Vehicle rear body structure, and vehicle

Abstract

A vehicle rear body structure, comprising a roof rear cross beam (1), a left side wall frame (2), a right side wall frame (3), a coat rack (4) and a rear floor upper cross beam (5), wherein the coat rack (4) comprises a coat rack body (41), a coat rack front cross beam (42) connected to a front side of the coat rack body (41), and a coat rack rear cross beam (43) connected to a rear side of the coat rack body (41); the roof rear cross beam (1) is located in front of the coat rack rear cross beam (43); the coat rack (4) is located between the roof rear cross beam (1) and the rear floor upper cross beam (5) in a height direction of the vehicle; the roof rear cross beam (1) is connected between an upper side of the left side wall frame (2) and an upper side of the right side wall frame (3); the coat rack front cross beam (42) is connected between the left side wall frame (2) and the right side wall frame (3); the coat rack rear cross beam (43) is connected between a rear side of the left side wall frame (2) and a rear side of the right side wall frame (3); the rear floor upper cross beam (5) is connected between a lower side of the left side wall frame (2) and a lower side of the right side wall frame (3); the roof rear cross beam (1), the left side wall frame (2), the coat rack rear cross beam (43) and the right side wall frame (3) are sequentially connected to form a first annular force transmission frame (R1); the coat rack front cross beam (42), the left side wall frame (2), the coat rack rear cross beam (43) and the right side wall frame (3) are sequentially connected to form a second annular force transmission frame (R2); the roof rear cross beam (1), the left side wall frame (2), the coat rack front cross beam (42) and the right side wall frame (3) are sequentially connected to form a third annular force transmission frame (R3); and the coat rack front cross beam (42), the left side wall frame (2), the floor upper cross beam (5) and the right side wall frame (3) are sequentially connected to form a fourth annular force transmission frame (R4). All the annular force transmission frames of the vehicle rear body structure are connected to each other to form a vehicle rear body structure having a continuous transmission path of a plurality of annular force transmission frames, so that the bending, torsional rigidity and modality of the vehicle are improved. Further disclosed is a vehicle.

Description

Rear body structure and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 14, 2023, with application number 202322509360.1 and application name “Rear body structure and vehicle”, and the Chinese patent application filed with the China Patent Office on September 14, 2023, with application number 202311191745.6 and application name “Rear body structure and vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the technical field of vehicle bodies, and in particular relates to a rear vehicle body structure and a vehicle. Background Art

[0003] In the existing rear body frame, a vertical annular force transmission frame structure is generally constructed only at the C-pillar and / or D-pillar position. The annular force transmission frames are few and discontinuous, resulting in poor bending and torsional stiffness of the entire vehicle and low modality.

[0004] Summary of the Invention

[0005] The technical problem to be solved by the present application is to provide a vehicle body rear structure and a vehicle in view of the problem that the existing vehicle body rear frame has poor bending stiffness and torsional stiffness of the whole vehicle.

[0006] To solve the above technical problems, on the one hand, an embodiment of the present application provides a vehicle body rear structure, including a roof rear crossbeam, a left side perimeter frame, a right side perimeter frame, a coat rack, and a rear floor crossbeam, wherein the coat rack includes a coat rack body, a coat rack front crossbeam connected to the front side of the coat rack body, and a coat rack rear crossbeam connected to the rear side of the coat rack body, the roof rear crossbeam is located in front of the coat rack rear crossbeam, and the coat rack is located between the roof rear crossbeam and the rear floor crossbeam in the vehicle height direction;

[0007] The rear crossbeam of the top cover is connected between the upper side of the left side frame and the upper side of the right side frame, the front crossbeam of the coat rack is connected between the left side frame and the right side frame, the rear crossbeam of the coat rack is connected between the rear side of the left side frame and the rear side of the right side frame, and the crossbeam on the rear floor is connected between the lower side of the left side frame and the lower side of the right side frame;

[0008] The rear crossbeam of the top cover, the left side surrounding frame, the rear crossbeam of the coat rack and the right side surrounding frame are connected in sequence to form a first annular force transmission frame; the front crossbeam of the coat rack, the left side surrounding frame, the rear crossbeam of the coat rack and the right side surrounding frame are connected in sequence to form a second annular force transmission frame; the rear crossbeam of the top cover, the left side surrounding frame, the front crossbeam of the coat rack and the right side surrounding frame are connected in sequence to form a third annular force transmission frame; the front crossbeam of the coat rack, the left side surrounding frame, the crossbeam on the floor and the right side surrounding frame are connected in sequence to form a fourth annular force transmission frame.

[0009] Optionally, the left side frame includes a first left side frame pillar, a second left side frame pillar, a left wheel cover assembly, and a left upper side rail connected to the upper ends of the first left side frame pillar and the second left side frame pillar; the right side frame includes a first right side frame pillar, a second right side frame pillar, a right wheel cover assembly, and a right upper side rail connected to the upper ends of the first right side frame pillar and the second right side frame pillar; the left wheel cover assembly is connected to the lower end of the second left side frame pillar, and the right wheel cover assembly is connected to the lower end of the second right side frame pillar;

[0010] The left upper side beam comprises a left upper side beam front section and a left upper side beam rear section, and the right upper side beam comprises a right upper side beam front section and a right upper side beam rear section.

[0011] Optionally, the roof rear crossbeam is connected between the front end of the rear section of the left upper side beam and the front end of the rear section of the right upper side beam, the coat rack front crossbeam is connected between the upper side of the left wheel house assembly and the upper side of the right wheel house assembly, the coat rack rear crossbeam is connected between the rear end of the rear section of the left upper side beam and the rear end of the rear section of the right upper side beam, and the rear floor upper crossbeam is connected between the lower side of the left wheel house assembly and the lower side of the right wheel house assembly;

[0012] The rear crossbeam of the roof, the rear section of the left upper side beam, the rear crossbeam of the coat rack and the rear section of the right upper side beam are connected in sequence to form the first annular force transmission frame; the front crossbeam of the coat rack, the second column on the left side, the rear crossbeam of the coat rack and the second column on the right side are connected in sequence to form the second annular force transmission frame; the rear crossbeam of the roof, the second column on the left side, the front crossbeam of the coat rack and the second column on the right side are connected in sequence to form the third annular force transmission frame; the front crossbeam of the coat rack, the left wheelhouse assembly, the crossbeam on the floor and the right wheelhouse assembly are connected in sequence to form the fourth annular force transmission frame.

[0013] Optionally, the left wheelhouse assembly includes a left wheelhouse and a left wheelhouse column connected to the inner side of the left wheelhouse, and the right wheelhouse assembly includes a right wheelhouse and a right wheelhouse column connected to the inner side of the right wheelhouse; the front crossbeam of the coat rack is connected between the upper end of the left wheelhouse column and the upper end of the right wheelhouse column, and the crossbeam on the floor is connected between the lower end of the left wheelhouse column and the lower end of the right wheelhouse column;

[0014] The front crossbeam of the coat rack, the left wheel house column, the crossbeam on the floor and the right wheel house column are connected in sequence to form the fourth annular force transmission frame.

[0015] Optionally, the floor crossbeam includes a floor crossbeam body, a first connecting member and a second connecting member, the floor crossbeam body is connected between the left wheel house and the right wheel house, the first connecting member is connected between the left end of the floor crossbeam body and the lower end of the left wheel house column, and the second connecting member is connected between the right end of the floor crossbeam body and the lower end of the right wheel house column.

[0016] Optionally, a first crossbeam extends from the upper end of the left wheelhouse column toward the front crossbeam of the coat rack, and the first crossbeam is connected to the left end of the front crossbeam of the coat rack;

[0017] A second crossbeam extends from the upper end of the right wheelhouse column toward the front crossbeam of the coat rack, and the second crossbeam is connected to the right end of the front crossbeam of the coat rack.

[0018] Optionally, a first window is provided between the first left side column and the second left side column; and further comprising a first longitudinal beam, the first longitudinal beam being connected between the first left side column and the second left side column and spanning the first window;

[0019] A second window is provided between the first upright column of the right side enclosure and the second upright column of the right side enclosure; and a second longitudinal beam is also provided, the second longitudinal beam being connected between the second upright column of the left side enclosure and the second upright column of the right side enclosure and spanning the second window.

[0020] Optionally, it also includes a front crossbeam of the roof cover, which is connected between the front section of the left upper side beam and the front section of the right upper side beam. The front crossbeam of the roof cover, the left upper side beam, the rear crossbeam of the roof cover and the right upper side beam enclose an installation area.

[0021] Optionally, the front crossbeam of the roof, the left upper side beam, the right upper side beam, the rear crossbeam of the clothes rack and the rear crossbeam of the roof constitute a fifth annular force transmission frame.

[0022] Optionally, the rear crossbeam of the top cover, the second upright column on the left side, the crossbeam on the floor, the second upright column on the right side and the front crossbeam of the clothes rack constitute a sixth annular force transmission frame.

[0023] Optionally, the clothes rack body is stepped, and the clothes rack body includes a front side panel, a first top panel, a middle side panel and a second top panel, the first top panel is connected between the upper side of the front side panel and the lower side of the middle side panel, the front side of the second top panel is connected to the upper side of the middle side panel, the front crossbeam of the clothes rack is connected to the rear side of the front side panel and the lower side of the first top panel, and the rear crossbeam of the clothes rack is connected to the rear side of the second top panel.

[0024] In the rear vehicle body structure of the embodiment of the present application, the rear crossbeam of the roof, the left side surrounding frame, the rear crossbeam of the coat rack and the right side surrounding frame are connected in sequence to form a first annular force transmission frame, the front crossbeam of the coat rack, the left side surrounding frame, the rear crossbeam of the coat rack and the right side surrounding frame are connected in sequence to form a second annular force transmission frame, the rear crossbeam of the roof, the left side surrounding frame, the front crossbeam of the coat rack and the right side surrounding frame are connected in sequence to form a third annular force transmission frame, and the front crossbeam of the coat rack, the left side surrounding frame, the crossbeam on the floor and the right side surrounding frame are connected in sequence to form a fourth annular force transmission frame. The first annular force transmission frame and the second annular force transmission frame intersect at the rear crossbeam of the clothes rack, the first annular force transmission frame and the third annular force transmission frame intersect at the rear crossbeam of the top cover, the second annular force transmission frame, the third annular force transmission frame and the fourth annular force transmission frame intersect at the front crossbeam of the clothes rack, and all the annular force transmission frames are connected to form a rear vehicle body structure with a continuous transmission path of multiple annular force transmission frames, which greatly improves the bending, torsional stiffness and modal of the whole vehicle, can fully decompose and absorb the excitation generated by the rear shock absorber, effectively reduce the noise and vibration of the rear vehicle body, improve ride comfort, and quickly respond to the chassis handling stability performance.

[0025] Based on simulation analysis, the vehicle adopting the rear body structure of the present application has significantly improved bending stiffness, torsional stiffness and modal properties compared to a vehicle of the same level. The torsional stiffness reaches 25,600 Nm / °, the performance is improved by 25%, the bending stiffness performance is improved by 20%, the NVH performance is improved by 50%, the modal properties are improved by 10%, the stiffness of the subframe mounting point is improved by 20%, the body weight is reduced by approximately 10 kg, and the cost is saved by approximately 200 yuan.

[0026] In addition, in terms of safety, with only two front and rear roof crossbeams (front roof crossbeam and rear roof crossbeam), it can meet the CIASI requirements of excellent (G) for top pressure, side impact, and small offset impact performance.

[0027] On the other hand, an embodiment of the present application further provides a vehicle comprising the aforementioned rear vehicle body structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of a rear vehicle body structure provided by an embodiment of the present application;

[0029] FIG2 is a schematic diagram of a left side frame of a vehicle body rear structure provided by an embodiment of the present application;

[0030] FIG3 is a schematic diagram of a right side frame of a vehicle body rear structure provided by an embodiment of the present application;

[0031] FIG4 is a schematic diagram of a coat rack of a vehicle body rear structure provided by an embodiment of the present application;

[0032] FIG5 is a schematic diagram of a rear cross beam of a roof of a rear vehicle body structure provided by an embodiment of the present application;

[0033] FIG6 is a schematic diagram of a front cross beam of a roof of a rear vehicle body structure provided by an embodiment of the present application;

[0034] FIG7 is a schematic diagram of a crossbeam on the floor of a vehicle body rear structure provided by an embodiment of the present application.

[0035] The accompanying drawings in the specification are denoted as follows: R1, first annular force transmission frame; R2, second annular force transmission frame; R3, third annular force transmission frame; R4, fourth annular force transmission frame; D, installation area; 1, rear cross member of roof; 2, left side panel frame; 21, first upright column of left side panel; 22, second upright column of left side panel; 23, left wheelhouse assembly; 231, left wheelhouse; 24, left upper side beam; 241, front section of left upper side beam; 242, rear section of left upper side beam; 25, first window; 26, first longitudinal beam; 3, right side panel frame; 31, first upright column of right side panel; 32, second upright column of right side panel; 33, right wheelhouse assembly; 331, right wheelhouse; 332, right wheelhouse upright column; 3321, second cross member; 34, right upper side beam; 341, front section of right upper side beam; 342, rear section of right upper side beam; 35, second window; 36, second longitudinal beam; 4. Coat rack; 41. Coat rack body; 411. Front side panel; 412. First top panel; 413. Middle side panel; 414. Second top panel; 42. Front crossbeam of coat rack; 43. Rear crossbeam of coat rack; 5. Crossbeam on rear floor; 51. Crossbeam body on floor; 52. First connecting piece; 53. Second connecting piece; 6. Front crossbeam of top cover. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects solved by this application more clearly understood, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0037] In this article, front, back, left, right, up, and down refer to the vehicle's horizontal position. Vehicle width refers to the left-right direction (Y direction), vehicle height refers to the up-down direction (Z direction), and vehicle length refers to the front-back direction (X direction).

[0038] Referring to Figures 1 to 7, the rear vehicle body structure provided in an embodiment of the present application includes a roof rear cross beam 1, a left side surrounding frame 2, a right side surrounding frame 3, a clothes rack 4 and a rear floor upper cross beam 5. The clothes rack 4 includes a clothes rack main body 41, a clothes rack front cross beam 42 connected to the front side of the clothes rack main body 41, and a clothes rack rear cross beam 43 connected to the rear side of the clothes rack main body 41. The roof rear cross beam 1 is located in front of the clothes rack rear cross beam 43, and the clothes rack 4 is located between the roof rear cross beam 1 and the rear floor upper cross beam 5 in the vehicle height direction.

[0039] The roof rear crossbeam 1 is connected between the upper sides of the left side frame 2 and the upper sides of the right side frame 3. The coat rack front crossbeam 42 is connected between the left side frame 2 and the right side frame 3. The coat rack rear crossbeam 43 is connected between the rear sides of the left side frame 2 and the rear sides of the right side frame 3. The rear floor upper crossbeam 5 is connected between the lower sides of the left side frame 2 and the lower sides of the right side frame 3. The rear floor upper crossbeam 5 is suitable for being welded to the rear floor.

[0040] 1 , the top cover rear crossbeam 1, the left side surrounding frame 2, the coat rack rear crossbeam 43 and the right side surrounding frame 3 are connected in sequence to form a first annular force transmission frame R1; the coat rack front crossbeam 42, the left side surrounding frame 2, the coat rack rear crossbeam 43 and the right side surrounding frame 3 are connected in sequence to form a second annular force transmission frame R2; the top cover rear crossbeam 1, the left side surrounding frame 2, the coat rack front crossbeam 42 and the right side surrounding frame 3 are connected in sequence to form a third annular force transmission frame R3; the coat rack front crossbeam 42, the left side surrounding frame 2, the floor upper crossbeam 5 and the right side surrounding frame 3 are connected in sequence to form a fourth annular force transmission frame R4.

[0041] The first annular force transmission frame R1 gradually tilts downward from front to back, playing a role in Z-axis anti-sway.

[0042] The second annular force transmission frame R2 is roughly parallel to the horizontal plane or forms a small angle with the horizontal plane, and plays a role in Z-axis anti-sway.

[0043] The third annular force transmission frame R3 is roughly parallel to the vertical plane or forms a small angle with the vertical plane, and plays a role in resisting torsion in the Y direction.

[0044] The fourth annular force transmission frame R4 is substantially parallel to the vertical plane or forms a small angle with the vertical plane.

[0045] In one embodiment, referring to Figures 1 to 3, the left side frame 2 includes a left side first pillar 21, a left side second pillar 22, a left wheel cover assembly 23 and a left upper side beam 24 connected to the upper ends of the left side first pillar 21 and the left side second pillar 22; the right side frame 3 includes a right side first pillar 31, a right side second pillar 32, a right wheel cover assembly 33 and a right upper side beam 34 connected to the upper ends of the right side first pillar 31 and the right side second pillar 32; the left wheel cover assembly 23 is connected to the lower end of the left side second pillar 22, and the right wheel cover assembly 33 is connected to the lower end of the right side second pillar 32; the left upper side beam 24 has a left upper side beam front section 241 and a left upper side beam rear section 242, and the right upper side beam 34 has a right upper side beam front section 341 and a right upper side beam rear section 342.

[0046] In one embodiment, referring to Figures 1 to 3, the rear cross beam 1 of the roof is connected between the front end of the left upper side beam rear section 242 and the front end of the right upper side beam rear section 342, the front cross beam 42 of the clothes rack is connected between the upper side of the left wheel house assembly 23 and the upper side of the right wheel house assembly 33, the rear cross beam 43 of the clothes rack is connected between the rear end of the left upper side beam rear section 242 and the rear end of the right upper side beam rear section 342, and the upper cross beam 5 on the rear floor is connected between the lower side of the left wheel house assembly 23 and the lower side of the right wheel house assembly 33. In this way, the rear crossbeam 1 of the roof, the rear section 242 of the left upper side beam, the rear crossbeam 43 of the coat rack and the rear section 342 of the right upper side beam are connected in sequence to form the first annular force transmission frame R1; the front crossbeam 42 of the coat rack, the second column 22 on the left side, the rear crossbeam 43 of the coat rack and the second column 32 on the right side are connected in sequence to form the second annular force transmission frame; the rear crossbeam 1 of the roof, the second column 22 on the left side, the front crossbeam 32 of the coat rack and the second column 32 on the right side are connected in sequence to form the third annular force transmission frame R3; the front crossbeam 42 of the coat rack, the left wheelhouse assembly 23, the crossbeam 5 on the floor and the right wheelhouse assembly 24 are connected in sequence to form the fourth annular force transmission frame R4.

[0047] In one embodiment, referring to Figures 1 to 3, the left wheel cover assembly 23 includes a left wheel cover 231 and a left wheel cover column (not visible in the figures) connected to the inner side of the left wheel cover 231, and the right wheel cover assembly 33 includes a right wheel cover 331 and a right wheel cover column 332 connected to the inner side of the right wheel cover 331; the clothes rack front crossbeam 42 is connected between the upper end of the left wheel cover column and the upper end of the right wheel cover column 332, and the floor crossbeam 5 is connected between the lower end of the left wheel cover column and the lower end of the right wheel cover column 332; the clothes rack front crossbeam 42, the left wheel cover column, the floor crossbeam 5 and the right wheel cover column 332 are connected in sequence to form the fourth annular force transmission frame R4. The left wheelhouse pillar is a reinforcement for the left wheelhouse 231. Thus, when the left wheelhouse 231 collides, the impact force is transmitted through the left wheelhouse pillar to the fourth annular force transmission frame R4, which then dissipates from the fourth annular force transmission frame R4 to the first annular force transmission frame R1, the second annular force transmission frame R2, and the first annular force transmission frame R3. This evenly distributes the force across the entire rear of the vehicle body, preventing excessive intrusion into the passenger compartment. The right wheelhouse pillar 332 is a reinforcement for the left wheelhouse 331. Thus, when the right wheelhouse 331 collides, the impact force is transmitted through the right wheelhouse pillar 332 to the fourth annular force transmission frame R4, which then dissipates from the fourth annular force transmission frame R4 to the first annular force transmission frame R1, the second annular force transmission frame R2, and the first annular force transmission frame R3. This evenly distributes the force across the entire rear of the vehicle body, preventing excessive intrusion into the passenger compartment.

[0048] In one embodiment, referring to Figures 1 and 7 , the floor cross member 5 includes a floor cross member body 51, a first connector 52, and a second connector 53. The floor cross member body 51 is connected between the left wheelhouse 231 and the right wheelhouse 331. The first connector 52 is connected between the left end of the floor cross member body 51 and the lower end of the left wheelhouse column. The second connector 53 is connected between the right end of the floor cross member body 51 and the lower end of the right wheelhouse column 332. This increases the connection area between the floor cross member 5 and the left wheelhouse assembly 23 and the connection area between the floor cross member 5 and the right wheelhouse assembly 33, thereby increasing the connection strength between the floor cross member 5 and the left and right wheelhouse assemblies 23 and 33.

[0049] In one embodiment, a first crossbeam (not visible in the figure) extends from the upper end of the left wheelhouse column toward the coat rack front crossbeam 42, and the first crossbeam is connected to the left end of the coat rack front crossbeam 42. Referring to Figures 1 and 3, a second crossbeam 3321 extends from the upper end of the right wheelhouse column 332 toward the coat rack front crossbeam 42, and the second crossbeam 3321 is connected to the right end of the coat rack front crossbeam 42.

[0050] In one embodiment, referring to Figures 1 and 2 , a first window 25 (commonly referred to as a triangular window) is provided between the first left side panel pillar 21 and the second left side panel pillar 22. A first longitudinal beam 26 is also provided. The first longitudinal beam 26 is connected between the first left side panel pillar 21 and the second left side panel pillar 22 and spans the first window 25. The first longitudinal beam 26 strengthens the first window 25 and thereby enhances the strength of the left side panel frame 2.

[0051] In one embodiment, as shown in FIG3 , a second window 35 is provided between the right side first column 31 and the right side second column 32. A second longitudinal beam 36 is also provided. The second longitudinal beam 36 is connected between the left side second column 31 and the right side second column 32 and spans the second window 35. The second longitudinal beam 36 strengthens the second window 35 and enhances the strength of the right side frame 3.

[0052] In one embodiment, referring to FIG1 , a roof front crossbeam 6 is further included, connected between the left upper side rail front section 241 and the right upper side rail front section 341. The roof front crossbeam 6, the left upper side rail 24, the roof rear crossbeam 1, and the right upper side rail 34 enclose an installation area D suitable for installing a panoramic skylight. This allows for a panoramic skylight configuration with a larger skylight opening, a wide field of view, and a better user experience.

[0053] In one embodiment, referring to FIG. 5, the rear roof crossmember 1 is a beam with a closed cross-section, and the interior of the rear roof crossmember 1 has a cavity. Compared with the existing open-type roof crossmember, it has greater stiffness and strength and is not easily bent during a collision. Both ends of the rear roof crossmember 1 in the length direction have flanges for welding with the left upper side beam 24 and the right upper side beam 34.

[0054] In one embodiment, referring to FIG. 6, the front roof crossmember 6 is a beam with a closed cross-section, and the interior of the front roof crossmember 6 has a cavity. Compared with the existing open-type roof crossmember, it has greater stiffness and strength and is not easily bent during a collision. Both ends of the front roof crossmember 6 in the length direction have flanges for welding with the left upper side beam 24 and the right upper side beam 34.

[0055] In one embodiment, referring to FIG. 1, the front roof crossmember 6, the left upper side beam 24, the right upper side beam 34, the rear衣帽架 crossmember 43 and the rear roof crossmember 1 form a fifth annular force transmission frame R5. The fifth annular force transmission frame R5 is in the shape of a "day" character and plays a role in resisting bending and torsion in the X, Y, and Z directions.

[0056] In one embodiment, referring to FIG. 1, the rear roof crossmember 1 is located behind the second row of seats in the X direction, so that the rear roof crossmember 1 is far from the heads of the second row of occupants, and the head space of the second row of occupants is sufficient, and the riding comfort is high.

[0057] In one embodiment, referring to FIG. 1, the rear roof crossmember 1, the left side围 second pillar 22, the floor upper crossmember 5, the right side围 second pillar 32 and the front衣帽架 crossmember 42 form a sixth annular force transmission frame R6. The sixth annular force transmission frame R6 is in the shape of a "day" character and plays a role in resisting torsion in the Y direction.

[0058] In one embodiment, referring to FIG. 4, the衣帽架 main body 41 is in a stepped shape. The衣帽架 main body 41 includes a front side plate 411, a first top plate 412, a middle side plate 413 and a second top plate 414. The first top plate 412 is connected between the upper side of the front side plate 411 and the lower side of the middle side plate 413. The front side of the second top plate 414 is connected to the upper side of the middle side plate 413. The front衣帽架 crossmember 42 is connected to the rear side of the front side plate 411 and the lower side of the first top plate 412. The rear衣帽架 crossmember 43 is connected to the rear side of the second top plate 414. The width of the second top plate 414 is larger and is used for placing items. The front衣帽架 crossmember 42 is arranged behind the front side plate 411 of the衣帽架 main body 41 to avoid occupying the space of the occupant compartment.

[0059] Of course, in some embodiments, the front side plate 411 and the first top plate 412 may also be part of the front衣帽架 crossmember 42.

[0060] The rear vehicle body structure of the embodiment of the present application, the left side frame 2, the right side frame 3, the clothes rack 4, and the cross beam 5 on the floor are assembled into a vehicle body frame sub-assembly through welding, screwing, structural adhesive and other connection methods. This vehicle body frame sub-assembly is then assembled with the rear cross beam 1 and the front cross beam 6 of the top cover through welding and screwing to form the rear vehicle body structure.

[0061] The rear vehicle body structure of the embodiment of the present application, as shown in FIG1 , has seven node points on the left side frame, namely, the first node P1, the second node P2, the third node P3, the fourth node P4, the fifth node P5, and the sixth node P7. The first node P1 is the connection point between the left side first column 21 and the left upper side rail 24, the second node P2 is the connection point between the left side first column 21 and the first longitudinal beam 26, the third node P3 is the connection point between the rear floor crossbeam and the left wheelhouse assembly 23, the fourth node P4 is the connection point between the roof rear crossbeam 1 and the left upper side rail 24, the fifth node P5 is the connection point between the left side second column 22 and the second longitudinal beam 26, the sixth node P6 is the connection point between the coat rack front crossbeam 42 and the right side second column 22, and the seventh node P7 is the connection point between the coat rack rear crossbeam 43 and the left upper side rail 24. The right side frame 3 also has seven node points, and the seven nodes on the right side frame 3 are arranged symmetrically with the seven nodes on the left side frame 2.

[0062] Welded joints are used at each node to strengthen the entire rear body structure and enhance its overall structural stability. A joint is a process where two components are welded together, either by lap welding or nested welding, with the corresponding beam having an internal cavity (force-transmitting cavity).

[0063] In the rear structure of the vehicle body of the embodiment of the present application, the first annular force transmission frame R1 and the second annular force transmission frame R2 intersect at the rear crossbeam 43 of the coat rack (the rear crossbeam 43 of the coat rack is a common component of the first annular force transmission frame R1 and the second annular force transmission frame R2), the first annular force transmission frame R1 and the third annular force transmission frame R3 intersect at the rear crossbeam 1 of the top cover (the rear crossbeam 1 of the top cover is a common component of the first annular force transmission frame R1 and the third annular force transmission frame R3), the second annular force transmission frame R2, the third annular force transmission frame R3 and the fourth annular force transmission frame R1 intersect at the rear crossbeam 1 of the top cover (the rear crossbeam 1 of the top cover is a common component of the first annular force transmission frame R1 and the third annular force transmission frame R3). The force transmission frame R4 intersects with the front cross beam 42 of the coat rack (the front cross beam 42 of the coat rack is a common component of the second annular force transmission frame R2, the third annular force transmission frame R3, and the fourth annular force transmission frame R4). All the annular force transmission frames are connected to each other to form a rear vehicle body structure with a continuous transmission path of multiple annular force transmission frames, which greatly improves the bending, torsional stiffness and modal of the entire vehicle, can fully decompose and absorb the excitation generated by the rear shock absorber, effectively reduce the noise and vibration of the rear vehicle body, improve ride comfort, and quickly respond to the chassis's handling stability.

[0064] Based on simulation analysis, a vehicle adopting the rear body structure of the embodiment of the present application has significantly improved bending stiffness, torsional stiffness and modal properties compared to a vehicle of the same level. The torsional stiffness reaches 25,600 Nm / °, with a performance improvement of 25%, a bending stiffness performance improvement of 20%, a NVH performance improvement of 50%, a modal improvement of 10%, a subframe mounting point stiffness improvement of 20%, a body weight reduction of approximately 10 kg, and a cost saving of approximately RMB 200.

[0065] In addition, in terms of safety, with only two front and rear roof crossbeams (front roof crossbeam 6 and rear roof crossbeam 1), it can meet the CIASI requirements of excellent (G) for top pressure, side impact, and small offset impact performance.

[0066] In addition, an embodiment of the present application also provides a vehicle, which includes the rear vehicle body structure of the above embodiment.

[0067] In one embodiment, the vehicle is a car, in particular a car with a large-sized panoramic sunroof.

[0068] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A vehicle body rear structure, characterized in that: It includes a roof rear cross beam, a left side surrounding frame, a right side surrounding frame, a coat rack and a cross beam on the rear floor, the coat rack includes a coat rack body, a coat rack front cross beam connected to the front side of the coat rack body and a coat rack rear cross beam connected to the rear side of the coat rack body, the roof rear cross beam is located in front of the coat rack rear cross beam, and the coat rack is located between the roof rear cross beam and the cross beam on the rear floor in the vehicle height direction; The rear cross beam of the top cover is connected between the upper side of the left side frame and the upper side of the right side frame, the front cross beam of the coat rack is connected between the left side frame and the right side frame, the rear cross beam of the coat rack is connected between the rear side of the left side frame and the rear side of the right side frame, and the upper cross beam of the rear floor is connected between the lower side of the left side frame and the lower side of the right side frame; The rear crossbeam of the top cover, the left side surrounding frame, the rear crossbeam of the coat rack and the right side surrounding frame are connected in sequence to form a first annular force transmission frame; the front crossbeam of the coat rack, the left side surrounding frame, the rear crossbeam of the coat rack and the right side surrounding frame are connected in sequence to form a second annular force transmission frame; the rear crossbeam of the top cover, the left side surrounding frame, the front crossbeam of the coat rack and the right side surrounding frame are connected in sequence to form a third annular force transmission frame; the front crossbeam of the coat rack, the left side surrounding frame, the crossbeam on the floor and the right side surrounding frame are connected in sequence to form a fourth annular force transmission frame.

2. The vehicle body rear structure according to claim 1, characterized in that: The left side frame includes a first left side frame column, a second left side frame column, a left wheel cover assembly, and a left upper side beam connected to the upper ends of the first left side frame column and the second left side frame column; the right side frame includes a first right side frame column, a second right side frame column, a right wheel cover assembly, and a right upper side beam connected to the upper ends of the first right side frame column and the second right side frame column; the left wheel cover assembly is connected to the lower end of the second left side frame column, and the right wheel cover assembly is connected to the lower end of the second right side frame column; The left upper side beam comprises a left upper side beam front section and a left upper side beam rear section, and the right upper side beam comprises a right upper side beam front section and a right upper side beam rear section.

3. The vehicle body rear structure according to claim 2, characterized in that: The rear cross beam of the top cover is connected between the front end of the rear section of the left upper side beam and the front end of the rear section of the right upper side beam, the front cross beam of the coat rack is connected between the upper side of the left wheel housing assembly and the upper side of the right wheel housing assembly, the rear cross beam of the coat rack is connected between the rear end of the rear section of the left upper side beam and the rear end of the rear section of the right upper side beam, and the upper cross beam of the rear floor is connected between the lower side of the left wheel housing assembly and the lower side of the right wheel housing assembly; The rear crossbeam of the top cover, the rear section of the left upper side beam, the rear crossbeam of the coat rack and the rear section of the right upper side beam are connected in sequence to form the first annular force transmission frame; the front crossbeam of the coat rack, the second column on the left side, the rear crossbeam of the coat rack and the second column on the right side are connected in sequence to form the second annular force transmission frame; the rear crossbeam of the top cover, the second column on the left side, the front crossbeam of the coat rack and the second column on the right side are connected in sequence to form the third annular force transmission frame; the front crossbeam of the coat rack, the left wheel cover assembly, the crossbeam on the floor and the right wheel cover assembly are connected in sequence to form the fourth annular force transmission frame.

4. The vehicle body rear structure according to claim 2, characterized in that: The left wheel cover assembly includes a left wheel cover and a left wheel cover column connected to the inner side of the left wheel cover, and the right wheel cover assembly includes a right wheel cover and a right wheel cover column connected to the inner side of the right wheel cover; the front crossbeam of the coat rack is connected between the upper end of the left wheel cover column and the upper end of the right wheel cover column, and the crossbeam on the floor is connected between the lower end of the left wheel cover column and the lower end of the right wheel cover column; The front crossbeam of the coat rack, the left wheel house column, the crossbeam on the floor and the right wheel house column are connected in sequence to form the fourth annular force transmission frame.

5. The vehicle body rear structure according to claim 4, characterized in that: The cross beam on the floor includes a cross beam body on the floor, a first connecting member and a second connecting member. The cross beam body on the floor is connected between the left wheel house and the right wheel house. The first connecting member is connected between the left end of the cross beam body on the floor and the lower end of the left wheel house column. The second connecting member is connected between the right end of the cross beam body on the floor and the lower end of the right wheel house column.

6. The vehicle body rear structure according to claim 4, characterized in that: A first crossbeam extends from the upper end of the left wheel housing column toward the front crossbeam of the coat rack, and the first crossbeam is connected to the left end of the front crossbeam of the coat rack; A second cross beam is extended from the upper end of the right wheel housing column toward the front cross beam of the coat rack, and the second cross beam is connected to the right end of the front cross beam of the coat rack.

7. The vehicle body rear structure according to claim 2, characterized in that: A first window is provided between the first left side column and the second left side column; and a first longitudinal beam is further provided, the first longitudinal beam being connected between the first left side column and the second left side column and spanning the first window; A second window is arranged between the first upright post of the right side enclosure and the second upright post of the right side enclosure; and a second longitudinal beam is also included, wherein the second longitudinal beam is connected between the second upright post of the left side enclosure and the second upright post of the right side enclosure and spans the second window.

8. The vehicle body rear structure according to claim 2, characterized in that: It also includes a front cross beam of the roof, which is connected between the front section of the left upper side beam and the front section of the right upper side beam. The front cross beam of the roof, the left upper side beam, the rear cross beam of the roof and the right upper side beam enclose an installation area.

9. The vehicle body rear structure according to claim 2, characterized in that: The front cross beam of the top cover, the left upper side beam, the right upper side beam, the rear cross beam of the coat rack and the rear cross beam of the top cover form a fifth annular force transmission frame.

10. The vehicle body rear structure according to claim 2, characterized in that: The rear crossbeam of the top cover, the second upright column on the left side, the crossbeam on the floor, the second upright column on the right side and the front crossbeam of the coat rack form a sixth annular force transmission frame.

11. The vehicle body rear structure according to any one of claims 1 to 10, characterized in that: The main body of the clothes rack is in a stepped shape, and includes a front side plate, a first top plate, a middle side plate and a second top plate, the first top plate is connected between the upper side of the front side plate and the lower side of the middle side plate, the front side of the second top plate is connected to the upper side of the middle side plate, the front crossbeam of the clothes rack is connected to the rear side of the front side plate and the lower side of the first top plate, and the rear crossbeam of the clothes rack is connected to the rear side of the second top plate.

12. A vehicle, characterized in that: The vehicle body rear structure comprises any one of claims 1-11.

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