EP1646538A1 - Windshield wiping device for a motor vehicle - Google Patents

Windshield wiping device for a motor vehicle

Info

Publication number
EP1646538A1
EP1646538A1 EP04729602A EP04729602A EP1646538A1 EP 1646538 A1 EP1646538 A1 EP 1646538A1 EP 04729602 A EP04729602 A EP 04729602A EP 04729602 A EP04729602 A EP 04729602A EP 1646538 A1 EP1646538 A1 EP 1646538A1
Authority
EP
European Patent Office
Prior art keywords
holding element
connecting webs
wiper device
tube
molded tube
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.)
Withdrawn
Application number
EP04729602A
Other languages
German (de)
French (fr)
Inventor
Achim Kraus
Jan Dietrich
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1646538A1 publication Critical patent/EP1646538A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34—Wiper arms; Mountings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/0488—Wiper arrangement for crash protection or impact absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/0413—Modular wiper assembly
    • B60S1/0422—Modular wiper assembly having a separate transverse element
    • B60S1/0425—Modular wiper assembly having a separate transverse element characterised by the attachment of the wiper shaft holders to the transverse element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/63—Frangible connections

Definitions

  • the invention relates to a windshield wiper device for a motor vehicle with at least one molded tube for receiving a drive shaft for driving at least one wiper arm, the at least one molded tube being connectable to a holding element which can be connected to the body and to a stump which accommodates a circuit board tube.
  • Pedestrians are completely unprotected when they collide with vehicles.
  • the unyielding, hard parts underneath the bonnet often lead to serious injuries when a pedestrian hits a vehicle.
  • the windshield wiper device is located in an area in which pedestrians frequently encounter a vehicle when it hits it.
  • vehicle manufacturers require a minimum distance of 65 millimeters to 85 millimeters between the bonnet and the wiper drive.
  • a drive shaft of the windshield wiper device usually protrudes from the molded tube and is usually only a distance of 10 millimeters from the hood. If the head of a pedestrian collides with the vehicle in the area of the molded tube, the bonnet can only deform relatively little in this area.
  • the object of the invention is to improve a windshield wiper device of the type mentioned at the outset in such a way that the connection of the molded tube to the holding element and / or the stump will be realized in a material-saving manner in the future.
  • the windshield wiper device for a motor vehicle with at least one shaped tube for receiving a drive shaft for driving at least one wiper arm, the at least one shaped tube being connectable to a holding element which can be connected to the body and to a stump receiving a sinker tube.
  • the windshield wiper device is characterized in that connecting webs are provided for connecting the at least one shaped tube to the holding element and / or to the stump.
  • the connecting webs are relatively thin and therefore material-saving components. They thus serve to reduce weight and costs.
  • the connecting webs are structurally simple to implement components that can be implemented inexpensively, in particular in the case of a plastic construction, to the specific requirements placed on them.
  • the connecting webs can deform or break off when a pedestrian hits a bonnet, so that the molded tube is displaced in the direction of the impact force as a result of the impact.
  • the molded tube does not pose a risk of injury to the pedestrian.
  • zinc and die-cast aluminum can also be considered as construction materials.
  • an impact force acting on the at least one shaped tube and thus on the connecting webs can be reinforced by a lever arm construction.
  • the lever arm construction ensures that even small forces deform or break off the connecting webs, which increases the safety of pedestrians.
  • the lever arm construction in such a way that the connecting webs are subjected to tension and / or bending over their entire cross section when the impact force acts on the molded tube.
  • the connecting webs are particularly heavily stressed by the tensile and / or bending stress. As a result, the connecting webs can be bent or broken by the tensile and / or bending stress even with low forces.
  • the windshield wiper device has connecting webs which each have different cross sections, then first the connecting webs with the smallest cross section and then the connecting webs with the larger cross section to fail. This means that the connecting webs can break or bend in a precisely predeterminable sequence.
  • the connecting webs can be arranged like a toggle lever.
  • the connecting webs can expediently also be equipped with predetermined breaking points, in order to additionally ensure safe breaking of the connecting webs.
  • the invention comprises a windshield wiper device for a motor vehicle with at least one molded tube for receiving a drive shaft for driving at least one wiper arm, the at least one molded tube being connectable to a holding element which can be connected to the body, and the holding element according to the invention in the region of the connection of the at least one Shaped tube has a cross-section reduction on the holding element.
  • the cross-section reduction can be arranged in the area of a maximum bending moment or a maximum tensile stress.
  • FIG. 1 shows a perspective view of a first possibility of connecting a molded tube with a holding element and a connecting piece
  • FIG. 2 shows a perspective view of a second possibility of connecting a shaped tube with a holding element and a connecting piece.
  • FIG. 1 shows a molded tube 10 into which a drive shaft (not shown here) for driving a wiper arm (also not shown here) can be inserted.
  • a holding element 11 and a stump 12 are connected to the shaped tube 10.
  • the holding element 11 has a receiving opening 13, into which fastening means (not shown here) for fastening the holding element 11 with a body not shown here can be introduced.
  • the connection of the holding element 11 to the body creates a fixed clamping point 17.
  • a circuit board tube, also not shown, can be crimped onto the stump 12, so that the stump 12 has a fixed clamping point 18.
  • the holding element 11 and the stump 12 are connected to the molded tube 10 by webs 14 and 15. prevented.
  • the webs 15 each have a knee 16 which is connected to the molded tube 10.
  • a force F for example an impact force when a pedestrian collides, acts on the molded tube 10
  • the molded tube 10 moves in the direction of the force F as a result of the force F and as a result of the reaction forces acting on the clamping points 17 and 18, and likewise the knees 16 are moved in the direction of the force F.
  • This movement of the knees 16 stretches the connecting webs 15, so that the connecting webs 14 are subjected to a strong tensile stress and finally tear.
  • the connecting webs 15 are also overloaded.
  • the connecting webs 15 also break as a result of the bending stress acting on them, so that the shaped tube 10 evades the impact in the direction of the force F.
  • the holding element 21 can be fastened to a vehicle body, not shown in detail, so that there is a fixed clamping point 27.
  • the stump 22 can be crimped onto a circuit board tube, so that the stump 22 has a fixed clamping point 28.
  • the holding element 21 is connected to the molded tube 20 by connecting webs 23 and 24. If an impact force F acts on the molded tube 20, corresponding reaction forces act in the clamping points 27 and 28. Due to the force F and the reaction forces acting against it, the connecting web 23, which has a smaller cross section than the connecting web 24, is subjected to a great deal of tension, so that it tears as a result of this load.
  • the connecting web 24 also breaks, so that the molded tube 20 in the direction of the force F evades the impact.
  • the force F acts with respect the clamping point 27 with a lever arm h x
  • the tensile force acting in the connecting web 23 acts with the lever arm h 2 .
  • the larger hi or the smaller h is 2, by tearing the earlier of Getting Connected web 23.
  • the minimum required force can be estimmt b that required for failure of the connecting web 23 is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Window Of Vehicle (AREA)
  • Superstructure Of Vehicle (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

Disclosed is a windshield wiping device for a motor vehicle, comprising at least one molded tube (10) for accommodating a drive shaft that drives at least one wiper arm. The at least one molded tube (10) can be joined to a holding element (11) that can be connected to the body, and a butt (12) which receives a tubular plate. Connecting webs (14, 15) are provided for joining the at least one molded tube (10) to the holding element (11) and/or the butt (12).

Description

Scheibenwischvorrichtung für ein Kraf fahrzeug Windshield wiper device for a motor vehicle
Beschreibungdescription
Die Erfindung betrifft eine Scheibenwischvorrichtung für ein Kraftfahrzeug mit mindestens einem Formrohr zur Aufnahme einer Antriebswelle zum Antrieb von mindestens einem Wischarm, wobei das mindestens eine Formrohr an einem mit der Karosserie verbindbaren Halteelement und an einem ein Platinenrohr aufnehmenden Stumpf anbindbar ist.The invention relates to a windshield wiper device for a motor vehicle with at least one molded tube for receiving a drive shaft for driving at least one wiper arm, the at least one molded tube being connectable to a holding element which can be connected to the body and to a stump which accommodates a circuit board tube.
Fußgänger sind beim Zusammenstoß mit Fahrzeugen völlig ungeschützt. Besonders die unnachgiebigen, harten Teile unterhalb der Motorhaube führen oft zu schweren Verletzungen beim Aufprall eines Fußgängers auf ein Fahrzeug. Die Scheibenwischvorrichtung befindet sich in einem Bereich, in dem Fußgänger beim Aufprall auf ein Fahrzeug häufig auftreffen. Um das Verletzungsrisiko zu minimieren, wird von den Fahrzeugherstellern ein Mindestabstand von 65 Millimetern bis 85 Millimetern zwischen der Motorhaube und dem Wischerantrieb gefordert. Eine Antriebswelle der Scheibenwischvorrichtung ragt aber in der Regel aus dem Formrohr heraus, und hat üblicherweise nur einen Abstand von 10 Millimetern bis zur Haube. Wenn der Kopf eines Fußgängers beim Aufprall auf das Fahrzeug im Bereich des Formrohres aufprallt, so kann sich die Motorhaube in diesem Bereich nur relativ wenig verformen. Folglich sind schwere Verletzungen des Fußgängers zu erwarten. Deshalb sind aus dem Stand der Technik Lösungen bekannt, bei denen das Formrohr durch einen Aufprall bricht, so dass die Verletzungsgefahr für den Fußgänger reduziert wird. Die DE 696 00 678 T2 beschreibt eine Wischvorrichtung für ein Kraftfahrzeug mit einem Formrohr, an dem ein Halteelement und ein Stumpf angebunden sind. Der Stumpf oder das Halteelement weisen eine Kerbe auf, an der im Falle eines Fußgängeraufpralls der Stumpf oder das Halteelement brechen. Diese vorgeschlagene Lösung hat jedoch den Nachteil, dass insbesondere im Bereich der Anbindung des Halteelements und des Stumpfs an das Formrohr sehr viel Material vorhanden ist. Obwohl ein Bruch zwischen Halteelement und Formrohr oder zwischen Stumpf und Formrohr angestrebt wird.Pedestrians are completely unprotected when they collide with vehicles. In particular, the unyielding, hard parts underneath the bonnet often lead to serious injuries when a pedestrian hits a vehicle. The windshield wiper device is located in an area in which pedestrians frequently encounter a vehicle when it hits it. To minimize the risk of injury, vehicle manufacturers require a minimum distance of 65 millimeters to 85 millimeters between the bonnet and the wiper drive. However, a drive shaft of the windshield wiper device usually protrudes from the molded tube and is usually only a distance of 10 millimeters from the hood. If the head of a pedestrian collides with the vehicle in the area of the molded tube, the bonnet can only deform relatively little in this area. As a result, serious injuries to the pedestrian can be expected. For this reason, solutions are known from the prior art in which the shaped tube breaks due to an impact, so that the risk of injury to the pedestrian is reduced. DE 696 00 678 T2 describes a wiper device for a motor vehicle with a molded tube to which a holding element and a stump are connected. The stump or the holding element has a notch on which the stump or the holding element breaks in the event of a pedestrian impact. However, this proposed solution has the disadvantage that a great deal of material is present, in particular in the region of the connection of the holding element and the stump to the shaped tube. Although the aim is to break between the holding element and the molded tube or between the stump and the molded tube.
Die Erfindung hat die Aufgabe, eine Scheibenwischvorrichtung der eingangs genannten Art dahingehend zu verbessern, dass zukünftig die Anbindung des Formrohrs mit dem Halteelement und/oder dem Stumpf materialsparender realisiert wird.The object of the invention is to improve a windshield wiper device of the type mentioned at the outset in such a way that the connection of the molded tube to the holding element and / or the stump will be realized in a material-saving manner in the future.
Die Erfindung löst die gestellte Aufgabe durch eine Scheibenwischvorrichtung für ein Kraftfahrzeug mit mindestens einem Formrohr zur Aufnahme einer Antriebswelle zum Antrieb von mindestens einem Wischarm, wobei das mindestens eine Formrohr an einem mit der Karosserie verbindbaren Halteelement und an einem ein Platinenrohr aufnehmenden Stumpf anbindbar ist. Erfindungsgemäß ist die Scheibenwischvorrichtung dadurch gekennzeichnet, dass zur Anbindung des mindestens einen Formrohres an das Halteelement und/oder an den Stumpf Verbindungsstege vorgesehen sind. Die Verbindungsstege sind relativ dünne und somit materialsparende Bauteile. Sie dienen damit der Gewichts- und Kostenreduzierung. Die Verbindungsstege sind konstruktiv einfach zu realisierende Bauelemente, die insbesondere bei einer Kunststoffkonstruktion auf die bestimmten an sie gestellten Anforderungen preiswert realisiert werden können. Trotzdem gewährleisten sie eine zuverlässige Anbindung des Formrohres an das Halteelement und an den Stumpf. Außerdem können sich die Verbindungsstege beim Aufprall eines Fußgängers auf einer Motorhaube verformen oder abbrechen, so dass das Formrohr infolge des Aufpralls in Richtung der Aufprallkraft verschoben wird. Somit stellt das Formrohr keine Verletzungsgefahr für den Fußgänger dar. Neben Kunststoff können insbesondere auch Zink und Aluminiumdruckguss als Konstruktionswerkstoffe in Betracht gezogen werden.The invention achieves the stated object by a windshield wiper device for a motor vehicle with at least one shaped tube for receiving a drive shaft for driving at least one wiper arm, the at least one shaped tube being connectable to a holding element which can be connected to the body and to a stump receiving a sinker tube. According to the invention, the windshield wiper device is characterized in that connecting webs are provided for connecting the at least one shaped tube to the holding element and / or to the stump. The connecting webs are relatively thin and therefore material-saving components. They thus serve to reduce weight and costs. The connecting webs are structurally simple to implement components that can be implemented inexpensively, in particular in the case of a plastic construction, to the specific requirements placed on them. Nevertheless, they ensure a reliable connection of the molded tube to the holding element and to the stump. In addition, the connecting webs can deform or break off when a pedestrian hits a bonnet, so that the molded tube is displaced in the direction of the impact force as a result of the impact. Thus, the molded tube does not pose a risk of injury to the pedestrian. In addition to plastic, zinc and die-cast aluminum can also be considered as construction materials.
Bei einer Weiterbildung der Erfindung kann eine auf das mindestens eine Formrohr und somit auf die Verbindungsstege wirkende Aufprallkraft durch eine Hebelarmkonstruktion verstärkt werden. Durch die Hebelarmkonstruktion ist bereits bei kleinen Kräften eine Verformung oder ein Abbrechen der Verbindungsstege sichergestellt, wodurch die Sicherheit der Fußgänger erhöht wird.In a further development of the invention, an impact force acting on the at least one shaped tube and thus on the connecting webs can be reinforced by a lever arm construction. The lever arm construction ensures that even small forces deform or break off the connecting webs, which increases the safety of pedestrians.
Es ist möglich, die Hebelarmkonstruktion in der Weise auszulegen, dass die Verbindungsstege beim Einwirken der Aufprallkraft auf das Formrohr über ihren gesamten Querschnitt auf Zug und/oder auf Biegung beansprucht werden. Durch die Zug- und/oder Biegebeanspruchung sind die Verbindungsstege besonders stark belastet. Folglich können die Verbindungsstege durch die Zug- und/oder Biegebeanspruchung schon bei geringen Kräften verbogen oder gebrochen werden.It is possible to design the lever arm construction in such a way that the connecting webs are subjected to tension and / or bending over their entire cross section when the impact force acts on the molded tube. The connecting webs are particularly heavily stressed by the tensile and / or bending stress. As a result, the connecting webs can be bent or broken by the tensile and / or bending stress even with low forces.
Wenn die Scheibenwischvorrichtung Verbindungsstege aufweist, die jeweils verschiedene Querschnitte haben, dann werden zuerst die Verbindungsstege mit dem kleinsten Querschnitt und anschließend die Verbindungsstege mit dem größeren Querschnitt versagen. Somit können die Verbindungsstege in einer genau vorher definierbaren Reihenfolge brechen oder sich verbiegen.If the windshield wiper device has connecting webs which each have different cross sections, then first the connecting webs with the smallest cross section and then the connecting webs with the larger cross section to fail. This means that the connecting webs can break or bend in a precisely predeterminable sequence.
In einer bevorzugten Ausführungsform der Erfindung können die Verbindungsstege kniehebelartig angeordnet sein. Dadurch lassen sich schon bei kleinen Verformungswegen große Spannungen in den Verbindungsstegen aufbauen, wodurch die schwächeren Verbindungsstege relativ schnell versagen und somit eine Fortbewegung des mindestens einen Formrohres aus dem Aufprallbereich sicherstellen.In a preferred embodiment of the invention, the connecting webs can be arranged like a toggle lever. As a result, large stresses can be built up in the connecting webs even with small deformation paths, as a result of which the weaker connecting webs fail relatively quickly and thus ensure that the at least one shaped tube moves away from the impact area.
Zweckmäßigerweise können die Verbindungsstege auch mit Sollbruchstellen ausgestattet sein, um ein sicheres Brechen der Verbindungsstege zusätzlich zu gewährleisten.The connecting webs can expediently also be equipped with predetermined breaking points, in order to additionally ensure safe breaking of the connecting webs.
Ferner umfasst die Erfindung eine Scheibenwischvorrichtung für ein Kraftfahrzeug mit mindestens einem Formrohr zur Aufnahme einer Antriebswelle zum Antrieb von mindestens einem Wischarm, wobei das mindestens eine Formrohr an einem mit der Karosserie verbindbaren Halteelement anbindbar ist, und das Halteelement erfindungsgemäß im Bereich der Anbindung des mindestens einen Formrohrs an das Halteelement eine Querschnittsreduzierung aufweist. Folglich kann das Formrohr zusammen mit dem daran angebundenen Halteelement durch den Aufprall im Bereich der Querschnittsreduzierung schon bei niedrigen Belastungen verbogen oder gebrochen werden.Furthermore, the invention comprises a windshield wiper device for a motor vehicle with at least one molded tube for receiving a drive shaft for driving at least one wiper arm, the at least one molded tube being connectable to a holding element which can be connected to the body, and the holding element according to the invention in the region of the connection of the at least one Shaped tube has a cross-section reduction on the holding element. As a result, the shaped tube, together with the holding element connected to it, can be bent or broken by the impact in the area of the cross-section reduction even at low loads.
Damit das Halteelement im Bereich der Querschnittsreduzierung schon bei niedrigen Belastungen zuverlässig verbogen wird oder bricht, kann die Querschnittsreduzierung im Bereich eines maximalen Biegemomentes oder einer maximalen Zugspannung angeordnet sein. Außerdem ist es auch möglich, die Materialstärke des Halteelements so auszuwählen, dass das Halteelement ohne Querschnittsreduzierung beim Aufprall zusammen mit dem Formrohr wegbiegt oder abbricht.So that the holding element in the area of the cross-section reduction is reliably bent or breaks even at low loads, the cross-section reduction can be arranged in the area of a maximum bending moment or a maximum tensile stress. In addition, it is also possible to select the material thickness of the holding element in such a way that the holding element bends away or breaks off together with the molded tube on impact without reducing the cross section.
Nachfolgend werden Ausführungsbeispiele anhand der beiliegenden Zeichnung näher erläutert.Exemplary embodiments are explained in more detail below with reference to the accompanying drawing.
Im Einzelnen zeigen:Show in detail:
Fig. 1 eine perspektivische Ansicht einer ersten An- bindungsmöglichkeit eines Formrohres mit einem Halteelement und einem Stutzen;1 shows a perspective view of a first possibility of connecting a molded tube with a holding element and a connecting piece;
Fig. 2 eine perspektivische Ansicht einer zweiten An- bindungsmöglichkeit eines Formrohres mit einem Halteelement und einem Stutzen.2 shows a perspective view of a second possibility of connecting a shaped tube with a holding element and a connecting piece.
Fig. 1 zeigt ein Formrohr 10, in das eine hier nicht näher dargestellte Antriebswelle zum Antrieb eines ebenfalls hier nicht näher dargestellten Wischarms eingesteckt werden kann. An das Formrohr 10 ist ein Halteelement 11 und ein Stumpf 12 angebunden. Das Halteelement 11 weist eine Aufnahmeöffnung 13 auf, in die hier nicht dargestellte Befestigungsmittel zur Befestigung des Halteelementes 11 mit einer hier nicht gezeigten Karosserie eingebracht werden können. Durch die Verbindung des Halteelementes 11 mit der Karosserie entsteht eine feste Einspannstelle 17. An den Stumpf 12 ist ein ebenfalls nicht gezeigtes Platinenrohr ancrimpbar, so dass der Stumpf 12 eine feste Einspannstelle 18 aufweist. Das Halteelement 11 und der Stumpf 12 sind durch Stege 14 und 15 mit dem Formrohr 10 ver- bunden. Die Stege 15 weisen jeweils ein Knie 16 auf, das mit dem Formrohr 10 verbunden ist. Wenn auf das Formrohr 10 eine Kraft F, beispielsweise eine Aufprallkraft beim Aufprall eines Fußgängers, wirkt, dann bewegt sich das Formrohr 10 infolge der Kraft F und infolge der an den Einspannstellen 17 und 18 wirkenden Reaktionskräfte in Richtung der Kraft F, wobei e- benfalls die Knie 16 in Richtung der Kraft F bewegt werden. Durch diese Bewegung der Knie 16 werden die Verbindungsstege 15 gestreckt, so dass dadurch die Verbindungsstege 14 eine starke Zugbeanspruchung erfahren und schließlich reißen. Infolge des Reißens der Verbindungsstege 14 werden auch die Verbindungsstege 15 überlastet. Schließlich brechen auch die Verbindungsstege 15 infolge der auf sie wirkenden Biegebeanspruchung, so dass das Formrohr 10 in Richtung der Kraft F dem Aufprall ausweicht.1 shows a molded tube 10 into which a drive shaft (not shown here) for driving a wiper arm (also not shown here) can be inserted. A holding element 11 and a stump 12 are connected to the shaped tube 10. The holding element 11 has a receiving opening 13, into which fastening means (not shown here) for fastening the holding element 11 with a body not shown here can be introduced. The connection of the holding element 11 to the body creates a fixed clamping point 17. A circuit board tube, also not shown, can be crimped onto the stump 12, so that the stump 12 has a fixed clamping point 18. The holding element 11 and the stump 12 are connected to the molded tube 10 by webs 14 and 15. prevented. The webs 15 each have a knee 16 which is connected to the molded tube 10. If a force F, for example an impact force when a pedestrian collides, acts on the molded tube 10, then the molded tube 10 moves in the direction of the force F as a result of the force F and as a result of the reaction forces acting on the clamping points 17 and 18, and likewise the knees 16 are moved in the direction of the force F. This movement of the knees 16 stretches the connecting webs 15, so that the connecting webs 14 are subjected to a strong tensile stress and finally tear. As a result of the tearing of the connecting webs 14, the connecting webs 15 are also overloaded. Finally, the connecting webs 15 also break as a result of the bending stress acting on them, so that the shaped tube 10 evades the impact in the direction of the force F.
Fig. 2 zeigt ein Formrohr 20, an das ein Halteelement 21 und ein Stumpf 22 angebunden sind. Das Halteelement 21 ist an eine nicht näher gezeigte Fahrzeugkarosserie befestigbar, so dass es eine feste Einspannstelle 27 vorhanden ist. Der Stumpf 22 ist an ein Platinenrohr ancrimpbar, so dass der Stumpf 22 eine feste Einspannstelle 28 aufweist. Das Halteelement 21 ist durch Verbindungsstege 23 und 24 mit dem Formrohr 20 verbunden. Wenn eine Aufprallkraft F auf das Formrohr 20 wirkt, so wirken in den Einspannstellen 27 und 28 entsprechende Reaktionskräfte. Aufgrund der Kraft F und der ihr entgegenwirkenden Reaktionskräfte wird der Verbindungssteg 23, der einen kleineren Querschnitt aufweist als der Verbindungssteg 24, sehr stark auf Zug beansprucht, so dass er infolge dieser Belastung reißt. Infolge der Überlastung bricht anschließend auch der Verbindungssteg 24, so dass das Formrohr 20 in Richtung der Kraft F dem Aufprall ausweicht. Die Kraft F wirkt bezüglich der Einspannstelle 27 mit einem Hebelarm hx, wohingegen die in den Verbindungssteg 23 wirkende Zugkraft mit dem Hebelarm h2 wirkt. Je größer hi oder je kleiner h2 ist, um so früher reißt der Verbindungssteg 23. Somit kann durch eine genaue Dimensio¬ nierung der Hebelarme hx und h2 die minimal erforderliche Kraft bestimmt werden, die für ein Versagen des Verbindungssteges 23 erforderlich ist. 2 shows a shaped tube 20 to which a holding element 21 and a stump 22 are connected. The holding element 21 can be fastened to a vehicle body, not shown in detail, so that there is a fixed clamping point 27. The stump 22 can be crimped onto a circuit board tube, so that the stump 22 has a fixed clamping point 28. The holding element 21 is connected to the molded tube 20 by connecting webs 23 and 24. If an impact force F acts on the molded tube 20, corresponding reaction forces act in the clamping points 27 and 28. Due to the force F and the reaction forces acting against it, the connecting web 23, which has a smaller cross section than the connecting web 24, is subjected to a great deal of tension, so that it tears as a result of this load. As a result of the overload, the connecting web 24 also breaks, so that the molded tube 20 in the direction of the force F evades the impact. The force F acts with respect the clamping point 27 with a lever arm h x , whereas the tensile force acting in the connecting web 23 acts with the lever arm h 2 . The larger hi or the smaller h is 2, by tearing the earlier of Getting Connected web 23. Thus, by accurate Dimensio ¬ discrimination of the lever arms h x and h 2, the minimum required force can be estimmt b that required for failure of the connecting web 23 is.

Claims

PATENTANSPRÜCHE
1. Scheibenwischvorrichtung für ein Kraftfahrzeug mit mindestens einem Formrohr (10, 20) zur Aufnahme einer Antriebswelle zum Antrieb von mindestens einem Wischarm, wobei das mindestens eine Formrohr (10, 20) an einem mit der Karosserie verbindbaren Halteelement (11, 21) und an einem ein Platinenrohr aufnehmenden Stumpf (12, 22) anbindbar ist, dadurch gekennzeichnet, dass zur Anbindung des mindestens einen Formrohres (10, 20) an das Halteelement (11, 21) und/oder an den Stumpf (12, 22) Verbindungsstege (14, 15, 23, 24) vorgesehen sind.1. Windscreen wiper device for a motor vehicle with at least one molded tube (10, 20) for receiving a drive shaft for driving at least one wiper arm, the at least one molded tube (10, 20) on a holding element (11, 21) that can be connected to the body and A stump (12, 22) receiving a sinker tube can be connected, characterized in that connecting webs (14.) for connecting the at least one shaped tube (10, 20) to the holding element (11, 21) and / or to the stump (12, 22) , 15, 23, 24) are provided.
2. Scheibenwischvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass eine auf das mindestens eine Formrohr (10, 20) und somit auf die Verbindungsstege (14, 15, 23, 24) wirkende Aufprallkraft (F) durch eine Hebelarmkonstruktion verstärkbar ist.2. Windshield wiper device according to claim 1, characterized in that an impact force (F) acting on the at least one shaped tube (10, 20) and thus on the connecting webs (14, 15, 23, 24) can be amplified by a lever arm construction.
3. Scheibenwischvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Verbindungsstege (14, 15, 23, 24) durch die auf die Hebelarmkonstruktion wirkende Aufprallkraft (F) über ihren gesamten Querschnitt auf Zug und/oder Biegung beanspruchbar sind.3. Windshield wiper device according to claim 2, characterized in that the connecting webs (14, 15, 23, 24) can be subjected to tension and / or bending over their entire cross section by the impact force (F) acting on the lever arm construction.
4. Scheibenwischvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass sie Verbindungsstege (14, 15, 23, 24) die jeweils verschiedene Querschnitte haben, aufweist. Scheibenwischvorrichtung nach einem der Ansprüche 2 bis4. Windscreen wiper device according to one of claims 1 to 3, characterized in that it has connecting webs (14, 15, 23, 24) which each have different cross sections. Windscreen wiper device according to one of claims 2 to
4, dadurch gekennzeichnet, dass die Verbindungsstege (15) kniehebelartig angeordnet sind.4, characterized in that the connecting webs (15) are arranged like a toggle lever.
Scheibenwischvorrichtung nach einem der Ansprüche 1 bisWindshield wiper device according to one of claims 1 to
5, dadurch gekennzeichnet, dass die Verbindungsstege (14, 15, 23, 24) Sollbruchstellen aufweisen.5, characterized in that the connecting webs (14, 15, 23, 24) have predetermined breaking points.
Scheibenwischvorrichtung für ein Kraftfahrzeug mit mindestens einem Formrohr zur Aufnahme einer Antriebswelle zum Antrieb von mindestens einem Wischarm, wobei das mindestens eine Formrohr an einem mit der Karosserie verbindbaren Halteelement anbindbar ist, dadurch gekennzeichnet, dass das Halteelement im Bereich der Anbindung des mindestens einen Formrohrs an das Halteelement eine Querschnittsreduzierung aufweist .Windscreen wiper device for a motor vehicle with at least one molded tube for receiving a drive shaft for driving at least one wiper arm, wherein the at least one molded tube can be connected to a holding element that can be connected to the body, characterized in that the holding element in the region of the connection of the at least one molded tube to the Holding element has a cross-sectional reduction.
Scheibenwischvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass sich die Querschnittsreduzierung im Bereich eines maximalen Biegemomentes oder einer maximalen Zugspannung befindet. Windscreen wiper device according to claim 7, characterized in that the cross-sectional reduction is in the range of a maximum bending moment or a maximum tensile stress.
EP04729602A 2003-06-30 2004-04-27 Windshield wiping device for a motor vehicle Withdrawn EP1646538A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10329568A DE10329568A1 (en) 2003-06-30 2003-06-30 Windscreen wiper device for a motor vehicle
PCT/DE2004/000878 WO2005000642A1 (en) 2003-06-30 2004-04-27 Windshield wiping device for a motor vehicle

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EP1646538A1 true EP1646538A1 (en) 2006-04-19

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EP04729602A Withdrawn EP1646538A1 (en) 2003-06-30 2004-04-27 Windshield wiping device for a motor vehicle

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US (1) US7941892B2 (en)
EP (1) EP1646538A1 (en)
JP (1) JP2007506593A (en)
KR (1) KR101068222B1 (en)
CN (1) CN100519282C (en)
BR (1) BRPI0403947A (en)
DE (1) DE10329568A1 (en)
WO (1) WO2005000642A1 (en)

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Publication number Publication date
KR101068222B1 (en) 2011-09-28
WO2005000642A1 (en) 2005-01-06
BRPI0403947A (en) 2005-03-15
JP2007506593A (en) 2007-03-22
US7941892B2 (en) 2011-05-17
CN100519282C (en) 2009-07-29
US20060123580A1 (en) 2006-06-15
DE10329568A1 (en) 2005-01-27
KR20060026032A (en) 2006-03-22
CN1701013A (en) 2005-11-23

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