CN111169547B

CN111169547B - Body force transmission structure and automobile

Info

Publication number: CN111169547B
Application number: CN201811243358.1A
Authority: CN
Inventors: 林宝龙; 谭小东; 吴鹏辉; 高杰; 杨峰
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2018-10-24
Filing date: 2018-10-24
Publication date: 2021-06-18
Anticipated expiration: 2038-10-24
Also published as: CN111169547A

Abstract

The invention belongs to the technical field of automobile bodies and relates to a force transmission structure of an automobile body. The force transfer structure of the vehicle body comprises a force transfer structure front section, a force transfer structure middle section and a force transfer structure rear section, wherein the force transfer structure middle section is connected between the force transfer structure front section and the force transfer structure rear section; the power transmission structure comprises a force transmission structure middle section and a force transmission structure middle section, wherein the force transmission structure middle section comprises a left front longitudinal beam rear section, a right front longitudinal beam rear section, a left front floor lower longitudinal beam, a right front floor lower longitudinal beam, a first cross beam, a battery pack left mounting longitudinal beam, a battery pack right mounting longitudinal beam and a second cross beam, the first cross beam is fixedly connected between the front end of the left front longitudinal beam rear section and the front end of the right front longitudinal beam rear section, the front end of the battery pack left mounting longitudinal beam and the front end of the battery pack right mounting longitudinal beam are fixedly connected onto the first cross beam, and the rear end of the left front floor lower longitudinal beam, the rear end of the battery pack left mounting longitudinal beam, the rear end of the battery pack right mounting longitudinal beam and the rear end of the right front. The vehicle body force transmission structure can better disperse collision force.

Description

Automobile body force transmission structure and automobile

Technical Field

The invention belongs to the technical field of automobile bodies, and particularly relates to a force transmission structure of an automobile body and an automobile.

Background

The collision safety performance of the automobile is one of the core technologies of the whole automobile research and development and design. The design of the collision safety deformation structure of the vehicle body platform is the basis for improving the collision safety performance of the whole vehicle. With the popularization of automobiles and the development of technologies, the importance degree of the collision safety of automobiles is higher and higher. In recent years, relevant departments in China continuously supplement and improve some test conditions of the collision safety performance of the whole vehicle in relevant collision laws and regulations (CNCAP) and evaluation specifications, and have higher and higher requirements on the collision safety of the whole vehicle. In the traditional fuel vehicle body platform, a vehicle body collision force transmission structure and design are relatively mature. Along with the increasing environmental problems in the world, public environmental protection awareness is getting stronger, and in fuel oil, dual-mode and pure electric vehicle types, the dual-mode vehicle type integrates the endurance of long-distance fuel oil usage and the zero emission advantage of short-distance pure electric usage, and becomes the choice of more and more consumers; however, the collision safety of the power battery of the new energy automobile is also one of the concerns of many consumers for the new energy automobile. Accordingly, research into dual-mode automotive body crash safety structural platforms has become increasingly urgent.

The dual-mode automobile body platform not only needs to meet collision safety regulations and evaluation specifications, but also needs to take into account the arrangement of a fuel power system assembly mainly comprising an engine and a high-voltage power system assembly mainly comprising a power battery. Therefore, compared with a fuel vehicle with the same specification, the weight of the whole dual-mode vehicle is greatly increased, so that the kinetic energy at the initial collision stage of the dual-mode vehicle is greatly increased under the same test condition, and the dual-mode vehicle body framework is required to bear larger force and absorb more motion energy. The collision safety deformation structure and the design method of the traditional fuel automobile body platform cannot meet the requirement of the collision safety deformation structure of the double-mode automobile body platform.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the technical problem that the existing collision safety deformation structure and design method of the fuel automobile body platform cannot meet the requirement of the collision safety deformation structure of the double-mode automobile body platform, a body force transmission structure and an automobile are provided.

In order to solve the technical problem, on one hand, an embodiment of the invention provides a force transmission structure of a vehicle body, which comprises a force transmission structure front section, a force transmission structure middle section and a force transmission structure rear section, wherein the force transmission structure middle section is connected between the force transmission structure front section and the force transmission structure rear section;

the force transmission structure comprises a force transmission structure middle section, a force transmission structure middle section and a force transmission structure middle section, wherein the force transmission structure middle section comprises a left front longitudinal beam rear section, a right front longitudinal beam rear section, a left front floor lower longitudinal beam, a right front floor lower longitudinal beam, a first cross beam, a battery pack left mounting longitudinal beam, a battery pack right mounting longitudinal beam and a second cross beam, the first cross beam is fixedly connected between the front end of the left front longitudinal beam rear section and the front end of the right front longitudinal beam rear section, the front end of the battery pack left mounting longitudinal beam is fixedly connected to the first cross beam, the front end of the battery pack right mounting longitudinal beam is fixedly connected to the first cross beam, the battery pack left mounting longitudinal beam is located on the left side of the battery pack right mounting longitudinal beam, the front end of the left front floor lower longitudinal beam is fixedly connected to the rear end of the left front longitudinal beam rear section, the front end of the right front floor lower longitudinal beam is fixedly connected to the rear end of the right front longitudinal beam, the rear, The rear end of the battery pack right mounting longitudinal beam and the rear end of the right front floor lower longitudinal beam are fixedly connected to the second cross beam from left to right.

According to the vehicle body force transmission structure provided by the embodiment of the invention, when the front side of a vehicle body is collided, collision force applied to the front section of the force transmission structure is transmitted to the rear sections of the left front longitudinal beam and the right front longitudinal beam. Part of the force of the collision force transmitted to the rear section of the left front longitudinal beam is transmitted to the left front floor lower longitudinal beam and transmitted to the rear section of the force transmission structure and the second cross beam through the left front floor lower longitudinal beam to form a force transmission path; and the other part of the collision force transmitted to the rear section of the left front longitudinal beam is transmitted to the left battery pack mounting longitudinal beam and is transmitted to the second cross beam through the left battery pack mounting longitudinal beam to form a force transmission path. Part of the force of the collision force transmitted to the rear section of the right front longitudinal beam is transmitted to the right front floor lower longitudinal beam and transmitted to the rear section of the force transmission structure and the second cross beam through the right front floor lower longitudinal beam; and the other part of the collision force transmitted to the rear section of the right front longitudinal beam is transmitted to the right battery pack mounting longitudinal beam and transmitted to the second cross beam through the right battery pack mounting longitudinal beam to form a force transmission path. Thereby realize the transition of the power transmission route of colliding forward from the anterior segment of power transmission structure to the back end of power transmission structure, better disperse the impact. In addition, the middle section of the force transmission structure is provided with a battery pack left mounting longitudinal beam and a battery pack left mounting longitudinal beam, so that the rigidity of the middle part of the vehicle body can be enhanced.

Optionally, the middle section of the force transmission structure further comprises a left front longitudinal beam rear section inner connecting plate and a right front longitudinal beam rear section inner connecting plate, the front end of the left front longitudinal beam rear section inner connecting plate is fixedly connected with the left end of the first cross beam and the front end of the left front longitudinal beam rear section, and the rear end of the left front longitudinal beam rear section inner connecting plate is fixedly connected with the front end of the battery pack left mounting longitudinal beam;

the front end of the connecting plate in the rear section of the right front longitudinal beam is fixedly connected with the right end of the first cross beam and the front end of the rear section of the right front longitudinal beam, and the rear end of the connecting plate in the rear section of the right front longitudinal beam is fixedly connected with the front end of the right mounting longitudinal beam of the battery pack.

Optionally, the force transmission structure middle section further comprises a main driving seat front beam, a main driving seat rear beam, an auxiliary driving seat front beam and an auxiliary driving seat rear beam, and the main driving seat front beam, the main driving seat rear beam, the auxiliary driving seat front beam and the auxiliary driving seat rear beam are located between the first beam and the second beam in the front-back direction of the vehicle body;

the main driving seat front cross beam is fixedly connected between the rear section of the left front longitudinal beam and the battery pack left mounting longitudinal beam, the main driving seat rear cross beam is fixedly connected between the left front floor lower longitudinal beam and the battery pack left mounting longitudinal beam, and the main driving seat front cross beam is positioned in front of the main driving seat rear cross beam;

the front cross beam of the auxiliary driving seat is fixedly connected between the rear section of the right front longitudinal beam and the right mounting longitudinal beam of the battery pack, the rear cross beam of the auxiliary driving seat is fixedly connected between the lower longitudinal beam of the right front floor and the right mounting longitudinal beam of the battery pack, and the front cross beam of the auxiliary driving seat is positioned in front of the rear cross beam of the auxiliary driving seat;

the main driving seat front cross beam and the auxiliary driving seat front cross beam are positioned on the same straight line, and the main driving seat rear cross beam and the auxiliary driving seat rear cross beam are positioned on the same straight line.

Optionally, the middle section of the force transmission structure further comprises a left inner doorsill plate front connecting plate, a left inner doorsill plate rear connecting plate, a right inner doorsill plate front connecting plate, a right inner doorsill plate and a right inner doorsill plate rear connecting plate;

the right end of the front connecting plate of the left threshold inner plate is fixedly connected to the front end of the rear section of the left front longitudinal beam, the left end of the front connecting plate of the left threshold inner plate is fixedly connected with the front end of the left threshold inner plate, the rear end of the left threshold inner plate is fixedly connected with the front end of the rear connecting plate of the left threshold inner plate, the right side of the rear connecting plate of the left threshold inner plate is fixedly connected with the left end of the second cross beam, the left end of the front cross beam of the main driving seat extends to the left side and is fixedly connected to the left threshold inner plate, and the left end of the rear cross beam of the main driving seat extends to the left side and is fixedly connected to the left;

the left end fixed connection of right threshold inner panel front connecting plate is in on the front end of right front longitudinal beam rear end, the right-hand member of right threshold inner panel front connecting plate with the front end fixed connection of right threshold inner panel, the rear end of right threshold inner panel with the front end fixed connection of right threshold inner panel rear connecting plate, the left side of right threshold inner panel rear connecting plate with the right-hand member fixed connection of second crossbeam, the right-hand member of vice seat front beam of driving extends to the right side and fixed connection is in on the right threshold inner panel, the right-hand member of vice seat rear beam of driving extends to the right side and fixed connection is in on the right threshold inner panel.

Optionally, the middle section of the force transmission structure further comprises a left connecting reinforcing plate, a left front floor lower connecting plate, a right connecting reinforcing plate and a right front floor lower connecting plate;

the left connecting reinforcing plate is fixedly connected between the left threshold inner plate and the rear section of the left front longitudinal beam, the left front floor lower connecting plate is fixedly connected between the left threshold inner plate and the left front floor lower longitudinal beam, and the left connecting reinforcing plate is positioned in front of the left front floor lower connecting plate;

the right connecting reinforcing plate is fixedly connected between the right threshold inner plate and the rear section of the right front longitudinal beam, the right front floor lower connecting plate is fixedly connected between the right threshold inner plate and the right front floor lower longitudinal beam, and the right connecting reinforcing plate is located in front of the right front floor lower connecting plate.

Optionally, the force transmission structure anterior segment includes front anti-collision beam, left front longeron anterior segment and right front longeron anterior segment, front anti-collision beam fixed connection be in between the front end of left front longeron anterior segment and the front end of right front longeron anterior segment, the rear end of left front longeron anterior segment with the front end fixed connection of left front longeron rear section, the rear end of right front longeron anterior segment with the front end fixed connection of right front longeron rear section.

Optionally, the vehicle body force transmission structure further comprises a front subframe, a front subframe left front mounting bracket and a front subframe right front mounting bracket;

the left front mounting bracket of the front auxiliary frame is fixedly connected to the front section of the left front longitudinal beam, and the right front mounting bracket of the front auxiliary frame is fixedly connected to the front section of the right front longitudinal beam;

the front end left side fixed connection of preceding sub vehicle frame is in on the left front mounting bracket of preceding sub vehicle frame, the front end right side fixed connection of preceding sub vehicle frame is in on the right front mounting bracket of preceding sub vehicle frame, the rear end left side fixed connection of preceding sub vehicle frame is in on the connecting plate of left front longitudinal back end, the rear end right side fixed connection of preceding sub vehicle frame is in on the connecting plate of right front longitudinal back end.

Optionally, the force transmission structure rear section includes a left rear longitudinal beam, a right rear longitudinal beam and a rear anti-collision beam, the front end of the left rear longitudinal beam is fixedly connected to the left end of the second cross beam and the right side of the left inner sill plate rear connecting plate, the front end of the right rear longitudinal beam is fixedly connected to the right end of the second cross beam and the left side of the right inner sill plate rear connecting plate, and the rear anti-collision beam is fixedly connected between the rear end of the left rear longitudinal beam and the rear end of the right rear longitudinal beam.

Optionally, the force transmission structure rear section further includes a plurality of rear cross members, and the plurality of rear cross members are fixedly connected between the left rear longitudinal beam and the right rear longitudinal beam in parallel.

Optionally, the vehicle body force transmission structure further comprises a T-shaped battery tray for placing a battery pack, the battery tray comprises a transverse portion and a longitudinal portion located in front of the transverse portion, the left side of the longitudinal portion is fixedly connected to the left mounting longitudinal beam of the battery pack, and the right side of the longitudinal portion is fixedly connected to the right mounting longitudinal beam of the battery pack;

the front end of the left rear longitudinal beam is provided with a battery pack left mounting bracket, and the left end of the transverse part is fixedly connected to the battery pack left mounting bracket;

the front end of the right rear longitudinal beam is provided with a right battery pack mounting bracket, and the right end of the transverse part is fixedly connected to the right battery pack mounting bracket.

On the other hand, the embodiment of the invention also provides an automobile which comprises the automobile body force transmission structure.

Drawings

FIG. 1 is a schematic view (bottom view) of a force transfer structure for a vehicle body provided by an embodiment of the present invention;

FIG. 2 is a schematic view of the assembly of the force transfer structure of the vehicle body with the front subframe and the battery pack according to one embodiment of the present invention;

FIG. 3 is a force transfer schematic of a force transfer structure front section of a force transfer structure of a vehicle body according to an embodiment of the invention;

FIG. 4 is a first force transfer schematic view of a force transfer structure mid-section of a force transfer structure of a vehicle body force transfer structure provided in accordance with an embodiment of the present invention;

FIG. 5 is a second force transfer schematic of a middle section of the force transfer structure of the vehicle body provided by one embodiment of the invention;

FIG. 6 is a force transfer schematic of a rear section of a force transfer structure of a vehicle body provided by an embodiment of the invention;

fig. 7 is a schematic diagram of a battery pack protection frame according to an embodiment of the present invention;

fig. 8 is a schematic connection diagram of the rear section inner connection plate of the right front longitudinal beam of the battery pack protection frame and the right mounting longitudinal beam of the battery pack according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view taken at A-A in FIG. 8;

FIG. 10 is an enlarged view at A in FIG. 9;

fig. 11 is a schematic connection diagram of a first cross member of a battery pack protection frame and a right front side member rear section inner connection plate and a left front side member rear section inner connection plate according to an embodiment of the present invention;

fig. 12 is a schematic connection view of the first cross member of the battery pack protecting frame and the right front side member rear section inner connecting plate and the left front side member rear section inner connecting plate from another view angle according to the embodiment of the present invention;

FIG. 13 is a cross-sectional view taken at B-B of FIG. 12;

FIG. 14 is an enlarged view at B in FIG. 13;

FIG. 15 is a schematic bottom view of the assembly between the middle section of the force transfer structure and the battery pack of the force transfer structure of the vehicle body according to one embodiment of the present invention;

fig. 16 is an assembly schematic (top view) from another perspective between the middle section of the force transfer structure and the battery pack of the force transfer structure of the vehicle body provided by an embodiment of the invention;

fig. 17 is a schematic view of a side impact protection frame for a battery pack according to an embodiment of the present invention (on the left side of the vehicle body);

FIG. 18 is a schematic view of a battery pack side impact protection frame from another perspective (on the left side of the vehicle body) according to one embodiment of the present invention;

fig. 19 is a schematic assembly view (bottom view) of a battery pack side impact protection frame and a battery pack according to an embodiment of the present invention;

fig. 20 is a schematic assembly view (top view) of a battery pack side impact protection frame and a battery pack according to an embodiment of the present invention;

FIG. 21 is a cross-sectional view taken at C-C of FIG. 20;

fig. 22 is an enlarged view at C in fig. 21.

The reference numerals in the specification are as follows:

100. a force transfer structure front section; 200. a force transfer structure middle section; 300. a rear section of the force transfer structure; 400. a front subframe; 500. a front sub-frame left front mounting bracket; 600. a front auxiliary frame right front mounting bracket; 700. a battery tray; 7001. a transverse portion; 7002. a longitudinal portion; 7003. a tray left leg; 7004. a tray right leg;

1. a left front longitudinal beam rear section; 2. a right front longitudinal beam rear section; 3. a left front floor lower longitudinal beam; 4. a right front floor lower longitudinal beam; 5. a first cross member; 501. a fifth left connecting plate; 5011. a first lower web portion; 5012. a first side connecting plate portion; 502. a fifth right connecting plate; 5021. a second lower web portion; 5022. a second side connecting plate portion; 6. a longitudinal beam is arranged on the left side of the battery pack; 601. a first protrusion; 602. a second left connecting plate; 603. a second right connecting plate; 7. a longitudinal beam is arranged on the right side of the battery pack; 701. a second protrusion; 702. a fourth left connecting plate; 703. a fourth right connecting plate; 8. a second cross member; 9. a left front longitudinal beam rear section inner connecting plate; 901. a lower surface; 902. a right side wall; 904. a left connection end; 10. a connecting plate in the rear section of the right front longitudinal beam; 1001. a second groove; 1002. a third left connecting plate; 1003. a third right connecting plate; 1004. a right connection end; 1005. a lower surface; 1006. a right side wall; 11. a main driving seat front beam; 1101. a first extension plate; 1102. a second extension plate; 1103. the first side is flanged; 1104. first back flanging; 1105. third front flanging; 12. a main driving seat rear cross beam; 1201. a first lower flanging; 1202. a second side flanging; 1203. a first front flange; 1204. thirdly, flanging; 13. a front beam of the assistant driver seat; 14. a rear cross beam of the assistant driver seat; 15. a front connecting plate of the left doorsill inner plate; 16. a left sill inner panel; 17. a rear connecting plate of the left doorsill inner plate; 18. a front connecting plate of the inner plate of the right doorsill; 19. a right sill inner panel; 20. a right doorsill inner plate rear connecting plate; 21. a left connection reinforcing plate; 22. a left front floor lower connecting plate; 23. a right connection reinforcing plate; 24. a right front underfloor connection plate; 25. a front impact beam; 26. a front section of the left front longitudinal beam; 27. a front section of the right front longitudinal beam; 28. a left rear stringer; 2801. a battery pack left mounting bracket; 2802. a left rear stringer front section; 2803. a left rear longitudinal beam rear section; 29. a right rear stringer; 2901. a battery pack right mounting bracket; 2902. a front section of a right rear longitudinal beam; 2903. a right rear longitudinal beam rear section; 30. a rear impact beam; 31. a first rear cross member; 32. a second rear cross member; 33. a third rear cross member; 34. a fourth rear cross member; 35. the battery pack left protective longitudinal beam; 3501. flanging the left protective longitudinal beam; 36. the battery pack right protection longitudinal beam; 37. a second nut.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present 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 merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 22, a force transmission structure of a vehicle body provided in an embodiment of the present invention includes a force transmission structure front section 100, a force transmission structure middle section 200, and a force transmission structure rear section 300, where the force transmission structure middle section 200 is connected between the force transmission structure front section 100 and the force transmission structure rear section 300.

The force transmission structure middle section 200 comprises a left front longitudinal beam rear section 1, a right front longitudinal beam rear section 2, a left front floor longitudinal beam 3, a right front floor longitudinal beam 4, a first cross beam 5, a battery pack left mounting longitudinal beam 6, a battery pack right mounting longitudinal beam 7 and a second cross beam 8, wherein the first cross beam 5 is fixedly connected between the front end of the left front longitudinal beam rear section 1 and the front end of the right front longitudinal beam rear section 2, the front end of the battery pack left mounting longitudinal beam 6 is fixedly connected to the first cross beam 5, the front end of the battery pack right mounting longitudinal beam 7 is fixedly connected to the first cross beam 5, the battery pack left mounting longitudinal beam 6 is positioned on the left side of the battery pack right mounting longitudinal beam 7, the front end of the left front floor longitudinal beam 3 is fixedly connected with the rear end of the left front longitudinal beam rear section 1, the front end of the right front floor longitudinal beam 4 is fixedly connected with the rear end of the right front longitudinal beam rear section 2, the rear end of the left front floor lower longitudinal beam 3, the rear end of the battery pack left mounting longitudinal beam 6, the rear end of the battery pack right mounting longitudinal beam 7 and the rear end of the right front floor lower longitudinal beam 4 are fixedly connected to the second cross beam 8 from left to right.

According to the force transmission structure of the vehicle body provided by the embodiment of the invention, when the front side of the vehicle body is collided, collision force applied to the front section 100 of the force transmission structure is transmitted to the rear section 1 of the left front longitudinal beam and the rear section 2 of the right front longitudinal beam. Part of the force of the collision force transmitted to the rear section 1 of the left front longitudinal beam is transmitted to the left front floor lower longitudinal beam 3 and is transmitted to the rear section 300 of the force transmission structure and the second cross beam 8 through the left front floor lower longitudinal beam 3 to form a force transmission path h; the other part of the collision force transmitted to the left front longitudinal beam rear section 1 is transmitted to the battery pack left mounting longitudinal beam 6 and transmitted to the second cross beam 8 through the battery pack left mounting longitudinal beam 6, so that a force transmission path i is formed. A part of the collision force transmitted to the right front longitudinal beam rear section 2 is transmitted to the right front floor lower longitudinal beam 4 and transmitted to the force transmission structure rear section 300 and the second cross beam 8 through the right front floor lower longitudinal beam 4 to form a force transmission path k; the other part of the collision force transmitted to the right front longitudinal beam rear section 2 is transmitted to the battery pack right mounting longitudinal beam 7 and transmitted to the second cross beam 8 through the battery pack right mounting longitudinal beam 7, so that a force transmission path l is formed. Therefore, the transition of the front collision force transmission path from the middle section 200 of the force transmission structure to the rear section 300 of the force transmission structure is realized, and the collision force is better dispersed. In addition, the middle section 200 of the force transmission structure is provided with a battery pack left mounting longitudinal beam 6 and a battery pack right mounting longitudinal beam 7, so that the rigidity of the middle part of the vehicle body can be enhanced.

The second cross beam 8 is located at the connecting position of the force transmission structure middle section 200 and the force transmission structure rear section 300, the front end of the second cross beam 8 is welded with the rear end of the left front floor lower longitudinal beam 3, the rear end of the battery pack left installation longitudinal beam 6, the rear end of the battery pack right installation longitudinal beam 7 and the rear end of the right front floor lower longitudinal beam 4 from left to right, all the longitudinal beams and all the cross beam assemblies of the force transmission structure middle section 200 are connected into a whole, and the rear section of the second cross beam 8 is connected with the force transmission structure rear section 300, so that the force transmission structure middle section 200 and the force transmission structure rear section 300 are connected.

In an embodiment, as shown in fig. 1 and 4, the force transmission structure middle section 200 further includes a left front longitudinal beam rear section inner connection plate 9 and a right front longitudinal beam rear section inner connection plate 10, a front end of the left front longitudinal beam rear section inner connection plate 9 is fixedly connected to a left end of the first cross beam 5 and a front end of the left front longitudinal beam rear section 1, and a rear end of the left front longitudinal beam rear section inner connection plate 9 is fixedly connected to a front end of the battery pack left mounting longitudinal beam 6.

Left front longitudinal back end inner connecting plate 9 welds in the right side of left front longitudinal back end 1 to weld in the front end of the left installation longeron of battery package 6 and the left side of first crossbeam 5, play the effect of connecting the front end of left front longitudinal back end 1 and the left installation longeron of battery package 6 and first crossbeam 5. The collision force from the left front longitudinal beam rear section 1 and the front sub-frame 400 is transmitted to the battery pack left mounting longitudinal beam 6 through the left front longitudinal beam rear section inner connecting plate 9, and is transmitted to the second cross beam 8 through the battery pack left mounting longitudinal beam 6, so that a force transmission path is formed.

As shown in fig. 1 and 4, the front end of the right front side member rear-section inner connection plate 10 is fixedly connected to the right end of the first cross member 5 and the front end of the right front side member rear section 2, and the rear end of the right front side member rear-section inner connection plate 10 is fixedly connected to the front end of the battery pack right mounting side member 7.

The right front longitudinal beam rear section inner connecting plate 10 is welded on the left side of the right front longitudinal beam rear section 2, welded on the front end of the battery pack right mounting longitudinal beam 7 and the right side of the first cross beam 5, and plays a role in connecting the front end of the right front longitudinal beam rear section 2 and the battery pack right mounting longitudinal beam 7 and the first cross beam 5. The collision force from the right front side member rear section 2 and the front sub-frame 400 is transmitted to the battery pack right mounting side member 7 through the right front side member rear section inner connection plate 10, and is transmitted to the second cross member 8 through the battery pack right mounting side member 7, forming a force transmission path.

In one embodiment, as shown in fig. 7 and 8, a first connecting portion is disposed at the rear end of the left front side member rear section inner connecting plate 9, a second connecting portion is disposed at the front end of the battery pack left mounting side member 6, and the second connecting portion is fixedly connected above the first connecting portion, so as to fixedly connect the rear end of the left front side member rear section inner connecting plate 9 and the front end of the battery pack left mounting side member 6.

The rear end of the connecting plate 10 in the rear section of the right front longitudinal beam is provided with a third connecting part, the front end of the battery pack right installation longitudinal beam 7 is provided with a fourth connecting part, and the fourth connecting part is fixedly connected above the third connecting part so as to connect the rear end of the connecting plate 10 in the rear section of the right front longitudinal beam with the front end of the battery pack right installation longitudinal beam 7.

In an embodiment, as shown in fig. 9 and 10, a second groove 1001 extending longitudinally along the front-rear direction of the vehicle body and having an upward opening is provided on the third connecting portion, a second protrusion 701 extending longitudinally along the front-rear direction of the vehicle body and protruding downward is provided on the fourth connecting portion, and the second protrusion 701 is fixedly connected in the second groove 1001 to fixedly connect the fourth connecting portion above the third connecting portion.

The connection mode between the first connection part and the second connection part is the same as the connection mode between the third connection part and the fourth connection part. Specifically, be provided with on the first connecting portion and extend longitudinal extension and the ascending first recess of opening along the fore-and-aft direction of automobile body, be provided with on the second connecting portion and extend and the first arch 601 (refer to fig. 17) of downward convex along the fore-and-aft direction of automobile body, first arch 601 fixed connection be in the first recess, in order to incite somebody to action second connecting portion fixed connection be in the top of first connecting portion.

In an embodiment, as shown in fig. 10, the lower surface of the second protrusion 701 is attached to the bottom surface of the second groove 1001.

Further, the lower surface of the first protrusion 601 is attached to and fixed to the bottom surface of the first groove.

In an embodiment, as shown in fig. 10, the left side edge of the second groove 1001 is turned over to the left to form a third left connecting plate 1002, the right side edge of the second groove 1001 is turned over to the right to form a third right connecting plate 1003, the left side upper edge of the second protrusion 701 extends to the left to form a fourth left connecting plate 702, the right side upper edge of the second protrusion 701 extends to the right to form a fourth right connecting plate 703, the fourth left connecting plate 702 is attached and fixed to the third left connecting plate 1002, and the fourth right connecting plate 703 is attached and fixed to the third right connecting plate 1003, so that the connection between the right front longitudinal beam rear section inner connecting plate 10 and the battery pack right mounting longitudinal beam 7 is more stable.

Further, the left side border of first recess is rolled over left and is formed first left connection, the right side border of first recess is rolled over right and is formed first right connecting plate, refer to fig. 17, the left side upper limb of first arch 601 extends left and forms second left connecting plate 602, the right side upper limb of first arch 601 extends right and forms second right connecting plate 603, the laminating of second left connecting plate 602 is fixed on the first left connecting plate, the laminating of second right connecting plate 603 is fixed on the first right connecting plate, so that left front longitudinal beam back end inner connecting plate 9 with the connection between the battery package left side longeron installation longeron 6 is more stable.

In an embodiment, as shown in fig. 11 and 12, a fifth left connecting plate 501 is disposed at a left end of the first cross beam 5, a fifth right connecting plate 502 is disposed at a right end of the first cross beam 5, the fifth left connecting plate 501 is fixedly connected to a front end of the left front longitudinal beam rear section inner connecting plate 9, and the fifth right connecting plate 502 is fixedly connected to a front end of the right front longitudinal beam rear section inner connecting plate 10, so as to fixedly connect the first cross beam 5 to the left front longitudinal beam rear section inner connecting plate 9 and the right front longitudinal beam rear section inner connecting plate 10.

In one embodiment, as shown in fig. 11 to 14, the fifth left connecting plate 501 includes a first lower connecting plate portion 5011 and a first side connecting plate portion 5012, the first lower connecting plate portion 5011 is fixedly connected to a lower surface 901 of the front end of the left front side frame rear inner connecting plate 9, and the first side connecting plate portion 5012 is fixedly connected to a right side wall 902 of the front end of the left front side frame rear inner connecting plate 9, so as to fixedly connect the fifth left connecting plate 501 and the front end of the left front side frame rear inner connecting plate 9.

In an embodiment, as shown in fig. 11 and 12, the fifth right connecting plate 502 includes a second lower connecting plate portion 5021 and a second side connecting plate portion 5022, the second lower connecting plate portion 5021 is fixedly connected to the lower surface 1005 of the front end of the right front longitudinal beam rear section inner connecting plate 10, and the second side connecting plate portion 5022 is fixedly connected to the left side wall 1006 of the front end of the right front longitudinal beam rear section inner connecting plate 10, so as to fixedly connect the fifth right connecting plate 502 and the front end of the right front longitudinal beam rear section inner connecting plate 10.

In one embodiment, as shown in fig. 7, a left connecting end 904 for fixedly connecting with the left front side member rear section 1 of the vehicle body is provided on the left side of the front end of the left front side member rear section inner connecting plate 9, and the left front side member rear section inner connecting plate 9 is fixedly connected to the front end of the left front side member rear section 1 through the left connecting end 904.

The right front-side member rear-section inner connecting plate 10 is provided with a right connecting end 1004 on the right side of the front end thereof for being fixedly connected with the right front-side member rear section 2 of the vehicle body, and the right front-side member rear-section inner connecting plate 10 is fixedly connected to the front end of the right front-side member rear section 2 through the right connecting end 1004.

In an embodiment, as shown in fig. 1, the force transmission structure middle section 200 further includes a main driving seat front beam 11, a main driving seat rear beam 12, an auxiliary driving seat front beam 13, and an auxiliary driving seat rear beam 14, and the main driving seat front beam 11, the main driving seat rear beam 12, the auxiliary driving seat front beam 13, and the auxiliary driving seat rear beam 14 are located between the first beam 5 and the second beam 8 in the front-rear direction of the vehicle body. The main driving seat front cross beam 11 and the auxiliary driving seat front cross beam 13 are positioned on the same straight line, and the main driving seat rear cross beam 12 and the auxiliary driving seat rear cross beam 14 are positioned on the same straight line.

The main driving seat front cross beam 11 is fixedly connected between the left front longitudinal beam rear section 1 and the battery pack left mounting longitudinal beam 6, the main driving seat rear cross beam 12 is fixedly connected between the left front floor lower longitudinal beam 3 and the battery pack left mounting longitudinal beam 6, and the main driving seat front cross beam 11 is located in front of the main driving seat rear cross beam 12.

The main driving seat front cross beam 11 is welded between the left front longitudinal beam rear section 1 and the battery pack left mounting longitudinal beam 6, and the battery pack left mounting longitudinal beam 6 and the left front longitudinal beam rear section 1 are transversely connected, so that the left front longitudinal beam rear section 1 and the battery pack left mounting longitudinal beam 6 are integrated.

As shown in fig. 1, the front secondary driver seat cross beam 13 is fixedly connected between the rear section 2 of the front right longitudinal beam and the right battery pack mounting longitudinal beam 7, the rear secondary driver seat cross beam 14 is fixedly connected between the lower right front floor longitudinal beam 4 and the right battery pack mounting longitudinal beam 7, and the front secondary driver seat cross beam 13 is located in front of the rear secondary driver seat cross beam 14.

The rear cross beam 14 of the secondary driving seat is welded between the right front floor lower longitudinal beam 4 and the battery pack right mounting longitudinal beam 7, and the battery pack right mounting longitudinal beam 7 and the right front floor lower longitudinal beam 4 are transversely connected, so that the right front floor lower longitudinal beam 4 and the battery pack right mounting longitudinal beam 7 are integrated.

In an embodiment, as shown in fig. 15 to 22, the vehicle body force transmission structure further includes a battery pack left protective longitudinal beam 35 and a battery pack right protective longitudinal beam 36, the battery pack left protective longitudinal beam 35 is located on the left side of the battery pack right protective longitudinal beam 36, the right end of the main driving seat front cross beam 11 is fixedly connected with the front end of the battery pack left protective longitudinal beam 35, the right end of the main driving seat rear cross beam 12 is fixedly connected with the rear end of the battery pack left protective longitudinal beam 35, and the main driving seat front cross beam 11 is located in front of the main driving seat rear cross beam 12.

The left end of the front beam 13 of the secondary driver seat is fixedly connected with the front end of the right protection longitudinal beam 36 of the battery pack, the left end of the rear beam 14 of the secondary driver seat is fixedly connected with the rear end of the right protection longitudinal beam 36 of the battery pack, and the front beam 13 of the secondary driver seat is positioned in front of the rear beam 14 of the secondary driver seat.

Through increase battery package left side protection longeron 35 and battery package right side protection longeron 36 in the both sides of battery package (power battery) on original two crossbeam basis, form the battery package side of "C" type and bump the protective frame, protect the battery package on the basis of effectively decomposing side load to with battery package mounting point design about the crossbeam line, can effectively transmit and decompose the side and bump the load and protect the battery package, satisfy the power security demand.

In one embodiment, as shown in fig. 15 and 16, the left battery pack mounting longitudinal beam 6 is fixedly connected below the left battery pack protecting longitudinal beam 35, and the right battery pack mounting longitudinal beam 7 is fixedly connected below the right battery pack protecting longitudinal beam 36, so that the left battery pack protecting longitudinal beam 35 and the left battery pack mounting longitudinal beam 6 are fixedly connected, and the right battery pack protecting longitudinal beam 36 and the right battery pack mounting longitudinal beam 7 are fixedly connected.

In one embodiment, as shown in fig. 15 and 16, the left and right battery pack

protection side members

35 and 36 extend in the front-rear direction of the vehicle body to simultaneously protect the battery tray 700 from the left and right sides.

In an embodiment, as shown in fig. 17 and 18, a top wall of the front cross member 11 of the main driver's seat extends rightward to form a first extension plate 1101, and the first extension plate 1101 is fixedly connected to a top wall of the left protective longitudinal beam 35 of the battery pack.

The front side wall of the front cross beam 11 of the main driving seat extends rightward to form a second extension plate 1102, and the second extension plate 1102 is fixedly connected to the front side wall of the left protective longitudinal beam 35 of the battery pack.

The right side edge of the rear side wall of the front main seat beam 11 is turned backwards to form a first side flange 1103, and the first side flange 1103 is fixedly connected to the left side wall of the battery pack left protective longitudinal beam 35.

The lower side edge of the rear side wall of the front beam 11 of the main driving seat is turned backwards to form a first rear turned edge 1104, the lower side edge of the left side wall of the battery pack left protective longitudinal beam 35 is turned leftwards to form a left protective longitudinal beam turned edge 3501, and the right end of the first rear turned edge 1104 is fixedly connected to the left protective longitudinal beam turned edge 3501.

The main driving seat front beam 11 is provided with extension plates (a first extension plate 1101 and a second extension plate 1102) and flanges (a first side flange 1103 and a first rear flange 1104), and the extension plates and the flanges are fixedly connected to the battery pack left protection longitudinal beam 35, so that the main driving seat front beam 11 and the battery pack left protection longitudinal beam 35 are fixedly connected.

In an embodiment, as shown in fig. 17 and 18, a right side edge of a top wall of the main seat rear cross beam 12 is turned downward to form a first downward flange 1201, a right side edge of a front side wall of the main seat rear cross beam 12 is turned forward to form a second downward flange 1202, and the first downward flange 1201 and the second downward flange 1202 are fixedly connected to a left side wall of the battery pack left protection longitudinal beam 35.

The lower side edge of the front side wall of the main seat rear cross beam 12 is folded forward to form a first front flanging 1203, and the right end of the first front flanging 1203 is fixedly connected to the left protective longitudinal beam flanging 3501.

The main driving seat rear cross beam 12 is provided with flanges (a first lower flange 1201, a second side flange 1202 and a first front flange 1203), and the flanges are fixedly connected to the battery pack left protection longitudinal beam 35, so that the main driving seat rear cross beam 12 is fixedly connected to the battery pack left protection longitudinal beam 35.

In one embodiment, the front cross member 13 of the secondary cab seat and the right protective longitudinal beam 36 of the battery pack are fixed in the same way as the front cross member 11 of the primary cab seat and the left protective longitudinal beam 35 of the battery pack. The top wall of the front beam 13 of the front passenger seat extends leftwards to form a third extending plate, and the third extending plate is fixedly connected to the top wall of the battery pack right protective longitudinal beam 36.

The front side wall of the front beam 13 of the secondary driver seat extends leftwards to form a fourth extending plate, and the fourth extending plate is fixedly connected to the front side wall of the battery pack right protective longitudinal beam 36.

The left side edge of the rear side wall of the front beam 13 of the secondary driver seat is turned backwards to form a third side flanging, and the third side flanging is fixedly connected to the right side wall of the battery pack right protective longitudinal beam 36.

The lower side edge of the rear side wall of the front beam 13 of the secondary driving seat is turned backwards to form a second rear turned edge, the lower side edge of the right side wall of the battery pack right protective longitudinal beam 36 is turned rightwards to form a right protective longitudinal beam turned edge, and the left end of the second rear turned edge is fixedly connected to the right protective longitudinal beam turned edge.

The front beam 13 of the auxiliary driving seat is provided with extension plates (a third extension plate and a fourth extension plate) and flanges (a third side flange and a second rear flange), and the extension plates and the flanges are fixedly connected to the battery pack right protective longitudinal beam 36, so that the front beam 13 of the auxiliary driving seat is fixedly connected with the battery pack right protective longitudinal beam 36.

In one embodiment, the rear cross member 14 of the front passenger seat and the right side protective longitudinal beam 36 of the battery pack are fixed in the same way as the rear cross member 12 of the main passenger seat and the left side protective longitudinal beam 35 of the battery pack. The left edge of the top wall of the secondary seat rear cross beam 14 is turned downwards to form a second downward turned edge, the left edge of the front side wall of the secondary seat rear cross beam 14 is turned forwards to form a fourth turned edge, and the second downward turned edge and the fourth turned edge are fixedly connected to the right side wall of the battery pack right protection longitudinal beam 36.

The lower side edge of the front side wall of the rear cross beam 14 of the secondary driver seat is turned forwards to form a second front turned edge, and the left end of the second front turned edge is fixedly connected to the turned edge of the right protective longitudinal beam.

The fixed connection between the secondary seat rear cross beam 14 and the battery pack right protective longitudinal beam 36 is realized by arranging the flanges (the second lower flange, the fourth side flange and the second front flange) on the secondary seat rear cross beam 14 and fixedly connecting the flanges to the battery pack right protective longitudinal beam 36.

In an embodiment, as shown in fig. 17 and 18, a lower side edge of a front side wall of the main front cross member 11 is folded forward to form a third front flange 1105, and a right end of the third front flange 1105 is fixedly connected to the second left connecting plate 602, so as to realize the fixed connection between the main front cross member 11 and the battery pack left mounting longitudinal beam 6.

The lower side edge of the rear side wall of the main driving seat rear cross beam 12 is turned backwards to form a third rear turned edge 1204, and the right end of the third rear turned edge 1204 is fixedly connected to the second left connecting plate 602, so that the main driving seat rear cross beam 12 is fixedly connected with the battery pack left mounting longitudinal beam 6.

In an embodiment, the lower side edge of the front side wall of the front beam 13 of the assistant seat is turned forward to form a fourth front flange, and the left end of the fourth front flange is fixedly connected to the fourth right connecting plate 703, so as to realize the fixed connection between the front beam 13 of the assistant seat and the right battery pack mounting longitudinal beam 7.

The lower side edge of the rear side wall of the rear cross beam 14 of the secondary driver seat is turned backwards to form a fourth rear turned edge, and the left end of the fourth rear turned edge is fixedly connected to the fourth right connecting plate 703, so that the rear cross beam 14 of the secondary driver seat is fixedly connected with the right battery pack mounting longitudinal beam 7.

In an embodiment, as shown in fig. 1, the force transmission structure middle section 200 further includes a left inner sill plate front connecting plate 15, a left inner sill plate 16, a left inner sill plate rear connecting plate 17, a right inner sill plate front connecting plate 18, a right inner sill plate 19, and a right inner sill plate rear connecting plate 20.

The left side threshold inner panel front connecting plate 15 right-hand member fixed connection in on the front end of left front longitudinal 1, the left end of left side threshold inner panel front connecting plate 15 with the front end fixed connection of left side threshold inner panel 16, the rear end of left side threshold inner panel 16 with the front end fixed connection of left side threshold inner panel rear connecting plate 17, the right side of left side threshold inner panel rear connecting plate 17 with the left end fixed connection of second crossbeam 8, the left end that mainly drives seat front beam 11 extends and fixed connection in to the left side on left side threshold inner panel 16, the left end that mainly drives seat rear beam 12 extends and fixed connection in to the left side on left side threshold inner panel 16.

The front cross beam 11 of the main driving seat is welded on the right side of the left threshold inner plate 16 and welded on the rear section 1 of the left front longitudinal beam at the middle section, and the right end is welded on the left installation longitudinal beam 6 of the battery pack, so that the left threshold inner plate 16, the rear section 1 of the left front longitudinal beam and the left installation longitudinal beam 6 of the battery pack are transversely connected, and the left threshold inner plate 16, the rear section 1 of the left front longitudinal beam and the left installation longitudinal beam 6 of the battery pack are integrated.

The left inner sill plate front connecting plate 15 is welded on the left side of the left front longitudinal beam rear section 1 and is welded on the front section of the left inner sill plate 16, and the left inner sill plate front connecting plate plays a role in connecting the left front longitudinal beam rear section 1 and the left inner sill plate 16. The left sill inner panel rear connecting plate 17 is welded to the rear end of the left sill inner panel 16, and the right side of the left sill inner panel rear connecting plate is connected to the front end of the left rear longitudinal beam 28 and the second cross beam 8, so that the left sill inner panel 16, the left rear longitudinal beam 28 and the second cross beam 8 are reinforced.

As shown in fig. 1, the left end of the right inner sill plate front connecting plate 18 is fixedly connected to the front end of the right front longitudinal beam rear section 2, the right end of the right inner sill plate front connecting plate 18 is fixedly connected to the front end of the right inner sill plate 19, the rear end of the right inner sill plate 19 is fixedly connected to the front end of the right inner sill plate rear connecting plate 20, the left side of the right inner sill plate rear connecting plate 20 is fixedly connected to the right end of the second cross beam 8, the right end of the front assistant driver seat cross beam 13 extends to the right side and is fixedly connected to the right inner sill plate 19, and the right end of the rear assistant driver seat cross beam 14 extends to the right side and is fixedly connected to the right inner sill plate 19.

The front cross beam 13 of the front passenger seat is welded on the left side of the right threshold inner plate 19 and welded on the rear section 2 of the right front longitudinal beam at the middle section, the left end is welded on the right mounting longitudinal beam 7 of the battery pack, and the right threshold inner plate 19, the rear section 2 of the right front longitudinal beam and the right mounting longitudinal beam 7 of the battery pack are transversely connected, so that the right threshold inner plate 19, the rear section 2 of the right front longitudinal beam and the right mounting longitudinal beam 7 of the battery pack are integrated.

The right threshold inner plate front connecting plate 18 is welded on the left side of the right front longitudinal beam rear section 2 and is welded on the front section of the right threshold inner plate 19, and the right threshold inner plate front connecting plate plays a role in connecting the right front longitudinal beam rear section 2 and the right threshold inner plate 19. The right sill inner panel rear connecting plate 20 is welded to the rear end of the right sill inner panel 19, and the left side is connected to the front end of the left rear longitudinal beam 28 and the second cross beam 8, so as to reinforce the right sill inner panel 19, the left rear longitudinal beam 28 and the second cross beam 8.

In one embodiment, as shown in fig. 1, the force transfer structural center section 200 further includes a left connecting reinforcement plate 21, a left front underfloor connection plate 22, a right connecting reinforcement plate 23, and a right front underfloor connection plate 24.

The left connecting reinforcing plate 21 is fixedly connected between the left rocker inner plate 16 and the left front longitudinal beam rear section 1, the left front floor lower connecting plate 22 is fixedly connected between the left rocker inner plate 16 and the left front floor lower longitudinal beam 3, and the left connecting reinforcing plate 21 is positioned in front of the left front floor lower connecting plate 22.

The left connecting reinforcing plate 21 is located below the front cross beam 11 of the main driving seat, is welded to the right side of the left doorsill inner plate 16 leftwards and is welded to the left side of the rear section 1 of the left front longitudinal beam rightwards, and the middle of the left connecting reinforcing plate 21 is welded to the lower end of the front cross beam 11 of the main driving seat so as to be fixedly connected between the left doorsill inner plate 16 and the rear section 1 of the left front longitudinal beam.

The left front floor lower connecting plate 22 is located below the main driving seat rear cross beam 12, is welded to the right side of the left doorsill inner plate 16 leftwards and welded to the left side of the left front floor lower longitudinal beam 3 rightwards, and is welded to the lower end of the main driving seat rear cross beam 12 in the middle, so that the left front floor lower connecting plate 22 is fixedly connected between the left doorsill inner plate 16 and the left front floor lower longitudinal beam 3.

As shown in fig. 1, the right connecting reinforcement plate 23 is fixedly connected between the right rocker inner plate 19 and the right front side member rear section 2, the right front underfloor lower connection plate 24 is fixedly connected between the right rocker inner plate 19 and the right front underfloor lower connection plate 4, and the right connecting reinforcement plate 23 is located in front of the right front underfloor lower connection plate 24.

The right connecting reinforcing plate 23 is located below the front cross beam 13 of the assistant driver seat, is welded to the left side of the right doorsill inner plate 19 towards the right side, is welded to the right side of the rear section 2 of the right front longitudinal beam towards the left side, and is welded to the lower end of the front cross beam 13 of the assistant driver seat in the middle, so that the right connecting reinforcing plate 23 is fixedly connected between the right doorsill inner plate 19 and the rear section 2 of the right front longitudinal beam.

The right front floor lower connecting plate 24 is located below the rear cross beam 14 of the secondary driving seat, is welded to the left side of the right threshold inner plate 19 towards the right side and is welded to the right side of the right front floor lower longitudinal beam 4 towards the left side, and the middle of the right front floor lower connecting plate is welded to the lower end of the rear cross beam 14 of the secondary driving seat so as to fixedly connect the right front floor lower connecting plate 24 between the right threshold inner plate 19 and the right front floor lower longitudinal beam 4.

In one embodiment, as shown in fig. 1, the force transmission structure front section 100 includes a front impact beam 25, a left front longitudinal beam front section 26, and a right front longitudinal beam front section 27, the front impact beam 25 is fixedly connected between a front end of the left front longitudinal beam front section 26 and a front end of the right front longitudinal beam front section 27, a rear end of the left front longitudinal beam front section 26 is fixedly connected with a front end of the left front longitudinal beam rear section 1, and a rear end of the right front longitudinal beam front section 27 is fixedly connected with a front end of the right front longitudinal beam rear section 2.

Specifically, the front impact beam 25 is bolted on the left side to the left front side member front section 26 and on the right side to the right front side member front section 27. The left front longitudinal beam front section 26 is welded on the left front longitudinal beam rear section 1, and the right front longitudinal beam front section 27 is welded on the right front longitudinal beam rear section 2.

In one embodiment, as shown in fig. 1 and 2, the force-transmitting structure further includes a front subframe 400, a front subframe left front mounting bracket 500, and a front subframe right front mounting bracket 600.

The front subframe left front mounting bracket 500 is fixedly connected to the left front longitudinal beam front section 26, and the front subframe right front mounting bracket 600 is fixedly connected to the right front longitudinal beam front section 27.

Preceding sub vehicle frame 400's front end left side fixed connection be in on the preceding sub vehicle frame left side front mounting bracket 500, the front end right side fixed connection of preceding sub vehicle frame 400 is in on the preceding sub vehicle frame right front mounting bracket 600, the rear end left side fixed connection of preceding sub vehicle frame 400 is in on the left side front longitudinal back end in-connection plate 9, the rear end right side fixed connection of preceding sub vehicle frame 400 is in on the right front longitudinal back end in-connection plate 10.

Part of the collision force from the front subframe 400 is transmitted to the left mounting longitudinal beam 6 of the battery pack through the left front longitudinal beam rear section inner connecting plate 9, and the other part of the collision force from the front subframe 400 is transmitted to the right mounting longitudinal beam 7 of the battery pack through the right front longitudinal beam rear section inner connecting plate 10, so that part of the collision force is transmitted to the force transmission structure middle section 200 from the force transmission structure front section 100, and the transition of a front collision force transmission path from the force transmission structure front section 100 to the force transmission structure middle section 200 is realized.

In an embodiment, as shown in fig. 1, the force transmission structure rear section 300 includes a left rear longitudinal beam 28, a right rear longitudinal beam 29, and a rear impact beam 30, a front end of the left rear longitudinal beam 28 is fixedly connected to a left end of the second cross beam 8 and a right side of the left inner sill panel rear connecting plate 17, a front end of the right rear longitudinal beam 29 is fixedly connected to a right end of the second cross beam 8 and a left side of the right inner sill panel rear connecting plate 20, and the rear impact beam 30 is fixedly connected between a rear end of the left rear longitudinal beam 28 and a rear end of the right rear longitudinal beam 29.

The rear impact beam 30 is bolted on the left side to the left rear side member 28 and on the right side to the right rear side member 29.

In one embodiment, as shown in fig. 1, the left rear side member 28 includes a left rear side member front section 2802 and a left rear side member rear section 2803, a front end of the left rear side member front section 2802 is welded to a left end of the second cross member 8, and a front end of the left rear side member rear section 2803 is welded to a rear end of the left rear side member front section 2802.

The right rear side member 29 includes a right rear side member front section 2902 and a right rear side member rear section 2903, the front end of the right rear side member front section 2902 is welded to the right end of the second cross member 8, and the front end of the right rear side member rear section 2903 is welded to the rear end of the right rear side member front section 2902.

The rear section of the second cross member 8 is welded to the left rear longitudinal member front section 2802 and the right rear longitudinal member front section 2902, respectively, and is connected to the force transmission structure rear section 300.

In one embodiment, as shown in fig. 1, the force transmission structure rear section 300 further includes a plurality of rear cross members fixedly connected in parallel between the left rear longitudinal beam 28 and the right rear longitudinal beam 29.

In the embodiment shown in fig. 1, the force transfer structure rear section 300 comprises four rear cross members, namely a first rear cross member 31, a second rear cross member 32, a third rear cross member 33 and a fourth rear cross member 34. The first rear cross member 31, the second rear cross member 32 and the third rear cross member 33 are welded between the left rear longitudinal beam front section 2802 and the right rear longitudinal beam front section 2902, and the fourth rear cross member 34 is welded between the left rear longitudinal beam rear section 2803 and the right rear longitudinal beam rear section 2903, so that the strength of the force transmission structure rear section 300 is connected and strengthened, and the structural integrity is stronger.

In one embodiment, as shown in fig. 2, the force transfer structure of the vehicle body further comprises a T-shaped battery tray 700 for placing a battery pack, wherein the battery tray 700 comprises a transverse portion 7001 and a longitudinal portion 7002 located in front of the transverse portion 7001, the left side of the longitudinal portion 7002 is fixedly connected to the left battery pack mounting longitudinal beam 6, and the right side of the longitudinal portion 7002 is fixedly connected to the right battery pack mounting longitudinal beam 7.

The front end of the left rear longitudinal beam 28 is provided with a battery pack left mounting bracket 2801, and the left end of the transverse portion 7001 is fixedly connected to the battery pack left mounting bracket 2801. A battery pack right mounting bracket 2901 is provided at the front end of the right rear side member 29, and the right end of the lateral portion 7001 is fixedly connected to the battery pack right mounting bracket 2901.

In an embodiment, as shown in fig. 20 to 22, the force transmission structure of the vehicle body further includes a left mounting bolt and a right mounting bolt, the left side of the battery tray 700 is provided with a left tray leg 7003, the left tray leg 7003 is provided with a first left mounting hole penetrating along the height direction of the vehicle body, the left mounting longitudinal beam 6 of the battery pack is provided with a second left mounting hole penetrating along the height direction of the vehicle body at a position corresponding to the first left mounting hole, and the first left mounting hole and the second left mounting hole are fixedly connected through the left mounting bolt, so that the left side of the battery tray 700 is fixedly connected to the left mounting longitudinal beam 6 of the battery pack.

As shown in fig. 22, a right tray leg 7004 is disposed on the right side of the battery tray 700, a first right mounting hole penetrating along the height direction of the vehicle body is disposed on the right tray leg 7004, a second right mounting hole penetrating along the height direction of the vehicle body is disposed at a position on the right battery pack mounting longitudinal beam 7 corresponding to the first right mounting hole, and the first right mounting hole and the second right mounting hole are fixedly connected through the right mounting bolt, so that the right side of the battery tray 700 is fixedly connected to the right battery pack mounting longitudinal beam 7.

In one embodiment, as shown in fig. 7 to 14, the first cross member 5, the left front longitudinal member rear section inner connecting plate 9, the right front longitudinal member rear section inner connecting plate 10, the battery pack left mounting longitudinal member 6, and the battery pack right mounting longitudinal member 7 constitute a battery pack protecting frame.

During frontal collision, the frontal collision load force is effectively decomposed by the left front longitudinal beam rear section inner connecting plate 9 and the right front longitudinal beam rear section inner connecting plate 10, part of the frontal collision load force is transmitted to the battery pack left mounting longitudinal beam 6 and the battery pack right mounting longitudinal beam 7, and then the frontal collision load force is transmitted to the rear of the vehicle through the battery pack left mounting longitudinal beam 6 and the battery pack right mounting longitudinal beam 7. The first cross beam 5 provides tensile stress and bending stress when the front collision load force is transmitted in the left front longitudinal beam rear section inner connecting plate 9 and the right front longitudinal beam rear section inner connecting plate 10 and the battery pack left mounting longitudinal beam 6 and the battery pack right mounting longitudinal beam 7, so that the damage to the battery pack, which may be caused by plastic crushing, local deformation and the like of the vehicle body frame, is effectively inhibited, and the overall structural strength and bending resistance are improved.

In one embodiment, as shown in fig. 15 to 22, the main driving seat front cross beam 11, the main driving seat rear cross beam 12, the battery pack left protective longitudinal beam 35, the assistant driving seat front cross beam 13, the assistant driving seat rear cross beam 14 and the battery pack right protective longitudinal beam 36 constitute a battery pack side impact protection frame.

The front main driving seat beam 11, the rear main driving seat beam 12 and the left battery pack protection longitudinal beam 35 form a C-shaped frame, and the front auxiliary driving seat beam 13, the rear auxiliary driving seat beam 14 and the right battery pack protection longitudinal beam 36 form another C-shaped frame. The side load is decomposed by a protection structure consisting of two C-shaped frames and then transmitted to the other side through the battery pack mounting longitudinal beam (the battery pack left mounting longitudinal beam 6 or the battery pack right mounting longitudinal beam 7) and the battery tray 700, so that the load is transmitted to the maximum extent, the battery pack is protected completely, and the safety of a passenger compartment is ensured.

The force transmission structure of the vehicle body provided by the invention has the following force transmission process:

(1) the force transfer structure transfers the force of the front section 100.

As shown in fig. 3, when a front side of the vehicle body is involved in a collision, the front impact beam 25 is first contacted. The front impact beam 25 absorbs and transmits the impact force a to the left front side member front section 26 on the left rear side thereof to form a force transmission path a, and the front impact beam front section 27 on the right rear side thereof to form a force transmission path b. The front left front longitudinal beam section 26 transmits the collision force to the left front mounting bracket 500 of the front subframe welded thereto, and transmits the collision force to the rear left front longitudinal beam section 1 behind the front left front longitudinal beam section to form a force transmission path c; the front right front side member front section 27 transmits the collision force to the front sub-frame right front mounting bracket 600 welded thereto, and transmits the collision force to the rear right front side member rear section 2 behind it to form a force transmission path d. The front subframe 400 receives the resultant force from the front subframe left front mounting bracket 500 and from the front subframe right front mounting bracket 600 and transmits the collision force to the left front side member rear section inner connection plate 9 and the right front side member rear section inner connection plate 10, forming a force transmission path e and a force transmission path f.

(2) The force transfer of the middle section 200 of the force transfer structure.

As shown in fig. 4 and 5, the collision force transmitted to the left front side member rear section 1 is decomposed into three component forces, which are transmitted to the left front side member rear section inner connecting plate 9, the left rocker inner panel front connecting plate 15, and the left front floor side sill 3, respectively. The front connecting plate 15 of the left doorsill inner plate transmits the received impact force to the left doorsill inner plate 16, and transmits the impact force to the rear connecting plate 17 of the left doorsill inner plate and the left rear longitudinal beam 28 through the left doorsill inner plate 16 to form a force transmission path g; the left front floor lower longitudinal beam 3 transmits the received collision force to the left rear longitudinal beam 28 and the second cross beam 8 to form a force transmission path h; the collision force received by the connecting plate 9 in the rear section of the left front longitudinal beam is transmitted to the second cross beam 8 through the left mounting longitudinal beam 6 of the battery pack to form a force transmission path i.

The collision force transmitted to the right front side member rear section 2 is decomposed into three directional component forces, which are transmitted to the right front side member rear section inner connecting plate 10, the right rocker inner panel front connecting plate 18, and the right front floor side sill 4, respectively. The front connecting plate 18 of the right threshold inner plate transmits the received impact force to the right threshold inner plate 19, and transmits the impact force to the rear connecting plate 20 of the right threshold inner plate and the right rear longitudinal beam 29 through the right threshold inner plate 19 to form a force transmission path j; the right front floor lower longitudinal beam 4 transmits the received collision force to the right rear longitudinal beam 29 and the second cross beam 8 to form a force transmission path k; the collision force applied to the connecting plate 10 in the rear section of the right front longitudinal beam is transmitted to the second cross beam 8 through the battery pack right mounting longitudinal beam 7 to form a force transmission path l.

The battery tray 700 receives collision force from the battery pack left mounting longitudinal beam 6 and the battery pack right mounting longitudinal beam 7 during collision, and forms a battery pack left side force transmission path m and a battery pack right side force transmission path n. The impact force on the battery tray 700 is transmitted to the left rear side rail 28 of the force transmission structure rear section 300 through the battery pack left mounting bracket 2801 to form a force transmission path o; at the same time, the impact force on the battery pack is also transmitted to the right rear side member 29 of the force transmission structure rear section 300 through the battery pack right mounting bracket 2901, thereby forming a force transmission path p.

(3) The force transfer of the rear section 300 of the force transfer structure.

As shown in fig. 6, collision forces from the force transmission paths g, h, i, and o of the vehicle body front collision force transmission structure middle section 200 are transmitted to the left rear side member front section 2802, and then transmitted to the left rear side member rear section 2803 through the left rear side member front section 2802, thereby forming a force transmission path q. Collision forces from force transmission paths j, k, l and p of the vehicle body front collision force transmission structure middle section 200 are transmitted to the right rear side member front section 2902 and then transmitted to the right rear side member rear section 2903 through the right rear side member front section 2902, so that a force transmission path r is formed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. a vehicle body force transmission structure, is characterized in that, comprises the front section of the force transmission structure, the middle section of the force transmission structure and the rear section of the force transmission structure, and the middle section of the force transmission structure is connected to the front section of the force transmission structure and the rear section of the force transmission structure between; the rear section of the force transmission structure includes a left rear longitudinal beam and a right rear longitudinal beam;

The middle section of the force transmission structure includes the rear section of the left front longitudinal beam, the rear section of the right front longitudinal beam, the left front underfloor longitudinal beam, the right front underfloor longitudinal beam, the first transverse beam, the battery pack left mounting longitudinal beam, the battery pack right mounting longitudinal beam and the first transverse beam. Two transverse beams, the first transverse beam is fixedly connected between the front end of the rear section of the left front longitudinal beam and the front end of the rear section of the right front longitudinal beam, and the front end of the battery pack left installation longitudinal beam is fixedly connected to the first On the beam, the front end of the battery pack right mounting longitudinal beam is fixedly connected to the first beam, the battery pack left mounting longitudinal beam is located on the left side of the battery pack right mounting longitudinal beam, the left front floor is vertically The front end of the beam is fixedly connected to the rear end of the rear section of the left front longitudinal beam, the front end of the right front underfloor longitudinal beam is fixedly connected to the rear end of the rear section of the right front longitudinal beam, and the rear end of the left front underfloor longitudinal beam is fixedly connected. , the rear end of the left mounting longitudinal beam of the battery pack, the rear end of the right mounting longitudinal beam of the battery pack, and the rear end of the right front underfloor longitudinal beam are fixedly connected to the second beam from left to right;

The body force transmission structure further includes a "T"-shaped battery tray for placing battery packs, the battery tray includes a transverse part and a longitudinal part located in front of the transverse part, and the left side of the longitudinal part is fixedly connected to the The battery pack is installed on the left side beam, and the right side of the longitudinal portion is fixedly connected to the battery pack right side beam;

The front end of the left rear longitudinal beam is provided with a battery pack left mounting bracket, and the left end of the transverse portion is fixedly connected to the battery pack left mounting bracket;

The front end of the right rear longitudinal beam is provided with a right battery pack mounting bracket, and the right end of the transverse portion is fixedly connected to the battery pack right mounting bracket.

2 . The vehicle body force transmission structure according to claim 1 , wherein the middle section of the force transmission structure further comprises an inner connecting plate in the rear section of the left front longitudinal beam and an inner connecting plate in the rear section of the right front longitudinal beam. 2 . The front end of the connecting plate in the section is fixedly connected with the left end of the first beam and the front end of the rear section of the left front longitudinal beam, and the rear end of the connecting plate in the rear section of the left front longitudinal beam is connected with the left end of the battery pack left installation longitudinal beam. Front end fixed connection;

The front end of the connecting plate in the rear section of the right front longitudinal beam is fixedly connected to the right end of the first cross beam and the front end of the rear section of the right front longitudinal beam, and the rear end of the connecting plate in the rear section of the right front longitudinal beam is connected to the battery The front end of the package right mounting stringer is fixedly attached.

3. The vehicle body force transmission structure according to claim 1, wherein the middle section of the force transmission structure further comprises a front beam of the main driver's seat, a rear beam of the main driver's seat, a front beam of the passenger seat, and a rear beam of the passenger seat. a beam, the front beam of the driver's seat, the rear beam of the driver's seat, the front beam of the passenger seat, and the rear beam of the passenger seat are located between the first beam and the second beam in the front-rear direction of the vehicle body;

The front beam of the driver's seat is fixedly connected between the rear section of the left front longitudinal beam and the left mounting beam of the battery pack, and the rear beam of the driver's seat is fixedly connected to the left front underfloor beam and the left side of the battery pack. Between the installation longitudinal beams, the front beam of the driver's seat is located in front of the rear beam of the driver's seat;

The front cross beam of the passenger seat is fixedly connected between the rear section of the right front longitudinal beam and the right mounting longitudinal beam of the battery pack, and the rear cross beam of the passenger seat is fixedly connected to the right front underfloor longitudinal beam and the right mounting longitudinal beam of the battery pack between the beams, the front beam of the passenger seat is located in front of the rear beam of the passenger seat;

The front beam of the driver's seat and the front beam of the passenger seat are located on the same straight line, and the rear beam of the driver's seat and the rear beam of the passenger seat are located on the same straight line.

4 . The vehicle body force transmission structure according to claim 3 , wherein the middle section of the force transmission structure further comprises a left rocker inner panel front connecting plate, a left rocker inner panel, a left rocker inner panel rear connecting plate, and a right rocker inner panel front connecting plate. 4 . the connecting plate, the right sill inner plate and the rear connecting plate of the right sill inner plate;

The right end of the front connecting plate of the left rocker inner panel is fixedly connected to the front end of the rear section of the left front longitudinal beam, the left end of the front connecting plate of the left rocker inner panel is fixedly connected to the front end of the left rocker inner panel, and the left rocker inner panel is fixedly connected to the front end of the left rocker inner panel. The rear end of the inner panel is fixedly connected to the front end of the rear connecting plate of the left rocker inner panel, the right side of the rear connecting plate of the left rocker inner panel is fixedly connected to the left end of the second beam, and the front of the driver's seat is fixedly connected. The left end of the cross member extends to the left and is fixedly connected to the left rocker inner panel, and the left end of the rear cross member of the driver's seat extends to the left and is fixedly connected to the left rocker inner panel;

The left end of the front connecting plate of the right rocker inner panel is fixedly connected to the front end of the rear section of the right front longitudinal beam, the right end of the front connecting plate of the right rocker inner panel is fixedly connected to the front end of the right rocker inner panel, and the right rocker inner panel is fixedly connected to the front end of the right rocker inner panel. The rear end of the inner panel is fixedly connected with the front end of the rear connecting plate of the right rocker inner panel, the left side of the rear connecting plate of the right rocker inner panel is fixedly connected with the right end of the second beam, and the front beam of the passenger seat The right end of the passenger seat extends to the right and is fixedly connected to the right rocker inner panel, and the right end of the rear cross member of the passenger seat extends to the right and is fixedly connected to the right rocker inner panel.

5. The vehicle body force transmission structure according to claim 4, wherein the middle section of the force transmission structure further comprises a left connecting reinforcing plate, a left front under-floor connecting plate, a right connecting reinforcing plate and a right front under-floor connecting plate;

The left connecting reinforcing plate is fixedly connected between the left rocker inner plate and the rear section of the left front longitudinal beam, and the left front underfloor connecting plate is fixedly connected between the left rocker inner plate and the left front underfloor longitudinal beam between, the left connecting reinforcing plate is located in front of the left front underfloor connecting plate;

The right connecting reinforcing plate is fixedly connected between the right rocker inner plate and the rear section of the right front longitudinal beam, and the right front underfloor connecting plate is fixedly connected between the right rocker inner plate and the right front underfloor longitudinal beam In between, the right connecting reinforcing plate is located in front of the right front underfloor connecting plate.

6 . The vehicle body force transmission structure according to claim 2 , wherein the front section of the force transmission structure comprises a front anti-collision beam, a front section of a left front longitudinal beam and a front section of a right front longitudinal beam, and the front anti-collision beam is fixedly connected to the Between the front end of the front section of the left front longitudinal member and the front end of the front section of the right front longitudinal member, the rear end of the front section of the left front longitudinal member is fixedly connected with the front end of the rear section of the left front longitudinal member, and the rear end of the front section of the right front longitudinal member is fixedly connected. It is fixedly connected with the front end of the rear section of the right front longitudinal beam.

7. The vehicle body force transmission structure according to claim 6, wherein the vehicle body force transmission structure further comprises a front subframe, a left front mounting bracket of the front subframe and a right front mounting bracket of the front subframe;

The left front mounting bracket of the front subframe is fixedly connected to the front section of the left front longitudinal beam, and the right front mounting bracket of the front subframe is fixedly connected to the front section of the right front longitudinal beam;

The left side of the front end of the front subframe is fixedly connected to the left front mounting bracket of the front subframe, the right side of the front end of the front subframe is fixedly connected to the right front mounting bracket of the front subframe, and the The left side of the rear end of the front subframe is fixedly connected to the inner connecting plate of the rear section of the left front longitudinal beam, and the right side of the rear end of the front subframe is fixedly connected to the inner connecting plate of the rear section of the right front longitudinal beam.

8 . The vehicle body force transmission structure according to claim 5 , wherein the rear section of the force transmission structure comprises a rear anti-collision beam, the front end of the left rear longitudinal beam, the left end of the second cross beam and the The right side of the rear connecting plate of the left rocker inner plate is fixedly connected, the front end of the right rear longitudinal beam is fixedly connected with the right end of the second cross beam and the left side of the rear connecting plate of the right rocker inner plate, and the rear anti-collision plate is fixedly connected. A beam is fixedly connected between the rear end of the left rear side member and the rear end of the right rear side member.

9 . The vehicle body force transmission structure according to claim 8 , wherein the rear section of the force transmission structure further comprises a plurality of rear cross members, and the plurality of rear cross members are fixedly connected to the left rear longitudinal member in parallel. 10 . and the right rear longitudinal member.

10. An automobile, characterized in that it comprises the vehicle body force transmission structure according to any one of claims 1-9.