Roof cross member structure, vehicle body structure, and vehicle

Abstract

The application discloses a roof cross beam structure, a vehicle body structure and a vehicle, relates to the technical field of vehicle body structures, and the roof cross beam structure comprises a cross beam main body which is an integrally-formed tubular structure, and two connecting plates which are respectively connected to the two ends of the cross beam main body and are respectively used for being connected with side wall assemblies on the two sides of the vehicle. Compared with a traditional cross beam main body structure, the integrally-formed tubular structure reduces one part, has higher integration and better comprehensive mechanical properties; welding edges and welding points are omitted, the weight is effectively reduced, and material cost and connection cost are reduced; in the case of the same vehicle longitudinal section area, the top surface width of the cross beam main body can be reduced, the light transmission area of a roof curtain system and the field of view of a roof are increased. The roof cross beam structure can be applied to front cross beams, middle cross beams and rear cross beams of a roof, so that the roof curtain system of the vehicle has better arrangement effects.

Description

Technical Field

[0001] This application relates to the field of vehicle body structure technology, specifically to a roof beam structure, a vehicle body structure, and a vehicle. Background Technology

[0002] The roof crossbeam, as a key component connecting the left and right side panels, plays a crucial role in the vehicle's structure. Currently, most pure electric vehicles utilize panoramic sunroofs, with the sunroof glass bonded to the top surface of the roof crossbeam using adhesive. However, traditional roof crossbeam structures have the following shortcomings or defects in the arrangement of panoramic sunroofs: Figures 1 to 3 As shown, the traditional roof beam structure consists of an upper beam plate, a lower beam plate, and two connecting plates welded together. The main body of the beam is composed of two parts: the upper beam plate and the lower beam plate. The structure has low integration and suffers from relatively high weight, material costs, and connection costs. The front and rear edges of the upper beam plate are welded to the front and rear flanges of the lower beam plate. Due to the presence of the front and rear welded edges, the width of the top surface of the main body of the beam (referring to the longitudinal direction of the vehicle) is relatively wide, which reduces the light transmission area of ​​the panoramic sunroof and has a certain impact on the field of vision. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a roof beam structure, a body structure, and a vehicle to solve at least one of the above-mentioned technical problems.

[0004] In a first aspect, this application provides a roof beam structure, comprising: a beam body, which is an integrally formed tubular structure; and two connecting plates, which are respectively connected to both ends of the beam body and are respectively used to connect to the side panel assemblies on both sides of the vehicle.

[0005] In conjunction with the first aspect, in some optional embodiments, the beam body has a top surface, a bottom surface, a front side surface, and a rear side surface, and each connecting plate includes a beam connecting portion, the beam connecting portion including a bottom plate and a front side plate and a rear side plate bent and formed on the front and rear sides of the bottom plate, the bottom plate, the front side plate, and the rear side plate respectively matching and connecting with the bottom surface, the front side surface, and the rear side surface of the beam body.

[0006] In conjunction with the first aspect, in some alternative embodiments, the upper edges of the front side plate and the upper edges of the rear side plate are bent in opposite directions to form a first guide portion and a second guide portion. The first guide portion is used to guide the bottom surface and the front side surface of the crossbeam body, and the second guide portion is used to guide the bottom surface and the rear side surface of the crossbeam body.

[0007] In conjunction with the first aspect, in some alternative embodiments, the base plate, front side plate, and rear side plate are bolted or welded to the bottom, front, and rear sides of the main body of the crossbeam, respectively.

[0008] In conjunction with the first aspect, in some alternative embodiments, each connecting plate further includes a side panel connection for connecting to the top edge beam of the side panel assembly.

[0009] In conjunction with the first aspect, in some alternative implementations, the top surface of the main beam is used for bonding to the skylight glass.

[0010] In conjunction with the first aspect, in some alternative embodiments, the beam body is provided with at least one of protrusions, grooves, and holes.

[0011] Secondly, this application provides a vehicle body structure, including the roof beam structure in any of the embodiments of the first aspect described above.

[0012] In conjunction with the second aspect, in some optional embodiments, the roof crossbeam structure is applied to at least one of the front crossbeam, middle crossbeam, and rear crossbeam of the roof. Thirdly, this application provides a vehicle including the body structure of any of the embodiments in the second aspect described above.

[0013] Based on the above technical solutions, the roof beam structure, body structure, and vehicle provided in this application feature a one-piece molded tubular structure for the main body of the roof beam. Compared with traditional main beam structures, this structure reduces one component, resulting in higher integration and superior overall mechanical properties. It eliminates welding edges and weld points, effectively reducing weight and lowering material and connection costs. Furthermore, with the same longitudinal cross-sectional area of ​​the vehicle, the top width of the main beam can be reduced, thereby increasing the light-transmitting area of ​​the sunroof and the field of vision on the roof. This roof beam structure can be applied to the front, middle, and rear beams of the roof, enabling a better layout for the vehicle's sunroof system. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a top view schematic diagram of a roof beam in related technologies.

[0016] Figure 2 This is an exploded structural diagram of a roof beam in related technologies.

[0017] Figure 3 for Figure 1 A schematic diagram of the cross section of line AA rotated 90° counterclockwise.

[0018] Figure 4 This is a top view schematic diagram of a roof beam structure provided in an embodiment of this application.

[0019] Figure 5 This is an exploded structural diagram of a roof beam structure provided in an embodiment of this application.

[0020] Figure 6 for Figure 4 A schematic diagram of the cross-section of the middle BB line rotated 90° counterclockwise.

[0021] Figure 7 for Figure 4 A schematic diagram of the cross-section of the CC line rotated 90° counterclockwise.

[0022] Figure 8 This is a partial structural diagram of a vehicle body structure provided in an embodiment of this application.

[0023] Figure 9 This is a structural schematic diagram of the connection between a roof beam structure and a side panel assembly, provided in an embodiment of this application.

[0024] Figure 10 This is a partial structural diagram of a vehicle provided in an embodiment of this application.

[0025] Figure 11 for Figure 10 A cross-sectional schematic diagram of the DD line.

[0026] Reference numerals: 1. Upper crossbeam plate; 2. Lower crossbeam plate; 3. Connecting plate; 4. Glass glue; 100. Roof crossbeam structure; 10. Crossbeam body; 11. Top surface; 12. Bottom surface; 13. Front side; 14. Rear side; 20. Connecting plate; 21. Crossbeam connecting part; 211. Bottom plate; 212. Front side plate; 2121. First guide part; 213. Rear side plate; 2131. Second guide part; 22. Side panel connecting part; 200. Top edge beam; 300. Front sunroof glass; 400. Rear sunroof glass; 500. Interior headliner; 510. Interior headliner clip. Detailed Implementation

[0027] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of them. Based on the description of this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0028] In the description of this application, unless otherwise expressly specified and limited, the terms "connection," "setup," "installation," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0029] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “center,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, 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. Therefore, they should not be construed as limitations on this application.

[0030] The terms “first,” “second,” “third,” etc., are used only to distinguish elements with similar properties, and do not indicate or imply relative importance or a specific order, unless otherwise explicitly stated or limited.

[0031] The terms “comprising,” “including,” “having,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0032] The term "multiple" means two or more (including two).

[0033] The term "and / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone.

[0034] The terms "an embodiment," "as an example," and "in one implementation" refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which may be included in at least one embodiment or example of this application. These illustrative expressions do not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Where there is no conflict, the embodiments and features described in these embodiments can be combined in a suitable manner.

[0035] Figure 4 This is a top view schematic diagram of a roof beam structure 100 provided in an embodiment of this application. Figure 5 This is an exploded structural diagram of a roof beam structure 100 provided in an embodiment of this application, as shown below. Figure 4 and Figure 5 As shown, this application embodiment provides a roof beam structure 100, including a beam body 10 and two connecting plates 20.

[0036] The main body 10 of the crossbeam is a tubular structure integrally formed using an expansion forming process. Compared with the traditional crossbeam main body 10 structure, it reduces one part, has a higher degree of integration, and eliminates welding edges and weld points, effectively reducing weight and lowering material and connection costs. With the same longitudinal cross-sectional area of ​​the vehicle, the width of the top surface 11 of the main body 10 (in the longitudinal direction of the vehicle) is reduced, thereby increasing the light transmission area of ​​the sunroof and the field of vision on the roof. The tubular structure formed by the expansion forming process has stronger torsional resistance and higher tensile strength, with a tensile strength reaching 2GPa and above.

[0037] The bulging process can be either gas bulging or liquid bulging. As an example, the main body 10 of the crossbeam is manufactured using a gas bulging process, including the following steps: tube making – mold pre-pressing – heat treatment – ​​mold closing and sealing – gas inflation and bulging – pressure holding and shaping – cooling and quenching – laser cutting. In the tube making stage, the required material, such as high-strength steel or aluminum alloy, is selected as the blank to form the tube. In the mold pre-pressing stage, the tube is placed into the mold cavity, and the upper and lower molds are closed and pressed together to pre-form the tube into the desired shape. In the heat treatment stage, the pre-formed tube is sent to a heating furnace or resistance heating device and uniformly heated to the material's thermoforming temperature. The heating rate and maximum temperature are controlled to ensure optimized tube structure and properties. In the mold closing and pressing stage, the heated tube is placed into the bulging mold, the mold is closed and the sealing is checked to ensure no leakage of the high-pressure medium. Then, high pressure is applied, causing the tube to be further formed into the desired final shape under the action of the mold. In the inflation and shaping stage, high-pressure gas is introduced into the tube, causing it to expand and adhere to the mold cavity, forming the final shape of the part. In the pressure holding and shaping stage, the mold is held at peak pressure for a certain period to eliminate internal stress and ensure dimensional stability. In the cooling and quenching stage, the formed part is removed from the mold and subjected to rapid cooling treatments such as water quenching or oil quenching. In the laser cutting stage, laser cutting removes excess material, creates holes and shapes, resulting in the final part.

[0038] It should be noted that for pipes made by rolling sheet metal into a tubular shape and then welding the joints during the pipe manufacturing process, there will be a weld seam extending along the length of the pipe. During the expansion forming process, the weld seam can be arranged in the non-directly stressed area of ​​the main body of the crossbeam 10 to avoid affecting the performance of the main body of the crossbeam 10.

[0039] Furthermore, for the main body 10 of the crossbeam with a large curvature, a bending stage can be added after the tube-making stage. The manufactured tube is placed in a special bending mold, and a bending torque is applied to the tube through the mold to shape it into the required curved shape, reducing the difficulty of subsequent bulging. For the main body 10 of the crossbeam with a straight beam or a small curvature, the tube can be directly shaped into the required shape through the bulging pressure gradient.

[0040] The main body of the crossbeam 10 is symmetrical about the longitudinal plane of the vehicle. For example... Figure 6As shown, the main body 10 of the crossbeam has a top surface 11, a bottom surface 12, a front side surface 13, and a rear side surface 14. The top surface 11 serves as the adhesive surface for bonding with the roof glass. The dimensions (including height, width, and wall thickness) of the longitudinal cross-section of the main body 10 can vary, and the amount of cross-section variation will differ depending on the material used for the main body 10. For materials with a tensile strength of 1500 MPa, the cross-section variation is generally less than or equal to 12%. The main body 10 may also have at least one of the following features: protrusions, grooves, and holes. The amount of cross-section variation refers to the relative change in the cross-sectional parameters (height, width, wall thickness, etc.) of the structural component along its length.

[0041] like Figure 4 and Figure 5 As shown, two connecting plates 20 are symmetrically arranged at both ends of the crossbeam body 10 about the longitudinal direction of the vehicle. Each connecting plate 20 includes a crossbeam connecting portion 21 and a side connecting portion 22. The crossbeam connecting portion 21 is used to connect to the end of the crossbeam body 10, such as... Figure 7 As shown, the crossbeam connecting part 21 has a groove-shaped cross section in the longitudinal direction of the vehicle. The crossbeam connecting part 21 includes a base plate 211, a front side plate 212, and a rear side plate 213. The front side plate 212 and the rear side plate 213 are respectively bent into the front and rear sides of the base plate 211. The base plate 211, the front side plate 212, and the rear side plate 213 are respectively matched with the bottom surface 12, the front side surface 13, and the rear side surface 14 of the crossbeam body 10, and can be connected by bolt fastening or arc welding.

[0042] The upper edges of the front side plate 212 and the rear side plate 213 are bent in opposite directions to form a first guide portion 2121 and a second guide portion 2131. The first guide portion 2121 guides the bottom surface 12 and the front side surface 13 of the crossbeam body 10, and the second guide portion 2131 guides the bottom surface 12 and the rear side surface 14 of the crossbeam body 10. Together, the first guide portion 2121 and the second guide portion 2131 ensure that the end of the crossbeam body 10 can smoothly fall into the crossbeam connecting portion 21. The tolerances of the corresponding mating surfaces of the bottom plate 211, the front side plate 212, and the rear side plate 213 with the crossbeam body 10 can adopt unidirectional tolerances to ensure that the assembly process of the crossbeam body 10 and the crossbeam connecting portion 21 only allows adjustment in a preset direction, avoids uncontrollable interference caused by bidirectional floating, and improves assembly controllability.

[0043] Side panel connection 22 is used to connect with the top edge beam 200 of the side panel assembly (see...) Figure 8 , Figure 9 The structure of the side connection part 22 is designed according to the setting of the top edge beam 200, and will not be explained in detail here.

[0044] The connecting plate 20 serves as an intermediate component connecting the main body 10 of the crossbeam and the side assembly. The material can be selected from high-strength steel, die-cast aluminum alloy or other materials according to performance requirements. Among them, high-strength steel can be further improved by hot forming process.

[0045] This application embodiment also provides a vehicle body structure, which includes the aforementioned roof crossbeam structure 100. The roof crossbeam structure 100 can be applied to the front crossbeam, middle crossbeam, and rear crossbeam of the roof. When applied to the front or rear crossbeam, it provides the user with better forward or rearward visibility from the roof. When applied to the middle crossbeam, it provides the user with a larger light-transmitting area and better central visibility from the roof.

[0046] As an example, such as Figure 8 and Figure 9 As shown, the roof crossbeam structure 100 is applied to the middle crossbeam of the roof, and the two connecting plates 20 are spot welded to the top edge beams 200 of the left and right side wall assemblies, respectively.

[0047] This application also provides a vehicle that includes the above-described body structure.

[0048] As an example, such as Figure 10 and Figure 11 As shown, the roof beam structure 100 is applied to the middle beam of the roof. The rear part of the front sunroof glass 300 and the front part of the rear sunroof glass 400 are bonded to the top surface 11 of the beam body 10 by glass glue 4. The interior headliner 500 is snapped into the hole on the bottom surface 12 of the beam body 10 by the interior headliner clip 510.

[0049] In summary, the roof beam structure, vehicle body structure, and vehicle provided in this application embodiment feature a one-piece molded tubular structure for the main body of the roof beam. Compared to traditional main beam structures, this structure reduces one component, resulting in higher integration and superior overall mechanical properties. It eliminates welding edges and weld points, effectively reducing weight and lowering material and connection costs. Furthermore, with the same longitudinal cross-sectional area of ​​the vehicle, the top width of the main beam can be reduced, thereby increasing the light-transmitting area of ​​the sunroof and the field of vision on the roof. This roof beam structure can be applied to the front, middle, and rear roof beams, enabling a better layout for the vehicle's sunroof system.

[0050] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application.

Claims

1. A roof crossbeam structure, characterized in that, include: The main body of the crossbeam is a one-piece tubular structure with a top surface, bottom surface, front side surface, and rear side surface. as well as Two connecting plates are respectively connected to both ends of the main body of the crossbeam and are used to connect to the side panel assemblies on both sides of the vehicle.

2. The roof crossbeam structure according to claim 1, characterized in that, Each of the connecting plates includes a crossbeam connecting portion, which includes a base plate and a front side plate and a rear side plate bent into shape on the front and rear sides of the base plate, respectively. The base plate, the front side plate, and the rear side plate are respectively matched and connected to the bottom surface, the front side surface, and the rear side surface of the crossbeam body.

3. The roof crossbeam structure according to claim 2, characterized in that, The upper edges of the front side plate and the upper edges of the rear side plate are bent in opposite directions to form a first guide portion and a second guide portion. The first guide portion is used to guide the bottom surface and the front side surface of the crossbeam body, and the second guide portion is used to guide the bottom surface and the rear side surface of the crossbeam body.

4. The roof crossbeam structure according to claim 2, characterized in that, The base plate, the front side plate, and the rear side plate are respectively bolted or welded to the bottom, front, and rear sides of the main body of the crossbeam.

5. The roof crossbeam structure according to claim 2, characterized in that, Each of the connecting plates also includes a side panel connection for connecting to the top edge beam of the side panel assembly.

6. The roof crossbeam structure according to claim 1, characterized in that, The top surface of the main beam is used for bonding with the skylight glass.

7. The roof crossbeam structure according to claim 1, characterized in that, The main body of the crossbeam is provided with at least one of the following: protrusions, grooves, and holes.

8. A vehicle body structure, characterized in that, Includes the roof beam structure as described in any one of claims 1-7.

9. The vehicle body structure according to claim 8, characterized in that, The roof crossbeam structure is applied to at least one of the front crossbeam, middle crossbeam, and rear crossbeam of the roof.

10. A vehicle, characterized in that, Including the vehicle body structure as described in claim 8 or 9.

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