A car roof assembly

Abstract

This invention discloses an automotive roof assembly, including an outer roof panel, a sunroof mounting reinforcement plate, a front crossbeam structure, and a rear crossbeam structure. The sunroof mounting reinforcement plate, the front crossbeam structure, and the rear crossbeam structure are all located on the back of the outer roof panel, with the sunroof mounting reinforcement plate corresponding to a sunroof opening on the outer roof panel. It also includes a front connecting bracket, a middle connecting bracket, and a rear connecting bracket for connecting to corresponding side panels. The front connecting bracket is welded to the end of the front crossbeam structure, forming a closed crossbeam structure. The middle connecting bracket is connected to the side panel of the sunroof mounting reinforcement plate, and the rear connecting bracket is correspondingly connected to the rear end of the sunroof mounting reinforcement plate. By forming an integrated reinforced assembly structure, the compressive strength, torsional stiffness, bending stiffness, and modal characteristics of the vehicle body frame assembly are improved, thereby enhancing the overall performance of the vehicle and the ride comfort.

Description

Technical Field

[0001] This invention relates to the field of automotive body technology, and in particular to an automotive roof assembly. Background Technology

[0002] With the upgrading of automobile consumption, consumers' demand for sunroof configurations is constantly increasing. The configuration rate of sunroofs in newly developed and designed models continues to rise, and some cars have already made it a standard feature. Sunroofs can realize functions such as lighting, ventilation, heat exchange, and viewing the sky and night view, and their size is also constantly increasing. Sunroofs are fixed to the car's roof with bolts or clips.

[0003] The car roof is the most important component of the upper part of the vehicle's frame. The left and right side assemblies are connected through the roof assembly to form the overall body frame assembly. An improperly designed roof frame structure often leads to substandard torsional stiffness and modal characteristics of the body frame. This results in NVH (Noise, Vibration, and Harshness) issues such as vibration and noise from the sunroof when driving on bumpy roads, significantly impacting ride comfort. These problems are also among the top complaints in automotive after-sales service.

[0004] Meanwhile, the roof assembly must meet the requirements of the Chinese national standard GB26134 "Roof Crush Resistance of Passenger Cars". According to the national standard, the minimum load factor of the roof of a passenger car should not be less than 3.0 to ensure that the roof will not collapse in the event of a rollover accident. Similar requirements exist in the US standard 49CFR Part 571 FMVSS216 FMVSS216a "Roof Crush Resistance" and the Canadian standard CMVSS216 "Roof Crush Resistance". Therefore, the car roof structure is very important, serving as a load-bearing structure for vehicle safety, especially for protecting occupants during rollovers. Currently, car roof designs often compromise the roof's crush resistance in order to meet the demand for large sunroofs, resulting in a compromise.

[0005] For example, Chinese patent CN217893080U discloses a panoramic sunroof roof mounting assembly for automobiles. This panoramic sunroof roof mounting assembly includes a sunroof mounting plate. The front and rear ends of the sunroof mounting plate are detachably connected to the front roof crossbeam and the rear roof crossbeam, respectively. The left and right sides of the sunroof mounting plate are detachably connected to the corresponding side inner panels after they extend and overlap towards each other. The sunroof mounting plate is circumferentially bonded to the roof. The compressive strength of this sunroof roof structure is relatively weak. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an automotive roof assembly that effectively improves the compressive strength of the vehicle roof structure.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] The automobile roof cover assembly includes an outer roof panel, a skylight installation reinforcement plate, a front crossbeam structure, and a rear crossbeam structure. The skylight installation reinforcement plate, the front crossbeam structure, and the rear crossbeam structure are all arranged on the back of the outer roof panel. The skylight installation reinforcement plate is arranged corresponding to the skylight hole opened on the outer roof panel; it also includes a front connection bracket, a middle connection bracket, and a rear connection bracket for connecting with the corresponding side wall; the front connection bracket is welded to the end of the front crossbeam structure, and the front crossbeam structure forms a closed crossbeam structure; the middle connection bracket is connected to the side plate of the skylight installation reinforcement plate, and the rear connection bracket is correspondingly connected to the rear end of the skylight installation reinforcement plate.

[0009] Furthermore:

[0010] The front end of the outer roof panel is provided with a flanging flange surface, the rear end of the outer roof panel is provided with a concave water trough structure, and a reinforcing rib is arranged longitudinally in the concave water trough structure.

[0011] The front end of the front crossbeam structure is provided with a front end flange surface, the front end flange surface is connected to the outer roof panel, the rear end of the front crossbeam structure is provided with a front crossbeam groove, and structural adhesive is filled in the front crossbeam groove to connect with the outer roof panel.

[0012] The longitudinal section of the front crossbeam structure is in a U-shaped structure.

[0013] The skylight installation reinforcement plate includes a pair of side plates, a front end plate arranged between the front ends of the pair of side plates, and a rear end plate arranged between the rear ends of the pair of side plates. After the pair of side plates, the front end plate, and the rear end plate are welded together, they are integrally formed by stamping.

[0014] The thickness of the front end plate and the rear end plate is greater than the thickness of the side plates.

[0015] The rear end of the skylight installation reinforcement plate is provided with a groove structure, and structural adhesive is filled in the groove structure to connect with the corresponding area of the outer roof panel; a reinforcing plate flanging is arranged in a circle on the inner edge of the skylight installation reinforcement plate, and the reinforcing plate flanging is connected to the skylight flanging of the outer roof panel through structural adhesive.

[0016] The rear crossbeam structure includes a rear top crossbeam outer plate and a rear top crossbeam inner plate which are welded together. The rear top crossbeam outer plate is provided with a glue application groove, the end of the rear top crossbeam outer plate is provided with a welding surface for welding with the side wall, and the rear top crossbeam inner plate is welded to the concave water trough structure of the outer roof panel.

[0017] The glue application grooves on the rear top crossbeam outer plate are arranged in a group side by side horizontally, and rear top crossbeam positioning and installation holes are arranged on the rear top crossbeam outer plate.

[0018] The inner sides of the front connecting bracket, the middle connecting bracket, and the rear connecting bracket are all provided with connecting holes, and the outer sides of the front connecting bracket, the middle connecting bracket, and the rear connecting bracket are all provided with connecting welding surfaces that are welded to the corresponding side panels.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The closed cross-section structure of the front beam structure at the front of the roof can greatly improve its top pressure resistance, and the force transmission structure of the front connecting bracket can distribute and transmit the force to the left and right side assemblies and the entire body frame assembly to further improve the pressure resistance.

[0021] 2. The cavity structure formed by the sunroof mounting reinforcement plate and the outer panel of the roof in the middle section, as well as the sunroof mounting reinforcement plate through the laser welding structure with unequal material thickness, achieves the directional reinforcement of the force transmission structure, which greatly improves its top pressure resistance. Furthermore, the force transmission structure of the middle connecting bracket and the rear connecting bracket disperses and transmits the force to the left and right side assemblies and the entire body frame assembly, further improving the pressure resistance.

[0022] 3. The rear of the roof, through the cavity structure formed by the rear crossbeam structure and the outer roof panel, can effectively improve the compressive strength, and through its force transmission structure, the force value is distributed and transmitted to the left and right side assemblies and the entire body frame assembly to further improve the compressive strength.

[0023] 4. The flanged structure of the outer panel of the roof and the flanged structure of the sunroof mounting reinforcement plate are connected by structural adhesive to form a relatively strong flanged reinforcement structure, which can effectively improve the installation rigidity and modal characteristics of the sunroof and improve the overall NVH performance of the sunroof.

[0024] 5. By forming an integrated and reinforced assembly structure through various components, the compressive strength, torsional stiffness, bending stiffness, and modal strength of the vehicle frame assembly are improved, thereby enhancing the overall performance of the vehicle and the ride comfort. In the event of an accidental rollover, it can effectively reduce the deformation of the passenger compartment and protect passenger safety. Attached Figure Description

[0025] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0026] Figure 1 This is a schematic diagram of the automotive roof structure of the present invention.

[0027] Figure 2 This is a reverse view of the automotive roof structure of the present invention.

[0028] Figure 3 This is a schematic diagram of the outer structure of the top cover of the present invention.

[0029] Figure 4 This is a schematic diagram of the front crossbeam structure of the present invention.

[0030] Figure 5 This is a schematic diagram of the reinforcing plate for installing the sunroof in this invention.

[0031] Figure 6 This is a schematic diagram of the rear crossbeam structure of the present invention.

[0032] Figure 7 This is a schematic diagram of the front connecting bracket of the present invention.

[0033] Figure 8 This is a schematic diagram of the connecting bracket in the present invention.

[0034] Figure 9 This is a schematic diagram of the rear connection bracket of the present invention.

[0035] Figure 10 This is a cross-sectional view (AA) of the automobile roof structure of the present invention.

[0036] Figure 11 This is a cross-sectional view of the automotive roof structure BB of the present invention.

[0037] Figure 12 This is a CC cross-sectional view of the automobile roof structure of the present invention.

[0038] Figure 13 This is a cross-sectional view of the automotive roof structure of the present invention.

[0039] In the picture:

[0040] 10. Top cover outer panel; 20. Front crossbeam structure; 30. Sunroof mounting reinforcement plate; 40. Rear crossbeam structure; 50. Front connecting bracket; 60. Middle connecting bracket; 70. Rear connecting bracket;

[0041] 11. Front positioning and mounting holes; 12. Luggage rack mounting holes; 13. Rear door or rear cover mounting holes; 14. Reinforcing ribs; 15. Rear door or rear cover wiring harness through holes; 16. Concave drainage channel structure; 17. Sunroof hole; 18. Sunroof inner flange; 19. Flanged flange face.

[0042] 21. Process positioning hole; 22. Mounting bracket; 23. Front crossbeam hole I; 24. Front crossbeam hole II; 25. Front flange face; 26. Rear flange face; 27. Front crossbeam groove; 28. Front crossbeam hole III; 29. ​​Top surface of front crossbeam.

[0043] 31. Side plate I; 32. Rear end plate; 33. Side plate II; 34. Front end plate; 35. Groove cross-section structure; 36. Reinforcing plate flange; 37. Welded nut; 38. Welded bolt;

[0044] 41. Outer plate of rear top crossbeam; 42. Inner plate of rear top crossbeam; 43. Adhesive groove; 44. Weight reduction hole; 45. Flanged edge of rear top crossbeam; 46. Hinge mounting hole; 47. Welding surface; 48. Positioning and mounting hole of rear top crossbeam;

[0045] 51. Front connecting bracket mounting hole; 52. Front connecting bracket positioning hole; 53. Front connecting bracket process hole; 54. Front connecting bracket welding surface; 55. Side panel connecting welding surface;

[0046] 61. Mounting hole for the middle connecting bracket; 62. Positioning hole for the middle connecting bracket; 63. Reinforcing rib for the middle connecting bracket; 64. Process hole for the middle connecting bracket; 65. Flanged edge for the middle connecting bracket;

[0047] 71. Rear connecting bracket mounting hole; 72. Rear connecting bracket reinforcing rib; 73. Rear connecting bracket positioning hole; 74. Rear connecting bracket flange welding surface. Detailed Implementation

[0048] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and through the description of the examples.

[0049] like Figures 1 to 13 As shown, the automotive roof assembly includes an outer roof panel, a sunroof mounting reinforcement plate, a front crossbeam structure, a rear crossbeam structure, and front, middle, and rear connecting brackets for connecting to the corresponding side panels. These structures form an integrated reinforced assembly, enhancing the compressive strength, torsional stiffness, bending stiffness, and modal characteristics of the vehicle's frame assembly, thereby improving the overall performance and ride comfort of the vehicle. In the event of a rollover, it effectively reduces deformation of the passenger compartment, protecting passenger safety.

[0050] The sunroof mounting reinforcement plate, the front crossbeam structure, and the rear crossbeam structure are all located on the back of the outer panel of the roof. The outer panel of the roof has a sunroof hole, and the sunroof mounting reinforcement plate is set corresponding to the sunroof hole on the outer panel of the roof. The front connecting bracket is welded to the end of the front crossbeam structure, and the front crossbeam structure forms a closed crossbeam structure. The middle connecting bracket is connected to the side plate of the sunroof mounting reinforcement plate, and the rear connecting bracket is connected to the rear end of the sunroof mounting reinforcement plate.

[0051] The front end of the outer panel of the top cover has a flanged face with front positioning and mounting holes 11. The rear end of the outer panel of the top cover has a concave water channel structure with longitudinal reinforcing ribs inside. The concave water channel structure allows rainwater to be collected from the top cover into the concave interior of the water channel and flow down from both sides, improving the corrosion resistance of the top cover; at the same time, the concave structure can also enhance the lateral stiffness and strength of the top cover structure.

[0052] The front end of the front crossbeam structure is provided with a front flange face, which is welded to the flange face of the outer plate of the top cover. The rear end of the front crossbeam structure is provided with a front crossbeam groove, which is filled with structural adhesive and connected to the outer plate of the top cover, thus realizing a transverse cavity structure that greatly improves the transverse stiffness and strength of the top cover structure.

[0053] The longitudinal section of the front crossbeam structure is shaped like a "Z". The inner side of the front connecting bracket is welded to the front crossbeam structure, and the outer side of the front connecting bracket is provided with a side panel connecting welding surface, which is welded to the corresponding side panel area. The front part of the roof can effectively improve its top pressure resistance through the closed section structure of the front crossbeam structure, and the force value is distributed and transmitted to the left and right side panel assemblies and the entire body frame assembly through the force transmission structure of the front connecting bracket to further improve the pressure resistance.

[0054] The sunroof mounting reinforcement plate includes a pair of side plates, a front plate located between the front ends of the pair of side plates, and a rear plate located between the rear ends of the pair of side plates. The pair of side plates are symmetrically arranged side plate I 31 and side plate II 33. After the pair of side plates, the front plate, and the rear plate are welded together, they are integrally stamped and formed, which improves the structural strength.

[0055] The rear end of the sunroof mounting reinforcement plate has a groove structure, which is filled with structural adhesive and connected to the corresponding area of ​​the outer panel of the roof. The inner edge of the sunroof mounting reinforcement plate has a reinforcement plate flange, which is connected to the sunroof flange of the outer panel of the roof by structural adhesive.

[0056] The front and rear panels are thicker than the side panels. By welding materials of unequal thickness, the load-bearing parts of the front and rear panels can be strengthened to increase the compressive strength of the passenger car roof. Furthermore, the left and right side panels can be connected and strengthened through connecting brackets, thereby improving the rigidity and modal characteristics of the vehicle body frame. Meanwhile, the material thickness of the side panels, which are not critical load-bearing parts, can be appropriately reduced to achieve overall vehicle weight reduction.

[0057] The central part of the roof is reinforced by a cavity structure formed by the sunroof mounting reinforcement plate and the outer roof panel. The sunroof mounting reinforcement plate is reinforced by laser welding with unequal material thickness to achieve directional reinforcement of the force transmission structure, which greatly improves its top pressure resistance. Furthermore, the force transmission structure of the middle connecting bracket and the rear connecting bracket disperses and transmits the force to the left and right side assemblies and the entire body frame assembly to further improve the pressure resistance.

[0058] The flanged structure of the outer panel of the roof and the flanged structure of the sunroof mounting reinforcement plate are connected by structural adhesive to form a relatively strong flanged reinforcement structure, which can effectively improve the installation rigidity and modal characteristics of the sunroof and enhance the overall NVH performance of the sunroof.

[0059] The rear crossbeam structure includes a welded outer plate and an inner plate of the rear top crossbeam. The outer plate of the rear top crossbeam is provided with an adhesive groove, and the end of the outer plate of the rear top crossbeam is provided with a welding surface that is welded to the side wall. The inner plate of the rear top crossbeam is welded to the concave water channel structure of the outer plate of the top cover.

[0060] The adhesive grooves on the outer panel of the rear roof crossbeam are arranged in a horizontal row, and the outer panel of the rear roof crossbeam has positioning and mounting holes for the rear roof crossbeam. The rear part of the roof, through the cavity structure formed by the rear crossbeam structure and the outer panel of the roof, can effectively improve the compressive strength, and through its force transmission structure, the force is distributed and transmitted to the left and right side assemblies and the entire body frame assembly to further improve the compressive strength.

[0061] The front connecting bracket, the middle connecting bracket, and the rear connecting bracket all have connecting holes on their inner sides, and the outer sides of the front connecting bracket, the middle connecting bracket, and the rear connecting bracket all have connecting welding surfaces that are welded to the corresponding side panels.

[0062] The present invention provides an automotive roof structure that addresses the NVH (noise, vibration, and harshness) problems of existing roof assemblies through a reasonable cross-section and material structure design. Furthermore, the present invention's automotive roof structure can meet the installation requirements of large sunroofs and standard requirements, and can also serve as a universal structural reinforcement solution to improve the roof strength of different vehicle models.

[0063] A preferred embodiment of the present invention is as follows:

[0064] The present invention relates to an automotive roof structure, comprising a roof outer panel 10, a front crossbeam structure 20, a sunroof mounting reinforcement plate 30, a rear crossbeam structure 40, a front connecting bracket 50, a middle connecting bracket 60, and a rear connecting bracket 70, as shown below. Figure 1 Car roof structure diagram and Figure 2 The reverse side view of the car roof structure is shown.

[0065] The outer panel 10 of the top cover is formed by stamping thin metal sheet, such as... Figure 3 The top cover outer panel is shown. The front end features process positioning and mounting holes 11 and a flanged face 19; the side features luggage rack mounting holes 12; and the rear features a concave water channel structure 16. See details for the structural specifications. Figure 13 Cross-sectional view of the car roof structure DD. The rear hatch or tailgate mounting holes 13, reinforcing ribs 14, and tailgate or tailgate wiring harness through holes 15 are designed inside the rear flow structure. A rectangular sunroof opening 17 with rounded corners is designed in the center of the outer roof panel 10. An inwardly flared edge 18 for the sunroof is designed at the edge of the rectangular sunroof opening. See details for the structural details. Figure 10Cross-sectional view of the car roof structure AA. The concave drainage channel structure 16 collects rainwater from the roof into the concave interior of the channel, allowing it to flow down from both sides, thus improving the roof's corrosion resistance. Its concave structure also enhances the lateral stiffness and strength of the roof structure. The rectangular hole with rounded corners in the center of the roof allows for sunroof installation. The flanged structure of this rectangular hole with rounded corners further strengthens the roof structure's strength and rigidity.

[0066] The front crossbeam structure 20 is formed by stamping thin metal sheet as shown in the figure. Figure 4 The front crossbeam structure is shown in the figure below, and its cross-sectional structure is as follows: Figure 10 The cross-sectional view of the car roof structure AA shows a Z-shaped structure. The front crossbeam structure 20 is connected to the front flange face 19 of the roof outer panel 10 via the front flange face 25, preferably by welding. The rear flange face 26 of the front crossbeam structure 20 is designed with a front crossbeam groove 27. Structural adhesive is filled in the groove to connect the front crossbeam structure to the roof outer panel, and to form a cavity structure that greatly improves the lateral stiffness and strength of the roof structure.

[0067] Furthermore, process positioning holes 21 are designed at both ends of the front crossbeam structure 20, and mounting brackets 22 are welded to their upper surfaces to realize the installation of the roof and sun visor. Furthermore, front crossbeam holes I 23 and II 24 are designed on the front and rear sides of the front crossbeam structure 20 according to installation requirements, and front crossbeam holes III 28 are designed on the top surface 29 of the front crossbeam to realize the installation functions of various automotive parts.

[0068] The sunroof mounting reinforcement plate 30 is made of stamped metal sheet, as shown in the image. Figure 5 The sunroof reinforcement plate is shown. First, four thin metal plates—side plate I 31, side plate II 33, front plate 34, and rear plate 32—are laser-welded together at their dividing lines, then stamped into a single piece using a mold. Side plates I 31, II 33, front plate 34, and rear plate 32 are designed with different materials and thicknesses. Preferably, front plate 34 and rear plate 32 are made of 1.5mm high-strength material, and the two side plates are preferably made of 1.2mm material. This unequal thickness and material welding strengthens the load-bearing areas of front plate 34 and rear plate 32, increasing the roof's compressive strength. Furthermore, the end plates reinforce the connection between the left and right side assemblies, improving the rigidity and modal characteristics of the vehicle frame. The side plates in less critical load-bearing areas have a slightly reduced material thickness to reduce overall vehicle weight.

[0069] Furthermore, a grooved cross-section structure 35 is designed on the sunroof mounting reinforcement plate 30, preferably at 17 locations. Structural adhesive is filled into the grooved cross-section structure 35 to connect the sunroof mounting reinforcement plate 30 to the outer roof panel 10. A reinforcement plate flange 36 is designed around the inner edge of the sunroof mounting reinforcement plate 30 and is connected to the inner sunroof flange 18 of the outer roof panel 10 by structural adhesive, forming a cavity structure, which further enhances the strength and rigidity of the roof structure.

[0070] Furthermore, welding nuts 37 are designed on the sunroof mounting reinforcement plate 30 to facilitate the installation of the sunroof and other accessories, such as... Figure 12 The CC cross-sectional view of the car roof structure is shown. Further, welding bolts 38 are designed on the sunroof mounting reinforcement plate 30 to connect the sunroof mounting reinforcement plate 30 with the middle connecting bracket 60 and the rear connecting bracket 70, forming a cavity structure, as shown. Figure 11 The BB cross-sectional diagram of the car roof structure further realizes the connection and reinforcement with the left and right side assemblies.

[0071] The rear crossbeam structure 40 is formed by welding the outer plate 41 of the rear top crossbeam and the inner plate 42 of the rear top crossbeam together, such as... Figure 6 The rear crossbeam structure is shown in the diagram. The outer plate 41 of the rear top crossbeam has adhesive-applying grooves 43, preferably 10. The outer plate 41 also has positioning and mounting holes 48 and hinge mounting holes 46 for welding positioning and installation of other automotive accessories. The outer plate 41 also has welding surfaces 47 for connection to the left / right side assemblies.

[0072] Furthermore, the outer plate 41 of the rear top crossbeam is designed with weight-reduction holes 44 to achieve the effect of reducing the weight of the whole vehicle. The rear edge of the inner plate 42 of the rear top crossbeam is designed with a rear top crossbeam flange 45.

[0073] The cavity structure of the rear crossbeam structure 40 is as follows Figure 13 As shown in the cross-sectional diagram of the car roof structure DD, the front end of the rear crossbeam structure 40 is connected to the outer roof panel 10 via structural adhesive through the adhesive groove 43, and the rear end is welded to the drainage channel structure 16 of the outer roof panel 10 via the rear roof crossbeam flange 45. The cavity structure formed by the rear crossbeam structure 40 and the outer roof panel 10 greatly improves the structural rigidity and strength of the rear end of the roof, and can effectively improve the compressive strength of the passenger car roof.

[0074] The front connecting bracket 50 is formed by stamping thin metal sheet, with a symmetrical design on both sides. Figure 7The front connecting bracket is shown in the schematic diagram. The front connecting bracket 50 is designed with mounting holes 51 for mounting wiring harnesses and other accessories. The front connecting bracket 50 is designed with positioning holes 52 for process positioning. The front connecting bracket 50 is designed with process holes 53. Furthermore, the front connecting bracket 50 is designed with a welding surface 54 to connect to the front crossbeam structure 20. Furthermore, the front connecting bracket 50 is designed with a side panel welding surface 55 to connect to the left and right side panel assemblies, thereby achieving the connection between the front crossbeam structure and the force transmission structure of the left and right side panel assemblies, greatly improving the overall connection performance of the vehicle body frame.

[0075] The middle connecting bracket 60 is formed by stamping thin metal sheet, with a symmetrical design on both sides. Figure 8 The schematic diagram of the central connecting bracket is shown. The central connecting bracket 60 is designed with mounting holes 61 to connect with the sunroof mounting reinforcement plate 30. The central connecting bracket 60 is designed with positioning holes 62 for process positioning. The central connecting bracket 60 is designed with reinforcing ribs 63 to improve its overall strength and rigidity. The central connecting bracket 60 is designed with process holes 64 to facilitate process implementation. The central connecting bracket 60 is designed with flanges 65 to connect with the left and right side assemblies, further connecting the sunroof mounting reinforcement plate with the left and right side assemblies, improving the connection of the force transmission structure and greatly enhancing the overall connection performance of the vehicle body frame.

[0076] The rear connecting bracket 70 is formed by stamping thin metal sheet, with a symmetrical design on both sides. Figure 9 The schematic diagram of the rear connecting bracket is shown. The rear connecting bracket 70 is designed with mounting holes 71 to connect with the sunroof mounting reinforcement plate. The rear connecting bracket is designed with reinforcing ribs 72 to improve its overall strength and rigidity. The rear connecting bracket 70 is designed with positioning holes 73 for installation and process positioning. The rear connecting bracket is designed with flanged welding surfaces 74 to connect with the left and right side assemblies, further connecting the sunroof mounting reinforcement plate with the left and right side assemblies, improving the connection of the force transmission structure and greatly enhancing the overall connection performance of the vehicle body frame.

[0077] The above description is merely an illustration of preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0078] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A car roof assembly, comprising a roof outer panel, a sunroof mounting reinforcement plate, a front crossbeam structure, and a rear crossbeam structure, wherein the sunroof mounting reinforcement plate, the front crossbeam structure, and the rear crossbeam structure are all disposed on the back side of the roof outer panel, and the sunroof mounting reinforcement plate is configured corresponding to a sunroof hole opened on the roof outer panel; characterized in that: It further includes a front connection bracket, a middle connection bracket and a rear connection bracket for connecting with the corresponding side wall; the front connection bracket is welded to the end of the front crossbeam structure, and the front crossbeam structure forms a closed crossbeam structure; the middle connection bracket is connected to the side plate of the skylight installation reinforcement plate, and the rear connection bracket is correspondingly connected to the rear end of the skylight installation reinforcement plate; The front end of the outer roof panel is provided with a flanging flange surface, the rear end of the outer roof panel is provided with a concave water channel structure, and reinforcing ribs are longitudinally arranged in the concave water channel structure; the front end of the front crossbeam structure is provided with a front end flange surface, the front end flange surface is connected to the outer roof panel, the rear end of the front crossbeam structure is provided with a front crossbeam groove, and structural adhesive is filled in the front crossbeam groove to connect with the outer roof panel; the rear crossbeam structure includes a rear top crossbeam outer plate and a rear top crossbeam inner plate which are welded together, a glue application groove is arranged on the rear top crossbeam outer plate, a welding surface for welding with the side wall is arranged at the end of the rear top crossbeam outer plate, and the rear top crossbeam inner plate is welded to the concave water channel structure of the outer roof panel.

2. The automobile roof assembly as described in claim 1, characterized in that: The longitudinal section of the front crossbeam structure is in a shape of a capital "J".

3. The automobile roof assembly as described in claim 1, characterized in that: The skylight installation reinforcement plate includes a pair of side plates, a front end plate arranged between the front ends of the pair of side plates, and a rear end plate arranged between the rear ends of the pair of side plates. After the pair of side plates, the front end plate and the rear end plate are welded together, they are integrally stamped and formed.

4. The automobile roof assembly as described in claim 3, characterized in that: The thickness of the front end plate and the rear end plate is greater than that of the side plates.

5. The automotive roof assembly as described in claim 3, characterized in that: A groove structure is arranged at the rear end of the skylight installation reinforcement plate, and structural adhesive is filled in the groove structure to connect with the corresponding area of the outer roof panel; a reinforcing plate flanging is arranged around the inner edge of the skylight installation reinforcement plate, and the reinforcing plate flanging is connected to the skylight flanging of the outer roof panel through structural adhesive.

6. The automobile roof assembly as described in claim 1, characterized in that: The glue application grooves on the rear top crossbeam outer plate are arranged in a group side by side horizontally, and rear top crossbeam positioning and installation holes are arranged on the rear top crossbeam outer plate.

7. The automobile roof assembly as described in any one of claims 1 to 6, characterized in that: Connection holes are arranged on the inner sides of the front connection bracket, the middle connection bracket and the rear connection bracket, and connection welding surfaces for welding with the corresponding side wall are arranged on the outer sides of the front connection bracket, the middle connection bracket and the rear connection bracket.

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