Integral cargo compartment floor framework assembly and vehicle

Abstract

The invention provides an integral type cargo compartment floor framework assembly and a vehicle, and belongs to the technical field of automobiles, the integral type cargo compartment floor framework assembly comprises a first cross beam assembly and a cargo compartment framework assembly which are connected with each other, a passenger compartment is installed on the upper surface of the first cross beam assembly, and the first cross beam assembly comprises a first cross beam; a first connecting beam and a second connecting beam are arranged on the side, close to the cargo compartment framework assembly, of the first cross beam. The cargo compartment framework assembly comprises transverse plates and vertical plates, the two vertical plates are arranged in parallel, and the transverse plates are connected between the two vertical plates. The first connecting beam is connected with one end of the vertical plate, and the second connecting beam is connected with the transverse plate close to the first cross beam assembly. Through the first cross beam assembly and the cargo compartment framework assembly which are connected with each other, the passenger compartment is installed on the upper surface of the first cross beam assembly, the passenger compartment and the cargo compartment floor are combined into a correlative whole, the overall rigidity of a vehicle body is improved, and the bearing strength and the fatigue resistance strength of the cargo compartment are enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobiles, and particularly relates to an integral cargo compartment floor skeleton assembly and a vehicle. Background Art

[0002] The traditional cargo compartment floor assembly usually adopts a split - type structural design. The passenger compartment and the cargo compartment are two independent modules, respectively bolt - mounted on the vehicle frame. The cargo compartment floor skeleton assembly is usually formed by welding 4 - 5 cross - beams of different lengths with the floor panel. U - shaped structures are formed on both sides of the beams through adapter brackets and the cargo box side walls. These cross - beams, as the main load - bearing structures for carrying the load of items in the cargo compartment, need to have high strength. At the same time, the main connection points between the cargo compartment and the vehicle frame are also on these cross - beams, and the cross - beams also need to bear high fatigue loads. Since there is no direct connection between the cargo compartment and the passenger compartment, the overall structural stiffness is weak.

[0003] Therefore, it is necessary to design a cargo box floor frame that can combine the passenger compartment and the cargo box floor into an interrelated integral cargo compartment floor skeleton assembly. Summary of the Invention

[0004] In view of the above problems, the present invention provides an integral cargo compartment floor skeleton assembly, which includes a first cross - beam assembly and a cargo compartment skeleton assembly connected to each other. The passenger compartment is installed on the upper surface of the first cross - beam assembly. The first cross - beam assembly includes a first cross - beam, and a first connecting beam and a second connecting beam are arranged on one side of the first cross - beam close to the cargo compartment skeleton assembly.

[0005] The cargo compartment skeleton assembly includes a transverse plate and a vertical plate. The two vertical plates are placed in parallel, and a plurality of transverse plates are connected between the two vertical plates. The first connecting beam is connected to one end of the vertical plate, and the second connecting beam is connected to the transverse plate close to the first cross - beam assembly.

[0006] Further, the connection method between the transverse plate and the vertical plate is laser welding.

[0007] Further, the transverse plate and the vertical plate respectively adopt an integral hot - forming structural framework.

[0008] Further, an installation assembly is arranged on one side of the vertical plate away from the transverse plate, and the installation assembly is connected to the cargo compartment.

[0009] Further, the installation assembly includes a second mounting plate, which is made by integral hot - forming. A connecting bracket is connected to the second mounting plate, and the second mounting plate is connected to the cargo compartment.

[0010] Further, a suspension mounting plate and a first bracket are arranged on one side of the vertical plate away from the transverse plate, and the suspension mounting plate is located on the side of the first bracket away from the installation assembly.

[0011] Further, the cargo compartment floor skeleton assembly further includes a cargo compartment cross beam, and the cargo compartment cross beam is installed at one end of the vertical plate away from the first cross beam assembly.

[0012] Further, the cargo compartment cross beam includes a cargo compartment cross beam support plate and a second connecting plate. The cargo compartment cross beam support plate is fixedly connected to the vertical plate, and second connecting plates are respectively arranged on both sides of the cargo compartment cross beam support plate.

[0013] Further, first connecting plates are respectively fixedly connected to both ends of the first cross beam, and a first reinforcing plate is arranged on the first cross beam.

[0014] A vehicle includes a cargo compartment, a passenger compartment, and the above-mentioned integral cargo compartment floor skeleton assembly. The passenger compartment is connected to the first cross beam assembly of the integral cargo compartment floor skeleton assembly, and a cargo compartment is installed on the cargo compartment skeleton assembly of the integral cargo compartment floor skeleton assembly.

[0015] Advantages of the present invention:

[0016] 1. In the present invention, through the mutually connected first cross beam assembly and the cargo compartment skeleton assembly, the passenger compartment is installed on the upper surface of the first cross beam assembly. The cargo compartment skeleton assembly includes a horizontal plate and a vertical plate. The two vertical plates are placed in parallel, and a plurality of horizontal plates are connected between the two vertical plates; the first connecting beam is connected to one end of the vertical plate, and the second connecting beam is connected to the horizontal plate close to the first cross beam assembly. The passenger compartment and the cargo box floor are combined into an interrelated whole, improving the overall stiffness of the vehicle body and enhancing the load-bearing and anti-fatigue strength of the cargo compartment.

[0017] 2. In the present invention, the horizontal plate and the vertical plate respectively adopt an integral hot forming structural framework. The integral hot forming cargo compartment skeleton design is used, reducing the number of parts, reducing the fixed investment in molds and fixtures, increasing the material utilization rate of parts to 79.2% and achieving a weight reduction of 10%.

[0018] 3. In the present invention, first connecting plates are respectively fixedly connected to both ends of the first cross beam, and a first reinforcing plate is arranged on the first cross beam. The first reinforcing plate is used for installing the rear row seats of the vehicle and supporting the side wall of the cargo compartment, thereby connecting the passenger compartment and the cargo box together, improving the overall stiffness of the vehicle body and enhancing the load-bearing and anti-fatigue strength of the cargo compartment.

[0019] Other features and advantages of the present invention will be described in the subsequent description, and, in part, will be obvious from the description or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the description and the drawings. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0021] Figure 1 Shows the overall structural schematic diagram of the integral cargo compartment floor skeleton assembly in the embodiment of the present invention.

[0022] Figure 2 Shows the structural schematic diagram of the first crossbeam assembly of the integral cargo compartment floor skeleton assembly in the embodiment of the present invention.

[0023] Figure 3 Shows the structural schematic diagram of the cargo compartment skeleton assembly of the integral cargo compartment floor skeleton assembly in the embodiment of the present invention.

[0024] Figure 4 Shows the structural schematic diagram of the suspension mounting plate of the integral cargo compartment floor skeleton assembly in the embodiment of the present invention.

[0025] Figure 5 Shows the structural schematic diagram of the first bracket of the integral cargo compartment floor skeleton assembly in the embodiment of the present invention.

[0026] Figure 6 Shows the structural schematic diagram of the installation assembly of the integral cargo compartment floor skeleton assembly in the embodiment of the present invention.

[0027] Figure 7 Shows the structural schematic diagram of the cargo compartment crossbeam of the integral cargo compartment floor skeleton assembly in the embodiment of the present invention.

[0028] Figure 8 Shows the structural schematic diagram of the cargo compartment crossbeam support plate of the integral cargo compartment floor skeleton assembly in the embodiment of the present invention.

[0029] Figure 9 Shows the position schematic diagram of the laser welding of the transverse plate and the vertical plate of the integral cargo compartment floor skeleton assembly in the embodiment of the present invention.

[0030] Figure 10 Shows the partial schematic diagram of the connection between the installation assembly and the cargo compartment of the integral cargo compartment floor skeleton assembly in the embodiment of the present invention.

[0031] Figure 11 Shows the partial schematic diagram of the connection between the cargo compartment crossbeam support plate and the rear floor skeleton of the integral cargo compartment floor skeleton assembly in the embodiment of the present invention.

[0032] In the figure, 10 is the first crossbeam assembly; 11 is the first crossbeam; 12 is the first reinforcing plate; 13 is the first connecting plate; 14 is the first connecting beam; 15 is the second connecting beam;

[0033] 20 is the cargo box skeleton assembly; 21 is the horizontal plate; 22 is the vertical plate; 23 is the suspension mounting plate; 231 is the first mounting plate; 232 is the first mounting sleeve; 233 is the second reinforcing plate; 24 is the first bracket; 241 is the bracket connecting plate; 242 is the third reinforcing plate; 243 is the second mounting sleeve; 244 is the hanging bracket; 25 is the mounting assembly; 251 is the second mounting plate; 252 is the third mounting sleeve; 253 is the connecting bracket; 254 is the positioning pin hole; 255 is the fourth reinforcing plate; 26 is the spare tire bracket; 27 is the pull ring bracket;

[0034] 30 is the cargo box crossbeam; 31 is the cargo box crossbeam support plate; 311 is the support crossbeam; 312 is the tailgate support plate; 32 is the second connecting plate;

[0035] 40 is the cargo box; 50 is the rear floor skeleton. Specific embodiments

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Regarding improving the overall stiffness of the vehicle body while meeting the requirements of process manufacturing, it is a problem that needs to be solved in the structural design process. The present invention uses new technologies and new processes to increase the structural strength of parts, enhance the load-bearing capacity of the cargo box, and improve the fatigue strength of the cargo box, which is an essential link in the design and development.

[0038] Embodiment 1

[0039] Figure 1 Shows a schematic diagram of the overall structure of the integral cargo box floor skeleton assembly in the embodiment of the present invention. An integral cargo box floor skeleton assembly includes a first crossbeam assembly 10 and a cargo box skeleton assembly 20 that are connected to each other. The upper surface of the first crossbeam assembly 10 is installed with a passenger compartment. The first crossbeam assembly 10 includes a first crossbeam 11. A first connecting beam 14 and a second connecting beam 15 are arranged on one side of the first crossbeam 11 close to the cargo box skeleton assembly 20; the second connecting beam 15 is located between the two first connecting beams 14. The two first connecting beams 14 are respectively connected to one ends of the two vertical plates 22, and the second connecting beam 15 is connected to the horizontal plate 21;

[0040] The cargo box frame assembly 20 includes a transverse plate 21 and a vertical plate 22. The two vertical plates 22 are placed in parallel, and a plurality of transverse plates 21 are connected between the two vertical plates 22; the first connecting beam 14 is connected to one end of the vertical plate 22, and the second connecting beam 15 is connected to the transverse plate 21 close to the first crossbeam assembly 10.

[0041] Specifically, it includes two or three transverse plates 21 and two vertical plates 22. Figure 1 , through the arrangement of the first crossbeam assembly 10 and the cargo box crossbeam 30, a design scheme of a five-transverse and two-longitudinal cargo box floor frame assembly is formed. The passenger compartment (fixed on the first crossbeam assembly 10) and the cargo box floor are combined into an interrelated whole, improving the overall stiffness of the vehicle body and enhancing the load-bearing and anti-fatigue strength of the cargo box. Using an integrated hot stamping cargo box frame design reduces the number of parts, lowers the fixed investment in molds and jigs, and increases the material utilization rate of parts to 79.2% and achieves a weight reduction of 10%.

[0042] Reference Figure 9 , the connection method between the transverse plate 21 and the vertical plate 22 is laser welding, Figure 9 Laser welding is used at the position indicated by A in

[0043] Furthermore, the transverse plate 21 and the vertical plate 22 respectively adopt an integrated hot stamping structural framework. Specifically, the cargo box frame assembly 20, as the main load-bearing structure of the cargo box, adopts an integrated hot stamping structural framework design. Among them, the transverse plate 21 and the vertical plate 22 adopt the laser welding process, the material utilization rate is increased to 79.2%, the overall weight is reduced by about 10%, the cost is reduced by 6.2 yuan per vehicle, the fixed investment is reduced by 1.07 million yuan, and the number of single parts is reduced by 6.

[0044] The tensile strength of the hot stamping material is 1350 - 1700 Mpa, and the yield strength is 950 - 1250 Mpa, greatly improving the load-bearing capacity of the cargo box. Reference Figure 3 , the spare tire bracket 26 and the pull ring bracket 27 are connected to the installation points of the transverse plate 21 and the vertical plate 22, and are connected to the frame using the spot welding process, optimizing the strength of the installation points.

[0045] The integrated hot stamping frame (as shown in Figure 9 ) reduces the investment in molds and welding tooling, reduces the requirements for site, design changes, and personnel, and improves the overall dimensional accuracy of the frame, meeting the design requirements of fewer parts, fewer processes, and high precision. It is an innovation and application of the advanced integrated hot stamping process in the design of the cargo box floor frame.

[0046] Reference Figure 3 , on the side of the vertical plate 22 away from the transverse plate 21, an installation assembly 25 is provided, and the installation assembly 25 is connected to the inner panel of the side wall of the cargo box 40.

[0047] In the above embodiments, alternatively, another implementation is that the mounting assembly 25 includes a second mounting plate 251. The second mounting plate 251 is integrally thermoformed. A connecting bracket 253 is connected to the second mounting plate 251. The second mounting plate 251 is connected to the left connecting plate of the inner and outer panels of the cargo box 40. The head of the connecting bracket 253 is a pre-buckle, which forms a support for the side position of the cargo box 40 before the general assembly welding, as Figure 10 shown, that is Figure 10 the direction of the arrow in is the support direction.

[0048] As Figure 6 shown, Figure 6 shows the mounting assembly 25. There are at least two mounting assemblies 25. The two mounting assemblies 25 are respectively installed on the side of the vertical plate 22 away from the horizontal plate 21. The mounting assembly 25 is connected to the inner panel of the side wall of the cargo box 40, strengthening the structural strength of the side wall of the cargo box 40 and improving the overall fatigue resistance of the vehicle body.

[0049] The mounting assembly 25 includes a second mounting plate 251. The second mounting plate 251 is integrally thermoformed into a "U" - shaped structure, which extends on both sides of the "U" - shaped structure. A third mounting sleeve 252 and a positioning pin hole 254 are provided in the middle of the "U" - shaped structure. The third mounting sleeve 252 is used for positioning when the mounting assembly 25 is spot - welded to the vertical plate 22. The third mounting sleeve 252 is used to provide a bolt mounting point for mounting with the vehicle frame; The second mounting plate 251 is used to support the side wall of the cargo box 40. A fourth reinforcing plate 255 is provided below the second mounting plate 251, and the fourth reinforcing plate 255 plays a supporting role. The mounting assembly 25 provides a mounting point for the vehicle frame and a matching hole for the vehicle frame positioning pin.

[0050] Furthermore, a suspension mounting plate 23 and a first bracket 24 are provided on the side of the vertical plate 22 away from the horizontal plate 21. The suspension mounting plate 23 is located on the side of the first bracket 24 away from the mounting assembly 25.

[0051] Specifically, referring to Figure 4 , the suspension mounting plate 23 includes a first mounting plate 231. The first mounting plate 231 is integrally thermoformed from a single plate. A second reinforcing plate 233 is provided on its outer side. The shape of the second reinforcing plate 233 is similar to that of the first mounting plate 231, both being "U" - shaped. A gap is provided between the bottom surface of the first mounting plate 231 and the bottom surface of the second reinforcing plate 233, thereby making the structure of the suspension mounting plate 23 stronger; A first mounting sleeve 232 is provided inside the second reinforcing plate 233. The first mounting sleeve 232 passes through the first mounting plate 231 and is bolt - connected to the first connecting bracket of the vehicle frame cargo box;

[0052] Specifically, referring to Figure 5, the first bracket 24 is integrally thermoformed by a bracket connecting plate 241, and a third reinforcing plate 242 is provided on its inner side. There is a gap between the third reinforcing plate 242 and the bracket connecting plate 241, thereby making the structure of the first bracket 24 stronger; the side of the bracket connecting plate 241 away from the second mounting sleeve 243 is bent into a hanging bracket 244, which is convenient to connect or weld with the vertical plate 22 through the hanging bracket 244;

[0053] A second mounting sleeve 243 is provided on the inner side of the bracket connecting plate 241. The second mounting sleeve 243 passes through the third reinforcing plate 242 and is bolted to the second connecting bracket of the vehicle frame cargo box;

[0054] As Figure 1 shown, the cargo box floor skeleton assembly further includes a cargo box cross beam 30, and the cargo box cross beam 30 is installed at one end of the vertical plate 22 away from the first cross beam assembly 10.

[0055] Refer to Figure 7 , the cargo box floor skeleton assembly further includes a cargo box cross beam 30. The cargo box cross beam 30 includes a cargo box cross beam support plate 31 and a second connecting plate 32. The cargo box cross beam support plate 31 is fixedly connected to the vertical plate 22, and second connecting plates 32 are respectively arranged on both sides of the cargo box cross beam support plate 31.

[0056] Specifically, the cargo box cross beam 30 is designed with an inverted U-shaped structure. The mating surface on the cargo box cross beam 30 is the lapping mating surface of the cargo box floor body and the rear enclosure outer panel, and it needs to meet the requirements of gluing and appearance. Second connecting plates 32 are arranged on both sides. The second connecting plates 32 are welded to the side wall D pillar to serve as the bottom support structure of the D pillar, improve the stiffness of the back door hinge mounting point, and control the Y-direction opening dimension of the D pillar. Welding brackets and sleeves are designed at the lower part of the second connecting plate 32 to serve as the connection and mounting points between the rear part of the vehicle frame and the vehicle body. A number of support cross beams 311 are designed on the cargo box cross beam support plate 31 to ensure the overall stiffness of the cargo box cross beam 30, avoid cracking of the cargo box tail structure and welding points due to fatigue problems, and at the same time, holes are opened on the support cross beams 311 to provide mounting points for wiring harnesses.

[0057] Support cross beams 311 are provided on the cargo box cross beam support plate 31. The support cross beams 311 are used to support the cargo box cross beam 30 and play a role in enhancing the load-bearing capacity of the cargo box cross beam 30; tail plate support plates 312 are provided on the cargo box cross beam support plate 31. The two tail plate support plates 312 are respectively located outside the two support cross beams 311. The tail plate support plates 312 are used to be spot-welded to the rear floor skeleton 50 in the X direction and the Z direction to play a role in enhancing the overall structural stiffness of the skeleton (refer to Figure 11 ).

[0058] In the above embodiments, optionally, another implementation manner is that the first crossbeam assembly 10 includes a first crossbeam 11. First connecting plates 13 are fixedly connected to both ends of the first crossbeam 11 respectively. A first reinforcing plate 12 is arranged on the first crossbeam 11. The first reinforcing plate 12 is used for installing the rear seats of the vehicle and supporting the side walls of the cargo compartment.

[0059] Specifically, referring to Figure 2 , the first crossbeam 11 is the main load-bearing structure at the rear of the passenger compartment. The rear seats and the mounting points of the seat belts are installed on this crossbeam. The two sides of the first crossbeam 11 are welded to the sill beam, and the bottom is connected to the vehicle frame by M14 bolts. Three connecting plates (two first connecting beams 14 and one second connecting beam 15) extend from the rear of the main beam and are welded to the bottom frame of the cargo box. Here, the sill beam - rear floor crossbeam - cargo box frame sub-assembly - vehicle frame are connected into an integral stress-bearing structure; First connecting plates 13 are fixedly connected to both ends of the first crossbeam 11 respectively. The first connecting plates 13 use high-strength steel of HC420 / 780DPD+ZT = 2.5 mm; A first reinforcing plate 12 is arranged on the first crossbeam 11. The first reinforcing plate 12 is used for installing the rear seats of the vehicle and supporting the side walls of the cargo compartment.

[0060] Embodiment 2,

[0061] A vehicle includes a cargo compartment 40, a passenger compartment, and the integral cargo compartment floor skeleton assembly described in Embodiment 1. The passenger compartment is connected to the first crossbeam assembly 10 of the integral cargo compartment floor skeleton assembly, and a cargo compartment is installed on the cargo compartment skeleton assembly 20 of the integral cargo compartment floor skeleton assembly.

[0062] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integral cargo floor frame assembly, characterized in that: The invention comprises a first crossbeam assembly (10) and a cargo compartment frame assembly (20) which are connected to each other, a passenger compartment is mounted on the upper surface of the first crossbeam assembly (10), the first crossbeam assembly (10) comprises a first crossbeam (11), and a first connecting beam (14) and a second connecting beam (15) are arranged on a side of the first crossbeam (11) close to the cargo compartment frame assembly (20); The cargo compartment frame assembly (20) comprises a transverse plate (21) and a vertical plate (22), wherein the two vertical plates (22) are placed in parallel, and a plurality of transverse plates (21) are connected between the two vertical plates (22); the first connecting beam (14) is connected to one end of the vertical plate (22), and the second connecting beam (15) is connected to the transverse plate (21) close to the first cross beam assembly (10).

2. The integral cargo floor frame assembly according to claim 1, characterized in that: The horizontal plate (21) and the vertical plate (22) are connected by laser welding.

3. The integral cargo floor frame assembly according to claim 1, characterized in that: The transverse plate (21) and the vertical plate (22) respectively adopt an integrated thermoformed structural frame.

4. The integral cargo floor frame assembly according to claim 1, characterized in that: A mounting assembly (25) is provided on a side of the vertical plate (22) away from the horizontal plate (21), and the mounting assembly (25) is connected to the cargo compartment (40).

5. The integral cargo floor frame assembly according to claim 4, characterized in that: The mounting assembly (25) comprises a second mounting plate (251), the second mounting plate (251) is made by integral thermoforming, a connecting bracket (253) is connected to the second mounting plate (251), and the second mounting plate (251) is connected to the cargo compartment (40).

6. The integral cargo floor frame assembly according to claim 4, characterized in that: A suspension mounting plate (23) and a first bracket (24) are provided on a side of the vertical plate (22) away from the horizontal plate (21); the suspension mounting plate (23) is located on a side of the first bracket (24) away from the mounting assembly (25).

7. The integral cargo floor frame assembly according to claim 1, characterized in that: The cargo compartment floor frame assembly also includes a cargo compartment cross beam (30), and the cargo compartment cross beam (30) is installed on an end of the vertical plate (22) away from the first cross beam assembly (10).

8. The integral cargo floor frame assembly according to claim 7, characterized in that: The cargo compartment cross beam (30) comprises a cargo compartment cross beam support plate (31) and a second connecting plate (32); the cargo compartment cross beam support plate (31) is fixedly connected to the vertical plate (22); and the second connecting plates (32) are respectively arranged on both sides of the cargo compartment cross beam support plate (31).

9. The integral cargo floor frame assembly according to claim 1, characterized in that: The two ends of the first cross beam (11) are respectively fixedly connected with first connecting plates (13), and a first reinforcing plate (12) is arranged on the first cross beam (11).

10. A vehicle, characterized in that: It comprises a cargo compartment (40), a passenger compartment and the integral cargo compartment floor frame assembly as described in any one of claims 1 to 9, wherein the passenger compartment is connected to the first cross beam assembly (10) of the integral cargo compartment floor frame assembly, and a cargo compartment is mounted on the cargo compartment frame assembly (20) of the integral cargo compartment floor frame assembly.

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