Enclose superstructure before based on protection is bumped to pedestrian's head
阅读说明:本技术 一种基于行人头碰保护的前围上部结构 (Enclose superstructure before based on protection is bumped to pedestrian's head ) 是由 申中一 杨淑娟 王镇斌 宋刘洋 陈孔武 于 2019-10-31 设计创作,主要内容包括:本发明公开了一种基于行人头碰保护的前围上部结构,涉及汽车技术领域。该装置包括发动机罩板、流水槽和前风窗板组件,发动机罩板包括发动机罩外板和发动机罩里板,流水槽包括前围挡板、前围集风板和加强筋板,前风窗板组件包括设于前围集风板顶部的安装板和设于安装板顶部的下装饰板,发动机罩外板与前围集风板之间的竖直距离不小于140mm,下装饰板的竖向投影宽度不小于60mm,且下装饰板远离流水槽的一端与发动机罩外板靠近流水槽的一端沿水平面的跨度距离不大于80mm。本发明提供的基于行人头碰保护的前围上部结构,在满足流水槽、下装饰板和安装板基础性能要求的基础上,提供一种能够充分吸收碰撞冲击能量,并提高行人保护性能的前围上部结构。(The invention discloses a front wall upper structure based on pedestrian head collision protection, and relates to the technical field of automobiles. The device includes the engine hood board, tye and preceding wind window board subassembly, the engine hood board includes engine hood planking and engine hood back plate, the tye includes preceding baffle, preceding enclose wind collecting plate and deep floor, preceding wind window board subassembly is including enclosing the mounting panel at wind collecting plate top and locating the lower decorative board at mounting panel top before locating, vertical distance between engine hood planking and the preceding wind collecting plate is not less than 140mm, the vertical projection width of lower decorative board is not less than 60mm, and the one end that the tye was kept away from to decorative board down is not more than 80mm with the one end that the engine hood planking is close to the tye along the span distance of horizontal plane. The invention provides a front wall upper structure based on pedestrian head collision protection, which can fully absorb collision impact energy and improve pedestrian protection performance on the basis of meeting the basic performance requirements of a launder, a lower decorative plate and a mounting plate.)
1. The utility model provides a enclose superstructure before based on protection is bumped to pedestrian's head which characterized in that, it includes:
an engine cover panel (1) comprising an outer hood panel (10) and an inner hood panel (11) located below the outer hood panel (10);
the water flowing groove is positioned below the engine hood panel (1), the water flowing groove comprises a front wall baffle plate (20), a front wall wind collecting plate (21) and a reinforcing rib plate (22), the reinforcing rib plate (22) is positioned below the front wall wind collecting plate (21), the front wall baffle plate (20) is arranged on one side of the front wall wind collecting plate (21) and forms a V-shaped structure with the front wall wind collecting plate, and the vertical distance H1 between the engine hood outer panel (10) and the front wall wind collecting plate (21) is not less than 140 mm;
preceding wind louver subassembly, it is including locating mounting panel (31) at preceding wind collecting plate (21) top and locating lower decorative board (30) at mounting panel (31) top, the vertical projection width L1 of lower decorative board (30) is not less than 60mm, just lower decorative board (30) keep away from the one end of tye with engine bonnet planking (10) are close to the span distance L2 of one end along the horizontal plane of tye is not more than 80 mm.
2. The cowl upper structure based on pedestrian head collision protection according to claim 1, wherein: the vertical distance H2 between the joint of the front enclosing baffle (20) and the front enclosing wind collecting plate (21) and the outer hood plate (10) is not less than 220mm, the vertical distance H5 between the outer hood plate (10) and the inner hood plate (11) is not less than 40mm, and the vertical distance H3 from the top to the bottom of the mounting plate (31) is not less than 50 mm.
3. The cowl upper structure based on pedestrian head collision protection according to claim 1, wherein: the span distance L3 between one end of the hood outer panel (10) close to the launder and one end of the reinforcing rib plate (22) far away from the front wall baffle (20) along the horizontal plane is not more than 35 mm.
4. The cowl upper structure based on pedestrian head collision protection according to claim 1, wherein: the front wall upper structure further comprises a front windshield (4), the lower decorative plate (30) comprises a first water retaining piece (304) and a second water retaining piece (305), and one end of the first water retaining piece (304) is connected with the front windshield (4) and forms an included angle with the front windshield (4)
5. The cowl upper structure based on pedestrian head collision protection according to claim 4, wherein: the lower decorative plate (30) further comprises a connecting piece (301), a first structural piece (302) and a second structural piece (303) from left to right, one end of the first structural piece (302) is connected with the connecting piece (301), the other end of the first structural piece is connected with the second structural piece (303) and is connected with the second structureThe parts (303) form a Z-shaped structure, and the included angle of the joint of the first structural part (302) and the second structural part (303)Not less than 110 degrees, the bottom of the connecting piece (301) is connected with the top of the mounting plate (31), and one end of the connecting piece (301) far away from the first structural member (302) is connected with one end of the second water retaining piece (305) far away from the first water retaining piece (304).
6. The cowl upper structure based on pedestrian head collision protection according to claim 4, wherein: the front wall upper structure further comprises a beam outer plate (5) arranged below the front windshield (4), the beam outer plate (5) comprises a vertical part (50), and an included angle between the vertical part (50) and the front windshield (4)Not less than 60 degrees, and the included angle of the vertical part (50) and the surface of the front wall baffle plate (20) connected with the front wall wind collecting plate (21)
7. The cowl upper structure based on pedestrian head collision protection according to claim 5, wherein: the one side of the second water retaining part (305) far away from the first water retaining part (304) is provided with a reticular hole, the vertex angles and the corners of the connection part of the first water retaining part (304) and the second water retaining part (305) are all round angles, and the connection part of the first structural part (302) and the second structural part (303) is also a round angle.
8. The cowl upper structure based on pedestrian head collision protection according to claim 5, wherein: the vertex angle department of the junction of second structure (303) and connecting piece (301) is equipped with the multichannel and weakens the groove, the junction of first structure (302) and second structure (303) also is equipped with one weaken the groove.
9. The cowl upper structure based on pedestrian head collision protection according to claim 1, wherein: the thickness of the lower decorative plate (30) is 1.8-2 mm.
10. The cowl upper structure based on pedestrian head collision protection according to claim 1, wherein: and sound-proof and heat-insulating cotton (6) is attached to one side surface, far away from the water flowing groove, of the mounting plate (31).
Technical Field
The invention relates to the technical field of automobiles, in particular to a front wall upper structure based on pedestrian head collision protection.
Background
With the high-speed development of the automobile industry, the automobile popularity is higher and higher, and collision accidents are frequent due to increasingly complex traffic road conditions. The number of dead people per ten thousand in China reaches 6.2, which is 4-10 times that in developed countries in the world such as Japan. In recent years, with the continuous progress of automobile manufacturing technology, the safety measures of automobiles are increasingly perfected, so that the driving safety and the passenger protection are greatly improved. However, in a road traffic accident, pedestrians are often the largest victimized group, and according to investigation, the head of pedestrians in all countries of the world is 31.4% of the body parts damaged by the traffic accident, so that the development of collision analysis research on pedestrian safety is of great significance and is also irrevocable responsibility of collision safety developers.
A common protection technique has been developed to absorb the impact force of a pedestrian during an impact by adding a structure, such as adding an inflatable airbag to the front wall, adding a sealing element and a decorative plate under the windshield below the hood to weaken and improve energy absorption, and adding a decorative part at the rear edge of the hood to improve the operation of energy absorption during an impact. Although the impact force of the pedestrian in the collision can be weakened to a certain degree by adding the structure, the problem is not solved from the source, the weakening degree is limited, and the added structure often occupies a certain space and inevitably sacrifices the space or the performance of other parts of the automobile.
The head-on injury of pedestrians mainly comes from the engine hood and the front windshield, and when the engine hood is impacted and collapsed downwards, the engine hood can be blocked by the lower decorative plate of the front windshield and the launder, so that the head-on injury value of pedestrians is large and even death is caused. The structure of the water channels at the upper part of the front wall of the current common vehicle type is generally divided into two types, one type is a U-shaped water channel directly welded on the outer plate of the lower beam of the front windshield, and as the water channel is generally far away from the engine hood, a reinforcing plate is welded below the water channel for improving the self rigidity mode and NVH performance under the condition of higher Z-direction height, and the pedestrian head collision injury value is generally higher due to the larger rigidity and difficult deformation; the other type is influenced by the shape of the whole vehicle, the outer plate of the lower beam of the front air window is very close to the front, the U-shaped water flowing groove is close to the back, a mounting point cannot be provided for the lower decorative plate of the front air window, a metal plate needs to be welded on the U-shaped water flowing groove, a reinforcing plate is welded below the U-shaped water flowing groove for improving the rigidity and NVH performance of the U-shaped water flowing groove, and the head collision injury value of pedestrians is high. Therefore, how to improve the collision protection performance of pedestrians to reduce casualties in traffic accidents is a main research direction.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a front wall upper structure based on pedestrian head collision protection, which can fully absorb collision impact energy and improve the pedestrian protection performance on the basis of meeting the basic performance requirements of a launder, a lower decorative plate and a mounting plate.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
the engine cover plate comprises an engine cover outer plate and an engine cover inner plate positioned below the engine cover outer plate;
the water flowing tank is positioned below the engine cover plate and comprises a front wall baffle plate, a front wall wind collecting plate and a reinforcing rib plate, the reinforcing rib plate is positioned below the front wall wind collecting plate, the front wall baffle plate is arranged on one side of the front wall wind collecting plate and forms a V-shaped structure with the front wall wind collecting plate, and the vertical distance between the engine cover outer plate and the front wall wind collecting plate is not less than 140 mm;
preceding wind louver board subassembly, it is including locating enclose the mounting panel at wind collecting plate top before with locate the lower decorative board at mounting panel top, the vertical projection width of lower decorative board is not less than 60mm, just the decorative board is kept away from down the one end of tye with the engine bonnet planking is close to the span distance of one end along the horizontal plane of tye is not more than 80 mm.
On the basis of the technical scheme, the vertical distance between the joint of the front wall baffle and the front wall wind collecting plate and the outer plate of the engine hood is not less than 220mm, the vertical distance between the outer plate of the engine hood and the inner plate of the engine hood is not less than 40mm, and the vertical distance from the top to the bottom of the mounting plate is not less than 50 mm.
On the basis of the technical scheme, the span distance of one end, close to the launder, of the outer plate of the engine hood and one end, far away from the front wall baffle, of the reinforcing rib plate along the horizontal plane is not more than 35 mm.
On the basis of the technical scheme, the front wall upper structure further comprises a front windshield, the lower decorative plate comprises a first water retaining piece and a second water retaining piece, one end of the first water retaining piece is connected with the front windshield, an included angle between the first water retaining piece and the front windshield is not smaller than 95 degrees, the other end of the first water retaining piece is connected with one end of the second water retaining piece, and the second water retaining piece is far away from one face of the first water retaining piece and the included angle between the first water retaining piece and the head of a pedestrian in the collision test direction is not smaller than 60 degrees.
On the basis of the technical scheme, the lower decorative plate further comprises a connecting piece, a first structural piece and a second structural piece from left to right, one end of the first structural piece is connected with the connecting piece, the other end of the first structural piece is connected with the second structural piece and forms a Z-shaped structure with the second structural piece, an included angle of a connection position of the first structural piece and the second structural piece is not smaller than 110 degrees, the bottom of the connecting piece is connected with the top of the mounting plate, and one end, far away from the first structural piece, of the connecting piece is connected with one end, far away from the first water retaining piece, of the second water retaining piece.
On the basis of the technical scheme, the front wall upper structure further comprises a beam outer plate arranged below the front windshield, the beam outer plate comprises a vertical portion, the included angle between the vertical portion and the front windshield is not less than 60 degrees, the included angle between the vertical portion and the side, connected with the front wall wind collecting plate, of the front wall baffle is not less than 160 degrees, and the included angle between the side, connected with the front wall wind collecting plate, of the front wall baffle is not less than 85 degrees.
On the basis of the technical scheme, the second water retaining part is far away from one side of the first water retaining part, the top angles and the corners of the joints of the first water retaining part and the second water retaining part are rounded corners, and the joints of the first structural part and the second structural part are also rounded corners.
On the basis of the technical scheme, the vertex angle of the joint of the second structural member and the connecting member is provided with a plurality of weakening grooves, and the joint of the first structural member and the second structural member is also provided with one weakening groove.
On the basis of the technical scheme, the thickness of the lower decorative plate is 1.8-2 mm.
On the basis of the technical scheme, sound-insulation and heat-insulation cotton is attached to one side face, far away from the launder, of the mounting plate.
Compared with the prior art, the invention has the advantages that:
the front wall upper structure based on pedestrian head collision protection is simple in structure, small in number of parts, convenient to disassemble and assemble and low in cost, and the damage value of pedestrian head collision is reduced mainly through three aspects. Firstly, the vertical distance between an outer plate of the engine hood and a front wall wind collecting plate is increased to increase the collapsing space of parts at the lower part of the rear edge of the engine hood, so that the distance between the outer contour of the whole collision area and internal structural parts is increased, the collision deformation stroke is increased, and the collision energy is fully absorbed; secondly, by limiting the vertical projection width of the lower decorative plate and simultaneously limiting the span distance of one end of the lower decorative plate, which is far away from the launder, and one end of the engine hood outer plate, which is close to the launder, along the horizontal plane, the x-direction overlapping area of hard point parts arranged at the lower part of the rear edge of the engine hood and the engine hood is reduced, so that the depth of the parts on the upper part of the front wall in the engine hood is reduced, and the deformation obstruction is reduced; thirdly, the front wall upper structure is provided with a fillet and is subjected to local weakening treatment, the guide part is deformed or even broken towards the set direction when being subjected to larger damage energy, so that more collision energy is absorbed, and the protection performance of the structure on pedestrians during collision is fundamentally improved from the three aspects.
Drawings
FIG. 1 is a schematic structural view of a cowl upper structure based on pedestrian head impact protection in an embodiment of the present invention;
FIG. 2 is a schematic representation of reaction height and angle of a cowl superstructure based on pedestrian head impact protection in an embodiment of the present invention.
In the figure: 1-an engine hood panel, 10-an engine hood outer panel, 11-an engine hood inner panel, 20-a front enclosing baffle, 21-a front enclosing wind collecting plate, 22-a reinforcing rib plate, 30-a lower decorative plate, 301-a connecting piece, 302-a first structural member, 303-a second structural member, 304-a first water retaining member, 305-a second water retaining member, 31-a mounting plate, 4-a front windshield, 5-a crossbeam outer panel, 50-a vertical part, 6-sound and heat insulation cotton, 7-a collision object and 8-a sealing strip.
Detailed Description
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a cowl superstructure based on pedestrian head collision protection, including an engine cover panel 1, a gutter channel, and a front windshield assembly, wherein the engine cover panel 1 includes an outer
Referring to fig. 1-2, a vertical distance H1 between the hood
Specifically, the gutter channel has a main function of separating the passenger compartment and the engine compartment together with the dash panel assembly, draining rainwater flowing down along the
Further, referring to fig. 1 to 2, a vertical distance H2 between a joint of the
Further, referring to fig. 1 to 2, the cowl upper structure further includes a
Referring to fig. 1-2, the lower
Further, as shown in fig. 1-2, the cowl top structure further includes a cross member
Further, as shown in fig. 1-2, a mesh-shaped hole is formed in a side of the second
Specifically, the lower
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone with the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, are within the protection scope.
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