CN111017039B - Automobile and floor frame structure thereof - Google Patents
Automobile and floor frame structure thereof Download PDFInfo
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- CN111017039B CN111017039B CN201811178399.7A CN201811178399A CN111017039B CN 111017039 B CN111017039 B CN 111017039B CN 201811178399 A CN201811178399 A CN 201811178399A CN 111017039 B CN111017039 B CN 111017039B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
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Abstract
本发明涉及一种汽车及其地板架构，其中，地板架构包括依次固定设置的上框架、地板面板和下框架；上框架包括中央通道端头、左通道梁和右通道梁；下框架包括左纵梁、右纵梁、第一横梁、第二横梁、左连接梁和右连接梁，左连接梁连接于左纵梁和第一横梁之间，右连接梁连接于右纵梁和第一横梁之间，且左连接梁和右连接梁均位于第一横梁的前侧；左通道梁和右通道梁分别位于第一横梁和第二横梁之间。该地板架构可在保证车身刚度和模态的情况下，提升车内空间，提高乘客的舒适性。
The invention relates to an automobile and its floor structure, wherein the floor structure includes an upper frame, a floor panel and a lower frame which are fixedly arranged in sequence; the upper frame includes a central channel end, a left channel beam and a right channel beam; the lower frame includes a left longitudinal The beam, the right longitudinal beam, the first transverse beam, the second transverse beam, the left connecting beam and the right connecting beam, the left connecting beam is connected between the left longitudinal beam and the first transverse beam, and the right connecting beam is connected between the right longitudinal beam and the first transverse beam. and the left connecting beam and the right connecting beam are both located on the front side of the first beam; the left channel beam and the right channel beam are respectively located between the first beam and the second beam. The floor structure can enhance the interior space and improve the comfort of passengers while ensuring the rigidity and mode of the body.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an automobile and a floor framework thereof.
Background
The floor of the traditional automobile is provided with a central channel, a seat crossbeam and a heel plate structure, so that the middle part and the rear part of the floor are provided with larger raised characteristics, and a manufacturer just utilizes the raised central channel characteristics to bear part of the energy absorption effect during full-width rigid wall collision and 40% offset collision of the automobile. Meanwhile, the central channel with the convex middle part is communicated with the heel plate to form a front-back through structure, and the two sides of the central channel are matched with the seat cross beams communicated with the doorsill from left to right to form a through structure in the width direction of the floor, so that the rigidity and the mode of the vehicle body can be improved by the formed frame.
The traditional floor structure has been developed for many years and the technology is mature, and is adopted by most manufacturers. However, these large raised features often encroach upon the user's space of use and placement, e.g., the center tunnel raised features take up the footfall space of the middle two-row middle passenger, causing discomfort to the middle passenger; the presence of the heel plate then limits the sliding function of the second row of seats, affecting the comfort of the vehicle for different customers.
Therefore, how to increase the space in the vehicle and improve the comfort of passengers under the condition of ensuring the rigidity and the mode of the vehicle body is a technical problem to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide an automobile and a floor framework thereof, which can improve the space in the automobile and improve the comfort of passengers under the condition of ensuring the rigidity and the mode of the automobile body.
In order to solve the above technical problems, the present invention provides a floor structure of an automobile, which includes an upper frame, a floor panel and a lower frame fixedly disposed in sequence; the upper frame comprises a central channel end, a left channel beam and a right channel beam; the lower frame comprises a left longitudinal beam, a right longitudinal beam, a first cross beam, a second cross beam, a left connecting beam and a right connecting beam, the left connecting beam is connected between the left longitudinal beam and the first cross beam, the right connecting beam is connected between the right longitudinal beam and the first cross beam, and the left connecting beam and the right connecting beam are both positioned on the front side of the first cross beam; the left channel beam and the right channel beam are respectively positioned between the first cross beam and the second cross beam.
Wherein, the front and back refer to the front and back direction of the automobile body, i.e. the front refers to the side facing the head of the automobile, the left and right refer to the left and right sides of the automobile body, specifically, in the floor structure, a left longitudinal beam and a left connecting beam, a right longitudinal beam and a right connecting beam respectively form a similar herringbone structure, the left and right sides have similar structures, the left connecting beam is connected between the left longitudinal beam and the first cross beam and is positioned at the front side of the first cross beam, at this time, when the front side of the left longitudinal beam is impacted, a part of the impact force will be transmitted along the axial direction of the left longitudinal beam, the other part of the impact force will be dispersed to the left connecting beam and transmitted to the first cross beam, similarly, the right side structure condition is similar, when the front side of the right longitudinal beam is impacted, a part of the impact force will be transmitted along the axial direction of the right longitudinal beam, the other part of the impact force will be dispersed to the right connecting beam and transmitted to the first cross beam, and form similar "mesh" style of calligraphy structure by first crossbeam, second crossbeam, left longeron, right longeron, left passageway roof beam and right passageway roof beam, first crossbeam and second crossbeam can resist displacement from beginning to end, effectively reduce the invasion volume of front portion in the collision, and simultaneously, first crossbeam has stronger vertical direction's bending resistance, can prevent this regional dive in the front portion collision process.
Due to the combined action of the upper frame and the lower frame, the rigidity of the automobile floor framework can be ensured, the floor panel does not need to be provided with large bulges for improving the rigidity, namely, a large-area flat area is ensured by the floor panel, the use space and the arrangement space of users in the automobile are improved, and the comfort of passengers is further improved.
Optionally, the connection of the left connecting beam and the first cross beam and the connection of the left channel beam and the first cross beam are aligned; the junction of the right connecting beam and the first cross beam and the junction of the right channel beam and the first cross beam are aligned.
Optionally, the lower frame further comprises a left rocker beam and a right rocker beam; and side beams are respectively connected between the left threshold beam and the left longitudinal beam and between the right threshold beam and the right longitudinal beam.
Optionally, the edge beam comprises a second edge beam located at both ends of the second cross beam.
Optionally, the upper frame includes an upper edge beam, the lower frame includes a lower edge beam corresponding to the upper edge beam, and the upper edge beam and the lower edge beam are fixed to the upper and lower sides of the floor panel relatively and form the second edge beam.
Optionally, at least one third cross beam is further connected between the left longitudinal beam and the right longitudinal beam, and the third cross beam is located on the rear side of the second cross beam.
Optionally, when a side beam is provided, the side beam further includes a first side beam and a third side beam, the first side beam is located at two ends of the first cross beam, and the third side beam is located at two ends of the third cross beam.
Optionally, the rear end of the central channel head is connected to the first cross member.
Optionally, the end portions of the first cross beam and the second cross beam are of a divergent structure towards one side of the left longitudinal beam or the right longitudinal beam.
Optionally, the door further comprises a lower sliding rail of the electric side sliding door, the lower frame comprises a metal plate for bearing the lower sliding rail, and the lower sliding rail is integrally formed on a molded surface of the metal plate.
Optionally, the left channel beam and the right channel beam are provided with a seat beam, respectively.
In addition, the invention also provides an automobile which comprises the floor framework.
The technical effect obtained by the vehicle with the floor structure is similar to the floor structure, and is not described herein again for saving space.
Drawings
Fig. 1 is a schematic structural diagram of a floor structure of an automobile according to an embodiment of the present invention;
FIG. 2 is a bottom view of the floor frame without a floor panel;
FIG. 3 is a schematic view of a portion of the force transfer path of FIG. 2;
FIG. 4 is a schematic diagram of a 40% offset crash force transmission path;
FIG. 5 is a schematic view of a full width frontal crash force transmission path.
In the accompanying fig. 1-5, the reference numerals are illustrated as follows:
100-an upper frame; 200-a floor panel; 300-a lower frame;
1-a central channel end; 2-left channel beam; 3-a right channel beam; 4-left stringer; 5-a right stringer; 6-a first beam; 7-a second beam; 8-a left connecting beam; 9-right connecting beam; 10-left threshold beam; 11-right sill beam; 12-a first edge beam; 13-a second edge beam; 14-third edge beam, 15-fourth edge beam; 16-a third beam; 17-sheet metal; 18-seat beam.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1-3, fig. 1 is a schematic structural diagram of a floor structure of an automobile according to an embodiment of the present invention; FIG. 2 is a bottom view of the floor frame without a floor panel; fig. 3 is a schematic view of a portion of the force transfer path of fig. 2.
The embodiment of the invention provides an automobile and a floor framework thereof, wherein as shown in fig. 1 and 2, the floor framework comprises an upper frame 100, a floor panel 200 and a lower frame 300 which are fixedly arranged in sequence, the three parts are mutually fixed, the upper frame 100 comprises a central channel end 1, a left channel beam 2 and a right channel beam 3; the lower frame 300 comprises a left longitudinal beam 4, a right longitudinal beam 5, a first cross beam 6, a second cross beam 7, a left connecting beam 8 and a right connecting beam 9, wherein the left connecting beam 8 is connected between the left longitudinal beam 4 and the first cross beam 6, the right connecting beam 9 is connected between the right longitudinal beam 5 and the first cross beam 6, and the left connecting beam 8 and the right connecting beam 9 are both positioned on the front side of the first cross beam 6; the left and right channel beams 2, 3 are connected between a first and a second cross beam 6, 7, respectively.
Wherein, the front and back refer to the front and back direction of the automobile body, i.e. the front refers to the side facing the head of the automobile, and the left and right refer to the left and right sides of the automobile body, specifically, in the floor structure, a left longitudinal beam 4 and a left connecting beam 8, a right longitudinal beam 5 and a right connecting beam 9 form a similar herringbone structure, the left and right sides have similar structures, and the left connecting beam 8 is connected between the left longitudinal beam 4 and the first cross beam 6 and is located at the front side of the first cross beam 6, at this time, when the front side of the left longitudinal beam 4 is impacted, a part of the impact force will be transmitted along the axial direction of the left longitudinal beam 4, and another part of the impact force will be dispersed to the left connecting beam 8 and transmitted to the first cross beam 6, similarly, when the front side of the right longitudinal beam 5 is impacted, a part of the impact force will be transmitted along the axial direction of the right longitudinal beam 5, another part of the impact force will be dispersed to the right connecting beam 9 and transmitted to the first cross beam 6, and form similar "mesh" style of calligraphy structure by first crossbeam 6, second crossbeam 7, left longeron 4, right longeron 5, left passageway roof beam 2 and right passageway roof beam 3, first crossbeam 6 and second crossbeam 7 can resist front and back displacement, effectively reduce the anterior invasion volume in the collision, and simultaneously, first crossbeam 6 has stronger vertical direction's bending resistance, can prevent this regional dive in the front collision in-process.
Due to the combined action of the upper frame 100 and the lower frame 300, the rigidity and the mode of the automobile floor framework can be ensured, and the floor panel 200 does not need to be provided with large bulges for improving the rigidity, namely, the floor panel 200 ensures a large-area flat area, the use space and the arrangement space of users in the automobile are improved, and the comfort of passengers is further improved.
In the above embodiment, the joints of the left connecting beam 8 and the first cross beam 6 and the joints of the left channel beam 2 and the first cross beam 6 are aligned, and at this time, as shown in fig. 3, the left "herringbone" structure is formed by the left longitudinal beam 4, the left connecting beam 8 and the left channel beam 2, and the right "herringbone" structure is formed by the right longitudinal beam 5, the right connecting beam 9 and the right channel beam 3. When the front end of the automobile is impacted, in the process that the impact force is transmitted backwards along the left longitudinal beam 4, part of the impact force is dispersed to the left connecting beam 8 and is weakened by the first cross beam 6 and then is directly transmitted backwards along the left channel beam 2 to the second cross beam 7, wherein the left channel beam 2 plays a certain supporting role on the left connecting beam 8 from the rear side, and the shearing effect on the first cross beam 6 due to the left connecting beam 8 and the joint of the left channel beam 2 and the first cross beam 6 can be avoided; similarly, the joint of the right connecting beam 9 and the first cross beam 6 and the joint of the right channel beam 3 and the first cross beam 6 are aligned, so that the shearing effect on the first cross beam 6 caused by the joint of the right connecting beam 9, the right channel beam 3 and the first cross beam 6 can be avoided, and the overall structure performance is improved.
In the above embodiment, the lower frame 300 further includes the left rocker beam 10, the right rocker beam 11, and the side beams provided between the left rocker beam 10 and the left side member 4 and between the right rocker beam 11 and the right side member 5 for resisting the impact force from the left and right sides of the automobile.
The side beams in the above embodiment include the second side beam 13, the second side beams 13 are located at two ends of the second cross beam 7, that is, two second side beams 13 are located on the extension line of the second cross beam 7, and are located at the approximate middle position of the automobile, the left and right side frames are similar, and the stress situation is similar, and here, taking the left side frame as an example for explanation, when the automobile is impacted by the impact force from the left side, the left second side beam 13 transmits the force to the left longitudinal beam 4, and at the same time, the force will continue to be transmitted along the second cross beam 7, at this time, the "mesh" type structure will reduce the intrusion amount to the right.
In the above embodiment, the second side member 13 includes two portions, i.e., the upper side member provided to the upper frame 100 and the lower side member provided to the lower frame 300, and is connected to the left or right tunnel member 2 or 3, which are fixed to the upper and lower sides of the floor panel 200, respectively. Of course, in this embodiment, the structure of the second side rail 13 is not limited, for example, it may be configured to include only the lower side rail disposed on the lower frame 300, or configured to be the upper side rail of the upper frame 100, and the structural strength of the second side rail 13 formed by splicing the upper side rail and the lower side rail can be greatly improved, so as to further improve the capability of the floor frame structure against side collision, and achieve good safety.
In the above embodiment, the third cross beams 16 are further disposed between the left side member 4 and the right side member 5, the number of the third cross beams is not limited, and may be one or two or more, specifically, the third cross beams 16 may be disposed according to the length and strength requirements of the vehicle body of the vehicle, each third cross beam 16 is located at the rear side of the second cross beam 7, and each third cross beam 16 can enhance the overall performance of the floor frame.
In the above embodiment, the side sill further comprises a first side sill 12 and a third side sill 14, wherein the first side sill 12 is located at both ends of the first cross member 6, and the third side sill 14 is located at both ends of the third cross member 16, and the first side sill 12 and the third side sill 14 can further improve the resistance to side impact, and at the same time, can improve the anti-torsion performance of the left and right side edges (between the left side sill 4 and the left rocker 10, and between the right side sill and the right rocker 11) of the floor frame.
Of course, in this embodiment, when the number of the third cross beams 16 is two or more, the third cross beams 14 may be correspondingly disposed at two ends of part of the third cross beams 14, and the third cross beams 16 are not disposed at two ends of part of the third cross beams 16, which may be specifically selected according to the disposition position of the third cross beams 16 and the disposition spaces at the two ends thereof.
In addition, the side beam also comprises a fourth side beam 15 which is positioned at the end parts of the left connecting beam 8 and the right connecting beam 9, so that the torsion resistance and the stability of the whole structure are improved.
The first side member 12, the third side member 14, and the fourth side member 15 may be individually disposed on the upper frame 100 or the lower frame 300, or may be formed by assembling a portion of each of the upper frame 100 and the lower frame 300, and may be selected according to the spatial position, which is not required herein.
In the above embodiment, the center tunnel head 1 serves as a protection against intrusion into the front compartment during a vehicle collision, and the rear end thereof is connected to the first cross member 6, that is, the center tunnel head 1 extends rearward to the first cross member 6, the rear side of the first cross member 6 does not occupy a space due to the protrusion of the center tunnel head 1 extending rearward, and the protrusion of the floor at the middle position of the second row of seats can be eliminated, thereby providing a large space for passengers and improving comfort.
In the above embodiment, the floor frame structure may also be used in an automobile with an electric side sliding door, that is, the floor frame structure is provided with a lower sliding rail of the electric side sliding door to support the sliding door hinge pulley to slide, wherein the lower frame 300 is provided with a metal plate 17 for bearing the lower sliding rail, and the lower sliding rail is integrally formed on the metal plate 17 of the floor frame structure.
In the above embodiment, the end portions of the first cross beam 6, the second cross beam 7 and the third cross beam 16 are in a gradually expanding structure on one side of the left longitudinal beam 4 or the right longitudinal beam 5, wherein the end portion of each cross beam is fixedly connected with the left longitudinal beam 4 or the right longitudinal beam 5, so that the connection area can be increased by the gradually expanding structure, the structural connection is more stable, and meanwhile, the larger the cross section is, the better the bending resistance is, and the torsion resistance of the whole floor framework can be improved.
In the above-described embodiment, the left and right tunnel beams 2 and 3 are provided with the seat beams 18, respectively, and fixing the seat to the left and right tunnel beams 2 and 3 can maintain a good posture of the seat in a collision.
Referring to FIGS. 4-5, FIG. 4 is a schematic diagram of a force path for a 40% offset crash; FIG. 5 is a schematic view of a full width frontal crash force transmission path.
The transverse and longitudinal paths of the floor framework in the embodiment are crossed and communicated, so that higher structural rigidity can be provided, and a good foundation is laid for good operation stability and safety of the whole vehicle. Specifically, the force paths of the chevron and mu-shaped structures in a 40% offset frontal impact and a full width frontal rigid barrier impact are described with reference to the accompanying drawings.
As shown in fig. 4, in a 40% offset frontal collision, the front-rear and vertical forces transmitted from the center tunnel head 1 and the left side member 4, and the front-rear forces (shown as F1, F2, and F1 being about twice as large as F2) are transmitted from the left connecting beam 8, the right connecting beam 9, and the center tunnel head 1 to the first cross member 6, wherein the forces transmitted from the left connecting beam 8 are transmitted to the end and middle portions of the first cross member 6 along paths a and c, respectively, and the arrangement of the "herringbone" structure transmits a part of the forces of the F1 path to the F2 path with a smaller force value. The vertical force is transmitted to the first cross beam 6 through the left connecting beam 8 (shown in figure b) and the central channel end 1 (shown in figure e), the first cross beam 6 provides vertical reaction force support, and the left channel beam 2, the right channel beam 3 and the second cross beam 7 provide bending moment to prevent the first cross beam 6 from sinking.
As shown in fig. 5, in the frontal full-width rigid barrier collision test, the forces in the front-back direction and the vertical direction are transmitted from the left longitudinal beam 4, the right longitudinal beam 5 and the central channel end 1, the forces in the front-back direction are transmitted to the first cross beam 6 by (shown as h, m, i, n and f), and are transmitted to the rear structure in the shape of Chinese character 'mu' from the first cross beam 6, in the structure in the shape of Chinese character 'mu', the forces are transmitted to the second cross beam 7 from the left channel beam 2 and the right channel beam 3, and the first cross beam 6 and the second cross beam 7 resist the front invasion simultaneously; the vertical force is transmitted to the first cross beam 6 (shown as g, k and j) through the left connecting beam 8 and the right connecting beam 9, the structure in the shape like the Chinese character 'mu' plays a good anti-torsion role, in the structure in the shape like the Chinese character 'mu', the first cross beam 6 provides reaction force support in the vertical direction, meanwhile, the left channel beam 2, the right channel beam 3 and the second cross beam 7 provide bending moment to prevent the first cross beam 6 from sinking, and the left longitudinal beam 4 and the right longitudinal beam 5 can also provide support for the first cross beam 6 and the second cross beam 7.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (11)
1. The floor structure of the car, characterized by that, include the upper frame (100), floor panel (200) and underframe (300) fixedly arranged sequentially;
the upper frame (100) comprises a central channel end (1), a left channel beam (2) and a right channel beam (3);
the lower frame (300) comprises a left longitudinal beam (4), a right longitudinal beam (5), a first cross beam (6), a second cross beam (7), a left connecting beam (8) and a right connecting beam (9), the left connecting beam (8) is connected between the left longitudinal beam (4) and the first cross beam (6), the right connecting beam (9) is connected between the right longitudinal beam (5) and the first cross beam (6), and the left connecting beam (8) and the right connecting beam (9) are located on the front side of the first cross beam (6);
the left channel beam (2) and the right channel beam (3) are respectively located between the first cross beam (6) and the second cross beam (7);
the rear end of the central channel end (1) is connected with a first cross beam (6).
2. The floor structure of a motor vehicle according to claim 1, characterized in that the connection of the left connecting beam (8) and the first cross beam (6) and the connection of the left channel beam (2) and the first cross beam (6) are aligned;
the junction of the right connecting beam (9) and the first cross beam (6) and the junction of the right channel beam (3) and the first cross beam (6) are aligned.
3. The floor structure of an automobile according to claim 1, wherein said lower frame (300) further comprises a left rocker beam (10) and a right rocker beam (11);
and side beams are respectively connected between the left threshold beam (10) and the left longitudinal beam (4) and between the right threshold beam (11) and the right longitudinal beam (5).
4. -floor construction of a motor vehicle according to claim 3, characterized in that said edge beam comprises a second edge beam (13) at both ends of said second cross beam (7).
5. The floor structure of an automobile according to claim 4, characterized in that the upper frame (100) includes an upper side sill, and the lower frame (300) includes a lower side sill corresponding to the upper side sill, the upper and lower side sills being fixed to upper and lower sides of the floor panel (200) in opposition and forming the second side sill (13).
6. The floor structure of a motor vehicle according to any of claims 1 to 5, characterized in that at least one third cross member (16) is connected between the left longitudinal member (4) and the right longitudinal member (5), said third cross member (16) being located at the rear side of the second cross member (7).
7. The floor structure of an automobile according to claim 6, characterized in that when provided with a side beam, said side beam further comprises a first side beam (12) and a third side beam (14), said first side beam (12) being located at both ends of said first cross beam (6), said third side beam (14) being located at both ends of said third cross beam (16).
8. The floor structure of an automobile according to any of claims 1-5, characterized in that the ends of the first cross member (6) and the second cross member (7) are of a diverging structure to one side of the left longitudinal member (4) or the right longitudinal member (5).
9. The floor structure of an automobile according to any one of claims 1-5, further comprising a lower rail of a power side sliding door, wherein the lower frame (300) comprises a sheet metal (17) for carrying the lower rail, and the lower rail is integrally formed on a profile of the sheet metal (17).
10. The floor structure of an automobile according to any of claims 1-5, characterized in that the left channel beam (2) and the right channel beam (3) are provided with a seat beam (18), respectively.
11. An automobile, characterized in that it comprises a floor structure according to any of claims 1 to 10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811178399.7A CN111017039B (en) | 2018-10-10 | 2018-10-10 | Automobile and floor frame structure thereof |
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| CN201811178399.7A CN111017039B (en) | 2018-10-10 | 2018-10-10 | Automobile and floor frame structure thereof |
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| CN111017039A CN111017039A (en) | 2020-04-17 |
| CN111017039B true CN111017039B (en) | 2022-03-01 |
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| CN113753128B (en) * | 2020-06-02 | 2025-06-27 | 广州汽车集团股份有限公司 | Lower body frame structure |
| FR3158947A1 (en) * | 2024-02-05 | 2025-08-08 | Stellantis Auto Sas | Reinforced structure of motor vehicle. |
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| CN201784713U (en) * | 2010-08-27 | 2011-04-06 | 比亚迪股份有限公司 | Installation structure of vehicle seat |
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| CN206984131U (en) * | 2017-06-30 | 2018-02-09 | 比亚迪股份有限公司 | Body structure and vehicle |
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| JPH11227633A (en) * | 1998-02-19 | 1999-08-24 | Honda Motor Co Ltd | Car body dashboard upper cross member |
| CN101823509A (en) * | 2010-04-14 | 2010-09-08 | 奇瑞汽车股份有限公司 | Automobile front floor framework |
| CN203958337U (en) * | 2014-07-30 | 2014-11-26 | 安徽江淮汽车股份有限公司 | The car body of new-energy automobile and new-energy automobile |
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