CN216580497U - Extensible aluminum honeycomb spliced floor for rail transit vehicle - Google Patents

Abstract

The utility model provides an extensible aluminum honeycomb spliced floor for a rail transit vehicle, which comprises a third plate, a fourth plate and a fifth plate, wherein the third plate, the fourth plate and the fifth plate respectively comprise a honeycomb core, a circumferential framework arranged around the honeycomb core, and a top plate and a bottom plate which respectively cover the honeycomb core and the circumferential framework from the upper side and the lower side, the circumferential framework comprises an L-shaped aluminum profile, the L-shaped aluminum profile comprises a first L-shaped aluminum profile and/or a second L-shaped aluminum profile, one side of the wall thickness of the first L-shaped aluminum profile and one side of the wall thickness of the second L-shaped aluminum profile are connected with the honeycomb core, the other side of the wall thickness of the first L-shaped aluminum profile and the second L-shaped aluminum profile are reversely arranged to realize splicing, and the third plate, the fourth plate and the fifth plate can be continuously spliced in an extending mode. By utilizing three plates which are divided and designed, and respectively arranging corresponding L-shaped aluminum profiles on two sides of each plate, the L-shaped aluminum profiles can be utilized to realize continuous extensible splicing.

Description

Extensible aluminum honeycomb spliced floor for rail transit vehicle

Technical Field

The utility model belongs to the technical field of vehicle floors, particularly relates to a floor used by a rail transit vehicle, and particularly relates to an extensible aluminum honeycomb spliced floor for the rail transit vehicle.

Background

At present, the popularization and development of urban rail transit in China put forward higher performance design requirements on the use of parts of rail vehicles, and vehicle floors belong to important parts of the rail vehicles. Aluminum honeycomb floor is widely used in making rail transit vehicle floor, and on the manufacturing process of aluminum honeycomb panel spare, the brazing replaced original gluing process of having generally adopted, and brazing aluminum honeycomb floor all adopts metal material to make and forms, and each aspect mechanical properties all is superior to gluing aluminum honeycomb floor material, still has better fire behavior and environmental protection's characteristics etc. uses welding aluminum honeycomb floor as the material on rail transit vehicle floor and has become general trend.

In the process of manufacturing the rail transit vehicle floor by using the welded aluminum honeycomb plate, the strength of the floor needs to be considered, a circumferential framework is usually required to be added around the plate made of the plate, but if the plate is large in size, an insert is required to be embedded in the middle to increase the strength, so that the plate processing process becomes complicated.

In order to solve the problems, the applicant divides a large floor into a plurality of plates which can be spliced with each other, then the plates are spliced with each other, so that the floor which meets the requirements of different parts of a rail transit vehicle can be conveniently assembled, the peripheral framework of the overlapped parts of the plates plays a role in reinforcement, an insert does not need to be added in the middle of a honeycomb core during the manufacturing of each plate, and the manufacturing process is simplified.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems brought forward by the background technology, the utility model provides an extensible aluminum honeycomb spliced floor for a rail transit vehicle, which is used for paving the main floor of a carriage of the rail transit vehicle.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an extensible aluminum honeycomb spliced floor for rail transit vehicles comprises a third plate, a fourth plate and a fifth plate, wherein the third plate, the fourth plate and the fifth plate respectively comprise a honeycomb core, a circumferential framework arranged around the honeycomb core, and a top plate and a bottom plate which respectively cover the honeycomb core and the circumferential framework from the upper side and the lower side, the circumferential framework comprises L-shaped aluminum profiles, the L-shaped aluminum profiles comprise first L-shaped aluminum profiles and/or second L-shaped aluminum profiles, one sides of the wall thicknesses of the first L-shaped aluminum profiles and the second L-shaped aluminum profiles are connected with the honeycomb core, one sides of the wall thicknesses of the first L-shaped aluminum profiles and the second L-shaped aluminum profiles are reversely arranged to realize splicing between the first L-shaped aluminum profiles and the second L-shaped aluminum profiles, at least one group of opposite two side edges of the third plate are provided with the second L-shaped aluminum profiles, at least one group of the fourth plate and two side edges corresponding to the two side edges of the third plate provided with the second L-shaped aluminum profiles are provided with the first L-shaped aluminum profiles, the fifth plate is at least provided with the second L-shaped aluminum section bar at one side edge corresponding to one side edge of the fourth plate, wherein the first L-shaped aluminum section bar is arranged at one side edge of the fifth plate, the second L-shaped aluminum section bar is arranged at one side edge corresponding to one side edge of the third plate, wherein the second L-shaped aluminum section bar is arranged at one side edge of the fifth plate, the first L-shaped aluminum section bar is arranged at one side edge of the third plate, the fourth plate and the fifth plate, and the third plate, the fourth plate and the fifth plate can be continuously spliced in an extending mode.

Preferably, a thin side wall of the first L-shaped aluminum profile is arranged toward the top plate and provided with a countersunk hole, a thin side wall of the second L-shaped aluminum profile is arranged toward the bottom plate and provided with a threaded hole or a through hole, and a screw penetrates through the countersunk hole and the threaded hole or the through hole to realize splicing.

Preferably, a positioning hole is arranged at the center of the plane of the fourth plate.

Preferably, the third plate and the fifth plate are in a convex structure in plane, and the L-shaped aluminum profile is arranged on the long side and the short side opposite to the convex structure.

Preferably, the convex-shaped structure is symmetrically protruded at two sides, and the length and the width of the part symmetrically protruded at two sides are 130mm and 288 mm.

Preferably, the length of one side of the third plate and the fifth plate on which the second L-shaped aluminum profile is disposed is equal to the length of one side of the fourth plate on which the first L-shaped aluminum profile is disposed, and the length of the other side of the third plate on which the second L-shaped aluminum profile is disposed is equal to the length of one side of the fifth plate on which the first L-shaped aluminum profile is disposed.

Preferably, the widths of the thin-walled sides of the first L-shaped aluminum profile and the second L-shaped aluminum profile are different by 2 mm.

Preferably, the width of the thin side of the first L-shaped aluminum profile is 2mm greater than that of the thin side of the second L-shaped aluminum profile, and the distance between the center of the countersunk hole and the outer side of the first plate is 5mm greater than that between the center of the threaded hole or the through hole and the outer side of the second plate.

Preferably, the other sides of the periphery framework which are not provided with the L-shaped aluminum profiles are all made of hollow aluminum profiles.

Preferably, the thickness of the honeycomb core is 10-20mm, and the thickness of the top plate is 1-3 times that of the bottom plate.

The beneficial effects of the utility model include: through utilizing three panels of cutting apart the design, set up corresponding L type aluminium alloy in respective both sides limit respectively, utilize L type aluminium alloy can realize lasting extensible concatenation, so design three but two panels, be to the characteristics of track traffic vehicle floor, need add the aluminium alloy in convex both sides and realize strengthening, through rationally cut apart and set up after L type aluminium alloy, the concatenation floor of this structure can satisfy the pavement of track traffic vehicle carriage main floor, the extensible spreads whole carriage, and connect simple and conveniently, it is efficient to pave, the intensity satisfies the requirement after mating pavement.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.

FIG. 1 is a schematic view of a welded aluminum honeycomb composite panel used in the present invention;

fig. 2 is a schematic top view of a first plate 100 according to the present invention;

FIG. 3 is a schematic view of the structure of section A-A in FIG. 2;

FIG. 4 is an enlarged view of the structure at X in FIG. 3;

FIG. 5 is an enlarged view of the structure at Y in FIG. 2;

FIG. 6 is a schematic view of the cross-sectional structure C-C of FIG. 2;

FIG. 7 is an enlarged view of the structure at Z in FIG. 3;

fig. 8 is a schematic top view of a second plate 200 according to the present invention;

FIG. 9 is a schematic view of the structure of section A-A in FIG. 8;

FIG. 10 is an enlarged view of the structure at Y in FIG. 9;

FIG. 11 is an enlarged view of the structure at Z in FIG. 8;

fig. 12 is a schematic view of a floor structure formed by splicing the first plate member 100 and the second plate member 200;

FIG. 13 is a schematic top view of a third plate according to the present invention;

FIG. 14 is a schematic top view of a fourth plate according to the present invention;

fig. 15 is a schematic top view of a fifth plate according to the present invention;

FIG. 16 is a schematic view of the cross-sectional structure A-A of FIG. 15;

FIG. 17 is an enlarged view of the structure of FIG. 16 at X;

FIG. 18 is an enlarged view of the structure at Y in FIG. 16;

fig. 19 is a schematic structural view of a floor formed by splicing the third plate member 300, the fourth plate member 400 and the fifth plate member 500;

fig. 20 is a schematic top view of a sixth plate according to the present invention;

fig. 21 is a schematic view of a floor structure formed by splicing the fourth plate 400 and the sixth plate 600.

In the figure: the honeycomb core comprises a honeycomb core 1, a circumferential framework 2, an L-shaped aluminum profile 21, a first L-shaped aluminum profile 211, a counter bore 2111, a second L-shaped aluminum profile 212, a through hole or threaded hole 2121, a hollow aluminum profile 22, a first hollow aluminum profile 221, a second hollow aluminum profile 222, a top plate 3, a bottom plate 4, an additional aluminum profile 5, a first long additional aluminum profile 51, a first short additional aluminum profile 52, a second short additional aluminum profile 53, a second long additional aluminum profile 54, a clearance 6, a first half clearance 61, a second half clearance 62, a first plate 100, a second plate 200, a third plate 300, a fourth plate 400, a fifth plate 500 and a sixth plate 600.

Detailed Description

The present invention will be further described with reference to the accompanying drawings so as to facilitate the understanding of the present invention by those skilled in the art.

All directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship, movement, etc. of each component in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed correspondingly; descriptions of the present invention as relating to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated; the length, width and thickness are consistent with the direction marked by the directional arrow in the drawings under the unambiguous condition, but the corresponding relation is not absolute and can be specifically expressed according to the custom of the person skilled in the art as long as the meaning of the expression is clear; the technical scheme described in the specification aims to achieve the purpose of the utility model, and the parts which are not described in detail are achieved by adopting the prior art.

As shown in fig. 1, the welded aluminum honeycomb composite panel used in the present invention includes a honeycomb core 1, a top plate 3 and a bottom plate 4, and is manufactured by using a brazing process, and the specific method is as follows: the welding aluminum honeycomb core 1 is used as a core material, the honeycomb core 1 is formed by brazing with hexagonal columns firstly, then aluminum panels are respectively coated on two sides to be used as a top plate 3 and a bottom plate 4, wherein the thickness of the top plate 3 is twice of that of the bottom plate 4, and the combined aluminum honeycomb core is placed in a brazing furnace and is welded at one time in a temperature field of 580-610 ℃.

The utility model discloses a welded aluminum honeycomb composite board, which is an improved process aiming at an adhesive corrugated aluminum board and an adhesive aluminum honeycomb board used in the prior art, wherein the improved composite board is used for manufacturing a floor used by a rail transit vehicle, and has the following advantages: 1) the weight reduction effect is good, the weight is light, and the surface density is small; 2) high specific stiffness and high compressive strength; 3) the node strength is high, and the peeling strength of the roller is high; 4) excellent energy absorption, shock absorption and impact resistance; 5) the material also has excellent performances of high temperature resistance, heat conduction, heat insulation, sound insulation, noise elimination and the like; 6) has the advantages of no smoke, no toxicity, environmental protection and recyclability. After the material is used for processing and customizing the rail transit vehicle floor, the service life reaches 30 years, and the maintenance cost is obviously reduced.

Example 1: as shown in fig. 2-7, in order to utilize the first plate 100 for the rail transit vehicle floor manufactured by the welded aluminum honeycomb composite board shown in fig. 1, the first plate 100 includes a honeycomb core 1, a peripheral frame 2 disposed around the honeycomb core 1, and a top plate 3 and a bottom plate 4 respectively covering the honeycomb core 1 and the peripheral frame 2 from the upper and lower surfaces, the honeycomb core 1 is cut into a convex structure, a first half avoidance space 61 is disposed on the longest side of the honeycomb core 1 (the bottom side of the convex structure), the first half avoidance space 61 is recessed toward the inner side of the honeycomb core 1, the recessed depth is 96mm, the length is 310mm, the recessed is formed by removing the material at the corresponding position of the honeycomb core 1, the peripheral frame 2 includes an L-shaped aluminum profile 21 disposed outside the longest bottom side of the convex structure, the L-shaped aluminum profile 21 is divided into two sections, the first half is disconnected from the vacancy 61, other edges of the honeycomb core 1 are surrounded by hollow aluminum profiles 22, the hollow aluminum profiles 22 are divided into a plurality of sections and are tightly connected with each other, one of the sides of the convex part of the convex structure is provided with a section of structure inclining outwards, the inclined edge of the structure inclining outwards forms an included angle of 155 degrees with the corresponding convex structure positioned on the original edge (the second hollow aluminum profile 222 and the first hollow aluminum profile 221), the outer side of the hollow aluminum profile 22 connected with the convex top edge of the convex structure of the honeycomb core 1 is provided with an additional aluminum profile 5, the convex top edge of the convex structure and the outermost side corresponding to the structure inclining outwards are provided with a first short additional aluminum profile 52, and the convex top edge of the convex structure is also provided with a first long additional aluminum profile 51, the first long extra aluminum section 51 extends for a certain length on the protruded top edge of the zigzag structure but keeps a certain distance from both ends, the first short extra aluminum section 52 is arranged with a length of 51mm and a width of 28mm, the first long extra aluminum section 51 is arranged with a width of 13mm, the L-shaped aluminum section 21 is a first L-shaped aluminum section 211, the thick side of the first L-shaped aluminum section 211 is connected with the honeycomb core 1, the thin side faces the outer side of the first sheet 100, the wall of the thin side of the first L-shaped aluminum section 211 is arranged closely to the top plate 3 and is provided with a countersunk hole 2111, the bottom plate 4 is cut at a position corresponding to the wall of the thin side of the first L-shaped aluminum section 211, the countersunk hole 2111 is used for fixedly connecting with an adjacent floor sheet when the first sheet 100 is connected to form a rail transit vehicle floor, the height difference between the thick wall and the thin wall of the first L-shaped aluminum section 211 is 8mm, the thickness of the top plate 3 is 2 times of the thickness of the bottom plate 4, a primer is sprayed on the top plate 3, the thickness of the honeycomb core 1 is 15mm, the thickness of the circumferential framework 2 corresponds to the thickness of the honeycomb core 1, the width of the hollow aluminum profile 22 is 50mm (the direction of the hollow aluminum profile 22 is changed and does not necessarily correspond to the direction indicated by a directional arrow in the drawing, the length of the hollow aluminum profile is each side of the corresponding plate, the thickness corresponds to the thickness of the honeycomb core, and the width direction is easy to understand), the width of the first L-shaped aluminum profile 211 is 60mm, wherein the width of the thin side is 40mm, the distance between the center line of the countersunk hole 2111 and the outermost side of the side where the countersunk hole is located is 16mm, and the hollow aluminum profile 22 is a square hollow aluminum profile with the wall thickness of 2 mm.

Example 2: as shown in fig. 8-11, in order to utilize the second plate 200 for the rail transit vehicle floor manufactured by the welded aluminum honeycomb composite board shown in fig. 1, the second plate 200 includes a honeycomb core 1, a peripheral frame 2 disposed around the honeycomb core 1, and a top plate 3 and a bottom plate 4 respectively covering the honeycomb core 1 and the peripheral frame 2 from the upper and lower surfaces, the honeycomb core 1 is cut into a convex structure, a second half-avoiding space 62 is disposed on the longest side of the honeycomb core 1 (the bottom side of the convex structure), the first half-avoiding space 62 is recessed toward the inner side of the honeycomb core 1, the recessed depth is 101mm, the length is 310mm, the recessed is to form a gap by removing the material at the corresponding position of the honeycomb core 1, the peripheral frame 2 includes a second L-shaped aluminum profile 212 disposed outside one bottom side of the convex structure, the second L-shaped aluminum profile 212 is divided into two sections, the second half clearance position 62 is disconnected, other edges of the honeycomb core 1 are surrounded by hollow aluminum profiles 22, the hollow aluminum profiles 22 are divided into a plurality of sections and are tightly connected with each other, one section of outward-inclined structure is arranged on one side of the convex position of the convex-shaped structure, a plurality of sections of bent hollow aluminum profiles 22 are arranged on the inclined edge of the outward-inclined structure, an outward-convex part is formed between the corresponding sides of the convex-shaped structure, the outer side of the hollow aluminum profile 22 connected with the convex top edge of the convex-shaped structure of the honeycomb core 1 is provided with additional aluminum profiles 5, the convex top edge of the convex-shaped structure and the outermost side corresponding to the outward-inclined structure are provided with second short additional aluminum profiles 53, and the convex top edge of the convex-shaped structure is also provided with second long additional aluminum profiles 54, the second long extra aluminum profile 54 extends for a certain length on the protruded top edge of the convex-shaped structure, but keeps a certain distance with both ends, the second short extra aluminum profile 53 is provided with a length of 140mm and a width of 28mm, the first long extra aluminum profile 54 is provided with a width of 13mm, the L-shaped aluminum profile 21 is a second L-shaped aluminum profile 212, the thick side of the second L-shaped aluminum profile 212 is connected with the honeycomb core 1, the thin side of the second L-shaped aluminum profile faces the outer side of the second plate 200, the wall of the thin side of the second L-shaped aluminum profile 212 is tightly attached to the bottom plate 4 and is provided with a through hole or a threaded hole 2121 thereon, the top plate 3 is cut at a position corresponding to the wall of the thin side of the second L-shaped aluminum profile 212, the through hole or the threaded hole 2121 is used for fixedly connecting the second plate 200 to an adjacent floor plate when the second plate is connected to form a rail transit vehicle floor, and the height difference between the thick wall and the thin wall of the second L-shaped aluminum profile is 8mm, the thickness of the top plate 3 is 2 times of the thickness of the bottom plate 4, a primer is sprayed on the top plate 3, the thickness of the honeycomb core 1 is 15mm, the thickness of the circumferential framework 2 corresponds to the thickness of the honeycomb core 1, the width of the hollow aluminum profile 22 is 50mm (the direction of the hollow aluminum profile 22 is changed and does not necessarily correspond to the direction indicated by a directional arrow in the drawing, it is easy to understand that the length of the hollow aluminum profile is corresponding to each side of a plate, the thickness corresponds to the thickness of the honeycomb core, and the width direction is easy to understand), the width of the second L-shaped aluminum profile 212 is 60mm, the width of the thin side is 38mm, the distance between the center line of the through hole or the threaded hole 2121 and the outermost side of the through hole or the threaded hole is 21mm, and the hollow aluminum profile 22 is a square hollow aluminum profile with the wall thickness of 2 mm.

Referring to fig. 12, in order to form a spliced aluminum honeycomb floor for a rail transit vehicle with an escape space 6 by using the first and second sheets 100 and 200 of examples 1 and 2 in combination, after the first and second sheets 100 and 200 are overlapped together by the first and second L- shaped aluminum profiles 211 and 212, the first and second sheets 100 and 200 are connected together by screws passing through the countersunk holes 2111 and the through holes or threaded holes 2121, so that the first and second half escape spaces 61 and 62 are combined to form the escape space 6, the escape space 6 is used for correspondingly installing equipment such as a lavatory pan which needs to penetrate through the floor of the rail transit vehicle, the inner side of the inclined structure is used for installing a washstand, the door entrance position of the rail transit vehicle is shown by an arrow in the drawing, the L-shaped aluminum profile is arranged to facilitate the installation of the lavatory pan, secondly, the installation of the board is convenient, thirdly, the strength of the floor is enhanced.

Example 3: as shown in fig. 13, in order to use the third plate 300 for the floor of the rail transit vehicle made of the welded aluminum honeycomb composite plate shown in fig. 1, the composition structure of the third plate 300 is similar to that of the embodiments 1 and 2, the design principle is similar, and the L-shaped aluminum profiles 21 are added to realize the splicing between the plates, except that the overall structure is a convex structure, but the specific size design is different to meet the requirements of the floor size and shape of different parts of the rail transit vehicle, the second L-shaped aluminum profile 212 is used on both sides of the bottom long side and the top short side of the convex structure, and the protruding part size on both sides of the convex structure is 130mm in length and 288mm in width (expressed by the same direction as the direction indicated by the directional arrow).

Example 4: as shown in fig. 14, in order to utilize the fourth plate 400 for the floor of the rail transit vehicle, which is manufactured by welding the aluminum honeycomb composite plate shown in fig. 1, the composition structure of the fourth plate 400 is similar to that of embodiments 1, 2 and 3, and the design principle is also similar, and the plates are spliced by adding the L-shaped aluminum profile 21, wherein the difference is that the overall structure is a rectangular structure for meeting the requirements of the size and the shape of the floor at different positions of the rail transit vehicle, the first L-shaped aluminum profile 211 is adopted on both sides of the long side of the rectangular structure, a positioning hole (not marked) is arranged in the center of the first L-shaped aluminum profile 211, and the diameter of the positioning hole is 60 mm.

Example 5: as shown in fig. 15-18, in order to provide a fifth plate 500 for a rail transit vehicle floor manufactured by using the welded aluminum honeycomb composite plate shown in fig. 1, the composition structure of the fifth plate 500 is similar to that of embodiments 1, 2, 3, and 4, the design principle is similar, and the plate members are spliced by adding L-shaped aluminum profiles 21, especially the structure is similar to that of embodiment 3, except that the second L-shaped aluminum profile 212 and the first L-shaped aluminum profile 211 are respectively adopted on both sides of the bottom long side and the top short side of the convex structure, the arrangement of the countersunk holes 2111 and the threaded holes 2121 is the same as that of embodiments 1 and 2, and the position size is also the same.

As shown in fig. 19, in order to combine and use the third plate 300, the fourth plate 400 and the fifth plate 500 of embodiments 3, 4 and 5 to form an extendable aluminum cellular splice floor for a rail transit vehicle, the splicing method can be easily understood with reference to the above description, the splice floor can be continuously spliced to achieve the extension of the length of the floor, the floor can be used for paving the floor of the main compartment of the rail transit vehicle, the protruded parts on the two sides in fig. 13 correspond to the positions of the doors, the recessed parts are connected with the compartment walls, the installation of the split and then spliced floor is convenient, the strength is improved, and the floor can be extended and paved on the whole compartment floor.

Example 6: as shown in fig. 20, in order to obtain a sixth plate 600 for a floor of a rail transit vehicle, which is made of the welded aluminum honeycomb composite plate shown in fig. 1, the composition structure of the sixth plate 600 is similar to that of the above-mentioned embodiments, and the design principle is similar, and the L-shaped aluminum profiles 21 are added to splice the plates, except that the convex structure has a change in size, the width of the convex top edge is 668mm, the length is 1614mm, and the convex top edge is symmetrical on both sides (the convex shapes of the above embodiments 3 and 5 are also symmetrical on both sides, as can be seen in the drawings), and the second L-shaped aluminum profile 212 is arranged on the longest bottom edge of the convex structure.

As shown in fig. 21, in order to form a bilaterally symmetrically connected aluminum honeycomb splice floor for a rail transit vehicle by combining and using the fourth plate 400 and the sixth plate 600 of embodiments 4 and 6, the splicing method can be easily understood by referring to the above description, one fourth plate 400 is used to connect two sixth plates 600 on both sides, and the floor can be used for paving the floor of an independent small compartment of a rail transit vehicle, such as a cab, etc., and the split and then spliced floor is convenient to install and has improved strength, and can be designed and paved corresponding to the characteristics of the floor of the independent small compartment.

The above examples are intended to illustrate specific embodiments of the present invention, but not to limit the present invention, and the present invention may be modified and modified without departing from the principle of the present invention, and the modified and modified should be construed as the protection scope of the present invention.

Claims (10)

1. An extensible aluminum honeycomb spliced floor for rail transit vehicles is characterized by comprising a third plate, a fourth plate and a fifth plate, wherein the third plate, the fourth plate and the fifth plate respectively comprise a honeycomb core, a circumferential framework arranged around the honeycomb core, and a top plate and a bottom plate which respectively cover the honeycomb core and the circumferential framework from the upper side and the lower side, the circumferential framework comprises L-shaped aluminum profiles, the L-shaped aluminum profiles comprise first L-shaped aluminum profiles and/or second L-shaped aluminum profiles, one sides of the wall thicknesses of the first L-shaped aluminum profiles and the second L-shaped aluminum profiles are connected with the honeycomb core, one sides of the wall thicknesses of the first L-shaped aluminum profiles and the second L-shaped aluminum profiles are reversely arranged to realize splicing between the first L-shaped aluminum profiles and the second L-shaped aluminum profiles, at least one group of opposite two sides of the third plate are provided with the second L-shaped aluminum profiles, at least one group of the fourth plate is provided with the first L-shaped aluminum profiles at two sides corresponding to the two sides of the third plate which are provided with the second L-shaped aluminum profiles, the fifth plate is at least provided with the second L-shaped aluminum section bar at one side edge corresponding to one side edge of the fourth plate, wherein the first L-shaped aluminum section bar is arranged at one side edge of the fifth plate, the second L-shaped aluminum section bar is arranged at one side edge corresponding to one side edge of the third plate, wherein the second L-shaped aluminum section bar is arranged at one side edge of the fifth plate, the first L-shaped aluminum section bar is arranged at one side edge of the third plate, the fourth plate and the fifth plate, and the third plate, the fourth plate and the fifth plate can be continuously spliced in an extending mode.

2. The extendable rail transit vehicle aluminum honeycomb splice floor of claim 1, wherein the first L-shaped aluminum profile thin-walled sidewall is disposed toward the top plate and has a counterbore disposed thereon, the second L-shaped aluminum profile thin-walled sidewall is disposed toward the bottom plate and has a threaded hole or a through hole disposed thereon, and a screw is used to pass through the counterbore and the threaded hole or the through hole to achieve splicing.

3. The extendable rail transit vehicle aluminum honeycomb splice floor of claim 1, wherein one locating hole is provided at the center of the plane of the fourth plate.

4. The extendable rail transit vehicle aluminum honeycomb splice floor of claim 1, wherein the third and fifth panel planes are in a zig-zag configuration, the L-shaped aluminum profiles being disposed on opposite long and short sides of the zig-zag configuration.

5. The extendable rail transit vehicle aluminum honeycomb splice floor of claim 4, wherein the zigzag structure is symmetrically protruded at both sides, and the symmetrically protruded portion at both sides has a length of 130mm and a width of 288 mm.

6. The extendable rail transit vehicle aluminum honeycomb splice floor of claim 4 or 5, wherein the third plate and the fifth plate provide the second L-shaped aluminum profile with a side length equal to that of the fourth plate providing the first L-shaped aluminum profile, and the third plate provides the second L-shaped aluminum profile with the other side length equal to that of the fifth plate providing the first L-shaped aluminum profile.

7. The extendable rail transit vehicle aluminum honeycomb splice floor of claim 1, wherein the width of the thin-walled side of the first and second L-shaped aluminum profiles differs by 2 mm.

8. The extendable rail transit vehicle aluminum honeycomb splice floor of claim 2, wherein the width of the thin wall side of the first L-shaped aluminum profile is 2mm greater than the width of the thin wall side of the second L-shaped aluminum profile.

9. The extendable rail transit vehicle aluminum honeycomb splice floor of any one of claims 1-5, wherein the perimeter frame is made of hollow aluminum profiles on the other sides where no L-shaped aluminum profile is provided.

10. The extendable rail transit vehicle aluminum honeycomb splice floor of any one of claims 1-5, wherein the honeycomb core thickness is 10-20mm and the top plate thickness is 1-3 times the bottom plate thickness.

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