Body structure and vehicle

Abstract

This application discloses a vehicle body structure and a vehicle. The vehicle body structure includes rear longitudinal beams, with two rear longitudinal beams distributed along a second direction. Each rear longitudinal beam extends along a first direction and includes a first end and a second end. The first end connects to a rear bumper beam, and the second end connects to a rear floor frame. Each rear longitudinal beam has an energy-absorbing cavity extending along the first direction. Along the first direction, a first guide groove and a second guide groove are respectively provided on the rear longitudinal beam, with the second guide groove located on the side of the first guide groove closer to its second end. The opening of the first guide groove faces inwards towards the vehicle body along the second direction, and the opening of the second guide groove faces outwards towards the vehicle body along the second direction. Through the above solution, the vehicle body structure of this application can improve the energy absorption effect of the rear floor.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and in particular to a vehicle body structure and a vehicle. Background Technology

[0002] The energy-absorbing structure at the rear of the vehicle's rear floor is a crucial component of the vehicle's passive safety system, primarily designed for rear-end collisions. Its main function is to effectively absorb collision energy through controlled deformation during a rear-end collision, minimizing the impact force transmitted to the passenger compartment, protecting rear occupants, and maintaining the integrity of the passenger compartment. It mainly consists of symmetrical rear longitudinal beams that extend from the rear floor frame to the rear bumper beam.

[0003] The energy absorption effect of the existing rear section of the rear floor needs to be improved. Utility Model Content

[0004] The main technical problem addressed by this application is to provide a vehicle body structure and vehicle that can improve the energy absorption effect of the rear section of the rear floor.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: providing a vehicle body structure, including a rear longitudinal beam rear section, with two rear longitudinal beam rear sections distributed along a second direction; the rear longitudinal beam rear section extends along a first direction, and the rear longitudinal beam rear section includes a first end and a second end, the first end being used to connect with a rear anti-collision beam, and the second end being used to connect with a rear floor beam frame, the rear longitudinal beam rear section having an energy-absorbing cavity extending along the first direction; along the first direction, the rear longitudinal beam rear section is respectively provided with a first guide groove and a second guide groove, the second guide groove being located on the side of the first guide groove near the second end; wherein, the opening of the first guide groove faces the inner side of the vehicle body along the second direction, and the opening of the second guide groove faces the outer side of the vehicle body along the second direction; wherein, the first direction is the front-rear direction of the vehicle body, and the second direction is the width direction of the vehicle body.

[0006] The vehicle body structure also includes a first reinforcing plate, which is disposed in the energy absorption cavity and the edge of the first reinforcing plate is connected to the inner wall of the rear section of the rear longitudinal beam. The first reinforcing plate is disposed on the side of the second guide groove near the second end.

[0007] The vehicle body structure also includes a second reinforcing plate, which is disposed in the energy absorption cavity and is attached to the side wall of the rear section of the rear longitudinal beam. The second reinforcing plate is disposed between the first guide groove and the second guide groove. The rear section of the rear longitudinal beam is provided with a process hole that passes through the second reinforcing plate and the side wall to which the second reinforcing plate is attached.

[0008] The rear longitudinal beam includes a top plate, a bottom plate, a first side plate, and a second side plate, all extending along the first direction. The first side plate and the second side plate are spaced apart along the second direction, with the first side plate located outside the second side plate. The top plate and the bottom plate are spaced apart along the height direction. The top plate, the bottom plate, the first side plate, and the second side plate together form the energy-absorbing cavity. The second reinforcing plate includes a first sub-plate and a second sub-plate connected together. The first sub-plate is attached to the inner wall of the first side plate, and the second sub-plate is attached to the inner wall of the bottom plate.

[0009] The rear section of the rear longitudinal beam includes a first longitudinal beam member and a second longitudinal beam member. The first longitudinal beam member includes a base plate and a first side plate that are connected as one piece, with the bottom edge of the first side plate connected to the side edge of the base plate. The second longitudinal beam member includes a top plate and a second side plate that are connected as one piece, with the top edge of the second side plate connected to the side edge of the top plate.

[0010] The first induction groove and the second induction groove are disposed on the first side plate.

[0011] The rear longitudinal beam has a first flange at its first end, the plane of which the first flange is located is perpendicular to the first direction, and the vehicle body structure includes an end plate, which is connected to the first flange to cover the rear longitudinal beam.

[0012] The vehicle body structure also includes a rear reinforcing plate, which is annularly fitted to the inner side of the first end. One end of the rear reinforcing plate is also provided with a second flange, which is located on the side of the first flange away from the rear section of the rear longitudinal beam. The end plate is connected to the second flange.

[0013] Wherein, along the direction from the first end to the second end, the first side plate and / or the second side plate include a connected first part and a second part, the second part being disposed inside the first part along the second direction to form a stepped structure.

[0014] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a vehicle including the body structure described in any of the technical solutions.

[0015] The beneficial effects of this application are as follows: Unlike the prior art, the rear longitudinal beam provided in this application has a first guide groove and a second guide groove in its extension direction. The first guide groove is located on the rear side, closer to the rear bumper beam, and its opening faces inward along the width direction of the vehicle body, forming the first bending point on the rear longitudinal beam, causing the rear longitudinal beam to bend inward at the first bending point. The second guide groove is located on the front side, closer to the rear floor beam, and its opening faces outward along the width direction of the vehicle body, forming the second bending point on the rear longitudinal beam, causing the rear longitudinal beam to bend outward at the second bending point. This allows the rear longitudinal beam to deform in a "Z" shape after energy absorption and collapse, ensuring complete and sufficient energy absorption. In addition, because the rear section of the rear longitudinal beam is bent outward at the end near the rear floor beam, the rear section of the rear longitudinal beam can be deformed and separated from the rear floor beam, so that structural damage stops at the rear section of the rear longitudinal beam, avoiding damage to the rear floor beam. This ensures both the safety of the occupants and the integrity of the rear floor beam, reducing maintenance costs and difficulties. Attached Figure Description

[0016] Figure 1 This is a perspective view of an embodiment of the vehicle body structure of this application;

[0017] Figure 2 This is a side view schematic diagram of an embodiment of the rear section of the rear longitudinal beam of this application;

[0018] Figure 3 This is a schematic diagram of the internal structure of the rear section of the rear longitudinal beam in this application;

[0019] Figure 4 This is a perspective view of another embodiment of the rear section of the rear longitudinal beam in this application.

[0020] Reference numerals: 1. Vehicle body structure; 10. Rear floor beam; 11. Longitudinal beam; 12. Front crossbeam; 13. Rear crossbeam; 20. Rear section of rear longitudinal beam; 20a. First end; 20b. Second end; 201. Energy absorption cavity; 202. Process hole; 203. First part; 204. Second part; 205. First flange; 206. Step structure; 21. First longitudinal beam; 211. First side plate; 212. Bottom plate; 22. Second longitudinal beam; 221. Second side plate; 222. Top plate; 23. First guide groove; 24. Second guide groove; 25. First reinforcing plate; 26. Second reinforcing plate; 261. First sub-plate; 262. Second sub-plate; 27. End plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and effects of this application clearer and more explicit, the following detailed description is provided with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] See Figure 1 and Figure 2 , Figure 1 This is a perspective view of an embodiment of the vehicle body structure of this application. Figure 2 This is a side view schematic diagram of an embodiment of the rear longitudinal beam of this application. The vehicle body structure 1 includes a rear floor beam frame 10 and two rear longitudinal beam rear sections 20. The rear floor beam frame 10 can be a one-piece cast aluminum part, including a front crossbeam 12, a rear crossbeam 13 and two longitudinal beams 11. The front crossbeam 12, the rear crossbeam 13 and the two longitudinal beams 11 together form a frame structure. The two longitudinal beams 11 extend along the front-rear direction X of the vehicle body. The rear longitudinal beam rear sections 20 are connected to the rear end of the longitudinal beams 11. The two rear longitudinal beam rear sections 20 are distributed along the width direction Y of the vehicle body and are respectively connected to the two longitudinal beams 11.

[0023] The rear longitudinal beam rear section 20 extends along the X direction. The rear longitudinal beam rear section 20 includes a first end 20a and a second end 20b. The first end 20a is the rear end and is used to connect with the rear anti-collision beam (not shown). The rear anti-collision beam is connected between the first ends 20a of the two rear longitudinal beam rear sections 20 along the Y direction. The second end 20b is the front end and is used to connect with the longitudinal beam 11 of the rear floor beam frame 10. The rear longitudinal beam rear section 20 is hollow inside and has an energy-absorbing cavity 201 extending along the X direction. Specifically, the rear section 20 of the rear longitudinal beam includes a top plate 222, a bottom plate 212, a first side plate 211, and a second side plate 221, all extending along the X direction. The first side plate 211 and the second side plate 221 are spaced apart along the Y direction, with the first side plate 211 located outside the second side plate 221. The top plate 222 and the bottom plate 212 are spaced apart along the height direction Z. The top plate 222, the bottom plate 212, the first side plate 211, and the second side plate 221 together form an energy-absorbing cavity 201, the cross-section of which is rectangular perpendicular to the X direction. Along the X direction, the rear section 20 of the rear longitudinal beam is provided with a first guide groove 23 and a second guide groove 24, respectively. The second guide groove 24 is located on the side of the first guide groove 23 near the second end 20b, that is, the first guide groove 23 is located behind the second guide groove 24. The opening of the first guide groove 23 faces the inner side of the vehicle body along the Y direction, that is, the opening faces the rear section 20 of the other rear longitudinal beam, while the opening of the second guide groove 24 faces the outer side of the vehicle body along the Y direction, that is, the opening faces away from the rear section 20 of the other rear longitudinal beam. Specifically, the first guide groove 23 and the second guide groove 24 are disposed on the first side plate 211, with the opening of the first guide groove 23 facing the energy absorption cavity 201 and the opening of the second guide groove 24 away from the energy absorption cavity 201.

[0024] The rear longitudinal beam 20 of this application is provided with a first guide groove 23 and a second guide groove 24 in its extending direction. The first guide groove 23 is located on the rear side, that is, closer to the rear anti-collision beam. The opening of the first guide groove 23 faces inward along the width direction of the vehicle body, forming the first bending point on the rear longitudinal beam 20, causing the rear longitudinal beam 20 to bend inward at the first bending point. The second guide groove 24 is located on the front side, that is, closer to the rear floor beam 10. The opening of the second guide groove 24 faces outward along the width direction of the vehicle body, forming the second bending point on the rear longitudinal beam 20, causing the rear longitudinal beam 20 to bend outward at the second bending point. Thus, the rear longitudinal beam 20 deforms in a "Z" shape after energy absorption and collapse, fully absorbing energy. In addition, since the rear section 20 of the rear longitudinal beam is bent outward at the end near the rear floor beam 10, the rear section 20 of the rear longitudinal beam can be deformed outward and separated from the rear floor beam 10, so that structural damage stops at the rear section 20 of the rear longitudinal beam, avoiding damage to the rear floor beam 10. This ensures both the safety of the occupants and the integrity of the rear floor beam 10, reducing maintenance costs and difficulties.

[0025] Optionally, see Figure 3 , Figure 3 This is a schematic diagram of the internal structure of the rear section of the rear longitudinal beam in this application. The vehicle body structure 1 also includes a first reinforcing plate 25, which is disposed within the energy absorption cavity 201, and the edge of the first reinforcing plate 25 is connected to the inner wall of the rear section 20 of the rear longitudinal beam. The first reinforcing plate 25 is disposed on the side of the second guide groove 24 near the second end 20b. Specifically, the plane of the first reinforcing plate 25 is perpendicular to the X direction. The first reinforcing plate 25 divides the energy absorption cavity 201 into two cavities along the X direction, which can further increase the strength of the rear section 20 of the rear longitudinal beam and increase the energy absorption effect. At the same time, the edge of the first reinforcing plate 25 is provided with a flange, which extends towards the second end 20b. The first reinforcing plate 25 is connected to the inner wall of the rear section 20 of the rear longitudinal beam through the flange. The first reinforcing plate 25 is disposed on the front side of the second guide groove 24, which can strengthen the strength of the second end 20b of the rear section 20 of the rear longitudinal beam, improve the bending strength, and prevent the rear floor beam frame 10 from being damaged. Furthermore, since the first reinforcing plate 25 is located in front of the second guiding groove 24, it can further increase the strength difference between the front and rear sides of the first reinforcing plate 25. Therefore, when the rear section 20 of the rear longitudinal beam collapses and deforms, it can ensure that the rear section 20 of the rear longitudinal beam can be bent and deformed at the second guiding groove 24. Specifically, the thickness of the first reinforcing plate 25 is 1mm-2mm.

[0026] Optionally, please continue reading Figure 3The vehicle body structure 1 also includes a second reinforcing plate 26, which is disposed within the energy-absorbing cavity 201 and adheres to the side wall of the rear section 20 of the rear longitudinal beam. The second reinforcing plate 26 is positioned between the first guide groove 23 and the second guide groove 24. The rear section 20 of the rear longitudinal beam has a process hole 202 penetrating the side wall where the second reinforcing plate 26 and the second reinforcing plate 26 adhere. The second reinforcing plate 26 increases the local strength of the rear section 20 of the rear longitudinal beam between the first guide groove 23 and the second guide groove 24, reducing the probability of deformation. Simultaneously, since the rear section 20 of the rear longitudinal beam has a process hole 202 at this location, its strength is reduced to some extent; the second reinforcing plate 26 compensates for this reduction in strength. Furthermore, since the second reinforcing plate 26 is positioned between the first guide groove 23 and the second guide groove 24, reinforcement at these locations is avoided, ensuring that the rear section 20 of the rear longitudinal beam can be bent at these locations. Specifically, the thickness of the second reinforcing plate 26 is 1mm-2mm. Optionally, the thickness of the second reinforcing plate 26 can be less than the thickness of the first reinforcing plate 25.

[0027] Furthermore, the second reinforcing plate includes a first sub-plate 261 and a second sub-plate 262 connected together. The first sub-plate 261 is fitted to the inner wall of the first side plate 211, and the second sub-plate 262 is fitted to the inner wall of the bottom plate 212. Specifically, the second reinforcing plate is L-shaped and conforms to the inner wall of the rear section 20 of the rear longitudinal beam. The included angle between the first sub-plate 261 and the second sub-plate 262 is rectangular. The first sub-plate 261 is used to reinforce the first side plate 211, and the second sub-plate 262 is used to reinforce the bottom plate 212.

[0028] Optionally, see Figure 4 and combined Figure 1 , Figure 4 This is a perspective view of another embodiment of the rear longitudinal beam section 20 of this application. The rear longitudinal beam section 20 includes a first longitudinal beam member 21 and a second longitudinal beam member 22. The first longitudinal beam member 21 includes a bottom plate 212 and a first side plate 211 connected as one piece, with the bottom edge of the first side plate 211 connected to the side edge of the bottom plate 212. The second longitudinal beam member 22 includes a top plate 222 and a second side plate 221 connected as one piece, with the top edge of the second side plate 221 connected to the side edge of the top plate 222. Specifically, both the first longitudinal beam member 21 and the second longitudinal beam member 22 are sheet metal parts with an "L"-shaped cross-section. The two sheet metal parts are welded to form the rear longitudinal beam section 20. The top plate 222 is welded to the first side plate 211 by a flange, and the bottom plate 212 is welded to the second side plate 221 by a flange. The double L-shaped design makes manufacturing and matching relatively simple and has high manufacturing efficiency.

[0029] Optionally, the second guide groove 24 can also extend to the base plate 212. The opening of the second guide groove 24 on the base plate 212 is away from the energy absorption cavity 201. The second guide groove 24 protrudes into the energy absorption cavity 201 to increase the ability of the rear section 20 of the rear longitudinal beam to bend downward, so as to further increase the probability that the rear section 20 of the rear longitudinal beam will detach from the rear floor beam frame 10 after the collision.

[0030] Optionally, please continue reading Figure 4 and combined Figure 1 A first flange 205 is provided on the first end 20a of the rear longitudinal beam 20. The plane of the first flange 205 is perpendicular to the X direction. The vehicle body structure 1 includes an end plate 27, which is connected to the first flange 205 to cover the rear longitudinal beam 20. Specifically, the first flange 205 is folded outward from the first end 20a. The first flange 205 can be provided at the end of any one or more of the top plate 222, bottom plate 212, first side plate 211, and second side plate 221 to facilitate welding with the end plate 27. The end plate 27 is located at the rear end of the rear longitudinal beam 20 and is used to evenly bear the impact force from the rear and distribute it to the rear longitudinal beam 20.

[0031] Optionally, in another embodiment, the vehicle body structure 1 further includes a rear reinforcing plate (not shown). The rear reinforcing plate is annularly fitted to the inner side of the first end 20a. One end of the rear reinforcing plate is also provided with a second flange, which is located on the side of the first flange 205 away from the rear longitudinal beam 20. The end plate 27 is connected to the second flange. When the rear of the vehicle body is involved in a collision, the collision force is sequentially transmitted from the end plate 27 to the second flange, the first flange 205, the rear reinforcing plate, and the rear longitudinal beam 20. This converts the frontal collision force into a cavity tangential force and simultaneously improves the strength of the first end 20a of the rear longitudinal beam 20. Specifically, the rear reinforcing plate can be a steel plate with a thickness greater than or equal to 3 mm.

[0032] Optionally, please continue reading Figure 2 and Figure 4Along the direction from the first end 20a to the second end 20b (shown in the X direction in the figure), the first side plate 211 and the second side plate 221 include a first part 203 and a second part 204 connected together. The second part 204 is disposed inside the first part 203 along the Y direction to form a stepped structure 206. Specifically, the stepped structure 206 is disposed at the second end 20b, that is, the ends of the first side plate 211 and the second side plate 221 near the rear floor beam 10 protrude inward along the Y direction to form a stepped structure 206, so that the residual impact force transmitted along the first side plate 211 and the second side plate 221 (along the X direction) becomes a tangential peeling force along the Y direction, guiding the rear section 20 assembly of the rear longitudinal beam to move outward and deform, peeling it from the rear floor beam 10, thereby avoiding damage to the rear floor beam 10. Optionally, a stepped structure 206 can also be formed on the top plate 222. The top plate 222 near the rear floor beam 10 protrudes upward along the height direction Z to form a stepped structure 206, so that the residual impact force transmitted along the top plate 222 (along the X direction) becomes a tangential peeling force along the Z direction, guiding the rear section 20 assembly of the rear longitudinal beam to move downward and deform, further peeling it from the rear floor beam 10.

[0033] This application also provides a vehicle including the body structure 1 of any of the above embodiments. The vehicle provided by this application can be a pure gasoline vehicle, a hybrid electric vehicle, or a pure electric vehicle, and is also applicable to any other type of vehicle, such as a sports utility vehicle (SUV), off-road vehicle, MPV, etc.

[0034] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A vehicle body structure characterized by comprising: Including the rear section of the rear longitudinal beam, the two rear sections of the rear longitudinal beam are distributed along the second direction; The rear section of the rear longitudinal beam extends along a first direction. The rear section of the rear longitudinal beam includes a first end and a second end. The first end is used to connect with the rear anti-collision beam, and the second end is used to connect with the rear floor beam frame. The rear section of the rear longitudinal beam has an energy-absorbing cavity extending along the first direction. Along the first direction, the rear section of the rear longitudinal beam is provided with a first guide groove and a second guide groove, the second guide groove being located on the side of the first guide groove near the second end; wherein, the opening of the first guide groove faces the inner side of the vehicle body along the second direction, and the opening of the second guide groove faces the outer side of the vehicle body along the second direction; wherein, the first direction is the front-rear direction of the vehicle body, and the second direction is the width direction of the vehicle body.

2. The vehicle body structure according to claim 1, characterized by The vehicle body structure also includes: A first reinforcing plate is disposed inside the energy absorption cavity, and the edge of the first reinforcing plate is connected to the inner wall of the rear section of the rear longitudinal beam. The first reinforcing plate is disposed on the side of the second induction groove near the second end.

3. The vehicle body structure according to claim 1, characterized by The vehicle body structure also includes: The second reinforcing plate is disposed inside the energy absorption cavity and is attached to the side wall of the rear section of the rear longitudinal beam. The second reinforcing plate is disposed between the first induction groove and the second induction groove. The rear section of the rear longitudinal beam is provided with a process hole that passes through the second reinforcing plate and the side wall to which the second reinforcing plate is attached.

4. The vehicle body structure according to claim 3, characterized in that, The rear section of the rear longitudinal beam includes a top plate, a bottom plate, a first side plate, and a second side plate, all extending along the first direction. The first side plate and the second side plate are spaced apart along the second direction, and the first side plate is located outside the second side plate. The top plate and the bottom plate are spaced apart along the height direction. The top plate, the bottom plate, the first side plate, and the second side plate together form the energy absorption cavity. The second reinforcing plate includes a first sub-plate and a second sub-plate connected together. The first sub-plate is attached to the inner wall of the first side plate, and the second sub-plate is attached to the inner wall of the bottom plate.

5. The vehicle body structure according to claim 4, characterized in that, The rear section of the rear longitudinal beam includes a first longitudinal beam member and a second longitudinal beam member. The first longitudinal beam member includes the bottom plate and the first side plate connected as one piece, with the bottom edge of the first side plate connected to the side edge of the bottom plate. The second longitudinal beam member includes the top plate and the second side plate connected as one piece, with the top edge of the second side plate connected to the side edge of the top plate.

6. The vehicle body structure according to claim 4, characterized in that, The first induction groove and the second induction groove are disposed on the first side plate.

7. The vehicle body structure according to claim 4, characterized in that, The first end of the rear section of the rear longitudinal beam is provided with a first flange, the plane of which the first flange is located is perpendicular to the first direction, and the vehicle body structure includes an end plate, the end plate being connected to the first flange to cover the rear section of the rear longitudinal beam.

8. The vehicle body structure according to claim 7, characterized in that, The vehicle body structure also includes a rear reinforcing plate, which is annularly fitted to the inner side of the first end. One end of the rear reinforcing plate is also provided with a second flange, which is located on the side of the first flange away from the rear section of the rear longitudinal beam. The end plate is connected to the second flange.

9. The vehicle body structure according to claim 4, characterized in that, Along the direction from the first end to the second end, the first side plate and / or the second side plate include a connected first part and a second part, the second part being disposed inside the first part along the second direction to form a stepped structure.

10. A vehicle characterized by comprising: Includes the vehicle body structure as described in any one of claims 1-9.

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