EP3593033B1 - Lighting apparatus for vehicles - Google Patents

Lighting apparatus for vehicles Download PDF

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Publication number
EP3593033B1
EP3593033B1 EP18709248.1A EP18709248A EP3593033B1 EP 3593033 B1 EP3593033 B1 EP 3593033B1 EP 18709248 A EP18709248 A EP 18709248A EP 3593033 B1 EP3593033 B1 EP 3593033B1
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EP
European Patent Office
Prior art keywords
light source
reflector
source carrier
optics device
optics
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18709248.1A
Other languages
German (de)
French (fr)
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EP3593033A1 (en
Inventor
Rainer Hess
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hella GmbH and Co KGaA
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Hella GmbH and Co KGaA
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Publication date
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Publication of EP3593033A1 publication Critical patent/EP3593033A1/en
Application granted granted Critical
Publication of EP3593033B1 publication Critical patent/EP3593033B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/39—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/192—Details of lamp holders, terminals or connectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/49—Attachment of the cooling means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/12—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by screwing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/0055—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by screwing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a lighting device for vehicles according to the preamble of patent claim 1.
  • a lighting device for vehicles which comprises a light source device, an optical device and a cooling device.
  • the light source device comprises a flat light source carrier (board) on which a light source is fixed.
  • the light source carrier is connected over a large area to the cooling device, for example by gluing or screwing, so that a light source cooling unit is formed.
  • This structural unit is then connected to the optical device designed as a reflector in a drawer-like manner via a guide.
  • a disadvantage of the known lighting device is that there is a relatively long tolerance chain from the light source carrier via the cooling device to the optics device, which promotes the occurrence of inaccuracies in the position of the light source in relation to the optics device.
  • a lighting device for vehicles with a light source device an optical device and a cooling device is known.
  • a light source carrier of the light source device is mounted on a contact surface of a first leg of the heat sink device.
  • Another leg of the heat sink device is connected to a rear side of a reflector of the optics device.
  • This lighting device also has a relatively long chain of tolerances between the light source carrier and the reflector.
  • a lighting device for vehicles with a light source device an optical device and a cooling device is known.
  • the optics device has, on the one hand, pins and, on the other hand, retaining springs at the top, so that after a light source carrier provided with open recesses of the light source device has been placed on, the light source carrier is positioned on the optics device. After the cooling device is subsequently placed on the structural unit formed from the light source device and the optics device, a clamping fixation takes place by means of a cap-shaped fixing component.
  • a disadvantage of the known lighting device is that the positioning is completed when the light source carrier is placed on the optics unit and readjustment is therefore no longer possible.
  • the object of the present invention is therefore to further develop a lighting device for vehicles in such a way that the positioning accuracy on the light source device relative to the optical device is increased in a simple manner during assembly.
  • the lighting device according to the invention has the features of patent claim 1 .
  • the particular advantage of the invention is that increased positioning accuracy of a light source device relative to an optical device is achieved by reducing a tolerance chain.
  • a light source carrier is fastened in a target adjustment position between a contact surface of the optics device and a contact surface of the cooling device. Before the light source carrier is fixed, it can be aligned or adjusted relative to the optical device. Tolerances of a heat sink device do not have to be taken into account here.
  • a further advantage results from the fact that when the light source device is fastened to the optics device, the cooling device is also fixed at the same time. This can advantageously reduce the assembly work.
  • the light source carrier is held by a screw connection between the cooling device and the optics device. This results in safe assembly and disassembly of the light source device.
  • the spigots of the optics device have an internal thread, so that a shank of a fastening screw can be brought into threaded engagement with the respective spigot. This creates a secure connection between the cooling device and the optics device, with the light source device being adjusted.
  • the cooling device has a receiving recess for the respective spigot of the optics device, with an inside diameter of the receiving recess being larger than an outer diameter of the spigot.
  • the optics device can advantageously be positioned relative to the cooling device in be stored freely in the extension plane. Tolerances in the cooling device can be compensated for in this way.
  • each reflector of the optics device is connected to one another in one piece, with each reflector being assigned a separate light source device and a separate cooling device. In this way, an additional alignment of the reflectors with respect to one another in order to generate one or more light distributions can advantageously be avoided.
  • the invention enables a light source device to be fastened to an optical device with precise positioning.
  • a light source carrier of the light source device is positioned relative to the optical device. After the light source carrier has been adjusted relative to the optics device, the light source carrier is braced between a contact surface of the optics device and a contact surface of a cooling device. After the assembly process, the light source carrier or the light source is positioned directly on a contact surface of the optical device in a first step.
  • the light source carrier is preferably positioned vertically (z-direction) by resting the light source carrier on the contact surface of the optics device.
  • the light source carrier is aligned or adjusted relative to the optical device by displacing the light source carrier in the plane of extent, preferably in the direction of adjustment.
  • the light source carrier is fixed relative to the optics device in a third step, the cooling device being additionally or simultaneously fixed to the optics device.
  • the light source carrier is positioned at at least two bearing points, with it being firmly positioned at a first bearing point in the extension plane of the contact surface and being positioned displaceably in an adjustment direction at a second bearing point.
  • the Adjustment then take place by moving the light source carrier relative to the optics device in the adjustment direction.
  • the adjustment is thus essentially limited to a single direction, namely preferably to an adjustment direction which is directed in the main emission direction of the lighting device. This is because the greatest errors can occur in the basic setting of the lighting device in this direction.
  • a lighting device can be used as a headlight in the front area of a vehicle, for example an agricultural vehicle (agricultural machine), to generate a predetermined light distribution, for example a working light, daytime running light, low beam and high beam.
  • a predetermined light distribution for example a working light, daytime running light, low beam and high beam.
  • the lighting device can also be used in a rear area of a vehicle or at another location.
  • figure 1 shows a unit for generating a low beam distribution and a high beam distribution. This assembly is installed in a housing, not shown, which has an opening that is covered with a transparent lens.
  • the lighting device essentially has a light source device 1 , an optics device 2 for generating the specified light distribution (low beam, high beam) and a cooling device 3 for cooling or dissipating heat from the light source device 1 .
  • the optics device 2 comprises a reflector assembly 4 with a number, in the present exemplary embodiment three, of reflectors 5 which are connected to one another in one piece figure 1 a first and second reflector 5' is used for the low beam distribution and a third reflector 5'' for the high beam distribution.
  • the reflectors 5, 5', 5'' are each assigned separate light source devices 1 and cooling devices 3.
  • the mounting of the light source device 1 on the first reflector 5' (reflector 5' on the right in the front view) is described by way of example.
  • the light source device 1 comprises a number of light sources 6 (LED light source) which are fixed on a light source carrier 7 . Only a single light source 6 is provided in the present exemplary embodiment. In addition, control electronics 8 are mounted on the light source carrier 7 . Of the Light source carrier 7 is preferably designed as a printed circuit board, preferably a rigid and flat printed circuit board.
  • the cooling device 3 comprises an L-shaped heat sink with a first leg 9 and a second leg 10 preferably running at a right angle to the first leg 9.
  • the first leg 9 runs essentially in the horizontal direction, while the second leg 10 in the vertical direction.
  • the second leg 10 is preferably in contact with a rear side of the reflectors 5 .
  • the first leg 9 rests on an upper side 12 of the reflector 5 , the light source carrier 7 being arranged between the upper side 12 of the reflector 5 and a contact surface 11 of the heat sink 3 in the assembled state.
  • the contact surface 11 of the heat sink 3 thus forms a contact surface which lies flat against the light source carrier 7 .
  • cooling ribs 13 are provided for dissipating the heat into the environment.
  • the reflector 5 has a number of pins 14 on its upper side 12 which serve to fix and adjust the light source carrier 7 .
  • the pins 14 are distributed on the upper side 12 and protrude perpendicularly from the upper side 12 .
  • the pins 14 each have an internal thread.
  • reflector surfaces 16 of the reflectors 5 extend downwards in a parabola-shaped manner or as free-form surfaces in an arc-shaped manner. How out figure 6 As can be seen, the LED light source 6 is arranged pointing downwards, so that the emitted light is deflected by the reflector surface 16 in the main emission direction H to the front.
  • the light source carrier 7 equipped with the light source 6 and the control electronics 8 is placed on the upper side 12 of the reflector 5, with the flat side 17 of the light source carrier 7 having the LED light source 6 lying flat against a contact surface 18 of the reflector 5.
  • the light source carrier 7 has bores 19 corresponding to the pins 14 so that the light source carrier 7 is positioned flat in an extension plane E of the reflector 5 accommodating the upper side 12 .
  • the pins 14 each form bearing points for the light source carrier 7. In the present case, three pins 14 or three bearing points are provided, so that the light source carrier 7 lies flat in the plane of the contact surface 18 after it has been placed on the upper side 12 of the reflector 5.
  • the light source carrier 7 preferably extends in a horizontal plane E.
  • a first bore 19' is designed as a round hole and two second bores 19" are designed as oblong holes.
  • a first bearing point 20 A second bearing point 21 and a third bearing point 22 are provided by means of the elongated holes 19", whose longitudinal direction points in the main emission direction H (in the y-direction), so that the light source carrier can be displaced in the y-direction relative to the reflector 5 at this second and third bearing point 21,22.
  • this target position is fixed by means of fastening screws 23.
  • These fastening screws 23 grip with their Shaft 26, which is provided with an external thread, through a bore 24 of the heat sink 3 in the pin 14 under Formation of a threaded engagement with the same, with a head 27 of the fastening screw 23 on an annular surface 28 of the heat sink 3 presses.
  • the fastening screw 23 By tightening the fastening screw 23, the light source carrier 7 is clamped and fixed between the contact surface of the heat sink 3 and the contact surface of the reflector 5.
  • a receiving recess 29 of the heat sink 3 which has an inside diameter d 1 .
  • This clear diameter d 1 is larger than an outer diameter d 2 of the pin 14 so that the reflector 5 is mounted freely relative to the heat sink 3 in the plane E of extension.
  • the bore 24 is larger than an outside diameter of the shank 26, so that a compensating movement in the extension plane E of the heat sink 3 relative to the reflector 5 is possible.
  • Such a compensatory movement of the heat sink 5 relative to the reflector 5 preferably takes place before the light source carrier 7 is brought into its adjustment target position relative to the reflector 5.
  • both the light source carrier 7 and the heat sink 3 are fixed to the reflector 5.
  • the structural unit formed in this way can then be fixed in the housing of the lighting device.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Description

Die Erfindung betrifft eine Beleuchtungsvorrichtung für Fahrzeuge nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a lighting device for vehicles according to the preamble of patent claim 1.

Aus der DE 10 2012 107 432 A1 ist eine Beleuchtungsvorrichtung für Fahrzeuge bekannt, die eine Lichtquelleneinrichtung, eine Optikeinrichtung sowie eine Kühleinrichtung umfasst. Die Lichtquelleneinrichtung umfasst einen ebenen Lichtquellenträger (Platine), auf der eine Lichtquelle fixiert ist. Der Lichtquellenträger ist flächig mit der Kühleinrichtung verbunden, beispielsweise durch Verkleben oder Verschrauben, so dass eine Lichtquellen-Kühlbaueinheit gebildet ist. Diese Baueinheit wird dann über eine Führung schubladenartig mit der als Reflektor ausgebildeten Optikeinrichtung verbunden. Nachteilig an der bekannten Beleuchtungsvorrichtung ist, dass eine relativ lange Toleranzkette von dem Lichtquellenträger über die Kühleinrichtung zu der Optikeinrichtung entsteht, die das Auftreten von Positionsungenauigkeiten der Lichtquelle zu der Optikeinrichtung begünstigt.From the DE 10 2012 107 432 A1 a lighting device for vehicles is known, which comprises a light source device, an optical device and a cooling device. The light source device comprises a flat light source carrier (board) on which a light source is fixed. The light source carrier is connected over a large area to the cooling device, for example by gluing or screwing, so that a light source cooling unit is formed. This structural unit is then connected to the optical device designed as a reflector in a drawer-like manner via a guide. A disadvantage of the known lighting device is that there is a relatively long tolerance chain from the light source carrier via the cooling device to the optics device, which promotes the occurrence of inaccuracies in the position of the light source in relation to the optics device.

Aus der DE 10 2013 102 835 A1 ist eine Beleuchtungsvorrichtung für Fahrzeuge mit einer Lichtquelleneinrichtung, einer Optikeinrichtung und einer Kühleinrichtung bekannt. Ein Lichtquellenträger der Lichtquelleneinrichtung ist auf einer Anlagefläche eines ersten Schenkels der Kühlkörpereinrichtung montiert. Ein anderer Schenkel der Kühlkörpereinrichtung ist mit einer Rückseite eines Reflektors der Optikeinrichtung verbunden. Diese Beleuchtungsvorrichtung weist ebenfalls eine relativ lange Toleranzkette zwischen Lichtquellenträger und dem Reflektor auf.From the DE 10 2013 102 835 A1 a lighting device for vehicles with a light source device, an optical device and a cooling device is known. A light source carrier of the light source device is mounted on a contact surface of a first leg of the heat sink device. Another leg of the heat sink device is connected to a rear side of a reflector of the optics device. This lighting device also has a relatively long chain of tolerances between the light source carrier and the reflector.

Aus der WO 2014/190368 A1 ist eine Beleuchtungsvorrichtung für Fahrzeuge mit einer Lichtquelleneinrichtung, einer Optikeinrichtung und einer Kühleinrichtung bekannt. Die Optikeinrichtung weist obenseitig zum einen Zapfen und zum anderen Haltefedern auf, so dass nach Aufsetzen eines mit offenen Ausnehmungen versehenen Lichtquellenträgers der Lichtquelleneinrichtung der Lichtquellenträger an der Optikeinrichtung positioniert ist. Nach nachfolgendem Aufsetzen der Kühleinrichtung auf die aus der Lichtquelleneinrichtung und der Optikeinrichtung gebildeten Baueinheit erfolgt eine klemmende Fixierung mittels eines kappenförmigen Fixierbauteils. Nachteilig an der bekannten Beleuchtungsvorrichtung ist, dass mit dem Aufsetzen des Lichtquellenträgers auf die Optikeinheit die Positionierung abgeschlossen ist und somit kein Nachjustieren mehr möglich ist.From the WO 2014/190368 A1 a lighting device for vehicles with a light source device, an optical device and a cooling device is known. The optics device has, on the one hand, pins and, on the other hand, retaining springs at the top, so that after a light source carrier provided with open recesses of the light source device has been placed on, the light source carrier is positioned on the optics device. After the cooling device is subsequently placed on the structural unit formed from the light source device and the optics device, a clamping fixation takes place by means of a cap-shaped fixing component. A disadvantage of the known lighting device is that the positioning is completed when the light source carrier is placed on the optics unit and readjustment is therefore no longer possible.

Aufgabe der vorliegenden Erfindung ist es daher, eine Beleuchtungsvorrichtung für Fahrzeuge derart weiterzubilden, dass auf einfache Weise bei der Montage die Positioniergenauigkeit an der Lichtquelleneinrichtung relativ zu der Optikeinrichtung erhöht wird.The object of the present invention is therefore to further develop a lighting device for vehicles in such a way that the positioning accuracy on the light source device relative to the optical device is increased in a simple manner during assembly.

Zur Lösung dieser Aufgabe weist die erfindungsgemäße Beleuchtungsvorrichtung die Merkmale des Patentanspruchs 1 auf.To solve this problem, the lighting device according to the invention has the features of patent claim 1 .

Der besondere Vorteil der Erfindung besteht darin, dass eine erhöhte Positionsgenauigkeit einer Lichtquelleneinrichtung relativ zu einer Optikeinrichtung durch Verringerung einer Toleranzkette erreicht wird. Nach der Erfindung wird ein Lichtquellenträger zwischen einer Anlagefläche der Optikeinrichtung und einer Anlagefläche der Kühleinrichtung in einer Justiersolllage befestigt. Vor Festlegung des Lichtquellenträgers kann eine Ausrichtung bzw. Justierung relativ zu der Optikeinrichtung erfolgen. Toleranzen einer Kühlkörpereinrichtung müssen hierbei nicht berücksichtigt werden. Ein weiterer Vorteil ergibt sich daraus, dass mit Befestigung der Lichtquelleneinrichtung an der Optikeinrichtung gleichzeitig auch die Kühleinrichtung fixiert wird. Vorteilhaft kann hierdurch der Montageaufwand reduziert werden.The particular advantage of the invention is that increased positioning accuracy of a light source device relative to an optical device is achieved by reducing a tolerance chain. According to the invention, a light source carrier is fastened in a target adjustment position between a contact surface of the optics device and a contact surface of the cooling device. Before the light source carrier is fixed, it can be aligned or adjusted relative to the optical device. Tolerances of a heat sink device do not have to be taken into account here. A further advantage results from the fact that when the light source device is fastened to the optics device, the cooling device is also fixed at the same time. This can advantageously reduce the assembly work.

Nach der Erfindung ist der Lichtquellenträger durch eine Schraubverbindung zwischen der Kühleinrichtung und der Optikeinrichtung gehalten. Hierdurch ergibt sich eine sichere Montage bzw. Demontage der Lichtquelleneinrichtung.According to the invention, the light source carrier is held by a screw connection between the cooling device and the optics device. This results in safe assembly and disassembly of the light source device.

Nach der Erfindung weisen die Zapfen der Optikeinrichtung ein Innengewinde auf, so dass ein Schaft einer Befestigungsschraube in Gewindeeingriff mit den jeweiligen Zapfen gebracht werden können. Es wird hierdurch eine sichere Verbindung der Kühleinrichtung mit der Optikeinrichtung unter Justierung der Lichtquelleneinrichtung geschaffen.According to the invention, the spigots of the optics device have an internal thread, so that a shank of a fastening screw can be brought into threaded engagement with the respective spigot. This creates a secure connection between the cooling device and the optics device, with the light source device being adjusted.

Nach der Erfindung weist die Kühleinrichtung eine Aufnahmeausnehmung für die jeweiligen Zapfen der Optikeinrichtung auf, wobei ein lichter Durchmesser der Aufnahmeausnehmung größer ist als ein Außendurchmesser des Zapfens. Vorteilhaft kann hierdurch die Optikeinrichtung relativ zu der Kühleinrichtung in der Erstreckungsebene frei gelagert werden. Toleranzen der Kühleinrichtung können auf diese Weise ausgeglichen werden.According to the invention, the cooling device has a receiving recess for the respective spigot of the optics device, with an inside diameter of the receiving recess being larger than an outer diameter of the spigot. In this way, the optics device can advantageously be positioned relative to the cooling device in be stored freely in the extension plane. Tolerances in the cooling device can be compensated for in this way.

Nach einer Weiterbildung der Erfindung sind mehrere Reflektoren der Optikeinrichtung einstückig miteinander verbunden, wobei jedem Reflektor eine gesonderte Lichtquelleneinrichtung und eine gesonderte Kühleinrichtung zugeordnet sind. Vorteilhaft kann hierdurch eine zusätzliche Ausrichtung der Reflektoren zu einander zur Erzeugung einer oder mehrerer Lichtverteilungen vermieden werden.According to a development of the invention, several reflectors of the optics device are connected to one another in one piece, with each reflector being assigned a separate light source device and a separate cooling device. In this way, an additional alignment of the reflectors with respect to one another in order to generate one or more light distributions can advantageously be avoided.

Die Erfindung ermöglicht eine positionsgenaue Befestigung einer Lichtquelleneinrichtung zu einer Optikeinrichtung. Ein Lichtquellenträger der Lichtquelleneinrichtung wird relativ zu der Optikeinrichtung positioniert. Nach Justierung des Lichtquellenträgers relativ zu der Optikeinrichtung erfolgt ein Verspannen des Lichtquellenträgers zwischen einer Anlagefläche der Optikeinrichtung und einer Anlagefläche einer Kühleinrichtung. Nach dem Montage-Verfahren erfolgt in einem ersten Schritt eine Positionierung des Lichtquellenträgers bzw. der Lichtquelle direkt an einer Anlagefläche der Optikeinrichtung. Durch Anlage des Lichtquellenträgers an der Anlagefläche der Optikeinrichtung ist der Lichtquellenträger vorzugsweise in der Höhe (z-Richtung) positioniert. In einem zweiten Schritt erfolgt eine Ausrichtung bzw. Justierung des Lichtquellenträgers relativ zu der Optikeinrichtung durch Verschieben des Lichtquellenträgers in der Erstreckungsebene vorzugsweise in Justierrichtung. Nach Justierung erfolgt in einem dritten Schritt die Fixierung des Lichtquellenträgers relativ zu der Optikeinrichtung, wobei zusätzlich bzw. gleichzeitig die Kühleinrichtung an der Optikeinrichtung fixiert wird. Vorteilhaft kann hierdurch eine einfache Justierung und Fixierung von Bauteilen der Beleuchtungsvorrichtung erfolgen.The invention enables a light source device to be fastened to an optical device with precise positioning. A light source carrier of the light source device is positioned relative to the optical device. After the light source carrier has been adjusted relative to the optics device, the light source carrier is braced between a contact surface of the optics device and a contact surface of a cooling device. After the assembly process, the light source carrier or the light source is positioned directly on a contact surface of the optical device in a first step. The light source carrier is preferably positioned vertically (z-direction) by resting the light source carrier on the contact surface of the optics device. In a second step, the light source carrier is aligned or adjusted relative to the optical device by displacing the light source carrier in the plane of extent, preferably in the direction of adjustment. After adjustment, the light source carrier is fixed relative to the optics device in a third step, the cooling device being additionally or simultaneously fixed to the optics device. A simple adjustment and fixing of components of the lighting device can thereby advantageously take place.

Die Positionierung des Lichtquellenträgers erfolgt an mindestens zwei Lagerpunkten, wobei er an einem ersten Lagerpunkt in der Erstreckungsebene der Anlagefläche fest positioniert und in einem zweiten Lagerpunkt in einer Justierrichtung verschiebbar positioniert wird. In einem weiteren Schritt kann die Justierung dann durch relatives Verschieben des Lichtquellenträgers zu der Optikeinrichtung in Justierrichtung erfolgen. Die Justierung beschränkt sich somit im Wesentlichen auf eine einzige Richtung, nämlich vorzugsweise auf eine Justierrichtung, die in Hauptabstrahlrichtung der Beleuchtungsvorrichtung gerichtet ist. Denn in dieser Richtung können die größten Fehler bei der Grundeinstellung der Beleuchtungsvorrichtung eintreten.The light source carrier is positioned at at least two bearing points, with it being firmly positioned at a first bearing point in the extension plane of the contact surface and being positioned displaceably in an adjustment direction at a second bearing point. In a further step, the Adjustment then take place by moving the light source carrier relative to the optics device in the adjustment direction. The adjustment is thus essentially limited to a single direction, namely preferably to an adjustment direction which is directed in the main emission direction of the lighting device. This is because the greatest errors can occur in the basic setting of the lighting device in this direction.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen näher erläutert:
Es zeigen:

Fig. 1
eine perspektivische Vorderansicht einer Baueinheit bestehend aus einer Lichtquelleneinrichtung, einer Optikeinrichtung und einer Kühleinrichtung, wobei die Baueinheit in einem nicht dargestellten Gehäuse einer Beleuchtungsvorrichtung verbaut ist,
Fig. 2
eine Darstellung einer Reflektorbaueinheit von schräg oben nach Positionieren eines Lichtquellenträgers der Lichtquelleneinrichtung auf einer Oberseite eines Reflektors der Reflektorbaueinheit,
Fig. 3
Draufsicht auf die Reflektorbaueinheit gemäß Figur 2,
Fig. 4
eine Darstellung der Reflektorbaueinheit unmittelbar vor Fixieren einer Kühleinrichtung an einem Reflektor der Reflektorbaueinheit,
Fig. 5
eine Vorderansicht der Baueinheit im montierten Zustand und
Fig. 6
einen Vertikalschnitt durch die Schnittlinie VI-VI in Figur 5.
An embodiment of the invention is explained in more detail below with reference to the drawings:
Show it:
1
a perspective front view of a unit consisting of a light source device, an optical device and a cooling device, the unit being installed in a housing (not shown) of a lighting device,
2
a representation of a reflector assembly obliquely from above after positioning a light source carrier of the light source device on an upper side of a reflector of the reflector assembly,
3
Plan view of the reflector assembly according to FIG figure 2 ,
4
a representation of the reflector assembly immediately before fixing a cooling device to a reflector of the reflector assembly,
figure 5
a front view of the assembly in the assembled state and
6
a vertical section through line VI-VI in figure 5 .

Eine Beleuchtungsvorrichtung kann als Scheinwerfer im Frontbereich eines Fahrzeugs, beispielsweise eines landwirtschaftlichen Fahrzeugs (Landmaschine), eingesetzt werden zur Erzeugung einer vorgegebenen Lichtverteilung, beispielsweise eines Arbeits-, Tagfahr-, Abblend- und Fernlichtes. Alternativ kann die Beleuchtungsvorrichtung auch in einem Heckbereich eines Fahrzeugs oder an anderer Stelle eingesetzt werden.A lighting device can be used as a headlight in the front area of a vehicle, for example an agricultural vehicle (agricultural machine), to generate a predetermined light distribution, for example a working light, daytime running light, low beam and high beam. Alternatively, the lighting device can also be used in a rear area of a vehicle or at another location.

Figur 1 zeigt eine Baueinheit zur Erzeugung einer Abblendlichtverteilung und einer Fernlichtverteilung. Diese Baueinheit wird in einem nicht dargestellten Gehäuse verbaut, das über eine Öffnung versehen ist, die mit einer transparenten Abschlussscheibe abgedeckt ist. figure 1 shows a unit for generating a low beam distribution and a high beam distribution. This assembly is installed in a housing, not shown, which has an opening that is covered with a transparent lens.

Die Beleuchtungsvorrichtung weist im Wesentlichen eine Lichtquelleneinrichtung 1, eine Optikeinrichtung 2 zur Erzeugung der vorgegebenen Lichtverteilung (Abblendlicht, Fernlicht) sowie eine Kühleinrichtung 3 zur Kühlung bzw. Wärmeabfuhr der Lichtquelleneinrichtung 1 auf.The lighting device essentially has a light source device 1 , an optics device 2 for generating the specified light distribution (low beam, high beam) and a cooling device 3 for cooling or dissipating heat from the light source device 1 .

Die Optikeinrichtung 2 umfasst eine Reflektorbaueinheit 4 mit einer Anzahl, im vorliegenden Ausführungsbeispiel drei, von einstückig miteinander verbundenen Reflektoren 5. In Figur 1 wird ein erster und zweiter Reflektor 5' zur Abblendlichtverteilung und ein dritter Reflektor 5" zur Fernlichtverteilung eingesetzt. Den Reflektoren 5, 5', 5" sind jeweils gesonderte Lichtquelleneinrichtungen 1 und Kühleinrichtungen 3 zugeordnet. Im Folgenden wird beispielhaft die Montage der Lichtquelleneinrichtung 1 an dem ersten Reflektor 5' (in Vorderansicht rechter Reflektor 5') beschrieben.The optics device 2 comprises a reflector assembly 4 with a number, in the present exemplary embodiment three, of reflectors 5 which are connected to one another in one piece figure 1 a first and second reflector 5' is used for the low beam distribution and a third reflector 5'' for the high beam distribution. The reflectors 5, 5', 5'' are each assigned separate light source devices 1 and cooling devices 3. In the following, the mounting of the light source device 1 on the first reflector 5' (reflector 5' on the right in the front view) is described by way of example.

Die Lichtquelleneinrichtung 1 umfasst eine Anzahl von Lichtquellen 6 (LED-Lichtquelle), die auf einem Lichtquellenträger 7 fixiert sind. Im vorliegenden Ausführungsbeispiel ist lediglich eine einzige Lichtquelle 6 vorgesehen. Zusätzlich ist auf dem Lichtquellenträger 7 eine Steuerelektronik 8 montiert. Der Lichtquellenträger 7 ist vorzugsweise als eine Leiterplatte, vorzugsweise eine starre und ebene Leiterplatte, ausgebildet.The light source device 1 comprises a number of light sources 6 (LED light source) which are fixed on a light source carrier 7 . Only a single light source 6 is provided in the present exemplary embodiment. In addition, control electronics 8 are mounted on the light source carrier 7 . Of the Light source carrier 7 is preferably designed as a printed circuit board, preferably a rigid and flat printed circuit board.

Die Kühleinrichtung 3 umfasst einen L-förmigen Kühlkörper mit einem ersten Schenkel 9 und mit einem vorzugsweise in einem rechten Winkel zu dem ersten Schenkel 9 verlaufenden zweiten Schenkel 10. Der erste Schenkel 9 verläuft im Wesentlichen in horizontaler Richtung, während der zweite Schenkel 10 in vertikaler Richtung verläuft. Der zweite Schenkel 10 liegt vorzugsweise an einer Rückseite der Reflektoren 5 an. Der erste Schenkel 9 liegt auf einer Oberseite 12 des Reflektors 5 auf, wobei im montierten Zustand zwischen der Oberseite 12 des Reflektors 5 und einer Anlagefläche 11 des Kühlkörpers 3 der Lichtquellenträger 7 angeordnet ist. Die Anlagefläche 11 des Kühlkörpers 3 bildet somit eine Kontaktfläche, die flächig an dem Lichtquellenträger 7 anliegt. Auf einer dem Lichtquellenträger 7 abgewandten Seite des ersten Schenkels 9 sind Kühlrippen 13 zur Abgabe der Wärme in die Umgebung vorgesehen.The cooling device 3 comprises an L-shaped heat sink with a first leg 9 and a second leg 10 preferably running at a right angle to the first leg 9. The first leg 9 runs essentially in the horizontal direction, while the second leg 10 in the vertical direction. The second leg 10 is preferably in contact with a rear side of the reflectors 5 . The first leg 9 rests on an upper side 12 of the reflector 5 , the light source carrier 7 being arranged between the upper side 12 of the reflector 5 and a contact surface 11 of the heat sink 3 in the assembled state. The contact surface 11 of the heat sink 3 thus forms a contact surface which lies flat against the light source carrier 7 . On a side of the first leg 9 facing away from the light source carrier 7, cooling ribs 13 are provided for dissipating the heat into the environment.

Wie aus Figur 2 ersichtlich ist, weist der Reflektor 5 an seiner Oberseite 12 eine Anzahl von Zapfen 14 auf, die zur Fixierung und Justierung des Lichtquellenträgers 7 dienen. Die Zapfen 14 sind auf der Oberseite 12 verteilt angeordnet und ragen senkrecht von der Oberseite 12 ab. Die Zapfen 14 weisen jeweils ein Innengewinde auf.How out figure 2 As can be seen, the reflector 5 has a number of pins 14 on its upper side 12 which serve to fix and adjust the light source carrier 7 . The pins 14 are distributed on the upper side 12 and protrude perpendicularly from the upper side 12 . The pins 14 each have an internal thread.

Von einer vorderen Randkante 15 der Oberseite 12 verlaufen parabelförmig oder als Freiformflächen Reflektorflächen 16 der Reflektoren 5 bogenförmig nach unten. Wie aus Figur 6 zu ersehen ist, ist die LED-Lichtquelle 6 nach unten gerichtet angeordnet, so dass das abgestrahlte Licht von der Reflektorfläche 16 in Hauptabstrahlrichtung H nach vorne umgelenkt wird.From a front edge 15 of the upper side 12, reflector surfaces 16 of the reflectors 5 extend downwards in a parabola-shaped manner or as free-form surfaces in an arc-shaped manner. How out figure 6 As can be seen, the LED light source 6 is arranged pointing downwards, so that the emitted light is deflected by the reflector surface 16 in the main emission direction H to the front.

Zur Montage wird in einem ersten Schritt der mit der Lichtquelle 6 und der Steuerelektronik 8 bestückte Lichtquellenträger 7 auf die Oberseite 12 des Reflektors 5 angelegt, wobei die LED-Lichtquelle 6 aufweisende Flachseite 17 des Lichtquellenträgers 7 flächig an eine Anlagefläche 18 des Reflektors 5 anliegt. Der Lichtquellenträger 7 weist zu den Zapfen 14 korrespondierende Bohrungen 19 auf, damit der Lichtquellenträger 7 flächig in einer die Oberseite 12 aufnehmenden Erstreckungsebene E des Reflektors 5 positioniert ist. Die Zapfen 14 bilden jeweils Lagerpunkte für den Lichtquellenträger 7. Im vorliegenden Fall sind drei Zapfen 14 bzw. drei Lagerpunkte vorgesehen, so dass der Lichtquellenträger 7 nach Aufsetzen auf der Oberseite 12 des Reflektors 5 flächig in der Ebene der Anlagefläche 18 aufliegt. Der Lichtquellenträger 7 erstreckt sich vorzugsweise in einer horizontalen Erstreckungsebene E.For assembly, in a first step, the light source carrier 7 equipped with the light source 6 and the control electronics 8 is placed on the upper side 12 of the reflector 5, with the flat side 17 of the light source carrier 7 having the LED light source 6 lying flat against a contact surface 18 of the reflector 5. The light source carrier 7 has bores 19 corresponding to the pins 14 so that the light source carrier 7 is positioned flat in an extension plane E of the reflector 5 accommodating the upper side 12 . The pins 14 each form bearing points for the light source carrier 7. In the present case, three pins 14 or three bearing points are provided, so that the light source carrier 7 lies flat in the plane of the contact surface 18 after it has been placed on the upper side 12 of the reflector 5. The light source carrier 7 preferably extends in a horizontal plane E.

Damit der Lichtquellenträger 7 in einer Justierrichtung, im vorliegenden Ausführungsbeispiel in Hauptabstrahlrichtung H (y-Richtung), ausgerichtet bzw. justiert werden kann, ist eine erste Bohrung 19' als ein Rundloch und zwei zweite Bohrungen 19" als Langloch ausgebildet. Mittels des Rundlochs 19' erfolgt eine in der Erstreckungsebene E fixe Positionierung des Lichtquellenträgers 7 an einem ersten Lagerpunkt 20. Mittels der Langlöcher 19", deren Längsrichtung in Hauptabstrahlrichtung H (in y-Richtung) weist, sind an einem zweiten Lagerpunkt 21 und einem dritten Lagerpunkt 22 vorgesehen, so dass der Lichtquellenträger an diesem zweiten und dritten Lagerpunkt 21,22 in y-Richtung relativ zu dem Reflektor 5 verschiebbar ist.So that the light source carrier 7 can be aligned or adjusted in an adjustment direction, in the present exemplary embodiment in the main emission direction H (y-direction), a first bore 19' is designed as a round hole and two second bores 19" are designed as oblong holes. By means of the round hole 19 'A fixed positioning of the light source carrier 7 in the extension plane E takes place at a first bearing point 20. A second bearing point 21 and a third bearing point 22 are provided by means of the elongated holes 19", whose longitudinal direction points in the main emission direction H (in the y-direction), so that the light source carrier can be displaced in the y-direction relative to the reflector 5 at this second and third bearing point 21,22.

Nach Verbringen bzw. Verschieben des Lichtquellenträgers 7 relativ zu dem Reflektor 5 in eine Justiersolllage, in der sich die Lichtquelle 6 in einer gewünschten definierten Lage zu der Reflektorfläche 5' befindet, erfolgt eine Fixierung dieser Solllage mittels Befestigungsschrauben 23. Diese Befestigungsschrauben 23 greifen mit ihrem Schaft 26, der mit einem Außengewinde versehen ist, durch eine Bohrung 24 des Kühlkörpers 3 in die Zapfen 14 unter Bildung eines Gewindeeingriffs mit demselben ein, wobei ein Kopf 27 der Befestigungsschraube 23 auf eine Ringfläche 28 des Kühlkörpers 3 drückt. Durch Anziehen der Befestigungsschraube 23 wird der Lichtquellenträger 7 zwischen der Anlagefläche des Kühlkörpers 3 und der Anlagefläche des Reflektors 5 eingespannt und fixiert. Auf einer dem Reflektor 5 zugewandten Seite der Bohrung 24 schließt sich eine Aufnahmeausnehmung 29 des Kühlkörpers 3 an, der einen lichten Durchmesser d1 aufweist. Dieser lichte Durchmesser d1 ist größer als ein Außendurchmesser d2 des Zapfens 14, so dass der Reflektor 5 relativ zu dem Kühlkörper 3 in der Erstreckungsebene E frei gelagert ist. Selbstverständlich ist die Bohrung 24 größer als ein Außendurchmesser des Schaftes 26, so dass eine Ausgleichsbewegung in der Erstreckungsebene E des Kühlkörpers 3 relativ zu dem Reflektor 5 möglich ist. Eine solche Ausgleichsbewegung des Kühlkörpers 5 relativ zu dem Reflektor 5 erfolgt vorzugsweise vor Verbringen des Lichtquellenträgers 7 in seiner Justiersolllage relativ zu dem Reflektor 5. Mit Festziehen der Befestigungsschrauben 23 sind sowohl der Lichtquellenträger 7 als auch der Kühlkörper 3 mit dem Reflektor 5 fixiert. Die so gebildete Baueinheit kann dann in dem Gehäuse der Beleuchtungsvorrichtung fixiert werden.After bringing or moving the light source carrier 7 relative to the reflector 5 into a target adjustment position in which the light source 6 is in a desired defined position relative to the reflector surface 5', this target position is fixed by means of fastening screws 23. These fastening screws 23 grip with their Shaft 26, which is provided with an external thread, through a bore 24 of the heat sink 3 in the pin 14 under Formation of a threaded engagement with the same, with a head 27 of the fastening screw 23 on an annular surface 28 of the heat sink 3 presses. By tightening the fastening screw 23, the light source carrier 7 is clamped and fixed between the contact surface of the heat sink 3 and the contact surface of the reflector 5. On a side of the bore 24 facing the reflector 5 there is a receiving recess 29 of the heat sink 3 which has an inside diameter d 1 . This clear diameter d 1 is larger than an outer diameter d 2 of the pin 14 so that the reflector 5 is mounted freely relative to the heat sink 3 in the plane E of extension. Of course, the bore 24 is larger than an outside diameter of the shank 26, so that a compensating movement in the extension plane E of the heat sink 3 relative to the reflector 5 is possible. Such a compensatory movement of the heat sink 5 relative to the reflector 5 preferably takes place before the light source carrier 7 is brought into its adjustment target position relative to the reflector 5. When the fastening screws 23 are tightened, both the light source carrier 7 and the heat sink 3 are fixed to the reflector 5. The structural unit formed in this way can then be fixed in the housing of the lighting device.

Claims (3)

  1. . A lighting apparatus for vehicles, having a light source device (1) including a light source (6) and a light source carrier (7), having an optics device (2) for generating a predetermined light distribution and having a cooling device (3) for the light source (6), wherein the light source (6) is fastened in a reference aligning position relative to the optics device (2), wherein the light source carrier (7) can be moved relative to the optics device (2) in the reference aligning position for the orientation of the light source (6) with respect to the optics device (2) and, lastly, is fastened by means of a screw connection in the reference aligning position between an abutment surface (18) of the optics device (2) and an abutment surface (11) of the cooling device (3), wherein the light source carrier (7) is positioned via at least two bearing points (20, 21, 22) which are arranged to be distributed in a plane of extent (E) receiving the abutment surface (18) of the optics device (2), wherein the light source carrier (7) is planar and has at least two bore holes (19, 19', 19") in which a lug (14) projecting from the abutment surface (18) of the optics device (2) engages in each instance, which each form the bearing points (20, 21, 22) for the light source carrier (7), wherein the cooling device (3) has a receiving recess (29) for receiving the respective lugs (14), wherein an inside diameter (d1) of the receiving recess (29) is larger than an outside diameter (d2) of the lugs (14), characterized in that the lugs (14) of the optics device (5) have an internal thread, the cooling device (3) has bore holes (24) aligned with the lugs (14) of the optics device (5) at the bearing points (20, 21, 22) for the partial engagement of fastening screws (23) of the screw connection in the lugs (14), wherein a shaft (26) of the fastening screw (23) is in threaded engagement with the respective lug (14).
  2. . The lighting apparatus according to Claim 1, characterized in that the abutment surface (18) of the optics device (5) is formed by an upper side (12) of a reflector (5), and a quantity of reflector surfaces (16) extend downward in an arcshaped manner from the outer edge (15) of the reflector (5).
  3. . The lighting apparatus according to Claim 1 or 2, characterized in that a plurality of reflectors (5, 5', 5") are connected to one another in one piece, wherein each reflector (5', 5") is connected to a separate light source carrier (7) and a separate cooling device (3).
EP18709248.1A 2017-03-08 2018-01-30 Lighting apparatus for vehicles Active EP3593033B1 (en)

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DE102017104841.3A DE102017104841A1 (en) 2017-03-08 2017-03-08 Lighting device for vehicles and assembly methods
PCT/DE2018/100071 WO2018161988A1 (en) 2017-03-08 2018-01-30 Lighting apparatus for vehicles and mounting method

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EP3593033A1 EP3593033A1 (en) 2020-01-15
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WO2018161988A1 (en) 2018-09-13
DE102017104841A1 (en) 2018-09-13
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EP3593033A1 (en) 2020-01-15
US11353189B2 (en) 2022-06-07

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