Vehicle body rear structure and vehicle

Abstract

The invention relates to a vehicle body rear structure and a vehicle, and the vehicle body rear structure comprises a top cover rear cross beam, a left side wall framework, a right side wall framework, a clothes tree and a rear floor upper cross beam, the hat and coat stand comprises a hat and coat stand main body, a hat and coat stand front cross beam connected to the front side of the hat and coat stand main body and a hat and coat stand rear cross beam connected to the rear side of the hat and coat stand main body, and the top cover rear cross beam is located in front of the hat and coat stand rear cross beam; the hat and coat stand is located between the top cover rear cross beam and the rear floor upper cross beam in the height direction of the vehicle. According to the vehicle body rear structure, all the annular force transmission frames are connected with one another, the vehicle body rear structure with the continuous transmission paths of the annular force transmission frames is formed, and the bending and torsional rigidity and modality of the whole vehicle are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle bodies, and in particular relates to a vehicle body rear structure and a vehicle. Background Art

[0002] In the existing rear body frame, generally only a vertical annular force transmission frame structure is constructed at the C-pillar and / or D-pillar position. The annular force transmission frames are relatively few and discontinuous, and the bending stiffness and torsional stiffness of the whole vehicle are poor, and the modal is low. Summary of the invention

[0003] The technical problem to be solved by the present invention 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.

[0004] In order to solve the above technical problems, on the one hand, an embodiment of the present invention provides a vehicle body rear structure, including a roof rear cross beam, a left side surrounding frame, a right side surrounding frame, a coat rack and a cross beam on a rear floor, wherein 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;

[0005] 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;

[0006] 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.

[0007] Optionally, the left side enclosure frame includes a first left side enclosure column, a second left side enclosure column, a left wheel cover assembly, and a left upper side beam connected to the upper ends of the first left side enclosure column and the second left side enclosure column; the right side enclosure frame includes a first right side enclosure column, a second right side enclosure column, a right wheel cover assembly, and a right upper side beam connected to the upper ends of the first right side enclosure column and the second right side enclosure column; the left wheel cover assembly is connected to the lower end of the second left side enclosure column, and the right wheel cover assembly is connected to the lower end of the second right side enclosure column;

[0008] 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.

[0009] Optionally, the rear cross beam of the roof 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;

[0010] 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.

[0011] Optionally, 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;

[0012] 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.

[0013] Optionally, 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, and 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.

[0014] Optionally, 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;

[0015] 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.

[0016] Optionally, a first window is provided between the first left side wall column and the second left side wall column; and further comprising a first longitudinal beam, the first longitudinal beam being connected between the first left side wall column and the second left side wall column and spanning the first window;

[0017] 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.

[0018] Optionally, 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.

[0019] Optionally, the front crossbeam of the roof, the left upper side beam, the right upper side beam, the rear crossbeam of the coat rack and the rear crossbeam of the roof constitute a fifth annular force transmission frame.

[0020] Optionally, the rear crossbeam of the top cover, the second upright column on the left side, the upper crossbeam of the floor, the second upright column on the right side and the front crossbeam of the clothes rack form a sixth annular force transmission frame.

[0021] Optionally, the clothes rack body is stepped, comprising a front side panel, a first top panel, a middle side panel and a second top panel, the first top panel being 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 being connected to the upper side of the middle side panel, the front cross beam of the clothes rack being connected to the rear side of the front side panel and the lower side of the first top panel, and the rear cross beam of the clothes rack being connected to the rear side of the second top panel.

[0022] In the rear structure of the vehicle body of the embodiment of the present invention, the rear cross beam of the roof, the left side surrounding frame, the rear cross beam of the coat rack and the right side surrounding frame are connected in sequence to form a first annular force transmission frame, the front cross beam of the coat rack, the left side surrounding frame, the rear cross beam of the coat rack and the right side surrounding frame are connected in sequence to form a second annular force transmission frame, the rear cross beam of the roof, the left side surrounding frame, the front cross beam 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 cross beam of the coat rack, the left side surrounding frame, the upper cross beam 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 intersects with the second annular force transmission frame at the rear cross beam of the coat rack, the first annular force transmission frame intersects with the third annular force transmission frame at the rear cross beam 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 cross beam of the coat rack, and 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 mode 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.

[0023] Based on simulation analysis, the vehicle adopting the rear body structure of the present application has significantly improved bending stiffness, torsional stiffness and modality compared to a certain model of the same level. The torsional stiffness reaches 25600Nm / °, the performance is improved by 25%, the bending stiffness performance is improved by 20%, the NVH performance is improved by 50%, the modality is improved by 10%, the stiffness of the subframe mounting point is improved by 20%, the body weight is reduced by about 10kg, and the cost is saved by about 200 yuan.

[0024] 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.

[0025] On the other hand, an embodiment of the present invention further provides a vehicle, which includes the above-mentioned vehicle body rear structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of a vehicle body rear structure provided by an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a left side perimeter frame of a vehicle body rear structure provided by an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of a right side surrounding frame of a vehicle body rear structure provided by an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of a coat rack of a vehicle body rear structure provided by an embodiment of the present invention;

[0030] Figure 5 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 invention;

[0031] Figure 6 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 invention;

[0032] Figure 7 It is a schematic diagram of a cross beam on the floor of a vehicle body rear structure provided by an embodiment of the present invention.

[0033] The reference numerals in the specification are as follows:

[0034] 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;

[0035] 1. Rear crossbeam of top cover;

[0036] 2. Left side frame; 21. First column of left side frame; 22. Second column of left side frame; 23. Left wheel cover assembly; 231. Left wheel cover; 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;

[0037] 3. Right side frame; 31. First right side column; 32. Second right side column; 33. Right wheel cover assembly; 331. Right wheel cover; 332. Right wheel cover column; 3321. Second cross beam; 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;

[0038] 4. coat rack; 41. coat rack body; 411. front side plate; 412. first top plate; 413. middle side plate; 414. second top plate; 42. coat rack front crossbeam; 43. coat rack rear crossbeam;

[0039] 5. Crossbeam on the rear floor; 51. Crossbeam body on the floor; 52. First connecting piece; 53. Second connecting piece;

[0040] 6. Front crossbeam of roof. DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] In this article, front, back, left, right, up, and down refer to the directions of a vehicle when it is placed horizontally. The vehicle width direction is the left-right direction (Y direction), the vehicle height direction is the up-down direction (Z direction), and the vehicle length direction is the front-back direction (X direction).

[0043] See also Figures 1 to 7 The rear vehicle body structure provided by the embodiment of the present invention includes a roof rear cross beam 1, a left side surrounding frame 2, a right side surrounding frame 3, a coat rack 4 and a rear floor upper cross beam 5, the coat rack 4 includes a coat rack body 41, a coat rack front cross beam 42 connected to the front side of the coat rack body 41, and a coat rack rear cross beam 43 connected to the 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, and the coat rack 4 is located between the roof rear cross beam 1 and the rear floor upper cross beam 5 in the vehicle height direction.

[0044] The top cover rear cross beam 1 is connected between the upper side of the left side frame 2 and the upper side of the right side frame 3, the coat rack front cross beam 42 is connected between the left side frame 2 and the right side frame 3, the coat rack rear cross beam 43 is connected between the rear side of the left side frame 2 and the rear side of the right side frame 3, and the rear floor upper cross beam 5 is connected between the lower side of the left side frame 2 and the lower side of the right side frame 3. The rear floor upper cross beam 5 is suitable for welding on the rear floor.

[0045] See also Figure 1 The rear crossbeam 1 of the top cover, the left side surrounding frame 2, the rear crossbeam 43 of the coat rack and the right side surrounding frame 3 are connected in sequence to form a first annular force transmission frame R1; the front crossbeam 42 of the coat rack, the left side surrounding frame 2, the rear crossbeam 43 of the coat rack and the right side surrounding frame 3 are connected in sequence to form a second annular force transmission frame R2; the rear crossbeam 1 of the top cover, the left side surrounding frame 2, the front crossbeam 42 of the coat rack and the right side surrounding frame 3 are connected in sequence to form a third annular force transmission frame R3; the front crossbeam 42 of the coat rack, the left side surrounding frame 2, the crossbeam 5 on the floor and the right side surrounding frame 3 are connected in sequence to form a fourth annular force transmission frame R4.

[0046] The first annular force transmission frame R1 gradually tilts downward from front to back, playing a role in resisting sway in the Z direction.

[0047] 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 anti-swaying in the Z direction.

[0048] The third annular force transmission frame R3 is substantially 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.

[0049] The fourth annular force transmission frame R4 is substantially parallel to the vertical plane or forms a small angle with the vertical plane. The fourth annular force transmission frame R4 is substantially parallel to the vertical plane or forms a small angle with the vertical plane.

[0050] In one embodiment, see Figures 1 to 3 The left side frame 2 includes a left side first column 21, a left side second column 22, a left wheel cover assembly 23, and a left upper side beam 24 connected to the upper ends of the left side first column 21 and the left side second column 22; the right side frame 3 includes a right side first column 31, a right side second column 32, a right wheel cover assembly 33, and a right upper side beam 34 connected to the upper ends of the right side first column 31 and the right side second column 32; the left wheel cover assembly 23 is connected to the lower end of the left side second column 22, and the right wheel cover assembly 33 is connected to the lower end of the right side second column 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.

[0051] In one embodiment, see Figures 1 to 3 The rear cross beam 1 of the top cover is connected between the front end of the rear section 242 of the left upper side beam and the front end of the rear section 342 of the right upper side beam, the front cross beam 42 of the coat rack is connected between the upper side of the left wheel cover assembly 23 and the upper side of the right wheel cover assembly 33, the rear cross beam 43 of the coat rack is connected between the rear end of the rear section 242 of the left upper side beam and the rear end of the rear section 342 of the right upper side beam, and the upper cross beam 5 on the rear floor is connected between the lower side of the left wheel cover assembly 23 and the lower side of the right wheel cover assembly 33. In this way, the rear cross beam 1 of the top cover, the rear section 242 of the left upper side beam, the rear cross beam 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 cross beam 42 of the coat rack, the second column 22 on the left side, the rear cross beam 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 cross beam 1 of the top cover, the second column 22 on the left side, the front cross beam 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 cross beam 42 of the coat rack, the left wheel cover assembly 23, the cross beam 5 on the floor and the right wheel cover assembly 24 are connected in sequence to form the fourth annular force transmission frame R4.

[0052] In one embodiment, see Figures 1 to 3The left wheel cover assembly 23 includes a left wheel cover 231 and a left wheel cover column (not visible in the figure) 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 front crossbeam 42 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 332, and the crossbeam 5 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 332; the front crossbeam 42 of the coat rack, the left wheel cover column, the crossbeam 5 on the floor and the right wheel cover column 332 are connected in sequence to form the fourth annular force transmission frame R4. The left wheel housing column is a reinforcement of the left wheel housing 231. Thus, when the left wheel housing 231 collides, the impact force will be transmitted to the fourth annular force transmission frame R4 through the left wheel housing column, and then the fourth annular force transmission frame R4 will be diverged to the first annular force transmission frame R1, the second annular force transmission frame R2, and the first annular force transmission frame R3. The entire rear part of the vehicle body is evenly stressed, and excessive intrusion into the passenger compartment is avoided. The right wheel housing column 332 is a reinforcement of the left wheel housing 331. Thus, when the right wheel housing 331 collides, the impact force will be transmitted to the fourth annular force transmission frame R4 through the right wheel housing column 332, and then the fourth annular force transmission frame R4 will be diverged to the first annular force transmission frame R1, the second annular force transmission frame R2, and the first annular force transmission frame R3. The entire rear part of the vehicle body is evenly stressed, and excessive intrusion into the passenger compartment is avoided.

[0053] In one embodiment, see Figure 1 and Figure 7 The floor cross beam 5 includes a floor cross beam body 51, a first connecting member 52 and a second connecting member 53. The floor cross beam body 51 is connected between the left wheel housing 231 and the right wheel housing 331. The first connecting member 52 is connected between the left end of the floor cross beam body 51 and the lower end of the left wheel housing column. The second connecting member 53 is connected between the right end of the floor cross beam body 51 and the lower end of the right wheel housing column 332. In this way, the connection area between the floor cross beam 5 and the left wheel housing assembly 23 and the connection area between the floor cross beam 5 and the right wheel housing assembly 33 can be increased, thereby increasing the connection strength between the floor cross beam 5 and the left wheel housing assembly 23 and the right wheel housing assembly 33.

[0054] In one embodiment, a first crossbeam (not visible in the figure) extends from the upper end of the left wheel housing column toward the front crossbeam 42 of the coat rack, and the first crossbeam is connected to the left end of the front crossbeam 42 of the coat rack. Figure 1 and Figure 3 The upper end of the right wheel housing column 332 extends a second cross beam 3321 toward the front cross beam 42 of the coat rack, and the second cross beam 3321 is connected to the right end of the front cross beam 42 of the coat rack.

[0055] In one embodiment, see Figure 1 and Figure 2 A first window 25 (commonly referred to as a triangular window) is provided between the first left side pillar 21 and the second left side pillar 22; a first longitudinal beam 26 is further included, and the first longitudinal beam 26 is connected between the first left side pillar 21 and the second left side pillar 22 and spans across the first window 25. The strength at the first window 25 is strengthened by the first longitudinal beam 26, enhancing the strength of the left side frame 2.

[0056] In one embodiment, referring to Figure 3 A second window 35 is provided between the first right side pillar 31 and the second right side pillar 32; a second longitudinal beam 36 is further included, and the second longitudinal beam 36 is connected between the first right side pillar 31 and the second right side pillar 32 and spans across the second window 35. The strength at the second window 35 is strengthened by the second longitudinal beam 36, enhancing the strength of the right side frame 3.

[0057] In one embodiment, referring to Figure 1 a front roof cross beam 6 is further included, and the front roof cross beam 6 is connected between the front section 241 of the left upper side beam and the front section 341 of the right upper side beam. The front roof cross beam 6, the left upper side beam 24, the rear roof cross beam 1, and the right upper side beam 34 enclose an installation area D suitable for installing a panoramic sunroof. In this way, the configuration of the panoramic sunroof can be realized, the skylight opening is relatively large, the field of vision is wide, and the experience is good.

[0058] In one embodiment, referring to Figure 5 the rear roof cross beam 1 is a beam with a closed cross section, and the interior of the rear roof cross beam 1 has an inner cavity. Compared with the existing open-type roof cross beam, it has greater stiffness and strength and is not easily bent during a collision. Both ends in the length direction of the rear roof cross beam 1 have flanges for welding with the left upper side beam 24 and the right upper side beam 34.

[0059] In one embodiment, referring to Figure 6 the front roof cross beam 6 is a beam with a closed cross section, and the interior of the front roof cross beam 6 has an inner cavity. Compared with the existing open-type roof cross beam, it has greater stiffness and strength and is not easily bent during a collision. Both ends in the length direction of the front roof cross beam 6 have flanges for welding with the left upper side beam 24 and the right upper side beam 34.

[0060] In one embodiment, referring to Figure 1 the front roof cross beam 6, the left upper side beam 24, the right upper side beam 34, the rear衣帽架 cross beam 43, and the rear roof cross beam 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.

[0061] In one embodiment, referring to Figure 1, the rear cross member 1 of the roof panel is located behind the second row of seats in the X direction, so that the rear cross member 1 of the roof panel is far from the heads of the second row of occupants, and there is sufficient headroom for the second row of occupants, resulting in high riding comfort.

[0062] In one embodiment, referring to Figure 1 , the rear cross member 1 of the roof panel, the second left side pillar 22, the upper floor cross member 5, the second right side pillar 32 and the front cross member 42 of the coat rack form the sixth annular force transmission frame R6. The sixth annular force transmission frame R6 is in the shape of a "day", and plays a role in Y-direction composite anti-torsion.

[0063] In one embodiment, referring to Figure 4 , the coat rack main body 41 is in a stepped shape. The coat rack 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 cross member 42 of the coat rack is connected to the rear side of the front side plate 411 and the lower side of the first top plate 412. The rear cross member 43 of the coat rack is connected to the rear side of the second top plate 414. The second top plate 414 has a larger width and is used for placing items. The front cross member 42 of the coat rack is arranged behind the front side plate 411 of the coat rack main body 41 to avoid occupying the space of the occupant compartment.

[0064] Of course, in some embodiments, the front side plate 411 and the first top plate 412 may also be part of the front cross member 42 of the coat rack.

[0065] In the rear body structure of the embodiment of the present invention, the left side frame 2, the right side frame 3, the coat rack 4, and the upper floor cross member 5 are assembled into a body frame sub-assembly through connection methods such as welding, screwing, and structural adhesive. This body frame sub-assembly is then assembled with the rear cross member 1 of the roof panel and the front cross member 6 of the roof panel through welding and screwing to form the rear body structure.

[0066] For the rear body structure of the embodiment of the present invention, referring to Figure 1, there are 7 point nodes 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 first column 21 of the left side frame and the left upper side beam 24, the second node P2 is the connection point between the first column 21 of the left side frame and the first longitudinal beam 26, the third node P3 is the connection point between the cross beam on the rear floor and the left wheel cover assembly 23, the fourth node P4 is the connection point between the rear cross beam 1 of the top cover and the left upper side beam 24, the fifth node P5 is the connection point between the second column 22 of the left side frame and the second longitudinal beam 26, the sixth node P6 is the connection point between the front cross beam 42 of the coat rack and the second column 22 of the right side frame, and the seventh node P7 is the connection point between the rear cross beam 43 of the coat rack and the left upper side beam 24. The right side frame 3 also has 7 point nodes, and the 7 nodes on the right side frame 3 are symmetrically arranged with the 7 nodes on the left side frame 2.

[0067] At each node, the welded joints are strengthened to strengthen the strength of the entire rear structure and improve the structural stability of the entire rear structure. The joint refers to the welding of two parts by flange overlap or nesting, and the corresponding beam has an internal cavity (force transmission cavity).

[0068] In the rear structure of the vehicle body of the embodiment of the present invention, the first annular force transmission frame R1 and the second annular force transmission frame R2 intersect at the rear cross beam 43 of the coat rack (the rear cross beam 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 cross beam 1 of the top cover (the rear cross beam 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 R3 intersect at the rear cross beam 1 of the top cover (the rear cross beam 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 mode 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.

[0069] Based on simulation analysis, the vehicle adopting the rear body structure of the embodiment of the present application has significantly improved bending stiffness, torsional stiffness and modal compared with a certain vehicle of the same level. The torsional stiffness reaches 25600Nm / °, the performance is improved by 25%, the bending stiffness performance is improved by 20%, the NVH performance is improved by 50%, the modal is improved by 10%, the stiffness of the subframe mounting point is improved by 20%, the body weight is reduced by about 10kg, and the cost is saved by about 200 yuan.

[0070] In addition, in terms of safety, with only two front and rear roof beams (front roof beam 6 and rear roof beam 1), it can meet the CIASI requirements of excellent (G) for top pressure, side impact and small offset impact performance.

[0071] In addition, an embodiment of the present invention further provides a vehicle, which includes the vehicle body rear structure of the above embodiment.

[0072] In one embodiment, the vehicle is a car, in particular a car with a large-sized panoramic sunroof.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

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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