CN216546397U

CN216546397U - Rear floor assembly structure of new energy automobile

Info

Publication number: CN216546397U
Application number: CN202122784666.9U
Authority: CN
Inventors: 钟华; 常志伟; 陈智家; 丁为广
Original assignee: Zhejiang Zero Run Technology Co Ltd
Current assignee: Zhejiang Zero Run Technology Co Ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-05-17
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses a rear floor assembly structure of a new energy automobile, which comprises a left rear longitudinal beam die casting, a right rear longitudinal beam die casting, a rear floor first cross beam, a rear floor panel, a rear wheel cover inner plate assembly, a rear row seat mounting plate, a rear floor rear panel, a rear collision energy absorption box and a rear floor rear extension plate. The cold connection process is adopted, and a steel plate casting and an aluminum alloy casting are fixedly connected into the automobile rear floor assembly by using screws and matching welding structural adhesive. The utility model can effectively improve the lightweight effect of the automobile body, reduces various welding clamps, checking tools and dies required by the traditional sheet metal rear longitudinal beam welding assembly, reduces the process flow and ensures the whole automobile precision and safety of the new energy automobile.

Description

Rear floor assembly structure of new energy automobile

Technical Field

The utility model relates to the technical field of automobile body structures, in particular to a rear floor assembly structure of a new energy automobile.

Background

Based on the advantages of energy conservation, environmental protection, low noise, high speed and low charging cost of new energy automobiles, people are more and more inclined to select new energy automobiles, and the requirements of people on the riding comfort, the collision safety and the endurance mileage of the new energy automobiles are increasingly improved. Among the prior art, the back floor assembly structure of automobile body generally adopts the steel sheet stamping to take shape the back, welds into steel back floor assembly through many sets of frock clamp, and prior art scheme needs many sets of stamping die, and is with high costs, and the welding divides the preface many, and workshop place demand space is big, and whole car weight height, is unfavorable for the promotion of car lightweight coefficient.

Chinese patent application publication No. CN209290523U, published as 23/08/2019, entitled "rear floor assembly for automobiles", discloses a rear floor assembly made of steel and welded by a plurality of sets of tooling fixtures after being stamped and formed by using steel plates. The utility model discloses an including the rear floor body, back trailing arm support, the automobile body longeron of back longeron and both sides, the part is by welded connection, and it is few to have the structure, firm in connection, and the junction is difficult for splitting, advantage that bulk strength is high. But this utility model required welding divides the preface many, and is high to the demand in workshop, and is unfavorable for automobile body's lightweight.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, considers the requirements of die-casting forming, aluminum alloy materials, a connecting process and the like, and designs a novel rear floor assembly structure based on a new energy automobile. Part of parts of the utility model still use steel, which can ensure good safety performance of the vehicle body.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the rear floor assembly structure of the new energy automobile comprises a left rear longitudinal beam die casting on the left side of an automobile body, a right rear longitudinal beam die casting on the right side of the automobile body, a screw for replacing a welded connection cavity area and a lock rivet for replacing a welded connection flat plate area; the left rear longitudinal beam die casting and the right rear longitudinal beam die casting are both aluminum alloy die castings.

Among the above-mentioned technical scheme, left back longeron die casting, right back longeron die casting are the aluminum alloy die casting, and this improvement has reduced required multiple welding jig, utensil and the mould of traditional panel beating back longeron welding assembly, has reduced process flow, has promoted whole car precision of new energy automobile, resistant security, lightweight effect of hitting. This technical scheme is in order to promote new energy automobile lightweight effect, simultaneously in order to guarantee new energy automobile's security and support intensity, in the spare part of back floor assembly, steel is used to some part, and other part materials are the aluminum alloy, and welding technology can't satisfy the processing requirement of floor assembly behind the car this moment. Therefore, the technical scheme adopts a cold connection process and adopts screws and lock rivets instead of welding. The screws are FDS flow rotating screws, and the locking rivets are SPR locking rivets. Connecting the left rear longitudinal beam die casting, the right rear longitudinal beam die casting and other parts by using FDS (fully drawn yarn) circulation screws; and fixedly connecting the flat plate parts made of different materials by using SPR locking and riveting.

Preferably, the screw joint is provided with a welding structure adhesive, and the lock rivet joint is provided with a welding structure adhesive. In order to effectively improve the connection strength and the mechanical durability of the whole vehicle, improve the sealing corrosion resistance of the whole vehicle, improve the NVH performance of the whole vehicle and solve the problem of electrochemical corrosion of steel and aluminum dissimilar material connection, the FDS circulation screw and the SPR lock rivet are used, and meanwhile, the special welding structure glue for the vehicle body is required to be matched and used.

Preferably, a plurality of cavities are formed in the left rear longitudinal beam die casting and the right rear longitudinal beam die casting, and the left rear longitudinal beam die casting and the right rear longitudinal beam die casting are fixedly connected with the rear floor first cross beam, the rear floor second cross beam, the rear floor third cross beam, the rear floor fourth cross beam, the left rear collision energy absorption box and the left rear wheel cover inner plate assembly through screws.

The left rear longitudinal beam die casting and the right rear longitudinal beam die casting are respectively positioned on the left rear side and the right rear side of the vehicle body and are aluminum alloy die castings processed by a high-vacuum casting process. Compared with the traditional process, the improvement reduces various welding clamps, check tools and dies required by the traditional sheet metal rear longitudinal beam welding assembly, reduces the process flow, and has low requirement on space of a processing workshop; meanwhile, the energy consumption is low, the process is green, and no smoke, steam and spark are generated. The casting is irregular in shape, a cavity is formed in the casting, the bearing strength of the part can be guaranteed, and the safety is guaranteed. When the left rear longitudinal beam die casting and the right rear longitudinal beam die casting are assembled with other parts, FDS (fully drawn yarn) circulation screws are required.

Preferably, the rear floor assembly structure further comprises a rear floor panel I, a rear floor panel II, a rear row seat mounting plate and a rear floor rear panel; the rear floor panel I, the rear floor panel II, the rear row seat mounting plate, the rear floor rear panel, the rear floor first cross beam, the rear floor second cross beam, the rear floor third cross beam and the rear floor fourth cross beam are flat plate areas and are fixedly connected through locking and riveting.

The different boundaries of floor structure after back floor panel I, the adaptation of back floor panel II have promoted the material utilization ratio of part, reduce part mould process, and the first crossbeam of back floor, back floor second crossbeam, back floor third crossbeam, back floor fourth crossbeam can provide powerful performance and support, and back floor panel I, back floor panel II adopt aluminum alloy punching press panel, have reduced whole car weight. The fixed connection of the flat plate area needs SPR lock riveting.

Preferably, a trunk groove reinforcing beam is arranged below the rear panel of the rear floor and used for reinforcing the load-bearing strength of the trunk groove.

Preferably, the left rear longitudinal beam die casting, the right rear longitudinal beam die casting on the right side of the vehicle body, the rear floor first cross beam, the rear floor second cross beam, the rear floor third cross beam, the rear floor fourth cross beam, the right rear collision energy absorption box and the left rear collision energy absorption box are all aluminum alloy extruded sections; the rear floor panel I and the rear floor panel II are both aluminum plates; the rear row seat mounting plate, the rear floor rear panel, the right rear floor rear extension plate, the left rear floor rear extension plate, the battery rear mounting bracket assembly and the trunk trough reinforcing beam are all made of steel plates.

This technical scheme is in order to promote new energy automobile lightweight effect, also to guarantee new energy automobile's security and support intensity simultaneously, consequently in the spare part of back floor assembly, steel is used to some parts, and other part materials are the aluminum alloy.

Preferably, the first cross beam of the rear floor is provided with a battery rear mounting bracket assembly, and the battery rear mounting bracket assembly is made of steel and is fixedly connected to the first cross beam of the rear floor through screws. The structure effectively improves the precision and the strength of the mounting surface of the new energy battery pack, improves the collision performance of the whole vehicle, and enhances the protection performance of the battery.

The beneficial effects of the utility model are: (1) compared with the traditional automobile body rear floor which is formed by punching a large amount of steel, the automobile body rear floor changes part of parts into aluminum alloy die castings, and can effectively improve the light weight effect of the automobile body. (2) The right back longeron die casting and the left back longeron die casting are aluminum alloy die casting, have reduced required multiple welding jig, examine utensil and the mould of traditional panel beating back longeron welding assembly, have reduced process flow. (3) The precision and the collision-resistant safety of the whole new energy automobile are improved. (4) Low energy consumption, green process, no smoke, steam and spark.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the backside structure of the present invention;

in the figure: the rear floor comprises a right rear longitudinal beam die casting 1, a rear floor first cross beam 2, a rear floor panel I3, a rear floor second cross beam 4, a rear floor panel II 5, a right rear wheel cover inner plate assembly 6, a rear floor third cross beam 7, a rear row seat mounting plate 8, a rear floor fourth cross beam 9, a rear floor rear panel 10, a right rear collision energy absorption box 11, a right rear floor rear extension plate 12, a left rear floor rear extension plate 13, a left rear collision energy absorption box 14, a left rear wheel cover inner plate assembly 15, a left rear longitudinal beam die casting 16, screws 17, lock rivets 18, welding structure glue 19, a battery rear mounting bracket assembly 20 and a trunk groove reinforcing beam 21.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments.

Example 1:

as shown in fig. 1, in the rear floor assembly structure of a new energy automobile, a left rear longitudinal beam die casting 16 is positioned at the left rear side of an automobile body, a left rear wheel cover inner plate assembly 15 is fixedly connected above the left rear longitudinal beam die casting by an FDS circulation screw, and a left rear floor rear extension plate 13 and a left rear crash box 14 are fixedly connected behind the left rear longitudinal beam die casting by the FDS circulation screw; the right rear longitudinal beam die casting 1 is positioned on the right rear side of the vehicle body, the upper part of the right rear longitudinal beam die casting is fixedly connected with a right rear wheel cover inner plate assembly 6 through FDS (fully drawn yarn) circulating screws, and the rear part of the right rear longitudinal beam die casting is fixedly connected with a right rear floor rear extension plate 12 and a right rear collision energy absorption box 11 through FDS circulating screws.

A plurality of horizontal flat plate type parts are fixedly connected between the left rear longitudinal beam die casting 16 and the right rear longitudinal beam die casting 1 through FDS circulation screws, and the flat plate type parts comprise: the rear floor comprises a first rear floor beam 2, a first rear floor panel I3, a second rear floor beam 4, a second rear floor panel II 5, a third rear floor beam 7, a rear row seat mounting plate 8, a fourth rear floor beam 9 and a rear floor rear panel 10.

The first cross beam 2 of the rear floor of the flat plate part, the first cross beam 3 of the rear floor panel, the second cross beam 4 of the rear floor, the second cross beam 5 of the rear floor panel, the third cross beam 7 of the rear floor, the mounting plate 8 of the rear row of seats, the fourth cross beam 9 of the rear floor and the rear panel 10 of the rear floor are fixedly connected through SPR locking and riveting. The trunk luggage groove area is arranged above the rear floor rear panel 10, and the left side and the right side of the rear floor rear panel 10 are fixedly connected with a left rear collision energy absorption box 14, a left rear floor rear extension plate 13, a right rear collision energy absorption box 11 and a right rear floor rear extension plate 12.

As shown in fig. 2, in the rear floor assembly structure of the new energy automobile, as seen from a back view, a steel trunk slot reinforcing beam 21 is fixedly connected below the rear panel 10 of the rear floor for reinforcing the load-bearing strength of the trunk slot.

Claims

1. The rear floor assembly structure of the new energy automobile is characterized by comprising a left rear longitudinal beam die casting (16) on the left side of an automobile body, a right rear longitudinal beam die casting (1) on the right side of the automobile body, a screw for replacing a welded connection cavity area and a lock rivet for replacing a welded connection flat plate area; the left rear longitudinal beam die casting (16) and the right rear longitudinal beam die casting (1) are both aluminum alloy die castings.

2. The rear floor assembly structure of the new energy automobile as claimed in claim 1, wherein a welding structure glue is provided at the screw joint, and a welding structure glue is provided at the lock rivet joint.

3. The rear floor assembly structure of the new energy automobile as claimed in claim 1 or 2, wherein the left rear side rail die casting (16) and the right rear side rail die casting (1) are internally provided with a plurality of cavities, and the left rear side rail die casting (16) and the right rear side rail die casting (1) are fixedly connected with the rear floor first cross beam (2), the rear floor second cross beam (4), the rear floor third cross beam (7), the rear floor fourth cross beam (9), the left rear crash box (14) and the left rear wheel cover inner panel assembly (15) through screws.

4. The rear floor assembly structure of the new energy automobile as claimed in claim 3, wherein the rear floor assembly structure further comprises a rear floor panel I (3), a rear floor panel II (5), a rear row seat mounting plate (8) and a rear floor rear panel (10); the rear floor panel I (3), the rear floor panel II (5), the rear row seat mounting plate (8) and the rear floor rear panel (10) are flat areas, and are fixedly connected by locking and riveting, wherein the rear floor first cross beam (2), the rear floor second cross beam (4), the rear floor third cross beam (7) and the rear floor fourth cross beam (9) are flat areas.

5. The rear floor assembly structure of the new energy automobile as claimed in claim 4, wherein a trunk groove reinforcement beam (21) is provided under the rear floor rear panel (10).

6. The rear floor assembly structure of the new energy automobile as claimed in claim 5, further comprising a right rear crash box (11), a right rear floor rear extension plate (12), a left rear floor rear extension plate (13), and a battery rear mounting bracket assembly (20), wherein the left rear longitudinal beam die casting (16), the right rear longitudinal beam die casting (1), the rear floor first cross beam (2), the rear floor second cross beam (4), the rear floor third cross beam (7), the rear floor fourth cross beam (9), the right rear crash box (11), and the left rear crash box (14) are all aluminum alloy extruded sections; the rear floor panel I (3) and the rear floor panel II (5) are both aluminum plates; the rear row seat mounting plate (8), the rear floor rear panel (10), the rear right rear floor extension plate (12), the rear left rear floor extension plate (13), the battery rear mounting bracket assembly (20) and the trunk groove reinforcing beam (21) are all made of steel plates.

7. The rear floor assembly structure of the new energy automobile as claimed in claim 3, wherein the battery rear mounting bracket assembly (20) is mounted on the first rear floor cross member (2), and the battery rear mounting bracket assembly (20) is made of steel and is fixedly connected to the first rear floor cross member (2) by screws.