cavity is formed between the front inner panel and the second crossbeam, and between the front inner panel and the third crossbeam. Wherein, the first direction is perpendicular to the second direction, and the distance between the first crossbeam and the second crossbeam is twice the distance between the second crossbeam and the third crossbeam; The first crossbeam is provided with a first limiting opening, the second column is provided with a second limiting opening, the second crossbeam is provided with a third limiting opening facing the first limiting opening, and the first column is provided with a fourth limiting opening facing the second limiting opening. An installation space is formed between the first limiting opening, the second limiting opening, the third limiting opening and the fourth limiting opening, and the installation space is used to install the windshield. The first or second column is a target column, which includes a first extension section, a second extension section and a third extension section connected in sequence. The first extension section is used to connect with the first crossbeam, the second extension section is used to connect with the inner front panel, and the third extension section is used to connect with the second and third crossbeams. The second extension section extends from the third extension section in a direction away from the second crossbeam. The surface of the second extension section can provide an overlap surface for the inner front panel. The connection between the first column and the inner front panel can be achieved at the overlap surface by spot welding technology.

2. The beam-type front bulkhead assembly according to claim 1, characterized in that, The front inner panel includes a first side panel, a second side panel, and a third side panel. The third crossbeam includes a first side wall, a second side wall, and a third side wall. The second side panel and the third side panel are respectively connected to both ends of the first side panel and extend towards the third crossbeam. The second side wall and the third side wall are respectively connected to both ends of the first side wall and extend towards the front inner panel. The second side panel is connected to the second side wall, and the third side panel is connected to the third side wall. The beam cavity is formed by the first side panel, the second side panel, the third side panel, the first side wall, the second side wall, and the third side wall.

3. The beam-type front bulkhead assembly according to claim 1, characterized in that, The front bulkhead assembly also includes a first vertical beam and a second vertical beam spaced apart along the second direction. The first end of the first vertical beam and the first end of the second vertical beam are both connected to the second crossbeam. The second end of the first vertical beam and the second end of the second vertical beam are both located between the third crossbeam and the inner front bulkhead panel.

4. The beam-type front bulkhead assembly according to claim 1, characterized in that, The first column includes a main body and a connecting edge disposed around the periphery of the main body, wherein the tensile strength of the connecting edge is more than 30% lower than the tensile strength of the main body.

5. The beam-type front bulkhead assembly according to claim 1, characterized in that, In the first direction, the dimensions at both ends of the second crossbeam are greater than the dimensions at the middle of the second crossbeam, and the dimensions at both ends of the third crossbeam are greater than the dimensions at the middle of the third crossbeam.

6. The beam-type front bulkhead assembly according to any one of claims 1-5, characterized in that, The second crossbeam, the first column, and the second column are all made of hot-formed steel.

7. A vehicle body structure, characterized in that, include: Top cover assembly; The side panel assembly is provided in two sets, and the two sets of the side panel assembly are respectively provided on both sides of the top cover assembly; The beam-type front fascia assembly as described in any one of claims 1-5, wherein the beam-type front fascia assembly is connected between the two sets of said side fascia assemblies; and The floor assembly is disposed opposite to the roof assembly, and the side panel assembly and the beam-type front panel assembly are both connected to the floor assembly.

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