CN114802484B - Rear floor structure of electric automobile - Google Patents
Rear floor structure of electric automobile Download PDFInfo
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- CN114802484B CN114802484B CN202210604479.4A CN202210604479A CN114802484B CN 114802484 B CN114802484 B CN 114802484B CN 202210604479 A CN202210604479 A CN 202210604479A CN 114802484 B CN114802484 B CN 114802484B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
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Abstract
The invention relates to a rear floor structure of an electric automobile, which comprises a rear floor panel and a rear floor framework connected below the rear floor panel; the rear floor framework comprises a left rear longitudinal beam, a right rear longitudinal beam, a rear cross beam and a front cross beam which are connected between the left rear longitudinal beam and the right rear longitudinal beam; the left rear longitudinal beam and the right rear longitudinal beam are completely identical in shape and structure and are arranged in a left-right mirror symmetry mode; the front sections of the left rear longitudinal beam and the right rear longitudinal beam are lower than the rear sections, and a height difference exists in the Z direction; the positions, located on the rear wheel, of the middle portions of the left rear longitudinal beam and the right rear longitudinal beam are respectively provided with an inwards concave structure, and the device is characterized in that: and a middle cross beam is arranged between the concave structures of the left rear longitudinal beam and the right rear longitudinal beam, and the middle cross beam is close to the front cross beam. The rear suspension structure can meet the requirements of rear motor arrangement and the structure of a rear suspension at the same time, and can also meet the performance requirements of collision and CAE.
Description
Technical Field
The invention relates to an automobile body, in particular to a rear floor structure of an electric automobile.
Background
At present, the development of new energy vehicles is in the future, and pure electric vehicles are continuously recognized by people. Because many performances of the electric vehicle cannot be surpassed by the traditional fuel vehicle, for example, the acceleration performance of the electric vehicle cannot be compared with the superior fuel vehicle, and many people drive the electric vehicle and then do not use the fuel vehicle. For young people, the fuel vehicle is comfortable to pass by because of excellent acceleration and pushing feeling, and the fuel vehicle is thrown behind far when passing through a traffic light, so that the fuel vehicle is more comfortable to pass by, and the economy of the electric vehicle is more excellent in congested cities. The electric vehicle has the advantages that the rear drive obviously has advantages compared with a fuel vehicle due to the arrangement superiority, a heavy transmission shaft is not needed to transmit the power of the cabin to the rear part, and the electric vehicle can directly arrange the motor on the rear auxiliary frame.
The front suspension of the three suspensions of the rear motor of the pure electric vehicle is mounted on the front cross beam of the rear auxiliary frame, and the two suspensions behind the rear motor are mounted on the rear cross beam of the rear auxiliary frame. Because back motor arranges on the sub vehicle frame of back, what install above the back motor is seven unification controllers, lead to the back floor of electric motor car and the difference in height on preceding floor to increase, the Z of back longeron is very big to the difference in height, simultaneously because the configuration of big tire, the tire envelope is very big, inevitably leads to encroaching on back longeron Y to the space, the back longeron needs inwards dodge in wheel package department, these two aspects lead to the back longeron to be difficult and smooth to the power transmission to two dimensions Z to and Y, through moment loss verification, the performance satisfies the degree of difficulty greatly. Therefore, there is a need for improvement in the existing rear floor structure of an electric vehicle.
CN205769625U discloses a 'rear floor structure of an electric vehicle', which comprises a rear floor body, wherein the middle part of the rear floor body is provided with a reinforcing structure protruding upwards, and the top of the reinforcing structure is provided with a hand brake mounting hole; the front edge part of the rear floor body is provided with a transition profile which is formed by extending downwards flexibly, and the lower edge part of the transition profile is connected with a first cross beam of the frame; the rear floor body and the left edge part of the transition profile are both provided with a left side surface, and the lower edge of the left side surface is connected with a left longitudinal beam; the rear floor body and the right side edge part of the transition profile are both provided with a right side face, and the lower edge of the right side face is connected with a right longitudinal beam. The rigidity of the hand brake mounting point is improved, stress can be effectively transmitted to different directions, and the strength of the whole vehicle is improved.
CN202783433U discloses a 'pure electric vehicle front and rear floor framework beam structure', which comprises a front floor framework, a rear floor framework and a floor beam inner plate, wherein a front floor inner longitudinal beam is arranged at the rear end of the front floor framework, the rear end of the front floor inner longitudinal beam is connected with a front side plate of the floor beam inner plate, a power battery front fixing point is arranged on the front floor inner longitudinal beam, and a front floor edge longitudinal beam is arranged on the outer side of the front floor inner longitudinal beam; the front end of the rear floor framework is provided with a rear floor inner longitudinal beam, the front end of the rear floor inner longitudinal beam is connected with a rear side plate of the floor cross beam inner plate, and a rear fixing point of a power battery is arranged on the rear floor inner longitudinal beam; the two ends of the floor beam inner plate are respectively connected with the inner side edges of the two front floor side longitudinal beams. The rigidity is high, the automobile body performance is excellent, a power battery fixing point is provided, the strength of the battery fixing point is high, and the requirement of a seat arrangement space can be met.
The technical solutions disclosed in the above two patent documents are a useful attempt in the technical field.
Disclosure of Invention
The invention aims to provide a rear floor structure of an electric automobile, which not only can meet the requirements of rear motor arrangement and the structure of a rear suspension, but also can meet the performance requirements of collision and CAE.
The invention relates to a rear floor structure of an electric automobile, which comprises a rear floor panel and a rear floor framework connected below the rear floor panel; the rear floor framework comprises a left rear longitudinal beam, a right rear longitudinal beam, a rear cross beam and a front cross beam which are connected between the left rear longitudinal beam and the right rear longitudinal beam; the left rear longitudinal beam and the right rear longitudinal beam are completely identical in shape and structure and are arranged in a left-right mirror symmetry mode; the front sections of the left rear longitudinal beam and the right rear longitudinal beam are lower than the rear sections, and a height difference exists in the Z direction; the positions, located on the rear wheel, of the middle portions of the left rear longitudinal beam and the right rear longitudinal beam are respectively provided with an inwards concave structure, and the device is characterized in that: and a middle cross beam is arranged between the concave structures of the left rear longitudinal beam and the right rear longitudinal beam, and the middle cross beam is close to the front cross beam.
And furthermore, damping spring mounting plates are respectively arranged in the middle parts of the left rear longitudinal beam and the right rear longitudinal beam, an upper cross beam is arranged between the two damping spring mounting plates, and the upper cross beam is close to the rear cross beam.
Further, the left rear longitudinal beam and the right rear longitudinal beam are of cavity structures, a rear longitudinal beam reinforcement front section is arranged at the front part of the cavity of the left rear longitudinal beam, and a rear longitudinal beam reinforcement front section with the same shape and structure is also arranged in the cavity of the right rear longitudinal beam.
Furthermore, the cross section of the front section of the rear longitudinal beam reinforcement is in a groove shape, and flanges are arranged on two sides of the front section of the rear longitudinal beam reinforcement; the bottom of the front section of the rear longitudinal beam reinforcing piece is connected with the bottom of the left rear longitudinal beam through spot welding, and the flanges on the two sides are respectively connected with the two side surfaces of the left rear longitudinal beam through spot welding; the front end of the front section of the rear longitudinal beam reinforcing piece is fixedly connected with the front cross beam, and the rear end of the front section of the rear longitudinal beam reinforcing piece is connected with the junction of the middle cross beam and the left rear longitudinal beam through spot welding.
Furthermore, a rear longitudinal beam reinforcement rear section is arranged in the middle of the left rear longitudinal beam cavity, and a rear longitudinal beam reinforcement rear section with the same shape and structure is also arranged in the middle of the right rear longitudinal beam cavity.
Furthermore, the cross section of the rear longitudinal beam reinforcement is in a groove shape, and flanges are arranged on two sides of the rear longitudinal beam reinforcement; the bottom of the rear section of the rear longitudinal beam reinforcing piece is connected with the bottom of the left rear longitudinal beam through spot welding, and the flanges on the two sides are respectively connected with the two side surfaces of the left rear longitudinal beam through spot welding; the front part of the front section of the rear longitudinal beam reinforcement is fixedly connected with the middle cross beam, and the rear part of the rear section of the rear longitudinal beam reinforcement is fixedly connected with the rear cross beam.
Further, a rear longitudinal beam front sealing plate and a rear longitudinal beam rear sealing plate are arranged at the rear part of the left rear longitudinal beam cavity; the lower edge and two side edges of the rear longitudinal beam front sealing plate are connected with the rear section of the rear longitudinal beam reinforcing piece, the left rear longitudinal beam and the rear cross beam through spot welding; the lower edge and the two side edges of the rear longitudinal beam rear sealing plate are connected with the left rear longitudinal beam and the rear cross beam through spot welding.
Furthermore, a cross beam connecting plate is arranged at the lap joint of the front section of the rear longitudinal beam reinforcing part and the rear section of the rear longitudinal beam reinforcing part, and the cross beam connecting plate is used as a front mounting point of the rear auxiliary frame connecting part.
Furthermore, a nut pipe reinforcing plate is arranged at the lap joint position of the front section of the rear longitudinal beam reinforcing part and the rear section of the rear longitudinal beam reinforcing part in the left rear longitudinal beam cavity.
Furthermore, the rear floor panel is fixed on the rear floor framework in a screwing and welding mode.
The invention has the beneficial effects that:
on the basis of meeting the structural requirements of a rear motor and a rear suspension, under the conditions that the Z-direction height difference of a rear longitudinal beam is large, the Y-direction difference is also large and the tire envelope must be met, a middle cross beam and an upper cross beam are additionally arranged at the position where the force transmission path of the rear longitudinal beam changes suddenly, and a reinforcing structure is arranged in a cavity of the rear longitudinal beam, so that the conditions that the force transmission path of the rear longitudinal beam is not smooth and the torque loss is serious are improved, the requirements of fatigue durability and NVH performance are met, and the severe requirement of five-star rear collision is also met.
Drawings
FIG. 1 is a schematic (partial) external view of the present invention;
FIG. 2 is a schematic view of the rear floor framework of the present invention;
FIG. 3 is a schematic view of the cavity of the right rear stringer (or left rear stringer) of the rear floor frame;
fig. 4 is a bottom view of the rear floor frame of the present invention.
In the figures (reference signs refer to technical features):
1-rear floor panel, 2-left rear longitudinal beam, 3-right rear longitudinal beam, 4-rear cross beam, 5-front cross beam, 6-middle cross beam, 7-upper cross beam, 8-rear longitudinal beam reinforcement front section, 9-rear longitudinal beam reinforcement rear section, 10-rear longitudinal beam front sealing plate, 11-rear longitudinal beam rear sealing plate, 12-cross beam connecting plate, 13-nut tube reinforcing plate, 14-damping spring mounting plate and 15-rear auxiliary frame connecting piece.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
Referring to fig. 1 to 4, the rear floor structure of an electric vehicle includes a rear floor panel 1 and a rear floor skeleton connected to the lower surface of the rear floor panel; the rear floor framework comprises a left rear longitudinal beam 2, a right rear longitudinal beam 3, a rear cross beam 4 and a front cross beam 5 which are connected between the left rear longitudinal beam and the right rear longitudinal beam; the left rear longitudinal beam 2 and the right rear longitudinal beam 3 are completely identical in shape and structure and are arranged in a left-right mirror symmetry mode; the front sections of the left rear longitudinal beam 2 and the right rear longitudinal beam 3 are lower than the rear sections, and a height difference exists in the Z direction; concave structures are respectively arranged at the positions, located on the rear wheel, of the middle parts of the left rear longitudinal beam 2 and the right rear longitudinal beam 3 to meet the requirement of tire enveloping, but the concave structures occupy Y-direction spaces of the left rear longitudinal beam and the right rear longitudinal beam in an extruding manner, so that a force transmission path is suddenly changed, and the moment loss is serious; the method is characterized in that: a middle cross beam 6 is arranged between the concave structures of the left rear longitudinal beam 2 and the right rear longitudinal beam 3, and the middle cross beam 6 is close to the front cross beam 5. The arrangement of the middle cross beam effectively solves the problem of sudden change of a force transmission path and reduces the moment loss.
Damping spring mounting plates 14 are respectively arranged in the middle of the left rear longitudinal beam 2 and the right rear longitudinal beam 3, an upper cross beam 7 is arranged between the two damping spring mounting plates 14, and the upper cross beam 7 is close to the rear cross beam 4. The arrangement of the upper cross beam further improves the problem that a force transmission path is not smooth.
The left rear longitudinal beam 2 and the right rear longitudinal beam 3 are both of a cavity structure, a rear longitudinal beam reinforcement front section 8 is arranged in the front of the cavity of the left rear longitudinal beam 2, and a rear longitudinal beam reinforcement front section 8 with the same shape and structure is also arranged in the cavity of the right rear longitudinal beam 3 so as to reinforce the force transmission capacity.
The cross section of the front section 8 of the rear longitudinal beam reinforcement is in a groove shape, and flanges are arranged on two sides of the front section; the bottom of the front section 8 of the rear longitudinal beam reinforcing piece is connected with the bottom of the left rear longitudinal beam 2 through spot welding, and the flanges on the two sides are respectively connected with the two side surfaces of the left rear longitudinal beam 2 through spot welding; the front end of the front section 8 of the rear longitudinal beam reinforcement is fixedly connected with the front cross beam 5, and the rear end of the front section 8 of the rear longitudinal beam reinforcement is connected with the junction of the middle cross beam 6 and the left rear longitudinal beam 2 through spot welding, so that the front section of the rear longitudinal beam reinforcement plays a key role in connecting the front cross beam and the middle cross beam.
The middle part of the cavity of the left rear longitudinal beam 2 is provided with a rear longitudinal beam reinforcement rear section 9, and the middle part of the cavity of the right rear longitudinal beam 3 is also provided with a rear longitudinal beam reinforcement rear section 9 with the same shape and structure so as to strengthen the force transmission capacity.
The cross section of the rear section 9 of the rear longitudinal beam reinforcement is in a groove shape, and two sides of the rear longitudinal beam reinforcement are provided with flanges; the bottom of the rear longitudinal beam reinforcement rear section 9 is connected with the bottom of the left rear longitudinal beam 2 through spot welding, and the flanges on the two sides are respectively connected with the two side surfaces of the left rear longitudinal beam 2 through spot welding; the front part of the front section 8 of the rear longitudinal beam reinforcement is fixedly connected with the middle cross beam 6, and the rear part of the rear section 9 of the rear longitudinal beam reinforcement is fixedly connected with the rear cross beam 4.
A rear longitudinal beam front sealing plate 10 and a rear longitudinal beam rear sealing plate 11 are arranged at the rear part of the cavity of the left rear longitudinal beam 2; the lower edge and two side edges of the rear longitudinal beam front closing plate 10 are connected with the rear section 9 of the rear longitudinal beam reinforcing piece, the left rear longitudinal beam 2 and the rear cross beam 4 through spot welding; the lower edge and two side edges of the rear longitudinal beam rear closing plate 11 are connected with the left rear longitudinal beam 2 and the rear cross beam 4 through spot welding. To reinforce the strength of the rear portion of the right rear side member.
A cross beam connecting plate 12 is arranged at the joint of the front section 8 of the rear longitudinal beam reinforcement and the rear section 9 of the rear longitudinal beam reinforcement, and the cross beam connecting plate 12 is used as a front mounting point of a rear sub frame connecting piece 15. Not only strengthened the dynamic rigidity of the preceding mounting point of back sub vehicle frame, strengthened the joint strength with right back longeron moreover.
The lap joint part of the front section 8 of the rear longitudinal beam reinforcing part and the rear section 9 of the rear longitudinal beam reinforcing part in the cavity of the left rear longitudinal beam 2 is provided with a nut pipe reinforcing plate 13 so as to reinforce the structural strength of the key lap joint part.
The rear floor panel 1 is fixed on the rear floor frame by screwing and welding.
Claims (7)
1. A rear floor structure of an electric automobile comprises a rear floor panel (1) and a rear floor framework connected below the rear floor panel; the rear floor framework comprises a left rear longitudinal beam (2), a right rear longitudinal beam (3), a rear cross beam (4) and a front cross beam (5) which are connected between the left rear longitudinal beam and the right rear longitudinal beam; the left rear longitudinal beam (2) and the right rear longitudinal beam (3) are completely identical in shape and structure and are arranged in a left-right mirror symmetry mode; the front sections of the left rear longitudinal beam (2) and the right rear longitudinal beam (3) are lower than the rear sections, and a height difference exists in the Z direction; the middle parts of the left rear longitudinal beam (2) and the right rear longitudinal beam (3) are respectively provided with an inward concave structure at the positions of the rear wheels, and the bicycle is characterized in that: a middle cross beam (6) is arranged between the concave structures of the left rear longitudinal beam (2) and the right rear longitudinal beam (3), and the middle cross beam (6) is close to the front cross beam (5);
damping spring mounting plates (14) are respectively arranged in the middle of the left rear longitudinal beam (2) and the right rear longitudinal beam (3), an upper cross beam (7) is arranged between the two damping spring mounting plates (14), and the upper cross beam (7) is close to the rear cross beam (4);
the left rear longitudinal beam (2) and the right rear longitudinal beam (3) are both of cavity structures, a rear longitudinal beam reinforcement front section (8) is arranged at the front part of the cavity of the left rear longitudinal beam (2), and a rear longitudinal beam reinforcement front section (8) with the same shape and structure is also arranged in the cavity of the right rear longitudinal beam (3);
the middle part of the cavity of the left rear longitudinal beam (2) is provided with a rear longitudinal beam reinforcement rear section (9), and the middle part of the cavity of the right rear longitudinal beam (3) is also provided with a rear longitudinal beam reinforcement rear section (9) with the same shape and structure.
2. The rear floor structure of an electric vehicle according to claim 1, wherein: the cross section of the front section (8) of the rear longitudinal beam reinforcement is in a groove shape, and flanges are arranged on two sides of the front section; the bottom of the front section (8) of the rear longitudinal beam reinforcement is connected with the bottom of the left rear longitudinal beam (2) through spot welding, and the flanges at two sides are respectively connected with two side surfaces of the left rear longitudinal beam (2) through spot welding; the front end of the front section (8) of the rear longitudinal beam reinforcement is fixedly connected with the front cross beam (5), and the rear end of the front section (8) of the rear longitudinal beam reinforcement is connected with the junction of the middle cross beam (6) and the left rear longitudinal beam (2) through spot welding.
3. The rear floor structure of an electric vehicle according to claim 1 or 2, characterized in that: the cross section of the rear section (9) of the rear longitudinal beam reinforcement is in a groove shape, and flanges are arranged on two sides of the rear longitudinal beam reinforcement; the bottom of the rear longitudinal beam reinforcement piece rear section (9) is connected with the bottom of the left rear longitudinal beam (2) through spot welding, and the flanges on the two sides are respectively connected with the two side surfaces of the left rear longitudinal beam (2) through spot welding; the front part of the front section (8) of the rear longitudinal beam reinforcement is fixedly connected with the middle cross beam (6), and the rear part of the rear section (9) of the rear longitudinal beam reinforcement is fixedly connected with the rear cross beam (4).
4. The rear floor structure of an electric vehicle according to claim 1, characterized in that: a rear longitudinal beam front sealing plate (10) and a rear longitudinal beam rear sealing plate (11) are arranged at the rear part of the cavity of the left rear longitudinal beam (2); the lower edge and two side edges of the rear longitudinal beam front sealing plate (10) are connected with the rear section (9) of the rear longitudinal beam reinforcing piece, the left rear longitudinal beam (2) and the rear cross beam (4) through spot welding; the lower edge and two side edges of the rear longitudinal beam rear sealing plate (11) are connected with the left rear longitudinal beam (2) and the rear cross beam (4) through spot welding.
5. The rear floor structure of an electric vehicle according to claim 1, characterized in that: and a cross beam connecting plate (12) is arranged at the lap joint of the front section (8) of the rear longitudinal beam reinforcement and the rear section (9) of the rear longitudinal beam reinforcement, and the cross beam connecting plate (12) is used as a front mounting point of a rear auxiliary frame connecting piece (15).
6. The rear floor structure of an electric vehicle according to claim 1, wherein: and a nut pipe reinforcing plate (13) is arranged at the lap joint part of the front section (8) of the rear longitudinal beam reinforcing part and the rear section (9) of the rear longitudinal beam reinforcing part in the cavity of the left rear longitudinal beam (2).
7. The rear floor structure of an electric vehicle according to claim 1, characterized in that: the rear floor panel (1) is fixed on the rear floor framework in a screwing and welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210604479.4A CN114802484B (en) | 2022-05-31 | 2022-05-31 | Rear floor structure of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210604479.4A CN114802484B (en) | 2022-05-31 | 2022-05-31 | Rear floor structure of electric automobile |
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| Publication Number | Publication Date |
|---|---|
| CN114802484A CN114802484A (en) | 2022-07-29 |
| CN114802484B true CN114802484B (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210604479.4A Active CN114802484B (en) | 2022-05-31 | 2022-05-31 | Rear floor structure of electric automobile |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115535089B (en) * | 2022-09-14 | 2024-05-17 | 阿维塔科技(重庆)有限公司 | Rear floor boundary beam structure and vehicle |
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| CN114340983A (en) * | 2019-09-05 | 2022-04-12 | 安赛乐米塔尔公司 | Rear structure for electric vehicle |
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Patent Citations (10)
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| CN201347136Y (en) * | 2008-12-29 | 2009-11-18 | 重庆长安汽车股份有限公司 | Automobile rear floor framework assembly with traveling closing structure |
| CN102328700A (en) * | 2011-06-08 | 2012-01-25 | 浙江吉利汽车研究院有限公司 | Vehicle front floor strengthening structure |
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| CN114802484A (en) | 2022-07-29 |
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Address after: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee after: Deep Blue Automotive Technology Co.,Ltd. Address before: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee before: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |
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