Integrated new energy vehicle body front longitudinal beam rear section assembly structure

Abstract

The utility model relates to an integrated new energy automobile body front longitudinal beam rear section assembly structure, which belongs to the field of automobile front longitudinal beams and comprises a front longitudinal beam rear section body (1), a front longitudinal beam rear section reinforcing plate (2) is arranged on the front longitudinal beam rear section body (1), and the end portion of the front longitudinal beam rear section body (1) is respectively connected with a front longitudinal beam body (3), an A column inner plate lower section (4) and a dash panel lower cross beam (5). The front longitudinal beam rear section body (1) is of a triangular structure and higher in integration, the front longitudinal beam rear section reinforcing plate (2) is of a fan-shaped structure and better in stress, the first reinforcing rib (6) and the second reinforcing rib (7) are arranged on the front longitudinal beam rear section reinforcing plate (2), the rigidity of the front longitudinal beam rear section body is enhanced, and collision force transmission is guided. A plurality of grooves (13) are formed in the front longitudinal beam body (3) to form a collapse area, impact energy is absorbed through controllable collapse deformation, and buffering protection is provided for other rigid components.

Description

Technical Field

[0001] This utility model belongs to the field of automotive front longitudinal beams. Specifically, this utility model relates to an integrated structure of the rear section of the front longitudinal beam of a new energy vehicle body. Background Technology

[0002] With the rapid development of the new energy vehicle market, the design and manufacturing of electric vehicles has become an important direction for the automotive industry. In the design of electric vehicles, due to historical reasons in the automotive industry's development from gasoline vehicles to electric vehicles, the development of shared platforms for both gasoline and electric vehicles often prioritizes the use of structures commonly found in gasoline vehicles. For example, the aforementioned front longitudinal beam rear assembly structure mainly connects the front longitudinal beam, floor longitudinal beam, center tunnel, and sill, resulting in a complex connection structure. Traditional solutions primarily connect the front longitudinal beam and floor longitudinal beam, while adding sill connecting plates and subframe rear mounting plates to connect the sill and center tunnel laterally. This approach leads to problems in actual production, such as more parts, more processes, more welding points, and difficulties in dimensional control. Furthermore, the traditional front longitudinal beam design cannot effectively transmit collision forces and energy.

[0003] Chinese patent CN216861598U, filed on July 1, 2022, provides a front longitudinal beam, a front longitudinal beam assembly, and a vehicle. The front longitudinal beam of the vehicle includes a front longitudinal beam body and an inner strength reinforcing plate. The front longitudinal beam body includes an inner plate and an outer plate. The inner plate and the outer plate are fixedly connected to form a cavity to enhance the stiffness and strength of the front longitudinal beam. The inner strength reinforcing plate is fixed to the rear of the front longitudinal beam to increase the strength of the rear of the front longitudinal beam and guide the transmission of collision force. However, it cannot achieve the integration of the rear assembly structure of the front longitudinal beam, and the energy absorption effect after the collision is not good enough, and the stiffness is not large enough. Utility Model Content

[0004] The present invention aims to provide a highly integrated and rigid front longitudinal beam rear section assembly structure to solve problems such as numerous parts leading to numerous processes and welding points in actual production.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An integrated new energy vehicle body front longitudinal beam rear section assembly structure includes a front longitudinal beam rear section body, a front longitudinal beam rear section reinforcing plate provided on the front longitudinal beam rear section body, one end of the front longitudinal beam rear section body is connected to the lower crossbeam of the front bulkhead of the vehicle body, and the other end of the front longitudinal beam rear section body is connected to the front longitudinal beam body and the lower section of the A-pillar inner panel respectively.

[0007] The rear section of the front longitudinal beam has a U-shaped groove inside, and the rear section reinforcing plate of the front longitudinal beam and the rear section of the front longitudinal beam are connected to form a cavity.

[0008] The front longitudinal beam rear section reinforcing plate is provided with a first reinforcing rib and a second reinforcing rib.

[0009] The cross-section of the rear section of the front longitudinal beam is triangular; the reinforcing plate of the rear section of the front longitudinal beam is fan-shaped.

[0010] The first reinforcing rib is arc-shaped, and the second reinforcing rib is arc-shaped.

[0011] The rear section reinforcing plate of the front longitudinal beam and the rear section body of the front longitudinal beam are fixedly connected by spot welding.

[0012] The lower section of the inner panel of the A-pillar is connected to the inner panel of the sill, and the connection between the inner panel of the sill and the lower section of the inner panel of the A-pillar is provided with mounting holes.

[0013] A battery pack mounting beam is connected to one side of the inner sill plate.

[0014] The rear section of the front longitudinal beam is provided with a mounting seat at one end, and the mounting seat is connected to the front subframe of the vehicle body.

[0015] The front longitudinal beam body is provided with a groove.

[0016] The technical advantages of this utility model are as follows: The front longitudinal beam rear section body with a triangular structure is connected to the front longitudinal beam body, the lower section of the A-pillar inner panel and the lower crossbeam of the front bulkhead respectively, which simplifies the connection structure and increases the integration. The front longitudinal beam rear section reinforcing plate and the front longitudinal beam rear section body are connected by a snap-fit ​​to form a cavity. The longitudinal beam rear section reinforcing plate is provided with a bent first reinforcing rib and a second reinforcing rib to enhance the rigidity of the front longitudinal beam rear section body and guide the transmission of collision force. The front longitudinal beam body is provided with multiple grooves to form a crumple zone, which absorbs impact energy through controllable crumple deformation, reduces the impact force transmitted to the passenger compartment, and provides buffer protection for other rigid components. Attached Figure Description

[0017] This manual includes the following figures, which illustrate the following:

[0018] Figure 1 This is a schematic diagram of the rear section of the front longitudinal beam assembly of an integrated new energy vehicle body.

[0019] Figure 2 for Figure 1 A schematic diagram of the structure after removing the reinforcing plate from the rear section of the front longitudinal beam.

[0020] Figure 3 for Figure 1 Schematic diagram of the main body structure of the rear section of the front longitudinal beam.

[0021] The markings in the diagram are as follows: 1. Rear section of the front longitudinal beam; 2. Rear section of the front longitudinal beam reinforcement plate; 3. Front longitudinal beam body; 4. Lower section of the A-pillar inner panel; 5. Lower crossbeam of the front bulkhead; 6. First reinforcing rib; 7. Second reinforcing rib; 8. Inner sill plate; 9. Mounting hole; 10. Battery pack mounting longitudinal beam; 11. Mounting seat; 12. U-shaped groove; 13. Groove. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of this utility model, and to facilitate its implementation.

[0023] like Figure 1 and Figure 2 As shown, an integrated new energy vehicle body front longitudinal beam rear section assembly structure includes a front longitudinal beam rear section body 1, a front longitudinal beam rear section reinforcing plate 2 on the front longitudinal beam rear section body 1, one end of the front longitudinal beam rear section body 1 connected to the front bulkhead lower crossbeam 5 of the vehicle body, and the other end of the front longitudinal beam rear section body 1 connected to the front longitudinal beam body 3 and the lower section of the A-pillar inner panel 4 respectively. The front longitudinal beam rear section body 1 is designed as a triangular structure, with the three vertices of the triangle connected to the front longitudinal beam body 3, the lower section of the A-pillar inner panel 4, and the front bulkhead lower crossbeam 5 respectively. By merging and simplifying the front longitudinal beam rear section assembly structure, the integration of parts at this location results in higher integration. The integrated structure improves rigidity and collision energy transmission, and the use of sheet metal structure reduces costs compared to cast aluminum structures.

[0024] like Figure 3 As shown, the rear section of the front longitudinal beam body 1 has a U-shaped groove 12 inside, and the rear section reinforcing plate 2 and the rear section body 1 of the front longitudinal beam are connected to form a cavity. The rear section body 1 of the front longitudinal beam is generally triangular. The U-shaped groove 12 inside the rear section body 1 forms a U-shaped structure at the bottom and sidewalls of the rear section body 1. The rear section reinforcing plate 2 and the U-shaped groove 12 are connected by fastening to form a cavity. Originally, the included angle between the front longitudinal beam body 3 and the rear section body 1 of the front longitudinal beam was small. By connecting the rear section reinforcing plate 2 and the rear section body 1 of the front longitudinal beam to form a cavity structure, the included angle is increased, the overall shape is flatter, the stress effect is better, and the rigidity is greater.

[0025] The front longitudinal beam rear section reinforcing plate 2 is provided with a first reinforcing rib 6 and a second reinforcing rib 7. The first reinforcing rib 6 and the second reinforcing rib 7 on the front longitudinal beam rear section reinforcing plate 2 are used to enhance the rigidity of the front longitudinal beam rear section body 1 and guide the impact force on the front longitudinal beam body 3 to the lower section 4 of the A-pillar inner plate, the inner sill plate 8 and the battery pack mounting longitudinal beam 10.

[0026] The rear section of the front longitudinal beam 1 has a triangular cross-section; the rear reinforcing plate 2 of the front longitudinal beam has a fan-shaped structure. The triangular structure itself has stability and is used to connect with the front longitudinal beam 3, the lower section of the A-pillar inner panel 4, and the lower crossbeam of the front bulkhead 5 respectively, resulting in higher integration and greater rigidity. The fan-shaped structure of the rear reinforcing plate 2 of the front longitudinal beam, with a fan-shaped gradient cross-section design, expands the stress-bearing area and disperses the collision energy of the front longitudinal beam 3 to the lower section of the A-pillar inner panel 4, the sill inner panel 8, the battery pack mounting longitudinal beam 10, and the lower crossbeam of the front bulkhead 5.

[0027] The first reinforcing rib 6 is arc-shaped, and the second reinforcing rib 7 is arc-shaped. The arc-shaped first reinforcing rib 6 effectively transfers the impact force from the front longitudinal beam body 3 to the lower section 4 of the A-pillar inner panel and the inner sill panel 8. The arc-shaped second reinforcing rib 7 effectively transfers the impact force from the front longitudinal beam body 3 to the inner sill panel 8 and the battery pack mounting longitudinal beam 10.

[0028] The rear section reinforcing plate 2 of the front longitudinal beam and the rear section body 1 of the front longitudinal beam are fixedly connected by spot welding. The front longitudinal beam rear section reinforcing plate 2 and the front longitudinal beam rear section body 1 are designed to be fastened by spot welding. The spot welding forms a closed cross-section structure, which can improve the torsional stiffness of the vehicle body and effectively reduce vibration and noise during continuous driving. Spot welding is suitable for lightweight materials with high tensile strength, high strength, low deformation, and high adaptability, taking into account both vehicle body safety and economy.

[0029] The lower section 4 of the A-pillar inner panel is connected to the sill inner panel 8, and a mounting hole 9 is provided at the connection between the sill inner panel 8 and the lower section 4 of the A-pillar inner panel. The reserved mounting hole 9 is used for fixing components such as battery packs and wiring harnesses.

[0030] A battery pack mounting longitudinal beam 10 is connected to one side of the inner door sill panel 8. The lower section 4 of the inner A-pillar panel is connected to the inner door sill panel 8. Compared with fuel vehicles, electric vehicles in the field of new energy vehicles have an additional battery pack mounting longitudinal beam 10.

[0031] A mounting seat 11 is provided at one end of the rear section of the front longitudinal beam body 1, and the mounting seat 11 is connected to the front subframe of the vehicle body. The mounting seat 11 is a square plate structure and is fixed to the rear section of the front longitudinal beam body 1 by spot welding. The mounting seat 11 is used to connect with the front subframe by bolting or welding, forming a key support point for the engine mounting system. The stress can be distributed to the longitudinal beam and the body frame through the subframe, avoiding stress concentration.

[0032] The front longitudinal beam body 3 is provided with grooves 13. Multiple grooves 13 are provided on the front longitudinal beam body 3 to form a pre-set collapse zone that collapses in stages, transferring the impact force on the front longitudinal beam body 3 to the rear section body 1 of the front longitudinal beam and the rear section reinforcing plate 2 of the front longitudinal beam. Through the multiple pre-set grooves 13, the deformation direction is controlled to ensure that the energy is dispersed rearward along a predetermined path, reducing the risk of torsion of the vehicle body frame.

[0033] The working principle of this utility model:

[0034] An integrated new energy vehicle body front longitudinal beam rear section assembly structure includes a front longitudinal beam rear section body 1, a front longitudinal beam rear section reinforcing plate 2 on the front longitudinal beam rear section body 1, the front longitudinal beam rear section body 1 is designed as a triangular structure, the three apex ends of the front longitudinal beam rear section body 1 are respectively connected to the front longitudinal beam body 3, the lower section of the A-pillar inner panel 4 and the lower crossbeam of the front bulkhead 5, which has higher integration and greater rigidity. The U-shaped groove 12 of the front longitudinal beam rear section reinforcing plate 2 and the front longitudinal beam rear section body 1 are connected by snap-fit ​​to form a cavity, which is flatter overall, has better stress effect and greater rigidity. The front longitudinal beam rear section reinforcing plate 2 is provided with a first reinforcing rib 6 and a second reinforcing rib 7 to enhance the rigidity of the front longitudinal beam rear section body 1 and guide the transmission of collision force. The arc-shaped first reinforcing rib 6 effectively transmits the collision force from the front longitudinal beam body 3 to the lower section of the A-pillar inner panel 4 and the inner panel of the sill 8. The arc-shaped second reinforcing rib 7 effectively transfers the impact force from the front longitudinal beam body 3 to the sill inner panel 8 and the battery pack mounting longitudinal beam 10. The rear section reinforcing plate 2 of the front longitudinal beam has a fan-shaped structure, which expands the stress-bearing area. Mounting holes 9 are provided at the connection between the sill inner panel 8 and the lower section 4 of the A-pillar inner panel. The battery pack mounting longitudinal beam 10 is connected to one side of the sill inner panel 8. The reserved mounting holes 9 are used for fixing components such as the battery pack and wiring harness. The rear section reinforcing plate 2 and the rear section body 1 of the front longitudinal beam are fixedly connected by spot welding to form a closed section, resulting in high strength and low deformation. A mounting seat 11 is provided at one end of the rear section body 1 of the front longitudinal beam, which is connected to the front subframe. The front longitudinal beam body 3 has grooves 13. Multiple pre-set grooves 13 control the deformation direction, ensuring that energy is dispersed rearward along a predetermined path, reducing the risk of torsion of the vehicle frame, reducing the impact force transmitted to the passenger compartment, and providing buffer protection for other rigid components.

[0035] 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 inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An integrated front longitudinal beam rear section assembly structure for a new energy vehicle body, characterized in that: It includes a rear section body (1) of the front longitudinal beam, and a rear section reinforcing plate (2) of the front longitudinal beam is provided on the rear section body (1). One end of the rear section body (1) of the front longitudinal beam is connected to the lower crossbeam (5) of the front bulkhead of the vehicle body, and the other end of the rear section body (1) of the front longitudinal beam is connected to the front longitudinal beam body (3) and the lower section (4) of the inner panel of the A-pillar respectively.

2. The integrated new energy vehicle body front longitudinal beam rear section assembly structure according to claim 1, characterized in that: The rear section of the front longitudinal beam body (1) is provided with a U-shaped groove (12), and the rear section reinforcing plate (2) of the front longitudinal beam and the rear section body (1) of the front longitudinal beam are connected to form a cavity.

3. The integrated new energy vehicle body front longitudinal beam rear section assembly structure according to claim 2, characterized in that: The front longitudinal beam rear section reinforcing plate (2) is provided with a first reinforcing rib (6) and a second reinforcing rib (7).

4. The integrated new energy vehicle body front longitudinal beam rear section assembly structure according to claim 3, characterized in that: The cross-section of the rear section of the front longitudinal beam (1) is a triangular structure; the reinforcing plate (2) of the rear section of the front longitudinal beam is a fan-shaped structure.

5. The integrated new energy vehicle body front longitudinal beam rear section assembly structure according to claim 4, characterized in that: The first reinforcing rib (6) is arc-shaped, and the second reinforcing rib (7) is arc-shaped.

6. The integrated new energy vehicle body front longitudinal beam rear section assembly structure according to claim 5, characterized in that: The front longitudinal beam rear section reinforcing plate (2) and the front longitudinal beam rear section body (1) are fixedly connected by spot welding.

7. The integrated new energy vehicle body front longitudinal beam rear section assembly structure according to any one of claims 1-6, characterized in that: The lower section (4) of the inner panel of the A-pillar is connected to the inner panel of the sill (8), and the connection between the inner panel of the sill (8) and the lower section (4) of the inner panel of the A-pillar is provided with a mounting hole (9).

8. The integrated new energy vehicle body front longitudinal beam rear section assembly structure according to claim 7, characterized in that: A battery pack mounting beam (10) is connected to one side of the inner sill plate (8).

9. The integrated new energy vehicle body front longitudinal beam rear section assembly structure according to any one of claims 1-6, characterized in that: The rear section of the front longitudinal beam (1) is provided with a mounting seat (11) at one end, and the mounting seat (11) is connected to the front subframe of the vehicle body.

10. An integrated new energy vehicle body front longitudinal beam rear section assembly structure according to any one of claims 1-6, characterized in that: The front longitudinal beam body (3) is provided with a groove (13).

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