Threshold beam, front floor structure and vehicle

Abstract

The utility model provides a threshold beam, a front floor structure and a vehicle. The doorsill beam is of an integrally-formed structure. The doorsill beam comprises side walls and a plurality of cavities defined by the side walls, the cavities comprise the upper cavities and the lower cavities, and the doorsill beam has different section shapes in the length direction. Connection points between parts in the doorsill beam are omitted through the integrally-formed structure, the integration degree between the parts is high, complexity and production cost of the doorsill beam 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 door sill beam, a front floor structure and a vehicle. Background Art

[0002] The threshold beam supports side impacts, side pillars, and small offset impacts, and provides installation points for battery packs and pedals. However, existing threshold beams are usually hollow structures with multiple ribs forming multiple chambers, including outer chambers and inner chambers, which are formed by welding multiple ribs, resulting in a low degree of integration between parts in the threshold beam, increasing the complexity and production cost of the threshold beam.

[0003] Therefore, it is necessary to design a threshold beam, a front floor structure and a vehicle that solve the above-mentioned technical problems. Utility Model Content

[0004] The present application provides a sill beam, a front floor structure and a vehicle, which reduce the number of parts and have high production efficiency.

[0005] According to a first aspect of an embodiment of the present specification, there is provided a threshold beam, which is an integrally formed structure and includes side walls and a plurality of cavities surrounded by the side walls, wherein the plurality of cavities include an upper cavity and a lower cavity, and the threshold beam has different cross-sectional shapes in the length direction.

[0006] Furthermore, a front sealing plate for closing the upper cavity is integrally formed on the front side of the side wall.

[0007] Furthermore, a local reinforcement area is provided in the cavity, and a threshold reinforcement rib is provided in the local reinforcement area; the local reinforcement area is distributed in the cavity and is spaced apart from the front end face and / or the rear end face of the cavity.

[0008] Further, the threshold reinforcement rib comprises a first threshold reinforcement rib, 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;

[0009] or,

[0010] The threshold reinforcement rib includes a first threshold reinforcement rib and a second threshold reinforcement rib, 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, the second threshold reinforcement rib is arranged perpendicular to the first threshold reinforcement rib, and the first threshold reinforcement rib and the second threshold reinforcement rib are arranged in a crisscross shape.

[0011] Furthermore, a front seat crossbeam contact surface and a rear seat crossbeam contact surface are provided on the door sill beam, and the door sill reinforcement rib is provided close to the front seat crossbeam contact surface or the rear seat crossbeam contact surface.

[0012] Furthermore, there are multiple local reinforcement areas, and the multiple local reinforcement areas are dispersedly arranged on the side wall.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] Furthermore, the side wall is a thin-walled structure, the thickness of the side wall is variable, and a plurality of machined holes are provided on the side wall; a local thickening portion is also integrally formed on the side wall, and the local thickening portion is provided with machined holes.

[0017] Furthermore, the material of the door sill beam is steel.

[0018] According to the second 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 the threshold beam described in the second aspect above; the front floor panel, the central channel, the front seat cross beam and the rear seat cross beam are an integrally formed structure.

[0019] According to a third aspect of an embodiment of the present specification, a vehicle is provided, comprising the front floor structure described in the second aspect above.

[0020] The present application has the following beneficial effects: the connection points between the parts in the threshold beam are eliminated through the one-piece molding structure, so that the integration between the parts is high, the complexity and production cost of the threshold beam are reduced, and the production efficiency is high.

[0021] 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

[0022] 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.

[0023] Figure 1 is a three-dimensional diagram of the threshold beam of the present application;

[0024] Figure 2 is a schematic diagram of the upper cavity sealed by the front sealing plate of the present application;

[0025] Figure 3 is a cross-sectional view of the threshold beam of the present application;

[0026] Figure 4 It is a partial schematic diagram of the side pedal installation portion of the present application;

[0027] Figure 5 It is a schematic diagram of the installation point of the threshold beam of the present application on the threshold beam;

[0028] Figure 6 is a three-dimensional view of a pedal assembly assembled on a threshold beam of the present application;

[0029] Figure 7 is a three-dimensional diagram of the floor structure before this application;

[0030] Figure 8 It is a three-dimensional diagram of the floor structure from another perspective before this application;

[0031] Fig. 9 It is a schematic diagram of the mounting points on the rear seat crossbar of this application;

[0032] Fig.10 is a cross-sectional view of the junction of the central channel and the front floor panel of the present application;

[0033] Fig.11 It is a cross-sectional view of the connection between the rear seat crossbeam and the front floor panel of the present application.

[0034] Description of reference numerals:

[0035] 100-sill beam; 10-side wall; 101-local reinforcement area; 11-first sill reinforcement rib; 12-second sill reinforcement rib; 13-front cover plate; 14-sill beam mounting point; 15-machined hole; 16-local thickening portion; 20-cavity; 21-upper cavity; 22-lower cavity; 201-front end face; 202-rear end face; 30-side pedal mounting portion; 31-horizontal mounting plate; 32-inner side plate; 33-front vertical plate; 34-rear vertical plate; 35-pedal mounting hole; 36-reinforcement rib; 37-avoidance groove;

[0036] 200 - front floor panel;

[0037] 300-central channel; 310-first cavity; 320-second cavity; 330-third cavity; 301-channel outer wall; 302-channel inner wall; 303-recessed portion; 304-channel reinforcing rib;

[0038] 400-Front seat crossbar;

[0039] 500-rear seat crossbeam; 501, 502-installation platform; 511-installation point; 512-through hole; 503-horizontal connecting wall;

[0040] 600- pedal assembly; 610- pedal; 620- mounting frame; 630- driving member. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] Next, the embodiments of this specification are described in detail.

[0044] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the present application discloses a threshold beam 100, which is an integrally formed structure. According to one embodiment of the present application, the threshold beam 100 is integrally formed by a vacuum centrifugal casting process, the material of the threshold beam 100 is steel, the vacuum centrifugal casting process uses a sand core as a mold, and vacuum adsorption technology is used during centrifugal casting to remove air and impurities in the sand core mold to ensure the density and strength of the threshold beam 100.

[0045] The threshold beam 100 includes a side wall 10, a plurality of cavities 20 surrounded by the side wall 10, and a side pedal mounting portion 30. The side wall 10 is a thin-walled structure, and the thickness of the side wall 10 is variable. The plurality of cavities 20 include an upper cavity 21 and a lower cavity 22. In the length direction, the threshold beam 100 has different cross-sectional shapes.

[0046] A front sealing plate 13 for sealing the upper cavity 21 is integrally formed on the front side of the side wall 10 , thereby ensuring the sealing of the upper cavity 21 and improving the wading performance and NVH (noise, vibration and harshness) performance.

[0047] The side wall 10 is provided with a threshold beam mounting point 14. The threshold beam mounting point 14 is provided on a local thickening structure integrally formed with the threshold beam 100. The threshold beam mounting point 14 is a mounting hole formed by processing on the local thickening structure, which reduces the cost and weight of the threshold beam mounting point 14 and improves the dimensional accuracy of the threshold beam mounting point 14. In the present application, the threshold beam mounting point 14 is provided at the bottom of the threshold beam 100 for fixing the battery.

[0048] The side wall 10 is provided with a plurality of machined holes 15. A local thickening portion 16 is also integrally formed on the side wall 10, and the local thickening portion 16 is provided with machined holes 15. Through the design of the local thickening portion 16, the strength and rigidity of the structure can be improved in the local area, thereby enhancing the overall anti-deformation ability of the side wall 10, improving the bearing capacity, and ensuring that the part with greater force has sufficient compressive and tensile strength. The plurality of machined holes 15 are used to fix the door frame, sealing strip or pedal, etc.

[0049] A local reinforcement area 101 is provided in the cavity 20, and a threshold reinforcement rib is provided in the local reinforcement area 101. Since the threshold beam 100 is formed by casting, compared with extrusion, the local reinforcement area 101 can be distributed in the cavity 20 and spaced apart from the front end face 201 or the rear end face 202 of the cavity 20. There are multiple local reinforcement areas 101, and multiple local reinforcement areas 101 are dispersedly arranged on the side wall 10, thereby meeting different installation and property requirements, thereby achieving lightweight.

[0050] The threshold reinforcement rib includes a first threshold reinforcement rib 11, or the threshold reinforcement rib includes a first threshold reinforcement rib 11 and a second threshold reinforcement rib 12. Specifically, the first threshold reinforcement rib 11 and the second threshold reinforcement rib 12 are integrally formed in the cavity 20, the first threshold reinforcement rib 11 is connected to the side wall 10 of the threshold beam 100 and extends in the same direction as the side wall 10, and the length of the first threshold reinforcement rib 11 is less than the length of the side wall 10.

[0051] In one embodiment of the present application, the second threshold reinforcement rib 12 is arranged perpendicular to the first threshold reinforcement rib 11, and the first threshold reinforcement rib 11 and the second threshold reinforcement rib 12 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 11 and the second threshold reinforcement rib 12 can work together to avoid the damage of a single reinforcement rib due to excessive concentrated force.

[0052] The sill beam 100 is provided with a front seat crossbeam contact surface and a rear seat crossbeam contact surface, and the first sill reinforcement rib 11 and the second sill reinforcement rib 12 are arranged close to the front seat crossbeam contact surface or the rear seat crossbeam contact surface. Therefore, when the sill beam 100 is hit or subjected to external force, the impact force can be dispersed more effectively, the deformation or damage of the front seat crossbeam 400 or the rear seat crossbeam 500 can be reduced, and the protection of the occupants in the vehicle can be enhanced.

[0053] The side pedal mounting portion 30 is recessed inwardly relative to one side of the threshold beam 100. The recessed setting can avoid sacrificing ground clearance, and the parts mounted on the side pedal mounting portion 30 will be higher than the bottom surface of the threshold beam 100, which is more beautiful.

[0054] The side step mounting portion 30 includes a horizontal mounting plate 31 higher than the bottom wall of the door sill beam 100, an inner side plate 32 perpendicular to and connected to the horizontal mounting plate 31, and a front vertical plate 33 and a rear vertical plate 34 arranged at the front and rear sides of the inner side plate 32. The front vertical plate 33 and the rear vertical plate 34 close the front and rear sides of the side step mounting portion 30, strengthen the structural strength of the side step mounting portion 30, and ensure that the door sill beam 100 is not broken during a side collision.

[0055] The horizontal mounting plate 31 is provided with a pedal mounting hole 35, the inner plate 32 is provided with a reinforcing rib 36 protruding into the inner side of the door sill beam 100, and the side pedal mounting portion 30 is provided with a locally thickened area relative to the door sill beam 100. The inner plate 32 is provided with an avoidance groove 37, thereby avoiding interference or collision between the parts installed on the side pedal mounting portion 30 and the inner plate 32.

[0056] The present application eliminates the connection points between the parts in the threshold beam 100 through an integrated molding structure, thereby increasing the integration between the parts, reducing the complexity and production cost of the threshold beam 100 , and improving production efficiency.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Reference Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, the present application also discloses a front floor structure, which includes a sill beam 100, a front floor panel 200, a central channel 300, a front seat cross beam 400 and a rear seat cross beam 500. The central channel 300 is arranged at the middle position of the front floor panel 200 and extends along the length direction of the vehicle body, the front seat cross beam 400 and the rear seat cross beam 500 extend along the width direction of the vehicle body and are arranged at intervals, and the sill beam 100 is arranged on the left and right sides of the front floor panel 200 and extends along the length direction of the vehicle body.

[0062] The front floor panel 200, the central channel 300, the front seat cross beam 400, the rear seat cross beam 500 and the threshold beam 100 are an integrally formed structure. According to one embodiment of the present application, vacuum centrifugal casting is used for integrally forming, and the vacuum centrifugal casting process uses a sand core as a mold. During centrifugal casting, vacuum adsorption technology is used to remove air and impurities in the sand core mold to ensure the density and strength of the front floor structure.

[0063] The central channel 300 intersects with the front seat cross beam 400 and the rear seat cross beam 500. The top wall structure of the central channel 300, the front seat cross beam 400 and the rear seat cross beam 500 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 400, the rear seat cross beam 500 and the central channel 300 are connected as a whole, which can effectively transmit the side collision force and improve the side collision performance.

[0064] The central channel 300 includes a channel outer wall 301 and a channel inner wall 302. The channel outer wall 301 and the channel inner wall 302 are thin-walled structures. The channel outer wall 301 is formed integrally with the front floor panel 200 through horizontal flanges on the left and right sides. The channel inner wall 302 is formed integrally with the channel outer wall 301.

[0065] The channel outer wall 301 , the channel inner wall 302 and the front floor panel 200 together form a double-layer cavity, thereby improving the collision performance of the central channel 300 and the stiffness and mode of the central channel 300 area.

[0066] The double-layer cavity includes a first cavity 310 and a second cavity 320 located on the upper layer and a third cavity 330 located on the lower layer. The bending parts of the first cavity 310, the second cavity 320 and the third cavity 330 are all arc transitions, and the size of the third cavity 330 is larger than the sum of the sizes of the first cavity 310 and the second cavity 320.

[0067] The first cavity 310 and the second cavity 320 are formed by the channel outer wall 301 and the channel inner wall 302. The third cavity 330 is formed by the channel outer wall 301, the channel inner wall 302 and the front floor panel 200. The double-layer cavity, the first cavity 310, the second cavity 320 and the third cavity 330 are all closed structures in the circumferential direction. The double-layer cavity, the first cavity 310, the second cavity 320 and the third cavity 330 are all trapezoidal.

[0068] A recessed portion 303 is formed between the first cavity 310 and the second cavity 320. The recessed portion 303 is formed by the middle of the channel outer wall 301 being recessed until it merges with the channel inner wall 302. Channel reinforcing ribs 304 extending downward from the channel outer wall 301 are provided in the first cavity 310 and the second cavity 320. The channel reinforcing ribs 304 are perpendicular to the channel inner wall 302 and spaced a certain distance apart. The channel reinforcing ribs 304 make the structures of the first cavity 310 and the second cavity 320 more stable, avoiding the risk of deformation or damage of the central channel 300.

[0069] The rear seat cross beam 500 includes two raised mounting platforms 501, 502 and a horizontal connecting wall 503 between the two mounting platforms 501, 502. The two mounting platforms 501, 502 and the horizontal connecting wall 503 are formed by a continuous thin wall. The bottoms of the two mounting platforms 501, 502 are flush with the horizontal connecting wall 503, thereby increasing the contact area between the rear seat cross beam 500 and the front floor panel 200 and improving the connection stability between the rear seat cross beam 500 and the front floor panel 200.

[0070] The two mounting platforms 501 , 502 include a mounting platform 501 at the front side and a mounting platform 502 at the rear side. The mounting platform 501 at the front side is taller than the mounting platform 502 at the rear side in the vertical direction.

[0071] The material thickness of the front mounting platform 501 is greater than that of the rear mounting platform 502, and the material thickness of the tops of the two mounting platforms 501 and 502 is greater than the material thickness of the two mounting platforms 501 and 502 on both sides. Therefore, when the top is subjected to external load 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 platforms 501 and 502. In the present application, the front mounting platform 501 is used to cooperate with the front seat crossbeam 400 to fix the front row seats, and the rear mounting platform 502 is used to fix the sliding rail seats of the second row of the vehicle.

[0072] The tops of the two mounting platforms 501 and 502 are each formed with a mounting point 511 extending downward and partially thickened, and a through hole 512 is provided on the mounting point 511, and the through hole 512 is formed into a threaded hole by tapping, thereby facilitating the installation of components. Through the local thickening design, the bearing capacity of the mounting point 511 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.

[0073] The two mounting platforms 501 and 502 are both arranged in a trapezoidal shape. The two mounting platforms 501 and 502 and the horizontal connecting wall 503 together form an inverted trapezoidal structure. The minimum draft angle a of the inverted trapezoidal structure can be 0.5°-1.5°.

[0074] The pedal assembly 600 is assembled to the door sill beam 100. Figure 6 As shown, the pedal assembly 600 includes a pedal 610, two mounting frames 620 and a driving member 630. The mounting frame 620 is fixed in the side pedal mounting portion 30. The driving member 630 can drive the pedal 610 to rotate relative to the mounting frame 620, so that the pedal 610 extends out of the vehicle body or retracts into the vehicle body, thereby improving the convenience for users to get on and off the vehicle.

[0075] In this application, the front floor panel 200 seals the bottom of the vehicle body and provides a support surface for parts such as carpet harnesses. The central channel 300 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 400 supports side collisions and side pillars and provides installation points for the front seats.

[0076] 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.

[0077] The present application also discloses a vehicle, comprising the above-mentioned front floor structure.

[0078] 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 threshold beam, characterized in that: It is an integrally formed structure, which includes a side wall and a plurality of cavities surrounded by the side wall, wherein the plurality of cavities include an upper cavity and a lower cavity, and the threshold beam has different cross-sectional shapes in the length direction.

2. The door sill beam according to claim 1, characterized in that: A front sealing plate that closes the upper cavity is integrally formed on the front side of the side wall.

3. The door sill beam according to claim 1, characterized in that: A local reinforcement area is provided in the cavity, and a threshold reinforcement rib is provided in the local reinforcement area; the local reinforcement area is distributed in the cavity and is spaced apart from the front end face and / or the rear end face of the cavity.

4. The door sill beam according to claim 3, characterized in that: The threshold reinforcement rib comprises a first threshold reinforcement rib, 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; or, The threshold reinforcement rib includes a first threshold reinforcement rib and a second threshold reinforcement rib, 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, the second threshold reinforcement rib is arranged perpendicular to the first threshold reinforcement rib, and the first threshold reinforcement rib and the second threshold reinforcement rib are arranged in a crisscross shape.

5. The door sill beam according to claim 3, characterized in that: The door sill beam is provided with a front seat crossbeam contact surface and a rear seat crossbeam contact surface, and the door sill reinforcement rib is arranged close to the front seat crossbeam contact surface or the rear seat crossbeam contact surface.

6. The door sill beam according to claim 3, characterized in that: There are multiple local reinforcement areas, and the multiple local reinforcement areas are dispersedly arranged on the side wall.

7. The door sill beam 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.

8. The door sill beam 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.

9. The door sill beam according to claim 8, 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.

10. The door sill beam according to claim 1, characterized in that: The side wall is a thin-walled structure, the thickness of the side wall is variable, and a plurality of machined holes are arranged on the side wall; a local thickening portion is also integrally formed on the side wall, and the local thickening portion is provided with machined holes.

11. The door sill beam according to claim 1, characterized in that: The material of the door sill beam is steel.

12. A front floor structure, characterized in that: It comprises a front floor panel, a central channel, a front seat cross beam, a rear seat cross beam and a threshold beam as described in any one of claims 1 to 11; the front floor panel, the central channel, the front seat cross beam and the rear seat cross beam are an integrally formed structure.

13. A vehicle, characterized in that: Comprising the front floor structure as claimed in claim 12.

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