Vehicle body rear structure and vehicle

Abstract

The utility model provides a vehicle body rear structure and a vehicle. The vehicle body rear structure comprises a rear floor longitudinal beam and a rear coaming connected to the rear end of the rear floor longitudinal beam. A longitudinal beam cavity extending in the front-back direction of the whole vehicle is formed in the rear floor longitudinal beam, and the cross section area of the longitudinal beam cavity close to the rear coaming is gradually increased from front to back in the front-back direction of the whole vehicle. According to the vehicle body rear structure, the area of the cross section of the longitudinal beam cavity close to the rear wall plate is gradually increased from front to back in the front-back direction of the whole vehicle, the connecting strength of the rear floor longitudinal beam and the rear wall plate can be enhanced, the capacity of the rear portion of the vehicle body for coping with low-speed collision can be enhanced, and the vehicle body rear structure has a good using effect.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle body structures, and particularly relates to a rear vehicle body structure. The utility model also relates to a vehicle provided with the above-mentioned rear vehicle body structure. Background Art

[0002] In the prior art, the rear vehicle body structure is an important component of an automobile body. The rear vehicle body structure generally includes a rear bulkhead, a rear floor, and rear floor side rails on both left and right sides, etc. When a rear collision occurs to a vehicle, the rear of the vehicle usually transmits the structural force during the rear collision through the two rear floor side rails on the left and right. As the main component for decomposing and transmitting the collision force in the rear vehicle body structure, the connection between the rear floor side rail and its surrounding structures plays a very important role in the overall structural strength of the rear vehicle body and the transmission of the collision force.

[0003] With the increasingly strict automotive safety collision standards and the increasing emphasis on automotive safety by people, the collision safety of the rear of an automobile has become an important part of improving the overall vehicle quality. However, the rear vehicle body structure in the prior art still has relatively weak overall strength and cannot respond well to low-speed collisions, which is not conducive to the improvement of the overall vehicle quality. Summary of the Utility Model

[0004] In view of this, the utility model aims to propose a rear vehicle body structure capable of improving the ability of the rear vehicle body to cope with low-speed collisions.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A rear vehicle body structure includes a rear floor side rail and a rear bulkhead connected to the rear end of the rear floor side rail;

[0007] A longitudinal beam cavity extending in the front-rear direction of the whole vehicle is provided in the rear floor side rail, and the cross-sectional area of the longitudinal beam cavity near the rear bulkhead part gradually increases from front to back in the front-rear direction of the whole vehicle.

[0008] Further, the rear floor side rail includes an upper longitudinal beam plate and a lower longitudinal beam plate; the longitudinal beam cavity is formed by enclosing between the upper longitudinal beam plate and the lower longitudinal beam plate, and the rear ends of both the upper longitudinal beam plate and the lower longitudinal beam plate are connected to the rear bulkhead.

[0009] Further, the upper longitudinal beam plate includes a front section of the upper longitudinal beam plate and a rear section of the upper longitudinal beam plate, the front section of the upper longitudinal beam plate and the rear section of the upper longitudinal beam plate are lap-connected in the front-rear direction of the whole vehicle, and the rear end of the rear section of the upper longitudinal beam plate is connected to the rear bulkhead.

[0010] Further, the rear section of the longitudinal beam upper plate has a connected straight section and an inclined section; the straight section is connected to the front section of the longitudinal beam upper plate, the inclined section is disposed close to the rear bulkhead, and in the longitudinal direction of the vehicle, the inclined section is inclined upward in the direction pointing to the rear bulkhead.

[0011] Further, the included angle α between the straight section and the inclined section satisfies: 5° ≤ α ≤ 10°.

[0012] Further, in the left-right direction of the vehicle, the dimension W1 of the longitudinal beam cavity located within the rear section of the longitudinal beam upper plate is greater than the dimension W2 of the longitudinal beam cavity located within the longitudinal beam lower plate.

[0013] Further, a connecting flanging that turns upward is provided on the rear section of the longitudinal beam upper plate, and the rear section of the longitudinal beam upper plate is connected to the rear bulkhead through the connecting flanging; a reinforcing member is provided at the rear of the longitudinal beam lower plate, the reinforcing member has a reinforcing plate extending into the longitudinal beam cavity, and a connecting plate connected to the rear end of the reinforcing plate, and the connecting plate is connected to the rear bulkhead.

[0014] Further, a first anti-collision beam mounting hole that penetrates both of them is provided on the rear bulkhead and the connecting flanging; and / or, a second anti-collision beam mounting hole that penetrates both of them is provided on the rear bulkhead and the connecting plate.

[0015] Further, it further includes a rear floor and a rear floor closing plate respectively disposed on the inner and outer sides of the rear floor longitudinal beam; upper plate flangings are respectively provided on the inner and outer sides of the longitudinal beam upper plate, lower plate flangings are respectively provided on the inner and outer sides of the longitudinal beam lower plate, the edge of the rear floor is inserted between the inner upper plate flanging and the lower plate flanging, and the edge of the rear floor closing plate is inserted between the outer upper plate flanging and the lower plate flanging.

[0016] Compared with the prior art, the present utility model has the following advantages:

[0017] For the vehicle body rear structure of the present utility model, by making the cross-sectional area of the longitudinal beam cavity in the part close to the rear bulkhead gradually increase from front to back in the longitudinal direction of the vehicle, the connection strength between the rear floor longitudinal beam and the rear bulkhead can be enhanced, the structure of the overall cavity can be enhanced, so that the rear part of the vehicle body can enhance the ability to cope with low-speed collisions and has a good use effect.

[0018] In addition, the rear floor longitudinal beam adopts an upper longitudinal beam plate and a lower longitudinal beam plate, which has a simple structure and is convenient for the processing and preparation of the longitudinal beam cavity with a changing cross-sectional area. The upper longitudinal beam plate adopts a split structure of a front section of the upper longitudinal beam plate and a rear section of the upper longitudinal beam plate, which can further facilitate the preparation of the longitudinal beam cavity with a changing cross-sectional area, and is also beneficial to the preparation and processing of the rear floor longitudinal beam. To a certain extent, it can match the front section of the upper longitudinal beam plate with different lengths to meet the structural requirements of different vehicle models, and is conducive to improving the versatility of the rear section of the upper longitudinal beam plate.

[0019] Secondly, the rear section of the upper longitudinal beam plate adopts a straight section connected to the front section of the upper longitudinal beam plate and an inclined section close to the rear panel, and the inclined section is inclined upward in the vehicle front-rear direction along the direction pointing to the rear panel. At this time, the size of the longitudinal beam cavity near the rear panel can gradually increase in the vehicle height direction, and the larger the inclination angle of the inclined section, the larger the Z-direction cross-sectional area of the longitudinal beam cavity at this position. The limitation of the included angle between the straight section and the inclined section can, on the one hand, take into account the large occupied space of the rear end of the rear floor longitudinal beam in the vehicle height direction, which makes it difficult to arrange the surrounding components, and on the other hand, can also take into account the structural strength near the connection position between the rear floor longitudinal beam and the rear panel and the vehicle body's ability to cope with low-speed rear collisions.

[0020] Furthermore, in the vehicle left-right direction, the size of the longitudinal beam cavity located in the rear section of the upper longitudinal beam plate is larger than the size of the longitudinal beam cavity located in the lower longitudinal beam plate. In this way, the size of the cross-sectional area of the longitudinal beam cavity in the vehicle left-right direction can be increased, that is, the Y-direction cross-sectional area of the longitudinal beam cavity can be increased, so as to better cope with low-speed collision forces.

[0021] The connecting flanges provided on the rear section of the upper longitudinal beam plate can increase the connection strength between the rear section of the upper longitudinal beam plate and the rear panel, that is, can improve the connection strength between the floor longitudinal beam and the rear panel. The reinforcing member is provided at the rear of the lower longitudinal beam plate, and the reinforcing member has a reinforcing plate extending into the longitudinal beam installation cavity and a connecting plate connected to the rear end of the reinforcing plate. At this time, the structural strength of the rear floor longitudinal beam can be enhanced by using the reinforcing plate, and the connection strength between the lower longitudinal beam plate and the rear panel is also improved by using the connection between the connecting plate and the rear panel.

[0022] In addition, the first anti-collision beam installation holes provided on the connecting flanges and the second anti-collision beam installation holes provided on the connecting plates are not only convenient for the installation and arrangement of the anti-collision beam, but also conducive to the dispersion of the force acting on the anti-collision beam along the rear floor longitudinal beam during a rear collision. The rear floor is connected between the inner upper longitudinal beam plate and the lower longitudinal beam plate, and the rear floor closing plate is connected between the outer upper longitudinal beam plate and the lower longitudinal beam plate. Thus, a three-layer welding form is formed between the rear floor and the longitudinal beam, and between the rear floor closing plate and the longitudinal beam, which can avoid problems such as excessive gaps caused by peripheral boundary avoidance and four-layer overlapping surfaces and the need for sealing and anti-corrosion treatment. Another object of the present invention is to provide a vehicle, in which the vehicle body rear structure as described above is provided.

[0023] By adopting the above-mentioned rear body structure, the vehicle of the present utility model can utilize the characteristic that the cross-sectional area of the longitudinal beam cavity gradually increases from front to back in the longitudinal direction of the whole vehicle, which can enhance the vehicle's response ability during low-speed collisions, thereby facilitating the improvement of the safety performance of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0025] Figure 1 is a schematic structural diagram of the rear body structure according to the embodiment of the present utility model from the first perspective;

[0026] Figure 2 is a schematic structural diagram of the rear body structure according to the embodiment of the present utility model from the second perspective;

[0027] Figure 3 is a schematic structural diagram of the cooperation state of the rear floor longitudinal beam and the rear panel according to the embodiment of the present utility model;

[0028] Figure 4 is Figure 3 a cross-sectional view taken along the A-A viewing direction in;

[0029] Figure 5 is Figure 4 a partial enlarged view of the rear section of the longitudinal beam upper plate in;

[0030] Figure 6 is Figure 3 a sectional view taken along the B-B section in;

[0031] Figure 7 is a schematic structural diagram of the rear section of the longitudinal beam upper plate according to the embodiment of the present utility model;

[0032] Figure 8 is a schematic structural diagram of the reinforcing member according to the embodiment of the present utility model;

[0033] DESCRIPTION OF THE REFERENCE NUMERALS:

[0034] 1. Rear floor longitudinal beam; 101. Longitudinal beam lower plate; 102. Longitudinal beam upper plate; 1011. Reinforcing member; 1012. Longitudinal beam reinforcing plate; 1021. Front section of the longitudinal beam upper plate; 1022. Rear section of the longitudinal beam upper plate; 10111. Reinforcing plate; 10112. Connecting plate; 10221. Straight section; 10222. Inclined section; 10223. Connecting flanging; 10. Upper plate flanging; 20. Lower plate flanging;

[0035] 2. Rear bulkhead; 201. Outer panel of rear bulkhead; 202. Inner panel of rear bulkhead;

[0036] 3. Rear floor;

[0037] 4. Rear floor sealing plate;

[0038] 100. Longitudinal beam cavity; 200. Rear bulkhead cavity; 300. Anti-collision beam mounting bolt. Detailed implementation manners

[0039] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0040] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connecting member" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0042] In addition, it should be noted that the orientation terms such as "upper, lower, left, right, front, rear" used in the description of the present utility model are defined based on the up-down direction, left-right direction and front-back direction of the vehicle. Among them, the up-down direction of the vehicle is also the height direction (Z direction) of the vehicle, the front-back direction of the vehicle is also the length direction (X direction) of the vehicle, and the left-right direction of the vehicle is also the width direction (Y direction) of the vehicle. "Inner" and "outer" are defined based on the contour of the corresponding component. For example, the inside and outside of the vehicle are defined based on the contour of the vehicle, and the side close to the middle of the vehicle is "inner", and vice versa.

[0043] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0044] Embodiment 1

[0045] This embodiment relates to a rear body structure, which can improve the ability of the rear body to cope with low-speed collisions.

[0046] In terms of the overall composition, in combination with Figures 1 to 6 As shown, the rear body structure of this embodiment includes a rear floor longitudinal beam 1 and a rear panel 2 connected to the rear end of the rear floor longitudinal beam 1. Among them, a longitudinal beam cavity 100 extending in the front-rear direction of the whole vehicle is provided in the rear floor longitudinal beam 1, and in the front-rear direction of the whole vehicle from front to rear, the cross-sectional area of the longitudinal beam cavity 100 near the rear panel 2 is gradually increased.

[0047] At this time, in the above structure, the cross-sectional area of the longitudinal beam cavity 100 near the rear panel 2 is gradually increased from front to rear in the front-rear direction of the whole vehicle, which can enhance the connection strength between the rear floor longitudinal beam 1 and the rear panel 2, enhance the structure of the overall cavity, and enable the rear part of the vehicle body to enhance the ability to cope with low-speed collisions.

[0048] Based on the above overall introduction, in detail, as a preferred embodiment, continue to refer to Figures 1 to 6 As shown, in this embodiment, the rear floor longitudinal beam 1 includes a longitudinal beam upper plate 102 and a longitudinal beam lower plate 101 connected to each other. The longitudinal beam lower plate 101 has a trough-shaped structure and has a U-shaped groove. The longitudinal beam upper plate 102 is covered on the longitudinal beam lower plate 101, so that a longitudinal beam cavity 100 is formed between the longitudinal beam upper plate 102 and the longitudinal beam lower plate 101, and the rear ends of the longitudinal beam upper plate 102 and the longitudinal beam lower plate 101 are both connected to the rear panel 2. At this time, the rear floor longitudinal beam 1 adopts a split structure of the longitudinal beam upper plate 102 and the longitudinal beam lower plate 101, and its structure is relatively simple, which is convenient for the preparation and molding of the longitudinal beam cavity 100 with variable cross-sectional area, thus facilitating the processing and preparation of the rear floor longitudinal beam 1.

[0049] Refer to Figure 1 and Figure 2 As shown, in terms of the specific structure of the rear panel 2, it includes a rear panel outer plate 201 and a rear panel inner plate 202 connected to each other, and in order to ensure the structural strength of the rear panel 2, a rear panel cavity 200 is also formed between the rear panel outer plate 201 and the rear panel inner plate 202. In addition, in order to facilitate the preparation of the rear panel inner plate 202, in this embodiment, the rear panel inner plate 202 includes a rear panel inner plate left connecting plate, a rear panel inner plate middle plate and a rear panel inner plate right connecting plate, and the rear panel inner plate left connecting plate, the rear panel inner plate middle plate and the rear panel inner plate right connecting plate are arranged in sequence from left to right in the vehicle width direction. There are two rear floor longitudinal beams 1 arranged left and right, and the two rear floor longitudinal beams 1 are respectively connected to the rear panel inner plate left connecting plate and the rear panel inner plate right connecting plate.

[0050] As a further preferred embodiment, in this embodiment, the upper longitudinal beam plate 102 includes a front section 1021 and a rear section 1022 of the upper longitudinal beam plate. Among them, the front section 1021 and the rear section 1022 of the upper longitudinal beam plate are overlapped and connected in the front-rear direction of the whole vehicle, and the rear end of the rear section 1022 of the upper longitudinal beam plate is connected to the rear bulkhead 2. At this time, the longitudinal beam cavity 100 formed by the rear section 1022 of the upper longitudinal beam plate and the lower longitudinal beam plate 101 has a cross-sectional area that gradually increases from front to back in the front-rear direction of the whole vehicle, which is further beneficial to the preparation and forming of the longitudinal beam cavity 100, further beneficial to the preparation and processing of the rear floor longitudinal beam 1, and to a certain extent, the rear section 1022 of the upper longitudinal beam plate can be matched with the front section 1021 of the upper longitudinal beam plate with different lengths to meet the structural requirements of different vehicle models, which is beneficial to improving the versatility of the rear section 1022 of the upper longitudinal beam plate.

[0051] In terms of the specific structure, from Figure 7 Combined with Figures 1 to 6 As shown, in this embodiment, the rear section 1022 of the upper longitudinal beam plate has a connected straight section 10221 and an inclined section 10222. Among them, the straight section 10221 is overlapped and connected with the front section 1021 of the upper longitudinal beam plate, the inclined section 10222 is arranged close to the rear bulkhead 2, and in the front-rear direction of the whole vehicle, the inclined section 10222 is inclined upward in the direction pointing to the rear bulkhead 2. With such a setting, the size of the part of the longitudinal beam cavity 100 close to the rear bulkhead 2 can gradually increase in the height direction of the whole vehicle, and the larger the inclination angle of the inclined section 10222, the larger the Z-direction cross-sectional area of the longitudinal beam cavity 100 at this position.

[0052] Preferably, in this embodiment, the included angle α between the straight section 10221 and the inclined section 10222 satisfies: 5° ≤ α ≤ 10°. By limiting this included angle α, on the one hand, it can take into account the problem that it is not easy to arrange the surrounding components due to the large occupied space of the rear end of the rear floor longitudinal beam 1 in the height direction of the whole vehicle, and on the other hand, it can also take into account the structural strength near the connection position between the rear floor longitudinal beam 1 and the rear bulkhead 2 and the ability to cope with low-speed rear collisions at the rear of the vehicle body. Moreover, in specific implementation, the included angle α can be set to 5°, 6°, 7°, 8°, 9° or 10°, etc.

[0053] In this embodiment, combined with Figures 4 to 7 As shown, in the left-right direction of the whole vehicle, the size W1 of the longitudinal beam cavity 100 located in the rear section of the upper longitudinal beam plate 102 is greater than the size W2 of the longitudinal beam cavity 100 located in the lower longitudinal beam plate 101. With such a setting, the size of the cross-sectional area of the longitudinal beam cavity 100 in the left-right direction of the whole vehicle can be increased, that is, the Y-direction cross-sectional area of the longitudinal beam cavity 100 can be increased, so as to better cope with low-speed collision forces.

[0054] Refer to Figures 1 to 7As shown, in this embodiment, an upwardly folded connecting flange 10223 is provided on the rear section 1022 of the longitudinal beam upper plate, and the rear section 1022 of the longitudinal beam upper plate is welded to the rear panel 2 via the connecting flange 10223 .

[0055] In order to improve the structural strength of the rear floor longitudinal beam 1, in this embodiment, a longitudinal beam reinforcement plate 1012 located in the longitudinal beam cavity 100 is provided on the longitudinal beam lower plate 101, the longitudinal beam reinforcement plate 1012 is welded to the longitudinal beam lower plate 101, and the longitudinal beam reinforcement plate 1012 is provided with reinforcement ribs protruding toward the longitudinal beam cavity 100, which can further improve the structural strength of the rear floor longitudinal beam 1.

[0056] Moreover, in this embodiment, a reinforcement member 1011 is also provided at the rear of the longitudinal beam lower plate 101. Figure 2 , Figure 4 and Figure 8 As shown, the reinforcement 1011 has a reinforcement plate 10111 extending into the longitudinal beam cavity 100 , and a connecting plate 10112 connected to the rear end of the reinforcement plate 10111 , and the connecting plate 10112 is welded to the rear panel 2 .

[0057] At this time, the connecting flange 10223 and the connecting plate 10112 are both welded to the rear panel 2, so that a complete longitudinal beam cavity 100 is formed between the rear end of the rear floor longitudinal beam 1 and the rear panel 2, so that the overall structure of the rear floor longitudinal beam 1 is strengthened. In addition, the connecting flange 10223 set on the longitudinal beam upper plate rear section 1022 is connected to the rear panel 2, which can increase the connection strength between the longitudinal beam upper plate rear section 1022 and the rear panel 2, that is, it can improve the connection strength between the rear floor longitudinal beam 1 and the rear panel 2. At the same time, the reinforcing plate 10111 can enhance the structural strength of the rear floor longitudinal beam 1, and the connection of the connecting plate 10112 to the rear panel 2 is also conducive to improving the connection strength between the longitudinal beam lower plate 101 and the rear panel 2.

[0058] As a preferred embodiment, in this embodiment, a first anti-collision beam mounting hole is provided on the rear panel 2 and the connecting flange 10223 and penetrates both. Moreover, a second anti-collision beam mounting hole is provided on the rear panel 2 and the connecting plate 10112 and penetrates both. At this time, the first anti-collision beam mounting hole provided on the connecting flange 10223 and the second anti-collision beam mounting hole provided on the connecting plate 10112 not only facilitate the installation and arrangement of the anti-collision beam, but also facilitate the force acting on the anti-collision beam to be dispersed along the rear floor longitudinal beam 1 during a rear collision.

[0059] During specific implementation, the anti-collision beam is screwed and fixed to the outer side of the rear panel 2 by means of an anti-collision beam mounting bolt 300 passing through the first anti-collision beam mounting hole and an anti-collision beam mounting bolt 300 passing through the second anti-collision beam mounting hole.

[0060] It should be noted that, corresponding to the rear floor longitudinal beam 1 on the same side, the first anti-collision beam mounting hole and the second anti-collision beam mounting hole are jointly used to connect one end of the anti-collision beam. Additionally, it is also worth noting that, in addition to setting the first anti-collision beam mounting hole on the rear panel 2 and the connecting flange 10223, and setting the second anti-collision beam mounting hole on the rear panel 2 and the connecting plate 10112, it can also only set the first anti-collision beam mounting hole, or only set the second anti-collision beam mounting hole, so that the anti-collision beam is connected to the rear panel 2 and the connecting flange 10223, or the anti-collision beam is connected to the rear panel 2 and the connecting plate 10112, and this is also feasible.

[0061] In addition, in this embodiment, the rear body structure further includes a rear floor 3 and a rear floor closing panel 4 which are respectively disposed inside and outside the rear floor longitudinal beam 1. Figure 1 、 Figure 2 Combined with Figure 6 and Figure 7 As shown, upper plate flanges 10 are respectively provided on the inside and outside of the upper plate of the longitudinal beam 102, lower plate flanges 20 are respectively provided on the inside and outside of the lower plate of the longitudinal beam 101, the edge of the rear floor 3 is inserted between the inner upper plate flange 10 and the lower plate flange 20, and the edge of the rear floor closing panel 4 is inserted between the outer upper plate flange 10 and the lower plate flange 20. At this time, a three-layer welding form is formed between the rear floor 3 and the rear floor longitudinal beam 1, and between the rear floor closing panel 4 and the rear floor longitudinal beam 1, which can avoid problems such as excessive gaps caused by peripheral boundary avoidance and four-layer lap joints and the need for sealing and anti-corrosion treatment.

[0062] During specific implementation, the front section 1021 of the upper plate of the longitudinal beam and the rear section 1022 of the upper plate of the longitudinal beam overlap, and a plurality of welding points of two-layer welding are formed at intervals at the overlapping part. Between the upper plate flange 10, the rear floor 3 and the lower plate flange 20, and between the upper plate flange 10, the rear floor closing panel 4 and the lower plate flange 20, a plurality of welding points of three-layer welding are formed. Between the upper plate flange 10, the front section 1021 of the upper plate of the longitudinal beam and the rear floor 3, and between the upper plate flange 10, the front section 1021 of the upper plate of the longitudinal beam and the rear floor closing panel 4, welding points of three-layer welding are also formed. Thus, the four-layer welding structure between the rear end structure of the rear floor longitudinal beam 1 and the rear panel 2 can be avoided, and thus the problem of excessive gaps caused by four-layer welding and the need for sealing and anti-corrosion treatment can also be avoided.

[0063] For the rear body structure of this embodiment, through structural optimization, the cross-sectional area of the rear part of the longitudinal beam cavity 100 is gradually increased from front to back in the longitudinal direction of the vehicle. Thereby, the connection strength between the rear floor longitudinal beam 1 and the rear panel 2 can be enhanced, the structure of the overall cavity can be enhanced, and thus the ability of the rear part of the vehicle body to cope with low-speed collisions can be improved, and it has a very good use effect.

[0064] Embodiment Two

[0065] This embodiment relates to a vehicle, in which the vehicle rear body structure described in Embodiment 1 is provided.

[0066] By adopting the vehicle rear body structure of Embodiment 1, the vehicle of this embodiment can utilize the characteristic that the cross-sectional area of the longitudinal beam cavity 100 gradually increases from front to back in the longitudinal direction of the whole vehicle, and can enhance the vehicle's response ability during low-speed collisions, thereby facilitating the improvement of the overall safety performance of the vehicle.

[0067] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rear body structure, characterized in that: It includes a rear floor longitudinal beam (1) and a rear panel (2) connected to the rear end of the rear floor longitudinal beam (1); A longitudinal beam cavity (100) extending in the front-rear direction of the vehicle is provided in the rear floor longitudinal beam (1), and the cross-sectional area of the longitudinal beam cavity (100) in the part close to the rear panel (2) gradually increases from front to rear in the front-rear direction of the vehicle.

2. The rear body structure according to claim 1, characterized in that: The rear floor longitudinal beam (1) includes a longitudinal beam upper plate (102) and a longitudinal beam lower plate (101); The longitudinal beam cavity (100) is formed by enclosing between the longitudinal beam upper plate (102) and the longitudinal beam lower plate (101), and the rear ends of the longitudinal beam upper plate (102) and the longitudinal beam lower plate (101) are both connected to the rear panel (2).

3. The rear body structure according to claim 2, characterized in that: The longitudinal beam upper plate (102) includes a front section of the longitudinal beam upper plate (1021) and a rear section of the longitudinal beam upper plate (1022), the front section of the longitudinal beam upper plate (1021) and the rear section of the longitudinal beam upper plate (1022) are lap-connected in the front-rear direction of the vehicle, and the rear end of the rear section of the longitudinal beam upper plate (1022) is connected to the rear panel (2).

4. The rear body structure according to claim 3, characterized in that: The rear section of the longitudinal beam upper plate (1022) has a connected straight section (10221) and an inclined section (10222); The straight section (10221) is connected to the front section of the longitudinal beam upper plate (1021), the inclined section (10222) is arranged close to the rear panel (2), and in the front-rear direction of the vehicle, the inclined section (10222) is inclined upward in the direction pointing to the rear panel (2).

5. The rear body structure according to claim 4, characterized in that: The included angle α between the straight section (10221) and the inclined section (10222) satisfies: 5° ≤ α ≤ 10°.

6. The rear body structure according to claim 3, characterized in that: In the left-right direction of the vehicle, the dimension W1 of the longitudinal beam cavity (100) located in the rear section of the longitudinal beam upper plate (102) is greater than the dimension W2 of the longitudinal beam cavity (100) located in the longitudinal beam lower plate (101).

7. The rear body structure according to claim 3, characterized in that: A connecting flange (10223) that turns upward is provided on the rear section of the longitudinal beam upper plate (1022), and the rear section of the longitudinal beam upper plate (1022) is connected to the rear panel (2) through the connecting flange (10223); A reinforcing member (1011) is provided at the rear of the longitudinal beam lower plate (101), the reinforcing member (1011) has a reinforcing plate (10111) extending into the longitudinal beam cavity (100) and a connecting plate (10112) connected to the rear end of the reinforcing plate (10111), and the connecting plate (10112) is connected to the rear panel (2).

8. The rear body structure according to claim 7, characterized in that: The rear bulkhead (2) and the connecting flange (10223) are provided with a first anti-collision beam mounting hole penetrating through both of them; and / or, The rear bulkhead (2) and the connecting plate (10112) are provided with a second anti-collision beam mounting hole penetrating through both of them.

9. The vehicle rear body structure according to any one of claims 2 to 8, characterized in that: It further includes a rear floor (3) and a rear floor closing plate (4) respectively disposed inside and outside the rear floor longitudinal beam (1); Upper flanges (10) are respectively provided on the inner and outer sides of the longitudinal beam upper plate (102), lower flanges (20) are respectively provided on the inner and outer sides of the longitudinal beam lower plate (101), the edge of the rear floor (3) is inserted between the inner upper flange (10) and the lower flange (20), and the edge of the rear floor closing plate (4) is inserted between the outer upper flange (10) and the lower flange (20).

10. A vehicle, characterized in that: The vehicle is provided with the vehicle rear body structure according to any one of claims 1 to 9.

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