CN220220934U - Vehicle floor beam frame structure and automatic driving vehicle - Google Patents

Abstract

The disclosure provides a vehicle floor beam structure and an automatic driving vehicle, relates to the technical field of vehicles, and particularly relates to the technical field of automatic driving technology and new energy vehicles. The vehicle floor beam structure includes: the middle channel longitudinal beam, the reinforcing framework, the first bracket, the first cross beam, the second cross beam and the third cross beam; the first cross beam, the second cross beam and the third cross beam are arranged along the extending direction of the middle channel longitudinal beam, and are fixedly connected with the middle channel longitudinal beam respectively; the reinforcing framework is arranged between the second beam and the third beam, and the second beam is fixedly connected with the third beam through the reinforcing framework; the middle channel longitudinal beam penetrates through the first cross beam, the middle channel longitudinal beam divides the first cross beam into a first section and a second section, the first section and the second section are fixedly connected with the middle channel longitudinal beam respectively, and the first section is fixedly connected with the second section through a first bracket. The technical scheme can improve the structural strength of the vehicle floor beam frame structure.

Description

Vehicle floor beam frame structure and automatic driving vehicle

Technical Field

The disclosure relates to the technical field of vehicles, in particular to the technical field of automatic driving technology and new energy vehicles, and particularly relates to a vehicle floor beam structure and an automatic driving vehicle.

Background

Along with the establishment of the ' double carbon ' target in China, the automobile is taken as an indispensable travel tool for people's life, gets rid of the dependence on fossil energy, and has the trend of converting energy-saving, emission-reducing and sustainable new energy automobiles. At present, a main stream of new energy vehicles, namely pure electric vehicles, plug-in hybrid electric vehicles and the like are all provided with battery packs at the lower part of a floor.

Disclosure of Invention

The present disclosure provides a vehicle floor beam structure and an autonomous vehicle, which can improve structural strength of the vehicle floor beam structure.

According to a first aspect of the present disclosure, there is provided a vehicle floor beam structure comprising: the middle channel longitudinal beam, the reinforcing framework, the first bracket, the first cross beam for supporting the front row of seats, the second cross beam for supporting the front row of seats and the third cross beam for supporting the rear row of seats;

the first cross beam, the second cross beam and the third cross beam are sequentially arranged along the extending direction of the middle channel longitudinal beam, and the first cross beam, the second cross beam and the third cross beam are respectively and fixedly connected with the middle channel longitudinal beam;

the reinforcing framework is arranged between the second beam and the third beam, and the second beam is fixedly connected with the third beam through the reinforcing framework;

the middle channel longitudinal beam penetrates through the first cross beam, the middle channel longitudinal beam divides the first cross beam into a first section and a second section, the first section and the second section are respectively fixedly connected with the middle channel longitudinal beam, and the first section is fixedly connected with the second section through the first bracket.

According to a second aspect of the present disclosure there is provided an autonomous vehicle comprising the vehicle floor beam structure of the first aspect.

In this disclosed embodiment, because the first segmentation is connected with the second segmentation through first support, and be connected through well passageway longeron and strengthening skeleton respectively between second crossbeam and the third crossbeam, so, the power transmission passageway between first segmentation and the second segmentation can be established to first support, well passageway longeron and strengthening skeleton can establish the power transmission passageway between second crossbeam and the third crossbeam respectively, in this way, at the in-process that the vehicle bumps, the collision force that acts on vehicle floor beam frame structure can be through above-mentioned power transmission passageway dispersion to each position of vehicle floor beam frame structure to be favorable to reducing the degree of destruction to vehicle floor beam frame structure in the collision process. In addition, through set up first support in the junction of well passageway longeron and first crossbeam, be favorable to improving the structural strength of junction of well passageway longeron and first crossbeam.

Drawings

The drawings are for a better understanding of the present solution and are not to be construed as limiting the present disclosure. Wherein:

FIG. 1 is a schematic illustration of a vehicle floor beam structure in an embodiment of the present disclosure toward a side of a vehicle seat;

FIG. 2 is a schematic illustration of the structure of a vehicle floor beam structure on the side opposite a vehicle seat (i.e., the side of the open end of a center tunnel rail) in an embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a vehicle floor beam structure in an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of a mid-channel rail to first bracket connection in an embodiment of the present disclosure;

fig. 5 is a schematic cross-sectional view of a mid-channel rail, second bracket, and third bracket connection in an embodiment of the present disclosure.

Detailed Description

Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

Referring to fig. 1 to 5, fig. 1 to 5 are schematic structural diagrams of a vehicle floor beam structure according to an embodiment of the disclosure, where the vehicle floor beam structure includes: the middle channel side member 100, the reinforcement frame 600, the first bracket 200, the first cross member 300 for supporting the front seat, the second cross member 400 for supporting the front seat, and the third cross member 500 for supporting the rear seat;

the first cross beam 300, the second cross beam 400 and the third cross beam 500 are sequentially arranged along the extending direction of the middle channel longitudinal beam 100, and the first cross beam 300, the second cross beam 400 and the third cross beam 500 are respectively fixedly connected with the middle channel longitudinal beam 100;

the reinforcement cage 600 is disposed between the second beam 400 and the third beam 500, and the second beam 400 is fixedly connected to the third beam 500 through the reinforcement cage 600;

the middle channel longitudinal beam 100 penetrates through the first cross beam 300, the middle channel longitudinal beam 100 divides the first cross beam 300 into a first section 301 and a second section 302, the first section 301 and the second section 302 are respectively and fixedly connected with the middle channel longitudinal beam 100, and the first section 301 is fixedly connected with the second section 302 through the first bracket 200.

The vehicle floor beam structure may be a front floor beam structure of a vehicle. The vehicle floor beam structure may be used as a front floor beam of various types of vehicles, for example, a front floor beam of a general vehicle, a front floor beam of a new energy vehicle, a front floor beam of an autonomous vehicle, and the like.

The middle channel longitudinal beam 100 forms a middle channel of the vehicle floor beam structure, and when the vehicle floor beam structure is arranged on a vehicle, the extending direction of the middle channel longitudinal beam 100 is the length direction of the vehicle, and the length direction of the vehicle is the direction pointed by a connecting line between the head and the tail of the vehicle. Accordingly, the extending direction of the first cross member 300, the extending direction of the second cross member 400, and the extending direction of the third cross member 500 are the width direction of the vehicle. And the first, second and third cross members 300, 400 and 500 may be connected to the inner rocker panels of both sides of the vehicle, respectively. For example, referring to fig. 1, two ends of the first cross member 300 are fixedly connected with the right and left rocker beams 120 and 130 of the vehicle, respectively, and two ends of the second cross member 400 are fixedly connected with the right and left rocker beams 120 and 130 of the vehicle, respectively.

It will be appreciated that the first beam 300 and the second beam 400 may be positioned under the front row seat of the vehicle to support the front row seat, and the third beam 500 may be positioned under the rear row seat of the vehicle to support the rear row seat. Specifically, in one embodiment of the present disclosure, the first beam 300 may be a front beam of a front seat, the second beam 400 may be a rear beam of a front seat, and the third beam 500 may be a front beam of a rear floor.

The first cross member 300, the second cross member 400, and the third cross member 500 may be fixedly connected to the middle channel rail 100 by various common fixing connection methods such as welding, bolting, etc. Accordingly, the fixing connection manner among the reinforcement cage 600, the second beam 400 and the third beam 500 may be various common fixing connection manners such as welding and bolting. The fixing connection manner among the first section 301, the first bracket 200 and the second section 302 may also be various common fixing connection manners such as welding, bolting and the like.

Referring to fig. 1, the first cross member 300, the second cross member 400, and the third cross member 500 are respectively disposed in parallel, and the first cross member 300, the second cross member 400, and the third cross member 500 are arranged at intervals along the length direction of the middle channel longitudinal member 100, and the middle channel longitudinal member 100 is respectively connected to the middle portion of the first cross member 300, the middle portion of the second cross member 400, and the middle portion of the third cross member 500. And the first, second and third cross members 300, 400 and 500 are perpendicular to the middle channel side member 100, respectively.

Referring to fig. 3, the second cross member 400 is disposed through the middle channel rail 100, and the second cross member 400 divides the middle channel rail 100 into a fifth segment 101 and a sixth segment 102, where the fifth segment 101 and the sixth segment 102 are fixedly connected with the second cross member 400 respectively. The fifth section 101 separates the first cross-member 300 into the first section 301 and the second section 302. The first end of the sixth segment 102 is fixedly connected to the second beam 400, and the second end of the sixth segment 102 is fixedly connected to the third beam 500.

In the related art, a battery pack is generally arranged below a front floor of a vehicle, and because the battery pack occupies the space below the floor, a cross beam and a longitudinal beam cannot be arranged below the floor like a traditional fuel vehicle, if a force transmission structure is arranged on the upper part of a floor panel, the collision performance of the floor beam structure can be reduced, and further potential safety hazards are increased, for example, the battery pack is caused to explode due to extrusion deformation in the collision process.

Referring to fig. 2, the first section 301 is fixedly connected to the second section 302 through the first bracket 200, so that the first bracket 200 can conduct the acting force between the first section 301 and the second section 302 to establish a force transmission channel between the first section 301 and the second section 302, thereby improving the transverse force conduction effect of the vehicle. Accordingly, the sixth segment 102 and the reinforcing cage 600 can transfer the acting force between the second beam 400 and the third beam 500, so as to establish a force transfer channel between the second beam 400 and the third beam 500, that is, between the front floor and the rear floor of the vehicle, thereby improving the force transfer effect of the vehicle in the longitudinal direction.

It will be appreciated that when the vehicle floor beam structure is used as a front floor beam of a new energy vehicle, the underside of the vehicle floor beam structure will typically also be connected to a battery pack of the new energy vehicle. Because the vehicle floor beam frame structure that this disclosure provided can improve the effect of passing power at vehicle transverse and fore-and-aft to be favorable to reducing the destruction degree to vehicle floor beam frame structure in the collision process, and then be favorable to realizing the effective protection of the battery package that lies in vehicle floor beam frame structure below, reduce the risk that the battery package explodes in the collision process.

The first bracket 200 and the reinforcing frame 600 may be steel structural members of various shapes.

In this embodiment, since the first section 301 is connected to the second section 302 through the first bracket 200, and the second cross beam 400 is connected to the third cross beam 500 through the middle channel longitudinal beam 100 and the reinforcing frame 600, respectively, so the first bracket 200 can establish a force transmission channel between the first section 301 and the second section 302, and the middle channel longitudinal beam 100 and the reinforcing frame 600 can respectively establish a force transmission channel between the second cross beam 400 and the third cross beam 500, so in the process of collision of the vehicle, the collision force acting on the vehicle floor beam structure can be dispersed to each position of the vehicle floor beam structure through the force transmission channel, thereby being beneficial to reducing the damage degree to the vehicle floor beam structure in the collision process. In addition, by providing the first bracket 200 at the junction of the middle channel side member 100 and the first cross member 300, it is advantageous to improve the structural strength of the junction of the middle channel side member 100 and the first cross member 300.

Optionally, the vehicle floor beam structure further includes a second bracket 700 and a fourth cross member 900 for supporting the front wall baffle 110, the fourth cross member 900 is located on a side of the first cross member 300 opposite to the second cross member 400, the middle channel longitudinal beam 100 penetrates through the fourth cross member 900, and the middle channel longitudinal beam 100 divides the fourth cross member 900 into a third section 901 and a fourth section 902, and the third section 901 is fixedly connected with the fourth section 902 through the second bracket 700.

Referring to fig. 1, the front surrounding baffle 110 is a surrounding baffle located in front of the front seat, the fourth cross member 900 is located below the front surrounding baffle 110, and the fourth cross member 900 may be connected to the front surrounding baffle 110 to support the front surrounding baffle 110. The second bracket 700 may be various types of steel structural members.

Referring to fig. 1, the fourth cross member 900, the first cross member 300, the second cross member 400, and the third cross member 500 are sequentially arranged at intervals along the length direction of the middle channel rail 100. And the fourth beam 900, the first beam 300, the second beam 400, and the third beam 500 are respectively parallel.

In this embodiment, since the third section 901 is fixedly connected to the fourth section 902 through the second bracket 700, the second bracket 700 may establish a force transmission channel between the third section 901 and the fourth section 902, thereby being beneficial to further improving the transverse force transmission effect of the vehicle.

Optionally, a strip-shaped channel 103 extending along the length direction of the middle channel stringer 100 is formed in the middle channel stringer 100, and the middle channel stringer 100 includes an open end communicating with the strip-shaped channel 103, the second bracket 700 is disposed on one side of the open end of the middle channel stringer 100, and the second bracket 700 includes: a first protruding portion protruding toward the side of the strip-shaped channel 103, a first extending portion extending from the first protruding portion to the side of the third segment 901, and a second extending portion extending from the first protruding portion to the side of the fourth segment 902;

the first protruding portion is attached to the inner wall of the strip-shaped channel 103, the second bracket 700 is fixedly connected with the third section 901 through the first extending portion, and the second bracket 700 is fixedly connected with the fourth section 902 through the second extending portion.

It will be appreciated that the shape of the first protrusion may be the same as the shape of the inner wall of the strip-shaped channel 103, such that the first protrusion may be fully engaged with the inner wall of the strip-shaped channel 103. In addition, the second bracket 700 may be fixedly connected to the middle channel rail 100. The first and second extensions may extend from the open end of the middle channel rail 100 out of the strip channel 103.

For example, the second bracket 700 may be a channel-type structure, and the first and second extensions may be flanges on both sides of the second bracket 700.

In this embodiment, since the connection between the middle channel rail 100 and the fourth cross member 900 may need to bear the force from the fourth cross member 900 during the collision, the connection is a weak position of the middle channel rail 100, and in this embodiment of the disclosure, the first protrusion of the second bracket 700 is attached to the inner wall of the strip-shaped channel 103, so that the structure of the connection between the middle channel rail 100 and the fourth cross member 900 may be reinforced by the second bracket 700, thereby improving the structural strength of the weak position of the middle channel rail 100.

Optionally, the vehicle floor beam structure further includes a third bracket 800, where the third bracket 800 is located on a side of the middle channel rail 100 opposite to the second bracket 700, and the third bracket 800 is fixedly connected with the middle channel rail 100.

The third bracket 800 may be various steel structural brackets capable of reinforcing the structure, for example, referring to fig. 5, the third bracket 800 is a channel steel, and the notch of the third bracket 800 faces the outer wall of the middle channel rail 100. It will be appreciated that the third bracket 800 is disposed at a position where the middle channel rail 100 is used to connect the fourth cross member 900.

In this embodiment, by providing the third bracket 800, it is possible to further strengthen the weak position of the center tunnel side member 100, thereby improving the collision performance of the vehicle floor beam structure.

Alternatively, the middle channel girder 100 has a bar-shaped channel 103 formed therein, which extends in the longitudinal direction of the middle channel girder 100, and the middle channel girder 100 includes an open end communicating with the bar-shaped channel 103, the first bracket 200 is disposed at one side of the open end of the middle channel girder 100,

the first bracket 200 includes: a second protruding portion protruding toward the side of the strip-shaped channel 103, a third extending portion 201 extending from the second protruding portion to the side of the first segment 301, and a fourth extending portion 202 extending from the second protruding portion to the side of the second segment 302;

the second protruding portion is attached to the inner wall of the strip-shaped channel 103, the first support 200 is fixedly connected with the first segment 301 through the third extending portion 201, and the first support 200 is fixedly connected with the second segment 302 through the fourth extending portion 202.

It will be appreciated that the shape of the second protrusion may be the same as the shape of the inner wall of the strip-shaped channel 103, such that the second protrusion may be fully engaged with the inner wall of the strip-shaped channel 103. In addition, the first bracket 200 may be fixedly connected to the middle channel rail 100. The third extension 201 and the fourth extension 202 may extend from the open end of the middle channel rail 100 to outside the strip channel 103.

For example, the first bracket 200 may be a channel-type structure, and the third extension 201 and the fourth extension 202 may be flanges on both sides of the first bracket 200.

In this embodiment, since the connection between the middle channel rail 100 and the first cross member 300 may need to bear the force from the first cross member 300 during the collision, the connection is a weak position of the middle channel rail 100, and in this embodiment of the disclosure, the second protrusion of the first bracket 200 is attached to the inner wall of the strip-shaped channel 103, so that the structure of the connection between the middle channel rail 100 and the first cross member 300 may be reinforced by the first bracket 200, thereby improving the structural strength of the weak position of the middle channel rail 100.

Optionally, the middle channel stringer 100 includes: a first flange 104 located on the first section 301 side and a second flange 105 located on the second section 302 side, and the third extension 201 and the fourth extension 202 are respectively plate-shaped;

the third extension portion 201 is stacked with the first flange 104, and the third extension portion 201 is fixedly connected with the first flange 104; the fourth extension portion 202 is stacked with the second flange 105, and the fourth extension portion 202 is fixedly connected with the second flange 105.

The middle channel longitudinal beam 100 may be a channel steel, and the first flange 104 and the second flange 105 are flanges formed by bending outwards from an opening end of the middle channel longitudinal beam 100.

In this embodiment, the third extension 201 and the first flange 104 are stacked, and the third extension 201 and the first flange 104 are fixedly connected; the fourth extension 202 and the second flange 105 are stacked, and the fourth extension 202 and the second flange 105 are fixedly connected, so that the stability of connection among the first bracket 200, the first cross beam 300 and the middle channel longitudinal beam 100 can be further improved, and the overall structural strength of the vehicle floor beam structure can be further improved.

Optionally, the first section 301 includes a third flange 303 and a fourth flange 304, the third flange 303 and the fourth flange 304 being located on opposite sides of the first section 301;

the third flange 303 is stacked with the third extension portion 201, and the third flange 303 is located at a side of the third extension portion 201 opposite to the first flange 104, and the third flange 303 is fixedly connected with the third extension portion 201; the fourth flange 304 is stacked with the third extension portion 201, and the fourth flange 304 is located at a side of the third extension portion 201 opposite to the first flange 104, and the fourth flange 304 is fixedly connected with the third extension portion 201.

The first section 301 may be a channel steel, and the third flange 303 and the fourth flange 304 are flanges formed by bending outwards from an open end of the first section 301.

In this embodiment, the third flange 303 and the third extension portion 201 are stacked, and the third flange 303 and the third extension portion 201 are fixedly connected, and the fourth flange 304 and the third extension portion 201 are stacked, and the fourth flange 304 and the third extension portion 201 are fixedly connected, so that the stability of the connection among the first bracket 200, the first segment 301 and the middle channel longitudinal beam 100 can be further improved, and the structural strength of the whole vehicle floor beam structure can be further improved.

Optionally, the second section 302 includes a fifth flange 305 and a sixth flange 306, the fifth flange 305 and the sixth flange 306 being located on opposite sides of the second section 302;

the fifth flange 305 is stacked with the fourth extension portion 202, and the fifth flange 305 is located at a side of the fourth extension portion 202 opposite to the second flange 105, and the fifth flange 305 is fixedly connected with the fourth extension portion 202; the sixth flange 306 is stacked with the fourth extension portion 202, and the sixth flange 306 is located at a side of the fourth extension portion 202 opposite to the second flange 105, and the sixth flange 306 is fixedly connected with the fourth extension portion 202.

The second section 302 may be a channel steel, and the fifth flange 305 and the sixth flange 306 are flanges formed by bending outwards from the open end of the second section 302.

In this embodiment, the fifth flange 305 and the fourth extension 202 are stacked, and the fifth flange 305 and the fourth extension 202 are fixedly connected, and the sixth flange 306 and the fourth extension 202 are stacked, and the sixth flange 306 and the fourth extension 202 are fixedly connected, so that the stability of the connection among the first bracket 200, the second section 302 and the middle channel rail 100 can be further improved, and the structural strength of the whole vehicle floor beam structure can be further improved.

Optionally, the reinforcement frame 600 includes a first sub-frame 601 and a second sub-frame 602, and the first sub-frame 601 and the second sub-frame 602 are located at opposite sides of the middle channel rail 100;

a first end of the first sub-skeleton 601 is fixedly connected with the second cross beam 400, and a second end of the first sub-skeleton 601 is fixedly connected with the third cross beam 500; the first end of the second sub-skeleton 602 is fixedly connected with the second cross beam 400, and the second end of the second sub-skeleton 602 is fixedly connected with the third cross beam 500.

In this embodiment, the first sub-frame 601 and the second sub-frame 602 are respectively disposed on two sides of the middle channel longitudinal beam 100, so as to be used for connecting the second cross beam 400 and the third cross beam 500, and the first sub-frame 601 and the second sub-frame 602 can respectively perform longitudinal force transmission on two sides of the middle channel longitudinal beam 100, thereby further improving the longitudinal force transmission effect of the vehicle floor beam structure.

Alternatively, the first sub-frame 601 and the second sub-frame 602 are respectively in a rod shape, and the first sub-frame 601 and the second sub-frame 602 are symmetrically disposed with respect to the middle channel side member 100.

Referring to fig. 1, in one embodiment of the present disclosure, the first sub-frame 601 and the second sub-frame 602 may be parallel to the middle channel rail 100, respectively.

In this embodiment, the first sub-frame 601 and the second sub-frame 602 are symmetrically disposed about the middle channel longitudinal beam 100, so that the symmetry of the longitudinal force transmission on both sides of the vehicle can be ensured, and the force transmission effect of the vehicle floor beam structure can be further improved.

It will be appreciated that the above-described fixing connection manner between the respective components in the vehicle floor beam structure may be any type of fixing connection manner in the related art, for example, a connection manner using welding or bolting.

In one embodiment of the present disclosure, the fifth section 101 of the middle channel rail 100, the first cross member 300, and the second cross member 400 may be steel structures manufactured by a hot forming process. The sixth section 102 of the reinforcing frame 600 and the middle channel stringer 100 may be formed by cold stamping high-strength steel, so that the forming process is simple, the technology is mature, and the stability is good. The beam main body part adopts a thermoforming process, so that the beam main body part has high strength and excellent performance; the welding device is connected in a spot welding mode, a special welding station is not needed, the technology is mature, and the cost is low. After the front floor beam assembly is welded, the front floor beam assembly is welded with a front floor panel, then the front floor beam, the cabin, the rear floor and the like are spliced, the seat cross beam is lapped to the door sill beam, the middle channel longitudinal beam 100 is connected with the front wall baffle 110, the sixth section 102 of the middle channel longitudinal beam 100 and the reinforcing framework 600 are connected to the third cross beam 500, and a complete force transmission channel is formed. The first bracket 200 and the second bracket 700 may respectively employ a reinforcing frame in a figure shape.

The utility model provides a vehicle floor beam frame structure has increased first support 200 and reinforcing skeleton 600 on the channel structure basis in traditional seat crossbeam overlap joint, has formed more complete biography power passageway, and collision performance is better, not only can guarantee the performance of whole car collision, has still promoted the NVH performance at floor rear portion, and this structural process is present conventional cold stamping, thermoforming, spot welding technology simultaneously, and the cost is lower, and the quality is more stable, and the commonality is stronger, promotes the product competitiveness that can be very big.

Another embodiment of the present disclosure provides an autonomous vehicle including the vehicle floor beam structure of the above embodiment.

In this embodiment, since the autonomous vehicle includes the vehicle floor beam structure described in the above embodiment, the autonomous vehicle can implement each process of the vehicle floor beam structure, and has the same beneficial effects, and for avoiding repetition, the description thereof will be omitted.

It will be appreciated that the autonomous vehicle may be a new energy autonomous vehicle and that the underside of the vehicle floor beam structure may be connected with a battery pack for powering the entire vehicle. The automatic driving vehicle can effectively protect the battery pack in the collision process of the vehicle by adopting the vehicle floor beam frame structure.

The above detailed description should not be taken as limiting the scope of the present disclosure. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure are intended to be included within the scope of the present disclosure.

Claims (11)

1. A vehicle floor beam structure, comprising: the middle channel longitudinal beam, the reinforcing framework, the first bracket, the first cross beam for supporting the front row of seats, the second cross beam for supporting the front row of seats and the third cross beam for supporting the rear row of seats;

the first cross beam, the second cross beam and the third cross beam are sequentially arranged along the extending direction of the middle channel longitudinal beam, and the first cross beam, the second cross beam and the third cross beam are respectively and fixedly connected with the middle channel longitudinal beam;

the reinforcing framework is arranged between the second beam and the third beam, and the second beam is fixedly connected with the third beam through the reinforcing framework;

the middle channel longitudinal beam penetrates through the first cross beam, the middle channel longitudinal beam divides the first cross beam into a first section and a second section, the first section and the second section are respectively fixedly connected with the middle channel longitudinal beam, and the first section is fixedly connected with the second section through the first bracket.

2. The vehicle floor beam structure of claim 1, further comprising a second bracket and a fourth cross member for supporting a cowl panel, the fourth cross member being located on a side of the first cross member opposite the second cross member, the center tunnel rail being disposed through the fourth cross member, and the center tunnel rail dividing the fourth cross member into a third segment and a fourth segment, the third segment being fixedly connected to the fourth segment by the second bracket.

3. The vehicle floor beam structure according to claim 2, wherein a strip-shaped channel extending in a length direction of the center channel side member is formed in the center channel side member, and the center channel side member includes an open end communicating with the strip-shaped channel, the second bracket is provided on an open end side of the center channel side member, and the second bracket includes: a first protruding portion protruding toward one side of the strip-shaped channel, a first extending portion extending from the first protruding portion to one side of the third segment, and a second extending portion extending from the first protruding portion to one side of the fourth segment;

the first protruding portion is attached to the inner wall of the strip-shaped channel, the second support is fixedly connected with the third section through the first extending portion, and the second support is fixedly connected with the fourth section through the second extending portion.

4. The vehicle floor beam structure of claim 3, further comprising a third bracket located on a side of the center tunnel rail opposite the second bracket, and fixedly connected to the center tunnel rail.

5. The vehicle floor frame structure according to claim 1, wherein a strip-shaped channel extending in a longitudinal direction of the center channel side member is formed in the center channel side member, and the center channel side member includes an open end communicating with the strip-shaped channel, the first bracket is provided on an open end side of the center channel side member,

the first bracket includes: a second protruding portion protruding toward one side of the strip-shaped channel, a third extending portion extending from the second protruding portion to one side of the first segment, and a fourth extending portion extending from the second protruding portion to one side of the second segment;

the second protruding portion is attached to the inner wall of the strip-shaped channel, the first support is fixedly connected with the first section through the third extending portion, and the first support is fixedly connected with the second section through the fourth extending portion.

6. The vehicle floor beam structure according to claim 5, wherein the center tunnel rail includes: a first flanging at one side of the first section and a second flanging at one side of the second section, wherein the third extension part and the fourth extension part are respectively plate-shaped;

the third extension part is overlapped with the first flanging and is fixedly connected with the first flanging; the fourth extension part and the second flanging are stacked, and the fourth extension part and the second flanging are fixedly connected.

7. The vehicle floor beam structure of claim 6, wherein the first section includes a third flange and a fourth flange, the third flange and the fourth flange being located on opposite sides of the first section;

the third flanging is arranged in a lamination manner with the third extension part, the third flanging is positioned at one side of the third extension part opposite to the first flanging, and the third flanging is fixedly connected with the third extension part; the fourth flanging is laminated with the third extension part, and is positioned at one side of the third extension part opposite to the first flanging, and the fourth flanging is fixedly connected with the third extension part.

8. The vehicle floor beam structure of claim 6, wherein the second section includes a fifth flange and a sixth flange, the fifth flange and the sixth flange being located on opposite sides of the second section;

the fifth flanging is arranged in a lamination manner with the fourth extending part, the fifth flanging is positioned at one side of the fourth extending part opposite to the second flanging, and the fifth flanging is fixedly connected with the fourth extending part; the sixth flanging is laminated with the fourth extension part, and is positioned at one side of the fourth extension part opposite to the second flanging, and the sixth flanging is fixedly connected with the fourth extension part.

9. The vehicle floor beam structure according to claim 1, wherein the reinforcement frame includes a first sub-frame and a second sub-frame, the first sub-frame and the second sub-frame being located on opposite sides of the center tunnel rail;

the first end of the first sub-framework is fixedly connected with the second cross beam, and the second end of the first sub-framework is fixedly connected with the third cross beam; the first end of the second sub-framework is fixedly connected with the second cross beam, and the second end of the second sub-framework is fixedly connected with the third cross beam.

10. The vehicle floor beam structure according to claim 9, wherein the first sub-frame and the second sub-frame are respectively rod-shaped, and the first sub-frame and the second sub-frame are symmetrically disposed with respect to the center tunnel side member.

11. An autonomous vehicle comprising a vehicle floor beam structure as claimed in any one of claims 1 to 10.