MXPA99007710A - Cable-actuated window lifter - Google Patents

Abstract

The invention relates to a cable deflection pulley (10) pertaining to a window lifter comprising a drive unit (1), a guide rail (5) for a driver (6) which is connected to the window (7) and to the cable (4), and cable deflection pulleys (8, 9) with a guide or bearing groove (12) for the cable (4). The inventive device has an axially directed assembly groove (14) in the proximity of the bearing groove (12) to facilitate and accelerate assembly and to reduce the amount of cable required. Said assembly groove contains an area (16) adjacent to the axis (15) of the cable deflection pulley (10), and an area (17) adjacent to the bearing groove (12), through which the cable is pulled from the assembly groove (14) into the bearing groove (12).

Description

CABLE WINDOW ELEVATOR Description The invention relates to a cable window lifter according to the preamble of claim 1.

Single or multi-string window lift cables are particularly known for motor vehicles, which comprise a manual or motorized drive unit and an impeller drum, a guide rail or several guide rails for one or more impellers , which are connected to a window pane of glass, and a cable wound around the impeller drum, and several cable deflection pulleys. The cable deflection pulleys have a guide or bearing groove in which the cable is guided and deflected.

Figure 1 shows as an example a single-rope window lift cable for raising and lowering a window pane sheet 7 which is placed on an impeller 6. The impeller 6 is connected to a cable 4 and is movably mounted on a lane 5 of guide. The cable 4 is wound around a drum 3 of the cable of a pulse unit 1 which in the illustrated embodiment has an electric motor 2 as the driving element. The deflection pulleys 8,9 of cable are mounted on the ends of the guide rail 5 and deflect the cable 4, which is guided in the area of the guide rail 5 parallel to the guide rail 5, towards the drum 3 of the cable where the cable 4 is wound one or more times around the drum 3 of the cable and connected thereto. Through the rotation of the drum 3 of the cable in one or the other rotational direction the impeller 6 is raised or lowered together with the window glass sheet 7 in the guide rail 5.

Figure 2 shows in an enlarged individual representation the cable deflection pulley 8 which is mounted on the upper end of the guide rail 5 according to figure 1. The cable deflection pulley 8 has an axial bore 80 which is pushed to an axis that is provided with the guide rail 5 or with a fastener connected to the guide rail 5. Several ribs 81 connect the wall of the axial bore 80 to the wall of a guide or bearing groove 82 in which the cable 4 is guided and deflected.

The cable 4 which is connected in friction relation to the drum 3 of the cable, or to its ends through positive locking elements, has in its relaxed state of the cable window elevator a loose cable which can lead to undefined states of motion of the impeller 6 and thus of the window glass sheet 7 as well as considerable noise and material fatigue accelerated to system failure. To remove the slack in the cable, the cable is stretched and pushed in this stretched state, ie with a corresponding cable length or through the arrangement of spring elements, towards the cable deflection pulleys 8, 9 in accordance with Figure 1 To facilitate the insertion of the cable 4 into the guide grooves of the cable deflection pulleys 8, 9 according to Figure 1 it is known to provide at least one of the cable deflection pulleys with a notch 83 in accordance with figure 2 in which the cable 4 is inserted and inserted into the guide groove 82 through the rotation followed by the cable guide pulley 8.

Through the sharp angulation of the cable 4 during insertion into the notch 83 however there is the danger of damage to the cable through which it is spliced or bent. Since this area of the cable is then always moved in the deflection area of the cable deflection pulley there is also the risk that the initially damaged cable will tear in this area.

In addition there is the disadvantage that the cable is adjusted in a non-ergonomic succession of movements by rolling the stump with a simultaneously high amount of force which leads to premature fatigue and damage to the fitter stump.

Furthermore, this method of assembling the cable is linked to a time-consuming assembly because first the notch 83 has to be brought into a favorable position for mounting and then the cable has to be inserted into the guide slot while Applies a large amount of force.

The object of the invention is to provide a cable deflection pulley of the aforementioned type which guarantees the soft insertion of the cable into the guide groove of the cable deflection pulley without damaging the material, which allows an ergonomic succession of movements with effort minimum and that reduces the assembly time. This is achieved according to the invention through the features of claim 1.

The solution according to the invention avoids a right-angled twisting of the cable during insertion into the guide or the bearing groove of a cable deflection pulley through the continuous dragging of the cable in an unstretched or slightly stretched state of the cable in the stretched state as well as an ergonomic succession of movements with minimal effort and a short assembly time.

By having a transition area between the bearing groove and the area of the mounting groove that joins the bearing groove, it is possible to guarantee a resistance-free transition of the cable from the mounting slot in the bearing groove.

As a result of the continuous inclination of the lateral ribs of the mounting groove in the transition area in the direction of the guide groove as well as through a gap in the rib mounted between the mounting groove and the bearing groove the Switching the cable from the mounting groove to the bearing groove is additionally made easier.

Preferably the mounting groove has the contour of a triangle with convex sides (the projection of a spherical triangle towards a plane) whose corners are advantageously rounded. Through this form of the mounting slot the cable that is inserted into the mounting slot pulls the cable deflection pulley when pulling the cable by a short portion until the cable passes through to a corner point of the contour triangle triangular shape of the mounting groove, where the cable is slightly twisted and as a result of increased friction is dragged into the small corner section and inserted above the transition area in the bearing groove.

In a preferred embodiment the mounting groove has a substantially equilateral triangular shaped contour with rounded corners where the base is near the axis of the cable deflection pulley and the opposite tip of the triangle opens in the transition area or in the bearing groove.

Through the provision of additional securing areas for the cable in the mounting slot the friction coupling of the cable with the cable deflection sheave is increased during assembly and thus the insertion of the cable into the bearing groove becomes more easy.

Further advantageous designs of the solution according to the invention are clear from the features of claims 8 to 11.

The fundamental idea of the invention will now be explained in more detail with reference to the embodiment shown in the drawings wherein: Figure 1 is a schematic view of the individual parts of the single rope cable window lifter; Figure 2 shows an enlarged view of a cable deflection pulley according to the prior art; Figure 3 shows a view of the plane of a cable deflection pulley according to the invention with mounting and guiding grooves; Figure 4 shows a view of the deflection pulley according to Figure 3 in the arrow direction IV; Figure 5 shows a sectioned view through the cable deflection pulley according to Figure 3 along the line V-V and Figure 6 shows a schematic perspective view of a cable deflection pulley formed according to the invention.

The cable deflection pulley 10 shown in view of the plane in figure 3, in an end side view in figure 4, in a cross section in figure 5 and in perspective in figure 6 has a cylindrical basic member 11 having an axial shaft or bore 15 and a peripheral bearing groove 12 formed in the wall of the cylinder. The roller 12 serves to hold the cable in the deflection area and is defined by lateral ribs 21 and 22. A mounting body 13 is mounted on one side of the basic cylindrical member 11 and has the contour of an equilateral triangle convex, that is to say with sides curved outwards, as well as rounded corners. A mounting groove 14 is provided on the periphery of the mounting body 13 and is defined on the side by ribs 20, 21 according to Figure 4.

The base 16 of the equilateral triangle is located near the axis 15 while the opposite rounded tip 17 of the equilateral triangle of the mounting body 13 is aligned with the outer contour of the basic member 11 so that the mounting groove 14 opens in an area 23 of transition in bearing groove 12.

The outer rib 20 defining the mounting groove 14 is inclined in the transition area 23 in an area 200 towards the bearing groove 11 as the rib 21 which separates the mounting groove 14 from the bearing groove 12 in an area 210 which is broken in the transition area 23.

Adapting a cable and inserting the cable into the bearing groove 12 the cable is placed in the mounting groove 14 in the base area 16 of the equilateral triangle of the mounting body 13 where the turn of the cable is shortened as a result of its proximity to the 15. By pulling the cable in one or the other direction or by rotating the drive unit of the cable window lifter the cable drives the cable deflection pulley 10 and is slightly twisted at the corner points of the equilateral triangle so that the friction connection between the cable and mounting groove 14 is increased as a result of the small surface section and the cable is placed over one of the two arms of the equilateral triangle and is dragged into the transition area 23 in the bearing groove 12 . Because in the assembled state of the cable the bearing grooves of the cable deflection pulleys lie in one plane, the cable vibrates in this position without falling back into the mounting slots.

Through a corresponding formation of the bearing groove 14 or by applying toothed gripping areas the friction connection between the cable and mounting groove 14 can be increased during the adjustment of the cable and thus the insertion of the cable into the bearing groove 12 It makes it easier .

It is within the scope of the present invention for the cable to pass through the rotation of the cable deflection pulley 10 from the mounting slot 14 to the bearing slot 12 where the end sides of the deflection pulley of The cables are provided, for example, with inlets 19 mounted between the ribs 18 and in which a correspondingly formed tool engages with an encoded connection and which is turned over by a lever system connection to roll the cable deflection pulley in the desired direction for Insert the cable into the bearing slot 12.

However, for an easier adjustment, a tensioning force is preferably exerted on the cable so that it is brought from the mounting groove 14 above the transition area 23 in the bearing groove 12. To make the adjustment even easier, the adjustment body 13 is mounted on either side of the basic member 11 so that no corresponding lateral orientation of the cable deflection pulley is required during adjustment.

With a corresponding design of the wire and cable window lifter geometry it may be sufficient if one of the various cable deflection pulleys is formed in accordance with the invention although the other rope deflection pulleys have no mounting aid. However, all the cable deflection pulleys are preferably adjusted with the aid of the assembly according to the invention to shorten the assembly time and make it easier overall.

Claims (11)

1. Cable window lifter with a drive unit, a guide rail for an impeller connected to the window pane and the cable, and cable deflection pulleys with a guide or bearing groove for the cable, characterized in that at least one cable deflection pulley is provided with a mounting groove mounted in the axial direction to the side of a bearing groove wherein the mounting groove has an area joining the axis of the cable deflection pulley and an area (17) that joins the groove of coj inete.

2. Cable window lifter according to claim 1, characterized in that a transition area is provided between the bearing groove and the area of the mounting groove that joins the bearing groove.

3. Cable window lifter according to claim 2, characterized in that in the transition area lateral ribs of the mounting groove are inclined towards the bearing groove and the rib between the mounting groove and the bearing groove. It is interrupted.

4. Cable window lifter according to at least one of the preceding claims, characterized in that the mounting slot has the contour of a triangle with convex sides.

5. Cable window lifter according to claim 4, characterized in that the corners of the triangle are rounded.

6. Cable window lifter according to claim 4 or 5, characterized in that the contour of the mounting groove consists of an equilateral triangle whose base forms the area joining the axis of the cable deflection pulley and its corner, which is between the arms of the triangle, forms the area that joins the bearing groove.

7. Cable window lifter according to at least one of the preceding claims, characterized in that at least one clamping area is provided in the mounting groove for the cable.

8. Cable window lifter according to at least one of the preceding claims, characterized in that on at least one side of the cable deflection pulley there is a coupling indentation for a positive clamping connection with a mounting tool. .

9. Cable window lifter according to claim 8, characterized in that the coupling indentation is formed by several rib-type spokes which are placed between the axis and the periphery of the cable deflection pulley.

10. Cable window lifter according to at least one of the preceding claims, characterized in that the mounting groove is mounted on either side of the cable deflection pulley.

11. Cable window lifter according to at least one of the preceding claims, characterized in that all cable deflection pulleys of the cable window lifter are provided with a mounting groove.