Middle floor assembly, chassis and vehicle

Abstract

The utility model discloses a middle floor assembly, a chassis and a vehicle, the middle floor assembly comprises a middle floor and doorsill longitudinal beams, the doorsill longitudinal beams are arranged at the left end and the right end of the middle floor, and the doorsill longitudinal beams extend in the front-back direction. The front end and the rear end of the middle floor assembly are each provided with a first sealing face used for bearing the first sealing layer and a second sealing face used for bearing the second sealing layer, the first sealing faces and the second sealing layers are sealants, and the first sealing faces face upwards and comprise first main body parts and first extending parts. The second sealing surface faces upwards and comprises a second main body part and a second extending part, the first main body part and the second main body part are arranged on the middle floor and extend in the left-right direction, and the first extending part and the second extending part are arranged on the doorsill longitudinal beam and are higher than the first main body part and the second main body part correspondingly; and the first extension part and the second extension part obliquely extend in the direction from bottom to top. According to the middle floor assembly provided by the embodiment of the utility model, the sealing quality of the chassis can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a floor assembly, chassis and vehicle. Background Technology

[0002] The chassis is an important component of a vehicle. It is usually assembled from multiple parts, and the assembly gaps of the chassis need to be sealed to improve its waterproofness.

[0003] In related technologies, some chassis sealing solutions use sealing strips or sealing foam mating surfaces for sealing. However, a seal cannot be achieved solely by pressing the sealing strip together; it requires the use of sealant to supplement the seal. This sealing method, which combines sealing strips or sealing foam with sealant, has poor sealing performance and is prone to water leakage. Therefore, improving the sealing quality of the chassis is a technical problem that needs to be solved. Utility Model Content

[0004] This utility model provides a center floor assembly, a chassis, and a vehicle, wherein the chassis having the center floor assembly has good sealing quality.

[0005] In a first aspect, this utility model proposes a middle floor assembly, comprising: a middle floor and a sill beam, wherein the sill beam is disposed at the left and right ends of the middle floor and extends in a front-to-back direction; the front end of the middle floor assembly has a first sealing surface for bearing a first sealing layer, the first sealing layer being a sealant, the first sealing surface facing upward and including a first main body and a first extension, the first main body being disposed on the middle floor and extending in a left-to-right direction, the first extension being disposed on the sill beam and higher than the first main body, the first extension extending obliquely in a bottom-to-top direction; the rear end of the middle floor assembly has a second sealing surface for bearing a second sealing layer, the second sealing layer being a sealant, the second sealing surface facing upward and including a second main body and a second extension, the second main body being disposed on the middle floor and extending in a left-to-right direction, the second extension being disposed on the sill beam and higher than the second main body, the second extension extending obliquely in a bottom-to-top direction.

[0006] In the above technical solution, by providing a first sealing surface for supporting the first sealing layer and a second sealing surface for supporting the second sealing layer at the front and rear ends of the center floor assembly, and by using sealant for both the first and second sealing layers, the fluidity of the sealant can effectively fill the assembly gaps of the chassis, improving the chassis's sealing effect. Furthermore, the first sealing surface includes a first main body extending in the left-right direction and a first extension. The first extension is located on the sill beam and connected to the left and right ends of the first main body. The first extension extends obliquely from bottom to top, increasing the sealing length and sealing area between the center floor assembly and other components, thereby enhancing the chassis's sealing effect. The second sealing surface includes a second main body extending in the left-right direction... The second extension is located on the sill longitudinal beam and connected to the left and right ends of the second main body. The second extension extends obliquely from bottom to top, which can increase the sealing length and sealing area between the middle floor assembly and other components, thereby enhancing the sealing effect of the chassis. Since both the first and second extensions extend obliquely from bottom to top, the process difficulty of applying sealant to the first and second extensions can be reduced. It can also reduce the unevenness caused by the sealant flowing downward under its own gravity, which is conducive to improving the uniformity of the sealant applied to the first and second extensions. It can better and more evenly fill the assembly gap, further enhancing the sealing effect, thereby improving the sealing quality of the chassis.

[0007] In some embodiments, the angle between the first extension and the horizontal plane ranges from 15° to 45°.

[0008] In the above technical solution, by setting the angle between the first extension and the horizontal plane within the range of 15° to 45°, the difficulty of applying sealant to the first extension is reduced, the sealant applied to the first extension is more uniform, and thus the sealing effect is better; and the structural strength of the sill beam can better meet the requirements.

[0009] In some embodiments, the angle between the second extension and the horizontal plane ranges from 15° to 45°.

[0010] In the above technical solution, by setting the angle between the second extension and the horizontal plane within the range of 15° to 45°, the difficulty of applying sealant to the second extension is reduced, the sealant applied to the second extension is more uniform, and thus the sealing effect is better; and the structural strength of the sill beam can better meet the requirements.

[0011] In some embodiments, the first extension is located on the rear side of the first body portion, and the first extension extends backward at an angle from bottom to top.

[0012] In the above technical solution, the first extension is located on the rear side of the first main body, and the first extension extends backward at an angle from bottom to top. The length of the first extension is increased in the front-rear direction, which can reduce the difficulty of applying sealant to the first extension and increase the sealing area between the middle floor assembly and other components, thereby further enhancing the sealing effect.

[0013] In some embodiments, the second extension is located on the front side of the second body portion, and the second extension extends forward at an angle from bottom to top.

[0014] In the above technical solution, the second extension is located on the front side of the second main body, and the second extension extends forward at an angle from bottom to top. The length of the second extension is increased in the front-back direction, which can reduce the difficulty of applying sealant to the first extension and increase the sealing length and sealing area between the middle floor assembly and other components, thereby further enhancing the sealing effect.

[0015] In some embodiments, the angle between the first main body and the horizontal plane is less than 10°.

[0016] In the above technical solution, by setting the angle between the first main body and the horizontal plane to less than 10°, the process difficulty of applying sealant to the first main body can be reduced, and the sealant applied to the first main body can be more uniform.

[0017] In some embodiments, the angle between the second main body and the horizontal plane is less than 10°.

[0018] In the above technical solution, by setting the angle between the second main body and the horizontal plane to less than 10°, the process difficulty of applying sealant to the second main body can be reduced, and the sealant applied to the second main body can be more uniform.

[0019] In some embodiments, the front end of the middle floor assembly has a first connecting surface located behind the first sealing surface.

[0020] In the above technical solution, by setting the first connecting surface of the front end of the middle floor assembly behind the first sealing surface, the first connecting surface can be located outside the first sealing surface, thereby avoiding water leakage in the passenger compartment caused by the presence of a hole structure in the first connecting surface.

[0021] In some embodiments, the rear end of the middle floor assembly has a second connection surface located in front of the second sealing surface.

[0022] In the above technical solution, by setting the second connecting surface at the front end of the middle floor assembly on the rear side of the second sealing surface, the second connecting surface can be located on the outside of the second sealing surface, thereby avoiding water leakage problems in the passenger compartment caused by the presence of holes in the second connecting surface.

[0023] In some embodiments, the first sealing surface is higher than the first connecting surface.

[0024] In the above technical solution, by making the first sealing surface higher than the first connecting surface, the height of the first sealing surface can be made higher. In this way, even if there is water or other liquids at the mating position between the middle floor assembly and the front engine compartment assembly, the water or other liquids can flow downward and outward from the sealing position to the connecting position under their own gravity. This can reduce the liquid stagnating at the sealing position, thereby further reducing the probability of water leakage.

[0025] In some embodiments, the second sealing surface is higher than the second connecting surface.

[0026] In the above technical solution, by making the second sealing surface higher than the second connecting surface, the height of the second sealing surface can be made higher. In this way, even if there is water or other liquids at the mating position between the middle floor assembly and the front engine compartment assembly, the water or other liquids can flow downward and outward from the sealing position to the connecting position under their own gravity. This can reduce the liquid stagnating at the sealing position, thereby further reducing the probability of water leakage.

[0027] In some embodiments, the thickness of the first sealing layer and / or the second sealing layer is greater than 3 mm.

[0028] In the above technical solution, by setting the thickness of the first sealing layer and / or the second sealing layer to be greater than 3mm, the thickness of the first sealing layer and / or the second sealing layer can be larger. The larger thickness of the first sealing layer and / or the second sealing layer can compensate for the assembly error between the components, so that the first sealing layer and / or the second sealing layer can better fill the assembly gap, thereby improving the sealing effect.

[0029] In some embodiments, the sealant is a self-drying sealant.

[0030] In the above technical solution, self-drying sealant is used to seal the assembly gaps of the chassis. Self-drying sealant does not require additional heating and curing treatment, which simplifies the construction process, reduces construction costs, and avoids adverse effects on chassis components caused by heating the sealant.

[0031] In some embodiments, the sealant is a semi-curing sealant.

[0032] In the above technical solution, a semi-curing sealant is used to seal the assembly gap of the chassis. After the sealant is applied, it is semi-solid. Compared with a fully curing sealant, the adhesion between the floor assembly and other components is relatively small, which can reduce the difficulty of disassembling the floor assembly and other components.

[0033] Secondly, this utility model proposes a chassis, comprising: a middle floor assembly, which is the middle floor assembly of the first aspect embodiment described above; a front engine compartment assembly, the rear end of which has a third sealing surface, and a first sealing layer is provided between the third sealing surface and the first sealing surface; and a rear floor assembly, the front end of which has a fourth sealing surface, and a second sealing layer is provided between the fourth sealing surface and the second sealing surface.

[0034] In the above technical solution, by setting the middle floor assembly of the first aspect embodiment, a first sealing surface for supporting the first sealing layer and a second sealing surface for supporting the second sealing layer are respectively provided at the front and rear ends of the middle floor assembly. Both the first and second sealing layers are made of sealant. Utilizing the fluidity of the sealant, the assembly gaps of the chassis can be filled effectively, improving the chassis's sealing effect. Furthermore, the first sealing surface is configured to include a first main body extending in the left-right direction and a first extension. The first extension is located on the sill beam and connected to the left and right ends of the first main body. The first extension extends obliquely from bottom to top, increasing the sealing length and sealing area between the middle floor assembly and other components, thereby enhancing the chassis's sealing effect. The second sealing surface is configured to include a first main body extending in the left-right direction and a first extension. The second main body and the second extension are provided. The second extension is located on the sill beam and connected to the left and right ends of the second main body. The second extension extends obliquely from bottom to top, which can increase the sealing length and sealing area between the floor assembly and other components, thereby enhancing the sealing effect of the chassis. Since both the first extension and the second extension extend obliquely from bottom to top, the process difficulty of applying sealant to the first extension and the second extension can be reduced. It can also reduce the unevenness caused by the sealant flowing downward under its own gravity on the first extension and the second extension, which is conducive to improving the uniformity of the sealant applied to the first extension and the second extension. It can better and more evenly fill the assembly gap, further enhancing the sealing effect, thereby improving the sealing quality of the chassis.

[0035] In some embodiments, the middle floor assembly includes a battery device mounted on the middle floor, the middle floor assembly is detachably connected to the front nacelle assembly, and the middle floor assembly is detachably connected to the rear floor assembly.

[0036] In the above technical solution, the battery unit is integrated into the middle floor, which facilitates the installation of the battery unit. The middle floor assembly is detachably connected to the front engine compartment assembly. When the chassis malfunctions or chassis parts need to be replaced, the front engine compartment assembly and the rear floor assembly can be removed from the middle floor assembly, which reduces maintenance costs and improves maintenance efficiency.

[0037] Thirdly, this utility model proposes a vehicle, comprising: a chassis as described in the second aspect embodiment above; and a vehicle body disposed on the chassis.

[0038] In the above technical solution, the vehicle, by setting the chassis of the second aspect embodiment, has a first sealing surface for supporting the first sealing layer and a second sealing surface for supporting the second sealing layer respectively provided at the front and rear ends of the floor assembly. Both the first and second sealing layers are made of sealant. Utilizing the fluidity of the sealant, the assembly gaps of the chassis can be filled effectively, improving the chassis's sealing effect. Furthermore, the first sealing surface is configured to include a first main body extending in the left-right direction and a first extension. The first extension is located on the sill beam and connected to the left and right ends of the first main body. The first extension extends obliquely from bottom to top, increasing the sealing length and sealing area between the floor assembly and other components, thereby enhancing the chassis's sealing effect. The second sealing surface is configured to include a first main body extending in the left-right direction... The extended second main body and the second extension, the second extension is located on the sill longitudinal beam and connected to the left and right ends of the second main body. The second extension extends obliquely from bottom to top, which can increase the sealing length and sealing area between the middle floor assembly and other components, thereby enhancing the sealing effect of the chassis. Since both the first extension and the second extension extend obliquely from bottom to top, the process difficulty of applying sealant to the first extension and the second extension can be reduced. It can also reduce the unevenness caused by the sealant flowing downward under its own gravity on the first extension and the second extension, which is conducive to improving the uniformity of the sealant applied to the first extension and the second extension. It can better and more evenly fill the assembly gap, further enhancing the sealing effect, thereby improving the sealing quality of the chassis.

[0039] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0040] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0041] Figure 1 This is a partial structural diagram of the chassis according to some embodiments of the present utility model;

[0042] Figure 2 This is a flowchart of the chassis assembly process according to some embodiments of the present utility model;

[0043] Figure 3 yes Figure 2 A top view of the chassis;

[0044] Figure 4 It is along Figure 3 Cross-sectional view of line AA in the middle;

[0045] Figure 5 It is along Figure 3 Cross-sectional view of the middle BB line;

[0046] Figure 6 yes Figure 1 Exploded view of the chassis;

[0047] Figure 7 yes Figure 1 A schematic diagram showing the application of sealant to the floor assembly in the middle section;

[0048] Figure 8 yes Figure 7 A partial schematic diagram of the front end of the middle floor assembly;

[0049] Figure 9 yes Figure 7 A partial schematic diagram of the rear end of the middle floor assembly;

[0050] Figure 10 yes Figure 1 A partial structural diagram of the floor assembly in the middle section;

[0051] Figure 11 yes Figure 10 A partial schematic diagram of the front end of the middle floor assembly;

[0052] Figure 12 yes Figure 10 A partial schematic diagram of the rear end of the middle floor assembly;

[0053] Figure 13 yes Figure 1 A partial structural diagram of the forward engine compartment assembly;

[0054] Figure 14 yes Figure 1 A partial structural diagram of the rear floor assembly;

[0055] Figure 15 This is a schematic diagram of a vehicle according to some embodiments of the present invention.

[0056] Figure label:

[0057] 1000, vehicles;

[0058] 100. Chassis;

[0059] 20. Forward engine compartment assembly; 21. Third sealing surface; 22. Third connecting surface; 23. Third connecting hole;

[0060] 30. Middle floor assembly; 31. Middle floor; 32. First sealing surface; 321. First main body; 322. First extension; 33. Second sealing surface; 331. Second main body; 332. Second extension; 34. First connecting surface; 35. First connecting hole; 36. Second connecting surface; 37. Second connecting hole; 38. Threshold beam;

[0061] 40. Rear floor assembly; 41. Fourth sealing surface; 42. Fourth connecting surface; 43. Fourth connecting hole;

[0062] 50. First sealing layer; 51. Second sealing layer;

[0063] 60. First fastener; 61. First bolt; 62. First nut; 63. Second fastener; 64. Second bolt; 65. Second nut;

[0064] 200. Vehicle body. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0066] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order or hierarchy.

[0067] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments.

[0068] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "attachment," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0069] In this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0070] In the embodiments of this utility model, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this utility model shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this utility model.

[0071] In this utility model, "multiple" refers to two or more (including two).

[0072] The chassis is an important component of a vehicle. It is usually assembled from multiple parts, and the assembly gaps of the chassis need to be sealed to improve its waterproofness.

[0073] In related technologies, some chassis sealing solutions use sealing strips or sealing foam mating surfaces for sealing. However, a seal cannot be achieved solely by pressing the sealing strip together; it requires the use of sealant to supplement the seal. This sealing method, which combines sealing strips or sealing foam with sealant, has poor sealing performance and is prone to water leakage. Therefore, improving the sealing quality of the chassis is a technical problem that needs to be solved.

[0074] Based on this, this utility model embodiment proposes a middle floor assembly, including: a middle floor and a sill beam, the sill beam being disposed at the left and right ends of the middle floor and extending in the front-back direction; the front end of the middle floor assembly has a first sealing surface for bearing a first sealing layer, the first sealing layer being sealant, the first sealing surface facing upward and including a first main body and a first extension, the first main body being disposed on the middle floor and extending in the left-right direction, the first extension being disposed on the sill beam and higher than the first main body, the first extension extending obliquely in the upward direction; the rear end of the middle floor assembly has a second sealing surface for bearing a second sealing layer, the second sealing layer being sealant, the second sealing surface facing upward and including a second main body and a second extension, the second main body being disposed on the middle floor and extending in the left-right direction, the second extension being disposed on the sill beam and higher than the second main body, the second extension extending obliquely in the upward direction.

[0075] In the above technical solution, by providing a first sealing surface for supporting the first sealing layer and a second sealing surface for supporting the second sealing layer at the front and rear ends of the center floor assembly, and by using sealant for both the first and second sealing layers, the fluidity of the sealant can effectively fill the assembly gaps of the chassis, improving the chassis's sealing effect. Furthermore, the first sealing surface includes a first main body extending in the left-right direction and a first extension. The first extension is located on the sill beam and connected to the left and right ends of the first main body. The first extension extends obliquely from bottom to top, increasing the sealing length and sealing area between the center floor assembly and other components, thereby enhancing the chassis's sealing effect. The second sealing surface includes a second main body extending in the left-right direction... The second extension is located on the sill longitudinal beam and connected to the left and right ends of the second main body. The second extension extends obliquely from bottom to top, which can increase the sealing length and sealing area between the middle floor assembly and other components, thereby enhancing the sealing effect of the chassis. Since both the first and second extensions extend obliquely from bottom to top, the process difficulty of applying sealant to the first and second extensions can be reduced. It can also reduce the unevenness caused by the sealant flowing downward under its own gravity, which is conducive to improving the uniformity of the sealant applied to the first and second extensions. It can better and more evenly fill the assembly gap, further enhancing the sealing effect, thereby improving the sealing quality of the chassis.

[0076] The vehicles disclosed in this utility model embodiment can be fuel vehicles, natural gas vehicles, new energy vehicles or rail vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles or range-extended vehicles, etc.

[0077] The floor assembly 30 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0078] Reference Figures 1-5In a first aspect, this utility model proposes a middle floor assembly 30, comprising: a middle floor 31 and a threshold beam 38, wherein the threshold beam 38 is disposed at the left and right ends of the middle floor 31 and extends in the front-rear direction; the front end of the middle floor assembly 30 has a first sealing surface 32 for supporting a first sealing layer 50, the first sealing layer 50 being a sealant, the first sealing surface 32 facing upward and including a first main body portion 321 and a first extension portion 322, the first main body portion 321 being disposed on the middle floor 31 and extending in the left-right direction, and the first extension portion 322 being disposed on the threshold beam. The second extension 322 extends obliquely from bottom to top and is higher than the first main body 321. The rear end of the middle floor assembly 30 has a second sealing surface 33 for supporting the second sealing layer 51. The second sealing layer 51 is a sealant. The second sealing surface 33 faces upward and includes the second main body 331 and the second extension 332. The second main body 331 is disposed on the middle floor 31 and extends in the left-right direction. The second extension 332 is disposed on the sill beam 38 and is higher than the second main body 331. The second extension 332 extends obliquely from bottom to top.

[0079] The middle floor assembly 30 has a first sealing surface 32 at its front end and a second sealing surface 33 at its rear end.

[0080] Sealant is a sealing material that deforms to conform to the shape of the sealing surface, does not easily flow, and has a certain degree of adhesion. Sealant provides functions such as leak prevention, waterproofing, vibration damping, sound insulation, and heat insulation. Due to its fluidity, sealant, compared to solid sealing materials such as sealing strips and sealing foam, can better fill gaps in structural features. Furthermore, sealant eliminates the need for cutting and is easy to process, reducing the complexity of the sealing process.

[0081] In the above technical solution, by providing a first sealing surface 32 for supporting the first sealing layer 50 and a second sealing surface 33 for supporting the second sealing layer 51 at the front and rear ends of the middle floor assembly 30, and by using sealant for both the first sealing layer 50 and the second sealing layer 51, the fluidity of the sealant can effectively fill the assembly gaps of the chassis 100, thereby improving the sealing effect of the chassis 100. Furthermore, the first sealing surface 32 is configured to include a first main body portion 321 extending in the left-right direction and a first extension portion 322. The first extension portion 322 is located on the sill beam 38 and connected to the left and right ends of the first main body portion 321. The first extension portion 322 extends obliquely from bottom to top, which increases the sealing length and sealing area between the middle floor assembly 30 and other components, thereby enhancing the sealing effect of the chassis 100. The second sealing surface 33 is configured to include a second main body portion 331 extending in the left-right direction. The second extension 332 is located on the sill beam 38 and connected to the left and right ends of the second main body 331. The second extension 332 extends obliquely from bottom to top, increasing the sealing length and area between the floor assembly 30 and other components, thereby enhancing the sealing effect of the chassis 100. Since both the first extension 322 and the second extension 332 extend obliquely from bottom to top, the process difficulty of applying sealant to the first extension 322 and the second extension 332 is reduced. This also reduces the unevenness caused by the sealant flowing downwards under its own weight, improving the uniformity of the sealant applied to the first extension 322 and the second extension 332. This allows for better and more even filling of assembly gaps, further enhancing the sealing effect and improving the sealing quality of the chassis 100. (Refer to...) Figure 8 In some embodiments, the angle between the first extension 322 and the horizontal plane ranges from 15° to 45°.

[0082] For example, the angle α1 between the first extension 322 and the horizontal plane can be 15°, 20°, 25°, 30°, 35°, 40°, 45°, etc.

[0083] When applying sealant to the first extension 322, if the angle between the first extension 322 and the horizontal plane is too large, the sealant will easily flow downward along the first extension 322, resulting in uneven sealant application on the first extension 322. For example, this may result in insufficient sealant in the upper part of the first extension 322, leading to poor sealing performance. By ensuring that the angle between the first extension 322 and the horizontal plane is no greater than 45°, the sealant applied to the first extension 322 can be made more uniform. For example, the amount of sealant in the upper part of the first extension 322 can meet the sealing requirements.

[0084] If the angle between the first extension 322 and the horizontal plane is too small, the first extension 322 will be too long. When processing the threshold beam 38 to form the first extension 322, the amount of material removed from the threshold beam 38 during processing will increase, resulting in a decrease in the structural strength of the threshold beam 38. By ensuring that the angle between the first extension 322 and the horizontal plane is not less than 15°, the structural strength of the threshold beam 38 can meet the requirements.

[0085] In the above technical solution, by setting the angle between the first extension 322 and the horizontal plane within the range of 15° to 45°, the difficulty of applying sealant to the first extension 322 is reduced, the sealant applied to the first extension 322 is more uniform, and thus the sealing effect is better; and the structural strength of the sill beam 38 can better meet the requirements.

[0086] Reference Figure 9 In some embodiments, the angle between the second extension 332 and the horizontal plane ranges from 15° to 45°.

[0087] For example, the angle α1 between the second extension 332 and the horizontal plane can be 15°, 20°, 25°, 30°, 35°, 40°, 45°, etc.

[0088] When applying sealant to the second extension 332, if the angle between the second extension 332 and the horizontal plane is too large, the sealant will easily flow downward along the second extension 332, resulting in uneven sealant application. For example, this may lead to insufficient sealant in the upper part of the second extension 332, resulting in poor sealing performance. By ensuring that the angle between the second extension 332 and the horizontal plane is no greater than 45°, the sealant applied to the second extension 332 can be made more uniform. For example, the amount of sealant in the upper part of the second extension 332 can meet the sealing requirements.

[0089] If the angle between the second extension 332 and the horizontal plane is too small, the second extension 332 will be too long. When processing the threshold beam 38 to form the second extension 332, the amount of material removed from the threshold beam 38 during processing will increase, resulting in a decrease in the structural strength of the threshold beam 38. By ensuring that the angle between the second extension 332 and the horizontal plane is not less than 15°, the structural strength of the threshold beam 38 can meet the requirements.

[0090] In the above technical solution, by setting the angle between the second extension 332 and the horizontal plane within the range of 15° to 45°, the difficulty of applying sealant to the second extension 332 is reduced, the sealant applied to the second extension 332 is more uniform, and thus the sealing effect is better; and the structural strength of the sill beam 38 can better meet the requirements.

[0091] In some embodiments, the first extension 322 is located on the rear side of the first main body 321, and the first extension 322 extends backward at an angle from bottom to top.

[0092] In the above technical solution, the first extension 322 is located on the rear side of the first main body 321, and the first extension 322 extends backward at an angle from bottom to top. The length of the first extension 322 is increased in the front-back direction, which can reduce the difficulty of applying sealant to the first extension 322, and can also increase the sealing length and sealing area between the middle floor assembly 30 and other components, further enhancing the sealing effect.

[0093] In some embodiments, the second extension 332 is located on the front side of the second main body 331, and the second extension 332 extends forward at an angle from bottom to top.

[0094] In the above technical solution, the second extension 332 is located on the front side of the second main body 331, and the second extension 332 extends forward at an angle from bottom to top. The length of the second extension 332 is increased in the front-back direction, which can reduce the difficulty of applying sealant to the second extension 332, and can also increase the sealing length and sealing area between the middle floor assembly 30 and other components, further enhancing the sealing effect.

[0095] In some embodiments, the angle between the first main body portion 321 and the horizontal plane is less than 10°.

[0096] For example, the angle between the first main body 321 and the horizontal plane can be 0°, 2°, 4°, 6°, 8°, etc.

[0097] When applying sealant to the first main body 321, if the angle between the first main body 321 and the horizontal plane is too large, the sealant will easily flow downwards along the first main body 321, resulting in uneven sealant application. For example, this may result in insufficient sealant in the upper part of the first main body 321, leading to poor sealing performance. By ensuring that the angle between the first main body 321 and the horizontal plane is no greater than 10°, the sealant applied to the first main body 321 can be made more uniform. For example, the amount of sealant in the upper part of the first main body 321 can meet the sealing requirements.

[0098] In the above technical solution, by setting the angle between the first main body 321 and the horizontal plane to less than 10°, the process difficulty of applying sealant to the first main body 321 can be reduced, and the sealant applied to the first main body 321 can be more uniform.

[0099] In some embodiments, the angle between the second main body portion 331 and the horizontal plane is less than 10°.

[0100] For example, the angle between the second main body 331 and the horizontal plane can be 0°, 2°, 4°, 6°, 8°, etc.

[0101] When applying sealant to the second main body 331, if the angle between the second main body 331 and the horizontal plane is too large, the sealant will easily flow downwards along the second main body 331, resulting in uneven sealant application. For example, this may lead to insufficient sealant in the upper part of the second main body 331, resulting in poor sealing performance. By ensuring that the angle between the second main body 331 and the horizontal plane is no greater than 10°, the sealant applied to the second main body 331 can be made more uniform. For example, the amount of sealant in the upper part of the second main body 331 can meet the sealing requirements.

[0102] In the above technical solution, by setting the angle between the second main body 331 and the horizontal plane to less than 10°, the process difficulty of applying sealant to the second main body 331 can be reduced, and the sealant applied to the second main body 331 can be more uniform.

[0103] In some embodiments, the front end of the middle floor assembly 30 has a first connecting surface 34, which is located behind the first sealing surface 32.

[0104] For example, when the first connecting surface 34 is connected to other components by means of riveting, bolting, or other connection methods, a hole structure will be provided on the first connecting surface 34. If the first connecting surface 34 is located behind the first sealing surface 32, that is, if the first connecting surface 34 is located inside the first sealing surface 32, external liquids such as water may seep into the passenger compartment through the gaps in the hole structure on the first connecting surface 34, causing water leakage in the passenger compartment. By placing the first connecting surface 34 in front of the first sealing surface 32, that is, if the first connecting surface 34 is located outside the first sealing surface 32, the first connecting surface 34 can be avoided from being located at the bottom of the passenger compartment, thereby avoiding the water leakage problem in the passenger compartment caused by the hole structure of the first connecting surface 34.

[0105] In the above technical solution, by setting the first connecting surface 34 at the front end of the middle floor assembly 30 on the rear side of the first sealing surface 32, the first connecting surface 34 can be located on the outside of the first sealing surface 32, thereby avoiding the water leakage problem in the passenger compartment caused by the presence of a hole structure in the first connecting surface 34.

[0106] For example, when the second connecting surface 36 is connected to other components by means of riveting, bolting, or other connection methods, a hole structure will be provided on the second connecting surface 36. If the second connecting surface 36 is located on the front side of the second sealing surface 33, that is, if the second connecting surface 36 is located on the inner side of the second sealing surface 33, it is possible that external liquids such as water may seep into the passenger compartment through the gaps in the hole structure on the second connecting surface 36, causing water leakage in the passenger compartment. By placing the second connecting surface 36 on the rear side of the second sealing surface 33, that is, if the second connecting surface 36 is located on the outer side of the second sealing surface 33, the second connecting surface 36 can be avoided from being located at the bottom of the passenger compartment, thereby avoiding the water leakage problem in the passenger compartment caused by the hole structure on the second connecting surface 36.

[0107] In some embodiments, the rear end of the middle floor assembly 30 has a second connection surface 36, which is located in front of the second sealing surface 33.

[0108] In the above technical solution, by setting the second connecting surface 36 at the front end of the middle floor assembly 30 on the rear side of the second sealing surface 33, the second connecting surface 36 can be located on the outside of the second sealing surface 33, thereby avoiding the water leakage problem in the passenger compartment caused by the hole structure of the second connecting surface 36.

[0109] In some embodiments, refer to Figure 4 The first sealing surface 32 is higher than the first connecting surface 34.

[0110] In the above technical solution, by making the first sealing surface 32 higher than the first connecting surface 34, the height of the first sealing surface 32 can be made higher. In this way, even if there is water or other liquid at the mating position between the middle floor assembly 30 and the front engine compartment assembly 20, the water or other liquid can flow downward and outward from the sealing position to the connecting position under its own gravity. This can reduce the liquid stagnating at the sealing position, thereby further reducing the probability of water leakage.

[0111] In some embodiments, refer to Figure 5 The second sealing surface 33 is higher than the second connecting surface 36.

[0112] In the above technical solution, by making the second sealing surface 33 higher than the second connecting surface 36, the height of the second sealing surface 33 can be higher. In this way, even if there is water or other liquid at the mating position between the middle floor assembly 30 and the front engine compartment assembly 20, the water or other liquid can flow downward and outward from the sealing position to the connecting position under its own gravity. This can reduce the liquid stagnating at the sealing position, thereby further reducing the probability of water leakage.

[0113] Reference Figures 4-5In some embodiments, the thickness of the first sealing layer 50 and / or the second sealing layer 51 is greater than 3 mm.

[0114] For example, the thickness d1 of the first sealing layer 50 is greater than 3 mm; for example, the thickness d2 of the second sealing layer 51 is greater than 3 mm. For example, the thickness of both the first sealing layer 50 and the second sealing layer 51 is greater than 3 mm. For example, the thickness of the sealing layer can be 3.2 mm, 3.4 mm, 3.5 mm, 3.8 mm, 4.0 mm, 4.2 mm, 4.4 mm, 4.5 mm, 4.8 mm, etc.

[0115] In the above technical solution, by setting the thickness of the first sealing layer 50 and / or the second sealing layer 51 to be greater than 3mm, the thickness of the first sealing layer 50 and / or the second sealing layer 51 can be larger. The larger thickness of the first sealing layer 50 and / or the second sealing layer 51 can compensate for the assembly error between the components, so that the first sealing layer 50 and / or the second sealing layer 51 can better fill the assembly gap, thereby improving the sealing effect.

[0116] In some embodiments, the sealant is a self-drying sealant.

[0117] Self-drying sealants can dry and cure on their own after being applied to the surface of the medium, without the need for additional auxiliary means such as heating or light exposure.

[0118] For example, the application temperature of the sealant is below 40℃. Application temperatures can include 38℃, 35℃, 32℃, 30℃, 28℃, 26℃, 24℃, 22℃, and 20℃. The application temperature range of the sealant falls within the range achievable by indoor ambient temperatures, eliminating the need for additional heating or other treatments. This simplifies the application process, reduces costs, and avoids adverse effects on chassis components caused by heating the sealant.

[0119] In the above technical solution, by using self-drying sealant to seal the assembly gap of chassis 100, the self-drying sealant does not require additional heating and curing treatment, which simplifies the construction process, reduces construction costs, and avoids adverse effects on the components on chassis 100 caused by heating the sealant.

[0120] In some embodiments, the sealant is a semi-curing sealant.

[0121] In the above technical solution, a semi-curing sealant is used to seal the assembly gap of the chassis 100. After the sealant is applied, it is semi-solid. Compared with a fully curing sealant, the adhesion between the middle floor assembly 30 and other components is relatively small, which can reduce the difficulty of disassembling the middle floor assembly 30 and other components.

[0122] Secondly, this utility model proposes a chassis 100, including: a middle floor assembly 30, wherein the middle floor assembly 30 is the middle floor assembly 30 of the first aspect embodiment above; the rear end of the front engine compartment assembly 20 has a third sealing surface 21, and a first sealing layer 50 is provided between the third sealing surface 21 and the first sealing surface 32; the front end of the rear floor assembly 40 has a fourth sealing surface 41, and a second sealing layer 51 is provided between the fourth sealing surface 41 and the second sealing surface 33.

[0123] The middle floor assembly 30 has a first sealing surface 32 at its front end and a second sealing surface 33 at its rear end. The first sealing surface 32 at the front end of the middle floor assembly 30 is sealed to the third sealing surface 21 at the rear end of the front nacelle assembly 20 through a first sealing layer 50, and the second sealing surface 33 at the rear end of the middle floor assembly 30 is sealed to the fourth sealing surface 41 at the front end of the rear floor assembly 40 through a second sealing layer 51.

[0124] For example, refer to Figure 2 The assembly process of chassis 100 may include:

[0125] They are assembled to form the front nacelle assembly 20, the middle floor assembly 30, and the rear floor assembly 40, respectively.

[0126] The front nacelle assembly 20 and the rear floor assembly 40 are respectively connected to the front and rear ends of the middle floor assembly 30, and the assembly gap between the front nacelle assembly 20 and the middle floor assembly 30 and the assembly gap between the rear floor assembly 40 and the middle floor assembly 30 are sealed with sealant.

[0127] Assemble to form the forward engine compartment assembly 20, for example by welding together multiple components of the forward engine compartment assembly 20 to assemble the forward engine compartment assembly 20.

[0128] The intermediate floor assembly 30 is assembled by welding multiple components of the intermediate floor assembly 30 together to form the intermediate floor assembly 30.

[0129] The rear floor assembly 40 is assembled by welding multiple components of the rear floor assembly 40 together to form the rear floor assembly 40.

[0130] Specifically, connecting the front nacelle assembly 20 and the rear floor assembly 40 to the front and rear ends of the middle floor assembly 30 respectively involves connecting the rear end of the front nacelle assembly 20 to the front end of the middle floor assembly 30, and connecting the front end of the rear floor assembly 40 to the rear end of the middle floor assembly 30.

[0131] For example, the rear end of the forward nacelle assembly 20 can be connected to the front end of the middle floor assembly 30 simultaneously, and the front end of the rear floor assembly 40 can be connected to the rear end of the middle floor assembly 30; or the rear end of the forward nacelle assembly 20 can be connected to the front end of the middle floor assembly 30 first, and then the front end of the rear floor assembly 40 can be connected to the rear end of the middle floor assembly 30; or the front end of the rear floor assembly 40 can be connected to the rear end of the middle floor assembly 30 first, and then the rear end of the forward nacelle assembly 20 can be connected to the front end of the middle floor assembly 30.

[0132] The front nacelle assembly 20 is connected to the front end of the middle floor assembly 30, and the assembly gap between the front nacelle assembly 20 and the middle floor assembly 30 is sealed with sealant; the rear floor assembly 40 is connected to the rear end of the middle floor assembly 30, and the assembly gap between the rear floor assembly 40 and the middle floor assembly 30 is sealed with sealant.

[0133] In addition, during the assembly of the vehicle, the assembled chassis 100 can be assembled with the body 200.

[0134] For example, refer to Figure 2 The front nacelle assembly 20 and the rear floor assembly 40 are respectively connected to the front and rear ends of the middle floor assembly 30, and the assembly gaps between the front nacelle assembly 20 and the middle floor assembly 30 and the rear floor assembly 40 and the middle floor assembly 30 are sealed with sealant, including:

[0135] Apply sealant to both the front and rear ends of the middle floor assembly 30;

[0136] The rear end of the front nacelle assembly 20 and the front end of the rear floor assembly 40 are pressed against the sealant at the front and rear ends of the middle floor assembly 30, respectively.

[0137] The front nacelle assembly 20 and the rear floor assembly 40 are respectively connected to the front and rear ends of the middle floor assembly 30.

[0138] The sealant can be applied by spraying, rolling, pressure coating, or manual application. After the sealant is applied to both ends of the middle floor assembly 30, the rear end of the front engine compartment assembly 20 presses against the sealant at the front end of the middle floor assembly 30, and the front end of the rear floor assembly 40 presses against the sealant at the rear end of the middle floor assembly 30. Then, the front end of the front engine compartment assembly 20 is connected to the front end of the middle floor assembly 30, and the rear end of the rear floor assembly 40 is connected to the rear end of the middle floor assembly 30. This connection can be achieved through riveting, bolting, or compression fitting.

[0139] By first applying sealant to the front and rear ends of the middle floor assembly 30, then pressing the rear end of the front engine compartment assembly 20 and the front end of the rear floor assembly 40 against the sealant on the front and rear ends of the middle floor assembly 30, and then connecting the front engine compartment assembly 20 and the rear floor assembly 40 to the front and rear ends of the middle floor assembly 30 respectively, this assembly process allows the sealant to be applied to the front and rear ends of the middle floor assembly 30 before the front engine compartment assembly 20 and the rear floor assembly 40 are connected to the front and rear ends of the middle floor assembly 30. This facilitates the application of sealant, and by placing the connection step after the sealant application process, the assembly force between the components during the connection process can be used to compress the sealant. Compared to the process of connecting first and then filling with sealant, the sealant can be accommodated in the assembly gap in an interference fit, which is beneficial to further improve the sealing quality of the chassis 100.

[0140] In the above technical solution, by providing a first sealing surface 32 for supporting the first sealing layer 50 and a second sealing surface 33 for supporting the second sealing layer 51 at the front and rear ends of the middle floor assembly 30, and by using sealant for both the first sealing layer 50 and the second sealing layer 51, the fluidity of the sealant can effectively fill the assembly gaps of the chassis 100, thereby improving the sealing effect of the chassis 100. Furthermore, the first sealing surface 32 is configured to include a first main body portion 321 extending in the left-right direction and a first extension portion 322. The first extension portion 322 is located on the sill beam 38 and connected to the left and right ends of the first main body portion 321. The first extension portion 322 extends obliquely from bottom to top, which increases the sealing length and sealing area between the middle floor assembly 30 and other components, thereby enhancing the sealing effect of the chassis 100. The second sealing surface 33 is configured to include a second main body portion 331 extending in the left-right direction. The second extension 332 is located on the sill beam 38 and connected to the left and right ends of the second main body 331. The second extension 332 extends obliquely from bottom to top, which can increase the sealing length and sealing area between the middle floor assembly 30 and other components, thereby enhancing the sealing effect of the chassis 100. Since both the first extension 322 and the second extension 332 extend obliquely from bottom to top, the process difficulty of applying sealant to the first extension 322 and the second extension 332 can be reduced. The unevenness caused by the sealant on the first extension 322 and the second extension 332 flowing downward under its own gravity can be reduced. This is conducive to improving the uniformity of the sealant applied to the first extension 322 and the second extension 332, and can better and more evenly fill the assembly gap, further enhancing the sealing effect, thereby improving the sealing quality of the chassis 100.

[0141] For example, the front and rear ends of the middle floor assembly 30 have a first connecting surface 34 and a second connecting surface 36, respectively. The first connecting surface 34 and the first sealing surface 32 are both located at the front end of the middle floor assembly 30, with the first connecting surface 34 located behind the first sealing surface 32. The second connecting surface 36 and the second sealing surface 33 are both located at the rear end of the middle floor assembly 30, with the second connecting surface 36 located in front of the second sealing surface 33. The rear end of the front nacelle assembly 20 has a third connecting surface 22, and the front end of the rear floor assembly 40 has a fourth connecting surface 42. The third connecting surface 22 is connected to the first connecting surface 34, and the fourth connecting surface 42 is connected to the second connecting surface 36.

[0142] Specifically, the first sealing surface 32 and the third sealing surface 21 are sealed together by the first sealing layer 50, and the second sealing surface 33 and the fourth sealing surface 41 are sealed together by the second sealing layer 51. The third connecting surface 22 and the first connecting surface 34 can be connected by welding, riveting, bolting, compression fitting, or other similar methods. The fourth connecting surface 42 and the second connecting surface 36 can also be connected by welding, riveting, bolting, compression fitting, or other similar methods.

[0143] For example, the third connecting surface 22 is connected to the first connecting surface 34 by a first fastener 60. The first connecting surface 34 is provided with a first connecting hole 35, and the third connecting surface 22 is provided with a third connecting hole 23. The first fastener 60 passes through the first connecting hole 35 and the third connecting hole 23 and is locked onto the front floor assembly and the middle floor assembly 30.

[0144] The first fastener 60 may include a first bolt 61 and a first nut 62 that are threaded together. The first bolt 61 passes through the first connecting hole 35 and the third connecting hole 23. The first nut 62 is threadedly connected to the first bolt 61 and is located below the middle floor assembly 30 and abuts against the bottom surface of the middle floor assembly 30. Connecting the third connecting surface 22 and the first connecting surface 34 through the first fastener 60 makes the connection between the front engine compartment assembly 20 and the middle floor assembly 30 more reliable. Furthermore, the tightening force of the first fastener 60 can press the third sealing surface 21 of the front engine compartment assembly 20 against the first sealing layer 50, improving the sealing effect.

[0145] For example, the fourth connecting surface 42 and the second connecting surface 36 are connected by a second fastener 63. The fourth connecting surface 42 is provided with a fourth connecting hole 43, and the second connecting surface 36 is provided with a second connecting hole 37. The second fastener 63 passes through the second connecting hole 37 and the fourth connecting hole 43 and is locked onto the rear floor assembly 40 and the middle floor assembly 30.

[0146] The second fastener 63 may include a second bolt 64 and a second nut 65 that are threaded together. The second bolt 64 passes through the second connecting hole 37 and the fourth connecting hole 43. The second nut 65 is threadedly connected to the second bolt 64 and is located below the middle floor assembly 30 and abuts against the bottom surface of the middle floor assembly 30. Connecting the fourth connecting surface 42 and the second connecting surface 36 through the second fastener 63 makes the connection between the rear floor assembly 40 and the middle floor assembly 30 more reliable. Furthermore, the tightening force of the second fastener 63 can press the fourth sealing surface 41 of the rear floor assembly 40 against the second sealing layer 51, improving the sealing effect.

[0147] In some embodiments, the middle floor assembly 30 includes a battery device mounted on the middle floor 31, the middle floor assembly 30 is detachably connected to the front nacelle assembly 20, and the middle floor assembly 30 is detachably connected to the rear floor assembly 40.

[0148] The battery unit can power the vehicle 1000.

[0149] In the above technical solution, the battery device is integrated on the middle floor 31, which facilitates the installation of the battery device. The middle floor assembly 30 is detachably connected to the front engine compartment assembly 20. When the chassis 100 malfunctions or chassis 100 parts need to be replaced, the front engine compartment assembly 20 and the rear floor assembly 40 can be removed from the middle floor assembly 30, which reduces maintenance costs and improves maintenance efficiency.

[0150] Reference Figure 15 Thirdly, this utility model proposes a vehicle 1000, including: a chassis as described in the second aspect embodiment above; and a body 200 disposed on the chassis 100.

[0151] In the above technical solution, the vehicle 1000 is equipped with a chassis 100 as described in the second aspect embodiment. In this solution, a first sealing surface 32 for supporting the first sealing layer 50 and a second sealing surface 33 for supporting the second sealing layer 51 are respectively provided at the front and rear ends of the floor assembly 30. Both the first sealing layer 50 and the second sealing layer 51 are made of sealant. The fluidity of the sealant effectively fills the assembly gaps of the chassis 100, improving the sealing effect of the chassis 100. Furthermore, the first sealing surface 32 is configured to include a first main body 321 extending in the left-right direction and a first extension 322. The first extension 322 is located on the sill beam 38 and connected to the left and right ends of the first main body 321. The first extension 322 extends obliquely from bottom to top, increasing the sealing length and sealing area between the floor assembly 30 and other components, thereby enhancing the sealing effect of the chassis 100. The second sealing surface 33 is configured as… The chassis 100 includes a second main body 331 extending in the left-right direction and a second extension 332. The second extension 332 is located on the sill beam 38 and connected to the left and right ends of the second main body 331. The second extension 332 extends obliquely from bottom to top, which can increase the sealing length and sealing area between the middle floor assembly 30 and other components, thereby enhancing the sealing effect of the chassis 100. Since both the first extension 322 and the second extension 332 extend obliquely from bottom to top, the process difficulty of applying sealant to the first extension 322 and the second extension 332 can be reduced. This can also reduce the unevenness caused by the sealant on the first extension 322 and the second extension 332 flowing downward under its own gravity, which is conducive to improving the uniformity of the sealant applied to the first extension 322 and the second extension 332. This allows for better and more uniform filling of the assembly gap, further enhancing the sealing effect and thus improving the sealing quality of the chassis 100.

[0152] The following reference Figures 1-6 The present invention describes a chassis 100 according to some embodiments of the present invention and the assembly process of the chassis 100.

[0153] In this embodiment, the chassis 100 includes a middle floor assembly 30, a front engine compartment assembly 20, and a rear floor assembly 40. The middle floor assembly 30 has a first sealing surface 32 at its front end and a second sealing surface 33 at its rear end. The first sealing surface 32 at the front end of the middle floor assembly 30 is sealed to the third sealing surface 21 at the rear end of the front engine compartment assembly 20 via a first sealing layer 50. The second sealing surface 33 at the rear end of the middle floor assembly 30 is sealed to the fourth sealing surface 41 at the front end of the rear floor assembly 40 via a second sealing layer 51. The middle floor assembly 30 has a first connecting surface 34 and a second connecting surface 36 at its front and rear ends, respectively. The front engine compartment assembly 20 has a third connecting surface 22 at its rear end, and the rear floor assembly 40 has a fourth connecting surface 42 at its front end. The third connecting surface 22 is connected to the first connecting surface 34 via a first fastener 60, and the fourth connecting surface 42 is connected to the second connecting surface 36 via a second fastener 63.

[0154] The assembly process of the chassis 100 in this embodiment may include the following steps: assembling the front engine compartment assembly 20, the middle floor assembly 30, and the rear floor assembly 40 respectively; applying sealant to the first sealing surface 32 at the front end of the middle floor assembly 30 and the second sealing surface 33 at the rear end of the middle floor assembly 30; pressing the third sealing surface 21 at the rear end of the front engine compartment assembly 20 against the sealant on the first sealing surface 32 at the front end of the middle floor assembly 30; pressing the fourth sealing surface 41 at the front end of the rear floor assembly 40 against the sealant on the second sealing surface 33 at the rear end of the middle floor assembly 30; finally connecting the first connecting surface 34 at the front end of the middle floor assembly 30 to the third connecting surface 22 at the rear end of the front engine compartment assembly 20 using a first fastener 60; and connecting the second connecting surface 36 at the rear end of the middle floor assembly 30 to the fourth connecting surface 42 at the front end of the rear floor assembly 40 using a second fastener 63, thus assembling the chassis 100. The sealant located between the first sealing surface 32 and the third sealing surface 21 constitutes the first sealing layer 50, and the sealant located between the second sealing surface 33 and the fourth sealing surface 41 constitutes the second sealing layer 51.

[0155] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0156] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A floor assembly, characterized in that, The application relates to a middle floor assembly and a vehicle body. The middle floor assembly comprises: a middle floor and a threshold longitudinal beam arranged at the left and right ends of the middle floor, the threshold longitudinal beam extending in the front-rear direction; a front end of the middle floor assembly is provided with a first sealing surface for carrying a first sealing layer, the first sealing layer being sealing glue, the first sealing surface facing upward and comprising a first main body part and a first extension part, the first main body part being arranged on the middle floor and extending in the left-right direction, the first extension part being arranged on the threshold longitudinal beam and being higher than the first main body part, the first extension part extending in a downward-to-upward direction; 2. The mid-floor assembly of claim 1, wherein, a rear end of the middle floor assembly is provided with a second sealing surface for carrying a second sealing layer, the second sealing layer being sealing glue, the second sealing surface facing upward and comprising a second main body part and a second extension part, the second main body part being arranged on the middle floor and extending in the left-right direction, the second extension part being arranged on the threshold longitudinal beam and being higher than the second main body part, the second extension part extending in a downward-to-upward direction.

3. The mid-floor assembly of claim 1, wherein, An included angle between the first extension part and a horizontal plane ranges from 15 DEG to 45 DEG; and / or, an included angle between the second extension part and a horizontal plane ranges from 15 DEG to 45 DEG.

4. The mid-floor assembly of claim 1, wherein, The first extension part is located at the rear side of the first main body part, and the first extension part extends in a downward-to-upward direction and rearward; and / or, the second extension part is located at the front side of the second main body part, and the second extension part extends in a downward-to-upward direction and forward.

5. The mid-floor assembly of claim 1, wherein, An included angle between the first main body part and a horizontal plane is less than 10 DEG; and / or, an included angle between the second main body part and a horizontal plane is less than 10 DEG. A front end of the middle floor assembly is provided with a first connecting surface located at the rear side of the first sealing surface; 6. The mid-floor assembly of claim 5, wherein, A rear end of the middle floor assembly is provided with a second connecting surface located at the front side of the second sealing surface.

7. The raised floor assembly of claim 1, wherein, The first sealing surface is higher than the first connecting surface; and / or, the second sealing surface is higher than the second connecting surface.

8. The raised floor assembly of any of claims 1-7, wherein, The thickness of the first sealing layer and / or the second sealing layer is greater than 3 mm.

9. A chassis characterized by, The sealing glue is self-drying sealing glue or semi-cured sealing glue. The application relates to a middle floor assembly and a vehicle body. The middle floor assembly comprises: a middle floor and a threshold longitudinal beam arranged at the left and right ends of the middle floor, the threshold longitudinal beam extending in the front-rear direction; 10. The base pan of claim 9, wherein, a front end of the middle floor assembly is provided with a first sealing surface for carrying a first sealing layer, the first sealing layer being sealing glue, the first sealing surface facing upward and comprising a first main body part and a first extension part, the first main body part being arranged on the middle floor and extending in the left-right direction, the first extension part being arranged on the threshold longitudinal beam and being higher than the first main body part, the first extension part extending in a downward-to-upward direction; 11. A vehicle characterized by comprising: a rear end of the middle floor assembly is provided with a second sealing surface for carrying a second sealing layer, the second sealing layer being sealing glue, the second sealing surface facing upward and comprising a second main body part and a second extension part, the second main body part being arranged on the middle floor and extending in the left-right direction, the second extension part being arranged on the threshold longitudinal beam and being higher than the second main body part, the second extension part extending in a downward-to-upward direction. An included angle between the first extension part and a horizontal plane ranges from 15 DEG to 45 DEG; and / or, an included angle between the second extension part and a horizontal plane ranges from 15 DEG to 45 DEG. The first extension part is located at the rear side of the first main body part, and the first extension part extends in a downward-to-upward direction and rearward; and / or, the second extension part is located at the front side of the second main body part, and the second extension part extends in a downward-to-upward direction and forward. An included angle between the first main body part and a horizontal plane is less than 10 DEG; and / or, an included angle between the second main body part and a horizontal plane is less than 10 DEG. A front end of the middle floor assembly is provided with a first connecting surface located at the rear side of the first sealing surface; A rear end of the middle floor assembly is provided with a second connecting surface located at the front side of the second sealing surface. The first sealing surface is higher than the first connecting surface; and / or, the second sealing surface is higher than the second connecting surface. The thickness of the first sealing layer and / or the second sealing layer is greater than 3 mm. The sealing glue is self-drying sealing glue or semi-cured sealing glue. The application relates to a middle floor assembly and a vehicle body. The middle floor assembly comprises: a middle floor and a threshold longitudinal beam arranged at the left and right ends of the middle floor, the threshold longitudinal beam extending in the front-rear direction; a front end of the middle floor assembly is provided with a first sealing surface for carrying a first sealing layer, the first sealing layer being sealing glue, the first sealing surface facing upward and comprising a first main body part and a first extension part, the first main body part being arranged on the middle floor and extending in the left-right direction, the first extension part being arranged on the threshold longitudinal beam and being higher than the first main body part, the first extension part extending in a downward-to-upward direction; a rear end of the middle floor assembly is provided with a second sealing surface for carrying a second sealing layer, the second sealing layer being sealing glue, the second sealing surface facing upward and comprising a second main body part and a second extension part, the second main body part being arranged on the middle floor and extending in the left-right direction, the second extension part being arranged on the threshold longitudinal beam and being higher than the second main body part, the second extension part extending in a downward-to-upward direction. An included angle between the first extension part and a horizontal plane ranges from 15 DEG to 45 DEG; and / or, an included angle between the second extension part and a horizontal plane ranges from 15 DEG to 45 DEG. The first extension part is located at the rear side of the first main body part, and the first extension part extends in a downward-to-upward direction and rearward; and / or, the second extension part is located at the front side of the second main body part, and the second extension part extends in a downward-to-upward direction and forward. An included angle between the first main body part and a horizontal plane is less than 10 DEG; and / or, an included angle between the second main body part and a horizontal plane is less than 10 DEG. A front end of the middle floor assembly is provided with a first connecting surface located at the rear side of the first sealing surface; A rear end of the middle floor assembly is provided with a second connecting surface located at the front side of the second sealing surface. The first sealing surface is higher than the first connecting surface; and / or, the second sealing surface is higher than the second connecting surface. The thickness of the first sealing layer and / or the second sealing layer is greater than 3 mm. The sealing glue is self-drying sealing glue or semi-cured sealing glue. The application relates to a middle floor assembly and a vehicle body. The middle floor assembly comprises: a middle floor and a threshold longitudinal beam arranged at the left and right ends of the middle floor, the threshold longitudinal beam extending in the front-rear direction; a front end of the middle floor assembly is provided with a first sealing surface for carrying a first sealing layer, the first sealing layer being sealing glue, the first sealing surface facing upward and comprising a first main body part and a first extension part, the first main body part being arranged on the middle floor and extending in the left-right direction, the first extension part being arranged on the threshold longitudinal beam and being higher than the first main body part, the first extension part extending in a downward-to-upward direction; a rear end of the middle floor assembly is provided with a second sealing surface for carrying a second sealing layer, the second sealing layer being sealing glue, the second sealing surface facing upward and comprising a second main body part and a second extension part, the second main body part being arranged on the middle floor and extending in the left-right direction, the second extension part being arranged on the threshold longitudinal beam and being higher than the second main body part, the second extension part extending in a downward-to-upward direction. An included angle between the first extension part and a horizontal plane ranges from 15 DEG to 45 DEG; and / or, an included angle between the second extension part and a horizontal plane ranges from 15 DEG to 45 DEG. The first extension part is located at the rear side of the first main body part, and the first extension part extends in a downward-to-upward direction and rearward; and / or, the second extension part is located at the front side of the second main body part, and the second extension part extends in a downward-to-upward direction and forward. An included angle between the first main body part and a horizontal plane is less than 10 DEG; and / or, an included angle between the second main body part and a horizontal plane is less than 10 DEG. A front end of the middle floor assembly is provided with a first connecting surface located at the rear

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