Chassis structure and vehicle

Abstract

The utility model provides a chassis structure and a vehicle, the chassis structure comprises a front floor assembly, a battery pack and a positioning piece, the front floor assembly comprises a front floor lower longitudinal beam, a front floor lower longitudinal beam, a front floor lower longitudinal beam and a front floor lower longitudinal beam, the reinforcing plate comprises a connecting part and a positioning part protruding out of the connecting part, the connecting part is connected to the front floor lower longitudinal beam, and the positioning part penetrates through the via hole and is provided with a positioning hole; the positioning piece is arranged on the battery pack and used for penetrating through the positioning hole to position the battery pack. The reinforcing plate is additionally arranged on the front floor lower longitudinal beam, so that the positioning part on the reinforcing plate penetrates through the through hole in the front floor lower longitudinal beam, the overall strength and impact resistance of the front floor lower longitudinal beam are effectively enhanced, and when the battery pack is replaced, the positioning piece on the battery pack can penetrate through the positioning hole in the front floor assembly to position the battery pack, so that the battery pack replacement efficiency is improved. Even if the battery pack slightly collides with the front floor assembly, the front floor lower longitudinal beam is not easy to damage, so that the problem of structural damage caused by frequent replacement of the battery pack is avoided.

Description

Technical Field

[0001] The present application relates to the field of vehicle manufacturing technology, and in particular to a chassis structure and a vehicle. Background Art

[0002] The direct disadvantage of electric vehicles compared to fuel vehicles is that it is difficult for electric vehicles to achieve the requirement of fast endurance. In order to solve this problem, the existing technology generally performs quick replacement of battery packs. When performing quick replacement of battery packs at a battery swap station, positioning holes are required on the side of the vehicle body. The battery pack is connected to the vehicle body through positioning parts. The positioning pins on the battery pack and the positioning holes on the vehicle body cooperate to ensure the positioning of the battery pack during quick replacement, thereby ensuring the installation of the battery pack.

[0003] At present, the vehicle body positioning holes are generally set on the front floor lower longitudinal beam, and the strength of the front floor lower longitudinal beam itself is relatively low. After the positioning holes are set on the front floor upper longitudinal beam, the front floor lower longitudinal beam will be hit during the daily positioning process of replacing the battery pack. In order to ensure the connection strength, the front floor lower longitudinal beam is directly welded to the front floor. The current floor lower longitudinal beam cannot be directly replaced after being damaged by an impact, resulting in the vehicle being scrapped. Utility Model Content

[0004] The present application provides a chassis structure and a vehicle to solve the technical problem that the existing front floor lower longitudinal beam is easily damaged.

[0005] The first aspect of the present invention provides a chassis structure, including a front floor assembly, a battery pack and a positioning member. The front floor assembly includes: a front floor lower longitudinal beam with a through hole; and a reinforcement plate, including a connecting portion and a positioning portion protruding from the connecting portion, the connecting portion is connected to the front floor lower longitudinal beam, the positioning portion is passed through the through hole and has a positioning hole; the positioning member is arranged on the battery pack and is used to pass through the positioning hole to position the front floor assembly and the battery pack.

[0006] In this solution, a reinforcement plate is added to the front floor lower longitudinal beam, and the positioning portion on the reinforcement plate passes through the through hole on the front floor lower longitudinal beam, thereby effectively enhancing the overall strength and impact resistance of the front floor lower longitudinal beam. When replacing the battery pack, the positioning piece on the battery pack can pass through the positioning hole on the front floor assembly to position the battery pack. At the same time, based on the setting of the reinforcement plate, even if the battery pack collides slightly with the front floor lower longitudinal beam, the front floor lower longitudinal beam is not easily damaged, thereby avoiding structural damage caused by frequent replacement of battery packs. At the same time, the reinforcement plate is installed on the front floor lower longitudinal beam as an independent component. When the reinforcement plate is damaged by impact due to replacement of the battery pack, only the reinforcement plate needs to be replaced, and there is no need to disassemble or replace the entire front floor assembly on a large scale. This greatly simplifies the maintenance process, reduces the difficulty and cost of maintenance, and also shortens the maintenance time and improves the vehicle's utilization efficiency.

[0007] In a further embodiment of the present invention, the front floor assembly further includes: a door sill beam connected to the front floor lower longitudinal beam; and a front floor sub-assembly connecting the door sill beam and the front floor lower longitudinal beam and enclosing a cavity, wherein the positioning member is at least partially disposed in the cavity.

[0008] In this solution, the rocker beam, as a key component connecting the front floor lower longitudinal beam, not only increases the lateral stability of the chassis, but also forms a solid cavity together with the front floor lower longitudinal beam and the front floor sub-assembly. The cavity can significantly improve the overall rigidity and torsional resistance of the chassis. In the event of a side collision, the rocker beam can absorb part of the impact energy and disperse the impact force to the entire chassis structure, effectively reducing the direct impact on the passenger compartment and avoiding damage to the battery pack due to the impact.

[0009] In a further embodiment of the present invention, the front floor assembly further includes a connecting member, the main body of the reinforcing plate is provided with a first connecting hole, and the front floor lower longitudinal beam is provided with a second connecting hole; the connecting member passes through the first connecting hole and the second connecting hole to connect the front floor lower longitudinal beam and the reinforcing plate.

[0010] In this solution, a connecting piece passes through the first connecting hole on the main body of the reinforcement plate and the second connecting hole on the front floor lower longitudinal beam, thereby achieving a firm connection between the reinforcement plate and the front floor lower longitudinal beam, which can withstand large forces and torques, ensuring that during vehicle driving, the reinforcement plate can stably support and protect the front floor lower longitudinal beam, preventing it from deformation or damage due to uneven force.

[0011] In a further solution of the present invention, the front floor lower longitudinal beam includes a first lower longitudinal beam and a second lower longitudinal beam, and the first lower longitudinal beam and the second lower longitudinal beam are respectively connected to both sides of the front floor sub-assembly; the reinforcement plate includes a first reinforcement plate and a second reinforcement plate, the first reinforcement plate is arranged on the first lower longitudinal beam, and the second reinforcement plate is arranged on the second lower longitudinal beam; the first reinforcement plate and the second reinforcement plate are respectively positioned on both sides of the battery pack.

[0012] In this solution, the first lower longitudinal beam and the second lower longitudinal beam are respectively connected to both sides of the front floor sub-assembly, and corresponding first reinforcement plates and second reinforcement plates are configured at the same time, so that the chassis structure presents good symmetry in the laterally direction, which is beneficial to improving the overall rigidity and stability of the chassis and reducing the distortion and deformation caused by asymmetric force. The two sides of the battery pack are respectively positioned on the positioning holes of the first reinforcement plate and the second reinforcement plate. This dual-point positioning method significantly improves the installation accuracy and stability of the battery pack.

[0013] In a further solution of the present invention, the positioning member includes a first positioning member and a second positioning member, and the positioning hole includes a first positioning hole opened on the first reinforcing plate and a second positioning hole opened on the second reinforcing plate; the first positioning hole is an oblong hole, and the second positioning hole is a circular hole. The radius of the second positioning hole is greater than the radius of the second positioning member, and the width of the first positioning hole is greater than the radius of the first positioning member.

[0014] In this solution, the first positioning hole is designed as an oblong hole. Compared with the traditional round hole design, the oblong hole provides a larger adjustment space. During the installation process, the first positioning piece can be fine-tuned within a certain range of the oblong hole to adapt to slight position deviations or installation errors, thereby improving the installation flexibility and fault tolerance.

[0015] In a further embodiment of the present invention, the sill beam includes a first sill beam and a second sill beam, and the cavity includes a first cavity and a second cavity; the first lower longitudinal beam, the front floor subassembly and the first sill beam are arranged to form a first cavity, and the first positioning member is at least partially arranged in the first cavity; the second lower longitudinal beam, the front floor subassembly and the second sill beam are arranged to form a second cavity, and the second positioning member is at least partially arranged in the second cavity.

[0016] In this solution, the space under the chassis is effectively utilized by enclosing the first lower longitudinal beam, the front floor subassembly and the first door sill beam into a first cavity, and the second lower longitudinal beam, the front floor subassembly and the second door sill beam into a second cavity, thereby forming two relatively independent closed areas. The formation of the first cavity and the second cavity not only optimizes space utilization, but also enhances the overall rigidity of the chassis structure through mutual support and constraint between the components. When the first positioning member and the second positioning member are at least partially arranged in the first cavity and the second cavity respectively, the entire chassis can maintain better stability and anti-deformation ability when subjected to external force.

[0017] In a further embodiment of the present invention, the battery pack includes a battery pack body and a first connecting part and a second connecting part arranged on both sides of the battery pack body; the first connecting part and the second connecting part protrude from the battery pack body, the first connecting part is connected to the first reinforcing plate through a first positioning member, and the second connecting part is connected to the second reinforcing plate through a second positioning member.

[0018] In this solution, the battery pack is connected to the first lower longitudinal beam and the second lower longitudinal beam respectively through the first connecting part and the second connecting part protruding on both sides of the battery pack, making the connection between the battery pack and the front floor lower longitudinal beam more direct and stable, effectively avoiding the problem of battery pack shaking or displacement caused by insufficient connection points or loose connection.

[0019] In a further solution of the present invention, the first positioning member passes through the first positioning hole to position the first connecting portion.

[0020] In a further solution of the present invention, the second positioning member passes through the second positioning hole to position the second connecting portion.

[0021] A second aspect of the present invention provides a vehicle, comprising the chassis structure provided by the first aspect of the present invention.

[0022] In summary, the chassis structure and vehicle provided by this application have at least the following beneficial effects:

[0023] By adding a reinforcement plate to the front floor lower longitudinal beam and passing the positioning portion on the reinforcement plate through the through hole on the front floor lower longitudinal beam, the overall strength and impact resistance of the front floor lower longitudinal beam are effectively enhanced. When replacing the battery pack, the positioning piece on the battery pack can pass through the positioning hole on the front floor assembly to position the battery pack. Based on the setting of the reinforcement plate, even if the battery pack has a slight collision with the front floor lower longitudinal beam, the front floor lower longitudinal beam is not easily damaged, thereby avoiding structural damage caused by frequent replacement of battery packs. At the same time, the reinforcement plate is installed on the front floor lower longitudinal beam as an independent component. When the reinforcement plate is damaged by impact due to replacement of the battery pack, only the reinforcement plate needs to be replaced. There is no need to disassemble or replace the entire front floor assembly on a large scale, which greatly simplifies the maintenance process, reduces the difficulty and cost of maintenance, and also shortens the maintenance time and improves the vehicle's utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the following briefly introduces the drawings required for the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0025] Figure 1 A schematic diagram of the chassis structure provided in an embodiment of the present application;

[0026] Figure 2 A schematic structural diagram of a reinforcement plate provided in an embodiment of the present application;

[0027] Figure 3 for Figure 1 A partial enlarged view of the C'-C' position in the middle;

[0028] Figure 4 for Figure 1 A partial enlarged view of the D'-D' position in the middle;

[0029] Figure 5 For the explosion of the front floor assembly;

[0030] Figure 6Schematic diagram of the structure of the front floor assembly;

[0031] Figure 7 for Figure 6 Cross-sectional view at A';

[0032] Figure 8 for Figure 6 Cross-sectional view at point B';

[0033] Figure 9 is a schematic diagram of the connection between the first lower longitudinal beam and the first reinforcing plate;

[0034] Figure 10 Schematic diagram of the connection between the second lower longitudinal beam and the second reinforcing plate.

[0035] The reference numerals are as follows:

[0036] 10. Battery pack; 11. First connecting portion; 12. Second connecting portion; 13. Battery pack body;

[0037] 20, front floor assembly; 20A, cavity; 21A, first cavity; 22A, second cavity;

[0038] 100. Front floor sub-assembly;

[0039] 200, front floor lower longitudinal beam; 210, first lower longitudinal beam; 210B, second connecting hole; 220, second lower longitudinal beam;

[0040] 300, reinforcing plate; 310, first reinforcing plate; 310A, first positioning hole; 310B, first connecting hole; 311, main body; 312, positioning portion; 320, second reinforcing plate; 320A, second positioning hole;

[0041] 400, threshold beam; 410, first threshold beam; 420, second threshold beam;

[0042] 500, connector;

[0043] 30. Positioning member; 31. First positioning member; 32. Second positioning member. DETAILED DESCRIPTION

[0044] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear to indicate the orientation or position relationship, unless otherwise specified, they are understood to be based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting this application.

[0045] Furthermore, the use of "first" or "second" in describing features is for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features identified. Features identified as "first" or "second" may explicitly or implicitly include at least one of the identified features. The use of the word "plurality" generally implies at least two, such as two or three, unless otherwise specifically defined.

[0046] In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration; mechanical connections, electrical connections, direct connections, or indirect connections through an intermediary; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0047] In the description of this specification, if the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0048] Please refer to Figures 1-4The first aspect of the present invention provides a chassis structure, including a front floor assembly 20, a battery pack 10 and a positioning member 30. The front floor assembly 20 includes: a front floor lower longitudinal beam 200, which is provided with a through hole; and a reinforcement plate 300, including a main body 311 and a positioning portion 312 protruding from the main body 311. The main body 311 is connected to the front floor lower longitudinal beam 200, and the positioning portion 312 is passed through the through hole and has a positioning hole; the positioning member 30 passes through the positioning hole and the mounting hole on the battery pack 10 to connect the front floor assembly 20 and the battery pack 10.

[0049] In this solution, a reinforcement plate 300 is added to the front floor lower longitudinal beam 200, and the positioning portion 312 on the reinforcement plate 300 passes through the through hole on the front floor lower longitudinal beam 200, thereby effectively enhancing the overall strength and impact resistance of the front floor assembly 20. When the battery pack is replaced, the positioning member 30 on the battery pack 10 can pass through the positioning hole on the front floor assembly 20 to position the battery pack 10, so that even if the battery pack 10 and the front floor assembly 20 have a slight collision, the front floor lower longitudinal beam 200 is not easily damaged, thereby avoiding structural damage caused by frequent replacement of the battery pack 10. At the same time, the reinforcement plate 300 is installed on the front floor lower longitudinal beam 200 as an independent component. When the reinforcement plate 300 is damaged by impact due to replacement of the battery pack 10, it is only necessary to replace the reinforcement plate 300, without the need for large-scale disassembly or replacement of the entire front floor assembly 20, which greatly simplifies the maintenance process, reduces the difficulty and cost of maintenance, and also shortens the maintenance time and improves the vehicle's utilization efficiency.

[0050] Please refer to Figure 5-Figure 8 In a further embodiment of the present invention, the front floor assembly 20 further includes: a door sill beam 400 connected to the front floor lower longitudinal beam 200; and a front floor sub-assembly 100 connecting the door sill beam 400 and the front floor lower longitudinal beam 200 to form a cavity 20A, and the positioning member 30 is at least partially disposed in the cavity 20A.

[0051] In this solution, the rocker beam 400, as a key component connecting the front floor lower longitudinal beam 200, not only increases the lateral stability of the chassis, but also forms a solid cavity 20A together with the front floor lower longitudinal beam 200 and the front floor sub-assembly 100. The cavity 20A can significantly improve the overall rigidity and torsional resistance of the chassis. In the event of a side collision, the rocker beam 400 can absorb part of the impact energy and disperse the impact force to the entire chassis structure, effectively reducing the direct impact on the passenger compartment and avoiding damage to the battery pack 10 due to the impact.

[0052] Please refer to Figure 9-10In a further embodiment of the present invention, the front floor assembly 20 further includes a connecting member 500. The main body 311 of the reinforcement plate 300 is provided with a first connecting hole 310B, and the front floor lower longitudinal beam 200 is provided with a second connecting hole 210B. The connecting member 500 passes through the first connecting hole 310B and the second connecting hole 210B to connect the front floor lower longitudinal beam 200 and the reinforcement plate 300.

[0053] In this solution, the connecting member 500 passes through the first connecting hole 310B on the main body 311 and the second connecting hole 210B on the front floor lower longitudinal beam 200, thereby achieving a firm connection between the reinforcing plate 300 and the front floor lower longitudinal beam 200. This solution is capable of withstanding large forces and torques, ensuring that the reinforcing plate 300 can stably support and protect the front floor lower longitudinal beam 200 during vehicle driving, and prevent it from deformation or damage due to uneven force.

[0054] In a further embodiment of the present invention, the front floor lower longitudinal beam 200 includes a first lower longitudinal beam 210 and a second lower longitudinal beam 220, and the first lower longitudinal beam 210 and the second lower longitudinal beam 220 are respectively connected to the two sides of the front floor sub-assembly 100; the reinforcement plate 300 includes a first reinforcement plate 310 and a second reinforcement plate 320, and the first reinforcement plate 310 is arranged on the first lower longitudinal beam 210, and the second reinforcement plate 320 is arranged on the second lower longitudinal beam 220; the first reinforcement plate 310 and the second reinforcement plate 320 are respectively positioned on both sides of the battery pack 10.

[0055] In this solution, the first lower longitudinal beam 210 and the second lower longitudinal beam 220 are respectively connected to the two sides of the front floor sub-assembly 100, and the corresponding first reinforcing plate 310 and the second reinforcing plate 320 are configured at the same time, so that the chassis structure presents good symmetry in the transverse direction, which is beneficial to improving the overall rigidity and stability of the chassis and reducing the distortion and deformation caused by asymmetric force. The two sides of the battery pack 10 are respectively positioned on the positioning holes of the first reinforcing plate 310 and the second reinforcing plate 320. This two-point positioning method significantly improves the installation accuracy and stability of the battery pack 10.

[0056] In a further solution of the present invention, the positioning member 30 includes a first positioning member 31 and a second positioning member 32, and the positioning holes include a first positioning hole 310A opened on the first reinforcing plate 310 and a second positioning hole 320A opened on the second reinforcing plate 320; the first positioning hole 310A is an oblong hole, and the second positioning hole 320A is a circular hole. The radius of the second positioning hole 320A is greater than the radius of the second positioning member 32, and the width of the first positioning hole 310A is greater than the radius of the first positioning member 31.

[0057] In this solution, the first positioning hole 310A is designed as an oblong hole. Compared with the traditional round hole design, the oblong hole provides a larger adjustment space. During the installation process, the first positioning member 31 can be fine-tuned within a certain range of the oblong hole to adapt to slight position deviations or installation errors, thereby improving the installation flexibility and fault tolerance.

[0058] Specifically, the width (one side) of the first positioning hole 310A is 0.25 mm larger than the radius of the first positioning member 31 (the total width is 32.5 mm, and the positioning member radius is 16 mm).

[0059] In a further embodiment of the present invention, the sill beam 400 includes a first sill beam 410 and a second sill beam 420, and the cavity 20A includes a first cavity 21A and a second cavity 22A; the first lower longitudinal beam 210, the front floor subassembly 100 and the first sill beam 410 are arranged to form a first cavity 21A, and the first positioning member 31 is at least partially disposed in the first cavity 21A; the second lower longitudinal beam 220, the front floor subassembly 100 and the second sill beam 420 are arranged to form a second cavity 22A, and the second positioning member 32 is at least partially disposed in the second cavity 22A.

[0060] In this solution, the first lower longitudinal beam 210, the front floor subassembly 100 and the first door sill beam 410 are enclosed into a first cavity 21A, and the second lower longitudinal beam 220, the front floor subassembly 100 and the second door sill beam 420 are enclosed into a second cavity 22A, thereby effectively utilizing the space under the chassis to form two relatively independent closed areas. The formation of the first cavity 21A and the second cavity 22A not only optimizes space utilization, but also enhances the overall rigidity of the chassis structure through mutual support and constraint between the components. When the first positioning member 31 and the second positioning member 32 are at least partially arranged in the first cavity 21A and the second cavity 22A, respectively, the entire chassis can maintain better stability and anti-deformation ability when subjected to external force.

[0061] In a further embodiment of the present invention, the battery pack 10 includes a battery pack body 13 and a first connecting portion 11 and a second connecting portion 12 arranged on both sides of the battery pack body 13; the first connecting portion 11 and the second connecting portion 12 are arranged to protrude from the battery pack body 13, and the first connecting portion 11 is connected to the first lower longitudinal beam 210 through the first positioning member 31, and the second connecting portion 12 is connected to the second lower longitudinal beam 220 through the second positioning member 32.

[0062] In this solution, the battery pack is connected to the first and second side sills 210 and 220 via the protruding first and second connection portions 11 and 12 on either side. This makes the connection between the battery pack and the front floor side sill 200 more direct and stable, effectively avoiding battery pack shaking or displacement caused by insufficient or loose connection points.

[0063] In a further embodiment of the present invention, the first positioning member 31 passes through the first positioning hole 310A to position the first connecting portion 11 .

[0064] In a further embodiment of the present invention, the second positioning member 32 passes through the second positioning hole 320A to position the second connecting portion 12 .

[0065] A second aspect of the present invention provides a vehicle, comprising the chassis structure provided by the first aspect of the present invention.

[0066] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A chassis structure, characterized in that: It comprises a front floor assembly (20), a battery pack (10) and a positioning member, wherein the front floor assembly (20) comprises: A front floor lower longitudinal beam (200) is provided with a through hole; and The reinforcing plate (300) comprises a main body (311) and a positioning portion (312) protruding from the main body (311), wherein the main body (311) is connected to the front floor lower longitudinal beam (200), and the positioning portion (312) is passed through the through hole and has a positioning hole. The positioning member (30) is provided on the battery pack (10) and is used to pass through the positioning hole to position the battery pack (10).

2. The chassis structure according to claim 1, characterized in that: The front floor assembly (20) further includes: A door sill beam (400) connected to the front floor lower longitudinal beam (200); and The front floor subassembly (100) connects the door sill beam (400) and the front floor lower longitudinal beam (200) to form a cavity, and the positioning member (30) is at least partially disposed in the cavity (20A).

3. The chassis structure according to claim 2, characterized in that: The front floor assembly (20) further includes a connecting member (500), a main body (311) of the reinforcing plate (300) is provided with a first connecting hole (310B), and a second connecting hole (210B) is provided on the front floor lower longitudinal beam (200); The connecting member (500) passes through the first connecting hole (310B) and the second connecting hole (210B) to connect the front floor lower longitudinal beam (200) and the reinforcing plate (300).

4. The chassis structure according to claim 3, characterized in that: The front floor lower longitudinal beam (200) comprises a first lower longitudinal beam (210) and a second lower longitudinal beam (220), wherein the first lower longitudinal beam (210) and the second lower longitudinal beam (220) are respectively connected to two sides of the front floor sub-assembly (100); The reinforcing plate (300) comprises a first reinforcing plate (310) and a second reinforcing plate (320), wherein the first reinforcing plate (310) is arranged on the first lower longitudinal beam (210), and the second reinforcing plate (320) is arranged on the second lower longitudinal beam (220); The first reinforcing plate (310) and the second reinforcing plate (320) are respectively positioned on both sides of the battery pack (10).

5. The chassis structure according to claim 4, characterized in that: The positioning member (30) comprises a first positioning member (31) and a second positioning member (32); the positioning hole comprises a first positioning hole (310A) provided on the first reinforcing plate (310) and a second positioning hole (320A) provided on the second reinforcing plate (320); The first positioning hole (310A) is an oblong hole, the second positioning hole (320A) is a circular hole, the radius of the second positioning hole (320A) is greater than the radius of the second positioning piece (32), and the width of the first positioning hole (310A) is greater than the radius of the first positioning piece (31).

6. The chassis structure according to claim 5, characterized in that: The threshold beam (400) includes a first threshold beam (410) and a second threshold beam (420), and the cavity (20A) includes a first cavity (21A) and a second cavity (22A); The first lower longitudinal beam (210), the front floor subassembly (100), and the first door sill beam (410) are arranged to form a first cavity (21A), and the first positioning member (31) is at least partially disposed in the first cavity (21A); The second lower longitudinal beam (220), the front floor subassembly (100) and the second door sill beam (420) are arranged to form a second cavity (22A), and the second positioning member (32) is at least partially arranged in the second cavity (22A).

7. The chassis structure according to claim 6, characterized in that: The battery pack (10) comprises a battery pack body (13) and a first connecting portion (11) and a second connecting portion (12) arranged on both sides of the battery pack body (13); The first connecting portion (11) and the second connecting portion (12) are arranged to protrude from the battery pack body (13); the first connecting portion (11) is connected to the first lower longitudinal beam (210) via the first positioning member (31); and the second connecting portion (12) is connected to the second lower longitudinal beam (220) via the second positioning member (32).

8. The chassis structure according to claim 7, characterized in that: The first positioning member (31) passes through the first positioning hole (310A) to position the first connecting portion (11).

9. The chassis structure according to claim 7, characterized in that: The second positioning member (32) passes through the second positioning hole (320A) to position the second connecting portion (12).

10. A vehicle, characterized in that: The invention comprises the chassis structure according to any one of claims 1 to 9.

Images