Vehicle body rear floor structure and vehicle having the same

Abstract

The present invention provides a vehicle body rear floor structure and a vehicle having the same, comprising: a rear floor assembly, the rear floor assembly comprising a rear floor and two rear wheel cover inner plate structures; a shock absorber mounting hole and a shock absorber fixing structure are provided on the surface of the rear wheel cover inner plate structure protruding toward the top of the vehicle body; the rear floor and the rear wheel cover inner plate structure are integrally die-cast. The present application arranges the two rear wheel cover inner plate structures on both sides of the rear floor, respectively, and a shock absorber mounting hole and a shock absorber fixing structure are provided on the surface of the rear wheel cover inner plate structure protruding toward the top of the vehicle body; the rear floor and the rear wheel cover inner plate structure are integrally die-cast, so that the integral die-casting highly integrates the rear floor structure, and makes full use of the structural characteristics of the die-casting structure with variable cross-section and unequal material thickness to form a high-rigidity cage structure, effectively bear and transmit the vehicle body load, ensure the structural reliability and durability of the rear floor, optimize the dimensional accuracy of the rear floor, and improve the vehicle body rigidity and vehicle handling stability.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a vehicle body rear floor structure and a vehicle having the same. Background Art

[0002] The rear floor is a major component of the vehicle body. The road excitation load is transmitted to the entire vehicle body through its longitudinal beams and wheel arches. The force transmission path of the rear floor and its own strength and stiffness directly affect the reliability, durability, handling stability and driving of the vehicle.

[0003] The high-positioned spring and shock absorber integrated (high-elasticity) suspension improves the integration of the suspension and optimizes the suspension layout space. It can leave space to solve the layout space problem of components that improve handling performance, such as rear-wheel steering and active stabilizer bars, and can also reduce the impact of increased chassis functions on the volume of the trunk. In the rear suspension with spring-shock separation, the road excitation load is carried by the rear longitudinal beam and the rear wheel cover. Since the spring and shock absorber are integrated on one axis, the road excitation load is also concentrated on the rear wheel cover. The height of the fixed point is relatively higher than that of the body of the spring-shock separation suspension, which is very unfavorable to the torsional stiffness of the body. The reduction of torsional stiffness will affect the stability of the bracket and driving; in addition, the load in the rear wheel cover area is also greatly increased, and even if the load exceeds the standard locally, it will cause damage to the body.

[0004] The traditional rear floor adapted to high-elasticity suspension adopts a steel plate stamping and welding structure or a partially aluminum alloy die-casting structure. The various components are connected by spot welding, SPR (self-piercing riveting), FDS (hot melt self-tapping), etc. The overall stiffness performance is limited, and the torsional stiffness is difficult to improve, which directly affects the driving performance of the whole vehicle; because the number of connection points is limited, the overall force transmission effect is also limited. When there are process defects in individual connection points, the risk of local damage leading to damage to the vehicle body is relatively high. In addition, the traditional rear floor structure has a large number of parts, and the dimensional tolerance is easy to accumulate and transmit. The dimensional accuracy control of the assembly is relatively difficult. The dimensional tolerance may also affect the accuracy of the system matching, which may cause problems such as abnormal noise during driving.

[0005] Currently, no effective solution has been proposed for the above technical problems. Summary of the invention

[0006] The main purpose of the present invention is to provide a vehicle body rear floor structure and a vehicle having the same, so as to solve the problem of poor vehicle body rigidity and vehicle handling stability caused by too low dimensional accuracy of the rear vehicle floor in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a vehicle body rear floor structure is provided, including: a rear floor assembly, the rear floor assembly includes a rear floor and two rear wheel housing inner panel structures, the two rear wheel housing inner panel structures are respectively arranged on both sides of the rear floor, the rear floor is extended along the length direction of the vehicle body, and at least part of the rear wheel housing inner panel structure is extended along the height direction of the vehicle body; a shock absorber mounting hole and a shock absorber fixing structure are provided on the surface of the rear wheel housing inner panel structure protruding toward the top of the vehicle body, the shock absorber mounting hole is used to install a suspension spring shock absorber integrated structure, the shock absorber fixing structure is arranged adjacent to the shock absorber mounting hole, the shock absorber fixing structure is used to fix the suspension spring shock absorber integrated structure, and a parcel shelf crossbeam assembly is arranged between the two shock absorber fixing structures; wherein, the rear floor and the rear wheel housing inner panel structure are integrally die-cast.

[0008] Furthermore, the rear floor includes: a rear longitudinal beam, which is extended along the length direction of the vehicle body and connected to the inner panel structure of the rear wheel housing, and there are two rear longitudinal beams; a first cross beam, a second cross beam, a third cross beam and a fourth cross beam are sequentially arranged between the two rear longitudinal beams along the length direction of the rear longitudinal beam, and the first cross beam, the second cross beam, the third cross beam and the fourth cross beam are all extended along the width direction of the vehicle body, wherein the first cross beam is connected to the end of the rear longitudinal beam, and the third cross beam is correspondingly arranged with the parcel rack cross beam assembly in the height direction of the vehicle body; at least one of the junction of the rear longitudinal beam and the second cross beam and the junction of the rear longitudinal beam and the fourth cross beam is provided with a rear subframe fixing point.

[0009] Furthermore, a rear floor plane area is arranged between the second cross beam and the fourth cross beam, and the rear floor plane area includes a first thickness area and a second thickness area. There is at least one first thickness area, and the thickness of the first thickness area in the vehicle body height direction is greater than the thickness of the second thickness area in the vehicle body height direction.

[0010] Furthermore, at least one battery fixing portion is provided at the bottom of the second cross beam, and the battery fixing portion is used to fix the vehicle-mounted battery.

[0011] Furthermore, at least one transverse reinforcement rib is provided at the junction of the third cross beam and the rear longitudinal beam, and at least part of the transverse reinforcement rib extends along the vehicle body height direction to the rear wheel housing inner panel structure.

[0012] Furthermore, a mesh rib structure is provided in the plane area of ​​the rear floor.

[0013] Furthermore, at least one of the rear longitudinal beam, the first cross beam, the second cross beam, and the fourth cross beam is provided with a reinforcement structure, and the reinforcement structure includes at least one of a cross-shaped reinforcement rib, a herringbone reinforcement rib, and an H-shaped reinforcement rib.

[0014] Furthermore, the rear floor structure of the vehicle body also includes: a wheel arch oblique tie bar, there is at least one wheel arch oblique tie bar, one end of the wheel arch oblique tie bar is connected to the rear longitudinal beam, and the other end of the wheel arch oblique tie bar is connected to the shock absorber fixing structure; a wheel arch cross reinforcement rib, the wheel arch cross reinforcement rib is arranged near the bottom of the rear wheel arch inner panel structure in the height direction of the vehicle body.

[0015] Furthermore, the shock absorber fixing structure includes: a shock absorber fixing hole, there are multiple shock absorber fixing holes, and the multiple shock absorber fixing holes are distributed along the circumference of the shock absorber mounting hole, and the shock absorber fixing holes are arranged at a distance from the hole wall of the shock absorber mounting hole; a fixed point annular reinforcement rib, the fixed point annular reinforcement rib is arranged around the shock absorber fixing hole; a first annular reinforcement rib, the first annular reinforcement rib is extended around the circumference of the shock absorber mounting hole, and the first annular reinforcement rib is tangent to the end of the fixed point annular reinforcement rib close to the shock absorber mounting hole; a second annular reinforcement rib, the second annular reinforcement rib is extended along the circumference of the shock absorber mounting hole, and the second annular reinforcement rib is tangent to the farthest point of the fixed point annular reinforcement rib away from the shock absorber mounting hole; a radial reinforcement rib, the radial reinforcement rib is extended along the radial direction of the shock absorber mounting hole, and there are multiple radial reinforcement ribs.

[0016] According to another aspect of the present invention, a vehicle is provided. The vehicle has a vehicle body rear floor structure, and the vehicle body rear floor structure is the above-mentioned vehicle body rear floor structure.

[0017] By applying the technical solution of the present invention, two rear wheel cover inner panel structures are respectively arranged on both sides of the rear floor, at least a part of the rear wheel cover inner panel structure is extended in the height direction of the vehicle body, and a shock absorber mounting hole and a shock absorber fixing structure are provided on the surface of the rear wheel cover inner panel structure protruding toward the top of the vehicle body. The rear floor and the rear wheel cover inner panel structure are die-cast as an integral whole, so that the integral die-casting highly integrates the rear floor structure, and fully utilizes the structural characteristics of the die-casting structure with variable cross-section and unequal material thickness to form a high-rigidity cage structure, which effectively bears and transmits the vehicle body load, ensures the structural reliability and durability of the rear floor, optimizes the dimensional accuracy of the rear floor, and improves the vehicle body rigidity and the stability of vehicle handling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of a first embodiment of a vehicle body rear floor structure according to the present invention is shown;

[0020] Figure 2 It shows a structural schematic diagram of a second embodiment of a vehicle body rear floor structure according to the present invention;

[0021] Figure 3 Shows Figure 2 The enlarged schematic diagram of point A in the middle;

[0022] Figure 4 A schematic structural diagram of a third embodiment of a vehicle body rear floor structure according to the present invention is shown;

[0023] Figure 5 A schematic structural diagram of a fourth embodiment of a vehicle body rear floor structure according to the present invention is shown;

[0024] Figure 6 A schematic structural diagram of a fifth embodiment of a vehicle body rear floor structure according to the present invention is shown.

[0025] The above drawings include the following reference numerals:

[0026] 1. Suspension spring shock absorber integrated structure;

[0027] 2. Rear floor; 22. Shock absorber fixing structure; 221. Shock absorber fixing hole; 222. First annular reinforcement rib; 223. Second annular reinforcement rib; 224. Radial reinforcement rib; 225. Fixed point annular reinforcement rib;

[0028] 211, first cross beam; 213, third cross beam; 214, reinforcing ribs; 215, mesh ribs; 231, wheel cover oblique reinforcement ribs; 232, wheel cover cross reinforcement ribs; 233, longitudinal beam herringbone ribs; 241, second cross beam; 242, fourth cross beam;

[0029] 24, rear longitudinal beam; 243, front longitudinal beam section; 244, middle longitudinal beam section; 245, rear longitudinal beam section;

[0030] 246, rear subframe fixing point; 247, first thickness area; 248, second thickness area; 249, battery fixing part;

[0031] 3. Parcel shelf crossbeam assembly; 31. Parcel shelf middle crossbeam; 32. Parcel shelf left and right crossbeams. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0036] Combination Figures 1 to 6 As shown, according to a specific embodiment of the present application, a vehicle body rear floor structure is provided.

[0037] Specifically, a vehicle body rear floor structure includes: a rear floor assembly, the rear floor assembly includes a rear floor 2 and two rear wheel housing inner panel structures, the two rear wheel housing inner panel structures are respectively arranged on both sides of the rear floor 2, the rear floor 2 is extended along the length direction of the vehicle body, and at least part of the rear wheel housing inner panel structure is extended along the height direction of the vehicle body; a shock absorber mounting hole and a shock absorber fixing structure 22 are provided on the surface of the rear wheel housing inner panel structure protruding toward the top of the vehicle body, the shock absorber mounting hole is used to install a suspension spring shock absorber integrated structure 1, the shock absorber fixing structure 22 is arranged adjacent to the shock absorber mounting hole, the shock absorber fixing structure 22 is used to fix the suspension spring shock absorber integrated structure 1, and a parcel shelf crossbeam assembly 3 is arranged between the two shock absorber fixing structures 22; wherein, the rear floor 2 and the rear wheel housing inner panel structure are integrally die-cast.

[0038] In this embodiment, Figure 1 , Figure 2 As shown, two rear wheel cover inner panel structures are respectively arranged on both sides of the rear floor, at least part of the rear wheel cover inner panel structure is extended in the height direction of the vehicle body, and a shock absorber mounting hole and a shock absorber fixing structure are provided on the surface of the rear wheel cover inner panel structure protruding toward the top of the vehicle body. The rear floor and the rear wheel cover inner panel structure are die-cast as an integral whole, so that the integral die-casting highly integrates the rear floor structure and fully utilizes the structural characteristics of the die-casting structure with variable cross-section and unequal material thickness to form a high-rigidity cage structure, which effectively bears and transmits the vehicle body load, ensures the structural reliability and durability of the rear floor, optimizes the dimensional accuracy of the rear floor, and improves the vehicle body rigidity and the stability of vehicle handling.

[0039] like Figure 3As shown, the rear floor 2 includes: a rear longitudinal beam 24, which is extended along the length direction of the vehicle body and connected to the inner plate structure of the rear wheel housing, and there are two rear longitudinal beams 24; a first cross beam 211, a second cross beam 241, a third cross beam 213 and a fourth cross beam 242 are sequentially arranged between the two rear longitudinal beams 24 along the length direction of the rear longitudinal beam 24, and the first cross beam 211, the second cross beam 241, the third cross beam 213 and the fourth cross beam 242 are all extended along the width direction of the vehicle body, wherein the first cross beam 211 is connected to the end of the rear longitudinal beam 24, and the third cross beam 213 is correspondingly arranged with the parcel shelf cross beam assembly 3 in the height direction of the vehicle body; at least one of the junctions of the rear longitudinal beam 24 and the second cross beam 241 and the junctions of the rear longitudinal beam 24 and the fourth cross beam 242 is provided with a rear subframe fixing point 246. In this embodiment, between the left and right rear longitudinal beams, there are four cross beam structures, namely, the first cross beam 211, the second cross beam 241, the third cross beam 213 and the fourth cross beam 242, which are distributed front and back, and all of the four cross beams have an inverted U-shaped cross section. The first cross beam 211 is located at the front end of the rear floor, the second cross beam 241 is located between the front fixing points of the rear subframe, and the fourth cross beam 242 is located between the rear fixing points of the rear subframe. The first cross beam 211, the second cross beam 241 and the fourth cross beam 242 are provided with herringbone reinforcement ribs. The third cross beam 213 is located below the parcel shelf cross beam assembly 3 and is formed by the arc shape of the raised surface of the die casting. The cross beam part needs to have sufficient thickness and no reinforcement ribs are provided inside. The rear floor is provided with four rear subframe fixing points 246, all of which are located at the junction of the cross beam and the longitudinal beam, making the rear floor more stable. In addition, the parcel shelf crossbeam assembly 3 is composed of a parcel shelf middle crossbeam 31 and a parcel shelf left and right crossbeams 32 which are spot-welded together, and the parcel shelf crossbeam assembly 3 is connected to the rear floor 2 by SPR (self-piercing rivets) and FDS (hot-melt self-tapping).

[0040] Furthermore, a rear floor plane area is provided between the second cross beam 241 and the fourth cross beam 242, and the rear floor plane area includes a first thickness area 247 and a second thickness area 248. There is at least one first thickness area 247, and the thickness of the first thickness area 247 in the vehicle height direction is greater than the thickness of the second thickness area 248 in the vehicle height direction. The first thickness area 247 can optimize the aluminum liquid fluidity and cooling speed of the large-area plane area, and achieve a better filling effect of the casting.

[0041] like Figure 3 As shown, at least one battery fixing portion 249 is provided at the bottom of the second cross beam 241, and the battery fixing portion 249 is used to fix the vehicle-mounted battery. This arrangement ensures that the vehicle-mounted battery can be firmly and reliably fixed at the battery fixing portion 249 on the second cross beam 241. The battery fixing portion 249 is arranged at the bottom of the second cross beam 241, and the vehicle body load at the battery fixed point can be dispersed to a larger vehicle body range through the above-mentioned "cage-type rear floor" force transmission structure, so as to meet the reliability and durability requirements of the battery fixing portion 249.

[0042] In an exemplary embodiment of the present application, two battery fixing portions 249 are provided at the bottom of the second beam 241 . The battery fixing portions 249 are located at the root of the second beam 241 . The fixing points are in an 8-shape and are staggered with the herringbone reinforcement ribs of the second beam 241 .

[0043] Furthermore, at least one transverse reinforcing rib 214 is provided at the junction of the third cross beam 213 and the rear longitudinal beam 24, and at least part of the transverse reinforcing rib 214 extends to the rear wheel housing inner plate structure along the vehicle body height direction. In this embodiment, three transverse reinforcing ribs are provided at the junction of the two sides of the third cross beam 213 and the rear longitudinal beam 24, and the reinforcing ribs should cross the junction position of the two and extend to a certain height toward the wheel housing, so that the third cross beam is more stable and not easily deformed.

[0044] Specifically, the rear floor plane area is provided with a mesh rib structure 215. This arrangement can improve the rigidity of the large plane area of ​​the one-piece die-cast floor, reduce deformation during cooling, weaken the impact marks of the die-cast aluminum liquid, and improve the appearance quality of the parts.

[0045] Furthermore, at least one of the rear longitudinal beam 24, the first cross beam 211, the second cross beam 241, and the fourth cross beam 242 is provided with a reinforcement structure, and the reinforcement structure includes at least one of a cross reinforcement rib, a herringbone reinforcement rib, and an H-shaped reinforcement rib. This arrangement can improve the torsion resistance and enhance the rigidity of the rear floor and the vehicle body.

[0046] like Figure 5 As shown, the rear floor structure of the vehicle body also includes: a wheel arch oblique tie bar 231, there is at least one wheel arch oblique tie bar 231, one end of the wheel arch oblique tie bar 231 is connected to the rear longitudinal beam 24, and the other end of the wheel arch oblique tie bar 231 is connected to the shock absorber fixing structure 22; a wheel arch cross reinforcement rib 232, the wheel arch cross reinforcement rib 232 is arranged close to the bottom of the rear wheel arch inner plate structure in the height direction of the vehicle body. In this embodiment, the third cross beam 213, transverse reinforcement ribs 214, wheel house oblique reinforcement ribs 231, shock absorber fixing structure 22 and parcel shelf cross beam assembly 3 of the invention form an intermediate annular force transmission structure, the wheel house, shock absorber fixing structure 22, wheel house oblique reinforcement ribs 231, wheel house cross reinforcement ribs 232, and longitudinal beam middle section 244 form annular force transmission structures on both sides, the longitudinal beam rear section 245 and the rear surround form a rear annular force transmission structure, the shock absorber fixing structure 22 and the wheel house form four longitudinal force transmission paths on both sides, and are connected in series with the five annular force transmission paths to form a "cage-type rear floor" force transmission structure.

[0047] like Figure 3As shown, the shock absorber fixing structure 22 includes: a shock absorber fixing hole 221, a plurality of shock absorber fixing holes 221, and the plurality of shock absorber fixing holes 221 are arranged along the circumference of the shock absorber mounting hole, and a fixed point annular reinforcement rib 225 is arranged at a distance between the shock absorber fixing hole 221 and the hole wall of the shock absorber mounting hole, and the fixed point annular reinforcement rib 225 is arranged around the shock absorber fixing hole 221; a first annular reinforcement rib 222, and the first annular reinforcement rib 222 is arranged to extend around the circumference of the shock absorber mounting hole. , and the first annular reinforcement rib 222 is tangent to the end of the fixed point annular reinforcement rib 225 close to the shock absorber mounting hole; the second annular reinforcement rib 223, the second annular reinforcement rib 223 is extended along the circumference of the shock absorber mounting hole, and the second annular reinforcement rib 223 is tangent to the farthest point of the fixed point annular reinforcement rib 225 away from the shock absorber mounting hole; the radial reinforcement rib 224, the radial reinforcement rib 224 is extended along the radial direction of the shock absorber mounting hole, and there are multiple radial reinforcement ribs 224. In this embodiment, the first annular reinforcement rib 222, the second annular reinforcement rib 223, and the fixed point annular reinforcement rib 225 form a "planetary gear shape" structure, and the "spider web structure" formed by the combined radial reinforcement rib 224 can evenly disperse the stress from the fixed point to the entire wheel cover top surface area, and then disperse it to a larger vehicle body range through the above-mentioned "cage-type rear floor" force transmission structure, so as to meet the requirements of reliability and durability of the shock absorber fixing structure 22 area.

[0048] In another embodiment of the present application, the rear floor structure of the vehicle body also includes a longitudinal beam herringbone rib 233, a longitudinal beam front section 243, a longitudinal beam middle section 244 and a longitudinal beam rear section 245. Among them, the longitudinal beam front section 243 is provided with a cross rib to improve the force transmission performance of the longitudinal beam in front collision conditions and improve the front collision safety. The longitudinal beam rear section 245 is provided with H-shaped parallel reinforcement ribs to improve the crushing energy absorption performance of the rear longitudinal beam in rear collision and improve the rear collision safety. The longitudinal beam middle section 244 is provided with a herringbone reinforcement rib to improve the torsion resistance and improve the stiffness of the rear floor and vehicle body.

[0049] In another embodiment of the present application, a vehicle is provided. The vehicle has a vehicle body rear floor structure, and the vehicle body rear floor structure is the above-mentioned vehicle body rear floor structure.

[0050] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0051] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0052] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vehicle body rear floor structure, characterized in that: include: A rear floor assembly, the rear floor assembly comprising a rear floor (2) and two rear wheel housing inner panel structures, the two rear wheel housing inner panel structures being respectively arranged on both sides of the rear floor (2), the rear floor (2) extending in a vehicle body length direction, and at least a portion of the rear wheel housing inner panel structures extending in a vehicle body height direction; A shock absorber mounting hole and a shock absorber fixing structure (22) are provided on the surface of the rear wheel housing inner plate structure protruding toward the top of the vehicle body, the shock absorber mounting hole being used to mount a suspension spring shock absorber integrated structure (1), the shock absorber fixing structure (22) being arranged adjacent to the shock absorber mounting hole, the shock absorber fixing structure (22) being used to fix the suspension spring shock absorber integrated structure (1), and a parcel shelf crossbeam assembly (3) being arranged between the two shock absorber fixing structures (22); Wherein, the rear floor (2) and the rear wheel housing inner plate structure are integrally die-cast; The rear floor (2) comprises: a rear longitudinal beam (24), the rear longitudinal beam (24) extending along the length direction of the vehicle body, the rear longitudinal beam (24) being connected to the rear wheel housing inner plate structure, and there are two rear longitudinal beams (24); A first cross beam (211), a second cross beam (241), a third cross beam (213) and a fourth cross beam (242) are sequentially arranged between the two rear longitudinal beams (24) along the length direction of the rear longitudinal beams (24); the first cross beam (211), the second cross beam (241), the third cross beam (213) and the fourth cross beam (242) are all extended along the width direction of the vehicle body; the first cross beam (211) is connected to the end of the rear longitudinal beam (24); the third cross beam (213) and the parcel shelf cross beam assembly (3) are arranged correspondingly in the height direction of the vehicle body; At least one of the junctions of the rear longitudinal beam (24) and the second cross beam (241) and the junctions of the rear longitudinal beam (24) and the fourth cross beam (242) is provided with a rear subframe fixing point (246); At least one transverse reinforcing rib (214) is provided at the junction of the third cross beam (213) and the rear longitudinal beam (24); The vehicle body rear floor structure also includes: A longitudinal beam herringbone bar (233), a longitudinal beam front section (243), a longitudinal beam middle section (244) and a longitudinal beam rear section (245); A wheel house oblique tie bar (231), wherein there is at least one wheel house oblique tie bar (231), one end of the wheel house oblique tie bar (231) is connected to the rear longitudinal beam (24), and the other end of the wheel house oblique tie bar (231) is connected to the shock absorber fixing structure (22); A wheel cover cross reinforcement rib (232), the wheel cover cross reinforcement rib (232) being arranged close to the bottom of the rear wheel cover inner plate structure in the vehicle body height direction; The third cross beam (213), the transverse reinforcement ribs (214), the wheel housing oblique reinforcement ribs (231), the shock absorber fixing structure (22) and the parcel shelf cross beam assembly (3) form an intermediate annular force transmission structure; the wheel housing, the shock absorber fixing structure (22), the wheel housing oblique reinforcement ribs (231), the wheel housing cross reinforcement ribs (232) and the longitudinal beam middle section (244) form annular force transmission structures on both sides; the longitudinal beam rear section (245) and the rear enclosure form a rear annular force transmission structure; the shock absorber fixing structure (22) and the wheel housing form four longitudinal force transmission paths on both sides.

2. The vehicle body rear floor structure according to claim 1, characterized in that: A rear floor plane area is provided between the second cross beam (241) and the fourth cross beam (242), and the rear floor plane area includes a first thickness area (247) and a second thickness area (248), the first thickness area (247) being at least one, and the thickness of the first thickness area (247) in the vehicle body height direction is greater than the thickness of the second thickness area (248) in the vehicle body height direction.

3. The vehicle body rear floor structure according to claim 1, characterized in that: At least one battery fixing portion (249) is provided at the bottom of the second crossbeam (241), and the battery fixing portion (249) is used to fix the vehicle-mounted battery.

4. The vehicle body rear floor structure according to claim 1, characterized in that: At least part of the transverse reinforcing rib (214) extends along the vehicle body height direction to the rear wheel housing inner panel structure.

5. The vehicle body rear floor structure according to claim 2, characterized in that: The rear floor plane area is provided with a mesh rib (215) structure.

6. The vehicle body rear floor structure according to claim 2, characterized in that: At least one of the rear longitudinal beam (24), the first cross beam (211), the second cross beam (241), and the fourth cross beam (242) is provided with a reinforcement structure, wherein the reinforcement structure comprises at least one of a cross reinforcement rib, a herringbone reinforcement rib, and an H-shaped reinforcement rib.

7. The vehicle body rear floor structure according to claim 1, characterized in that: The shock absorber fixing structure (22) comprises: A shock absorber fixing hole (221), wherein the shock absorber fixing holes (221) are multiple, the multiple shock absorber fixing holes (221) are distributed along the circumference of the shock absorber mounting hole, and the shock absorber fixing holes (221) are arranged at a distance from the hole wall of the shock absorber mounting hole; A fixing point annular reinforcement rib (225), wherein the fixing point annular reinforcement rib (225) is arranged around the shock absorber fixing hole (221); a first annular reinforcing rib (222), the first annular reinforcing rib (222) being arranged to extend circumferentially around the shock absorber mounting hole, and the first annular reinforcing rib (222) being tangent to an end of the fixing point annular reinforcing rib (225) close to the shock absorber mounting hole; a second annular reinforcing rib (223), the second annular reinforcing rib (223) extending along the circumference of the shock absorber mounting hole, and the second annular reinforcing rib (223) is tangent to the farthest point of the fixed point annular reinforcing rib (225) away from the shock absorber mounting hole; Radial reinforcing ribs (224), the radial reinforcing ribs (224) extending radially along the shock absorber mounting hole, and the number of radial reinforcing ribs (224) is multiple.

8. A vehicle having a vehicle body rear floor structure, characterized in that: The vehicle body rear floor structure is the vehicle body rear floor structure according to any one of claims 1 to 7.

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