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 an integrally formed die casting, and the die casting is provided with rear floor longitudinal beam front sections arranged on the left side and the right side respectively and a rear floor cross beam connected between the rear floor longitudinal beam front sections on the two sides; the rear floor longitudinal beam rear sections are connected with the rear ends of the rear floor longitudinal beam front sections on the two sides respectively, the rear floor longitudinal beam rear sections on the two sides are formed by buckling and connecting a plurality of metal plates, and longitudinal beam rear section cavities are formed in the rear floor longitudinal beam rear sections on the two sides. The vehicle body rear structure is convenient to process and manufacture, ensures the processing precision, and is beneficial to improving the structural strength of the rear floor, so that the rigidity of the vehicle body rear structure and the rigidity of the whole vehicle can be improved, and the whole vehicle has better collision safety.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle bodies, in particular to a rear body structure. At the same time, the utility model also relates to a vehicle provided with the rear body structure. Background Art

[0002] The rear floor of an automobile is an important part of the rear body structure. It has the important functions of carrying seats and passengers, and effectively dispersing and absorbing collision energy during a rear collision, reducing the deformation and collapse of the passenger compartment, and thus reducing passenger injuries. Therefore, the structural performance of the rear floor of an automobile plays an important role in the vehicle.

[0003] During the manufacturing process of the rear floor beam, a sheet metal welded structure formed by welding multiple sheet metal parts through spot welding process is generally adopted, and it is welded with a sheet metal panel to form an integral rear floor of the automobile. Not only are there many components, which is inconvenient for processing and manufacturing, but also the overall rear floor has a low local structural connection reliability due to the influence of the connection performance of the solder joints. Therefore, the traditional rear body structure usually also has the problems of many components of the rear floor beam, inconvenient processing and manufacturing, and insufficient strength of the rear floor structure, which is not conducive to the improvement of the overall vehicle collision performance. Summary of the Utility Model

[0004] In view of this, the utility model aims to provide a rear body structure with better collision performance.

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

[0006] A rear body structure includes an integrally formed die-cast part, and the die-cast part has front sections of rear floor longitudinal beams respectively arranged on the left and right sides, and a rear floor cross beam connected between the front sections of the rear floor longitudinal beams on both sides;

[0007] It further includes rear sections of rear floor longitudinal beams respectively connected to the rear ends of the front sections of the rear floor longitudinal beams on both sides. Each rear section of the rear floor longitudinal beam is formed by snap-fitting multiple sheet metals, and a cavity of the rear section of the longitudinal beam is formed inside each rear section of the rear floor longitudinal beam.

[0008] Furthermore, the sheet metals forming each rear section of the rear floor longitudinal beam include an upper plate of the rear section of the longitudinal beam and a lower plate of the rear section of the longitudinal beam which are arranged opposite to each other up and down, and a cover plate of the rear section of the longitudinal beam connected between the upper plate of the rear section of the longitudinal beam and the lower plate of the rear section of the longitudinal beam; the front ends of the upper plate of the rear section of the longitudinal beam, the lower plate of the rear section of the longitudinal beam and the cover plate of the rear section of the longitudinal beam on each side are all connected to the rear end of the front section of the rear floor longitudinal beam on the same side.

[0009] Further, at the end of the front section of each side's rear floor longitudinal beam, a first cavity in the shape of a "square" is formed. The front ends of the upper plate of the rear section of each side's longitudinal beam, the lower plate of the rear section of the longitudinal beam, and the cover plate of the rear section of the longitudinal beam are arranged around the first cavity on the same side, and the first cavity on each side communicates with the cavity of the rear section of the longitudinal beam on the same side.

[0010] Further, it further includes the front parts of the rear floor longitudinal beams respectively connected to the front ends of the front sections of each side's rear floor longitudinal beam; the front parts of the rear floor longitudinal beams on each side respectively include an upper plate of the front part of the longitudinal beam, a lower plate of the front part of the longitudinal beam, and a rear section of the sill beam that are snap-connected together, and the upper plate of the front part of the longitudinal beam, the lower plate of the front part of the longitudinal beam, and the rear section of the sill beam on each side enclose and form a cavity of the front part of the longitudinal beam.

[0011] Further, at the end of the front end of each side's front section of the rear floor longitudinal beam, a second cavity in the shape of a "day" is formed. The rear ends of the upper plate of the front part of the longitudinal beam, the lower plate of the front part of the longitudinal beam, and the rear section of the sill beam on each side are arranged around the second cavity on the same side, and the second cavity on each side communicates with the cavity of the front part of the longitudinal beam on the same side.

[0012] Further, a front panel is connected between the front parts of the rear floor longitudinal beams on both sides and the die-cast part, and the die-cast part is provided with a front overlapping edge connected to the front panel, and a front cross beam of the rear floor connected to the front panel is connected between the front parts of the rear floor longitudinal beams on both sides; and / or, a rear panel is connected between the rear sections of the rear floor longitudinal beams on both sides and the die-cast part, and the die-cast part is provided with a rear overlapping edge connected to the rear panel, and a rear cross beam of the rear floor connected to the rear panel is connected between the rear sections of the rear floor longitudinal beams on both sides.

[0013] Further, the rear floor cross beam includes a middle cross beam of the rear floor and an upper cross beam of the rear floor connected between the front sections of the rear floor longitudinal beams on both sides, and the die-cast part further has inner wheelhouse panels respectively connected to the front sections of the rear floor longitudinal beams on both sides.

[0014] Further, the cross sections of the front sections of the rear floor longitudinal beams on both sides are both in the shape of an "E" that opens to the outside of the vehicle in the left-right direction of the whole vehicle, and longitudinal beam reinforcing ribs arranged in the up-down direction of the whole vehicle are respectively provided in each of the front sections of the rear floor longitudinal beams; and / or, seat belt installation points are provided on the front sections of the rear floor longitudinal beams on both sides, and an installation boss protruding forward in the front-rear direction of the whole vehicle is provided on the middle cross beam of the rear floor, and a seat installation point is provided on the installation boss.

[0015] Further, subframe installation points and shock absorber spring installation points are respectively provided at the bottoms of the front sections of the rear floor longitudinal beams on both sides, and rear shock absorber installation points are respectively provided on the inner wheelhouse panels on both sides; and / or, outer wheelhouse panels are respectively connected to the inner wheelhouse panels on both sides.

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

[0017] For the vehicle body rear structure of the utility model, the front sections of the two side rear floor longitudinal beams and the rear floor cross beam are integrally formed on the die-cast part, which can reduce the number of rear floor components, facilitate processing and manufacturing, ensure processing accuracy, and is also beneficial to improving the structural strength of the rear floor. At the same time, a longitudinal beam rear section cavity is formed in the rear section of the rear floor longitudinal beam, which can also make the rear section of the rear floor longitudinal beam have better structural strength, and further improve the structural strength of the rear floor. Thus, the vehicle body rear structure can have better stiffness, which helps to improve the vehicle's collision safety.

[0018] In addition, the rear section of the rear floor longitudinal beam is mainly composed of an upper plate of the longitudinal beam rear section, a lower plate of the longitudinal beam rear section, and a cover plate of the longitudinal beam rear section, making the structure simple and the number of sheet metals small, which is conducive to preparation. The front ends of the upper plate of the longitudinal beam rear section, the lower plate of the longitudinal beam rear section, and the cover plate of the longitudinal beam rear section on each side surround the same-side first cavity, and each side first cavity communicates with the same-side longitudinal beam rear section cavity, which is easy to connect the sheet metal of the rear section of the rear floor longitudinal beam with the front section of the rear floor longitudinal beam, and can increase the strength of the connection position between the front and rear sections of the rear floor. The front part of the rear floor longitudinal beam is mainly composed of an upper plate of the longitudinal beam front part, a lower plate of the longitudinal beam front part, and a rear section of the sill beam, and encloses and forms a longitudinal beam front part cavity, which can increase the strength of the connection position between the middle and rear parts of the vehicle body, and together with the die-cast part, improve the stiffness of the vehicle body C-ring position.

[0019] Moreover, the rear ends of the upper plate of the longitudinal beam front part, the lower plate of the longitudinal beam front part, and the rear section of the sill beam on each side surround the same-side second cavity, and each side second cavity communicates with the same-side longitudinal beam front part cavity, which is easy to connect the sheet metal of the front section of the rear floor longitudinal beam with the front section of the rear floor longitudinal beam, and can increase the strength of the connection position between the front and rear sections. By setting a lapping edge on the die-cast part, it is convenient to connect with the panel, and at the same time, the front cross beam of the rear floor and the rear cross beam of the rear floor can be used to better increase the structural strength of the vehicle body rear. The rear floor cross beam includes a middle cross beam of the rear floor and an upper cross beam of the rear floor. An inner panel of the rear wheel housing is provided on the front section of the rear floor longitudinal beam, which can further reduce the number of rear floor components, facilitate processing and preparation, and improve the structural strength.

[0020] In addition, the cross sections of the front sections of the two side rear floor longitudinal beams are both "E"-shaped, and combined with the longitudinal beam reinforcing ribs arranged along the up and down direction of the whole vehicle, each front section of the rear floor longitudinal beam can have good bending resistance, which is beneficial to improving the overall strength of the rear floor frame structure. Seat belt installation points are provided on the front section of the rear floor longitudinal beam, seat installation points are provided on the installation bosses of the middle cross beam of the rear floor, subframe installation points and shock absorber spring installation points are respectively provided at the bottoms of the front sections of the two side rear floor longitudinal beams, and rear shock absorber installation points are respectively provided on the two inner panels of the rear wheel housings. On the premise of integrally die-casting the die-cast part, compared with the traditional technology, it can prevent the reduction of the structural strength at the positions of each installation point caused by using too many connection points, thereby improving the installation reliability of each installation point.

[0021] Another object of the present utility model is to provide a vehicle, in which the rear body structure as described above is provided in the vehicle body of the vehicle.

[0022] The vehicle according to the present utility model is provided with the above-mentioned rear body structure, which can be easily processed and manufactured while having good structural strength, thereby facilitating the improvement of the overall vehicle collision performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0024] Figure 1 is a schematic diagram of the overall structure of the rear body structure according to an embodiment of the present utility model;

[0025] Figure 2 is a schematic diagram of the structure of the die-cast part according to an embodiment of the present utility model;

[0026] Figure 3 、 Figure 4 、 Figure 7 and Figure 8 are Figure 2 schematic diagrams of the structure shown in

[0027] Figure 5 are Figure 4 a sectional view taken along the line A-A in

[0028] Figure 6 are Figure 5 an enlarged view of part B in

[0029] Figure 9 is a schematic diagram of the structure when the rear section of the rear floor longitudinal beam and the rear cross beam of the rear floor are assembled according to an embodiment of the present utility model;

[0030] Figure 10 are Figure 9 an enlarged view of part C in

[0031] Figure 11 is a schematic diagram of the structure of the front part of the rear floor longitudinal beam according to an embodiment of the present utility model;

[0032] Figure 12 is a schematic diagram of the structure of the rear section of the sill beam according to an embodiment of the present utility model;

[0033] Figure 13 is a schematic diagram of the structure of the upper plate of the front part of the longitudinal beam according to an embodiment of the present utility model;

[0034] Figure 14Schematic diagram of the structure of the front lower plate of the longitudinal beam according to the embodiment of the present utility model;

[0035] Explanation of reference numerals:

[0036] 10. Die-casting; 11. Front section of the rear floor longitudinal beam; 11a. Front bottom wall; 11b. Front top wall; 11c. Front side wall; 11d. Intermediate wall; 111. Seat belt mounting point; 112. Subframe mounting point; 113. Shock absorber spring mounting point; 114. Longitudinal beam reinforcing rib; 115. Diagonal reinforcing rib; 116. Lower force transmission rib of the longitudinal beam; 117. Cross rib; 118. First cavity; 119. Second cavity;

[0037] 12. Middle cross beam of the rear floor; 121. Mounting boss; 122. Seat mounting point; 123. Cross-shaped cross rib;

[0038] 13. Upper cross beam of the rear floor; 131. Wavy reinforcing rib;

[0039] 14. Inner panel of the rear wheel housing; 141. Rear shock absorber mounting point; 142. Outer reinforcing rib of the wheel housing; 143. Inner reinforcing rib of the wheel housing; 144. Diagonal force transmission rib;

[0040] 15. Skeleton panel; 151. Raised rib;

[0041] 16. Front overlapping edge; 17. Rear overlapping edge;

[0042] 20. Rear section of the rear floor longitudinal beam; 21. Upper plate of the longitudinal beam rear section; 22. Lower plate of the longitudinal beam rear section; 23. Cover plate of the longitudinal beam rear section; 24. Reinforcing plate;

[0043] 30. Front part of the rear floor longitudinal beam; 31. Upper plate of the longitudinal beam front part; 311. First upper plate flanging; 312. Second upper plate flanging; 32. Lower plate of the longitudinal beam front part; 321. Lower plate connection flanging; 322. Contact surface; 33. Rear section of the sill beam; 34. Cavity of the longitudinal beam front part;

[0044] 40. Front panel; 50. Rear panel; 60. Front cross beam of the rear floor; 70. Rear cross beam of the rear floor; 80. Outer panel of the rear wheel housing. Detailed implementation manners

[0045] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0046] 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 component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to 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.

[0047] Taking the vehicle where the rear body structure described in the present utility model is located as an example, the orientation terms such as "upper, lower, left, right, front, rear" used in the embodiments are defined based on the up and down direction (also known as the height direction, or the vehicle's Z direction), left and right direction (also known as the width direction, or the vehicle's Y direction), and front and rear direction (also known as the length direction, or the vehicle's X direction) of the vehicle. "Inner" and "outer" are defined based on the contour of the corresponding component. For example, "inner" and "outer" defined based on the vehicle contour, the side closer to the middle of the vehicle is "inner", and vice versa is "outer".

[0048] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" 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 components. 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.

[0049] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0050] Embodiment 1

[0051] This embodiment relates to a rear body structure, which can improve the problems in the traditional technology that the rear floor beam is not convenient for processing and manufacturing, and is not conducive to improving the strength of the rear floor structure.

[0052] In terms of the overall structure, as Figure 1 shown, the rear body structure of this embodiment includes an integrally formed die-casting part 10, and the die-casting part 10 has front sections 11 of rear floor longitudinal beams respectively arranged on the left and right sides, and a rear floor cross beam connected between the front sections 11 of the rear floor longitudinal beams on both sides.

[0053] Moreover, the rear body structure further includes a rear section of the rear floor longitudinal beam 20 respectively connected to the rear ends of the front sections 11 of the rear floor longitudinal beams on both sides. Each rear section of the rear floor longitudinal beam 20 is formed by snap-fitting a plurality of sheet metals, and a cavity of the rear section of the longitudinal beam is formed within each rear section of the rear floor longitudinal beam 20.

[0054] At this time, with the above settings, by integrally forming the front sections 11 of the rear floor longitudinal beams on both sides and the rear floor cross beam on the die-cast part 10, the number of rear floor components can be reduced, which is convenient for processing and manufacturing, and can ensure processing accuracy. It is also beneficial to improve the structural strength of the rear floor. At the same time, a cavity of the rear section of the longitudinal beam is formed within the rear section of the rear floor longitudinal beam 20, which can also enable the rear section of the rear floor longitudinal beam 20 to have better structural strength to further improve the structural strength of the rear floor. Thus, the rear body structure can have better rigidity, which helps to improve the vehicle's collision performance. At the same time, it can be understood that the rear section of the rear floor longitudinal beam 20 includes a plurality of sheet metals, which is also beneficial for realizing the welding between the rear section of the rear floor longitudinal beam 20 and surrounding components and reducing the impact on the assembly welding line operation.

[0055] Based on the above overall introduction, in detail, in this embodiment, during specific implementation, as a preferred implementation form, in combination with Figure 1 , Figure 9 and Figure 10 shown, the sheet metals connecting to form each rear section of the rear floor longitudinal beam 20 all include an upper plate 21 of the rear section of the longitudinal beam and a lower plate 22 of the rear section of the longitudinal beam arranged opposite to each other up and down, and a cover plate 23 of the rear section of the longitudinal beam connected between the upper plate 21 of the rear section of the longitudinal beam and the lower plate 22 of the rear section of the longitudinal beam. Moreover, the front ends of the upper plate 21 of the rear section of the longitudinal beam, the lower plate 22 of the rear section of the longitudinal beam, and the cover plate 23 of the rear section of the longitudinal beam on each side are all connected to the rear end of the front section 11 of the rear floor longitudinal beam on the same side.

[0056] Since the rear section of the rear floor longitudinal beam 20 is mainly composed of the upper plate 21 of the rear section of the longitudinal beam, the lower plate 22 of the rear section of the longitudinal beam, and the cover plate 23 of the rear section of the longitudinal beam, the structure can be simple, the number of sheet metals is small, and it is beneficial for preparation. Specifically, the upper plate 21 of the rear section of the longitudinal beam, the lower plate 22 of the rear section of the longitudinal beam, and the cover plate 23 of the rear section of the longitudinal beam can be welded together. Moreover, to further improve the structural strength of the rear section of the rear floor longitudinal beam 20, if necessary, as shown in Figure 10 , a reinforcing plate 24 can be arranged in the cavity of the rear section of the longitudinal beam, and one side of the reinforcing plate 24 is connected to the upper plate 21 of the rear section of the longitudinal beam, and the other side of the reinforcing plate 24 is connected to the lower plate 22 of the rear section of the longitudinal beam.

[0057] At this time, in combination with Figure 8 and Figure 10As shown in the figure, in this embodiment, as a preferred implementation form, a first cavity 118 in the shape of a "mouth" is formed at the end of the front section 11 of each side rear floor longitudinal beam. The front ends of the upper plate 21 of the rear section of each side longitudinal beam, the lower plate 22 of the rear section of the longitudinal beam, and the cover plate 23 of the rear section of the longitudinal beam are arranged around the first cavity 118 on the same side, and each first cavity 118 communicates with the cavity of the rear section of the longitudinal beam on the same side.

[0058] The front ends of the upper plate 21 of the rear section of each side longitudinal beam, the lower plate 22 of the rear section of the longitudinal beam, and the cover plate 23 of the rear section of the longitudinal beam are arranged around the first cavity 118 on the same side, and each first cavity 118 communicates with the cavity of the rear section of the longitudinal beam on the same side, which is conducive to the sheet metal of the rear section 20 of the rear floor longitudinal beam being connected to the front section 11 of the rear floor longitudinal beam, and can increase the strength of the connection position between the front and rear sections of the rear floor.

[0059] It can be understood here that each cavity wall of the first cavity 118 substantially provides a lapping surface for the sheet metal such as the upper plate 21 of the rear section of the longitudinal beam on the same side, the lower plate 22 of the rear section of the longitudinal beam, and the cover plate 23 of the rear section of the longitudinal beam on the same side, which is more conducive to the connection between the front section 11 of the rear floor longitudinal beam and the rear section 20 of the rear floor longitudinal beam on the same side.

[0060] Secondly, during specific implementation, referring to Figure 9 and Figure 10 As shown in the figure, the cross-section of the upper plate 21 of the rear section of the longitudinal beam and the cross-section of the lower plate 22 of the rear section of the longitudinal beam can both be preferably set in the shape of an "L". The two are buckled to form a "U" - shaped structure with the opening facing the outside of the vehicle, and the cover plate 23 of the rear section of the longitudinal beam covers the opening.

[0061] In addition, in this embodiment, as a preferred implementation form, in combination with Figure 2 and Figure 11 As shown in the figure, the high - body rear structure further includes a front part 30 of the rear floor longitudinal beam respectively connected to the front ends of the front sections 11 of the rear floor longitudinal beams on each side. And, each front part 30 of the rear floor longitudinal beam includes an upper plate 31 of the front part of the longitudinal beam, a lower plate 32 of the front part of the longitudinal beam, and a rear section 33 of the sill beam that are buckled and connected together, and the upper plate 31 of the front part of the longitudinal beam, the lower plate 32 of the front part of the longitudinal beam, and the rear section 33 of the sill beam on each side enclose and form a cavity 34 of the front part of the longitudinal beam. The main advantage of such a setting is that it can increase the strength of the connection position between the middle and rear parts of the vehicle body, and together with the die - casting part 10, improve the stiffness of the C - ring position of the vehicle body.

[0062] During specific implementation, in this embodiment, as a preferred implementation form, a second cavity 119 in the shape of a "day" is formed at the end of the front end of each side rear floor longitudinal beam 11. The rear ends of the upper plate 31 of the front part of the longitudinal beam, the lower plate 32 of the front part of the longitudinal beam, and the rear section 33 of the sill beam on each side are arranged around the second cavity 119 on the same side, and each second cavity 119 communicates with the cavity 34 of the front part of the longitudinal beam on the same side.

[0063] The rear ends of the upper front plates 31 of the longitudinal beams on each side, the front parts of the longitudinal beams, and the rear sections 33 of the sill beams are arranged to surround the second cavity 119 on the same side, and the second cavity 119 on each side communicates with the cavity 34 of the front part of the longitudinal beam on the same side, which is conducive to the sheet metal of the front part 30 of the rear floor longitudinal beam being connected to the front section 11 of the rear floor longitudinal beam, and can increase the strength of the connection position between the front and rear sections of the rear floor.

[0064] Moreover, it can be understood that the walls of the second cavity 119 substantially provide a lapping surface for the sheet metals such as the upper front plate 31 of the longitudinal beam on the same side, the lower front plate 32 of the longitudinal beam, and the rear section 33 of the sill beam, which is more conducive to the connection between the front section 11 of the rear floor longitudinal beam and the front part 30 of the rear floor longitudinal beam on the same side.

[0065] In the specific structure of this embodiment, as Figure 12 shown, the cross-section of the rear section 33 of the sill beam can be preferably set in a "Ji" shape with the opening facing the outside of the vehicle to have better structural strength, and the cross-section of the lower front plate 32 of the longitudinal beam can be as Figure 14 shown, preferably set in an "L" shape. At this time, lower plate connecting flanges 321 connected to the upper front plate 31 of the longitudinal beam and the rear section 33 of the sill beam are respectively provided on both sides of the lower front plate 32 of the longitudinal beam, and the upper front plate 31 of the longitudinal beam can be as Figure 13 shown, preferably provided with a first upper plate flange 311 at the top and a second upper plate flange 312 at the bottom. The first upper plate flange 311 is connected to the top of the lower front plate 32 of the longitudinal beam, and the second upper plate flange 312 is connected to the top of the rear section 33 of the sill beam, which is conducive to the connection between the upper front plate 31 of the longitudinal beam, the lower front plate 32 of the longitudinal beam, and the rear section 33 of the sill beam. Moreover, an inclined abutting surface 322 can be formed at the front end of the lower front plate 32 of the longitudinal beam to facilitate abutting connection with the front cross beam 60 of the rear floor.

[0066] Meanwhile, the connection form between the upper front plate 31 of the longitudinal beam, the lower front plate 32 of the longitudinal beam, and the rear section 33 of the sill beam can be preferably welding, or a connection form combining FDS (Flow drill screw) connection and welding. At the same time, the connection between the upper front plate 31 of the longitudinal beam, the lower front plate 32 of the longitudinal beam, the rear section 33 of the sill beam and the front section 11 of the rear floor longitudinal beam (i.e., the walls of the second cavity 119) can be preferably FDS connection.

[0067] Combined with Figure 1 、 Figure 7 and Figure 8 shown, as a preferred implementation form, in this embodiment, a front panel 40 is connected between the front parts 30 of the rear floor longitudinal beams on both sides and the die-casting part 10, and a front lapping edge 16 connected to the front panel 40 is provided on the die-casting part 10, and a front cross beam 60 of the rear floor connected to the front panel 40 is connected between the front parts 30 of the rear floor longitudinal beams on both sides.

[0068] In this embodiment, also as a preferred implementation form, a rear panel 50 is connected between the rear sections 20 of the longitudinal beams on both sides of the rear floor and the die-cast part 10. A rear overlapping edge 17 for connecting with the rear panel 50 is provided on the die-cast part 10, and a rear floor rear cross beam 70 connected to the rear panel 50 is connected between the rear sections 20 of the longitudinal beams on both sides of the rear floor.

[0069] The main advantage of such a setting is that by providing an overlapping edge on the die-cast part 10, it is convenient to connect it with the panel. At the same time, the front cross beam 60 of the rear floor and the rear cross beam 70 of the rear floor can be used to better increase the structural strength of the rear part of the vehicle body.

[0070] In addition, in this embodiment, as a preferred implementation form, as Figure 2 shown, the rear floor cross beam includes a rear floor middle cross beam 12 and a rear floor upper cross beam 13 connected between the front sections 11 of the longitudinal beams on both sides of the rear floor, and the die-cast part 10 also has inner wheelhouse panels 14 respectively connected to the front sections 11 of the longitudinal beams on both sides of the rear floor.

[0071] So that the rear floor cross beam includes a rear floor middle cross beam 12 and a rear floor upper cross beam 13, and inner wheelhouse panels 14 are provided on the front sections 11 of the longitudinal beams of the rear floor, which can further reduce the number of rear floor parts, facilitate processing and preparation, and improve the structural strength.

[0072] During specific implementation, as a preferred implementation form, in this embodiment, in combination with Figures 4 to 6 shown, the cross sections of the front sections 11 of the longitudinal beams on both sides of the rear floor are both "E"-shaped openings towards the outside of the vehicle in the left-right direction of the whole vehicle, and longitudinal beam reinforcing ribs 114 arranged in the up-down direction of the whole vehicle are respectively provided in each front section 11 of the longitudinal beam of the rear floor.

[0073] Here, the cross sections of the front sections 11 of the longitudinal beams on both sides of the rear floor are both "E"-shaped, and in combination with the longitudinal beam reinforcing ribs 114 arranged in the up-down direction of the whole vehicle, each front section 11 of the longitudinal beam of the rear floor can have good bending resistance, which is beneficial to improving the overall strength of the rear floor frame structure.

[0074] It is worth mentioning that the cross section of the front section 11 of the above-mentioned longitudinal beam of the rear floor is "E"-shaped, not exactly like the strict letter "E", but refers to that its cross section is roughly "E"-shaped visually and has a shape trend adapted to peripheral structures such as the inner wheelhouse panel 14 and the rear floor upper cross beam.

[0075] Still as Figure 4 and Figure 6As shown, in the specific structure, the front section 11 of the rear floor longitudinal beam includes a front bottom wall 11a, a front top wall 11b, and an intermediate wall 11d that are arranged at intervals in the up-and-down direction of the whole vehicle, and a front side wall 11c that connects the front bottom wall 11a, the front top wall 11b, and the intermediate wall 11d. At this time, the tops of multiple longitudinal beam reinforcing ribs 114 are connected to the front top wall 11b, the bottoms of the multiple longitudinal beam reinforcing ribs 114 are connected to the front bottom wall 11a, and the inner sides of the multiple longitudinal beam reinforcing ribs 114 are connected to the front side wall 11c. At the same time, the multiple longitudinal beam reinforcing ribs 114 all cross the intermediate wall 11d to form a cross-shaped reinforcing rib. Moreover, the combined setting of the multiple longitudinal beam reinforcing ribs 114, the front bottom wall 11a, the front top wall 11b, the front side wall 11c, and the intermediate wall 11d also forms multiple box-like structures, which can effectively improve the structural strength of the front section 11 of the rear floor longitudinal beam.

[0076] In addition, in this embodiment, as a preferred implementation form, as Figure 2 shown, seat belt mounting points 111 are provided on both front sections 11 of the rear floor longitudinal beam to facilitate the layout and installation of seat belts. And, on the rear floor cross beam 12, there is a mounting boss 121 that protrudes forward in the front-rear direction of the whole vehicle, and a seat mounting point 122 is provided on the mounting boss 121 to facilitate seat installation.

[0077] During specific implementation, the mounting bosses 121 in this embodiment can be two arranged at intervals in the left-right direction of the whole vehicle, and a seat mounting point 122 is provided on each mounting boss 121, so as to improve the seat mounting stability. Of course, in addition to being set to two, the seat mounting points 122 in this embodiment can also be set and adjusted accordingly according to the actual seat installation requirements. For example, they can be three arranged at intervals in the left-right direction of the whole vehicle. Furthermore, when necessary, a reinforcing rib structure connected to the position of the seat mounting point 122 can be provided on the mounting boss 121 to further improve the structural strength of the position of the seat mounting point 122.

[0078] In this embodiment, as a preferred implementation form, refer to Figure 3 shown, subframe mounting points 112 and shock absorber spring mounting points 113 are respectively provided at the bottoms of the front sections 11 of the rear floor longitudinal beams on both sides, and rear shock absorber mounting points 141 are respectively provided on the inner plates 14 of the rear wheel housings on both sides.

[0079] It can be understood that the front section 11 of the rear floor longitudinal beam is provided with a seat belt mounting point 111, the mounting boss 121 of the middle cross beam of the rear floor is provided with a seat mounting point 122, the bottom parts of the front sections 11 of the two side rear floor longitudinal beams are respectively provided with a subframe mounting point 112 and a shock absorber spring mounting point 113, and the inner plates 14 of the two side rear wheel housings are respectively provided with a rear shock absorber mounting point 141. On the premise of using integrally formed die-castings, compared with the traditional technology, it can prevent the reduction of the structural strength of the positions of each mounting point caused by using too many connection points, thereby improving the mounting reliability of each mounting point.

[0080] In the specific structure of this embodiment, the number and arrangement form of the rear shock absorber mounting points 141 can be set and adjusted according to the actual mounting requirements of the rear shock absorber. For example, specifically, they can be Figure 3 the two arranged at intervals in the front-rear direction of the whole vehicle as shown in. Moreover, for the specific structures of the mounting points such as the seat belt mounting point 111, the seat mounting point 122, the subframe mounting point 112, the shock absorber spring mounting point 113 and the rear shock absorber mounting point 141 in this embodiment, the relevant structures in the body structure well-known to those skilled in the art can be referred to.

[0081] It is worth mentioning that in the specific structure, the longitudinal beam reinforcing ribs 114 in each front section 11 of the rear floor longitudinal beam are multiple and arranged at intervals in the front-rear direction of the whole vehicle, and longitudinal beam reinforcing ribs 114 are provided above both the subframe mounting point 112 and the shock absorber spring mounting point 113. Thus, the longitudinal beam reinforcing ribs 114 can be used to enhance the structural strength of the positions of each mounting point.

[0082] Secondly, in this embodiment, as a preferred implementation form, referring to Figure 3 and Figure 4 as shown, on the side of each side rear wheel housing inner plate 14 facing the outside of the vehicle, there are multiple wheel housing outer reinforcing ribs 142 arranged in the up-down direction of the whole vehicle. The wheel housing outer reinforcing ribs 142 are multiple and arranged at intervals in the front-rear direction of the whole vehicle, and some of the wheel housing outer reinforcing ribs 142 are connected to the position of the rear shock absorber mounting point 141, and some of the wheel housing outer reinforcing ribs 142 are arranged corresponding to the longitudinal beam reinforcing ribs 114 on the same side up and down.

[0083] At this time, referring to Figure 2 and Figure 5 as shown, on the side of each side rear wheel housing inner plate 14 facing the inside of the vehicle, there are multiple wheel housing inner reinforcing ribs 143 arranged in the up-down direction of the whole vehicle. The wheel housing inner reinforcing ribs 143 are multiple and arranged at intervals in the front-rear direction of the whole vehicle, and the bottom of each wheel housing inner reinforcing rib 143 is connected to the front section 11 of the rear floor longitudinal beam, and some of the wheel housing inner reinforcing ribs 143 are connected to the position of the rear shock absorber mounting point 141.

[0084] By cooperatively arranging the outer wheelhouse reinforcing rib 142 and the inner wheelhouse reinforcing rib 143, the structural strength of the rear wheelhouse inner panel 14 can be enhanced. At the same time, part of the outer wheelhouse reinforcing rib 142 is connected to the position of the rear shock absorber mounting point 141, part of the inner wheelhouse reinforcing rib 143 is connected to the position of the rear shock absorber mounting point 141, part of the outer wheelhouse reinforcing rib 142 is arranged corresponding to the longitudinal beam reinforcing rib 114 on the same side up and down, and the bottom of each inner wheelhouse reinforcing rib 143 is connected to the front section 11 of the rear floor longitudinal beam, which can also facilitate the structural strength of the position of the rear shock absorber mounting point 141 and the connection strength between the rear wheelhouse inner panel 14 and the longitudinal beam reinforcing rib 114 on the same side.

[0085] In this embodiment, during specific implementation, as a preferred implementation form, an inclined force transmission rib 144 connected to the position of the rear shock absorber mounting point 141 is provided on the side of each rear wheelhouse inner panel 14 facing away from the vehicle. The inclined force transmission rib 144 is connected to the outer wheelhouse reinforcing rib 142, thereby facilitating further enhancing the structural strength of the rear wheelhouse inner panel 14 and the position of the rear shock absorber mounting point 141.

[0086] Also as a preferred implementation form, in this embodiment, continue to refer to Figure 4 As shown, at the front end inside the front section 11 of each side's rear floor longitudinal beam, an inclined reinforcing rib 115 is provided, and the inclined reinforcing rib 115 forms a plurality of triangular frame structures inside the front section 11 of the rear floor longitudinal beam. The main advantage of such a setting is that the high stability of the triangular structure can be utilized to enhance the structural strength.

[0087] Of course, the specific number of the above-mentioned reinforcing ribs such as the outer wheelhouse reinforcing rib 142, the inner wheelhouse reinforcing rib 143, the inclined force transmission rib 144, and the inclined reinforcing rib 115 can be set and adjusted according to the actual strength requirements of the relevant structure. For example, at least one inclined force transmission rib 144 is connected to each of the two shock absorber mounting points, and adjacent two inclined force transmission ribs 144 are connected, etc.

[0088] In addition, in combination with Figure 3 and Figure 7 As shown, in this embodiment, as a preferred implementation form, a plurality of longitudinal beam lower force transmission ribs 116 extending in the front-rear direction of the vehicle are provided at the bottom of the front section 11 of each side's rear floor longitudinal beam. The rear end of the longitudinal beam lower force transmission rib 116 is connected to the position of the shock absorber spring mounting point 113, and the front end of the longitudinal beam lower force transmission rib 116 extends to the connection point between the front section 11 of the rear floor longitudinal beam and the rear floor middle cross beam 12.

[0089] Moreover, each side's front section 11 of the rear floor longitudinal beam has a corner position that arches upward in the up-down direction of the vehicle. The rear floor upper cross beam 13 is located between the two corner positions, and a cross rib 117 that cross-connects with the longitudinal beam lower force transmission rib 116 is provided at the bottom of the corner position.

[0090] The main advantages of such a setting are as follows. It is beneficial to improving the force transmission performance of the front section 11 of the rear floor longitudinal beam and the structural strength of the position of the shock-absorbing spring installation point 113. At the same time, the setting of the cross ribs 117 can further improve the structural strength of the corner position on the basis of the force transmission ribs 116 at the lower part of the longitudinal beam, thereby ensuring the structural performance of the front section 11 of the rear floor longitudinal beam.

[0091] During specific implementation, the quantity and layout form of the force transmission ribs 116 at the lower part of the longitudinal beam in this embodiment can also be set and adjusted accordingly according to the actual force transmission requirements of the front section 11 of the rear floor longitudinal beam. For example, it can be three arranged at intervals in the left-right direction of the whole vehicle, etc.

[0092] In addition, as a preferred implementation form, in combination with Figure 2 、 Figure 3 and Figure 7 as shown, in this embodiment, a beam cavity is formed at the bottom of at least one of the rear floor middle cross beam 12 and the rear floor upper cross beam 13. A beam reinforcing rib is provided in the beam cavity, and the beam reinforcing rib includes at least one of a cross rib 123 and a wavy reinforcing rib 131 extending in the left-right direction of the whole vehicle. In this way, the structural strength of each floor cross beam can be made better.

[0093] Of course, during specific implementation, different types of reinforcing ribs can be set according to the actual structural strengthening requirements of the rear floor cross beam. For example, cross ribs 123 and wavy reinforcing ribs 131 arranged at intervals in the front-rear direction of the whole vehicle are provided in the beam cavity of the rear floor middle cross beam 12, and wavy reinforcing ribs 131 are provided in the beam cavity of the rear floor upper cross beam 13, etc.

[0094] Also as a preferred implementation form, a skeleton panel 15 is formed on the die-casting part 10 of this embodiment and is connected between the front sections 11 of the rear floor longitudinal beams on both sides, as well as the rear floor middle cross beam 12 and the rear floor upper cross beam 13, and a number of raised ribs 151 are provided on the skeleton panel 15. By providing a number of raised ribs 151, the skeleton panel 15 can have good structural strength and load-bearing performance.

[0095] The raised ribs 151 here, during specific implementation, can adopt a similar structure to the above-mentioned cross ribs 123, so that a number of raised ribs 151 form a mesh-like strengthening structure, thereby obtaining a better structural strengthening effect. And when necessary in this embodiment, based on the strength requirements of the die-casting part 10, a reinforcing rib and other structures for enhancing the connection strength can also be provided between the skeleton panel 15 and the front sections 11 of the rear floor longitudinal beams on both sides, as well as between the rear floor middle cross beam 12 and the front sections 11 of the rear floor longitudinal beams on both sides. At the same time, in this embodiment, as a preferred implementation form, the die-casting part 10 is made of aluminum alloy. In this way, the weight of the rear floor skeleton structure can be effectively reduced, which is beneficial to the lightweight design of the whole vehicle.

[0096] In addition, as a preferred implementation form, referring back to Figure 1 as shown in , the outer rear wheel arch panels 80 are respectively connected to the inner rear wheel arch panels 14 on both sides. Specifically, the front end portion of the outer rear wheel arch panel 80 is connected to the rear section of the sill beam 33 by SPR (Self-Piercing Rivet), which is beneficial for connecting components of different materials, and the rear end of the outer rear wheel arch panel 80 can be connected to the rear section of the rear floor longitudinal beam 20 by welding.

[0097] The rear body structure of this embodiment can reduce the number of components, facilitate processing and manufacturing, and ensure processing accuracy. At the same time, it is also beneficial to improve the structural strength of the rear floor, so that the rear body structure of this vehicle has better stiffness, which helps to improve the vehicle's collision safety.

[0098] Embodiment Two

[0099] This embodiment relates to a vehicle, and the rear body structure in Embodiment One is provided in the vehicle body of this vehicle.

[0100] The vehicle of this embodiment, by setting the rear body structure in Embodiment One in the vehicle body, not only facilitates processing and manufacturing, ensures good processing quality, but also can improve the structural strength of the whole vehicle's rear part, effectively improving the safety quality of the whole vehicle.

[0101] 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 in the protection scope of the present invention.

Claims

1. A rear body structure, characterized in that: It includes an integrally formed die-cast part (10), and the die-cast part (10) has front sections (11) of rear floor longitudinal beams respectively arranged on the left and right sides, and a rear floor cross beam connected between the front sections (11) of the rear floor longitudinal beams on both sides; It further includes rear sections (20) of rear floor longitudinal beams respectively connected to the rear ends of the front sections (11) of the rear floor longitudinal beams on both sides. Each rear section (20) of the rear floor longitudinal beam is composed of a plurality of sheet metals connected by buckling, and a cavity of the rear section of the longitudinal beam is formed inside each rear section (20) of the rear floor longitudinal beam.

2. The rear body structure according to claim 1, characterized in that: The sheet metals that are connected to form each rear section (20) of the rear floor longitudinal beam all include an upper plate (21) of the rear section of the longitudinal beam and a lower plate (22) of the rear section of the longitudinal beam that are arranged opposite to each other up and down, and a cover plate (23) of the rear section of the longitudinal beam connected between the upper plate (21) of the rear section of the longitudinal beam and the lower plate (22) of the rear section of the longitudinal beam; The front ends of the upper plate (21) of the rear section of the longitudinal beam, the lower plate (22) of the rear section of the longitudinal beam, and the cover plate (23) of the rear section of the longitudinal beam on each side are all connected to the rear end of the front section (11) of the rear floor longitudinal beam on the same side.

3. The rear body structure according to claim 2, characterized in that: At the end of the rear end of the front section (11) of the rear floor longitudinal beam on each side, a first cavity (118) in the shape of a "mouth" is formed. The front ends of the upper plate (21) of the rear section of the longitudinal beam, the lower plate (22) of the rear section of the longitudinal beam, and the cover plate (23) of the rear section of the longitudinal beam on each side are arranged around the first cavity (118) on the same side, and the first cavity (118) on each side communicates with the cavity of the rear section of the longitudinal beam on the same side.

4. The rear body structure according to claim 1, characterized in that: It further includes front sections (30) of rear floor longitudinal beams respectively connected to the front ends of the front sections (11) of the rear floor longitudinal beams on each side; Each front section (30) of the rear floor longitudinal beam includes an upper plate (31) of the front section of the longitudinal beam, a lower plate (32) of the front section of the longitudinal beam, and a rear section (33) of the sill beam that are buckled and connected together, and an upper plate (31) of the front section of the longitudinal beam, a lower plate (32) of the front section of the longitudinal beam, and a rear section (33) of the sill beam on each side all enclose and form a cavity (34) of the front section of the longitudinal beam.

5. The rear body structure according to claim 4, characterized in that: At the end of the front end of the front section (11) of the rear floor longitudinal beam on each side, a second cavity (119) in the shape of a "day" is formed. The rear ends of the upper plate (31) of the front section of the longitudinal beam, the lower plate (32) of the front section of the longitudinal beam, and the rear section (33) of the sill beam on each side are arranged around the second cavity (119) on the same side, and the second cavity (119) on each side communicates with the cavity (34) of the front section of the longitudinal beam on the same side.

6. The rear body structure according to claim 4, characterized in that: A front panel (40) is connected between the front portions (30) of the rear floor longitudinal beams on both sides and the die casting (10), and a front lap edge (16) connected to the front panel (40) is provided on the die casting (10), and a rear floor front cross beam (60) connected to the front panel (40) is connected between the front portions (30) of the rear floor longitudinal beams on both sides; and / or, A rear panel (50) is connected between the rear sections (20) of the rear floor longitudinal beams on both sides and the die casting (10), and a rear lap edge (17) connected to the rear panel (50) is provided on the die casting (10), and a rear floor rear cross beam (70) connected to the rear panel (50) is connected between the rear sections (20) of the rear floor longitudinal beams on both sides.

7. The vehicle body rear structure according to any one of claims 1 to 6, characterized in that: The rear floor cross beam comprises a rear floor middle cross beam (12) and a rear floor upper cross beam (13) connected between the front sections (11) of the rear floor longitudinal beams on both sides, and the die casting (10) also comprises a rear wheel housing inner plate (14) respectively connected to the front sections (11) of the rear floor longitudinal beams on both sides.

8. The vehicle body rear structure according to claim 7, characterized in that: The cross-sections of the front sections (11) of the rear floor longitudinal beams on both sides are both "E"-shaped and open toward one side outside the vehicle along the left-right direction of the vehicle, and longitudinal beam reinforcement ribs (114) arranged along the up-down direction of the vehicle are respectively provided in the front sections (11) of the rear floor longitudinal beams; and / or, Safety belt mounting points (111) are provided on the front sections (11) of the rear floor longitudinal beams on both sides, and mounting bosses (121) protruding forward along the front-rear direction of the vehicle are provided on the rear floor middle cross beam (12), and seat mounting points (122) are provided on the mounting bosses (121).

9. The vehicle body rear structure according to claim 7, characterized in that: A subframe mounting point (112) and a shock-absorbing spring mounting point (113) are respectively provided at the bottom of the front section (11) of the rear floor longitudinal beam on both sides, and a rear shock-absorbing mounting point (141) is respectively provided on the inner plate (14) of the rear wheel housing on both sides; and / or, The rear wheel cover inner plates (14) on both sides are respectively connected to rear wheel cover outer plates (80).

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

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