CN115402422B - Rear floor assembly and vehicle - Google Patents

Abstract

The invention discloses a floor assembly and a vehicle, which can provide sufficient storage space, ensure structural strength and improve space utilization. The rear floor assembly includes a floor panel, a longitudinal beam assembly, a cross beam assembly, a rear apron assembly and a trunk storage box, wherein the longitudinal beam assembly is connected to the floor panel; the cross beam assembly includes a rear panel with both ends connected to the longitudinal beam assembly. Cross beam; the rear apron assembly is connected to the longitudinal beam assembly, and forms an installation area with the longitudinal beam assembly and the rear cross beam; the trunk storage box is located in the installation area, and the trunk storage box includes a box body with a storage cavity and a connection On the connecting edge of the box body, the connecting edge is continuously arranged along the circumferential surface of the box body, and the connecting edge is connected with the rear panel assembly, the longitudinal beam assembly and the rear cross beam. The trunk storage box directly forms the panel covering the rear half of the frame, and the storage cavity is located below the connected frame part. At the same time, the box with the storage cavity directly forms the floor of the trunk, and makes full use of the body's The space beneath the floor panel.

Description

Rear floor assembly and vehicle

Technical field

The present invention relates to the technical field of rear floor assemblies, and in particular to a rear floor assembly and a vehicle.

Background technique

In vehicles in the prior art, in order to create a trunk storage space on the rear floor assembly, a common method is to use several sheet metal panels to weld into a storage pool in the trunk area of the panel of the rear floor assembly. , it will significantly increase the weight of the car body, and the production process has problems such as difficulty in sealing and complicated processes.

To sum up, the existing technology has the problem of difficulty in designing and molding the trunk of the rear floor assembly, and there are also technical problems of small storage space and low space utilization.

Contents of the invention

In order to solve the above technical problems, the present invention provides a rear floor assembly and a vehicle, which can provide sufficient storage space, ensure structural strength and improve space utilization.

The solution to achieve the technical purpose of the present invention is a rear floor assembly, including:

floor panels;

Stringer assemblies connected to the floor panels;

Cross member assemblies, including rear cross members connected to longitudinal member assemblies at both ends;

The rear apron assembly is connected to the longitudinal beam assembly and forms an installation area enclosed with the longitudinal beam assembly and the rear cross beam;

A trunk storage box is located in the installation area. The trunk storage box includes a box body with a storage cavity and a connecting edge connected to the box body. The connecting edge is along the peripheral surface of the box body. Arranged continuously, the connecting edge is connected to the rear apron assembly, the longitudinal beam assembly and the rear cross beam.

In some embodiments, the connecting edge includes an overlapping edge and a connecting plate connecting the overlapping edge and the box body; the connecting plate is provided with at least four mounting holes spaced apart along the circumferential direction, and the There are connectors in the mounting holes.

In some embodiments, the connecting edge is provided with main positioning holes and auxiliary positioning holes spaced apart along the length direction of the trunk storage box; the rear floor assembly also includes a main positioning hole provided on the main positioning hole. hole and the positioning pin in the auxiliary positioning hole;

The main positioning hole is a transitional fit or clearance fit with the positioning pin; the auxiliary positioning hole is a waist-shaped hole extending along the length direction of the trunk storage box, and the width of the waist-shaped hole is not less than the positioning pin diameter of.

In some embodiments, the rear floor assembly further includes a support rod, a first end of the support rod is connected to the outer circumferential surface of the box body, and a second end is connected to the rear cross member. higher than the first end.

In some embodiments, the number of the support rods is more than two, and the two or more support rods are spaced apart along the length direction of the box body and parallel to each other, and the first end of the support rod is connected to the The box body is close to the outer surface of the rear cross member.

In some embodiments, the inner surface of the box is a smooth plane; or the cavity wall of the box is a corrugated plate structure.

In some embodiments, limiting ribs and height-limiting convex portions are provided at intervals on the lower surface of the connecting edge. The limiting ribs are continuously provided along the circumferential direction of the connecting edge. The height-limiting convex portion is located on the The outside of the limiting rib.

In some embodiments, the trunk storage box is further provided with at least two mounting brackets, and the at least two mounting brackets are respectively connected to the box body and the connecting edge.

In some embodiments, the upper surface of the connecting edge is provided with a reinforcing structure; the reinforcing structure includes a first reinforcing rib, an inner ring convex rib, and an outer ring convex rib. The convex ribs are continuously arranged along the circumferential direction of the connecting edge, the inner ring convex ribs are spaced apart from the outer ring convex ribs, and the inner ring convex ribs are located in the area surrounded by the outer ring convex ribs;

The first reinforcing rib is located between the inner ring convex rib and the outer ring convex rib, and the first reinforcing rib is connected to the connecting edge, the inner ring convex rib and the outer ring convex rib. .

Based on the same inventive concept, the present invention also provides a vehicle, including the above-mentioned rear floor assembly.

It can be seen from the above technical solution that the present invention provides a rear floor assembly, which includes a floor panel, a longitudinal beam assembly, a cross beam assembly, a rear wall panel assembly and a trunk storage box. The longitudinal beam assembly is connected to the floor panel; the cross beam The assembly includes a rear cross member connected to the longitudinal beam assembly at both ends for enhancing the frame strength of the longitudinal beam assembly. The rear apron assembly is connected to the longitudinal beam assembly and is enclosed with the longitudinal beam assembly and the rear cross beam. The installation area is located at the trunk of the vehicle, that is, the floor panel only covers the front part of the frame of the rear floor assembly, so that the part of the frame corresponding to the trunk forms a hollow installation area. The trunk storage box is located in the installation area and is connected to the rear apron assembly, the longitudinal beam assembly and the rear cross member through connecting edges. The trunk storage box directly forms a panel covering the rear half of the frame. It is formed with the floor panel to form a panel assembly, and at least part of the storage cavity is located below the connected frame part. At the same time, the box with the storage cavity directly forms the floor of the trunk, and fully utilizes the space below the floor panel of the vehicle body. Sufficient storage space for the vehicle.

Description of the drawings

Figure 1 is a partial top view of the rear floor assembly provided by Embodiment 1 of the present invention;

Figure 2 is a schematic bottom view of the rear floor assembly in Figure 1;

Figure 3 is a partial enlarged schematic diagram of the rear floor assembly in Figure 2;

Figure 4 is a side view of Figure 3;

Figure 5 is a schematic structural diagram of the trunk storage box of the rear floor assembly in Figure 1;

Figure 6 is a top view of the trunk storage box in Figure 5;

Figure 7 is a bottom view of the trunk storage box in Figure 5;

Figure 8 is a cross-sectional view of the trunk storage box in Figure 5 without glue coating;

Figure 9 is a cross-sectional view of the trunk storage box in Figure 5 after the overlapping edges are glued;

FIG. 10 is a schematic diagram of the reinforced structure of the trunk storage box in FIG. 5 .

Explanation of reference signs: 100-rear floor assembly, 110-floor panel, 120-longitudinal beam assembly, 130-rear cross member, 140-rear apron assembly, 150-trunk storage box, 151-box body, 152- Connecting edge, 153-lap edge, 154-connecting plate, 155-mounting hole, 156-main positioning hole, 157-auxiliary positioning hole, 158-limiting rib, 159-height limit convex part, 160-support rod, 171- Pipe bracket, 172- Bottom guard bracket, 173- Rear protection bracket, 174- Snap hole, 175- Adhesive glue, 180- Reinforcement structure, 181- First reinforcement rib, 182- Inner ring convex rib, 183- Outer ring ribs, 190-connector.

Detailed ways

In order to enable those skilled in the technical field to which this application belongs to understand this application more clearly, the technical solutions of this application will be described in detail through specific embodiments in conjunction with the accompanying drawings.

The applicant found that in the existing technology, the rear floor panels of new energy vehicles are flat or are made of sheet metal panels welded into a storage pool. If the rear floor is directly made flat, the space under the floor is wasted and cannot be provided to customers. Provide more storage space; if several sheet metal panels are welded into a storage pool in the rear floor area, it will significantly increase the weight of the car body, and the production process will have problems such as difficulty in sealing and complicated processes.

In order to solve the above technical problems, the present invention provides a floor assembly and a vehicle, which can provide sufficient storage space, ensure structural strength and improve space utilization. The content of the present invention is introduced in detail below through two specific embodiments:

Example 1

As shown in Figures 1 to 10, this embodiment provides a rear floor assembly 100, which includes a floor panel 110, a longitudinal beam assembly 120, a cross beam assembly, a rear apron assembly 140 and a trunk storage box 150. Among them: the floor panel 110 serves as a base for installing the vehicle's skeleton structure and various device components. The longitudinal beam assembly 120 is connected to both sides of the floor panel 110 in the width direction; the cross beam assembly includes a rear cross beam 130 with both ends connected to the longitudinal beam assembly 120 for enhancing the frame strength of the longitudinal beam assembly 120; the rear apron assembly 140 is connected to The longitudinal beam assembly 120 and the longitudinal beam assembly 120 and the rear cross member 130 form an installation area. The installation area is located at the trunk position of the vehicle, that is, the floor panel 110 only covers the front portion of the frame of the rear floor assembly 100, so that the frame The part corresponding to the trunk forms a hollow installation area. The trunk storage box 150 is located in the installation area as an independent storage structure. The trunk storage box 150 includes a box body 151 with a storage cavity and a connecting edge 152 connected to the box body 151. The connecting edge 152 extends along the box body 151. The perimeter of the trunk is continuously arranged, and is connected to the rear apron assembly 140, the longitudinal beam assembly 120 and the rear cross member 130 through the connecting edges 152. The trunk storage box 150 directly forms a panel covering the rear half of the frame. At the same time, the box body 151 The inner profile directly forms the floor of the trunk, and is enclosed by the side panels, top panel and rear door of the body to form the trunk. And at least part of the storage cavity is located below the connected frame part, making full use of the space below the floor panel 110 of the vehicle body to provide sufficient storage space for the vehicle.

This embodiment does not specifically limit the structure of the connecting edge 152 , as long as the box body 151 is mounted on the connecting edge 152 . In some embodiments, the connecting edge 152 may include an overlapping edge 153 and a connecting plate 154 connecting the overlapping edge 153 and the box body 151 . The overlapping edge 153 is used to overlap with the longitudinal beam assembly 120 , the rear cross member 130 , and the rear apron assembly 140 , the connecting plate 154 is provided with at least four mounting holes 155 spaced apart along the circumferential direction. The mounting holes 155 are provided with connectors 190. The connection and fixation are achieved through the connectors 190 passing through the mounting holes 155. The mounting holes 155 are reasonably distributed. , ensuring the connection strength and effectively preventing the connection edge 152 from deforming.

The width and height dimensions of the connecting edge 152 of the trunk storage box 150 in this embodiment can be designed according to the required bonding strength. This embodiment does not specifically limit the number of mounting holes 155. In order to ensure the stability of the connection, preferably, the number of mounting holes 155 can be 7, 8 or more. At the same time, to facilitate assembly, the hole diameter can be designed to be larger. For these, the diameter of the mounting via hole is D+1~D+6, where D is the diameter of the bolt.

This embodiment does not specifically limit the connection structure of the connecting edge 152 with the longitudinal beam assembly 120, the rear cross member 130, and the rear apron assembly 140. It can be directly connected and fixed with the longitudinal beam assembly 120, the rear beam 130, and the rear apron assembly 140. , or by adding sheet metal on the inside of the longitudinal beam assembly 120 , the rear cross member 130 , and the rear apron assembly 140 close to the installation area, and connecting them to the connecting edge 152 through the sheet metal.

In order to ensure the installation accuracy of the trunk storage box 150 and ensure the sealed connection installation after the overlapping edge 153 is overlapped, in this embodiment, the connecting edge 152 is provided with main positioning points arranged at intervals along the length direction of the trunk storage box 150 hole 156 and auxiliary positioning hole 157; the rear floor assembly 100 also includes positioning pins provided in the main positioning hole 156 and the auxiliary positioning hole 157 to initially determine the position of the trunk storage box 150 and facilitate the insertion of the connector 190 .

This embodiment does not specifically limit the shape and structure of the main positioning hole 156/auxiliary positioning hole 157 and the matching method with the positioning pin. In some embodiments, both the main positioning hole 156 and the auxiliary positioning hole 157 can have shapes matching the positioning pins, and an interference fit, a transition fit, or a clearance fit can be used.

In order to reserve adjustment space, in some embodiments, the main positioning hole 156 is a transition fit or clearance fit with the positioning pin; the auxiliary positioning hole 157 is a waist extending along the length direction of the trunk storage box 150 (ie, the width direction of the vehicle body). The width of the waist-shaped hole shall not be less than the diameter of the positioning pin. The main positioning hole 156 and the auxiliary positioning hole 157 have different structures, which ensure accuracy and facilitate quick alignment during assembly. As an embodiment, the diameter of the positioning pin is 6 mm, the main positioning hole 156 is set to a diameter of 6.5 mm, and the auxiliary positioning hole 157 is a waist-shaped hole of 6.5*10.

This embodiment does not specifically limit the positioning pin, and any feasible solution can be adopted. Since the thickness of the sheet metal of the body is thin, it is inconvenient to open sinking grooves. Preferably, the positioning pins are studs welded to the sheet metal of the body, which facilitates observation and enables quick alignment during assembly. The overlapping edge 153 is overlapped with the sheet metal around the body. The connecting plate 154 is positioned with the sheet metal through positioning pins and connected and fixed through the connector 190. This can ensure the modality of the trunk storage box 150 without excessively long overhangs. .

Since the trunk storage box 150 is only connected to the skeleton structure of the floor assembly through the top connecting edge 152 and the bottom of the trunk storage box 150 is not supported, it is easy to cause a problem of insufficient modality at the bottom of the storage box, causing road noise. A big problem; in addition, the storage box will be loaded with items during actual use by customers. Therefore, during the design stage, it is necessary to consider loading a certain load on the rear storage box during the vehicle road test. After adding the load, due to the The center of gravity of the 150 is lower, which poses a great risk to strength and durability. In order to effectively improve the durability and strength of the storage box and prevent problems such as cracking.

In some embodiments, the rear floor assembly 100 may also include a support rod 160. The first end of the support rod 160 is connected to the outer peripheral surface of the box body 151, the second end is connected to the rear cross member 130, and the second end is higher than the first end. , by adding a support structure at the bottom and connecting it to the high-strength rear cross member 130 belonging to the rear floor frame, combined with screw joints and adhesive bonding, the modal and durability strength shortcomings of the trunk storage box 150 are well solved. The problem. As a connection method, the rear cross member 130 is provided with a welded nut, and is fixed with the stay rod 160 through bolts. The two mounting points on the trunk storage box 150 are riveted nuts, which are also fixed with the stay rod 160 through bolts.

As a preferred embodiment, the number of the support rods 160 is more than two. The two or more support rods 160 are spaced apart along the length direction of the box body 151 and parallel to each other. The first end of the support rods 160 is connected to the back of the box body 151 . On the outer surface of the cross beam 130, the strut 160 significantly improves the NVH modal performance. This structure can effectively suppress the X-direction swing of the storage box. The simulation results show that it can significantly improve the modal performance of the rear storage box, effectively improving the storage capacity. The durable strength of the object box prevents problems such as cracking. Preferably, the struts 160 are stamped and formed from metal pipes to maintain rigidity and strength.

In some preferred embodiments, the lower surface of the connecting edge 152 is provided with limiting ribs 158 and height-limiting convex portions 159 at intervals. The limiting ribs 158 are continuously arranged along the circumferential direction of the connecting edge 152 , and the height-limiting convex portions 159 are located on the limiting ribs 158 outside. On the one hand, the limiting ribs 158 and the height-limiting protrusions 159 improve the carrying strength of the trunk storage box 150, significantly increase the structural strength of the flange surface, and the connecting edge 152 is not easily deformed during molding; on the other hand, the limiting ribs 158 The ribs 158 have a glue-blocking function to prevent the glue from overflowing after lamination, and better ensure the bonding strength and sealing performance. The height-limiting cylinder ensures the Z-direction space required for the glue application of the connecting edge 152 to avoid This solves the technical problem of insufficient bonding strength and poor sealing performance of the adhesive glue 175 caused by insufficient Z-direction space caused by deformation and collapse of the connecting edge 152 .

In some embodiments, in order to further improve the connection strength of the trunk storage box 150 and at the same time provide mounting points for vehicle components to avoid installing additional mounting points on the body sheet metal, the trunk storage box 150 is also provided with at least two At least two mounting brackets are respectively connected to the box body 151 and the connecting edge 152, so that the plastic trunk storage box 150 can provide multiple functional mounting points on the top, bottom or side. Optionally, each mounting bracket is in the form of a riveted nut, which has low cost and good structural strength.

In some embodiments, the installation bracket may include a pipeline bracket 171 provided on the outer side of the box body 151; in some embodiments, the installation bracket may also include a bottom guard bracket 172 and a rear panel bracket provided on the bottom surface of the box body 151. The protection bracket 173 can enhance the support strength and stability through the rear protection plate connected to the rear apron assembly 140; the installation bracket can also include a buckle hole 174 provided on the connecting edge 152 for fixing the wiring harness, so as to avoid the installation of the wiring harness on the vehicle body. The sheet metal upper bracket is fixed, which reflects the integrated function of the storage box, that is, the rear floor assembly 100 integrates high-voltage wires, OBC water pipes, bottom guards, rear protection installation points, etc.

In this embodiment, the material of the trunk storage box 150 is not specifically limited, as long as sufficient support strength can be ensured. In some embodiments, the trunk storage box 150 can be made of metal, or preferably plastic material. For example, the storage box can be made of long glass fiber reinforced polypropylene material, and an injection molding process can be used to reduce weight and cost.

In this embodiment, the adhesive glue 175 is not specifically limited, and can be any feasible structure in the prior art. For example, the adhesive glue 175 is a polyurethane polymer material, and the plastic rear storage box is constructed by Apply a circle of adhesive on the back of edge 153, press the adhesive during assembly, and then solidify to bond the plastic storage box to the body sheet metal.

In order to increase the overall strength and avoid deformation of the connecting edge 152, a reinforcing structure 180 is provided on the upper surface of the connecting edge 152. This embodiment does not specifically limit the location of the reinforcing structure 180 , and may be located on the overhang 153 and/or the connecting plate 154 . In some embodiments, in order to enhance the structural strength of the overlapping edge 153, and because the trunk storage box 150 is mounted behind the vehicle body, the upper surface of the connecting edge 152 is directly exposed to the inside of the vehicle body, in order to avoid affecting the look and feel and improve the user experience. To prevent the reinforcing structure 180 from affecting the user's movements, the reinforcing structure 180 is provided on the overlapping edge 153 . The overlapping edge 153 only occupies a small area of the connecting edge 152 and is located outside the connecting edge 152 .

This embodiment does not specifically limit the reinforcing structure 180 on the edge 153, and reference can be made to the existing technology. As a preferred embodiment, the reinforcing structure 180 includes a first reinforcing rib 181, an inner ring convex rib 182 and an outer ring convex rib 183. The inner ring convex rib 182 and the outer ring convex rib 183 are continuously arranged along the circumferential direction of the connecting edge 152. The inner ring convex rib 182 and the outer ring convex rib 183 are spaced apart, and the inner ring convex rib 182 is located in the area surrounded by the outer ring convex rib 183; the first reinforcing rib 181 is located between the inner ring convex rib 182 and the outer ring convex rib 183. , the first reinforcing rib 181 is connected to the connecting edge 152, the inner ring convex rib 182 and the outer ring convex rib 183;

In order to further strengthen the strength of the overlapping edge 153, the limiting ribs 158 and the inner ring convex ribs 182 overlap on the projection of the plane where the overlapping edge 153 is located. The limiting ribs 158 overlap with the reinforcing ribs on the upper surface, which significantly increases the flange surface. Structural strength, the flange surface is not easily deformed during injection molding.

In order to further enhance the strength of the overlapping edge 153, in the trunk storage box 150 provided in this embodiment, the first reinforcing rib 181 can be arranged at an angle with both the inner ring convex rib 182 and the outer ring convex rib 183, so that the first reinforcing rib 181 can be arranged at an angle. The ribs 181 and the inner ring convex ribs 182 and/or the outer ring convex ribs 183 form a triangular reinforced area. This embodiment does not specifically limit the shape of the first reinforcing rib 181 and the forming method of the triangular reinforcing area. For example, in some embodiments, the first reinforcing rib 181 can use a V-shaped rib as the minimum unit and multiple V-shaped ribs. It is formed by continuous bending of strips, as shown in the figure. In some embodiments, the first reinforcing ribs 181 may also have an X-shape, a rice-shape, or a diamond-shape as the minimum unit, and may be connected end-to-end continuously. Among them, the V-shaped rib structure is simple and easy to form.

This embodiment does not specifically limit the shape of the box body 151 and the shape of the storage cavity. In some embodiments, in order to fully utilize the volume of the box body 151, it is preferred that the box body 151 and the storage cavity have the same shape. In some embodiments, in order to improve the utilization of the box 151 while avoiding rear wheels, the lengths of the two opposite cavity walls in the width direction of the box 151 are different.

Since the bottom surface and four sides of the box body 151 are used as storage bearing surfaces, in order to ensure that the strength of the box body 151 is sufficient, in some embodiments, the box body 151 is provided with reinforcing ribs. In this embodiment, the molding of the reinforcing ribs is The method and distribution are not specifically limited. For example, in some embodiments, the inner surface of the box 151 can be a smooth plane, and the surface is flat without bulges. It can be used as an exterior surface, which is more friendly to customers' storage function requirements. And a second reinforcing rib is provided on the outer bottom surface of the box body 151 . A number of third ribs are provided on the outer side of the box body 151, and the reinforcing ribs are arranged in invisible positions on the back, ensuring the strength of the storage box and ensuring sufficient space in the storage cavity. In order to further enhance the strength of the structure 180 , in some embodiments, at least one third rib can be integrated with the second rib to jointly strengthen the connection strength between the box body 151 and the connecting edge 152 . In addition, the walls of the storage cavity of the box body 151 can be connected by arc transition.

This embodiment does not specifically limit the structural shape of the second reinforcing rib. As a preferred embodiment, the second reinforcing rib is in a honeycomb shape and fully covers the outer bottom surface of the storage box, effectively ensuring the load-bearing strength and satisfying the rated load. , the static stiffness and modal meet the requirements.

In some embodiments, the cavity wall of the box body 151 can be a corrugated plate structure formed by stamping, and the body is bent and ribbed to form convex ribs on the storage cavity side of the box body 151. On the outer surface of the box body 151 Grooves are formed on the sides for better structural strength, but they cannot be used as appearance surfaces.

Example 2

Based on the same inventive concept, this embodiment provides a vehicle, including the rear floor assembly 100 in Embodiment 1, which naturally has the beneficial effects of Embodiment 1 and Embodiment 2, and will not be described again here.

The present invention does not specifically limit the type and type of vehicle. It can be any vehicle in the prior art, such as a household car, a passenger car, a truck, etc. For other undetailed structures of the vehicle, reference can be made to the relevant disclosures in the prior art. , no expansion explanation is given here.

Although the preferred embodiments of the present application have been described, those skilled in the art will be able to make additional changes and modifications to these embodiments once the basic inventive concepts are understood. Therefore, it is intended that the appended claims be construed to include the preferred embodiments and all changes and modifications that fall within the scope of this application.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (9)

1. A rear floor assembly, comprising:

a floor panel;

the framework comprises a longitudinal beam assembly, a cross beam assembly and a back coaming assembly, and the floor panel is covered on the front section of the framework; the longitudinal beam assembly is connected to the floor panel; the beam assembly comprises a rear beam with both ends connected to the longitudinal beam assembly; the back panel assembly is connected to the longitudinal beam assembly and surrounds an installation area with the longitudinal beam assembly and the rear cross beam;

the trunk storage box is positioned in the installation area and comprises a box body with a storage cavity and a connecting edge connected with the box body, the connecting edge is continuously arranged along the peripheral surface of the box body, and the connecting edge is connected with a back panel assembly, a longitudinal beam assembly and a back cross beam; at least part of the storage cavity is positioned below the connected framework, and the box body with the storage cavity directly forms a bottom plate of the trunk;

the first end of the stay bar is connected to the outer side face, close to the rear cross beam, of the box body, the second end of the stay bar is connected to the rear cross beam, and the second end of the stay bar is higher than the first end.

2. The rear floor assembly of claim 1, wherein the connecting edge comprises a lap edge and a connecting plate connecting the lap edge to the box; at least four mounting holes are formed in the connecting plate at intervals along the circumferential direction, and connecting pieces are arranged in the mounting holes.

3. The rear floor assembly of claim 1, wherein said connecting edge is provided with primary and secondary locating holes spaced along the length of said trunk storage box; the rear floor assembly further comprises positioning pins arranged in the main positioning holes and the auxiliary positioning holes;

the main positioning hole is in transition fit or clearance fit with the positioning pin; the auxiliary positioning hole is a waist-shaped hole extending along the length direction of the trunk storage box, and the width of the waist-shaped hole is not smaller than the diameter of the positioning pin.

4. The rear floor assembly of claim 1, wherein the number of braces is two or more, the two or more braces being spaced apart and parallel to one another along the length of the box.

5. The rear floor assembly of any one of claims 1-4, wherein the interior surface of the box is smooth; or, the cavity wall of the box body is of a corrugated plate structure.

6. The rear floor assembly as claimed in any one of claims 1 to 4, wherein the lower surface of the connecting edge is provided with spacing ribs and height limiting protrusions at intervals, the spacing ribs being continuously provided along the circumferential direction of the connecting edge, the height limiting protrusions being located outside the spacing ribs.

7. The rear floor assembly of any one of claims 1-4, wherein at least two mounting brackets are further provided on the trunk storage box, the at least two mounting brackets being connected to the box body and the connecting edge, respectively.

8. The rear floor assembly of any one of claims 1-4, wherein an upper surface of said connecting edge is provided with a reinforcing structure; the reinforcing structure comprises a first reinforcing rib, an inner ring rib and an outer ring rib, wherein the inner ring rib and the outer ring rib are continuously arranged along the circumferential direction of the connecting edge, the inner ring rib and the outer ring rib are arranged at intervals, and the inner ring rib is positioned in an area surrounded by the outer ring rib;

the first reinforcing rib is positioned between the inner ring convex rib and the outer ring convex rib, and the first reinforcing rib is connected with the connecting edge, the inner ring convex rib and the outer ring convex rib.

9. A vehicle comprising the rear floor assembly of any one of claims 1-8.