Rear floor reinforcing structure and vehicle
By setting longitudinal and transverse reinforcement plates in the rear floor to form a force transmission channel, the problem of the reduction of torsional stiffness of the spare tire compartment after deepening the spare tire compartment is solved, the operation stability and NVH performance of the whole vehicle are improved, and the whole vehicle is extended The durability of the car.
Patent Information
- Application Number
- CN202421047429.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-05-14
AI Technical Summary
After the existing rear floor structure deepens, the torsional stiffness of the spare tire cabin decreases, resulting in deformation and abnormal noise of the spare tire cabin, affecting the operation stability and NVH performance of the whole vehicle and reducing market competitiveness.
Longitudinal and transverse reinforcement plates are installed in the rear floor to form a force transmission channel, enhance the resistance to deformation of the spare tire compartment, and disperse the impact force through the reinforcement plate to avoid deformation and abnormal noise.
It improves the impact deformation resistance of the spare tire compartment, reduces the impact force, improves the operating stability and NVH performance of the whole vehicle, and extends the durability of the whole vehicle.
Smart Images
Figure CN222179656U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vehicles, and in particular relates to a rear floor reinforcement structure and a vehicle. Background Art
[0002] The rear floor of the vehicle body is usually located under the trunk, and the spare tire of some models is placed in the spare tire compartment sunken under the rear floor. As consumers' demand for the volume of the car trunk increases, the spare tire needs to be sunken to make more space for the trunk. For this purpose, the depth of the spare tire compartment on the rear floor needs to be deepened.
[0003] Since the current rear floor structure is only suitable for working conditions when the spare tire pit is shallow, when the spare tire well is deepened, the center of gravity of the spare tire well is lowered, and the torsional stiffness and modal of the spare tire well become weaker. During vehicle driving, the spare tire will impact the spare tire well with the bumps and vibrations of the vehicle body, causing deformation of the spare tire well, abnormal noises from impacts, and other problems, affecting the operational stability and NVH performance of the entire vehicle, and then causing the subsequent durability performance of the entire vehicle, thereby reducing market competitiveness. Utility Model Content
[0004] The embodiments of the utility model provide a rear floor reinforcement structure and a vehicle, aiming to improve the supporting strength of the rear floor, thereby improving the load-bearing capacity and mode of the spare tire well, and reducing the vibration deformation and abnormal noise of the spare tire well.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a rear floor reinforcement structure, including: a rear floor body, a rear floor middle cross beam located in front of the rear floor body, and a rear section of the rear floor longitudinal beam laterally arranged on both sides of the rear floor body, the rear floor body is provided with a sunken spare tire compartment, a transverse reinforcement plate is provided between the spare tire compartment and the rear section of the rear floor longitudinal beam, and a transverse force transmission channel is formed; a longitudinal reinforcement plate is provided between the spare tire compartment and the rear floor middle cross beam, and a longitudinal force transmission channel is formed.
[0006] In combination with the first aspect, in an achievable manner, the transverse reinforcement plate includes a transverse reinforcement plate body and a first transverse connecting portion and a second transverse connecting portion respectively arranged at both ends thereof, the first transverse connecting portion being transversely connected to the inner side surface of the rear section of the rear floor longitudinal beam, and the second transverse connecting portion being transversely connected to the outer side surface of the spare tire well.
[0007] In combination with the first aspect, in one achievable manner, the transverse reinforcement plate further includes a first lower connecting portion disposed at an outer end of the transverse reinforcement plate body, and the first lower connecting portion is connected to a lower side surface of a rear section of the rear floor longitudinal beam.
[0008] In combination with the first aspect, in one achievable manner, the first transverse connecting portion is connected to the first lower connecting portion.
[0009] In combination with the first aspect, in one achievable manner, the cross-section of the transverse reinforcing plate body along the longitudinal direction is a groove-shaped structure.
[0010] In combination with the first aspect, in an achievable manner, the longitudinal reinforcement plate includes a longitudinal reinforcement plate body and a first longitudinal connecting portion arranged at the rear end of the longitudinal reinforcement plate body, the front end of the longitudinal reinforcement plate body is connected to the rear side surface of the cross beam in the rear floor, and the first longitudinal connecting portion is connected to the outer side surface of the spare tire well.
[0011] In combination with the first aspect, in one achievable manner, the longitudinal reinforcing plate further includes second lower connecting portions disposed on both lateral sides of the longitudinal reinforcing plate body, and the second lower connecting portions are connected to the lower side surface of the rear floor body.
[0012] In combination with the first aspect, in one achievable manner, the cross-section of the longitudinal reinforcing plate body along the transverse direction is a groove-shaped structure.
[0013] In combination with the first aspect, in one achievable manner, two longitudinal reinforcing plates are provided between the spare tire well and the rear floor center cross beam, and the two longitudinal reinforcing plates respectively correspond to two sub-frame mounting positions on the rear floor center cross beam.
[0014] Compared with the prior art, the rear floor reinforcement structure provided by the utility model has the following beneficial effects: first, a longitudinal reinforcement plate is arranged between the spare tire well and the middle cross beam of the rear floor in the longitudinal direction of the vehicle body, which can resist the deformation of the spare tire well in the longitudinal direction; and a transverse reinforcement plate is arranged between the spare tire well and the rear sections of the longitudinal beams of the rear floor on both sides in the transverse direction of the vehicle body, which can resist the deformation of the spare tire well in the transverse direction. Therefore, the reinforcement plates arranged longitudinally and transversely strengthen and support the spare tire well from different directions, which can improve the deformation resistance of the spare tire well; second, the longitudinal reinforcement plate also forms a bridge connecting the spare tire well and the middle cross beam of the rear floor, connecting the force transmission channel between the spare tire well and the middle cross beam of the rear floor, and connecting the spare tire well when the whole vehicle is running. The impact force generated and received during the driving process is effectively transmitted to the middle crossbeam of the rear floor through the longitudinal reinforcement plate, so as to disperse the stress and avoid the deformation and abnormal noise of the spare tire well. Similarly, the transverse reinforcement plate also forms a bridge between the spare tire well and the rear section of the rear floor longitudinal beam, connecting the force transmission channel between the spare tire well and the rear section of the rear floor longitudinal beam, and effectively transmitting the impact force generated and received by the spare tire well during the driving process of the vehicle to the rear sections of the rear floor longitudinal beams on both sides through the transverse reinforcement plate to disperse the stress and avoid the deformation and abnormal noise of the spare tire well. Thirdly, especially when the depth of the spare tire well is sunk to increase the volume of the luggage compartment, the deformation and abnormal noise of the spare tire well can also be avoided.
[0015] In a second aspect, an embodiment of the utility model further provides a vehicle, comprising the rear floor reinforcement structure.
[0016] The vehicle provided by the embodiment of the utility model has longitudinal reinforcing plates and transverse reinforcing plates respectively arranged in the longitudinal and transverse directions of the spare tire well, so that the spare tire well is reinforced in all directions, thereby improving the ability of the spare tire well to resist impact deformation. At the same time, the longitudinal reinforcing plates and the transverse reinforcing plates constitute longitudinal and transverse force transmission channels, and the impact force exerted on the spare tire well is dispersed to the surroundings through the transverse reinforcing plates and the longitudinal reinforcing plates, thereby reducing the impact force exerted on the spare tire well, thereby improving the operating stability and NVH performance of the whole vehicle, thereby improving the durability of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A three-dimensional schematic diagram of the rear floor reinforcement structure provided by an embodiment of the utility model Figure 1 (Looking up);
[0018] Figure 2 A three-dimensional schematic diagram of the rear floor reinforcement structure provided by an embodiment of the utility model Figure 2 (Looking up);
[0019] Figure 3 A three-dimensional schematic diagram of the rear floor reinforcement structure provided by an embodiment of the utility model Figure 3 (looking down);
[0020] Figure 4 A schematic diagram of a top view of a rear floor reinforcement structure provided by an embodiment of the utility model;
[0021] Figure 5 For along Figure 4 The cross-sectional structure diagram along the AA line;
[0022] Figure 6 For along Figure 4 The cross-sectional structure diagram of the middle BB line;
[0023] Figure 7 Schematic diagram of the three-dimensional structure of the transverse reinforcement plate provided in the embodiment of the utility model Figure 1 (Looking up);
[0024] Figure 8 Schematic diagram of the three-dimensional structure of the transverse reinforcement plate provided in the embodiment of the utility model Figure 2 (looking down);
[0025] Fig. 9 Schematic diagram of the three-dimensional structure of the longitudinal reinforcement plate provided in the embodiment of the utility model Figure 1 (Looking up);
[0026] Fig.10Schematic diagram of the three-dimensional structure of the longitudinal reinforcement plate provided in the embodiment of the utility model Figure 2 (looking down);
[0027] Description of reference numerals:
[0028] 1. Middle cross beam of rear floor; 11. Rear subframe mounting position; 2. Longitudinal reinforcement plate; 21. Longitudinal reinforcement plate body; 22. Second lower connection part; 23. First longitudinal connection part; 3. Rear section of rear floor longitudinal beam; 4. Transverse reinforcement plate; 41. First transverse connection part; 42. Second transverse connection part; 43. First lower connection part; 44. Transverse reinforcement plate body; 5. Rear floor body; 51. Spare tire compartment; 6. Upper cross beam of rear floor; 7. Rear subframe reinforcement plate. DETAILED DESCRIPTION
[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0030] It should be noted that, in the description of the present invention, the lateral direction is consistent with the left-right direction of the vehicle body, and the longitudinal direction is consistent with the front-back direction of the vehicle body. Since the spare tire well is a sunken cavity, the inside of the spare tire well cavity is described as the inner side, and the outside of the spare tire well cavity is described as the outer side. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.
[0031] Please also read Figures 1 to 6 The rear floor reinforcement structure provided by the utility model is now described. The rear floor reinforcement structure comprises: a rear floor body 5, a rear floor middle cross beam 1 located in front of the rear floor body 5, and rear floor longitudinal beam rear sections 3 arranged on both sides of the rear floor body 5 in the transverse direction. The rear floor body 5 is provided with a sunken spare tire compartment 51, and a transverse reinforcement plate 4 is arranged between the spare tire compartment 51 and the rear floor longitudinal beam rear section 3 to form a transverse force transmission channel; a longitudinal reinforcement plate 2 is arranged between the spare tire compartment 51 and the rear floor middle cross beam 1 to form a longitudinal force transmission channel.
[0032] The rear floor reinforcement structure provided by the utility model has the following beneficial effects:
[0033] The first is the reinforcement effect. The purpose of the reinforcement effect is to enhance the deformation ability of the spare tire well 51, which is specifically as follows: a longitudinal reinforcement plate 2 is arranged between the spare tire well 51 and the middle cross beam 1 of the rear floor in the longitudinal direction of the vehicle body, which can resist the longitudinal deformation of the spare tire well 51, and a transverse reinforcement plate 4 is arranged between the spare tire well 51 and the rear section 3 of the rear floor longitudinal beam on both sides along the transverse direction of the vehicle body, which can resist the transverse deformation of the spare tire well 51. Therefore, the longitudinal and transverse reinforcement plates strengthen and support the spare tire well 51 from different directions, which can enhance the deformation resistance of the spare tire well 51.
[0034] The second is the role of force transmission, which is the role of dredging, such as Figure 4 The middle arrows C, D, E, and F are paths along which the force of the spare tire well 51 is dispersed and transmitted to the surroundings. Force transmission is to disperse the force received by the spare tire well 51 to other places to prevent the deformation of the spare tire well 51. The analysis is as follows: the longitudinal reinforcement plate 2 also forms a bridge connecting the spare tire well 51 and the middle cross beam 1 of the rear floor, connecting the force transmission channel between the spare tire well 51 and the middle cross beam 1 of the rear floor, and effectively transmitting the impact force generated and received by the spare tire well 51 during the running of the whole vehicle to the middle cross beam 1 of the rear floor through the longitudinal reinforcement plate 2 to disperse the stress, thereby avoiding the deformation and abnormal noise of the spare tire well 51; similarly, the transverse reinforcement plate 4 also forms a bridge connecting the spare tire well 51 and the rear section 3 of the rear floor longitudinal beam, connecting the force transmission channel between the spare tire well 51 and the rear section 3 of the rear floor longitudinal beam, and effectively transmitting the impact force generated and received by the spare tire well 51 during the running of the whole vehicle to the rear sections 3 of the rear floor longitudinal beam on both sides through the transverse reinforcement plate 4 to disperse the stress, and strengthen the spare tire well 51 through the longitudinal reinforcement plate 2 and the transverse reinforcement plate 4, thereby avoiding the deformation and abnormal noise of the spare tire well 51.
[0035] Thirdly, especially when the depth of the spare tire well is lowered in order to increase the volume of the trunk, the problems of deformation and abnormal noise of the spare tire well can also be avoided.
[0036] In this embodiment, since the spare tire well 51 is constructed by sinking the rear floor body 5, the longitudinal reinforcement plate 2 and the transverse reinforcement plate 4 are both connected to the outside of the spare tire well 51 and are located below the rear floor body 5, and are therefore located below the rear floor middle beam 1 and the rear section 3 of the rear floor longitudinal beam.
[0037] In some embodiments, see Figures 1 to 8As shown, the transverse reinforcing plate 4 includes a transverse reinforcing plate body 44 and a first transverse connecting portion 41 and a second transverse connecting portion 42 respectively arranged at both ends thereof, wherein the first transverse connecting portion 41 is transversely connected to the inner side surface of the rear floor longitudinal beam rear section 3, and the second transverse connecting portion 42 is transversely connected to the outer side surface of the spare tire well 51. The transverse reinforcing plate 4 is transversely connected between the spare tire well 51 and the rear floor longitudinal beam rear section 3, and the first transverse connecting portion 41 is fitted with the inner side surface of the rear floor longitudinal beam rear section 3, thereby increasing the contact area of the connection between the two components, thereby increasing the firmness of the connection between the two components; similarly, the second transverse connecting portion 42 is fitted with the outer side surface of the spare tire well 51, thereby increasing the contact area of the connection between the two components, thereby increasing the firmness of the connection between the two components, and further ensuring the reliability of the reinforcement performance and the reliability of the force transmission channel.
[0038] In some embodiments, see Figures 1 to 8 As shown, the transverse reinforcing plate 4 further includes a first lower connection portion 43 disposed at the outer end of the transverse reinforcing plate body 44, and the first lower connection portion 43 is connected to the lower side of the rear floor longitudinal beam rear section 3. The first lower connection portion 43 of the transverse reinforcing plate 4 is connected to the rear floor longitudinal beam rear section 3 from below, so that the transverse reinforcing plate 4 is connected to the rear floor longitudinal beam rear section 3 in both the transverse and downward directions, which can also improve the firmness of the connection between the transverse reinforcing plate 4 and the rear floor longitudinal beam rear section 3. At the same time, the first lower connection portion 43 is fitted and connected to the lower side of the rear floor longitudinal beam rear section 3, and the connection between the two has a large contact area, which can also improve the firmness of the connection between the two components.
[0039] Preferably, the first transverse connecting portion 41 and the second transverse connecting portion 42 extend in different directions one above and one below relative to the transverse reinforcing plate body 44, so that the transverse reinforcing plate 4 forms connecting portions in different directions, thereby improving the strength of the connection between the transverse reinforcing plate 4 and the spare tire well 51 and the rear section 3 of the rear floor longitudinal beam.
[0040] Optionally, the connection between the first transverse connecting portion 41, the second transverse connecting portion 42 and the first lower connecting portion 43 and the spare tire well 51 and the rear section 3 of the rear floor longitudinal beam can be one of welding, screw connection, clamping or riveting, or a combination of at least two of them.
[0041] In some embodiments, see Figures 1 to 8 As shown, the first transverse connecting portion 41 is connected to the first lower connecting portion 43, which ensures the integrity of the transverse reinforcing plate 4, and the connection between the two forms a mutual constraint, which is beneficial to improving the reinforcing effect and the force transmission effect.
[0042] In some embodiments, see Figures 7 to 8As shown, the longitudinal section of the transverse reinforcing plate body 44 is a groove-shaped structure. The groove-shaped structure of the transverse reinforcing plate body 44 can ensure the structural rigidity of the body itself without increasing the weight of the components, which is conducive to the lightweight of the vehicle body.
[0043] In some embodiments, see Figures 1 to 6 , Figures 9 and 10 As shown, the longitudinal reinforcing plate 2 includes a longitudinal reinforcing plate body 21 and a first longitudinal connecting portion 23 disposed at the rear end of the longitudinal reinforcing plate body 21. The front end of the longitudinal reinforcing plate body 21 is connected to the rear side of the cross beam 1 in the rear floor, and the first longitudinal connecting portion 23 is connected to the outer side of the spare tire well 51. The first longitudinal connecting portion 23 is fitted to the outer side of the spare tire well 51, thereby increasing the contact area of the connection between the two components, thereby increasing the firmness of the connection between the two components, and thereby ensuring the reliability of the reinforcement performance and the reliability of the force transmission channel.
[0044] Optionally, the front end of the longitudinal reinforcing plate body 21 is provided with a second longitudinal connecting portion (not shown in the figure) which fits the rear side of the rear floor center beam 1, so as to enhance the firmness of the connection between the longitudinal reinforcing plate 2 and the rear floor center beam 1 and the reliability of force transmission.
[0045] In some embodiments, see Figures 1 to 6 , Figures 9 and 10 As shown, the longitudinal reinforcing plate 2 also includes second lower connecting parts 22 disposed on both sides of the longitudinal reinforcing plate body 21 in the transverse direction, and the second lower connecting parts 22 are connected to the lower side of the rear floor body 5. The second lower connecting part 22 of the longitudinal reinforcing plate 2 is connected to the rear floor body 5 from below, so that the longitudinal reinforcing plate 2 is connected to the rear floor body 5 in both the longitudinal and downward directions, which can also improve the firmness of the connection between the longitudinal reinforcing plate 2 and the rear floor body 5. At the same time, the second lower connecting part 22 is fittedly connected to the lower side of the rear floor body 5, and the connection between the two has a large contact area, which can also improve the firmness of the connection between the two components.
[0046] Optionally, the connection between the first longitudinal connecting portion 23, the second lower connecting portion 22 and the spare tire well 51 and the cross beam 1 in the rear floor may be one of welding, screw connection, clamping or riveting, or a combination of at least two of them.
[0047] In order to improve the strength of the connection, reinforcing ribs may be provided on the first longitudinal connection portion 23, the second lower connection portion 22 and the longitudinal reinforcing plate body, and in particular, concave and convex reinforcing ribs may be provided at the bent portion of the longitudinal reinforcing plate. Similarly, reinforcing ribs may also be provided on the transverse reinforcing plate.
[0048] In some embodiments, see Figures 9 and 10As shown, the longitudinal reinforcing plate body 21 has a groove-shaped cross section along the transverse direction. Similarly, the groove-shaped structure of the longitudinal reinforcing plate body 21 can ensure the structural rigidity of the body itself without increasing the weight of the components, which is conducive to the lightweight of the vehicle body.
[0049] At the same time, since the longitudinal reinforcing plate 2 and the rear floor body 5 have a second lower connecting portion 22 that is fitted and connected, and the longitudinal reinforcing plate body 21 is a groove-shaped structure, a cavity is formed between the longitudinal reinforcing plate 2 and the rear floor body 5, which also has a better energy absorption and vibration reduction effect.
[0050] In some embodiments, see Figure 1 to Figure 2 , Figure 4 As shown, two longitudinal reinforcing plates 2 are arranged between the spare tire compartment 51 and the rear floor center cross beam 1 , and the two longitudinal reinforcing plates 2 correspond to the two sub-frame mounting positions on the rear floor center cross beam 1 , respectively.
[0051] The two longitudinal reinforcing plates 2 between the spare tire well 51 and the rear floor center cross beam 1 utilize the strength at the rear subframe mounting point to transfer stress to the rear subframe and the rear floor center cross beam 1, further enhancing the stress dispersion effect and reducing the stress on the spare tire well 51, thereby reducing the problems of stress deformation and abnormal noise in the spare tire well 51.
[0052] Since the two longitudinal reinforcing plates 2 correspond to the rear subframe mounting positions 11 on the rear floor middle cross beam 1, a longitudinal force transmission channel is formed, and at the intersection, a cavity is formed between the longitudinal reinforcing plates 2 and the rear floor body 5, and a cavity is formed between the rear floor middle cross beam 1 and the rear floor upper cross beam 6 above it, and a rear subframe reinforcing plate 7 is also arranged in the cavity, which is beneficial to the absorption and attenuation of stress.
[0053] The utility model connects the spare tire well 51, which originally had no direct connection, with the rear section 3 of the rear floor longitudinal beam and the rear floor middle cross beam 1, through the longitudinal reinforcement plate 2 and the transverse reinforcement plate 4, and fixes the spare tire well 51 longitudinally and transversely, and forms a new cavity with the rear floor middle cross beam 1 and the rear section 3 of the rear floor longitudinal beam. The new cavity absorbs the stress transmitted transversely and longitudinally, transmits the longitudinal stress to the rear floor middle cross beam 1 and the rear subframe, and transmits the transverse stress to the rear section 3 of the rear floor longitudinal beam. After the stress generated and received during the driving of the vehicle is dissipated through the above-mentioned means, the operating stability of the whole vehicle is improved, the abnormal sound rate is reduced, the NVH performance is improved, the durability of components is improved, and the competitiveness is simultaneously improved.
[0054] To explain, NVH performance refers to the noise, vibration and harshness of a car, which is an important indicator to measure the manufacturing quality of a car.
[0055] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0056] Based on the same inventive concept, an embodiment of the present application also provides a vehicle, including the rear floor reinforcement structure.
[0057] The vehicle provided by the embodiment of the utility model has a longitudinal reinforcing plate 2 and a transverse reinforcing plate 4 respectively arranged in the longitudinal and transverse directions of the spare tire well 51, so that the spare tire well 51 is reinforced in all directions, thereby improving the ability of the spare tire well 51 to resist impact deformation. At the same time, the longitudinal reinforcing plate 2 and the transverse reinforcing plate 4 constitute longitudinal and transverse force transmission channels, and the impact force exerted on the spare tire well 51 is dispersed to the surroundings through the transverse reinforcing plate 4 and the longitudinal reinforcing plate 2, thereby reducing the impact force exerted on the spare tire well 51, thereby improving the operating stability and NVH performance of the whole vehicle, thereby improving the durability of the whole vehicle.
[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements 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 reinforcement structure, comprising: A rear floor body (5), a rear floor middle cross beam (1) located in front of the rear floor body (5), and a rear floor longitudinal beam rear section (3) arranged on both sides of the rear floor body (5) in the transverse direction, characterized in that the rear floor body (5) is provided with a sunken spare tire compartment (51), a transverse reinforcement plate (4) is provided between the spare tire compartment (51) and the rear floor longitudinal beam rear section (3), and a transverse force transmission channel is formed; a longitudinal reinforcement plate (2) is provided between the spare tire compartment (51) and the rear floor middle cross beam (1), and a longitudinal force transmission channel is formed.
2. The rear floor reinforcement structure according to claim 1, characterized in that: The transverse reinforcement plate (4) comprises a transverse reinforcement plate body (44) and a first transverse connecting portion (41) and a second transverse connecting portion (42) respectively arranged at two ends thereof, wherein the first transverse connecting portion (41) is transversely connected to the inner side surface of the rear section (3) of the rear floor longitudinal beam, and the second transverse connecting portion (42) is transversely connected to the outer side surface of the spare tire compartment (51).
3. The rear floor reinforcement structure according to claim 2, characterized in that: The transverse reinforcing plate (4) further comprises a first lower connecting portion (43) arranged at the outer end of the transverse reinforcing plate body (44), wherein the first lower connecting portion (43) is connected to the lower side surface of the rear section (3) of the rear floor longitudinal beam.
4. The rear floor reinforcement structure according to claim 3, characterized in that: The first transverse connecting portion (41) is connected to the first lower connecting portion (43).
5. The rear floor reinforcement structure according to claim 2, characterized in that: The cross section of the transverse reinforcing plate body (44) along the longitudinal direction is a groove-shaped structure.
6. The rear floor reinforcement structure according to any one of claims 1 to 5, characterized in that: The longitudinal reinforcing plate (2) comprises a longitudinal reinforcing plate body (21) and a first longitudinal connecting portion (23) arranged at the rear end of the longitudinal reinforcing plate body (21), the front end of the longitudinal reinforcing plate body (21) is connected to the rear side surface of the cross beam (1) in the rear floor, and the first longitudinal connecting portion (23) is connected to the outer side surface of the spare tire compartment (51).
7. The rear floor reinforcement structure according to claim 6, characterized in that: The longitudinal reinforcing plate (2) further comprises second lower connecting portions (22) arranged on both lateral sides of the longitudinal reinforcing plate body (21), and the second lower connecting portions (22) are connected to the lower side surface of the rear floor body (5).
8. The rear floor reinforcement structure according to claim 6, characterized in that: The longitudinal reinforcing plate body (21) has a groove-shaped structure in cross section along the transverse direction.
9. The rear floor reinforcement structure according to claim 6, characterized in that: Two longitudinal reinforcing plates (2) are arranged between the spare wheel compartment (51) and the rear floor middle cross beam (1), and the two longitudinal reinforcing plates (2) respectively correspond to two sub-frame mounting positions on the rear floor middle cross beam (1).
10. A vehicle, characterized in that: It comprises the rear floor reinforcement structure as claimed in any one of claims 1 to 9.