A kind of anti-explosive occupant leg protection device for military vehicles

Abstract

The invention discloses an anti-explosion occupant leg protection device for a military vehicle. Including hollow energy-absorbing upper and lower panels, hollow support plate, concave hexagonal negative Poisson's ratio sandwich layer. The hollow energy-absorbing upper and lower panels include rectangular and circular hollow structures, fixed on the concave hexagonal negative Poisson's ratio sandwich layer; the hollow support plate includes a rectangular hollow structure, fixed on the hollow energy-absorbing upper panel and the hollow energy-absorbing lower panel Between; the concave hexagonal negative Poisson's ratio sandwich layer consists of four layers, and the thickness increases sequentially from the first layer to the fourth layer; the hollow energy-absorbing upper panel is placed under the human foot, and the hollow energy-absorbing lower panel is placed on the vehicle floor. When the explosion impact of the present invention is transmitted to the hollow energy-absorbing lower panel, the energy-absorbing effect is achieved through the deformation of the upper and lower panels and the concave hexagonal negative Poisson’s ratio sandwich layer, thereby dispersing the energy; the hollow support plates on the left and right sides are inclined inward to make The angle between the occupant's legs and the vertical is changed, thereby changing the direction in which the occupant's legs are impacted by the floor.

Description

technical field [0001] The invention belongs to the field of anti-explosion impact of vehicles, in particular to an anti-explosion occupant leg protection device for military vehicles. Background technique [0002] In modern battlefields, asymmetric operations often occur, such as the Iraq war. As roadside bombs and improvised explosive devices (Improved Explosive Devices, IEDs) often encountered in asymmetric warfare, the number of casualties caused by the coalition forces accounted for 30% of the total casualties. 67%, which shows the degree to which weapons such as improvised explosive devices pose a threat to the safety of soldiers. The strong impact generated during the explosion will cause obvious elastic-plastic deformation and damage to the vehicle floor and body. serious injury. Therefore, it is necessary to protect vehicle occupants from landmines or improvised explosives. [0003] The legs are one of the most commonly injured body areas for occupants in underbo...

AI Technical Summary

Problems solved by technology

There are still several deficiencies in this device: the first point is that the inside of the cuboid is a hollow structure, which collapses too quickly when it is impacted, and there is no energy-absorbing device inside; the second point is that the left and right support plates and the upper and lower panels are integrated structures, and The left and right support plates have the same thickness, which is not conducive to the protection of the occupant's legs under the impact of the explosion

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