Support structure for protecting legs of a pedestrian and vehicle

Abstract

The application discloses a support structure and a car which are beneficial to protecting legs of pedestrians, and belongs to the technical field of vehicle safety. The support structure comprises a plastic support structure body, the plastic support structure body comprises a first support part and a second support part, the first support part comprises a first horizontal plate, a first vertical plate connected to one end of the first horizontal plate and a second vertical plate connected to the other end of the first horizontal plate, the second support part comprises a third vertical plate connected to one side of the first horizontal plate and a second horizontal plate connected to the top of the third vertical plate, and a plurality of structure weakening holes are arranged at intervals at the joint of the first horizontal plate and the third vertical plate; the bottom of the first vertical plate and the second vertical plate is mounted on a front protection horizontal beam, and the side, away from the third vertical plate, of the second horizontal plate is mounted on a front end frame of the car. In the process of collision between a pedestrian and a vehicle, the application can effectively absorb the collision energy of lower legs, play a buffering role, reduce the leg acceleration of the pedestrian and reduce the injury value of the legs.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of automobiles, and particularly relates to a support structure beneficial to leg protection of a pedestrian and an automobile. BACKGROUND

[0002] With the rapid economic development, the number of automobiles has increased rapidly in recent years. However, the continuous increase in the number of motor vehicles means that more and more people will be injured or killed in traffic accidents. Therefore, the requirements for the protection of both the passengers in the vehicle and the pedestrians outside the vehicle are becoming higher and higher. According to statistics, in the collision between a pedestrian and a vehicle, the head injury leads to the highest probability of serious injury or death of the pedestrian. However, in most cases, the legs are the most vulnerable parts. According to a survey in Japan, in non-fatal traffic accidents between a car and a pedestrian, leg injuries account for 40%. The injuries to the legs mainly include tibial fractures, ligament tears, and knee injuries. Although these injuries are not directly related to the death of the pedestrian, they still cause long-term or permanent disability to the pedestrian, bringing a lot of inconvenience to the life of the victim. Therefore, how to reduce the injuries to the legs and knees of the pedestrian during the collision between the car and the pedestrian is of great significance to reducing the loss of the accident and the suffering of the victim.

[0003] With the implementation of the 2021 version of C-NCAP, the new leg type aPLI is used to evaluate the protection of the legs of the pedestrian. Compared with the original leg type FLEX-PLI, the new leg type aPLI increases the upper body module SUBP to simulate the movement relationship of the human body, which can better simulate the movement posture of the pedestrian during the collision process. The weight is also increased compared with the original leg type FLEX-PLI. The new leg type aPLI has more stringent requirements for pedestrian protection, which puts higher requirements on the overall styling and leg energy absorption space. For cars with a front edge of the hood lower than 850mm and some SUV models, the front edge of the hood is lower than the upper body module SUBP in the Z direction. During the collision process, the 11.3kg upper body module SUBP is not blocked by any structure, and the leg type collides with the vehicle structure, causing the pedestrian thigh bending moment to exceed the standard.

[0004] During the collision between the pedestrian's legs and the vehicle, in order to reduce the injuries to the pedestrian's legs, it is necessary to select reasonable structures in the limited space to change the stiffness of the front part of the vehicle structure, to ensure the balance of the stiffness of the front part of the vehicle structure, and to leave a certain gap between the rear hard points to absorb the energy during the collision and reduce the injuries to the lower legs. However, due to the increase in the length of the vehicle, it is too great an impact on the process and production line, so it is impossible to increase the collision space without limit to meet the space requirements of the lower legs of the pedestrian. Therefore, under the requirement of the front suspension, in order to meet the more stringent requirements of the leg injury value of the pedestrian protection, it is necessary to increase certain energy-absorbing structures to absorb the energy during the collision of the pedestrian's legs, so as to reduce the injuries to the lower legs of the pedestrian. SUMMARY

[0005] In order to solve the above technical problems, the present application is implemented by the following technical scheme:

[0006] In order to solve the above technical problems, the present application is implemented by the following technical scheme:

[0007] A support structure for protecting legs of pedestrians, comprising a plastic support structure body, the plastic support structure body comprising a first support part and a second support part, the first support part comprising a first horizontal plate, a first vertical plate connected to one end of the first horizontal plate, and a second vertical plate connected to the other end of the first horizontal plate; the second support part comprising a third vertical plate connected to one side of the first horizontal plate, and a second horizontal plate connected to the top of the third vertical plate, a plurality of structure weakening holes being arranged at the joint of the first horizontal plate and the third vertical plate; the bottom of the first vertical plate and the second vertical plate being mounted on a front beam, and the side of the second horizontal plate away from the third vertical plate being mounted on a front frame of a vehicle.

[0008] Further, the bottom of the first vertical plate and the second vertical plate is connected with a first connecting lug plate, and the first connecting lug plate is connected with the front beam.

[0009] Further, the first connecting lug plate is provided with a mounting hole, and the first connecting lug plate is connected with the front beam by a bolt passing through the mounting hole.

[0010] Further, the side of the second horizontal plate away from the third vertical plate is connected with a second connecting lug plate, and the second connecting lug plate is connected with the front frame of the vehicle.

[0011] Further, the second connecting lug plate is provided with a mounting hole, and the second connecting lug plate is connected with the front frame of the vehicle by a bolt passing through the mounting hole.

[0012] Further, the first horizontal plate, the first vertical plate and the second vertical plate are integrally formed.

[0013] Further, the first horizontal plate and the third vertical plate are integrally formed.

[0014] Further, the plastic support structure body is a plastic part.

[0015] A vehicle comprising the support structure for protecting legs of pedestrians.

[0016] Compared with the prior art, the present application has at least the following beneficial effects:

[0017] The application provides a support structure for protecting legs of pedestrians, which is installed at a front end of a vehicle, and when a leg of a pedestrian collides with the vehicle, the support structure is deformed by being pressed with the front bumper skin of the vehicle body, thereby playing a role of partially buffering and absorbing energy. Since a plurality of structure weakening holes are arranged at intervals at a joint of a first horizontal plate and a third vertical plate of the support structure, the support structure is gradually crushed under stress, thereby absorbing energy in a collision process, reducing an impact speed, and reducing kinetic energy when a leg collides with a hood, so that a bending moment of a femur of the leg can be effectively reduced, and the purpose of protecting lower legs of pedestrians can be achieved.

[0018] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 It is an isometric view of the support structure for protecting legs of pedestrians according to the present application.

[0021] Figure 2 It is a front view of the support structure for protecting legs of pedestrians according to the present application.

[0022] Figure 3 It is a top view of the support structure for protecting legs of pedestrians according to the present application.

[0023] Figure 4 It is an isometric view of the whole vehicle installation structure of the support structure for protecting legs of pedestrians according to the present application.

[0024] Figure 5 It is a side view of the bolt installation structure of the support structure for protecting legs of pedestrians according to the present application.

[0025] Figure 6 It is a top view of the buckle installation structure of the support structure for protecting legs of pedestrians according to the present application.

[0026] Figure 7 It is a schematic diagram of aPLI leg collision simulation of the support structure for protecting legs of pedestrians according to the present application.

[0027] Figure 8A support structure for protecting legs of a pedestrian and a FLEX PLI legform impact simulation diagram.

[0028] Figure 9 A support structure for protecting legs of a pedestrian and a TRL legform impact simulation diagram.

[0029] In the figure: 1-plastic support structure body; 11-first support part; 110-first horizontal plate; 111-first vertical plate; 112-second vertical plate; 113-first connecting ear plate; 12-second support part; 120-third vertical plate; 121-second horizontal plate; 122-second connecting ear plate; 2-front protection cross beam; 3-structure weakening hole; 4-automobile front end frame; 5-aPLI legform; 6-FLEX PLI legform; 7-TRL legform. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] As a specific embodiment of the present application, in combination with Figure 1 , Figure 2 and Figure 3 , a support structure for protecting legs of a pedestrian includes a plastic support structure body 1, and the plastic support structure body 1 includes a first support part 11 and a second support part 12. The first support part 11 includes a first horizontal plate 110, a first vertical plate 111 and a second vertical plate 112, the first vertical plate 111 is connected to one end of the first horizontal plate 110, and the second vertical plate 112 is connected to the other end of the first horizontal plate 110; the second support part 12 includes a third vertical plate 120 and a second horizontal plate 121, the bottom of the third vertical plate 120 is connected to one side of the first horizontal plate 110, and one side of the second horizontal plate 121 is connected to the top of the third vertical plate 120, and the cross section of the first horizontal plate 110, the third vertical plate 120 and the second horizontal plate 121 after connection is similar to a Z-shaped letter. Figure 4 , Figure 5 and Figure 6 , the bottom of the first vertical plate 111 and the second vertical plate 112 is mounted on the front protection cross beam 2, and one side of the second horizontal plate 121 away from the third vertical plate 120 is mounted on the automobile front end frame 4. A plurality of structure weakening holes 3 are arranged at intervals at the joint of the first horizontal plate 110 and the third vertical plate 120.

[0032] Specifically, the plastic supporting structure body 1 is installed between the front beam 2 and the front frame 4 of the vehicle, and in the process of the pedestrian colliding with the vehicle, the supporting structure body 1 is deformed by the leg extrusion, absorbs the impact energy of the leg, and reduces the damage to the thigh in the process of the collision, and at the same time, meets the requirements of three leg types of global regulations. In order to ensure the protection function of the pedestrian by the supporting structure, a plurality of structure weakening holes 3 are arranged at the joint of the first horizontal plate 110 and the third vertical plate 120, and the arrangement of the structure weakening holes reduces the strength of the supporting structure, and at the same time, increases the energy absorbed in the process of the leg colliding with the vehicle. At the same time, the present application has good protection effect for the low-speed collision of more stringent insurance requirements, and in the process of low-speed collision, the present application can also play a role in buffering and absorbing energy, reducing vehicle damage and reducing maintenance. The structure of the present application can also effectively prevent the sagging of the front bumper.

[0033] In the embodiment, as shown in Figure 1 four structure weakening holes 3 are arranged at the joint of the first horizontal plate 110 and the third vertical plate 120. Preferably, the plastic supporting structure body 1 is a plastic part.

[0034] On the basis of the above-mentioned embodiment, as a more preferred embodiment, in combination with Figures 1 to 6 the first connecting lug plate 113 is connected with the front beam 2, that is, the first vertical plate 111 and the second vertical plate 112 are installed on the front beam 2 through the first connecting lug plate 113. Preferably, the first connecting lug plate 113 is provided with a mounting hole, and the first connecting lug plate 113 is connected with the front beam 2 through the mounting hole by a bolt.

[0035] On the basis of the above-mentioned embodiment, as a more preferred embodiment, in combination with Figures 1 to 6 the second connecting lug plate 122 is connected with the front frame 4 of the vehicle. That is, the second horizontal plate 121 is installed on the front frame 4 of the vehicle through the second connecting lug plate 122. Preferably, the second connecting lug plate 122 is provided with a mounting hole, and the second connecting lug plate 122 is connected with the front frame 4 of the vehicle through the mounting hole by a bolt.

[0036] In the above-mentioned embodiment, as an example, four second connecting lug plates 122 are arranged at the side of the second horizontal plate 121 away from the third vertical plate 120, to ensure the stability of the installation, and to reduce the risk of sagging of the front bumper to a certain extent.

[0037] Preferably, the first horizontal plate 110 is integrally formed with the first vertical plate 111 and the second vertical plate 112, and the first horizontal plate 110 is integrally formed with the third vertical plate 120.

[0038] The support structure for protecting legs of a pedestrian in the present application is beneficial for the pedestrian, and the collision simulation process is shown in Figure 7 、 Figure 8 and Figure 9 The energy-absorbing structure designed in the present application is installed on the front beam and the front frame of the vehicle, and in the process of collision between the pedestrian and the vehicle, the present application is deformed by the extrusion of the legs, absorbs the impact energy of the legs, reduces the damage to the thighs in the process of collision, and can effectively absorb the energy in the process of low-speed collision, plays a buffering and energy-absorbing role, reduces the damage degree of the hood assembly in the process of collision, and reduces the maintenance cost.

[0039] The present application also provides a vehicle, which comprises the support structure for protecting legs of a pedestrian provided above, and the safety performance is better improved.

[0040] Finally, it should be noted that: the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit it, the protection scope of the present application is not limited to this, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: any person skilled in the art in the technical range disclosed by the present application, still can modify or easily think of the change of the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications, changes or replacements do not make the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the embodiments of the present application, and all should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A support structure for facilitating leg protection for a pedestrian, characterized by, The support structure comprises a plastic support structure body (1), the plastic support structure body (1) is a plastic part, the plastic support structure body (1) comprises a first support part (11) and a second support part (12), the first support part (11) comprises a first horizontal plate (110), a first vertical plate (111) connected to one end of the first horizontal plate (110) and a second vertical plate (112) connected to the other end of the first horizontal plate (110), the first horizontal plate (110) is integrally formed with the first vertical plate (111) and the second vertical plate (112); the second support part (12) comprises a third vertical plate (120) connected to one side of the first horizontal plate (110) and a second horizontal plate (121) connected to the top of the third vertical plate (120), the first horizontal plate (110) is integrally formed with the third vertical plate (120), and a plurality of structure weakening holes (3) are arranged at the joint of the first horizontal plate (110) and the third vertical plate (120); the bottom of the first vertical plate (111) and the second vertical plate (112) is connected with a first connecting ear plate (113), and the first connecting ear plate (113) is connected with a front beam (2); the side, away from the third vertical plate (120), of the second horizontal plate (121) is connected with a second connecting ear plate (122), and the second connecting ear plate (122) is connected with a front frame (4) of an automobile.

2. The support structure of claim 1, wherein, A mounting hole is arranged on the first connecting ear plate (113), and a bolt is used to pass through the mounting hole to connect the first connecting ear plate (113) with the front beam (2).

3. The support structure of claim 1, wherein, A mounting hole is arranged on the second connecting ear plate (122), and a bolt is used to pass through the mounting hole to connect the second connecting ear plate (122) with the front frame (4) of the automobile.

4. An automobile characterized by comprising: The support structure comprises a plastic support structure body (1), the plastic support structure body (1) is a plastic part, the plastic support structure body (1) comprises a first support part (11) and a second support part (12), the first support part (11) comprises a first horizontal plate (110), a first vertical plate (111) connected to one end of the first horizontal plate (110) and a second vertical plate (112) connected to the other end of the first horizontal plate (110), the first horizontal plate (110) is integrally formed with the first vertical plate (111) and the second vertical plate (112); the second support part (12) comprises a third vertical plate (120) connected to one side of the first horizontal plate (110) and a second horizontal plate (121) connected to the top of the third vertical plate (120), the first horizontal plate (110) is integrally formed with the third vertical plate (120), and a plurality of structure weakening holes (3) are arranged at the joint of the first horizontal plate (110) and the third vertical plate (120); the bottom of the first vertical plate (111) and the second vertical plate (112) is connected with a first connecting ear plate (113), and the first connecting ear plate (113) is connected with a front beam (2); the side, away from the third vertical plate (120), of the second horizontal plate (121) is connected with a second connecting ear plate (122), and the second connecting ear plate (122) is connected with a front frame (4) of an automobile.

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