CN219565267U - Lightweight 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 body structure

technical field

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

Background technique

At present, the automobile industry is developing rapidly, but if the automobile wants to obtain better power performance, stability performance and safety performance, the whole vehicle needs to have a good lightweight level, and the body plays a pivotal role in the whole vehicle. The lightweight of the body The design has a great positive benefit on the performance of the vehicle, so the car needs to have an excellent lightweight design body.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a lightweight vehicle body structure, which enables the vehicle body to have high performance, high safety and excellent lightweight level.

The lightweight car body structure according to the embodiment of the present utility model includes: a car body frame, the car body frame includes a connected front cabin assembly, a middle floor assembly and a rear cabin assembly; The cover includes a connected top cover assembly, side wall assembly and fender assembly; wherein, the front cabin assembly, the middle floor assembly and the rear cabin assembly are all made of aluminum alloy, The top cover assembly, the side wall assembly and the fender assembly are all made of carbon fiber composite material as an integral part.

According to the lightweight car body structure of the embodiment of the present invention, the lightweight car body structure includes a car body frame and a body cover, the car body frame is made of aluminum alloy, and the body cover is an integral part made of carbon fiber composite material, which can make The body has high performance, high safety, and excellent lightweight level, and body panels can also improve the vehicle's dent resistance and rigidity.

According to some embodiments of the present utility model, the front cabin assembly includes a left front longitudinal beam, a right front longitudinal beam, a front anti-collision beam mounting plate and a front longitudinal beam rear plate, and the left front longitudinal beam and the right front longitudinal beam both include The front section of the longitudinal beam and the middle section of the longitudinal beam, the front end of the front section of the longitudinal beam is fixedly connected with the installation plate of the front anti-collision beam, 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 front end of the front section of the longitudinal beam is fixedly connected. The rear end of the middle section is fixedly connected with the rear panel of the front longitudinal beam; the front section of the longitudinal beam is an aluminum alloy extrusion profile, the middle section of the longitudinal beam is a low-pressure cast aluminum part, and the rear panel of the front longitudinal beam is a high-pressure cast aluminum part .

According to some embodiments of the present utility model, the front cabin assembly further includes: a front anti-collision beam, a left front energy-absorbing box, and a right front energy-absorbing box, and the front anti-collision beam mounting plate includes a front anti-collision beam left mounting plate and The right mounting plate of the front anti-collision beam, the front end of the left front energy-absorbing box is connected to the left side of the front anti-collision beam, and the rear end of the front energy-absorbing box is installed with the left mounting plate of the front anti-collision beam, so 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 front energy-absorbing box is installed with the right mounting plate of the front anti-collision beam, the front anti-collision beam, the left front The energy-absorbing box and the right front energy-absorbing box are aluminum alloy extruded profiles; the left mounting plate of the front anti-collision beam and the right mounting plate of the front anti-collision beam are low-pressure cast aluminum parts.

According to some embodiments of the present utility model, the front nacelle assembly further includes: a front tower seat and a front top dam, the front tower seat is connected to the middle section of the longitudinal beam and the front top dam, and the front tower seat It is a high-pressure cast aluminum part, and the front top dam is a low-pressure cast aluminum part.

According to some embodiments of the present invention, the front nacelle assembly further includes: a dash panel, the dash panel is installed on the upper side of the rear panel of the front longitudinal beam, and the dash panel is extruded aluminum alloy pieces.

According to some embodiments of the present invention, the lightweight vehicle body structure further includes an A-pillar assembly, and the A-pillar assembly includes: an A-pillar lower column body, an A-pillar upper column body, and an A-pillar upper side beam, and the The upper beam of the A-pillar is connected between the lower column of the A-pillar and the upper column of the A-pillar, the lower column of the A-pillar is an extruded aluminum alloy profile, and the upper column of the A-pillar is a tubular steel piece, The upper side beam of the A-pillar is a stamped steel plate.

According to some embodiments of the present utility model, the roof always includes a roof body, a left A-pillar upper outer panel, and a right A-pillar upper outer panel, and the left A-pillar upper outer panel is located on the left side of the The outer side of the A-pillar upper cylinder, the right A-pillar upper outer panel is located on the outer side of the right A-pillar upper cylinder; the roof body, the left A-pillar upper outer panel and the right The upper outer panel of the side A-pillar is an integral part made of carbon fiber composite material.

According to some embodiments of the present invention, the side wall assembly includes: a left wall assembly, the left wall assembly includes a left door frame and a left wall panel, and the left door frame includes a left A-pillar lower outer panel 1. The outer panel of the left B-pillar and the outer panel of the left sill, the lower outer panel of the left A-pillar is located on the outer side of the lower column of the A-pillar on the left side; the right side wall assembly, the right side wall assembly includes the right door frame and the right panel, the right door frame includes the right A-pillar lower outer panel, the right B-pillar outer panel and the right door sill outer panel, the right A-pillar lower outer panel is located on the outside of the A-pillar lower column on the right side ; The left side enclosure assembly and the right side enclosure assembly are both integral parts made of carbon fiber composite materials.

According to some embodiments of the present utility model, the middle floor assembly includes: a left sill beam, a right sill beam, a left floor, a right floor and a middle channel beam, the left side of the left floor is connected to the The left sill beam is fixedly connected, the right side of the left floor is fixedly connected to the left side of the middle channel beam, the right side of the middle channel beam is fixedly connected to the right floor, and the right side of the right floor The right side is fixedly connected with the right side sill beam, wherein, the left side sill beam, the right side sill beam and the middle channel beam are all extruded aluminum alloy parts, the left floor, the right The side floors are all aluminum stamping parts.

According to some embodiments of the present utility model, the rear engine room assembly includes: a rear panel, a left rear longitudinal beam, a right rear longitudinal beam, a left mounting plate of the rear anti-collision beam, and a right mounting plate of the rear anti-collision beam. The front end of the rear longitudinal beam and the front end of the right rear longitudinal beam are fixedly connected with the rear panel, the rear end of the left rear longitudinal beam is fixedly connected with the left mounting plate of the rear anti-collision beam, and the right rear The rear end of the longitudinal beam is fixedly connected to the right mounting plate of the rear anti-collision beam, wherein the left rear longitudinal beam and the right rear longitudinal beam are high-pressure cast aluminum parts.

According to some embodiments of the present utility model, the rear cabin assembly further includes a rear cabin rear beam and a middle floor rear beam, and the front and rear ends of the left rear longitudinal beam are connected to the rear cabin rear beam and the middle floor respectively. The rear beam is fixedly connected, and the front and rear ends of the right rear longitudinal beam are respectively fixedly connected with the rear cabin rear beam and the middle floor rear beam to construct a battery protection frame that allows batteries to be accommodated.

According to some embodiments of the present utility model, the rear cabin rear beam and the middle floor rear beam are aluminum alloy extruded profiles

According to some embodiments of the present invention, the rear engine room assembly further includes: a rear anti-collision beam, a left rear energy-absorbing box, and a right rear energy-absorbing box, and the rear anti-collision beam installation plate includes a rear anti-collision beam left installation plate and the right mounting plate of the rear anti-collision beam, the rear end of the left rear energy-absorbing box is connected to the left side of the rear anti-collision beam, and the front end of the left rear energy-absorbing box is installed 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 installed with the right mounting plate of the rear anti-collision beam, the rear anti-collision beam, the The left rear energy-absorbing box and the right rear energy-absorbing box are aluminum alloy extruded 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 cast aluminum parts.

According to some embodiments of the present invention, the rear nacelle assembly includes a D-pillar body and a D-pillar joint, the D-pillar joint is connected between the rear panel and the D-pillar body, and the D-pillar joint For low-pressure cast aluminum parts.

According to some embodiments of the present utility model, the fender assembly includes: a front hatch cover, a left fender and a right fender, the rear ends of the left fender are respectively connected to the roof The cover assembly and the side wall assembly are fixedly connected, and the rear end of the right side fender is fixedly connected with the roof assembly and the side wall assembly respectively; the front hatch cover, the The left fender and the right fender are an integral piece made of carbon fiber composite material.

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

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a perspective view of a lightweight vehicle body structure according to some embodiments of the present invention;

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

Fig. 3 is a side view of the front nacelle assembly in Fig. 1;

Fig. 4 is a perspective view of the middle floor assembly in Fig. 1;

Fig. 5 is a perspective view of the rear nacelle assembly in Fig. 1;

Fig. 6 is a perspective view of another angle of the rear nacelle assembly in Fig. 5;

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

Reference signs:

100. Lightweight car body structure; 101. Car body frame; 102. Body coverings;

10. Front cabin assembly; 11. Front anti-collision beam; 12. Left front energy-absorbing box; 13. Right front energy-absorbing box; 14. Anti-collision beam installation plate; 141. Front anti-collision beam left installation plate; 15. Left front longitudinal beam; 151. Front section of longitudinal beam; 152. Middle section of longitudinal beam; 16. Right front longitudinal beam; 17. Front top dam; 181. Rear panel of front longitudinal beam; 182. Cowl panel;

20. Middle floor assembly; 21. Left threshold beam; 22. Right threshold beam; 23. Left floor; 24. Right floor; 25. Middle channel beam;

30. Rear engine room assembly; 31. Rear panel; 32. Middle floor rear beam; 331. D-pillar body; 332. D-pillar joint; 341. Left rear longitudinal beam; 342. Right rear longitudinal beam; 35. Rear engine room Rear beam; 361, left rear energy-absorbing box; 362, right rear energy-absorbing box; 37, rear anti-collision beam; 38, rear top dam; 391, left rear tower reinforcement plate; 392, right rear tower reinforcement plate;

40. Top cover assembly; 41. Top cover body; 42. Upper outer panel of left A-pillar;

50. Side wall assembly; 5. Left wall assembly; 51. Left door frame; 511. Left A-pillar lower outer panel; 512. Left B-pillar outer panel; 513. Left door sill outer panel; 52. Left side panel ; 53, the right panel;

60. Fender assembly; 61. Front hatch cover; 62. Left fender;

70. A-pillar assembly; 71. A-pillar lower column; 72. A-pillar upper side beam.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

The following describes a lightweight vehicle body structure 100 according to an embodiment of the present invention with reference to FIGS. 1-7 .

According to the lightweight vehicle body structure 100 of the embodiment of the present invention, referring to FIGS. The vehicle body frame 101 includes a front nacelle assembly 10 , a middle floor assembly 20 and a rear nacelle assembly 30 , and the front nacelle assembly 10 , the middle floor assembly 20 and the rear nacelle assembly 30 are connected. The body panel 102 includes a roof assembly 40 , a side panel assembly 50 and a fender assembly 60 , and the roof assembly 40 , the side panel assembly 50 and the fender assembly 60 are connected. Specifically, the fender assembly 60 covers the front cabin assembly 10 and the side panel assembly 50, the roof assembly 40 covers the middle floor assembly 20, and the side panel assembly 50 covers the middle floor assembly. 20 and the side of the rear nacelle assembly 30.

In some examples, the front nacelle assembly 10, the middle floor assembly 20 and the rear nacelle assembly 30 can be connected together by means of welding, screwing, riveting, etc. to form the vehicle body frame 101; 50 is fixed to the vehicle body frame 101 by welding, gluing, screwing, etc., and then the roof front beam and roof rear beam are fixed to the side wall assembly 50 by welding, riveting, screwing, etc., and then through the structure The glue bonds the roof assembly 40 to the roof front beam and the roof rear beam, and finally the fender assembly 60 is screwed to the front cabin assembly 10 and the side wall assembly 50 . All the above structures constitute the lightweight vehicle body structure 100, which provides integration and installation functions for other systems.

Among them, the front cabin assembly 10, the middle floor assembly 20 and the rear cabin assembly 30 are all made of aluminum alloy, so that the body has the characteristics of collision energy absorption, ultra-high rigidity and strength, and can provide safety protection for the occupants in the vehicle; Moreover, the vehicle body frame 101 made of aluminum alloy has an excellent lightweight level. The top cover assembly 40 , the side panel assembly 50 and the fender assembly 60 are all made of carbon fiber composite material as an integral part. The carbon fiber composite material has strong strength and can improve the dent resistance and rigidity of the body panel 102 ; and The carbon fiber composite material is light in weight, and the body cover 102 can reduce the weight of the vehicle body by using the carbon fiber composite material; the integral part made of the carbon fiber composite material has good appearance quality and texture properties, which can improve the sense of quality of the vehicle.

According to the lightweight car body structure 100 of the embodiment of the present invention, the lightweight car body structure 100 includes a car body frame 101 and a car body cover 102, the car body frame 101 is made of aluminum alloy, and the car body cover 102 is made of carbon fiber composite material The integrated part can make the vehicle body have high performance, high safety, and excellent lightweight level, and the body cover 102 can also improve the dent resistance and rigidity of the vehicle.

According to some embodiments of the present utility model, referring to Fig. 1-Fig. 3, the front nacelle assembly 10 includes a left front longitudinal beam 15, a right front longitudinal beam 16, a front anti-collision beam mounting plate 14 and a front longitudinal beam rear plate 181, and the left front longitudinal beam 15 and the right front longitudinal beam 16 both comprise a longitudinal beam front section 151 and a longitudinal beam middle section 152, the front end of the longitudinal beam front section 151 is fixedly connected with the front anti-collision beam mounting plate 14, and the rear end of the longitudinal beam front section 151 is fixed to the front end of the longitudinal beam middle section 152 Connection, the rear end of the longitudinal beam middle section 152 is fixedly connected with the front longitudinal beam rear plate 181 . The left front side beam 15 can include the front section of the left side beam and the middle section of the left side beam. plate. The rear end of the middle section of the left longitudinal beam can be connected to the rear panel of the left front longitudinal beam, and the rear end of the middle section of the right longitudinal beam can be connected to the rear panel of the right front longitudinal beam. 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, which can increase the structural strength of the front end of the vehicle. The left front side beam 15 and the right front side beam 16 are only composed of two parts, the front section of the side beam 151 and the middle section of the side beam 152, which can simplify the structures of the left front side beam 15 and the right front side beam 16, and facilitate the construction of the left front side beam 15 and the right front side beam 16. assembly, and can also realize the weight reduction of the left front side member 15 and the right front side member 16, and improve the lightweight level of the vehicle body.

According to some embodiments of the present utility model, referring to Fig. 1-Fig. 3, the front section 151 of the longitudinal beam is an aluminum alloy extruded profile, the middle section 152 of the longitudinal beam is a low-pressure cast aluminum part, and the rear plate 181 of the front longitudinal beam is a high-pressure cast aluminum part. The structural strength of die-cast aluminum parts and high-pressure cast aluminum parts is higher than that of aluminum alloy extruded profiles, that is, the structural strength of the middle section 152 of the longitudinal beam and the rear panel 181 of the front longitudinal beam are higher than the structure of the front section 151 of the longitudinal beam strength. When the vehicle collides, the structural strength of the front section 151 of the longitudinal beam is lower than that of the middle section 152 of the longitudinal beam, and the front section 151 of the longitudinal beam can be deformed by force and collapse to absorb energy; Stronger, the middle section 152 of the longitudinal beam and the rear panel 181 of the front longitudinal beam are not easy to be deformed and torn, and can provide safety protection for the occupants in the vehicle.

According to some embodiments of the present utility model, referring to Fig. 1-Fig. 3, the front cabin assembly 10 also includes a front anti-collision beam 11, a left front energy-absorbing box 12, and a right front energy-absorbing box 13, and the front anti-collision beam mounting plate 14 includes a front Anti-collision beam left mounting plate 141 and front anti-collision beam right mounting plate 142, the front end of left front energy-absorbing box 12 is connected to the left side of front anti-collision beam 11, and the rear end of left front energy-absorbing box 12 is installed with front anti-collision beam left Mounting plate 141, the rear end of front anti-collision beam left mounting plate 141 is connected with left front longitudinal beam 15; The front anti-collision beam right mounting plate 142, the rear end of the front anti-collision beam right mounting plate 142 is connected with the right front longitudinal beam 16.

The front anti-collision beam 11 , the left front crash box 12 and the right front crash box 13 are all extruded aluminum alloy profiles, which are low in cost and can be used in large quantities in the vehicle body frame 101 . The left mounting plate 141 of the front anti-collision beam and the right mounting plate 142 of the front anti-collision beam are all low-pressure cast aluminum parts. The connection strength of the left mounting plate 141 of the anti-collision beam can also increase the connection strength of the right front crash box 13 and the right mounting plate 142 of the front anti-collision beam. 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 be deformed by force and collapse to absorb energy; the left mounting plate 141 of the front anti-collision beam and the right mounting plate 142 of the front anti-collision beam It is not easy to deform and tear, which can protect the safety of the occupants in the car.

According to some embodiments of the present utility model, referring to Fig. 1-Fig. 3, the front nacelle assembly 10 also includes a front tower seat, a front top dam 17, the front tower seat is connected to the longitudinal beam middle section 152 and the front top dam 17, and the front tower seat It can include a left front tower and a right front tower, the left front tower can be connected to the middle section of the left longitudinal beam and the front top dam 17, the right front tower can be connected to the middle section of the right longitudinal beam and the front top dam 17, the left front tower, the right front tower, The front top dam 17, the left front longitudinal beam 15 and the right front longitudinal beam 16 jointly construct an accommodation space, and the front shock absorber of the chassis is installed in the accommodation space. The front tower base is a high-pressure cast aluminum part, and the front top dam 17 is a low-pressure cast aluminum part. The structural strength of the front tower base and the front top dam 17 is relatively strong, and can carry the weight of the front shock absorber of the chassis; the front top dam 17 is lightweight. The key joint area of the car body structure 100, the front tower and the middle section of the longitudinal beam 152 are the key load-bearing structures, and the design of low-pressure cast aluminum parts and high-pressure cast aluminum parts can enhance the structural strength of the front end of the vehicle and achieve better bearing capacity. effect.

According to some embodiments of the present utility model, referring to FIGS. 1-3 , the front nacelle assembly 10 further includes a dash panel 182, the dash panel 182 is installed on the upper side of the front longitudinal beam rear panel 181, and the dash panel 182 is made of aluminum. The low cost of the alloy extruded parts, the aluminum alloy extruded parts, can make the cost of the dash panel 182 low, thereby reducing the cost of the vehicle.

According to some embodiments of the present utility model, with reference to FIGS. 1-3 , the lightweight vehicle body structure 100 further includes an A-pillar assembly 70, and the A-pillar assembly 70 includes an A-pillar lower column body 71, an A-pillar upper column body, and an A-pillar upper column body. The upper side beam 72 of the pillar, the upper side beam 72 of the A pillar is connected between the lower pillar body 71 of the A pillar and the upper pillar body of the A pillar. The lower column body 71 of the A-pillar is an extruded aluminum alloy profile, which is relatively low in cost and has a certain structural strength. The upper column of the A-pillar is a tubular steel part. For example, the upper column of the A-pillar adopts a 3D rolled closed-end tubular structure. The tensile strength of the tubular steel part is as high as 1500Mpa, which can make the upper column of the A-pillar highly integrated and reduce the cost of the upper column of the A-pillar. The number of parts of the body is improved, the lightweight design is improved, and it has good collision and bending resistance. At the same time, it can reduce the cross-section of the A-pillar, reduce the obstacle angle of the A-pillar assembly 70, and improve driving safety. The A-pillar upper side beam 72 is a stamped steel plate, and the stamped steel plate structure is stronger. When the vehicle collides, the A-pillar upper side beam 72 can withstand a large impact force, improving the safety of the occupants in the vehicle.

According to some embodiments of the present utility model, referring to FIG. 1 , the top cover assembly 40 includes a top cover body 41 , a left A-pillar upper outer panel 42 and a right A-pillar upper outer panel, and the left A-pillar upper outer panel 42 is located The outer side of the left A-pillar upper cylinder, the left A-pillar upper outer panel 42 can cover the left A-pillar upper cylinder, the right A-pillar upper outer panel is located on the outer side of the right A-pillar upper cylinder, the right The upper outer panel of the side A-pillar can cover the upper column body of the A-pillar on the right side, and the top cover assembly 40 is an integral part made of carbon fiber composite material, which can facilitate the installation of the top cover assembly 40 and also makes the top cover assembly 40 have a good The appearance quality and texture attributes of the vehicle can improve the quality of the vehicle. The roof body 41, the left A-pillar upper outer panel 42 and the right A-pillar upper outer panel are designed as an integrated structure, and the pre-preg carbon fiber autoclave molding process can be used to improve the integration of the roof assembly 40. Reduce connection and management costs; and the weight of the top cover assembly 40 is relatively light, which can improve the lightweight design of the vehicle, make the center of gravity of the vehicle low, and have great benefits in improving the stability of the chassis.

In some examples, the top cover body 41 is provided with a top cover front crossbeam and a top cover rear crossbeam, and the top cover front crossbeam and the top cover rear crossbeam are connected to the top cover body 41 and the A-pillar upper column for supporting the top cover body 41. The top cover front beam and the top cover rear beam are aluminum stamping parts, which can further improve the structural strength of the top cover assembly 40 .

According to some embodiments of the present utility model, with reference to Fig. 1-Fig. 3, side enclosure assembly 50 comprises left enclosure assembly 5, right enclosure assembly, and side enclosure assembly 50 is an integral part that carbon fiber composite material is formed, can It facilitates the installation of the side wall assembly 50 and saves unnecessary installation steps. The left side wall assembly 5 includes a left door frame 51 and a left side wall panel 52. The left door frame 51 includes a left A-pillar lower outer panel 511, a left B-pillar outer panel 512 and a left door sill outer panel 513. The left door frame 51 is a semi-frame structure , can reduce the weight of left surrounding assembly 5. The right side wall assembly includes the right door frame and the right side wall panel 53, and the right door frame includes the lower outer panel of the right A pillar, the right B pillar outer panel and the right threshold outer panel, and the right door frame is a half frame structure, which can reduce the total amount of the right wall. As a result, the weight of the side panel assembly 50 can be reduced.

The left A-pillar lower outer panel 511 is located outside the left A-pillar lower cylinder 71, the right A-pillar lower outer panel is located outside the right A-pillar lower outer panel 71, the left A-pillar lower outer panel 511, the right A-pillar The lower outer panel is an integral part made of carbon fiber composite material, which can make the left A-pillar lower outer panel 511 and the right A-pillar lower outer panel have good appearance quality and texture properties, and can improve the sense of quality of the vehicle. The integral part made of carbon fiber composite material has high strength and light weight, which can improve the dent resistance and rigidity of the side wall assembly 50, and can also reduce the weight of the side wall assembly 50, so as to realize the lightweight design of the vehicle.

According to some embodiments of the present utility model, with reference to Fig. 1-Fig. The left side of the 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 channel beam 25, the right side of the middle channel beam 25 is fixedly connected to the right side floor 24, and the right side The right side of the floor 24 is fixedly connected with the right side sill beam 22 , and the middle channel beam 25 can strengthen the structural strength of the middle floor assembly 20 . The left sill beam 21, the right sill beam 22 and the middle channel beam 25 are composed of only one part, which can improve the integration of the left sill beam 21, the right sill beam 22 and the middle channel beam 25, and at the same time improve the middle floor assembly 20 lightweight levels.

Among them, the left sill beam 21, the right sill beam 22 and the middle channel beam 25 are all extruded aluminum alloy parts, the left floor 23 and the right floor 24 are all aluminum alloy stamped parts, and the structural strength of the aluminum alloy extruded parts Greater than the structural strength of the aluminum alloy stamping parts, that is, the structural strength of the left side sill beam 21, the right side sill beam 22 and the middle channel beam 25 is stronger, so that the middle floor assembly 20 has high rigidity and high strength. , the left side sill beam 21 and the right side sill beam 22 can withstand a certain impact force, and the middle channel beam 25 can disperse the impact force to improve the safety of the occupants in the vehicle.

In some examples, the left sill beam 21 , the right sill beam 22 and the middle channel beam 25 are formed by extruding aluminum alloys with unequal thickness. In the hollow cavity, a plurality of partitions are formed in the hollow cavity, and the plurality of partitions divide the hollow cavity into a plurality of sub-hollow cavities, and the plurality of partitions can extend along 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, the thickness of the side wall of the right side sill beam 22 is also different from that of the partition, and the thickness of the side wall of the middle channel beam 25 is also different from that of the partition. 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, and the thickness of the partition extending along the up and down direction of the hollow cavity is 2.0mm, and the thickness of the separator extending along the left and right directions of the hollow cavity is 3.0mm. The left side sill beam 21, the right side sill beam 22 and the middle channel beam 25 are designed with hollow cavities, which can reduce the weight of the left side sill beam 21, the right side sill beam 22 and the middle channel beam 25, so as 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 deform under force, collapse and absorb energy, so as to protect the safety of the occupants in the vehicle.

According to some embodiments of the present utility model, referring to Fig. 1-Fig. 2 and Fig. 5-Fig. The mounting plate and the right mounting plate of the rear anti-collision beam, the front end of the left rear longitudinal beam 341 and the front end of the right rear longitudinal beam 342 are all fixedly connected with the rear panel 31, and the rear end of the left rear longitudinal beam 341 is installed on the left side of the rear anti-collision beam. The plates are fixedly connected, and the rear end of the right rear longitudinal beam 342 is fixedly connected with the right mounting plate of the rear anti-collision beam. Among them, the left rear longitudinal beam 341 and the right rear longitudinal beam 342 are all high-pressure cast aluminum parts, and the left rear longitudinal beam 341 and the right rear longitudinal beam 342 are all designed in one piece, which can reduce the number of left rear longitudinal beams 341 and right rear longitudinal beams 342. The number of components can increase the integration of the left rear longitudinal beam 341 and the right rear longitudinal beam 342, reduce connection and management costs, and at the same time have the effect of improving the overall weight reduction of the left rear longitudinal beam 341 and the right rear longitudinal beam 342. For example, the wall thickness of the left rear side member 341 and the right rear side member 342 may range from 2.5 mm to 3.0 mm. The structural strength of the high-pressure cast aluminum parts is greater than that of the aluminum alloy extruded profiles. When the vehicle collides, the left rear longitudinal beam 341 and the right rear longitudinal beam 342 are the main dispersion paths of the impact force, and the left rear longitudinal beam 341 and the right rear longitudinal beam 341 The rear longitudinal beam 342 can withstand a certain impact force and can protect the safety of the occupants in the vehicle.

According to some embodiments of the present utility model, with reference to Fig. 1-Fig. 2, Fig. 5-Fig. They are respectively fixedly connected to the middle floor rear beam 32 and the rear cabin rear beam 35, and the front and rear ends of the right rear longitudinal beam 342 are respectively fixedly connected to the middle floor rear beam 32 and the rear cabin rear beam 35 to construct a battery protection frame that allows batteries to be accommodated . The rear end of the battery protection frame is a rear anti-collision beam 37, a left rear energy-absorbing box 361, and a right rear energy-absorbing box 362, which are used to protect the battery and ensure the safety of the battery. The battery is installed in the battery protection frame, so that the battery does not occupy the space of the floor assembly 20, the height of the vehicle can be reduced, the vehicle has the characteristics of a low center of gravity, and the extreme stability of the chassis can be improved; and the vehicle can also be built with a low profile sporty styling.

According to some embodiments of the present utility model, with reference to Fig. 1-Fig. 2, Fig. 5-Fig. 7, the rear crossbeam 35 of the rear cabin and the rear crossbeam 32 of the mid-floor are all aluminum alloy extruded profiles, and the strength of the aluminum alloy extruded profiles is moderate. The rear cabin rear beam 35 and the mid-floor rear beam 32 have sufficient strength and safety, so that the battery protection frame can better carry and protect the battery, and has the advantage of lightweight design.

According to some embodiments of the present utility model, referring to Fig. 1-Fig. 2 and Fig. 5-Fig. The rear end of the rear energy-absorbing box 361 is connected to the left side of the rear anti-collision beam 37, the front end of the left rear energy-absorbing box 361 is equipped with the left mounting plate of the rear anti-collision beam, and the rear end of the right rear energy-absorbing box 362 is connected to the rear anti-collision beam. On the right side of the impact beam 37, the front end of the right rear energy-absorbing box 362 is equipped with a rear anti-collision beam right mounting plate.

The rear anti-collision beam 37 , the left rear crash box 361 and the right rear crash box 362 are all extruded aluminum alloy profiles, which are low in cost and can be used in large quantities 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 all low-pressure cast aluminum parts. The connection strength of the left mounting plate of the impact beam can also increase the connection strength of the right rear energy-absorbing box 362 and the right mounting plate of the rear anti-collision beam. When the vehicle collides, the rear anti-collision beam 37, the left rear energy-absorbing box 361, and the right rear energy-absorbing box 362 can be deformed by 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 It is not easy to deform and tear, which can protect the safety of the occupants in the car.

In some examples, the rear nacelle assembly 30 further includes a rear top dam 38, one end of the rear top dam 38 is connected to the left rear longitudinal beam 341 through the left rear tower reinforcement plate 391, and the other end of the rear top dam 38 is connected through the right rear tower The seat reinforcement plate 392 is connected to the right rear side member 342 . The rear top dam 38, the left rear tower seat reinforcement plate 391 and the right rear tower seat reinforcement plate 392 are all low-pressure cast aluminum parts. The structural strength of the low-pressure cast aluminum parts is relatively strong. The plate 392 is used in the joint area of the vehicle body frame 101 to improve the connection strength between different structures of the vehicle body frame 101 .

According to some embodiments of the present utility model, with reference to Fig. 1-Fig. 2, Fig. 5-Fig. Between the D-pillar body 331, the D-pillar joint 332 is a low-pressure cast aluminum part, which has high structural strength. Both the D-pillar body 331 and the D-pillar joint 332 are composed of one part. On the basis of the structural strength of the D-pillar joint 332, the structure of the D-pillar body 331 and the D-pillar joint 332 can be simplified, the weight of the D-pillar body 331 and the D-pillar joint 332 can be reduced, and the installation of the D-pillar body 331 and the D-pillar joint 332 can be facilitated. The D-pillar body 331 and the D-pillar joint 332 are used as the joint structure of the vehicle body frame 101, which can improve the connection strength of the vehicle body frame 101, and can also improve the overall performance of the vehicle body frame; at the same time, because the joint structure of the vehicle body frame 101 has a higher degree of integration , reducing redundant parts, can further reduce the weight of the vehicle.

According to some embodiments of the present utility model, referring to FIG. 1 , the fender assembly 60 includes a front hatch cover 61 , a left fender 62 and a right fender, and the rear ends of the left fender 62 are respectively connected to The top cover assembly 40 and the side wall assembly 50 are fixedly connected, and the rear end of the right side fender is fixedly connected to the top cover assembly 40 and the side wall assembly 50 respectively. The fender assembly 60 is an integral part made of carbon fiber composite material, and the front hatch cover 61, the left fender 62 and the right fender are designed as an integrated structure, which can improve the stability of the fender assembly 60. The degree of integration reduces the connection structure, and at the same time improves the lightweight effect of the fender assembly 60 . For example, the fender assembly 60 may be connected to the vehicle body frame 101 in a screwed manner.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right" etc. The orientation or positional relationship is only for the convenience of describing the utility model and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a reference to the utility model. limits. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the description of this specification, descriptions with reference to the terms "some embodiments", "optionally", "further" or "some examples" mean that specific features, structures, materials or Features are included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (14)

1. A lightweight car body structure, characterized in that it comprises: a vehicle body frame, the vehicle body frame comprising a connected front nacelle assembly, a mid-floor assembly and a rear nacelle assembly; a body panel comprising a roof assembly, a side panel assembly and a fender assembly connected; wherein, The front cabin assembly, the middle floor assembly and the rear cabin assembly are all made of aluminum alloy, and the top cover assembly, the side wall assembly and the fender assembly are all made of carbon fiber A single piece of composite material. 2. The lightweight vehicle body structure according to claim 1, wherein the front cabin assembly includes a left front longitudinal beam, a right front longitudinal beam, a front anti-collision beam mounting plate and a front longitudinal beam rear plate, and the left front Both the longitudinal beam and the right front longitudinal beam include a front section of the longitudinal beam and a middle section of the longitudinal beam; The front end of the front section of the longitudinal beam is fixedly connected to the mounting plate of the front anti-collision beam, the rear end of the front section of the longitudinal beam is fixedly connected to the front end of the middle section of the longitudinal beam, and the rear end of the middle section of the longitudinal beam is connected to the front anti-collision beam. The fixed connection of the 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 cast aluminum part, and the rear plate of the front longitudinal beam is a high-pressure cast aluminum part. 3. The lightweight vehicle body structure according to claim 2, wherein the front cabin assembly further comprises: a front anti-collision beam, a left front energy-absorbing box, and a right front energy-absorbing box, and the front anti-collision beam is installed The plates include the left mounting plate of the front anti-collision beam and the right mounting plate of the front anti-collision beam; The front end of the left front energy-absorbing box is connected to the left side of the front anti-collision beam, and the rear end of the left front energy-absorbing box is installed 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, and the rear end of the right front energy-absorbing box is installed with the right mounting plate of the front anti-collision beam, The front anti-collision beam, the left front crash box and the right front crash box are all extruded aluminum alloy profiles; Both the left mounting plate of the front anti-collision beam and the right mounting plate of the front anti-collision beam are low-pressure cast aluminum parts. 4. The lightweight vehicle body structure according to claim 2, wherein the front nacelle assembly further comprises: a front tower, a front top dam, the front tower is connected to the middle section of the longitudinal beam and the As for the front top dam, the front tower base is a high-pressure cast aluminum part, and the front top dam is a low-pressure cast aluminum part. 5. The lightweight vehicle body structure according to claim 2, characterized in that, the front nacelle assembly further comprises: a dash panel, the dash panel is installed on the upper side of the rear panel of the front longitudinal beam, The dash board is an aluminum alloy extruded part. 6. The lightweight vehicle body structure according to claim 2, further comprising an A-pillar assembly, said A-pillar assembly comprising: The A-pillar lower column body, the A-pillar upper column body and the A-pillar upper side beam, the A-pillar upper side beam is connected between the A-pillar lower column body and the A-pillar upper column body, and the A-pillar lower column body It is an aluminum alloy extruded profile, the upper column of the A-pillar is a tubular steel piece, and the upper side beam of the A-pillar is a stamped steel plate. 7. The lightweight vehicle body structure according to claim 6, wherein the roof assembly comprises a roof body, an upper outer panel of the left A-pillar and an upper outer panel of the right A-pillar, the left The A-pillar upper outer panel is located outside the left A-pillar upper cylinder, and the right A-pillar upper outer panel is located outside the right A-pillar upper cylinder; The top cover body, the left A-pillar upper outer panel and the right A-pillar upper outer panel are an integral part made of carbon fiber composite material. 8. The lightweight vehicle body structure according to claim 6, wherein the side wall assembly comprises: The left side wall assembly, the left side wall assembly includes the left door frame and the left side wall panel, the left door frame includes the left A-pillar lower outer panel, the left B-pillar outer panel and the left door sill outer panel, the left A-pillar The lower outer panel is located on the outer side of the lower column of the A-pillar on the left; The right side wall assembly, the right side wall assembly includes the right door frame and the right side wall panel, the right door frame includes the right A-pillar lower outer panel, the right B-pillar outer panel and the right door sill outer panel, the right A-pillar The lower outer panel is located on the outer side of the lower column of the A-pillar on the right side; Both the left side enclosure assembly and the right side enclosure assembly are integral parts made of carbon fiber composite materials. 9. The lightweight vehicle body structure according to claim 1, wherein the middle floor assembly comprises: a left sill beam, a right sill beam, a left floor, a right floor and a middle channel beam, The left side of the left floor is fixedly connected to the left sill beam, the right side of the left floor is fixedly connected to the left side of the middle channel beam, and the right side of the middle channel beam is fixedly connected to the right The side floor is fixedly connected, and the right side of the right floor is fixedly connected with the right door sill beam, wherein the left door sill beam, the right door sill beam and the middle channel beam are extruded aluminum alloy parts, the left floor and the right floor are all aluminum alloy stamping parts. 10. The lightweight vehicle body structure according to claim 1, characterized in that, the rear cabin assembly comprises: a rear panel, a left rear longitudinal beam, a right rear longitudinal beam, a left mounting plate of the rear anti-collision beam and a rear The right mounting plate of the anti-collision beam, the front ends of the left rear longitudinal beam and the front ends of the right rear longitudinal beam are fixedly connected with the rear panel, the rear end of the left rear longitudinal beam is connected with the rear anti-collision beam The left mounting plate is fixedly connected, and the rear end of the right rear longitudinal beam is fixedly connected with the right mounting plate of the rear anti-collision beam, wherein both the left rear longitudinal beam and the right rear longitudinal beam are high-pressure cast aluminum parts. 11. The lightweight car body structure according to claim 10, characterized in that, the rear cabin assembly also includes a rear cabin rear beam and a middle floor rear beam, and the front and rear ends of the left rear longitudinal beam are respectively connected to the The rear cabin rear beam is fixedly connected to the middle floor rear beam, and the front and rear ends of the right rear longitudinal beam are respectively fixedly connected to the rear cabin rear beam and the middle floor rear beam to construct a battery that can accommodate batteries. protective frame; Both the rear engine room rear beam and the middle floor rear beam are extruded aluminum alloy profiles. 12. The lightweight car body structure according to claim 10, wherein the rear cabin assembly further comprises: a rear anti-collision beam, a left rear energy-absorbing box, and a right rear energy-absorbing box; The rear end of the left rear energy-absorbing box is connected to the left side of the rear anti-collision beam, and the front end of the left rear energy-absorbing box is installed 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, and the front end of the right rear energy-absorbing box is installed 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 extruded aluminum alloy profiles; Both the left mounting plate of the rear anti-collision beam and the right mounting plate of the rear anti-collision beam are low-pressure cast aluminum parts. 13. The lightweight vehicle body structure according to claim 10, wherein the rear nacelle assembly comprises a D-pillar body and a D-pillar joint, and the D-pillar joint is connected between the rear panel and the D-pillar. Between the pillar bodies, the D-pillar joint is a low-pressure cast aluminum part. 14. The lightweight vehicle body structure according to claim 1, wherein the fender assembly comprises: a front hatch cover, a left fender and a right fender, the left fender The rear end of the sub-board is fixedly connected with the top cover assembly and the side wall assembly respectively, and the rear end of the right side fender is fixedly connected with the top cover assembly and the side wall assembly respectively ; The front hatch cover, the left side fender and the right side fender are an integral part made of carbon fiber composite material.