Rear floor longitudinal beam structure and vehicle

Abstract

The application relates to the technical field of vehicle body structures, and provides a rear floor longitudinal beam structure and a vehicle. The rear floor longitudinal beam structure comprises a longitudinal beam body, a rear subframe mounting piece arranged at the bottom of the longitudinal beam body, and a rear floor cross beam connecting part. The rear floor cross beam connecting part comprises an upper connecting plate and a lower connecting plate which are stacked together and respectively connected with the longitudinal beam body and the rear subframe mounting piece. The rear floor longitudinal beam structure has the advantages that by arranging the rear subframe mounting piece at the bottom of the longitudinal beam body, the size and the cross-sectional area of the rear subframe mounting point on the longitudinal beam body in the height direction of the whole vehicle are increased, and the structural strength and the rigidity of the longitudinal beam body at the rear subframe mounting point are improved. Meanwhile, the rear floor cross beam connecting part further improves the lateral rigidity of the rear subframe mounting point position, so that the rigidity of the whole rear part of the vehicle body is improved, and the structural stability of the whole vehicle body is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle body structure technology, and in particular to a rear floor longitudinal beam structure and vehicle. Background Technology

[0002] The rear floor longitudinal beam, located at the rear of the vehicle body, connects the rear floor crossbeam and the rear subframe, and is a crucial component of the automotive body structure. In related technologies, to improve the structural rigidity of the rear floor longitudinal beam, reinforcing plates are typically installed within cavities of the beam body to strengthen it. However, the size of the reinforcing plates is usually limited by the dimensions of the longitudinal beam itself, resulting in limited reinforcement and insufficient support. This leads to insufficient rigidity at the rear subframe mounting points on the longitudinal beam, as well as inadequate installation stability of the rear subframe and rear floor crossbeam on the longitudinal beam, ultimately hindering the improvement of the overall structural stability of the vehicle body. Utility Model Content

[0003] In view of this, this application aims to propose a rear floor longitudinal beam structure, which is beneficial to improving the overall structural stability of the vehicle body.

[0004] To achieve the above objectives, the technical solution of this application is implemented as follows: A rear floor longitudinal beam structure includes a longitudinal beam body extending along the longitudinal direction of the vehicle, a rear subframe mounting member disposed at the bottom of the longitudinal beam body, and a rear floor crossbeam connecting portion disposed on the side of the longitudinal beam body near the vehicle interior. The rear subframe mounting member protrudes downward from the longitudinal beam body, and the rear floor crossbeam connecting portion includes an upper connecting plate and a lower connecting plate stacked together in the vertical direction of the vehicle. The upper connecting plate is connected to the longitudinal beam body, and the lower connecting plate is connected to the rear subframe mounting member.

[0005] Furthermore, the lower connecting plate has a receiving groove with a top opening; the bottom of the upper connecting plate is inserted into the receiving groove, and the upper connecting plate is connected to the lower connecting plate.

[0006] Furthermore, the lower connecting plate includes a base plate and side plates disposed on two opposite sides of the base plate; the base plate has an extension portion extending to the bottom of the rear subframe mounting member, the extension portion being connected to the rear subframe mounting member, and the side plates being connected to both the rear subframe mounting member and the upper connecting plate.

[0007] Furthermore, viewed from the vertical direction of the vehicle, the width of the upper connecting plate gradually increases in the longitudinal direction of the vehicle along the direction close to the longitudinal beam body; and / or, viewed from the vertical direction of the vehicle, the width of the lower connecting plate gradually increases in the longitudinal direction of the vehicle along the direction close to the longitudinal beam body.

[0008] Furthermore, viewed from the front-rear direction of the vehicle, the rear floor crossbeam connection is triangular, and along the direction away from the longitudinal beam body, the top of the upper connecting plate gradually slopes downward, while the bottom of the lower connecting plate gradually slopes upward.

[0009] Furthermore, viewed from the left-right direction of the vehicle, the lower connecting plate overlaps with at least a portion of the rear subframe mounting components.

[0010] Furthermore, the rear subframe mounting component has an upwardly protruding portion on the side closest to the vehicle interior; the protruding portion is sandwiched between the upper connecting plate and the longitudinal beam body, and the protruding portion is connected to both the upper connecting plate and the longitudinal beam body.

[0011] Furthermore, the rear subframe mounting component is a box-shaped structure with an open top, and forms a cavity with the longitudinal beam body; the cavity is provided with a mounting sleeve for mounting the rear subframe, and the two ends of the mounting sleeve are respectively connected to the longitudinal beam body and the rear subframe mounting component.

[0012] Furthermore, a cavity is formed within the longitudinal beam body, and the cavity extends along the length direction of the longitudinal beam body; a reinforcing plate is provided within the cavity, and when viewed from the left-right direction of the vehicle, the reinforcing plate overlaps with at least a portion of the rear floor crossbeam connection portion.

[0013] Compared with related technologies, this application has the following advantages: (1) The rear floor longitudinal beam structure described in this application increases the dimensions of the longitudinal beam body in the overall vehicle height direction by setting a rear subframe mounting component at the bottom of the longitudinal beam body, thereby increasing the cross-sectional area of ​​the rear subframe mounting point on the longitudinal beam body and improving the structural strength and rigidity of the longitudinal beam body at the rear subframe mounting point, thus providing a stable mounting foundation for the rear subframe. At the same time, the rear floor crossbeam connection includes an upper connecting plate and a lower connecting plate, which can form a multi-node connection structure between the longitudinal beam body and the rear floor crossbeam. While increasing the connection stability of the rear floor crossbeam, it further improves the lateral rigidity at the rear subframe mounting point, thereby improving the overall rigidity of the rear of the vehicle body, which in turn helps to improve the overall structural stability of the vehicle body.

[0014] (2) By inserting the upper connecting plate into the receiving groove of the lower connecting plate, the contact area between the upper and lower connecting plates is increased, the connection strength between the upper and lower connecting plates is increased, and the overall shear and torsional resistance of the rear floor crossbeam connection is enhanced, further improving the load-bearing capacity of the rear floor crossbeam connection and ensuring the load-bearing capacity of the rear subframe mounting point. At the same time, the setting of the receiving groove can provide a positioning base for the installation of the upper connecting plate, so as to avoid the upper and lower connecting plates from shifting during assembly.

[0015] (3) By setting the bottom plate and side plates, the lower connecting plate itself forms a stable frame structure, which can ensure the structural strength of the lower connecting plate itself. By setting the extension part, the number of connection points between the lower connecting plate and the rear subframe mounting part can be increased, which optimizes the force transmission path between the subframe mounting part and the lower connecting plate while ensuring the connection effect. At the same time, the side plates are connected to the rear subframe mounting part and the upper connecting plate, which improves the overall integrity of the connection between the upper connecting plate, the lower connecting plate and the rear subframe mounting part, and further improves the structural strength.

[0016] (4) By gradually increasing the width of the upper or lower connecting plate, the connection area between the upper and lower connecting plates and the longitudinal beam body and the rear subframe mounting parts can be increased, thereby improving the connection strength between the upper and lower connecting plates and the longitudinal beam body. At the same time, a smooth transition between the longitudinal beam body and the rear floor crossbeam can be achieved, avoiding local stress concentration. Furthermore, when the upper and lower connecting plates are both gradually widened, the stiffness at the rear subframe mounting point on the longitudinal beam body can be further improved, thereby enhancing the structural strength and stiffness of the vehicle body.

[0017] (5) By setting the rear floor beam connection in a triangular shape, the stability of the triangular structure can be utilized to enhance the overall torsional and shear resistance of the rear floor beam connection, thereby further improving the strength and stiffness of the rear floor longitudinal beam structure. At the same time, the inclined setting of the upper and lower connecting plates can further optimize the force transmission path between the longitudinal beam body and the rear floor beam, reduce local stress concentration, and thus further improve the load-bearing capacity of the rear floor longitudinal beam structure.

[0018] (6) By setting the lower connecting plate to overlap with at least part of the rear subframe mounting parts, the connection area between the lower connecting plate and the rear subframe mounting parts can be increased, and the connection strength between the lower connecting plate and the rear subframe mounting parts can be improved. At the same time, it is beneficial for the rear subframe mounting parts and the longitudinal beam body to jointly bear the force from the rear floor crossbeam along the left and right direction of the whole vehicle, and to disperse the force of the rear floor crossbeam to the longitudinal beam body and the rear subframe mounting parts, thereby further improving the structural strength and rigidity of the rear of the vehicle body.

[0019] (7) By setting a protruding part on the rear subframe mounting part, the connection area between the longitudinal beam body and the rear subframe mounting part can be increased, thereby improving the connection strength between the longitudinal beam body and the rear subframe mounting part. At the same time, the upper connecting plate is connected to the protruding part, so that the upper connecting plate, the rear subframe mounting part and the longitudinal beam body directly form a continuous force transmission channel, which is conducive to transmitting the force on the upper connecting plate to the longitudinal beam body and the rear subframe mounting part, further improving the load-bearing capacity of the rear floor longitudinal beam structure.

[0020] (8) By setting a box-shaped rear subframe mounting component, the rear subframe mounting component can form a cavity around the longitudinal beam body to further enhance the structural reinforcement effect on the longitudinal beam body and improve the structural strength and rigidity of the rear subframe mounting component itself. At the same time, the installation sleeve set in the cavity can provide a rigid installation base for the rear subframe, so as to transfer the load of the rear subframe to the longitudinal beam body and the rear subframe mounting component through the installation sleeve, thereby ensuring the reliability of the connection between the rear subframe and the rear floor longitudinal beam structure.

[0021] (9) By setting up the cavity, the bending and torsional resistance of the longitudinal beam body can be enhanced, thereby improving the overall structural strength and rigidity of the longitudinal beam body. In addition, the material usage of the longitudinal beam body can be reduced, which is conducive to the lightweight design of the vehicle body. At the same time, the reinforcement plate is set up and overlaps with the connection part of the rear floor crossbeam in the left and right direction of the whole vehicle. This can strengthen the corresponding area where the longitudinal beam body and the rear floor crossbeam are connected, thereby further improving the load-bearing capacity of the connection part between the longitudinal beam body and the rear floor crossbeam and ensuring the overall rigidity of the rear floor longitudinal beam structure.

[0022] Another object of this application is to provide a vehicle having a rear floor longitudinal beam structure as described above.

[0023] The vehicle and / or rear floor longitudinal beam structure described in this application have the same technical effects as the prior art, and will not be described in detail here. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure when the rear floor longitudinal beam structure and the rear floor transverse beam are connected according to the embodiments of this application; Figure 2 This is a schematic diagram of the overall structure of the rear floor longitudinal beam structure described in the embodiments of this application; Figure 3 This is a structural schematic diagram of the rear floor longitudinal beam structure described in an embodiment of this application from another perspective; Figure 4 This is a top view of the rear floor longitudinal beam structure described in the embodiments of this application; Figure 5 This is a bottom view of the rear floor longitudinal beam structure described in the embodiments of this application; Figure 6 This is a front view of the rear floor longitudinal beam structure described in the embodiments of this application; Figure 7 for Figure 4 A sectional view at the location shown in AA; Figure 8for Figure 4 A cross-sectional view at the location shown in BB; Figure 9 This is a schematic diagram showing the connection between the longitudinal beam body and the rear subframe mounting component as described in the embodiments of this application; Figure 10 This is a schematic diagram showing the connection of the longitudinal beam body, the rear subframe mounting component, and the upper connecting plate as described in the embodiments of this application. Figure 11 This is a schematic diagram showing the connection between the upper connecting plate, the lower connecting plate and the rear subframe mounting component as described in the embodiments of this application; Figure 12 This is a schematic diagram of the structure of the rear subframe mounting component and mounting sleeve described in the embodiments of this application; Figure 13 This is a schematic diagram of the structure of the lower connecting plate described in an embodiment of this application; Figure 14 This is a schematic diagram of the upper connecting plate structure described in an embodiment of this application; Explanation of reference numerals in the attached figures: 1. Longitudinal beam body; 101. Cavity; 102. Reinforcing plate; 2. Rear subframe mounting components; 201. Bottom wall; 202. First side wall; 2021. First connecting part; 203. Second side wall; 2031. Protruding part; 2032. Second connecting part; 2033. Welding lug; 3. Upper connecting plate; 301. Bottom plate; 302. Side plate; 303. Groove; 4. Lower connecting plate; 401. Base plate; 4011. Extension part; 402. Side plate; 403. Receiving groove; 5. Install the sleeve; 501. Install the plate; 6. Rear floor beam. Detailed Implementation

[0025] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0027] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," and "connecting plate" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0029] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0031] An embodiment of the first aspect of this application provides a rear floor longitudinal beam structure.

[0032] In related technologies, to improve the structural rigidity of the rear floor longitudinal beam, reinforcing plates are typically installed within the cavities of the beam body to strengthen it. However, the size of the reinforcing plates is usually limited by the size of the longitudinal beam, resulting in a limited reinforcing effect. Consequently, the longitudinal beam cannot receive sufficient support, leading to insufficient rigidity at the rear subframe mounting points on the longitudinal beam, as well as insufficient installation stability of the rear subframe and rear floor crossbeams on the longitudinal beam, which is detrimental to improving the overall structural stability of the vehicle body.

[0033] In view of this, in order to overcome the shortcomings of related technologies, the rear floor longitudinal beam structure of this embodiment combines... Figure 1 , Figure 2 As shown, the overall design includes the longitudinal beam body 1, the rear subframe mounting component 2, and the rear floor crossbeam connection part.

[0034] The longitudinal beam body 1 extends along the front-rear direction of the vehicle. The rear subframe mounting component 2 is located at the bottom of the longitudinal beam body 1, and the rear floor crossbeam connecting part is located on the side of the longitudinal beam body 1 closer to the vehicle interior. The rear subframe mounting component 2 protrudes downwards from the longitudinal beam body 1. The rear floor crossbeam connecting part includes an upper connecting plate 3 and a lower connecting plate 4 stacked together in the vertical direction of the vehicle. The upper connecting plate 3 is connected to the longitudinal beam body 1, and the lower connecting plate 4 is connected to the rear subframe mounting component 2.

[0035] Therefore, by setting the rear subframe mounting component 2 at the bottom of the longitudinal beam body 1, the dimension of the longitudinal beam body 1 in the overall vehicle height direction is increased, and the cross-sectional area of ​​the rear subframe mounting point on the longitudinal beam body 1 is increased. This improves the lateral strength and rigidity of the longitudinal beam body 1 at the rear subframe mounting point, thereby providing a stable mounting foundation for the rear subframe.

[0036] Meanwhile, the rear floor crossbeam connection includes an upper connecting plate 3 and a lower connecting plate 4, which can form a multi-node connection structure between the longitudinal beam body 1 and the rear floor crossbeam 6, increasing the connection stability of the rear floor crossbeam 6. Furthermore, the rear floor crossbeam connection can reinforce the side of the longitudinal beam body 1, further improving the lateral stiffness of the rear subframe mounting point on the longitudinal beam body 1. This prevents the longitudinal beam body 1 from bending at the rear subframe mounting point in the left-right direction of the vehicle, thereby improving the overall rigidity of the rear of the vehicle body and thus enhancing the overall structural stability of the vehicle body.

[0037] Based on the above general introduction, specifically, in this embodiment, the rear subframe mounting component 2 is located at the bottom of the longitudinal beam body 1. It can not only improve the lateral stiffness of the rear subframe mounting point on the longitudinal beam body 1, but also provide support for the longitudinal beam body 1 in the vertical direction of the whole vehicle, thereby improving the structural stiffness of the longitudinal beam body 1 in the vertical direction of the whole vehicle, and thus improving the overall load-bearing capacity of the rear floor longitudinal beam structure.

[0038] Combination Figure 7 , Figure 11 and Figure 13 As shown, in some exemplary embodiments, the lower connecting plate 4 has a receiving groove 403 with a top opening. The bottom of the upper connecting plate 3 is inserted into the receiving groove 403, and the upper connecting plate 3 is connected to the lower connecting plate 4.

[0039] By inserting the upper connecting plate 3 into the receiving groove 403 of the lower connecting plate 4, the contact area between the upper connecting plate 3 and the lower connecting plate 4 is increased, the connection strength between the upper connecting plate 3 and the lower connecting plate 4 is increased, and the overall shear and torsional resistance of the rear floor crossbeam connection is enhanced, further improving the load-bearing capacity of the rear floor crossbeam connection and ensuring the load-bearing capacity of the rear subframe mounting point. Simultaneously, the receiving groove 403 provides a positioning base for the installation of the upper connecting plate 3, preventing misalignment between the upper connecting plate 3 and the lower connecting plate 4 during assembly.

[0040] Continue to combine Figure 3 and Figure 13 As shown, in some exemplary embodiments, the lower connecting plate 4 includes a base plate 401 and side plates 402 disposed on two opposite sides of the base plate 401. The base plate 401 has an extension 4011 extending to the bottom of the rear subframe mount 2, the extension 4011 being connected to the rear subframe mount 2, and the side plates 402 being connected to both the rear subframe mount 2 and the upper connecting plate 3.

[0041] By setting the base plate 401 and side plate 402, the lower connecting plate 4 itself forms a stable frame structure, ensuring the structural strength of the lower connecting plate 4. The extension portion 4011 increases the number of connection points between the lower connecting plate 4 and the rear subframe mounting component 2, optimizing the force transmission path between the subframe mounting component and the lower connecting plate 4 while ensuring effective connection. Simultaneously, the side plate 402 connects to the rear subframe mounting component 2 and the upper connecting plate 3, improving the overall integrity of the connection between the upper connecting plate 3, the lower connecting plate 4, and the rear subframe mounting component 2, further enhancing structural strength.

[0042] In specific implementation, combined with Figure 2 and Figure 13 As shown, the side plate 402 of the lower connecting plate 4 has an outwardly extending flange at one end that connects to the rear subframe mounting member 2. The side plate 402 of the lower connecting plate 4 abuts against the rear subframe mounting member 2 through this flange to ensure that there is sufficient connection area between the lower connecting plate 4 and the rear subframe mounting member 2.

[0043] Based on this, the flange of the side plate 402 and the extension 4011 on the bottom plate 401 are welded to the side and bottom of the rear subframe mounting part 2, respectively, to ensure the connection effect between the lower connecting plate 4 and the rear subframe mounting part 2, and to ensure that the lower connecting plate 4 and the rear floor crossbeam connection part as a whole provide structural reinforcement to the rear subframe mounting point, so as to ensure the lateral stiffness of the rear subframe mounting point.

[0044] Combination Figure 4 Figure 5As shown, in some exemplary embodiments, when viewed in the vertical direction of the vehicle, the width of the upper connecting plate 3 gradually increases in the longitudinal direction of the vehicle, along the direction close to the longitudinal beam body 1. Alternatively, when viewed in the vertical direction of the vehicle, the width of the lower connecting plate 4 gradually increases in the longitudinal direction of the vehicle, along the direction close to the longitudinal beam body 1.

[0045] By gradually increasing the width of the upper connecting plate 3 or the lower connecting plate 4, the connection area between the upper connecting plate 3, the lower connecting plate 4 and the longitudinal beam body 1 and the rear subframe mounting component 2 can be increased, thereby improving the connection strength between the upper connecting plate 3, the lower connecting plate 4 and the longitudinal beam body 1. At the same time, a smooth transition between the longitudinal beam body 1 and the rear floor crossbeam 6 can be achieved, avoiding local stress concentration.

[0046] Combination Figure 5 and Figure 6 As shown, in some exemplary embodiments, both the upper connecting plate 3 and the lower connecting plate 4 gradually increase in width in the front-rear direction of the vehicle to further enhance the rigidity at the mounting point of the rear subframe on the longitudinal beam body 1, thereby improving the structural strength and rigidity of the vehicle body.

[0047] In addition, when the force on the rear floor crossbeam 6 is transmitted to the rear floor crossbeam connection, the force can be effectively transmitted and dispersed along the front and rear of the vehicle to the longitudinal beam body 1 by means of the gradually increasing width of the upper connecting plate 3 and the lower connecting plate 4. This optimizes the force transmission path between the rear floor crossbeam 6 and the longitudinal beam body 1 to a certain extent.

[0048] Combination Figure 7 As shown, in some exemplary embodiments, when viewed in the front-rear direction of the vehicle, the rear floor crossbeam connection is triangular, and along the direction away from the longitudinal beam body 1, the top of the upper connecting plate 3 gradually slopes downward and the bottom of the lower connecting plate 4 gradually slopes upward.

[0049] By setting a triangular rear floor beam connection, the stability of the triangular structure can be utilized to enhance the overall torsional and shear resistance of the rear floor beam connection. Furthermore, the inclined arrangement of the upper connecting plate 3 and the lower connecting plate 4 can form a cavity structure, thereby further increasing the cross-sectional area of ​​the rear floor beam connection in the height direction, and further improving the strength and rigidity of the rear floor longitudinal beam structure.

[0050] At the same time, it can further optimize the force transmission path between the longitudinal beam body 1 and the rear floor crossbeam 6, so that the force on the rear floor crossbeam 6 can be transmitted to the longitudinal beam body 1 and the rear subframe mounting component 2 through the upper connecting plate 3 and the lower connecting plate 4 along the vertical direction of the whole vehicle, and can reduce local stress concentration, thereby further improving the load-bearing capacity of the rear floor longitudinal beam structure.

[0051] Combination Figure 6 As shown, in some exemplary embodiments, when viewed in the left-right direction of the vehicle, the lower connecting plate 4 overlaps with at least a portion of the rear subframe mounting member 2.

[0052] By setting the lower connecting plate 4 to overlap with at least part of the rear subframe mounting part 2, the connection area between the lower connecting plate 4 and the rear subframe mounting part 2 can be increased, the connection strength between the lower connecting plate 4 and the rear subframe mounting part 2 can be improved, and the rigidity of the longitudinal beam body 1 at the rear subframe mounting point can be enhanced.

[0053] At the same time, it is beneficial for the rear subframe mounting component 2 and the longitudinal beam body 1 to jointly bear the force from the rear floor crossbeam 6 along the left and right direction of the whole vehicle, and to disperse the force of the rear floor crossbeam 6 to the longitudinal beam body 1 and the rear subframe mounting component 2, thereby further improving the structural strength and rigidity of the rear floor longitudinal beam structure and the overall structure of the rear of the vehicle.

[0054] Combination Figure 3 , Figure 6 and Figure 11 As shown, in some exemplary embodiments, the rear subframe mount 2 has an upwardly protruding portion 2031 on the side closest to the vehicle interior. The protruding portion 2031 is sandwiched between the upper connecting plate 3 and the longitudinal beam body 1, and is connected to both the upper connecting plate 3 and the longitudinal beam body 1.

[0055] By providing a protruding portion 2031 on the rear subframe mounting component 2, the connection area between the longitudinal beam body 1 and the rear subframe mounting component 2 can be increased, thereby improving the connection strength between the longitudinal beam body 1 and the rear subframe mounting component 2. At the same time, the upper connecting plate 3 is connected to the protruding portion 2031, so that the upper connecting plate 3, the rear subframe mounting component 2 and the longitudinal beam body 1 directly form a continuous force transmission channel, which is conducive to transmitting the force on the upper connecting plate 3 to the longitudinal beam body 1 and the rear subframe mounting component 2, further improving the load-bearing capacity of the rear floor longitudinal beam structure.

[0056] In specific implementation, combined with Figure 11 and Figure 14 As shown, the upper connecting plate 3 in this embodiment includes a bottom plate 301 and side plates 302 disposed on both sides of the bottom plate 301 in the front-rear direction of the vehicle. The bottom plate 301 and the side plates 302 form a groove 303. The groove 303 improves the bending and torsional resistance of the upper connecting plate 3, thereby further improving the overall structural strength and rigidity of the rear floor crossbeam connection, ensuring the reinforcement effect of the rear floor crossbeam connection on the rear subframe mounting point.

[0057] Meanwhile, the groove 303 is designed to match the shape of the rear floor crossbeam 6, allowing the rear floor crossbeam 6 to be positioned within the groove 303 and thus overlap the end of the upper connecting plate 3 furthest from the longitudinal beam body 1. This increases the connection area between the upper connecting plate 3 and the rear floor crossbeam connection portion and the rear floor crossbeam 6, improving the installation stability of the rear floor crossbeam 6 on the rear floor crossbeam connection portion. This, in turn, ensures the connection effect between the rear floor crossbeam 6 and the longitudinal beam structure of the rear floor plate 401, ultimately enhancing the overall stability of the vehicle body structure.

[0058] Furthermore, in this embodiment, the bottom plate 301 of the upper connecting plate 3 extends in a flat shape along the left-right direction of the entire vehicle, and the length of the side plate 302 in the vertical direction of the entire vehicle gradually increases from the inner side of the vehicle towards the longitudinal beam body 1, so that the top of the side plate 302 constitutes a structure in which the top of the upper connecting plate 3 gradually slopes downward. Similarly, in this embodiment, the bottom plate 401 of the lower connecting plate 4 is inclined to ensure that the rear floor crossbeam connection part has an overall triangular structure, thereby ensuring the improvement of the strength and rigidity of the rear floor longitudinal beam structure.

[0059] In addition, the top of the side plate 302 and the side of the side plate 302 facing the protruding portion are both formed with flanges. The flange at the top can further improve the deformation resistance of the side plate 302 to ensure the overall strength and rigidity of the upper connecting plate 3. The flange facing the protruding portion 2031 can connect with the protruding portion 2031, increasing the connection area between the protruding portion 2031 and the upper connecting plate 3. At the same time, the bottom plate 301 of the upper connecting plate 3 also has a flange for connecting the protruding portion 2031 at one end, which works together with the flange of the side plate 302 to ensure the connection effect between the protruding portion 2031 and the upper connecting plate 3.

[0060] Combination Figure 7 , Figure 11 and Figure 12 As shown, in some exemplary embodiments, the rear subframe mounting member 2 is a box-shaped structure with an open top, forming a cavity with the longitudinal beam body 1. A mounting sleeve 5 for mounting the rear subframe is provided within the cavity, with both ends of the mounting sleeve 5 connected to the longitudinal beam body 1 and the rear subframe mounting member 2, respectively.

[0061] By setting a box-shaped rear subframe mounting component 2, the rear subframe mounting component 2 can form a cavity around the longitudinal beam body 1, thereby further improving the structural reinforcement effect on the longitudinal beam body 1 and improving the structural strength and rigidity of the rear subframe mounting component 2 itself, providing a stable installation foundation for the rear subframe.

[0062] Meanwhile, the installation sleeve 5 installed in the cavity provides a rigid mounting base for the rear subframe, so that the load of the rear subframe can be transferred to the longitudinal beam body 1 and the rear subframe mounting component 2 through the installation sleeve 5. This allows the rear subframe mounting component 2 and the installation sleeve 5 to jointly connect the rear subframe to the longitudinal beam body 1, thereby ensuring the reliability of the connection between the rear subframe and the entire rear floor longitudinal beam structure.

[0063] In specific implementation, combined with Figure 12 As shown, the rear subframe mounting component 2 in this embodiment is formed by bending and welding a single sheet metal. Specifically, the rear subframe mounting component 2 includes a bottom wall 201, two first side walls 202 disposed on two opposite ends of the bottom wall 201 along the front-rear direction of the vehicle, and two second side walls 203 disposed on two opposite ends of the bottom wall 201 along the left-right direction of the vehicle.

[0064] Among them, the two second side walls 203 are provided with welding ears 2033 at both ends in the front-rear direction of the whole vehicle. The welding ears 2033 overlap the adjacent first side wall 202 and are welded to the first side wall 202, so that the rear subframe mounting part 2 forms a box-shaped structure.

[0065] Furthermore, a first connecting portion 2021 extending along the longitudinal direction of the vehicle is formed at the top of the first sidewall 202. The first connecting portion 2021 abuts against the bottom of the longitudinal beam body 1 and is welded to the longitudinal beam body 1. The provision of the first connecting portion 2021 ensures that there is sufficient connection area between the rear subframe mounting component 2 and the longitudinal beam body 1.

[0066] Meanwhile, the protruding portion 2031 is formed on the second side wall 203 located on the longitudinal beam body 1 facing the inside of the vehicle. Corresponding to the protruding portion 2031, a second connecting portion 2032 is formed on the top of the other second side wall 203 to ensure that the rear subframe mounting component 2 is stably connected to the longitudinal beam body 1 in the left and right directions of the whole vehicle, and to ensure the reinforcement effect on the longitudinal beam body 1, and to ensure that the lateral stiffness at the rear subframe mounting point meets the design requirements.

[0067] In addition, combined Figure 7 and Figure 12 As shown, to ensure the connection stability between the rear subframe and the rear subframe mounting component 2, a mounting plate 501 is provided on the bottom wall 201 of the rear subframe mounting component 2 in this embodiment. The mounting plate 501 is located in the cavity and between the mounting sleeve 5 and the bottom wall 201. By setting the mounting plate 501, the area of ​​the bottom wall 201 that connects to the rear subframe can be structurally reinforced in a targeted manner, increasing the thickness of the area of ​​the bottom wall 201 corresponding to the rear subframe mounting point, thereby improving the structural strength and rigidity of the rear subframe mounting point and preventing deformation or damage to the mounting holes on the bottom wall 201 used to connect to the rear subframe, thus ensuring the connection stability between the rear subframe and the rear subframe mounting component 2.

[0068] Combination Figure 2 and Figure 7 As shown, in some exemplary embodiments, a cavity 101 is formed within the longitudinal beam body 1, and the cavity 101 extends along the length direction of the longitudinal beam body 1. A reinforcing plate 102 is provided within the cavity 101, and when viewed in the left-right direction of the vehicle, the reinforcing plate 102 overlaps with at least a portion of the rear floor crossbeam connection portion.

[0069] By incorporating cavity 101, the bending and torsional resistance of the longitudinal beam body 1 can be enhanced, thereby improving the overall structural strength and rigidity of the longitudinal beam body 1. Furthermore, it reduces the material usage of the longitudinal beam body 1, facilitating lightweight vehicle body design. Simultaneously, the reinforcement plate 102 is provided, overlapping with the rear floor crossbeam connection in the left-right direction of the vehicle. This structurally reinforces the corresponding area where the longitudinal beam body 1 connects to the rear floor crossbeam, further improving the load-bearing capacity of the connection and ensuring the overall rigidity of the rear floor longitudinal beam structure.

[0070] In specific implementation, the reinforcing plate 102 of this embodiment has a U-shaped structure, which matches the cavity 101 of the longitudinal beam body 1. In this way, while strengthening the bottom of the longitudinal beam body 1, it can also strengthen the side plate 402 of the longitudinal beam body 1, so as to further improve the lateral stiffness of the rear subframe mounting point on the longitudinal beam body 1.

[0071] It is worth noting that, regarding the rear floor longitudinal beam structure of this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 14 As shown, it may include, for example, a longitudinal beam body 1 extending in the front-rear direction of the vehicle, a rear subframe mounting member 2 located at the bottom of the longitudinal beam body 1, and a rear floor crossbeam connecting part located on the side of the longitudinal beam body 1 near the vehicle interior.

[0072] Among them, the rear subframe mounting part 2 protrudes downwards from the longitudinal beam body 1, and the rear floor crossbeam connection part includes an upper connecting plate 3 and a lower connecting plate 4 stacked together in the vertical direction of the whole vehicle. The upper connecting plate 3 is connected to the longitudinal beam body 1, and the lower connecting plate 4 is connected to the rear subframe mounting part 2.

[0073] Furthermore, the lower connecting plate 4 includes a base plate 401 and side plates 402 disposed on two opposite sides of the base plate 401. The base plate 401 has an extension portion 4011 extending to the bottom of the rear subframe mounting member 2, and the extension portion 4011 is connected to the rear subframe mounting member 2. The side plates 402 are connected to both the rear subframe mounting member 2 and the upper connecting plate 3. The base plate 401 and the side plates 402 form a receiving groove 403 at the top of the lower connecting plate 4, and the bottom of the upper connecting plate 3 is inserted into the receiving groove 403, and the upper connecting plate 3 is connected to the lower connecting plate 4.

[0074] Furthermore, viewed vertically, the widths of the upper connecting plate 3 and the lower connecting plate 4 gradually increase in the longitudinal direction, closer to the longitudinal beam body 1. Also, in the longitudinal direction, the rear floor crossbeam connection is triangular, and along the direction away from the longitudinal beam body 1, the top of the upper connecting plate 3 gradually slopes downwards, while the bottom of the lower connecting plate 4 gradually slopes upwards. In the left-right direction, the lower connecting plate 4 overlaps with at least a portion of the rear subframe mounting member 2.

[0075] Finally, the rear subframe mounting component 2 has an upwardly protruding portion 2031 on the side closest to the vehicle interior, sandwiched between the upper connecting plate 3 and the longitudinal beam body 1. The rear subframe mounting component 2 is box-shaped with an open top, forming a cavity with the longitudinal beam body 1. A mounting sleeve 5 for mounting the rear subframe is provided within the cavity. A cavity 101 is formed within the longitudinal beam body 1, and a reinforcing plate 102 is provided within the cavity 101. Viewed from the left-right direction of the entire vehicle, the reinforcing plate 102 overlaps with at least a portion of the rear floor crossbeam connection.

[0076] In the preferred embodiment of the above rear floor longitudinal beam structure, the specific configuration and arrangement of the longitudinal beam body 1, the rear subframe mounting component 2, and the rear floor crossbeam connecting part can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the longitudinal beam body 1, the rear subframe mounting component 2, and the rear floor crossbeam connecting part can also be referred to the descriptions in the above exemplary embodiments.

[0077] The rear floor longitudinal beam structure of this embodiment adopts the above design. By setting the rear subframe mounting component 2 at the bottom of the longitudinal beam body 1, the dimension of the longitudinal beam body 1 in the overall vehicle height direction is increased, and the cross-sectional area of ​​the longitudinal beam body 1 at the rear subframe mounting point is increased. This improves the lateral strength and stiffness of the longitudinal beam body 1 at the rear subframe mounting point. At the same time, the upper connecting plate 3 and the lower connecting plate 4 can form a multi-node connection structure between the longitudinal beam body 1 and the rear floor crossbeam 6, so that the rear floor crossbeam connection part reinforces the side of the longitudinal beam body 1, further improving the lateral stiffness of the rear subframe mounting point on the longitudinal beam body 1, thereby improving the overall rigidity of the rear of the vehicle body and thus helping to improve the overall structural stability of the vehicle body.

[0078] An embodiment of the second aspect of this application provides a vehicle having a rear floor longitudinal beam structure as described above.

[0079] In this embodiment, the rear floor longitudinal beam structure increases the cross-sectional area of ​​the longitudinal beam body 1 at the rear subframe mounting point, thereby improving the lateral strength and stiffness of the longitudinal beam body 1 at the rear subframe mounting point. Simultaneously, the rear floor crossbeam connection further reinforces the longitudinal beam body 1, further enhancing its lateral stiffness at the rear subframe mounting point, thus contributing to improved overall vehicle structural stability.

[0080] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the protection scope of the claims of this application.

Claims

1. A rear floor longitudinal beam structure, characterized in that: It includes a longitudinal beam body (1) extending along the front-rear direction of the vehicle, a rear subframe mounting component (2) located at the bottom of the longitudinal beam body (1), and a rear floor crossbeam connecting part located on the side of the longitudinal beam body (1) near the vehicle interior. The rear subframe mounting component (2) protrudes downwards from the longitudinal beam body (1). The rear floor crossbeam connection includes an upper connecting plate (3) and a lower connecting plate (4) stacked together in the vertical direction of the whole vehicle. The upper connecting plate (3) is connected to the longitudinal beam body (1), and the lower connecting plate (4) is connected to the rear subframe mounting component (2).

2. The rear floor longitudinal beam structure according to claim 1, characterized in that: The lower connecting plate (4) has a receiving groove (403) with a top opening. The bottom of the upper connecting plate (3) is inserted into the receiving groove (403), and the upper connecting plate (3) is connected to the lower connecting plate (4).

3. The rear floor longitudinal beam structure according to claim 2, characterized in that: The lower connecting plate (4) includes a bottom plate (401) and side plates (402) disposed on two opposite sides of the bottom plate (401). The base plate (401) has an extension (4011) extending to the bottom of the rear subframe mounting (2), the extension (4011) being connected to the rear subframe mounting (2), and the side plate (402) being connected to both the rear subframe mounting (2) and the upper connecting plate (3).

4. The rear floor longitudinal beam structure according to claim 1, characterized in that: Viewed vertically from the perspective of the entire vehicle, along the direction close to the longitudinal beam body (1), the width of the upper connecting plate (3) gradually increases in the longitudinal direction of the entire vehicle; and / or, Looking at the vehicle vertically, along the direction close to the longitudinal beam body (1), the width of the lower connecting plate (4) gradually increases in the vehicle front-rear direction.

5. The rear floor longitudinal beam structure according to claim 1, characterized in that: Viewed from the front-rear direction of the vehicle, the rear floor crossbeam connection is triangular, and along the direction away from the longitudinal beam body (1), the top of the upper connecting plate (3) gradually slopes downward, and the bottom of the lower connecting plate (4) gradually slopes upward.

6. The rear floor longitudinal beam structure according to claim 1, characterized in that: Viewed from the left and right side of the vehicle, the lower connecting plate (4) overlaps with at least part of the rear subframe mounting piece (2).

7. The rear floor longitudinal beam structure according to claim 1, characterized in that: The rear subframe mounting component (2) has an upwardly protruding part (2031) on the side near the vehicle interior. The protruding portion (2031) is sandwiched between the upper connecting plate (3) and the longitudinal beam body (1), and the protruding portion (2031) is connected to both the upper connecting plate (3) and the longitudinal beam body (1).

8. The rear floor longitudinal beam structure according to claim 1, characterized in that: The rear subframe mounting component (2) is a box-shaped structure with an open top, and forms a cavity with the longitudinal beam body (1); The cavity is provided with an installation sleeve (5) for installing the rear subframe. The two ends of the installation sleeve (5) are respectively connected to the longitudinal beam body (1) and the rear subframe mounting component (2).

9. The rear floor longitudinal beam structure according to any one of claims 1 to 8, characterized in that: A cavity (101) is formed inside the longitudinal beam body (1), and the cavity (101) extends along the length direction of the longitudinal beam body (1); The cavity (101) is provided with a reinforcing plate (102), which overlaps with at least part of the rear floor beam connection when viewed from the left and right direction of the vehicle.

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

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