CN111547136B - Front end force transmission structure of electric vehicle - Google Patents

Front end force transmission structure of electric vehicle Download PDF

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Publication number
CN111547136B
CN111547136B CN202010454137.XA CN202010454137A CN111547136B CN 111547136 B CN111547136 B CN 111547136B CN 202010454137 A CN202010454137 A CN 202010454137A CN 111547136 B CN111547136 B CN 111547136B
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China
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welded
reinforcing
front wall
inner plate
connecting part
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CN202010454137.XA
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CN111547136A (en
Inventor
黄洁
石荡赫
方永利
王立来
周海
陈洋洋
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Chongqing Jinkang Sailisi New Energy Automobile Design Institute Co Ltd
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Chongqing Jinkang Sailisi New Energy Automobile Design Institute Co Ltd
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Priority to CN202010454137.XA priority Critical patent/CN111547136B/en
Publication of CN111547136A publication Critical patent/CN111547136A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D21/00Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body

Abstract

The invention discloses a force transmission structure at the front end of an electric vehicle, which comprises a front wall beam and a front longitudinal beam connected with the front wall beam, wherein a connecting part in a closed cavity is arranged at one end, close to the front longitudinal beam, of the front wall beam; the connecting part is welded with a first reinforcing part which is in an open container structure, a bulge is formed on the connecting part after the first reinforcing part is welded on the connecting part, and the connecting part and the first reinforcing part form a tubular structure with a uniform cross section; the front longitudinal beam is welded on the connecting part. By adopting the invention, the stability of the front longitudinal beam when being impacted is enhanced; connecting portion and first reinforcement welding form the even tubular structure of a cross section for the stability of connecting portion and the continuous department of first reinforcement can be strengthened, and even tubular structure makes the front longitudinal receive the collision back, and the collision power can be evenly followed tubular structure and transmitted to all the other work pieces, strengthens front longitudinal deformation stability, reduces the deformation after the front bulkhead collision, improves the security of vehicle.

Description

Front end force transmission structure of electric vehicle
Technical Field
The invention relates to a force transmission structure, in particular to a front end force transmission structure of an electric vehicle.
Background
The front collision performance of the automobile is taken as one of the automobile safety performance evaluation indexes in all countries. In the front collision process, whether the front cabin can effectively absorb and transmit collision energy is particularly critical. If the collision energy transmitted to the dash panel is too large, the vehicle occupant is directly injured. In order to resist the impact force from the front during the frontal collision of the conventional automobile, a floor longitudinal beam is generally arranged at the lower end of a floor and is overlapped with the root of a front longitudinal beam, so that the force is transmitted to the rear part of the automobile body, and the passenger compartment is protected.
Because pure electric vehicles's special construction, the power battery needs to be installed to the floor lower extreme, because the space is limited, the floor lower extreme is difficult for arranging floor biography power longeron, causes the root intensity of front longitudinal to be weak, and the collision effort can not effectively be transmitted, causes preceding enclose to invade seriously, and this collision security performance to the vehicle influences greatly.
Disclosure of Invention
The invention aims to: the problem of enclose the serious invasion before leading to is weak to electric motor car front longitudinal root intensity among the prior art, provides an electric motor car front end biography power structure that front longitudinal root intensity is high.
In order to achieve the above purpose, the invention provides the following technical scheme:
a force transmission structure at the front end of an electric vehicle comprises a front wall cross beam and a front longitudinal beam connected with the front wall cross beam, wherein a connecting part in a closed cavity is arranged at one end, close to the front longitudinal beam, of the front wall cross beam; the connecting part is welded with a first reinforcing part which is in an open container structure, a bulge is formed on the connecting part after the first reinforcing part is welded on the connecting part, and the connecting part and the first reinforcing part form a tubular structure with a uniform cross section; the front longitudinal beam is welded on the connecting part.
According to the invention adopting the technical scheme, the front longitudinal beam is welded on the tubular connecting part, and the first reinforcing part is welded on the connecting part, so that the stability of the front longitudinal beam when the front longitudinal beam is impacted is enhanced; connecting portion and first reinforcement welding form the even tubular structure of a cross section for the stability of connecting portion and the continuous department of first reinforcement can be strengthened, and even tubular structure makes the front longitudinal receive the collision back, and the collision power can be evenly followed tubular structure and transmitted to all the other work pieces, reduces the deformation after the front longitudinal collision, strengthens the stability of front longitudinal, improves the security of vehicle.
Furthermore, the tubular structure is welded on the inner plate of the A column, the inner plate reinforcing plate is welded on the inner plate of the A column and connected with the inner plate, and the inner plate of the A column and the inner plate reinforcing plate are both positioned inside the A column. The column A is internally provided with a column A inner plate and an inner plate reinforcing plate which are used as force transmission supporting pieces to enhance the stability of the column A after being stressed; and the tubular structure is welded on the inner plate of the A column, so that the collision force borne by the front longitudinal beam is conveniently transmitted to the A column.
Furthermore, one end of the A-pillar inner plate is welded and connected with a threshold inner plate, a second reinforcing piece is welded in the length direction of the threshold inner plate, and the second reinforcing piece is close to the welding position of the inner plate reinforcing plate and the threshold inner plate. The structure enables the front longitudinal beam, the A column (comprising the A column, an A column inner plate and an inner plate reinforcing plate) and the threshold inner plate to form a force transmission path; the second reinforcing piece is welded at the joint of the inner sill plate and the inner plate reinforcing plate, so that the stability of a force transmission path is enhanced.
Furthermore, the front wall cross beam is welded into a plate-shaped structure by the front wall upper cross beam and the front wall lower cross beam in parallel in the length direction; the front longitudinal beam is welded into a hollow tube shape by a front longitudinal beam inner plate and a front longitudinal beam outer plate; the front wall lower cross beam is welded with a supporting piece, and the supporting piece and the front longitudinal beam are also welded together. The support piece welds simultaneously on enclosing bottom end rail and front longitudinal for support piece forms better support to the front longitudinal, reduces the deformation behind the front longitudinal atress, strengthens the stability of front longitudinal.
Furthermore, the front longitudinal beam inner plate and the front longitudinal beam outer plate are both provided with crumple ribs. The collapse rib can deform after the front longitudinal beam is subjected to impact force, impact energy is absorbed, and deformation of the front wall beam is reduced.
Furthermore, the connecting part is a part of a third reinforcing piece, the third reinforcing piece is welded on the front wall upper cross beam, and the third reinforcing piece forms a long strip-shaped cavity structure in the length direction of the front wall upper cross beam; the front wall lower cross beam is welded with a strip-shaped fourth reinforcing piece, and the fourth reinforcing piece forms a strip-shaped cavity structure in the length direction of the front wall lower cross beam. The third reinforcing piece reinforces the structure of the front wall upper beam, and the rigidity of the front wall upper beam is enhanced; the fourth reinforcing piece reinforces the structure of the front wall lower cross beam, so that the rigidity of the front wall lower cross beam is enhanced; generally speaking, the third reinforcement and the fourth reinforcement play the effect of strengthening to the structure of enclosing the crossbeam before, have also strengthened the welding and have enclosed the stability of the front longitudinal on the crossbeam before, have reduced and have been bumped the deformation of front longitudinal rear end and preceding enclosing the crossbeam after.
Furthermore, a fifth reinforcing member is welded in a cavity structure formed by the front wall upper cross beam and the third reinforcing member, and the fifth reinforcing member is positioned at the welding connection part of the third reinforcing member and the front longitudinal beam; the fifth reinforcing piece is of a frame-shaped structure with one open end, and the open end faces the front surrounding upper cross beam. The fifth reinforcement is located the front longitudinal and encloses the welded connection department of crossbeam before with, has strengthened front longitudinal's stability, has reduced the deformation of being bumped back front longitudinal and preceding crossbeam.
Further, the connecting portion and the first stiffener each form a wedge-shaped cavity. The cross section of the wedge in one direction is approximately triangular, so that the stability of the connecting part and the first reinforcing part is improved.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: because the front longitudinal beam is welded on the tubular connecting part, and the first reinforcing part is welded on the connecting part, the stability of the front longitudinal beam when the front longitudinal beam is impacted is enhanced; connecting portion and first reinforcement welding form the even tubular structure of a cross section for the stability of connecting portion and the continuous department of first reinforcement can be strengthened, and even tubular structure makes the front longitudinal receive the collision back, and the collision power can be evenly followed tubular structure and transmitted to all the other work pieces, reduces the deformation after the front longitudinal collision, strengthens the stability of front longitudinal, improves the security of vehicle.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 shows a schematic view of a first perspective of a force transfer structure at the front end of an electric vehicle according to the invention.
Fig. 2 shows an enlarged view of the structure at a in fig. 1.
Fig. 3 is a schematic diagram showing a second view of the front end force transmission structure of the electric vehicle.
Fig. 4 shows a force transfer path schematic of fig. 3.
Fig. 5 shows a schematic diagram of a third view angle of the front end force transmission structure of the electric vehicle.
Fig. 6 shows a schematic structural view of the reinforcing member of fig. 5.
Fig. 7 shows a schematic structural view of the support member of fig. 5.
Wherein the figures include the following reference numerals:
1. a front wall beam; 11. a connecting portion; 12. the front wall is provided with an upper beam; 121. a third reinforcement; 122. a fifth reinforcing member; 13. a front wall lower beam; 131. a fourth reinforcement; 132. a sixth reinforcement;
2. a front longitudinal beam; 21. a front longitudinal inner plate; 22. a front side member outer panel;
3. a first reinforcement; 41. an inner panel reinforcement panel; 42. an A column inner plate; 5 a threshold inner plate; 6. a second reinforcement; 7. a support member; 71. a seventh stiffener; 8 dash panel.
Detailed Description
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, 2 and 5, an electric vehicle front end force transmission structure includes a front wall beam 1 and a front longitudinal beam 2 connected to the front wall beam 1, wherein a connecting portion 11 in a closed cavity is arranged at one end of the front wall beam 1 close to the front longitudinal beam 2; the connecting part 11 is welded with the first reinforcing part 3, the first reinforcing part 3 is of an open container structure, a bulge is formed on the connecting part 11 after the first reinforcing part 3 is welded on the connecting part 11, and the connecting part 11 and the first reinforcing part 3 form a tubular structure with a uniform cross section; the front side member 2 is welded to the connecting portion 11.
Preferably, the tubular structure is welded to the a-pillar inner panel 42, the a-pillar inner panel 42 is welded to the inner panel reinforcement, and both the a-pillar inner panel 42 and the inner panel reinforcement are located inside the a-pillar.
As shown in fig. 3, preferably, one end of the a-pillar inner panel 42 is welded to the rocker inner panel 5, and the second reinforcement 6 is welded to the rocker inner panel 5 in the longitudinal direction, and the second reinforcement 6 is located near the weld between the inner panel reinforcement and the rocker inner panel 5.
As shown in fig. 3, the cowl cross member 1 is preferably welded in a plate-like structure by the cowl top cross member 12 and the cowl bottom cross member 13 side by side in the longitudinal direction; the front longitudinal beam 2 is welded into a hollow tube shape by a front longitudinal beam inner plate 21 and a front longitudinal beam outer plate 22; the front wall lower cross beam 13 is welded with the supporting piece 7, and the supporting piece 7 and the front longitudinal beam 2 are also welded together.
Preferably, the crush ribs are provided on both the front side member inner panel 21 and the front side member outer panel 22.
As shown in fig. 6, preferably, the connecting portion 11 is a part of a third reinforcing member 121, the third reinforcing member 121 is welded to the front cross member 12, and the third reinforcing member 121 forms an elongated hollow structure in the length direction of the front cross member 12; the front wall lower cross beam 13 is welded with a strip-shaped fourth reinforcing member 131, and the fourth reinforcing member 131 forms a strip-shaped cavity structure in the length direction of the front wall lower cross beam 13.
Specifically, here, the third reinforcement member 121 may be a workpiece welded to the front wall upper cross member 12, or may be a protrusion formed by stamping or the like on the front wall upper cross member 12; the fourth reinforcement 132 may be a workpiece welded to the cowl cross member 13, or may be a protrusion formed by stamping or the like on the cowl cross member 13.
As shown in fig. 6, preferably, a fifth reinforcement 122 is welded in the cavity structure formed by the front cross member 12 and the third reinforcement 121, and the fifth reinforcement 122 is located at the welding connection position of the third reinforcement 121 and the front longitudinal member 2; the fifth reinforcing member 122 has a frame-shaped structure with an open end facing the front upper beam 12. As shown in fig. 6, in the present embodiment, the fifth reinforcing member 122 is a frame-shaped structure with an opening at one end, but the opening direction faces into the cavity structure, and specifically, which opening direction is adopted by the fifth reinforcing member 122 is determined according to the structural strength requirement and the space size.
Preferably, the connecting portion 11 and the first reinforcing member 3 each form a wedge-shaped cavity.
As shown in fig. 3, an a-pillar inner plate 42 is provided in the a-pillar to reinforce the strength of the a-pillar, and specifically, the a-pillar inner plate 42 is welded to the inner plate reinforcement plate 41. The A-pillar inner plate 42 is directly welded to the third reinforcement 121, the fourth reinforcement 131, and the cowl bottom cross member (13).
Fig. 4 shows several force transmission paths after the front longitudinal beam 2 is impacted:
(1) an upper front longitudinal beam force transmission path, wherein the front longitudinal beam 2 directly transmits collision force to the front surrounding upper cross beam 12;
(2) a force transmission path of the front longitudinal beam at the lower part, wherein the front longitudinal beam 2 directly transmits collision force to the front wall lower cross beam 13;
(3) the front wall force transmission path is used for transmitting the collision force to the A column by the front longitudinal beam 2 through the front wall upper cross beam 12 and the front wall lower cross beam 13;
(4) the a-pillar force transmission path transmits the collision force transmitted to the a-pillar to the rocker inner panel 5 through the inner panel reinforcement plate 41 and the a-pillar inner panel 42.
This kind of structure in many biography power route has reduced the single risk that easily appears front longitudinal (2) root in biography power route and buckles, constitutes a plurality of continuous biography power routes, reduces the invasion volume of preceding bounding wall when receiving the striking, is favorable to protecting the power battery structure of underfloor downside simultaneously.
A wedge-shaped sixth reinforcing member 132 is welded in a cavity structure formed by the front wall lower cross beam 13 and the fourth reinforcing member 131, and the sixth reinforcing member 132 is close to the welding connection part of the support member 7 and the fourth reinforcing member 131 and supports the welding position of the support member 7 on the fourth reinforcing member 131.
As shown in fig. 7, a seventh reinforcement 71 is provided in the brace 7, the seventh reinforcement 71 is shaped like a channel, both side edges of the seventh reinforcement 71 are welded to the brace 7, the brace 7 is divided into two cavities, and the seventh reinforcement 71 extends in the longitudinal direction of the front side member 2. 71 are arranged in a direction parallel to the longitudinal direction of the front side member 2.
Specifically, the front wall lower cross beam 13, the second reinforcement 6 and the doorsill inner plate 5 are welded at the end portions, so that the strength of the end portions is enhanced, and the battery pack structure at the lower end is protected.
The fourth reinforcement 131 and the sixth reinforcement 132 contribute to reinforcing the strength of the root portion of the front side member 2, contribute to smooth force transmission, and prevent the root portion of the front side member 2 from being bent.
The invention leads the front end in the front longitudinal beam 2 to generate deformation when the automobile is collided; make 2 rear ends of front longitudinal beam simultaneously to and enclose crossbeam 1 before with 2 rear end fixed connection of front longitudinal beam, enclose preceding bounding wall 8 of crossbeam 1 rear end before and reduce and warp.
As shown in fig. 5, the cowl cross member 1 is welded to the cowl panel 8.
The scope of the present invention is defined not by the above-described embodiments but by the appended claims and equivalents thereof.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (6)

1. An electric vehicle front end force transmission structure comprises a front wall beam (1) and a front longitudinal beam (2) connected with the front wall beam (1), and is characterized in that one end, close to the front longitudinal beam (2), of the front wall beam (1) is provided with a connecting part (11) in a closed cavity; the connecting part (11) is welded with a first reinforcing part (3), the first reinforcing part (3) is of an open container structure, a bulge is formed on the connecting part (11) after the first reinforcing part is welded on the connecting part (11), and the connecting part (11) and the first reinforcing part (3) form a tubular structure with a uniform cross section; the front longitudinal beam (2) is welded on the connecting part (11);
the tubular structure is welded on an A-pillar inner plate (42), the A-pillar inner plate (42) is welded and connected with an inner plate reinforcing plate, and the A-pillar inner plate (42) and the inner plate reinforcing plate are both positioned in the A-pillar;
the front wall crossbeam (1) is formed by welding a front wall upper crossbeam (12) and a front wall lower crossbeam (13) in parallel in the length direction to form a plate-shaped structure; the front longitudinal beam (2) is welded into a hollow tube shape by a front longitudinal beam inner plate (21) and a front longitudinal beam outer plate (22); the front wall lower cross beam (13) is welded with a support piece (7), and the support piece (7) and the front longitudinal beam (2) are also welded together.
2. The front end force transmission structure of the electric vehicle according to claim 1, wherein one end of the A-pillar inner plate (42) is welded and connected with a threshold inner plate (5), a second reinforcing member (6) is welded in the length direction of the threshold inner plate (5), and the second reinforcing member (6) is close to the welding position of the inner plate reinforcing plate and the threshold inner plate (5).
3. The electric vehicle front end force transmission structure according to claim 1, wherein the front side member inner plate (21) and the front side member outer plate (22) are provided with crush ribs.
4. The front force transmission structure of the electric vehicle according to claim 1, wherein the connecting part (11) is a part of a third reinforcing member (121), the third reinforcing member (121) is welded on the front wall cross member (12), and the third reinforcing member (121) forms an elongated cavity structure in the length direction of the front wall cross member (12);
the front wall lower cross beam (13) is welded with a strip-shaped fourth reinforcing piece (131), and the fourth reinforcing piece (131) forms a strip-shaped cavity structure in the length direction of the front wall lower cross beam (13).
5. The electric vehicle front end force transmission structure according to claim 4, characterized in that a fifth reinforcement (122) is welded in a cavity structure formed by the front wall upper cross beam (12) and the third reinforcement (121), wherein the fifth reinforcement (122) is located at the welding connection of the third reinforcement (121) and the front longitudinal beam (2); the fifth reinforcing member (122) is of a frame-shaped structure with one open end, and the open end faces the front upper beam (12).
6. An electric vehicle front end force transmission structure according to claim 1, characterized in that the connection portion (11) and the first reinforcement (3) each form a wedge-shaped cavity.
CN202010454137.XA 2020-05-26 2020-05-26 Front end force transmission structure of electric vehicle Active CN111547136B (en)

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CN115056855B (en) * 2022-06-27 2023-07-21 大运汽车股份有限公司 Reinforcement structure for root of longitudinal beam of cabin of electric vehicle
CN115195871B (en) * 2022-07-20 2024-01-09 岚图汽车科技有限公司 Cabin structure and vehicle before platformization

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