CN119659764A - Vehicle body rear structure and vehicle - Google Patents
Vehicle body rear structure and vehicle Download PDFInfo
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- CN119659764A CN119659764A CN202311191745.6A CN202311191745A CN119659764A CN 119659764 A CN119659764 A CN 119659764A CN 202311191745 A CN202311191745 A CN 202311191745A CN 119659764 A CN119659764 A CN 119659764A
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Abstract
本发明涉及一种车身后部结构及车辆，该车身后部结构包括顶盖后横梁、左侧围骨架、右侧围骨架、衣帽架及后地板上横梁，所述衣帽架包括衣帽架主体、连接在所述衣帽架主体的前侧的衣帽架前横梁及连接在所述衣帽架主体的后侧的衣帽架后横梁，所述顶盖后横梁位于衣帽架后横梁的前方，所述衣帽架在车高方向上位于所述顶盖后横梁与后地板上横梁之间。该车身后部结构，所有的环形传力框架彼此连接，形成多个环形传力框架的传递路径连续的车身后部结构，大大提升了整车弯曲、扭转刚度及模态。
The present invention relates to a vehicle body rear structure and a vehicle, the vehicle body rear structure comprises a roof rear cross beam, a left side frame, a right side frame, a coat rack and a rear floor upper cross beam, the coat rack comprises 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 rear floor upper cross beam in the vehicle height direction. In the vehicle body rear structure, all the annular force transmission frames are connected to each other to form a vehicle body rear structure with a continuous transmission path of multiple annular force transmission frames, which greatly improves the bending and torsional stiffness and mode of the whole vehicle.
Description
Technical Field
The invention belongs to the technical field of vehicle bodies, and particularly relates to a vehicle body rear structure and a vehicle.
Background
In the existing vehicle body rear frame, a vertical annular force transmission frame structure is generally constructed only at the positions of the C column and/or the D column, the annular force transmission frame is less and discontinuous, the bending rigidity and the torsional rigidity of the whole vehicle are poor, and the mode is low.
Disclosure of Invention
The invention aims to solve the technical problem that the bending rigidity and the torsional rigidity of the whole vehicle are poor in the existing rear frame of the vehicle body, and provides a rear structure of the vehicle body and the vehicle.
In order to solve the technical problems, in one aspect, the embodiment of the invention provides a vehicle body rear part structure, which comprises a top cover rear cross beam, a left side wall framework, a right side wall framework, a hat rack and a rear floor upper cross beam, wherein the hat rack comprises a hat rack main body, a hat rack front cross beam connected to the front side of the hat rack main body and a hat rack rear cross beam connected to the rear side of the hat rack main body, the top cover rear cross beam is positioned in front of the hat rack rear cross beam, and the hat rack is positioned between the top cover rear cross beam and the rear floor upper cross beam in the vehicle height direction;
The top cover rear cross beam is connected between the upper side of the left side wall framework and the upper side of the right side wall framework, the hat rack front cross beam is connected between the left side wall framework and the right side wall framework, the hat rack rear cross beam is connected between the rear side of the left side wall framework and the rear side of the right side wall framework, and the rear floor upper cross beam is connected between the lower side of the left side wall framework and the lower side of the right side wall framework;
The hat rack comprises a top cover rear cross beam, a left side wall framework, a hat rack rear cross beam and a right side wall framework, wherein the top cover rear cross beam, the left side wall framework, the hat rack rear cross beam and the right side wall framework are sequentially connected to form a first annular force transmission frame, the hat rack front cross beam, the left side wall framework, the hat rack rear cross beam and the right side wall framework are sequentially connected to form a second annular force transmission frame, the top cover rear cross beam, the left side wall framework, the hat rack front cross beam and the right side wall framework are sequentially connected to form a third annular force transmission frame, and the hat rack front cross beam, the left side wall framework, the floor upper cross beam and the right side wall framework are sequentially connected to form a fourth annular force transmission frame.
Optionally, the left side frame comprises a left side first upright post, a left side second upright post, a left wheel cover assembly and a left side upper edge beam connected with the upper ends of the left side first upright post and the left side second upright post, and the right side frame comprises a right side first upright post, a right side second upright post, a right wheel cover assembly and a right side upper edge beam connected with the upper ends of the right side first upright post and the right side second upright post;
the left side upper edge beam is provided with a left side upper edge beam front section and a left side upper edge beam rear section, and the right side upper edge beam is provided with a right side upper edge beam front section and a right side upper edge beam rear section.
Optionally, the rear roof beam is connected between the front end of the rear left side roof rail section and the front end of the rear right side roof rail section, the front hat rack beam is connected between the upper side of the left wheel cover assembly and the upper side of the right wheel cover assembly, the rear hat rack beam is connected between the rear end of the rear left side roof rail section and the rear end of the rear right side roof rail section, and the rear floor upper beam is connected between the lower side of the left wheel cover assembly and the lower side of the right wheel cover assembly;
The top cover rear cross beam, the left side upper edge beam rear section, the hat rack rear cross beam and the right side upper edge beam rear section are sequentially connected to form the first annular force transmission frame, the hat rack front cross beam, the left side wall second upright post, the hat rack rear cross beam and the right side wall second upright post are sequentially connected to form the second annular force transmission frame, the top cover rear cross beam, the left side wall second upright post, the hat rack front cross beam and the right side wall second upright post are sequentially connected to form the third annular force transmission frame, and the hat rack front cross beam, the left wheel cover assembly, the floor upper cross beam and the right wheel cover assembly are sequentially connected to form the fourth annular force transmission frame.
Optionally, the left wheel cover assembly comprises a left wheel cover and a left wheel cover upright post connected to the inner side of the left wheel cover, and the right wheel cover assembly comprises a right wheel cover and a right wheel cover upright post connected to the inner side of the right wheel cover;
The hat rack front cross beam, the left wheel cover upright post, the floor upper cross beam and the right wheel cover upright post are sequentially connected to form the fourth annular force transmission frame.
Optionally, the floor entablature includes floor entablature main part, first connecting piece and second connecting piece, the floor entablature main part is connected between left wheel casing and the right wheel casing, first connecting piece is connected between the left end of floor entablature main part and the lower extreme of left wheel casing stand, the second connecting piece is connected between the right-hand member of floor entablature main part with between the lower extreme of right wheel casing stand.
Optionally, a first beam extends from the upper end of the left wheel cover upright towards the hat rack front beam, and the first beam is connected with the left end of the hat rack front beam;
the upper end of the right wheel cover upright post extends out of the second cross beam towards the hat rack front cross beam, and the second cross beam is connected with the right end of the hat rack front cross beam.
Optionally, a first window is arranged between the left side wall first upright post and the left side wall second upright post, and the first window is spanned by the first longitudinal beam which is connected between the left side wall first upright post and the left side wall second upright post;
the novel side frame comprises a left side wall and a right side wall, and is characterized in that a second window is arranged between the right side wall first upright post and the right side wall second upright post, and the novel side frame further comprises a second longitudinal beam which is connected between the left side wall second upright post and the right side wall second upright post and spans across the second window.
Optionally, the device further comprises a top cover front cross beam, wherein the top cover front cross beam is connected between the left side upper edge beam front section and the right side upper edge beam front section, and the top cover front cross beam, the left side upper edge beam, the top cover rear cross beam and the right side upper edge beam enclose to form a mounting area.
Optionally, the top cover front cross beam, the left side upper side beam, the right side upper side beam, the hat rack rear cross beam and the top cover rear cross beam form a fifth annular force transmission frame.
Optionally, the top cover rear cross beam, the left side wall second upright post, the floor upper cross beam, the right side wall second upright post and the hat rack front cross beam form a sixth annular force transmission frame.
Optionally, the hat rack main part is echelonment, the hat rack main part includes preceding curb plate, first roof, well curb plate and second roof, first roof is connected the upside of preceding curb plate with between the downside of well curb plate, the front side of second roof with the upside of well curb plate is connected, the hat rack front cross member is connected the downside of the rear side of preceding curb plate and first roof, the hat rack rear cross member is connected the rear side of second roof.
According to the vehicle body rear structure, the top cover rear cross beam, the left side wall framework, the hat rack rear cross beam and the right side wall framework are sequentially connected to form the first annular force transmission frame, the hat rack front cross beam, the left side wall framework, the hat rack rear cross beam and the right side wall framework are sequentially connected to form the second annular force transmission frame, the top cover rear cross beam, the left side wall framework, the hat rack front cross beam and the right side wall framework are sequentially connected to form the third annular force transmission frame, and the hat rack front cross beam, the left side wall framework, the floor upper cross beam and the right side wall framework are sequentially connected to form the fourth annular force transmission frame. The first annular force transmission frame is intersected with the second annular force transmission frame on the hat rack rear cross beam, the first annular force transmission frame is intersected with the third annular force transmission frame on the top cover rear cross beam, the second annular force transmission frame, the third annular force transmission frame and the fourth annular force transmission frame are intersected with the hat rack front cross beam, all the annular force transmission frames are connected with each other to form a vehicle body rear structure with continuous transmission paths of the annular force transmission frames, bending, torsional rigidity and mode of the whole vehicle are greatly improved, excitation generated by the rear shock absorber can be fully decomposed and absorbed, noise and vibration of the rear portion of the vehicle body are effectively reduced, riding comfort is improved, and the chassis response stability is fast.
Based on simulation analysis, compared with a certain level of vehicle type, the vehicle adopting the vehicle body rear structure has the advantages that the bending rigidity, the torsional rigidity and the modal are obviously improved, the torsional rigidity reaches 25600 Nm/DEG, the performance is improved by 25%, the bending rigidity performance is improved by 20%, the NVH performance is improved by 50%, the modal is improved by 10%, the rigidity of the mounting point of the auxiliary frame is improved by 20%, the weight of the vehicle body is reduced by about 10kg, and the cost is saved by about 200 yuan.
In addition, in the aspect of safety, under the condition that only two top cover beams (a top cover front beam and a top cover rear beam) are arranged at front and back, the requirements of CIASI on all excellent (G) performance of pressing, side collision and small offset collision can be met.
On the other hand, the embodiment of the invention also provides a vehicle, which comprises the vehicle body rear structure.
Drawings
Fig. 1 is a schematic view of a vehicle body rear structure provided by an embodiment of the present invention;
FIG. 2 is a schematic view of a left side frame of a vehicle body rear structure according to an embodiment of the present invention;
FIG. 3 is a schematic view of a right side frame of a vehicle body rear structure according to an embodiment of the present invention;
fig. 4 is a schematic view of a hat rack of a vehicle body rear structure provided by an embodiment of the present invention;
Fig. 5 is a schematic view of a roof rear cross member of a vehicle body rear structure provided in an embodiment of the invention;
fig. 6 is a schematic view of a roof front cross member of a vehicle body rear structure provided in an embodiment of the invention;
Fig. 7 is a schematic view of a floor cross member of a vehicle body rear structure according to an embodiment of the present invention.
Reference numerals in the specification are as follows:
R1, a first annular force transmission frame, R2, a second annular force transmission frame, R3, a third annular force transmission frame, R4, a fourth annular force transmission frame, D, a mounting area;
1. A top cover rear cross member;
2. A left side frame; 21, a left side wall first upright post, 22, a left side wall second upright post, 23, a left wheel cover assembly, 231, a left wheel cover, 24, a left side upper side beam, 241, a left side upper side beam front section, 242, a left side upper side beam rear section, 25, a first window, 26, a first longitudinal beam;
3. a right side frame; 31, a first upright column of a right side wall, 32, a second upright column of a right side wall, 33, a right wheel cover assembly, 331, a right wheel cover, 332, a right wheel cover upright column, 3321, a second cross beam, 34, a right side upper side beam, 341, a front section of a right side upper side beam, 342, a rear section of a right side upper side beam, 35, a second window, 36 and a second longitudinal beam;
4. The hat rack comprises a hat rack body 41, a hat rack main body 411, a front side plate 412, a first top plate 413, a middle side plate 414, a second top plate 42, a hat rack front beam 43 and a hat rack rear beam;
5. A rear floor upper cross member; 51, floor upper beam main body, 52, first connecting piece, 53, second connecting piece;
6. and a top cover front cross beam.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Front, rear, left, right, up, down are herein the orientations of the vehicle when 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).
Referring to fig. 1 to 7, the vehicle body rear structure provided by the embodiment of the invention comprises a top cover rear cross beam 1, a left side frame 2, a right side frame 3, a hat rack 4 and a rear floor upper cross beam 5, wherein the hat rack 4 comprises a hat rack main body 41, a hat rack front cross beam 42 connected to the front side of the hat rack main body 41 and a hat rack rear cross beam 43 connected to the rear side of the hat rack main body 41, the top cover rear cross beam 1 is positioned in front of the hat rack rear cross beam 43, and the hat rack 4 is positioned between the top cover rear cross beam 1 and the rear floor upper cross beam 5 in the vehicle height direction.
The top cover rear cross beam 1 is connected between the upper side of the left side wall framework 2 and the upper side of the right side wall framework 3, the hat rack front cross beam 42 is connected between the left side wall framework 2 and the right side wall framework 3, the hat rack rear cross beam 43 is connected between the rear side of the left side wall framework 2 and the rear side of the right side wall framework 3, and the rear floor upper cross beam 5 is connected between the lower side of the left side wall framework 2 and the lower side of the right side wall framework 3. The rear floor upper cross member 5 is adapted to be welded to the rear floor.
Referring to fig. 1, the top cover rear cross member 1, the left side frame 2, the hat rack rear cross member 43 and the right side frame 3 are sequentially connected to form a first annular force transmission frame R1, the hat rack front cross member 42, the left side frame 2, the hat rack rear cross member 43 and the right side frame 3 are sequentially connected to form a second annular force transmission frame R2, the top cover rear cross member 1, the left side frame 2, the hat rack front cross member 42 and the right side frame 3 are sequentially connected to form a third annular force transmission frame R3, and the hat rack front cross member 42, the left side frame 2, the floor upper cross member 5 and the right side frame 3 are sequentially connected to form a fourth annular force transmission frame R4.
The first annular force transmission frame R1 gradually inclines downwards from front to back, and plays a role in Z-direction yaw resistance.
The second annular force transmission frame R2 is approximately parallel to the horizontal plane or forms a smaller included angle, and plays a role in resisting yaw in the Z direction.
The third annular force transmission frame R3 is approximately parallel to the vertical surface or forms a smaller included angle, and plays a role in resisting torsion in the Y direction.
The fourth annular force transfer frame R4 is substantially parallel to or at a small angle to the vertical plane.
In an embodiment, referring to fig. 1 to 3, the left side frame 2 comprises a left side first pillar 21, a left side second pillar 22, a left wheel cover assembly 23 and a left side upper beam 24 connected to the upper ends of the left side first pillar 21 and the left side second pillar 22, the right side frame 3 comprises a right side first pillar 31, a right side second pillar 32, a right wheel cover assembly 33 and a right side upper beam 34 connected to the upper ends of the right side first pillar 31 and the right side second pillar 32, the left wheel cover assembly 23 is connected to the lower end of the left side second pillar 22, the right wheel cover assembly 33 is connected to the lower end of the right side second pillar 32, the left side upper beam 24 has a left side upper beam front section and a left side upper beam rear section 242, and the right side upper beam 34 has a right side upper beam front section 341 and a right side upper beam rear section 342.
In an embodiment, referring to fig. 1 to 3, the roof rear cross member 1 is connected between the front end of the left side roof rail rear section 242 and the front end of the right side roof rail rear section 342, the hat rack front cross member 42 is connected between the upper side of the left wheel housing assembly 23 and the upper side of the right wheel housing assembly 33, the hat rack rear cross member 43 is connected between the rear end of the left side roof rail rear section 242 and the rear end of the right side roof rail rear section 342, and the rear floor upper cross member 5 is connected between the lower side of the left wheel housing assembly 23 and the lower side of the right wheel housing assembly 33. In this way, the top cover rear cross member 1, the left side upper side beam rear section 242, the hat rack rear cross member 43 and the right side upper side beam rear section 342 are sequentially connected to form the first annular force transmission frame R1, the hat rack front cross member 42, the left side wall second upright 22, the hat rack rear cross member 43 and the right side wall second upright 32 are sequentially connected to form the second annular force transmission frame, the top cover rear cross member 1, the left side wall second upright 22, the hat rack front cross member 32 and the right side wall second upright 32 are sequentially connected to form the third annular force transmission frame R3, and the hat rack front cross member 42, the left wheel cover assembly 23, the floor upper cross member 5 and the right wheel cover assembly 24 are sequentially connected to form the fourth annular force transmission frame R4.
In an embodiment, referring to fig. 1 to 3, the left wheel cover assembly 23 includes a left wheel cover 231 and a left wheel cover post (not visible in the drawings) connected to the inner side of the left wheel cover 231, the right wheel cover assembly 33 includes a right wheel cover 331 and a right wheel cover post 332 connected to the inner side of the right wheel cover 331, the hat rack front beam 42 is connected between the upper end of the left wheel cover post and the upper end of the right wheel cover post 332, the floor upper beam 5 is connected between the lower end of the left wheel cover post and the lower end of the right wheel cover post 332, and the hat rack front beam 42, the left wheel cover post, the floor upper beam 5 and the right wheel cover post 332 are sequentially connected to form the fourth annular force transmission frame R4. The left wheel cover upright post is a reinforcing piece of the left wheel cover 231, so that when the left wheel cover 231 collides, impact force can be transmitted to the fourth annular force transmission frame R4 through the left wheel cover upright post, and then the fourth annular force transmission frame R4 diverges to the first annular force transmission frame R1, the second annular force transmission frame R2 and the first annular force transmission frame R3, so that the rear part of the whole vehicle body is uniformly stressed, and the invasion to the passenger cabin is avoided. The right wheel cover post 332 is a reinforcement for the left wheel cover 331. Like this, when right wheel cover 331 bumps, impact force can pass through right wheel cover stand 332 and transmit to fourth annular biography power frame R4, and by fourth annular biography power frame R4 to first annular biography power frame R1, second annular biography power frame R2, first annular biography power frame R3 diverges, and whole automobile body rear portion atress is even, avoids the invasion volume to the passenger cabin too big.
In an embodiment, referring to fig. 1 and 7, the floor upper beam 5 includes a floor upper beam body 51, a first connecting member 52 and a second connecting member 53, the floor upper beam body 51 is connected between the left wheel cover 231 and the right wheel cover 331, the first connecting member 52 is connected between the left end of the floor upper beam body 51 and the lower end of the left wheel cover upright, and the second connecting member 53 is connected between the right end of the floor upper beam body 51 and the lower end of the right wheel cover upright 332. In this way, the connection area between the floor upper cross member 5 and the left wheel cover assembly 23 can be increased, the connection area between the floor upper cross member 5 and the right wheel cover assembly 33 can be increased, and the connection strength between the floor upper cross member 5 and the left and right wheel cover assemblies 23, 33 can be increased.
In one embodiment, the upper end of the left wheel housing upright extends toward the hatrack front cross member 42 by a first cross member (not visible in the figures) that is connected to the left end of the hatrack front cross member 42. Referring to fig. 1 and 3, the upper end of the right wheel cover upright 332 extends out of the second cross member 3321 toward the hat rack front cross member 42, and the second cross member 3321 is connected to the right end of the hat rack front cross member 42.
In an embodiment, referring to fig. 1 and 2, a first window 25 (commonly referred to as a triangular window) is disposed between the left side first pillar 21 and the left side second pillar 22, and a first longitudinal beam 26 is connected between the left side first pillar 21 and the left side second pillar 22 and spans the first window 25. The strength at the first window 25 is reinforced by the first side member 26, and the strength of the left side frame 2 is reinforced.
In one embodiment, referring to fig. 3, a second window 35 is disposed between the right side wall first pillar 31 and the right side wall second pillar 32, and a second longitudinal beam 36 is further included, and the second longitudinal beam 36 is connected between the left side wall second pillar 31 and the right side wall second pillar 32 and spans the second window 35. The strength at the second window 35 is reinforced by the second stringers 36, reinforcing the strength of the right side frame 3.
In an embodiment, referring to fig. 1, the roof front beam 6 is further included, the roof front beam 6 is connected between the left side upper side beam front section 241 and the right side upper side beam front section 341, and the roof front beam 6, the left side upper side beam 24, the roof rear beam 1 and the right side upper side beam 34 enclose a mounting area D suitable for mounting the panoramic backdrop. Therefore, the panoramic backdrop can be configured, the skylight opening is large, the visual field is wide, and the experience is good.
In an embodiment, referring to fig. 5, the roof rear rail 1 is a beam having a closed cross section, and the interior of the roof rear rail 1 has an interior cavity. Compared with the existing open-type top cover beam, the beam has higher rigidity and strength, and is not easy to bend in collision. The rear cross member 1 of the roof has flanges at both ends in the longitudinal direction for welding with the left side roof rail 24 and the right side roof rail 34.
In one embodiment, referring to fig. 6, the roof front rail 6 is a beam having a closed cross section, with an interior cavity inside the roof front rail 6. Compared with the existing open-type top cover beam, the beam has higher rigidity and strength, and is not easy to bend in collision. The front cross member 6 has flanges at both ends in the longitudinal direction for welding with the left side roof rail 24 and the right side roof rail 34.
In one embodiment, referring to fig. 1, the front roof rail 6, the left side roof rail 24, the right side roof rail 34, the hat rack rear rail 43 and the rear roof rail 1 form a fifth annular force transmission frame R5. The fifth annular force transmission frame R5 is shaped like a Chinese character 'ri', and plays a role in bending resistance and torsion resistance in three directions X, Y, Z.
In an embodiment, referring to fig. 1, the rear roof rail 1 is located at the rear of the second row seat in the X direction, so that the rear roof rail 1 is far away from the heads of the passengers in the two rows, and the head space of the passengers in the two rows is sufficient, and the riding comfort is high.
In an embodiment, referring to fig. 1, the rear roof rail 1, the left side wall second pillar 22, the floor upper rail 5, the right side wall second pillar 32, and the hat rack front rail 42 form a sixth annular force transmission frame R6. The sixth annular force transmission frame R6 is in a Chinese character 'ri' shape and plays a role in Y-direction composite torsion resistance.
In an embodiment, referring to fig. 4, the hat rack body 41 is stepped, the hat rack 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 with the upper side of the middle side plate 413, the hat rack front cross member 42 is connected with the rear side of the front side plate 411 and the lower side of the first top plate 412, and the hat rack rear cross member 43 is connected with the rear side of the second top plate 414. The second top panel 414 has a larger width for placement of items. The hat rack front cross member 42 is provided behind the front side plate 411 of the hat rack body 41 to avoid encroaching on the passenger compartment space.
Of course, in some embodiments, the front side panel 411, the first top panel 412 may also be part of the hatrack front cross-member 42.
According to the vehicle body rear part structure, the left side wall framework 2, the right side wall framework 3, the hat rack 4 and the floor upper cross beam 5 are spliced into the vehicle body framework sub-assembly through the connection modes of welding, screw connection, structural adhesive and the like, and the vehicle body framework sub-assembly is spliced into the vehicle body rear part structure through the welding and screw connection with the top cover rear cross beam 1 and the top cover front cross beam 6.
Referring to fig. 1, the left side frame has 7 nodes, namely a first node P1, a second node P2, a third node P3, a fourth node P4, a fifth node P5 and a sixth node P7. The first node P1 is a connection point between the left side wall first upright 21 and the left side upper beam 24, the second node P2 is a connection point between the left side wall first upright 21 and the first longitudinal beam 26, the third node P3 is a connection point between the rear floor upper beam and the left side wheel cover assembly 23, the fourth node P4 is a connection point between the top cover rear beam 1 and the left side upper beam 24, the fifth node P5 is a connection point between the left side wall second upright 22 and the second longitudinal beam 26, the sixth node P6 is a connection point between the hat rack front beam 42 and the right side wall second upright 22, and the seventh node P7 is a connection point between the hat rack rear beam 43 and the left side upper beam 24. The right side frame 3 is also provided with 7 point nodes, and the 7 nodes on the right side frame 3 and the seven nodes on the left side frame 2 are symmetrically arranged.
Each node is reinforced through a welded joint, so that the effect of reinforcing the structural strength of the whole rear part of the automobile body is achieved, and the structural stability of the whole rear part of the automobile body is improved. The joint means that the two parts are welded by flanging and lapping or nested welding, and the corresponding beam is provided with an inner cavity (force transmission cavity).
In the vehicle body rear structure of the embodiment of the invention, the first annular force transmission frame R1 and the second annular force transmission frame R2 intersect at the hat rack rear cross beam 43 (the hat rack rear cross beam 43 is a shared 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 top cover rear cross beam 1 (the top cover rear cross beam 1 is a shared 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 R4 intersect at the hat rack front cross beam 42 (the hat rack front cross beam 42 is a shared component of the second annular force transmission frame R2, the third annular force transmission frame R3 and the fourth annular force transmission frame R4), and all the annular force transmission frames are connected with each other to form a vehicle body rear structure with continuous transmission paths, so that the bending, torsional rigidity and the mode of the vehicle body rear structure are greatly improved, the excitation generated by the vibration absorber is fully decomposed and absorbed, the noise and the vehicle rear chassis is effectively improved, the comfort and the chassis is stable and the vibration response performance is fast.
Based on simulation analysis, compared with a certain level of vehicle type, the vehicle adopting the vehicle body rear structure provided by the embodiment of the application has the advantages that the bending stiffness, the torsional stiffness and the modal are obviously improved, the torsional stiffness reaches 25600 Nm/DEG, 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 mounting point stiffness of the auxiliary frame is improved by 20%, the weight of the vehicle body is reduced by about 10kg, and the cost is saved by about 200 yuan.
In addition, in terms of safety, when only two roof cross members (the roof front cross member 6 and the roof rear cross member 1) are provided, the requirements that CIASI are excellent in all of the pressing, side impact, and small offset impact performance (G) can be satisfied.
In addition, the embodiment of the invention also provides a vehicle, which comprises the vehicle body rear structure of the embodiment.
In one embodiment, the vehicle is a sedan, in particular a sedan with a large-sized panoramic backdrop.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (12)
1. The utility model provides a rear structure of a vehicle body, its characterized in that includes top cap rear cross beam, left side wall skeleton, right side wall skeleton, hat rack and back floor entablature, the hat rack includes hat rack main part, connects the hat rack front cross beam of the front side of hat rack main part and connects the hat rack rear cross beam of the rear side of hat rack main part, top cap rear cross beam is located the place ahead of hat rack rear cross beam, the hat rack is located in the car height direction between top cap rear cross beam and the back floor entablature;
The top cover rear cross beam is connected between the upper side of the left side wall framework and the upper side of the right side wall framework, the hat rack front cross beam is connected between the left side wall framework and the right side wall framework, the hat rack rear cross beam is connected between the rear side of the left side wall framework and the rear side of the right side wall framework, and the rear floor upper cross beam is connected between the lower side of the left side wall framework and the lower side of the right side wall framework;
The hat rack comprises a top cover rear cross beam, a left side wall framework, a hat rack rear cross beam and a right side wall framework, wherein the top cover rear cross beam, the left side wall framework, the hat rack rear cross beam and the right side wall framework are sequentially connected to form a first annular force transmission frame, the hat rack front cross beam, the left side wall framework, the hat rack rear cross beam and the right side wall framework are sequentially connected to form a second annular force transmission frame, the top cover rear cross beam, the left side wall framework, the hat rack front cross beam and the right side wall framework are sequentially connected to form a third annular force transmission frame, and the hat rack front cross beam, the left side wall framework, the floor upper cross beam and the right side wall framework are sequentially connected to form a fourth annular force transmission frame.
2. The vehicle body rear structure according to claim 1, wherein the left side frame comprises a left side first pillar, a left side second pillar, a left wheel cover assembly and a left side upper edge beam connected to the upper ends of the left side first pillar and the left side second pillar, the right side frame comprises a right side first pillar, a right side second pillar, a right wheel cover assembly and a right side upper edge beam connected to the upper ends of the right side first pillar and the right side second pillar;
the left side upper edge beam is provided with a left side upper edge beam front section and a left side upper edge beam rear section, and the right side upper edge beam is provided with a right side upper edge beam front section and a right side upper edge beam rear section.
3. The vehicle body rear structure according to claim 2, wherein the roof rear cross member is connected between a front end of the left side roof rail rear section and a front end of the right side roof rail rear section, the hat rack front cross member is connected between an upper side of the left wheel cover assembly and an upper side of the right wheel cover assembly, the hat rack rear cross member is connected between a rear end of the left side roof rail rear section and a rear end of the right side roof rail rear section, and the rear floor upper cross member is connected between a lower side of the left wheel cover assembly and a lower side of the right wheel cover assembly;
The top cover rear cross beam, the left side upper edge beam rear section, the hat rack rear cross beam and the right side upper edge beam rear section are sequentially connected to form the first annular force transmission frame, the hat rack front cross beam, the left side wall second upright post, the hat rack rear cross beam and the right side wall second upright post are sequentially connected to form the second annular force transmission frame, the top cover rear cross beam, the left side wall second upright post, the hat rack front cross beam and the right side wall second upright post are sequentially connected to form the third annular force transmission frame, and the hat rack front cross beam, the left wheel cover assembly, the floor upper cross beam and the right wheel cover assembly are sequentially connected to form the fourth annular force transmission frame.
4. The rear body structure according to claim 2, wherein the left wheel cover assembly comprises a left wheel cover and a left wheel cover upright connected to the inner side of the left wheel cover, and the right wheel cover assembly comprises a right wheel cover and a right wheel cover upright connected to the inner side of the right wheel cover;
The hat rack front cross beam, the left wheel cover upright post, the floor upper cross beam and the right wheel cover upright post are sequentially connected to form the fourth annular force transmission frame.
5. The vehicle body rear structure according to claim 4, wherein the floor upper cross member includes a floor upper cross member main body, a first connecting member and a second connecting member, the floor upper cross member main body being connected between the left wheel cover and the right wheel cover, the first connecting member being connected between a left end of the floor upper cross member main body and a lower end of the left wheel cover pillar, the second connecting member being connected between a right end of the floor upper cross member main body and a lower end of the right wheel cover pillar.
6. The vehicle body rear structure according to claim 4, wherein an upper end of the left wheel cover pillar extends out of a first cross member toward the hat rack front cross member, the first cross member being connected with a left end of the hat rack front cross member;
the upper end of the right wheel cover upright post extends out of the second cross beam towards the hat rack front cross beam, and the second cross beam is connected with the right end of the hat rack front cross beam.
7. The vehicle body rear structure according to claim 2, wherein a first window is provided between the left side wall first pillar and the left side wall second pillar; the first longitudinal beam is connected between the left side wall first upright post and the left side wall second upright post and spans the first window;
the novel side frame comprises a left side wall and a right side wall, and is characterized in that a second window is arranged between the right side wall first upright post and the right side wall second upright post, and the novel side frame further comprises a second longitudinal beam which is connected between the left side wall second upright post and the right side wall second upright post and spans across the second window.
8. The vehicle body rear structure according to claim 2, further comprising a roof front cross member connected between the left side roof rail front section and the right side roof rail front section, the roof front cross member, the left side roof rail, the roof rear cross member, and the right side roof rail enclosing to form a mounting area.
9. The vehicle body rear structure according to claim 2, wherein the roof front cross member, the left side roof side rail, the right side roof side rail, the hat rack rear cross member, and the roof rear cross member constitute a fifth annular force transmission frame.
10. The vehicle body rear structure according to claim 2, wherein the roof rear cross member, the left side wall second pillar, the floor upper cross member, the right side wall second pillar, and the hat rack front cross member constitute a sixth annular force transmission frame.
11. The vehicle body rear structure according to any one of claims 1 to 10, wherein the hatrack body is stepped, the hatrack body 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 an upper side of the front side plate and a lower side of the middle side plate, a front side of the second top plate is connected with an upper side of the middle side plate, the hatrack front cross member is connected to a rear side of the front side plate and a lower side of the first top plate, and the hatrack rear cross member is connected to a rear side of the second top plate.
12. A vehicle characterized by comprising the vehicle body rear structure according to any one of claims 1 to 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311191745.6A CN119659764A (en) | 2023-09-14 | 2023-09-14 | Vehicle body rear structure and vehicle |
| PCT/CN2024/088763 WO2025055329A1 (en) | 2023-09-14 | 2024-04-19 | Vehicle rear body structure, and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311191745.6A CN119659764A (en) | 2023-09-14 | 2023-09-14 | Vehicle body rear structure and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119659764A true CN119659764A (en) | 2025-03-21 |
Family
ID=95000788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311191745.6A Pending CN119659764A (en) | 2023-09-14 | 2023-09-14 | Vehicle body rear structure and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119659764A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203854736U (en) * | 2014-05-07 | 2014-10-01 | 奇瑞汽车股份有限公司 | Automobile parcel shelf reinforcing structure |
| CN213473297U (en) * | 2020-09-28 | 2021-06-18 | 广州汽车集团股份有限公司 | Automobile body rear portion structure and car |
| CN115959203A (en) * | 2023-01-03 | 2023-04-14 | 广州汽车集团股份有限公司 | Rear vehicle body structure and vehicle with same |
| CN220974340U (en) * | 2023-09-14 | 2024-05-17 | 广州汽车集团股份有限公司 | Vehicle body rear structure and vehicle |
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2023
- 2023-09-14 CN CN202311191745.6A patent/CN119659764A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203854736U (en) * | 2014-05-07 | 2014-10-01 | 奇瑞汽车股份有限公司 | Automobile parcel shelf reinforcing structure |
| CN213473297U (en) * | 2020-09-28 | 2021-06-18 | 广州汽车集团股份有限公司 | Automobile body rear portion structure and car |
| CN115959203A (en) * | 2023-01-03 | 2023-04-14 | 广州汽车集团股份有限公司 | Rear vehicle body structure and vehicle with same |
| CN220974340U (en) * | 2023-09-14 | 2024-05-17 | 广州汽车集团股份有限公司 | Vehicle body rear structure and vehicle |
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