JP2641221B2 - Windshield wiper device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a wiper belt moving over the width of a windshield and guide drive means arranged in the area of the side edges of the windshield for guiding and driving the wiper belt. And a means for tensioning the wiper belt. The invention relates to a windshield wiper device for cleaning a windshield, in particular a windshield, such as a front windshield or a rear windshield of a motor vehicle, having a windshield wiper belt.

BACKGROUND OF THE INVENTION In windshield devices, single arm wipers as well as double windshield wipers and pantograph wipers are well known. All conventional configurations include a wiper fitting having a crank drive, a wiper arm, and a wiper blade. For aerodynamic reasons, there is always a problem with the contact force distribution or surface pressure of the wiper blades when the windshield is more and more curved, especially at high vehicle speeds. At this time, often the optimum wiper action is no longer guaranteed. This is because the wiper blade tends to lift. Since the cleaning operation is likewise hindered by acids, salts, fats, etc., an additional windshield wiper device with a spray nozzle on the engine bonnet is required. Furthermore, an optimal view condition is often not obtained because a large area remains that cannot be wiped off. The present invention provides here auxiliary means.

SUMMARY OF THE INVENTION The object of the invention is to improve the windshield wiper device as described at the outset, in such a way that a surface pressure which does not interfere with the windshield and especially when the front window is strongly bent is obtained. And to prevent the wiper from being lifted even at a high speed, and to realize a simple and proper operation configuration so as to have an optimum wiper range.

According to the present invention, this problem is solved as follows in the windshield wiper device described above. That is, the wiper belt is configured as an endless belt, and the endless belt is disposed on both sides of the windshield, and is wound around rollers that perform a reciprocating cleaning operation of the belt over the height and width of the windshield; and Rollers are guided at the same height on guide rails provided on both sides of the windshield, and at least one of said rollers is driven.

As a result of this measure of the invention, in the windshield wiper device according to the invention, the use of the crank drive with the wiper arm, the wiper fitting and the wiper blade is completely omitted, but rather, in fact, over the entire windshield or front window pane. A wiper belt that moves across the board is realized. Such a wiper belt cannot be stretched without difficulty over the width or length of the windshield, and has a relatively low air resistance, so that it can be prevented from lifting even at high speeds. An uninterrupted contact force distribution and surface pressure are guaranteed at all times, and such wiper belts are distinguished by a longer service life than conventional wiper blades. In the inoperative position, the wiper belt is not actually visible, and in the operative position, it is slightly less rigid than the wiper arm with the wiper fitting and the wiper blade. Furthermore, the wiper belt according to the invention is practically suitable for all types of motor vehicles having extremely curved windshields or windshields and operates with little noise in operation. In principle, the reversing of the reciprocating motion of the wiper belt and intermittent cleaning can be performed by switching the motor.

Another important feature according to the present invention will now be described. Within the scope of the invention, depending on the respective glazing type, a plurality of wiper belts having intersecting wiper areas on the windshield may be reciprocated,
The guide rail then extends over the width or length of the windshield. According to an advantageous configuration of the invention, the endless wiper perd circulates via two rollers separated on both sides of the windshield and, if the windshield is trapezoidal, the distance between the two rollers on both sides of the windshield. Is enlarged or reduced by rollers independently driven on both windshield sides in response to changes in the effective wiper belt length between the upper and lower wiper belt positions. Therefore, the effective wiper belt length can be adjusted to different window glass widths. Therefore, in the case of a trapezoidal windshield, 4
The endless wiper belt turned through the three rollers forms a trapezoid which is relatively wide at the upper wiper belt position and relatively narrow at the lower wiper belt position. This is because a long effective belt length is required here. According to the proposal of the present invention having its own meaning,
The wiper belt is guided on one side of the windshield via a single roller and on the other side via a double roller and from the double roller into the cleaning casing and in which the cleaning liquid is passed via a deflecting roller. And a tensioning device or a belt storage for the wiper belt are arranged in the washing casing and the deflecting rollers are driven by a rotational speed control drive motor. Otherwise, the windshield wiper device with the usual spray nozzle is thus omitted.
Due to the intermittent cleaning of the wiper belt, no oil film is formed on the windscreen. Further, automatic defrosting can be performed. Since the defrosting liquid may be used together with the cleaning liquid, the windshield wiper belt does not freeze on the windscreen.
And the windshield does not freeze. If the wiper belt is circulated slowly, it absorbs a large amount of cleaning liquid and defrost liquid, and if it circulates quickly the wiper belt absorbs only a small amount, so that these liquids can be metered by different wiper belt circulations. Furthermore, since the washing casing can be easily stored at any position in the engine compartment,
A very space-saving structure is realized. Furthermore, a storage container for the cleaning liquid and the defrosting liquid can be connected to the cleaning casing via an inlet and an outlet by a pump. Advantageously, the wiper belt is configured as a toothed belt, while the rollers are configured as pinions.
In this connection, according to the invention, the guide rails are designed as racks on both sides, and the rollers with pinion shafts are mounted on the guide rails and are guided in a closed guideway surrounding the guide rails. It recirculates on the rails and thereby causes a reciprocating movement of the wiper belt on the windshield. According to the configuration of the toothed belt, the pinion and the rack, a trouble-free feed of the wiper belt is guaranteed. Further according to the invention, it is desirable for the toothed wiper belt to have an elastic insert made of rubber, plastic or steel, and to have a brush or felt or segment coating made of rubber or plastic or the like, so that it can be cleaned. The effect is further improved. Basically, the wiper belt may be configured as an elastic or rigid cable. To compensate for the slip in such a case, the single roller has a smaller circumference than the sliding clutch or the double roller and therefore rotates somewhat faster, for example, approximately 3% more than the double roller.

The advantages obtained by the present invention are substantially as follows. Thus, windshield wiper devices for windshields, such as windowpanes and in particular front and rear windowpanes of motor vehicles, are realized, which are distinguished by a simple and compact construction, and are particularly strongly curved. Even in the case of a windshield which is used, since it is excellent in terms of high and uniformly distributed surface pressure, no lifting occurs even at a high speed. Furthermore, a wiper range of almost 100% is realized, and the mechanical construction costs are also minimized. Such a windshield wiper device is excellent not only in that it can be manufactured at a reasonable price, but also in that it has a long life. Otherwise wiper blade theft, which often occurs, is eliminated.

Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings.

The figure shows a windshield wiper device for cleaning a windshield 1 of a motor vehicle, in particular a front window glass, and together with a windshield wiper 2 reciprocating on the windshield 1 and a drive motor 3 for the windshield wiper. It is shown. The windshield wiper is configured as a wiper belt 2 that moves over the width or length of the windshield 1. The wiper belt 2 is guided and driven with a predetermined belt tension applied to the side edges of the windshield 1 or the range of the upper and lower edges.

The wiper belt 2 is configured as an endless belt and circulates around rollers 4, 5 arranged on both sides of the windshield. The rollers 4, 5 are guided at approximately the same height on guide rails 6 on either side of the windshield 1, with the guide rails 6 extending across the width or height of the windshield 1. , And the rollers are independently driven.

According to the configuration not shown, the endless wiper belt 2
Circulates around two rollers separated on each side of the windshield 1 and circulates, and in the case of a trapezoidal windshield, the distance between each two rollers on each side of the windshield is determined by the upper wiper belt position and the lower Corresponding to a change in the effective wiper belt length between the side wiper belt positions, it is enlarged or reduced by rollers driven independently on both windshield sides.

According to the illustrated embodiment, the wiper belt 2 is placed on one side of the windshield 1 via a single roller 4 and on the other side via a double roller 5 and from a double roller into the cleaning casing 7. And is guided therein through a washing and defrosting liquid 9 via deflection rollers. A tensioning device 10 or a belt storage for the wiper belt 2 is arranged in the cleaning casing 7, and one turning roller 8 is driven by a rotation speed control drive motor 3. In order to partially or completely compensate for the change in length of the wiper belt 2 over the width of the windshield 1, a tensioning device 10 or a belt storage is required. Such a change in length occurs in the case of the trapezoidal windshield 1. A storage container for the washing or defrosting liquid 9 into the washing casing 7 via inlet and outlet 11
12 and a filter are connected by a pump 13.
The wiper belt 2 is configured as a toothed belt, and the rollers 4 and 5 are configured as pinions. On the other hand, the guide rail 6 is configured as a rack. The rollers 4, 5 are wrapped around the guide rail 6 by a pinion shaft 14 and circulate in the guide rail 6 in a closed guideway 15 surrounding the guide rail, whereby the windshield 1
A reciprocating wiper motion of the upper wiper belt 2 is performed. This is shown schematically in FIG. The toothed wiper belt 2 has a resilient insert 16 made of rubber or plastic and has a brush coating 17 or a felt coating, these coatings having a strongly curved window with the required surface pressure when the wiper belt 2 is tensioned. Since it comes into contact with the shield 1 without hindrance, an optimum cleaning effect is secured. Basically, within the scope of the invention, it is possible to provide a motor for circulating the wiper belt 2 on the one hand and a motor for reciprocating the wiper belt 2 in rural areas. According to an advantageous embodiment of the invention, which has a unique meaning, on both sides of the window or windshield to be cleaned, there is provided an electronically controlled drive with a motor which rotates synchronously for the circulating or reciprocating movement of the wiper belt 2. Therefore, it is desirable that a large-sized window glass can be cleaned without any trouble.

Furthermore, within the scope of the invention, the windshield wiper device according to the invention makes it possible to clean the current body shape in whole, in areas or in parts.
This is especially the case when the windshield to be cleaned is, as it were, a continuous transition to the vehicle body, so that the wiper belt 2 extends beyond the windshield 1 and into the area of the body which follows, while maintaining sufficient belt tension. This is performed when a reciprocating wiper motion can be performed.

[Brief description of the drawings]

1 is a schematic view of a windshield wiper device according to the present invention, FIG. 2 is a plan view showing a single roller and a double roller portion of the device of FIG. 1, and FIG. 3 is a device of FIG. FIG. 4 is a cross-sectional view showing a wiper belt and a guide rail of FIG. 1 ... wind shield, 2 ... wiper belt, 3 ...
Drive motors, 4, 5, rollers, 6 guide rails,
7 ... washing casing, 8 ... turning roller, 9 ... washing liquid, 10 ... tensioning device, 11 ... outlet and inlet, 13 ... pump, 14 ... pinion shaft, 15 ... guideway, 16 ... Insert,
17 …… Coating

Claims (11)

(57) [Claims] A windshield wiper device for cleaning a windshield, in particular a windshield or a rear window glass of a motor vehicle, the wiper device moving over the width of the windshield (1). (2) a guide driving means disposed in the range of the side edge of the windshield (1) for guiding and driving the wiper belt (2); and means for applying tension to the wiper belt (2). In the windshield wiper device, the wiper belt (2) is configured as an endless belt, and the endless belt is disposed on both sides of the windshield (1), and the height of the windshield (1) and Roller (4,
5) and the rollers (4,5) are guided at the same height on guide rails (6) provided on both sides of the windshield, and the rollers (4,5) 5) A windshield wiper device wherein at least one of 5) is driven. 2. An endless wiper belt (2) comprising a window (1).
Circulating through two rollers separated on both sides of the windshield and the windshield (1) is trapezoidal, the distance between the two rollers on both sides of the windshield is between the upper wiper belt position and the lower wiper belt position. 2. The apparatus according to claim 1, wherein the windshield is enlarged or reduced by rollers independently driven on both windshield sides in response to a change in the length of the effective wiper belt. 3. The device according to claim 1, wherein the wiper belt is configured as a toothed belt and the rollers are configured as pinions. 4. The guide rail (6) is configured as a rack on both sides, and rollers (4,5) having a pinion shaft (14) are engaged with the guide rail (6), and Closed guideway (15) surrounding rail (6)
Device according to one of the claims 1 to 3, circulating in the guide rail (6). 5. The wiper belt (2) has an elastic insert (16) made of rubber, plastic or steel, and a brush contact surface (1) made of rubber or plastic.
7. Apparatus according to claim 3 or 4, wherein the apparatus is configured as a toothed belt having a felt contact surface or a segment contact surface. 6. The device according to claim 1, wherein the wiper belt is configured as an elastic cable. 7. Apparatus according to claim 1, wherein the single roller has a smaller circumference than a sliding clutch or a double roller. 8. The device according to claim 1, further comprising a motor for circulating the wiper belt and a motor for reciprocating the wiper belt. 9. An electronically controlled drive having motors which rotate synchronously for the circulating or reciprocating movement of the wiper belt (2) is provided on both sides of the windshield (1). An apparatus according to one of the preceding claims. 10. A windshield wiper device for cleaning a windshield, in particular a windshield or a rear window glass of a motor vehicle, said wiper device moving over the width of the windshield (1). (2) a guide driving means disposed in the range of the side edge of the windshield (1) for guiding and driving the wiper belt (2); and means for applying tension to the wiper belt (2). In the windshield wiper device, the wiper belt (2) is configured as an endless belt, and the endless belt is disposed on both sides of the windshield (1), and the height of the windshield (1) and Roller (4,
5) and the rollers (4,5) are guided at the same height on guide rails (6) provided on both sides of the windshield, and the rollers (4,5) 5) is driven, said wiper belt (2) being on one side of the windshield (1) via a single roller (4) and on the other side via a double roller (5), and The double roller (5) is guided into the cleaning casing (7), in which the wiper belt is guided through the at least one cleaning liquid (9) via the deflecting roller (8) and within the cleaning casing (7). A tensioning device (10) or a belt storage for the wiper belt (2) is arranged in the vehicle, and a turning roller (8) is driven by a rotational speed control drive motor (3).
A windshield wiper device driven by a windshield wiper device. 11. The cleaning container according to claim 10, wherein a storage container for the cleaning liquid (9) with a pump (13) and a filter is connected to the inlet and the outlet (11) of the cleaning casing (7). Equipment.