EP0701038A1 - Two-run cable window regulator for operating spherically curved window panes - Google Patents

Abstract

The spherical contoured window for a vehicle door is operated by two cable drives in guide rails. The guide rail corresponding to the more curved part of the window is inclined w.r.t. the drive plane. The amount of tilts is such that the sliders in both guide rails cover the same distances along the tracks but with different actual movements of the window. For steeply inclined guide rails the slider grips the glass via a sliding compensating rail. The inclined rail can be replaced by a curved rail (1A). The cable drives are linked and can each be driven by an electric servo motor.

Description

The invention relates to a double-strand cable window lifter for motor vehicles according to the preamble of claim 1. The window lifter is specially designed for guiding spherically curved window panes of a motor vehicle and, in the case of widely differing radii of curvature of the window pane at the locations of the two guide rails, ensures exact adherence to a predetermined pull-off path.

It is common to actuate spherically curved window panes in motor vehicles with arm window lifters, the window panes sliding in lateral guides of the vehicle door, which extend close to the door floor. These Lateral guides are necessary in order to be able to derive the forces occurring perpendicular to the plane of the pane. The disadvantage, however, is that the lateral guidance in the lock area often leads to space problems, especially if the door construction is particularly narrow. Therefore, if necessary, part of the side guide is designed as a separate additional part and used after the lock has been installed. Thus, an increased installation effort must be accepted.

The use of single-strand cable window lifters often appears to be less advantageous for lifting and lowering large, spherically designed window panes, because tilting of the window pane cannot usually be avoided due to the insufficiently available driver base.

Although the use of known conventional double-strand cable window lifters is suitable for safely guiding the window pane in the so-called Y direction (transverse to the plane of the pane) and for preventing the window pane from tilting, the typical parallel trigger does not meet the requirements of the different trigger lengths at the locations of the respective guide rails. Therefore, the window pane inevitably tilts out of its intended trigger path, which can also lead to jamming.

A cable window lifter is known from DE-C1 36 15 578, which represents a combination of two single-strand cable window lifters, each of the two closed cable loops being guided over a separate cable drum. A common drive wheel transmits the driving force to the two cable drums. The purpose of this construction is to avoid rope change bends and thus to improve the durability of the rope.

The invention has for its object to develop a double-strand cable window lifter for motor vehicles, which ensures an exact deduction of a spherically curved window pane on an intended trigger path using a simple and inexpensive structural design. The window regulator should have a small footprint and allow good accessibility in the lock area.

According to the invention, the object is achieved by a double-strand cable window lifter, of which at least one guide rail has means which bring about a change in the otherwise usual stroke length. If these means are to be used on the guide rail in the region of the smaller radius of curvature of the spherically curved window pane, these lead to a stroke shortening; and in the event that these means are to be used on the guide rail in the region of the larger radius of curvature, they lead to a stroke extension.

• (1) Die Führungsschiene im Bereich des kleineren Durchmessers der sphärischen Krümmung der Fensterscheibe (meistens im Bereich A-Säule des Kraftfahrzeuges) ist gegenüber der anderen Führungsschiene an der Stelle des größeren Durchmessers der Scheibenkrümmung in der Verschiebeebene der Fensterscheibe geneigt angeordnet. Dabei ist die Neigung so gewählt, daß der Gleiter beim Ablauf auf der Führungsschiene zwischen seiner oberen und seiner unteren Anschlagsposition genau den gewünschten (reduzierten) Hub ausführt. Zwischen dem Mitnehmer und dem Scheibenhalter (Scheibenbefestigung) ist ein quer zur Abzugsbahn wirkender Ausgleich notwendig, der die in Abhängigkeit von der Scheibenstellung unterschiedlichen Abstände zwischen dem Gleiter und dem Scheibenhalter kompensiert. Beispielsweise kann der Ausgleich von einer Ausgleichsschiene gewährleistet werden, die einerseits mit dem Mitnehmer (Gleiter) und andererseits mit dem Scheibenhalter in verschiebbarer Verbindung steht. Das Schiebegelenk kann dabei am Mitnehmer oder am Scheibenhalter angeordnet sein. Es ist aber auch möglich, die Ausgleichsbewegung über ein in der Fensterscheibe befindliches Langloch und ein darin eingreifendes Gleitelement des Mitnehmers zu gewährleisten.
• (2) Die Führungsschiene im Bereich des kleineren Krümmungsradiuses der sphärischen Fensterscheibe ist in der Abzugsebene quer zur Abzugsbahn derart gekrümmt, daß ein in das innere des Krümmungsradiuses weisender, mit dem Mitnehmer verbundener Ausgleichsarm die gewünschte Krümmung des Hubes im Vergleich zur anderen Führungsschiene bewirkt. Dabei steht der Ausgleichsarm mit dem Scheibenhalter über ein Dreh-Schiebegelenk in Verbindung. Zur Veränderung des Verhältnisses zwischen Verschiebestrecke des Mitnehmers und der Führungsschiene und dem tatsächlich realisierten Hub kann der Krümmunggrad der Führungsschiene und/oder die Hebelänge des Ausgleichsarms entsprechend angepaßt werden.
• (3) Die beiden Führungsschienen sind nicht wie bisher üblich auf der gleichen Seite der Fensterscheibe angeordnet. Vielmehr liegt die eine Führungsschiene im Bereich des kleineren Krümmungsradiuses der sphärischen Fensterscheibe im Außenraum zwischen Scheibe und Türaußenhaut und die andere Führungsschiene im Innenraum zwischen Fensterscheibe und der Türinnenverkleidung. Dabei ist der an die Scheibenkrümmung angepaßte Radius der außenliegenden Führungsschiene größer als der Scheibenkrümmungsradius an dieser Stelle und der Radius der innenliegenden Führungsschiene ist kleiner als der Scheibenkrümmungsradius an der entsprechenden Stelle. Eine Anpassung der Hübe der beiden Führungsschienen an die gegebenen konkreten Anforderungen eines Anwendungsfalls kann durch Veränderung des Abstandes der Fensterscheibe zur Führungsbahn der Führungsschiene erfolgen. So verringern entsprechende Hebellängen den Hub der äußeren Führungsschiene, während mit zunehmender Hublänge an der inneren Führungsschiene der Hub verringert wird.

This can be achieved, for example, by the following sub-principles:

• (1) The guide rail in the area of the smaller diameter of the spherical curvature of the window pane (usually in the A-pillar area of the motor vehicle) is inclined relative to the other guide rail at the location of the larger diameter of the window pane curvature in the plane of displacement of the window pane. The inclination is chosen so that the slider executes exactly the desired (reduced) stroke when it runs on the guide rail between its upper and lower stop positions. Between the driver and the disc holder (disc attachment) is a cross acting to the trigger path Compensation necessary, which compensates for the different distances depending on the position of the pane between the glider and the pane holder. For example, the compensation can be ensured by a compensation rail, which is on the one hand with the driver (glider) and on the other hand with the disc holder in a sliding connection. The sliding joint can be arranged on the driver or on the disc holder. However, it is also possible to ensure the compensating movement via an elongated hole in the window pane and a sliding element of the driver engaging therein.
• (2) The guide rail in the region of the smaller radius of curvature of the spherical window pane is curved in the take-off plane transversely to the take-off path in such a way that a compensating arm pointing into the inside of the radius of curvature and connected to the driver brings about the desired curvature of the stroke in comparison to the other guide rail. The compensating arm is connected to the disc holder via a rotating sliding joint. To change the relationship between the displacement distance of the driver and the guide rail and the actually realized stroke, the degree of curvature of the guide rail and / or the lever length of the compensating arm can be adjusted accordingly.
• (3) The two guide rails are not arranged on the same side of the window as usual. Rather, the one guide rail lies in the area of the smaller radius of curvature of the spherical window pane in the outer space between the pane and the outer skin of the door and the other guide rail lies in the inner space between the window pane and the door interior trim. The radius of the outer guide rail adapted to the curvature of the window is larger than the radius of curvature of the window at this point and the radius of the inner guide rail is smaller than the radius of curvature at the corresponding point. The strokes of the two guide rails can be adapted to the specific requirements of an application by changing the distance between the window pane and the guide track of the guide rail. Corresponding lever lengths reduce the stroke of the outer guide rail, while the stroke is reduced with increasing stroke length on the inner guide rail.

All the variants described have the advantage that the strict parallel parallel window take-off, which is characteristic of double-strand cable window lifters, can be adapted to the special needs of spherically curved window windows with simple means. In spite of the same length of displacement of the drivers on the two guide rails, the window pane is moved locally with a different stroke.

Another option for moving a window pane on two guide rails with different lifting characteristics is the use of two separate ropes stretched along the guide rail, each of which is assigned a separate electric motor drive, which is controlled by a common electronic control unit. Thus, in particular when using a so-called position detection of the window pane, the desired different stroke ratios can be used.

By eliminating the crossed rope loop, installation space is gained. The software of the electronic control unit mainly adapts to the different conditions of different vehicles.

Figur 1

- schematische Darstellung eines doppelsträngigen Seilfensterhebers mit geneigt angeordneter A-säulenseitiger Führungsschiene;

Figur 1a

- Ausschnitt aus Figur 1 A, am Mitnehmer geführte Ausgleichsschiene mit Scheibenhalter;

Figur 2

- schematische Darstellung eines doppelsträngigen Seilfensterhebers mit gekrümmter A-säulenseitiger Führungsschiene;

Figur 2a

- Ausschnitt aus Figur 2, Mitnehmer mit Ausgleichsarm und Scheibenhalter;

Figur 3

- schematische Darstellung eines doppelsträngigen Seilfensterhebers mit außenliegender A-säulenseitiger Führungsschiene und innenliegender B-säulenseitiger Führungsschiene;

Figur 3a

- schematische Darstellung eines Längsschnitts durch die Fahrzeugtür im Bereich der A-säulenseitiger Führungsschiene;

Figur 3b

- schematische Darstellung eines Längsschnitts durch die Fahrzeugtür im Bereich der B-säulenseitigen Führungsschiene;

Figur 3c

- schematische Darstellung eines Querschnitts durch die Fahrzeugtür;

Figur 4

- schematische Darstellung eines Seilfensterhebers mit zwei separaten Seilen und jeweils separaten motorischen Antrieben.

The invention is explained in more detail below on the basis of exemplary embodiments and the figures shown. Show it:

Figure 1

- Schematic representation of a double-strand cable window lifter with an inclined A-pillar-side guide rail;

Figure 1a

- Section from Figure 1A, compensation rail guided on the carrier with a pane holder;

Figure 2

- Schematic representation of a double-strand cable window lifter with curved A-pillar-side guide rail;

Figure 2a

- Section from Figure 2, driver with compensating arm and disc holder;

Figure 3

- Schematic representation of a double-strand cable window lifter with an external A-pillar-side guide rail and an internal B-pillar-side guide rail;

Figure 3a

- Schematic representation of a longitudinal section through the vehicle door in the area of the A-pillar-side guide rail;

Figure 3b

- Schematic representation of a longitudinal section through the vehicle door in the region of the B-pillar-side guide rail;

Figure 3c

- Schematic representation of a cross section through the vehicle door;

Figure 4

- Schematic representation of a cable window lifter with two separate cables and separate motor drives.

The invention can be used in all those applications in which the advantages of the double-strand cable window lifter are to be paired with the need for a non-parallel window trigger. Such tasks occur with such retractable window panes that have a strong but not uniform spherical curvature. When a double-strand cable window lifter is used, the guide rails of which are arranged in areas of different curvature of the pane, this results in the need to move the window pane at these points with a different stroke in each case. In particular, the large front window panes between the A and B pillars of a motor vehicle often pose corresponding requirements. In principle, however, the rear window panes, which are guided between the B and C pillars, can also be adjusted using the window lifters described.

The invention provides various solution variants of the principle of the invention. Which of the stroke-shortening technical means should preferably be used depends on the specific conditions of the individual application.

FIG. 1 schematically shows a double-strand cable window lifter, the A-pillar-side guide rail 1A (guide rail in the region of the smaller radius of curvature of the window pane) is arranged at an angle α with respect to the other B-pillar-side guide rail 1B. To clarify the structural design, both the angle of inclination α and the lever length 3A of the compensating rail 3 which is dependent thereon are shown in a greatly exaggerated manner.

The figure shows the carriers 10 A, 10 B guided on the guide rails 1 A, 1 B in their upper and lower stop positions, respectively. The same applies to the compensating rail 3 in the form of a longitudinally slotted box profile, which is guided on a suitable shaped piece of the driver 10 A in the X direction (transverse to the withdrawal direction of the window pane 7) (see also FIG. 1 a). The pane holder 4 A is listed as a clamping element, between the clamping jaws of which the window pane 7 is clamped. The screw connection 30 is used to generate the clamping force for fastening the window pane to the compensating rail. The other driver 10 B is directly connected to the pane holder 4 A.

Both guide rails 1 A, 1 B are of the same length and have at their ends deflection rollers 50, over which the rope loop 5 is guided. The drivers 10 B are firmly connected to the rope loop 5 in order to be able to absorb the adjusting force generated by a drive 6.

wobei der Hub 2B der parallel zur Abzugsrichtung der Fensterscheibe 7 verlaufenden Führungsschiene 1B genau der Verschiebelänge des Mitnehmers 10A auf der geneigten Führungsschiene 1A entspricht.When the drive is actuated, the sliders 10 A, 10 B on the guide rails 1 A, 1 B are shifted by the same distance. Due to the inclination of the guide rail 1 A by the angle α, the maximum stroke is shortened to: $$\text{<figure-callout id="2A" label="Stroke" filenames="imgf0001.png,imgf0003.png" state="{{state}}">Stroke</figure-callout> 2A = <figure-callout id="2B" label="stroke" filenames="imgf0001.png,imgf0002.png" state="{{state}}">stroke</figure-callout> 2B x cos α,}$$

wherein the stroke 2B of the guide rail 1B running parallel to the withdrawal direction of the window pane 7 corresponds exactly to the displacement length of the driver 10A on the inclined guide rail 1A.

During the raising or lowering of the window pane 7, the distance between the pane holder 4 A and the driver 10 A changes continuously. The necessary compensation takes place through the sliding joint connection between the glider 10 A and the compensation rail 3. Of course, differently designed sliding joint connections can also be used. For example, the pane holder 4 A can be displaceably mounted on the outer rail 3 or a sliding joint connection is designed with the inclusion of an elongated hole provided in the window pane 7.

FIG. 2 schematically shows a further variant of the invention of a double-strand cable window lifter using a closed cable loop 5, which is guided over cable pulleys 50 and is connected to drivers 10A 'and 10B'. While the driver 10B 'is slidably supported on the straight guide rail 1B' running parallel to the withdrawal direction and carries a disc holder 4B 'for attachment to the lower edge of the disc, the other driver 10A' is on a guide rail 1A which is curved in the withdrawal plane (in the X direction) 'arranged. It is located in the area of the smaller radius of curvature and shortens the disc stroke in comparison to the same guide rail 1B '.

FIG. 2a shows a section from FIG. 2. Accordingly, a compensating arm 3 ′ with a rectified elongated hole 310 ′ adjoins the driver 10A ′ at right angles, which is penetrated by the screw connection 30 ′ for fastening the disk holder 4A ′. With the cylindrical shaft 300 ', the elongated hole 310' forms a rotary sliding joint to compensate for the different angular positions of the driver 10A 'and the distance between the driver 10A' and the disk holder 4A 'which changes during the disk actuation.

If the window pane 7 is moved between its upper and lower stop position, both drivers 10A ', 10B' travel the same length, but the stroke 2A 'is reduced compared to the stroke 2B' of the straight guide rail 1B '. The shorter the stroke, the greater the smaller the radius of curvature R 'of the guide rail 1A', i.e. the greater the curvature of this guide rail 1 A '.

The compensating arm 3 'pointing in the direction of the center of the radius of curvature of the guide rail 1A' apparently guides the disk holder 4A 'onto an arc of a circle whose radius is smaller than the radius R' of the guide rail 1A '. The degree of stroke shortening can therefore also be influenced by varying the distance of the disk holder 4A 'from the guide rail 1A'.

On the other hand, it is also possible to use a straight guide rail on the A-pillar side and to equip a curved B-pillar-side guide rail with such a slider, the compensating arm of which points radially outward, ie away from the center of the circle of curvature. This causes an increase in stroke on this guide rail. The stroke on the A-pillar-side guide rail in the region of the smaller radius of curvature of the window pane 7 thus remains relatively smaller. The task of the invention can be solved equally well with both sub-variants.

A further embodiment variant of the invention is shown in FIGS. 3 to 3c. This is also a double-strand cable window lifter consisting of the usual components (guide rails 1A '', 1B ''; driver 10A '', 10B '' with pane holder 4A '', 4B ''; deflection rollers 50 for Guidance of the rope loop 5; Drive 6). The special feature, however, is that the A-pillar-side guide rail 1A ″ is arranged in the region of the smaller radius of curvature R _{A of} the spherical window pane 7 between the outer door skin 8 and the window pane 7, while the other, B-pillar-side guide rail 1B ″ is arranged in the region of the larger radius of curvature R _{B of} the window pane 7 is fastened between the door interior trim 9 and the window pane 7. Here, the radius of curvature R _a ″ of the A-pillar-side outer guide rails 1A ″ has a larger amount than the radius of curvature R _{A of} the window pane 7; conversely, the radius of curvature R _b '' of the B-pillar-side inner guide rail 1B '' is larger than the radius of curvature R _{B of} the window pane 7 in this area.

Between the carriers 10A ″, 10B ″ or their neutral guideway on the guide rail 1A ″, 1B ″ and the disk holders 4A ″, 4B ″ there is a length 3A ″, 3B ″ of the connecting lever 3 '' defined distance. With increasing lever length 3A ″, 3B ″, a stroke 2A ″, 2B ″ that deviates more from the displacement distance of the slider 10A ″, 10B ″ is generated. Thus, the inward-pointing lever 3 '' on the A-pillar-side outer guide rail 1A '' leads to a shorter stroke; on the other hand, the outward-pointing lever 3 '' 'on the B-pillar-side inner guide rail 1B' 'increases the stroke. The respective stroke 2A ″, 2B ″ is determined by coordinating the structural conditions of the window connection of the two guide rails 1A ″, 1B ″.

At this point it should be pointed out that the last described variant is a Bowden window lifter required so that the rope 5 can be passed under the lower edge of the window in the lowest position of the window pane 7.

The embodiment according to the schematic representation in FIG. 4 differs significantly from all the embodiment variants described so far; however, it also serves to solve the same problem, according to which the stroke on the two guide rails of a cable window lifter should not be the same size.

The adjustment system consists of two drives 6A, 6B, which are attached to the window pane 7 and carry drivers 10A ‴, 10B ‴, which are positively connected to the profile of the guide rails 1A ‴, 1B ‴. Separate cables 5A, 5B are tensioned between the ends (clamping points 500) of the guide rails 1A ‴, 1B ‴. They loop around the cable drums 60A, 60B, which can be rotated by the drive. As a result, the drive 6A, 6B connected to the window pane 7 winds upwards and downwards.

Since both drives 6A, 6B are controlled by a (not shown) common electronic control unit, different strokes or lifting speeds can be carried out on the two guide rails 1A ‴, 1B ‴. In conjunction with position detection, even complex disc sequences can be implemented.

Reference list

1A

- Guide rail (A-pillar side)

1A '

- Guide rail (A-pillar side)

1A ''

- Guide rail (A-pillar side)

1B

- Guide rail (B pillar side)

1B '

- Guide rail (B pillar side)

1B ''

- Guide rail (B pillar side)

2A

- Stroke on the guide rail (A-pillar side)

2A '

- Stroke on the guide rail (A-pillar side)

2A ''

- Stroke on the guide rail (A-pillar side)

2 B

- stroke on the guide rail (B-pillar side)

2 B'

- stroke on the guide rail (B-pillar side)

2 B''

- stroke on the guide rail (B-pillar side)

3rd

- Compensating rail

3 '

- balance arm

3 ''

- lever

3 '' '

- lever

3A

- Lever length

3A '

- Lever length

3A ''

- Lever length

3B ''

- Lever length

30th

- screw connection

30 '

- screw connection

300 '

- shaft

310 '

- Long hole

4A

- Disc holder (A-pillar side)

4A '

- Disc holder (A-pillar side)

4A ''

- Disc holder (A-pillar side)

4B

- disc holder (B-pillar side)

4B '

- disc holder (B-pillar side)

4B ''

- disc holder (B-pillar side)

5

- rope loop

5A

- rope

5B

- rope

50

- pulley

500

- clamping point

6

- drive

6A

- drive

6B

- drive

60A

- rope drum

60B

- rope drum

7

- window pane

8th

- outer skin of the door

9

- Door lining

10A

- glider

10A '

- glider

10A ''

- glider

10A '' '

- glider

10B

- carrier (glider)

10B '

- carrier (glider)

10B ''

- carrier (glider)

10B '' '

- carrier (glider)

α

- Angle

µC

- electronic control unit

R '

- radius

R _a ''

- radius

R _b ''

- radius

R _A

- radius of curvature of the window pane (A-pillar)

R _B

- radius of curvature of the window pane (B-pillar)

Claims (16)

Double-strand cable window lifter for actuating spherically curved window panes, consisting of two guide rails, the ends of which carry cable deflections, over which a closed cable loop is guided, the cable loop being firmly connected to drivers guided on the guide rails, and using a drive unit that applies the driving force the rope transmits
characterized,
that at least one guide rail has means which cause a change in the stroke length, so that the stroke traveled is either larger or smaller than the distance traveled by the driver. Cable window lifter according to claim 1, characterized in that the guide rail (1A) in the region of the smaller radius of curvature of the window pane (7) relative to the other guide rail (1B) has such an inclined position (inclination in the X direction) that the distance between the drivers ( 10A) in the uppermost or lowermost position of the displacement path on the inclined guide rail (1A) largely corresponds to the corresponding distance of the drivers (10B) on the other guide rail (1B), and that between the driver (10A) and the disk holder (4A) a compensation (3) acting transversely to the trigger path is provided. Cable window lifter according to claim 2, characterized in that the guide rail (1B) in the region of the larger radius of curvature of the window pane (7) runs parallel to the pane withdrawal path. Cable window lifter according to claim 2, characterized in that the compensation acting transversely to the draw-off path is formed by a compensation rail (3) which is connected on the one hand to the driver (10A) and on the other hand to the window holder (4A). Cable window lifter according to claim 4, characterized in that the driver (10A) is slidably connected to the compensating rail (3). Cable window lifter according to claim 4, characterized in that the pane holder (4A) is slidably connected to the compensating rail (3). Cable window lifter according to claim 2, characterized in that the compensation acting transversely to the trigger path is formed by an elongated hole in the window pane and a sliding element engaging therein, which is connected to the driver. Cable window lifter according to claim 2, characterized in that the length (3a) of the compensation acting transversely to the trigger path corresponds at least to the small side length of a parallelogram, that of the pair parallel Sides that intersect the driver (10A) in its uppermost and lowermost positions and run parallel to the trigger path, and of the other pair of parallel sides that transversely (rectangularly) in the X direction in the uppermost and lowest position in the X direction divide to the trigger track, is formed. Cable window lifter according to claim 1, characterized in that at least one guide rail (1A ') is curved in the take-off plane transversely to the take-off path (in the X-direction) and guides a driver (slider 10A'), its disc holder (4A ') for the case the arrangement of the guide rail (1A ') in the region of the smaller radius of curvature of the window pane (7) points into the interior of the circle of curvature of the guide rail (1A') and in the case of the arrangement of the guide rail in the region of the larger radius of curvature of the window pane from the circle of curvature of the guide rail also has, wherein the disc connection is designed as a rotary sliding joint. Cable window lifter according to claim 9, characterized in that the driver (10A ') has an extension (3') with an elongated hole (310 ') oriented orthogonally to the guide rail (1A'), into which a bolt connected to the window holder (4A ') (30 ') engages. Cable window lifter according to claims 9 and 10, characterized in that the elongated hole (310 ') is at least so long that when lifting and lowering the window pane (7) due to the radius of curvature (R') of the guide rail (1A ') in X- Direction regarding the on the window pane (7) stationary bolt (30 ') executed differential movement can be compensated. Cable window lifter according to Claims 9 to 11, characterized in that, in order to reduce the stroke, guide rails (1A ') with an increasingly smaller radius of curvature (R') and / or drivers (10A ', 3') with an increasingly greater distance between the guide path of the guide rail (10A ') and the disc holder (4A') is provided. Cable window lifter according to claim 1, characterized in that the guide rail (1A '') is arranged in the region of the smaller radius of curvature (R _A ) of the window pane (7) between the window pane (7) and the outer door skin (8), the radius (R _a '') of the guide rail (1A '') is larger than the radius (R _A ) of the window pane (7), and that the other guide rail (1b '') is in the region of the larger radius of curvature (R _B ) of the window pane (7) lies between the window pane (7) and the inner door trim (9), the radius (R _b '') of the guide rail (1B '') being smaller than the radius (R _B ) of the window pane there. Cable window lifter according to claim 13, characterized in that for coordinating the different stroke lengths (2A '', 2B '') of the guide rails (1A '', 1B ''), disk attachments with correspondingly adapted distances (3A '', 3B '') between the Guideway of the guide rail (1A '', 1B '') and the window pane (7) are provided, with an increasing distance (3A '') with respect the outer guide rail (1A '') reduces the stroke and increases the stroke with respect to the inner guide rail (1B ''). Cable window lifter for actuating spherically curved window panes, consisting of two guide rails and cables running parallel to them, the cables being firmly connected to drivers guided on the guide rails and using a drive unit which transmits the driving force to the cable,
characterized,
that each rope (5A, 5B) is connected to a separate electromotive drive (6A, 6B) and that these drives (6A, 6B) are controlled by a common electronic control unit (µC). Cable window lifter according to claim 25, characterized in that each of the single-strand cable window lifters is equipped with means for determining the position of the window pane.

Images