The invention relates to a device for suspension of a lamp in a vehicle, and a vehicle comprising such a lamp suspension device.
During a collision of a vehicle with a pedestrian, the pedestrian often collides with the head on the hood and/or the fender of the vehicle. Further, any lamp arranged in the front of the vehicle may constitute a relative hard structure. To mitigate injuries to pedestrians, vehicles are usually adapted to yield in response to forces generated by a pedestrian impact. For example, the vehicle may be equipped with a pedestrian air bag or a device for changing the inclination angle of the hood, etc.
An objective of the invention is to provide a device for suspension of a lamp in a vehicle, which device will reduce pedestrian injuries in case of a head impact to the lamp.
The objective is achieved by a device for suspension of a lamp in a vehicle, which device comprises a guiding means for guiding the lamp to move relative to the vehicle from a first position to a second position in case of an impact between the lamp and an object, and at least one energy absorber for counteracting movement of the lamp from the first position to the second position, wherein the guiding means is arranged for guiding the lamp to move inwardly in a movement direction having a movement direction component in parallel with the X-axis while the movement of the lamp being counteracted by one said energy absorber, and to pivot about an axis being transverse relative to the X-axis and the Z-axis, while the pivot motion being counteracted by one said energy absorber, giving the lamp a different orientation in the second position in comparison to the first position.
The invention is based on the insight that by such a device, energy can be absorbed during the impact even if the space close to the lamp is limited, particularly for a lamp mounted on a position in the hood and/or the front wheel fender area where the lamp has a major part of an exterior surface facing upwardly with a surface normal having a major direction component in parallel with the Z-axis. If the space available for movement of the lamp in the Z-direction is limited, energy can be absorbed by the movement in the X-direction and the pivot motion. This in turn will improve the pedestrian safety in case of an impact.
The directions and axes used herein, i.e. the X-axis, Y-axis and the Z-axis, constitute a cartesian coordinate system arranged relative to a vehicle such that the X-axis is in parallel with the horizontal longitudinal extension of the vehicle, the Y-axis is in parallel with the horizontal lateral extension of the vehicle, thus being perpendicular to the X-axis, and the Z-axis is in parallel with a vertical extension of the vehicle, thus being perpendicular to the X-axis and the Y-axis.
According to one embodiment, the guiding means is arranged for guiding the lamp such that said movement direction has a movement direction component in parallel to the Z-axis. Hereby, the energy absorption can be further improved in case there is a space available for movement of the lamp in the Z-direction.
According to another embodiment, the pivot axis is substantially perpendicular to the X-axis, and preferably the pivot axis is substantially perpendicular to the Z-axis. Hereby, the energy absorption can be further improved since the orientation of the pivot axis relative to an impact direction is often favourable.
According to a further embodiment, the guiding means comprises a first guide rail mechanism arranged for connecting a front end of the lamp to the vehicle and a second guide rail mechanism arranged for connecting a rear end of the lamp to the vehicle. Herby, the movement and the pivot motion of the lamp can be achieved, for example by guiding the lamp in the movement direction by means of the first guide rail mechanism and guiding the lamp to pivot by means of the second guide rail mechanism.
According to a further embodiment, the first guide rail mechanism comprises a first guide portion for guiding the lamp in said movement direction having a movement direction component in parallel with the X-axis and a movement direction component in parallel with the Z-axis, and a second guide portion for subsequently guiding the lamp in said movement direction being substantially in parallel with the X-axis. Hereby, the space available for movement of the lamp can be efficiently used for energy absorption if the space available in the X-direction is larger than the space available in the Z-direction.
According to a further embodiment, the guiding means comprises a pivot arm for guiding the lamp to pivot about the pivot axis, and preferably the pivot arm comprises a first arm unit and a second arm unit, a first end of the first arm unit being pivotally connectable to the vehicle, a second end of the first arm unit and a first end of the second arm unit being pivotally connected to each other, the second arm unit constituting a guide rail mechanism for guiding the lamp to move from a second end of the second arm unit towards the first end of the second arm unit. Hereby, a translation motion of the lamp can be used for achieving a pivot motion of the lamp.
According to another aspect of the invention, a further objective is to provide a vehicle, which vehicle will reduce pedestrian injuries in case of a head impact to a vehicle lamp. This objective is achieved by a vehicle provided with a device according to the invention.
The advantages of the vehicle are the same as the advantages already discussed hereinabove with reference to the embodiments of the device.
Further advantages and advantageous features of the invention are disclosed in the following description and in the dependent claims.
With reference to the appended drawings, below follows a more detailed description of embodiments of the invention cited as examples.
In the drawings:
As can be seen in
For example, the exterior surface 5 of the lamp can be inclined relative to the X-axis with an angle α selected in the range 0≤α<45°, preferably 0≤α≤30°, and relative to the Y-axis with an angle β selected in the range 0≤β<45°, preferably 0≤β≤30°. If the exterior surface of the lamp 2 is inclined relative to the X-axis, preferably the rear part of the exterior surface of the lamp is arranged at a higher level than the front part of the exterior surface of the lamp 2, and if the exterior surface of the lamp 2 is inclined relative to the Y-axis, preferably the inner part of the exterior surface of the lamp 2 is arranged at a higher level than the outer part of the exterior surface of the lamp 2.
Although the exterior surface of the lamp does not need to be horizontal, preferably the projected surface of the lamp seen in a direction in parallel with the Z-axis has however a considerable area that could be subject to an impact with an object.
Further, the lamp 2 is suitably arranged such that an exterior surface 5 of the lamp is substantially flush with an exterior surface of the hood 3 and the front wheel fender 4 of the vehicle 1.
The lamp 2 is suspended in the vehicle 1 by means of a vehicle lamp suspension device 7 that will be described in detail hereinbelow.
The guiding means 8 is arranged for guiding the lamp to move inwardly in a movement direction 10 having a movement direction component in parallel with the X-axis while the movement of the lamp being counteracted by one said energy absorber, and to pivot about an axis being transverse relative to the X-axis and the Z-axis, while the pivot motion being counteracted by one said energy absorber, giving the lamp a different orientation in the second position in comparison to the first position. The pivot axis is a geometrical axis that can be situated on the lamp or at a distance from the lamp.
The expression “movement direction” used herein refers to the resulting translation motion direction, whereas “movement direction component” is a component contributing to the “movement direction”.
By “transverse” is meant a direction that can deviate from a direction perpendicular to the X-axis and Z-axis. The deviation can be within ±30°, preferably ±20° and often within ±10° from a direction perpendicular to the current axis.
The guiding means is suitably arranged for guiding the lamp to move such that the movement direction component in parallel with the X-axis is considerably larger than any movement direction component in parallel with the Y-axis, and preferably the guiding means is arranged for guiding the lamp to move such that the movement direction is substantially in the XZ-plane.
In the example embodiment illustrated in
As an example, the guiding means can comprise two said first guide rail mechanisms arranged spaced apart from each other in the pivot axis direction, and one said second guide rail mechanism.
30 The second guide rail mechanism 22 is arranged for guiding the lamp 2 to move inwardly and downwardly in a movement direction 24 having a movement direction component 25 in parallel with the X-axis and a movement direction component 26 in parallel with the Z-axis. In case of an impact, the lamp will move inwards and pivot because the rear end of the lamp is moved downwards with the movement direction component 26. Here, the geometrical pivot axis 33 is substantially perpendicular to the X-axis and the Z-axis, i.e. the pivot axis extends substantially in parallel with the Y-axis.
Thus, in the example embodiment illustrated in
Each said guide rail mechanism 20, 22 may comprise a flange unit 27, 28 having a slot 29, 30 for receiving a pin 31, 32. The slot is arranged for guiding the pin for achieving the desired translation motion and pivot motion of the lamp 2. Although each flange unit 27, 28 is suitably adapted to be attached to the vehicle 1 and receive the pin 31, 32 which is arranged on the lamp, it would also be possible to instead arrange the pin to be fixed relative to the vehicle and arrange the slot in the lamp.
Since the pivot axis 33 of the lamp 2 is the centre of the pin 31, the pivot axis 33 will move with the translation motion in the movement direction 10.
In the example embodiment illustrated in
With reference to
Although an energy absorber in form of a spring arranged such as the first and second energy absorbers 9a, 9b in
One or more energy absorbers can be used. The energy absorber can be any kind of metal spring, foam, plastic component, etc., that preferably has a non-linear spring constant. By such an energy absorber having a spring constant that increases with the movement of the lamp from the first position towards the second position, energy can be absorbed in an efficient way. For example, a spring can have a non-linear spring constant increasing with increased compression of the spring.
Further, the lamp suspension device or any other part of the vehicle may comprise an attachment component for mechanical connection of the lamp to the vehicle. Such an attachment component can be used for connecting the lamp to the vehicle and keeping the lamp in an intended position, for example the first position mentioned above, in absence of any impact. In such a case, the lamp is releasable from this connection to the vehicle in case of an impact. The lamp has preferably a break off feature withstanding static loads. For example, such an attachment component can be broken in case of an impact and thereafter the movement of the lamp during impact is mainly determined by the guiding means and the energy absorber. Optionally, the guiding means can be used also for connecting the lamp to the vehicle and keeping the lamp in the intended first position.
As illustrated in
As illustrated in
15
In the example embodiment illustrated in
With reference to
Further, in addition to the energy absorbers 9a′, 9b′ arranged at the first and second guide rail mechanisms, an energy absorber 51 for counteracting the pivot motion between the first arm unit 52 and the second arm unit 53 of the pivot arm 50 is arranged at the pivot axis 59. This is schematically illustrated by a spring 51 that is arranged to extend between the first arm unit 52 and the second arm unit 53 of the pivot arm 50.
It is to be understood that the present invention is not limited to the embodiments described above and illustrated in the drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the appended claims.
Number | Date | Country | Kind |
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17208551.6 | Dec 2017 | EP | regional |
This application is a continuation of International Application No. PCT/CN2018/116708, filed Nov. 21, 2018, which claims the benefit of European Application No. 17208551.6, filed Dec. 19, 2017, the disclosures of which are incorporated herein by reference in their entireties.
Number | Date | Country | |
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Parent | PCT/CN2018/116708 | Nov 2018 | US |
Child | 16886010 | US |