A lightning protection lower limb protection device for vehicle occupants

Abstract

The present invention belongs to the field of vehicles, and specifically relates to a lightning protection lower limb protection device for vehicle occupants. It includes an upper plate of a lower limb protection device, a main support plate, a secondary support plate and a lower plate of a lower limb protection device; the lower surface of the upper plate of the lower limb protection device is evenly distributed with a plurality of parallel slots; the main support plate includes two parts with an angle of 120°, wherein the width of the wide plate is equal to the width of the secondary support plate, one end of the main support plate and the secondary support plate is fixedly connected to the lower plate of the lower limb protection device, and the intersection of the two parts of the secondary support plate and the main support plate is fixedly connected to form an equilateral triangle, forming an energy absorbing subunit, and a plurality of energy absorbing subunits are arranged adjacently and in parallel; the narrow plate of each main support plate is connected to the upper plate of the lower limb protection device by being inserted into the slot of the upper plate of the lower limb protection device. The present application adopts an energy absorbing subunit formed by the main support plate, the secondary support plate and the upper plate of the lower limb protection device with the slot, which changes the posture of the occupant's calf after being impacted by an explosion, thereby reducing the injury to the occupant.

Description

Technical Field

[0001] The invention belongs to the field of armored vehicles, and in particular relates to a mine protection lower limb protection device for vehicle occupants. Background Art

[0002] At the moment of mine explosion, the impact force is immediately applied to the feet through the vehicle body, and then quickly transmitted to the calves and thighs. Currently, 90% of vehicles fail to pass explosion resistance tests due to foot problems. As far as light vehicle design is concerned, the primary protection structure cannot resist explosions, so a secondary protection structure is required to isolate the impact and reduce lower limb injuries; and it is impossible to design footrests to isolate the impact, so a series of measures need to be taken to reduce leg injuries; in addition, since the vehicle is light and close to the explosion point, a dedicated isolation system is required; in addition, the posture of the occupants has a certain impact on the injury.

[0003] In the face of the above situation, foreign countries have developed different protective floors and foot pads, which are mainly divided into two categories: suspension type and rubber isolation type. The suspension type reduces the damage caused by explosion impact by not contacting the ground, while the rubber isolation type reduces the damage caused by explosion impact by using rubber. However, the suspension type protective floor occupies a large space vertically and has a complex structure, and the rubber isolation type protective floor is prone to aging and has large vibration and noise.

[0004] As for protective foot pads, both at home and abroad, the main method is to reduce the damage caused by explosion impact by structural energy absorption. In recent years, studies have found that changing the posture of the lower limb can also reduce the damage caused by explosion impact. The literature "Grigoriadis G, Carpanen D, Webster C, et al. The effect of the posture of the lower limb in anti-vehicular explosions [J]. proceeding: International Research Council on Biomechanics of Injury. Antwerp, Belgium, 2017" is published. However, in actual applications, it is unrealistic and difficult to let members actively maintain a certain posture. There is no device in the prior art for reducing damage by changing the posture of the lower limb during an explosion. Summary of the invention

[0005] The purpose of the present invention is to provide a lightning protection lower limb protection device for vehicle occupants.

[0006] The technical solution to achieve the purpose of the present invention is: a vehicle occupant lightning protection lower limb protection device, comprising a lower limb protection device upper plate, a plurality of main support plates, auxiliary support plates with the same number as the main support plates, and a lower limb protection device lower plate;

[0007] The strength of the auxiliary support plate is less than that of the main support plate;

[0008] The lower surface of the upper plate of the lower limb protection device is uniformly provided with a plurality of parallel slots;

[0009] The main support plate includes two parts, and the angle between the two parts is 120°. One of the two parts is a wide plate and the other is a narrow plate. The width of the wide plate is equal to the width of the auxiliary support plate. One end of the main support plate and the auxiliary support plate are fixedly connected to the lower plate of the lower limb protection device, and the intersection of the auxiliary support plate and the main support plate is fixedly connected. The wide plate part of the main support plate, the auxiliary support plate and the lower plate of the lower limb protection device between the main support plate and the auxiliary support plate form an equilateral triangle to form an energy absorbing sub-unit, and multiple energy absorbing sub-units are arranged adjacent to each other in parallel; the narrow plate of each main support plate is connected to the upper plate of the lower limb protection device by snapping into the slot of the upper plate of the lower limb protection device.

[0010] Furthermore, a slot is formed on the lower surface of the upper plate of the lower limb protection device by setting an L-shaped plate, one end of the short side of the L-shaped plate is fixedly connected to the upper plate of the lower limb protection device, and the long side is set parallel to the upper plate of the lower limb protection device to form a slot.

[0011] Furthermore, the device is arranged below the footsteps of the occupant, the main support plate in each energy absorbing subunit is placed on a side close to the occupant, and the secondary support plate is placed on a side away from the occupant.

[0012] Furthermore, it also includes a shock-absorbing pad, which is arranged above the upper plate of the lower limb protection device; the material of the shock-absorbing pad is EPP material with gradient density, and the bottom density of the shock-absorbing pad is higher than the density of the upper part; the shock-absorbing pad is provided with a plurality of convex strips parallel to the length direction of the energy-absorbing subunit, which are used to increase the friction with the sole of the occupant.

[0013] Furthermore, the shock-absorbing pad is glued to the upper plate of the lower limb protection device.

[0014] Furthermore, one end of the main support plate and the auxiliary support plate are welded to the lower plate of the lower limb protection device, and the intersection of the auxiliary support plate and the main support plate is welded.

[0015] Furthermore, the size of the device is set according to the space for the occupants, and the length of the device is 550mm to 650mm, the width is 450mm to 550mm, and the height is 80mm to 100mm.

[0016] Furthermore, the lower plate of the lower limb protection device is in direct contact with the ground, which supports the lightning protection lower limb protection device and enhances its energy absorption effect.

[0017] Compared with the prior art, the present invention has the following significant advantages:

[0018] 1. The present application adopts an energy-absorbing sub-unit formed by a main support plate, a secondary support plate and an upper plate of a lower limb protection device with a slot. Since the strength of the secondary support plate of the energy-absorbing sub-unit is lower than that of the main support plate, after being impacted by an explosion, the secondary support plate bends first, and the main support plate tilts to push the shock-absorbing pad forward, thereby changing the posture of the occupant's calves and reducing the injuries to the occupants. The main and secondary support plates of the present application have the function of supporting the upper plate and have a certain energy-absorbing effect.

[0019] 2. There are raised horizontal bars on the top of the shock-absorbing pad to increase its friction with the sole. The material used is gradient density EPP material. The density at the bottom is higher than that at the top. The high-density EPP material at the bottom can fully absorb energy, and the low-density EPP material at the top can play a secondary buffering role.

[0020] 3. The size of the shock-absorbing pad is set according to the space for the rear passengers and is suitable for situations where the space for the rear passengers is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the lower limb protection device of the present invention.

[0022] Figure 2 It is a top view of the lower limb protection device of the present invention.

[0023] Figure 3 It is a front view of the lower limb protection device of the present invention.

[0024] Figure 4 The figure is a schematic diagram of the installation of the main and auxiliary support plates of the lower limb protection device of the present invention.

[0025] Description of reference numerals:

[0026] 1- shock-absorbing pad, 2- upper plate of lower limb protection device, 3- main support plate, 4- auxiliary support plate, 5- lower plate of lower limb protection device. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1-4 As shown, a mine protection lower limb protection device for military vehicles can reduce calf force and effectively reduce occupant injuries by buffering the impact from the floor, dispersing the explosion energy, and changing the calf posture of the occupant.

[0029] The protective device is composed of a shock absorbing pad 1, an upper plate 2 of a lower limb protective device, a main support plate 3, an auxiliary support plate 4 and a lower plate 5 of a lower limb protective device. The main support plate 3 and the auxiliary support plate 4 are connected to the lower plate 5 of the lower limb protective device by welding, the upper plate 2 of the lower limb protective device is connected to the main support plate 3 by a slot, and the shock absorbing pad 1 is glued to the upper plate 2 of the lower limb protective device.

[0030] The size of the shock-absorbing pad 1 is set according to the space for the rear passengers, with a length of 550 mm to 650 mm, a width of 450 mm to 550 mm, and a thickness of 5 mm to 15 mm.

[0031] The upper part of the shock-absorbing pad 1 is provided with raised horizontal strips, which can increase the friction between the shock-absorbing pad 1 and the sole.

[0032] The material used for the shock-absorbing pad 1 is EPP material (Expanded polypropylene: polypropylene plastic foam material) with gradient density. The density of the bottom is higher than that of the upper part. The high-density EPP material at the bottom can fully absorb energy, and the low-density EPP material at the upper part can play a buffering role.

[0033] The shock-absorbing pad 1 is glued to the upper part of the upper plate 2 of the lower limb protection device, and the lower part of the upper plate 2 of the lower limb protection device is connected with L-shaped slots distributed at equal intervals for fixing the curved part of the main support plate.

[0034] The main body of the main support plate 3 and the auxiliary support plate 4 are welded together with an angle of 60 degrees. The bent part of the main support plate 3 is inserted into the L-shaped slot. This structure can support the upper plate 2 of the lower limb protection device and improve the energy absorption effect of the foot pad.

[0035] The strength of the secondary support plate 4 is lower than that of the main support plate 3. After being impacted by the explosion, the secondary support plate 4 bends first, and the main support plate 3 tilts to push the lightning protection shock-absorbing pad forward through the slot structure, thereby driving the shock-absorbing pad 1 forward. The shock-absorbing pad 1 changes the posture of the calf through friction, thereby reducing the damage to the occupant.

[0036] The lower plate 5 of the lower limb protection device is welded to the main support plate 3 and the auxiliary support plate 4 to form an equilateral triangle, which can provide a good supporting effect on the upper plate of the lower limb protection device.

[0037] The shock-absorbing pad 1 is glued to the upper plate 2 of the lower limb protection device, and the main support plate 3 and the auxiliary support plate 4 are connected to the upper plate of the lower limb protection device through a slot, thereby improving the energy absorption effect of the foot pad.

[0038] The strength of the auxiliary support plate 4 is lower than that of the main support plate 3. After being impacted by the explosion, the auxiliary support plate 4 buckles first, and the main support plate tilts to push the lightning protection and shock absorbing pad forward.

[0039] The lower plate 5 of the lower limb protection device is welded to the main support plate 3 and the auxiliary support plate 4.

Claims

1. A vehicle occupant lightning protection lower limb protection device, characterized in that: It comprises an upper plate (2) of a lower limb protection device, a plurality of main support plates (3), auxiliary support plates (4) having the same number as the main support plates, and a lower plate (5) of the lower limb protection device; The strength of the auxiliary support plate (4) is smaller than the strength of the main support plate (3); The lower surface of the upper plate (2) of the lower limb protection device is evenly distributed with a plurality of parallel slots; The main support plate (3) comprises two parts, the angle between the two parts is 120 degrees, one of the two parts is a wide plate and the other is a narrow plate, the width of the wide plate is equal to the width of the auxiliary support plate (4), one end of the main support plate (3) and the auxiliary support plate (4) are fixedly connected to the lower plate (5) of the lower limb protection device, the intersection of the auxiliary support plate (4) and the main support plate is fixedly connected, the wide plate part of the main support plate (3) and the auxiliary support plate (4) and the lower plate of the lower limb protection device between the main support plate and the auxiliary support plate form an equilateral triangle, forming an energy absorbing subunit, and a plurality of energy absorbing subunits are arranged adjacently and in parallel; the narrow plate of each main support plate (3) is connected to the upper plate (2) of the lower limb protection device by being inserted into a slot of the upper plate (2) of the lower limb protection device.

2. The device according to claim 1, characterized in that The lower surface of the upper plate (2) of the lower limb protection device forms a slot by arranging an L-shaped plate, one end of the short side of the L-shaped plate is fixedly connected to the upper plate (2) of the lower limb protection device, and the long side is arranged parallel to the upper plate (2) of the lower limb protection device to form a slot.

3. The device according to claim 2, characterized in that The device is arranged under the feet of the occupant, the main support plate (3) in each energy absorbing subunit is placed on a side close to the occupant, and the secondary support plate (4) is placed on a side away from the occupant.

4. The device according to claim 3, characterized in that It also comprises a shock-absorbing pad (1) arranged above the upper plate (2) of the lower limb protection device; the shock-absorbing pad (1) is made of EPP material with gradient density, and the density of the bottom of the shock-absorbing pad (1) is higher than the density of the upper part; the shock-absorbing pad (1) is provided with a plurality of convex strips parallel to the length direction of the energy-absorbing subunit, so as to increase the friction with the sole of the occupant's shoe.

5. The device according to claim 4, characterized in that The shock-absorbing pad (1) is glued to the upper plate (2) of the lower limb protection device.

6. The device according to claim 1, characterized in that One end of the main support plate (3) and the auxiliary support plate (4) are welded to the lower plate (5) of the lower limb protection device, and the intersection of the auxiliary support plate (4) and the main support plate is welded.

7. The device according to claim 6, characterized in that The size of the device is set according to the space for the occupants. The length of the device is 550mm-650mm, the width is 450mm-550mm, and the height is 80mm-100mm.

8. The device according to claim 7, characterized in that The lower plate (5) of the lower limb protection device is in direct contact with the ground, which supports the lightning protection lower limb protection device and enhances its energy absorption effect.

Images