CN105818862A - Front cabin longitudinal beam rear segment structure and automobile - Google Patents
Front cabin longitudinal beam rear segment structure and automobile Download PDFInfo
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- CN105818862A CN105818862A CN201510006631.9A CN201510006631A CN105818862A CN 105818862 A CN105818862 A CN 105818862A CN 201510006631 A CN201510006631 A CN 201510006631A CN 105818862 A CN105818862 A CN 105818862A
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Abstract
The present invention relates to a front cabin longitudinal beam rear segment structure. The front cabin longitudinal beam rear segment structure comprises a longitudinal beam rear segment, a first reinforcing plate and a second reinforcing plate; the longitudinal beam rear segment is positioned below a dash panel; the longitudinal beam rear segment and the dash panel are provided with bended areas at positions corresponding to feet of a passenger; a first cavity is formed between the longitudinal beam rear segment and the dash panel; and the first reinforcing plate and the second reinforcing plate are bridged at the bended areas in the length direction of the longitudinal beam rear segment and are superposed from bottom to top in the first cavity to divide the portion, corresponding to the bended areas, of the first cavity into a second cavity, a third cavity and a fourth cavity from bottom to top. According to the front cabin longitudinal beam rear segment structure, the first reinforcing plate and the second reinforcing plate are disposed in the longitudinal beam rear segment, a multilayer cavity structure is formed at the bended area of the longitudinal beam rear segment, so that deformation resistant capability of the longitudinal beam rear segment can be increased, the collision energy absorption effect can be improved, and the influence on passenger space can be reduced.
Description
Technical field
The present invention relates to auto Body Technology, especially with regard to a kind of front deck longeron rear section structure and automobile.
Background technology
Front deck longeron back segment is the important component part of body-in-white structure, and it is positioned at the lower section of automobile dash board, and front deck longeron back segment is provided with the bent area of corresponding occupant foot with automobile dash board.Front deck longeron back segment needs the resistance to deformation when there is head-on crash and offset collision, reduces the intrusion volume of front panel in collision process, thus protects the personal safety of driver and occupant.
Traditional vehicle, in addition to being provided with one section of reinforcing plate in the inside of front deck longeron back segment, also two pieces of reinforcing plates of position superposition of corresponding longeron back segment can be strengthened with the bending part to front panel above the front panel of vehicle body.But, owing to two pieces of reinforcing plates of superposition are only strengthened above front panel, and being limited by occupant's foot well, this two pieces reinforcing plate cannot extend to the front end of front panel.In actual collision, this structure can only resistance to deformation to a certain extent, and cannot play accept deformation with energy transmission effect, to promote collision performance effect little.Additionally, the reinforcement structure of this patch installing not only increases weight and the cost of vehicle, being disposed with of vehicle interior is necessarily affected, have impact on the placement space of occupant foot.
Summary of the invention
It is an object of the invention to provide a kind of front deck longeron rear section structure, the resistance capacity to deformation of front deck longeron back segment can be improved, improve collision energy-absorbing effect, reduce the impact on occupant space.
The present invention provides a kind of front deck longeron rear section structure, this front deck longeron rear section structure includes longeron back segment, first reinforcing plate and the second reinforcing plate, this longeron back segment is positioned at the lower section of front panel, this longeron back segment is provided with bent area with this front panel in the position of corresponding occupant foot, the first cavity is formed between this longeron back segment and this front panel, this first reinforcing plate is located at this bent area with this second reinforcing plate along the length direction of this longeron back segment and is stacked from the bottom to top in this first cavity, by this first cavity to the part of bent area being separated into the second cavity from the bottom to top, 3rd cavity and the 4th cavity.
Further, this longeron back segment has the first end and second end of corresponding chassis runner of corresponding front deck front longitudinal in the longitudinal direction, and this first reinforcing plate and this second reinforcing plate extend between this first end and this second end and be located at this bent area.
Further, this longeron back segment all takes the shape of the letter U with the section of this first reinforcing plate, and this first reinforcing plate is identical with the opening direction of this longeron back segment, and the sidewall of this first reinforcing plate forms this second cavity with the sidewall weld of this longeron back segment.
Further, the section of this second reinforcing plate takes the shape of the letter U, this second reinforcing plate is identical with the opening direction of this longeron back segment, this second reinforcing plate is equipped with the opening both sides of this longeron back segment and welds flange, the lower surface of the welding flange of this second reinforcing plate forms the 3rd cavity with the flanging welded that welds of this longeron back segment, and the upper surface of the welding flange of this second reinforcing plate welds formation the 4th cavity with the lower surface of this front panel.
Further, this first reinforcing plate is to welding with the diapire of this longeron back segment with the diapire of this second end by the first end, and this second cavity is a triangular cavity.
Further, this second reinforcing plate is to should the bottom wall layer stitch welding of the first end be connected in this first reinforcing plate on the part diapire that welds with this longeron back segment.
Further, this first reinforcing plate tilts to the direction of this first end and extends to the position of corresponding front panel crossbeam on this longeron back segment.
Further, the yield strength of the steel that the yield strength of the steel that this longeron back segment uses uses more than this first reinforcing plate, the yield strength of the steel that the yield strength of the steel that this first reinforcing plate uses uses more than this second reinforcing plate.
Further, the material thickness of this first reinforcing plate is thick more than the material of this second reinforcing plate.
The present invention also provides for a kind of automobile, and this automobile includes front deck longeron rear section structure as above.
In embodiments of the invention, longeron back segment, the first reinforcing plate, formed between the second reinforcing plate and front panel and use the steel that successively decrease of strength grade to make between multi-layer cavity structure, and longeron back segment, the first reinforcing plate and the second reinforcing plate.In collision process, longeron back segment accepts deformation and transmission energy, and the first reinforcing plate resists the deformation of longeron back segment bent area in collision process, and the second reinforcing plate is for resisting the deformation of front panel bent area further.Further, by the reasonable coordination between the transition of material rate and the transition of resistance to deformation cavity, absorption and the transmission of front deck longeron rear section structure collision energy can effectively and be consistently completed.Additionally, the front deck longeron rear section structure of the present invention is arranged in the lower section of front panel, little on the impact of occupant's foot well, thus the second reinforcing plate extends at front panel crossbeam, reach the effect mutually ganged up between the transverse passageway of front panel crossbeam and longitudinal cavity of longeron back segment, can further improve collision performance.
Accompanying drawing explanation
Fig. 1 is the front deck longeron rear section structure transverse sectional view in bent area in the embodiment of the present invention.
Fig. 2 is the longitudinal cross-section schematic diagram of front deck longeron rear section structure in the embodiment of the present invention.
Detailed description of the invention
By further illustrating the technological means and effect that the present invention taked by reaching predetermined goal of the invention, below in conjunction with accompanying drawing and preferred embodiment, detailed description of the invention, structure, feature and the effect thereof to the present invention, describe in detail as after.
Fig. 1 is the front deck longeron rear section structure transverse sectional view in bent area in the embodiment of the present invention.Fig. 2 is the longitudinal cross-section schematic diagram of front deck longeron rear section structure in the embodiment of the present invention.Incorporated by reference to Fig. 1 and Fig. 2, the front deck longeron rear section structure 10 of the present invention includes longeron back segment the 11, first reinforcing plate 12 and the second reinforcing plate 13, longeron back segment 11 has the first end 111 and second end 112 of corresponding chassis runner (not shown) of corresponding front deck front longitudinal (not shown) in the longitudinal direction, longeron back segment 11 is positioned at the lower section of front panel 21, and be connected between front deck front longitudinal and chassis runner, play in collision process in X direction to the effect of body tail power transmission.Further, the first cavity 15 is formed between longeron back segment 11 and front panel 21, first reinforcing plate 12 is stacked in the first cavity 15 from the bottom to top with the second reinforcing plate 13, longeron back segment 11 is provided with bent area 16 with front panel 21 in the position of corresponding occupant foot, first reinforcing plate 12 and the second reinforcing plate 13 extend between the first end 111 and the second end 112 and are located at bent area 16, and the part of corresponding for the first cavity 15 bent area 16 is separated into the second cavity the 152, the 3rd cavity 153 and the 4th cavity 154 from the bottom to top.
Specifically, as it is shown in figure 1, the section of longeron back segment the 11, first reinforcing plate 12 and the second reinforcing plate 13 all takes the shape of the letter U, in the present embodiment, the diapire of the second reinforcing plate 13 is additionally provided with the strengthening groove 131 that the side of dash panel 21 is protruding.First reinforcing plate 12 is identical with the opening direction of longeron back segment 11, and the sidewall of the first reinforcing plate 12 and the sidewall weld of longeron back segment 11, so that forming the second cavity 152 between the first reinforcing plate 12 and longeron back segment 11.Second reinforcing plate 13 is identical with the opening direction of longeron back segment 11, second reinforcing plate 13 is equipped with the opening both sides of longeron back segment 11 and welds flange, the lower surface of welding flange of the second reinforcing plate 13 welds with the upper surface welding flange of longeron back segment 11, so that forming the 3rd cavity 153 between the second reinforcing plate 13 and the first reinforcing plate 12, the upper surface of the welding flange of the second reinforcing plate 13 welds with the lower surface of front panel 21, so that the second reinforcing plate 13 forms the 4th cavity 154 with front panel 21.
Further, as shown in Figure 2, first reinforcing plate 12 is located at the bent area of longeron back segment 11, the diapire of corresponding first end 111 of the first reinforcing plate 12 and the second end 112 diapire with longeron back segment 11 respectively welds, so that the second cavity 152 becomes a triangular cavity, the intensity of bending place bottom longeron back segment 11 can be effectively improved.Second reinforcing plate 13 is positioned at the top of the first reinforcing plate 12 and is located at the bent area of longeron back segment 11, and the bottom wall layer stitch welding of corresponding first end 111 of the second reinforcing plate 12 is connected in the first reinforcing plate 12 on the upper surface of part diapire that welds with longeron back segment 11.So, the second cavity 152 is collectively forming the cavity (cavity formed between the i.e. second reinforcing plate 13 and longeron back segment 11) of a similar triangle with the 3rd cavity 153, can further improve longeron back segment 11 and the front panel 21 intensity in bending place.
In the present invention, the part of the first corresponding bent area of cavity 15 16 is separated into the cavity structure of multilamellar resistance to deformation by the first reinforcing plate 12 and the second reinforcing plate 13, the cavity structure of these resistance to deformations includes: the resistance to deformation cavity that the bending place of the first reinforcing plate 12 and longeron back segment 11 is formed, the i.e. second cavity 152；The resistance to deformation cavity that the bending place of the second reinforcing plate 13 and longeron back segment 11 is formed, the i.e. second cavity 152 and combination of the 3rd cavity 153；The resistance to deformation cavity formed between second reinforcing plate 13 and the first reinforcing plate 12, the i.e. the 3rd cavity 153；The resistance to deformation cavity formed between front panel 21 and the second reinforcing plate 13, i.e. the 4th cavity 154, these resistance to deformation cavitys focus primarily upon at bent area 16, by the transition successively of these resistance to deformation cavitys, be conducive to improving crash energy absorption and the effectiveness of transmission and continuity, improve the non-deformability of longeron back segment 11.
Further, first reinforcing plate 12 is after the corresponding diapire of the first end 111 welds with the diapire of longeron back segment 11, tilt and extend to position corresponding with front panel crossbeam 23 on longeron back segment 11 to the direction of the first end 111, make the 4th cavity 154 extend forwardly at front panel crossbeam 23.As shown in Figure 2, front panel crossbeam 23 is the U-shaped crossbeam being arranged on front panel 21 front end, the 5th cavity 17 is formed between itself and front panel 21, so, it is interconnected between transverse passageway (the 5th cavity 17) and longitudinal cavity (the 4th cavity 154) of longeron back segment 11 of front panel crossbeam 23, in collision process, front longitudinal (length direction) crumple in X direction, the first reinforcing plate 12 is made to prop up front panel crossbeam 23 when deformation, make transverse passageway and longitudinal common resistance to deformation of cavity, can further improve the non-deformability of longeron back segment 11.Additionally, in the present embodiment, the second reinforcing plate 13 extends to the front of front-row seats crossbeam 24 and terminates to the direction of the second end 112, i.e. the length of the second reinforcing plate 13 is less than the distance between the first end 111 and the front-row seats crossbeam 24 of longeron back segment 11.So, while ensureing the non-deformability of longeron back segment 11, tare can also be alleviated.
Further, in the present embodiment, the yield strength of the steel that the yield strength of the steel that longeron back segment 11 uses uses more than the first reinforcing plate 12, the yield strength of the steel that the yield strength of the steel that the first reinforcing plate 12 uses uses more than the second reinforcing plate 13, the material thickness of the first reinforcing plate 12 is thick more than the material of the second reinforcing plate 13.Specifically, in the present embodiment, the steel that first reinforcing plate 12 uses model to be HC420/780DP, its yield strength is not less than 420MPa, the steel that second reinforcing plate 13 uses model to be HC340/590DP, its yield strength is 340～440MPa, on this basis, longeron back segment 11 can use yield strength to be higher than the first reinforcing plate 12 and steel of the second reinforcing plate 13, the high-yield strength steel such as manufactured by thermoforming process, so that forming the relation being incremented by successively of yield strength between second reinforcing plate the 13, first reinforcing plate 12, longeron back segment 11.Second reinforcing plate the 13, first reinforcing plate 12, longeron back segment 11 use the steel that yield strength is incremented by, coordinate the transition successively of resistance to deformation cavity between the second cavity the 152, the 3rd cavity the 153, the 4th cavity 154 again, the non-deformability of front deck longeron back segment can be effectively improved, make the effectively coherent absorption completing collision energy and the transmission of front deck longeron back segment.Additionally, the strength of materials and the reasonably combined of thickness also can effectively reduce cost and tare.
The present invention also provides for a kind of automobile, and this automobile includes front deck longeron rear section structure 10 as above.It should be noted that, owing to the present invention is by the reasonable coordination between transition and the transition of resistance to deformation cavity of material rate, the collision energy-absorbing effect of longeron back segment can be given full play to, it is greatly improved the non-deformability of longeron back segment, therefore, the front deck longeron rear section structure of the present invention can not only meet the application requirement of existing A level car, can meet application requirement too on B level car (in-between car), C level car (medium-and-large-sized car).
To sum up, the front deck longeron rear section structure of the present invention has the advantages that
1. the cavity of longeron back segment Yu front panel bent area is separated into multi-layer cavity structure by the first reinforcing plate and the second reinforcing plate, in collision process, longeron back segment accepts deformation and transmission energy, first reinforcing plate resists the deformation in longeron back segment bending region in collision process, second reinforcing plate can be used for resisting further the deformation in front panel bending region, the transition successively of resistance to deformation cavity, is effectively improved the non-deformability of longeron back segment, thus improves the head-on crash of vehicle body and the performance of offset collision；
2. the first reinforcing plate, the diapire of the second reinforcing plate are connected together with the bottom wall layer stitch welding of longeron back segment, the first reinforcing plate, the second reinforcing plate is made to form triangular cavity with longeron back segment bent area respectively, be conducive to power transmission and improve the rigidity of longeron back segment, can further improve the non-deformability of longeron back segment bent area；
3. the steel using strength grade to be incremented by between the second reinforcing plate, the first reinforcing plate and longeron back segment are made, by the reasonable coordination between transition and the transition of resistance to deformation cavity of material rate, front deck longeron rear section structure can be made effectively and consistently to complete absorption and the transmission of collision energy, reduce the intrusion volume of front panel in collision process, reduce occupant injury value；
4. the front deck longeron rear section structure of the present invention is arranged in the lower section of front panel, little on the impact of occupant's foot well, thus the first reinforcing plate extends at front panel crossbeam, reach the effect being interconnected between the transverse passageway of front panel crossbeam and longitudinal cavity of longeron back segment, can further improve collision performance；
5. just terminate before second reinforcing plate of the present invention extends to seat beam, tare can be reduced.
The above, it it is only presently preferred embodiments of the present invention, not the present invention is made any pro forma restriction, although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, any those skilled in the art, in the range of without departing from technical solution of the present invention, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is without departing from technical solution of the present invention content, any simple modification above example made according to the technical spirit of the present invention, equivalent variations and modification, all still fall within the range of technical solution of the present invention.
Claims (10)
1. a front deck longeron rear section structure, it is characterized in that: this front deck longeron rear section structure includes longeron back segment, first reinforcing plate and the second reinforcing plate, this longeron back segment is positioned at the lower section of front panel, this longeron back segment is provided with bent area with this front panel in the position of corresponding occupant foot, the first cavity is formed between this longeron back segment and this front panel, this first reinforcing plate is located at this bent area with this second reinforcing plate along the length direction of this longeron back segment and is stacked from the bottom to top in this first cavity, by this first cavity to the part of bent area being separated into the second cavity from the bottom to top, 3rd cavity and the 4th cavity.
2. front deck longeron rear section structure as claimed in claim 1, it is characterized in that: this longeron back segment has the first end and second end of corresponding chassis runner of corresponding front deck front longitudinal in the longitudinal direction, and this first reinforcing plate and this second reinforcing plate extend between this first end and this second end and be located at this bent area.
3. front deck longeron rear section structure as claimed in claim 2, it is characterized in that: this longeron back segment all takes the shape of the letter U with the section of this first reinforcing plate, this first reinforcing plate is identical with the opening direction of this longeron back segment, and the sidewall of this first reinforcing plate forms this second cavity with the sidewall weld of this longeron back segment.
4. front deck longeron rear section structure as claimed in claim 3, it is characterized in that: the section of this second reinforcing plate takes the shape of the letter U, this second reinforcing plate is identical with the opening direction of this longeron back segment, this second reinforcing plate is equipped with the opening both sides of this longeron back segment and welds flange, the lower surface of the welding flange of this second reinforcing plate forms the 3rd cavity with the flanging welded that welds of this longeron back segment, and the upper surface of the welding flange of this second reinforcing plate welds formation the 4th cavity with the lower surface of this front panel.
5. front deck longeron rear section structure as claimed in claim 2, it is characterised in that: this first reinforcing plate is to welding with the diapire of this longeron back segment with the diapire of this second end by the first end, and this second cavity is a triangular cavity.
6. front deck longeron rear section structure as claimed in claim 5, it is characterised in that: this second reinforcing plate is to should the bottom wall layer stitch welding of the first end be connected in this first reinforcing plate on the part diapire that welds with this longeron back segment.
7. front deck longeron rear section structure as claimed in claim 5, it is characterised in that: this first reinforcing plate tilts to the direction of this first end and extends to the position of corresponding front panel crossbeam on this longeron back segment.
8. front deck longeron rear section structure as claimed in claim 1, it is characterized in that: the yield strength of the steel that the yield strength of the steel that this longeron back segment uses uses more than this first reinforcing plate, the yield strength of the steel that the yield strength of the steel that this first reinforcing plate uses uses more than this second reinforcing plate.
9. front deck longeron rear section structure as claimed in claim 1, it is characterised in that: the material thickness of this first reinforcing plate is thick more than the material of this second reinforcing plate.
10. an automobile, it is characterised in that: this automobile includes front deck longeron rear section structure as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510006631.9A CN105818862B (en) | 2015-01-05 | 2015-01-05 | Front deck longeron rear section structure and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510006631.9A CN105818862B (en) | 2015-01-05 | 2015-01-05 | Front deck longeron rear section structure and automobile |
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| Publication Number | Publication Date |
|---|---|
| CN105818862A true CN105818862A (en) | 2016-08-03 |
| CN105818862B CN105818862B (en) | 2018-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510006631.9A Active CN105818862B (en) | 2015-01-05 | 2015-01-05 | Front deck longeron rear section structure and automobile |
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| Country | Link |
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| CN (1) | CN105818862B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109204512A (en) * | 2017-06-29 | 2019-01-15 | 本田技研工业(中国)投资有限公司 | The reinforcement structure at front longitudinal beam rear portion |
| CN110588784A (en) * | 2019-09-28 | 2019-12-20 | 浙江飞碟汽车制造有限公司 | Automobile longitudinal beam structure and manufacturing method thereof |
| CN111516757A (en) * | 2020-04-10 | 2020-08-11 | 东风柳州汽车有限公司 | Longeron structure and car |
| CN112537370A (en) * | 2020-12-10 | 2021-03-23 | 奇瑞新能源汽车股份有限公司 | Vehicle front longitudinal beam assembly and vehicle |
| CN114802449A (en) * | 2022-03-25 | 2022-07-29 | 东风汽车集团股份有限公司 | Automobile longitudinal beam group front section |
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| CN1506248A (en) * | 2002-12-12 | 2004-06-23 | 现代自动车株式会社 | Reinforcing structure for rear part of vehicle front longitudinal-member |
| CN202029898U (en) * | 2010-11-24 | 2011-11-09 | 浙江吉利汽车研究院有限公司 | Connecting structure for engine cabin assembly and front floor assembly |
| CN203739992U (en) * | 2014-02-24 | 2014-07-30 | 奇瑞汽车股份有限公司 | Front longitudinal girder rear structure for automobile |
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| JP2001301656A (en) * | 2000-04-25 | 2001-10-31 | Nissan Motor Co Ltd | Body structure for automobile |
| CN1506248A (en) * | 2002-12-12 | 2004-06-23 | 现代自动车株式会社 | Reinforcing structure for rear part of vehicle front longitudinal-member |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109204512A (en) * | 2017-06-29 | 2019-01-15 | 本田技研工业(中国)投资有限公司 | The reinforcement structure at front longitudinal beam rear portion |
| CN110588784A (en) * | 2019-09-28 | 2019-12-20 | 浙江飞碟汽车制造有限公司 | Automobile longitudinal beam structure and manufacturing method thereof |
| CN110588784B (en) * | 2019-09-28 | 2023-08-29 | 浙江飞碟汽车制造有限公司 | Automobile longitudinal beam structure and manufacturing method thereof |
| CN111516757A (en) * | 2020-04-10 | 2020-08-11 | 东风柳州汽车有限公司 | Longeron structure and car |
| CN112537370A (en) * | 2020-12-10 | 2021-03-23 | 奇瑞新能源汽车股份有限公司 | Vehicle front longitudinal beam assembly and vehicle |
| CN114802449A (en) * | 2022-03-25 | 2022-07-29 | 东风汽车集团股份有限公司 | Automobile longitudinal beam group front section |
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| CN105818862B (en) | 2018-06-19 |
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