EP1641993B1 - Deflection device for a motor vehicle window lift - Google Patents

Description

The invention relates to a deflection device for a motor vehicle window lifter according to the preamble of claim 1.

Such a deflection device comprises a deflecting element for deflecting a pulling means of the window lifter and spring means for tightening the traction means in order to compensate for an elongation of the traction means.

The deflecting element can be, for example, a cable pulley by means of which a pulling means of a window lifter is deflected in the form of a drive cable in order to guide the drive cable along the displacement direction of the window pane to be adjusted with the window lifter. The traction means or drive cable is used to couple the window to be adjusted to the drive device of the window and is moved by this. By the window pane is connected via a driver with the drive cable, it is taken along a movement of the drive cable along its extension direction. A driven along the direction of displacement of the window to be adjusted drive cable causes therefore, upon activation of the drive of the window regulator, the desired adjustment movement of the window pane.

As a result of the settling behavior of the (live) vehicle components, in particular plastic components, to which the window lifter is attached, it comes after prolonged operation to an apparent (relative) elongation of the traction means or drive rope (formation of a so-called rope loose) relative to the said vehicle components , which must be compensated so that the traction means continues to be defined and guided tightly along the direction of displacement of the window to be adjusted and can transmit the forces generated by the window lift drive to the window pane. Furthermore, due to the considerable tensile forces acting on the traction means or drive cable during operation of the window regulator, a certain direct elongation of the traction means itself can also take place.

It is known to maintain the tension of the traction means to use biased spring means which engage a movably mounted deflecting the window regulator and have a tendency to move or pivot this so that the traction means is tightened by the displacement of the deflector.

From the DE 101 38 586 A1 a guide arrangement for a motor vehicle window lifter is known, which has a longitudinally extended guide rail along which a window pane is adjustable in height by a traction means. The guide arrangement further comprises a deflection device with a deflecting element for deflecting the traction means and a device for longitudinal compensation, with which an elongation of the traction means can be compensated by the traction means is tightened irreversibly. In this case, the deflection element for length compensation is displaceable along a direction substantially perpendicular to the adjustment of the window pane direction. The deflecting element is pretensioned with an elastic element in such a way that it has the tendency to tighten the traction means.

The invention is based on the problem of further improving a deflection device of the aforementioned type.

This problem is solved by the invention by providing a deflection device with the features of claim 1.

Thereafter, it is provided that the deflection element is movably mounted on a receptacle and can be brought to compensate for an elongation of the traction means arranged on the receptacle spring means in a plurality of different positions, wherein the receptacle can be fastened together with the deflecting element and the spring means as a preassembled module on the window is. According to the invention a fixing device is provided to fix the deflecting element or the slider to the receptacle, as long as the preassembled module is not yet mounted on a window. Because only after the installation of said deflecting and compensation assembly to a window and the commissioning of the window lift yes a movement of the deflecting element or slider in the receptacle should be possible to compensate for an elongation of the traction device. In the preassembled state, however, the corresponding components should as far as possible be fixed to one another in order to ensure simple transport of the preassembled structural unit. The fixing device according to the invention is automatically unlocked upon start-up of the window by the action of the traction means on the deflection, so that then the deflection or the slider is movable in the recording. After unlocking the fixing device, the deflecting element or the slider is held in its respective equilibrium position by the interaction of the spring means and the pulling means of the window regulator.

Under the window are present in this case not only the drive means of the window, such. Example, a drive motor, a provided for coupling the drive motor with the traction mechanism gear, a driver for the window, etc. understood, but also the windows supporting the components such. B. a carrier element in the form of a carrier plate. Hereby or at one for the guidance of with The tensioning means connected to the driver guide means, the pre-assembled on the receiving assembly is preferably attached.

The "elongation" of the traction means in the present case not only a direct elongation of the traction means itself understood, but in general a relative change in the length of the traction means with respect to the vehicle components (door components, such as a support plate of the window regulator), where the window is arranged, ie in particular, an apparent elongation of the traction device, the settling behavior of those door components (where, for example, the deflecting elements are fixed to guide the traction means) is due.

The solution according to the invention has the advantage that all the components of a deflection device for a pulling means of a window lifter, which also serves to compensate for elongation of the traction means, including the necessary spring means and the means for movable mounting of the deflecting element, can be pre-assembled as a separate unit, the then completely pre-mounted on the window is fastened. As a result, the flexibility in the assembly of a window lift is further increased.

According to a preferred embodiment of the invention, the receptacle forms a housing on or in which the deflection device is movably mounted.

For movable, in particular displaceable, mounting of the deflecting element on the receptacle, there may be provided a guideway, by means of which the deflecting element is guided in such a way that it can be brought into different positions to compensate for elongation of the traction device, each effecting a defined tightening of the traction means.

For this purpose, the traction means is preferably arranged on a slider movably guided on the receptacle, which may be a separate part of the deflecting element, with which the deflecting element by suitable connecting means, for. B. is connected by riveting. The necessary connection elements may be provided on the deflecting element, for. B. in the form of a stepped bolt, which passes through an associated opening in the slider and whose protruding from the opening, the deflecting remote end portion is folded over such that a positive connection between the deflector and slider consists.

Of course, the connecting means may conversely also be provided on the slider and pass through an associated opening in the deflecting element.

The spring means with which a movement of the deflecting element can be triggered for tightening the traction means are preferably formed by at least one prestressed spring element which is mounted on the receptacle of the deflecting element and engages the deflecting element or the associated slider.

The fixing device for producing a positive connection between the deflecting element or slider and the receptacle can be set up and designed, for example, as a latching connection.

Furthermore, locking means are provided to lock the deflecting element in its by the interaction of the spring means with the traction means defined equilibrium position; These may be, for example, interlocking means in the form of cooperating toothing areas.

One of the two toothed areas is arranged on the receptacle or an insert arranged in the receptacle and the other toothed area the glider. For a particularly fine-stage positioning of the deflecting element on the receptacle, the toothing regions can be provided on one of two mutually associated oblique planes.

During operation of the window lifter, the locking means are locked by the tension of the traction means, so that the deflection element remains continuously in a certain position on the receptacle, as long as the traction means is sufficiently tensioned. Is it during operation of the window lift to an elongation of the traction device, d. H. a rope lot of a drive cable, it can be due to the decreasing tension of the traction means unlocking the locking means and provided for cable tightening spring means cause a displacement of the deflector (via the associated slider), due to which the rope again tense and locked the deflector in a new equilibrium position can be.

The deflection device according to the invention is particularly suitable for use in so-called railway window lifts, in which a plurality of guideways for associated driver of the window regulator is integrated in a carrier.

The cable length compensation is of particular importance when the (web-controlled) window lifter is used in conjunction with a so-called short-stroke application for frameless window panes, so that the window pane is lowered for a short time each time the associated vehicle door is opened and closed. In this case, the adjustment system, in particular the cable, is subject to a very high load, which usually leads to such a long cable length over the service life that the short-stroke function and any anti-pinch mechanism that may be provided can no longer be operated with sufficient safety.

A window regulator, in particular web window lifter, in which the deflection device according to the invention is applied, is characterized by the features of claims 18 and 19, respectively.

Further features and advantages of the invention will become apparent in the following description of exemplary embodiments with reference to the figures.

Fig. 1a

einen Ausschnitt eines Bahnfensterhebers mit einer daran angeordneten Umlenkeinrichtung, die ein beweglich gelagertes Umlenkelement für ein Zugmittel des Bahnfensterhebers aufweist, welches für eine Straffung des Zugmittels verlagerbar ist;

Fig. 1b

die Anordnung aus Figur 1a nach einer Verlagerung des Umlenkelementes;

Fig. 2a und 2b

eine perspektivische Darstellung sowie eine Explosionsdarstellung der Umlenkeinrichtung aus den Figuren 1a und 1b;

Fig. 3a bis 3d

jeweils eine Schnittdarstellung unterschiedlicher Zustände der Umlenkeinrichtung aus den Figuren 2a und 2b, nämlich im vormontierten Zustand der Umlenkeinrichtung, nach dem Einbau in einen Fensterheber, beim Auftreten einer Seillose sowie nach dem Ausgleich einer Seillose;

Fig. 4a und 4b

eine Abwandlung der Umlenkeinrichtung aus den Figuren 2a und 2b vor und nach einem Seillängenausgleich;

Fig. 5

einen Querschnitt durch die Umlenkeinrichtung aus den Figuren 4a und 4b nach einem Seillängenausgleich;

Fig. 6a und 6b

eine weitere Abwandlung der Umlenkeinrichtung aus den Figuren 2a und 2b vor und nach einem Seillängenausgleich;

Fig. 7a und 7b

jeweils eine perspektivische Darstellung von Arretierungsmitteln zur Arretierung des Umlenkelementes der Umlenkeinrichtung aus den Figuren 6a und 6b.

Show it:

Fig. 1a

a detail of a web window lifter with a deflection device arranged thereon, which has a movably mounted deflection element for a traction means of the web window lifter, which is displaceable for a tightening of the traction means;

Fig. 1b

the arrangement FIG. 1a after a displacement of the deflection element;

Fig. 2a and 2b

a perspective view and an exploded view of the deflection of the FIGS. 1a and 1b ;

Fig. 3a to 3d

in each case a sectional view of different states of the deflection of the FIGS. 2a and 2b , namely in the preassembled state of the deflection, after installation in a window, when a rope lot occurs and after the compensation of a rope slack;

Fig. 4a and 4b

a modification of the deflection of the FIGS. 2a and 2b before and after a rope length compensation;

Fig. 5

a cross section through the deflection of the FIGS. 4a and 4b after a rope length compensation;

Fig. 6a and 6b

a further modification of the deflection of the FIGS. 2a and 2b before and after a rope length compensation;

Fig. 7a and 7b

in each case a perspective view of locking means for locking the deflecting element of the deflection of the Figures 6a and 6b ,

FIG. 1a shows a web window lifter with a drive motor M and with the drive motor M downstream gear G, with a traction means in the form of a drive cable S of the window is driven, which in turn deflected by means of a deflecting element E in the form of a pulley a deflection U so is that it extends along the guideways B of the web window lifter. The three guideways B extend along the displacement direction of the window to be adjusted by means of the window and serve for the slidable mounting of a driver, on the one hand carries the window to be adjusted and the other is connected to the drive cable S. Since the drive cable S is guided by means of the deflecting element E of the deflection device U along the direction of extension of the guideways B, the driver receiving the window pane can be displaced along this guideways B by activating the drive motor M through this drive cable in order to raise or lower the window pane connected thereto.

The deflection E of the deflection U is slidably mounted in a receptacle A, which is fixed to the support element (support plate T) on which the guideways B arranged (integrally formed) and also carries the drive means M, G of the window.

FIG. 1b shows the arrangement FIG. 1a after a displacement of the deflecting element E in the receptacle A, which has led to a tightening of the drive cable S for the compensation of a cable slack (induced by settlement behavior of the carrier plate T).

The streamlining of a drive cable by moving a deflecting element of a window lifter is basically known. In the following, therefore, particular attention will be paid to the particularities of the present deflection device U, which is characterized in particular by the fact that it forms a unit which can be preassembled outside the window regulator in which the functions of a deflection of the drive cable S and of a cable length compensation (compensation of a cable slack) are combined.

The FIGS. 2a and 2b show the deflection U from the FIGS. 1a and 1b in a perspective view and in an exploded view. The deflection device comprises a housing-like receptacle 1 with a base surface 10, projecting perpendicularly from the two inwardly angled legs 11, 12 which define a longitudinal guide 13 for a slider 2 which is delimited by a rear wall 14 of the receptacle 1 and extends along a longitudinal direction L. engages with lateral guide and sliding surfaces 23 in the longitudinal guide 13. The slider 2 is thereby along a longitudinal direction L, which corresponds to the extension direction of the longitudinal guide 13, slidably mounted in the housing-like receptacle 1.

The slider 2 has a passage opening 25, on which by means of a stepped bolt 35, a deflecting element is attached in the form of a pulley 3, a guide portion 31 for the drive cable to be deflected and a mounting portion 32 for transferring the drive cable to the guide portion 31 during assembly of the window having.

In the assembled state of the window, so when the pulley 3 is looped by the drive cable of the window, this has due to the existing cable tension tends to push the pulley 3 together with the slider 2 against the rear wall 14 of the receptacle 1. However, spring means 4 counteract this in the form of two prestressed springs 41, 42, which are supported on the one hand on the rear wall 14 of the receptacle 1 and on the other hand on the slider 2 and have the tendency to move the slider 2 away from the rear wall 14 of the receptacle 1. As a result, an elongation of the drive cable can be compensated for and kept in an always streamlined state.

In order to fix the slider 2 in certain longitudinal positions relative to the receptacle 1, an insert 15 is arranged with a spline 16 in the receptacle 1, which is held by a spring 17 in a defined position within the receptacle 1. The toothing 16 of the insert 15 is associated with a corresponding counter-toothing of the slider 2, so that is locked in a meshing of the two gears of the slider 2 in a specific position within the receptacle 1, as described below with reference to FIG FIGS. 3a and 3b will be described in more detail.

Further, a latching hook or clip 24 is disposed on the slider 2, which can engage in an associated latching or Klippsbereich 14a of the back wall 14 of the receptacle 1, so that in the preassembled state from the receptacle 1, the slider 2, the pulley 3 and the spring means 4 existing unit of the slider 2 (and thus also the deflection device 3 and the spring means 4) are fixed to the receptacle 1.

FIG. 3a shows a longitudinal section through the deflection of the FIGS. 2a and 2b in the preassembled state, ie before their integration into one Motor vehicle window lifter. It can be seen that the teeth 16 of the insert 15 of the receptacle 1 on the one hand and the counter-toothing 26 of the slider 2 are disengaged in this state and that the slider 2 by engaging his locking or Klippshakens 24 in the latching or Clip area 14a on the rear wall 14 of the receptacle 1 is fixed in this. Furthermore, it can be seen that the trained as a hollow body with an axial through hole stepped bolt 35 of the pulley 3 passes through the associated passage opening 25 of the conductor 2 and is folded at its free ends such that a non-positive and positive connection between the pulley 3 and the slider. 2 is present.

In the in FIG. 3a shown state, consisting of the receptacle 1, the slider 2, the deflecting element 3 and the spring means 4 assembly, z. B. by means of screws or rivets, mounted on a window and it is the drive cable S brought to the guide portion 31 of the pulley 3. If now in the first operation of the fully assembled window lift the driver (and thus the window to be adjusted) is moved to the lower stop of the window, then pulls the drive cable S, compare FIG. 3b , the slider 2 against the action of the spring means 4 against the rear wall 14 of the receptacle 1, wherein the teeth 16 of the insert 15 and the associated counter teeth 26 of the slider 2 engage each other and the latching or Klippsverbindung 14a, 24 according to Fig. 3b is solved. As a result, the slider 2 is locked by means of the insert 15, which is defined by a spring 17 in the receptacle 1, and by the action of the interlocking teeth 16, 26 in a defined longitudinal position within the receptacle 1, in the next position to the back wall 14 of the receptacle 1 out, which is possible in the interaction of the teeth 16, 26.

Upon the occurrence of a ropeless so an elongation of the drive cable S and a decrease in the cable tension, get the two gears 16, 26 disengaged and the slider 2 and thus the pulley 3 are removed under the action of the spring means 4 (see FIGS. 2a and 2b ) something of the rear wall 14 of the receptacle 1, as shown in FIG Figure 3c ,

Finally, if the rope elongation has assumed such an extent that the longitudinal displacement of the slider 2 with respect to the back wall 14 of the receptacle 1 corresponds to a tooth width, then the two toothings 16, 26 come according to 3d figure again engaged, so that the slider 2 and the deflecting element 3 are in turn locked in the defined position in the receptacle 1.

FIG. 4a shows a modification of the deflection of the FIGS. 2a and 2b , wherein there is a difference in the design of the guide means, by means of which the slider 2 in the longitudinal direction L is movably guided in the receptacle 1. For this purpose, the slider 2 on lateral guide extensions 23 ', which are guided in associated longitudinal slots 13' of the receptacle 1. Furthermore, the spring means 4 at the in FIG. 4a shown deflecting device formed by a single biased spring element 40.

FIG. 4b shows the deflection of 4a after a shift of the pulley 3 under the action of the spring element 40 to compensate for elongation of the drive cable S, the slider 2 in the longitudinal guide 13 ', 23' was performed.

Based on a synopsis of FIG. 4b with the longitudinal section FIG. 5 It is also clear that in this case the teeth 16 of the receptacle 1 is not formed on a separate insert, but directly on the base plate 10 of the receptacle 1. Furthermore, the counter-toothing of the slider 2 is formed only by a single toothed element.

In the FIGS. 6a and 7a is a further modification of the deflection of the FIGS. 2a and 2b in the present case, the receptacle 1 is not housing-shaped but is plate-like and has slits 13 "with threading areas 130 for guiding the slider 2. Furthermore, the receptacle 1 and the slider 2 each have an inclined plane provided with a toothed area 19 or 29 18, 28 together, which allows a particularly fine-stage locking of the slider 2 in different longitudinal positions on the receptacle 1. According to the implementation of a triggered by the spring means 4 in the form of a prestressed spring element 40 movement of the receiving side inclined plane 18 in a longitudinal movement of the slider associated inclined plane 28 is the direction of action of the spring means 4 in this case perpendicular to the longitudinal direction L along which the guide slots extend 13 "for the slider 2 and along which the slider 2 is moved to the rope length compensation, as shown in FIGS FIGS. 6b and 7b can be seen, in which the deflection of the Figures 6a and 6b after the maximum rope length compensation by relaxation of the spring element 40 and corresponding displacement of the inclined planes 18, 28 and the slider 2 is shown.

Claims (19)

1. Deflection device for a motor vehicle window lifter with

   - a socket (1),

   - a deflection element (3) for deflecting a traction means (S) of the window lifter and

   - spring means (4) for tightening the traction means (S),

   wherein the deflection element (3) is mounted slidably with a slider (2) on the socket (1) and in order to tighten the traction means (S) can be brought by the spring means (4) mounted on the socket (1) into a number of different positions on the socket (1), wherein the socket (1) can be fixed together with the deflection element (3) and the spring means (4) as one preassembled structural unit on the window lifter, and wherein a fixing device (14a, 24) is provided on the socket (1) in order to fix the slider (2) on the socket (1) so long as the preassembled structural unit (1, 2, 3, 4) is not yet mounted on the window lifter,
   characterised in that
   the fixing device (14a, 24) is set up for providing a positive locking connection between the deflection element (3) and the socket (1), which can be automatically released through the action of the traction means (S) when the window lifter is brought into operation.
2. Deflection device according to claim 1, characterised in that the socket (1) forms a housing.
3. Deflection device according to claims 1 or 2, characterised in that a guide (13, 13', 13") is provided on the socket (1) by means of which the deflection element (3) is guided such that it can be brought into different positions in order to tighten the traction means (S).
4. Deflection device according to one of the preceding claims, characterised in that the deflection element (3) is mounted displaceable on the socket (1).
5. Deflection device according to claim 4, characterised in that the slider (2) and the deflection element (3) are formed by separate parts which are connected together.
6. Deflection device according to claim 5, characterised in that the deflection element (3) is fixed on the slider (2) by means of a stepped bolt (35) which engages an opening (25) of the slider (2).
7. Deflection device according to claim 3 and one of claims 5 or 6, characterised in that the slider (2) is guided in the guide (13, 13', 13").
8. Deflection device according to one of claims 5 to 7, characterised in that the spring means (4) are formed by at least one pretensioned spring element (40, 41, 42) which engages on the slider (2) and has the tendency to move the slider (2) such that the traction means (S) becomes tightened.
9. Deflection device according to one of the preceding claims, characterised in that the fixing device (14a, 24; 5) is provided for a positive locking connection constituted by a detent connection.
10. Deflection device according to one of the preceding claims characterised in that locking means (16, 26; 19, 29) are provided for locking the deflection element in different positions on the socket (1).
11. Deflection device according to claim 10, characterised in that the locking means (16, 26; 19, 29) are formed by positive locking means, in particular by toothed regions associated with each other.
12. Deflection device according to claim 11, characterised in that a toothed region (16, 19) is provided on the socket (1) or on an insert part (15, 18) fitted therein.
13. Deflection device according to claim 11 or 12, characterised in that another toothed region (26, 29) is provided on the slider (2).
14. Deflection device according to one of claims 11 to 13, characterised in that the toothed regions (19, 29) are each provided on one of two inclined planes (18, 28) which are associated with each other and can be moved relative to each other.
15. Deflection device according to one of claims 10 to 14, characterised in that the locking means (16, 26; 19, 29) are locked during operation of the window lifter through the tension of the traction means (S).
16. Deflection device according to claim 15, characterised in that the locking means (16, 26; 19, 29) can be released during relaxation of the traction means such that the deflection element (3) is movable under the action of the spring means (4) in order to tighten the traction means (S).
17. Deflection device according to one of the preceding claims, characterised in that it is set up and provided for use with a path window lifter with several guideways (B) running parallel to each other for a follower of the window lifter.
18. Motor vehicle window lifter with

    - a drive (A, G),

    - a traction means (S) which can be driven by the drive (A, G) and

    - a deflection device (U) for the traction means (S),

    characterised by
    a deflection device (U) according to one of claims 1 to 17.
19. Window lifter according to claim 18, characterised in that the window lifter is designed as a path window lifter with a number of guideways (B) arranged side by side for at least one follower which is connected to the traction means (S).

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