Rear floor framework and vehicle

Abstract

The utility model provides a rear floor framework and a vehicle, the rear floor framework comprises rear floor longitudinal beams arranged on the left side and the right side of the vehicle respectively and a rear floor middle cross beam connected between the rear floor longitudinal beams on the two sides, and the lower side of each rear floor longitudinal beam is provided with a damping spring installation part. The damping spring installation parts on the two sides are arranged close to the two ends of the rear floor middle cross beam respectively, reinforcing beams are arranged between the rear floor middle cross beam and the rear floor longitudinal beams on the two sides respectively, and reinforcing beams are arranged on the front side and the rear side of the rear floor middle cross beam. According to the rear floor framework, the rigidity and the strength of the installation position of the damping spring can be improved, the dynamic and static rigidity of the installation position of the damping spring can be well improved, impact and vibration borne by the damping spring can be reduced, and the riding comfort and the NVH performance of vehicle passengers can be improved. Meanwhile, the risk of durable cracking of the mounting position of the damping spring can be reduced, and the safety of the vehicle can be improved.

Description

Technical Field

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

[0002] The rear floor frame is an important component of the vehicle body structure. It is located in the floor part behind the passenger compartment, and together with the front floor system and the front cabin system, it forms the lower body. It supports the upper body, opening and closing parts and other assemblies and related accessories, the weight of the occupants, etc., while bearing the loads, vibrations, impacts and torques generated during the movement of the vehicle.

[0003] The vehicle's rear shock absorber spring is a key component in the vehicle's rear suspension system. In some vehicle models, the top of the vehicle's rear shock absorber spring is connected to the rear floor frame. The main functions of the vehicle's rear shock absorber spring are to absorb impact energy, alleviate vibration, support the weight of the vehicle body, etc. It also works with the shock absorber. The function of the shock absorber is to control the reciprocating motion speed of the shock absorber spring to prevent the vehicle from generating unnecessary vibrations after passing through bumpy roads.

[0004] During the use of the vehicle, the rear shock absorber spring is frequently subjected to impact and vibration, so there are extremely high requirements for the stiffness and strength of the rear shock absorber spring. If the dynamic and static stiffness and strength of the installation structure are insufficient, the riding comfort of the car passengers will be deteriorated, and the risk of durable cracking will be increased, posing a safety hazard. Utility Model Content

[0005] In view of this, the utility model aims to provide a rear floor frame to improve the rigidity and strength of the rear shock-absorbing spring installation position.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A rear floor frame, comprising rear floor longitudinal beams disposed on the left and right sides of a vehicle, and a rear floor middle cross beam connected between the rear floor longitudinal beams on both sides;

[0008] A shock absorbing spring mounting portion is provided on the lower side of each rear floor longitudinal beam, and the shock absorbing spring mounting portions on both sides are arranged close to the two ends of the rear floor middle cross beam;

[0009] Reinforcement beams are respectively connected between the rear floor middle cross beam and the rear floor longitudinal beams on both sides, and the front side and the rear side of the rear floor middle cross beam are both provided with the reinforcement beams.

[0010] Furthermore, each of the reinforcing beams is made of tubular material, and both ends of each of the reinforcing beams are detachably connected to the rear floor longitudinal beam and the rear floor middle cross beam, respectively.

[0011] Furthermore, both ends of each reinforcement beam are provided with a flat portion, and each reinforcement beam is connected to the rear floor longitudinal beam or the rear floor middle cross beam via a connecting piece passing through the flat portion.

[0012] Further, at least one of the reinforcing beams is provided with a fuel tank strap mounting portion; and / or,

[0013] At least one of the reinforcing beams is provided with an oil pipe mounting portion.

[0014] Furthermore, each of the rear floor longitudinal beams is provided with a longitudinal beam flange folded toward the inner side of the vehicle, and the rear floor middle cross beam includes a middle cross beam body extending along the left-right direction of the vehicle, and a middle cross beam connecting plate connected to the two ends of the middle cross beam body, and each of the middle cross beam connecting plates is provided with a first flange connected to the bottom of the rear floor longitudinal beam at the corresponding end, a second flange connected to the inner side of the rear floor longitudinal beam at the corresponding end, and a third flange connected to the longitudinal beam flange of the rear floor longitudinal beam at the corresponding end.

[0015] Furthermore, a rear floor rear cross beam is connected between the rear floor longitudinal beams on both sides. The rear floor rear cross beam is located behind the rear floor middle cross beam and includes a rear cross beam body extending along the left-right direction of the vehicle, and rear cross beam connecting plates connected to the two ends of the rear cross beam body. The rear floor rear cross beam is connected to the rear floor longitudinal beams at the corresponding ends through the rear cross beam connecting plates at both ends.

[0016] Furthermore, each of the rear cross beam connecting plates is provided with a fourth flange connected to the bottom of the rear floor longitudinal beam at the corresponding end, a fifth flange connected to the inner side of the rear floor longitudinal beam at the corresponding end, and a sixth flange connected to the longitudinal beam flange of the rear floor longitudinal beam at the corresponding end.

[0017] Furthermore, the size of the rear cross beam connecting plate in the front-rear direction of the vehicle gradually increases from the rear cross beam body to the rear floor longitudinal beam; and / or,

[0018] From the center cross beam body to the rear floor longitudinal beam, the size of the center cross beam connecting plate in the front-rear direction of the vehicle gradually increases.

[0019] Furthermore, a bottom support seat is provided at the bottom of the rear floor longitudinal beam, and a side support seat is provided at the outer side of the rear floor longitudinal beam;

[0020] The shock-absorbing spring mounting portion includes a shock-absorbing spring mounting seat, and the shock-absorbing spring mounting seat is respectively connected to the bottom supporting seat and the side supporting seat and is arranged on the rear floor longitudinal beam.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] The rear floor frame described in the utility model can make the shock-absorbing spring mounting parts on both sides arranged close to the two ends of the rear floor middle cross beam, and can take advantage of the greater stiffness and strength of the connection part between the rear floor longitudinal beam and the rear floor middle cross beam to improve the stiffness and strength of the shock-absorbing spring mounting position. The arranged reinforcing beam can further improve the stiffness and strength of the connection part between the rear floor longitudinal beam and the rear floor middle cross beam, and can better improve the dynamic and static stiffness of the shock-absorbing spring mounting position, reduce the impact and vibration borne by the shock-absorbing spring, which is beneficial to improving the riding comfort and NVH (Noise, Vibration, Harshness) performance of the vehicle occupants, and at the same time can reduce the risk of durable cracking of the shock-absorbing spring mounting position, and can improve the safety of the vehicle.

[0023] In addition, the reinforcing beam is made of tubular material, which has good structural strength, and is conducive to improving the rigidity and strength of the connection between the rear floor longitudinal beam and the rear floor middle beam. The reinforcing beam is detachably connected to the rear floor longitudinal beam and the rear floor middle beam, which is convenient for assembly and disassembly. Flat parts are set at both ends of the reinforcing beam, which has a simple structure. During the processing, the ends of the reinforcing beam can be flattened to process the holes for the connecting parts to pass through, which is convenient for processing and easy to assemble. The fuel tank strap installation part is set on the reinforcing beam to facilitate the fixing of the fuel tank, and the fuel pipe installation part is set to facilitate the layout of the fuel pipe, which can achieve a highly integrated and multifunctional design, which is conducive to reducing the number of parts and reducing costs, and is convenient for overall layout.

[0024] In addition, the longitudinal beam flange is provided, and the first flange, the second flange and the third flange are provided on the middle cross beam connecting plate, which can better improve the structural strength of the connection between the middle cross beam connecting plate and the rear floor longitudinal beam, and the rear cross beam of the rear floor is provided, which is conducive to better improving the structural strength and rigidity of the rear floor frame, thereby better ensuring the structural strength and rigidity of the shock-absorbing spring installation point. The fourth flange, the fifth flange and the sixth flange are provided on the rear cross beam connecting plate, which can better improve the structural strength of the connection between the rear cross beam connecting plate and the rear floor longitudinal beam.

[0025] Furthermore, when the rear cross beam connecting plate and the middle cross beam connecting plate are restricted to approach the rear longitudinal beam of the automobile along the vehicle width direction, the size in the vehicle length direction gradually increases, which is conducive to improving the structural strength and rigidity of the connection between the rear cross beam and the middle cross beam of the rear floor and the rear floor longitudinal beam. The bottom support seat and the side support seat are arranged to improve the structural strength and rigidity of the connection between the shock-absorbing spring mounting seat and the rear floor longitudinal beam, which is conducive to improving the durability and preventing the impact of durable cracking on driving safety.

[0026] Another object of the present invention is to provide a vehicle, on which the above-mentioned rear floor frame is provided.

[0027] The vehicle described in the utility model has the same beneficial effects as the aforementioned rear floor frame relative to the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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:

[0029] Figure 1 This is a schematic structural diagram of the rear floor frame according to the first embodiment of the utility model;

[0030] Figure 2 for Figure 1 Schematic diagram of the structure from another perspective;

[0031] Figure 3 for Figure 1 A magnified view of part A;

[0032] Figure 4 This is an assembly diagram of the bottom support seat, the side support seat and the shock-absorbing spring mounting seat described in the first embodiment of the utility model;

[0033] Figure 5 for Figure 4 Schematic diagram of the structure from another perspective;

[0034] Figure 6 for Figure 1 Enlarged view of part B.

[0035] Description of reference numerals:

[0036] 1. Rear floor longitudinal beam; 101. Front section of longitudinal beam; 102. Rear section of longitudinal beam; 103. Longitudinal beam flange;

[0037] 2. middle cross beam of rear floor; 201. main body of middle cross beam; 202. connecting plate of middle cross beam; 2021. first flange; 2022. second flange; 2023. third flange;

[0038] 3. Shock-absorbing spring installation part;

[0039] 4. Strengthening beam; 401. Flat portion;

[0040] 5. Rear floor rear cross beam; 501. Rear cross beam body; 502. Rear cross beam connecting plate; 5021. Fourth flange; 5022. Fifth flange; 5023. Sixth flange;

[0041] 6. Connecting piece; 7. Fuel tank strap mounting portion; 8. Fuel pipe mounting portion; 9. Bottom support seat; 10. Side support seat. DETAILED DESCRIPTION

[0042] 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.

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back" 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, rather than indicating or implying 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.

[0044] 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.

[0045] like Figure 1 and Figure 2 As shown, 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 figure: the arrow in front points to the head of the vehicle, the arrow behind points to the tail of the vehicle, the arrow up points to the top of the vehicle, and the arrow down 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 figure, the left arrow points to the left side of the vehicle, and the right arrow points to the right side of the vehicle.

[0046] 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.

[0047] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0048] Embodiment 1

[0049] The present embodiment relates to a rear floor frame, which can effectively improve the structural strength and rigidity of the shock-absorbing spring installation position, so as to enhance the ride comfort and safety of the vehicle.

[0050] Based on the above design concept, an exemplary structure of the rear floor frame of this embodiment is as follows: Figure 1 and Figure 2As shown, in terms of overall structure, the rear floor frame of this embodiment mainly includes rear floor longitudinal beams 1 disposed on the left and right sides of the vehicle, and rear floor middle cross beams 2 connected between the rear floor longitudinal beams 1 on both sides. Among them, each rear floor longitudinal beam 1 extends along the front-to-back direction of the vehicle, and the rear floor middle cross beam 2 extends along the left-to-right direction of the vehicle.

[0051] In order to better improve the structural strength of the shock-absorbing spring installation position, in the present embodiment, a shock-absorbing spring installation portion 3 is provided on the lower side of each rear floor longitudinal beam 1, and the shock-absorbing spring installation portions 3 on both sides are arranged close to the two ends of the rear floor middle cross beam 2. In this way, the shock-absorbing spring installation portions 3 are arranged at the intersection of the rear floor longitudinal beam 1 and the rear floor middle cross beam 2. The rear floor middle cross beam 2 can provide support for the shock-absorbing spring installation portions 3 along the width direction of the vehicle, thereby better improving the structural strength and rigidity of the shock-absorbing spring installation position.

[0052] In order to further improve the structural strength of the shock absorber spring installation position, refer to Figure 1 and Figure 2 As shown, in this embodiment, reinforcing beams 4 are respectively connected between the rear floor middle cross beam 2 and the rear floor longitudinal beams 1 on both sides, and the front and rear sides of the rear floor middle cross beam 2 are both connected with reinforcing beams 4. Specifically, each reinforcing beam 4 is connected to the rear floor longitudinal beam 1 at one end and connected to the rear floor middle cross beam 2 at the other end. This structure allows the reinforcing beam 4, the rear floor longitudinal beam 1 and the rear floor middle cross beam 2 to form a roughly triangular structure, which can better improve the structural strength and rigidity of the connection between the rear floor longitudinal beam 1 and the rear floor middle cross beam 2.

[0053] As a preferred embodiment, each reinforcement beam 4 is made of tubular material, and the two ends of each reinforcement beam 4 are detachably connected to the rear floor longitudinal beam 1 and the rear floor middle cross beam 2. As in this embodiment, each reinforcement beam 4 is made of tubular material, and preferably a round tube is bent into an arc, and the tube wall thickness is preferably 1.5mm-2mm, such as 1.6mm, which is light in weight and has good structural strength, which is conducive to improving the rigidity and strength of the connection part of the rear floor longitudinal beam 1 and the rear floor middle cross beam 2. The reinforcement beam 4 is detachably connected to the rear floor longitudinal beam 1 and the rear floor middle cross beam 2, and is easy to assemble and disassemble.

[0054] It should be noted that, in this embodiment, the reinforcing beam 4 may be made of not only a round tube but also a square tube, or may be made of H-shaped steel, angle steel or other shaped steel, or may be a non-hollow structure.

[0055] For the convenience of processing, as a preferred embodiment, both ends of each reinforcing beam 4 are provided with a flat portion 401, and each reinforcing beam 4 is connected to the rear floor longitudinal beam 1 or the rear floor middle cross beam 2 via a connecting piece 6 passing through the flat portion 401. Figure 1As shown in the head 2, flat portions 401 are provided at both ends of the reinforcing beam 4, which can be flattened by a press or other tool, and then through holes are processed on the flat portions 401. Corresponding through holes are provided on the rear floor longitudinal beam 1 and the rear floor middle cross beam 2, and the connecting member 6 can specifically adopt a bolt pair inserted into the corresponding through holes and through holes, which has a simple structure, is convenient to process, and is easy to assemble.

[0056] In order to facilitate the overall arrangement, as a preferred embodiment, Figure 3 As shown, at least one of the reinforcing beams 4 is provided with a tank strap mounting portion 7. In this embodiment, the tank strap mounting portion 7 specifically includes a protrusion disposed on each reinforcing beam 4 on the front side of the rear floor center cross beam 2, and a tank strap mounting hole disposed on the protrusion. The protrusion protrudes radially outward along the reinforcing beam 4 and protrudes forward on the vehicle. The tank strap can be screwed into the tank strap mounting hole by bolts to facilitate fixing of the tank strap, thereby improving the convenience of fuel tank installation.

[0057] At the same time, still refer to Figure 3 As shown, as a preferred embodiment, at least one of the reinforcing beams 4 is provided with an oil pipe mounting portion 8. As in this embodiment, the oil pipe mounting portion 8 specifically includes mounting brackets arranged on each reinforcing beam 4 on the front side of the rear floor middle cross beam 2, each mounting bracket is provided with an oil pipe fixing hole, and the oil pipe can be clamped to the oil pipe fixing hole by a buckle, or the oil pipe can be fixed to the oil pipe fixing hole by a bolt passing through the oil pipe fixing hole and a nut cooperating therewith.

[0058] It should be noted that, in this embodiment, two oil pipe mounting portions 8 are provided on each reinforcing beam 4 on the front side of the rear floor middle cross beam 2, and the two oil pipe mounting portions 8 are arranged close to both ends of the reinforcing beam 4, respectively. The axial direction of the oil pipe fixing hole close to the rear floor longitudinal beam 1 extends along the left-right direction of the vehicle, and the axial direction of the oil pipe fixing hole close to the rear floor middle cross beam 2 extends along the up-down direction of the vehicle, which is more conducive to the arrangement of the oil pipe. It should be understood that the number of the oil pipe mounting portions 8 can also be set to other values ​​as needed, such as one, three, etc.

[0059] In the above structure, the tank strap mounting portion 7 is provided on the reinforcing beam 4 to facilitate fixing the tank, and the oil pipe mounting portion 8 is provided to facilitate the layout of the oil pipe, which can achieve a highly integrated and multifunctional design, and is conducive to reducing the number of parts and reducing costs. In addition, in the preferred embodiment, the tank strap mounting portion 7 and the oil pipe mounting portion 8 are only provided on the two reinforcing beams 4 on the front side of the rear floor middle cross beam 2.

[0060] Still refer to Figure 1 and Figure 2 As shown, as a preferred embodiment, each rear floor longitudinal beam 1 includes a longitudinal beam front section 101 and a longitudinal beam rear section 102, and the longitudinal beam front section 101 and the longitudinal beam rear section 102 are welded together front to back, which is convenient for processing.

[0061] Specifically, the cross-sections of the front sections 101 and rear sections 102 of each longitudinal beam are roughly in a "ji" shape. The shapes of the front sections 101 and rear sections 102 of each longitudinal beam are such that both the front section 101 and the rear section 102 of the longitudinal beam have a longitudinal beam flange 103 that is folded inward toward the vehicle interior. In this way, it has relatively high structural strength, is convenient for forming a cavity extending in the vehicle's front-rear direction with the rear floor enclosure (not shown in the figure), and the connection strength between the rear floor longitudinal beam 1 and the rear floor is also relatively high.

[0062] Continue to refer to Figures 1 to 3 As shown, the rear floor middle crossbeam 2 includes a middle crossbeam main body 201 extending in the vehicle's left-right direction, and middle crossbeam connection plates 202 connected to both ends of the middle crossbeam main body 201. The rear floor middle crossbeam 2 is respectively connected to the corresponding end of the rear floor longitudinal beam 1 through the middle crossbeam connection plates 202 at both ends, specifically connected to the front section 101 of the longitudinal beam, and can provide support for the shock absorber spring mounting portion 3 in the vehicle's left-right direction.

[0063] Specifically, each middle crossbeam connection plate 202 is provided with a first flange 2021, a second flange 2022, and a third flange 2023. The first flange 2021 is connected to the bottom of the corresponding end of the rear floor longitudinal beam 1, and the connection method is preferably welding. The second flange 2022 and the third flange 2023 are provided on both the front and rear sides of each middle crossbeam connection plate 202, and the second flange 2022 is connected to the inner side of the corresponding end of the rear floor longitudinal beam 1, and the connection method is preferably welding. The third flange 2023 is connected to the longitudinal beam flange 103 of the corresponding end of the rear floor longitudinal beam 1, and the connection method is preferably welding.

[0064] In the above structure of this embodiment, by providing the longitudinal beam flange 103 and providing the first flange 2021, the second flange 2022, and the third flange 2023 on the middle crossbeam connection plate 202, it can better increase the contact area between the middle crossbeam connection plate 202 and the rear floor longitudinal beam 1, facilitate the arrangement of more welding points, and thus can better improve the connection structural strength between the middle crossbeam connection plate 202 and the rear floor longitudinal beam 1.

[0065] In order to further improve the structural strength and stiffness of the shock absorber spring mounting position, as a preferred implementation manner, a rear floor rear crossbeam 5 is connected between the rear floor longitudinal beams 1 on both sides. The rear floor rear crossbeam 5 is located behind the rear floor middle crossbeam 2, and is specifically connected between the rear sections 102 of the longitudinal beams on both sides, and includes a rear crossbeam main body 501 extending in the vehicle's left-right direction, and rear crossbeam connection plates 502 connected to both ends of the rear crossbeam main body 501. The rear floor rear crossbeam 5 is respectively connected to the corresponding end of the rear floor longitudinal beam 1 through the rear crossbeam connection plates 502 at both ends.

[0066] In this embodiment, the rear cross member 5 of the rear floor is provided, which is beneficial to better improving the structural strength and stiffness of the rear floor skeleton, so as to better ensure the structural strength and stiffness of the shock absorber spring mounting points. In addition, the rear cross member 5 of the rear floor can also provide auxiliary support for the shock absorber spring mounting portion 3 in the left-right direction of the vehicle, and at the same time improve the stiffness of the shock absorber spring mounting portion 3 in the front-rear direction and up-down direction of the vehicle.

[0067] Still referring to Figures 1 to 3 and in combination with Figure 6 As shown, as a preferred embodiment, the fourth flange 5021, the fifth flange 5022 and the sixth flange 5023 are provided on each rear cross member connecting plate 502. Among them, the fourth flange 5021 is connected to the bottom of the corresponding rear floor longitudinal beam 1, and both the fifth flange 5022 and the sixth flange 5023 are two, and the fifth flange 5022 and the sixth flange 5023 are respectively provided on the front and rear sides of the rear cross member connecting plate 502. The fifth flange 5022 is connected to the inner side of the corresponding rear floor longitudinal beam 1, and the sixth flange 5023 is connected to the longitudinal beam flange 103 of the corresponding rear floor longitudinal beam 1, which can increase the contact area between the rear cross member connecting plate 502 and the rear floor longitudinal beam 1, arrange more welding points, and thus can better improve the connection structural strength between the rear cross member connecting plate 502 and the rear floor longitudinal beam 1.

[0068] As a preferred embodiment, from the rear cross member main body 501 to the rear floor longitudinal beam 1, the size of the rear cross member connecting plate 502 gradually increases in the front-rear direction of the vehicle. At the same time, as a preferred embodiment, from the middle cross member main body 201 to the rear floor longitudinal beam 1, the size of the middle cross member connecting plate 202 gradually increases in the front-rear direction of the vehicle. With such a setting, when the rear cross member connecting plate 502 and the middle cross member connecting plate 202 approach the rear longitudinal beam of the vehicle in the vehicle width direction, the size in the vehicle length direction gradually increases, which is beneficial to better improving the structural strength and stiffness of the connection parts between the rear floor rear cross member 5 and the rear floor middle cross member 2 and the rear floor longitudinal beam 1.

[0069] It should also be noted here that in this embodiment, the cross sections of the rear floor middle cross member 2 and the rear floor rear cross member 5 are both in a "J" shape, which can better improve the connection strength with the rear floor, and cavities extending in the left-right direction of the vehicle are formed between the rear floor middle cross member 2 and the rear floor and between the rear floor rear cross member 5 and the rear floor, which is beneficial to ensuring the structural strength of the rear floor assembly.

[0070] Such as Figure 4 and Figure 5As shown, as a preferred embodiment, a bottom support seat 9 is provided at the bottom of the rear floor longitudinal beam 1, a side support seat 10 is provided on the outer side of the rear floor longitudinal beam 1, and the shock-absorbing spring mounting portion 3 includes a shock-absorbing spring mounting seat, which is connected to the bottom support seat 9 and the side support seat 10 respectively and is provided on the rear floor longitudinal beam 1. The provided bottom support seat 9 and the side support seat 10 are conducive to improving the structural strength and rigidity of the connection portion between the shock-absorbing spring mounting seat and the rear floor longitudinal beam 1, and are conducive to improving the durability, and can prevent durable cracking from affecting driving safety.

[0071] In terms of specific structure, the side support seat 10 includes a side support body and a flange arranged at the lower end of the side body and bent outward, and the bottom support seat 9 is welded to the lower surface of the rear floor longitudinal beam 1, and a cavity is formed between the bottom support seat 9 and the rear floor longitudinal beam 1. A part of the bottom support seat 9 protrudes downward, and the lower surface of the protruding part is coplanar with the lower surface of the flange on the side support seat 10. The shock-absorbing spring mounting seat is welded to the flange of the side support seat 10 and the protruding part of the bottom support seat 9.

[0072] The specific structure of the shock-absorbing spring mounting seat can refer to the existing structure. In this embodiment, the shock-absorbing spring mounting seat is a disc-shaped structure, the middle part of which protrudes downward and a through hole is provided on the protruding part. The top of the shock-absorbing spring not shown in the figure is connected to the shock-absorbing spring mounting seat.

[0073] The rear floor frame of this embodiment, by arranging the shock-absorbing spring mounting parts on both sides close to the two ends of the rear floor middle cross beam 2, can take advantage of the greater stiffness and strength of the connection part between the rear floor longitudinal beam 1 and the rear floor middle cross beam 2 to improve the stiffness and strength of the shock-absorbing spring mounting position. The provided reinforcing beam 4 can further improve the stiffness and strength of the connection part between the rear floor longitudinal beam 1 and the rear floor middle cross beam 2, can better improve the dynamic and static stiffness of the shock-absorbing spring mounting position, reduce the impact and vibration borne by the shock-absorbing spring, and help improve the riding comfort and NVH performance of the vehicle occupants. At the same time, it can reduce the risk of durable cracking at the shock-absorbing spring mounting position, and can improve the safety of the vehicle.

[0074] Embodiment 2

[0075] This embodiment relates to a vehicle, on which a rear floor frame as in the first embodiment is provided.

[0076] The vehicle of this embodiment can improve the riding comfort and NVH performance of the vehicle by applying the rear floor frame of the first embodiment, and also help to improve the safety of the vehicle.

[0077] 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 rear floor frame, characterized in that: It comprises rear floor longitudinal beams (1) disposed on the left and right sides of the vehicle, and a rear floor middle cross beam (2) connected between the rear floor longitudinal beams (1) on the two sides; A shock absorbing spring mounting portion (3) is provided on the lower side of each rear floor longitudinal beam (1), and the shock absorbing spring mounting portions (3) on both sides are respectively arranged close to the two ends of the rear floor middle cross beam (2); Reinforcement beams (4) are respectively connected between the rear floor middle cross beam (2) and the rear floor longitudinal beams (1) on both sides, and the front and rear sides of the rear floor middle cross beam (2) are both provided with the reinforcement beams (4).

2. The rear floor frame according to claim 1, characterized in that: Each of the reinforcing beams (4) is made of tubular material, and both ends of each of the reinforcing beams (4) are detachably connected to the rear floor longitudinal beam (1) and the rear floor middle cross beam (2).

3. The rear floor frame according to claim 1, characterized in that: Both ends of each reinforcing beam (4) are provided with a flat portion (401), and each reinforcing beam (4) is connected to the rear floor longitudinal beam (1) or the rear floor middle cross beam (2) via a connecting piece (6) passing through the flat portion (401).

4. The rear floor frame according to claim 1, characterized in that: At least one of the reinforcing beams (4) is provided with a fuel tank strap mounting portion (7); and / or, At least one of the reinforcing beams (4) is provided with an oil pipe mounting portion (8).

5. The rear floor frame according to claim 1, characterized in that: Each of the rear floor longitudinal beams (1) is provided with a longitudinal beam flange (103) folded toward the inner side of the vehicle, and the rear floor middle cross beam (2) includes a middle cross beam body (201) extending in the left-right direction of the vehicle, and a middle cross beam connecting plate (202) connected to both ends of the middle cross beam body (201), and each of the middle cross beam connecting plates (202) is provided with a first flange (2021) connected to the bottom of the rear floor longitudinal beam (1) at the corresponding end, a second flange (2022) connected to the inner side of the rear floor longitudinal beam (1) at the corresponding end, and a third flange (2023) connected to the longitudinal beam flange (103) of the rear floor longitudinal beam (1) at the corresponding end.

6. The rear floor frame according to claim 5, characterized in that: A rear floor rear cross beam (5) is connected between the rear floor longitudinal beams (1) on both sides. The rear floor rear cross beam (5) is located behind the rear floor middle cross beam (2) and comprises a rear cross beam body (501) extending in the left-right direction of the vehicle and rear cross beam connecting plates (502) connected to both ends of the rear cross beam body (501). The rear floor rear cross beam (5) is connected to the rear floor longitudinal beams (1) at the corresponding ends through the rear cross beam connecting plates (502) at both ends.

7. The rear floor frame according to claim 6, characterized in that: Each of the rear cross beam connecting plates (502) is provided with a fourth flange (5021) connected to the bottom of the rear floor longitudinal beam (1) at the corresponding end, a fifth flange (5022) connected to the inner side of the rear floor longitudinal beam (1) at the corresponding end, and a sixth flange (5023) connected to the longitudinal beam flange (103) of the rear floor longitudinal beam (1) at the corresponding end.

8. The rear floor frame according to claim 6, characterized in that: From the rear cross beam body (501) to the rear floor longitudinal beam (1), the size of the rear cross beam connecting plate (502) in the front-rear direction of the vehicle gradually increases; and / or, From the middle cross beam body (201) to the rear floor longitudinal beam (1), the size of the middle cross beam connecting plate (202) in the front-rear direction of the vehicle gradually increases.

9. The rear floor frame according to any one of claims 1 to 8, characterized in that: A bottom support seat (9) is provided at the bottom of the rear floor longitudinal beam (1), and a side support seat (10) is provided at the outer side of the rear floor longitudinal beam (1); The shock absorbing spring mounting portion (3) comprises a shock absorbing spring mounting seat, and the shock absorbing spring mounting seat is respectively connected to the bottom supporting seat (9) and the side supporting seat (10) and is arranged on the rear floor longitudinal beam (1).

10. A vehicle, characterized in that: The vehicle is provided with a rear floor frame as claimed in any one of claims 1 to 9.

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