A rear floor assembly and vehicle

Abstract

The application discloses a rear floor assembly and a vehicle, and relates to the technical field of vehicles.The rear floor assembly comprises a rear longitudinal beam, the cross section of which is hollow frame-shaped, and the bottom wall of the rear longitudinal beam is provided with a first opening; an installation cylinder, the bottom end opening of which is connected with the first opening, so that a shock absorber is inserted into the installation cylinder from below the rear longitudinal beam to be fixed; and a connecting plate, which is fixed between the top of the installation cylinder and the top wall of the rear longitudinal beam, and extends along the width direction of the rear longitudinal beam, and the connecting plate comprises a fixed part which is connected with the top of the installation cylinder, and an extension part which is attached to the inner surface of the top wall of the rear longitudinal beam.The installation cylinder is installed on the bottom wall of the rear longitudinal beam, so that the performance requirements of the rear suspension system can be met, and the space of the trunk can be ensured; the connecting plate is arranged between the top of the installation cylinder and the top wall of the rear longitudinal beam, so that the overall strength, rigidity and fatigue resistance of the rear longitudinal beam can be ensured.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically to a rear floor assembly and a vehicle. Background Technology

[0002] With technological advancements and rising living standards, consumers are increasingly demanding higher levels of space, comfort, and reliability in their vehicles. Trunk space is a crucial factor. For the common rear suspension system with a separate spring and shock absorber design, the placement of the shock absorbers encroaches on trunk space, narrowing its width. While integrating the shock absorbers and rear suspension springs under the floor can increase trunk width, the rear suspension springs and shock absorbers require a certain height to achieve the desired performance. Furthermore, directly fixing them under the rear longitudinal beam to ensure vehicle rigidity and strength necessitates raising the longitudinal beam, which in turn reduces trunk height and overall space. Summary of the Invention

[0003] The present invention aims to provide a rear floor assembly and vehicle to solve one or more technical problems existing in the prior art, and at least provide an advantageous alternative or create conditions.

[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows:

[0005] Firstly, this invention provides a rear floor assembly, including a rear longitudinal beam with a hollow frame cross-section, the bottom wall of which has a first opening; a mounting cylinder, the bottom opening of which is connected to the first opening, so that a shock absorber is inserted into the mounting cylinder from below the rear longitudinal beam and fixed thereon; and a connecting plate, which is fixed between the top of the mounting cylinder and the top wall of the rear longitudinal beam and extends along the width direction of the rear longitudinal beam, the connecting plate including a fixing part that fits and connects to the top of the mounting cylinder and an extension part that fits and connects to the inner surface of the top wall of the rear longitudinal beam.

[0006] The beneficial effects of this invention are as follows: By installing the mounting cylinder on the bottom wall of the rear longitudinal beam, the internal space of the rear longitudinal beam can be utilized in the height direction for the installation of the shock absorber, thus meeting both the performance requirements of the rear suspension system and ensuring sufficient space in the luggage compartment. The use of a connecting plate to install the mounting cylinder allows for easy adjustment of the connecting plate's strength to match different loads. Furthermore, the connecting plate's placement between the top of the mounting cylinder and the top wall of the rear longitudinal beam effectively prevents loosening of the connection. The reliable connection of the connecting plate helps ensure the overall strength, stiffness, and fatigue resistance of the rear longitudinal beam.

[0007] As a further improvement to the above technical solution, the rear longitudinal beam includes a rear longitudinal beam upper plate and a rear longitudinal beam outer plate. The rear longitudinal beam upper plate has an upward-facing side flange on its outer side in the width direction, which is opposite to the rear longitudinal beam outer plate. The connecting plate has an upward-facing first side edge on its outer side in the width direction, which is fixed between the side flange and the rear longitudinal beam outer plate. This creates a three-layer plate structure at the outer corner of the rear longitudinal beam upper plate, further improving the overall strength, stiffness, and fatigue resistance of the rear longitudinal beam. The first side edge, sandwiched between the side flange of the rear longitudinal beam upper plate and the rear longitudinal beam outer plate, enhances the connection strength between the connecting plate and the rear longitudinal beam upper plate, effectively reducing the possibility of welding cracks or loosening of bolt connections between the connecting plate and the rear longitudinal beam upper plate.

[0008] As a further improvement to the above technical solution, the rear longitudinal beam includes an inner side plate, and the connecting plate has a second side extending downward on its inner side in the width direction, the second side being attached to the inner side plate of the rear longitudinal beam. This creates a double-layer plate structure at the inner corner of the upper plate of the rear longitudinal beam, further improving the overall strength, stiffness, and fatigue resistance of the rear longitudinal beam.

[0009] As a further improvement to the above technical solution, the rear floor assembly further includes a rear floor, a first crossbeam and a second crossbeam transversely disposed above the rear floor; the first crossbeam is disposed in front of the mounting cylinder, and the second crossbeam is disposed behind the mounting cylinder. This can improve the strength and rigidity of the rear floor assembly.

[0010] As a further improvement to the above technical solution, the rear floor assembly further includes a first extension beam and a second extension beam transversely disposed above the rear longitudinal beam; the first extension beam is disposed in front of the mounting cylinder, and its inward-facing end is connected to the first crossbeam; the second extension beam is disposed behind the mounting cylinder, and its inward-facing end is connected to the second crossbeam. This improves the strength and rigidity of the rear floor assembly.

[0011] As a further improvement to the above technical solution, the rear floor assembly also includes a third crossbeam disposed in front of the mounting cylinder and a fourth crossbeam disposed behind the mounting cylinder, both of which are disposed below the rear floor.

[0012] As a further improvement to the above technical solution, the rear floor assembly also includes a rear wheel arch inner plate and a rear wheel arch reinforcement plate. The rear wheel arch inner plate is connected to the outside of the rear longitudinal beam, and the rear wheel arch reinforcement plate is disposed inside the rear wheel arch inner plate and extends in the vertical direction. The other end of the first extension beam facing outward is connected to the rear wheel arch reinforcement plate, and the other end of the second extension beam facing outward is connected to the rear wheel arch reinforcement plate.

[0013] As a further improvement to the above technical solution, the first extension beam has a rearwardly extending first flange, and the first flange, the top wall of the rear longitudinal beam, and the extension portion of the connecting plate are stacked from top to bottom; the second extension beam has a forwardly extending second flange, and the second flange, the top wall of the rear longitudinal beam, and the extension portion of the connecting plate are stacked from top to bottom. This not only increases the strength and stiffness of the connection between the connecting plate and the rear longitudinal beam, but also improves the overall strength and stiffness of the rear longitudinal beam.

[0014] As a further improvement to the above technical solution, a first reinforcing plate is provided in front of the mounting cylinder and a second reinforcing plate is provided behind the mounting cylinder within the hollow interior of the rear longitudinal beam. Both the first and second reinforcing plates are transversely arranged in the width direction of the rear longitudinal beam. Since the hollow frame-shaped transverse section of the rear longitudinal beam is divided into two parts in the width direction by the mounting cylinder, this division reduces the torsional stiffness of the rear longitudinal beam at the damper mounting location. The provision of the transversely extending first and second reinforcing plates can compensate for the reduction in torsional stiffness of the rear longitudinal beam at the damper mounting location.

[0015] As a further improvement to the above technical solution, both the first reinforcing plate and the second reinforcing plate are arranged at an angle. This angled arrangement increases the area of ​​the first and second reinforcing plates, thereby enabling them to provide greater reinforcement.

[0016] As a further improvement to the above technical solution, the first reinforcing plate and the second reinforcing plate are arranged at an angle to each other, and the distance between the first reinforcing plate and the second reinforcing plate gradually decreases from top to bottom. This allows for more space in the area outside the mounting cylinder on the lower plate of the rear longitudinal beam to accommodate other fasteners.

[0017] As a further improvement to the above technical solution, the contact surface between the first crossbeam and the inner wall of the rear longitudinal beam is the first contact surface, and the contact surface between the first reinforcing plate and the inner wall of the rear longitudinal beam is the second contact surface. The first contact surface and the second contact surface at least partially overlap. In this way, the first crossbeam is not only connected to the first extension beam, but also to the first reinforcing plate. The first crossbeam, the first extension beam, and the first reinforcing plate can jointly form a stable load-bearing structure, resulting in better strength and rigidity of the rear bottom plate assembly.

[0018] As a further improvement to the above technical solution, the contact surface between the second crossbeam and the inner wall of the rear longitudinal beam is the third contact surface, and the contact surface between the second reinforcing plate and the inner wall of the rear longitudinal beam is the fourth contact surface. The third contact surface and the fourth contact surface at least partially overlap. In this way, the second crossbeam, the second extension beam, and the second reinforcing plate can form a stable load-bearing structure.

[0019] As a further improvement to the above technical solution, the rear longitudinal beam includes a rear longitudinal beam lower plate, the rear longitudinal beam lower plate includes a first lower plate and a second lower plate that are arranged and fixedly connected in the longitudinal direction of the rear longitudinal beam, and the first opening is provided on one of the first lower plate or the second lower plate.

[0020] Furthermore, the present invention also provides a vehicle comprising the rear floor assembly described in the above technical solution. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the rear floor assembly according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A schematic diagram of the structure after removing some parts;

[0023] Figure 3 This is a schematic diagram of the structure of the first crossbeam in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the transverse cross-section of the rear longitudinal beam at the vibration damper installation position according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the longitudinal section of the rear longitudinal beam at the vibration damper installation position according to an embodiment of the present invention (some parts are not shown).

[0026] Figure 6 yes Figure 5 A magnified view of a portion of the image;

[0027] Figure 7 This is a schematic diagram of the structure of the mounting cylinder according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the connection between the crossbeam and the extension beam in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the lower plate of the rear longitudinal beam in an embodiment of the present invention. Detailed Implementation

[0030] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0032] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0033] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0034] Reference Figure 1 The present invention describes a rear floor assembly according to an embodiment of the present invention. The rear floor assembly includes a rear floor 1300, a pair of rear longitudinal beams 100 disposed on the left and right sides of the rear floor 1300, a mounting cylinder 200 installed inside the rear longitudinal beams, and a connecting plate 300 connecting the rear longitudinal beams 100 and the mounting cylinder 200.

[0035] Specifically, the rear longitudinal beam 100 includes an upper rear longitudinal beam plate 110, a lower rear longitudinal beam plate 120, an outer rear longitudinal beam plate 130, and an inner rear longitudinal beam plate 140. The upper rear longitudinal beam plate 110 forms the top wall of the rear longitudinal beam 100, the lower rear longitudinal beam plate 120 forms the bottom wall of the rear longitudinal beam 100, the outer rear longitudinal beam plate 130 forms the outer side wall of the rear longitudinal beam 100, and the inner rear longitudinal beam plate 140 forms the inner side wall of the rear longitudinal beam 100. In this embodiment, the upper rear longitudinal beam plate 110 and the inner rear longitudinal beam plate 140 are formed as an integral stamped structure with an L-shaped transverse cross-section. The upper rear longitudinal beam plate 110, the lower rear longitudinal beam plate 120, the outer rear longitudinal beam plate 130, and the inner rear longitudinal beam plate 140 make the rear longitudinal beam 100 a hollow frame structure with a cross-section.

[0036] It should be noted that, in this embodiment, the transverse section refers to the section produced by cutting with a plane perpendicular to the length direction of the vehicle, which is also the front-to-back direction of the vehicle; the longitudinal section refers to the section produced by cutting with a plane perpendicular to the width direction of the vehicle, which is also the left-to-right direction of the vehicle; and the vertical section refers to the section produced by cutting with a plane perpendicular to the surface of the rear floor.

[0037] The bottom wall of the rear longitudinal beam 100 has a first opening 121. The mounting cylinder 200 is a cylindrical structure with an open bottom end, and its bottom opening connects to the first opening 121 on the bottom wall of the rear longitudinal beam 100. Thus, the mounting cylinder 200 creates a concave cavity in the rear longitudinal beam 100, which is used to accommodate the shock absorber integrated with the rear suspension spring. During vehicle assembly, the shock absorber is inserted into the mounting cylinder 200 from below the rear longitudinal beam 100 for fixation. This arrangement allows the shock absorber to be installed in the vertical direction, utilizing the internal space of the rear longitudinal beam 100, thus meeting both the performance requirements of the rear suspension system and ensuring sufficient space in the trunk. The vertical direction refers to the vertical movement of the vehicle. By providing a first opening 121 on the bottom wall of the rear longitudinal beam 100 and connecting it to the cylindrical mounting cylinder 200, the mounting cylinder and the rear longitudinal beam can still form a closed section. It is understood that a closed section has higher strength and stiffness than an open section. Therefore, by installing the vibration damper through the mounting cylinder 200, the impact on the strength and stiffness of the rear longitudinal beam 100 can be reduced.

[0038] The mounting cylinder 200 and the lower plate 120 of the rear longitudinal beam can be either a separate connection or an integral stamped structure. In this embodiment, the mounting cylinder 200 and the lower plate 120 of the rear longitudinal beam are a separate connection, and the mounting cylinder 200 is also a separate structure. Specifically, the mounting cylinder 200 includes a top cover 210 and two semi-circular cylinder walls 220 that are joined together in the circumferential direction. It also includes an annular fastener 230 that connects the bottom end of the cylinder wall 220 and the first opening 121. The fastener 230 has an L-shaped cross-section in the vertical direction, with one end connected to the cylinder wall 220 and the other end connected to the lower plate 120 of the rear longitudinal beam. Furthermore, the fastener 230 is integrally stamped to connect the two cylinder walls 220 and the lower plate 120 of the rear longitudinal beam, making the stress on the mounting cylinder 200 and the lower plate 120 of the rear longitudinal beam more uniform and effectively reducing the stress concentration at the joint of the two cylinder walls 220. The top cover 210, cylinder wall 220, and fastener 230 are all stamped from materials with higher strength than the upper plate 110 and lower plate 120 of the rear longitudinal beam, so that the vehicle can withstand a greater load.

[0039] The connecting plate 300 is fixed between the top of the mounting cylinder 200 and the top wall of the rear longitudinal beam 100, and extends along the width direction of the rear longitudinal beam 100. The connecting plate 300 can be fixedly connected to the mounting cylinder 200 and the top wall of the rear longitudinal beam 100 by means of bolts or welding. The connecting plate 300 includes a fixing part that fits against the top of the mounting cylinder 200, and an extension part that fits against the inner surface of the top wall of the rear longitudinal beam 100.

[0040] Reference Figure 2 and Figure 4As shown, the main body of the connecting plate 300 is a plate-like structure. A stepped groove 350 is provided approximately in the middle of the connecting plate 300 to increase its strength. The area of ​​the connecting plate 300 other than the stepped groove 350 is the extension, which fits against the inner surface of the top wall of the rear longitudinal beam 100, further increasing its strength. The bottom of the stepped groove 350 is the fixing part, which fits against the top of the mounting cylinder 200. Both the bottom of the stepped groove 350 and the top of the mounting cylinder 200 have mounting holes for installing vibration dampers. The mounting holes include a central vibration damper insertion hole and several bolt insertion holes surrounding it. It can be understood that the stepped groove 350 can protrude upwards towards the rear longitudinal beam or be recessed downwards towards the rear longitudinal beam. Furthermore, in this embodiment, the material strength of the connecting plate 300 is higher than that of the rear longitudinal beam 100. Compared to directly mounting the shock absorber on the upper plate 110 of the rear longitudinal beam, increasing the strength of the connecting plate 300 allows the rear longitudinal beam to withstand greater impacts from the shock absorber. It is understood that in other embodiments, the material strength of the connecting plate 300 can be reasonably adjusted according to the actual load.

[0041] Based on the working characteristics of the shock absorber, the rear longitudinal beam 100 is subjected to frequent vibration loads at the installation location of the shock absorber. Related parts are prone to fatigue damage due to frequent vibration, such as loose screw connections and weld cracks. The connecting plate 300 is sandwiched between the top of the mounting cylinder 200 and the top wall of the rear longitudinal beam 100. When the shock absorber impacts upward and applies an upward thrust to the connecting plate 300, the upward movement tendency of the connecting plate 300 is blocked by the upper plate 110 of the rear longitudinal beam located above it. When the shock absorber impacts downward and applies a downward pull to the connecting plate 300, the cylindrical structure of the mounting cylinder 200 has a large rigidity, and the downward movement tendency of the connecting plate 300 relative to the upper plate 110 of the rear longitudinal beam can be prevented by the mounting cylinder 200. In other words, the connecting plate 300 can be stably connected to the upper plate 110 of the rear longitudinal beam and the mounting cylinder 200, thereby effectively ensuring the reliable connection between the connecting plate 300 and the upper plate 110 of the rear longitudinal beam and the mounting cylinder 200, and thus ensuring the overall strength, rigidity and fatigue resistance of the rear longitudinal beam.

[0042] A second opening 111 is provided on the upper plate 110 of the rear longitudinal beam at the position corresponding to the stepped groove 350 of the connecting plate 300. The second opening 111 exposes the fixing part to the outside, which facilitates the installation and maintenance of the vibration damper and allows the rear longitudinal beam to be lightweight while meeting the strength requirements.

[0043] In this embodiment of the invention, by placing the mounting cylinder 200 inside the rear longitudinal beam, the shock absorber can be installed in the height direction using the internal space of the rear longitudinal beam 100, which satisfies both the performance requirements of the rear suspension system and ensures sufficient space in the luggage compartment. Simultaneously, the connecting plate 300 increases the installation strength of the shock absorber. Positioning the connecting plate 300 between the top of the mounting cylinder 200 and the top wall of the rear longitudinal beam 100 effectively ensures the connection strength between the connecting plate 300 and the upper plate 110 of the rear longitudinal beam and the mounting cylinder 200, thereby improving the overall strength, stiffness, and fatigue resistance of the rear longitudinal beam.

[0044] Furthermore, the upper plate 110 of the rear longitudinal beam has an upward-facing side flange 112 formed on its outer side in the width direction. The side flange 112 is opposite to the outer plate 130 of the rear longitudinal beam. When the upper plate 110 of the rear longitudinal beam and the outer plate 130 of the rear longitudinal beam are connected, the side flange 112 covers the edge of the outer plate 130 of the rear longitudinal beam. The connecting plate 300 also has an upward-extending first side edge 310 formed on its outer side in the width direction. The first side edge 310 is fixed between the side flange 112 of the upper plate 110 of the rear longitudinal beam and the outer plate 130 of the rear longitudinal beam. That is to say, by extending the first side edge 310, the connecting plate 300 forms a three-layer plate structure at the outer corner of the upper plate 110 of the rear longitudinal beam, which can further improve the overall strength, stiffness and fatigue resistance of the rear longitudinal beam. Furthermore, the first side 310, which is sandwiched between the side flange 112 of the upper plate 110 of the rear longitudinal beam and the outer side plate 130 of the rear longitudinal beam, can enhance the connection strength between the connecting plate 300 and the upper plate 110 of the rear longitudinal beam, effectively reducing the possibility of welding cracks or loose bolt connections between the connecting plate 300 and the upper plate 110 of the rear longitudinal beam.

[0045] The connecting plate 300 also has a second side 320 extending downward on its inner side in the width direction, and the second side 320 is attached to the inner side plate 140 of the rear longitudinal beam. That is to say, by extending the second side 320, the connecting plate 300 forms a double-layer plate structure at the inner corner of the upper plate 110 of the rear longitudinal beam, which can improve the overall strength, stiffness and fatigue resistance of the rear longitudinal beam.

[0046] Furthermore, the rear floor assembly also includes a crossbeam assembly, a rear wheel arch inner panel 1000, and a rear wheel arch reinforcement plate 1100. The rear wheel arch inner panel 1000 is connected to the outer side of the rear longitudinal beam 100, and the rear wheel arch reinforcement plate 1100 is disposed inside the rear wheel arch inner panel 1000 and extends in the vertical direction, serving to increase the structural strength of the rear wheel arch inner panel 1000. The crossbeam assembly is arranged laterally along the width direction of the rear floor 1300 to connect a pair of rear longitudinal beams 100 on the left and right sides of the rear floor 1300 and the rear wheel arch reinforcement plate 1100.

[0047] The crossbeam assembly includes a first crossbeam assembly positioned in front of the mounting cylinder 200 and a second crossbeam assembly positioned behind the mounting cylinder 200. The first crossbeam assembly includes a first crossbeam 600, and the second crossbeam assembly includes a second crossbeam 700. Positioning the first and second crossbeam assemblies in front of and behind the mounting cylinder 200 respectively improves the strength and rigidity of the rear floor assembly. Rigidity includes static stiffness and dynamic stiffness. Dynamic stiffness measures a vehicle's ability to resist deformation under dynamic loads, which is crucial for improving ride comfort and driving stability.

[0048] The first crossbeam group also includes a first extension beam 800, and the second crossbeam group also includes a second extension beam 900. The first crossbeam 600 is connected to the first extension beam 800 in the transverse direction, and the second crossbeam 700 is connected to the second extension beam 900 in the transverse direction to further enhance the strength and rigidity of the rear floor 1300 and the rear longitudinal beam 100.

[0049] Specifically, the first crossbeam 600 is positioned above the rear floor 1300, covering the rear floor 1300 and forming a beam structure with a roughly rectangular longitudinal cross-section together with the rear floor 1300. The first extension beam 800 is positioned above the rear longitudinal beam 100, covering the upper plate 110 of the rear longitudinal beam and forming a beam structure with a roughly rectangular longitudinal cross-section together with the upper plate 110 of the rear longitudinal beam. The first crossbeam 600 and the first extension beam 800 are connected in the transverse direction to jointly enhance the strength and rigidity of the rear floor 1300 and the rear longitudinal beam 100. One end of the first extension beam 800 facing inward is connected to the first crossbeam 600, and the other end facing outward is connected to the rear wheel arch reinforcement plate 1100. In this way, the first crossbeam 600, the first extension beam 800, and the rear wheel arch reinforcement plate 1100 constitute a continuous force transmission structure.

[0050] More specifically, the first crossbeam 600, at the portion extending in the width direction of the rear floor 1300, has a U-shaped cross section with flanges in the vertical direction. That is, the first crossbeam 600 includes a U-shaped groove opening downwards and flanges extending outwards in a generally horizontal direction along the two edges of the lower opening end of the U-shaped groove. The flanges are configured to fit against the surface of the rear floor 1300.

[0051] Furthermore, the first crossbeam 600 is also connected to the inner side plate 140 of the rear longitudinal beam. The first crossbeam 600 has connecting portions at its left and right ends, and these connecting portions connect to the rear longitudinal beams 100 on both sides. The connecting portion on one side will be described below, referring to... Figure 3As shown, the first end of the U-shaped groove opposite to the inner side plate 140 of the rear longitudinal beam has a first side 601 and a second side 602 in a vertical direction. The first side 601 and the second side 602 are opposite each other. The first side 601 has a forward flange 603 that is fitted and connected to the inner side plate 140 of the rear longitudinal beam, and the second side 602 has a rear flange 604 that is fitted and connected to the inner side plate 140 of the rear longitudinal beam. The first crossbeam 600 is fixedly connected to the inner side plate 140 of the rear longitudinal beam through the front flange 603 and the rear flange 604. In some other embodiments, the connecting part can also adopt other structures to achieve a fixed connection with the inner side plate 140 of the rear longitudinal beam.

[0052] The first extension beam 800 is disposed above the rear longitudinal beam 100. The first extension beam 800 covers the width of the upper plate 110 of the rear longitudinal beam. Its vertical cross-section is a U-shaped shape with flanges. That is, the first extension beam 800 includes a U-shaped groove that opens downwards and flanges that extend outwards along the two edges of the lower opening end of the U-shaped groove. The flanges are configured to fit against the upper plate 110 of the rear longitudinal beam.

[0053] The first extension beam 800 is located in the rear groove wall, and its lower edge flange extends rearward to form a first flange 830. The extension of the connecting plate 300 includes a front extension plate 330 extending forward. (Refer to...) Figure 5 and Figure 6 As shown, the rearward extension of the first flange 830 causes the first flange 830 and the front extension plate 330 to sandwich the upper plate 110 of the rear longitudinal beam in the middle. Preferably, the first flange 830 extends rearward until it reaches the front edge of the second opening 111. Viewed from front to back, the first flange 830 is first stacked with the upper plate 110 of the rear longitudinal beam to form a double-layer plate structure. Continuing rearward, the first flange 830, the upper plate 110 of the rear longitudinal beam, and the front extension plate 330 are stacked from top to bottom to form a triple-layer plate structure, which can improve the strength and rigidity of the rear longitudinal beam.

[0054] In addition, refer to Figure 8 As shown, the first extension beam 800 has a first crossbeam overlap portion 810 extending to the top of the first crossbeam 600 at its inner end in the width direction. The end of the first crossbeam overlap portion 810 is a U-shaped groove structure with the opening facing downward. The first crossbeam overlap portion 810 is pressed against the end of the first crossbeam 600 to be fixedly connected to the first crossbeam 600.

[0055] In addition, the first extension beam 800 has an upwardly extending rear wheel cover first overlap portion 820 at its outer end in the width direction. The end of the rear wheel cover first overlap portion 820 includes a U-shaped groove structure with an opening facing the rear wheel cover. The rear wheel cover reinforcing plate 1100 is also provided with a U-shaped groove that mates with the U-shaped groove at the end of the rear wheel cover first overlap portion 820. The U-shaped grooves mate with each other to fix the rear wheel cover reinforcing plate 1100 to the first extension beam 800.

[0056] The second crossbeam 700 is positioned above the rear floor 1300, covering the rear floor 1300 and forming a beam structure with a roughly rectangular longitudinal cross-section together with the rear floor 1300. The second extension beam 900 is positioned above the rear longitudinal beam 100, covering the upper plate 110 of the rear longitudinal beam and forming a beam structure with a roughly rectangular longitudinal cross-section together with the upper plate 110 of the rear longitudinal beam. The second crossbeam 700 and the second extension beam 900 are connected in the transverse direction to jointly enhance the strength and rigidity of the rear floor 1300 and the rear longitudinal beam 100. One end of the second extension beam 900 facing inward is connected to the second crossbeam 700, and the other end facing outward is connected to the rear wheel arch reinforcement plate 1100. In this way, the first crossbeam 600, the first extension beam 800, and the rear wheel arch reinforcement plate 1100 constitute a continuous force transmission structure.

[0057] The structure of the second crossbeam 700 is roughly the same as that of the first crossbeam 600. The second crossbeam 700 also has connecting parts at its left and right ends that connect to the rear longitudinal beams 100 on both sides, respectively. The structure of these connecting parts is also roughly the same as that of the connecting parts of the first crossbeam 600.

[0058] The second extension beam 900 is disposed above the rear longitudinal beam 100, covering the width of the upper plate 110 of the rear longitudinal beam. Its vertical cross-section is a U-shaped section with flanges; that is, the second extension beam 900 includes a U-shaped groove opening downwards and flanges extending outwards from the two edges of the lower opening end of the U-shaped groove. The flanges are configured to fit snugly against the upper plate 110 of the rear longitudinal beam. The second extension beam 900 is located in the front groove wall, and its lower edge flange extends forward with a second flange 930. The extension portion of the connecting plate 300 includes a rear extension plate 340 extending rearwards. (Refer to...) Figure 5 and Figure 6 As shown, the forward extension of the second flange 930 allows the second flange 930 and the rear extension plate 340 to sandwich the upper plate 110 of the rear longitudinal beam in the middle. Preferably, the second flange 930 extends forward until it reaches the rear edge of the second opening 111. Viewed from back to front, the second flange 930 first overlaps with the upper plate 110 of the rear longitudinal beam to form a double-layer plate structure. Continuing backward, the second flange 930, the upper plate 110 of the rear longitudinal beam, and the rear extension plate 340 are stacked from top to bottom to form a triple-layer plate structure, which can improve the strength and rigidity of the rear longitudinal beam.

[0059] In addition, the second extension beam 900 has a second crossbeam overlap portion 910 extending to the top of the second crossbeam 700 at its inner end in the width direction. The end of the second crossbeam overlap portion 910 is a U-shaped groove structure with the opening facing downward. The second crossbeam overlap portion 910 is fastened to the end of the second crossbeam 700 to be fixedly connected to the second crossbeam 700.

[0060] In addition, the second extension beam 900 is provided with an upwardly extending rear wheel cover second overlap portion 920 at the outer end in the width direction. The end of the rear wheel cover second overlap portion 920 includes a U-shaped groove structure with an opening facing the rear wheel cover. The rear wheel cover reinforcing plate 1100 is also provided with a U-shaped groove that mates with the U-shaped groove at the end of the rear wheel cover second overlap portion 920. The U-shaped grooves mate with each other to fix the rear wheel cover reinforcing plate 1100 to the second extension beam 900.

[0061] As can be seen from the above, around the second opening 111 of the upper plate 110 of the rear longitudinal beam, the first flange 830, the upper plate 110 of the rear longitudinal beam, and the front extension plate 330 are stacked from top to bottom to form a three-layer plate structure, and the second flange 930, the upper plate 110 of the rear longitudinal beam, and the rear extension plate 340 are stacked from top to bottom to form a three-layer plate structure. This not only increases the strength and rigidity of the connection between the connecting plate 300 and the rear longitudinal beam, but also improves the overall strength and rigidity of the rear longitudinal beam.

[0062] Furthermore, the first crossbeam group also includes a third crossbeam 610 disposed below the rear floor 1300, and the second crossbeam group also includes a fourth crossbeam 710 disposed below the rear floor 1300. The third crossbeam 610 and the first crossbeam 600 form a vertically corresponding reinforcing structure, and the fourth crossbeam 710 and the second crossbeam 700 form a vertically corresponding reinforcing structure, which can further enhance the strength and rigidity of the rear floor 1300 and the rear longitudinal beam 100.

[0063] Furthermore, the first crossbeam group also includes a first reinforcing plate 400 disposed inside the hollow of the rear longitudinal beam 100, and the second crossbeam group also includes a second reinforcing plate 500 disposed inside the hollow of the rear longitudinal beam 100. The first reinforcing plate 400 is disposed in front of the mounting cylinder 200 and extends laterally in the width direction of the rear longitudinal beam 100, and the second reinforcing plate 500 is disposed behind the mounting cylinder 200 and extends laterally in the width direction of the rear longitudinal beam 100. Due to the arrangement of the mounting cylinder 200, the hollow frame-shaped transverse section of the rear longitudinal beam 100 is divided into two parts in the width direction. This division reduces the torsional stiffness of the rear longitudinal beam at the damper mounting location. However, the laterally extending first reinforcing plate 400 and second reinforcing plate 500 can compensate for the reduction in torsional stiffness of the rear longitudinal beam at the damper mounting location, and even enhance the torsional stiffness of the rear longitudinal beam at the damper mounting location, depending on the structure or material selection of the first reinforcing plate 400 and the second reinforcing plate 500. After the first reinforcing plate 400 and the second reinforcing plate 500 are installed, the first reinforcing plate 400 and the second reinforcing plate 500 in the front-rear direction, the upper plate 110 and the lower plate 120 of the rear longitudinal beam in the vertical direction, and the inner plate 140 and the outer plate 130 of the rear longitudinal beam in the left-right direction can form a box-shaped structure around the installation part of the rear longitudinal beam and the shock absorber. This structure can enhance the stability of the rear longitudinal beam. In particular, the first reinforcing plate 400 and the second reinforcing plate 500 can increase the lateral strength of the rear longitudinal beam, thus compensating for or even improving the torsional stiffness of the rear longitudinal beam at the installation part of the shock absorber.

[0064] To ensure a reliable connection between the first reinforcing plate 400 and the rear longitudinal beam 100, the upper edge of the first reinforcing plate 400 has a fitting edge that connects to the upper plate 110 of the rear longitudinal beam, the lower edge of the first reinforcing plate 400 has a fitting edge that connects to the lower plate 120 of the rear longitudinal beam, and the inner edge of the first reinforcing plate 400 has a fitting edge that connects to the inner plate 140 of the rear longitudinal beam. In this embodiment, the aforementioned fitting edges are flanged structures integrally formed with the first reinforcing plate 400. Furthermore, reinforcing ribs are also provided on the longitudinal surface of the first reinforcing plate 400.

[0065] To ensure a reliable connection between the second reinforcing plate 500 and the rear longitudinal beam 100, the upper edge of the second reinforcing plate 500 has a fitting edge that connects to the upper plate 110 of the rear longitudinal beam, the lower edge of the second reinforcing plate 500 has a fitting edge that connects to the lower plate 120 of the rear longitudinal beam, and the inner edge of the second reinforcing plate 500 has a fitting edge that connects to the inner plate 140 of the rear longitudinal beam. In this embodiment, the aforementioned fitting edges are flanged structures integrally formed with the second reinforcing plate 500. Furthermore, reinforcing ribs are also provided on the longitudinal surface of the second reinforcing plate 500.

[0066] Furthermore, the first reinforcing plate 400 and the second reinforcing plate 500 are arranged at an angle. This angled arrangement increases the area of ​​the first reinforcing plate 400 and the second reinforcing plate 500, thus providing greater reinforcement. Viewing the first reinforcing plate 400 and the second reinforcing plate 500 in a longitudinal section of the rear floor assembly, they are arranged at an angle to each other, with the distance between them gradually decreasing from top to bottom. That is, the lower ends of the first reinforcing plate 400 and the second reinforcing plate 500 are closer to the mounting cylinder 200, while the upper ends are farther from the mounting cylinder 200. This arrangement provides more space in the area outside the mounting cylinder 200 of the rear longitudinal beam lower plate 120 for arranging other components. (Refer to...) Figure 5 As shown, in this embodiment, the lower plate 120 of the rear longitudinal beam is equipped with a subframe fixing member 1200 behind the second reinforcing plate 500.

[0067] Furthermore, the contact surface between the first crossbeam 600 and the inner side plate 140 of the rear longitudinal beam is the first contact surface, and the contact surface between the first reinforcing plate 400 and the inner side plate 140 of the rear longitudinal beam is the second contact surface, with the first contact surface and the second contact surface at least partially overlapping.

[0068] Furthermore, the contact surface between the second crossbeam 700 and the inner side plate 140 of the rear longitudinal beam is the third contact surface, and the contact surface between the second reinforcing plate 500 and the inner side plate 140 of the rear longitudinal beam is the fourth contact surface, with the third contact surface and the fourth contact surface at least partially overlapping.

[0069] From a height perspective, the first extension beam 800 is connected to the first crossbeam 600 and is located above the first crossbeam 600; the inner edge of the first reinforcing plate 400 is connected to the inner plate 140 of the rear longitudinal beam, and the end of the first crossbeam 600 is also connected to the inner plate 140 of the rear longitudinal beam. Since the first contact surface and the second contact surface at least partially overlap, the first crossbeam 600 is connected not only to the first extension beam 800 but also to the first reinforcing plate 400. In this way, the first crossbeam 600, the first extension beam 800, and the first reinforcing plate 400 can together form a stable load-bearing structure, resulting in better strength and rigidity of the rear bottom plate assembly.

[0070] Similarly, the second crossbeam 700, the second extension beam 900, and the second reinforcing plate 500 also constitute a stable load-bearing structure.

[0071] Furthermore, the rear longitudinal beam lower plate 120 includes a first lower plate 122 and a second lower plate 123 that are arranged and fixedly connected along the longitudinal direction of the rear longitudinal beam 100. The first opening 121 is located on either the first lower plate 122 or the second lower plate 123. This facilitates the manufacturing of the rear longitudinal beam lower plate 120, and the first opening 121, being opened on a single, complete plate, also ensures the connection strength between the mounting cylinder 200 and the rear longitudinal beam lower plate 120. Furthermore, the lower ends of the first reinforcing plate 400 and the second reinforcing plate 500 are both connected to the same lower plate, that is, the lower plate where the first opening 121 is located.

[0072] In addition, the present invention also provides a vehicle including the rear floor assembly described in any of the above embodiments.

[0073] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A rear floor assembly, characterized in that, include: The rear longitudinal beam (100) has a hollow frame cross-section, and the bottom wall of the rear longitudinal beam (100) is provided with a first opening (121). Mounting cylinder (200), the bottom opening of which is connected to the first opening (121) so that the shock absorber is inserted into the mounting cylinder (200) from below the rear longitudinal beam (100) and fixed thereon; A connecting plate (300) is fixed between the top of the mounting cylinder (200) and the top wall of the rear longitudinal beam (100), and extends along the width direction of the rear longitudinal beam (100). The connecting plate (300) includes a fixing part that fits and connects to the top of the mounting cylinder (200), and an extension part that fits and connects to the inner surface of the top wall of the rear longitudinal beam (100). The connecting plate (300) is provided with a stepped groove (350), and the area of ​​the connecting plate (300) other than the stepped groove (350) is the extension part. The bottom of the stepped groove (350) is the fixing part. The rear floor assembly further includes a rear floor (1300), a first crossbeam (600) and a second crossbeam (700) transversely disposed above the rear floor (1300); the first crossbeam (600) is disposed in front of the mounting cylinder (200), and the second crossbeam (700) is disposed behind the mounting cylinder (200); the rear floor assembly further includes a first extension beam (800) and a second extension beam (900) transversely disposed above the rear longitudinal beam (100); the first extension beam (800) is disposed in front of the mounting cylinder (200), and one end of the first extension beam (800) facing inward is connected to the first crossbeam (600); the second extension beam (900) is disposed behind the mounting cylinder (200), and one end of the second extension beam (900) facing inward is connected to the second crossbeam (700); The first extension beam (800) has a rearwardly extending first flange (830), and the first flange (830), the top wall of the rear longitudinal beam (100), and the extension of the connecting plate (300) are stacked from top to bottom; the second extension beam (900) has a forwardly extending second flange (930), and the second flange (930), the top wall of the rear longitudinal beam (100), and the extension of the connecting plate (300) are stacked from top to bottom.

2. The rear floor assembly according to claim 1, characterized in that, The rear longitudinal beam (100) includes a rear longitudinal beam upper plate (110) and a rear longitudinal beam outer plate (130). The rear longitudinal beam upper plate (110) has an upward-facing side flange (112) on its outer side in the width direction. The side flange (112) is opposite to the rear longitudinal beam outer plate (130). The connecting plate (300) has an upward-facing first side edge (310) on its outer side in the width direction. The first side edge (310) is fixed between the side flange (112) and the rear longitudinal beam outer plate (130).

3. The rear floor assembly according to claim 2, characterized in that, The rear longitudinal beam (100) includes an inner side plate (140) of the rear longitudinal beam, and the connecting plate (300) has a second side (320) extending downward on the inner side in the width direction, and the second side (320) is attached to the inner side plate (140) of the rear longitudinal beam.

4. The rear floor assembly according to claim 1, characterized in that, The rear floor assembly also includes a third crossbeam (610) disposed in front of the mounting cylinder (200) and a fourth crossbeam (710) disposed behind the mounting cylinder (200), both the third crossbeam (610) and the fourth crossbeam (710) being disposed below the rear floor (1300).

5. The rear floor assembly according to claim 1, characterized in that, The rear floor assembly also includes a rear wheel arch inner plate (1000) and a rear wheel arch reinforcement plate (1100). The rear wheel arch inner plate (1000) is connected to the outside of the rear longitudinal beam (100). The rear wheel arch reinforcement plate (1100) is disposed inside the rear wheel arch inner plate (1000) and extends in the vertical direction. The other end of the first extension beam (800) facing outward is connected to the rear wheel arch reinforcement plate (1100), and the other end of the second extension beam (900) facing outward is connected to the rear wheel arch reinforcement plate (1100).

6. The rear floor assembly according to claim 1, characterized in that, The hollow interior of the rear longitudinal beam (100) is provided with a first reinforcing plate (400) in front of the mounting cylinder (200) and a second reinforcing plate (500) in front of the mounting cylinder (200). The first reinforcing plate (400) and the second reinforcing plate (500) are both arranged laterally in the width direction of the rear longitudinal beam (100).

7. The rear floor assembly according to claim 6, characterized in that, Both the first reinforcing plate (400) and the second reinforcing plate (500) are arranged at an angle.

8. The rear floor assembly according to claim 7, characterized in that, The first reinforcing plate (400) and the second reinforcing plate (500) are arranged at an angle to each other, and the distance between the first reinforcing plate (400) and the second reinforcing plate (500) gradually decreases from top to bottom.

9. The rear floor assembly according to claim 8, characterized in that, The contact surface between the first crossbeam (600) and the inner wall of the rear longitudinal beam (100) is the first contact surface, and the contact surface between the first reinforcing plate (400) and the inner wall of the rear longitudinal beam (100) is the second contact surface. The first contact surface and the second contact surface at least partially overlap.

10. The rear floor assembly according to claim 8, characterized in that, The contact surface between the second crossbeam (700) and the inner wall of the rear longitudinal beam (100) is the third contact surface, and the contact surface between the second reinforcing plate (500) and the inner wall of the rear longitudinal beam (100) is the fourth contact surface. The third contact surface and the fourth contact surface at least partially overlap.

11. The rear floor assembly according to any one of claims 1 to 10, characterized in that, The rear longitudinal beam (100) includes a rear longitudinal beam lower plate (120), the rear longitudinal beam lower plate (120) includes a first lower plate (122) and a second lower plate (123) that are arranged and fixedly connected in the longitudinal direction of the rear longitudinal beam (100), and the first opening (121) is provided on one of the first lower plate (122) or the second lower plate (123).

12. A vehicle, characterized in that, Includes the rear floor assembly as described in any one of claims 1 to 11.

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