CN209888812U - Pedestrian front end protection assembly and vehicle - Google Patents

Abstract

The lower vehicle in order to overcome prior art chassis has the rigidity of going up bearing structure too big now, and under bracing structure's rigidity is not enough, easily leads to pedestrian's shank to warp unreasonablely, causes the problem of great injury, the utility model provides a pedestrian front end protection assembly and vehicle. The utility model discloses a pedestrian front end protection assembly can effectively make its upper supporting structure, well bearing structure and under bracing structure's rigidity be the trend that from the top down scales up, and this makes at the in-process of pedestrian's shank striking vehicle front end, and absorption impact energy that can be better guides the shank to lean forward simultaneously, prevents that the shank from taking place great bending deformation, reduces the injury that the shank received.

Description

Pedestrian front end protection assembly and vehicle

Technical Field

The utility model relates to a vehicle field especially indicates pedestrian front end protection assembly field on the vehicle.

Background

With the increasing trend of the proportion of pedestrian casualties caused by collision between pedestrians and vehicles among the number of deaths caused by traffic accidents, regulations or standards are formulated continuously in all countries of the world to improve the pedestrian protection capability of automobiles, the pedestrian protection standards are enforced in European Union and Japan, and the mandatory national standards revision work is expected to be started immediately when the recommended national standard GB/T2450sumada 2009 is released in 2009 in China. The new vehicle evaluation protocol (NCAP) puts higher requirements on pedestrian protection, and at present, the pedestrian protection in China enters a rapid development stage, and the specific performance is that the regulation is updated more quickly and the evaluation system is stricter. Therefore, it is an important subject to improve the protection of pedestrians by optimizing the structure of the automobile in order to reduce the damage degree of pedestrians.

When a pedestrian collides with a traveling vehicle, the vehicle generally needs to absorb a part of the energy of the vehicle through front deformation, and the energy transmitted to the pedestrian is reduced. The front parts of the structures related to deformation can be collectively called as a pedestrian front end protection assembly, and at present, the common pedestrian front end protection assembly is roughly divided into an upper section of supporting structure, a middle section of supporting structure and a lower section of supporting structure; the pedestrian protection requires comprehensive control of the leg injury value, namely the rigidity of the upper, middle and lower support structures of the front structure of the automobile needs to be integrally matched through the automobile type, the legs are guided to incline towards the favorable direction, and the leg injury value is reduced, so that the reasonable arrangement and the structural design of the upper, middle and lower main support parts are the key for improving the pedestrian protection performance of the region.

At present, the common upper supporting structure mainly comprises an engine cover; the middle supporting structure mainly comprises a front protective skin, a front anti-collision beam and energy-absorbing foam; the lower supporting structure mainly comprises a crus protecting bracket and the like; the energy-absorbing foam is positioned between the front anti-collision beam and the front protective skin, so that the pedestrian can be protected when being impacted. This current three-section bearing structure can play the guard action to the pedestrian to a certain extent. However, for a car with a lower chassis, the rigidity of the existing upper supporting structure is too high, and the rigidity of the lower supporting structure is not enough, so that the legs of the pedestrian are not reasonably deformed, and the car is damaged greatly.

SUMMERY OF THE UTILITY MODEL

The car that is lower for overcoming the prior art chassis has the rigidity of going up bearing structure too big now, and under bracing structure's rigidity is not enough, easily leads to pedestrian's shank to warp unreasonablely, causes the problem of great injury, the utility model provides a pedestrian front end protection assembly and vehicle.

One aspect of the utility model provides a pedestrian front end protection assembly, which comprises an upper support structure, a middle support structure and a lower support structure;

the rigidity of the upper support structure is less than that of the middle support structure, and the rigidity of the middle support structure is less than that of the lower support structure.

The utility model discloses a pedestrian front end protection assembly can effectively make its upper supporting structure, well bearing structure and under bracing structure's rigidity be the trend that from the top down scales up, and this makes at the in-process of pedestrian's shank striking vehicle front end, and absorption impact energy that can be better guides the shank to lean forward simultaneously, prevents that the shank from taking place great bending deformation, reduces the injury that the shank received.

Further, the upper support structure comprises an engine cover and a bright decorative strip;

the middle support structure comprises a front protective skin, an air inlet grille, energy-absorbing foam and a front anti-collision beam; the air inlet grille is embedded in the front protective skin; in the direction of a vehicle body, the energy-absorbing foam and the front anti-collision beam are sequentially arranged at the rear part of the front protective skin;

the lower support structure comprises a guide plate and a shank protection bracket, and the guide plate and the shank protection bracket are provided with reinforcing structures;

in the vehicle length direction, the front end surface of the engine cover is positioned in front of the front end surface of the front anti-collision beam; the front end face of the energy-absorbing foam is positioned in front of the front end face of the engine cover; the front end surface of the bright decorative strip is positioned in front of the front end surface of the engine cover;

according to the structure, the front end face of the energy-absorbing foam is arranged in front of the front end face of the engine cover, and the front end face of the engine cover is positioned in front of the front end face of the front anti-collision beam; the front end surface of the bright decorative strip is positioned in front of the front end surface of the engine cover; the structure can be gradually guided to crush and absorb energy successively, so that the stress of the crus is effectively prevented from being too concentrated in the process of impact of the crus of the pedestrian, and the damage to the crus is reduced; the rigidity of the upper supporting structure is weaker, the upper supporting structure can be effectively collapsed in the leg impact process of a pedestrian, impact energy is absorbed, the energy-absorbing foam of the middle supporting structure is moderate in rigidity and is matched with the lower supporting structure with higher rigidity, the leg of the pedestrian is enabled to tilt forwards, the injuries of parts such as leg knee ligaments and shank shin bones are reduced, and the leg protection performance of the pedestrian is effectively improved.

Furthermore, the upper ends of the bright decorative strip and the air inlet grille are cambered surfaces, and the angle of the cambered surfaces is matched with the front end of the engine cover. Will bright trim with the upper end of air-inlet grille sets to the cambered surface, makes the transition angle between bonnet, air-inlet grille and the bright trim more gentle, and too big is crossed unlike the transition angle of traditional structure, can realize like this that pedestrian's shank strikes bearing structure, and guide leg portion inclines, reduces the injury value of pedestrian's shank.

Furthermore, a grid groove is formed in the front protective skin, and an air inlet grid is arranged in the grid groove.

Furthermore, an upper end mounting part is arranged on the upper end surface of the front protective skin; the upper end mounting part is mounted on the front security mounting bracket through a bolt.

Furthermore, the inner wall of the front protective skin is designed into an arc shape matched with the shape of the energy-absorbing foam, and the energy-absorbing foam is installed on the front anti-collision beam.

Furthermore, a plurality of weakening holes are formed in the middle of the front protective skin; and the energy-absorbing foam is provided with a vertical weakening groove and a transverse weakening groove.

Further, the shank protection bracket comprises a first reinforcing section and a second reinforcing section which are arranged in the front-back direction of the vehicle body;

the first reinforcing section and the second reinforcing section are alternately provided with reinforcing ribs along the vehicle width direction; the first reinforcing section and the second reinforcing section are gradually increased in vertical height from the front to the rear of the vehicle body, so that the side section of the lower leg protection bracket is in a slope shape with a certain angle.

Furthermore, an upper grid extends upwards from the air inlet grid, the upper grid is positioned above the upper end face of the front protective skin, and the upper grid is mounted on an upper grid mounting bracket; the bright decorative strip is installed on the upper grid through a buckle.

Furthermore, the lower support structure also comprises an outer decoration piece, and an arc-shaped groove is formed in the outer decoration piece; the front end of the shank protecting bracket is wedge-shaped;

the front end of the guide plate is provided with an insertion part;

the insertion part is inserted between the arc-shaped groove and the front end of the lower leg protection bracket.

Furthermore, a reinforcing rib is arranged on the insertion part.

The utility model discloses the second aspect provides a vehicle, pedestrian front end protection assembly on the front end of vehicle.

The utility model discloses a vehicle, its pedestrian front end protection assembly can effectively make its upper supporting structure, well bearing structure and under bracing structure's rigidity be the trend that from the top down scales up, and this makes at the in-process of pedestrian's shank striking vehicle front end, and absorption impact energy that can be better guides the shank to lean forward simultaneously, prevents that the shank from taking place great bending deformation, reduces the injury that the shank received.

Drawings

Fig. 1 is a schematic perspective view of a pedestrian front end protection assembly according to an embodiment of the present invention;

fig. 2 is a schematic right-view of a pedestrian front end protection assembly according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a pedestrian front end protection assembly in an automobile according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of a front protective skin provided in an embodiment of the present invention;

FIG. 5 is an exploded view of a portion of the front protection assembly for pedestrians in a vehicle according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of a foam block and a front impact beam provided in an embodiment of the present invention;

FIG. 7 is a perspective view of an exterior trim piece and a lower leg protective brace provided in an embodiment of the present invention;

fig. 8 is a schematic perspective view of a baffle provided in an embodiment of the present invention;

FIG. 9 is a schematic diagram of the relationship between a pedestrian's leg and an automotive pedestrian front end protection assembly provided in an embodiment of the present invention before a collision;

FIG. 10 is a schematic illustration of the forward lean guidance and injury reduction effect provided in an embodiment of the present invention in the event of a collision between a pedestrian's leg and an automotive pedestrian front end protection assembly;

FIG. 11 is a schematic diagram of the injury effect caused by the collision between the leg of a pedestrian and the front end protection assembly of the automobile pedestrian when the rigidity of the upper supporting structure is high and the rigidity of the middle and lower supporting structures is low;

FIG. 12 is a schematic illustration of the forward lean effect of a pedestrian leg impacting an automotive pedestrian front end protection assembly provided with an upper, middle and lower support structure of comparable stiffness;

FIG. 13 is a schematic block diagram of a vehicle provided in an embodiment of the present application.

Wherein, 1, an upper supporting structure; 2. a middle support structure; 3. a lower support structure; 4. a leg portion;

11. an engine cover; 12. bright decorative strips;

21. an air intake grille; 22. an energy absorbing foam; 23. front protective covering; 24. a front impact beam;

211. an upper grid;

221. mounting holes; 222. a vertical weakening tank; 223. a transverse weakening tank; 224. a first weakening tank; 225. a second weakening tank;

231. an upper end mounting portion; 232. a limiting bulge; 233. connecting holes; 234. a weakening hole; 235. a grating groove;

31. an exterior trim; 32. a shank protection bracket; 33. a baffle;

321. a first reinforcing section; 322. a second reinforcing section; 323. reinforcing ribs;

331. an insertion portion; 332. reinforcing ribs;

41. a thigh; 42. a knee portion; 43. the lower leg.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

As shown in fig. 13, this embodiment is mainly directed to a vehicle 10000 with a lower chassis, and particularly to a pedestrian front end protection assembly 1000 suitable for a car, and in this embodiment, the remaining structure of the vehicle 10000 is not improved, so that only the pedestrian front end protection assembly 1000 is explained, and details of the remaining structure are not repeated.

As shown in fig. 1, 2 and 3, a pedestrian front end protection assembly 1000 includes an upper support structure 1, a middle support structure 2 and a lower support structure 3; the rigidity of the upper support structure 1 is less than the rigidity of the middle support structure 2, and the rigidity of the middle support structure 2 is less than the rigidity of the lower support structure 3. The utility model discloses a pedestrian front end protection assembly 1000 can effectively make its upper support structure 1, well bearing structure 2 and lower bearing structure 3's rigidity be the trend that from the top down scales up, and this makes the in-process of going into people's shank striking vehicle 10000 front end, and absorption impact energy that can be better guides the shank to lean forward simultaneously, prevents that the shank from taking place great bending deformation, reduces the injury that the shank received.

The upper support structure 1 includes an engine cover 11 and a bright trim 12; in the embodiment, the upper supporting structure 1 is not internally provided with a reinforcing rib, so that the rigidity is relatively small, the leg can be effectively crushed when being impacted, and the leg is matched with the lower supporting structure 3, so that the leg is inclined forwards, and the injury value of the leg of a pedestrian is reduced;

the middle support structure 2 comprises a front protective skin 23, an air inlet grille 21, energy-absorbing foam 22 and a front impact beam 24; the air inlet grille 21 is embedded in the front protective skin 23; in the vehicle body direction, energy-absorbing foam 22 and front impact beam 24 are arranged in this order at the rear of front protective skin 23; in the embodiment, the front protective skin 23 and the air inlet grille 21 are substantially positioned in the same vertical plane, so that the stress of the lower leg is effectively prevented from being too concentrated in the process of impact of the lower leg of a pedestrian, and the damage to the lower leg is reduced.

The lower support structure 3 comprises a guide plate 33, an outer decoration piece 31 and a shank protection bracket 32; the guide plate 33 and the crus protection bracket 32 are provided with reinforcing structures; the reinforcing structure includes reinforcing ribs, energy absorbing ribs, and the like, wherein a large number of reinforcing ribs are preferably provided inside the lower leg protecting support 32, and the longitudinal energy absorbing ribs are arranged on the front end surface of the front deflector 33 in the vehicle width direction. As will be further described below.

Wherein, in the vehicle length direction, the front end surface of the engine cover 11 is positioned in front of the front end surface of the front impact beam 24; the front end surface of energy absorbing foam 22 is located forward of the front end surface of engine cover 11; the front end face of the bright decorative strip 12 is positioned in front of the front end face of the engine cover 11, and the preferable distance is more than or equal to 30 mm;

the upper ends of the bright decorative strip 12 and the air inlet grille 21 are cambered surfaces, and the angle of the cambered surfaces is matched with the front end of the engine cover 11; therefore, the transition angle between the engine cover 11 and the upper end surface of the air inlet grille 21 and the bright decorative strip 12 is relatively gentle, and is not too large like the traditional structure, so that when the leg part of a pedestrian collides with the upper support area, the leg part is guided to incline forwards, and the injury value of the leg part of the pedestrian is reduced.

The front protective skin 23 is a trim member covering the front of the vehicle body, and is generally made of a plastic material that is easily crushable and deformable. Which is largely housed within the central support structure 2 but may actually extend partially up and down; the upward extension may partially cover the upper support structure 1; the downward extension may partially cover the lower support structure 3; the automobile bumper has the advantages that the appearance of the front end of an automobile is limited and internal components are protected, and the automobile is deformed and crushed when the automobile collides with a pedestrian to protect the pedestrian.

As shown in fig. 4, the front protective skin 23 is provided with a grill groove 235, and the intake grill 21 is installed in the grill groove 235. The periphery of the air inlet grille 21 is connected with a front protective skin 23.

Wherein, the upper end surface of the front protective skin 23 is provided with an upper end mounting part 231; the upper end mounting portion 231 is mounted to the front safety mounting bracket by bolts.

The front protective skin 23 is provided with a limiting protrusion 232 and a connecting hole 233 for connecting the air intake grille 21, and the inner wall of the front protective skin 23 is designed into an arc shape matching with the shape of the energy-absorbing foam 22, so that the energy-absorbing foam 22 is limited on the inner wall of the front protective skin 23. Wherein, the middle part of the front protective skin 23 is provided with a plurality of weakening holes 234. The structure ensures that the middle supporting structure 2 can be effectively collapsed in the process of collision of the legs of the pedestrian, and the injury to the legs is reduced.

The air intake grille 21 is shown in fig. 5, and further, the air intake grille 21 extends upwards to form an upper grille 211, the upper grille 211 is positioned above the upper end surface of the front protective skin 23, the upper grille 211 is mounted on an upper grille mounting bracket, and the front protective mounting bracket and the upper grille mounting bracket are both arranged on a front end module of the vehicle; the bright decoration strip 12 is mounted on the upper grill 211 by a snap.

As shown in fig. 6, the energy-absorbing foam 22 is provided with a plurality of vertical weakening grooves 222 and transverse weakening grooves 223, in this example, the left and right sides of the front end surface of the energy-absorbing foam 22 are respectively provided with one vertical weakening groove 222 and one transverse weakening groove 223, so as to reduce the rigidity of the foam material, save the consumption of the foam material, effectively absorb the kinetic energy, and reduce the rigidity of the middle support structure 2. Meanwhile, the energy-absorbing foam 22 is also provided with a mounting hole 221, the mounting hole 221 is used for mounting a trailer bolt sleeve, the trailer bolt sleeve is cylindrical, after penetrating through the energy-absorbing foam 22, the rear end of the trailer bolt sleeve is mounted at the joint of the front anti-collision beam and the energy-absorbing box, the front end of the trailer bolt sleeve is provided with a threaded hole, and a trailer hook is mounted; meanwhile, a first weakening groove 224 and a second weakening groove 225 are further formed in the present example to further weaken the rigidity of the energy-absorbing foam 22; in the embodiment, the energy-absorbing foam 22 has a simple structure, and the limiting mode of the energy-absorbing foam 22 is simple and effective, so that the production and installation are convenient.

As shown in fig. 7, the lower leg-protecting bracket 32 includes a first reinforcing section 321 and a second reinforcing section 322 arranged in the front-rear direction in the vehicle body direction;

the first reinforcing segments 321 and the second reinforcing segments 322 are alternately provided with reinforcing ribs 323 along the vehicle width direction; the first reinforcing section 321 and the second reinforcing section 322 are gradually increased in vertical height from the front to the rear of the vehicle body, so that the side cross section of the lower leg protection bracket 32 is in a slope shape with a certain angle. The slope-shaped design enables the longitudinal rigidity of the lower leg protection bracket 32 to be gradually increased from front to back (in the front-back direction of the vehicle body); the height of the joint of the first reinforcing section 321 and the second reinforcing section 322 is lower than the height of the second reinforcing section 322 close to the body in white, and corresponds to the slope-shaped side wall. The rigidity of the first reinforcing section 321 of the slope-shaped lower leg protection bracket 32 is lower than that of the second reinforcing section 322, so that when the lower leg is contacted with the lower leg protection bracket 32 in a leg collision, the first reinforcing section 321 can be deformed to a certain degree preferentially, but is enough to support the lower part of the lower leg.

An arc-shaped groove is formed in the outer decoration piece 31 of the lower support structure 3; the front end of the shank protecting bracket 32 is wedge-shaped;

as shown in fig. 8, the front end of the baffle 33 is provided with an insertion portion 331; preferably, the insertion portion 331 is provided with a rib 332.

The insertion portion 331 is inserted between the arc-shaped groove and the front end of the lower leg-protecting bracket 32.

Preferably, the lower leg protection bracket 32 can adjust local rigidity by forming a collapsing hole in a gap between the energy absorbing ribs 323, so as to cope with a local lower leg injury value.

Preferably, the shapes, installation angles and installation positions of the air intake grille 21 and the front protective skin 23 can be extended or reduced according to the actual vehicle type. The inner side of the bright decoration strip 12 can be also provided with a reinforcing piece according to the actual requirement, and the rigidity of the bright decoration strip 12 can be controlled by adjusting the structure and the material thickness of the reinforcing piece. The shape, number and position of the weakening grooves of the energy-absorbing foam 22 can be changed according to the actual situation, and foam materials with different foaming rates can be selected according to the actual stiffness requirement.

The protection principle of the pedestrian front-end protection assembly 1000 in this example is described as follows:

as shown in fig. 9, the leg 4 of the pedestrian comprises a thigh 41, a lower leg 43 and a knee 42, on which the relevant parameters: tibial moments T1, T2, T3, T4, femoral moments F1, F2, F3, ligament elongation CL (including ACL, PCL, MCL, LCL, (ACL: artificial ligament, ACL, anterior cruciate ligament), PCL: spatial ligament, PCL, Posterior cruciate ligament; MCL: Medial ligament, MCL, Medial ligament, LCL, local ligament

The height H1 from the front edge reference line of the engine cover to the ground, the height H2 from the ground of the lower leg protection bracket 32, the horizontal distance W1 between the front edge reference line of the engine cover and the upper reference line of the bumper, and the horizontal distance W2 between the lower leg protection bracket 32 and the front end of the front protection skin 23.

The horizontal distance W1 between the front edge reference line of the engine cover and the upper reference line of the bumper influences the modeling characteristics of the front face of the vehicle, and the smaller W1 is, the more beneficial to controlling the extension amount of knee cruciate ligaments of the lower leg 43 and the damage of femoral bending moment; the ground clearance H2 of the shank protection bracket 32 influences the modeling characteristics of the lower part of the front face of the vehicle, the smaller the H2 is, the more beneficial the leg type movement posture is to control, and the knee ligament PCL, ACL, MCL and tibia bending moment injuries can be effectively reduced; the horizontal distance W2 between the lower leg protection bracket 32 and the front end of the front protective skin 23 influences the acting time of the lower leg protection bracket 32 in collision, the smaller W2 is, the earlier the lower leg protection bracket 32 acts, H1 is mainly related to the height of a vehicle body, the relative height of legs and the vehicle is influenced, and for a car with a lower chassis, the smaller H1 is, the more beneficial to guiding the forward leg to tilt, and the injury value is reduced.

As shown in fig. 10, in this example, the rigidity of the upper support structure 1, the middle support structure 2 and the lower support structure 3 is weakened from a gradient, the ideal center of mass of the leg 4 is at the knee 42, and in the case of a car, the height of the front impact beam 24 from the ground is smaller than the height of the center of mass of the leg 4 (i.e., the center of mass of the knee 42), and when the car is impacted, the center of mass tends to move forward (toward the direction of the vehicle head), so the rigidity of the upper support structure 1, the middle support structure 2 and the lower support structure 3 is designed to be distributed in a gradient manner; the leg 4 of the pedestrian inclines forwards towards the direction of the head of the vehicle when in collision, so that the ligament elongation of the knee 42 can be reduced, the injury value of the leg 4 is reduced, and the purpose of protecting the leg 4 of the pedestrian is achieved.

As shown in fig. 11, if the rigidity of the upper support structure 1, the middle support structure 2 and the lower support structure 3 is designed to be high in rigidity of the upper support structure 1, low in rigidity of the middle support structure 2 and the lower support structure 3, in the collision process of the leg 4, the center of mass of the knee 42 is higher than that of the front impact beam 24, the thigh 41 has a forward bending movement tendency, because the rigidity of the upper support structure 1 is high, the thigh 41 is supported by the upper support structure 1, and the rigidity of the lower support structure 3 is low, the lower leg 43 is easy to deform, and at this time, the lower leg 43 bends towards the front lower part of the vehicle body (towards the direction of the vehicle head), and because of the height of the car and the modeling, the protruding part of the front face of the vehicle can push against the knee 43, so that the.

If the rigidity of the middle upper support structure 1, the middle support structure 2 and the lower support structure 3 is designed to be equivalent to the rigidity of the three structures, the middle lower part of the leg 4 is supported in translation due to the height of the car and the modeling during the collision of the leg 4, but the center of mass of the leg 4 is higher than that of the front anti-collision beam 24, the thigh 41 still has the moving tendency of forward bending, the protruding part of the front face of the vehicle can be propped against the knee part 42 of the leg 4, the bending deformation of the leg 4 is too large, the ligament elongation of the knee part 42 is too large, and the pedestrian leg 4 is damaged highly.

In conclusion, for the vehicle with a lower chassis, the structure optimized in the application can well reduce the injury value of the leg 4 and protect the leg 4 of the pedestrian.

In the vehicle disclosed in the embodiment, the pedestrian front end protection assembly 1000 is improved, and the upper ends of the bright decorative strip 12 and the air inlet grille 21 are arranged to be arc surfaces, so that the transition angle among the engine cover 11, the air inlet grille 21 and the bright decorative strip 12 is relatively gentle, and is not too large as the transition angle of a traditional structure, so that when the leg 4 of a pedestrian impacts the supporting structure 1, the leg 4 is guided to tilt forward, and the injury value of the leg 4 of the pedestrian is reduced. Meanwhile, the front end surface of the energy-absorbing foam 22 is arranged in front of the front end surface of the engine cover 11, and the front end surface of the engine cover 11 is positioned in front of the front end surface of the front impact beam 24; and the front end face of the bright decorative strip 12 is positioned in front of the front end face of the engine cover 11; the structure can be gradually guided to crush and absorb energy successively, so that the stress of the lower leg 43 is effectively prevented from being too concentrated in the process of impacting the leg 4 of the pedestrian, and the damage to the lower leg 43 is reduced; the rigidity of the upper supporting structure 1 is weak, the upper supporting structure can be effectively collapsed in the collision process of the leg 4 of the pedestrian, impact energy is absorbed, the rigidity of the energy-absorbing foam 22 of the middle supporting structure 2 is moderate, and the energy-absorbing foam is matched with the lower supporting structure 3 with high rigidity, so that the leg 4 of the pedestrian is inclined forwards, the damage to parts such as a knee 42 ligament of the leg 4, a shin bone 43 of the calf is reduced, and the performance of protecting the leg 4 of the pedestrian is effectively improved. Therefore, the optimally designed pedestrian front end protection assembly 1000 can effectively enable the rigidity of the upper supporting structure 1, the middle supporting structure 2 and the lower supporting structure 3 to be gradually increased from top to bottom, so that impact energy can be better absorbed in the process that the leg 4 of a pedestrian impacts the front end of a vehicle, meanwhile, the leg 4 is guided to tilt forwards, the leg 43 is prevented from being bent and deformed greatly, and the injury to the leg 4 is reduced.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (12)

1. A pedestrian front end protection assembly comprises an upper support structure, a middle support structure and a lower support structure; the rigidity of the upper supporting structure is smaller than that of the middle supporting structure, and the rigidity of the middle supporting structure is smaller than that of the lower supporting structure.

2. The pedestrian front end protection assembly of claim 1, wherein the upper support structure includes a hood and a spangle;

the middle support structure comprises a front protective skin, an air inlet grille, energy-absorbing foam and a front anti-collision beam; the air inlet grille is embedded in the front protective skin; in the direction of a vehicle body, the energy-absorbing foam and the front anti-collision beam are sequentially arranged at the rear part of the front protective skin;

the lower support structure comprises a guide plate and a shank protection bracket, and the guide plate and the shank protection bracket are provided with reinforcing structures;

in the longitudinal direction of the vehicle, the front end surface of the engine cover is positioned in front of the front end surface of the front anti-collision beam; the front end face of the energy-absorbing foam is positioned in front of the front end face of the engine cover; the front end face of the bright decorative strip is positioned in front of the front end face of the engine cover.

3. The pedestrian front end protection assembly according to claim 2, wherein the upper ends of the light decoration strip and the air intake grille are cambered surfaces, and the angle of the cambered surfaces is matched with the front end surface of the engine cover.

4. The pedestrian front end protection assembly of claim 3, wherein the front protective skin is provided with a grille slot in which an air intake grille is mounted.

5. The pedestrian front end protection assembly of claim 4, wherein the upper end face of the front protective skin is provided with an upper end mounting portion; the upper end mounting part is mounted on the front security mounting bracket through a bolt.

6. The pedestrian front end protection assembly of claim 2, wherein an inner wall of the front protective skin is configured in an arc shape that matches a profile of the energy absorbing foam mounted to the front impact beam.

7. The pedestrian front end protection assembly of claim 6, wherein the front protective skin has a plurality of weakened holes in a central portion thereof; and the energy-absorbing foam is provided with a vertical weakening groove and a transverse weakening groove.

8. The pedestrian front end protection assembly of claim 2, wherein the lower leg protection bracket includes a first reinforcement section and a second reinforcement section arranged fore and aft in a vehicle body direction;

the first reinforcing section and the second reinforcing section are alternately provided with reinforcing ribs along the vehicle width direction; the first reinforcing section and the second reinforcing section are gradually increased in vertical height from the front to the rear of the vehicle body, so that the side section of the lower leg protection bracket is in a slope shape with a certain angle.

9. The pedestrian front end protection assembly of claim 8, wherein the inlet grille extends upwardly with an upper grille positioned above an upper end surface of the front protective skin, the upper grille being mounted to an upper grille mounting bracket; the bright decorative strip is installed on the upper grid through a buckle.

10. The pedestrian front end protection assembly of claim 2, wherein the lower support structure further includes an exterior trim having an arcuate groove therein; the front end of the shank protecting bracket is wedge-shaped;

the front end of the guide plate is provided with an insertion part;

the insertion part is inserted between the arc-shaped groove and the front end of the lower leg protection bracket.

11. The pedestrian front end protection assembly of claim 10, wherein the insert portion is provided with a reinforcement rib.

12. A vehicle, characterized in that the front end of the vehicle is provided with a pedestrian front end protection assembly according to any one of claims 1-11.

Images