CN218112794U

CN218112794U - Rear floor framework structure, rear floor assembly and vehicle

Info

Publication number: CN218112794U
Application number: CN202222061728.8U
Authority: CN
Inventors: 钟华; 赵亚明
Original assignee: Avatr Technology Chongqing Co Ltd
Current assignee: Avatr Technology Chongqing Co Ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-12-23
Anticipated expiration: 2032-08-05

Abstract

The utility model belongs to the field of automobile manufacturing, in particular to a rear floor framework structure, a rear floor assembly and a vehicle, wherein the rear floor framework structure comprises two rear longitudinal beam assemblies and at least one cross beam; the two rear longitudinal beam assemblies are arranged at intervals along the width direction of the longitudinal beam body; at least one cross beam is connected between the two longitudinal beam bodies. The rear longitudinal beam assembly is of an integrally formed structure, so that the process flow is reduced, and the manufacturing procedure of the rear floor framework structure is simplified; because the rear longitudinal beam assembly is of an integrally formed structure, the continuity of the rear floor framework structure is improved, so that the collision force can be better transmitted on the rear floor framework structure, and the collision performance of the rear floor assembly structure is improved.

Description

Rear floor framework structure, rear floor assembly and vehicle

Technical Field

The utility model relates to an automobile manufacturing technical field especially relates to a back floor skeleton texture, back floor assembly and vehicle.

Background

The rear floor framework structure is an important component of a vehicle body framework, and plays roles of absorbing energy, transmitting energy, providing sufficient rigidity for the vehicle body framework and the like in collision while bearing parts in various fields in the rear floor assembly.

In the related art, the rear floor framework structure is generally formed by welding dozens of parts such as a rear longitudinal beam, a rear damping tower and a rear cross beam through a plurality of sets of tool fixtures, is complex in structure and production process, and is not beneficial to light weight of a vehicle body, production beat of the whole vehicle and improvement of driving mileage. When a vehicle collides, collision force cannot be well transmitted, so that the barrier invasion amount is large and passengers are greatly injured when the vehicle collides.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a back floor skeleton texture, back floor assembly and vehicle for it is complicated to solve current back floor skeleton texture, and the production technology is complicated, and when the vehicle collided, the barrier invasion volume was big, caused the technical problem of great injury for the passenger.

Therefore, according to one aspect of the present invention, a rear floor skeleton structure is provided, which comprises two rear longitudinal beam assemblies and at least one cross beam;

the rear longitudinal beam assemblies comprise longitudinal beam bodies and damping towers integrally formed on the longitudinal beam bodies, and the two rear longitudinal beam assemblies are arranged at intervals along the width direction of the longitudinal beam bodies; at least one cross beam is connected between the two longitudinal beam bodies.

Optionally, one side of the longitudinal beam body, which is far away from the cross beam, is of a U-shaped structure, and the rear part, which is close to the longitudinal beam body, of the inside of the U-shaped structure is provided with an energy absorption structure.

Optionally, the energy absorbing structure comprises ribs arranged intermittently in the vertical and/or diagonal direction.

Optionally, a reinforcing structure is further arranged inside the U-shaped structure; the energy absorption structure is located between the shock absorption tower and the rear portion, and the reinforcing structure is located between the shock absorption tower and the front portion of the longitudinal beam body.

Optionally, the longitudinal beam body and the damping tower are integrally formed by aluminum or aluminum alloy high-pressure casting.

Optionally, at least one of the shock absorption tower and the cross beam is provided with a plurality of reinforcing ribs distributed in a criss-cross manner.

According to another aspect of the utility model, a back floor assembly is provided, this back floor assembly includes:

the rear floor framework structure;

the rear floor panel is connected to the middle part of the rear floor framework structure;

the two threshold beams are respectively connected to the front parts of the two longitudinal beam bodies; and

and the two rear energy absorption boxes are respectively connected to the rear parts of the two longitudinal beam bodies.

Optionally, the threshold beam and the front part are connected by a fastener and a first hot-melt self-tapping screw; the rear energy absorption box is connected with the rear part through a second hot-melting self-tapping screw.

Optionally, the rear floor assembly further comprises a rear impact beam connected to the ends of the two energy absorption boxes far away from the rear portion.

According to a further aspect of the present invention, there is provided a vehicle including the rear floor skeleton structure described above or including the rear floor assembly described above.

The utility model provides a rear floor skeleton texture, rear floor assembly and vehicle's beneficial effect lies in: compared with the prior art, the two rear longitudinal beam assemblies in the rear floor framework structure of the utility model both comprise the longitudinal beam body and the damping tower integrally formed on the longitudinal beam body, namely, the rear longitudinal beam assembly is of an integrally formed structure, so that the rear longitudinal beam assembly does not need to be formed by welding a plurality of parts through a tool fixture, the process flow is reduced, the manufacturing procedure of the rear floor framework structure is simplified, and the lightweight of the vehicle body, the production beat of the whole vehicle and the promotion of the traveling mileage are facilitated; because the rear longitudinal beam assembly is of an integrally formed structure, the continuity of the rear floor framework structure is improved, so that the collision force can be better transmitted on the rear floor framework structure, the collision performance of the rear floor assembly structure is improved, meanwhile, the intrusion amount of barriers during vehicle collision can be reduced, and the injury to passengers is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

fig. 1 is a schematic perspective view of a rear floor skeleton structure according to an embodiment of the present invention;

fig. 2 is a bottom view of a three-dimensional structure of a rear floor frame structure according to an embodiment of the present invention;

fig. 3 is a side view of a three-dimensional structure of a rear floor skeleton structure according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a rear floor assembly according to an embodiment of the present invention;

FIG. 5 is a side view of the structure of the rear floor assembly shown in one embodiment of the present invention;

fig. 6 is a plan view of a structure of a rear floor assembly according to an embodiment of the present invention.

Description of the main element symbols:

10. a rear floor skeleton structure; 20. a rear floor panel; 30. a threshold beam; 40. a rear energy absorption box; 50. a fastener; 60. a first hot melt tapping screw; 70. a second heat-fusible tapping screw; 80. a rear impact beam;

100. a rear longitudinal beam assembly; 110. a stringer body; 111. a front portion; 1111. a side vertical plate; 1112. a top plate; 112. a rear portion; 120. a shock tower; 121. a damper mounting hole; 130. an energy absorbing structure; 140. a reinforcing structure; 200. a front cross member; 300. a middle cross beam; 400. a rear cross member; 500. and (5) reinforcing ribs.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As described in the background art, the rear floor framework structure in the related art is generally formed by welding dozens of parts such as a rear longitudinal beam, a rear shock absorption tower and a rear cross beam through a plurality of sets of tool fixtures, and is complex in structure and production process, and not beneficial to light weight of a vehicle body, production tact of the whole vehicle and improvement of driving mileage. When the vehicle collides, the collision force cannot be well transmitted, so that the barrier invasion amount is large during the vehicle collision, and the passengers are greatly injured.

In order to solve the above problem, according to an aspect of the present invention, the embodiment of the present invention provides a rear floor skeleton structure, as shown in fig. 1, the rear floor skeleton structure 10 includes two rear longitudinal beam assemblies 100 and at least one cross beam;

the rear longitudinal beam assemblies 100 comprise longitudinal beam bodies 110 and shock absorption towers 120 integrally formed on the longitudinal beam bodies 110, and the two rear longitudinal beam assemblies 100 are arranged at intervals in the width direction of the longitudinal beam bodies 110; at least one cross beam is connected between two longitudinal beam bodies 110.

In the embodiment of the present invention, two rear longitudinal beam assemblies 100 in the rear floor skeleton structure 10 each include a longitudinal beam body 110 and a shock absorbing tower 120 integrally formed on the longitudinal beam body 110, that is, the rear longitudinal beam assembly 100 is an integrally formed structure, so that the rear longitudinal beam assembly 100 is formed by welding a tool fixture without a plurality of parts, thereby reducing the process flow, simplifying the manufacturing process of the rear floor skeleton structure 10, and facilitating the lightweight of the vehicle body, the production tact of the whole vehicle, and the promotion of the mileage; because the rear longitudinal beam assembly 100 is of an integrally formed structure, the continuity of the rear floor framework structure 10 is improved, so that the collision force can be better transmitted on the rear floor framework structure 10, the collision performance of the rear floor framework structure is improved, meanwhile, the intrusion amount of barriers during vehicle collision can be reduced, and the injury to passengers is reduced.

In addition, since the rear longitudinal beam assembly 100 is an integrally formed structure, the integration level of the rear floor skeleton structure 10 can be improved, and the improvement of the overall rigidity of the vehicle and the improvement of the NVH (Noise, vibration, harshness, noise, vibration and sound Vibration roughness) performance of the whole vehicle are facilitated, so that the driving comfort performance of the vehicle is improved.

It is understood that the front part 111 of the side member body 110 is the end of the side member body 110 facing the vehicle head, and the rear part 112 of the side member body 110 is the end of the side member body 110 facing the vehicle tail.

Wherein, the shock absorption towers 120 are used for installing shock absorbers, and two shock absorption towers 120 in the rear floor skeleton structure 10 are respectively located at the opposite outer sides of the two longitudinal beam bodies 110. The top of the shock-absorbing tower 120 is higher than the top of the stringer body 110, and the top of the shock-absorbing tower 120 is provided with a shock-absorber mounting hole 121 for fixing a shock absorber. The front portion 111 of the stringer body 110 is adapted to be connected to a rocker beam and the rear portion 112 is adapted to be connected to a rear crash box.

In the present embodiment, three cross members are provided, namely, a front cross member 200, a middle cross member 300 and a rear cross member 400, and the front cross member 200, the middle cross member 300 and the rear cross member 400 are sequentially connected between the two stringer bodies 110 at intervals from the front part 111 of the stringer body 110 to the rear part 112 of the stringer body 110 along the length direction of the stringer body 110.

In one embodiment, as shown in fig. 1 and 3, the side of the longitudinal beam body 110 facing away from the cross beam is a U-shaped structure, and the inside of the U-shaped structure is provided with an energy absorbing structure 130 near the rear portion 112 of the longitudinal beam body 110.

Since the rear portion 112 of the side member body 110 is used for installing the rear energy absorption box, the energy absorption structure 130 is disposed inside the U-shaped structure and near the rear portion 112, so that the energy absorption structure 130 can absorb the impact energy transmitted from the rear side member assembly 100, and the rear floor skeleton structure 10 can be better collapsed at the rear energy absorption box for absorbing energy.

In a particular embodiment, as shown in FIGS. 1 and 3, energy absorbing structure 130 includes ribs that are intermittently disposed along a vertical and/or diagonal direction.

Through the vertical and/or oblique design of the ribs inside the U-shaped structure and the disconnection of rib arrangement, the design of induced collision deformation is a main energy absorption area on the rear floor framework structure 10, and the impact energy generated by collision can be effectively absorbed by combining the rear energy absorption box and the rear anti-collision beam which are arranged at the rear part 112 of the longitudinal beam body 110.

Considering the lightweight, the rib is whole to be made into indent arc to furthest reduces unnecessary material and uses.

Preferably, the rib and the longitudinal beam body 110 are of an integrated structure, so that the connection strength is improved, and the process flow is reduced.

In a more specific embodiment, as shown in fig. 1 and 3, a reinforcing structure 140 is further provided inside the U-shaped structure; energy absorbing structure 130 is located between shock tower 120 and rear portion 112 of stringer body 110, and reinforcing structure 140 is located between shock tower 120 and front portion 111 of stringer body 110.

By arranging as above, the stringer body 110 between the shock absorbing tower 120 and the rear portion 112 forms an energy absorbing region in cooperation with the energy absorbing structure 130, and the energy absorbing region mainly generates relatively stable axial collision deformation. The longitudinal beam body 110 between the shock absorption tower 120 and the front part 111 is matched with the reinforcing structure 140 to form a force bearing area, and the force bearing area has higher bending rigidity to resist bending deformation and mainly plays a role in transferring collision load.

Particularly, in this embodiment, additional strengthening 140 is including arranging the follow-up strengthening rib with the transmission load inside the U type structure to and follow this follow-up strengthening rib cross arrangement vertical or with the vertical auxiliary reinforcement that is certain angle, in order to improve longeron body 110's rigidity, consider the lightweight, follow-up strengthening rib and auxiliary reinforcement are whole to be made the indent arc, use with furthest reduction unnecessary material, combine the energy-absorbing region, can effectively promote the biography power performance, promote whole car and resist the nature of bumping.

In one embodiment, as shown in fig. 2, subframe mounting holes are provided at the lower end of the longitudinal beam body 110 near the connection between the front cross beam 200 and the longitudinal beam body 110, and at the lower end of the longitudinal beam body 110 near the connection between the rear cross beam 400 and the longitudinal beam body 110.

Through the design, the lower end of the longitudinal beam body 110 is connected with the front end of a rear auxiliary frame through a fixing part (such as a bolt) by an auxiliary frame mounting hole arranged close to the joint of the front cross beam 200 and the longitudinal beam body 110; a sub-frame mounting hole provided at a lower end of the side member body 110 near a joint of the rear cross member 400 and the side member body 110 is used to be connected to a rear end of a rear sub-frame via a fixing member (e.g., a bolt).

Therefore, a force transmission path is formed at the joint of the front cross beam 200 and the longitudinal beam body 110 and the front end of the rear auxiliary frame, and uniform stress is ensured; the joint of the rear cross beam 400 and the longitudinal beam body 110 and the rear end of the rear auxiliary frame form a force transmission path, so that the uniform stress is ensured.

In one embodiment, as shown in fig. 1-3, the stringer body 110 is integrally formed with the shock tower 120 by high pressure casting aluminum or an aluminum alloy.

The rear longitudinal beam assembly 100 made of aluminum or aluminum alloy can effectively reduce the weight of the structure and improve the strength and rigidity of the structure.

Specifically, the rear longitudinal beam assembly 100 can be made of AlSi10MnMg, the material has sufficient elongation percentage and bending angle after tensile fracture, and can ensure that the structure has good plasticity, so that the integration level and the collision energy absorption performance of the structure are improved, and in order to further improve the plasticity of the structure, T7 heat treatment is performed on the product, so that the shape and size change can be kept within a specified range under the long-term service condition, and the performance stability of the automobile is ensured.

In some embodiments, as shown in fig. 1-3, the front cross member 200, the middle cross member 300, and the rear cross member 400 are made of an aluminum alloy material. Therefore, the longitudinal beam body 110 and the shock absorption tower 120 in the above embodiment are integrally formed by aluminum alloy high-pressure casting, so that the whole rear floor framework structure 10 is of an aluminum alloy structure, the weight of the rear floor framework structure 10 can be further reduced, and the driving range of the vehicle can be further improved.

Specifically, the front cross beam 200, the middle cross beam 300, and the rear cross beam 400 may be made of 6082 aluminum alloy, which has sufficient tensile strength and yield strength, so as to improve the strength of the entire rear floor skeleton structure 10, and in order to further improve the plasticity of the structure, the product is subjected to T6 heat treatment, which is beneficial to achieving the performance of the seat mounting Point stiffness IPI (initial Point inertia) and improving the collision performance.

In some embodiments, as shown in fig. 2 to 3, at least one of the longitudinal beam body 110, the shock absorbing tower 120, the front cross beam 200, the middle cross beam 300 and the rear cross beam 400 is provided with a plurality of reinforcing ribs 500 distributed in a crisscross manner.

By arranging the reinforcing ribs 500, the overall rigidity of the rear floor skeleton structure 10 is effectively improved.

Further, in order to further improve the light weight effect, the reinforcing ribs 500 are designed into an inward concave arc shape.

According to another aspect of the present invention, the present invention also provides a rear floor assembly, as shown in fig. 4, which includes the rear floor skeleton structure 10, the rear floor panel 20, two threshold beams 30 and two rear energy-absorbing boxes 40. The rear floor panel 20 is connected to the middle of the rear floor skeleton structure 10; the two rocker beams 30 are respectively connected to the front parts 111 of the two side sill bodies 110; the two rear crash boxes are respectively connected to the rear portions 112 of the two side member bodies 110.

Since the rear side member assembly 100 is formed as one-piece, the transmission of the collision force to the rear floor skeleton structure 10 is more continuous in the event of a collision. Thus, the rear floor skeleton structure 10 can disperse the impact force to the rear floor panel 20, the rear crash box 40 and the rocker beam 30, and finally absorb the impact energy through other portions of the vehicle body, so as to improve the rigidity and NVH performance of the vehicle body.

When the vehicle is impacted by the tail, the rear energy absorption box 40 firstly bears the impact force, and the rear energy absorption box 40 can absorb part of the energy of the impact force to play a role in buffering. The force transmitted from the rear energy absorption box 40 can be transmitted to the rear floor skeleton structure 10 through the rear side member assembly 100. Since the rear side member assembly 100 is of an integral structure without a welded joint, a transmission path of the collision force on the rear floor skeleton structure 10 is more continuous, so as to improve the collision performance of the rear floor skeleton structure 10.

The rear energy absorption box 40 can adopt a structure with a cross section in a shape like a Chinese character 'ri', so that the rear energy absorption box is convenient to machine and form and is beneficial to improving the integral strength of the rear energy absorption box 40. Specifically, the rear energy absorption box 40 is made of an aluminum alloy section with a cross section shaped like a Chinese character 'ri'.

In one embodiment, as shown in fig. 4 to 5, both ends of the rear floor panel 20 in the longitudinal direction of the stringer body 110 are connected to the middle cross member 300 and the rear cross member 400 by self-piercing riveting, and both ends of the rear floor panel 20 perpendicular to the longitudinal direction of the stringer body 110 are connected to the stringer bodies 110 by hot-melt self-tapping screws.

By utilizing the above connection mode, the middle parts of the rear floor panel 20 and the rear floor framework structure 10 are overlapped along the length direction of the vehicle body, so that the connection strength between the rear floor framework structure 10 and the rear floor panel 20 can be increased, and it is ensured that the rear floor panel 20 cannot be disconnected from the rear floor framework structure 10 and separated when the vehicle body is subjected to a larger collision working condition, and the reliability of the vehicle body connection structure is improved.

In one embodiment, as shown in fig. 4-5, the rocker beam 30 is connected to the front portion 111 by a fastener 50 and a first heat-fusible, self-tapping screw 60; the rear crash box 40 is connected to the rear portion 112 by a second hot melt self-tapping screw 70.

By means of the connection mode, the threshold beam 30 and the front portion 111 are arranged in an overlapped mode along the length direction of the vehicle body, so that the connection strength between the front portion 111 and the threshold beam 30 can be increased, the threshold beam 30 cannot be separated from the front portion 111 due to disconnection when the threshold beam is subjected to a large collision working condition, and the connection reliability is improved. Similarly, the rear energy-absorbing box 40 and the rear part 112 are overlapped along the length direction of the vehicle body, so that the connection strength between the rear part 112 and the rear energy-absorbing box 40 can be increased, the rear energy-absorbing box 40 cannot be disconnected from the rear part 112 to be separated when the vehicle is subjected to a larger collision working condition, and the connection reliability is improved.

Specifically, the front portion 111 includes a side standing plate 1111 and a top plate 1112 vertically connected to the top of the side standing plate 1111, adjacent sides of the rocker 30 are respectively attached to the side standing plate 1111 and the top plate 1112, the rocker 30 and the side standing plate 1111 are connected by a fastener 50, and the rocker 30 and the top plate 1112 are connected by a first hot-melt self-tapping screw 60; the rear portion 112 is a U-shaped groove with an outward opening, and the rear energy-absorbing box 40 is partially embedded in the U-shaped groove and connected by a second hot-melt self-tapping screw 70, wherein the fastener 50 may be a bolt, the axial direction of the bolt is along the width direction of the vehicle body, and the axial directions of the first hot-melt self-tapping screw 60 and the second hot-melt self-tapping screw 70 are both along the height direction of the vehicle body.

By the above connection manner, the connection strength of the rear floor panel 20, the rear crash boxes 40 and the rocker beams 30 with the rear floor skeleton structure 10 can be effectively improved.

In one particular embodiment, as shown in FIGS. 4 and 6, the rear floor assembly further includes a rear impact beam 80, the rear impact beam 80 being attached to the ends of the two crash boxes remote from the rear portion 112.

By providing the rear impact beam 80, when the vehicle is impacted by the rear part, the rear impact beam 80 is firstly impacted by the impact force, and the rear energy-absorbing box 40 can absorb part of the energy of the impact force to play a role in buffering. The force transmitted by the rear anti-collision beam 80 and the rear energy-absorbing box 40 can be transmitted to the threshold beam 30 through the rear longitudinal beam assembly 100, and the force transmitted by the rear anti-collision beam 80 and the rear energy-absorbing box 40 can be transmitted to the rear floor panel 20, the shock absorption tower 120, the front cross beam 200, the middle cross beam 300 and the rear cross beam 400 through the longitudinal beam body 110, so that collision energy is absorbed by other parts of the vehicle body, the force transmission performance of the vehicle is effectively improved, the rigidity and NVH performance of the vehicle body are improved, and the driving performance and the comfort of the vehicle are better.

In accordance with another aspect of the present invention, embodiments of the present invention further provide a vehicle including the rear floor frame structure 10 or the rear floor assembly.

Since the vehicle includes the rear floor framework 10 or the rear floor assembly, the advantages and benefits of the rear floor framework 10 or the rear floor assembly in the above embodiments are also provided, and will not be described in detail herein.

All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A rear floor framework structure is characterized by comprising two rear longitudinal beam assemblies and at least one cross beam;

the rear longitudinal beam assemblies comprise longitudinal beam bodies and damping towers integrally formed on the longitudinal beam bodies, and the two rear longitudinal beam assemblies are arranged at intervals in the width direction of the longitudinal beam bodies; the at least one cross beam is connected between the two longitudinal beam bodies, one side of each longitudinal beam body, which is far away from the cross beam, is of a U-shaped structure, and an energy absorption structure is arranged at the rear part, close to the longitudinal beam bodies, of the inside of each U-shaped structure.

2. The rear floor skeleton structure of claim 1, wherein the energy absorbing structure comprises ribs intermittently disposed vertically and/or diagonally.

3. The rear floor skeleton structure of claim 2, wherein a reinforcing structure is further provided inside the U-shaped structure; the energy absorption structure is located between the shock absorption tower and the rear portion, and the reinforcing structure is located between the shock absorption tower and the front portion of the longitudinal beam body.

4. The rear floor skeleton structure of claim 1, wherein the longitudinal beam body and the shock absorption tower are integrally formed by high-pressure casting of aluminum or aluminum alloy.

5. The rear floor skeleton structure of any one of claims 1 to 4, wherein a plurality of reinforcing ribs are arranged on at least one of the shock absorption tower and the cross beam in a criss-cross distribution.

6. A rear floor assembly, comprising:

the rear floor skeletal structure of any of claims 1-5;

7. The rear floor assembly as set forth in claim 6, wherein said rocker beam is connected to said front portion by a fastener and a first heat-fusible self-tapping screw; the rear energy absorption box is connected with the rear part through a second hot-melt self-tapping screw.

8. A rear floor assembly according to claim 6 or 7, further comprising a rear impact beam connected to the ends of the two energy absorption boxes remote from the rear portion.

9. A vehicle comprising a rear floor skeleton structure according to any one of claims 1 to 5 or comprising a rear floor assembly according to any one of claims 6 to 8.