New energy commercial vehicle flat floor

Abstract

The application discloses a new energy commercial vehicle flat floor, comprising a floor assembly and a vehicle frame, the floor assembly has a front floor and a rear floor, the rear floor is a flat floor, the rear floor is provided with a main driver seat installation position and a co-driver seat installation position, a cooling liquid filling tank and a multi-in-one control box located below the rear floor are transferred to the vehicle frame, so that the height of the plane where the rear floor is located is reduced, and the vertical space of the main driver seat installation position and the co-driver seat installation position is increased. By transferring the cooling liquid filling tank and the multi-in-one control box to the vehicle frame, on the one hand, when the cooling liquid is filled and the multi-in-one control box is overhauled, it is not necessary to overturn the cab or reserve an overhauling opening in the cab, the overhauling efficiency and convenience are improved, and meanwhile, the height of the rear floor can be reduced, so that the cab seat has more selectivity.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of new energy commercial vehicles, and particularly relates to a new energy commercial vehicle flat floor. BACKGROUND

[0002] In order to meet the needs of environmental protection and oil crisis, reduce or give up the current mainstream vehicle type of burning traditional gasoline or diesel driven internal combustion engine, new energy vehicles have been rapidly developed in recent years. The new energy vehicle uses unconventional vehicle fuel as the power source, and integrates the advanced technology of vehicle power control and driving, and innovates and optimizes the structure. With the development of new energy vehicle technology, new energy commercial vehicles gradually replace traditional fuel vehicles, and the demand for new energy commercial vehicles is increasing. At the same time, the comfort, safety and convenience of new energy commercial vehicles are also increasingly required by drivers. Because the traditional fuel vehicle has an engine and a radiator in the middle and lower part of the rear section of the floor, in order to avoid it, there is a bulge in the middle of the rear section of the floor, and the main and auxiliary driver seats are also installed at a higher position. The existing market pure electric light truck or oil-electric hybrid light truck arranges the three electric systems under the existing floor, so there is a large space waste under the bulge, and because the height of the floor is high, the space of the cab is small, especially in the seat setting of the cab, only ordinary seats or small stroke air bag seats can be configured, which cannot meet the requirements of the driver for the comfort of driving. In addition, when the three electric systems are overhauled, the cab needs to be turned over or lifted, which is low in overhaul efficiency, poor in safety, and inconvenient for the overhaul personnel. SUMMARY

[0003] The present application provides a new energy commercial vehicle flat floor to solve at least one of the above technical problems.

[0004] The technical scheme adopted by the present application is: a new energy commercial vehicle flat floor, comprising a floor assembly and a vehicle frame, the floor assembly has a front floor and a rear floor, the rear floor is a flat floor, the rear floor has a main driver seat installation position and an auxiliary driver seat installation position, the cooling liquid filling tank and the all-in-one control box located below the rear floor are transferred to the vehicle frame, thereby reducing the height of the plane where the rear floor is located, and increasing the vertical space of the main driver seat installation position and the auxiliary driver seat installation position.

[0005] Preferably, the main driver seat installation position and the auxiliary driver seat installation position are respectively connected with a first seat installation support and a second seat installation support, and the first seat installation support and the second seat installation support have different heights to adapt to the seat installation requirements of different vertical spaces.

[0006] Preferably, the first seat installation support and the second seat installation support are respectively connected with a large stroke air bag seat.

[0007] Preferably, a large-stroke airbag seat is connected to the first seat mounting bracket, and a double-person folding seat is connected to the second seat mounting bracket, and the cushion of the double-person folding seat is located in the same horizontal plane as the cushion of the large-stroke airbag seat, so that the double-person folding seat and the large-stroke airbag seat are connected in cooperation and integrated as a whole.

[0008] Preferably, the floor assembly further has left and right rear upright inner plates welded to the left and right sides of the rear floor, left and right door sill inner plates welded to the left and right sides of the front floor, and a floor framework welded below the front floor and the rear floor, so as to increase the strength of the front floor and the rear floor.

[0009] Preferably, the floor framework comprises left and right longitudinal beams, a front cross beam and a rear cross beam surrounding a support frame, the left and right longitudinal beams each have a front section below the front floor and a rear section below the rear floor, and the height difference between the front section and the rear section of the left longitudinal beam and the right longitudinal beam is reduced.

[0010] Preferably, a rear reinforcing cross beam is connected between the left and right longitudinal beams, and the rear reinforcing cross beam is close to the rear cross beam, so as to increase the strength of the rear floor.

[0011] Preferably, the rear cross beam is connected with a seat support plate.

[0012] Preferably, a seat fixing nut plate is arranged between the floor framework and the rear floor, so as to support the seat fixing nut plate by the floor framework.

[0013] Preferably, a reinforcing rib is formed on the rear floor, so as to increase the strength of the rear floor.

[0014] Thanks to the above technical solutions, the present application has the following beneficial effects:

[0015] 1. The traditional new energy commercial vehicle floor under the arrangement of cooling liquid filling tank and all-in-one control box, when arranging, need to occupy the space under the floor, thereby limiting the expansion of the space of the cab in the vertical direction; At the same time, the cooling liquid filling tank needs to be filled with cooling liquid regularly, or the all-in-one control box needs to be repaired, when the cooling liquid filling tank is filled with cooling liquid or the all-in-one control box is repaired, the cab needs to be turned over, or a repair opening is opened on the rear floor, the repair opening is opened during repair, and the repair opening is closed when not needed. The way of turning over the cab needs to set up suspension and locking system between the floor assembly and the frame, and at the same time, all the articles in the cab will be affected by the turning over during the process of turning over the cab; The way of starting the repair opening will reduce the strength of the rear floor. The cooling liquid filling tank and all-in-one control box originally located under the rear floor are transferred to the outside of the frame, on the one hand, a certain space is emptied under the rear floor, so that the plane where the rear floor is located can be lowered, after the plane where the rear floor is located is lowered, the vertical space above the rear floor is increased, so that the vertical space of the main driver seat installation position and the copilot seat installation position is increased, which also makes the selection of the cab seat have more selection space. On the other hand, after the cooling liquid filling tank and all-in-one control box are transferred to the outside of the frame, the cooling liquid filling tank can be directly filled with cooling liquid on the outside of the frame, and the all-in-one control box can be repaired and maintained, so that the cab does not need to be turned over or the repair opening is opened on the rear floor.

[0016] 2. As a preferred embodiment of the present application, the height of the rear floor is lowered, thereby reducing the height difference between the front floor and the rear floor, the left longitudinal beam and the right longitudinal beam located under the front floor and the rear floor are also changed, specifically, the height difference between the front section of the left longitudinal beam and the rear section of the left longitudinal beam is reduced, and the height difference between the front section of the right longitudinal beam and the rear section of the right longitudinal beam is also reduced, so that the trend of the left longitudinal beam and the right longitudinal beam is more gentle, when the cab is stressed, the force transmission of the left longitudinal beam and the right longitudinal beam is more smooth, thereby improving the crashworthiness of the cab.

[0017] 3. As a preferred embodiment of the present application, the increase of the vertical height of the main driver seat installation position and the copilot seat installation position provides more selectivity for the seat, the main driver seat installation position can select a large-stroke airbag seat which occupies more space, thereby improving the driving comfort of the driver and relieving the driving fatigue of the driver, at the same time, the copilot seat installation position can also select a large-stroke airbag seat or a longer double folding seat, by using the folding function of the double folding seat, the double folding seat and the seat of the main driver can be matched to form a bed for the driver to rest when resting.

[0018] 4. As a preferred embodiment of the present application, after the rear floor is made into a flat floor, the space left can provide more possibilities for the interior decoration of the cab, so as to meet the different needs of the driver, such as setting a storage box between the driver seat and the front passenger seat, or setting an electric refrigerator and the like. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0020] Figure 1 A schematic view of the floor assembly of an embodiment of the present application;

[0021] Figure 2 A schematic view of the longitudinal section of the rear floor of an embodiment of the present application compared with a conventional rear floor;

[0022] Figure 3 A schematic view of the floor assembly and the frame of an embodiment of the present application from the top;

[0023] Figure 4 A schematic view of the left longitudinal beam of an embodiment of the present application compared with a conventional left longitudinal beam;

[0024] Figure 5 A schematic view of the floor assembly of an embodiment of the present application;

[0025] Figure 6 A schematic view of the floor assembly of an embodiment of the present application;

[0026] Figure 7 A schematic view of the floor assembly of an embodiment of the present application; Figure 6 A schematic view of the longitudinal section of the rear floor of an embodiment of the present application compared with a conventional rear floor;

[0027] Figure 8 A schematic view of the floor assembly of an embodiment of the present application;

[0028] Figure 9 A schematic view of the seat matching structure of the rear floor of an embodiment of the present application;

[0029] Figure 10 A schematic view of the seat matching structure of the rear floor of another embodiment of the present application;

[0030] Reference signs:

[0031] 1, floor assembly; 11, front floor; 12, rear floor; 121, main driver seat installation position; 122, co-driver seat installation position; 123, first seat installation support; 124, second seat installation support; 125, large-stroke airbag seat; 126, double folding seat; 127, reinforcing rib;

[0032] 13, left rear pillar inner panel; 14, right rear pillar inner panel; 15, left rocker inner panel; 16, right rocker inner panel; 17, floor skeleton; 171, left longitudinal beam; 1711, left longitudinal beam front section; 1712, left longitudinal beam rear section; 172, right longitudinal beam; 1721, right longitudinal beam front section; 1722, right longitudinal beam rear section; 173, front cross beam; 174, rear cross beam; 175, rear reinforcing cross beam; 176, seat support plate; 177, seat fixing nut plate;

[0033] 2, frame;

[0034] 3, coolant filling tank;

[0035] 4, all-in-one control box. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0037] In the following description, a number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in other ways different from those described herein, and therefore, the scope of the present application is not limited to the specific embodiments disclosed below.

[0038] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of the present specification, the description referring to the terms "embodiment", "example", "one embodiment", "exemplary" or "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0041] According to one embodiment of the present application, as Figure 1 , Figure 3 , Figure 5 A new energy commercial vehicle flat floor includes a floor assembly 1 and a frame 2, the floor assembly 1 has a front floor 11 and a rear floor 12, the rear floor 12 is a flat floor, and the rear floor 12 has a main driver seat installation position 121 and a co-driver seat installation position 122. It can be understood that the bulge existing in the middle of the traditional rear floor 12 will occupy a certain cab space, and in the present embodiment, the rear floor 12 is used as a flat floor, thereby effectively increasing the cab space. After increasing the cab space, more options can be provided for the selection and matching of the interior decoration in the cab. For example, according to the needs of the driver, a storage box can be configured between the main driver seat installation position 121 and the co-driver seat installation position 122 of the rear floor 12 to store some food, clothes, medicine, etc.

[0042] Or configure a vehicle-mounted refrigerator, etc.

[0043] Optionally, as Figure 2 , Figure 3As shown, the cooling liquid filling tank 3 and the all-in-one control tank 4 located below the rear floor 12 are transferred to the vehicle frame 2, so as to reduce the height of the plane where the rear floor 12 is located, and increase the vertical space of the main driver seat installation position 121 and the co-driver seat installation position 122. The vehicle frame 2 is a frame structure of the vehicle. Specifically, the cooling liquid filling tank 3 and the all-in-one control tank 4 are arranged below the floor of the conventional new energy commercial vehicle. On the one hand, the cooling liquid filling tank 3 and the all-in-one control tank 4 need to occupy the space below the floor, and on the other hand, the cooling liquid filling tank 3 needs to be filled with cooling liquid regularly, or the all-in-one control tank 4 needs to be repaired. When the cooling liquid filling tank 3 is filled with cooling liquid or the all-in-one control tank 4 is repaired, the cab needs to be flipped or a repair opening needs to be formed on the rear floor 12. The flipping mode needs to set a suspension and locking system between the floor assembly 1 and the vehicle frame 2, and during the flipping process, all the articles in the cab will be affected by the flipping. The repair opening mode will reduce the strength of the rear floor 12, and after the repair opening is formed, the structure of the rear floor 12 is more complex, which means that more forming steps are needed in the forming process of the rear floor 12, thereby increasing the production cost. After the repair opening is formed, the sealing problem of the repair opening and the bearing effect problem of the repair opening cover need to be ensured. If the bearing capacity of the repair opening cover is insufficient, there may be safety hazards, causing damage to the repair opening cover and threatening the personal safety of the cab operators. In the embodiment, the cooling liquid filling tank 3 and the all-in-one control tank 4 originally located below the rear floor 12 are transferred to the outside of the vehicle frame 2. On the one hand, a certain space is emptied below the rear floor 12, so that the plane where the rear floor 12 is located can be lowered, and the lowering height is shown in Figure 2 The height of the rear floor 12 in the embodiment is lowered by H1 compared with the height of the conventional rear floor 12, and the original drum of the rear floor 12 is made into a flat floor, which is lowered by H2 compared with the height of the conventional rear floor 12. After the plane where the rear floor 12 is located is lowered, the vertical space above the rear floor 12 is increased, so that the vertical space of the main driver seat installation position 121 and the co-driver seat installation position 122 is increased. On the other hand, after the cooling liquid filling tank 3 and the all-in-one control tank 4 are transferred to the outside of the vehicle frame 2, the cooling liquid filling tank 3 can be directly filled with cooling liquid, and the all-in-one control tank 4 can be directly repaired and maintained, so that the cab does not need to be flipped or the repair opening does not need to be formed on the rear floor 12.

[0044] Optionally, the cooling liquid filling tank 3 can be arranged close to the all-in-one control tank 4 or separately from the all-in-one control tank 4. The cooling liquid filling tank 3 is arranged close to the cab, so as to facilitate the supply of cooling liquid to the radiator. Meanwhile, the all-in-one control tank 4 can also be arranged close to the cab, so as to reduce the line length of the all-in-one control tank 4. In addition, after the cooling liquid filling tank 3 and the all-in-one control tank 4 are transferred to the outside of the frame 2, protective shells are arranged on the outer surfaces of the cooling liquid filling tank 3 and the all-in-one control tank 4 for protection. Meanwhile, maintenance covers are arranged on the protective shells, which are opened when maintenance or cooling liquid filling is performed and closed when no maintenance is performed.

[0045] According to one embodiment of the present application, as shown in Figure 9 、 Figure 10 , the main driver seat installation position 121 and the co-driver seat installation position 122 have more seat selection after the vertical space is increased, and the rear floor 12 is a flat floor, so that the length of the seat also has more selection. The main driver seat installation position 121 and the co-driver seat installation position 122 are respectively connected with the first seat installation support 123 and the second seat installation support 124, and the first seat installation support 123 and the second seat installation support 124 have different heights to adapt to the seats with different vertical space installation requirements. Specifically, the first seat installation support 123 and the second seat installation support 124 can be made with different heights according to different installation space requirements of the seat installation, so as to compensate for the height. Alternatively, the seat installation support with height adjustment function can be selected, and the seat installation support is adjusted to the required height according to the different installation space requirements of the seat installation, so as to compensate for the height.

[0046] In the selection of the seat, the embodiment provides the following two seat setting modes:

[0047] Mode one:

[0048] As shown in Figure 9 , the first seat installation support 123 and the second seat installation support 124 are respectively connected with the large-stroke airbag seat 125. Since the stroke of the airbag of the large-stroke airbag seat 125 is large, the vertical space required during installation is also large. Therefore, when the large-stroke airbag seat 125 is arranged on the first seat installation support 123 and the second seat installation support 124, the first seat installation support 123 and the second seat installation support 124 should not occupy a large vertical space.

[0049] Mode two:

[0050] As shown in Figure 10As shown, the first seat mounting bracket 123 is connected with a large-stroke airbag seat 125, and the second seat mounting bracket 124 is connected with a double folding seat 126, and the cushion of the double folding seat 126 is located at the same horizontal plane as the cushion of the large-stroke airbag seat 125, so that the double folding seat 126 and the large-stroke airbag seat 125 are connected as a whole. Since the double folding seat 126 needs less vertical space during installation than the large-stroke airbag seat 125, in order to ensure that the cushions of the double folding seat 126 and the large-stroke airbag seat 125 are located at the same horizontal line, the second seat mounting bracket 124 needs to compensate for the vertical height. After the cushions of the double folding seat 126 and the large-stroke airbag seat 125 are located at the same horizontal line, the double folding seat 126 and the large-stroke airbag seat 125 can be connected as a whole, thereby forming a bed structure for the driver to rest, meeting the needs of the driver to rest in the service area or when the vehicle is parked.

[0051] It can be understood that, due to the increase in vertical space of the main driver seat mounting position 121 and the co-driver seat mounting position 122, more choices of seats can be made by cooperating with the first seat mounting bracket 123 and the second seat mounting bracket 124.

[0052] According to an embodiment of the present application, as shown in Figure 5 The floor assembly 1 also has a left rear upright inner plate 13 and a right rear upright inner plate 14 welded on the left and right sides of the rear floor 12, a left rocker inner plate 15 and a right rocker inner plate 16 welded on the left and right sides of the front floor 11, and a floor skeleton 17 welded below the front floor 11 and the rear floor 12. The welding mode can increase the stability of cooperation, make the connection more firm, and can be used as a whole, thereby increasing the strength and enabling the cab to have stronger pressure-bearing capacity and reduce deformation when the cab is impacted or collided.

[0053] Specifically, as shown in Figure 6 The floor skeleton 17 includes a left longitudinal beam 171, a right longitudinal beam 172, a front transverse beam 173, and a rear transverse beam 174 forming a support frame. The left longitudinal beam 171 and the right longitudinal beam 172 respectively have a left longitudinal beam front segment 1711 and a right longitudinal beam front segment 1721 below the front floor 11, and a left longitudinal beam rear segment 1712 and a right longitudinal beam rear segment 1722 below the rear floor 12. As shown in Figure 4As shown, since the height of the rear floor 12 is lowered by the height of H1, the height of the rear section of the left longitudinal beam 1712 and the rear section of the right longitudinal beam 1722 of the left longitudinal beam 171 and the right longitudinal beam 172 of the present embodiment is also lowered by the height of H1 compared with the conventional left longitudinal beam 171 and the right longitudinal beam 172, so that the height difference between the front section of the left longitudinal beam 1711 and the rear section of the left longitudinal beam 1712, and the front section of the right longitudinal beam 1721 and the rear section of the right longitudinal beam 1722 is lowered, the trend of the left longitudinal beam 171 and the right longitudinal beam 172 is more gentle, and when the cab is stressed, the force transmission of the left longitudinal beam 171 and the right longitudinal beam 172 is more smooth, thereby improving the crashworthiness of the cab.

[0054] Optionally, the rear reinforcing cross beam 175 is connected between the left longitudinal beam 171 and the right longitudinal beam 172, and the rear reinforcing cross beam 175 is close to the rear cross beam 174. Since the cab seat is provided on the rear floor 12, the driver needs to sit on the cab seat in the cab, so that the stress of the floor assembly 1 is mainly concentrated on the rear floor 12, and the rear reinforcing cross beam 175 close to the rear cross beam 174 can increase the strength of the rear floor 12.

[0055] Optionally, the reinforcing ribs 127 are formed on the rear floor 12 to increase the strength of the rear floor 12. The reinforcing ribs 127 can be provided as concave ribs or convex ribs. When the reinforcing ribs 127 are provided as convex ribs, they can be similar to an arch bridge or a continuous arch bridge when stressed, facilitating force transmission, so that the rear floor has greater load bearing capacity and better anti-deformation performance.

[0056] According to one embodiment of the present application, as shown in Figure 6 , Figure 7 , Figure 8 As shown, the seat fixing nut plate 177 is provided between the floor framework 17 and the rear floor 12, so that the seat fixing nut plate 177 is supported by the floor framework 17. The seat fixing nut plate 177 has nut holes for installing seats, and the seats can be fixed on the rear floor 12 by using bolts. It can be understood that after the height of the rear floor 12 of the present application is lowered, different cab seats can be selected according to the needs of the driver, and the nut hole types required by different cab seats are not necessarily the same when assembled. At the same time, the length, width and stress of the seat need to be considered when installing the seat, which also leads to the fact that the positions of the nut holes are not necessarily the same when installing. Therefore, different nut holes for installing seats of different types need to be reserved on the seat fixing nut plate 177, such as a and b in Figure 6 which represent nut holes of different types and positions, respectively, and are located on the main driver seat mounting position 121, so that the main driver seat mounting position 121 can be connected to at least two different seats, such as a common seat and a large-stroke airbag seat 125.

[0057] Meanwhile, since the rear floor 12 is a flat floor, the main driver seat installation position 121 and the co-driver seat installation position 122 are located on the same horizontal plane, so that the co-driver seat installation position can be provided with a long double seat, and since the double seat has a large span, in the process of fixing the seat, in addition to the support in the vertical direction, the seat can be pulled in the horizontal direction by a bracket, as shown in Figure 7 The seat support plate 176 is connected to the rear cross beam 174, and the support plate is also provided with nut holes, Figure 7 and Figure 8 wherein d respectively represents the nut holes for fixing the seat in the vertical direction and the horizontal direction. Meanwhile, the co-driver seat installation position can also need to be configured with a large-stroke airbag seat or a general seat, in order to facilitate the assembly of other seats, and other types of nut holes are reserved, as shown in Figure 8 c. Of course, Figure 6 , Figure 7 , Figure 8 The positions of the nut holes of different types and positions represented by a, b, c, and d in

[0058] The places not mentioned in the present application can be realized by using or referring to the existing technology.

[0059] Each embodiment in the specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other. Each embodiment mainly describes the differences from other embodiments.

[0060] The above only describes the embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A new energy commercial vehicle flat floor, comprising a floor assembly and a vehicle frame, characterized in that, The floor assembly has a front floor and a rear floor, the rear floor is a flat floor, the rear floor has a main driver seat installation position and a co-driver seat installation position, the cooling liquid filling tank and the all-in-one control box under the rear floor are transferred to the frame, so as to reduce the height of the plane where the rear floor is located, and the vertical space of the main driver seat installation position and the co-driver seat installation position is increased; the first seat installation support and the second seat installation support are respectively connected above the main driver seat installation position and the co-driver seat installation position. The floor assembly also has left and right rear upright inner plates welded on the left and right sides of the rear floor, left and right door sill inner plates welded on the left and right sides of the front floor, and a floor framework welded below the front floor and the rear floor, so as to increase the strength of the front floor and the rear floor.

2. The new energy commercial vehicle flat floor according to claim 1, characterized in that, The first seat installation support and the second seat installation support have different heights, so as to adapt to the installation requirements of seats with different vertical spaces.

3. The new energy commercial vehicle flat floor according to claim 2, characterized in that, The first seat installation support and the second seat installation support are respectively connected with large-stroke airbag seats.

4. The new energy commercial vehicle flat floor according to claim 2, characterized in that, The first seat installation support is connected with a large-stroke airbag seat, and the second seat installation support is connected with a double-person folding seat, and the seat cushion of the large-stroke airbag seat and the seat cushion of the double-person folding seat are located on the same horizontal plane, so that the double-person folding seat and the large-stroke airbag seat are connected in an integrated manner.

5. The new energy commercial vehicle flat floor according to claim 1, characterized in that, The floor framework includes left and right longitudinal beams, a front cross beam and a rear cross beam which form a support frame, the left longitudinal beam and the right longitudinal beam respectively have a left longitudinal beam front segment and a right longitudinal beam front segment below the front floor, and a left longitudinal beam rear segment and a right longitudinal beam rear segment below the rear floor, and the height difference between the left longitudinal beam front segment and the left longitudinal beam rear segment and the right longitudinal beam front segment and the right longitudinal beam rear segment is reduced.

6. The new energy commercial vehicle flat floor according to claim 5, characterized in that, The left longitudinal beam and the right longitudinal beam are connected with a rear reinforcing cross beam, and the rear reinforcing cross beam is close to the rear cross beam, so as to increase the strength of the rear floor.

7. The new energy commercial vehicle flat floor according to claim 5, characterized in that, The rear cross beam is connected with a seat support plate.

8. The new energy commercial vehicle flat floor according to claim 1, characterized in that, A seat fixing nut plate is arranged between the floor framework and the rear floor, so as to support the seat fixing nut plate through the floor framework.

9. The new energy commercial vehicle flat floor according to claim 1, characterized in that, The rear floor is formed with a reinforcing rib, so as to increase the strength of the rear floor.

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