Lower beam assembly under the cabin and pure electric vehicle

Abstract

The present invention discloses an underbody cabin crossbeam assembly and a pure electric vehicle, which include a body underbody cabin crossbeam and two front longitudinal beam castings connected to both ends of the body underbody cabin crossbeam. The body underbody cabin crossbeam is a hollow beam, and first and second overlapping edges are formed at the end of the body underbody cabin crossbeam. The first overlapping edge is located above the second overlapping edge, and the first overlapping edge extends relative to the second overlapping edge. On the side of the front longitudinal beam casting close to the body underbody cabin crossbeam, third and fourth overlapping edges are formed. The third overlapping edge is located above the fourth overlapping edge, and the fourth overlapping edge extends relative to the third overlapping edge. The first overlapping edge overlaps with the third overlapping edge, and the second overlapping edge overlaps with the fourth overlapping edge. The body underbody cabin crossbeam can be loaded from top to bottom, improving the sealing performance. The overlapping part of the first and third overlapping edges is offset relative to the overlapping part of the second and fourth overlapping edges, increasing the connection strength between the body underbody cabin crossbeam and the front longitudinal beam casting.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicles, and particularly relates to an underhood crossmember assembly and a pure electric vehicle. Background Art

[0002] In current vehicle models, such as Figures 6 to 8 , the underhood crossmember assembly includes a body underhood crossmember 1' and two front longitudinal beam castings 2' connected to both ends of the body underhood crossmember. To meet the requirement of the connection strength between the body underhood crossmember 1' and the two side front longitudinal beam castings 2', it is necessary to ensure effective connection around the body underhood crossmember 1' and the two side front longitudinal beam castings 2', and at the same time, basic performance requirements such as sealing need to be satisfied.

[0003] Such as Figures 6 to 8 , in an existing underhood crossmember assembly, the body underhood crossmember 1' adopts an extruded aluminum alloy structure, with a lapped edge 11' left at its lateral end. The front longitudinal beam casting 2' is provided with a lapped edge for lapping with the lateral end of the body underhood crossmember 1'. The body underhood crossmember 1' is installed from bottom to top vertically, so that the lateral periphery of the body underhood crossmember 1' just fits with the lapped edge reserved on the front longitudinal beam casting 2', and then it is connected by hot melt self-tapping screws (FDS).

[0004] Since the body underhood crossmember 1' fits with the front longitudinal beam casting 2' in a form of being installed from bottom to top vertically, a notch 12' needs to be left at the upper part of the lateral end of the body underhood crossmember 1' to ensure sufficient lateral clearance between it and the front longitudinal beam casting 2' to avoid interference during installation and too small assembly clearance during later use, which may cause abnormal noise during driving. However, too large a clearance will make it difficult to apply glue for sealing between the front longitudinal beam casting 2' and the body underhood crossmember 1'. In addition, the notch 12' is just in the corner area, and the non-connection between the front longitudinal beam casting 2' and the body underhood crossmember 1' at this place will affect the strength. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: aiming at the problem of insufficient connection strength in the existing solution, to provide an underhood crossmember assembly and a pure electric vehicle.

[0006] To solve the above technical problems, an embodiment of the present invention provides a lower crossbeam assembly of a cabin, which includes a lower crossbeam of a vehicle body cabin and two front longitudinal beam castings connected to both ends of the lower crossbeam of the vehicle body cabin. The lower crossbeam of the vehicle body cabin is a hollow beam. A first overlapping edge and a second overlapping edge are formed at the end of the lower crossbeam of the vehicle body cabin. The first overlapping edge is located above the second overlapping edge, and the first overlapping edge extends relative to the second overlapping edge. A third overlapping edge and a fourth overlapping edge are formed on one side of the front longitudinal beam casting close to the lower crossbeam of the vehicle body cabin. The third overlapping edge is located above the fourth overlapping edge, and the fourth overlapping edge extends relative to the third overlapping edge. The first overlapping edge overlaps with the third overlapping edge, and the second overlapping edge overlaps with the fourth overlapping edge to realize that the front longitudinal beam casting is hermetically connected to the end of the lower crossbeam of the vehicle body cabin.

[0007] Optionally, the first overlapping edge is attached to and connected with the third overlapping edge, and the second overlapping edge is attached to and connected with the fourth overlapping edge.

[0008] Optionally, the second overlapping edge is horizontally shortened from top to bottom, and the fourth overlapping edge is horizontally extended from top to bottom.

[0009] Optionally, the second overlapping edge is gradually horizontally shortened from top to bottom, and the fourth overlapping edge is gradually horizontally extended from top to bottom.

[0010] Optionally, it further includes a sealant, and the sealant seals the transverse end of the lower crossbeam of the vehicle body cabin and the corresponding front longitudinal beam casting in a whole circle.

[0011] Optionally, the sealant covers the step formed by the transverse edge of the fourth overlapping edge and the lower crossbeam of the vehicle body cabin, and the step formed by the transverse edge of the first overlapping edge and the front longitudinal beam casting.

[0012] Optionally, the lower crossbeam of the vehicle body cabin is symmetrical left and right, and the two front longitudinal beam castings are symmetrical left and right.

[0013] Optionally, the lower crossbeam of the vehicle body cabin and the front longitudinal beam casting are aluminum alloy parts;

[0014] Both between the first overlapping edge and the third overlapping edge, and between the second overlapping edge and the fourth overlapping edge are connected by heat fusion self-tapping screws.

[0015] An embodiment of the present invention also provides a pure electric vehicle, which includes the aforementioned lower crossbeam assembly of the cabin.

[0016] In the engine compartment lower crossbeam assembly and the pure electric vehicle provided by the embodiments of the present invention, the first lapping edge located above the second lapping edge extends relative to the second lapping edge, so that a lapping edge with a shorter upper part and a longer lower part is formed on the vehicle body engine compartment lower crossbeam, and the fourth lapping edge extends relative to the third lapping edge located above the fourth lapping edge, so that a lapping edge with a longer upper part and a shorter lower part is formed on the front longitudinal beam casting. In this way, the vehicle body engine compartment lower crossbeam can be installed from top to bottom between the two front longitudinal beam castings, and the first lapping edge is lapped with the third lapping edge, and the second lapping edge is lapped with the fourth lapping edge, realizing effective circumferential connection between the vehicle body engine compartment lower crossbeam and the front longitudinal beam castings at both ends thereof, thereby forming an engine compartment lower crossbeam assembly, simplifying the lapping structure, shortening the lapping working hours, eliminating the need to design a lapping gap to avoid interference during installation, and improving the sealing performance; at the same time, the lapping position of the first lapping edge and the third lapping edge is misaligned relative to the lapping position of the second lapping edge and the fourth lapping edge, increasing the connection strength between the vehicle body engine compartment lower crossbeam and the front longitudinal beam casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Structural schematic diagram of an engine compartment lower crossbeam assembly provided by the present invention;

[0018] Figure 2 is Figure 1 exploded schematic diagram of;

[0019] Figure 3 is Figure 2 Structural schematic diagram of the vehicle body engine compartment lower crossbeam shown in another perspective;

[0020] Figure 4 is Figure 1 Partial bottom view of the engine compartment lower crossbeam assembly shown;

[0021] Figure 5 is Figure 1 Partial top view of the engine compartment lower crossbeam assembly shown;

[0022] Figure 6 Structural schematic diagram of an existing engine compartment lower crossbeam assembly;

[0023] Figure 7 is Figure 6 Partial structural schematic diagram of the vehicle body engine compartment lower crossbeam in;

[0024] Figure 8 is Figure 6 Partial structural schematic diagram of the engine compartment lower crossbeam assembly shown.

[0025] The reference numerals in the specification are as follows:

[0026] 1', vehicle body engine compartment lower crossbeam; 11', lapping edge; 12', notch; 2', front longitudinal beam casting;

[0027] 1. Lower crossbeam of vehicle body engine compartment; 11. First lapping edge; 12. Second lapping edge;

[0028] 2. Front longitudinal beam casting; 21. Third lapping edge; 22. Fourth lapping edge;

[0029] 3. Reinforcing rib; 4. Sealant. Specific implementation manner

[0030] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] As Figure 1 and Figure 5 shown, a lower crossbeam assembly of an engine compartment provided by an embodiment of the present invention includes a lower crossbeam 1 of a vehicle body engine compartment and two front longitudinal beam castings 2 connected to both ends of the lower crossbeam 1 of the vehicle body engine compartment. The lower crossbeam 1 of the vehicle body is a hollow beam. A first lapping edge 11 and a second lapping edge 12 are formed at the end of the lower crossbeam 1 of the vehicle body. The first lapping edge 11 is located above the second lapping edge 12, and the first lapping edge 11 extends relative to the second lapping edge 12; a third lapping edge 21 and a fourth lapping edge 22 are formed on the side of the front longitudinal beam casting 2 close to the lower crossbeam 1 of the vehicle body. The third lapping edge 21 is located above the fourth lapping edge 22, and the fourth lapping edge 22 extends relative to the third lapping edge 21; the first lapping edge 11 is lapped with the third lapping edge 21, and the second lapping edge 12 is lapped with the fourth lapping edge 22 to realize the closed connection of the front longitudinal beam casting 2 to the end of the lower crossbeam 1 of the vehicle body.

[0032] The lapping area formed by the lapping of the first lapping edge 11 and the third lapping edge 21 is the upper lapping area, and the lapping area formed by the lapping of the second lapping edge 12 and the fourth lapping edge 22 is the lower lapping area. When in use, the upper lapping area is located inside the passenger compartment, and the lower lapping area is located outside the vehicle.

[0033] Figure 2 In

[0034] In the embodiment of the present invention, for the engine compartment lower crossbeam assembly, the first overlapping edge 11 located above the second overlapping edge 12 extends relative to the second overlapping edge 12, so that an overlapping edge with a shorter lower part and a longer upper part is formed on the vehicle body engine compartment lower crossbeam 1. The fourth overlapping edge 22 extends relative to the third overlapping edge 21 located above the fourth overlapping edge 22, so that an overlapping edge with a longer lower part and a shorter upper part is formed on the front longitudinal beam casting 2. In this way, the vehicle body engine compartment lower crossbeam 1 can be installed from top to bottom between the two front longitudinal beam castings 2, and the first overlapping edge 11 is overlapped with the third overlapping edge 21, and the second overlapping edge 12 is overlapped with the fourth overlapping edge 22, realizing effective circumferential connection between the vehicle body engine compartment lower crossbeam 1 and the front longitudinal beam castings 2 at both ends thereof, thereby forming an engine compartment lower crossbeam assembly, simplifying the overlapping structure, shortening the overlapping working hours, eliminating the need to design an overlapping gap to avoid installation interference, and improving the sealing performance. At the same time, the overlapping part of the first overlapping edge 11 and the third overlapping edge 21 is misaligned relative to the overlapping part of the second overlapping edge 12 and the fourth overlapping edge 22, increasing the connection strength between the vehicle body engine compartment lower crossbeam 1 and the front longitudinal beam casting 2.

[0035] Specifically, the third overlapping edge 21 is formed by transverse die casting and machining to eliminate the draft angle, which is beneficial to improving the overlapping accuracy.

[0036] In an embodiment, the first overlapping edge 11 is attached to and connected with the third overlapping edge 21, and the second overlapping edge 12 is attached to and connected with the fourth overlapping edge 22. The contact area between the first overlapping edge 11 and the third overlapping edge 21, and between the second overlapping edge 12 and the fourth overlapping edge 22 is increased, the strength at the overlapping part is increased, and it is easier to achieve sealing.

[0037] In an embodiment, the second overlapping edge 12 is horizontally shortened from top to bottom, and correspondingly, the fourth overlapping edge 22 is horizontally extended from top to bottom, so that the second overlapping edge 12 can be attached to the fourth overlapping edge 22, and the connection part of the second overlapping edge and the fourth overlapping edge 22 can be misaligned horizontally, increasing the connection strength between the vehicle body engine compartment lower crossbeam 1 and the front longitudinal beam casting 2.

[0038] Specifically, the second overlapping edge 12 can be horizontally shortened in sections from top to bottom, that is, a section closer to the lower side is horizontally shorter than the section above it, but the horizontal length of each section remains unchanged. Correspondingly, the fourth overlapping edge 22 is horizontally extended in sections from top to bottom, so that the second overlapping edge 12 can be attached to the fourth overlapping edge 22. Preferably, the second overlapping edge 12 is gradually horizontally shortened from top to bottom, and the fourth overlapping edge 22 is gradually horizontally extended from top to bottom, so that the connection part of the second overlapping edge and the fourth overlapping edge 22 is gradually misaligned horizontally, which is beneficial to avoiding installation interference of the vehicle body engine compartment lower crossbeam 1 and increasing the connection strength.

[0039] In an embodiment, it further includes a sealant 4( Figure 4 and Figure 5The dashed line therein shows the position of the sealant 4), and the sealant 4 seals the transverse ends of the underbody cross member 1 of the vehicle body cabin and the corresponding front longitudinal beam casting 2 in a full circle. This ensures the sealing performance between the underbody cross member 1 of the vehicle body cabin and the front longitudinal beam casting 2, preventing water and gas from entering the underbody cross member 1 of the vehicle body cabin between the underbody cross member 1 of the vehicle body cabin and the front longitudinal beam casting 2 and then entering the passenger compartment.

[0040] In one embodiment, as Figure 4 and Figure 5 shown, the sealant 4 covers the steps formed at the transverse edges of the fourth overlapping edge 22 and the underbody cross member 1 of the vehicle body cabin, and the steps formed at the transverse edges of the first overlapping edge 11 and the front longitudinal beam casting 2. Applying the sealant 4 at the steps formed at the transverse edges of the fourth overlapping edge 22 and the underbody cross member 1 of the vehicle body cabin and the steps formed at the transverse edges of the first overlapping edge 11 and the front longitudinal beam casting 2 can achieve good sealing after the overlapping is completed. It is difficult for water and gas to enter the underbody cross member 1 of the vehicle body cabin from the lower overlapping area, and it is difficult for water and gas to enter the passenger compartment from the underbody cross member 1 of the vehicle body cabin through the upper overlapping area, realizing double sealing, and it is difficult for water and gas to enter the passenger compartment again.

[0041] In one embodiment, the underbody cross member 1 of the vehicle body cabin is symmetrical left and right, and the two front longitudinal beam castings 2 are symmetrical left and right. This is beneficial to simplify the design and processing, and at the same time, the force is evenly distributed, increasing the structural stability.

[0042] In one embodiment, the underbody cross member 1 of the vehicle body cabin and the front longitudinal beam casting 2 are made of aluminum alloy parts, which are light in weight and convenient for processing.

[0043] In one embodiment, the underbody cross member 1 of the vehicle body cabin and the front longitudinal beam casting 2 are connected by heat fusion self-tapping screws. Specifically, both between the first overlapping edge 11 and the third overlapping edge 21 and between the second overlapping edge 12 and the fourth overlapping edge 22 are connected by heat fusion self-tapping screws, with good airtightness and watertightness and good dynamic load-bearing performance.

[0044] In one embodiment, as Figure 3 shown, the underbody cross member 1 of the vehicle body cabin is provided with reinforcing ribs 3 to increase the strength of the underbody cross member 1 of the vehicle body cabin. The number, distribution and thickness of the reinforcing ribs 3 are designed according to the performance requirements of the vehicle model. For vehicle models with high strength requirements for the underbody cross member 1 of the vehicle body cabin, the number and thickness of the reinforcing ribs 3 can be increased, and even multiple reinforcing ribs 3 can be crossed into a net shape.

[0045] The embodiment of the present invention also provides an electric vehicle, including the underbody cross member assembly described in any one of the foregoing embodiments.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An underbody crossmember assembly for a cabin, comprising a vehicle body underbody crossmember and two front longitudinal beam castings connected to two ends of the vehicle body underbody crossmember, wherein the vehicle body underbody crossmember is a hollow beam, characterized in that, The end of the underbody engine bay cross member is formed with a first overlapping edge and a second overlapping edge. The first overlapping edge is located above the second overlapping edge, and the first overlapping edge extends relative to the second overlapping edge. On the side of the front longitudinal beam casting close to the underbody engine bay cross member, a third overlapping edge and a fourth overlapping edge are formed. The third overlapping edge is located above the fourth overlapping edge, and the fourth overlapping edge extends relative to the third overlapping edge. The first overlapping edge overlaps with the third overlapping edge, and the second overlapping edge overlaps with the fourth overlapping edge to realize that the front longitudinal beam casting is hermetically connected to the end of the underbody engine bay cross member. Reinforcing ribs are provided inside the underbody engine bay cross member.

2. The lower crossbeam assembly of the engine room according to claim 1, characterized in that, The first overlapping edge is attached and connected to the third overlapping edge, and the second overlapping edge is attached and connected to the fourth overlapping edge.

3. The lower crossbeam assembly of the engine nacelle according to claim 1, characterized in that, The second overlapping edge is horizontally shortened from top to bottom, and the fourth overlapping edge is horizontally extended from top to bottom.

4. The lower crossbeam assembly of the engine nacelle according to claim 3, characterized in that, The second overlapping edge is gradually horizontally shortened from top to bottom, and the fourth overlapping edge is gradually horizontally extended from top to bottom.

5. The under-cabin lower crossbeam assembly according to claim 1, wherein It further includes a sealant, and the sealant hermetically seals the lateral end of the underbody engine bay cross member and the corresponding front longitudinal beam casting in a whole circle.

6. The lower crossbeam assembly of the engine nacelle according to claim 5, characterized in that The sealant covers the step formed by the lateral edge of the fourth overlapping edge and the underbody engine bay cross member, and the step formed by the lateral edge of the first overlapping edge and the front longitudinal beam casting.

7. The under-cabin lower crossbeam assembly according to claim 1, wherein The underbody engine bay cross member is symmetric left and right, and the two front longitudinal beam castings are symmetric left and right.

8. The lower crossbeam assembly of the engine room according to claim 1, characterized in that The underbody engine bay cross member and the front longitudinal beam casting are aluminum alloy parts; Between the first overlapping edge and the third overlapping edge, and between the second overlapping edge and the fourth overlapping edge, they are all connected by heat fusion self-tapping screws.

9. An all-electric vehicle, characterized in that, It includes an underbody engine bay cross member assembly according to any one of claims 1-8.

Images