CN219565267U - Lightweight car body structure - Google Patents

Abstract

The utility model discloses a lightweight car body structure, which comprises a car body frame and a car body covering piece, wherein the car body frame comprises a front cabin assembly, a middle floor assembly and a rear cabin assembly which are connected; the vehicle body panel comprises a top cover assembly, a side wall assembly and a fender assembly which are connected; wherein, front cabin assembly, well floor assembly and back cabin assembly all adopt aluminum alloy material, and top cap assembly, side wall assembly and fender assembly all adopt the integrated piece that carbon fiber composite material constitutes. According to the light-weight vehicle body structure provided by the embodiment of the utility model, the light-weight vehicle body structure comprises the vehicle body frame and the vehicle body covering piece, wherein the vehicle body frame is made of an aluminum alloy material, and the vehicle body covering piece is an integral piece made of a carbon fiber composite material, so that the vehicle body has high performance, high safety and excellent light-weight level, and the vehicle body covering piece can further improve the dent resistance and rigidity of the vehicle.

Description

Lightweight car body structure

Technical Field

The utility model relates to the technical field of vehicles, in particular to a lightweight vehicle body structure.

Background

At present, the automobile industry rapidly develops, but the automobile wants to obtain better dynamic performance, stability performance and safety performance, the whole automobile is required to have good light-weight level, the automobile body occupies the role of weight in the whole automobile, the light-weight design of the automobile body has great positive benefit on the whole automobile performance, and therefore the automobile is required to have an excellent light-weight design of the automobile body.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Accordingly, an object of the present utility model is to provide a lightweight vehicle body structure that provides a vehicle body with high performance, high safety, and an excellent level of weight reduction.

A lightweight vehicle body structure according to an embodiment of the present utility model includes: the vehicle body frame comprises a front cabin assembly, a middle floor assembly and a rear cabin assembly which are connected; a body panel including a roof assembly, a side wall assembly, and a fender assembly connected; the front cabin assembly, the middle floor assembly and the rear cabin assembly are all made of aluminum alloy materials, and the top cover assembly, the side wall assembly and the fender assembly are all made of integrated pieces made of carbon fiber composite materials.

According to the light-weight vehicle body structure provided by the embodiment of the utility model, the light-weight vehicle body structure comprises the vehicle body frame and the vehicle body covering piece, wherein the vehicle body frame is made of an aluminum alloy material, and the vehicle body covering piece is an integral piece made of a carbon fiber composite material, so that the vehicle body has high performance, high safety and excellent light-weight level, and the vehicle body covering piece can further improve the dent resistance and rigidity of the vehicle.

According to some embodiments of the present utility model, the front cabin assembly includes a left front side rail, a right front side rail, a front bumper beam mounting plate, and a front side rail rear plate, each of the left front side rail and the right front side rail includes a rail front section and a rail middle section, a front end of the rail front section is fixedly connected to the front bumper beam mounting plate, a rear end of the rail front section is fixedly connected to a front end of the rail middle section, and a rear end of the rail middle section is fixedly connected to the front side rail rear plate; the front section of the longitudinal beam is an aluminum alloy extrusion profile, the middle section of the longitudinal beam is a low-pressure casting aluminum piece, and the rear plate of the front longitudinal beam is a high-pressure casting aluminum piece.

According to some embodiments of the utility model, the front nacelle assembly further comprises: the front anti-collision beam comprises a front anti-collision beam left mounting plate and a front anti-collision beam right mounting plate, the front end of the left front energy-absorption box is connected to the left side of the front anti-collision beam, the rear end of the front energy-absorption box is provided with the front anti-collision beam left mounting plate, the front end of the right front energy-absorption box is connected to the right side of the front anti-collision beam, the rear end of the front energy-absorption box is provided with the front anti-collision beam right mounting plate, and the front anti-collision beam, the left front energy-absorption box and the right front energy-absorption box are all aluminum alloy extruded profiles; the left front anti-collision beam mounting plate and the right front anti-collision beam mounting plate are both low-pressure casting aluminum pieces.

According to some embodiments of the utility model, the front nacelle assembly further comprises: front tower seat, preceding top dam, preceding tower seat connect in longeron middle section with preceding top dam, preceding tower seat is high-pressure casting aluminum part, preceding top dam is low-pressure casting aluminum part.

According to some embodiments of the utility model, the front nacelle assembly further comprises: the front coaming is installed on the upper side of the front longitudinal beam rear plate, and is an aluminum alloy extrusion piece.

According to some embodiments of the utility model, the lightweight vehicle body structure further comprises an a-pillar assembly, the a-pillar assembly comprising: the aluminum alloy extrusion type column comprises an A column lower column body, an A column upper column body and an A column upper edge beam, wherein the A column upper edge beam is connected between the A column lower column body and the A column upper column body, the A column lower column body is an aluminum alloy extrusion profile, the A column upper column body is a tubular steel piece, and the A column upper edge beam is a stamping steel plate.

According to some embodiments of the utility model, the roof generally comprises a roof body, a left a-pillar upper outer panel located outside of the left a-pillar upper pillar, and a right a-pillar upper outer panel located outside of the right a-pillar upper pillar; the top cover body, the left side A column upper outer plate and the right side A column upper outer plate are integrated pieces made of carbon fiber composite materials.

According to some embodiments of the utility model, the side wall assembly comprises: the left side wall assembly comprises a left door frame and a left side coaming, the left door frame comprises a left A column lower outer plate, a left B column outer plate and a left threshold outer plate, and the left A column lower outer plate is positioned on the outer side of the left A column lower column; the right side wall assembly comprises a right door frame and a right side coaming, the right door frame comprises a right A column lower outer plate, a right B column outer plate and a right threshold outer plate, and the right A column lower outer plate is positioned on the outer side of the right A column lower column; the left side wall assembly and the right side wall assembly are all integrated pieces made of carbon fiber composite materials.

According to some embodiments of the utility model, the mid-floor assembly comprises: left side threshold roof beam, right side threshold roof beam, left side floor, right side floor and well passageway roof beam, the left side of left side floor with left side threshold roof beam fixed connection, the right side of left side floor with the left side fixed connection of well passageway roof beam, the right side of well passageway roof beam with right side floor fixed connection, the right side of right side floor with right side threshold roof beam fixed connection, wherein, left side threshold roof beam right side threshold roof beam with well passageway roof beam is aluminum alloy extrusion spare, left side floor the right side floor is aluminum alloy extrusion spare.

According to some embodiments of the utility model, the aft nacelle assembly includes: the novel anti-collision device comprises a back coaming, a left back longitudinal beam, a right back longitudinal beam, a left back anti-collision beam mounting plate and a right back anti-collision beam mounting plate, wherein the front end of the left back longitudinal beam and the front end of the right back longitudinal beam are fixedly connected with the back coaming, the rear end of the left back longitudinal beam is fixedly connected with the left back anti-collision beam mounting plate, the rear end of the right back longitudinal beam is fixedly connected with the right back anti-collision beam mounting plate, and the left back longitudinal beam and the right back longitudinal beam are high-pressure casting aluminum pieces.

According to some embodiments of the utility model, the rear cabin assembly further comprises a rear cabin rear cross member and a middle floor rear cross member, the front and rear ends of the left rear longitudinal member are fixedly connected with the rear cabin rear cross member and the middle floor rear cross member respectively, and the front and rear ends of the right rear longitudinal member are fixedly connected with the rear cabin rear cross member and the middle floor rear cross member respectively to construct a battery protection frame allowing to accommodate a battery.

According to some embodiments of the utility model, the rear cabin rear cross member and the middle floor rear cross member are all aluminum alloy extruded profiles

According to some embodiments of the utility model, the rear nacelle assembly further comprises: the rear anti-collision beam comprises a rear anti-collision beam left mounting plate and a rear anti-collision beam right mounting plate, wherein the rear end of the left rear energy-absorption box is connected to the left side of the rear anti-collision beam, the front end of the left rear energy-absorption box is provided with the rear anti-collision beam left mounting plate, the rear end of the right rear energy-absorption box is connected to the right side of the rear anti-collision beam, the front end of the right rear energy-absorption box is provided with the rear anti-collision beam right mounting plate, and the rear anti-collision beam, the left rear energy-absorption box and the right rear energy-absorption box are all aluminum alloy extrusion profiles; the left mounting plate of the rear anti-collision beam and the right mounting plate of the rear anti-collision beam are low-pressure casting aluminum pieces.

According to some embodiments of the utility model, the rear nacelle assembly includes a D-pillar body and a D-pillar joint connected between the back panel and the D-pillar body, the D-pillar joint being a low-pressure cast aluminum piece.

According to some embodiments of the utility model, the fender assembly comprises: the front cabin cover plate, the left fender and the right fender, wherein the rear end of the left fender is fixedly connected with the top cover assembly and the side wall assembly respectively, and the rear end of the right fender is fixedly connected with the top cover assembly and the side wall assembly respectively; the front cabin cover plate, the left side fender and the right side fender are integrated pieces made of carbon fiber composite materials.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a perspective view of a lightweight vehicle body structure according to some embodiments of the utility model;

fig. 2 is a perspective view of the body frame in fig. 1;

FIG. 3 is a side view of the forward nacelle assembly of FIG. 1;

FIG. 4 is a perspective view of the mid-floor assembly of FIG. 1;

FIG. 5 is a perspective view of the aft nacelle assembly of FIG. 1;

FIG. 6 is another angled perspective view of the aft nacelle assembly of FIG. 5;

FIG. 7 is a top view of the aft nacelle assembly of FIG. 6.

Reference numerals:

100. a lightweight vehicle body structure; 101. a vehicle body frame; 102. a vehicle body panel;

10. a front nacelle assembly; 11. a front bumper beam; 12. a left front energy absorption box; 13. a right front energy absorption box; 14. an anti-collision beam mounting plate; 141. a left mounting plate of the front anti-collision beam; 142. a front anti-collision beam right mounting plate; 15. left front longitudinal beam; 151. a longitudinal beam front section; 152. a longitudinal beam middle section; 16. a right front side member; 17. a front roof dam; 181. front side rail back plate; 182. a dash panel;

20. a middle floor assembly; 21. left side sill beam; 22. a right side sill beam; 23. a left side floor; 24. a right side floor; 25. a middle channel beam;

30. a rear nacelle assembly; 31. a back panel; 32. a middle floor rear cross member; 331. a D column body; 332. a D column joint; 341. a left rear side member; 342. a right rear side member; 35. a rear cabin rear cross member; 361. a left rear energy absorption box; 362. a right rear energy absorption box; 37. a rear bumper beam; 38. a rear top dam; 391. a left rear tower base reinforcing plate; 392. a right rear tower base reinforcing plate;

40. a top cover assembly; 41. a top cover body; 42. a left side A column upper outer plate;

50. a side wall assembly; 5. a left side wall assembly; 51. a left door frame; 511. a left A pillar lower outer panel; 512. a left B pillar outer panel; 513. a left rocker outer plate; 52. a left side coaming; 53. a right side coaming;

60. a fender assembly; 61. a front hatch cover plate; 62. left fender;

70. a column A assembly; 71. a lower column body of the A column; 72. and a side beam on the A column.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

A lightweight vehicle body structure 100 according to an embodiment of the utility model is described below with reference to fig. 1 to 7.

According to the lightweight vehicle body structure 100 of the embodiment of the utility model, referring to fig. 1 to 7, the lightweight vehicle body structure 100 includes a vehicle body frame 101 and a vehicle body cover 102, the vehicle body cover 102 being overlaid on the vehicle body frame 101. The vehicle body frame 101 includes a front cabin assembly 10, a middle floor assembly 20, and a rear cabin assembly 30, and the front cabin assembly 10, the middle floor assembly 20, and the rear cabin assembly 30 are connected. The body panel 102 includes the roof assembly 40, the side wall assembly 50, and the fender assembly 60, and the roof assembly 40, the side wall assembly 50, and the fender assembly 60 are connected. Specifically, the fender assembly 60 overlies the front nacelle assembly 10 and the side wall assembly 50, the roof assembly 40 overlies the center floor assembly 20, and the side wall assembly 50 overlies the sides of the center floor assembly 20 and the rear nacelle assembly 30.

In some examples, the front cabin assembly 10, the middle floor assembly 20, and the rear cabin assembly 30 may be first joined together by welding, bolting, riveting, etc., to form the vehicle body frame 101; the side wall assembly 50 is fixed to the vehicle body frame 101 by welding, cementing, screwing and the like, the front roof rail and the rear roof rail are fixed to the side wall assembly 50 by welding, riveting, screwing and the like, the top cover assembly 40 is adhered to the front roof rail and the rear roof rail by structural adhesive, and the fender assembly 60 is screwed to the front cabin assembly 10 and the side wall assembly 50. All of the above structures constitute a lightweight vehicle body structure 100 that provides integration and installation for other systems.

The front cabin assembly 10, the middle floor assembly 20 and the rear cabin assembly 30 are made of aluminum alloy materials, so that the automobile body has the characteristics of collision energy absorption, ultrahigh rigidity and strength, and can provide safety protection for passengers in the automobile; the body frame 101 made of an aluminum alloy material has an excellent light weight level. The top cover assembly 40, the side wall assembly 50 and the fender assembly 60 are all integrated pieces made of carbon fiber composite materials, and the carbon fiber composite materials are high in strength, so that the dent resistance and rigidity of the vehicle body panel 102 can be improved; the weight of the carbon fiber composite material is light, and the weight of the vehicle body can be reduced by adopting the carbon fiber composite material for the vehicle body panel 102; the integrated piece formed by the carbon fiber composite material has good appearance quality and texture attribute, and can improve the quality feel of the vehicle.

According to the lightweight vehicle body structure 100 of the embodiment of the utility model, the lightweight vehicle body structure 100 comprises the vehicle body frame 101 and the vehicle body covering member 102, the vehicle body frame 101 is made of aluminum alloy, the vehicle body covering member 102 is an integral piece made of carbon fiber composite material, the vehicle body has high performance, high safety and excellent lightweight level, and the vehicle body covering member 102 can further improve the dent resistance and rigidity of the vehicle.

According to some embodiments of the present utility model, referring to fig. 1-3, the front cabin assembly 10 includes a left front side rail 15, a right front side rail 16, a front bumper beam mounting plate 14, and a front side rail rear plate 181, each of the left front side rail 15 and the right front side rail 16 includes a rail front section 151 and a rail middle section 152, a front end of the rail front section 151 is fixedly connected with the front bumper beam mounting plate 14, a rear end of the rail front section 151 is fixedly connected with a front end of the rail middle section 152, and a rear end of the rail middle section 152 is fixedly connected with the front side rail rear plate 181. The left front side member 15 may include a left side member front section and a left side member middle section, the right front side member 16 may include a right side member front section and a right side member middle section, and the front side member rear plate 181 may include a left front side member rear plate and a right front side member rear plate. The rear end of the left longitudinal beam middle section can be connected to the left front longitudinal beam rear plate, and the rear end of the right longitudinal beam middle section can be connected to the right front longitudinal beam rear plate. The left front side member 15, the right front side member 16, and the front side member rear plate 181 are located at the front end of the vehicle, and the structural strength of the front end of the vehicle can be increased. The left front longitudinal beam 15 and the right front longitudinal beam 16 are only composed of two parts, namely a longitudinal beam front section 151 and a longitudinal beam middle section 152, so that the structures of the left front longitudinal beam 15 and the right front longitudinal beam 16 can be simplified, the assembly of the left front longitudinal beam 15 and the right front longitudinal beam 16 is facilitated, the weight reduction of the left front longitudinal beam 15 and the right front longitudinal beam 16 can be realized, and the light weight level of a vehicle body is improved.

According to some embodiments of the present utility model, referring to fig. 1-3, the front stringer section 151 is an aluminum alloy extruded section, the middle stringer section 152 is a low-pressure cast aluminum part, the front stringer rear plate 181 is a high-pressure cast aluminum part, and the structural strength of the low-pressure cast aluminum part and the structural strength of the high-pressure cast aluminum part are both higher than that of the aluminum alloy extruded section, that is, the structural strength of the middle stringer section 152 and the front stringer rear plate 181 are both higher than that of the front stringer section 151. When a vehicle collides, the structural strength of the front longitudinal beam section 151 is lower than that of the middle longitudinal beam section 152, and the front longitudinal beam section 151 can deform under force, collapse and absorb energy; the strength of the longitudinal beam middle section 152 and the front longitudinal beam rear plate 181 is strong, and the longitudinal beam middle section 152 and the front longitudinal beam rear plate 181 are not easy to deform and tear, so that a safety protection effect can be provided for passengers in a vehicle.

1-3, the front nacelle assembly 10 further includes a front impact beam 11, a left front energy absorber box 12, a right front energy absorber box 13, the front impact beam mounting plate 14 includes a front impact beam left mounting plate 141 and a front impact beam right mounting plate 142, the front end of the left front energy absorber box 12 is connected to the left side of the front impact beam 11, the rear end of the left front energy absorber box 12 is mounted with a front impact beam left mounting plate 141, and the rear end of the front impact beam left mounting plate 141 is connected with a left front longitudinal beam 15; the front end of the right front energy-absorbing box 13 is connected to the right side of the front anti-collision beam 11, a front anti-collision beam right mounting plate 142 is mounted at the rear end of the right front energy-absorbing box 13, and a right front longitudinal beam 16 is connected to the rear end of the front anti-collision beam right mounting plate 142.

The front anti-collision beam 11, the left front energy absorption box 12 and the right front energy absorption box 13 are all aluminum alloy extrusion profiles, the aluminum alloy extrusion profiles have low cost, and the aluminum alloy extrusion profiles can be used in a large amount in the vehicle body frame 101. The left front anti-collision beam mounting plate 141 and the right front anti-collision beam mounting plate 142 are both low-pressure casting aluminum pieces, and the structural strength of the low-pressure casting aluminum pieces is greater than that of aluminum alloy extruded profiles, so that the connection strength of the left front energy-absorbing box 12 and the left front anti-collision beam mounting plate 141 can be increased, and the connection strength of the right front energy-absorbing box 13 and the right front anti-collision beam mounting plate 142 can also be increased. When the vehicle collides, the front anti-collision beam 11, the left front energy-absorbing box 12 and the right front energy-absorbing box 13 can deform under force, collapse and absorb energy; the front anti-collision beam left mounting plate 141 and the front anti-collision beam right mounting plate 142 are not easy to deform and tear, so that the safety of passengers in the vehicle can be protected.

According to some embodiments of the present utility model, referring to fig. 1-3, the front nacelle assembly 10 further includes a front tower, a front top dam 17, the front tower being connected to the stringer middle section 152 and the front top dam 17, the front tower may include a left front tower and a right front tower, the left front tower may be connected to the left stringer middle section and the front top dam 17, the right front tower may be connected to the right stringer middle section and the front top dam 17, the left front tower, the right front tower, the front top dam 17, the left front stringer 15, and the right front stringer 16 together construct a receiving space, and the chassis front shock absorber is installed in the receiving space. The front tower seat is a high-pressure casting aluminum piece, the front top dam 17 is a low-pressure casting aluminum piece, the structural strength of the front tower seat and the front top dam 17 is strong, and the front tower seat and the front top dam 17 can bear the weight of a chassis front shock absorber; the front top dam 17 is a key joint area of the lightweight car body structure 100, the front tower seat and the middle section 152 of the longitudinal beam are key bearing structures, and the design of the low-pressure casting aluminum piece and the high-pressure casting aluminum piece can be used for enhancing the structural strength of the front end of the car and playing a better bearing role.

According to some embodiments of the present utility model, referring to fig. 1-3, the front nacelle assembly 10 further includes a dash panel 182, the dash panel 182 is mounted on an upper side of the front rail rear panel 181, and the dash panel 182 is an aluminum alloy extrusion, which has low cost, so that the cost of the dash panel 182 can be low, and thus the cost of the vehicle can be reduced.

1-3, the lightweight vehicle body structure 100 further includes an A-pillar assembly 70, the A-pillar assembly 70 including an A-pillar lower 71, an A-pillar upper 71, and an A-pillar upper side beam 72, the A-pillar upper side beam 72 being connected between the A-pillar lower 71 and the A-pillar upper. The lower column 71 of the A column is an aluminum alloy extrusion profile, which has lower cost and certain structural strength. The column A is a tubular steel member, for example, the column A adopts a 3D rolled closed tubular structure, the tensile strength of the tubular steel member is up to 1500Mpa, the column A can be highly integrated, the number of parts of the column A is reduced, the lightweight design is improved, the column A has good collision bending resistance, the section of the column A can be reduced, the obstacle angle of the column A assembly 70 is reduced, and the driving safety is improved. The A-pillar upper edge beam 72 is a stamping steel plate, the stamping steel plate is strong in structure, and when a vehicle collides, the A-pillar upper edge beam 72 can bear large impact force, so that safety of passengers in the vehicle is improved.

According to some embodiments of the present utility model, referring to fig. 1, the roof assembly 40 includes a roof body 41, a left a pillar upper outer plate 42 and a right a pillar upper outer plate, the left a pillar upper outer plate 42 is located at an outer side of the left a pillar upper pillar, the left a pillar upper outer plate 42 may cover the left a pillar upper pillar, the right a pillar upper outer plate is located at an outer side of the right a pillar upper pillar, the right a pillar upper outer plate may cover the right a pillar upper pillar, and the roof assembly 40 is an integral piece made of a carbon fiber composite material, so that installation of the roof assembly 40 may be facilitated, and the roof assembly 40 may have good appearance quality and texture properties, so as to enhance a quality feel of a vehicle. The top cover body 41, the left side A column upper outer plate 42 and the right side A column upper outer plate are designed into an integrated structure, and the integration level of the top cover assembly 40 can be improved, and the connection and management cost can be reduced by adopting a prepreg carbon fiber autoclave forming process; and the roof assembly 40 is lighter in weight, so that the lightweight design of the vehicle can be improved, the center of gravity of the vehicle is low, and the lifting chassis is more beneficial to stability.

In some examples, a front top cover beam and a rear top cover beam are disposed in the top cover body 41, and are connected to the top cover body 41 and the column a for supporting the top cover body 41, and the front top cover beam and the rear top cover beam are aluminum alloy stamping parts, which can further improve the structural strength of the top cover assembly 40.

According to some embodiments of the present utility model, referring to fig. 1-3, side wall assembly 50 includes left side wall assembly 5 and right side wall assembly, and side wall assembly 50 is an integral piece made of carbon fiber composite material, so that installation of side wall assembly 50 can be facilitated, and unnecessary installation steps are omitted. The left side wall assembly 5 includes a left door frame 51 and a left side wall plate 52, the left door frame 51 includes a left a pillar lower outer plate 511, a left B pillar outer plate 512 and a left threshold outer plate 513, and the left door frame 51 is of a half frame structure, which can reduce the weight of the left side wall assembly 5. The right side wall assembly comprises a right door frame and a right side wall plate 53, the right door frame comprises a right A column lower outer plate, a right B column outer plate and a right threshold outer plate, the right door frame is of a half-frame structure, the weight of the right side wall assembly can be reduced, and the weight of the side wall assembly 50 can be further reduced.

The left A pillar lower outer plate 511 is located on the outer side of the left A pillar lower column 71, the right A pillar lower outer plate is located on the outer side of the right A pillar lower column 71, and the left A pillar lower outer plate 511 and the right A pillar lower outer plate are integrally made of carbon fiber composite materials, so that the left A pillar lower outer plate 511 and the right A pillar lower outer plate have good appearance quality and texture properties, and the quality sense of a vehicle can be improved. The integrated part made of the carbon fiber composite material has higher strength and lighter weight, can improve the concavity resistance and rigidity of the side wall assembly 50, can reduce the weight of the side wall assembly 50, and realizes the lightweight design of the vehicle.

According to some embodiments of the present utility model, referring to fig. 1-4, the middle floor assembly 20 includes a left side sill beam 21, a right side sill beam 22, a left side floor 23, a right side floor 24, and a middle tunnel beam 25, the left side of the left side floor 23 is fixedly connected to the left side sill beam 21, the right side of the left side floor 23 is fixedly connected to the left side of the middle tunnel beam 25, the right side of the middle tunnel beam 25 is fixedly connected to the right side floor 24, the right side of the right side floor 24 is fixedly connected to the right side sill beam 22, and the middle tunnel beam 25 may strengthen the structural strength of the middle floor assembly 20. The left side sill beam 21, the right side sill beam 22 and the middle passage beam 25 are composed of only one part, so that the integration level of the left side sill beam 21, the right side sill beam 22 and the middle passage beam 25 can be improved, and the light weight level of the middle floor assembly 20 can be improved.

Wherein, left side threshold beam 21, right side threshold beam 22 and well passageway roof beam 25 are aluminum alloy extrusion spare, left side floor 23, right side floor 24 are aluminum alloy extrusion spare, aluminum alloy extrusion spare's structural strength is greater than aluminum alloy extrusion spare's structural strength, left side threshold beam 21 promptly, right side threshold beam 22 and well passageway roof beam 25's structural strength are stronger for well floor assembly 20 has high rigidity and high strength, when the vehicle bumps, left side threshold beam 21, right side threshold beam 22 can bear certain impact, well passageway roof beam 25 can disperse the impact, in order to improve the security of passenger in the car.

In some examples, the left side sill beam 21, the right side sill beam 22 and the middle tunnel beam 25 are formed by using an unequal thickness extrusion aluminum alloy forming process, the left side sill beam 21, the right side sill beam 22 and the middle tunnel beam 25 are formed with a hollow cavity in which a plurality of partitions are formed, the hollow cavity is divided into a plurality of sub-hollow cavities by the plurality of partitions, and the plurality of partitions may extend in both the left-right direction and the up-down direction of the hollow cavity. The thickness of the side wall of the left side sill beam 21 is different from that of the partition plate, the thickness of the side wall of the right side sill beam 22 is also different from that of the partition plate, the thickness of the side wall of the middle channel beam 25 is also different from that of the partition plate, taking the left side sill beam 21 as an example, the thickness of the outer side wall of the left side sill beam 21 can be 2.5mm, the thickness of the inner side wall of the left side sill beam 21 is 3.5mm, the thickness of the partition plate extending along the up-down direction of the hollow cavity is 2.0mm, and the thickness of the partition plate extending along the left-right direction of the hollow cavity is 3.0mm. The left side sill beam 21, the right side sill beam 22 and the center tunnel beam 25 are designed with hollow cavities, so that the weight of the left side sill beam 21, the right side sill beam 22 and the center tunnel beam 25 can be reduced to further reduce the weight of the vehicle. When the vehicle collides, the hollow cavities of the left side sill beam 21 and the right side sill beam 22 can be stressed to deform, collapse and absorb energy so as to protect the safety of passengers in the vehicle.

1-2 and 5-7, the rear nacelle assembly 30 includes a rear bulkhead 31, a left rear rail 341, a right rear rail 342, a rear rail left mounting plate, and a rear rail right mounting plate, the front end of the left rear rail 341 and the front end of the right rear rail 342 are both fixedly connected to the rear bulkhead 31, the rear end of the left rear rail 341 is fixedly connected to the rear rail left mounting plate, and the rear end of the right rear rail 342 is fixedly connected to the rear rail right mounting plate. Wherein, back longeron 341 and right back longeron 342 are the high pressure casting aluminum part after left side, and back longeron 341 and right back longeron 342 are all integrated into one piece design, can reduce back longeron 341 and right back longeron 342's spare part number, promote back longeron 341 and right back longeron 342's integrated level, reduce connection and management cost, have the whole lightweight effect of back longeron 341 and right back longeron 342 simultaneously. For example, the wall thickness of the left and right rear stringers 341, 342 may range from 2.5-3.0mm. The structural strength of the high-pressure aluminum casting is greater than that of the aluminum alloy extruded section, when a vehicle collides, the left rear longitudinal beam 341 and the right rear longitudinal beam 342 are main impact force dispersing paths, and the left rear longitudinal beam 341 and the right rear longitudinal beam 342 can bear certain impact force, so that the safety of passengers in the vehicle can be protected.

1-2 and 5-7, the rear cabin assembly 30 further includes a rear cabin rear cross member 35 and a center floor rear cross member 32, front and rear ends of a left rear longitudinal member 341 are fixedly connected to the center floor rear cross member 32 and the rear cabin rear cross member 35, respectively, and front and rear ends of a right rear longitudinal member 342 are fixedly connected to the center floor rear cross member 32 and the rear cabin rear cross member 35, respectively, to construct a battery protection frame that allows for accommodating a battery. The rear end of the battery protection frame is provided with a rear anti-collision beam 37, a left rear energy absorption box 361 and a right rear energy absorption box 362, so that the battery is protected, and the safety of the battery can be ensured. The battery is arranged in the battery protection frame, so that the battery does not occupy the space of the middle floor assembly 20, the height of the vehicle body can be reduced, the vehicle has the characteristic of low gravity center, and the limit stability performance of the chassis is improved; and can also create a low-profile motion profile for the vehicle.

According to some embodiments of the present utility model, referring to fig. 1-2 and 5-7, the rear cabin rear cross member 35 and the middle floor rear cross member 32 are all aluminum alloy extrusion profiles, and the strength of the aluminum alloy extrusion profiles is moderate, so that the rear cabin rear cross member 35 and the middle floor rear cross member 32 have sufficient strength and safety, so that the battery protection frame can better bear and protect the battery, and has the design advantage of light weight.

1-2 and 5-7, the rear nacelle assembly 30 further includes a rear impact beam 37, a left rear energy-absorbing box 361, and a right rear energy-absorbing box 362, the rear end of the left rear energy-absorbing box 361 being connected to the left side of the rear impact beam 37, the front end of the left rear energy-absorbing box 361 being mounted with a rear impact beam left mounting plate, the rear end of the right rear energy-absorbing box 362 being connected to the right side of the rear impact beam 37, the front end of the right rear energy-absorbing box 362 being mounted with a rear impact beam right mounting plate.

The rear impact beam 37, the left rear crash box 361 and the right rear crash box 362 are all aluminum alloy extrusion profiles, which are low in cost and can be used in a large amount in the vehicle body frame 101. The left mounting plate of the rear anti-collision beam and the right mounting plate of the rear anti-collision beam are low-pressure casting aluminum pieces, and the structural strength of the low-pressure casting aluminum pieces is greater than that of aluminum alloy extruded profiles, so that the connection strength of the left rear energy-absorbing box 361 and the left mounting plate of the rear anti-collision beam can be increased, and the connection strength of the right rear energy-absorbing box 362 and the right mounting plate of the rear anti-collision beam can also be increased. When the vehicle collides, the rear anti-collision beam 37, the left rear energy absorption box 361 and the right rear energy absorption box 362 can deform under force, collapse and absorb energy, and the left mounting plate of the rear anti-collision beam and the right mounting plate of the rear anti-collision beam are not easy to deform and tear, so that the safety of passengers in the vehicle can be protected.

In some examples, the rear nacelle assembly 30 further includes a rear roof dam 38, one end of the rear roof dam 38 being connected to the left rear rail 341 by a left rear tower reinforcement plate 391, and the other end of the rear roof dam 38 being connected to the right rear rail 342 by a right rear tower reinforcement plate 392. The rear top dam 38, the left rear tower base reinforcing plate 391 and the right rear tower base reinforcing plate 392 are all low-pressure casting aluminum pieces, the structural strength of the low-pressure casting aluminum pieces is strong, and the left rear tower base reinforcing plate 391 and the right rear tower base reinforcing plate 392 are used for the joint area of the vehicle body frame 101, so that the connection strength between different structures of the vehicle body frame 101 can be improved.

According to some embodiments of the present utility model, referring to fig. 1-2 and 5-7, the rear nacelle assembly 30 further includes a D-pillar body 331 and a D-pillar joint 332, the D-pillar joint 332 is connected between the back panel 31 and the D-pillar body 331, the D-pillar joint 332 is a low-pressure aluminum part, the low-pressure aluminum part has high structural strength, the D-pillar body 331 and the D-pillar joint 332 are both composed of one piece, the structures of the D-pillar body 331 and the D-pillar joint 332 can be simplified on the basis of ensuring the structural strength of the D-pillar body 331 and the D-pillar joint 332, the weight of the D-pillar body 331 and the D-pillar joint 332 is reduced, and the installation of the D-pillar body 331 and the D-pillar joint 332 is facilitated. The D-pillar body 331 and the D-pillar joint 332 are used as joint structures of the vehicle body frame 101, so that the connection strength of the vehicle body frame 101 can be improved, and the overall performance of the vehicle body frame can be improved; meanwhile, because the joint structure of the vehicle body frame 101 is more integrated, redundant parts are reduced, and the weight of the vehicle can be further reduced.

According to some embodiments of the present utility model, referring to fig. 1, the fender assembly 60 includes a front deck plate 61, a left fender 62 and a right fender, the rear end of the left fender 62 is fixedly connected to the roof assembly 40 and the side wall assembly 50, respectively, and the rear end of the right fender is fixedly connected to the roof assembly 40 and the side wall assembly 50, respectively. The fender assembly 60 is an integral part formed by carbon fiber composite materials, and the front cabin cover plate 61, the left fender 62 and the right fender are designed into an integral structure, so that the integration level of the fender assembly 60 can be improved, the connecting structure is reduced, and the light weight effect of the fender assembly 60 is improved. For example, the fender assembly 60 may be connected to the body frame 101 by screwing.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, reference to the terms "some embodiments," "optionally," "further," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (14)

1. A lightweight vehicle body structure, comprising:

the vehicle body frame comprises a front cabin assembly, a middle floor assembly and a rear cabin assembly which are connected;

a body panel including a roof assembly, a side wall assembly, and a fender assembly connected; wherein,,

the front engine room assembly, the middle floor assembly and the rear engine room assembly are all made of aluminum alloy materials, and the top cover assembly, the side wall assembly and the fender assembly are all integrated pieces made of carbon fiber composite materials.

2. The lightweight vehicle body structure according to claim 1, wherein the front cabin assembly includes a left front rail, a right front rail, a front bumper mounting plate, and a front rail rear plate, the left front rail and the right front rail each including a rail front section and a rail middle section;

the front end of the front section of the longitudinal beam is fixedly connected with the front anti-collision beam mounting plate, the rear end of the front section of the longitudinal beam is fixedly connected with the front end of the middle section of the longitudinal beam, and the rear end of the middle section of the longitudinal beam is fixedly connected with the front longitudinal beam rear plate;

the front section of the longitudinal beam is an aluminum alloy extrusion profile, the middle section of the longitudinal beam is a low-pressure casting aluminum piece, and the rear plate of the front longitudinal beam is a high-pressure casting aluminum piece.

3. The lightweight vehicle body structure of claim 2, wherein said front cabin assembly further comprises: the front anti-collision beam mounting plate comprises a front anti-collision beam left mounting plate and a front anti-collision beam right mounting plate;

the front end of the left front energy-absorbing box is connected to the left side of the front anti-collision beam, the rear end of the left front energy-absorbing box is provided with the left mounting plate of the front anti-collision beam,

the front end of the right front energy-absorbing box is connected to the right side of the front anti-collision beam, the rear end of the right front energy-absorbing box is provided with the right mounting plate of the front anti-collision beam,

the front anti-collision beam, the left front energy-absorbing box and the right front energy-absorbing box are all aluminum alloy extrusion profiles;

the left front anti-collision beam mounting plate and the right front anti-collision beam mounting plate are both low-pressure casting aluminum pieces.

4. The lightweight vehicle body structure of claim 2, wherein said front cabin assembly further comprises: front tower seat, preceding top dam, preceding tower seat connect in longeron middle section with preceding top dam, preceding tower seat is high-pressure casting aluminum part, preceding top dam is low-pressure casting aluminum part.

5. The lightweight vehicle body structure of claim 2, wherein said front cabin assembly further comprises: the front coaming is installed on the upper side of the front longitudinal beam rear plate, and is an aluminum alloy extrusion piece.

6. The lightweight vehicle body structure of claim 2, further comprising an a-pillar assembly, the a-pillar assembly comprising:

the aluminum alloy extrusion type column comprises an A column lower column body, an A column upper column body and an A column upper edge beam, wherein the A column upper edge beam is connected between the A column lower column body and the A column upper column body, the A column lower column body is an aluminum alloy extrusion profile, the A column upper column body is a tubular steel piece, and the A column upper edge beam is a stamping steel plate.

7. The lightweight vehicle body structure according to claim 6, wherein the roof assembly includes a roof body, a left a-pillar upper outer panel and a right a-pillar upper outer panel, the left a-pillar upper outer panel being located outside of the a-pillar upper pillar on the left side, the right a-pillar upper outer panel being located outside of the a-pillar upper pillar on the right side;

the top cover body, the left side A column upper outer plate and the right side A column upper outer plate are integrated pieces made of carbon fiber composite materials.

8. The lightweight vehicle body structure of claim 6, wherein said side wall assembly comprises:

the left side wall assembly comprises a left door frame and a left side coaming, the left door frame comprises a left A column lower outer plate, a left B column outer plate and a left threshold outer plate, and the left A column lower outer plate is positioned on the outer side of the left A column lower column;

the right side wall assembly comprises a right door frame and a right side coaming, the right door frame comprises a right A column lower outer plate, a right B column outer plate and a right threshold outer plate, and the right A column lower outer plate is positioned on the outer side of the right A column lower column;

the left side wall assembly and the right side wall assembly are all integrated pieces made of carbon fiber composite materials.

9. The lightweight vehicle body structure as recited in claim 1, wherein said mid-floor assembly comprises: a left side sill beam, a right side sill beam, a left side floor, a right side floor and a middle passage beam,

the left side of left side floor with left side threshold roof beam fixed connection, the right side of left side floor with the left side fixed connection of well passageway roof beam, the right side of well passageway roof beam with right side floor fixed connection, the right side of right side floor with right side threshold roof beam fixed connection, wherein, left side threshold roof beam right side threshold roof beam with well passageway roof beam is aluminum alloy extrusion spare, left side floor right side floor is aluminum alloy extrusion spare.

10. The lightweight vehicle body structure as recited in claim 1, wherein said rear cabin assembly comprises: the novel anti-collision device comprises a back coaming, a left back longitudinal beam, a right back longitudinal beam, a left back anti-collision beam mounting plate and a right back anti-collision beam mounting plate, wherein the front end of the left back longitudinal beam and the front end of the right back longitudinal beam are fixedly connected with the back coaming, the rear end of the left back longitudinal beam is fixedly connected with the left back anti-collision beam mounting plate, the rear end of the right back longitudinal beam is fixedly connected with the right back anti-collision beam mounting plate, and the left back longitudinal beam and the right back longitudinal beam are high-pressure casting aluminum pieces.

11. The lightweight vehicle body structure according to claim 10, wherein the rear cabin assembly further comprises a rear cabin rear cross member and a center floor rear cross member, the front and rear ends of the left rear side member being fixedly connected to the rear cabin rear cross member and the center floor rear cross member, respectively, and the front and rear ends of the right rear side member being fixedly connected to the rear cabin rear cross member and the center floor rear cross member, respectively, to construct a battery protection frame that allows a battery to be accommodated;

the rear cabin rear cross beam and the middle floor rear cross beam are all aluminum alloy extrusion profiles.

12. The lightweight vehicle body structure of claim 10, wherein said rear cabin assembly further comprises: a rear bumper beam, a left rear energy box, and a right rear energy box;

the rear end of the left rear energy-absorbing box is connected to the left side of the rear anti-collision beam, the front end of the left rear energy-absorbing box is provided with the left mounting plate of the rear anti-collision beam,

the rear end of the right rear energy-absorbing box is connected to the right side of the rear anti-collision beam, the front end of the right rear energy-absorbing box is provided with the right mounting plate of the rear anti-collision beam,

the rear anti-collision beam, the left rear energy-absorbing box and the right rear energy-absorbing box are all aluminum alloy extrusion profiles;

the left mounting plate of the rear anti-collision beam and the right mounting plate of the rear anti-collision beam are low-pressure casting aluminum pieces.

13. The lightweight vehicle body structure of claim 10, wherein the rear cabin assembly includes a D-pillar body and a D-pillar joint connected between the back panel and the D-pillar body, the D-pillar joint being a low pressure cast aluminum piece.

14. The lightweight vehicle body structure as recited in claim 1, wherein the fender assembly comprises: the front cabin cover plate, the left fender and the right fender, wherein the rear end of the left fender is fixedly connected with the top cover assembly and the side wall assembly respectively, and the rear end of the right fender is fixedly connected with the top cover assembly and the side wall assembly respectively;

the front cabin cover plate, the left side fender and the right side fender are integrated pieces made of carbon fiber composite materials.