DE3037851C2 - Window regulators, in particular for motor vehicles - Google Patents

Description

The invention relates to a window regulator, in particular for motor vehicles, with one on a window pane attacking lifting rail, one connected to the lifting rail, along a guide rail displaceable driver for guiding the lifting rail and thus the window pane on a predetermined Way and a drive to raise and lower the window pane.

In known window regulators of this type (z. B. DE-OS 30 609) the lifting rail is rigidly attached to the driver. The drive (crank drive or drive with electric motor) attacks the driver. The one with the known window regulators maximum achievable stroke corresponds to the distance between the upper and lower End position of the driver on the guide rail, i.e. a maximum of the guide rail length minus the length dimension of the driver parallel to the guide rail. In cases where the henster disc is not sufficiently guided laterally, the carrier carrying the lifting rail must be sufficiently counteracted Tilting be secured. With a given guide rail length, this reduces the maximum achievable Window lift hub. In some cases, for example when the door shaft height of the motor vehicle door is in the area of the window height, the one through the

• I 3 4

U is the length of the guide rail and the driver length and the ends of the scissor arms in the end areas

!: Tested window lift stroke not sufficiently large. the lifting or driving rail on the lifting

! The invention is based on the object, a front or the driver rail are mounted, whereby one

The direction of the type mentioned at the outset is to be designed in such a way that the rod has a sufficient base length

■ i that the window pane carrying, from the driver 5 It is proposed that the driver with a

β along the guide rail guided lifting rail elongates in the direction of the guide rail, on the guide

U over a longer distance than the driver moves the guide rail by means of sliding pieces guided base plate

This task is carried out with a device of the kind that has a driver rail

according to the type solved in that the drive at one of the longitudinal ends or in any position

h the lifting rail engages that the connection of He- 10 between the sliding pieces on the base plate is

The elongated base plate ensures a

k movements of the lifting rail relative to the driver par- sufficiently stable guidance on the guide rail;

allel stiff to the window pane level, from a see- the lifting rail held by the scissor linkage

The linear guide formed by the linkage takes place between the driver rail and the other

_r i between the lifting rail and the driver a longitudinal end of the base plate without crossing the scissors

i: i has play within which the lifting arms are moved, which allows the driver

ne is freely movable relative to the driver and that the rail and the lifting rail on the same side of the

; 3 to arrange the driver in its lower end position with a scissor linkage.

.! ' Stop part interacts with the guide rail To guide the driver on the guide

The stroke enlargement of the lifting rail compared to 20 rail to further improve it is proposed that

the driver is a longitudinal edge of the at least one of the sliders through the linear guide

% specified play ensured. Located around the guide rail and on the base plate

j the lifting bar rests, for example, in the lower, remote side of the guide bar

\ Window lifter end position in its closest La- In an advantageous embodiment of the invention is

! ge to the driver, in the upper end position 25 the lifting bar can preferably be in the area of its length.

t of the driver, the lifting bar corresponding to the counter center with an elongated hole of the driver, if necessary

Movement play can be moved further upwards. the base plate is provided with a protrusion that extends through the base plate,

S ₁ The rigidity of the lifting rail with the driver which is in contact with the guide rail and / or

connecting linear guide with respect to the specified one to which the pull rope is attached.

That the lifting rail overall the course of possibly I NEN tilting movements ensures that the lifting rail 30 extends

\ ',' precisely follows the guide rail that is sufficiently curved in all of its possible positions, which

;; is guided stably. the built-in window regulator. In

'' A scissor linkage is actually interspersed with the FR-PS of a compact embodiment of the

13 73 997 known The lifting rod connects here the jump an elongated hole in the base plate.

Lifting rail with a base that is suitable for use on the vehicle door. whereas in the invention the scissor-driven window lifter drives in question, z. B. Linkage the lifting rail with the window lifter drive or threaded cable drive along the guide rod, Rail slidable driver connects in the way of its particularly simple structure, however known arrangement, the drive for lifting preferably uses a cable or Bowden cable drive. and lowering the window pane on a scissor arm 40 sets with a pull rope attached to the lifting rail, of the scissor linkage. The invention see also proposed that the rope nipple rengestänge ensures that tilting moments of the pulley leading two rope pieces of the pull rope in the rope nipvon The lifting bar is transferred to the driver by means of receptacles arranged close to one another and from this step onto the openings fixed to the motor vehicle door, which are located on one of the guide rail guide rails. 45 parallel side surface of the cable nipple in the longitudinal direction. It is proposed that the direction of displacement be formed in. With the cable pull resp. The Bowden cable drive can push the lifting rail as much as possible is to be moved far up or down to the longitudinal direction of the guide rail until the runs inclined, preferably at an angle between the upper and lower rope pieces of the leading rope nipples see 5 ° and 20 °, ideally at an angle of 50 °, the pull rope runs approximately perpendicular to the guide rail, about 10 °. This is achieved with simple means in the case of the cable nipples of known window lifter drives that the window pane enters the two pieces of rope at the radial end faces during part of the stroke movement in the longitudinal direction of the guide rail and an elongated, cylindrical, to the guide rail during the remaining part of the lifting movement, e.g. B. at the parallel cable nipple. Reduced accordingly The upper end of the stroke path, in the direction of displacement, is approximately 55 with a given deflection roller arrangement can be. In this way, the maximum stroke that can possibly be achieved in a complicated manner by the axial length can also be deformed Window panes in motor vehicle doors with a rope nipple. To avoid this reduction in stroke will. According to the invention, it is proposed that the two pieces of rope of the traction rope leading to the rope nipple, which is simply constructed and yet mechanically stable, in Bile leadership wiiu cm SncfcngcStänge suggested 6ö den o £ iiüippc! by closely arranged with two scissor arms, one end of which occurs at the receiving opening, soft on one to the Füh driver or is articulated on the lifting rail, the side surface of which is parallel to the longitudinal direction of the rail Ren each other end are formed in an elongated hole of the retaining cable nipple.

rail or the driver can be displaced and swiveled in the following is stored and which is explained in the area of their laning example. It shows

are hinged to one another in the middle. F i g. 1 is a front view of an inventive

it is useful if the driver with one to the window regulator;

Lifting rail formed parallel driver rail Fig.2 a side view from the left of the upper part

the arrangement according to FIG. 1 on an enlarged scale;

F i g. 3 is a side view similar to FIG. 2 of the lower part of the arrangement according to FIG. 1;

4 shows an enlarged sectional view of the arrangement according to FIG. 1 in section along the line IV-IV;

5 shows a detailed section of the arrangement according to FIG. 1 in section along the line V-V; and

F i g. 6 shows a detailed section along the line VI-VI.

The F i g. 1 to 6 show a window regulator 10 installed in a motor vehicle door, with which a window regulator 10 shown in FIG indicated window pane 12 can be raised and lowered again. In the side views of the F i g. 2 and 3, a door inner skin 14 is indicated with a dash-dotted line, on which the window regulator 10 is attached.

To move the window pane 12, the window lifter 10 engages with a lifting rail 16 on the lower transverse edge of the window pane 12 in FIG. 1. The lifting rail 16 is in turn connected via a scissor linkage 18 to a driver 20, which in turn is attached to a guide rail 22 so as to be displaceable in the longitudinal direction thereof Door inner skin 14 screwed tight To move the window regulator, a Bowden cable drive 28 is provided, which is shown in FIG. 1 is only indicated schematically One recognizes a drive unit 30 with a cable drum 32 which can be rotated either by means of a hand crank (not shown) or an electric motor in the direction of the double arrow A. A traction cable 34 looped around the cable drum 32 is guided in a closed loop over two pulleys which a pulley 36 at the in F i g. 1 lower end plate 24 and the other deflection roller 38 is rotatably mounted on the upper end plate 26 Between the drive unit 30 and the lower or upper end plate 24 and 26, the pull cable is each passed through a Bowden cable sleeve 40. A screw sleeve that accommodates the corresponding end of the Bowden cable sleeve 40 42 is attached both to the lower end plate 24 and to the upper end plate 26 via a screw-in thread 44 in order to be able to adjust the tension of the traction cable 34. The drive connection between the pull rope 34 and the lifting rail 16 is produced by a nipple 46 attached to the lifting rail 16 (see FIGS. 1 and 5), which will be discussed in greater detail below. When the Bowden cable drive 28 is actuated, the cable nipple 46 is moved back and forth between the deflection rollers 36 and 38, taking along the lifting rail 16 and with it the window pane 12; As will be explained in more detail below, the scissor linkage 18 connecting the lifting rail 16 to the driver 20 ensures, on the one hand, that the lifting rail 16 prevents lateral displacement (ie against displacement in the direction of the lower transverse edge 13 of the window pane 12) and against tilting in the window pane plane is secured and on the other hand that the lifting rail 16 can be moved over a longer distance than the driver 20, which leads to an increase in the stroke (distance between the end positions of the lifting rail 16) with unchanged window regulator installation height (vertical distance c between the upper Edge of the window lifter 10 including the lifting rail 16 in its upper F.ndstellung and the lower edge of the window lifter 10, ie the end plate 24) leads.

The guide rail 22 is designed as an L-rail (see FIG. 4) and corresponds to the curvature of the Arched window pane 12 (see FIGS. 2 and 3). The guide rail 22 is connected to the two end plates 24 and 26 spot welded; in Fig. 1 a spot weld 48 is indicated. The lower end plate 24 is at one for Reinforcement of bent-up edge 50 with embossed nuts 52 for fastening to the door inner skin 14 educated. The upper end plate 26 also has a bent edge in the region of the deflection roller 38 54 is provided, which, like the screw-in thread 44 with the screw sleeve 42 carrying section 56 of End plate 26 in FIG. 2 has broken away. A double bend is used for fastening to the door inner skin 14 Fastening tabs 60 offset towards the door inner skin 14 and provided with a fastening nut 58 (see Figs. 1 and 2). The upper transverse edge of the guide rail 22 is denoted by 62. In the area of this Transverse edge 62 is the end plate 26 with a bent up, serving as a stop for the driver 20 Sheet metal tabs 64 are provided. A corresponding sheet metal tab 66, also serving as a stop, is also on the lower end plate 24 formed.

As shown in FIG. 1, the longitudinal direction of the guide rail 22 is inclined in relation to the vertical direction (ie in relation to the direction perpendicular to the lower transverse edge 13 of the window pane 12 and lying in the window pane plane), forming an angle oc of approximately 10 °.

The driver 20 consists of an elongated base plate 68 running along the guide rail 22 and one to the transverse edge 13 of the window pane 12 parallel driver rail 70, which in the area of its longitudinal center integral with the in F i g. 1 lower end of the base plate 68 is connected. At the top of the Base plate 68 and at the lower end of the base plate 68 or at the lower edge of the driver rail 70 in the In the region of the center of its length, two sliders are arranged, of which the ones shown in FIG. 1 each left Sliders 72 rest on the left side of a leg 74 of the guide rail 22 and each right sliding pieces 76 on the right side of the leg 74. As in FIG. 5, there are the sliders 72 made of sheet metal tabs 78 which are bent over toward the guide rail 22 and which are encapsulated with a plastic body 80 are. Due to the relatively large distance between the pairs of sliders at the ends of the driver 20 one obtains a correspondingly large guide base length of the driver 20 on the guide rail 22, so that larger tilting moments from the driver, lying in the plane of the window pane 12 20 can be transferred to the guide rail 22 without fear of deformation of the components would have to.

In the F i g. 1,4 and 5 is another slider 78 ' recognizable which on in F i g. 1 right longitudinal edge of the base plate 68 is attached approximately in the middle of the length and with a substantially L-shaped section 80 in the region of the outer kink edge of the L-shaped cross-section Guide rail 22 rests on both legs 74 and 75 of the guide rail 22 The slider 78 'therefore serves as an additional lateral guide in addition to the sliding pieces 72 and 76, so that the sliding pieces 76 can be omitted. In addition, the slider 78 'ensures that the (horizontal) distance between the guide rail 22 and the driver 20 a predetermined determined by the slider 78 ' Distance does not exceed As in F i g. 4 can be seen, there is also the slider 78 'from a with a Plastic part overmolded towards the guide rail 22

bent Ulech flaps 82 of the base plate 68. Finally, a rectangular slot 84 is punched out of the base plate 68 designed as a stamped sheet metal part, through which a still to be treated fastening part 86 of the lifting rail 16 passes (see Figures 1, 4 and 5).

The lifting rail 16 consists of a base rail 88 parallel to the driver rail 70, on both of which Ends over a Z-angle 90 each a U-shaped, the The lower transverse edge of the window pane 12 encompassing fastening tab 92 is attached. Here is the Z-bracket 90 spot-welded on the one hand to the fastening bracket 92 and on the other hand via a screw connection 94 attached to the base rail 88. In the area of its mid-length above the base plate 68 and the guide rail 22 is the base rail 88 with one shown in FIG. 1 obliquely downwards parallel to the guide rail 22 extending flat projection 94 is provided to the fastening surface for said fastening part on the base rail 88 to enlarge.

The scissor linkage 18 connecting the lifting rail 16 to the driver 20 consists of a first scissor arm% and a second scissor arm 98 which, in the region of their longitudinal centers, extend over the distance shown in FIG. 4 pivot pins 100 shown are hinged to one another like scissors. The in Fig. 1 left end of the first scissor arm% is hinged to the left end of the driver rail 70, as is the left end of the second scissor arm 98 to the left end of the base rail 88. The two articulation points are vertical (direction arrow B in Fig. 1) one above the other. The right end of the first scissor arm is slidably and pivotably mounted in an elongated hole 102 at the right end of the base rail 88, and accordingly the right end of the second scissor arm 98 in an elongated hole 104 at the right end of the driver rail 70 the lifting rail 16 can be displaced precisely in the vertical direction with respect to the driver 20 while maintaining its orientation (ie the parallelism between the driver rail 70 and the lifting rail 16).

As shown in FIGS. 1 and 4 can be seen, the scissor arms S6 and 98 are both on the side of the driver rail 70 remote from the guide rail 22 and the base rail 88 on the driver or. Base rail 70 and 88 attached. Furthermore, the ends of the scissor arms 96 and 98 are more or less cranked so that the intersection (pivot pin 100) of the scissor arms% and 98 is on the side of the base rail 88 facing away from the guide rail 22 is the lifting rail 16 during all adjustment positions at a constant small distance from the driver 20 and the guide rail 22, so that the moments occurring at the distance between the parts guide rail 22, driver 20 and lifting rail 16 during operation are relatively small. F i g. 1 shows with a solid line the upper end position of driver 20 and lifting rail 16 as well as FIG. 2; in Fig. 3 with a solid line and in FIG. 1 with a broken line, the respective lower end positions of driver 20 and lifting rail 16 are indicated. It can be seen that the vertical distance a between the base rail 88 and the driver rail 70 in the upper end position of the window regulator 10 is greater than the corresponding distance b in the lower end position of the window regulator 10. With a height c of the window regulator of approx. 50 cm, the difference between a and b is approx. 5 cm. The stroke of the window lifter 10 is increased by this 5 cm compared to a window lifter in which the lifting rail is rigidly attached to the driver. The arrangement and the structure of the fastening part 86 can be seen from FIGS. 1, 4 and 5. With regard to the sectional illustration according to FIG. 14, it should be noted that the dash-dotted line indicates the sections of the components lying above the sectional area and therefore not visible.

The fastening part 86 consists of an approximately U-shaped fastening tab 86, the leg ends of which 106 each pass through a corresponding slot in the lifting rail 16 and that of the guide rail 22 remote top of the lifting rail 16 are bent over. In the limited by the fastening tab 105 and the underside of the lifting rail 16 Space, an insert body 108 is used, which in turn encloses the cable nipple 46 already mentioned In order to mitigate the transmission of bumps between the lifting rail 16 and Bowden cable drives 28, the insert body 108 can be made of damping material, such as. B. rubber, are manufactured.

Like the fig. 4 and 5, the two pieces of rope leading to the rope nipple 46 occur 33 and 35 of the pull rope 34 on a side surface 110 parallel to the longitudinal direction of the guide rail 22 in the Cable nipple 46 a. The corresponding receiving openings are directly in the direction of the guide rail arranged side by side In F i g. 1 is both the upper setting of the lifting rail 16 and thus of the cable nipple 46 as well as, with dotted line, the lower setting of the cable nipple 46. Since the end points of the Rope pieces 33 and 35 are directly next to each other on the rope nipple 46, can with a given distance the Deflection rollers 36 and 38 a large cable nipple stroke can be achieved.

The stability of the entire arrangement is further increased by the fact that the fastening part 86 slides 112 are injection-molded, with which the lifting rail 16 is supported on the leg 75 of the guide rail 22 Pull rope 34 runs between guide hose 22 and base plate 68.

If the window lifter 10 is in its lowest end position (with the window open) (indicated in FIG. 3 and with a broken line in FIG. 1) and the Bowden cable drive 28 is now actuated, the lifting rail 16 and the lift bar move Driver 20 together in the longitudinal direction of the guide rail 22 while maintaining the distance b. The reason for this is that the friction between the driver 20 and guide rail 22 is relatively low due to the sliders 72, 76 and 78 and an increase in the distance b is counteracted by the generally increasing tensile stress of the pull rope 34 in this case only when the driver 20 is in its is reached the upper end position, the lifting rail 16 is moved away from the base rail 88 until in the upper end position of the window lifter 10 the in FIG. 1 shows the distance a shown here. The lifting rail 16 does not move in the longitudinal direction of the guide rail 22, but in the vertical direction. This has the advantage that the window pane is moved approximately perpendicularly towards the corresponding sealing strips at the end of its movement. An upper stop for the window regulator 10 is generally not necessary, since the stop is formed by the upper sealing groove of the window pane 12.

The sequence of movements when opening the window is accordingly reversed. The one I mentioned earlier Sheet metal tab 66 serves as a lower stop for window lifter 10. As shown in FIG. 3 can be seen, suggests on the sheet metal tab 66 of the driver 20; the lowest position of the lifting rail 16 is reached when this reaches the area of the articulation points of the scissor arms 96 and 98 on the driver 20.

The lifting rod 18 shown in the figures is designed symmetrically (rod arms 96 and 98 of the same length as well as elongated holes 102 and 104 parallel to one another), so that the lifting rail 16 can be displaced in parallel with respect to the driver rail 70, i.e. it performs a purely translational movement Change the lifting rail 16 relative to the driver rail 17 as a function of the mutual distance, so the lifting rail 16 relative to the driver rail 70 perform a combined sliding-pivoting movement, the scissor linkage 18 must accordingly be designed asymmetrically. For this purpose, scissor arms 96 and 98 of different lengths can be used, for example; one can also use the two elongated holes 102 and 104, not as in FIG. 1 shown parallel to one another, but rather inclined to one another. The combined displacement and pivoting movement achieved in this way may be necessary for reasons of space or to adapt to special disk shapes or disk seal arrangements.

In order to facilitate the adjustment of the window lifter 10 during installation, the lifting rail 16 can be adjusted relative to the driver rail 70 in the direction of the double arrow C, ie parallel to the lower transverse edge 13 of the window pane 12. As in Fig. 1, a third elongated hole 105 is provided at the left end of the lifting rail 16, which, like the two other elongated holes 102 and 104, run in the longitudinal direction of the mutually parallel rails 16 and 70 . A sensor mounted at the left end of the scissor arm 98 pivot pin 107 passes through the oblong hole 105. To this pivot pin 107 in a predetermined position within the elongated hole 105 to keep a longitudinally of the elongated hole 105 extending set screw 109 is provided, the g in F i. 1 right end in a transverse bore of the pivot pin is rotatably but axially immovably fixed to 107 and the one projecting from the Z-bracket 90, provided with a corresponding internal thread tab 13 with its threaded portion 111 passes through upon rotation of the set screw 109 is this thus in the direction of The screw axis is displaced and with it the pivot pin 107. The lifting rail 16 is accordingly displaced in direction C, since the two elongated holes 102 and 105 leading the rail are parallel to one another. The elongated hole 105 can also be attached to the driver rail 70 instead of to the lifting rail 16, with the same result.

If the elongated hole 105 is arranged perpendicular to the longitudinal direction of the rail instead of in the longitudinal direction of the rail, the inclination of the lifting rail 16 relative to the driver rail 70 can be adjusted, the adjusting screw continuing to run along the elongated hole. 1, if an elongated hole 105 parallel to the longitudinal direction is attached to the lifting rail 16 with a further elongated hole with an adjusting screw at the left end of the driver rail 70, the lifting rail 16 can be adjusted both in the longitudinal direction of the lifting rail and its inclination relative to the driver rail 70.

For this purpose 3 sheets of drawings

Claims (15)

Patent claims: 1. Window lifters, especially for motor vehicles, with a lifting rail engaging a window pane, a driver connected to the lifting rail and displaceable along a guide rail for guiding the lifting rail and thus the window pane on a predetermined path and a drive for raising and lowering the window pane, characterized in that, that the drive engages the lifting rail (16), that the connection of the lifting rails (16) and drivers (20) via a tilting movement opposite of the lifting rail (16) relative to the driver (20) parallel to the window pane plane stiff, from one Scissor linkage (18) formed, linear guide erfoigt, which has a play between the lifting rail (16) and the driver (20), within which the lifting rail (16) is freely displaceable relative to the driver (20), and that the Driver (20) in its lower end position with a stop part (66) with the guide rail (22) cooperates 2. Window lifter according to claim 1, characterized in that the displacement direction (B) in which the lifting rail (16) is displaceable relative to the driver (20) is inclined to the longitudinal direction of the guide rail (22), preferably at an angle (<x) between 5 ° and 20 °, preferably at an angle of around 10 °. 3. Window lifter according to one of the preceding claims, characterized in that the driver (20) with an elongated in the direction of the guide rail (22) on the guide rail (22) is formed by means of sliders (72, 76, 78 ') guided base plate (68) and that a driver rail (70) at one of the longitudinal ends of the base plate (68) or in any position between the sliders (72, 76) is attached to the base plate (68). 4. Window lifter according to claim 3, characterized in that at least one of the sliders (78 ') engages around a longitudinal edge of the guide rail (22) and on the one remote from the base plate (68) Side (75) of the guide rail (22). 5. Window lifter according to one of the preceding claims, characterized in that on the lifting rail (16) a pull cable (34) of a cable or Bowden cable drive (28) is attached. 6. Window lifter according to one of the preceding claims, characterized in that the lifting rail (16) preferably in the area of its longitudinal center with an elongated hole (84) of the driver (20) possibly penetrating the base plate (68) beyond the driver (20) to the guide rail (22) protruding projection (86) is provided, which rests on the guide rail (22) and / or to which the pull rope (34) is attached. 7. Window lifter according to claim 6, characterized in that the two cable pieces (33, 35) of the pull cable (34) leading to the cable nipple (46) enter the cable nipple (46) through closely spaced receiving openings which are located on a side surface parallel to the longitudinal direction of the guide rails (t 10) of the cable nipple (46) are formed. 8. Window lifter according to one of claims 3 to 7, characterized in that the scissor linkage (18) is designed in such a way that the lifting bar (! 6) opposite the driver rail (70) in the direction perpendicular to the longitudinal direction of the driver rail Maintaining the parallelism of the lifting rail (16) and the driver rail (70) is displaceable. 9. Window lifter according to one of claims 3 to 7, characterized in that the scissor linkage is designed in such a way that the lifting rail has a combined sliding-pivoting movement with respect to the driver rail performs 10. Window lifter according to claim «), characterized that the two scissor arms have different lengths. 11. Window lifter according to claim 9 or 10, characterized characterized in that the elongated hole of the lifting rail opposite the elongated hole of the driver rail runs inclined 12. Window lifter according to one of claims 3 to 11, characterized in that the inclination of the lifting rail relative to the driver rail is adjustable is 13. Window lifter according to one of claims 3 to 12, characterized in that the lifting rail (16) opposite the driver rail (70) in the longitudinal direction the lifting rail (16) is adjustable. 14. Window lifter according to claim 12 or 13, characterized in that for adjusting the inclination of the lifting rail or for adjusting the lifting rail (16) in the longitudinal direction thereof in the lifting rail (16) or the driver rail, an elongated hole (105) which is substantially perpendicular or parallel to the longitudinal direction is provided in which a pivot pin (107) attached to one end of the corresponding scissor arm (98) can be fixed. 15. Window lifter according to claim 14, characterized in that the pivot pin (107) can be fixed in the elongated hole (105) by means of an adjusting screw (109) .