Front floor structure and vehicle

Abstract

The invention provides a front floor structure and a vehicle. The front floor structure comprises a front floor panel, a central channel, a front seat cross beam, a rear seat cross beam and a threshold beam. The central channel is arranged in the middle of the front floor panel and extends in the length direction of the automobile body. The front seat cross beam and the rear seat cross beam extend in the width direction of a vehicle body. The doorsill beams are arranged on the left side and the right side of the front floor panel and extend in the length direction of a vehicle body. And the front floor panel, the central channel, the front seat cross beam, the rear seat cross beam and the doorsill beam are integrally formed by adopting a vacuum centrifugal casting process. Connection points between parts in the front floor structure are omitted through the integrally-formed structure, the integration degree between the parts is high, complexity and production cost of a whole vehicle are reduced, and production efficiency is high.

Description

Technical Field

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

[0002] The existing front floor structure usually adopts the structural form of a crossbeam, a central channel and a threshold beam. Some models will also be designed with longitudinal beam connections to enable the installation of components such as seats, CNSL, and battery packs, while meeting the safety requirements of the vehicle such as side collisions.

[0003] However, with the changes in market demand, new configurations such as second-row long slides and zero-gravity seats are becoming increasingly popular, resulting in an increasing number of components in the front floor structure, an increasingly complex overall structure, and a low degree of integration between parts, which increases the complexity and production cost of the entire vehicle.

[0004] Therefore, it is necessary to design a front floor structure and a vehicle that can solve the above-mentioned technical problems. Summary of the invention

[0005] The present application provides a front floor structure and a vehicle, which reduce the number of parts and have high production efficiency.

[0006] According to the first aspect of the embodiment of this specification, a front floor structure is provided, including a front floor panel, a central channel, a front seat cross beam, a rear seat cross beam and a door sill beam; the central channel is arranged in the middle position of the front floor panel and extends along the length direction of the vehicle body; the front seat cross beam and the rear seat cross beam extend along the width direction of the vehicle body; the door sill beam is arranged on the left and right sides of the front floor panel and extends along the length direction of the vehicle body; the front floor panel, the central channel, the front seat cross beam, the rear seat cross beam and the door sill beam are integrally formed by a vacuum centrifugal casting process.

[0007] Furthermore, the main body of the front floor structure is a thin-walled structure; the thin-walled structure simultaneously forms the front floor panel, the central channel, the front seat cross beam, the rear seat cross beam and the door sill beam; the thin-walled structure forms at least one cavity on the central channel, the front seat cross beam, the rear seat cross beam and the door sill beam respectively.

[0008] Furthermore, the front floor panel, the central channel, the front seat cross beam, the rear seat cross beam and the door sill beam are made of steel; the vacuum centrifugal casting process uses a sand core as a mold and adopts vacuum adsorption technology while centrifugal casting.

[0009] Furthermore, the central channel includes a channel outer wall and a channel inner wall, and both sides of the channel outer wall are connected to the front floor panel; the channel outer wall, the channel inner wall and the front floor panel together form a double-layer cavity.

[0010] Furthermore, the double-layer cavity includes a first cavity and a second cavity located on the upper layer and a third cavity located on the lower layer; the first cavity and the second cavity are formed by the outer wall of the channel and the inner wall of the channel; the third cavity is formed by the outer wall of the channel, the inner wall of the channel and the front floor panel.

[0011] Furthermore, the double-layer cavity, the first cavity, the second cavity and the third cavity are all closed structures in the circumferential direction; the double-layer cavity, the first cavity, the second cavity and the third cavity are all trapezoidal.

[0012] Furthermore, a recessed portion is formed between the first cavity and the second cavity, and the recessed portion is formed by the middle portion of the outer wall of the channel being depressed until it merges with the inner wall of the channel; channel reinforcement ribs extending downward from the outer wall of the channel are provided in the first cavity and the second cavity; the channel reinforcement ribs are perpendicular to the inner wall of the channel and are spaced a certain distance apart.

[0013] Furthermore, the rear seat cross beam includes two raised mounting platforms and a horizontal connecting wall located between the two mounting platforms, and the two mounting platforms and the horizontal connecting wall are formed by a continuous thin wall; the bottoms of the two mounting platforms are arranged flush with the horizontal connecting wall.

[0014] Furthermore, a downwardly extending and locally thickened mounting point is formed on the top of the two mounting platforms, and a through hole is provided on the mounting point; the two mounting platforms are arranged in a trapezoidal shape, and the two mounting platforms and the horizontal connecting wall together form an inverted trapezoidal structure; the material thickness of at least one of the mounting platforms at the top is greater than the material thickness on both sides thereof.

[0015] Furthermore, a plurality of cavities are formed on the door sill beam, and the plurality of cavities include an upper cavity and a lower cavity. A front sealing plate for closing the upper cavity is formed on the door sill beam.

[0016] Furthermore, a first threshold reinforcement rib is integrally formed in the threshold beam, the first threshold reinforcement rib is connected to the side wall of the threshold beam and has the same extension direction as the side wall, and the length of the first threshold reinforcement rib is smaller than the length of the side wall.

[0017] Furthermore, a second threshold reinforcement rib is integrally formed in the threshold beam, the second threshold reinforcement rib is vertically arranged with the first threshold reinforcement rib, the first threshold reinforcement rib and the second threshold reinforcement rib are arranged in a criss-cross shape; the first threshold reinforcement rib and the second threshold reinforcement rib are arranged close to the front seat crossbeam and / or the rear seat crossbeam.

[0018] Furthermore, a threshold beam mounting point is provided on the threshold beam, and the threshold beam mounting point is provided on a local thickening structure integrally formed with the threshold beam; the threshold beam mounting point is a mounting hole formed by processing on the local thickening structure.

[0019] Furthermore, a side pedal mounting portion is integrally formed on the sill beam, and the side pedal mounting portion is recessed inwardly relative to one side of the sill beam. The side pedal mounting portion includes a horizontal mounting plate higher than the bottom wall of the sill beam, an inner plate perpendicular to and connected to the horizontal mounting plate, and a front vertical plate and a rear vertical plate arranged on the front and rear sides of the inner plate; the front vertical plate and the rear vertical plate close the front and rear sides of the side pedal mounting portion.

[0020] Furthermore, the horizontal mounting plate is provided with a pedal mounting hole, the inner plate is provided with a reinforcing rib protruding into the inner side of the threshold beam; the side pedal mounting portion is provided with a locally thickened area relative to the threshold beam; and the inner plate is provided with an avoidance groove.

[0021] Furthermore, the central channel intersects with the front seat cross beam and the rear seat cross beam; the top wall structure of the central channel, the front seat cross beam and the rear seat cross beam at the intersection is the same.

[0022] According to a second aspect of an embodiment of the present specification, a vehicle is provided, comprising the front floor structure described in the first aspect above.

[0023] The present application has the following beneficial effects: the connection points between the parts in the front floor structure are eliminated through the one-piece molding structure, so that the integration between the parts is higher, the complexity and production cost of the whole vehicle are reduced, and the production efficiency is high.

[0024] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0026] Figure 1 is a three-dimensional diagram of the floor structure before this application; Figure 2 It is a three-dimensional diagram of the floor structure from another perspective before this application; Figure 3 is a cross-sectional view of the junction of the central channel and the front floor panel of the present application; Figure 4 is a cross-sectional view of the connection between the rear seat crossbeam and the front floor panel of the present application; Figure 5is a three-dimensional diagram of the threshold beam of the present application; Figure 6 is a schematic diagram of the upper cavity sealed by the front sealing plate of the present application; Figure 7 is a cross-sectional view of the threshold beam of the present application; Figure 8 It is a partial schematic diagram of the side pedal installation portion of the present application; Fig. 9 It is a schematic diagram of the installation point of the threshold beam of the present application on the threshold beam; Fig.10 It is a schematic diagram of the mounting points on the rear seat crossbar of this application; Fig.11 It is a three-dimensional diagram of a pedal assembly assembled on a threshold beam of the present application.

[0027] Description of reference numerals: 10-Front floor panel; 20-central channel; 21-channel outer wall; 22-channel inner wall; 23-double-layer cavity; 231-first cavity; 232-second cavity; 233-third cavity; 24-recessed portion; 25-channel reinforcing rib; 30-Front seat crossbar; 40-rear seat crossbeam; 41, 42-mounting platform; 411-mounting point; 412-through hole; 43-horizontal connecting wall; 50-sill beam; 51-cavity; 501-side wall; 502-first sill reinforcement rib; 503-second sill reinforcement rib; 511-upper cavity; 512-lower cavity; 52-front cover plate; 53-sill beam mounting point; 54-side pedal mounting portion; 541-horizontal mounting plate; 542-inner side plate; 543-front vertical plate; 544-rear vertical plate; 545-pedal mounting hole; 546-reinforcement rib; 547 avoidance groove; 60- pedal assembly; 61- pedal; 62- mounting frame; 63- driving member. DETAILED DESCRIPTION

[0028] Here, the technical solutions in the embodiments (or "implementation methods") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0029] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0030] Next, the embodiments of this specification are described in detail.

[0031] Reference Figure 1 As shown, the present application discloses a front floor structure, which includes a front floor panel 10, a central channel 20, a front seat cross beam 30, a rear seat cross beam 40 and a door sill beam 50. The central channel 20 is arranged in the middle of the front floor panel 10 and extends along the length direction of the vehicle body, the front seat cross beam 30 and the rear seat cross beam 40 extend along the width direction of the vehicle body and are arranged at intervals, and the door sill beam 50 is arranged on the left and right sides of the front floor panel 10 and extends along the length direction of the vehicle body.

[0032] The front floor panel 10, the central channel 20, the front seat cross beam 30, the rear seat cross beam 40 and the threshold beam 50 are integrally formed by a vacuum centrifugal casting process. According to one embodiment of the present application, the material of the front floor panel 10, the central channel 20, the front seat cross beam 30, the rear seat cross beam 40 and the threshold beam 50 is steel. The vacuum centrifugal casting process uses a sand core as a mold, and uses vacuum adsorption technology during centrifugal casting to remove air and impurities in the sand core mold to ensure the density and strength of the front floor structure.

[0033] The main body of the front floor structure is a thin-walled structure. The thin-walled structure simultaneously forms the front floor panel 10, the central channel 20, the front seat cross beam 30, the rear seat cross beam 40 and the threshold beam 50. The thin-walled structure forms at least one cavity on the central channel 20, the front seat cross beam 30, the rear seat cross beam 40 and the threshold beam 50 respectively.

[0034] Please continue to refer to Figure 2 and Figure 3 As shown, the central channel 20 intersects with the front seat cross beam 30 and the rear seat cross beam 40. The top wall structure of the central channel 20, the front seat cross beam 30 and the rear seat cross beam 40 at the intersection is the same, thereby simplifying the manufacturing process of the sand core mold. At the same time, the front seat cross beam 30, the rear seat cross beam 40 and the central channel 20 are connected as a whole, which can effectively transmit the side collision force and improve the side collision performance.

[0035] The central channel 20 includes a channel outer wall 21 and a channel inner wall 22, and the channel outer wall 21 and the channel inner wall 22 are thin-walled structures. The channel outer wall 21 is integrally connected to the front floor panel 10 through horizontal flanges on the left and right sides. The channel inner wall 22 is integrally connected to the channel outer wall 21.

[0036] The channel outer wall 21, the channel inner wall 22 and the front floor panel 10 together form a double-layer cavity 23, thereby improving the collision performance of the central channel 20 and the stiffness and mode of the central channel 20 area. At the same time, the seat installation point stiffness on the central channel 20 and the body bending and torsional stiffness can also be greatly improved.

[0037] The double-layer cavity 23 includes a first cavity 231 located on the upper layer, a second cavity 232 located on the lower layer, and a third cavity 233 located on the lower layer. The bending parts of the first cavity 231, the second cavity 232, and the third cavity 233 are all arc transitions, and the width of the third cavity 233 is greater than the sum of the widths of the first cavity 231 and the second cavity 232.

[0038] The first cavity 231 and the second cavity 232 are formed by the channel outer wall 21 and the channel inner wall 22. The third cavity 233 is formed by the channel outer wall 21, the channel inner wall 22 and the front floor panel 10. The double-layer cavity 23, the first cavity 231, the second cavity 232 and the third cavity 233 are all closed structures in the circumferential direction. The double-layer cavity 23, the first cavity 231, the second cavity 232 and the third cavity 233 are all trapezoidal.

[0039] A recessed portion 24 is formed between the first cavity 231 and the second cavity 232. The recessed portion 24 is formed by the middle of the channel outer wall 21 being recessed until it merges with the channel inner wall 22. Channel reinforcing ribs 25 extending downward from the channel outer wall 21 are provided in the first cavity 231 and the second cavity 232. The channel reinforcing ribs 25 are perpendicular to the channel inner wall 22 and spaced a certain distance apart. The channel reinforcing ribs 25 make the structures of the first cavity 231 and the second cavity 232 more stable, and prevent the central channel 20 from being deformed or damaged.

[0040] Please continue to refer to Figure 4 As shown, the rear seat cross beam 40 includes two raised mounting platforms 41, 42 and a horizontal connecting wall 43 located between the two mounting platforms 41, 42. The two mounting platforms 41, 42 and the horizontal connecting wall 43 are formed by a continuous thin wall. The bottoms of the two mounting platforms 41, 42 are arranged flush with the horizontal connecting wall 43, thereby increasing the contact area between the rear seat cross beam 40 and the front floor panel 10, and improving the connection stability between the rear seat cross beam 40 and the front floor panel 10.

[0041] The two mounting platforms 41, 42 include a mounting platform 41 at the front side and a mounting platform 42 at the rear side. The height of the mounting platform 41 at the front side is greater than that of the mounting platform 42 at the rear side in the vertical direction, the material thickness of the mounting platform 41 at the front side is greater than that of the mounting platform 42 at the rear side, and the material thickness of the top of the mounting platform 41 is greater than that of the two sides thereof. When the top is subjected to external loads or pressure, the thicker structure at the top can more effectively disperse and withstand these forces, thereby improving the stability and durability of the mounting platform 41. In the present application, the mounting platform 41 at the front side is used to cooperate with the front seat crossbeam 30 to fix the front row of seats, and the mounting platform 42 at the rear side is used to fix the sliding rail seats of the second row of the vehicle.

[0042] The tops of the two mounting platforms 41 and 42 are formed with mounting points 411 extending downward and partially thickened, and the mounting points 411 are provided with through holes 412, which are formed into threaded holes by tapping, so as to facilitate the installation of components. Through the local thickening design, the bearing capacity of the mounting points 411 is improved, and it can withstand greater pressure or load, especially in applications that need to withstand heavy objects or high stress for a long time, which can effectively reduce the risk of damage or fatigue failure.

[0043] The two mounting platforms 41 and 42 are both arranged in a trapezoidal shape. The two mounting platforms 41 and 42 and the horizontal connecting wall 43 together form an inverted trapezoidal structure. The minimum draft angle a of the inverted trapezoidal structure can be 0.5°-1.5°.

[0044] Please continue to refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, a plurality of cavities 51, a front sealing plate 52, a sill beam mounting point 53 and a side pedal mounting portion 54 are formed on the sill beam 50. The plurality of cavities 51 include an upper cavity 511 and a lower cavity 512. The front sealing plate 52 seals the upper cavity 511 of the sill beam 50, thereby ensuring the sealing of the upper cavity 511 and improving the wading performance and NVH (noise, vibration and harshness) performance.

[0045] A first threshold reinforcement rib 502 and a second threshold reinforcement rib 503 are integrally formed in the threshold beam 50. The first threshold reinforcement rib 502 is connected to the side wall 501 of the threshold beam 50 and extends in the same direction as the side wall 501. The length of the first threshold reinforcement rib 502 is less than the length of the side wall 501. The first threshold reinforcement rib 502 is spaced a certain distance from the front end face or the rear end face of the threshold beam 50.

[0046] In one embodiment of the present application, the second threshold reinforcement rib 503 is arranged perpendicular to the first threshold reinforcement rib 502, and the first threshold reinforcement rib 502 and the second threshold reinforcement rib 503 are arranged in a cross shape. This effectively avoids the concentration of force in a single direction. In particular, when the vehicle body encounters a large-area impact, the cross-arranged first threshold reinforcement rib 502 and the second threshold reinforcement rib 503 can work together to avoid the single reinforcement rib from being damaged due to excessive concentrated force.

[0047] The first threshold reinforcement rib 502 and the second threshold reinforcement rib 503 are arranged in a local area within the cavity 51, thereby meeting different installation and property requirements, thereby achieving lightweight. According to an embodiment of the present application, the first threshold reinforcement rib 502 and the second threshold reinforcement rib 503 are arranged close to the front seat cross beam 30 or the rear seat cross beam 40, thereby more effectively dispersing the impact force when the threshold beam 50 is hit or subjected to external force, reducing deformation or damage of the front seat cross beam 30 or the rear seat cross beam 40, and enhancing the protection of the occupants in the vehicle.

[0048] The threshold beam mounting point 53 is arranged on a local thickened structure integrally formed with the threshold beam 50 . The threshold beam mounting point 53 is a mounting hole formed on the local thickened structure, which reduces the cost and weight of the threshold beam mounting point 53 and improves the dimensional accuracy of the threshold beam mounting point 53 . Fig.10 In the illustrated embodiment, the mounting point 411 at the upper end of the rear seat cross beam 40 is arranged in the vertical direction, wherein the seat is located above the rear seat cross beam 40 .

[0049] The side step mounting portion 54 is integrally formed on the threshold beam 50, and the side step mounting portion 54 is recessed inwardly relative to one side of the threshold beam 50. The recessed setting can avoid sacrificing ground clearance, and the parts mounted on the side step mounting portion 54 will be higher than the bottom surface of the threshold beam 50, which is more beautiful.

[0050] The side step mounting portion 54 includes a horizontal mounting plate 541 higher than the bottom wall of the door sill beam 50, an inner side plate 542 perpendicular to and connected to the horizontal mounting plate 541, and a front vertical plate 543 and a rear vertical plate 544 arranged at the front and rear sides of the inner side plate 542. The front vertical plate 543 and the rear vertical plate 544 seal the front and rear sides of the side step mounting portion 54, strengthen the structural strength of the side step mounting portion 54, and ensure that the door sill beam 50 is not broken during a side collision.

[0051] The horizontal mounting plate 541 is provided with a pedal mounting hole 545, the inner plate 542 is provided with a reinforcing rib 546 protruding into the inner side of the door sill beam 50, and the side pedal mounting portion 54 is provided with a locally thickened area relative to the door sill beam 50. The inner plate 542 is provided with an avoidance groove 547, thereby avoiding interference or collision between the parts mounted on the side pedal mounting portion 54 and the inner plate 542.

[0052] Please continue to refer to Fig.11 As shown, the pedal assembly 60 is assembled to the door sill beam 50, and includes a pedal 61, two mounting brackets 62 and a driving member 63. The mounting bracket 62 is fixed in the side pedal mounting portion 54, and the driving member 63 can drive the pedal 61 to rotate relative to the mounting bracket 62, so that the pedal 61 extends out of the vehicle body or retracts into the vehicle body, thereby improving the convenience of users getting on and off the vehicle.

[0053] In this application, the front floor panel 10 seals the bottom of the vehicle body and provides a support surface for parts such as carpet harnesses. The central channel 20 supports front and center column collisions and provides installation points for SRS (airbags) and CNSL (console, console, instrument panel). The front end can be connected to the front panel and the rear end is connected to the center floor. The front seat crossbeam 30 supports side collisions and side pillars and provides installation points for the front seats.

[0054] The present application eliminates the connection points between the parts in the front floor structure through an integrated molding structure, reduces the number of parts as well as the connection cost and management cost, makes the integration between the parts higher, reduces the complexity and production cost of the whole vehicle, and improves the production efficiency.

[0055] The present application is a vacuum centrifugally cast steel casting, which has higher strength, wear resistance and hardness, and is suitable for bearing larger mechanical loads and impact forces, especially when casting complex molds or molds with narrow cavities, it can ensure complete filling of the cavity and realize the molding of castings with high complexity or thin-walled structures.

[0056] By vacuuming, it is ensured that there is no air or bubbles in the cavity, avoiding the formation of pores or other defects due to the presence of gas during the pouring process. Vacuum adsorption can effectively enhance the fluidity and wettability of the metal stock in the cavity, ensuring that the metal stock can quickly and evenly fill every detail of the cavity, which is particularly suitable for the production of complex-shaped castings and thin-walled structures.

[0057] The centrifugal force helps drive the metal to flow along the wall of the mold, allowing the metal to quickly and evenly fill the entire cavity. Due to the centrifugal force, the casting is usually more compact and the probability of pores and other defects is greatly reduced.

[0058] By combining vacuum adsorption with centrifugal pouring, the metal stock liquid has higher fluidity and stronger filling capacity during the pouring process, and can fill well even in a narrow cavity to form a thin-walled structure. For large or complex cavity castings, it can also ensure fast filling, improve the quality of the castings and improve production efficiency.

[0059] The present application also discloses a vehicle, comprising the above-mentioned front floor structure.

[0060] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A front floor structure, characterized in that: It includes a front floor panel, a central channel, a front seat crossbeam, a rear seat crossbeam and a door sill beam; the central channel is arranged at the middle position of the front floor panel and extends along the length direction of the vehicle body; the front seat crossbeam and the rear seat crossbeam extend along the width direction of the vehicle body; the door sill beam is arranged on the left and right sides of the front floor panel and extends along the length direction of the vehicle body; the front floor panel, the central channel, the front seat crossbeam, the rear seat crossbeam and the door sill beam are integrally formed by a vacuum centrifugal casting process.

2. The front floor structure according to claim 1, characterized in that: The main body of the front floor structure is a thin-walled structure; the thin-walled structure simultaneously forms the front floor panel, the central channel, the front seat cross beam, the rear seat cross beam and the door sill beam; the thin-walled structure forms at least one cavity on the central channel, the front seat cross beam, the rear seat cross beam and the door sill beam respectively.

3. The front floor structure according to claim 1, characterized in that: The front floor panel, the central channel, the front seat cross beam, the rear seat cross beam and the door sill beam are made of steel; the vacuum centrifugal casting process uses a sand core as a mold and adopts vacuum adsorption technology while centrifugal casting.

4. The front floor structure according to claim 1, characterized in that: The central channel includes a channel outer wall and a channel inner wall, and both sides of the channel outer wall are connected to the front floor panel; the channel outer wall, the channel inner wall and the front floor panel together form a double-layer cavity.

5. The front floor structure according to claim 4, characterized in that: The double-layer cavity includes a first cavity and a second cavity located on the upper layer and a third cavity located on the lower layer; the first cavity and the second cavity are formed by the channel outer wall and the channel inner wall; the third cavity is formed by the channel outer wall, the channel inner wall and the front floor panel.

6. The front floor structure according to claim 5, characterized in that: The double-layer cavity, the first cavity, the second cavity and the third cavity are all closed structures in the circumferential direction; the double-layer cavity, the first cavity, the second cavity and the third cavity are all trapezoidal.

7. The front floor structure according to claim 5, characterized in that: A recessed portion is formed between the first cavity and the second cavity, and the recessed portion is formed by the middle portion of the outer wall of the channel being depressed until it merges with the inner wall of the channel; channel reinforcement ribs extending downward from the outer wall of the channel are provided in the first cavity and the second cavity; the channel reinforcement ribs are perpendicular to the inner wall of the channel and are spaced a certain distance apart.

8. The front floor structure according to claim 1, characterized in that: The rear seat cross beam includes two raised mounting platforms and a horizontal connecting wall located between the two mounting platforms, wherein the two mounting platforms and the horizontal connecting wall are formed by a continuous thin wall; the bottoms of the two mounting platforms are flush with the horizontal connecting wall.

9. The front floor structure according to claim 8, characterized in that: The tops of the two mounting platforms are each formed with a mounting point that extends downward and is locally thickened, and a through hole is provided on the mounting point; the two mounting platforms are both arranged in a trapezoidal shape, and the two mounting platforms and the horizontal connecting wall together form an inverted trapezoidal structure; the material thickness of the top of at least one of the mounting platforms is greater than the material thickness on its two sides.

10. The front floor structure according to claim 1, characterized in that: A plurality of cavities are formed on the threshold beam, and the plurality of cavities include an upper cavity and a lower cavity. A front sealing plate for closing the upper cavity is formed on the threshold beam.

11. The front floor structure according to claim 1, characterized in that: A first threshold reinforcement rib is integrally formed in the threshold beam, the first threshold reinforcement rib is connected to the side wall of the threshold beam and extends in the same direction as the side wall, and the length of the first threshold reinforcement rib is smaller than the length of the side wall.

12. The front floor structure according to claim 11, characterized in that: A second threshold reinforcement rib is also integrally formed in the threshold beam, the second threshold reinforcement rib is vertically arranged with the first threshold reinforcement rib, and the first threshold reinforcement rib and the second threshold reinforcement rib are arranged in a criss-cross pattern; the first threshold reinforcement rib and the second threshold reinforcement rib are arranged close to the front seat crossbeam and / or the rear seat crossbeam.

13. The front floor structure according to claim 1, characterized in that: The threshold beam is provided with a threshold beam mounting point, and the threshold beam mounting point is provided on a local thickening structure integrally formed with the threshold beam; the threshold beam mounting point is a mounting hole processed and formed on the local thickening structure.

14. The front floor structure according to claim 1, characterized in that: A side pedal mounting portion is also integrally formed on the threshold beam, and the side pedal mounting portion is recessed inwardly relative to one side of the threshold beam. The side pedal mounting portion includes a horizontal mounting plate that is higher than the bottom wall of the threshold beam, an inner side plate that is perpendicular to and connected to the horizontal mounting plate, and a front vertical plate and a rear vertical plate that are arranged on the front and rear sides of the inner side plate; the front vertical plate and the rear vertical plate close the front and rear sides of the side pedal mounting portion.

15. The front floor structure according to claim 14, characterized in that: The horizontal mounting plate is provided with a pedal mounting hole, the inner plate is provided with a reinforcing rib protruding into the inner side of the threshold beam; the side pedal mounting portion is provided with a locally thickened area relative to the threshold beam; and the inner plate is provided with an avoidance groove.

16. The front floor structure according to claim 1, characterized in that: The central channel intersects with the front seat cross beam and the rear seat cross beam; the top wall structure of the central channel, the front seat cross beam and the rear seat cross beam at the intersection is the same.

17. A vehicle, characterized in that: The front floor structure comprises the front floor structure according to any one of claims 1 to 16.

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