Rear floor assembly and vehicle

Abstract

The invention 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 the rear longitudinal beam is in a hollow frame shape, and a first opening is formed in the bottom wall of the rear longitudinal beam. An opening in the bottom end of the mounting cylinder is connected with the first opening, so that the shock absorber is inserted into the mounting cylinder from the lower part of the rear longitudinal beam to be fixed; the connecting plate is fixedly arranged between the top of the mounting cylinder and the top wall of the rear longitudinal beam and extends in the width direction of the rear longitudinal beam, and the connecting plate comprises a fixing part connected with the top of the mounting cylinder in an attached mode and an extending part attached to the inner surface of the top wall of the rear longitudinal beam. The mounting cylinder is mounted on the bottom wall of the rear longitudinal beam, the performance requirement of a rear suspension system can be met, the space of a trunk can be guaranteed, the connecting plate is arranged between the top of the mounting cylinder and the top wall of the rear longitudinal beam, and the overall strength, rigidity and fatigue resistance of the rear longitudinal beam can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a rear floor assembly and a vehicle. Background Art

[0002] With the advancement of technology and the improvement of consumers' quality of life, people have higher and higher requirements for vehicle space, comfort and reliability. Among them, the size of the trunk space is an important indicator. For the rear suspension system with a spring-shock separation design commonly seen on the market, the arrangement of the shock absorber encroaches on the trunk space of the vehicle body, making the trunk width narrower. The use of combining the shock absorber with the rear suspension spring and arranging it under the floor can meet the demand for a wider trunk, but the rear suspension spring and shock absorber require a certain height to achieve the performance of the rear suspension system itself, and if they are directly fixed under the rear longitudinal beam to ensure the rigidity and strength of the vehicle body, the rear longitudinal beam needs to be raised, and raising the height of the longitudinal beam will also encroach on the height of the trunk, making the trunk space smaller. Summary of the invention

[0003] The object of the present invention is to provide a rear floor assembly and a vehicle to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The technical solutions adopted to solve the above technical problems are: First, the present invention provides a rear floor assembly, including a rear longitudinal beam, which has a hollow frame-shaped cross-section, and a first opening is provided on the bottom wall of the rear longitudinal beam; a mounting tube, the bottom end opening of the mounting tube is connected to the first opening, so that a shock absorber can be inserted into the mounting tube from the bottom of the rear longitudinal beam and fixed; a connecting plate, the connecting plate is fixedly arranged between the top of the mounting tube and the top wall of the rear longitudinal beam, and extends along the width direction of the rear longitudinal beam, and the connecting plate includes a fixing portion that is fitted and connected to the top of the mounting tube, and an extending portion that is fitted to the inner surface of the top wall of the rear longitudinal beam.

[0005] The beneficial effects of the present invention are as follows: the mounting tube is mounted on the bottom wall of the rear longitudinal beam, so that the shock absorber can be mounted using the internal space of the rear longitudinal beam in the height direction, which can meet the performance requirements of the rear suspension system and ensure the space of the luggage compartment. A connecting plate is provided to mount the mounting tube, and different loads can be easily matched by adjusting the strength of the connecting plate. Moreover, the connecting plate is arranged between the top of the mounting tube and the top wall of the rear longitudinal beam, which can effectively prevent the connection of the connecting plate from being loosened, and the reliable connection of the connecting plate is conducive to ensuring the overall strength, rigidity and fatigue resistance of the rear longitudinal beam.

[0006] As a further improvement of the above technical solution, the rear longitudinal beam includes an upper plate of the rear longitudinal beam and an outer plate of the rear longitudinal beam, the upper plate of the rear longitudinal beam is formed with a side flange facing upward on the outer side in the width direction, the side flange is opposite to the outer plate of the rear longitudinal beam, and the connecting plate is formed with a first side edge facing upward on the outer side in the width direction, the first side edge is fixed between the side flange and the outer plate of the rear longitudinal beam. In this way, a three-layer plate structure is formed at the outer corner of the upper plate of the rear longitudinal beam, which can further improve the overall strength, rigidity, and fatigue resistance of the rear longitudinal beam. The first side edge is sandwiched between the side flange of the upper plate of the rear longitudinal beam and the outer plate of the rear longitudinal beam, which can enhance the connection strength between the connecting plate and the upper plate of the rear longitudinal beam, and effectively reduce the welding cracking or loosening of the bolt connection between the connecting plate and the upper plate of the rear longitudinal beam.

[0007] As a further improvement of the above technical solution, the rear longitudinal beam includes an inner side plate of the rear longitudinal beam, and the connecting plate is formed with a second side edge extending downward on the inner side in the width direction, and the second side edge is attached to the inner side plate of the rear longitudinal beam. In this way, a double-layer plate structure is formed at the inner corner of the upper plate of the rear longitudinal beam, further improving the overall strength, rigidity, and fatigue resistance of the rear longitudinal beam.

[0008] As a further improvement of the above technical solution, the rear floor assembly further includes a rear floor, a first crossbeam and a second crossbeam transversely arranged above the rear floor; the first crossbeam is arranged in front of the mounting tube, and the second crossbeam is arranged behind the mounting tube. In this way, the strength and rigidity of the rear floor assembly can be improved.

[0009] As a further improvement of the above technical solution, 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 tube, and one end of the first extension beam facing inward is connected to the first cross beam; the second extension beam is arranged behind the mounting tube, and one end of the second extension beam facing inward is connected to the second cross beam. In this way, the strength and rigidity of the rear floor assembly can be improved.

[0010] As a further improvement of the above technical solution, the rear floor assembly also includes a third cross beam arranged in front of the mounting tube and a fourth cross beam arranged behind the mounting tube, and the third cross beam and the fourth cross beam are both arranged below the rear floor.

[0011] As a further improvement of the above technical solution, the rear floor assembly also includes a rear wheel housing inner panel and a rear wheel housing reinforcement plate. The rear wheel housing inner panel is connected to the outer side of the rear longitudinal beam. The rear wheel housing reinforcement plate is arranged on the inner side of the rear wheel housing inner panel and extends in the up and down directions. The other end of the first extension beam facing outward is connected to the rear wheel housing reinforcement plate, and the other end of the second extension beam facing outward is connected to the rear wheel housing reinforcement plate.

[0012] As a further improvement of the above technical solution, the first extension beam has a first flange extending backwards, and the first flange, the top wall of the rear longitudinal beam, and the extension of the mounting tube are stacked from top to bottom; the second extension beam has a second flange extending forwards, and the second flange, the top wall of the rear longitudinal beam, and the extension of the mounting tube are stacked from top to bottom. This can not only increase the strength and rigidity of the connection between the connecting plate and the rear longitudinal beam, but also improve the strength and rigidity of the entire rear longitudinal beam.

[0013] As a further improvement of the above technical solution, a first reinforcing plate is provided in front of the mounting tube in the hollow interior of the rear longitudinal beam, and a second reinforcing plate is provided behind the mounting tube, and the first reinforcing plate and the second reinforcing plate are both arranged transversely 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 by the mounting tube in the width direction, this division will reduce the torsional rigidity of the rear longitudinal beam at the shock absorber mounting position, and the provision of the transversely extending first reinforcing plate and the second reinforcing plate can compensate for the reduction of the torsional rigidity of the rear longitudinal beam at the shock absorber mounting position.

[0014] As a further improvement of the above technical solution, the first reinforcing plate and the second reinforcing plate are both arranged obliquely. The oblique arrangement can increase the area of ​​the first reinforcing plate and the second reinforcing plate, so that the first reinforcing plate and the second reinforcing plate can play a greater reinforcing role.

[0015] As a further improvement of the above technical solution, the first reinforcing plate and the second reinforcing plate are arranged at an angle relative to each other, and the distance between the first reinforcing plate and the second reinforcing plate gradually decreases from top to bottom, so that the lower plate of the rear longitudinal beam has more space for arranging other fixing parts in the area outside the mounting tube.

[0016] As a further improvement of the above technical solution, the contact surface between the first cross beam and the inner side wall of the rear longitudinal beam is the first contact surface, the contact surface between the first reinforcing plate and the inner side wall of the rear longitudinal beam is the 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 to the first reinforcing plate. The first cross beam, the first extension beam, and the first reinforcing plate can jointly form a stable force-bearing structure, and the strength and rigidity of the rear floor assembly are better.

[0017] As a further improvement of the above technical solution, the contact surface between the second cross beam and the inner side wall of the rear longitudinal beam is the third contact surface, the contact surface between the second reinforcing plate and the inner side wall of the rear longitudinal beam is the fourth contact surface, and the third contact surface and the fourth contact surface at least partially overlap. In this way, the second cross beam, the second extension beam, and the second reinforcing plate can form a stable force-bearing structure.

[0018] As a further improvement of the above technical solution, the rear longitudinal beam includes a rear longitudinal beam lower plate, and the rear longitudinal beam lower plate includes a first lower plate and a second lower plate arranged front and rear along the longitudinal direction of the rear longitudinal beam and fixedly connected, and the first opening is arranged on one of the first lower plate or the second lower plate.

[0019] In addition, the present invention also provides a vehicle, which includes the rear floor assembly described in the above technical solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a rear floor assembly according to an embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the structure after removing some parts; Figure 3 is a schematic structural diagram of a first crossbeam according to an embodiment of the present invention; Figure 4 is a schematic transverse cross-sectional view of a rear longitudinal beam at a shock absorber installation position according to an embodiment of the present invention; Figure 5 is a longitudinal cross-sectional schematic diagram of a rear longitudinal beam at a shock absorber installation position of an embodiment of the present invention (some parts are not shown); Figure 6 yes Figure 5 A partial enlarged schematic diagram of Figure 7 is a schematic structural diagram of a mounting tube according to an embodiment of the present invention; Figure 8 is a schematic structural diagram of the connection between the cross beam and the extension beam according to an embodiment of the present invention; Fig. 9 1 is a schematic structural diagram of a rear longitudinal beam lower plate according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Reference Figure 1 , describing a rear floor assembly of an embodiment of the present invention, the rear floor assembly includes 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 tube 200 installed inside the rear longitudinal beam, and a connecting plate 300 connecting the rear longitudinal beam 100 and the mounting tube 200.

[0026] Specifically, the rear longitudinal beam 100 includes a rear longitudinal beam upper plate 110, a rear longitudinal beam lower plate 120, a rear longitudinal beam outer plate 130, and a rear longitudinal beam inner 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 plate 130 is formed as an outer wall of the rear longitudinal beam 100, and the rear longitudinal beam inner plate 140 is formed as an inner wall of the rear longitudinal beam 100. In this embodiment, the rear longitudinal beam upper plate 110 and the rear longitudinal beam inner plate 140 are formed as an integral 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 plate 130, and the rear longitudinal beam inner plate 140 enable the rear longitudinal beam 100 to form a structure with a hollow frame shape in cross section.

[0027] It should be noted here that the transverse cross-section of this 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 also the front-to-back 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 also the left-to-right direction of the vehicle; the vertical cross-section refers to the cross-section produced by cutting with a plane perpendicular to the rear floor surface.

[0028] The bottom wall of the rear longitudinal beam 100 is provided with a first opening 121. The installation tube 200 is a cylindrical structure with an opening at the bottom end, and its bottom end opening is connected to the first opening 121 of the bottom wall of the rear longitudinal beam 100. In this way, the installation tube 200 forms an inner concave cavity in the rear longitudinal beam 100, and the inner concave cavity is used to accommodate the shock absorber integrated with the rear suspension spring. When the vehicle is assembled, the shock absorber is inserted into the installation tube 200 from the bottom of the rear longitudinal beam 100 for fixing. This arrangement allows the installation of the shock absorber in the height direction to utilize the internal space of the rear longitudinal beam 100, which can meet the performance requirements of the rear suspension system and ensure the space of the luggage compartment. The height direction is also the up and down direction. By providing a first opening 121 on the bottom wall of the rear longitudinal beam 100 to connect with the cylindrical mounting tube 200, the mounting tube and the rear longitudinal beam can still be enclosed to form a closed section. It can be understood that the closed section has higher strength and rigidity than the open section. Therefore, by installing the shock absorber through the mounting tube 200, the influence on the strength and rigidity of the rear longitudinal beam 100 can be reduced.

[0029] The mounting tube 200 and the rear longitudinal beam lower plate 120 can be connected in a split manner or in an integral stamping structure. In the present embodiment, the mounting tube 200 and the rear longitudinal beam lower plate 120 are connected in a split manner, and the mounting tube 200 is also a split structure. Specifically, the mounting tube 200 includes a top cover 210, and two semi-arc cylinder walls 220 butted together in the circumferential direction, and also includes an annular fixing member 230 that connects the bottom end of the cylinder wall 220 and the first opening 121 together, and 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 is connected to the rear longitudinal beam lower plate 120. Further, the fixing member 230 is integrally stamped to connect the two cylinder walls 220 and the rear longitudinal beam lower plate 120, so that the force of the mounting tube 200 and the rear longitudinal beam lower plate 120 is more uniform, and the stress concentration at the butt joint of the two cylinder walls 220 is effectively reduced. The top cover 210 , the tube wall 220 , and the fixing member 230 are all stamped out of a material having a higher strength than the rear longitudinal beam upper plate 110 and the rear longitudinal beam lower plate 120 , so that the vehicle can withstand a greater load.

[0030] The connecting plate 300 is fixedly arranged between the top of the mounting tube 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 tube 200 and the top wall of the rear longitudinal beam 100 by bolt connection or welding. The connecting plate 300 includes a fixing portion that is bonded to the top of the mounting tube 200, and an extending portion that is bonded to the inner surface of the top wall of the rear longitudinal beam 100.

[0031] Reference Figure 2 and Figure 4As shown, the main body of the connecting plate 300 is a plate-like structure, and a step groove 350 is provided 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 step groove 350 is an extension portion, which fits with the inner surface of the top wall of the rear longitudinal beam 100, which is conducive to increasing the strength; the bottom of the step groove 350 is a fixing portion, which fits with the top of the mounting tube 200. The bottom of the step groove 350 and the top of the mounting tube 200 are both provided with mounting holes for mounting the shock absorber, and the mounting holes include a shock absorber insertion hole located in the center and several bolt insertion holes located around the shock absorber insertion hole. It can be understood that the step groove 350 can be protruding toward the top of the rear longitudinal beam, or can be recessed toward the bottom of the rear longitudinal beam. In addition, in this 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 rear longitudinal beam can withstand a greater impact from the shock absorber by increasing the strength of the connecting plate 300. It is understood that in other embodiments, the material strength of the connecting plate 300 can be reasonably adjusted according to the actual load.

[0032] According to the working characteristics of the shock absorber, the rear longitudinal beam 100 is subjected to frequent vibration loads at the installation position of the shock absorber, and related parts are easily fatigued and damaged due to frequent vibrations, such as loose screw connections, cracked welds, and the like. The connecting plate 300 is clamped between the top of the mounting tube 200 and the top wall of the rear longitudinal beam 100. When the shock absorber impacts upward to apply an upward thrust to the connecting plate 300, the upward movement tendency of the connecting plate 300 is blocked by the rear longitudinal beam upper plate 110 located above it; when the shock absorber impacts downward to apply a downward pulling force to the connecting plate 300, the cylindrical structure of the mounting tube 200 has a large rigidity, and the downward movement tendency of the connecting plate 300 relative to the rear longitudinal beam upper plate 110 can be blocked by the mounting tube 200, that is, the connecting plate 300 can be firmly connected to the rear longitudinal beam upper plate 110 and the mounting tube 200, thereby effectively ensuring the reliable connection between the connecting plate 300 and the rear longitudinal beam upper plate 110 and the mounting tube 200, thereby ensuring the overall strength, rigidity and fatigue resistance of the rear longitudinal beam.

[0033] A second opening 111 is also provided on the rear longitudinal beam upper plate 110 at a position corresponding to the step groove 350 of the connecting plate 300. The second opening 111 exposes the fixing portion to the outside, which is convenient for the installation and maintenance of the shock absorber and enables the rear longitudinal beam to be lightweight while meeting the strength requirements.

[0034] The embodiment of the present invention arranges the installation tube 200 in the rear longitudinal beam, so that the installation of the shock absorber can utilize the internal space of the rear longitudinal beam 100 in the height direction, which can meet the performance requirements of the rear suspension system and ensure the space of the luggage box. At the same time, the connection plate 300 is arranged to increase the installation strength of the shock absorber. The connection plate 300 is arranged between the top of the installation tube 200 and the top wall of the rear longitudinal beam 100, which can effectively ensure the connection strength between the connection plate 300 and the upper plate 110 of the rear longitudinal beam and the installation tube 200, thereby improving the overall strength, rigidity, and fatigue resistance of the rear longitudinal beam.

[0035] Furthermore, the rear longitudinal beam upper plate 110 is formed with a side flange 112 facing upward on the outer side in the width direction, and the side flange 112 is opposite to the rear longitudinal beam outer plate 130. When the rear longitudinal beam upper plate 110 is connected to the rear longitudinal beam outer plate 130, the side flange 112 covers the edge of the rear longitudinal beam outer 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 side flange 112 of the rear longitudinal beam upper plate 110 and the rear longitudinal beam outer plate 130. In other words, 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 further improve the overall strength, rigidity, and fatigue resistance of the rear longitudinal beam. In addition, the first side edge 310 clamped between the side flange 112 of the rear longitudinal beam upper plate 110 and the rear longitudinal beam outer plate 130 can also enhance the connection strength between the connecting plate 300 and the rear longitudinal beam upper plate 110, and effectively reduce the welding cracking or bolt connection loosening between the connecting plate 300 and the rear longitudinal beam upper plate 110.

[0036] 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 inner side plate 140 of the rear longitudinal beam. In other words, the connecting plate 300 forms a double-layer plate structure at the inner corner of the upper plate 110 of the rear longitudinal beam by extending the second side edge 320, which can improve the overall strength, rigidity, and fatigue resistance of the rear longitudinal beam.

[0037] Furthermore, the rear floor assembly further includes a crossbeam group, a rear wheel housing inner plate 1000, and a rear wheel housing reinforcement plate 1100. The rear wheel housing inner plate 1000 is connected to the outer side of the rear longitudinal beam 100, the rear wheel housing reinforcement plate 1100 is arranged inside the rear wheel housing inner plate 1000 and extends in the up-down direction, and the rear wheel housing reinforcement plate 1100 is used to increase the structural strength of the rear wheel housing inner plate 1000. The crossbeam group is arranged transversely along the width direction of the rear floor 1300 to connect a pair of rear longitudinal beams 100 and the rear wheel housing reinforcement plate 1100 on the left and right sides of the rear floor 1300.

[0038] The cross beam group includes a first cross beam group arranged in front of the mounting cylinder 200, and a second cross beam group arranged in the rear of the mounting cylinder 200. The first cross beam group includes a first cross beam 600, and the second cross beam group includes a second cross beam 700. The first cross beam group and the second cross beam group are arranged in front of and behind the mounting cylinder 200, respectively, so as to improve the strength and rigidity of the rear floor assembly. The rigidity includes static rigidity and dynamic rigidity. The dynamic rigidity is a measure of the ability of the vehicle to resist deformation under dynamic load, which is very important for improving the ride comfort and driving stability of the vehicle.

[0039] The first cross beam group further includes a first extension beam 800, and the second cross beam group further includes a second extension beam 900. The first cross beam 600 is connected to the first extension beam 800 in the transverse direction, and the second cross beam 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.

[0040] Specifically, the first cross beam 600 is arranged above the rear floor 1300, and the first cross beam 600 is pressed on the rear floor 1300 to form a beam structure with a substantially rectangular longitudinal section together with the rear floor 1300; the first extension beam 800 is arranged above the rear longitudinal beam 100, and the first extension beam 800 is pressed on 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 first cross 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. One end of the first extension beam 800 facing the inner side is connected to the first cross beam 600, and the other end facing the outer side is connected to the rear wheel housing reinforcement plate 1100. In this way, the first cross beam 600, the first extension beam 800, and the rear wheel housing reinforcement plate 1100 form a continuous force transmission structure.

[0041] More specifically, the portion of the first cross beam 600 extending in the width direction of the rear floor 1300 has a vertical cross section that is U-shaped with a flange, that is, the first cross beam 600 includes a U-shaped groove opening toward the bottom, and flanges extending outward in a substantially horizontal direction along two edges of the open end below the U-shaped groove, and the flanges are configured to fit the surface of the rear floor 1300.

[0042] In addition, the first cross beam 600 is also connected to the inner side plate 140 of the rear longitudinal beam. The first cross beam 600 is provided with connecting parts at the left and right ends, and the connecting parts on both sides are respectively connected to the rear longitudinal beams 100 on both sides. 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 the vertical direction, the first side 601 and the second side 602 are opposite, the first side 601 is formed with a front flange 603 facing forward to fit and connect with the inner side plate 140 of the rear longitudinal beam, and the second side 602 is formed with a rear flange 604 facing backward to fit and connect with 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 other embodiments, the connection portion can also adopt other structures to achieve fixed connection with the inner side plate 140 of the rear longitudinal beam.

[0043] The first extension beam 800 is arranged above the rear longitudinal beam 100. The first extension beam 800 covers the width of the rear longitudinal beam upper plate 110. The vertical cross-section is a U-shaped shape with a flange, that is, the first extension beam 800 includes a U-shaped groove opening toward the bottom, and flanges extending outward along two edges of the lower open end of the U-shaped groove, and the flanges are arranged to fit the rear longitudinal beam upper plate 110.

[0044] The first extension beam 800 is located at the rear groove wall, and the flange of the lower edge of the first extension beam 800 further extends backward to form a first flange 830. The extension portion of the connecting plate 300 includes a front extension plate 330 extending forward. Figure 5 and Figure 6 As shown, the first flange 830 extends backwards to such a length that the first flange 830 and the front extension plate 330 sandwich the rear longitudinal beam upper plate 110. Preferably, the first flange 830 extends backwards until it reaches the front edge of the second opening 111. From the front to the back, the first flange 830 is first stacked with the rear longitudinal beam upper plate 110 to form a double-layer plate structure, and then 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, which can improve the strength and rigidity of the rear longitudinal beam.

[0045] In addition, refer to Figure 8 As shown, the first extension beam 800 is provided with a first beam lap joint 810 extending to above the first beam 600 at the inner end in the width direction, and the end of the first beam lap joint 810 is a U-shaped groove structure with an opening facing downward. The first beam lap joint 810 is buckled on the end of the first beam 600 to be fixedly connected to the first beam 600.

[0046] In addition, a first lap joint portion 820 for the rear wheel cover extending upward is provided at the outer end portion in the width direction of the first extension beam 800, and the end of the first lap joint portion 820 for the rear wheel cover includes a U-shaped groove structure opening toward the rear wheel cover, and a U-shaped groove matching with the end U-shaped groove of the first lap joint portion 820 for the rear wheel cover is also provided on the rear wheel cover reinforcement plate 1100, and the U-shaped grooves match with each other to fix the rear wheel cover reinforcement plate 1100 to the first extension beam 800.

[0047] The second cross beam 700 is arranged above the rear floor 1300, and is pressed on the rear floor 1300 to form a beam structure with a substantially rectangular longitudinal section together with the rear floor 1300; the second extension beam 900 is arranged above the rear longitudinal beam 100, and is pressed on 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 facing the inner side is connected to the second cross beam 700, and the other end facing the outer side is connected to the rear wheel housing reinforcement plate 1100. In this way, the first cross beam 600, the first extension beam 800, and the rear wheel housing reinforcement plate 1100 form a continuous force transmission structure.

[0048] 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 connecting parts at the left and right ends thereof, respectively connected to the rear longitudinal beams 100 on both sides. The connecting parts thereof are also substantially the same in structure as the connecting parts of the first cross beam 600.

[0049] The second extension beam 900 is arranged above the rear longitudinal beam 100. The second extension beam 900 covers the width of the rear longitudinal beam upper plate 110. Its vertical cross section is a U-shaped shape with flanges, that is, the second extension beam 900 includes a U-shaped groove opening toward the bottom, and flanges extending outward along the two edges of the lower open end of the U-shaped groove, and the flanges are arranged to fit the rear longitudinal beam upper plate 110. The second extension beam 900 is located at the front groove wall, and the flange at the lower edge thereof also extends forward with a second flange 930. The extension portion of the connecting plate 300 includes a rear extension plate 340 extending toward the rear, referring to Figure 5 and Figure 6 As shown, the second flange 930 extends forward to such a length that the second flange 930 and the rear extension plate 340 sandwich the rear longitudinal beam upper plate 110. Preferably, the second flange 930 extends forward until it reaches the rear edge of the second opening 111. Looking from the back to the front, the second flange 930 is first stacked with the rear longitudinal beam upper plate 110 to form a double-layer plate structure, and then further backward, 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, which can improve the strength and rigidity of the rear longitudinal beam.

[0050] In addition, the second extension beam 900 is provided with a second beam lap joint 910 extending to the top of the second beam 700 at the inner end in the width direction. The end of the second beam lap joint 910 is a U-shaped groove structure with an opening facing downward. The second beam lap joint 910 is buckled on the end of the second beam 700 to be fixedly connected to the second beam 700.

[0051] In addition, the second extension beam 900 is provided with an upwardly extending rear wheel cover second lap joint 920 at the outer end in the width direction, and the end of the rear wheel cover second lap joint 920 includes a U-shaped groove structure opening toward the rear wheel cover, and the rear wheel cover reinforcement plate 1100 is also provided with a U-shaped groove that matches the end U-shaped groove of the rear wheel cover second lap joint 920, and the U-shaped grooves cooperate with each other to fix the rear wheel cover reinforcement plate 1100 to the second extension beam 900.

[0052] 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. This can not only increase the strength and rigidity of the connection between the connecting plate 300 and the rear longitudinal beam, but also improve the strength and rigidity of the entire rear longitudinal beam.

[0053] Furthermore, the first cross beam group also includes a third cross beam 610 arranged below the rear floor 1300, and the second cross beam group also includes a fourth cross beam 710 arranged below the rear floor 1300. The third cross beam 610 and the first cross beam 600 form a corresponding reinforcement structure up and down, and the fourth cross beam 710 and the second cross beam 700 form a corresponding reinforcement structure up and down, which can further enhance the strength and rigidity of the rear floor 1300 and the rear longitudinal beam 100.

[0054] Further, the first cross beam group further includes a first reinforcing plate 400 disposed in the hollow interior of the rear longitudinal beam 100, and the second cross beam group further includes a second reinforcing plate 500 disposed in the hollow interior of the rear longitudinal beam 100. The first reinforcing plate 400 is disposed in front of the mounting cylinder 200 and extends transversely in the width direction of the rear longitudinal beam 100, and the second reinforcing plate 500 is disposed in the rear of the mounting cylinder 200 and extends transversely 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, and this division will reduce the torsional rigidity of the rear longitudinal beam at the shock absorber installation position, while the transversely extending first reinforcing plate 400 and second reinforcing plate 500 can compensate for the weakening of the torsional rigidity of the rear longitudinal beam at the shock absorber installation position, and even enhance the torsional rigidity of the rear longitudinal beam at the shock absorber installation position, which depends 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 provided, the first reinforcing plate 400 and the second reinforcing plate 500 located in the front-to-rear direction, the rear longitudinal beam upper plate 110 and the rear longitudinal beam lower plate 120 located in the up-down direction, and the rear longitudinal beam inner plate 140 and the rear longitudinal beam outer plate 130 located in the left-right direction enable the rear longitudinal beam to form a box-shaped structure around the installation position of the shock absorber. This structure can enhance the stability of the rear longitudinal beam, especially 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 installation position of the shock absorber.

[0055] In order to reliably connect the first reinforcing plate 400 to the rear longitudinal beam 100, the upper edge of the first reinforcing plate 400 is provided with a fitting edge connected to the upper plate 110 of the rear longitudinal beam, the lower edge of the first reinforcing plate 400 is provided with a fitting edge connected to the lower plate 120 of the rear longitudinal beam, and the inner edge of the first reinforcing plate 400 is provided with a fitting edge connected to the inner plate 140 of the rear longitudinal beam. In this embodiment, the fitting edge is a flange structure integrally formed with the first reinforcing plate 400. Furthermore, a reinforcing rib is also provided on the longitudinal surface of the first reinforcing plate 400.

[0056] In order to reliably connect the second reinforcing plate 500 to the rear longitudinal beam 100, the upper edge of the second reinforcing plate 500 is provided with a fitting edge connected to the upper plate 110 of the rear longitudinal beam, the lower edge of the second reinforcing plate 500 is provided with a fitting edge connected to the lower plate 120 of the rear longitudinal beam, and the inner edge of the second reinforcing plate 500 is provided with a fitting edge connected to the inner plate 140 of the rear longitudinal beam. In this embodiment, the above-mentioned fitting edge is a flange structure integrally formed with the second reinforcing plate 500. Furthermore, a reinforcing rib is also provided on the longitudinal surface of the second reinforcing plate 500.

[0057] Furthermore, the first reinforcing plate 400 and the second reinforcing plate 500 are arranged at an angle, and the inclined arrangement can increase the area of ​​the first reinforcing plate 400 and the second reinforcing plate 500, and can also play a greater reinforcing role. 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 spacing between the first reinforcing plate 400 and the second reinforcing plate 500 gradually decreases from top to bottom. In other words, the lower ends of the first reinforcing plate 400 and the second reinforcing plate 500 are close to the mounting tube 200, and the upper ends of the first reinforcing plate 400 and the second reinforcing plate 500 are away from the mounting tube 200. This arrangement allows the rear longitudinal beam lower plate 120 to have more space for arranging other components in the area outside the mounting tube 200. Refer to Figure 5 As shown, in this embodiment, a sub-frame fixing member 1200 is installed on the rear longitudinal beam lower plate 120 behind the second reinforcing plate 500 .

[0058] Furthermore, the contact surface between the first cross beam 600 and the inner side plate 140 of the rear longitudinal beam is a 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 a second contact surface. The first contact surface and the second contact surface at least partially overlap.

[0059] Furthermore, the contact surface between the second cross beam 700 and the inner side plate 140 of the rear longitudinal beam is the third contact surface, 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, and the third contact surface and the fourth contact surface at least partially overlap.

[0060] 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 edge of the first reinforcement plate 400 is connected to the inner side plate 140 of the rear longitudinal beam, and the end of the first cross beam 600 is also connected to the inner side plate 140 of the rear longitudinal beam. Since the first contact surface and the second contact surface at least partially overlap, the first cross beam 600 is not only connected to the first extension beam 800, but also to the first reinforcement plate 400. In this way, the first cross beam 600, the first extension beam 800, and the first reinforcement plate 400 can form a stable force-bearing structure together, and the strength and rigidity of the rear floor assembly are better.

[0061] Similarly, the second cross beam 700 , the second extension beam 900 , and the second reinforcing plate 500 also form a stable force-bearing structure.

[0062] Furthermore, the rear longitudinal beam lower plate 120 includes a first lower plate 122 and a second lower plate 123 which are arranged front and rear along the longitudinal direction of the rear longitudinal beam 100 and are fixedly connected, 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 opened on a complete plate, which can also ensure the connection strength between the mounting tube 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.

[0063] In addition, the present invention also provides a vehicle, comprising the rear floor assembly described in any one of the above embodiments.

[0064] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A rear floor assembly, characterized in that: include: A rear longitudinal beam (100) having a hollow frame-shaped cross section, wherein a bottom wall of the rear longitudinal beam (100) is provided with a first opening (121); A mounting tube (200), wherein a bottom end opening of the mounting tube (200) is connected to the first opening (121), so that the shock absorber is inserted into the mounting tube (200) from below the rear longitudinal beam (100) and fixed thereto; A connecting plate (300) is fixedly arranged between the top of the mounting tube (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) comprising a fixing portion that is fitted and connected to the top of the mounting tube (200), and an extending portion that is fitted to the inner surface of the top wall of the rear longitudinal beam (100).

2. The rear floor assembly according to claim 1, characterized in that: The rear longitudinal beam (100) comprises a rear longitudinal beam upper plate (110) and a rear longitudinal beam outer plate (130); the rear longitudinal beam upper plate (110) is formed with a side flange (112) facing upward on the outer side in the width direction, the side flange (112) is opposite to the rear longitudinal beam outer plate (130); the connecting plate (300) is formed with a first side edge (310) facing upward on the 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) comprises a rear longitudinal beam inner side plate (140), and the connecting plate (300) is 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).

4. The rear floor assembly according to claim 1, characterized in that: The rear floor assembly further comprises a rear floor (1300), a first crossbeam (600) and a second crossbeam (700) which are transversely arranged above the rear floor (1300); the first crossbeam (600) is arranged in front of the mounting tube (200), and the second crossbeam (700) is arranged behind the mounting tube (200).

5. The rear floor assembly according to claim 4, characterized in that: The rear floor assembly further comprises a first extension beam (800) and a second extension beam (900) which are transversely arranged above the rear longitudinal beam (100); the first extension beam (800) is arranged in front of the mounting tube (200), and one end of the first extension beam (800) facing inward is connected to the first cross beam (600); the second extension beam (900) is arranged behind the mounting tube (200), and one end of the second extension beam (900) facing inward is connected to the second cross beam (700).

6. The rear floor assembly according to claim 5, characterized in that: 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) are both arranged below the rear floor (1300).

7. The rear floor assembly according to claim 5, characterized in that: The rear floor assembly also includes a rear wheel housing inner plate (1000) and a rear wheel housing reinforcement plate (1100), wherein the rear wheel housing inner plate (1000) is connected to the outer side of the rear longitudinal beam (100), the rear wheel housing reinforcement plate (1100) is arranged on the inner side of the rear wheel housing inner plate (1000) and extends in the up-down direction, the other end of the first extension beam (800) facing outward is connected to the rear wheel housing reinforcement plate (1100), and the other end of the second extension beam (900) facing outward is connected to the rear wheel housing reinforcement plate (1100).

8. The rear floor assembly according to claim 5, characterized in that: The first extension beam (800) has a first flange (830) extending backwards, and the first flange (830), the top wall of the rear longitudinal beam (100), and the extension portion of the mounting tube (200) are stacked from top to bottom; the second extension beam (900) has a second flange (930) extending forwards, and the second flange (930), the top wall of the rear longitudinal beam (100), and the extension portion of the mounting tube (200) are stacked from top to bottom.

9. The rear floor assembly according to claim 5, characterized in that: A first reinforcing plate (400) is provided in the hollow interior of the rear longitudinal beam (100) in front of the mounting tube (200), and a second reinforcing plate (500) is provided behind the mounting tube (200), wherein the first reinforcing plate (400) and the second reinforcing plate (500) are both arranged transversely in the width direction of the rear longitudinal beam (100).

10. The rear floor assembly according to claim 9, characterized in that: The first reinforcing plate (400) and the second reinforcing plate (500) are both arranged obliquely.

11. The rear floor assembly according to claim 10, characterized in that: 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.

12. The rear floor assembly according to claim 11, characterized in that: The contact surface between the first cross beam (600) and the inner side wall of the rear longitudinal beam (100) is a first contact surface, the contact surface between the first reinforcing plate (400) and 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 according to claim 11, characterized in that: The contact surface between the second cross beam (700) and the inner side wall of the rear longitudinal beam (100) is a third contact surface, the contact surface between the second reinforcing plate (500) and 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 according to any one of claims 1 to 13, characterized in that: The rear longitudinal beam (100) comprises a rear longitudinal beam lower plate (120), the rear longitudinal beam lower plate (120) comprising a first lower plate (122) and a second lower plate (123) which are arranged front and rear along the longitudinal direction of the rear longitudinal beam (100) and are fixedly connected, and the first opening (121) is arranged on one of the first lower plate (122) or the second lower plate (123).

15. A vehicle, characterized in that: Comprising the rear floor assembly as claimed in any one of claims 1 to 14.

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