A type of car wrapping frame crossbeam structure

Abstract

This invention discloses a crossbeam structure for an automotive wrap frame, comprising an upper crossbeam and a crossbeam body. The upper crossbeam is mounted on the crossbeam body and connected to form a transverse cavity structure. It also includes a pair of crossbeam partitions and a pair of side wrap frame support plates for fixing to the side frame. The ends of the transverse cavity structure formed by the upper crossbeam and the crossbeam body are connected to the corresponding side wrap frame support plates via the crossbeam partitions. The left and right partitions of the crossbeam are welded to the crossbeam body to form an assembly, then welded to the left and right side wrap frame support plates to form a stable beam structure, and then welded again to the upper crossbeam to form a closed rectangular cavity structure. This closed rectangular cavity structure effectively improves its torsional mode and bending stiffness performance indicators.

Description

Technical Field

[0001] This invention relates to the field of automotive body technology, and in particular to an automotive wrap frame crossbeam structure. Background Technology

[0002] In current models, the rear valance frame crossbeam structure of three-box sedans serves as a torsional stiffness component of the vehicle body. Together with the left and right support plates of the side valance frame, it forms a closed force transmission structure. It is one of the key ring structures in the rear assembly of three-box sedans and has a significant impact on the torsional stiffness of the vehicle body frame. At the same time, the valance frame crossbeam structure also has a certain influence on improving the torsional mode and bending stiffness of the entire vehicle.

[0003] Existing car wrap frame crossbeam structures are relatively simple, mostly simple transverse cavity structures. For example, Chinese Patent CN103770716A discloses a car wrap frame and its manufacturing method. This car wrap frame includes a wrap frame body and a front crossbeam. The front crossbeam includes an upper connecting end and a lower connecting end. The wrap frame body includes a first body and a second body. The first body includes a first connecting end and a second connecting end. The upper connecting end of the front crossbeam, the first connecting end of the first body, and the second body overlap together. The lower connecting end of the front crossbeam overlaps with the second connecting end of the first body. This structure has the following problems: low local stiffness modes, resulting in abnormal noises during road tests; insufficient structural strength, leading to weld cracking; thereby endangering passenger safety and reducing passenger comfort. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a crossbeam structure for an automotive wrapping rack, which can effectively strengthen the structural strength of the wrapping rack area and improve the local stiffness mode of the wrapping rack.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] The car wrapping rack crossbeam structure includes an upper wrapping rack crossbeam and a wrapping rack crossbeam body. The upper wrapping rack crossbeam is disposed on the wrapping rack crossbeam body and connected to form a transverse cavity structure. It also includes a pair of wrapping rack crossbeam partitions and a pair of side wrapping rack support plates for fixing to the side frame. The ends of the transverse cavity structure formed by the upper wrapping rack crossbeam and the wrapping rack crossbeam body are connected to the corresponding side wrapping rack support plates through the wrapping rack crossbeam partitions.

[0007] Further:

[0008] The parcel rack crossbeam partition is located inside the end of the transverse cavity structure to form a closed cavity structure.

[0009] The two ends of the transverse cavity structure are symmetrically connected.

[0010] The side of the parcel rack crossbeam partition is provided with two inward-folding connecting plates. One inward-folding connecting plate is welded to the upper crossbeam of the parcel rack, and the other inward-folding connecting plate is welded to the body of the parcel rack crossbeam.

[0011] The outer edge of the parcel rack crossbeam partition is provided with an outward-folding connecting plate, which is welded to the side parcel rack support plate.

[0012] The rear part of the upper beam of the parcel rack and the body of the upper beam of the parcel rack are connected to the body of the parcel rack.

[0013] The parcel rack crossbeam partition is welded to the parcel rack crossbeam body to form an assembly, and then welded to the side parcel rack support plate to form a stable beam structure. Then it is welded to the upper crossbeam of the parcel rack to form a closed rectangular cavity structure.

[0014] The cross-sectional structure of the parcel rack beam partition is "Z" shaped.

[0015] The inward-turning connecting plate is located on the inner side of the end of the transverse cavity structure.

[0016] The front part of the parcel rack body is connected between the upper beam of the parcel rack and the main body of the parcel rack to form a butt connection structure, which is welded to the side parcel rack support plate.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The car wrapping frame crossbeam structure is reasonably designed. The left and right partitions of the wrapping frame crossbeam are welded to the main body of the wrapping frame crossbeam to form an assembly. Then, it is welded to the left and right support plates of the side wrapping frame to form a stable beam structure. Then, it is welded to the upper crossbeam of the wrapping frame to form a closed rectangular cavity structure. The closed rectangular cavity structure effectively improves its torsional mode and bending stiffness and other performance indicators. Attached Figure Description

[0019] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0020] Figure 1 This is a schematic diagram of the package holder of the present invention mounted on the vehicle body.

[0021] Figure 2 This is a schematic diagram of the crossbeam structure of the parcel rack of the present invention.

[0022] Figure 3 This is a schematic diagram of the crossbeam assembly of the present invention.

[0023] Figure 4 This is a schematic diagram of the crossbeam on the parcel rack of the present invention.

[0024] Figure 5 This is a schematic diagram of the main body of the parcel rack beam of the present invention.

[0025] Figure 6 This is a schematic diagram of the end connection of the present invention.

[0026] Figure 7 This is a schematic diagram of the crossbeam partition of the parcel rack of the present invention.

[0027] Figure 8 This is a partially enlarged schematic diagram of the connection point of the present invention.

[0028] Figure 9 For along Figure 8 Schematic diagram of sectional view AA.

[0029] Figure 10 For along Figure 8 Schematic diagram of the BB section.

[0030] In the picture:

[0031] 101. Upper crossbeam of the parcel rack; 102. Parcel rack crossbeam body; 2. Parcel rack body; 3. Rear windshield crossbeam; 4. Side frame; 501. Side parcel rack support plate I; 502. Side parcel rack support plate II; 6. Welding point; 7. Parcel rack crossbeam partition. Detailed Implementation

[0032] 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.

[0033] like Figures 1 to 10 As shown, the car wrap frame crossbeam structure includes an upper wrap frame crossbeam 101, a wrap frame crossbeam body 102, a wrap frame body 2, a rear windshield crossbeam 3, a side wrap frame support plate I 501, a side wrap frame support plate II 502, and a wrap frame crossbeam partition plate 7. The left and right partition plates of the wrap frame crossbeam are connected to the upper wrap frame crossbeam and the wrap frame crossbeam body through welded joints to form a closed cavity structure, and are connected to the left and right support plates of the side wrap frame through welded joints to form a ring structure, which effectively improves the rigidity and modal characteristics of the wrap frame area.

[0034] The present invention has a reasonable design for the crossbeam structure of the car wrapping frame. The left and right partitions of the wrapping frame crossbeam are welded to the body of the wrapping frame crossbeam to form an assembly, which is then welded to the left and right support plates of the side wrapping frame to form a stable beam structure. Then, it is welded to the upper crossbeam of the wrapping frame to form a closed rectangular cavity structure. The closed rectangular cavity structure effectively improves its torsional mode and bending stiffness and other performance indicators.

[0035] Preferred,

[0036] The upper beam 101 of the parcel rack is located above the body 102 of the parcel rack. The horizontal length of the upper beam of the parcel rack and the body of the parcel rack are basically the same. The upper beam of the parcel rack is set on the body of the parcel rack and welded together to form a horizontal cavity structure.

[0037] The parcel rack crossbeam partition is a pair of parcel rack crossbeam partitions arranged symmetrically on the left and right. The side parcel rack support plate is fixed on the side frame of the vehicle body. The side parcel rack support plate is also a pair of side parcel rack support plates arranged symmetrically on the left and right. That is, the two ends of the transverse cavity structure are symmetrically connected to form a closed rectangular cavity structure, which effectively improves its torsional mode and bending stiffness and other performance indicators.

[0038] The pair of parcel rack crossbeam partitions 7 are the left parcel rack crossbeam partition and the right parcel rack crossbeam partition, respectively. The pair of side parcel rack support plates are the side parcel rack support plate I 501 and the side parcel rack support plate II 502, respectively. The ends of the transverse cavity structure formed by the upper crossbeam of the parcel rack and the body of the parcel rack crossbeam are connected to the corresponding side parcel rack support plates through the parcel rack crossbeam partitions.

[0039] The parcel rack crossbeam partition is located inside the end of the transverse cavity structure to form a closed cavity structure; the closed rectangular cavity structure effectively improves its torsional mode and bending stiffness and other performance indicators; the arrangement of the left and right partitions of the parcel rack crossbeam and its own structure are connected by weld points, which effectively improves the structural strength, reduces weld stress and avoids cracking problems.

[0040] The parcel rack crossbeam partition has two inward-facing connecting plates on its inner side. The two inward-facing connecting plates are set on the adjacent sides of the parcel rack crossbeam partition, and there is a gap between the two inward-facing connecting plates. One inward-facing connecting plate is welded to the upper crossbeam of the parcel rack, and the other inward-facing connecting plate is welded to the body of the parcel rack crossbeam.

[0041] The outer edge of the parcel rack beam partition is provided with an outward-folding connecting plate; furthermore, there are two outward-folding connecting plates, which are set on the adjacent sides of the parcel rack beam partition, with a gap between the two outward-folding connecting plates, and the two outward-folding connecting plates are welded together on the side parcel rack support plate.

[0042] The cross-sectional structure of the parcel rack crossbeam partition is "Z" shaped. The end of the through crossbeam structure can be reliably connected to the corresponding side parcel rack support plate through a parcel rack crossbeam partition, resulting in a compact, sturdy, and reliable structure. The upper crossbeam, the parcel rack crossbeam body, and the parcel rack crossbeam partition can all be formed by stamping, making manufacturing and processing simple and relatively low-cost.

[0043] The specific implementation process of the structure of this invention is as follows:

[0044] The left and right partitions of the parcel rack crossbeam are welded to the parcel rack crossbeam body to form an assembly, and then welded to the left and right support plates of the side parcel rack to form a stable beam structure. Then, they are welded to the upper crossbeam of the parcel rack to form a closed rectangular cavity structure. The left and right partitions of the parcel rack crossbeam are welded at the connection between the parcel rack crossbeam and the side support plate to strengthen the structural strength of the parcel rack area.

[0045] The inward-folding connecting plate is located on the inner side of the end of the transverse cavity structure, and the outward-folding connecting plate extends from the end of the transverse cavity and rests on the bent part of the side enclosure frame support plate. The structure is compact and the structural strength is improved.

[0046] The rear part of the upper crossbeam and the crossbeam body of the parcel rack is connected to the parcel rack body. Furthermore, the front part of the parcel rack body is connected between the upper crossbeam and the crossbeam body to form a butt joint structure. The butt joint structure is welded to the side parcel rack support plate and extends into the stacked weld to improve the local stiffness mode of the parcel rack.

[0047] Both the upper beam and the body of the parcel rack are bent structures to improve structural strength. The corresponding front and rear parts of the upper beam and the body of the parcel rack are welded together, and together with the parcel rack partition, they form a closed transverse cavity structure. A parallel rear windshield beam 3 is provided at the rear of the transverse cavity structure. The parcel rack body is a plate with an open middle section. The parcel rack body is set between the transverse cavity structure and the rear windshield beam. The side is formed by the side frame 4 to form an integral U-shaped structure, which improves the torsional stiffness of the parcel rack and enhances NVH performance.

[0048] The bending angles of both the upper beam and the main body of the parcel rack are greater than 90 degrees. The edges of the upper beam and the main body of the parcel rack are flush, making the connection simple and improving the torsional stiffness of the parcel rack. The upper beam of the parcel rack has corresponding mounting holes for the components that need to be installed, and weight reduction holes are provided on the partition body of the parcel rack, which satisfies the functional requirements while achieving a lightweight design.

[0049] like Figure 9 and Figure 10 As shown, the two inward-folding connecting plates corresponding to the crossbeam of the parcel rack are located at the top and front; they are connected by spot welding; the two outward-folding connecting plates corresponding to the crossbeam body of the parcel rack are located at the bottom and rear. The outward-folding connecting plates are connected to the crossbeam body of the parcel rack by spot welding 6. The inward-folding connecting plates and the outward-folding connecting plates are staggered, which facilitates the connection operation. The welding causes less deformation and can better control the connection accuracy.

[0050] Preferred specific examples are:

[0051] like Figure 6As shown, the parcel rack beam body 102 and parcel rack beam partition 7 are first welded together to form a parcel rack beam assembly, and then welded together with the parcel rack left support plate assembly and parcel rack right support plate assembly to form an inner main assembly; the left and right ends of the welding area of ​​the parcel rack beam partition are respectively connected and fixed to the parcel rack beam body, the parcel rack left support plate assembly, and the parcel rack right support plate assembly. The cross-section of the parcel rack beam partition is constructed in a "Z" shape, thereby improving the structural strength and stability of the connection between the parcel rack beam assembly and the parcel rack left / right support plate assemblies. Then the parcel rack upper beam and parcel rack body fall again in the Z direction. Figure 2 On the main assembly, a closed rectangular cavity structure is formed by welding. This effectively optimizes the force transmission path of the left and right side panels, suppresses vibration and deformation caused by bending and torsion in the rear area of ​​the side panels, improves the structural strength of the wrapping frame, increases the torsional stiffness of the wrapping frame, and enhances NVH performance.

[0052] In summary, the present invention provides a parcel rack crossbeam partition structure, which is connected to the upper crossbeam and the body of the parcel rack through welding points to form a closed cavity structure, and is connected to the left and right support plates of the side parcel rack through welding points to form a ring structure, effectively improving the rigidity and modal characteristics of the parcel rack area.

[0053] 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.

[0054] 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 crossbeam structure for a car wrapping rack, comprising an upper crossbeam and a crossbeam body, wherein the upper crossbeam is disposed on the crossbeam body and connected to form a transverse cavity structure, characterized in that: It also includes a pair of parcel rack crossbeam partitions and a pair of side parcel rack support plates for fixing to the side frame; the ends of the transverse cavity structure formed by the parcel rack crossbeam and the parcel rack crossbeam body are connected to the corresponding side parcel rack support plates through the parcel rack crossbeam partitions.

2. The automotive wrapping frame beam structure as described in claim 1, characterized in that: The parcel rack crossbeam partition is located inside the end of the transverse cavity structure to form a closed cavity structure.

3. The automotive wrapping frame beam structure as described in claim 1, characterized in that: The two ends of the transverse cavity structure are symmetrically connected.

4. The automotive wrapping frame beam structure as described in claim 1, characterized in that: The side of the parcel rack crossbeam partition is provided with two inward-folding connecting plates. One inward-folding connecting plate is welded to the upper crossbeam of the parcel rack, and the other inward-folding connecting plate is welded to the body of the parcel rack crossbeam.

5. The automotive wrapping frame beam structure as described in claim 4, characterized in that: The outer edge of the parcel rack crossbeam partition is provided with an outward-folding connecting plate, which is welded to the side parcel rack support plate.

6. The automotive wrapping frame beam structure as described in claim 1, characterized in that: The rear part of the upper beam of the parcel rack and the body of the upper beam of the parcel rack are connected to the body of the parcel rack.

7. The automotive wrapping frame beam structure as described in claim 2, characterized in that: The parcel rack crossbeam partition is welded to the parcel rack crossbeam body to form an assembly, and then welded to the side parcel rack support plate to form a stable beam structure. Then it is welded to the upper crossbeam of the parcel rack to form a closed rectangular cavity structure.

8. The automotive wrapping frame beam structure as described in claim 5, characterized in that: The cross-sectional structure of the parcel rack beam partition is "Z" shaped.

9. The automotive wrapping frame beam structure as described in claim 5, characterized in that: The inward-turning connecting plate is located on the inner side of the end of the transverse cavity structure.

10. The automotive wrapping frame beam structure as described in claim 6, characterized in that: The front part of the parcel rack body is connected between the upper beam of the parcel rack and the main body of the parcel rack to form a butt connection structure, which is welded to the side parcel rack support plate.

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