WO2019185022A1 - Front floor assembly and automobile - Google Patents

Abstract

A front floor assembly (100) and an automobile (200). The front floor assembly (100) comprises a connecting plate (4) and a battery pack, and the battery pack comprises a battery pack sealing cover (1) and a battery tray (2). A sealed space for accommodating a battery module is formed between the battery pack sealing cover (1) and the battery tray (2), a notch (41) is provided on the connecting plate (4), and the battery pack is provided at the position of the notch (41). The top edge of the battery pack sealing cover (1) is connected to an inner side of the connecting plate (4) and covers the notch (41) to form the front floor.

Description

Front floor assembly and car

Cross-reference to related applications

The present application is based on a Chinese patent application No. 201 810 279 529, the disclosure of which is hereby incorporated by reference.

Technical field

The present disclosure belongs to the field of new energy automobile technology, and in particular relates to a front floor assembly and an automobile.

Background technique

The existing front floor of the automobile is usually a sheet metal panel structure, and is welded to the floor skeleton as an assembly on the welding line. As a part of the body-in-white, it is an important part of the seal of the passenger compartment.

In the related art, the front cover of the automobile and the sealing cover of the battery pack are two independent parts, and there is a matching gap requirement between the two, and a reserved gap of 10 mm to 20 mm is required to avoid interference or abnormal noise, and this structure sacrifices Z. The height to the (vehicle height) causes space waste, resulting in tight layout space and low space utilization.

Moreover, due to the general layout requirements, the front floor often needs to provide mounting points for many modules, but due to the limitation of the sheet metal stamping process, only the form of split small bracket welding can be used. This type of front floor assembly, on the one hand, adds to the welding process; on the other hand, it also results in a greater weight of the front floor assembly.

Summary of the invention

The technical problem to be solved by the present disclosure is to provide a front floor assembly and an automobile for the problem that the existing front floor assembly has a large weight.

In order to solve the above technical problem, in one aspect, an embodiment of the present disclosure provides a front floor assembly including a connecting plate and a battery pack, the battery pack including a battery pack sealing cover and a battery tray, the battery pack sealing cover and the battery tray Forming a sealed space for accommodating the battery module, the connecting plate is provided with a notch, the battery pack is disposed at the notch position, and a top edge of the battery pack sealing cover is connected to the inner side of the connecting plate and covered The gap is formed to form a front floor.

In the front floor assembly provided by the embodiment of the present disclosure, the connecting plate is provided with a notch, and the battery pack is disposed at the notch position, and the top edge of the battery pack sealing cover of the battery pack is connected to the inner side of the connecting plate and covers the notch to form the front floor. In this way, it is equivalent to scooping a gap on the front surface of the conventional monolith, the gap is covered by the battery pack sealing cover, and the battery pack sealing cover and the connecting plate are combined to form the front floor, and the battery pack sealing cover is a part of the front floor. It is equivalent to combining the traditional front floor and the battery pack sealing cover, saving the Z-direction space of 10-20mm between the traditional front floor and the battery pack sealing cover, which is equivalent to the overall lifting of the battery pack and increases the bodywork. The ground clearance improves the road passability of the vehicle and improves the space utilization, alleviating the total arrangement pressure and reducing the weight of the front floor assembly. In addition, since the Z-direction space of 10-20 mm is saved, the battery pack mounting beam (for example, the front floor lower rail) can be lowered with the lifting of the battery pack to lower the design height, so that the battery pack mounting beam can be designed to be lighter in weight. Further reduce the weight of the front floor assembly.

In another aspect, an embodiment of the present disclosure also provides an automobile including the front floor assembly described above.

DRAWINGS

1 is a perspective view of a front floor assembly according to an embodiment of the present disclosure;

2 is an exploded view of a front floor assembly according to an embodiment of the present disclosure;

3 is a top plan view of a front floor assembly according to an embodiment of the present disclosure;

4 is a partial cross-sectional view of a front floor assembly according to an embodiment of the present disclosure;

Figure 5 is an enlarged view of a portion A in Figure 4;

6 is a partial cross-sectional view of a front floor assembly according to another embodiment of the present disclosure;

Figure 7 is an enlarged view of B in Figure 6;

8 is a schematic view showing the connection between a front floor and a vehicle body according to an embodiment of the present disclosure;

9 is a simplified schematic diagram of a car according to an embodiment of the present disclosure;

Figure 10 is a simplified schematic illustration of a web provided by an embodiment of the present disclosure.

The reference numerals in the manual are as follows:

1. Battery pack sealing cover; 11, top cover; 12, side cover; 121, second flange; 122, third flange;

2, battery tray; 21, battery tray panel; 211, first flange; 22, mounting plate;

3. Mounting nut;

4, the connecting plate; 41, the gap;

5, the front under the vertical beam; 51, the outer turn; 52, the inner turn;

6, the seal;

7. The central channel is installed with studs;

8. The power amplifier module is installed with studs;

9. The battery module is installed with studs;

10. Harness mounting studs;

20, the air duct installation stud;

30. Sheet metal mounting plate studs;

40. Sealing cover connecting plate;

50. Install the beam in front of the front seat;

60. Install the beam behind the front seat;

70, left threshold;

80, the right threshold;

100, front floor assembly;

200, car.

detailed description

The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure.

In the description of the present disclosure, it is to be understood that the orientation or positional relationship of "upper", "lower", "front", "back", "left", "right", "top", "bottom", etc. It is based on the position of the car itself. For example, the “up” and “down” directions and the “top” and “bottom” directions refer to the vehicle height direction of the automobile, that is, the Z direction shown in FIG. 2, and the “front” and “rear” directions refer to the vehicle length direction of the automobile. , that is, the X direction shown in FIG. 2, the "left" and "right" directions refer to the vehicle width direction of the automobile, that is, the Y direction shown in FIG. 2, and the "inside" and "outside" directions refer to the vehicle along the vehicle. Inside, or in the direction of extending outside the car.

The designer of the present application has learned that the existing electric vehicle battery pack sealing cover is mostly formed of composite material or aluminum alloy, and the battery module package is sealed by the battery pack sealing cover and the battery tray to form an integral form of the battery pack, the battery pack. It is then supplied to the assembly line for assembly with the body. For safety reasons, the battery pack must be protected from water, and the battery pack sealing cover is sealed with the battery tray to form a battery pack seal. Some front floor assemblies 100 of embodiments of the present disclosure will be described below in conjunction with the drawings.

As shown in FIG. 1 to FIG. 4, an embodiment of the present disclosure provides a front floor assembly 100 including a connecting plate 4 and a battery pack. The battery pack includes a battery pack sealing cover 1 and a battery tray 2, and a sealed space for accommodating the battery module is formed between the battery pack sealing cover 1 and the battery tray 2. As shown in FIG. 10, the connecting plate 4 is provided with a notch 41. The battery pack is disposed at the position of the notch 41. The top edge of the battery pack sealing cover 1 is connected to the inner side of the connecting plate 4 and covered. The notch 41 is formed to form a front floor.

The battery pack sealing cover 1 includes a top cover 11 and a side cover 12 surrounding the outer edge of the top cover 11 , and a top side of the side cover 12 is connected outside the top cover 11 Below the edge, the bottom side of the side cover 12 is attached to the outer edge of the battery tray 2. The top cover 11 is both a part of the battery pack sealing cover 1 and a part of the front floor.

Thus, it is equivalent to scooping a notch on the front surface of the conventional monolith, the notch is covered by the battery pack sealing cover 1, and the battery pack sealing cover 1 and the connecting plate 4 are combined to form the front floor, and the battery pack sealing cover 1 is front. Part of the floor is equivalent to combining the traditional front floor and the battery pack sealing cover, saving the Z-direction space of 10-20mm between the traditional front floor and the battery pack sealing cover, which is equivalent to the overall lifting of the battery pack. The ground clearance of the vehicle body is increased, the road passing property of the vehicle is improved, the space utilization rate is improved, the total arrangement pressure is alleviated, and the weight of the front floor assembly 100 is reduced. In addition, since the Z-direction space of 10-20 mm is saved, the battery pack mounting beam (for example, the front floor lower rail) can be lowered with the lifting of the battery pack to lower the design height, so that the battery pack mounting beam can be designed to be lighter in weight. The weight of the front floor assembly 100 is further reduced.

In an embodiment, the top cover 11 is an integrally formed composite panel. The material of the composite panel may be SMC (Sheet Molding Compound) or reinforced fiber composite sheet (such as glass fiber composite sheet and aramid fiber composite sheet). The composite panel can reduce the weight of the battery pack sealing cover 1 while meeting the strength requirements.

In one embodiment, the side cover 12 is a stamped sheet metal member corresponding to the top cover 11 in the form of a composite panel. As shown in FIG. 2 and FIG. 4, the battery tray 2 includes a battery tray panel 21 that is recessed downward. The top side edge of the battery tray panel 21 is outwardly bent to form a first flange 211. The bottom side edge of the 12 is bent outward to form a second flange 121, and the second flange 121 is sealingly coupled to the upper surface of the first flange 211. The top side edge of the side cover 12 is bent inwardly to form a third flange 122, and the third flange 122 is sealingly connected to the lower surface of the top cover 11 by gluing.

The specific connection form of the second flange 121 and the first flange 211 may be welding, gluing, bolting, or the like. Preferably, the bonding effect is enhanced while the bonding strength is enhanced by the combination of the adhesive and the bolt connection. Through the connection of the second flange 121 and the first flange 211, the overlapping area of the battery tray panel 21 and the side cover 12 can be increased, and the connection strength can be increased. Similarly, by connecting the third flange 122 to the lower surface of the top cover 11, the overlapping area of the top cover 11 and the side cover 12 can be increased, and the connection strength can be increased.

In an embodiment, as shown in FIG. 2 to FIG. 4, the outer edge of the top cover 11 is fixedly connected with a mounting nut 3 for connecting the battery pack sealing cover 1 to the vehicle body, and the mounting nut 3 A plurality of outer edges are provided around the top cover 11. Preferably, the mounting nut 3 is a rivet nut that is riveted to the outer edge of the top cover 11. The front floor assembly 100 can be attached to the body by bolts that match the mounting nut 3.

In an embodiment, as shown in FIG. 4, the front floor assembly 100 further includes a front floor lower side member 5, and the top of the front floor lower side member 5 is fixedly connected to the connecting plate 4 by welding or the like. The inner edge of the connecting plate 4 overlaps the outer edge of the top cover 11 , and the inner edge of the connecting plate 4 and the outer edge of the top cover 5 are press-fitted with a sealing member. 6. Here, the press fitting refers to an assembly process of pressing the two parts having the interference fit to the mating position, so it can be understood that the seal 6 is interference fit on the inner side edge of the connecting plate 4 and the outer side of the top cover 5 The same is true for the case where the other parts are involved in the case of press fitting.

Alternatively, the seal 6 may be a sealed foam or seal or the like. The seal 6 isolates the front floor (top cover 11) from the bottom to ensure the seal of the passenger compartment. Here, the front floor assembly 100 is attached to the vehicle body by means of a mounting nut 3 and a bolt, and the first is easy to install (the bolt can be easily screwed into the mounting nut 3 from above); the second is that the bolt can be tightly sealed after being fastened. Piece 6, to achieve a good seal.

Figure 8 shows the mounting position of the front floor on the vehicle body. As shown in FIG. 8 , the connecting plate 4 is disposed around the top cover 11 , that is, the inner edge of the connecting plate 4 is fixedly connected with the outer edge of the top cover 11 , and the front seat is fixedly connected to the connecting plate 4 and the top cover 11 . The front mounting beam 50 and the front seat rear mounting beam 60, the two ends of the front seat front mounting beam 50 are fixedly connected to the left door sill 70 and the right sill 80, respectively, and the two ends of the front seat rear mounting beam 50 are fixedly connected The left threshold 70 and the right threshold 80 are on. Thus, the front seat front mounting cross member 50 and the front seat rear mounting cross member 60 can be used for the installation and reinforcement of the battery pack in addition to the front seat mounting. Moreover, the connection of the connecting plate 4 to the top cover 11 can be further enhanced.

In an embodiment, as shown in FIG. 4, the battery tray 2 further includes a fixed connection to the battery tray panel 21 by welding or bolting, and outwardly protruding the outer edge of the battery tray panel 21. The mounting plate 22 is fixedly attached to the bottom of the front floor lower side member 5 by welding or bolting. The mounting plate 22 can also function to enhance the strength of the battery tray panel 21 while connecting the battery tray 2 to the front floor lower side member 5.

In an embodiment, as shown in FIG. 4 and FIG. 5, the top opening sides of the front floor side rail 5 respectively form an outer flange 51 and an inner flange 52, and the outer flange 51 and the inner flange 52 is fixedly attached to the lower surface of the connecting plate 4 by welding or gluing, and the sealing member 6 is press-fitted between the inner flange 52 and the outer edge of the top cover 11. The sealing member 6 has a large contact area with the inner flange 52 and the top cover 11 on both sides, and the sealing effect is better.

In an embodiment, as shown in FIG. 1 and FIG. 2, the front floor assembly 100 further includes a central passage mounting stud 7 for mounting the auxiliary instrument panel and the shifting mechanism mounting bracket for mounting the power amplifier module. Power amplifier module mounting stud 8, battery module mounting stud 9 for mounting battery module, wiring harness mounting stud 10 for mounting automotive wiring harness 200, duct mounting stud 20 for installing air conditioning duct and for mounting The sheet metal mounting stud 30 of the sheet metal shield of the air conditioning duct, the central channel mounting stud 7, the power module mounting stud 8, the battery module mounting stud 9, the harness mounting stud 10, the duct installation The stud 20 and the sheet metal guard mounting stud 30 are integrally formed in the top cover 11 . That is, the central channel mounting stud 7, the power amplifier module mounting stud 8, the battery module mounting stud 9, the wire harness mounting stud 10, the air duct mounting stud 20, and the sheet metal guard mounting stud 30 and the composite panel The top cover 11 of the form is integrally formed.

Specifically, as shown in FIG. 1, based on the front floor (top cover 11) of the composite panel, the central passage on the existing front floor assembly 100 is replaced by five central passage mounting studs 7 as Mounting points are provided by the auxiliary instrument panel and the shifting mechanism mounting bracket. The power amplifier mounting bracket on the existing front floor assembly 100 is replaced by two power amplifier module mounting studs 8 to provide a mounting point for the power amplifier module. The battery mounting bracket on the existing front floor assembly 100 is replaced by two battery module mounting studs 9 to provide a mounting point for the battery module. A plurality of weld bolt brackets and end face welding bolts on the existing front floor assembly 100 are replaced by one harness mounting stud 10, four duct mounting studs 20 and three sheet metal guard studs 30. This provides installation points for a number of general layout modules such as wire harnesses, air conditioning ducts, and sheet metal shields for air conditioning ducts.

In an embodiment, as shown in FIG. 1 and FIG. 2, the upper portion of the top cover 11 is divided into a front mounting area FA, a middle mounting area MA and a rear mounting area BA from front to back; the central passage The mounting stud 7 is disposed at an intermediate position of the front mounting area FA, and the power amplifier module mounting stud 8 and the harness mounting stud 10 are disposed on the left side of the middle mounting area MA, and the battery module is installed The stud 9 and the sheet metal guard mounting stud 30 are disposed on the right side of the middle mounting area MA, and the duct mounting stud 20 is disposed at an intermediate position of the rear mounting area BA.

Thus, the central channel mounting stud 7, the power amplifier module mounting stud 8, the battery module mounting stud 9, the wire harness mounting stud 10, and the air duct mounting are integrally formed in the top cover 11 in the form of a composite panel. The stud 20 and the sheet metal guard mounting stud 30 can replace the sheet metal bracket at the corresponding position in the prior art, and do not need welding, which reduces the welding process, reduces the weight of the vehicle body, and improves the weight reduction factor of the vehicle body.

In a certain model, the front floor assembly 100 of the embodiment of the present disclosure has an overall weight of the battery pack sealing cover of 18.493 Kg, while the conventional battery pack sealing cover and the front floor have a total weight of 23.926 Kg, which is equivalent to a weight reduction of 5.433. Kg.

In addition, since the front floor assembly 100 of the embodiment of the present disclosure saves a Z-direction space of 10 mm to 20 mm, the battery pack mounting beam (for example, the front floor lower rail) can be matched with a battery pack (including a battery pack sealing cover, a battery tray, and The battery module is lifted up to lower the design height, so that the battery pack mounting beam can be designed to be lighter in weight, further reducing the weight of the front floor assembly 100. The use of a top cover in the form of a composite panel and the replacement of individual sheet metal supports have a significant contribution to the weight reduction of the body, resulting in a weight reduction of 22.7% for the front floor assembly 100.

Referring to Figures 6 and 7, another embodiment of the present disclosure provides a front floor assembly 100. The difference from the embodiment shown in FIG. 4 is that, in this embodiment, the battery pack sealing cover 1 is an integrally formed sheet metal member, that is, the top cover 11 and the side cover 12 are integrally formed. For example, a DC01 material having a thickness of 0.7 mm can be formed by press forming. At this time, due to the limitation of the stamping process, the upper surface areas of the battery pack sealing cover 1 are respectively welded with the respective sheet metal brackets.

In this embodiment, as shown in FIG. 6, the battery tray 2 includes a battery tray panel 21 that is recessed downward, and a top side edge of the battery tray panel 21 is outwardly bent to form a first flange 211. The bottom side edge of the side cover 12 is bent outward to form a second flange 121, and the second flange 121 is sealingly connected to the upper surface of the first flange 211.

In this embodiment, as shown in FIGS. 6 and 7, the battery tray 2 further includes a battery tray panel 21 that is fixedly attached to the battery tray panel 21 by welding or bolting, and protrudes outward. Mounting plate 22 for the outer edge. The front floor assembly 100 further includes a front floor lower side rail 5 and a sealing cover connecting plate 40, and the top of the front floor lower side member 5 is fixedly connected under the connecting plate 4 by welding or the like, the mounting The plate 22 is fixedly connected to the bottom of the front floor lower side member 5 by welding or bolting, etc., and the inner side edge of the sealing cover connecting plate 40 is fixedly attached to the outer edge of the top cover 11 by gluing or the like. Upper side, the inner edge of the connecting plate 4 is overlapped above the sealing cover connecting plate 40, and a sealing member 6 is press-fitted between the inner edge of the connecting plate 4 and the sealing cover connecting plate 40. The seal 6 can be a sealed foam or a sealing ring or the like. The seal 6 isolates the front floor (top cover 11) from the bottom to ensure the seal of the passenger compartment.

In an embodiment, as shown in FIG. 6 and FIG. 7 , both sides of the top opening of the front floor lower side member 5 respectively form an outer flange 51 and an inner flange 52, and the outer flange 51 and the inner flange 52 is fixedly attached to the lower surface of the connecting plate 4 by welding or gluing, and the sealing member 6 is press-fitted between the inner flange 52 and the sealing cover connecting plate 40. In this embodiment, since the battery pack sealing cover 1 is an integrally formed sheet metal member, the connection between the top cover 11 and the side cover 12 is no longer formed as a flange, in order to realize the top cover 11 and the connecting plate 4 And the connection of the inner flange 52 of the front floor lower rail 5 is provided with a sealing cover connecting plate 40, and the sealing cover connecting plate 40 connects the battery pack sealing cover 1 and the connecting plate 4 and the inner flange 52 of the front floor side sill 5 connect them.

Moreover, in other embodiments, the battery pack sealing cover may also be an integrally formed composite panel. Alternatively, the top cover and the side cover of the battery pack sealing cover are two parts, and both of the parts may be composite materials or may be sheet metal parts.

The commonality of these embodiments is that the top cover portions of the battery pack sealing cover constitute the front floor (used as the front floor), and the carpet is directly laid over the top cover of the battery pack sealing cover.

In addition, as shown in FIG. 9, an embodiment of the present disclosure further provides an automobile 200 including the front floor assembly 100 of the above embodiment.

The automobile 200 provided in this embodiment increases the ground clearance of the vehicle body, improves the road passing property, improves the space utilization rate, alleviates the total arrangement pressure, and reduces the weight of the front floor assembly 100. In addition, since the Z-direction space of 10 mm to 20 mm is saved, the battery pack mounting beam (for example, the front floor lower rail) can be lowered with the lifting of the battery pack to lower the design height, so that the battery pack mounting beam can be designed to be lighter in weight. Further reducing the weight of the front floor assembly 100 is advantageous for the weight reduction of the automobile 200.

The above description is only for the preferred embodiment of the present disclosure, and is not intended to limit the disclosure, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the disclosure should be included in the protection of the present disclosure. Within the scope.

Claims (15)

A front floor assembly, comprising: a connecting plate and a battery pack, wherein the battery pack comprises a battery pack sealing cover and a battery tray, and a sealed space for accommodating the battery module is formed between the battery pack sealing cover and the battery tray The connecting plate is provided with a notch, the battery pack is disposed at the notch position, and a top edge of the battery pack sealing cover is connected to the inner side of the connecting plate and covers the notch to form a front floor. The front floor assembly according to claim 1, wherein the battery pack sealing cover comprises a top cover and a side cover surrounding the outer edge of the top cover, the top of the side cover The side is connected below the outer edge of the top cover, and the bottom side of the side cover is attached to the outer edge of the battery tray. The front floor assembly according to claim 2, wherein the front floor assembly further comprises a front underfloor rail, the top of the front underfloor rail is fixedly coupled below the connecting panel, The inner edge of the web overlaps over the outer edge of the top cover. The front floor assembly according to claim 3, wherein both sides of the top opening of the front floor side rail respectively form an outer flange and an inner flange, and the outer flange and the inner flange are fixedly connected to each other. a sealing member is press-fitted between the inner flange and the outer edge of the top cover. The front floor assembly according to claim 3, wherein said battery tray includes a battery tray panel recessed downwardly and an outer edge fixedly attached to said battery tray panel and projecting outwardly from said battery tray panel a mounting plate fixedly coupled to the bottom of the front floor lower rail. The front floor assembly according to claim 5, wherein a top side edge of the battery tray panel is outwardly bent to form a first flange, and a bottom side edge of the side cover is bent outward to form a first The second flange is connected to the upper surface of the first flange. The front floor assembly according to claim 5, wherein a top side edge of the side cover is bent inwardly to form a third flange, and the third flange is sealingly connected to the top cover. lower surface. A front floor assembly according to any one of claims 2-7, wherein the outer edge of the top cover is fixedly coupled to a mounting nut for attaching the battery pack sealing cover to the vehicle body. A front floor assembly according to any of claims 2-8, wherein the top cover is an integrally formed composite panel. The front floor assembly according to claim 9, wherein the front floor assembly further comprises a central passage mounting stud for mounting the sub-dash and the shifting mechanism mounting bracket, and a power amplifier for mounting the power amplifier module Module mounting studs, battery module mounting studs for mounting battery modules, harness mounting studs for mounting automotive wiring harnesses, duct mounting studs for installation ducts, and sheet metal for mounting sheet metal guards a guard plate mounting stud, the central channel mounting stud, a power amplifier module mounting stud, a battery module mounting stud, a wire harness mounting stud, a duct mounting stud, and a sheet metal guard mounting stud integrally formed on the top In the cover plate; The upper part of the top cover is divided into a front mounting area, a middle mounting area and a rear mounting area from front to back; the central channel mounting stud is disposed at an intermediate position of the front mounting area, and the power amplifier module a mounting stud and the harness mounting stud are disposed on a left side of the central mounting area, and the battery module mounting stud and the sheet metal guard mounting stud are disposed on a right side of the central mounting area, The duct mounting stud is disposed at an intermediate position of the rear mounting area. The front floor assembly of claim 2 wherein said battery pack sealing cover is an integrally formed sheet metal member or an integrally formed composite panel. The front floor assembly of claim 11 wherein said front floor assembly further comprises a front underfloor rail and a closure cover web, said top of said front under deck rail being fixedly coupled to said joint Below the plate, an inner edge of the sealing cover connecting plate is fixedly connected above an outer edge of the top cover, an inner edge of the connecting plate is overlapped above the sealing cover connecting plate, the connecting plate A seal is press-fitted between the inner edge and the sealing cover connecting plate. The front floor assembly according to claim 12, wherein said battery tray includes a battery tray panel recessed downwardly and an outer edge fixedly attached to said battery tray panel and projecting outwardly from said battery tray panel a mounting plate fixedly coupled to the bottom of the front floor lower rail. The front floor assembly according to claim 13, wherein both sides of the top opening of the front floor side rail respectively form an outer flange and an inner flange, and the outer flange and the inner flange are fixedly connected to each other. The lower surface of the connecting plate is press-fitted between the inner flange and the sealing cover connecting plate. A vehicle characterized by comprising the front floor assembly of any of claims 1-14.

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