CN107985422B - Lower body structure of pure electric vehicle - Google Patents
Lower body structure of pure electric vehicle Download PDFInfo
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- CN107985422B CN107985422B CN201711307016.7A CN201711307016A CN107985422B CN 107985422 B CN107985422 B CN 107985422B CN 201711307016 A CN201711307016 A CN 201711307016A CN 107985422 B CN107985422 B CN 107985422B
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- 238000005452 bending Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention relates to a lower vehicle body structure of a pure electric vehicle, and belongs to the technical field of vehicle design and manufacture. The lower body structure of the pure electric vehicle comprises a front floor, a rear floor, a front longitudinal beam, a side beam connecting plate and a side beam of a vehicle body threshold, wherein the side beam of the vehicle body threshold is arranged on two sides of the front floor, and the side beam connecting plate is arranged on two sides of the front end of the lower body structure and is connected with the front longitudinal beam and the side beam of the vehicle body threshold; the front floor is characterized by further comprising a front floor front extension beam, wherein two sides of the front floor front extension beam are welded on the front end of the front longitudinal beam, the upper part of the front floor front extension beam is welded on the front end of the front floor, and the front longitudinal beam is bent downwards towards the outer side of a vehicle body and is connected to a vehicle body threshold boundary beam in a bending and extending way. The vehicle body structure can furthest enlarge the space of the power battery, enlarge the capacity of the power battery, effectively disperse the load no matter in front collision or side collision, avoid the stress concentration of the lower vehicle body beam frame and improve the fatigue failure resistance of the vehicle body.
Description
Technical Field
The invention relates to the technical field of automobile design and manufacture, in particular to a lower body structure of a pure electric automobile.
Background
In order to ensure collision performance and good body rigidity and mode of the automobile, as shown in fig. 1, the prior art has a structure in which a plurality of cross members 1,2 and longitudinal members 3,4, 5 from front to rear are provided on both sides of a lower portion of a floor of the automobile. The multi-longitudinal beam and cross beam structure forms a plurality of continuous force transmission structures, and can ensure that a vehicle body has good collision performance and good rigidity and mode. In a pure electric vehicle, in order to meet the requirement of good endurance mileage, the power battery needs to have enough electric quantity, so that the length, width and height of the power battery are large. In order to meet the ground clearance of an automobile, the battery support is scratched, the safety of the power battery is ensured, and the arrangement height of the power battery is required to be higher. Such an arrangement can cause the power cells to interfere with the stringers and cross-beams of the floor underbody. It is necessary to cut out the stringers of the underfloor and to delete the cross-beams of the underfloor. In order to avoid the power battery, the longitudinal beam and the cross beam structures at the lower part of the floor are required to be deleted, the structure can lead to no continuous force transmission structure of the vehicle body, the collision performance of the vehicle body and the rigidity of the vehicle body are poor, and the performance of the vehicle is reduced, so that a new lower vehicle body structure is required to be provided, not only can the good performance of the vehicle body be met, but also the installation requirement of the battery for power can be met.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide a lower body structure of a pure electric vehicle.
The utility model provides a pure electric vehicles's lower body structure, includes preceding floor, back floor, front longitudinal beam, boundary beam connecting plate and automobile body threshold boundary beam, the automobile body threshold boundary beam sets up the both sides of preceding floor, boundary beam connecting plate set up in the front end both sides of lower body structure and be connected its characterized in that with front longitudinal beam and automobile body threshold boundary beam respectively: the front floor is characterized by further comprising a front floor front extension beam, wherein two sides of the front floor front extension beam are welded on the front end of the front longitudinal beam, the upper part of the front floor front extension beam is welded on the front end of the front floor, and the front longitudinal beam is bent and extended downwards towards the outer side of a vehicle body and is connected to the side beam of the vehicle body threshold.
The front longitudinal beam, the side beams of the car body threshold and the side beam connecting plates are symmetrically arranged on two sides of the front floor.
Wherein, the lower surfaces of the front floor and the rear floor are provided with annular closed convex rib structures.
The front floor comprises a front floor body and is characterized in that a front seat front cross beam and a front seat rear cross beam are arranged on the upper surface of the front floor body, and two sides of the front seat front cross beam and two sides of the front seat rear cross beam are welded on a side beam of a vehicle body threshold.
The lower surface of the rear floor is provided with a rear floor front beam, the front end of the upper surface of the rear floor is provided with a rear seat front beam, and the rear floor front beam and the rear seat front beam are welded to form a closed section.
The lower surface of the rear floor is also provided with a rear floor second cross beam, the two sides of the rear floor are provided with rear longitudinal beams, and the two sides of the second cross beam are welded on the rear longitudinal beams.
The lower body structure of the pure electric vehicle has the following beneficial effects:
1. The vehicle body structure can furthest enlarge the space of the power battery, enlarge the capacity of the power battery and improve the endurance mileage of the vehicle.
2. The automobile body has good rigidity and mode, so that the automobile body has good collision performance, and the operation stability of the automobile can be improved.
3. The load can be effectively dispersed no matter in front collision or side collision, so that the stress concentration of the lower vehicle body beam frame is avoided, and the fatigue failure resistance of the vehicle body is improved.
Drawings
Fig. 1 is a schematic structural view of a lower body structure of a prior art pure electric vehicle.
Fig. 2 is a schematic structural view (rear surface) of the lower body structure of the pure electric vehicle of embodiment 1.
Fig. 3 is a schematic structural view (front face) of the lower body structure of the pure electric vehicle of embodiment 1.
Fig. 4 is a schematic cross-sectional view of fig. 3 along A-A.
Fig. 5 is a schematic cross-sectional structure along the direction B-B of fig. 3.
Fig. 6 is a schematic diagram of the transmission path of force at the time of a positive collision.
Fig. 7 is a schematic diagram of a transmission path of force at the time of a side collision.
The meanings indicated by the reference numerals in the drawings are respectively: 11-boundary beam connecting plates, 12-front floor front extension beams, 13-front longitudinal beams, 14-vehicle body threshold boundary beams, 15-front floors, 16-rear floor front cross beams, 17-rear longitudinal beams, 18-rear floor second cross beams, 19-rear floors, 20-front seat front cross beams, 21-front seat rear cross beams and 22-rear seat front cross beams.
Detailed Description
The following description will further explain the lower body structure of the pure electric vehicle in conjunction with specific embodiments to help those skilled in the art to understand the inventive concept, technical solution of the present invention more completely, accurately and deeply.
Example 1
As shown in fig. 2 to 5, the lower body structure of the pure electric vehicle of the present embodiment includes a front floor 15, a rear floor 19, a front side member 13, a side member connection plate 11, and a side sill 14. The front side members 13, the rocker side members 14, and the side sill connecting plates 11 are symmetrically disposed on both sides of the front floor panel 15. The rocker connecting plates 11 are provided on both sides of the front end of the lower body structure and welded to the front side members 13 and the rocker side members 14, respectively. The lower body structure of the present embodiment newly adds a front floor front extension beam 12, the front floor front extension beam 12 penetrating the front side member 13 and having both sides welded to the front end of the front side member 13, the upper portion of the front floor front extension beam 12 being welded to the front end of the front floor 15, whereas the front side member 13 is designed to extend to curve downward toward the vehicle body outside and to be connected to the body sill side member 14 in the present embodiment. The modified front longitudinal beam structure can occupy less space below the floor, can enlarge the space of the power battery, can have good force transmission effect, and can transmit collision force to the side beams. The transmission mode disperses the load and can ensure the collision safety. The lower surfaces of the front and rear floors are provided with annular closed bead structures, which increase the rigidity of the floors, while the power cells 31 are assembled under the front and rear floors 15 and 19 and ensure an assembly gap of at least 10mm with the front and rear floors. The front floor 15 is provided on its upper surface with a front seat front cross member 20 and a front seat rear cross member 21, both sides of the front seat front cross member 20 and the front seat rear cross member 21 are welded to the side sill 14 and form a continuous cross section with the upper surface of the front floor 15. The lower surface of the rear floor 19 is provided with a rear floor front cross beam 16, the front end of the upper surface of the rear floor is provided with a rear seat front cross beam 22, and the rear floor front cross beam 16 and the rear seat front cross beam 22 are welded to form a closed section, so that the transverse connection of the lap joint position of the front floor and the rear floor is enhanced, the threshold side beam and the rear longitudinal beam are better connected, and the stress concentration of the position is avoided. The lower surface of the rear floor is also provided with a rear floor second cross beam 18, the two sides of the rear floor are provided with rear longitudinal beams 17, and the two sides of the second cross beam 18 are welded on the rear longitudinal beams 17. In the case of a side collision, a plurality of transmission paths are provided to transmit to the other side, and the load is dispersed, thereby ensuring the safety of the occupant.
As shown in fig. 6, in the event of a frontal collision, the collision force by the front side member can be transmitted to the rocker 14 through the rocker connecting plate 11 and the rear section of the front side member 13, and further transmitted to the other side through the newly added front floor front extension beam 12. The transmission mode disperses the load and can ensure the collision safety. As shown in fig. 7, in the case of a side collision, a plurality of transmission paths are provided to transmit to the other side, and the load is dispersed, thereby ensuring the safety of the occupant. The side collision force transmission path I is transmitted to the other side through the side sill connecting plate 11; the path II is transmitted by a front seat front cross beam 20 which is arranged on the upper part of the floor and has a larger cross section and penetrates through the left side beam and the right side beam; path III is transmitted through the front seat rear cross member 21 at the upper part of the floor; path IV is a closed cross-section beam formed by the rear floor first cross-member 16 and the rear seat front cross-member 22. Path V is transmitted by adding a rear floor second cross member 18 at the rear of the power cell. A plurality of stable closed frame structures are formed by properly enlarging the threshold side beam and a plurality of beam structures, so that the load of the vehicle body can be dispersed, and the local stress of the vehicle body is reduced. The crash performance of the vehicle body can be improved, the bending rigidity and the torsional rigidity of the vehicle body can be improved, and the mode of the vehicle body can be improved.
It will be apparent to those skilled in the art that the present invention has been described in detail by way of illustration only, and it is not intended to be limited by the above-described embodiments, as long as various insubstantial modifications of the method concepts and aspects of the invention are employed or the inventive concepts and aspects of the invention are directly applied to other applications without modification, all within the scope of the invention.
Claims (3)
1. The utility model provides a pure electric vehicles's lower body structure, includes preceding floor, back floor, front longitudinal beam, boundary beam connecting plate and automobile body threshold boundary beam, the automobile body threshold boundary beam sets up the both sides of preceding floor, boundary beam connecting plate set up in the front end both sides of lower body structure and be connected its characterized in that with front longitudinal beam and automobile body threshold boundary beam respectively: the front floor front extension beam penetrates through the front longitudinal beam, two sides of the front floor front extension beam are welded on the front end of the front longitudinal beam, the upper part of the front floor front extension beam is welded on the front end of the front floor, and the front longitudinal beam extends downwards and bends towards the outer side of a vehicle body and is connected to the side sill of the vehicle body; the front longitudinal beam, the side beams of the car body threshold and the side beam connecting plates are symmetrically arranged on two sides of the front floor; a rear floor front beam is arranged on the lower surface of the rear floor, a rear seat front beam is arranged at the front end of the upper surface of the rear floor, and the rear floor front beam and the rear seat front beam are welded to form a closed section; the lower surface of the rear floor is also provided with a rear floor second cross beam, the two sides of the rear floor are provided with rear longitudinal beams, and the two sides of the second cross beam are welded on the rear longitudinal beams.
2. The lower body structure of a pure electric vehicle according to claim 1, characterized in that: annular closed convex rib structures are arranged on the lower surfaces of the front floor and the rear floor.
3. The lower body structure of a pure electric vehicle according to claim 1, characterized in that: the front floor is characterized in that a front seat front beam and a front seat rear beam are arranged on the upper surface of the front floor, and two sides of the front seat front beam and two sides of the front seat rear beam are welded on a vehicle body threshold side beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307016.7A CN107985422B (en) | 2017-12-08 | 2017-12-08 | Lower body structure of pure electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307016.7A CN107985422B (en) | 2017-12-08 | 2017-12-08 | Lower body structure of pure electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN107985422A CN107985422A (en) | 2018-05-04 |
| CN107985422B true CN107985422B (en) | 2024-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711307016.7A Active CN107985422B (en) | 2017-12-08 | 2017-12-08 | Lower body structure of pure electric vehicle |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108790760A (en) * | 2018-05-16 | 2018-11-13 | 浙江零跑科技有限公司 | A kind of Battery pack installation structure of electric vehicle |
| CN109204574B (en) * | 2018-10-16 | 2024-07-12 | 广州汽车集团股份有限公司 | New energy automobile body structure |
| JP7185847B2 (en) * | 2019-02-22 | 2022-12-08 | スズキ株式会社 | vehicle undercarriage |
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| CN104648480A (en) * | 2015-02-09 | 2015-05-27 | 浙江吉利控股集团有限公司 | Lower automobile body structure of electric automobile |
| CN207712163U (en) * | 2017-12-08 | 2018-08-10 | 阿尔特汽车技术股份有限公司 | The body structure of getting off of pure electric automobile |
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| KR100462682B1 (en) * | 2002-09-17 | 2004-12-20 | 현대자동차주식회사 | Floor reinforcement structure of Recreational Vehicle |
| CN101117135B (en) * | 2006-07-31 | 2012-09-05 | 比亚迪股份有限公司 | Electric automobile frame |
| CN201165250Y (en) * | 2007-11-12 | 2008-12-17 | 奇瑞汽车股份有限公司 | The lower frame structure of the car body |
| CN202783433U (en) * | 2012-08-16 | 2013-03-13 | 东风汽车公司 | Blade electric vehicle front floor board and rear floor board frame beam structure |
| CN203332232U (en) * | 2013-04-24 | 2013-12-11 | 东风汽车公司 | Pure electric automobile floor structure |
| CN205131383U (en) * | 2015-11-05 | 2016-04-06 | 北京汽车股份有限公司 | Roof beam structure assembly and electric automobile |
| CN106143646B (en) * | 2016-07-29 | 2019-03-19 | 奇瑞新能源汽车技术有限公司 | Electric car body substructure |
| CN205930933U (en) * | 2016-08-22 | 2017-02-08 | 江苏陆地方舟新能源电动汽车有限公司 | Electric car body ground plate structure |
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- 2017-12-08 CN CN201711307016.7A patent/CN107985422B/en active Active
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|---|---|---|---|---|
| CN204037690U (en) * | 2014-04-30 | 2014-12-24 | 长城汽车股份有限公司 | Back seat front cross rail, vehicle body and automobile |
| CN204279629U (en) * | 2014-12-22 | 2015-04-22 | 郑州比克新能源汽车有限公司 | A kind of battery-driven car framed structure |
| CN104648480A (en) * | 2015-02-09 | 2015-05-27 | 浙江吉利控股集团有限公司 | Lower automobile body structure of electric automobile |
| CN207712163U (en) * | 2017-12-08 | 2018-08-10 | 阿尔特汽车技术股份有限公司 | The body structure of getting off of pure electric automobile |
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| CN107985422A (en) | 2018-05-04 |
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