Vehicle body rear structure and vehicle

Abstract

The application relates to a vehicle body rear structure and a vehicle, which comprises a rear quarter cross stiffener, a rear wheel cover inner plate, a rear wheel cover inner stiffener, a stiffener connecting plate, a rear shock absorber mounting plate, a rear floor upper cross beam and a rear longitudinal beam; the rear wheel cover inner stiffener and the stiffener connecting plate are fixed to the inner side of the rear wheel cover inner plate; the upper end of the rear wheel cover inner stiffener is fixed to the rear quarter cross stiffener, the lower end is fixed to the upper end of the stiffener connecting plate, and the lower end of the stiffener connecting plate is fixed to the rear floor upper cross beam; the rear shock absorber mounting plate is fixed to the outer side of the rear wheel cover inner plate; the rear wheel cover inner stiffener and the rear shock absorber mounting plate enclose a force transmission cavity extending in the up-down direction. The force transmission path forms a closed loop, which is beneficial to improving the bending-torsional stiffness mode of the vehicle body rear structure and the dynamic stiffness of the rear shock absorber fixing point.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of vehicle body, in particular relates to a rear structure of vehicle body and a vehicle. BACKGROUND

[0002] The rear system of the automobile needs to have enough rigidity to improve the torsional rigidity and durability, bear the rear collision, disperse the collision load and absorb energy through the cross beam, longitudinal beam and the like, prevent stress concentration and excessive deformation to protect the passengers. With the development of automobile technology, the performance requirements of automobile rigidity, collision safety, NVH and the like are higher and higher, and a good rear structure of vehicle body can reduce its weight under the condition of meeting the same performance requirements. Therefore, in the design process of the rear structure, multiple factors such as the force transmission path, NVH, collision performance, weight, process, cost and the like need to be considered comprehensively.

[0003] At present, the force transmission path of the rear structure of the vehicle body is discontinuous and less, and the bending-torsional rigidity mode of the rear structure of the vehicle body is not obviously improved, and the dynamic rigidity of the rear shock absorber fixing point is not obviously improved. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a rear structure of vehicle body and a vehicle to solve the problem that the existing reinforcement scheme cannot obviously improve the bending-torsional rigidity mode of the rear structure of the vehicle body.

[0005] To solve the above technical problem, the embodiment of the present application provides a rear structure of vehicle body, which comprises a rear side wall transverse reinforcement beam, a rear wheel cover inner plate, a rear wheel cover inner reinforcement plate, a reinforcement plate connecting plate, a rear shock absorber mounting plate, a rear floor upper cross beam and a rear longitudinal beam.

[0006] The rear wheel cover inner reinforcement plate and the reinforcement plate connecting plate are fixed to the inner side of the rear wheel cover inner plate, the upper end of the rear wheel cover inner reinforcement plate is fixed to the rear side wall transverse reinforcement beam, the lower end is fixed to the upper end of the reinforcement plate connecting plate, and the lower end of the reinforcement plate connecting plate is fixed to the rear floor upper cross beam.

[0007] The rear shock absorber mounting plate is fixed to the outer side of the rear wheel cover inner plate.

[0008] The rear wheel cover inner reinforcement plate and the rear shock absorber mounting plate enclose a force transmission cavity extending in the up-down direction.

[0009] Optionally, an upper concave cavity is formed by inwardly recessing the rear wheel house inner reinforcing plate, the upper concave cavity is upwardly connected to the rear side wall transverse reinforcing beam; a lower concave cavity is formed by inwardly recessing the reinforcing plate connecting plate, the upper end of the lower concave cavity is connected to the lower end of the upper concave cavity, and the lower end of the lower concave cavity is connected to the rear floor upper transverse beam; an outer side concave cavity is formed by outwardly recessing the rear shock absorber mounting plate, the outer side concave cavity is upwardly connected to the upper end of the rear wheel house inner plate; the upper concave cavity and the outer side concave cavity combine to form the force transmission cavity.

[0010] Optionally, the rear body structure further comprises a rear side wall reinforcing plate and a D-pillar lower inner plate, one end of the rear side wall transverse reinforcing beam is fixed to the rear side wall reinforcing plate, and the other end of the rear side wall transverse reinforcing beam is fixed to the D-pillar lower inner plate.

[0011] Optionally, the force transmission cavity is a closed cavity, and the plate area of the rear wheel house inner plate located in the force transmission cavity divides the force transmission cavity into two layers of cavities.

[0012] Optionally, it further comprises a floor panel, a rocker panel rear section, a towing arm front mounting bracket, and a towing arm rear mounting bracket.

[0013] The rear longitudinal beam is provided with a groove that penetrates through both ends of the rear longitudinal beam and is open upwardly;

[0014] The towing arm front mounting bracket and the towing arm rear mounting bracket are embedded in the groove and fixed with the groove wall, the rocker panel rear section, and the floor panel;

[0015] A towing arm mounting groove is formed between the towing arm front mounting bracket, the towing arm rear mounting bracket, and the groove wall.

[0016] Optionally, the towing arm front mounting bracket comprises a front mounting bracket body, a front mounting bracket upper turn-up edge provided on the upper side of the front mounting bracket body, a front mounting bracket lower turn-up edge provided on the lower side of the front mounting bracket body, a front mounting bracket inner turn-up edge provided on the inner side of the front mounting bracket body, and a front mounting bracket outer turn-up edge provided on the outer side of the front mounting bracket body.

[0017] The front mounting bracket upper turn-up edge is fixed to the top of the inner side of the rear longitudinal beam, the floor panel, and the rocker panel rear section;

[0018] The front mounting bracket lower turn-up edge is fixed to the bottom wall of the groove, and the front mounting bracket inner turn-up edge is fixed to the inner side wall of the groove;

[0019] The lower end of the front mounting bracket outer turn-up edge is fixed to the outer side wall of the groove, and the upper end is fixed to the rocker panel rear section.

[0020] Optionally, the rear mounting bracket of the trailing arm comprises a rear mounting bracket body, a rear mounting bracket upper turn-up edge arranged on the upper side of the rear mounting bracket body, a rear mounting bracket lower turn-up edge arranged on the lower side of the rear mounting bracket body, a rear mounting bracket inner turn-up edge arranged on the inner side of the rear mounting bracket body, and a rear mounting bracket outer turn-up edge arranged on the outer side of the rear mounting bracket body.

[0021] The rear mounting bracket upper turn-up edge is fixed to the inner side of the rear longitudinal beam, the floor panel, and the rear section of the rocker panel.

[0022] The rear mounting bracket lower turn-up edge is fixed to the bottom wall of the groove, and the rear mounting bracket inner turn-up edge is fixed to the inner side wall of the groove.

[0023] The lower end of the rear mounting bracket outer turn-up edge is fixed to the outer side wall of the groove, and the upper end is fixed to the rear section of the rocker panel.

[0024] Optionally, the rear mounting bracket lower turn-up edge is folded rearward, and the rear mounting bracket upper turn-up edge comprises an inner turn-up edge section and an outer turn-up edge section located on the outer side of the inner turn-up edge section. The inner turn-up edge section is folded forward, and the outer turn-up edge section is folded rearward. The rear side of the outer turn-up edge section is provided with a rear upper turn-up edge fixed to the outer side wall of the groove, and the outer side of the outer turn-up edge section is fixed to the rear section of the rocker panel.

[0025] Optionally, the rear longitudinal beam is provided with a groove penetrating through the front and rear ends thereof and opening upward.

[0026] The rear body structure further comprises a front cross beam connecting plate, a longitudinal beam front support bracket, a shock absorbing spring mounting bracket, a longitudinal beam rear support bracket, and a rear cross beam connecting plate, which are respectively fixed to the rear longitudinal beam. The front cross beam connecting plate, the shock absorbing spring mounting bracket, and the rear cross beam connecting plate are located outside the groove, and the longitudinal beam front support bracket and the longitudinal beam rear support bracket are located inside the groove.

[0027] The front cross beam connecting plate, the longitudinal beam front support bracket, the shock absorbing spring mounting bracket, the longitudinal beam rear support bracket, and the rear cross beam connecting plate are sequentially arranged in the front-rear direction, and two adjacent structures are overlapped in the front-rear direction.

[0028] Optionally, a first portion of the longitudinal beam front support bracket, a first portion of the rear longitudinal beam, and a first portion of the front cross beam connecting plate are stacked and fixed in the up-down direction.

[0029] A second portion of the front cross beam connecting plate, a second portion of the rear longitudinal beam, and a second portion of the longitudinal beam front support bracket are stacked and fixed in the inner-outer direction.

[0030] A third portion of the longitudinal beam front support bracket, a third portion of the rear longitudinal beam, and a first portion of the shock absorbing spring mounting bracket are stacked and fixed in the up-down direction.

[0031] The fourth part of the front support bracket of the longitudinal beam, the fourth part of the rear longitudinal beam and the second part of the shock absorber mounting bracket are stacked and fixed in the inner-outer direction;

[0032] The first part of the rear support bracket of the longitudinal beam, the fifth part of the rear longitudinal beam and the third part of the shock absorber mounting bracket are stacked and fixed in the up-down direction;

[0033] The second part of the rear support bracket of the longitudinal beam, the sixth part of the rear longitudinal beam and the fourth part of the shock absorber mounting bracket are stacked and fixed in the inner-outer direction;

[0034] The first part of the rear cross beam connecting plate, the seventh part of the rear longitudinal beam and the third part of the rear support bracket of the longitudinal beam are stacked and fixed in the inner-outer direction;

[0035] The fourth part of the rear support bracket of the longitudinal beam, the eighth part of the rear longitudinal beam and the second part of the rear cross beam connecting plate are stacked and fixed in the up-down direction.

[0036] Optionally, the vehicle body rear structure further comprises a reinforcement and a floor panel, the reinforcement is fixed with the reinforcement connecting plate before foaming, and the reinforcement connects the reinforcement connecting plate, the rear wheel cover inner panel and the floor panel after foaming.

[0037] In another aspect, the application also provides a vehicle comprising the aforementioned vehicle body rear structure.

[0038] Compared with the prior art, the vehicle body rear structure and the vehicle provided by the embodiments of the application have the following advantages: the transmission cavity structure formed by the rear wheel cover inner reinforcement plate and the rear shock absorber mounting plate is connected with the rear quarter cross beam at the upper end and connected with the rear floor upper cross beam through the reinforcement connecting plate at the lower end, thereby forming a closed transmission path, the upper support force of the rear shock absorber can be transmitted upward to the rear quarter cross beam, and the lower support force of the rear shock absorber can be transmitted downward to the rear floor upper cross beam for dispersion, which is beneficial to improving the bending and torsional stiffness mode of the vehicle body rear structure and the dynamic stiffness of the rear shock absorber fixing point. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a partial structure diagram of the vehicle body rear structure provided by an embodiment of the application Figure 1 ;

[0040] Figure 2 is a partial structure diagram of the vehicle body rear structure provided by an embodiment of the application Figure 2 ;

[0041] Figure 3 is a partial structure diagram of the vehicle body rear structure provided by an embodiment of the application Figure 3 ;

[0042] Figure 4 is Figure 3 B-B cross-sectional view after connecting the floor panel;

[0043] Figure 5 is Figure 1 cross-sectional view of the middle cross section of the connecting plate of the reinforcing plate after connecting the floor panel in the front and rear direction;

[0044] Figure 6 is Figure 3 perspective structural schematic view of the rear longitudinal beam in

[0045] Figure 7 is Figure 3 perspective structural schematic view of the front mounting bracket of the trailing arm in

[0046] Figure 8 is Figure 3 perspective structural schematic view of the rear mounting bracket of the trailing arm in

[0047] Figure 9 is Figure 3 perspective structural schematic view of the front cross beam connecting plate in

[0048] Figure 10 is Figure 3 perspective structural schematic view of the front support bracket of the longitudinal beam in

[0049] Figure 11 is Figure 3 perspective structural schematic view of the shock absorbing spring mounting bracket in

[0050] Figure 12 is Figure 3 perspective structural schematic view of the rear support bracket of the longitudinal beam in

[0051] Figure 13 is Figure 3 perspective structural schematic view of the rear cross beam connecting plate in

[0052] Figure 14 is Figure 3 force transmission path diagram of the rear body structure shown in

[0053] The reference signs in the specification are as follows:

[0054] 1, rear side wall reinforcing plate; 2, rear side wall transverse reinforcing beam; 3, D-pillar lower inner plate; 4, rear wheel cover inner plate; 5, rear wheel cover inner reinforcing plate; 6, reinforcing plate connecting plate; 7, rear shock absorber mounting plate; 8, rear floor upper cross beam;

[0055] 9, rear longitudinal beam; 91, groove;

[0056] 10, shock absorbing spring mounting bracket; 101, first bracket portion; 102, second bracket portion;

[0057] 11, floor panel; 12, rear section of rocker panel;

[0058] 13, front mounting bracket for trailing arm; 131, front mounting bracket body; 132, front mounting bracket upper flange; 133, front mounting bracket lower flange; 134, front mounting bracket inner flange; 135, front mounting bracket outer flange;

[0059] 14, rear mounting bracket for trailing arm; 141, rear mounting bracket body; 142, rear mounting bracket upper flange; 1421, inner flange section; 1422, outer flange section; 14221, rear upper flange; 143, rear mounting bracket lower flange; 144, rear mounting bracket inner flange; 145, rear mounting bracket outer flange;

[0060] C1, mounting slot for trailing arm;

[0061] 15, front connecting pipe; 16, rear connecting pipe;

[0062] 17, front cross beam connecting plate; 171, first front connecting portion; 172, first lower connecting portion; 173, first rear connecting portion;

[0063] 18, front support bracket for longitudinal beam; 181, front support bracket body; 182, front support bracket front lower flange; 183, front support bracket front inner flange; 184, front support bracket front outer flange; 185, front support bracket rear lower flange; 186, front support bracket rear inner flange; 187, front support bracket rear outer flange; 188, front support bracket inner lap flange; 189, front support bracket outer flange;

[0064] 19, rear support bracket for longitudinal beam; 191, rear support bracket body; 192, rear support bracket front lower flange; 193, rear support bracket front inner flange; 194, rear support bracket front outer flange; 195, rear support bracket rear lower flange; 196, rear support bracket rear inner flange; 197, rear support bracket rear outer flange; 198, rear support bracket outer flange;

[0065] 20, rear cross beam connecting plate; 201, second front connecting portion; 202, second lower connecting portion; 203, second rear connecting portion;

[0066] 21, reinforcing member;

[0067] 22, rear section of longitudinal beam. DETAILED DESCRIPTION

[0068] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0069] In this application, the directions are consistent with the directions when the vehicle is driving normally. The front-to-back direction is longitudinal, the left-to-right direction is lateral, the up-and-down direction is vertical, the inner side refers to the side of the corresponding structure facing inwards from the vehicle, and the outer side refers to the side of the corresponding structure facing outwards from the vehicle.

[0070] like Figure 1 and Figure 2 As shown, the rear structure of the vehicle body provided in this embodiment of the invention includes a rear side panel reinforcement plate 1, a rear side panel transverse reinforcement beam 2, a lower inner plate of the D-pillar 3, a rear wheel arch inner plate 4, a rear wheel arch inner reinforcement plate 5, a reinforcement plate connecting plate 6, a rear shock absorber mounting plate 7, a rear floor crossbeam 8, a rear longitudinal beam 9, and a shock absorber spring mounting bracket 10 fixed on the rear longitudinal beam 9.

[0071] One end of the rear side transverse reinforcing beam 2 is fixed to the rear side reinforcing plate 1, and the other end of the rear side transverse reinforcing beam 2 is fixed to the lower inner plate 3 of the D column;

[0072] The inner reinforcing plate 5 and the reinforcing plate connecting plate 6 of the rear wheel cover are fixed to the inner side of the inner plate 4 of the rear wheel cover; the upper end of the inner reinforcing plate 5 of the rear wheel cover is fixed to the transverse reinforcing beam 2 of the rear side wall, and the lower end is fixed to the upper end of the reinforcing plate connecting plate 6; the lower end of the reinforcing plate connecting plate 6 is fixed to the transverse beam 8 of the rear floor.

[0073] The rear shock absorber mounting plate 7 is fixed to the outer side of the rear wheel arch inner plate 4, and its lower end is fixed to the shock absorber spring mounting bracket 10;

[0074] The rear wheel arch reinforcement plate 5 and the rear shock absorber mounting plate 7 together form a force transmission cavity extending in the vertical direction.

[0075] Compared with the prior art, the rear structure of the vehicle body provided in this embodiment of the invention has a force transmission cavity structure formed by the rear wheel arch inner reinforcing plate 5 and the rear shock absorber mounting plate 7, which is connected with the rear side wall reinforcing plate 1, the rear side wall transverse reinforcing beam 2 and the lower inner plate 3 of the D-pillar to form a Y-shaped frame structure. The lower end of the Y-shaped frame structure is connected to the rear floor crossbeam 8 through the reinforcing plate connecting plate 6, thereby forming a closed-loop force transmission path. The upper support force of the rear suspension spring and the rear shock absorber can be transmitted upward to the rear side wall transverse reinforcing beam 2, and then distributed to the rear side wall reinforcing plate 1 and the lower inner plate 3 of the D-pillar through the rear side wall transverse reinforcing beam 2. The lower support force of the rear suspension spring and the rear shock absorber can be transmitted downward to the rear floor crossbeam 8 for distribution, which is beneficial to improving the bending and torsional stiffness mode of the rear structure of the body-in-white and the fixed point dynamic stiffness of the rear shock absorber.

[0076] Preferably, the force transmission cavity is a closed cavity, and the plate area of the rear wheel housing inner panel 4 located in the force transmission cavity divides the force transmission cavity into two layers, which increases the force transmission path and improves the overall stiffness of the rear shock absorber mounting plate 7, the rear wheel housing inner panel 4 and the rear wheel housing inner reinforcing plate 5.

[0077] Specifically, the rear shock absorber mounting plate 7, the rear wheel housing inner panel 4 and the rear wheel housing inner reinforcing plate 5 are welded, such as spot welding;

[0078] The upper end of the rear wheel housing inner reinforcing plate 5 is welded, such as spot welding, to the rear quarter cross beam 2;

[0079] One end of the rear quarter cross beam 2 is welded, such as spot welding, to the rear quarter reinforcing plate 1, and the other end of the rear quarter cross beam 2 is welded, such as spot welding, to the D-pillar lower inner panel 3;

[0080] The upper end of the reinforcing plate connecting plate 6 is welded, such as brazing and spot welding, to the lower end of the rear wheel housing inner reinforcing plate 5;

[0081] The lower end of the reinforcing plate connecting plate 6 is welded, such as brazing and spot welding, to the outer end of the rear floor upper cross beam 8.

[0082] In an embodiment, as shown in Figure 1 and Figure 2 The upper recess cavity of the rear wheel housing inner reinforcing plate 5 is formed by inwardly recessing the upper end of the rear wheel housing inner reinforcing plate 5, and the upper recess cavity is located outwardly of the Q1 indicated position; Figure 1 The lower recess cavity of the reinforcing plate connecting plate 6 is formed by inwardly recessing the lower end of the reinforcing plate connecting plate 6, and the lower recess cavity is located outwardly of the Q2 indicated position;

[0083] The lower recess cavity of the reinforcing plate connecting plate 6 is formed by inwardly recessing the lower end of the reinforcing plate connecting plate 6, and the lower recess cavity is located outwardly of the Q2 indicated position; Figure 1 The upper end of the lower recess cavity is connected to the lower end of the upper recess cavity, and the lower end penetrates to the rear floor upper cross beam 8;

[0084] The upper recess cavity and the lower recess cavity combine to form an inner recess cavity;

[0085] The outer recess cavity of the rear shock absorber mounting plate 7 is formed by outwardly recessing the outer end of the rear shock absorber mounting plate 7, and the outer recess cavity is located inwardly of the Q2 indicated position; Figure 1 The upper end of the outer recess cavity penetrates to the upper end of the rear wheel housing inner panel 4, and the lower end penetrates to the shock absorber spring mounting bracket 10;

[0086] The upper recess cavity and the outer recess cavity combine to form a force transmission cavity.

[0087] The rear wheel housing inner reinforcing plate 5 and the reinforcing plate connecting plate 6 transmit force through the cavity wall of the inner recess cavity between the rear quarter cross beam 2 and the rear floor upper cross beam 8, and the shock absorber spring mounting bracket 10 can transmit force upwardly through the outer recess cavity to the end of the rear quarter cross beam 2 connected to the rear wheel housing inner panel 4, which is more conducive to dispersing stress.

[0088] In an embodiment, as shown inFigure 1 、 Figure 3 、 Figure 4 and Figure 6 the floor panel 11, the rear section of the rocker 12, the front mounting bracket 13 of the trailing arm and the rear mounting bracket 14 of the trailing arm are further included;

[0089] The rear longitudinal beam 9 is provided with a groove 91 penetrating through both ends of the rear longitudinal beam 9 and opening upward;

[0090] The front mounting bracket 13 of the trailing arm and the rear mounting bracket 14 of the trailing arm are embedded in the groove 91, fixed with the groove wall of the groove 91, and further fixed with the rear section of the rocker 12 and the floor panel 11;

[0091] The front mounting bracket 13 of the trailing arm, the rear mounting bracket 14 of the trailing arm and the groove wall of the groove 91 form a trailing arm mounting groove C1.

[0092] When assembling the trailing arm, the trailing arm is mounted from bottom to top into the trailing arm mounting groove C1, and then the trailing arm is fixed on the rear longitudinal beam 9.

[0093] The front mounting bracket 13 of the trailing arm and the rear mounting bracket 14 of the trailing arm are fixed with the rear longitudinal beam 9, the rear section of the rocker 12 and the floor panel 11, such as welding, which improves the rigidity of the trailing arm connecting area of the rear structure of the vehicle body, enhances the fatigue durability and NVH performance of the trailing arm connecting area, ensures the high rigidity of the rear longitudinal beam 9, and prevents the rear longitudinal beam 9 from bending in the rear collision. The provision of the trailing arm mounting groove C1 also facilitates the welding of related parts of the trailing arm connecting area.

[0094] Specifically, the top of the front mounting bracket 13 of the trailing arm and the top of the rear mounting bracket 14 of the trailing arm are both connected to the floor panel 11.

[0095] In an embodiment, as shown in Figure 3 、 Figure 4 and Figure 7 , the front mounting bracket 13 of the trailing arm includes a front mounting bracket body 131, a front mounting bracket upper turn-up edge 132 provided on the upper side of the front mounting bracket body 131, a front mounting bracket lower turn-up edge 133 provided on the lower side of the front mounting bracket body 131, a front mounting bracket inner turn-up edge 134 provided on the inner side of the front mounting bracket body 131, and a front mounting bracket outer turn-up edge 135 provided on the outer side of the front mounting bracket body 131;

[0096] The front mounting bracket upper turn-up edge 132 is fixed (specifically, welded) to the top of the inner side of the rear longitudinal beam 9, the floor panel 11 and the rear section of the rocker 12;

[0097] The front mounting bracket lower turn-up edge 133 is fixed (specifically, welded) to the bottom wall of the groove 91, and the front mounting bracket inner turn-up edge 134 is fixed (specifically, welded) to the inner side wall of the groove 91;

[0098] The lower end of the front mounting bracket out-turned edge 135 is fixed (specifically, welded) to the outer side wall of the recess 91, and the upper end is fixed to the rear section of the rocker 12.

[0099] In the present application, the inner side wall of the recess refers to the side wall of the recess facing the middle of the vehicle in the left-right direction, and the outer side wall of the recess refers to the side wall of the recess facing the outer side of the vehicle in the left-right direction. That is, when the rear longitudinal beam is the left rear longitudinal beam of the vehicle, the inner side wall of the recess refers to the right side wall of the recess, and the outer side wall of the recess refers to the left side wall of the recess. When the rear longitudinal beam is the right rear longitudinal beam of the vehicle, the inner side wall of the recess refers to the left side wall of the recess, and the outer side wall of the recess refers to the right side wall of the recess.

[0100] The structure is simple, which is more conducive to improving the rigidity of the drag arm connecting area of the rear structure of the vehicle body, improving the fatigue durability and NVH performance of the drag arm connecting area, ensuring the high rigidity of the rear longitudinal beam 9, and preventing the rear longitudinal beam 9 from bending in the rear collision.

[0101] Preferably, the front mounting bracket lower turned edge 133 is folded forward, and the front mounting bracket upper turned edge 132 is folded backward, so that the front mounting bracket lower turned edge 133, the front mounting bracket body 131, and the front mounting bracket upper turned edge 132 form a Z-shaped bracket, facilitating the installation and positioning of the drag arm.

[0102] Specifically, the inner end of the front mounting bracket upper turned edge 132 is fixed between the inner side of the rear longitudinal beam 9 and the floor panel 11, and the outer end is fixed between the rear section of the rocker 12 and the floor panel 11.

[0103] In an embodiment, as shown in Figure 3 , Figure 4 and Figure 8 the rear mounting bracket 14 of the drag arm includes a rear mounting bracket body 141, a rear mounting bracket upper turned edge 142 arranged on the upper side of the rear mounting bracket body 141, a rear mounting bracket lower turned edge 143 arranged on the lower side of the rear mounting bracket body 141, a rear mounting bracket inner turned edge 144 arranged on the inner side of the rear mounting bracket body 141, and a rear mounting bracket outer turned edge 145 arranged on the outer side of the rear mounting bracket body 141.

[0104] The rear mounting bracket upper turned edge 142 is fixed (specifically, welded) to the inner side of the rear longitudinal beam 9, the floor panel 11, and the rear section of the rocker 12.

[0105] The rear mounting bracket lower turned edge 143 is fixed (specifically, welded) to the bottom wall of the recess 91, and the rear mounting bracket inner turned edge 144 is fixed (specifically, welded) to the inner side wall of the recess 91.

[0106] The lower end of the rear mounting bracket outer turned edge 145 is fixed (specifically, welded) to the outer side wall of the recess 91, and the upper end is fixed to the rear section of the rocker 12.

[0107] The structure is simple, and the rigidity of the trailing arm connecting area of the rear structure of the vehicle body is improved, the fatigue durability and NVH performance of the trailing arm connecting area are improved, the rear longitudinal beam 9 has high rigidity, and the rear longitudinal beam 9 is prevented from being bent in a rear collision.

[0108] Preferably, the rear mounting bracket lower turn-down edge 143 is folded rearward; the rear mounting bracket upper turn-down edge 142 comprises an inner turn-down edge segment 1421 and an outer turn-down edge segment 1422 located outside the inner turn-down edge segment 1421, the inner turn-down edge segment 1421 is folded forward, and the outer turn-down edge segment 1422 is folded rearward, the rear side of the outer turn-down edge segment 1422 is provided with a rear upper turn-down edge 14221 fixed (specifically, fitted and welded) to the outer side wall of the groove 91, and the outer side of the outer turn-down edge segment 1422 is fixed (specifically, fitted and welded) to the rear section 12 of the rocker; the rear mounting bracket lower turn-down edge 143, the rear mounting bracket body 141, and the inner turn-down edge segment 1421 form a Z-shaped bracket; the installation and positioning of the trailing arm are facilitated, and the rigidity of the trailing arm connecting area of the rear structure of the vehicle body is further improved.

[0109] Specifically, the inner end of the rear mounting bracket upper turn-down edge 142 is fixed between the inner side of the rear longitudinal beam 9 and the floor panel 11, and the outer end is fixed between the rear section 12 of the rocker and the floor panel 11.

[0110] In an embodiment, as shown in Figure 4 , the rear mounting bracket further comprises a front connecting pipe 15 and a rear connecting pipe 16 respectively vertically arranged in the groove 91; the front connecting pipe 15 has a fixed portion fixed to the groove wall of the groove 91, and further has a fixed portion fixed to the trailing arm front mounting bracket 13; the rear connecting pipe 16 has a fixed portion fixed to the groove wall of the groove 91, and further has a fixed portion fixed to the trailing arm rear mounting bracket 14.

[0111] When assembling the trailing arm, the trailing arm is installed from bottom to top into the trailing arm mounting groove C1, and then the trailing arm is fixed by fasteners passing through the front connecting pipe 15 and the rear connecting pipe 16, so as to realize the assembly of the trailing arm.

[0112] Specifically, the front connecting pipe 15 and the rear connecting pipe 16 are threaded pipes, the front connecting pipe 15 has a connecting portion welded to the rear longitudinal beam 9, and further has a connecting portion welded to the trailing arm front mounting bracket 13; the rear connecting pipe 16 has a connecting portion welded to the rear longitudinal beam 9, and further has a connecting portion welded to the trailing arm rear mounting bracket 14; and the fastener is a bolt and nut assembly.

[0113] In an embodiment, as shown in Figure 1 , Figure 3 and Figure 14 , the rear longitudinal beam 9 is provided with a groove 91 penetrating through the front and rear ends thereof and opening upward;

[0114] The rear body structure further comprises a front cross beam connecting plate 17, a front beam support bracket 18, a rear beam support bracket 19 and a rear cross beam connecting plate 20 fixed (concretely, welded) to the rear longitudinal beam 9 respectively; the front cross beam connecting plate 17, the shock absorbing spring mounting bracket 10 and the rear cross beam connecting plate 20 are located outside the groove 91, and the front beam support bracket 18 and the rear beam support bracket 19 are located inside the groove 91;

[0115] The front cross beam connecting plate 17, the front beam support bracket 18, the shock absorbing spring mounting bracket 10, the rear beam support bracket 19 and the rear cross beam connecting plate 20 are arranged in sequence along the front-rear direction, and two adjacent structures among the front cross beam connecting plate 17, the front beam support bracket 18, the shock absorbing spring mounting bracket 10, the rear beam support bracket 19 and the rear cross beam connecting plate 20 are overlapped front-rear, concretely, a part of the rear longitudinal beam 9 is clamped between the two adjacent structures, and the two adjacent structures are fixed with the part of the rear longitudinal beam 9, so as to realize the front-rear overlap.

[0116] The front cross beam connecting plate 17, the front beam support bracket 18, the shock absorbing spring mounting bracket 10, the rear beam support bracket 19 and the rear cross beam connecting plate 20 continuously form an efficient force transmission path, improve the overall stiffness mode of the rear longitudinal beam 9, and strengthen the shock absorbing spring damping area, while ensuring the crash performance of the rear longitudinal beam 9 and preventing the rear longitudinal beam 9 from being bent.

[0117] In an embodiment, as shown in Figure 3 , and Figure 6 to Figure 14 , a first part of the front beam support bracket 18 (concretely, a front support bracket front lower flange 182 described below), a first part of the rear longitudinal beam 9 and a first part of the front cross beam connecting plate 17 (concretely, a first lower connecting part 172 described below) are stacked and fixed along the up-down direction;

[0118] A second part of the front cross beam connecting plate 17 (concretely, a first rear connecting part 173 described below), a second part of the rear longitudinal beam 9 and a second part of the front beam support bracket 18 (concretely, a front support bracket front inner flange 183 described below) are stacked and fixed along the inner-outer direction;

[0119] A third part of the front beam support bracket 18 (concretely, a front support bracket rear lower flange 185 described below), a third part of the rear longitudinal beam 9 and a first part of the shock absorbing spring mounting bracket 10 (concretely, a first bracket part 101 described below) are stacked and fixed along the up-down direction;

[0120] A fourth part of the front beam support bracket 18 (concretely, a front support bracket rear outer flange 187 described below), a fourth part of the rear longitudinal beam 9 and a second part of the shock absorbing spring mounting bracket 10 (concretely, a front end of a second bracket part 102 described below) are stacked and fixed along the inner-outer direction;

[0121] The first portion of the rear support bracket 19 (specifically, the rear support bracket front lower flange 192 described later), the fifth portion of the rear longitudinal beam 9, and the third portion of the shock absorbing spring mounting bracket 10 (specifically, the first bracket portion 101 described later) are stacked and fixed in the up-down direction;

[0122] The second portion of the rear support bracket 19 (specifically, the rear support bracket front outer flange 194 described later), the sixth portion of the rear longitudinal beam 9, and the fourth portion of the shock absorbing spring mounting bracket 10 (specifically, the rear end of the second bracket portion 102 described later) are stacked and fixed in the inner-outer direction;

[0123] The first portion of the rear cross beam connecting plate 20 (specifically, the second front connecting portion 201 described later), the seventh portion of the rear longitudinal beam 9, and the third portion of the rear support bracket 19 (specifically, the rear support bracket front inner flange 193 described later) are stacked and fixed in the inner-outer direction;

[0124] The fourth portion of the rear support bracket 19 (specifically, the rear support bracket rear lower flange 195 described later), the eighth portion of the rear longitudinal beam 9, and the second portion of the rear cross beam connecting plate 20 (specifically, the second lower connecting portion 202 described later) are stacked and fixed in the up-down direction.

[0125] The overall rigidity mode of the rear longitudinal beam 9 is improved, the shock absorbing spring shock absorbing area is particularly strengthened, and the rear longitudinal beam 9 crash performance is ensured to prevent the rear longitudinal beam 9 from being bent.

[0126] In an embodiment, as shown in Figure 3 , and Figure 6 to Figure 14 The front cross beam connecting plate 17 includes a first front connecting portion 171, a first lower connecting portion 172, and a first rear connecting portion 173, the first front connecting portion 171 and the first rear connecting portion 173 are fixed with the inner side of the rear longitudinal beam 9, and the first lower connecting portion 172 is fixed with the bottom surface of the rear longitudinal beam 9;

[0127] The longitudinal beam front support bracket 18 includes a front support bracket body 181 in an inverted U-shaped cross section in the front-rear direction, a front support bracket front lower flange 182 provided at the bottom of the front side of the front support bracket body 181, a front support bracket front inner flange 183 provided at the inner end of the front side of the front support bracket body 181, and a front support bracket front outer flange 184 provided at the outer end of the front side of the front support bracket body 181, a front support bracket rear lower flange 185 provided at the bottom of the rear side of the front support bracket body 181, a front support bracket rear inner flange 186 provided at the inner end of the rear side of the front support bracket body 181, and a front support bracket rear outer flange 187 provided at the outer end of the rear side of the front support bracket body 181, and a front support bracket inner lap flange 188 provided at the inner end of the top side of the front support bracket body 181, and a front support bracket outer flange 189 provided at the outer end of the top side of the front support bracket body 181;

[0128] The front support bracket front lower flange 182 and the front support bracket rear lower flange 185 are fixed to the inner bottom of the recess 91, the front support bracket front inner flange 183 and the front support bracket rear inner flange 186 are fixed to the inner side wall of the recess 91, the front support bracket front outer flange 184, the front support bracket rear outer flange 187 and the front support bracket outer flange 189 are fixed to the outer side wall of the recess 91, and the front support bracket inner lap flange 188 is located outside the recess 91 and is fixed to the top of the inner side of the rear longitudinal beam 9;

[0129] The shock absorbing spring mounting bracket 10 includes a first bracket portion 101 and a second bracket portion 102 connected to the outer side of the first bracket portion 101, the first bracket portion 101 is fixed to the bottom of the rear longitudinal beam 9, and the second bracket portion 102 is fixed to the outer side of the rear longitudinal beam 9;

[0130] The longitudinal beam rear support bracket 19 includes a rear support bracket body 191 in an inverted U-shaped cross section in the front-rear direction, a rear support bracket front lower flange 192 provided at the bottom of the front side of the rear support bracket body 191, a rear support bracket front inner flange 193 provided at the inner end of the front side of the rear support bracket body 191, and a rear support bracket front outer flange 194 provided at the outer end of the front side of the rear support bracket body 191, a rear support bracket rear lower flange 195 provided at the bottom of the rear side of the rear support bracket body 191, a rear support bracket rear inner flange 196 provided at the inner end of the rear side of the rear support bracket body 191, and a rear support bracket rear outer flange 197 provided at the outer end of the rear side of the rear support bracket body 191, and a rear support bracket outer flange 198 provided at the outer end of the top side of the rear support bracket body 191;

[0131] The rear support bracket front lower flange 192 and the rear support bracket rear lower flange 195 are fixed to the inner bottom of the recess 91, the rear support bracket front inner flange 193 and the rear support bracket rear inner flange 196 are fixed to the inner side wall of the recess 91, the rear support bracket front outer flange 194, the rear support bracket rear outer flange 197 and the rear support bracket outer flange 198 are fixed to the outer side wall of the recess 91;

[0132] The rear cross beam connecting plate 20 includes a second front connecting portion 201, a second lower connecting portion 202 and a second rear connecting portion 203, the second front connecting portion 201 and the second rear connecting portion 203 are fixed to the inner side of the rear longitudinal beam 9, and the second lower connecting portion 202 is fixed to the bottom of the rear longitudinal beam 9;

[0133] The front support bracket front lower flange 182, part of the bottom wall of the groove 91 and the first lower connecting part 172, the front support bracket rear lower flange 185, part of the bottom wall of the groove 91 and the first support part 101, the rear support bracket front lower flange 192, part of the bottom wall of the groove 91 and the first support part 101, the rear support bracket rear lower flange 195, part of the bottom wall of the groove 91 and the second lower connecting part 202 are stacked in three layers in the up-down direction to form a three-layer plate structure.

[0134] The first rear connecting part 173, part of the inner side wall of the groove 91 and the front support bracket front inner flange 183, the front support bracket rear outer flange 187, part of the outer side wall of the groove 91 and the front end of the second support part 102, the second front connecting part 201, part of the inner side wall of the groove 91 and the rear support bracket front inner flange 193, the rear support bracket front outer flange 194, part of the outer side wall of the groove 91 and the rear end of the second support part 102 are stacked in three layers in the inner-outer direction to form a three-layer plate structure.

[0135] The front support bracket 18 and the rear support bracket 19 of the longitudinal beam cancel the traditional structure of arranging multiple partitions in the groove 91 of the longitudinal beam and welding a long reinforcing plate on the bottom surface of the longitudinal beam, but integrate multiple dispersed partitions and are connected with the front cross beam connecting plate 17, the shock absorbing spring mounting bracket 10 and the rear cross beam connecting plate 20 to form a through force transmission path, which simplifies the structure, is beneficial to light weight, improves the overall stiffness mode of the longitudinal beam, particularly strengthens the shock absorbing spring damping area, and ensures the rear longitudinal beam 9 crash performance and prevents the rear longitudinal beam 9 from bending.

[0136] In an embodiment, as shown in Figure 5 The reinforcing member 21 is fixed (such as clamped) with the reinforcing plate connecting plate 6 before foaming, and the reinforcing member 21 connects the reinforcing plate connecting plate 6, the rear wheel cover inner plate 4 and the floor panel 11 after foaming.

[0137] During assembly, the reinforcing member 21 is first fixed with the reinforcing plate connecting plate 6 to realize the positioning of the reinforcing member 21 on the body-in-white, and then the reinforcing member 21 is foamed after the body-in-white is electrocoated, so that the reinforcing member 21 connects the reinforcing plate connecting plate 6, the rear wheel cover inner plate 4 and the floor panel 11 after foaming, thereby realizing the reinforcement of the joint between the rear wheel cover and the rear floor, improving the bending and torsional stiffness of the rear wheel cover (including the rear wheel cover inner plate 4, the rear wheel cover inner reinforcing plate 5, the reinforcing plate connecting plate 6 and the rear shock absorber mounting plate 7, etc.), and the entire rear wheel cover can disperse the force upward and downward, which is beneficial to improving the bending and torsional stiffness mode of the body-in-white and the dynamic stiffness of the rear shock absorber fixing point.

[0138] In addition, the rear structure of the vehicle body further includes a longitudinal beam rear section 22 which is overlapped with the rear longitudinal beam 9.

[0139] In another aspect, the present application also provides a vehicle including the aforementioned vehicle body rear structure.

[0140] The above only shows the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vehicle body rear structure characterized by comprising: The rear wheel cover inner plate and the rear shock absorber mounting plate are fixed to the inner side of the rear wheel cover inner plate. The rear wheel cover inner plate and the rear shock absorber mounting plate enclose a force transmission cavity extending in the up-down direction. The rear longitudinal beam is provided with a groove penetrating through the front and rear ends and opening upward. The rear longitudinal beam is provided with a groove penetrating through the front and rear ends and opening upward. The front cross beam connecting plate, the longitudinal beam front support bracket, the shock absorber spring mounting bracket, the longitudinal beam rear support bracket and the rear cross beam connecting plate are arranged in sequence in the front-rear direction, and two adjacent structures are overlapped in the front-rear direction. The rear longitudinal beam is partially clamped between two adjacent structures, and the two adjacent structures are fixed to the part of the rear longitudinal beam, to realize the front-rear overlap. The rear wheel cover inner plate and the rear shock absorber mounting plate enclose a force transmission cavity extending in the up-down direction.

2. The vehicle body rear structure according to claim 1, characterized by The rear longitudinal beam is provided with a groove penetrating through the front and rear ends and opening upward.

3. The vehicle body rear structure according to claim 1, characterized by The front cross beam connecting plate, the longitudinal beam front support bracket, the shock absorber spring mounting bracket, the longitudinal beam rear support bracket and the rear cross beam connecting plate are arranged in sequence in the front-rear direction, and two adjacent structures are overlapped in the front-rear direction.

4. The vehicle body rear structure according to claim 1, characterized by The rear longitudinal beam is partially clamped between two adjacent structures, and the two adjacent structures are fixed to the part of the rear longitudinal beam, to realize the front-rear overlap.

5. The vehicle body rear structure according to claim 1, characterized by The rear wheel cover inner plate and the rear shock absorber mounting plate enclose a force transmission cavity extending in the up-down direction. The rear longitudinal beam is provided with a groove penetrating through the front and rear ends and opening upward. The front cross beam connecting plate, the longitudinal beam front support bracket, the shock absorber spring mounting bracket, the longitudinal beam rear support bracket and the rear cross beam connecting plate are arranged in sequence in the front-rear direction, and two adjacent structures are overlapped in the front-rear direction. The rear longitudinal beam is partially clamped between two adjacent structures, and the two adjacent structures are fixed to the part of the rear longitudinal beam, to realize the front-rear overlap.

6. The vehicle body rear structure according to claim 5, characterized by The front mounting bracket of the trailing arm comprises a front mounting bracket body, a front mounting bracket upper turn-up edge arranged on the upper side of the front mounting bracket body, a front mounting bracket lower turn-up edge arranged on the lower side of the front mounting bracket body, a front mounting bracket inner turn-up edge arranged on the inner side of the front mounting bracket body, and a front mounting bracket outer turn-up edge arranged on the outer side of the front mounting bracket body; The front mounting bracket upper turn-up edge is fixed to the top of the inner side of the rear longitudinal beam, the floor panel and the rear section of the rocker panel; The front mounting bracket lower turn-up edge is fixed to the bottom wall of the groove, and the front mounting bracket inner turn-up edge is fixed to the inner side wall of the groove; The lower end of the front mounting bracket outer turn-up edge is fixed to the outer side wall of the groove, and the upper end is fixed to the rear section of the rocker panel.

7. The vehicle body rear structure according to claim 5, characterized by The rear mounting bracket of the trailing arm comprises a rear mounting bracket body, a rear mounting bracket upper turn-up edge arranged on the upper side of the rear mounting bracket body, a rear mounting bracket lower turn-up edge arranged on the lower side of the rear mounting bracket body, a rear mounting bracket inner turn-up edge arranged on the inner side of the rear mounting bracket body, and a rear mounting bracket outer turn-up edge arranged on the outer side of the rear mounting bracket body; The rear mounting bracket upper turn-up edge is fixed to the inner side of the rear longitudinal beam, the floor panel and the rear section of the rocker panel; The rear mounting bracket lower turn-up edge is fixed to the bottom wall of the groove, and the rear mounting bracket inner turn-up edge is fixed to the inner side wall of the groove; The lower end of the rear mounting bracket outer turn-up edge is fixed to the outer side wall of the groove, and the upper end is fixed to the rear section of the rocker panel.

8. The vehicle body rear structure according to claim 6, characterized by The rear mounting bracket lower turn-up edge is folded backward; the rear mounting bracket upper turn-up edge comprises an inner turn-up edge section and an outer turn-up edge section located on the outer side of the inner turn-up edge section, the inner turn-up edge section is folded forward, the outer turn-up edge section is folded backward, the rear upper turn-up edge of the outer turn-up edge section is arranged on the outer side wall of the groove, and the outer side of the outer turn-up edge section is fixed to the rear section of the rocker panel.

9. The vehicle body rear structure according to claim 1, characterized by The first part of the front support bracket of the longitudinal beam, the first part of the rear longitudinal beam and the first part of the front cross beam connecting plate are stacked and fixed in the up-down direction; The second part of the front cross beam connecting plate, the second part of the rear longitudinal beam and the second part of the front support bracket of the longitudinal beam are stacked and fixed in the inner-outer direction; The third part of the front support bracket of the longitudinal beam, the third part of the rear longitudinal beam and the first part of the shock absorbing spring mounting bracket are stacked and fixed in the up-down direction; The fourth part of the front support bracket of the longitudinal beam, the fourth part of the rear longitudinal beam and the second part of the shock absorbing spring mounting bracket are stacked and fixed in the inner-outer direction; The first part of the rear support bracket of the longitudinal beam, the fifth part of the rear longitudinal beam and the third part of the shock absorbing spring mounting bracket are stacked and fixed in the up-down direction; The second part of the rear support bracket of the longitudinal beam, the sixth part of the rear longitudinal beam and the fourth part of the shock absorbing spring mounting bracket are stacked and fixed in the inner-outer direction; The first part of the rear cross beam connecting plate, the seventh part of the rear longitudinal beam and the third part of the rear support bracket of the longitudinal beam are stacked and fixed in the inner-outer direction; The fourth part of the rear support bracket of the longitudinal beam, the eighth part of the rear longitudinal beam and the second part of the rear cross beam connecting plate are stacked and fixed in the up-down direction.

10. The vehicle body rear structure according to claim 1, characterized by Also included are a reinforcement and a floor panel, the reinforcement being fixed to the reinforcement panel web before foaming, the reinforcement connecting the reinforcement panel web, the rear wheel house inner panel and the floor panel after foaming.

11. A vehicle characterized by comprising: The vehicle body rear structure according to any one of claims 1 to 10 is included.

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