Vehicle body rear floor assembly and vehicle

Abstract

According to the vehicle body rear floor assembly and the vehicle, a rear floor framework assembly comprises a rear floor middle main body and a rear floor front cross beam, and the rear floor middle main body comprises rear floor longitudinal beams arranged on the left side and the right side respectively; the rear floor longitudinal beams are arranged on the two sides, the rear floor cross beam and the floor assembly are connected between the rear floor longitudinal beams on the two sides, the front end of each rear floor longitudinal beam is connected with a doorsill beam, the rear floor front cross beam is connected between the doorsill beams on the two sides and connected to the front side of the floor assembly, and the edge metal plate comprises a front metal plate connected to the front side of the rear floor front cross beam. The side metal plates are connected to the outer sides of the rear floor longitudinal beams, the front metal plate is connected between the threshold beams on the two sides, and the side metal plates and the rear floor longitudinal beams located on the same side are spliced to form a rear wheel cover. The vehicle body rear floor assembly can be applied to an existing production line, the machining cost is reduced, the application range is wide, and the vehicle body rear floor assembly is beneficial to reducing the production cost of a vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, and in particular to a vehicle body rear floor assembly. Meanwhile, the utility model also relates to a vehicle using the vehicle body rear floor assembly. Background Art

[0002] One-piece die-casting technology is an emerging production method for automotive parts. It uses casting to produce automotive parts and can integrate multiple different parts together through one-time die-casting. Die-casting can not only greatly improve the production efficiency of automotive parts and reduce production costs, but also help improve the structural strength of parts.

[0003] At present, among various automotive parts, such as the front engine compartment, rear floor and side panels, die-casting has begun to be used for production. Taking the rear floor as an example, the rear floor produced by die-casting can make the rear structure of the car more integrated and help improve the overall rigidity of the rear of the car.

[0004] However, the existing die-cast rear floor structure, the one-piece die-cast rear floor frame and rear floor, has a high degree of integration, but requires a larger die-casting machine. The existing die-casting machine is difficult to meet the die-casting requirements, and a one-time investment of over 100 million yuan is required, which has a high cost investment. The final assembly production line also needs to be improved to facilitate the connection with the side panel metal, front floor, etc., which also requires a large cost investment.

[0005] In addition, the existing die-cast rear floor structure cannot be common among different models on the same platform due to changes in the wheelbase of the vehicle model and the R point (design reference point) of the second row of seats. This will result in the need to open multiple new die-casting molds on the same platform, which will result in very high development costs. Utility Model Content

[0006] In view of this, the utility model aims to provide a vehicle body rear floor assembly to improve commonality and reduce production costs.

[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0008] A vehicle body rear floor assembly, comprising a rear floor frame assembly and edge sheet metal that are separately arranged;

[0009] The rear floor frame assembly includes a rear floor middle body and a rear floor front cross beam which are separately arranged, and the rear floor middle body includes rear floor longitudinal beams which are arranged on the left and right sides, and a rear floor cross beam and a floor assembly which are connected between the rear floor longitudinal beams on both sides;

[0010] The front end of each of the rear floor longitudinal beams is connected to a threshold beam, and the rear floor front cross beam is connected between the threshold beams on both sides and connected to the front side of the floor assembly;

[0011] Each of the edge sheet metals includes a front sheet metal connected to the front side of the front cross beam of the rear floor, and a side sheet metal connected to the outside of each of the rear floor longitudinal beams. The front sheet metal is connected between the door sill beams on both sides and is used to be connected to the front floor. The side sheet metal and the rear floor longitudinal beam located on the same side are assembled to form a rear wheel cover, and the side sheet metal is used to be connected to the side of the vehicle body.

[0012] Further, the rear floor longitudinal beam comprises a front section and a rear section connected front to rear, and each of the side sheet metals comprises a front section of the side sheet metal provided on the outside of the front section of the rear floor longitudinal beam, and a rear section of the side sheet metal provided on the outside of the rear section of the rear floor longitudinal beam;

[0013] The rear floor cross beam includes a rear floor middle cross beam and a rear floor rear cross beam, and the floor assembly includes a middle floor, a middle-rear floor connecting plate and a rear floor;

[0014] The rear floor middle cross beam, the middle rear floor connecting plate, and the rear floor rear cross beam are sequentially connected from front to rear and are located between the front sections of the rear floor longitudinal beams on both sides. The front sections of the rear floor longitudinal beams on both sides, the rear floor middle cross beam, the middle rear floor connecting plate, and the rear floor rear cross beam are die-cast to form an integrated structure.

[0015] A vacant portion is formed between the front sections of the rear floor longitudinal beams on both sides, the front cross beam of the rear floor and the middle cross beam of the rear floor, and the middle floor is sealed at the vacant portion; the rear floor is connected between the rear sections of the rear floor longitudinal beams on both sides.

[0016] Furthermore, the rear portion of the front section of each rear floor longitudinal beam is provided with an insertion groove opening toward the rear, the rear section of the rear floor longitudinal beam on each side is inserted into the insertion groove on the corresponding side, and each insertion groove is provided with a limiting portion for limiting the insertion depth of the rear section of the rear floor longitudinal beam; the rear end of the rear section of each rear floor longitudinal beam is connected to a mounting plate, and the mounting plate is provided with a mounting portion for mounting a rear anti-collision beam assembly.

[0017] Furthermore, a longitudinal beam groove is provided on the front section of each rear floor longitudinal beam, the longitudinal beam groove extends along the front-rear direction of the vehicle, and the middle part of the longitudinal beam groove is higher than the front and rear parts of the longitudinal beam groove;

[0018] The longitudinal beam groove body is provided with longitudinal reinforcing ribs in the longitudinal beam groove and transverse reinforcing ribs in the longitudinal beam groove. The longitudinal reinforcing ribs in the longitudinal beam groove are arranged in accordance with the shape of the longitudinal beam groove body. There are multiple transverse reinforcing ribs in the longitudinal beam groove. The multiple transverse reinforcing ribs in the longitudinal beam groove are arranged at intervals in the front and rear directions of the vehicle, and each transverse reinforcing rib in the longitudinal beam groove is arranged to intersect with the longitudinal reinforcing rib in the longitudinal beam groove.

[0019] Furthermore, a rear sub-frame mounting portion is respectively provided at the front and rear portions of the front section of each rear floor longitudinal beam, an air spring mounting portion is provided at the middle portion of the front section of each rear floor longitudinal beam, a plurality of longitudinal beam lower reinforcement ribs are provided between the air spring mounting portion and each rear sub-frame mounting portion, the plurality of longitudinal beam lower reinforcement ribs are arranged at intervals in the left rear direction of the vehicle, and each longitudinal beam lower reinforcement rib extends along the front and rear direction of the vehicle.

[0020] Furthermore, a middle floor rear side groove is provided between the two rear sub-frame mounting parts at the front, and a plurality of middle floor rear side reinforcing ribs are provided in the middle floor rear side groove, and the plurality of middle floor rear side reinforcing ribs are arranged in sequence in the left-right direction of the vehicle; and / or,

[0021] A rear cross beam channel body is provided between the two rear sub-frame mounting parts at the rear part, and a rear cross beam channel transverse reinforcing rib and a plurality of rear cross beam channel longitudinal reinforcing ribs are provided in the rear cross beam channel body; the rear cross beam channel transverse reinforcing ribs extend along the left-right direction of the vehicle, and the plurality of rear cross beam channel longitudinal reinforcing ribs are divided into a plurality of groups arranged along the left-right direction of the vehicle, and each group of the rear cross beam channel longitudinal reinforcing ribs includes two rear cross beam channel longitudinal reinforcing ribs arranged crosswise.

[0022] Furthermore, a middle cross beam channel is provided in the middle cross beam of the rear floor, a plurality of middle cross beam channel reinforcing ribs are provided in the middle cross beam channel, and the plurality of middle cross beam channel reinforcing ribs are arranged in sequence in the left-right direction of the vehicle.

[0023] Furthermore, a sill beam groove body is provided on the front section of the rear floor longitudinal beam and is arranged close to the sill beam, and the sill beam groove body extends along the front-rear direction of the vehicle;

[0024] The sill beam groove body is provided with a sill beam groove inner longitudinal reinforcing rib and a plurality of sill beam groove inner transverse reinforcing ribs, the sill beam groove inner longitudinal reinforcing ribs extend along the front-rear direction of the vehicle, and the plurality of sill beam groove inner transverse reinforcing ribs are arranged at intervals in the front-rear direction of the vehicle.

[0025] Furthermore, a front cross beam reinforcement plate is provided on the front side of the rear floor front cross beam, and the rear floor front cross beam and the front cross beam reinforcement plate are buckled to form a rear cross beam cavity, and the rear cross beam cavity extends in the left-right direction of the vehicle.

[0026] The vehicle body rear floor assembly described in the utility model sets the rear floor frame assembly and the edge sheet metal separately. The edge sheet metal can be made of steel plates, and the rear floor frame assembly can be formed by die-casting process. The parts that need to be die-cast are reduced, and the existing smaller-sized die-casting machines can be used to reduce production costs. In the final assembly workshop, there is no need to develop new production lines, and the existing production lines can be used to complete the assembly with the vehicle body side panels and the rear floor, which can also reduce production investment. The rear floor frame assembly includes the middle main body of the rear floor and the front cross beam of the rear floor, and the front cross beam of the rear floor is connected between the door sill beams on both sides. During the production process, it can adapt to the changes in the wheelbase and the R point of the second row of seats of various vehicle models. It has a high degree of versatility and is also conducive to reducing the production cost of the vehicle.

[0027] In addition, the rear floor longitudinal beam includes a front section of the rear floor longitudinal beam and a rear section of the rear floor longitudinal beam, and the rear floor is connected between the rear sections of the rear floor longitudinal beam. The middle rear floor connecting plate, the middle cross beam of the rear floor, the rear cross beam of the rear floor, and the front sections of the rear floor longitudinal beams on both sides are die-cast into an integrated structure. The die-casting can be completed using an existing die-casting machine, and the production cost is low. In addition, the length of the rear floor and the rear section of the rear floor longitudinal beam in the front-to-back direction of the vehicle can be adjusted according to the change in the rear length of different vehicle models, and the versatility is good, which is conducive to reducing the production cost of the vehicle. An insertion groove is set at the rear of the rear floor, and the rear section of the rear floor longitudinal beam is inserted into the insertion groove, which is convenient for connection. The set limit part is conducive to quickly finding the installation position of the rear section of the rear floor longitudinal beam, and the assembly efficiency is high. A mounting plate is set at the rear end of the rear section of the rear floor longitudinal beam to facilitate assembly with the existing rear anti-collision beam.

[0028] In addition, the longitudinal beam groove is conducive to ensuring the structural strength of the rear floor longitudinal beam, and the longitudinal reinforcement ribs and transverse reinforcement ribs in the longitudinal beam groove can serve as the reinforcement structure of the rear floor longitudinal beam to improve the structural strength of the rear floor longitudinal beam. The rear subframe mounting portion is convenient for installing the rear subframe, and the air spring mounting portion is convenient for installing the air spring. The longitudinal beam lower reinforcement ribs can conveniently improve the structural strength of the rear floor longitudinal beam and improve the force transmission performance of the rear floor longitudinal beam.

[0029] The rear groove of the middle floor and the rear reinforcement ribs of the middle floor are provided to improve the structural strength of the connection part with the middle floor. The rear cross beam groove, the transverse reinforcement ribs in the rear cross beam groove and the longitudinal reinforcement ribs in the rear cross beam groove are provided to improve the structural strength of the rear cross beam of the rear floor, thereby improving the force transmission performance of the vehicle. As for the sill beam groove, the longitudinal reinforcement ribs and the transverse reinforcement ribs in the sill beam groove, the structural strength of the connection part with the sill beam can be ensured. The front cross beam reinforcement plate can improve the structural strength of the front cross beam of the rear floor.

[0030] Another object of the present invention is to provide a vehicle, wherein the vehicle is provided with the vehicle body rear floor assembly as described above.

[0031] The vehicle described in the utility model has the same beneficial effects as the aforementioned vehicle body rear floor assembly relative to the prior art, and will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0033] Figure 1 This is a schematic structural diagram of a vehicle body rear floor assembly according to Embodiment 1 of the present utility model;

[0034] Figure 2 This is an exploded view of the vehicle body rear floor assembly according to the first embodiment of the utility model;

[0035] Figure 3 This is a schematic structural diagram of the middle body of the rear floor according to the first embodiment of the utility model;

[0036] Figure 4 for Figure 3 Schematic diagram of the structure from another perspective;

[0037] Figure 5 This is a schematic structural diagram of the rear floor longitudinal beam described in Example 1 of the utility model.

[0038] Description of reference numerals:

[0039] 1. Rear floor longitudinal beam; 101. Front section of rear floor longitudinal beam; 1011. Insertion slot; 1012. Limiting part; 1013. Longitudinal beam slot; 1014. Longitudinal reinforcement ribs in longitudinal beam slot; 1015. Transverse reinforcement ribs in longitudinal beam slot; 1016. Rear subframe mounting part; 1017. Air spring mounting part; 1018. Lower reinforcement ribs of longitudinal beam; 102. Rear section of rear floor longitudinal beam; 103. Rear slot of middle floor; 104. Rear reinforcement ribs of middle floor; 105. Door sill beam connection part; 106. Door sill beam slot; 107. Longitudinal reinforcement ribs in door sill beam slot; 108. Transverse reinforcement ribs in door sill beam slot;

[0040] 2. Front crossbeam of rear floor;

[0041] 3. Middle cross beam of rear floor; 301. Middle cross beam groove; 302. Reinforcement ribs in the middle cross beam groove;

[0042] 4. Rear floor rear crossbeam; 401. Rear crossbeam groove; 402. Transverse reinforcement ribs in the rear crossbeam groove; 403. Longitudinal reinforcement ribs in the rear crossbeam groove;

[0043] 5. Middle floor; 6. Middle and rear floor connecting plate; 7. Rear floor; 8. Door sill beam; 9. Front sheet metal;

[0044] 10. Side sheet metal; 1001. Front section of side sheet metal; 1002. Rear section of side sheet metal;

[0045] 11. Rear wheel cover; 12. Vacant area;

[0046] 13. Mounting plate; 1301. Anti-collision beam mounting portion; 14. Front cross beam reinforcement plate. DETAILED DESCRIPTION

[0047] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0048] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0050] In the description of the present utility model, the front-to-back direction is the front-to-back direction of the vehicle, usually refers to the length direction of the vehicle, the left-to-right direction is the left-to-right direction of the vehicle, usually refers to the width direction of the vehicle, and the up-down direction is the height direction of the vehicle. In the attached drawings: the arrow in front points to the head of the vehicle, the arrow in the back points to the tail of the vehicle, the arrow in the top points to the top of the vehicle, and the arrow in the bottom points to the bottom of the vehicle. Sitting in the driver's seat facing the front of the vehicle, the side where the left hand is located is the left side, and the side where the right hand is located is the right side. In the attached drawings, the arrow on the left points to the left side of the vehicle, and the arrow on the right points to the right side of the vehicle. The terms "inside" and "outside" are relative, where "inside" refers to the interior space of the vehicle, and "outside" refers to the outside of the vehicle body, that is, a position away from the interior space of the vehicle.

[0051] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0052] Embodiment 1

[0053] The present embodiment relates to a vehicle body rear floor assembly, which improves its own structure so that the vehicle body rear floor assembly has low production cost, low assembly cost, good versatility and good usability.

[0054] Based on the above design concept, an exemplary structure of the vehicle body rear floor assembly of this embodiment is as follows: Figure 1 and Figure 2 As shown, the vehicle body rear floor assembly includes a rear floor frame assembly and edge sheet metal that are separately arranged.

[0055] Among them, the rear floor frame assembly includes a separately arranged rear floor middle body and a rear floor front cross beam 2, the rear floor middle body includes rear floor longitudinal beams 1 arranged on the left and right sides, and a rear floor cross beam and a floor assembly connected between the rear floor longitudinal beams 1 on both sides, the front end of each rear floor longitudinal beam 1 is connected to a door sill beam 8, the rear floor front cross beam 2 is connected between the door sill beams 8 on both sides, and is located on the front side of the floor assembly.

[0056] The edge sheet metal includes a front sheet metal 9 connected to the front side of the front cross beam 2 of the rear floor, and a side sheet metal 10 connected to the outside of each rear floor longitudinal beam 1. The front sheet metal 9 is connected between the door sill beams 8 on both sides, and is used to connect to the front floor not shown in the figure. The side sheet metal 10 and the rear floor longitudinal beam 1 on the same side are assembled to form a rear wheel cover 11, and the side sheet metal 10 is used to connect to the side of the vehicle body not shown in the figure.

[0057] As a preferred embodiment, each rear floor longitudinal beam 1 includes a rear floor longitudinal beam front section 101 and a rear floor longitudinal beam rear section 102 connected front and rear, the aforementioned rear floor cross beam includes a rear floor middle cross beam 3 and a rear floor rear cross beam 4, the aforementioned floor assembly includes a middle floor 5, a middle rear floor connecting plate 6 and a rear floor 7, and each side sheet metal 102 includes a side sheet metal front section 1021 and a side sheet metal rear section 1002 connected front and rear, and the connecting parts of the side sheet metal front section 1001 and the side sheet metal rear section 1002 are welded together.

[0058] Among them, the rear floor middle cross beam 3, the middle rear floor connecting plate 6, and the rear floor rear cross beam 4 are connected in sequence from front to rear, and are connected between the front sections 101 of the rear floor longitudinal beams on both sides. The front sections 101 of the rear floor longitudinal beams on both sides, the rear floor middle cross beam 3, the middle rear floor connecting plate 6 and the rear floor rear cross beam 4 are die-cast into an integrated structure, and multiple components can be cast at one time, with a very high degree of integration, which can reduce the number of components, facilitate component management, and save the processing and assembly processes of each component.

[0059] In the description of this embodiment, the integrated structure is made of cast aluminum, which is light in weight and convenient for processing. The edge sheet metal is made of steel plate. The integrated structure and its surrounding parts are all connected by riveting. Except for the integrated structure and the edge sheet metal, the remaining components can all adopt the existing structures and materials, and the connection methods can all refer to the existing structures.

[0060] There is a vacant part 12 formed by enclosing the front sections 101 of the rear floor longitudinal beams on both sides, the front cross beam 2 of the rear floor, and the middle cross beam 3 of the rear floor. The middle floor 5 is blocked at the vacant part 12. The edge of the middle floor 5 overlaps with the edge of the vacant part 12 and is connected by riveting.

[0061] The rear floor 7 is connected between the rear sections 102 of the rear floor longitudinal beams on both sides. Specifically, the rear floor 7 can still adopt the existing material. The front part of the rear floor 7 overlaps on the rear cross beam 4 of the rear floor, and the left and right sides of the rear floor 7 are respectively connected to the rear sections 102 of the rear floor longitudinal beams.

[0062] Here, the rear floor longitudinal beam 1 includes the front section 101 and the rear section 102 of the rear floor longitudinal beam, and the rear floor 7 is connected between the rear sections 102 of the rear floor longitudinal beam. The middle and rear floor connecting plate 6, the middle cross beam 3 of the rear floor, the rear cross beam 4 of the rear floor, and the front sections 101 of the rear floor longitudinal beams on both sides are die-cast into an integrated structure. This integrated structure can integrate all the sheet metals in the existing rear floor longitudinal beam 1 and can be completed by using the existing die-casting machine, with low production cost. Moreover, the lengths of the rear floor 7 and the rear sections 102 of the rear floor longitudinal beam in the vehicle's front-rear direction can be adjusted according to the length change of the rear part of different vehicle models, with good versatility and conducive to reducing the production cost of the vehicle.

[0063] It should be noted here that since die-casting usually uses cast aluminum material, preferably, the rear section 102 of the rear floor longitudinal beam can adopt aluminum profile, which is separately arranged from the rear section 101 of the rear floor longitudinal beam. It can not only adjust the length according to different vehicle models, but also change the cross-sectional shape according to the rear collision strategy. For example, the cross-sectional shape of the rear section 102 of the rear floor longitudinal beam is in the shape of "day", "eye", "field", etc., and weakening grooves can also be opened on the rear section 102 of the rear floor longitudinal beam to improve the collision energy absorption effect.

[0064] For the convenience of processing, the front section 101 and the rear section 102 of the rear floor longitudinal beam are riveted together. The front section 101 of the rear floor longitudinal beam on the same side is riveted to the front section 1001 of the side sheet metal, and the connection method between the rear section 102 of the rear floor longitudinal beam and the rear section 1002 of the side sheet metal can refer to the existing structure.

[0065] As a preferred embodiment, as Figure 4As shown, the rear portion of each rear floor longitudinal beam front section 101 is provided with an insertion slot 1011 opening toward the rear, and the rear section 102 of the rear floor longitudinal beam on each side is inserted into the insertion slot 1011 on the corresponding side, and the two are connected by riveting or screwing. Each insertion slot 1011 is provided with a limiting portion 1012 for limiting the insertion depth of the corresponding rear floor longitudinal beam rear section 102.

[0066] In this structure, an insertion slot 1011 is provided at the rear of the rear floor 7, and the rear section 102 of the rear floor longitudinal beam is inserted into the insertion slot 1011, so that the rear section 102 of the rear floor longitudinal beam and the front section 101 of the rear floor longitudinal beam are conveniently connected, and the provided limiting portion 1012 is conducive to quickly finding the installation position of the rear section 102 of the rear floor longitudinal beam, and the assembly efficiency is high. In this embodiment, the limiting portion 1012 includes a protruding portion protruding inwardly on the side wall in the insertion slot 1011, and a reinforcing rib that separates the inner cavity of the rear section 102 of the rear floor longitudinal beam.

[0067] As a preferred embodiment, the rear end of each rear floor longitudinal beam rear section 102 is connected to a mounting plate 13, the mounting plate 13 is arranged orthogonally to the front-rear direction of the vehicle body, and an anti-collision beam mounting portion 1301 for mounting the rear anti-collision beam assembly is provided on the mounting plate 13. For example, the anti-collision beam mounting portion 1301 is a mounting hole, which is convenient for assembly with an existing rear anti-collision beam.

[0068] As a preferred embodiment, each rear floor longitudinal beam front section 101 is provided with a longitudinal beam groove 1013, the longitudinal beam groove 1013 extends in the front-rear direction of the vehicle, and the middle part of the longitudinal beam groove 1013 is higher than the front and rear parts of the longitudinal beam groove 1013. The longitudinal beam groove 1013 is provided with longitudinal beam groove inner longitudinal reinforcing ribs 1014 and longitudinal beam groove inner transverse reinforcing ribs 1015, the longitudinal beam groove inner longitudinal reinforcing ribs 1014 are arranged in accordance with the longitudinal beam groove 1013, and there are multiple longitudinal beam groove inner transverse reinforcing ribs 1015, and the multiple longitudinal beam groove inner transverse reinforcing ribs 1015 are arranged at intervals in the front-rear direction of the vehicle, and each longitudinal beam groove inner transverse reinforcing rib 1015 is arranged to intersect with the longitudinal beam groove inner longitudinal reinforcing rib 1014.

[0069] The longitudinal beam groove 1013 provided here is beneficial to ensuring the structural strength of the rear floor longitudinal beam 1, and the longitudinal reinforcing ribs 1014 and the transverse reinforcing ribs 1015 provided in the longitudinal beam groove can serve as the reinforcing structure of the rear floor longitudinal beam 1 to improve the structural strength of the rear floor longitudinal beam 1.

[0070] As a preferred embodiment, a rear subframe mounting portion 1016 is respectively provided at the front and rear portions of each rear floor longitudinal beam front section 101, an air spring mounting portion 1017 is provided at the middle portion of each rear floor longitudinal beam front section 101, and a plurality of longitudinal beam lower reinforcing ribs 1018 are provided between the air spring mounting portion 1017 and each rear subframe mounting portion 1016. The plurality of longitudinal beam lower reinforcing ribs 1018 are arranged at intervals in the left rear direction of the vehicle, and each longitudinal beam lower reinforcing rib 1018 extends along the front and rear direction of the vehicle.

[0071] In the above structure, the rear subframe mounting portion 1016 is provided to facilitate the installation of the rear subframe, and the air spring mounting portion 1017 is provided to facilitate the installation of the air spring. The lower longitudinal beam reinforcement rib 1018 is provided to facilitate improving the structural strength of the rear floor longitudinal beam 1 and improve the force transmission performance of the rear floor longitudinal beam 1.

[0072] As a preferred embodiment, a center floor rear side groove 103 is provided between the two rear sub-frame mounting parts 1016 at the front, and the center floor rear side groove 103 is integrated into the aforementioned one-piece structure. A plurality of center floor rear side reinforcing ribs 104 are provided in the center floor rear side groove 103, and the plurality of center floor rear side reinforcing ribs 104 are arranged in sequence in the left-right direction of the vehicle to improve the structural strength of the connection portion between the one-piece structure and the center floor 5.

[0073] As a preferred embodiment, a rear cross beam groove body 401 is provided between the two rear sub-frame mounting parts 1016 at the rear part, and a rear cross beam groove inner transverse reinforcement rib 402 and a plurality of rear cross beam groove inner longitudinal reinforcement ribs 403 are provided in the rear cross beam groove body 401. The rear cross beam groove inner transverse reinforcement rib 402 extends along the left-right direction of the vehicle, and the plurality of rear cross beam groove inner longitudinal reinforcement ribs 403 are divided into a plurality of groups arranged along the left-right direction of the vehicle, and each group of rear cross beam groove inner longitudinal reinforcement ribs 403 includes two rear cross beam groove inner longitudinal reinforcement ribs 403 arranged crosswise. The rear cross beam groove body 401, the rear cross beam groove inner transverse reinforcement rib 402, and the rear cross beam groove inner longitudinal reinforcement rib 403 provided here are conducive to improving the structural strength of the rear cross beam 4 of the rear floor, thereby improving the force transmission performance of the vehicle.

[0074] As a preferred embodiment, a middle cross beam groove 301 is provided in the middle cross beam 3 of the rear floor, and a plurality of middle cross beam groove reinforcing ribs 302 are provided in the middle cross beam groove 301. The plurality of middle cross beam groove reinforcing ribs 302 are arranged in sequence in the left-right direction of the vehicle.

[0075] As a preferred embodiment, a front cross beam reinforcement plate 14 is provided on the front side of the rear floor front cross beam 2. The rear floor front cross beam 2 and the front cross beam reinforcement plate 14 are buckled together to form a rear cross beam cavity. The rear cross beam cavity extends along the left and right directions of the vehicle, which can improve the structural strength of the rear floor front cross beam 2.

[0076] As a preferred embodiment, a sill beam connecting portion 105 is provided on the front section 101 of each rear floor longitudinal beam, and the sill beam connecting portion 105 is used to connect the sill beam 8. In the present embodiment, the sill beam connecting portion 105 includes an orthogonally arranged sill beam upper overlapping surface and a sill beam side overlapping surface, the sill beam upper overlapping surface overlaps the upper surface of the sill beam 8, and the sill beam side overlapping surface is overlapped and connected to the inner side surface of the sill beam 8 facing the interior of the vehicle.

[0077] As a preferred embodiment, each rear floor longitudinal beam front section 101 is provided with a sill beam groove body 106 arranged near the sill beam connection portion 105, the sill beam groove body 106 extends in the front-rear direction of the vehicle, and the sill beam groove body 106 is provided with a sill beam groove inner longitudinal reinforcing rib 107 and a plurality of sill beam groove inner transverse reinforcing ribs 108, the sill beam groove inner longitudinal reinforcing rib 107 extends in the front-rear direction of the vehicle, and the plurality of sill beam groove inner transverse reinforcing ribs 108 are arranged at intervals in the front-rear direction of the vehicle. In this structure, the sill beam groove body 106, the sill beam groove inner longitudinal reinforcing rib 107 and the plurality of sill beam groove inner transverse reinforcing ribs 108 can ensure the structural strength of the portion connected with the sill beam.

[0078] The vehicle body rear floor assembly of this embodiment has the rear floor frame assembly and the edge sheet metal separately arranged. The edge sheet metal can be made of steel plates, and the rear floor frame assembly can be formed by a die-casting process. The parts that need to be die-cast are reduced, and existing smaller-sized die-casting machines can be used to reduce production costs. In the final assembly workshop, there is no need to develop new production lines or modify production lines. The existing production lines can be used to complete the welding and assembly with the vehicle body side panels and the rear floor. In addition, new models and existing models can be produced on the same line, which can also reduce production input and production costs.

[0079] In addition, the rear floor frame assembly includes the rear floor middle body and the rear floor front cross beam 2, and the rear floor front cross beam 2 is connected between the door sill beams 8 on both sides. During the production process, it can adapt to the changes in the wheelbase and the R point of the second row of seats of various vehicle models, and has a high degree of versatility, which is also conducive to reducing the production cost of the vehicle. The vehicle body rear floor assembly of this embodiment has high structural strength of each component, and the coordination of each component is conducive to improving the overall structural strength of the vehicle body rear floor assembly. It is applied to vehicles and is conducive to improving the safety of the vehicle.

[0080] Embodiment 2

[0081] This embodiment relates to a vehicle, on which is provided a vehicle body rear floor assembly as described in the first embodiment.

[0082] The vehicle of this embodiment can reduce the production cost of the vehicle and has better practicality by applying the vehicle body rear floor assembly of the first embodiment.

[0083] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle body rear floor assembly, characterized in that: Including split rear floor frame assembly and edge sheet metal; The rear floor frame assembly comprises a rear floor middle body and a rear floor front cross beam (2) which are separately arranged, the rear floor middle body comprises rear floor longitudinal beams (1) which are arranged on the left and right sides, and a rear floor cross beam and a floor assembly which are connected between the rear floor longitudinal beams (1) on both sides; The front end of each rear floor longitudinal beam is connected to a threshold beam (8), and the rear floor front cross beam (2) is connected between the threshold beams (8) on both sides and connected to the front side of the floor assembly; The edge sheet metal comprises a front sheet metal (9) connected to the front side of the front cross beam (2) of the rear floor, and a side sheet metal (10) connected to the outside of each of the rear floor longitudinal beams (1); the front sheet metal (9) is connected between the door sill beams (8) on both sides and is used to connect to the front floor; the side sheet metal (10) and the rear floor longitudinal beam (1) on the same side are assembled to form a rear wheel cover (11); and the side sheet metal (10) is used to connect to the side of the vehicle body.

2. The vehicle body rear floor assembly according to claim 1, characterized in that: Each of the rear floor longitudinal beams (1) comprises a front section (101) and a rear section (102) of the rear floor longitudinal beam connected front to back, and each of the side sheet metals (10) comprises a front section (1001) of the side sheet metal arranged outside the front section (101) of the rear floor longitudinal beam, and a rear section (1002) of the side sheet metal arranged outside the rear section (102) of the rear floor longitudinal beam; The rear floor cross beam comprises a rear floor middle cross beam (3) and a rear floor rear cross beam (4); the floor assembly comprises a middle floor (5), a middle rear floor connecting plate (6) and a rear floor (7); the rear floor middle cross beam (3), the middle rear floor connecting plate (6) and the rear floor rear cross beam (4) are sequentially connected from front to rear and are located between the front sections (101) of the rear floor longitudinal beams on both sides; the front sections (101) of the rear floor longitudinal beams on both sides, the rear floor middle cross beam (3), the middle rear floor connecting plate (6) and the rear floor rear cross beam (4) are die-cast to form an integrated structure; A vacant portion (12) is formed between the front sections (101) of the rear floor longitudinal beams on both sides, the front cross beams (2) of the rear floor, and the middle cross beams (3) of the rear floor, and the middle floor (5) is sealed at the vacant portion (12); the rear floor (7) is connected between the rear sections (102) of the rear floor longitudinal beams on both sides.

3. The vehicle body rear floor assembly according to claim 2, characterized in that: The rear portion of each rear floor longitudinal beam front section (101) is provided with an insertion slot (1011) opening toward the rear, and the rear section (102) of the rear floor longitudinal beam on each side is inserted into the insertion slot (1011) on the corresponding side, and each insertion slot (1011) is provided with a limiting portion (1012) for limiting the insertion depth of the rear section (102) of the rear floor longitudinal beam; The rear end of each rear floor longitudinal beam rear section (102) is connected to a mounting plate (13), and the mounting plate (13) is provided with an anti-collision beam mounting portion (1301) for mounting a rear anti-collision beam assembly.

4. The vehicle body rear floor assembly according to claim 2, characterized in that: A longitudinal beam groove (1013) is provided on each of the front sections (101) of the rear floor longitudinal beams. The longitudinal beam groove (1013) extends along the front-rear direction of the vehicle, and the middle portion of the longitudinal beam groove (1013) is higher than the front portion and the rear portion of the longitudinal beam groove (1013); The longitudinal beam groove body (1013) is provided with longitudinal beam groove in-groove longitudinal reinforcing ribs (1014) and transverse beam groove in-groove reinforcing ribs (1015). The longitudinal beam groove in-groove longitudinal reinforcing ribs (1014) are arranged in accordance with the shape of the longitudinal beam groove body (1013). There are a plurality of transverse beam groove in-groove reinforcing ribs (1015). The plurality of transverse beam groove in-groove reinforcing ribs (1015) are arranged at intervals in the front-rear direction of the vehicle. Each transverse beam groove in-groove reinforcing rib (1015) is arranged to intersect with the longitudinal beam groove in-groove longitudinal reinforcing rib (1014).

5. The vehicle body rear floor assembly according to claim 2, characterized in that: A rear subframe mounting portion (1016) is provided at the front and rear of each of the rear floor longitudinal beam front sections (101), and an air spring mounting portion (1017) is provided at the middle of each of the rear floor longitudinal beam front sections (101). A plurality of longitudinal beam lower reinforcing ribs (1018) are provided between the air spring mounting portion (1017) and each of the rear subframe mounting portions (1016). The plurality of longitudinal beam lower reinforcing ribs (1018) are arranged at intervals in the left rear direction of the vehicle, and each of the longitudinal beam lower reinforcing ribs (1018) extends in the front-rear direction of the vehicle.

6. The vehicle body rear floor assembly according to claim 5, characterized in that: A middle floor rear side groove (103) is provided between the two rear sub-frame mounting parts (1016) at the front, a plurality of middle floor rear side reinforcing ribs (104) are provided in the middle floor rear side groove (103), and the plurality of middle floor rear side reinforcing ribs (104) are arranged in sequence in the left-right direction of the vehicle; and / or, A rear cross beam groove (401) is provided between the two rear sub-frame mounting parts (1016) at the rear part. The rear cross beam groove (401) is provided corresponding to the rear cross beam (4) of the rear floor. A rear cross beam groove transverse reinforcing rib (402) and a plurality of rear cross beam groove longitudinal reinforcing ribs (403) are provided in the rear cross beam groove (401); the rear cross beam groove transverse reinforcing rib (402) extends in the left-right direction of the vehicle, and the plurality of rear cross beam groove longitudinal reinforcing ribs (403) are divided into a plurality of groups arranged in the left-right direction of the vehicle, and each group of the rear cross beam groove longitudinal reinforcing ribs (403) includes two rear cross beam groove longitudinal reinforcing ribs (403) arranged crosswise.

7. The vehicle body rear floor assembly according to claim 2, characterized in that: A middle cross beam groove (301) is provided in the middle cross beam (3) of the rear floor, and a plurality of middle cross beam groove inner reinforcing ribs (302) are provided in the middle cross beam groove (301), and the plurality of middle cross beam groove inner reinforcing ribs (302) are arranged in sequence in the left-right direction of the vehicle.

8. The vehicle body rear floor assembly according to claim 1, characterized in that: The front section (101) of the rear floor longitudinal beam is provided with a threshold beam groove (106) arranged close to the threshold beam (8), and the threshold beam groove (106) extends in the front-rear direction of the vehicle. The sill beam groove body (106) is provided with a sill beam groove inner longitudinal reinforcing rib (107) and a plurality of sill beam groove inner transverse reinforcing ribs (108), wherein the sill beam groove inner longitudinal reinforcing rib (107) extends along the front-rear direction of the vehicle, and the plurality of sill beam groove inner transverse reinforcing ribs (108) are arranged at intervals in the front-rear direction of the vehicle.

9. The vehicle body rear floor assembly according to any one of claims 1 to 8, characterized in that: A front cross beam reinforcement plate (14) is provided on the front side of the rear floor front cross beam (2), and the rear floor front cross beam (2) and the front cross beam reinforcement plate (14) are buckled to form a rear cross beam cavity, and the rear cross beam cavity extends in the left-right direction of the vehicle.

10. A vehicle, characterized in that: The vehicle is provided with the vehicle body rear floor assembly according to any one of claims 1 to 9.

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