DE20305075U1 - Cable lifter for motor vehicle windows has closed cable run with damper spring between pane carrier and cable fixing - Google Patents

Abstract

The double run cable lifter for a motor vehicle window has a closed cable run controlled by an actuator at the end of a guide rail for the window pane. Between each of the window pane connectors (8) and each cable fastening (9) for the pane carrier (51,52) is an electrically actuated elastically deformable insert (10). The insert can be a spring between the pane carrier flange (12) and the respective cable fastening.

Description

The invention relates to a Rope window lifter for Motor vehicles according to the preamble of claim 1.

From the DE 39 25 864 C2 a double-strand cable window lifter for motor vehicles is known which contains a cable which is moved by a self-locking drive device and which is guided over deflection devices and forms a closed loop in the form of a lying figure eight. On each of the two approximately vertical sections of the rope, a slider or disc driver is attached, which is slidably received in a guide rail and to which the window pane to be raised and lowered by the cable window lifter is connected.

To limit the disk movement after A stop is attached to one of the two disc drivers at the top. A stop is also provided on the other disk driver, which however over a spring element with the cable attachment of the disc driver connected is. By appropriate alignment of the disc drivers or the window pane attached to the window carrier when closing the Window pane the stop connected to the spring element effective as the first stop.

This embodiment of a cable window lifter is supposed to prevent that if the one with the stop Disc driver its end position defined by the stop has reached while this is not yet the case with the other disc driver, which Window pane takes a tilted position and on the side, those with the disc driver not in the end position is connected, no complete installation of the window pane is achieved in the area of the upper seal. A complete closing of the Window pane by applying larger closing forces would underneath Exploiting the elasticity of the Cable window lifter system that is not yet at the stop Disc driver in the closed position move, because of the resilient cable window lifter would Disc drivers but when the additional force is released to return to its original position. By the arrangement a spring element on the disc driver, the first to the system at the stop is sufficient by compressing the spring cable length for the still required adjustment path provided if the other Driver not yet the closed position has reached.

The well-known cable window lifter system has the disadvantages, however, that the window pane or Disk drivers must be positioned so that the disc driver provided with the spring element in the closed position the window pane strikes. Readjusting of the window pane may be necessary Alignment required to ensure that the one with the spring element provided disc driver first reaches the closed position. Since the available from the spring element posed way to compensate for the closed positions of the front and rear disc driver with a steady increase in force is, the forces occurring in the known cable window lifter system are very high high and uneven on the front and rear disc drivers distributed, so that due to the different clamping forces too different strengths act on the respective sealing areas and the washer drivers.

Another problem is that the well-known double-stranded Cable windows when used in a relatively stiff door construction is able to pinch a hard object or body part the for the detection process of an anti-trap device necessary inner adjustment path "still to provide, however, the pinching force increases until reversing the window pane still significantly. Because of the spring element to disposal posed path is connected with a steady increase in strength, the path but is covered with decreasing speed, it comes up with the known cable window lifter system for a relative increase in Pinching time, which in turn increases the risk of the degree of injury increased in case of jamming.

The present invention lies based on the task, a cable window lifter for motor vehicles of the type mentioned at the outset, which is a balanced one Tension and equal clamping forces throughout Window lifter system ensures an even closing of the window pane independently of their alignment and without readjustments over the life of the window regulator ensures that only low quality and tolerance requirements the components used and when using a Bowden window regulator system to the Bowden vote and that is a reliable detection of pinching processes allows.

This object is achieved by the Features of claim 1 solved.

The arrangement of elastically deformable elements between the window pane connections and the cable fastenings of all window drivers ensures a balanced tension in the entire window lifter system with the same closing forces and thus the same load on the components used, and ensures a uniform closing of the window pane regardless of its orientation with only rough parallel adjustment without Readjustment is necessary over the lifespan of the cable window lifter. Furthermore, the cable window lifter according to the invention places only low quality and tolerance requirements on the used components and when using a Bowden window lifter to the Bowden adjustment and enables a reliable detection of pinching processes and corresponding response of a pinch protection device.

The solution according to the invention also makes one clear lower settlement behavior, i.e. less pulling due to the system-related elasticity when retracting the window regulator in the block state. When using the cable window lifter system according to the invention in a convertible there is also no adjustment of the window pane orientation required when changing from a folding top to a hardtop.

This is preferably elastic deformable element made of a spring, which is between a disk drive bracket and in the direction of movement of the disk driver on a guide element Slidable rope attachment is arranged, the spring in particular is biased.

In an advantageous embodiment of the solution according to the invention the springs of the at least two disk drivers are essentially the same Spring stiffness.

The spring stiffness and preload the spring is particularly on the behavior of a motor drive device and / or the frictional forces of the cable window lifter.

Based on an embodiment shown in the drawing the idea underlying the invention will be explained in more detail. Show it:

1 - A schematic representation of a cable window lifter with a window pane first striking the front part of a window frame;

2 - A schematic representation of a cable window lifter with a window pane striking first in the rear part of the window frame;

3 - An enlarged schematic representation of a disc driver with a preloaded spring between the disc connection and cable attachment and

4 - A schematic perspective view of an embodiment of the disc driver according to 3 ,

The in 1 The double-strand cable window lifter shown is used to raise and lower a window pane 6 which, when fully closed, one by a window frame 15 closes formed window pane opening and releases the window pane opening in the fully lowered state. The window glass 6 is on two disc drivers 51 . 52 connected, ie with appropriate mounting of the disc driver 51 . 52 connected, each with a front and rear guide rail 31 . 32 are positively connected and in the longitudinal direction on the guide rails 31 . 32 for raising and lowering the window pane 6 glide along.

The disc driver 51 . 52 are positively connected to the rope 2 or with a rope attachment 9 , the rope 2 via upper and lower deflection devices 41 . 42 . 43 . 44 at the ends of the guide rails 31 . 32 is guided and forms a closed loop in the form of a lying figure eight. For raising and lowering the window pane 6 is the rope 2 by means of a drive 1 movable in one direction or the other, so that the disc driver 51 . 52 can be raised or lowered at the same time. The disc driver points in accordance 4 a basic body 7 on that with a spherical disc connection 8th is provided and via an opening 13 the guide rail 31 respectively. 32 engages positively or on the guide rail 31 respectively. 32 is led.

Has the window pane one in 1 schematically shown parallelism offset to the window frame 15 the window pane hits 6 initially at the front, ie in the area of the guide rail assigned to the A-pillar 31 on the window frame 15 so that an opening gap that widens towards the B-pillar and a gap between the window pane that widens downward from the upper window pane edge 6 and the window frame 15 forms.

To make sure that between the window pane 6 and the window frame 15 remaining gaps can be closed without having to retighten the cable window lifter system when the window pane is retracted 6 in the block state, the disc drivers 51 . 52 according to the schematic representation according to 3 and the schematic perspective representation according to 4 one between a washer connection 8th and a rope attachment in the form of a nipple chamber or rope attachment 9 arranged, preloaded spring 10 on. The feather 10 is about a sliding pin 11 placed on which the nipple chamber or rope attachment 9 is linearly displaceable and thus between an upper disc drive tab 12 and the nipple chamber or rope attachment 9 arranged spring 10 compressed.

The nipple chamber or rope attachment 9 can the feather 10 compress only by excess forces in the upper block state of the cable window lifter or in the event of a pinch. The spring stiffness and preload of the spring 10 is matched to the electronics of a drive motor of an electric motor-operated cable window lifter and to the frictional forces prevailing in the cable window lifter system.

The spring is thus dimensioned so that it is only compressed when a rope force is greater than that for lifting the window pane 6 required rope strength.

Beats the window pane 6 according to the schematic representation according to 1 when lifting first in the front area on the fens terrahmen 15 on, so the window pane stay 6 and thus both disc drivers 51 . 52 stand. Is about the drive device 1 still pulling on the rope 2 is exercised, so in the front disc driver 51 arranged spring 10 through the cable attachment or nipple chamber 9 compressed while doing the rope 2 moved on until the rear edge of the window pane 6 at the back of the window frame 15 strikes, and as a result of the rope force occurring in the system, that in the rear disc driver 52 arranged spring 10 through the rope attachment 9 of the rear disc driver 52 is excited.

Because the feathers 10 in both disc drivers 51 . 52 have the same spring constant, occur when retracting the two disc drivers 51 . 52 the same closing forces everywhere in the block state. As a result, the tension in the cable window lifter system is balanced, ie at the upper edge of the window pane 6 Closing forces are evenly distributed.

2 also shows a schematic view of a cable window lifter, in which the window pane 6 in relation to the window frame 15 has a parallelism offset, so that the window pane 6 first to the rear area, ie the area adjacent to the B-pillar of the vehicle, to the window frame 15 strikes so that the window pane 6 and thus the disc drivers 51 . 52 stop. Is about the drive device 1 still pulling on the rope 2 is exercised, so in the rear disc driver 52 arranged spring 10 through the cable attachment or nipple chamber 9 compressed while doing the rope 2 keep moving until the front edge of the window pane 6 at the front of the window frame 15 strikes and due to the rope force occurring in the system that in the front disc driver 51 arranged spring 10 through the rope attachment 9 of the front disc driver 51 is excited.

Because the feathers 10 in both disc drivers 51 . 52 have the same spring constant, occur when retracting the two disc drivers 51 . 52 in the block state, therefore, the same closing forces everywhere in this constellation. This balances the tension in the cable window lifter system.

The schematic representations in the 1 and 2 show that the window pane 6 regardless of their original orientation in relation to the window frame 15 , ie regardless of the positioning of the disc drivers 51 . 52 , is closed evenly. For this reason, it is only necessary to use the window pane 6 align roughly so that a parallelism offset between the window pane 6 and the window frame 15 due to the inventive design of the disc driver 51 . 52 is balanced.

Because of the possible compensation for a parallelism offset without additional Strain on the cable window lifter system play a and manufacturing tolerances play a much smaller role than in known ones Window lifter systems, so that with lower demands on the dimensional stability of the components used and when adjusting the cable window lifter the manufacturing and manufacturing costs are significantly reduced.

1

drive

2

rope

6

windowpane

7

body

8th

disk access

9

nipple chamber or rope attachment

10

feather

11

slide bolt

12

Scheibenmitnehmerlasche

13

opening

15

window frame

31 32

guide rails

41 42, 43, 44

deflecting

51 52

Scheibenmitnehmer

Claims (6)

Double-strand cable window lifter for motor vehicles with a cable moved by a drive device, which forms a closed cable loop and is guided over deflection devices which are arranged at the ends of guide rails on which disc drivers connected to the cable are slidably mounted, on which one between an opening and shooting position adjustable window pane is connected, characterized in that between each of the two window pane connections ( 8th ) and each rope attachment ( 9 ) the disc driver ( 51 . 52 ) an elastically deformable element ( 10 ) is arranged. Cable window lifter according to claim 1, characterized in that the elastically deformable element from a spring ( 10 ), which is between a disc drive plate ( 12 ) and in the direction of movement of the disc driver ( 51 . 52 ) on a guide element ( 11 ) movable rope attachment ( 9 ) is arranged. Cable window lifter according to claim 2, characterized in that the spring ( 10 ) is biased. Cable window lifter according to at least one of the preceding claims, characterized in that the springs ( 10 ) the at least two disc drivers ( 51 . 52 ) have an essentially identical spring stiffness. Cable window lifter according to at least one of the preceding claims, characterized in that the spring stiffness and preload of the spring ( 10 ) on the behavior of a motor drive device ( 1 ) is coordinated. Cable window lifter according to at least one of the preceding claims, characterized in that the spring stiffness and preload of the spring ( 10 ) on the frictional forces of the cable window lifter and the weight of the window pane ( 6 ) are matched to compensate for these forces.