Rear floor assembly and vehicle

Abstract

The present application relates to the technical field of vehicles, and discloses a rear floor assembly and a vehicle. The rear floor assembly comprises: a rear longitudinal beam (100), wherein the cross section of the rear longitudinal beam is in a hollowed frame shape, and a first opening (121) is formed in the bottom wall of the rear longitudinal beam (100); a mounting cylinder (200), wherein an opening at the bottom end of the mounting cylinder (200) is connected to the first opening (121), so that a shock absorber is inserted into the mounting cylinder (200) from the lower part of the rear longitudinal beam (100) and fixed; and a connecting plate (300), wherein the connecting plate (300) is fixedly arranged between the top of the mounting cylinder (200) and the top wall of the rear longitudinal beam (100), and extends in the width direction of the rear longitudinal beam (100), and the connecting plate (300) comprises a fixing part attached to the top of the mounting cylinder (200), and an extension part attached to the inner surface of the top wall of the rear longitudinal beam (100).

Description

A rear floor assembly and vehicle

[0001]

[0002] Cross Reference to Related Applications

[0003] This application is based on and claims priority to Chinese Patent Application No. 202411314119.6, filed on September 20, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0004] The present application relates to the technical field of vehicles, in particular to a rear floor assembly and vehicle. BACKGROUND

[0005] With the advancement of technology and the improvement of consumer living quality, people have higher and higher requirements for the space, comfort and reliability of vehicles. Among them, the luggage compartment space size is an important indicator. For the rear suspension system of the common spring-reduction separation design on the market, the arrangement of the shock absorber occupies the luggage compartment space of the vehicle body, making the luggage compartment width narrower. Arranging the shock absorber and the rear suspension spring in combination under the floor can achieve the demand of increasing the luggage compartment width, but the rear suspension spring and the shock absorber need a certain height to realize the performance of the rear suspension system itself, and if they are directly fixed under the rear longitudinal beam to ensure the stiffness and strength of the vehicle body, the rear longitudinal beam needs to be raised, and raising the height of the longitudinal beam will also occupy the height of the luggage compartment, making the luggage compartment space smaller. SUMMARY

[0006] The present application aims to provide a rear floor assembly and vehicle to solve one or more technical problems existing in the prior art, at least to provide a beneficial choice or create conditions.

[0007] Firstly, the present application provides a rear floor assembly, comprising a rear longitudinal beam, the cross section of which is a hollow frame shape, and a bottom wall of the rear longitudinal beam is provided with a first opening; a mounting cylinder, a bottom end opening of the mounting cylinder is connected with the first opening, so that the shock absorber is inserted into the mounting cylinder from below the rear longitudinal beam for fixation; a connecting plate, the connecting plate 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 comprises a fixed part connected with the top of the mounting cylinder, and an extension part connected with the inner surface of the top wall of the rear longitudinal beam.

[0008] The application has the advantages that the mounting cylinder is mounted on the bottom wall of the rear longitudinal beam, so that the mounting of the shock absorber in the height direction can utilize the internal space of the rear longitudinal beam, and both the performance requirements of the rear suspension system and the space of the trunk can be met. The mounting cylinder is mounted by the connecting plate, so that the strength of the connecting plate can be adjusted to match different loads. The connecting plate is arranged between the top of the mounting cylinder and the top wall of the rear longitudinal beam, so that the connection of the connecting plate can be effectively avoided from loosening, and the reliable connection of the connecting plate is beneficial to ensuring the overall strength, rigidity and fatigue resistance of the rear longitudinal beam.

[0009] In some examples, the rear longitudinal beam includes a rear longitudinal beam upper plate and a rear longitudinal beam outer plate, the rear longitudinal beam upper plate is formed with a rollover edge facing upwards on the outer side in the width direction, the rollover edge is opposite to the rear longitudinal beam outer plate, the connecting plate is formed with a first side edge facing upwards on the outer side in the width direction, and the first side edge is fixed between the rollover edge and the rear longitudinal beam outer plate. In this way, a three-layer plate structure is formed at the outer corner of the rear longitudinal beam upper plate, so that the overall strength, rigidity and fatigue resistance of the rear longitudinal beam can be improved. The first side edge is clamped between the rollover edge of the rear longitudinal beam upper plate and the rear longitudinal beam outer plate, so that the connection strength between the connecting plate and the rear longitudinal beam upper plate can be enhanced, and the welding cracking or loosening of the bolt connection between the connecting plate and the rear longitudinal beam upper plate can be effectively reduced.

[0010] In some examples, the rear longitudinal beam includes a rear longitudinal beam inner plate, and the connecting plate is formed with a second side edge extending downwards on the inner side in the width direction, and the second side edge is attached to the rear longitudinal beam inner plate. In this way, a double-layer plate structure is formed at the inner corner of the rear longitudinal beam upper plate, so that the overall strength, rigidity and fatigue resistance of the rear longitudinal beam can be improved.

[0011] In some examples, the rear floor assembly further includes a rear floor, a first cross beam and a second cross beam transversely arranged above the rear floor; the first cross beam is arranged in front of the mounting cylinder, and the second cross beam is arranged behind the mounting cylinder. In this way, the strength and rigidity of the rear floor assembly can be improved.

[0012] In some examples, the rear floor assembly further includes a first extension beam and a second extension beam transversely arranged above the rear longitudinal beam; the first extension beam is arranged in front of the mounting cylinder, and an inner side end of the first extension beam is connected to the first cross beam; the second extension beam is arranged behind the mounting cylinder, and an inner side end of the second extension beam is connected to the second cross beam. In this way, the strength and rigidity of the rear floor assembly can be improved.

[0013] In some examples, the rear floor assembly further includes a third cross beam arranged in front of the mounting cylinder and a fourth cross beam arranged behind the mounting cylinder, and the third cross beam and the fourth cross beam are both arranged below the rear floor.

[0014] In some examples, the rear floor assembly further comprises a rear wheelhouse inner panel connected to the outer side of the rear longitudinal beam, and a rear wheelhouse reinforcement panel disposed inside the rear wheelhouse inner panel and extending in the up-down direction, the other end of the first extension beam toward the outer side being connected to the rear wheelhouse reinforcement panel, and the other end of the second extension beam toward the outer side being connected to the rear wheelhouse reinforcement panel.

[0015] In some examples, the first extension beam has a first flange extending rearward, the first flange, the top wall of the rear longitudinal beam, and the extension of the mounting cylinder being stacked from top to bottom; and the second extension beam has a second flange extending forward, the second flange, the top wall of the rear longitudinal beam, and the extension of the mounting cylinder being stacked from top to bottom. In this way, not only can the strength and rigidity of the connection between the connecting plate and the rear longitudinal beam be increased, but also the overall strength and rigidity of the rear longitudinal beam can be improved.

[0016] In some examples, the hollow interior of the rear longitudinal beam is provided with a first reinforcement panel in front of the mounting cylinder and a second reinforcement panel behind the mounting cylinder, and the first reinforcement panel and the second reinforcement panel are both disposed transversely in the width direction of the rear longitudinal beam. Since the transverse section of the hollow frame-shaped rear longitudinal beam is divided into two parts by the mounting cylinder, this division reduces the torsional rigidity of the rear longitudinal beam at the shock absorber mounting position. The provision of the first reinforcement panel and the second reinforcement panel extending transversely can compensate for the weakening of the torsional rigidity of the rear longitudinal beam at the shock absorber mounting position.

[0017] In some examples, the first reinforcement panel and the second reinforcement panel are both arranged obliquely. Oblique arrangement can increase the area of the first reinforcement panel and the second reinforcement panel, so that the first reinforcement panel and the second reinforcement panel can play a greater reinforcing role.

[0018] In some examples, the first reinforcement panel and the second reinforcement panel are arranged at an angle relative to each other, and the spacing between the first reinforcement panel and the second reinforcement panel gradually decreases from top to bottom. In this way, the rear longitudinal beam lower panel has more space to arrange other fixing members outside the mounting cylinder.

[0019] In some examples, the contact surface of the first cross beam with the inner side wall of the rear longitudinal beam is a first contact surface, the contact surface of the first reinforcement panel with the inner side wall of the rear longitudinal beam is a second contact surface, and the first contact surface and the second contact surface at least partially overlap. In this way, the first cross beam is not only connected to the first extension beam, but also connected to the first reinforcement panel, and the first cross beam, the first extension beam, and the first reinforcement panel can collectively form a stable force-bearing structure, and the strength and rigidity of the rear floor assembly are better.

[0020] In some examples, the second cross beam has a third contact surface with the inner side wall of the rear longitudinal beam, the second reinforcing plate has a fourth contact surface with the inner side wall of the rear longitudinal beam, and the third contact surface at least partially overlaps the fourth contact surface. In this way, the second cross beam, the second extension beam and the second reinforcing plate can form a stable force bearing structure.

[0021] In some examples, the rear longitudinal beam includes a rear longitudinal beam lower plate including a first lower plate and a second lower plate fixedly connected in a front-to-back direction along a longitudinal direction of the rear longitudinal beam, and the first opening is arranged on one of the first lower plate or the second lower plate.

[0022] In addition, the embodiments of the present application also provide a vehicle including the rear floor assembly described in the technical solutions. BRIEF DESCRIPTION OF DRAWINGS

[0023] FIG. 1 is a structural schematic diagram of a rear floor assembly according to an embodiment of the present application;

[0024] FIG. 2 is a structural schematic diagram of FIG. 1 with some parts removed;

[0025] FIG. 3 is a structural schematic diagram of a first cross beam according to an embodiment of the present application;

[0026] FIG. 4 is a lateral cross-sectional schematic diagram of a rear longitudinal beam at a shock absorber mounting position according to an embodiment of the present application;

[0027] FIG. 5 is a longitudinal cross-sectional schematic diagram of the rear longitudinal beam at the shock absorber mounting position according to an embodiment of the present application;

[0028] FIG. 6 is a partial enlarged schematic diagram of FIG. 5;

[0029] FIG. 7 is a structural schematic diagram of a mounting cylinder according to an embodiment of the present application;

[0030] FIG. 8 is a structural schematic diagram of a connection between a cross beam and an extension beam according to an embodiment of the present application;

[0031] FIG. 9 is a structural schematic diagram of a rear longitudinal beam lower plate according to an embodiment of the present application. Embodiments of the present application

[0032] This section will describe specific embodiments of the present application in detail, which are shown in the accompanying drawings. The drawings serve to supplement the description in the text part of the specification, enabling a person to intuitively and visually understand each technical feature and the overall technical solution of the present application. However, it cannot be understood as a limitation on the scope of protection of the present application.

[0033] In the description of the present application, it needs to be understood that the orientation description, such as the orientation or position relationship indicated by the upper, lower, front, rear, left, right and the like, is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In the description of the present application, if the first, second is described for the purpose of distinguishing technical features, it cannot be understood as indicating or implying the relative importance of the technical features indicated or implying the number of technical features indicated or implying the sequence of technical features indicated.

[0035] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0036] Referring to FIG. 1, a rear floor assembly of an embodiment of the present application is described, the rear floor assembly comprising a rear floor 1300, a pair of rear longitudinal beams 100 arranged on the left and right sides of the rear floor 1300, a mounting cylinder 200 mounted inside the rear longitudinal beams, and a connecting plate 300 connecting the rear longitudinal beams 100 and the mounting cylinder 200.

[0037] Specifically, the rear longitudinal beam 100 comprises a rear longitudinal beam upper plate 110, a rear longitudinal beam lower plate 120, a rear longitudinal beam outer side plate 130, and a rear longitudinal beam inner side plate 140. The rear longitudinal beam upper plate 110 is formed as a top wall of the rear longitudinal beam 100, the rear longitudinal beam lower plate 120 is formed as a bottom wall of the rear longitudinal beam 100, the rear longitudinal beam outer side plate 130 is formed as an outer side wall of the rear longitudinal beam 100, and the rear longitudinal beam inner side plate 140 is formed as an inner side wall of the rear longitudinal beam 100. In the present embodiment, the rear longitudinal beam upper plate 110 and the rear longitudinal beam inner side plate 140 are formed as an integrated stamping structure with an L-shaped transverse cross section. The rear longitudinal beam upper plate 110, the rear longitudinal beam lower plate 120, the rear longitudinal beam outer side plate 130, and the rear longitudinal beam inner side plate 140 form the rear longitudinal beam 100 into a hollow frame-shaped structure in cross section.

[0038] Here, it needs to be noted that the transverse cross section of the present embodiment refers to the cross section produced by cutting with a plane perpendicular to the length direction of the vehicle, and the length direction is the front-rear direction of the vehicle; the longitudinal cross section refers to the cross section produced by cutting with a plane perpendicular to the width direction of the vehicle, and the width direction is the left-right direction of the vehicle; and the vertical cross section refers to the cross section produced by cutting with a plane perpendicular to the surface of the rear floor.

[0039] The bottom wall of the rear side member 100 is provided with a first opening 121, and the mounting cylinder 200 is a bottom-end-opened cylindrical structure, the bottom end of which is connected to the first opening 121 of the bottom wall of the rear side member 100. In this way, the mounting cylinder 200 makes the rear side member 100 form an inner recessed cavity for accommodating a shock absorber integrated with a rear suspension spring. During vehicle assembly, the shock absorber is inserted into the mounting cylinder 200 from below the rear side member 100 for fixation. This arrangement allows the shock absorber to be installed in the height direction by using the internal space of the rear side member 100, which can meet the performance requirements of the rear suspension system and ensure the space of the trunk, i.e., the up-down direction. By connecting the first opening 121 of the bottom wall of the rear side member 100 to the cylindrical mounting cylinder 200, the mounting cylinder and the rear side member can still be enclosed in a closed cross section. It can be understood that the closed cross section has higher strength and rigidity than the open cross section. Therefore, by installing the shock absorber through the mounting cylinder 200, the influence on the strength and rigidity of the rear side member 100 can be reduced.

[0040] The mounting cylinder 200 and the rear side member lower plate 120 can be connected in a split body manner or integrally stamped and formed. In this embodiment, the mounting cylinder 200 and the rear side member lower plate 120 are connected in a split body manner, and the mounting cylinder 200 is also a split body structure. Specifically, the mounting cylinder 200 includes a top cover 210, two semicircular cylinder walls 220 butted together in the circumferential direction, and a ring-shaped fixing member 230 connecting the bottom ends of the cylinder walls 220 and the first opening 121 together. The fixing member 230 has an L-shaped cross section in the vertical direction, one end of which is connected to the cylinder wall 220 and the other end of which is connected to the rear side member lower plate 120. In some examples, the fixing member 230 is integrally stamped and formed to connect the two cylinder walls 220 and the rear side member lower plate 120, so that the stress of the mounting cylinder 200 and the rear side member lower plate 120 is more uniform, effectively reducing the stress concentration at the butt joint of the two cylinder walls 220. The top cover 210, the cylinder walls 220, and the fixing member 230 are stamped from a material having higher strength than the rear side member upper plate 110 and the rear side member lower plate 120, so that the vehicle can bear greater load.

[0041] The connecting plate 300 is fixed between the top of the mounting cylinder 200 and the top wall of the rear side member 100 and extends along the width direction of the rear side member 100. The connecting plate 300 can be fixedly connected to the mounting cylinder 200 and the top wall of the rear side member 100 by bolting or welding. The connecting plate 300 includes a fixed portion abuttingly connected to the top of the mounting cylinder 200 and an extension portion abuttingly connected to the inner surface of the top wall of the rear side member 100.

[0042] Referring to FIG. 2 and FIG. 4, the main body of the connecting plate 300 is a plate structure, and a stepped groove 350 is arranged at the approximate middle position of the connecting plate 300 to increase the strength of the connecting plate 300. The area of the connecting plate 300 other than the stepped groove 350 is an extension part, which is attached to the inner surface of the top wall of the rear longitudinal beam 100, and is beneficial to strength increase. The bottom of the stepped groove 350 is a fixed part, which is attached to the top of the mounting cylinder 200. The bottom of the stepped groove 350 and the top of the mounting cylinder 200 are both provided with mounting holes for mounting the shock absorber, and the mounting holes include a shock absorber insertion hole in the center and a plurality of bolt insertion holes around the shock absorber insertion hole. It can be understood that the stepped groove 350 can protrude upward toward the rear longitudinal beam, or can be recessed downward toward the rear longitudinal beam. In addition, in the present embodiment, the material strength of the connecting plate 300 is higher than that of the rear longitudinal beam 100. Compared with directly mounting the shock absorber on the rear longitudinal beam upper plate 110, the strength of the connecting plate 300 is increased to enable the rear longitudinal beam to withstand greater impact from the shock absorber. It can be understood that in other embodiments, the material strength of the connecting plate 300 can be reasonably adjusted according to the actual load.

[0043] According to the working characteristics of the shock absorber, the rear longitudinal beam 100 bears frequent vibration loads at the mounting position of the shock absorber, and relevant parts are prone to fatigue failure due to frequent vibration, such as loose screw connection, welding cracking, etc. The connecting plate 300 is clamped between the top of the mounting cylinder 200 and the top wall of the rear longitudinal beam 100. When the shock absorber impacts upward to exert an upward thrust on the connecting plate 300, the upward movement of the connecting plate 300 is blocked by the rear longitudinal beam upper plate 110 above it. When the shock absorber impacts downward to exert a downward pull on the connecting plate 300, the cylindrical structure of the mounting cylinder 200 has great rigidity, and the downward movement of the connecting plate 300 relative to the rear longitudinal beam upper plate 110 can be prevented by the mounting cylinder 200. That is, the connecting plate 300 can be stably connected with the rear longitudinal beam upper plate 110 and the mounting cylinder 200, thereby effectively ensuring the reliable connection of the connecting plate 300 with the rear longitudinal beam upper plate 110 and the mounting cylinder 200, and thereby ensuring the overall strength, rigidity and fatigue resistance of the rear longitudinal beam.

[0044] The position of the stepped groove 350 on the rear longitudinal beam upper plate 110 also has a second opening 111, which exposes the fixed part to the outside, thereby facilitating the installation and maintenance operation of the shock absorber, and enabling the rear longitudinal beam to be designed to be lightweight while meeting the strength requirements.

[0045] The embodiment of the present application sets the mounting cylinder 200 in the rear longitudinal beam, so that the mounting of the shock absorber can utilize the internal space of the rear longitudinal beam 100 in the height direction, both meeting the performance requirements of the rear suspension system and ensuring the space of the trunk. Meanwhile, the connecting plate 300 is arranged to increase the mounting strength of the shock absorber, and the connecting plate 300 is arranged between the top of the mounting cylinder 200 and the top wall of the rear longitudinal beam 100, which can effectively ensure the connecting strength of the connecting plate 300 and the rear longitudinal beam upper plate 110 and the mounting cylinder 200, and further improve the overall strength, stiffness and fatigue resistance of the rear longitudinal beam.

[0046] In some examples, the rear longitudinal beam upper plate 110 is formed with a rollover edge 112 upward on the outer side in the width direction, the rollover edge 112 is opposite to the rear longitudinal beam outer side plate 130, and the rollover edge 112 covers the edge of the rear longitudinal beam outer side plate 130 when the rear longitudinal beam upper plate 110 is connected with the rear longitudinal beam outer side plate 130. The connecting plate 300 is also formed with a first side edge 310 extending upward on the outer side in the width direction, and the first side edge 310 is fixed between the rollover edge 112 of the rear longitudinal beam upper plate 110 and the rear longitudinal beam outer side plate 130. That is, the connecting plate 300 forms a three-layer plate structure at the outer corner of the rear longitudinal beam upper plate 110 by extending the first side edge 310, which can improve the overall strength, stiffness and fatigue resistance of the rear longitudinal beam. Moreover, the first side edge 310 clamped between the rollover edge 112 of the rear longitudinal beam upper plate 110 and the rear longitudinal beam outer side plate 130 can also enhance the connecting strength of the connecting plate 300 and the rear longitudinal beam upper plate 110, effectively reducing the welding cracking or bolt connection loosening between the connecting plate 300 and the rear longitudinal beam upper plate 110.

[0047] The connecting plate 300 is also formed with a second side edge 320 extending downward on the inner side in the width direction, and the second side edge 320 is attached to the rear longitudinal beam inner side plate 140. That is, the connecting plate 300 forms a double-layer plate structure at the inner corner of the rear longitudinal beam upper plate 110 by extending the second side edge 320, which can improve the overall strength, stiffness and fatigue resistance of the rear longitudinal beam.

[0048] In some examples, the rear floor assembly further includes a cross beam group, a rear wheelhouse inner plate 1000 and a rear wheelhouse reinforcing plate 1100. The rear wheelhouse inner plate 1000 is connected to the outer side of the rear longitudinal beam 100, and the rear wheelhouse reinforcing plate 1100 is arranged on the inner side of the rear wheelhouse inner plate 1000 and extends along the up-down direction, and the rear wheelhouse reinforcing plate 1100 is used to increase the structural strength of the rear wheelhouse inner plate 1000. The cross beam group is arranged transversely 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 wheelhouse reinforcing plate 1100.

[0049] The beam groups include a first beam group arranged in front of the mounting cylinder 200 and a second beam group arranged behind the mounting cylinder 200. The first beam group includes a first beam 600, and the second beam group includes a second beam 700. Arranging the first beam group in front of the mounting cylinder 200 and the second beam group behind the mounting cylinder 200 can improve the strength and rigidity of the rear floor assembly, the rigidity including static rigidity and dynamic rigidity, the dynamic rigidity being a measure of the ability of the vehicle to resist deformation under dynamic loads, which is important for improving the ride comfort and driving stability of the vehicle.

[0050] The first beam group further includes a first extension beam 800, and the second beam group further includes a second extension beam 900. The first beam 600 is connected to the first extension beam 800 in the transverse direction, and the second beam 700 is connected to the second extension beam 900 in the transverse direction, to strengthen the strength and rigidity of the rear floor 1300 and the rear longitudinal beam 100.

[0051] Specifically, the first beam 600 is arranged above the rear floor 1300 and is clamped on the rear floor 1300 to form a beam structure with the rear floor 1300, the longitudinal cross section of which is substantially rectangular; the first extension beam 800 is arranged above the rear longitudinal beam 100 and is clamped on the rear longitudinal beam upper plate 110 to form a beam structure with the rear longitudinal beam upper plate 110, the longitudinal cross section of which is substantially rectangular. The first beam 600 and the first extension beam 800 are connected in the transverse direction to jointly strengthen the strength and rigidity of the rear floor 1300 and the rear longitudinal beam 100. The end of the first extension beam 800 towards the inner side is connected to the first beam 600, and the other end towards the outer side is connected to the rear wheel cover reinforcement plate 1100. In this way, the first beam 600, the first extension beam 800 and the rear wheel cover reinforcement plate 1100 form a continuous force transmission structure.

[0052] More specifically, the part of the first beam 600 extending in the width direction of the rear floor 1300 has a U-shaped flange shape in the vertical direction, i.e. the first beam 600 includes a U-shaped groove opening downward, and two flanges extending outward in the substantially horizontal direction along the edges of the lower opening end of the U-shaped groove, the flanges being arranged to fit the surface of the rear floor 1300.

[0053] In addition, the first cross beam 600 is also connected with the rear longitudinal beam inner side plate 140. The first cross beam 600 is provided with a connecting portion at the end of the left side and the right side, and the connecting portions on the two sides are connected with the rear longitudinal beams 100 on the two sides respectively. Taking the connecting portion on one side as an example, referring to FIG. 3, the first end of the U-shaped groove opposite to the rear longitudinal beam inner side plate 140 has a first edge 601 and a second edge 602 in the vertical direction, the first edge 601 and the second edge 602 are opposite to each other, the first edge 601 is formed with a front turn-up edge 603 facing the front direction and connected with the rear longitudinal beam inner side plate 140, and the second edge 602 is formed with a rear turn-up edge 604 facing the rear direction and connected with the rear longitudinal beam inner side plate 140. The first cross beam 600 is fixedly connected with the rear longitudinal beam inner side plate 140 through the front turn-up edge 603 and the rear turn-up edge 604. In some other embodiments, the connecting portion can also be realized in other structures to be fixedly connected with the rear longitudinal beam inner side plate 140.

[0054] The first extension beam 800 is arranged above the rear longitudinal beam 100, and covers a part of the width of the rear longitudinal beam upper plate 110. The vertical cross section of the first extension beam 800 is in the shape of a U-shaped groove with turn-up edges, that is, the first extension beam 800 includes a U-shaped groove with an opening facing downward, and turn-up edges extending outward along two edges of the opening end of the U-shaped groove. The turn-up edges are arranged to be attached to the rear longitudinal beam upper plate 110.

[0055] The first extension beam 800 is arranged above the rear longitudinal beam 100, and covers a part of the width of the rear longitudinal beam upper plate 110. The vertical cross section of the first extension beam 800 is in the shape of a U-shaped groove with turn-up edges, that is, the first extension beam 800 includes a U-shaped groove with an opening facing downward, and turn-up edges extending outward along two edges of the opening end of the U-shaped groove. The turn-up edges are arranged to be attached to the rear longitudinal beam upper plate 110.

[0056] In addition, referring to FIG. 8, the first extension beam 800 is provided with a first cross beam lap portion 810 extending above the first cross beam 600 at the inner side end in the width direction. The end of the first cross beam lap portion 810 is in the structure of a U-shaped groove with an opening facing downward, and the first cross beam lap portion 810 is buckled on the end of the first cross beam 600 to be fixedly connected with the first cross beam 600.

[0057] In addition, the first extension beam 800 is provided with a rear wheel cover first lap joint 820 extending upward at the outer end in the width direction, the end of the rear wheel cover first lap joint 820 comprises a U-shaped groove structure with an opening facing the rear wheel cover, and the rear wheel cover reinforcing plate 1100 is also provided with a U-shaped groove matched with the end U-shaped groove of the rear wheel cover first lap joint 820, and the U-shaped groove and the U-shaped groove are matched to fixedly connect the rear wheel cover reinforcing plate 1100 and the first extension beam 800.

[0058] The second cross beam 700 is arranged above the rear floor 1300 and covers the rear floor 1300 to form a beam structure with a substantially rectangular longitudinal section together with the rear floor 1300, and the second extension beam 900 is arranged above the rear longitudinal beam 100 and covers the rear longitudinal beam upper plate 110 to form a beam structure with a substantially rectangular longitudinal section together with the rear longitudinal beam upper plate 110. The second cross beam 700 and the second extension beam 900 are connected in the transverse direction to jointly strengthen the strength and rigidity of the rear floor 1300 and the rear longitudinal beam 100. One end of the second extension beam 900 towards the inner side is connected with the second cross beam 700, and the other end towards the outer side is connected with the rear wheel cover reinforcing plate 1100. In this way, the first cross beam 600, the first extension beam 800, and the rear wheel cover reinforcing plate 1100 form a continuous force transmission structure.

[0059] The structure of the second cross beam 700 is substantially the same as that of the first cross beam 600. The second cross beam 700 is also provided with a connecting part at the end of each of the left side and the right side to be connected with the rear longitudinal beam 100 on the two sides. The connecting part is also substantially the same as the connecting part of the first cross beam 600.

[0060] The second extension beam 900 is arranged above the rear longitudinal beam 100, and the part of the second extension beam 900 covering the width of the rear longitudinal beam upper plate 110 has a vertical section in the shape of a U-shaped strip with a flange, that is, the second extension beam 900 comprises a U-shaped groove with an opening facing downward, and a flange extending outward along each of the two edges of the opening end of the U-shaped groove. The flange is arranged to fit the rear longitudinal beam upper plate 110. The second extension beam 900 has a groove wall in the front, and the flange of the lower edge of the groove wall further extends forwardly as a second flange 930. The extension part of the connecting plate 300 comprises a rear extension plate 340 extending rearwardly, as shown in FIGS. 5 and 6. The second flange 930 extends forwardly to a length such that the second flange 930 and the rear extension plate 340 sandwich the rear longitudinal beam upper plate 110 therebetween. In some examples, the second flange 930 extends forwardly to the rear edge of the second opening 111. As viewed from the rear to the front, the second flange 930 first forms a double-layered plate structure with the rear longitudinal beam upper plate 110, and then, as viewed further to the rear, the second flange 930, the rear longitudinal beam upper plate 110, and the rear extension plate 340 form a three-layered plate structure from top to bottom, thereby improving the strength and rigidity of the rear longitudinal beam.

[0061] In addition, the second extension beam 900 is provided with a second cross beam lap portion 910 extending above the second cross beam 700 at the inner end in the width direction, and the end of the second cross beam lap portion 910 is an open downward U-shaped groove structure, which is clamped at the end of the second cross beam 700 to be fixedly connected with the second cross beam 700.

[0062] In addition, the second extension beam 900 is provided with a rear wheel cover second lap portion 920 extending upward at the outer end in the width direction, and the end of the rear wheel cover second lap portion 920 includes a U-shaped groove structure opening toward the rear wheel cover, and the rear wheel cover reinforcing plate 1100 is also provided with a U-shaped groove matched with the end U-shaped groove of the rear wheel cover second lap portion 920, and the U-shaped groove and the U-shaped groove are matched to fixedly connect the rear wheel cover reinforcing plate 1100 with the second extension beam 900.

[0063] As can be seen from the above, around the second opening 111 of the rear longitudinal beam upper plate 110, the first flange 830, the rear longitudinal beam upper plate 110, 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 rear longitudinal beam upper plate 110, and the rear extension plate 340 are stacked from top to bottom to form a three-layer plate structure. In this way, not only the strength and rigidity of the connection between the connecting plate 300 and the rear longitudinal beam can be increased, but also the overall strength and rigidity of the rear longitudinal beam can be improved.

[0064] In some examples, the first cross beam group further includes a third cross beam 610 arranged below the rear floor 1300, and the second cross beam group further includes a fourth cross beam 710 arranged below the rear floor 1300, the third cross beam 610 and the first cross beam 600 form an upper and lower corresponding reinforcing structure, and the fourth cross beam 710 and the second cross beam 700 form an upper and lower corresponding reinforcing structure, which can strengthen the strength and rigidity of the rear floor 1300 and the rear longitudinal beam 100.

[0065] In some examples, the first beam group further comprises a first reinforcing plate 400 arranged in the hollow interior of the rear longitudinal beam 100, and the second beam group further comprises a second reinforcing plate 500 arranged in the hollow interior of the rear longitudinal beam 100. The first reinforcing plate 400 is arranged 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 arranged 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 lateral cross section of the hollow frame of the rear longitudinal beam 100 is divided into two parts in the width direction, which reduces the torsional stiffness of the rear longitudinal beam at the shock absorber mounting position, and the arrangement of the laterally extending first reinforcing plate 400 and the second reinforcing plate 500 can compensate for the reduction of the torsional stiffness of the rear longitudinal beam at the shock absorber mounting position, and even enhance the torsional stiffness of the rear longitudinal beam at the shock absorber mounting position, depending on the structure or material selection of the first reinforcing plate 400 and the second reinforcing plate 500. After the arrangement of the first reinforcing plate 400 and the second reinforcing plate 500, the first reinforcing plate 400 and the second reinforcing plate 400 in the front-rear direction, the rear longitudinal beam upper plate 110 and the rear longitudinal beam lower plate 120 in the up-down direction, and the rear longitudinal beam inner side plate 140 and the rear longitudinal beam outer side plate 130 in the left-right side direction form a box-like structure around the mounting position of the shock absorber, which can enhance the stability of the rear longitudinal beam, and the first reinforcing plate 400 and the second reinforcing plate 500 can increase the lateral strength of the rear longitudinal beam, thereby compensating for or even improving the torsional stiffness of the rear longitudinal beam at the shock absorber mounting position.

[0066] In order to reliably connect the first reinforcing plate 400 to the rear longitudinal beam 100, the upper end edge of the first reinforcing plate 400 is provided with a fitting edge connected to the rear longitudinal beam upper plate 110, the lower end edge of the first reinforcing plate 400 is provided with a fitting edge connected to the rear longitudinal beam lower plate 120, and the inner side edge of the first reinforcing plate 400 is provided with a fitting edge connected to the rear longitudinal beam inner side plate 140. In the present embodiment, the fitting edge is a flange structure integrally formed with the first reinforcing plate 400. In some examples, reinforcing ribs are further arranged on the longitudinal face of the first reinforcing plate 400.

[0067] In order to reliably connect the second reinforcing plate 500 to the rear longitudinal beam 100, the upper end edge of the second reinforcing plate 500 is provided with a fitting edge connected to the rear longitudinal beam upper plate 110, the lower end edge of the second reinforcing plate 500 is provided with a fitting edge connected to the rear longitudinal beam lower plate 120, and the inner side edge of the second reinforcing plate 500 is provided with a fitting edge connected to the rear longitudinal beam inner side plate 140. In the present embodiment, the fitting edge is a flange structure integrally formed with the second reinforcing plate 500. In some examples, reinforcing ribs are further arranged on the longitudinal face of the second reinforcing plate 500.

[0068] In some examples, the first reinforcing plate 400 and the second reinforcing plate 500 are arranged obliquely, which can increase the area of the first reinforcing plate 400 and the second reinforcing plate 500, and thus play a greater reinforcing role. When observing the first reinforcing plate 400 and the second reinforcing plate 500 in the longitudinal section of the rear floor assembly, the first reinforcing plate 400 and the second reinforcing plate 500 are arranged at an angle relative to each other, and the distance between the first reinforcing plate 400 and the second reinforcing plate 500 gradually decreases from top to bottom. That is, the lower end of the first reinforcing plate 400 and the second reinforcing plate 500 is close to the mounting cylinder 200, and the upper end of the first reinforcing plate 400 and the second reinforcing plate 500 is away from the mounting cylinder 200. Such an arrangement allows the rear longitudinal beam lower plate 120 to have more space to arrange other components outside the mounting cylinder 200. Referring to FIG. 5, in the present embodiment, the rear longitudinal beam lower plate 120 is provided with a subframe fixing member 1200 behind the second reinforcing plate 500.

[0069] In some examples, the contact surface of the first cross beam 600 with the rear longitudinal beam inner side plate 140 is a first contact surface, the contact surface of the first reinforcing plate 400 with the rear longitudinal beam inner side plate 140 is a second contact surface, and the first contact surface and the second contact surface at least partially overlap.

[0070] In some examples, the contact surface of the second cross beam 700 with the rear longitudinal beam inner side plate 140 is a third contact surface, the contact surface of the second reinforcing plate 500 with the rear longitudinal beam inner side plate 140 is a fourth contact surface, and the third contact surface and the fourth contact surface at least partially overlap.

[0071] From the height direction, the first extension beam 800 is connected to the first cross beam 600 and is located above the first cross beam 600; the inner side edge of the first reinforcing plate 400 is connected to the rear longitudinal beam inner side plate 140, and the end of the first cross beam 600 is also connected to the rear longitudinal beam inner side plate 140. Due to the at least partial overlap of the first contact surface and the second contact surface, the first cross beam 600 is not only connected to the first extension beam 800, but also connected to the first reinforcing plate 400. In this way, the first cross beam 600, the first extension beam 800, and the first reinforcing plate 400 can jointly form a stable force structure, and the strength and rigidity of the rear floor assembly are better.

[0072] Similarly, the second cross beam 700, the second extension beam 900, and the second reinforcing plate 500 also constitute a stable force structure.

[0073] In some examples, the rear longitudinal beam lower plate 120 includes a first lower plate 122 and a second lower plate 123 arranged and fixedly connected along the longitudinal direction of the rear longitudinal beam 100, and the first opening 121 is arranged on one of the first lower plate 122 or the second lower plate 123. This facilitates the production of the rear longitudinal beam lower plate 120, and the first opening 121 is arranged on a complete plate, which can also ensure the connection strength between the mounting cylinder 200 and the rear longitudinal beam lower plate 120. In some examples, the lower ends of the first reinforcing plate 400 and the second reinforcing plate 500 are connected to the same lower plate, that is, the lower plate on which the first opening 121 is arranged.

[0074] In addition, the embodiments of the present application also provide a vehicle, which comprises the rear floor assembly described in any of the above embodiments.

[0075] The above describes the embodiments of the present application, but the present application is not limited to the above-described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A rear floor assembly, comprising: a rear longitudinal beam (100) in a hollow frame shape in cross section, a bottom wall of the rear longitudinal beam (100) being provided with a first opening (121) ; a mounting cylinder (200), a bottom end opening of the mounting cylinder (200) being connected with the first opening (121) to enable a shock absorber to be inserted from below the rear longitudinal beam (100) into the mounting cylinder (200) to be fixed; a connecting plate (300) being fixed between a top of the mounting cylinder (200) and a top wall of the rear longitudinal beam (100) and extending along a width direction of the rear longitudinal beam (100), the connecting plate (300) comprising a fixed portion connected with the top of the mounting cylinder (200) and an extending portion abutting an inner surface of the top wall of the rear longitudinal beam (100).

2. The rear floor assembly of claim 1, wherein, The rear longitudinal beam (100) comprises a rear longitudinal beam upper plate (110) and a rear longitudinal beam outer side plate (130), an upwardly turned side flange (112) being formed on an outer side of the rear longitudinal beam upper plate (110) in the width direction, the side flange (112) being opposite to the rear longitudinal beam outer side plate (130), a first side edge (310) being formed on an outer side of the connecting plate (300) in the width direction and extending upwardly, the first side edge (310) being fixed between the side flange (112) and the rear longitudinal beam outer side plate (130).

3. The rear floor assembly of claim 2, wherein, The rear longitudinal beam (100) comprises a rear longitudinal beam inner side plate (140), a second side edge (320) being formed on an inner side of the connecting plate (300) in the width direction and extending downwardly, the second side edge (320) abutting the rear longitudinal beam inner side plate (140).

4. The rear floor assembly of claim 1, wherein, The rear floor assembly further comprises a rear floor (1300), a first cross beam (600) and a second cross beam (700) transversely arranged above the rear floor (1300), the first cross beam (600) being arranged in front of the mounting cylinder (200), and the second cross beam (700) being arranged behind the mounting cylinder (200).

5. The rear floor assembly of claim 4, wherein, The rear floor assembly further comprises a first extension beam (800) and a second extension beam (900) transversely arranged above the rear longitudinal beam (100), the first extension beam (800) being arranged in front of the mounting cylinder (200), and an inner side end of the first extension beam (800) being connected with the first cross beam (600), the second extension beam (900) being arranged behind the mounting cylinder (200), and an inner side end of the second extension beam (900) being connected with the second cross beam (700).

6. The rear floor assembly of claim 5, wherein, The rear floor assembly further comprises a third cross beam (610) arranged in front of the mounting cylinder (200) and a fourth cross beam (710) arranged behind the mounting cylinder (200), the third cross beam (610) and the fourth cross beam (710) being arranged below the rear floor (1300).

7. The rear floor assembly of claim 5, wherein, The rear floor assembly further comprises a rear wheelhouse inner panel (1000) connected to the outer side of the rear longitudinal beam (100), and a rear wheelhouse reinforcement panel (1100) disposed on the inner side of the rear wheelhouse inner panel (1000) and extending in the up-down direction, the other end of the first extension beam (800) toward the outer side being connected to the rear wheelhouse reinforcement panel (1100), and the other end of the second extension beam (900) toward the outer side being connected to the rear wheelhouse reinforcement panel (1100).

8. The rear floor assembly of claim 5, wherein, The first extension beam (800) has a first flange (830) extending rearward, and the first flange (830), the top wall of the rear longitudinal beam (100), and the extension part of the mounting cylinder (200) are stacked from top to bottom; the second extension beam (900) has a second flange (930) extending forward, and the second flange (930), the top wall of the rear longitudinal beam (100), and the extension part of the mounting cylinder (200) are stacked from top to bottom.

9. The rear floor assembly of claim 5, wherein, The hollow interior of the rear longitudinal beam (100) is provided with a first reinforcement panel (400) in front of the mounting cylinder (200) and a second reinforcement panel (500) behind the mounting cylinder (200), and the first reinforcement panel (400) and the second reinforcement panel (500) are both disposed transversely in the width direction of the rear longitudinal beam (100).

10. The rear floor assembly of claim 9, wherein, The first reinforcement panel (400) and the second reinforcement panel (500) are both arranged obliquely.

11. The rear floor assembly of claim 10, wherein, The first reinforcement panel (400) and the second reinforcement panel (500) are arranged at an included angle relative to each other, and the spacing between the first reinforcement panel (400) and the second reinforcement panel (500) gradually decreases from top to bottom.

12. The rear floor assembly of claim 11, wherein, The contact surface of the first cross beam (600) with the inner side wall of the rear longitudinal beam (100) is a first contact surface, the contact surface of the first reinforcement panel (400) with the inner side wall of the rear longitudinal beam (100) is a second contact surface, and the first contact surface and the second contact surface at least partially overlap.

13. The rear floor assembly of claim 11, wherein, The contact surface of the second cross beam (700) with the inner side wall of the rear longitudinal beam (100) is a third contact surface, the contact surface of the second reinforcement panel (500) with the inner side wall of the rear longitudinal beam (100) is a fourth contact surface, and the third contact surface and the fourth contact surface at least partially overlap.

14. The rear floor assembly of any of claims 1-13, wherein, The rear longitudinal beam (100) comprises a rear longitudinal beam lower panel (120), the rear longitudinal beam lower panel (120) comprising a first lower panel (122) and a second lower panel (123) disposed front and back along the longitudinal direction of the rear longitudinal beam (100) and fixedly connected, and the first opening (121) is disposed on one of the first lower panel (122) or the second lower panel (123).

15. A vehicle comprising the rear floor assembly according to any one of claims 1 to 14.

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