DE20202352U1 - Path-controlled cable window lifter for a window pane of a motor vehicle - Google Patents

Description

PATENT ATTORNEYS
EUROPEAN PATENT AND TRADEMARK ATTORNEYS

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DR. rer.nat. HORST REINHARD (-1998) DIPL-ING. UDO SKUHRA DIPL-ING. REINHARD WEISE DR. rer.nat. WERNER BEHNiSCH DR. rer.nat. STEPHAN BARTH DIPL-ING. DIPL-ING. GLYN CHARLES WOLFGANG SANDMANN, M.P.H. (DPMA) DIPL-ING. JÜRGEN METZLER*

FRIEDRICHSTR. 31 D-80801 MUNICH PO BOX 440151
D-80750 MUNICH Tel. +49-89-3816100 Fax.+49-89-3401479

*MOHRENSTR. D-96450 COBURG Tel. +49-9561-871538 Fax.+49-9561-871539

Munich

15 February 2002

Applicant: Brose Fahrzeugteile GmbH & Co. KG Ketschendorfer Str. 38 - 50 D-96450 Coburg

Track-controlled cable window lifter for a window pane of a Motor vehicle

The invention relates to a path-controlled cable window lifter for a window pane of a motor vehicle, in particular for a frameless window pane, according to the preamble of patent claim 1.

In motor vehicles with window panes moved by cable window lifters, the window pane must be easily adjustable along a guide track or the like using drivers and the components used in the cable window lifter

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should have a compact design and a long service life.

The invention is based on the object of creating a path-controlled cable window lifter in which the driver is of compact design, can be used as an identical embodiment on both sides of the vehicle and has a path that takes up as small an area as possible.

This object is achieved according to the invention by the features of patent claim 1.

The subclaims contain advantageous further developments and improvements of the cable window lifter specified in claim 1.

In a preferred embodiment, the common axis on which the exit openings for the cable strands are located corresponds to the axis of the adjustment direction (Z axis). By arranging the exit openings for the cable strands on the common axis, the driver behaves the same on both sides of the vehicle when the angle of the guide track changes, and incorrect installation with respect to a preferred installation side is ruled out.

The driver is preferably designed in one piece. Each rope strand is guided through the base body during assembly, whereby the two or at least one nipple is then, for example, crimped onto the associated rope strand end. After the nipple or nipples have been formed onto the corresponding end of the rope strand, the nipple or nipples are clamped in the associated nipple chamber. Ss is created

a one-piece driver where no noise is possible between a cover and the base body.

According to a further embodiment, the base body has material recesses in the side wall areas adjacent to the outlet openings. These material recesses reduce the weight of the driver and ensure a compact design thereof.

According to a further embodiment, the material recesses have a curved, preferably S-shaped course, which runs essentially parallel to the path of the cable strand in the region of the outlet opening.

The outlet openings are preferably funnel-shaped. This makes it easier to insert the rope strands into the guide channels of the base body.

A preferred embodiment of the invention is shown in the drawings and is explained in more detail in the following description. In the figures:

Fig. 1 is a cross-sectional view of a driver according to an embodiment of the present invention;

Fig. 2 is a perspective view of the driver according to Fig. 1;

Fig. 3 is a cross-sectional view of a driver according to the prior art; and

Fig. 4 is a schematic diagram to explain a path-controlled cable window lifter.

In the figures, identical components of the driver are provided with identical reference symbols.

Figures 1 and 2 show a driver 1 according to an embodiment of the present invention, wherein Fig. 2 shows a perspective view of the driver according to Fig. 1, in which the driver is rotated with respect to the longitudinal axis of the driver.

The driver 1 consists of a base body 2 in which two preferably cylindrical nipple chambers 3, 4 are provided, which are approximately diametrically opposed to one another in relation to the fastening axis Y running perpendicular to the plane of the drawing in Fig. 1. This means that the nipple chambers 3, and thus the relevant cable suspensions, are provided in opposite directions to one another and the cable strands 7a, 7b emerge from the driver on opposite sides of the latter, as can be clearly seen from the drawings.

The nipple chambers 3, 4 are each connected via a guide channel 15, 16 to an outlet opening 10, 11 on the opposite end of the driver 1. The nipple chambers 3, 4 serve to accommodate nipples 5, for example, which are crimped onto the ends of a cable strand 7a, 7b. Furthermore, spring elements 13, 14, for example coil springs, are arranged in the nipple chambers 3, 4. The spring elements 13, 14 are each operatively connected to the associated nipple 5 or 6 via projections 5\ 6 ^Λ on a head end of the nipples 5, 6 for cable strand length compensation.

The base body 2 is designed to be axially symmetrical with respect to the fastening axis Y. In comparison to the design of the base body according to the prior art according to Fig. 3, the base body 2 in the present embodiment has an approximately S-shaped course, with a material recess being provided in comparison to an imaginary straight or extended side wall. The material recesses or indentations are arranged in the side wall areas 8', 9' adjacent to the outlet openings 10, 11 provided in the head-side end faces 2a, 2b and preferably have a curved course that is adapted to the course of the cable strands 7a, 7b within the driver.

As Fig. 1 shows, the side walls 8, 9 initially run in a straight line from one end face 2a, 2b to the middle of the driver 1 and have an oblique or preferably approximately S-shaped course from approximately the middle to the opposite other end face (Fig. 1). Starting from the center line m of the driver 1, the side walls 8, 9 initially advantageously have a section 8a, 9a that runs curved in the direction of the funnel-shaped driver opening 10 or 11, with the centers of the radii of curvature lying on the fastening axis of the driver (Y-axis). These sections 8a, 9a are each followed by a section 8b, 9b that is curved in the opposite direction, i.e. runs away from the driver opening 10, 11 and has approximately the same radius of curvature as section 8a or 9a. This results in an axial symmetry of the driver 1 with respect to the Y axis.

Due to the described side wall profile of the driver 1, the driver 1 has a more compact and lighter design compared to a rectangular shape.

The base body 2 also has, as shown in Fig. 1, a guide channel 15, 16 for each inserted cable strand end, which runs diagonally or in an S-shape between the respective nipple chamber 3, 4 and the associated outlet opening 10, 11. The positively inserted cable strand area is inserted in the associated guide channel 15, 16 and can only be slid when the spring is compressed due to an adjustment with cable length compensation.

To help insert the corresponding cable strand end, the outlet openings 10, 11 are preferably funnel-shaped. The course of each cable strand 7a, 7b inside the driver 1 essentially corresponds to the course of the facing side walls ^8λ , ^9λ , which results in a high level of compactness of the base body. The outlet openings 10 and 11 are arranged on a common axis according to Fig. 1, which essentially corresponds to the axis of the adjustment direction (Z axis). Thus, when the angle of the guide track changes, the driver 1 is not exposed to any torque that results from the design of the driver itself, since the cable outlets are on the same axis, which means that the driver experiences the same deflection on both sides of the vehicle.

The driver 1 has, preferably in the middle, a through opening 17 along a fastening axis (Y-axis), into which, for example, a bolt for guiding the driver along the guide track of a base plate can be inserted.

The driver 1 is preferably designed in one piece, wherein the free end of the rope strand is guided through the preferably funnel-shaped outlet opening 10 or 11 through the associated guide channel 15 or 16 during the assembly process.

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is shot through. The nipple is then, for example, squeezed onto the associated rope strand end. Finally, the nipple 5 or 6 is clamped in the associated nipple chamber 3 or 4 in such a way that the rope strand length can be compensated for using the associated spring elements 13 or 14.

Such a one-piece design prevents any noise development between a cover and a base body due to fitting tolerances. In addition, abrasion of the corresponding components subject to tolerances is prevented and loss-proof pre-assembly is ensured.

The symmetrical design of the driver 1 with respect to the axis of the adjustment direction (Z-axis) prevents incorrect assembly with respect to a corresponding side of the vehicle.

Fig. 3 shows a known driver 1 of a cable window lifter with a base body 2 in which two nipple chambers 3, 4 are provided for the positive reception of nipples 5, 6, which are each attached as holding devices to the ends of a cable strand 7a, 7b. The nipple chambers 3, 4 are arranged approximately diametrically to a fastening axis Y of the base body 2, wherein the base body 2 has outlet openings 10, 11 on its end faces 2a, 2b, which are opposite one another, for an outlet of the respective cable strands 7a, 7b.

Spring elements 13, 14, nipples 5, 6 and each rope strand 7a, 7b are inserted from above into the base body 2, which is covered with a separate cover (not shown). Due to manufacturing tolerances and/or external influences,

such as weather conditions, force effects, etc., this prior art has the disadvantage that the cover can detach from the base body 2, causing noise between the base body and the cover. Furthermore, the detachment of the cover can cause abrasion of the coating of a base plate or increased wear of the driver and increase the overall play of the system.

In addition, if the outlet openings 10, 11 are arranged on different axes as shown in Fig. 3, the base body 2 can be deflected differently on both sides of the vehicle when the angle of the guide track of the drivers changes. A collision test of the driver movement on both sides of the vehicle is therefore necessary.

Fig. 4 shows a schematic representation of a path-controlled cable window lifter to explain its structure, wherein a driver 1 according to the prior art is shown in Fig. 4. According to the invention, the known driver designated 1 in Fig. 4 is replaced by the driver according to the invention.

As can be seen from Fig. 4, the driver 1 is attached to a driver plate 20. The driver plate 20 carries a window pane indicated by 22, which is adjusted according to the movement of the driver plate 20. In the embodiment shown, the driver plate 20 is guided by two bolts 23, 24 in associated tracks 25, 26, so that when the driver 1 moves, the driver plate 20 follows the course of the tracks 25, 26. In the embodiment shown, the driver 1 is guided by a further bolt 28 in a further track 29, so that when an adjustment

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of the driver 1 as a result of a movement of the cable 7, the driver is guided along the track 29 and adjusted together with the driver plate 20. In this way, a controlled movement of the window pane 22 is achieved.

In the embodiment shown, a total of three guide tracks are provided in order to achieve a controlled movement of the driver plate 20. The tracks 25, 26 and 29 are provided on a base plate 30, which contains corresponding deflections for the cable 7, which are not further designated and described.

Although the present invention has been described above using a preferred embodiment, it is not limited thereto but can be modified in many ways.

Claims (6)

1. Path-controlled cable window lifter for a window pane of a motor vehicle, in particular for a frameless window pane with a base plate having guide tracks and with a driver ( 1 ) guided along the guide track, consisting of a base body ( 2 ) with two nipple chambers ( 3 , 4 ) for the positive reception of nipples ( 5 , 6 ) or the like, which are attached as a holding device to the ends of a cable strand ( 7 ), wherein the nipple chambers ( 3 , 4 ) are arranged opposite one another in the base body ( 2 ) and the base body ( 2 ) has outlet openings for the cable strands ( 7a , 7b ) that are opposite one another, characterized in that at least the outlet openings ( 10 , 11 ) for the cable strands ( 7a , 7b ) are arranged on a common axis (Z axis). 2. Cable window lifter according to claim 1, characterized in that the common axis on which the outlet openings ( 10 , 11 ) for the cable strands (Ja, 7b) are located corresponds to the axis of the adjustment direction (Z-axis). 3. Cable window lifter according to claim 1 or 2, characterized in that the driver ( 1 ) is formed in one piece. 4. Cable window lifter according to at least one of the preceding claims, characterized in that the course of the side walls of the base body ( 2 ) at the side wall regions ( 8 ', 9 ') adjacent to the outlet openings ( 1C , 11 ) is adapted to the course of the cable strands ( 7a , 7b ) within the driver. 5. Cable window lifter according to claim 4, characterized in that the side walls ( 8 , 9 ) have at least in some regions a curved, approximately preferably S-shaped course. 6. Cable window lifter according to at least one of the preceding claims, characterized in that the outlet openings ( 10 , 11 ) are funnel-shaped to aid assembly.