Pedestrian leg buffer beam of automobile bumper

Abstract

The invention provides a pedestrian leg buffer beam of an automobile bumper. One end of the buffer beam is connected with the bumper, and the other end is connected with a front end skeleton of a automobile body. Along the direction from the bumper to the automobile body, the pedestrian leg buffer beam comprises a primary energy absorption area and a secondary energy absorption area which are adjacently connected with each other, wherein the primary energy absorption area is higher than the secondary energy absorption area in the vertical direction. The rigidity of the pedestrian leg buffer beam of an automobile bumper is easily controlled, so that the injury on pedestrian legs is reduced during impact, and the production cost and the maintenance cost are lower.

Description

technical field [0001] The invention belongs to the technical field of automobile manufacturing, and in particular relates to a pedestrian calf anti-collision beam of an automobile bumper. Background technique [0002] With the development of automobile technology and the improvement of people's safety awareness, the protection of automobiles is no longer limited to the protection of passengers in the car, but has been extended to pedestrians who collide with the car. When a car collides with pedestrians, usually the body directly Contact with the pedestrian's calf, thus directly causing injury to the pedestrian's calf, is difficult to meet the requirements of the national standard GB / T 24550-2009. [0003] The bumper system of prior art is divided into following situations: [0004] (1) No pedestrian calf anti-collision beam structure, the disadvantage is that when a vehicle collides with a pedestrian, the calf will have a large bending angle, which will increase the injur...

AI Technical Summary

Problems solved by technology

[0004] (1) No pedestrian calf anti-collision beam structure, the disadvantage is that when the vehicle collides with the pedestrian, the calf will have a large bending angle, which will increase the pedestrian calf injury value

[0005] (2) The calf anti-collision beam is a slender and thin-walled sheet metal structure. The disadvantage is that when the vehicle collides with the pedestrian's calf, the calf anti-collision beam of the sheet metal structure will produce large plastic deformation and cannot be recovered, so it needs to be replaced This part, resulting in an increase in part cost

However, the existing plastic calf anti-collision beam does not fully consider the impact of its structure on the stiffness of the calf anti-collision beam and the impact on the pedestrian's calf injury value, and only has a first-level energy-absorbing area. When the protection test is required, it is relatively difficult to adjust the stiffness, which may lead to difficulties in mold modification, or even re-opening the mold, which greatly increases the production cost and product development cycle

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