What does the front calf protection crossbeam mean
Front calf protection beam , also known as pedestrian protection anti-collision beam or anti-pedestrian entrapment device, is a structure designed under the front bumper of a vehicle to protect pedestrians, especially their legs, in the event of a collision with the vehicle. The main purpose of this design is to reduce the risk of injury to pedestrians in the event of a collision with a car and to prevent pedestrians from being drawn under .
Design and Function
The front lower leg protection crossbeam is usually located beneath the front anti-collision beam and is designed with the protection needs of pedestrians in mind. When a car collides with a pedestrian, the calf protection crossbeam will first touch the pedestrian's leg at a lower position. By "lifting" the pedestrian, it guides the pedestrian to move up and down, and eventually land on the hood or the front windshield. This approach not only increases the collision contact area between pedestrians and vehicles, but also reduces injury to pedestrians and reduces the risk of pedestrians being rolled under .
Historical background and design concept
With the development of automotive technology and the improvement of safety awareness, automotive design no longer merely focuses on the safety of passengers inside the vehicle, but also begins to pay attention to the protection of pedestrians outside the vehicle. The design of the calf protection crossbeam is precisely a concrete manifestation of this safety concept.
The main function of the front calf protection beam is to protect the legs of pedestrians and reduce the injury caused by collision to pedestrians . When a vehicle collides with a pedestrian, the calf protection beam will first touch the pedestrian's leg at a lower position than the front anti-collision beam, which helps to "lift" the pedestrian and guide the pedestrian to move up and backward, thereby increasing the collision contact area between the pedestrian and the vehicle, reducing injury to the pedestrian and reducing the risk of the pedestrian being drawn under .
In addition, the design of the lower leg protection crossbeam also takes lightweight applications into account. Through CAE simulation optimization technology, a lightweight plastic pedestrian lower leg protection crossbeam was designed. This design not only reduces calf injury for pedestrians, but also serves as a structural reinforcement in high-speed and low-speed frontal collisions of automobiles, improving vehicle collision safety performance .
The design principle of the calf protection crossbeam is that through its lower position and specific structure, it can effectively guide the legs of pedestrians during a collision, reducing the direct impact and injury to the legs of pedestrians. This design is gaining more and more attention in automotive safety standards, although it is not standard in all vehicles, its presence is significant in enhancing vehicle protection for pedestrians .
Youdaoplaceholder0 The working principle of the front calf protection beam (pedestrian protection anti-collision beam) mainly includes the following aspects:
Youdaoplaceholder0 Design purpose : The main purpose of the front calf protection beam is to protect pedestrians in the event of a collision between a vehicle and a pedestrian. When a vehicle collides with a pedestrian, usually the vehicle body touches the pedestrian's leg directly, which can cause injury to the pedestrian's leg or even being drawn under the vehicle, resulting in serious consequences .
Therefore, the design of the calf protection crossbeam is intended to reduce this kind of injury.
Youdaoplaceholder0 Working principle : When a vehicle collides with a pedestrian, the calf protection beam first touches the pedestrian's leg at a lower position than the front anti-collision beam. This design helps to "shovel up" the pedestrian, guide the pedestrian to move up and backward, increase the collision contact area between the pedestrian and the vehicle, thereby reducing injury to the pedestrian and reducing the risk of pedestrian being drawn under . In addition, the design of the lower leg protection crossbeam can also change the orientation of the human body, the bottom support strengthened will increase the contact area of the front bumper to reverse the human body in the correct direction .
Youdaoplaceholder0 Structural type : There are various designs for the calf protection crossbeam, including steel, non-metallic (such as plastic), and equivalent pedestrian leg protection designs. These design approaches can all provide the same protective effect, but they differ in cost and material selection. For example, although metal and non-metal structures have good effects, they are relatively costly. The design method of reinforcing the lower guard plate of the structure is more economical and effective .
Youdaoplaceholder0 Application scenarios : The calf protection crossbeam is mainly used in the front design of vehicles, especially under the bumper. It 's not STRONG, but SIGNIFICANT, can work with the front bumper .
In addition, the design focuses particularly on the safety of children, reducing the risk of children being drawn under a vehicle in the event of a collision .
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