DE1480420C

DE1480420C - Windshield wiper system

Info

Publication number: DE1480420C
Application number: DE19641480420
Authority: DE
Inventors: Dieter Von 3180 Wolfsburg Brunn
Original assignee: Volkswagen AG
Current assignee: Volkswagen AG
Priority date: 1964-03-06
Filing date: 1964-03-06
Publication date: 1973-07-26

Description

sind auf Wellen 2 angeordnet, mit denen Schwenkhebel 4 bzw. 5 verbunden sind. Die Wischer sind untereinander mit verschiedenen Winkelgeschwindigkeiten durch eine Schubstange 8 bzw. ein Pendelgetriebe 9 angetrieben, die an einer abgekröpften Kurbel 7 angreifen. Dabei ist der Schwenkhebel 5 mit einem Längsschlitz 10 versehen, in dem ein von dem freien Ende des abgekröpften Kurbelarmes 11 abgebogener Zapfen 12 läuft, während ein zwischen dem Kurbelarm 11 und dem dazu versetzten einfachen Kurbelarm 6 befindlicher Zapfen 13 über die Schubstange 8 mit einen Zapfen 14 des Schwenkhebels 4 gelenkig verbunden ist. Diese Getriebeanordnung ermöglicht ein zusammenhängendes Wischbild durch Überdecken der Wischerfelder in 15. Um einen Zusammenstoß der Wischerblätter 1 in der Mitte zu verhindern, eilt das rechte Wischerblatt vor und bestreicht sein ganzes Wischerfeld, während das linke Wischerblatt in derselben Zeit nur einen Teil seines Wischerfeldes bestreicht.are arranged on shafts 2, with which pivot levers 4 and 5 are connected. The wipers are each other at different angular speeds by a push rod 8 or a pendulum gear 9 driven, which act on a crank 7 cranked. The pivot lever is 5 provided with a longitudinal slot 10 in which one of the free end of the crank arm 11 bent pin 12 runs, while a simple between the crank arm 11 and the offset thereto Crank arm 6 located pin 13 over the push rod 8 with a pin 14 of the pivot lever 4 is articulated. This gear arrangement enables a coherent Wiping pattern by covering the wiper fields in 15. To avoid a collision of the wiper blades 1 in the middle, the right wiper blade rushes forward and sweeps its entire wiper field, while the left wiper blade sweeps only part of its wiper field in the same time.

Die auf den Kurbelarmen 6 und 11 sitzenden Zapfen 12 und 13 laufen mit gleicher Winkelgeschwindigkeit um, wobei der Zapfen 13 einen kleineren Kreis 16 und der Zapfen 12 einen größeren Kreis 17 beschreiben. Die Park- und die im Überdeckungsfeld 15 befindliche Umkehrstellung des rechten Wischerblattes 1 sind durch die tangentialen Lagen des Schwenkhebels 5 zu dem Kreis 17 in den Punkten .41 und .Bl bestimmt. Dieselben Stellungen des linken Wischerblattes 1 sind durch die Lagen des Zapfens 13 auf dem Kreis 16 in den ^: Punkten A 2 und B 2 festgelegt. Legt der Zapfen 12 einen dem Winkel α 1 entsprechenden Bogenweg von A1 bis B1 zurück, hat das rechte Wischerblatt 1 seine Umkehrstellung erreicht und der Hinlauf ist beendet. Der auf dem Kreis 16 um den gleichen Winkel aus Stellung A 2 fortbewegte Zapfen 13 vermittelt dagegen dem linken Wischerblatt 1 nur eine geringe Schwenkbewegung, so daß in dieser Phase die Wischerblätter 1 nicht zusammenstoßen können. Erreicht das linke Wischerblatt 1 das Überdeckungsfeld 15, dann hat das rechte Wischerblatt 1 bereits das Feld geräumt, wie es strichpunktiert dargestellt ist.The pins 12 and 13 seated on the crank arms 6 and 11 rotate at the same angular velocity, the pin 13 describing a smaller circle 16 and the pin 12 describing a larger circle 17. The parking position and the reversal position of the right wiper blade 1 located in the overlap field 15 are determined by the tangential positions of the pivot lever 5 to the circle 17 at points .41 and .Bl. The same positions of the left wiper blade 1, through the layers of the pin 13 on the circle 16 in ^the: set points A2 and B2. If the pin 12 covers an arc from A 1 to B 1 corresponding to the angle α 1, the right wiper blade 1 has reached its reversal position and the outward run is ended. On the other hand, the pin 13 moved on the circle 16 by the same angle from position A 2 imparts only a slight pivoting movement to the left wiper blade 1, so that the wiper blades 1 cannot collide in this phase. If the left wiper blade 1 reaches the overlap field 15, then the right wiper blade 1 has already cleared the field, as shown in dash-dotted lines.

Das rechte Wischerblatt 1 bewegt sich ab Stellung B1 rückläufig, und, zwar mit erheblich geringerer Winkelgeschwindigkeit als das linke, da der wirksame Radius des Schwenkhebels 5 vergrößert wird, während der des Schwenkhebels 4 praktisch unverändert bleibt. Nachdem auch das linke Wischerblatt 1 seine Umkehrstellung erreicht hat, bewegen sich beide Wischerblätter rückläufig, wobei die Winkelgeschwindigkeit des rechten Wischerblattes 1 weiter abnimmt, da der Zapfen 12 in die durch Stellung A1 bestimmte Tangente einläuft. Erreichen die Zapfen 12 und 13 wieder die Punkte A1 und A 2, befinden sich wieder beide Wischerblätte 1 in ihren Parkstellungen, da der linke Wischerarm 3 im schnelleren Rücklauf den rechten Wischerarm 3 einholt.The right wiper blade 1 moves backwards from position B 1, and indeed at a significantly lower angular speed than the left, since the effective radius of the pivot lever 5 is increased, while that of the pivot lever 4 remains practically unchanged. After the left wiper blade 1 has also reached its reversal position, both wiper blades move backwards, the angular speed of the right wiper blade 1 further decreasing since the pin 12 runs into the tangent determined by position A 1. When the pins 12 and 13 reach points A 1 and A 2 again, both wiper blades 1 are again in their parked positions, since the left wiper arm 3 catches up with the right wiper arm 3 in a faster return.

Die Drehrichtung der Kurbel 7 ist beliebig, in der Figur zweckmäßig rechtsdrehend angenommen, da in diesem Fall das linke Wischerblatt 1 bei der Abstellung der Wischer auch noch das Überdekkungsfeld 15 für den Fahrer freiwischt.The direction of rotation of the crank 7 is arbitrary, expediently assumed clockwise in the figure, since In this case, the left wiper blade 1 also covers the area when the wiper is turned off 15 wipes clear for the driver.

Ein gewünschter Wischerwinkel wird durch die Wahl des Umlaufradius des Zapfens 12 und des Abstandes zwischen Welle 2 und Kurbel 7 bzw. durch die Übersetzung zwischen dem Umlaufradius des Zapfens 13 und dem Schwenkhebel 4 erreicht. Das Übereinstimmen der äußeren Stellungen der Wischerblätter 1 erfolgt durch das Versetzen der Zapfen 12 und 13, d. h. der Kurbelarme 6 und 11 zueinander. A desired wiper angle is achieved by choosing the radius of revolution of the pin 12 and the Distance between shaft 2 and crank 7 or by the translation between the circumferential radius of the pin 13 and the pivot lever 4 reached. The matching of the outer positions of the Wiper blades 1 is done by offsetting the pins 12 and 13, i. H. the crank arms 6 and 11 to each other.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

1 2 dend ice swells until they melt Patent claims: constantly skip. This leads to increased wear.

1. Windshield wiper system with a cranked Finally, there is a pendulum gear for the drive th crank for driving two wipers with a single wiper is known, in which a crank different speeds under one another tap within the fork slot on one side the one in which the wiper fields in the middle, fixed fork, circle and thereby the fork cover the windshield and the or the wiper connected to it to one Swivel lever of one wiper caused by a direct pendulum movement (German patent push rod with the simple crank arm script 866 309).

A combination of this pendulum bond is characterized, transmission with one of the aforementioned versions that a pin (12) of the cranked crank would indeed lead to functional improvements in the guide arm (11) directly into a longitudinal slot (10) windshield wiper system, but the drive of the Do not simplify the pivoting lever (5) of the other wiper (1).

3) engages and this wiper, as well as the 15 The invention is based on the object for

Push rod (8) the adjacent wiper, a windshield wiper system of the aforementioned

to create a drive mechanism in the outer reverse position of the Üiiterkärite genus, j

the windshield stops. which is characterized by simplicity and the wiper blades ^l

2. Windshield wiper system according to claim 1, characterized by gentle operation and at the same time! characterized by the arrangement of the 20 an aerodynamically favorable arrangement of the cranked crank (7) on the passenger side of the wiper blades. ι motor vehicle. The invention consists in that a pin of the Λ

cranked crank arm j directly in a · ^v ~ longitudinal slot of the pivot lever of the other Wi-25 exchanger is engaged and, as well as the I push rod keeps this wiper the adjacent wiper in the outer reversal position at the lower edge of the windshield.

The advantage of this drive is above all Din-!

The invention relates to a windshield wiper system 30 gene in that it is only less by application With two parts with their wiper fields in the middle it is possible to use the wiper blades even at high the wipers covering the windshield, the speed of the vehicle without the risk of lift-off | to be driven with distinction from a cranked crank. As is well known, the Ströj run borrowed speeds among each other driven mung lines of the airstream on the windbreak! are, the pivot lever of the one wiper 35 washer approximately as if it were from a central j by means of a push rod with the simple crank point that is close to the center line of the disc poorly connected. the lower edge would be distributed radially. j

In a known windshield wiper system that the wiper blades are due to the special An-type a further push rod is provided, which is based on the order and drive of the wiper arms this cranked crank arm and adapted to the flow ratio, and the compact wiper via a four-bar gear drives. Actuator uses only one push rod. The park position of the wipers is in this simplification, a reduction in the fertideren inner reversal position at the lower edge of the supply costs and assembly time reduction compared to * windshield (German utility model of the known designs and their combination *> 1 861 871) _; _Apart from the elaborate four-nation 45 achievable. In addition, it is possible to use the articulated gearbox to work the wiper under a longitudinal slot in the swivel lever in an arc-shaped manner to exert flow conditions, as the currents form and thus the pendulum movement of the wiper blades, which is different for the outward and return lines of the airflow in almost all positions, transversely towards the wiper blades these run so that lever or ;; of the associated wiper to further influence the wiper blades at the high speed of the 50.

Vehicle are at risk of being lifted off. The cranked crank on the is advantageous

Another known windshield wiper system, arranged on the passenger side of the motor vehicle. Dader the wipers also have a push rod through the dashboard in the area of the However, the driver is free to drive at constant speeds, so that there are additional driving instru- ments are, has aerodynamically arranged 55 elements can be accommodated or the wiper blades on. These show with their wiper order of a certain instrumeritsatzes large arms in the parking position at the lower edge, which can be done more quickly.

Windshield symmetrically outward and The invention is described below on the basis of one

assume an approximately vertical position when sweeping the common central wiper field shown schematically in the drawing. 60 management example explained in more detail.

Around here a collision of the wiper blades. The figure shows a windshield wiper system

To avoid this, the wipers work with phases of the invention in a diagrammatic representation shift (U.S. Patent 3,060,479). That seen the inside of the car.

but means that the parking position of the wiper The windscreen wiper system has two wipers

leaves not in the outer reverse position, d. H. on 65, which can be located from a wiper arm 3 with wiper horizontal edge of the wiper fields, sheet 1 and in the parking position on the but something about it. The wiper blades must move the lower edge of the windshield away from each other which in winter are facing outwards in the parking positions. The wiper arms 3