WO1996018528A1 - Windshield wiper for vehicles - Google Patents

Windshield wiper for vehicles Download PDF

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Publication number
WO1996018528A1
WO1996018528A1 PCT/DE1995/001572 DE9501572W WO9618528A1 WO 1996018528 A1 WO1996018528 A1 WO 1996018528A1 DE 9501572 W DE9501572 W DE 9501572W WO 9618528 A1 WO9618528 A1 WO 9618528A1
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WO
WIPO (PCT)
Prior art keywords
wiper
crank
linkage
designed
rotation
Prior art date
Application number
PCT/DE1995/001572
Other languages
German (de)
French (fr)
Inventor
Ulrich Metz
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 WO1996018528A1 publication Critical patent/WO1996018528A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60SSERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00Cleaning of vehicles
    • B60S1/02Cleaning windscreens, windows or optical devices
    • B60S1/04Wipers or the like, e.g. scrapers
    • B60S1/06Wipers or the like, e.g. scrapers characterised by the drive
    • B60S1/16Means for transmitting drive
    • B60S1/18Means for transmitting drive mechanically
    • B60S1/24Means for transmitting drive mechanically by rotary cranks
    • B60S1/245Means for transmitting drive mechanically by rotary cranks with particular rod arrangements between the motor driven axle and the wiper arm axle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60SSERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00Cleaning of vehicles
    • B60S1/02Cleaning windscreens, windows or optical devices
    • B60S1/04Wipers or the like, e.g. scrapers
    • B60S1/32Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34Wiper arms; Mountings therefor
    • B60S1/3402Wiper arms; Mountings therefor with means for obtaining particular wiping patterns
    • B60S1/3409Wiper arms; Mountings therefor with means for obtaining particular wiping patterns the wiper arms consisting of two or more articulated elements

Definitions

  • the invention relates to a windshield wiper device for vehicles, in particular for the windshield of motor vehicles, of the type defined in the preamble of claim 1.
  • the wiper motor is a conventional electric motor which rotates in a predetermined direction of rotation and thereby drives a rotatably mounted crank.
  • the wiper linkage comprises an articulated rod which is articulated on the one hand on the crank and on the other hand on a rocker arm which is connected in a rotationally fixed manner to a wiper arm and is rotatable in a fixed pivot bearing.
  • the other wiper arm is also non-rotatably connected to a rocker which is rotatably held at a distance from the first rocker in a fixed pivot bearing.
  • the two Swings are coupled by a further articulated rod, which is articulated at one end to the swing arms.
  • a likewise known windshield wiper device for motor vehicles (DE 41 04 565 AI) has an electric wiper motor which is reversible in the direction of rotation and on the output shaft of which the wiper arm sits directly and in a rotationally fixed manner.
  • An electronic control device enables by reversing the direction of rotation of the wiper motor when the wiper field has reached an end position
  • Wiper blade a reciprocating wiping motion of the wiper arm.
  • Such a windshield wiper device has so far only been used in rear windows of motor vehicles, where only a wiper arm with a wiper blade is required.
  • the windshield wiper device according to the invention with the characterizing features of claim 1 has the advantage that the two wiper arms can be driven either in the same or in opposite directions by appropriate design of the drive linkage. By reversing the direction of rotation of the wiper motor, the intermediate storage that would otherwise normally be necessary in at least one drive linkage can be saved, as a result of which component tolerances are eliminated.
  • the drive linkage of one wiper arm as a four-bar linkage and the drive linkage of the other wiper arm as
  • Coupling linkage formed so the wiper arms through the oscillating wiper motor in the same wiping direction back and forth across the wiping field.
  • the angle of association that the two triangle legs passing through the third corner point and in each case one articulation point for the two drive linkages enclose can be selected at an acute or obtuse angle.
  • the four-bar linkage causes the wiper arm to move, which means that when the wiper blades are located one behind the other in the park position in the longitudinal direction of the front window, a larger one
  • Wiper surface of one wiper blade is achieved without the two wiper blades colliding.
  • the four-bar linkage consists of a coupling rod which is articulated on the one hand at the articulation point of the crank and on the other hand is firmly connected to the wiper arm and of a support rod which is articulated approximately centrally on the coupling rod and which is pivotably held in a fixed support bearing.
  • the coupling linkage is realized by a rocker arm that is firmly connected to the wiper arm and rotatable in a fixed swivel bearing and by an articulated rod that is articulated on the one hand on the rocker arm and on the other hand on the crank in the articulation point.
  • the two drive linkages of the wiper arms are each designed as coupling linkages, the wiper arms simultaneously wipe in the opposite wiping direction, and the wiper blades attached to them lie one above the other in the park position.
  • the crank and the assignment angle of the articulation points on the crank, as well as the drive linkage of the wiper arms accelerated starting of the wiper blade parked above and delayed starting of the wiper blade parked below can be achieved, so that no collision between the wiper blades can occur.
  • the range of motion of the joint rods is reduced, and there are small wiper angle tolerances and missing component tolerances and joint points.
  • the correspondence angle that the two triangular legs passing through the third corner point and one articulation point for each of the two drive rods enclose can be made at an acute or obtuse angle.
  • the articulation points on the crank can be arranged in a common plane of movement.
  • FIG. 1 excerpts of a windshield
  • Fig. 2 is an enlarged view of the
  • FIG. 3 shows a detail of a windscreen of a motor vehicle with a windshield wiper device with opposing wiper blades
  • FIG. 4 shows the same representation as in FIG. 1 with a wiper linkage modified in comparison in the windshield wiper device
  • FIG. Fig. 5 shows the same representation as in Fig. 3 with a modified wiper linkage of the windshield wiper device
  • the windshield wiper device shown in FIG. 1 for the front window 10 of a motor vehicle has two wiper arms 11, 12 with wiper blades 13, 14 attached to them. and an electric wiper motor 16 driving the wiper arms 11, 12 via a wiper linkage 15.
  • the wiper motor 16 is designed to be reversible in the direction of rotation, it being switched over in its direction of rotation by a control device (not shown here) when one of the two end positions reaches a predetermined angle of rotation range of approximately 180 °. In this way, the wiper motor 16 executes an oscillating rotary movement after starting in a rotation angle range of approximately 180 °.
  • This oscillating rotary movement of the wiper motor 16 is transmitted to the wiper linkage 15 via a transmission gear 17 and a crank 18. With a corresponding design of the transmission 17, the range of rotation angle of the wiper motor 16 can be expanded to almost 360 °.
  • the wiper linkage 15 consists of two drive linkages 21, 22, each of which is assigned to a wiper arm 11 or 12.
  • a pivot point 19 or 20 is provided on the crank 18 for each drive linkage 21, 22.
  • the articulation points 19, 20 form the corner points of a triangle, the third corner point of which the axis of rotation 23 of the crank 18 pierces.
  • the articulation points 19, 20 are realized by pivot joints, the pivot axes 21, 22 of which are aligned approximately parallel to the axis of rotation 23 of the crank 18. It is possible to design the articulation points 19, 20 as ball joints. That of the two, each through the axis of rotation 23 the crank angle 18 and one of the triangle legs passing through the two articulation points 19, 20 is designated by ot in FIG. 2. This assignment angle is acute at crank 18 in FIGS. 1 and 2 and is, for example, approximately 60 °. to
  • crank 18 is designed as an unequal leg angle plate.
  • the drive linkage 21 for the wiper arm 11 is designed as a four-bar linkage and the drive linkage 22 for the wiper arm 12 as a conventional coupling linkage.
  • the four-bar linkage (FIG. 2) consists of a coupling rod 26 which is articulated on the one hand at the articulation point 19 of the crank 18, that is to say is pivotably seated on a pivot pin 24 projecting there from the crank 18, and on the other hand is firmly connected to the wiper arm 11, as well as from a support rod 27 which on the one hand articulates on the coupling rod 26 via a pivot bearing 28 arranged on the coupling rod 26 between the crank 18 and the wiper arm 11 and on the other hand is pivotably held in a fixed support bearing 29.
  • the four-bar linkage (FIG. 2) consists of a coupling rod 26 which is articulated on the one hand at the articulation point 19 of the crank 18, that is to say is pivotably seated on a pivot pin 24 projecting there from the crank 18, and on the other hand is firmly
  • Coupling linkage 26 for the wiper arm 12 comprises a rocker arm 30 which is fixedly connected to the wiper arm 12 and which is rotatably held in a fixed pivot bearing 31, and an articulated rod 32 which is on the one hand on the rocker arm 30 and on the other hand in the articulation point 20 of the crank 18 is articulated, ie is pivotably seated on a pivot pin 25 projecting there from the crank 18 (FIG. 2).
  • the articulation on the rocker 30 takes place with a pivot bearing 35 arranged on the rocker 30.
  • the windshield wiper device is shown in the non-operating division.
  • the wiper arms 11, 12 with the wiper blades 13, 14 are in the park position, the wiper blades 13 lying one behind the other at the lower edge of the windshield 10, as seen along the edge of the windshield 10.
  • the wiper motor 16 switched on, it performs an oscillating rotary movement in a rotation angle range of approx. 180 °.
  • the crank 18 likewise executes an oscillating rotary movement via the transmission gear 17 and drives the wiper arms 11, 12 to a reciprocating pivoting movement via the two drive linkages 21, 22.
  • the wiper blades 13, 14 sweep over the windshield 10 in a predetermined wiping area 33 and 34, respectively.
  • the two wiping areas 33, 34 are shown in dash-dot lines in FIG. 1.
  • the wiper arm 11 performs an additional stroke movement as a result of the drive linkage 21 designed as a four-bar linkage, as a result of which the wiping field of the wiper blade 13 is enlarged so that it partially covers the wiping field 34 of the wiper blade 14. A collision of the wiper blades 13, 14 is excluded.
  • the assignment angle o (.
  • the articulation points 19.20 for the drive linkages 21.22 can be achieved on the one hand that the wiper arms 11,12 are in the desired parking position shown in Fig. 1 and on the other hand the wiper arms a harmonious acceleration curve over the Have wiping fields 33, 34.
  • the windshield wiper device shown in FIG. 4 differs from the windshield wiper device just described in that the coordination angle, that of the two by the axis of rotation 23 of the crank 18 designed as an angle plate and the two articulation points 19, 20 of the drive linkages 21, 22 on the crank 18 continuous triangle leg is included, is obtuse-angled. This requires that the rocker 30 of the drive linkage 22, which is designed as a coupling linkage, is moved to the other side of the wiper arm 12, so that the wiper arm 12 and the articulated rod 32 cross. Otherwise, the structure and mode of operation are as described above, so that the same components are provided with the same reference numerals as in FIGS. 1 and 2.
  • the wiper arms 11, 12 with wiper blades 13, 14 are not moved in the same direction but in opposite directions over the windshield 10.
  • the wiper fields of the wiper blades 13, 14 are designated 33 'and 34.
  • the wiper blades 13, 14 are in their parking position at the lower edge of the windshield 10 in the middle of the windshield 10 and one above the other in the wiping direction.
  • the assignment angle ol of the articulation points 19, 20 for the wiper linkages 21 ', 22 on the crank 18' is selected to be bluntly inclusive, in the example approximately 145 °, and the drive linkages 21 articulated thereon ', 22 are identical and each designed as a coupling linkage, as already described for FIG. 1.
  • the articulation points 19, 20 of the drive linkages 21 ', 22 on the crank 18' lie on the same side of the crank 18 ', so that the link rods 32 in the two drive linkages 21', 22 move in the same plane.
  • a suitable choice of the position of the crank 18 'in the park position of the wiper arms 11, 12, the assignment angle oC on the crank 18' and the lengths of the joint rods 32 in the two drive linkages 21 ', 22 can accelerate the start of the wiper blade 13 and 12 parked above a delayed start of the wiper blade 14 parked below can be achieved, so that no collision occurs between the wiper blades 13, 14.
  • FIG. 5 shows the same windshield wiper device as in FIG. 3 with a slightly modified wiper linkage 15.
  • the assignment angle cxC of the two by the axis of rotation 23 of the crank 18 formed as an angle plate and the two articulation points 19, 20 of the drive linkages 21 'and 22 on the crank 18' triangle leg passing through is not obtuse but acute-angled here.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

A windshield wiper for vehicles, in particular for the front window (10) of motor vehicles, has an electric wiper motor (16) that drives two wiper arms (11, 12) back and forth with a crank (18) and a rod assembly (15). In order to accomplish different wiping concepts, the direction of rotation of the wiper motor (16) may be reversed in an angle of rotation range smaller than 360° and the crank (18) has two articulation points (19, 20) for the driving rod assembly (21, 22) of each wiper arm (11, 12). The articulation points (19, 20) form the corners of a triangle and the axis of rotation (23) of the crank (18) extends through the third corner of the triangle. When the driving rod assemblies (21, 22) are designed as a four-bar linkage and coupling rod assemblies, the wiper arms are driven in the same direction, and when the driving rod assemblies (21, 22) are designed as two coupling rod assemblies, the wiper arms (11, 12) are driven in opposite directions.

Description

96/18528 PC17-DE95/01572 96/18528 PC17-DE95 / 01572
Scheibenwischvomchtung für FahrzeugeWindshield wiper device for vehicles
Stand der TechnikState of the art
Die Erfindung geht aus von einer Scheibenwischvomchtung für Fahrzeuge, insbesondere für die Frontscheibe von Kraftfahrzeugen, der im Oberbegriff des Anspruchs 1 definierten Gattung.The invention relates to a windshield wiper device for vehicles, in particular for the windshield of motor vehicles, of the type defined in the preamble of claim 1.
Bei einer bekannten Scheibenwischvorrichtung dieser Art IDE 23 11 737 AI) ist der Wischermotor ein üblicher Elektromotor, der in einer vorgegebenen Drehrichtung rotiert und dabei eine drehbar gelagerte Kurbel umlaufend antreibt. Das Wischergestänge umfaßt eine Gelenkstange, die einerseits an der Kurbel und andererseits an einer drehfest mit einem Wischerarm verbundenen, in einem ortsfesten Schwenklager drehbaren Schwinge angelenkt ist. Der andere Wischerarm ist ebenfalls drehfest mit einer Schwinge verbunden, die im Abstand von der ersten Schwinge in einem ortsfesten Schwenklager drehbar gehalten ist. Die beiden Schwingen sind durch eine weitere Gelenkstange, die jeweils mit einem Ende an den Schwingen angelenkt ist, gekoppelt.In a known windshield wiper device of this type IDE 23 11 737 AI), the wiper motor is a conventional electric motor which rotates in a predetermined direction of rotation and thereby drives a rotatably mounted crank. The wiper linkage comprises an articulated rod which is articulated on the one hand on the crank and on the other hand on a rocker arm which is connected in a rotationally fixed manner to a wiper arm and is rotatable in a fixed pivot bearing. The other wiper arm is also non-rotatably connected to a rocker which is rotatably held at a distance from the first rocker in a fixed pivot bearing. The two Swings are coupled by a further articulated rod, which is articulated at one end to the swing arms.
Eine ebenfalls bekannte Scheibenwischvorrichtung für Kraftfahrzeuge (DE 41 04 565 AI) weist einen drehrichtungsumkehrbaren elektrischen Wischermotor auf, auf dessen Abtriebswelle der Wischerarm unmittelbar und drehfest sitzt. Eine elektronische Steuervorrichtung ermöglicht durch Drehrichtungsumkehr des Wischermotors bei Erreichen einer Endlage des Wischfeldes durch dasA likewise known windshield wiper device for motor vehicles (DE 41 04 565 AI) has an electric wiper motor which is reversible in the direction of rotation and on the output shaft of which the wiper arm sits directly and in a rotationally fixed manner. An electronic control device enables by reversing the direction of rotation of the wiper motor when the wiper field has reached an end position
Wischblatt eine hin- und hersehende Wischbewegung des Wischerarms. Eine solche Scheibenwischevorrichtung wird bislang nur bei Heckfenstern von Kraftfahrzeugen eingesetzt, wo nur ein Wischerarm mit Wischblatt erforderlich ist.Wiper blade a reciprocating wiping motion of the wiper arm. Such a windshield wiper device has so far only been used in rear windows of motor vehicles, where only a wiper arm with a wiper blade is required.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Scheibenwischvorrichtung mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, daß die beiden Wischerarme durch entsprechende Ausbildung des Antriebsgestänges wahlweise gleich- oder gegenlaufend angetrieben werden können. Durch die Drehrichtungsumkehr des Wischermotors können die sonst üblicherweise in mindestens einem Antriebsgestänge notwendigen Zwischenlager eingespart werden, wodurch gleichzeitig Bauteiltoleranzen wegfallen.The windshield wiper device according to the invention with the characterizing features of claim 1 has the advantage that the two wiper arms can be driven either in the same or in opposite directions by appropriate design of the drive linkage. By reversing the direction of rotation of the wiper motor, the intermediate storage that would otherwise normally be necessary in at least one drive linkage can be saved, as a result of which component tolerances are eliminated.
Durch die in den weiteren Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Scheibenwischvorrichtung möglich.The measures listed in the further claims allow advantageous developments and improvements of the windshield wiper device specified in claim 1.
Wird gemäß einer ersten Ausführungsform der Erfindung das Antriebsgestänge des einen Wischerarms als Viergelenk und das Antriebsgestänge des anderen Wischerarms alsAccording to a first embodiment of the invention, the drive linkage of one wiper arm as a four-bar linkage and the drive linkage of the other wiper arm as
Koppelgestänge ausgebildet, so werden die Wischerarme durch den oszillierenden Wischermotor in gleicher Wischrichtung über das Wischfeld hin- und zurückgeführt. Der Zuordnungswinkel, den die beiden durch den dritten Eckpunkt und jeweils einem Anlenkpunkt für die beiden Antriebsgestänge hindurchgehenden Dreieckschenkel miteinander einschließen, kann dabei spitz- oder stumpfwinklig gewählt werden. Zusätzlich bewirkt das Viergelenk Hubbewegung des Wischerarms, wodurch bei in Parkstellung in Längsrichtung der Frontscheibe hintereinanderliegenden Wischblättern eine größereCoupling linkage formed, so the wiper arms through the oscillating wiper motor in the same wiping direction back and forth across the wiping field. The angle of association that the two triangle legs passing through the third corner point and in each case one articulation point for the two drive linkages enclose can be selected at an acute or obtuse angle. In addition, the four-bar linkage causes the wiper arm to move, which means that when the wiper blades are located one behind the other in the park position in the longitudinal direction of the front window, a larger one
Wischfläche des einen Wischblattes erzielt wird, ohne daß die beiden Wischblätter kollidieren.Wiper surface of one wiper blade is achieved without the two wiper blades colliding.
Gemäß einer vorteilhaften Ausführungsform der Erfindung besteht dabei das Viergelenk aus einer Koppelstange, die einerseits am Anlenkpunkt der Kurbel angelenkt und andererseits mit dem Wischerarm fest verbunden ist und aus einer etwa mittig an der Koppelstange gelenkig angreifenden Stützstange, die schwenkbar in einem festen Stützlager gehalten ist. Das Koppelgestänge wird durch eine fest mit dem Wischerarm verbundene, in einem ortsfesten Schwenklager drehbare Schwinge und durch eine Gelenkstange realisiert, die einerseits an der Schwinge und andererseits an der Kurbel im Anlenkpunkt angelenkt ist.According to an advantageous embodiment of the invention, the four-bar linkage consists of a coupling rod which is articulated on the one hand at the articulation point of the crank and on the other hand is firmly connected to the wiper arm and of a support rod which is articulated approximately centrally on the coupling rod and which is pivotably held in a fixed support bearing. The coupling linkage is realized by a rocker arm that is firmly connected to the wiper arm and rotatable in a fixed swivel bearing and by an articulated rod that is articulated on the one hand on the rocker arm and on the other hand on the crank in the articulation point.
Werden gemäß einer zweiten Ausführungsform der Erfindung die beiden Antriebsgestänge der Wischerarme jeweils als Koppelgestänge ausgebildet, so wischen die Wischarme gleichzeitig in gegensinnniger Wischrichtung, und die an ihnen befestigten Wischblätter liegen in Parkstellung mittig übereinander. Durch geeignete Ausbildung der Parkstellung, der Kurbel und des Zuordnungwinkels der Anlenkpunkte auf der Kurbel, sowie der Antriebsgestänge der Wischerarme kann ein beschleunigtes Anfahren des oberhalb parkenden Wischblattes und ein verzögertes Anlaufen des unterhalb parkenden Wischblattes erreicht werden, so daß keine Kollision zwischen den Wischblättern auftreten kann. Gegenüber herkömmlichen Wischergetrieben für gegenläufige Wischerarmbewegung wird der Bewegungsbereich der Gelenkstangen reduziert, und es ergeben sich kleine Wischwinkeltoleranzen und wegfallende Bauteiltoleranzen und Gelenkpunkte. Auch hier kann der Zuordnungswinkel, den die beiden durch den dritten Eckpunkt und jeweils einem Anlenkpunkt für die beiden Antriebsgestänge hindurchgehenden Dreieckschenkel miteinander einschließen, spitz- oder stumpfwinklig ausgeführt werden. Im letzten Fall können die Anlenkpunkte auf der Kurbel in einer gemeinsamen Bewegungsebene angeordnet werden.If, according to a second embodiment of the invention, the two drive linkages of the wiper arms are each designed as coupling linkages, the wiper arms simultaneously wipe in the opposite wiping direction, and the wiper blades attached to them lie one above the other in the park position. By suitable design of the parking position, the crank and the assignment angle of the articulation points on the crank, as well as the drive linkage of the wiper arms, accelerated starting of the wiper blade parked above and delayed starting of the wiper blade parked below can be achieved, so that no collision between the wiper blades can occur. Compared to conventional wiper gearboxes for opposing wiper arm movement, the range of motion of the joint rods is reduced, and there are small wiper angle tolerances and missing component tolerances and joint points. Here, too, the correspondence angle that the two triangular legs passing through the third corner point and one articulation point for each of the two drive rods enclose can be made at an acute or obtuse angle. In the latter case, the articulation points on the crank can be arranged in a common plane of movement.
Zeichnungdrawing
Die Erfindung ist anhand von in der Zeichnung dargestellten Ausführungsbeispielen in der nachfolgenden Beschreibung näher erläutert. Es zeigen:The invention is explained in more detail in the following description with reference to exemplary embodiments shown in the drawing. Show it:
Fig. 1 ausschnittweise eine Frontscheibe einesFig. 1 excerpts of a windshield
Kraftfahrzeugs mit einer Scheibenwischvorrichtung mit zwei gleichlaufenden Wischblättern,Motor vehicle with a windshield wiper device with two synchronous wiper blades,
Fig. 2 eine vergrößerte Darstellung desFig. 2 is an enlarged view of the
Ausschnitts II in Fig. 1,Section II in Fig. 1,
Fig. 3 ausschnittweise eine Frontscheibe eines Kraftfahrzeugs mit einer Scheibenwisch- Vorrichtung mit gegenlaufenden Wischblättern,3 shows a detail of a windscreen of a motor vehicle with a windshield wiper device with opposing wiper blades,
Fig. 4 eine gleiche Darstellung wie in Fig. 1 mit einem demgegenüber modifizierten Wischergestänge in der Scheibenwischvorrichtung, Fig. 5 eine gleiche Darstellung wie in Fig. 3 mit einem demgegenüber modifizierten Wischergestänge der Scheibenwischvorrichtung4 shows the same representation as in FIG. 1 with a wiper linkage modified in comparison in the windshield wiper device, FIG. Fig. 5 shows the same representation as in Fig. 3 with a modified wiper linkage of the windshield wiper device
Beschreibung der AusführungsbeispieleDescription of the embodiments
Die in Fig. 1 dargestellte Scheibenwischvorrichtung für die Frontscheibe 10 eines Kraftfahrzeugs weist zwei Wischerarme 11,12 mit daran befestigten Wischblättern 13,14. sowie einen die Wischerarme 11,12 über ein Wischergestänge 15 antreibenden elektrischen Wischermotor 16 auf. Der Wischermotor 16 ist drehrichtungsumkehrbar ausgebildet, wobei er von einer hier nicht dargestellten Steuervorrichtung bei Erreichen einer der beiden Endlagen eines vorgegebenen Drehwinkelbereichs von ca. 180° in seiner Drehrichtung umgeschaltet wird. Auf diese Weise führt der Wischermotor 16 nach Start in einem Drehwinkelbereich von ca. 180° eine oszillierende Drehbewegung aus. Diese oszillierende Drehbewegung des Wischermotors 16 wird über ein Übersetzungsgetriebe 17 und eine Kurbel 18 auf das Wischergestänge 15 übertragen. Bei entsprechender Ausbildung des Übersetzungsgetriebes 17 kann der Drehwinkelbereich des Wischermotors 16 auf nahezu 360° ausgedehnt werden.The windshield wiper device shown in FIG. 1 for the front window 10 of a motor vehicle has two wiper arms 11, 12 with wiper blades 13, 14 attached to them. and an electric wiper motor 16 driving the wiper arms 11, 12 via a wiper linkage 15. The wiper motor 16 is designed to be reversible in the direction of rotation, it being switched over in its direction of rotation by a control device (not shown here) when one of the two end positions reaches a predetermined angle of rotation range of approximately 180 °. In this way, the wiper motor 16 executes an oscillating rotary movement after starting in a rotation angle range of approximately 180 °. This oscillating rotary movement of the wiper motor 16 is transmitted to the wiper linkage 15 via a transmission gear 17 and a crank 18. With a corresponding design of the transmission 17, the range of rotation angle of the wiper motor 16 can be expanded to almost 360 °.
Das Wischergestänge 15 besteht aus zwei Antriebsgestängen 21,22, die jeweils einem Wischerarm 11 bzw. 12 zugeordnet sind. Für jedes Antriebsgestänge 21,22 ist auf der Kurbel 18 ein Anlenkpunkt 19 bzw. 20 vorgesehen. Die Anlenkpunkte 19,20 bilden die Eckpunkte eines Dreiecks, dessen dritter Eckpunkt von der Drehachse 23 der Kurbel 18 durchstoßen wird. Die Anlenkpunkte 19,20 sind durch Zapfengelenke realisiert, deren Schwenkachsen 21,22 in etwa parallel zur Drehachse 23 der Kurbel 18 ausgerichtet sind. Eine Ausbildung der Anlenkpunkte 19,20 als Kugelgelenke ist möglich. Der von den beiden, jeweils durch die Drehachse 23 der Kurbel 18 und einen der beiden Anlenkpunkte 19,20 hindurchgehenden Dreiecksschenkel eingeschlossene Zuordnungswinkel ist in Fig. 2 mit ot bezeichnet. Dieser Zuordnungswinkel ist bei der Kurbel 18 in Fig. 1 und 2 spitzwinklig und beträgt beispielsweise ca. 60° . ZurThe wiper linkage 15 consists of two drive linkages 21, 22, each of which is assigned to a wiper arm 11 or 12. A pivot point 19 or 20 is provided on the crank 18 for each drive linkage 21, 22. The articulation points 19, 20 form the corner points of a triangle, the third corner point of which the axis of rotation 23 of the crank 18 pierces. The articulation points 19, 20 are realized by pivot joints, the pivot axes 21, 22 of which are aligned approximately parallel to the axis of rotation 23 of the crank 18. It is possible to design the articulation points 19, 20 as ball joints. That of the two, each through the axis of rotation 23 the crank angle 18 and one of the triangle legs passing through the two articulation points 19, 20 is designated by ot in FIG. 2. This assignment angle is acute at crank 18 in FIGS. 1 and 2 and is, for example, approximately 60 °. to
Realisierung dieses Zuordnungswinkels <-*i ist die Kurbel 18 als ungleichschenkelige Winkelplatte ausgebildet.Realization of this assignment angle <- * i, the crank 18 is designed as an unequal leg angle plate.
Das Antriebsgestänge 21 für den Wischerarm 11 ist als Viergelenk und das Antriebsgestänge 22 für den Wischerarm 12 als übliches Koppelgestänge ausgebildet. Das Viergelenk (Fig. 2) besteht aus einer Koppelstange 26, die einerseits am Anlenkpunkt 19 der Kurbel 18 angelenkt ist, also schwenkbar auf einem dort an der Kurbel 18 abstehenden Schwenkzapfen 24 sitzt, und andererseits mit dem Wischerarm 11 fest verbunden ist, sowie aus einer Stützstange 27, die einerseits über ein zwischen Kurbel 18 und Wischerarm 11 an der Koppelstange 26 angeordnetes Schwenklager 28 gelenkig an der Koppelstange 26 angreift und andererseits schwenkbar in einem festen Stützlager 29 gehalten ist. DasThe drive linkage 21 for the wiper arm 11 is designed as a four-bar linkage and the drive linkage 22 for the wiper arm 12 as a conventional coupling linkage. The four-bar linkage (FIG. 2) consists of a coupling rod 26 which is articulated on the one hand at the articulation point 19 of the crank 18, that is to say is pivotably seated on a pivot pin 24 projecting there from the crank 18, and on the other hand is firmly connected to the wiper arm 11, as well as from a support rod 27 which on the one hand articulates on the coupling rod 26 via a pivot bearing 28 arranged on the coupling rod 26 between the crank 18 and the wiper arm 11 and on the other hand is pivotably held in a fixed support bearing 29. The
Koppelgestänge 26 für den Wischerarm 12 (Fig. 1) umfaßt eine fest mit dem Wischarm 12 verbundene Schwinge 30, die in einem ortsfesten Schwenklager 31 drehbar gehalten ist, und eine Gelenkstange 32, die einerseits an der Schwinge 30 und andererseits im Anlenkpunkt 20 der Kurbel 18 angelenkt ist, d.h. schwenkbar auf einem dort von der Kurbel 18 abstehenden Schwenkzapfen 25 (Fig. 2) sitzt. Die Anlenkung an der Schwinge 30 erfolgt mit einem auf der Schwinge 30 angeordneten Schwenklager 35.Coupling linkage 26 for the wiper arm 12 (FIG. 1) comprises a rocker arm 30 which is fixedly connected to the wiper arm 12 and which is rotatably held in a fixed pivot bearing 31, and an articulated rod 32 which is on the one hand on the rocker arm 30 and on the other hand in the articulation point 20 of the crank 18 is articulated, ie is pivotably seated on a pivot pin 25 projecting there from the crank 18 (FIG. 2). The articulation on the rocker 30 takes place with a pivot bearing 35 arranged on the rocker 30.
In Fig. 1 und 2 ist die Scheibenwischvorrichtung in Außerbetriebsteilung dargestellt. Die Wischerarme 11,12 mit den Wischblättern 13,14 liegen in Parkstellung, wobei die Wischblätter 13 am unteren Rand der Frontscheibe 10, längs des Randes der Frontscheibe 10 gesehen, hintereinanderliegen. Wird nunmehr der Wischermotor 16 eingeschaltet, so führt er oszillierende Drehbewegung in einem Drehwinkelbereich von ca. 180° aus. Über das Übersetzungsgetriebe 17 führt die Kurbel 18 ebenfalls eine oszillierende Drehbewegung aus und treibt über die beiden Antriebsgestänge 21,22 die Wischerarme 11,12 zu einer hin- und hergehende Schwenkbewegung an. Die Wischblätter 13,14 überstreichen die Frontscheibe 10 in einem vorgebenen Wischfeld 33 bzw. 34. Die beiden Wischfelder 33,34 sind in Fig. 1 strichpunktiert eingezeichnet. Wie deutlich zu sehen ist, führt der Wischerarm 11 infolge des als Viergelenk ausgebildeten Antriebsgestänges 21 eine zusätzliche Hubbewebung aus, wodurch das Wischfeld des Wischblattes 13 so vergrößert wird, daß es teilweise das Wischfeld 34 des Wischblattes 14 überdeckt. Eine Kollision der Wischblätter 13,14 ist dabei ausgeschlossen. Durch die Wahl des Zuordnungswinkels o(. der Anlenkpunkte 19,20 für die Antriebsgestänge 21,22 kann einerseits erreicht werden, daß die Wischerarme 11,12 in der gewünschten, in Fig. 1 dargestellten Parkstellung liegen und andererseits die Wischerarme einen harmonischen Beschleunigungsverlauf über die Wischfelder 33,34 haben.1 and 2, the windshield wiper device is shown in the non-operating division. The wiper arms 11, 12 with the wiper blades 13, 14 are in the park position, the wiper blades 13 lying one behind the other at the lower edge of the windshield 10, as seen along the edge of the windshield 10. Now the wiper motor 16 switched on, it performs an oscillating rotary movement in a rotation angle range of approx. 180 °. The crank 18 likewise executes an oscillating rotary movement via the transmission gear 17 and drives the wiper arms 11, 12 to a reciprocating pivoting movement via the two drive linkages 21, 22. The wiper blades 13, 14 sweep over the windshield 10 in a predetermined wiping area 33 and 34, respectively. The two wiping areas 33, 34 are shown in dash-dot lines in FIG. 1. As can be clearly seen, the wiper arm 11 performs an additional stroke movement as a result of the drive linkage 21 designed as a four-bar linkage, as a result of which the wiping field of the wiper blade 13 is enlarged so that it partially covers the wiping field 34 of the wiper blade 14. A collision of the wiper blades 13, 14 is excluded. By choosing the assignment angle o (. The articulation points 19.20 for the drive linkages 21.22 can be achieved on the one hand that the wiper arms 11,12 are in the desired parking position shown in Fig. 1 and on the other hand the wiper arms a harmonious acceleration curve over the Have wiping fields 33, 34.
Die in Fig. 4 dargestellte Scheibenwischvorrichtung unterscheidet sich von der eben beschriebenen Scheibenwischvorrichtung dadurch, daß der Zuordnungswinkel , der von den beiden durch die Drehachse 23 der als Winkelplatte ausgebildeten Kurbel 18 und den beiden Anlenkpunkten 19,20 der Antriebsgestänge 21,22 auf der Kurbel 18 hindurchgehenden Dreieckschenkel eingeschlossen ist, stumpfwinklig ausgeführt ist. Dies macht erforderlich, daß die Schwinge 30 des als Koppelgestänge ausgebildeten Antriebsgestänges 22 auf die andere Seite des Wischerarms 12 verlegt wird, so daß sich Wischerarm 12 und Gelenkstange 32 kreuzen. Im übrigen sind Aufbau und Wirkungsweise wie vorstehend beschrieben, so daß gleiche Bauteile mit gleichen Bezugszeichen wie in Fig. 1 und 2 versehen sind. Die in Fig. 3 dargestellte Scheibenwischvorrichtung unterscheidet sich von der in Verbindung mit Fig. 1 und 2 beschriebenen Scheibenwischvorrichtung dadurch, daß die Wischarme 11,12 mit Wischblättern 13,14 nicht gleichsinnig sondern gegensinnig über die Frontscheibe 10 bewegt werden. Die Wischfelder der Wischblätter 13,14 sind mit 33' und 34 bezeichnet. Bei Außerbetrieb der Scheibenwischvorrichtung liegen die Wischblätter 13,14 in ihrer Parkstellung am unteren Rand der Frontscheibe 10 mittig in der Frontscheibe 10 und in Wischrichtung übereinander.The windshield wiper device shown in FIG. 4 differs from the windshield wiper device just described in that the coordination angle, that of the two by the axis of rotation 23 of the crank 18 designed as an angle plate and the two articulation points 19, 20 of the drive linkages 21, 22 on the crank 18 continuous triangle leg is included, is obtuse-angled. This requires that the rocker 30 of the drive linkage 22, which is designed as a coupling linkage, is moved to the other side of the wiper arm 12, so that the wiper arm 12 and the articulated rod 32 cross. Otherwise, the structure and mode of operation are as described above, so that the same components are provided with the same reference numerals as in FIGS. 1 and 2. The windshield wiper device shown in FIG. 3 differs from the windshield wiper device described in connection with FIGS. 1 and 2 in that the wiper arms 11, 12 with wiper blades 13, 14 are not moved in the same direction but in opposite directions over the windshield 10. The wiper fields of the wiper blades 13, 14 are designated 33 'and 34. When the windshield wiper device is not in operation, the wiper blades 13, 14 are in their parking position at the lower edge of the windshield 10 in the middle of the windshield 10 and one above the other in the wiping direction.
Um diese gegenläufige Wischrichtung der Wischerarme 11,12 zu erreichen, ist der Zuordnungswinkel ol der Anlenkpunkte 19,20 für die Wischergestänge 21' , 22 auf der Kurbel 18' stumpf inklig gewählt, im Beispiel ca. 145°, und die daran angelenkten Antriebsgestänge 21' , 22 sind identisch und jeweils als Koppelgestänge, wie es bereits zu Fig. 1 beschrieben ist, ausgeführt. Die Anlenkpunkte 19,20 der Antriebsgestänge 21 ',22 auf der Kurbel 18' liegen auf derselben Seite der Kurbel 18', so daß die Gelenkstangen 32 in den beiden Antriebsgestängen 21 ',22 sich in der gleichen Ebene bewegen. Durch geeignete Wahl der Lage der Kurbel 18' in der Parkstellung der Wischerarme 11,12, des Zuordnungswinkels oC auf der Kurbel 18' und die Längen der Gelenkstangen 32 in den beiden Antriebsgestängen 21 ',22 kann ein beschleunigtes Anlaufen des oberhalb parkenden Wischblattes 13 und ein verzögertes Anlaufen des unterhalb parkenden Wischblattes 14 erreicht werden, so daß keine Kollision zwischen den Wischblättern 13,14 auftritt.In order to achieve this opposite wiping direction of the wiper arms 11, 12, the assignment angle ol of the articulation points 19, 20 for the wiper linkages 21 ', 22 on the crank 18' is selected to be bluntly inclusive, in the example approximately 145 °, and the drive linkages 21 articulated thereon ', 22 are identical and each designed as a coupling linkage, as already described for FIG. 1. The articulation points 19, 20 of the drive linkages 21 ', 22 on the crank 18' lie on the same side of the crank 18 ', so that the link rods 32 in the two drive linkages 21', 22 move in the same plane. A suitable choice of the position of the crank 18 'in the park position of the wiper arms 11, 12, the assignment angle oC on the crank 18' and the lengths of the joint rods 32 in the two drive linkages 21 ', 22 can accelerate the start of the wiper blade 13 and 12 parked above a delayed start of the wiper blade 14 parked below can be achieved, so that no collision occurs between the wiper blades 13, 14.
In Fig. 5 ist die gleiche Scheibenwischvorrichtung wie in Fig. 3 mit einem etwas modifizierten Wischergestänge 15 dargestellt. Der Zuordnungwinkel cxC , der von den beiden durch die Drehachse 23 der als Winkelplatte ausgebildeten Kurbel 18 und den beiden Anlenkpunkten 19,20 der Antriebsgestänge 21' und 22 auf der Kurbel 18' hindurchgehenden Dreieckschenkel eingeschlossen ist, ist hier nicht stumpf- sondern spitzwinklig ausgeführt. Dies zwingt allerdings dazu, in dem als Koppelgestänge ausgebildeten Antriebsgestänge 22 die mit der Gelenkstange 32 verbundene Schwinge 30 im Schwenklager 31 so anzuordnen, daß sie auf der im Vergleich zu Fig. 3 anderen Seite des Wischerarms 15 absteht und somit Wischerarm 12 und Gelenkstange 32 sich kreuzen. 5 shows the same windshield wiper device as in FIG. 3 with a slightly modified wiper linkage 15. The assignment angle cxC of the two by the axis of rotation 23 of the crank 18 formed as an angle plate and the two articulation points 19, 20 of the drive linkages 21 'and 22 on the crank 18' triangle leg passing through is not obtuse but acute-angled here. However, this forces the rocker arm 30 connected to the articulated rod 32 to be arranged in the pivot bearing 31 in the drive rod 22 designed as a coupling rod such that it projects on the other side of the wiper arm 15 compared to FIG. 3 and thus wiper arm 12 and articulated rod 32 are separate cross.

Claims

Ansυrüche Claims
1. Scheibenwischvorrichtung für Fahrzeuge, insbesondere für die Frontscheibe von Kraftfahrzeugen, mit zwei Wischerarmen (11,12) und mit einem elektrischen1. Windshield wiper device for vehicles, in particular for the windshield of motor vehicles, with two wiper arms (11, 12) and with an electric one
Wischermotor (16), der über eine Kurbel (18) und ein Wischergestänge (15) die beiden Wischerarme (11,12) in einer hin- und hergehenden Wischbewegung antreibt, dadurch gekennzeichnet, daß der Wischermotor (16) drehrichtungsumkehrbar ausgebildet ist und in einemWiper motor (16) which drives the two wiper arms (11, 12) in a reciprocating wiping motion via a crank (18) and a wiper linkage (15), characterized in that the wiper motor (16) is designed to be reversible in the direction of rotation and in one
Drehwinkelbereich von kleiner 360° oszilliert, daß die Kurbel (18) zwei Anlenkpunkte (19,20) für je ein Antriebsgestänge ( 21 , 22 ;21 ' , 22 ) eines Wischerarms (11,12) aufweist und daß die Anlenkpunkte (19,20) die Eckpunkte eines Dreiecks bilden, dessen dritterAngle of rotation range of less than 360 ° oscillates that the crank (18) has two articulation points (19, 20) for each drive linkage (21, 22; 21 ', 22) of a wiper arm (11, 12) and that the articulation points (19, 20 ) form the corner points of a triangle, the third
Eckpunkt von der Drehachse (23) der Kurbel (18; 18' ) durchstoßen wird. 1 1Corner point of the axis of rotation (23) of the crank (18; 18 ') is pierced. 1 1
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Antriebsgestänge (21) des einen Wischerarms (11) als Viergelenk und das Antriebsgestänge (22) des anderen Wischerarms (12) als Koppelgestänge δ ausgebildet ist (Fig. 1 und 4).2. Device according to claim 1, characterized in that the drive linkage (21) of one wiper arm (11) as a four-bar linkage and the drive linkage (22) of the other wiper arm (12) is designed as a coupling linkage δ (Fig. 1 and 4).
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß das als Viergelenk ausgebildete Antriebsgestänge (21) eine einerseits am Anlenkpunkt (19) der Kurbel 0 (18) angelenkte und andererseits mit dem Wischerarm3. Device according to claim 2, characterized in that the drive linkage (21) designed as a four-bar linkage is articulated on the one hand at the articulation point (19) of the crank 0 (18) and on the other hand with the wiper arm
(11) fest verbundene Koppelstange (26) und eine dazwischen an der Koppelstange (26) gelenkig angreifende Stützstange (27) aufweist, die schwenkbar in einem festen Stützlager (29) gehalten ist. 5(11) has a fixedly connected coupling rod (26) and a support rod (27) which acts on the coupling rod (26) in an articulated manner and which is pivotably held in a fixed support bearing (29). 5
Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jedes Antriebsgestänge (21 ' ,22) eines Wischerarms (11,12) als Koppelgestänge ausgebildet ist (Fig. 3 und 5). 0Apparatus according to claim 1, characterized in that each drive linkage (21 ', 22) of a wiper arm (11, 12) is designed as a linkage linkage (Figs. 3 and 5). 0
5. Vorrichtung nach einem der Ansprüche 2 - 4, dadurch gekennzeichnet, daß das als Koppelgestänge ausgebildete Antriebsgestänge (22;21' ,22) eine fest mit dem Wischerarm (12; 11, 12) verbundene, in einem 5 ortsfesten Schwenklager (31) drehbare Schwinge (30) und eine Gelenkstange (32) aufweist, die einerseits an der Schwinge ( 30 ) und andererseits an der Kurbel (18;18' ) im Anlenkpunkt (20;19,20) angelenkt ist.5. Device according to one of claims 2-4, characterized in that the drive linkage designed as a coupling linkage (22; 21 ', 22) is fixedly connected to the wiper arm (12; 11, 12), in a 5 fixed pivot bearing (31) has rotatable rocker (30) and an articulated rod (32) which is articulated on the one hand on the rocker (30) and on the other hand on the crank (18; 18 ') in the articulation point (20; 19, 20).
0 6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß der von den beiden, jeweils durch die Drehachse (23) der Kurbel (18' ) und einem der Anlenkpunkte (19,20) hindurchgehenden Dreieckschenkeln eingeschlossene Zuordnungswinkel ( c< ) der 5 Anlenkpunkte (19,20) ein stumpfer Winkel ist und die Anlenkpunkte (19,20) auf der Kurbel (18) in der gleichen Bewegungsebene liegen (Fig. 3).6. Device according to claim 4 or 5, characterized in that the assignment angle (c <) of the two triangle legs passing through the axis of rotation (23) of the crank (18 ') and one of the articulation points (19, 20) 5 articulation points (19.20) is an obtuse angle and the Articulation points (19, 20) on the crank (18) lie in the same plane of movement (Fig. 3).
7. Vorrichtung nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, daß die Anlenkpunkte (19,20) der Antriebsgestänge ( 21 , 22 ; 21 ' , 22 ) eines Wischerarms (11,12) als Zapfen- oder Kugelgelenke ausgebildet sind. 7. Device according to one of claims 1-6, characterized in that the articulation points (19, 20) of the drive linkage (21, 22; 21 ', 22) of a wiper arm (11, 12) are designed as pin or ball joints.
PCT/DE1995/001572 1994-12-10 1995-11-14 Windshield wiper for vehicles WO1996018528A1 (en)

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DE102015224616A1 (en) 2015-12-08 2017-06-08 Robert Bosch Gmbh Method for fastening a spherical shell in a joint rod and joint rod with ball socket
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