DE102009040406A1 - Vehicle safety device for lifting component of body shell of vehicle by actuator, comprises hinge portion, and another hinge portion, which is stored tiltable on former hinge portion - Google Patents

Abstract

The vehicle safety device comprises a hinge portion, and another hinge portion, which is stored tiltable on the former hinge portion. The support of the latter hinge portion is arranged at the former hinge portion with a support connecting rod (34). The hinge portion is fixed at the component of the body shell of the vehicle.

Description

The invention relates to a vehicle safety device for raising or raising a component of the outer skin of the associated vehicle by means of an actuator having a first hinge part and a second hinge part pivotally mounted on this first hinge part. Furthermore, the invention relates to a vehicle with such a vehicle safety device.

In the structural design and layout of modern vehicles, in particular automobiles, great importance is attached to the fact that in the event of an accident, a person hitting the outer skin of the vehicle remains as unhurt as possible. A particular danger is in such an accident, the impact of the person with his head on the outer skin of the vehicle involved in the accident. This danger, for example, when a pedestrian, a cyclist or motorcyclist is detected by a vehicle and the head of the accident participant against The hood of the accident vehicle is thrown.

In modern vehicles there is just under the hood to an underlying drive unit, such as an internal combustion engine, not enough space for a sufficiently large deformation of the hood. Rather, there is the risk that an impacting head "strikes" the drive unit and thereby experiences a high biomechanical load.

As a possibility of improved personal protection, it is known to raise the hood or front door of a vehicle by several centimeters, as soon as an accident is detected with a possible collision. By raising the hood of the distance is increased to an underlying drive unit and also generated by the additional movement of the hood and the associated spring forces and inertia energy reduction over a relatively large way. The level of deceleration thus achieved for an impacting person's head thus drops to a biomechanically more tolerable value, and a "strike-through" to a highly rigid drive unit located under the engine hood in the front of the vehicle is prevented.

In the case that the movable component of the outer skin is an engine hood, this is firmly clamped in the known vehicles in the closed state with a hinge and a striker on the vehicle. When lifting or showing the hood in an accident by the above actuator can act on the striker very high forces, causing it can be deformed.

Furthermore, in known systems for lifting a hood in an accident, the problem that when shooting up the hood this swinging up to 25 mm, as the hood simply wants to fly on because of their inertia.

The invention has for its object to provide a vehicle with a vehicle safety device in which the above-mentioned disadvantages are overcome and in particular a bending of the striker on the vehicle during lifting of the component of the outer skin is cost-effectively avoided.

The object is achieved according to the invention with a vehicle safety device according to claim 1. Furthermore, the object is achieved with a vehicle according to claim 10. Advantageous developments of the solution according to the invention are described in the dependent claims.

According to the invention, a vehicle safety device is provided for lifting a component of the outer skin of the associated vehicle by means of an actuator, having a first hinge part and a second hinge part mounted pivotably on this first hinge part. The storage of the second hinge part is designed on the first hinge part with a bearing slot and a bearing pin arranged displaceably therein.

According to the invention, a bearing or a bearing between two relevant hinge parts of the hinge on the component to be lifted is designed with a bearing slot in which a bearing pin can move along a limited distance. Now slides the bearing pin, which may be designed in particular as a rivet, in the bearing guide along so it is a total movement of the component on this limited distance possible and the associated striker otherwise occurring clamping forces can be avoided. This reduces the load on the striker and prevents it from bending. During the longitudinal movement of the bearing pin in the bearing block this can rotate at the same time. The displacement and rotation is not detrimental, but can, as will be explained in more detail below, be used to advantage.

The mentioned bearing block is designed particularly advantageous as a simple slot. This can be produced very inexpensively. In the slot of the associated bearing pin can be guided well on the side and thus the necessary rigidity of the overall system can be ensured.

In a first advantageous development of the vehicle safety device according to the invention, the first hinge part is fixedly attached to the component to be lifted of the outer skin of the associated vehicle. The first hinge part is one of two hinge parts with which the hinge upper part of a four-bar linkage is formed. As such, the four-bar linkage forms a conventional hinge arrangement for front flaps. In this case, two differently long arms are pivotally mounted on a hinge base, which carry the hinge upper part. On the hinge upper part, the front flap or hood is attached so that it can be opened to open. The hinge shell is, as already mentioned, designed in two parts, wherein a lower hinge upper part is articulated to the handlebars and an upper hinge upper part is connected to the front flap. The upper hinge upper part can in turn be pivoted on the lower hinge upper part, wherein this pivoting movement is carried out only when the front flap is lifted by the actuator. In normal operation of the vehicle, however, the upper hinge upper part is held stationary on the lower hinge upper part.

In a second advantageous development of the vehicle safety device according to the invention, a guide slot is provided on one of the hinge parts, in which a guide pin of the other hinge part is displaceably arranged and whose shape is designed such that when pivoting the two hinge parts relative to each other of the bearing pin in the bearing slot shifts.

The guide slot forms a guideway, which imposes on the associated component to be lifted a forced movement that does not coincide with a conventional circular path around the associated bearing pin. Instead, the component is superimposed by means of the backdrop, a longitudinal movement of the bearing pin in the bearing block. Thus, the gate moves the front flap in the direction of the bearing slot and thereby in particular also on the striker leads to a compensating movement, which prevents deformation of the striker.

In a third advantageous embodiment of the vehicle safety device according to the invention, the guide slot is designed with a circular path whose center is arranged eccentrically to the center of the bearing pin.

The scenery itself still has the shape of a circular path, so that they can be easily made and the guide pin can be performed on her without a risk of jamming, but the circular path is eccentric to the position of the bearing pin. As a result, the desired displacement of the bearing pin in the bearing block is achieved in a simple and cost-effective manner.

In a fourth advantageous embodiment of the vehicle safety device according to the invention, the guide slot is designed at least partially deformable.

The deformability of the guide slot results in the displacement of the component in the direction of the bearing block to a certain positive deformation, can be reduced by the kinetic energy or is. This degradation of kinetic energy results in particular due to the leadership of the guide pin on the guide slot and the simultaneous guidance of the bearing pin on the bearing block.

On both scenes there is friction and possibly also deformations, which convert the kinetic energy and degrade.

In a fifth advantageous embodiment of the vehicle safety device according to the invention, the arrangement of guide slot and guide pin is designed such that the guide pin is subjected to at least at a portion of this increased friction when moving on the guide slot.

The increased friction can advantageously be generated by a bottleneck on the guide slot or a bulge to be overcome by the guide pin. Alternatively or additionally, the guide slot can be shaped such that, in interaction with the guidance of the bearing pin on the bearing block, a pressurization or pressing of the guide pin results against the guide slot. With this pressure increased sliding friction can be generated or a plastic or elastic deformation of the guide slot can be provoked. The movement in the or the backdrops so dampens the vibrations and thus reduces the risk that just at the moment of an otherwise occurring overshoot the front door a head impact of an accident occurs. In addition, a flutter of the front door is prevented during excavation.

In a sixth advantageous development of the vehicle safety device according to the invention, a travel limit for the pivotal movement of the two hinge parts relative to one another is designed with the guide slot and the guide pin displaceably arranged therein.

The guide link can for this purpose have a path, at which when the two hinge parts of the guide pins pivoting apart apart from the said friction At the end of this free path then a stop is provided, which establishes said path limit. With the path limitation, the maximum excavation travel of the component to be lifted is defined in a cost-effective manner at the same time.

In a seventh advantageous development of the vehicle safety device according to the invention, the arrangement of bearing guide and bearing pin is designed such that the bearing pin is subjected to at least at a portion of this increased friction when moving on the bearing block.

The increased friction can be advantageously generated by a narrowing at the slot. If the bearing pin moves in the slot, friction can be selectively generated on its side walls. This is particularly easy by means of a narrowing of the slot possible. It can then be used to reduce the kinetic energy generated when lifting the component both the sliding friction and the Drehreibung of the bearing pin. In this way, a swinging and overshoot of the component can be prevented during its lifting operation. The same applies to the deformation and friction on the guide slot.

In an eighth advantageous development of the vehicle safety device according to the invention, when the outer skin is not raised, the first hinge part is fixedly connected to the second hinge part via a shearing element which can be sheared off when lifting the component of the outer skin.

In this way, a stationary connection between the two hinge parts is designed to ensure during normal operation of the associated vehicle that the component to be lifted is in its intended position and remains there. In the case of an accident with potential personal injury, however, the shearing element can be sheared off by the force of the actuator and in this way in particular the swinging out of the upper hinge upper part on the lower hinge upper part can be generated. It can then move so the hinge parts relative to each other. The shearing element is designed particularly cost-effective and easy to install as Scherniet.

The vehicle according to the invention is advantageously equipped with such a vehicle safety device according to the invention in order to achieve the abovementioned object.

Exemplary embodiments of the solution according to the invention will be explained in more detail below with reference to the attached schematic drawings. It shows.

1 a side view of a first embodiment of a vehicle safety device according to the invention in the non-raised state,

2 the detail II in 1 .

3 the detail III in 1 .

4 went side view according 1 in the raised state

5 the detail V in 4 .

6 the detail VI in 4 .

7 the detail II in a further embodiment of a vehicle safety device according to the invention and

8th the detail III in a further embodiment of a vehicle safety device according to the invention.

In the 1 to 6 is a vehicle safety device 10 for lifting one only in 1 dashed component shown 12 the outer skin of an associated and not further illustrated vehicle illustrated. The component to be lifted 12 is the front door or bonnet of the vehicle.

The vehicle safety device 10 is with an actor 14 provided on detection of a personal accident on the hood and an associated, possible impact of a person on the hood this from the in 1 to 3 position shown in the in 4 to 6 can lift shown position. The actor 14 accelerates the hood with high kinetic energy, with an actuator temple 16 from an actuator housing 18 is driven out.

The actor 14 is located in the area of a component 12 or the hood on the vehicle hinged hinge 20 , This hinge 20 is as a four-bar linkage with a on (not further illustrated) vehicle chassis fixedly mounted hinge base 22 designed. At the hinge base 22 are a first, short handlebar 24 and a second, longer handlebar 26 hinged pivotally. These handlebars 24 and 26 wear a hinge shell, which consists of a lower hinge shell 28 and an upper hinge shell 30 is formed. The upper hinge shell 30 is on a bearing bolt 32 with an associated bearing block 34 on the lower hinge upper part 28 pivoted.

At the upper hinge upper part 30 is a guide 36 provided, which down from the upper hinge shell 30 protrudes and from a plate with a slot-like guideway formed therein 38 is designed. The guideway 38 is bent in a circle, the center of the circular shape but not with the center of the bearing pin 32 but is eccentric of this lies.

In the guideway 38 slides a guide pin 40 along, which is fixedly attached to the lower hinge shell. The guide pin 40 has two thickenings or heels in its axial direction, between which it on the guideway 38 and thus at the management stage 36 Although displaceable but otherwise held axially.

The guiding scenery 36 is designed substantially O- or U-shaped, with two to the upper hinge upper part 30 subsequent thighs 42 with a floor 44 are connected. These elements of the thighs 42 and the soil 44 Although they are designed essentially rigid, but have a certain flexibility, which allows them to deform elastically to a limited extent.

When lifting the component 12 becomes the upper hinge upper part 30 by means of the actuator 14 from the lower hinge shell 28 pushed away and pivots it around the bearing pin 32 , During this pivoting movement of the guide pin slides 40 in the lead setting 36 along. To the movement in the guidance 36 To be able to perform, must be the guide pin 40 along the guideway 38 and along the thighs 42 move. Because the thighs 42 but not a circular path around the bearing pin 32 but one of them eccentric circular path, the upper hinge shell 30 a movement transverse to the longitudinal direction of the guide slot 36 forced open.

This forced movement can be the upper hinge shell 30 by a movement of the bearing pin 32 in the warehouse setting 34 consequences.

In the thus imposed movement, it comes between the participating components to increased friction. In particular, the guide pin rubs 40 at the management stage 36 and the bearing pin 32 rubs on the bearing block 34 , This friction leads to a degradation of the kinetic energy, which the upper hinge shell 30 from the actor 14 was given. Such energy dissipation is particularly wanted because it also overshoots the associated component 12 prevented.

The degradation of kinetic energy is just at the end of the movement of the component 12 desired. To achieve this is in the embodiment according to 7 the bearing block 34 designed as a slot, which has two indentations at one end 46 with a respective adjacent recess 48 having in the material of the associated hinge part. The indentations 46 need during the movement of the bearing pin 32 along the bearing bracket 34 pushed aside, though by means of the recesses 48 is facilitated, but still targeted to a reduction of kinetic energy of the upper hinge shell 30 leads.

In the embodiment according to 8th is this advantageous principle on the guide slot 36 been applied. It is in the lower part of the guide slot 36 in this on the outwardly facing side of the circular path also a recess 46 with adjacent recess 48 formed in the associated material.

In such a vehicle safety device 10 So is during the pivotal movement of the upper hinge shell 30 at the lower hinge upper part 28 the bearing pin 32 in the bearing slot designed as a slot 34 displaceable with simultaneous reduction of kinetic energy. The displacement is due to the movement of the guide pin 40 at the management stage 36 controlled, in which also targeted kinetic energy is reduced, especially at the end of the pivoting movement.

The floor 44 the guide scenery 36 acts as Wegbegrenzung and also leads by a "catching" and resilient stopping the guide pin 40 to a particularly advantageous deceleration of the component involved 12 ,

When not raised, the top hinge top is 30 however by means of a Scherniet 50 held stationary, so that a desired position of the component 12 is ensured on the associated vehicle. This scherniet 50 is when lifting the component 12 from the actor 14 sheared.

LIST OF REFERENCE NUMBERS

10

Vehicle safety device

12

component

14

actuator

16

Aktorstempel

18

actuator housing

20

hinge

22

Hinge lower

24

short handlebar

26

long handlebar

28

lower hinge top

30

Upper hinge top

32

bearing bolt

34

camp scenery

36

guide link

38

guideway

40

guide pins

42

leg

44

ground

46

indentation

48

recess

50

Scherniet

Claims (10)

Vehicle safety device ( 10 ) for lifting a component ( 12 ) of the outer skin of the associated vehicle by means of an actuator ( 14 ) with a first hinge part ( 30 ) and one on this first hinge part ( 30 ) pivotally mounted second hinge part ( 28 ), characterized in that the mounting of the second hinge part ( 28 ) on the first hinge part ( 30 ) with a bearing guide ( 36 ) and a bearing pin displaceably arranged therein ( 32 ) is designed. Vehicle safety device according to claim 1, characterized in that the first hinge part ( 30 ) on the component to be lifted ( 12 ) of the outer skin of the associated vehicle is fixedly mounted. Vehicle safety device according to claim 1 or 2, characterized in that on one of the hinge parts ( 30 ) a guide ( 36 ) is provided, in which a guide pin ( 40 ) of the other hinge part ( 28 ) are arranged so displaceable and whose shape is designed such that when pivoting the two hinge parts ( 28 ; 30 ) relative to each other of the bearing pin ( 40 ) in the bearing block ( 34 ) shifts. Vehicle safety device according to claim 3, characterized in that the guide slot ( 36 ) is designed with a circular path whose center is eccentric to the center of the bearing pin ( 32 ) is arranged. Vehicle safety device according to claim 3 or 4, characterized in that the guide slot ( 36 ) is designed at least partially deformable. Vehicle safety device according to one of claims 3 to 5, characterized in that the arrangement of guide slot ( 36 ) and guide pins ( 40 ) is designed such that the guide pin ( 40 ) when moving on the guide ( 36 ) at least at one section ( 46 ) is subjected to an increased friction from this. Vehicle safety device according to one of claims 3 to 6, characterized in that with the guide slot ( 36 ) and the guide pin slidably disposed therein ( 40 ) a path limitation ( 44 ) for the pivoting movement of the two hinge parts ( 28 ; 30 ) is designed relative to each other. Vehicle safety device according to one of claims 1 to 7, characterized in that the arrangement of bearing guide ( 34 ) and bearing pins ( 32 ) is designed such that the bearing pin ( 32 ) when moving on the bearing guide ( 34 ) at least at one section ( 46 ) is subjected to an increased friction from this. Vehicle safety device according to one of claims 1 to 8, characterized in that when not raised component ( 12 ) of the outer skin, the first hinge part ( 30 ) with the second hinge part ( 28 ) via a shearing element ( 50 ) is fixedly connected, which during lifting of the component ( 12 ) of the outer skin is sheared off. Vehicle with a vehicle safety device ( 10 ) according to one of claims 1 to 9.

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