EP3977039B1 - Blast wave energy absorption device and vehicle equipped with such a device - Google Patents

Description

The invention relates to an energy absorption device for protecting a vehicle element, in particular a vehicle element of a military vehicle, from a detonation effect, comprising a first fastening element which can be connected to a vehicle chassis or a vehicle tub and a second fastening element which can be connected to the vehicle element to be protected, wherein At least two webs are arranged between the first and the second fastening element.

Furthermore, the application relates to a vehicle with such an energy absorption device.

From the DE 10 2010 052 151 A1 a cabin for a construction vehicle is known which has at least one hydraulically damped rubber bearing means and at least one roll stabilizing means in the rear area of the cabin. This results in improved spring comfort in the cabin during faster transport journeys. In principle, however, the suspensions of construction machinery cabins pursue completely different objectives - they do not offer any protection against detonations - than the suspensions of military vehicles, so they are not comparable.

From the DE 10 2007 002 576 A1 a decoupled pedal unit with a foot plate of a military vehicle is known.

Suspensions of vehicle elements of military vehicles, for example, are out DE 10 2008 053 152 A1 as well as the WO 2014/048420 A1 known. These publications each show deformation means that support a vehicle element. The deformation means are designed to be deformed in the event of a mine impact and to absorb energy, so that the mine impact cannot be transmitted directly to the vehicle element. Both those Fastening means and the webs are not provided in a common plane, but are intended to move past each other during deformation. The ones from the DE 10 2008 053 152 A1 and the WO 2014/048420 A1 The deformation devices disclosed in these publications are relatively large and do not adequately solve the conflict of objectives between elastic storage and energy absorption in the event of plastic deformation.

The FR 2 901 750 already describes a device for protecting a vehicle seat against detonations according to the generic term.

Based on this, the invention is based on the object of creating an energy absorption device for a vehicle, in particular a military vehicle, which is small in size and solves this conflict of objectives.

This task is solved by the energy absorption device of claim 1. Advantageous refinements and further developments are the subject of the respective subclaims.

According to the invention, an energy absorption device is provided for protecting a vehicle element, in particular a military vehicle, from a detonation effect. The energy absorption device includes a first fastening element that is connectable to a vehicle chassis or a vehicle tub and a second fastening element that is connectable to the vehicle element to be protected. At least two webs are arranged between the first and second fastening elements. The at least two webs are arranged in such a way that they lie one above the other in a common plane.

Furthermore, according to the invention, a vehicle, in particular a military vehicle, is provided, comprising such an energy absorption device or as described below and a vehicle element, the vehicle element being connected to the vehicle via the energy absorption device.

The vehicle can be, for example, a wheeled or tracked vehicle. The tracked vehicle can be, for example, a recovery vehicle, an engineer tank, a mine clearing vehicle, an armored personnel carrier or a main battle tank. The wheeled vehicle can be, for example, a heavy truck, a tractor-trailer, a crane or a wheeled tank.

The energy absorption device according to the invention creates a small-sized energy absorption device which, on the one hand, provides elastic support for the vehicle element that can be connected to it and, at the same time, can absorb high energy in the form of deformation work in the event of a detonation.

The vehicle element that is connected to the energy absorption device can be, for example, a cabin or a shelter of a vehicle. In particular, the cabin can be a protected cabin. Likewise, the vehicle element can be a structure, a platform, a floor, a vibrating floor, an intermediate floor, a floor plate or a component of one of the aforementioned elements.

Furthermore, the vehicle element can be a base plate, a seat device, a weapon system, a device holder, a shelf or a component of one of the aforementioned elements.

The energy absorption device according to the invention protects the vehicle element from a detonation effect, such as can be caused, for example, by a mine or a booby trap.

The energy absorption device according to the invention makes it possible for it to be plastically deformed in a controlled manner in the event of a detonation and for the vehicle element that can be connected to it not to be damaged.

It can preferably be provided that the webs have at least one deformation zone.

The at least one deformation zone is a zone in which the webs deform plastically when they are deflected to a correspondingly strong extent. This happens due to the design of the energy absorption device, which requires that the webs first deform in the deformation zones.

Furthermore, it can be provided that the webs in the deformation zones are weakened by the choice of material or geometry in such a way that they deform first in the deformation zones.

Furthermore, it can be provided that the first fastening element, the second fastening element, the at least two webs and the at least one deformation zone are arranged such that they lie one above the other in the plane that is perpendicular to the first and the second fastening element.

The fastening elements and the webs of the energy absorption device are arranged in an accordion-like manner in a common plane, so that a small energy absorption device is created.

In a further development of the energy absorption device, it can be provided that the webs are designed to be flexible, so that the energy absorption device resiliently supports the vehicle element.

This ensures that the energy absorption device allows elastic mounting of the vehicle element as long as the deflection does not become too large. Thus, in normal driving situations of the vehicle, storage of the vehicle element can take place, whereas energy absorption is realized through plastic deformation to protect against a detonation effect.

According to one embodiment, it is provided that flexurally stiffened transition zones are formed between the fastening devices and the respective adjacent webs.

By designing the flexurally stiff, in particular essentially flexurally rigid, transition zones, it is achieved that the webs of the energy absorption device do not simply bend or break off, but rather a defined deformation is achieved in the area of the transition deformation zones of the webs.

Furthermore, in a further development it can be provided that transition deformation zones are formed adjacent to the flexurally stiffened transition zones.

Furthermore, according to one embodiment, it is provided that bend-stiffened, in particular substantially bend-resistant, corners are formed between the webs.

This ensures that the webs and not the corners undergo deformation. Furthermore, it is ensured that the energy absorption device does not simply bend or collapse in the corners and that the webs are prevented from lying on a block. The webs can therefore be subjected to specific bending loads. In addition, it is ensured in this way that a plastic deformation of a deformation zone of the web is possible, which is subordinate to an elastic deformation of a web in the spring travel. This ensures that both sufficient elastic suspension and plastic deformation are possible.

In an embodiment it can also be provided that the deformation zones are formed adjacent to the bending-stiffened corners.

Furthermore, it can be provided that the deformation zones from the second fastening element towards the first fastening element are at least partially designed to be more difficult to deform than the previous deformation zones, so that the energy absorption device has a progressive deformation characteristic.

This specifically influences the deformation sequence so that the deformation zones are deformed in a defined order.

Furthermore, it can be provided that the thickness of the webs increases from the second fastening element towards the first fastening element, so that the energy absorption device has a progressive spring characteristic.

This ensures that the elastic deformability of the webs is designed differently and the spring characteristic of the energy absorption device can be influenced in a targeted manner.

Alternatively, the spring characteristic can be degressive.

Furthermore, it can be provided that the webs are arranged in a zigzag manner in an alternating direction.

This creates a particularly space-saving energy absorption device.

In an embodiment of the energy absorption device, it can be provided that inner radii between the webs are formed in rigid corners and/or inner radii in the transition zones.

By forming inner radii, notch stresses are specifically induced in the deformation zones. The notch stress that occurs can be influenced by the size of the radius of the inner radii, so that the size of the notch stress and also the limit at which the deformation occurs can be adjusted by the radius.

According to the invention, the inner radii between the webs in rigid corners and/or the inner radii in the transition deformation zones from the second fastening element to the first fastening element become larger.

As a result, the deformation sequence is set specifically so that a deformation from the second fastening element to the first fastening element occurs gradually.

This ensures that the notch stresses within the deformation zones are highest directly on the first fastening element and the deformation also occurs first in the vicinity of the chassis.

As an alternative to the above-mentioned sequence, it is also possible for the inner radii between the webs in rigid corners and/or the inner radii in the transition zones from the first fastening element to the second fastening element to become larger. This ensures that the notch stresses within the deformation zones are highest directly on the second fastening element and the deformation occurs first in the vicinity of the vehicle element.

The invention will be explained below using exemplary embodiments with reference to the drawings.

Fig. 1

eine schematische Darstellung eines ersten erfindungsgemäßen Fahrzeugs mit zumindest einer erfindungsgemäßen Deformationsvorrichtung;

Fig. 2

eine schematische Darstellung eines zweiten erfindungsgemäßen Fahrzeugs mit zumindest einer erfindungsgemäßen Deformationsvorrichtung;

Fig. 3

eine schematische Darstellung eines dritten erfindungsgemäßen Fahrzeugs mit zumindest einer erfindungsgemäßen Deformationsvorrichtung;

Fig. 4a

eine schematische Darstellung einer erfindungsgemäßen Energieabsorbtionsvorrichtung in einer Ausgangsstellung;

Fig. 4b

eine schematische Darstellung der erfindungsgemäßen Energieabsorbtionsvorrichtung in einer Ausgangsstellung mit Kenntlichmachung der Ebene E;

Fig. 5

eine schematische Darstellung der erfindungsgemäßen Energieabsorbtionsvorrichtung in einer Zwischenstellung; und

Fig. 6

eine schematische Darstellung der erfindungsgemäßen Energieabsorbtionsvorrichtung in einer deformierten Stellung.

Show it:

Fig. 1

a schematic representation of a first vehicle according to the invention with at least one deformation device according to the invention;

Fig. 2

a schematic representation of a second vehicle according to the invention with at least one deformation device according to the invention;

Fig. 3

a schematic representation of a third vehicle according to the invention with at least one deformation device according to the invention;

Fig. 4a

a schematic representation of an energy absorption device according to the invention in an initial position;

Fig. 4b

a schematic representation of the energy absorption device according to the invention in a starting position with plane E identified;

Fig. 5

a schematic representation of the energy absorption device according to the invention in an intermediate position; and

Fig. 6

a schematic representation of the energy absorption device according to the invention in a deformed position.

Fig. 1 shows a first vehicle 1 according to the invention with a vehicle chassis 2. A vehicle element 10 is formed on the vehicle chassis 2. The vehicle 1 is preferably a military vehicle. The vehicle element 10 can be, for example, a cabin, a driver's cab, a platform, a structure or similar act. At least one energy absorption device 100, which supports the vehicle element 10 on the vehicle 1, is arranged between the vehicle element 10 and the vehicle chassis 2.

The energy absorption device 100 serves to protect the vehicle element 10 from a detonation effect and is described in more detail in the 4a to 6 shown. The energy absorption device 100 according to 4a to 6 can be found in all vehicles Fig. 1 to 3 .

Fig. 2 shows a second vehicle 1′ according to the invention, which essentially corresponds to the first vehicle 1, with the difference that the vehicle element 10′ is a floor or intermediate floor. The vehicle element 10′ is mounted on the vehicle chassis 2 of the vehicle 1 by means of at least one energy absorption device 100. The vehicle element 10' is arranged within a cabin or a driver's cab.

Fig. 3 shows a third vehicle 1" according to the invention with a vehicle tub 2'. A vehicle element 10" is mounted within the vehicle tub 2' by means of at least one energy absorption device 100. The vehicle element 10" can be, for example, a vehicle interior or a protective space. Deviating from this Fig. 3 The vehicle element 10" can also be a floor or intermediate floor.

According to Fig. 3 the vehicle element 10″ is connected to the vehicle tub 2′ by several energy absorption devices 100 and is stored within it.

Fig. 4a shows a schematic representation of an energy absorption device 100 according to the invention in a starting position, i.e. a position in which the energy absorption device 100 is not deformed.

The energy absorption device 100 includes a first fastening element 110, which can be connected to the vehicle chassis 2 or the vehicle tub 2 'of the vehicle 1. The first fastening element 110 is designed as a plate or sheet metal and is connected to the vehicle chassis 2 or the vehicle tub 2 'in the installed state.

Furthermore, the energy absorption device 100 includes a second fastening element 120, which can be connected to the vehicle element 10 to be protected. The second fastening element 110 is preferably also designed as a plate or sheet metal and is connected to the vehicle element 10 in the installed state.

The wall thickness and the dimensions of the first fastening element 110 and the second fastening element 120 can be adapted to the geometry of the energy absorption device 100 in different ways. Like in the Fig. 1 shown, the first fastening element 110 can have a smaller wall thickness and be wider than the second fastening element 120.

At least two webs 130, 140, 150, 160 are arranged between the first and second fastening elements 110, 120. In design can as in Fig. 4a four webs 130, 140, 150, 160 are shown.

As in Fig. 4a and Fig 4b can be seen, the first fastening element 110, the second fastening element 120, the webs 130, 140, 150, 160 and the deformation zones 172, 174, 182, 184, 192, 194 are arranged such that they are one above the other in a common plane E are arranged, the common plane E being perpendicular to the two fastening elements 110, 120.

The webs 130, 140, 150, 160 are alternately arranged one above the other in a zigzag manner in different directions. In other words, the webs 130, 140, 150, 160 are arranged one above the other in an accordion-like manner.

In order to achieve resilient mounting of the vehicle element 10 by the energy absorption device 100, the webs 130, 140, 150, 160 are each designed to be flexible.

The length of the webs 130, 140, 150, 160 can differ from one another, so that, for example, a first web 130 and a fourth web 160, which are connected to the fastening elements 110, 120, are shorter than a second web 140 and third web 150.

The different lengths of the webs 130, 140, 150, 160 ensure that they can deflect elastically to different degrees and result in a defined bending pattern of the energy absorption device 100 in the event of an elastic deformation. Such a bending figure as a result of an elastic deformation is, for example, in Fig. 5 shown.

Bending-stiffened corners 170, 180, 190 are formed between the webs 130, 140, 150, 160. The bend-stiffened corners 170, 180, 190 are designed in such a way that they essentially do not bend and ensure that when the webs 130, 140, 150, 160 are elastically deformed, the bend-stiffened corners 170, 180, 190 ensure that the Webs 130, 140, 150, 160 cannot be folded together due to deformation of the corners 170, 180, 190. This ensures that, in addition to elastic deformation in the event of a With greater deflection, plastic deformation of the deformation zones 172, 174, 182, 184, 192, 194 can take place.

As in Fig.4a shown, the webs 130, 140, 150, 160 each have at least one deformation zone 172, 174, 182, 184, 192, 194. The deformation zones 172, 174, 182, 184, 192, 194 are each formed adjacent to the bend-stiffened corners 170, 180, 190.

Between the fastening devices 110, 120 and the respective adjacent webs 130, 160, flexurally stiffened transition zones 112, 122 are formed. These have a comparable effect to the bend-stiffened corners 170, 180, 190.

The transition deformation zones 115, 125 are formed adjacent to the flexurally stiffened transition zones 112, 122.

Like in the Fig.4a shown, inner radii R2, R3, R4 are formed between the webs 130, 140, 150, 160 in the deformation zones 172, 174, 182, 184, 192, 194 and/or inner radii R1, R5 in the transition zones 112, 122.

According to Fig. 4a are the inner radii R2, R3, R4, which are formed between the webs 130, 140, 150, 160 in the rigid corners 170, 180, 190, increasing from the second fastening element 120 to the first fastening element 110.

In an embodiment, a fourth radius R4 between the third web 150 and fourth web 160 is largest. A third radius R3 between the second web 140 and the third web 150 is smaller than the fourth radius (R3<R4). A second radius R2 between the first web 130 and the second web 140 is smaller than the third radius R3. The following mathematical relationship applies to the radii R2 to R4: R2<R3<R4.

The inner radii R1, R5 in the transition zones 112, 122 are according to Fig. 4a preferably of the same size. Like from the Fig. 4a As can be seen, the radii R1 and R5 are both smaller than the radius R2. The following mathematical relationship applies to the radii R1 to R5: R1=R5<R2<R3<R4.

The thickness t1, t2, t3, t4 of the webs 130, 140, 150, 160 can be made larger from the second fastening element 120 towards the first fastening element 110, so that the energy absorption device 100 has a progressive spring characteristic. The following mathematical relationship applies to the thicknesses t1 to t4: t1<t2<t3<t4.

Fig. 4b clearly illustrates the location of level E again, with level E marked by hatching. Like from the Fig. 4b can be seen, the plane E lies perpendicular to the first and second fastening elements 110, 120. The first fastening element 110, the second fastening element 120, the at least two webs 130, 140, 150, 160 and the at least one deformation zone 172, 174, 182, 184, 192, 194 are arranged in such a way that they lie one above the other in plane E.

Fig. 5 shows a schematic representation of the energy absorption device 100 according to the invention in an intermediate position in which the energy absorption device 100 is elastically deformed. The rigid corners 170, 180, 190 are essentially undeformed in this intermediate position and the webs 130, 140, 150, 160 are elastically deformed. Fig. 5 shows the energy absorption device 100 in an elastically compressed state.

Fig. 6 shows a schematic representation of the energy absorption device 100 according to the invention in a deformed position in which the energy absorption device 100 is plastically deformed.

The deformation zones 172, 174, 182, 184, 192, 194 are designed to be at least partially more difficult to deform from the second fastening element 120 to the first fastening element 110 than the previous deformation zones 172, 174, 182, 184, 192, 194, so that the energy absorption device 100 is a has progressive deformation characteristic. In addition, a deformation sequence of the deformation zones of the energy absorption device 100 is specified by the different degrees of deformation.

Insofar as the above disclosure relates to an energy absorption device 100 as such, it also applies to a vehicle with such an energy absorption device 100 as disclosed.

REFERENCE SYMBOL LIST

1

first vehicle

1'

second vehicle

1"

third vehicle

2

Vehicle chassis

2'

vehicle tub

10

Vehicle element

10'

Vehicle element

10"

Vehicle element

100

Energy absorption device

110

first fastener

112

first transition zone

115

first transition deformation zone

120

second fastener

122

second transition zone

125

second transition deformation zone

130

first bridge

140

second bridge

150

third bridge

160

fourth bridge

170

first deformation zone

180

second deformation zone

190

third deformation zone

R1

first radius

R2

second radius

R3

third radius

R4

fourth radius

R5

fifth radius

E

level

t1

Thickness of the first bar

t2

Thickness of the second bar

t3

Thickness of the third bar

t4

Thickness of the fourth bar

Claims (11)

1. Energy absorption device (100) for protecting a vehicle element (10, 10', 10"), in particular a military vehicle (1, 1', 1"), from a detonation impact, comprising a first securing element (110) which can be connected to a vehicle chassis (2) and/or a vehicle cradle (2), and comprising a second securing element (120) which can be connected to the vehicle element (10, 10', 10") to be protected,

   at least two connecting pieces (130, 140, 150, 160) being arranged between the first and the second securing element (110, 120),

   the at least two connecting pieces (130, 140, 150, 160) being arranged such that they lie one above the other in a common plane (E),

   characterized in that

   flexurally rigid corners (170, 180, 190) are formed in each case between the connecting pieces (130, 140, 150, 160), inner radii (R₂, R₃, R₄) becoming greater between the connecting pieces (130, 140, 150, 160) in the flexurally rigid corners (170, 180, 190) from the second securing element (120) toward the first securing element (110); and/or

   in that flexurally rigid transition zones (112, 122) are formed between the securing elements (110, 120) and each of the adjacent connecting pieces (130, 160), inner radii (R₁, R₅) becoming greater in the transition zones (112, 122) from the second securing element (120) toward the first securing element (110).
2. Energy absorption device (100) according to claim 1,
   characterized in that the connecting pieces (130, 140, 150, 160) have at least one deformation zone (172, 174, 182, 184, 192, 194).
3. Energy absorption device (100) according to claim 2,
   characterized in that the first securing element (110), the second securing element (120), the at least two connecting pieces (130, 140, 150, 160) and the at least one deformation zone (172, 174, 182, 184, 192, 194) are arranged such that they lie one above the other in the plane (E) which is perpendicular to the first and the second securing element (110, 120).
4. Energy absorption device (100) according to any of the preceding claims, characterized in that the connecting pieces (130, 140, 150, 160) are flexurally elastic.
5. Energy absorption device (100) according to any of claims 1 to 4, characterized in that transition deformation zones (115, 125) are adjacent to the flexurally rigid transition zones (112, 122).
6. Energy absorption device (100) according to claim 2 or claim 3 as well as according to claim 4 or claim 5 when referring back to claim 2 or claim 3, characterized in that the deformation zones (172, 174, 182, 184, 192, 194) are adjacent to the flexurally rigid corners (170, 180, 190).
7. Energy absorption device (100) according to any of claims 2, 3 or 6 as well as according to claim 4 or claim 5 when referring back to claim 2 or claim 3, characterized in that the deformation zones (172, 174, 182, 184, 192, 194) are designed to be at least partly more difficult to deform from the second securing element (120) toward the first securing element (110) than the preceding deformation zones (172, 174, 182, 184, 192, 194) so that the energy absorption device (100) has a progressive deformation characteristic curve.
8. Energy absorption device (100) according to any of the preceding claims, characterized in that a thickness (t₁, t₂, t₃, t₄) of the connecting pieces (130, 140, 150, 160) is greater from the second securing element (120) toward the first securing element (110) so that the energy absorption device (100) has a progressive spring characteristic curve.
9. Energy absorption device (100) according to any of the preceding claims, characterized in that the connecting pieces (130, 140, 150, 160) are arranged in an alternating direction in a sawtooth-like manner.
10. Vehicle (1, 1', 1") comprising an energy absorption device (100) according to any of claims 1-9 and a vehicle element (10, 10', 10"), wherein the vehicle element (10, 10', 10") is connected to the vehicle (1, 1', 1") via the energy absorption device (100).
11. Vehicle (1, 1', 1") according to claim 10, wherein the vehicle element (10, 10', 10") is a cabin, in particular a vehicle cabin, a floor, an intermediate floor, a structure, a foot plate, a seat apparatus, a weapon installation, an appliance holder or a shelf.

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