Automobile cross beam and longitudinal beam connection structure assembly

Abstract

An automobile crossbeam and longitudinal beam connection structure assembly includes a crossbeam and a longitudinal beam connected to the crossbeam, the crossbeam is provided with at least a first mounting portion and a second mounting portion located above the first mounting portion, the longitudinal beam includes at least a first longitudinal plate and a second longitudinal plate located above the first longitudinal plate, the first mounting portion overlaps the first longitudinal plate, the second mounting portion overlaps the second longitudinal plate, and the first mounting portion and the first longitudinal plate and / or the second mounting portion and the second longitudinal plate are further fixedly connected. The longitudinal beam of the present invention adopts a multi-layer structure, and is connected to the crossbeam by multi-layer overlap and additional fixed connection, which improves the rigidity and strength of the overlap structure and ensures good bending and modal performance during driving.

Description

Technical Field

[0001] The invention relates to an automobile body structure, in particular to an automobile crossbeam and longitudinal beam connection structure assembly. Background Art

[0002] During the body development process, the overlap between the center channel and the cabin assembly is a crucial point, and the overlap structure involves collision safety, bending, modal and other performances. Therefore, a good overlap structure between the center channel and the cabin assembly needs to ensure collision safety and improve the comfort of the passengers.

[0003] The mainstream white body structure in the market is steel body. In order to meet the requirements of collision safety, bending, modal and other performances, two additional longitudinal beams are required as reinforcement structures at the overlap of the center channel and the cabin assembly to ensure the above performances. This structure has the problems of complex overlap structure, difficult maintenance and large number of parts. As for aluminum alloy body, due to the limitation of aluminum alloy material performance, its material strength is much lower than that of steel. If the structural design of traditional steel body is adopted, its installation point stiffness, strength and other performances are difficult or even impossible to meet the requirements.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0005] The object of the present invention is to provide a vehicle cross beam and longitudinal beam connection structure assembly with good rigidity and strength.

[0006] The present invention provides a vehicle crossbeam and longitudinal beam connection structure assembly, comprising a crossbeam and a longitudinal beam connected to the crossbeam, characterized in that the crossbeam is provided with at least a first mounting portion and a second mounting portion located above the first mounting portion, the longitudinal beam comprises at least a first longitudinal plate and a second longitudinal plate located above the first longitudinal plate, the first mounting portion overlaps the first longitudinal plate, the second mounting portion overlaps the second longitudinal plate, and the first mounting portion and the first longitudinal plate and / or the second mounting portion and the second longitudinal plate are further fixedly connected.

[0007] Furthermore, the cross beam is provided with a third mounting portion located above the second mounting portion, the longitudinal beam further comprises a third longitudinal plate located above the second longitudinal plate, and the third mounting portion is fixedly connected to the third longitudinal plate.

[0008] Furthermore, the second mounting portion is provided with a first threaded hole, the third longitudinal plate is provided with a through hole facing the first threaded hole, the third mounting portion is provided with a second threaded hole, the second mounting portion and the second longitudinal plate are also screwed together by a first bolt passing through the through hole and screwed into the first threaded hole, and the third mounting portion and the third longitudinal plate are also screwed together by a second bolt screwed into the second threaded hole.

[0009] Further, the first mounting portion is a flat plate portion, the second mounting portion is a first boss disposed above the first mounting portion, the first threaded hole is disposed on the first boss, and the third mounting portion is a second boss disposed above the second mounting portion, and the second threaded hole is disposed on the second boss.

[0010] Furthermore, the first mounting portion, the second mounting portion and the third mounting portion are staggered in the length direction of the vehicle.

[0011] Furthermore, the longitudinal beam also includes a plurality of first vertical plates connected between the first longitudinal plate and the second longitudinal plate, a plurality of second longitudinal plates located on both sides of the longitudinal beam and connected between the second longitudinal plate and the third longitudinal plate, and two side plates located on both sides of the longitudinal beam, the side plates are connected to the first longitudinal plate, the second longitudinal plate and the third longitudinal plate, and any four connected ones of the first longitudinal plate, the second longitudinal plate, the third longitudinal plate, the two side plates, the plurality of first vertical plates, and the plurality of second longitudinal plates together form a closed cavity.

[0012] Furthermore, the first vertical plate and the second vertical plate are staggered in the width direction of the vehicle.

[0013] Furthermore, the thickness of the second longitudinal plate and the third longitudinal plate is greater than the thickness of the first longitudinal plate.

[0014] Furthermore, the width of the longitudinal beam gradually decreases from bottom to top.

[0015] Furthermore, the cross beam is a cabin cross beam, the longitudinal beam is a central channel, the cabin cross beam is a casting, and the central channel is an aluminum alloy profile.

[0016] The present invention has at least one of the following beneficial effects:

[0017] 1. In the present invention, the longitudinal beam adopts a multi-layer structure, and is connected to the cross beam by multi-layer overlap and additional screw connection, which not only improves the rigidity and strength of the overlap structure, but also ensures good bending and modal performance during driving; and in the process of collision, it can better resist impact, ensure the passenger compartment space, ensure the safety of the driver, and meet the collision safety performance requirements;

[0018] 2. The aluminum alloy longitudinal beam adopts a multi-layer structure with different material thicknesses, which not only meets the rigidity and strength performance, but also achieves the purpose of lightweight;

[0019] 3. The connection structure assembly of the present invention only includes longitudinal beams and transverse beams, has a simple structure, a small number of parts, adopts screw connection, has a simple process, and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the automobile cross beam and longitudinal beam connection structure assembly provided by the present invention.

[0021] Figure 2 for Figure 1 Schematic cross-sectional view along line AA.

[0022] Figure 3 It is a schematic diagram of the crossbeam in the present invention.

[0023] Figure 4 for Figure 3 Schematic cross-sectional view along line BB.

[0024] Figure 5 It is a schematic diagram of the longitudinal beam in the present invention.

[0025] Figure 6 for Figure 5 Schematic cross-sectional view along line CC. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] Please refer to Figure 1 The automobile cross beam and longitudinal beam connection structure assembly provided in one embodiment of the present invention comprises a cross beam 10 and a longitudinal beam 20 connected to the cross beam 10. In this embodiment, the cross beam 10 is a cabin cross beam, the longitudinal beam 20 is a central channel, the cabin cross beam is a casting, and the central channel is an aluminum alloy profile. It can be understood that the automobile cross beam and longitudinal beam connection structure assembly of the present invention can also be used to connect other cross beams and longitudinal beams.

[0028] like Figures 2 to 4 As shown, the crossbeam 10 is provided with a first mounting portion 11, a second mounting portion 12 located above the first mounting portion 11, and a third mounting portion 13 located above the second mounting portion 12, and the longitudinal beam 20 includes a first longitudinal plate 21, a second longitudinal plate 22 located above the first longitudinal plate 21, and a third longitudinal plate 23 located above the second longitudinal plate 22, the first mounting portion 11 overlaps the first longitudinal plate 21, the second mounting portion 12 overlaps the second longitudinal plate 22, and the third mounting portion 13 overlaps the third longitudinal plate 23. The overlapping in this case means that the longitudinal plates are stacked on the corresponding mounting portions. It can be understood that the crossbeam 10 of the present invention is not limited to including the three mounting portions shown in this embodiment, and the longitudinal beam 20 of the present invention is not limited to including the three longitudinal plates shown in this embodiment. In other embodiments, the crossbeam 10 of the present invention may also include two mounting portions or more than three mounting portions, and the longitudinal beam 20 of the present invention may also include two longitudinal plates or more than three longitudinal plates accordingly.

[0029] In this embodiment, the first mounting portion 11 is a flat plate portion, specifically, the first mounting portion 11 is a flange formed at the bottom of the cabin cross beam 10. The second mounting portion 12 is a first boss disposed above the first mounting portion 11, and the third mounting portion 13 is a second boss disposed above the second mounting portion 12. The first mounting portion 11, the second mounting portion 12 and the third mounting portion 13 are staggered in the length direction of the vehicle, and the three are also staggered in the height direction, so that the first mounting portion 11, the second mounting portion 12 and the third mounting portion 13 are arranged in a stepped shape. A first threaded hole 14 is provided on the first boss, a second threaded hole 15 is provided on the second boss, a through hole 29 is provided on the third longitudinal plate 23 facing the first threaded hole 14, the second mounting portion 12 and the second longitudinal plate 22 are also screwed together by a first bolt 17 passing through the through hole 29 and screwed into the first threaded hole 14, and the third mounting portion 13 and the third longitudinal plate 23 are also screwed together by a second bolt 18 screwed into the second threaded hole 15. That is, the second mounting portion 12 and the second longitudinal plate 22, and the third mounting portion 13 and the third longitudinal plate 23 are further fixedly connected after overlapping. In this embodiment, the first threaded hole 14 and the second threaded hole 15 are both self-tapping threaded holes, and threaded sleeves are arranged inside them. In order to meet the strength performance requirements of the middle channel, the thickness of the screw connection layer with greater force in the middle channel is greater than the thickness of the supporting layer with less force, that is, the thickness of the second longitudinal plate 22 and the third longitudinal plate 23 is greater than the thickness of the first longitudinal plate 21. Such a design can achieve the purpose of lightweight while ensuring the strength of the middle channel.

[0030] It should be noted that, in the present embodiment, the first mounting portion 11 is overlapped with the first longitudinal plate 21, and the second mounting portion 12 is overlapped with the second longitudinal plate 22, and the third mounting portion 13 is further fixedly connected with the third longitudinal plate 23 after the overlap. It can be understood that in the present invention, the overlapping connection method is not limited to between the first mounting portion 11 and the first longitudinal plate 21, and it can also be between the second mounting portion 12 and the second longitudinal plate 22. When the second mounting portion 12 and the second longitudinal plate 22 are only connected by overlapping, the connection method of the first mounting portion 11 and the first longitudinal plate 21 can be set to be fixedly connected after overlapping (for example, welding). In other embodiments of the present invention, the fixing methods of the first mounting portion 11 and the first longitudinal plate 21, the second mounting portion 12 and the second longitudinal plate 22, and the third mounting portion 13 and the third longitudinal plate 23 can also be set to be further fixedly connected after overlapping.

[0031] like Figure 5 and Figure 6As shown, the cross section of the longitudinal beam 20 is roughly an isosceles trapezoid, so that the width of the longitudinal beam 20 gradually decreases from bottom to top. The longitudinal beam 20 also includes a plurality of first vertical plates 24 connected between the first longitudinal plate 21 and the second longitudinal plate 22, a plurality of second vertical plates 25 connected between the second longitudinal plate 22 and the third longitudinal plate 23, two side plates 26 located on both sides of the longitudinal beam 20, and flanges 27 formed by extending outward from the bottom of the side plates 26. The flanges 27 are used to be connected to the floor crossbeam 10. The side plates 26 are connected to the first longitudinal plate 21, the second longitudinal plate 22 and the third longitudinal plate 23, and any four of the first longitudinal plate 21, the second longitudinal plate 22, the third longitudinal plate 23, the two side plates 26, the plurality of first vertical plates 24 and the plurality of second vertical plates 25 are enclosed to form a closed cavity 28. The first vertical plates 24 and the second vertical plates 25 are staggered in the width direction of the car, which can improve the force transmission path of the middle channel and enhance the buffering effect of the middle channel.

[0032] It can be seen from the above structural description that the present invention has at least one of the following beneficial effects:

[0033] 1. In the present invention, the central channel adopts a three-layer structure, and is connected to the cabin cross beam by three-layer overlap and double-layer screw connection to form an integral beam frame structure, which improves the rigidity and strength of the overlap structure and ensures good bending and modal performance during driving; and in the process of collision, it can better resist impact, ensure the passenger compartment space, ensure the driver's safety, and meet the collision safety performance requirements;

[0034] 2. The aluminum alloy center channel adopts a three-layer structure with different material thicknesses, which not only meets the rigidity and strength performance, but also achieves the purpose of lightweight;

[0035] 3. The connection structure assembly of the present invention only includes the central channel and the cabin cross beam, has a simple structure, a small number of parts, adopts screw connection, has a simple process, and is easy to maintain.

[0036] In this document, “upper”, “lower”, “front” and “rear” all refer to the relative positions of corresponding components on the vehicle body after being installed.

[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0039] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A vehicle crossbeam and longitudinal beam connection structure assembly, comprising a crossbeam (10) and a longitudinal beam (20) connected to the crossbeam (10), characterized in that: The cross beam (10) is provided with at least a first mounting portion (11) and a second mounting portion (12) located above the first mounting portion (11); the first mounting portion (11) is a flat plate; the second mounting portion (12) is a first boss located above the first mounting portion (11); the first mounting portion (11) and the second mounting portion (12) are staggered in the length direction of the vehicle; the first mounting portion (11) and the second mounting portion (12) are staggered in the height direction of the vehicle; the longitudinal beam (20) comprises at least a first longitudinal plate (21) and a second longitudinal plate (22) located above the first longitudinal plate (21); the first mounting portion (11) and the first longitudinal plate (21) are overlapped; the second mounting portion (12) and the second longitudinal plate (22) are overlapped; and the first mounting portion (11) and the first longitudinal plate (21) and / or the second mounting portion (12) and the second longitudinal plate (22) are further fixedly connected; The cross beam (10) is also provided with a third mounting portion (13) located above the second mounting portion (12); the longitudinal beam (20) further comprises a third longitudinal plate (23) located above the second longitudinal plate (22); the third mounting portion (13) is fixedly connected to the third longitudinal plate (23).

2. The automobile cross beam and longitudinal beam connection structure assembly according to claim 1, characterized in that: The second mounting portion (12) is provided with a first threaded hole (14), the first threaded hole (14) is provided on the first boss, the third longitudinal plate (23) is provided with a through hole (29) facing the first threaded hole (14), the third mounting portion (13) is provided with a second threaded hole (15), the second mounting portion (12) and the second longitudinal plate (22) are also screwed together by a first bolt (17) passing through the through hole (29) and screwed into the first threaded hole (14), and the third mounting portion (13) and the third longitudinal plate (23) are also screwed together by a second bolt (18) screwed into the second threaded hole (15).

3. The automobile cross beam and longitudinal beam connection structure assembly as claimed in claim 2, characterized in that: The third mounting portion (13) is a second boss disposed above the second mounting portion (12), and the second threaded hole (15) is disposed on the second boss.

4. The automobile cross beam and longitudinal beam connection structure assembly as claimed in claim 1, characterized in that: The first mounting portion (11), the second mounting portion (12) and the third mounting portion (13) are staggered in the length direction of the vehicle.

5. The automobile cross beam and longitudinal beam connection structure assembly as claimed in claim 1, characterized in that: The longitudinal beam (20) further comprises a plurality of first vertical plates (24) connected between the first longitudinal plate (21) and the second longitudinal plate (22), a plurality of second vertical plates (25) connected between the second longitudinal plate (22) and the third longitudinal plate (23), and two side plates (26) located on both sides of the longitudinal beam (20), wherein the side plates (26) are connected to the first longitudinal plate (21), the second longitudinal plate (22) and the third longitudinal plate (23), and any four connected ones of the first longitudinal plate (21), the second longitudinal plate (22), the third longitudinal plate (23), the two side plates (26), the plurality of first vertical plates (24) and the plurality of second vertical plates (25) are enclosed to form a closed cavity (28).

6. The automobile cross beam and longitudinal beam connection structure assembly as claimed in claim 5, characterized in that: The first vertical plate (24) and the second vertical plate (25) are staggered in the width direction of the vehicle.

7. The automobile cross beam and longitudinal beam connection structure assembly according to claim 1 or 2, characterized in that: The thickness of the second longitudinal plate (22) and the third longitudinal plate (23) is greater than the thickness of the first longitudinal plate (21).

8. The automobile cross beam and longitudinal beam connection structure assembly as claimed in claim 1, characterized in that: The width of the longitudinal beam (20) gradually decreases from bottom to top.

9. The automobile cross beam and longitudinal beam connection structure assembly as claimed in claim 1, characterized in that: The cross beam (10) is a cabin cross beam, the longitudinal beam (20) is a central channel, the cabin cross beam is a casting, and the central channel is an aluminum alloy profile.

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