WO2017055224A1

WO2017055224A1 - Screening device for motor vehicle, with timing belt

Info

Publication number: WO2017055224A1
Application number: PCT/EP2016/072880
Authority: WO
Inventors: Michel Jincheleau; Sébastien Guilloteau
Original assignee: Advanced Comfort Systems France Sas - Acs France
Priority date: 2015-10-02
Filing date: 2016-09-26
Publication date: 2017-04-06
Also published as: FR3041904B1; FR3041904A1; FR3041903A1

Abstract

The invention concerns a screening device for a motor vehicle, comprising at least one screening fabric (21) that is movable between a retracted position and a deployed position. According to the invention, the fabric (21) carries at least one first series of teeth (25) suitable for engaging with a second series of matching teeth of a timing belt (26), driven by actuation means for controlling the movement of the screening fabric.

Description

Blackout device for a motor vehicle, with toothed belt.

1. The field of the invention

The field of the invention is that of motor vehicles, and more specifically occulting devices, or occulteur, glazed surfaces of such a vehicle. More particularly, the invention relates to devices for concealing a glazed roof and / or a rear window, totally or partially.

Many vehicles have a large glass surface, and in particular a glazed flag, which should sometimes be concealed. The known techniques for training the fabric are generally relatively complex to implement, and may have a relatively large size, particularly at the reel and rails. Thus, it is desirable to reduce, as much as possible, the thickness of the rail (currently, at present, of the order of 20 mm), to increase the roof guard. It is also desirable to increase the bay clear, in both directions X (vehicle length) and Y (vehicle width).

Another difficulty of these occulteurs is that the pavilions are generally curved, in at least one of the directions, and often the two directions X and Y. It is therefore necessary to implement means so that the shade cloth follows, as much what can be done, these curves, which is generally complex and cumbersome.

The invention particularly aims to meet at least some of these needs.

This is achieved with the aid of a concealment device for a motor vehicle, comprising at least one occulting cover movable between a retracted position and an extended position. According to the invention, said fabric carries at least a first series of teeth capable of coming into engagement with a second series of complementary teeth of a toothed belt, driven by actuating means for controlling the movement of said occulting fabric. . According to a particular embodiment, said fabric comprises two first series of teeth, mounted and / or formed respectively on each of the lateral edges of said fabric, and respectively associated with two toothed belts.

According to a particular embodiment, said first and second series of teeth are held in engagement with each other by means of a rail provided for this purpose.

According to a particular embodiment, said rail is glued to the window of said motor vehicle.

This allows in particular an increase in the roof guard, compared to conventional techniques.

In addition to the rails, the front cross member and / or at least one rear support in particular can also be glued to the glass.

According to a particular embodiment, the device comprises at least one motor driving at least one toothed wheel driving said toothed belt.

According to a particular embodiment, the device comprises an axis or a flexible tube, around which said shade cloth is wound in said retracted position.

According to another particular embodiment, the tube and / or the associated return system can be deleted. In particular, the winding and unwinding can be controlled by the cooperation of the belts.

According to a particular embodiment, said fabric is elastic.

According to a particular embodiment, said shade cloth is curved in a direction perpendicular to the direction of deployment of the fabric.

According to a particular embodiment, the device comprises means for adjusting the tension and / or tensioning of said belt, for example at the front and / or at the rear (in particular directly on the roller tube) .

The invention also relates to a motor vehicle, characterized in that it comprises such a concealment device.

Other characteristics and advantages of the invention will emerge more clearly on reading the description of a preferred embodiment of the invention. the invention, given by way of simple illustrative and nonlimiting examples, and the appended drawings, among which:

Figure 1 schematically illustrates an example of flag to which the invention can be applied;

FIG. 2 is a block diagram of one embodiment of the invention;

FIG. 3 shows a portion of the device of FIG. 2;

- Figure 4 is a sectional view along section AA of Figure 3;

FIGS. 5A to 5C illustrate the mounting of the toothed belts and the corresponding drive;

- Figures 6A to 6C schematically illustrate three motorization variants that can be implemented;

- Figures 7A and 7B schematically show two variants of winding mechanisms of the fabric;

FIGS. 8A to 8E illustrate five variants of tensioners of the drive belt;

- Figure 9 shows an example of store for the winding of the fabric;

- Figures 10A to 10B show two variants of implementation of the drive means and the winding means.

1. example of implementation

The directions X, Y and Z correspond hereinafter to the conventional axes of a vehicle, respectively the length, the width and the height.

The occulting device according to the invention can therefore be applied in particular to a glazed flag in both directions, such as that illustrated in FIG. 1. This flag 11 carries two lateral rails 12 and 13, extending substantially according to the X direction of the vehicle (non-parallel rails may be provided in some cases). They provide guidance and / or maintenance of the lateral edges of the blackout cloth 14. As illustrated in Figure 1, these rails here have a length of 1200 mm, and have an arrow of 30 mm. Two crosspieces before 15 and 16 rear were also planned. They present here a length of 800 mm, and an arrow of 17 mm.

According to the invention, the occultation fabric is thus driven by a toothed belt. As illustrated in FIG. 2, presenting a principle path, the occulting fabric 21 has at its free end a pull bar 22, which can be curved along the Z axis (height of the vehicle). This fabric is mounted on a winding shaft 23, which can also be curved along the axis Z. The lateral edges of the fabric 21 each have a notch 25, which may be a notched band reported by gluing or any other suitable means ( sewing, welding ...), or be preformed on the canvas.

A toothed drive belt (crown) 26 is provided on each side of the fabric, so that the notches, or teeth, of this belt engage with those of the toothed belt 25, from the reel shaft 23 and then into a rail 27 (which can be curved in the Z direction) fixed to the paneled part, and / or glazed flag. These aspects are specified later.

A rear support 28 carries a motor 29, which drives a drive pulley 210, itself engaged with the drive belt 26.

According to the embodiments, a single motor 29 may be provided, driving two driving pulleys 210, respectively on each side of the roof, a traversing shaft being provided, or, as illustrated in Figure 2, a connection between two pulleys d. 211 drive connected by an axis 212 out of motor. It is also possible to implement two synchronized motors, associated respectively with one of the belts.

At the front, the belt runs on idle pulleys 213, equipped with a belt tensioner 214 (spring tending to move the two idler pulleys away from each other, for example). According to another implementation, a tensioner can be placed directly on the roller tube, which provides a good synchronization of the drive.

A front cross member 215 connects the front ends of the two rails. It can be curved Z. Finally, a web 216 guiding the fabric extends near the winding axis, and may also have the necessary curve in Z.

As can be seen in FIG. 3, the notched strip integral with the fabric comes into taken with the drive belt, inside the rail. As illustrated more clearly in FIG. 4, which is a view of the section AA, the rail is configured to receive and hold the two belts together, so as to effectively drive the fabric along the entire length of the rail. . The return of the drive belt is done by the upper surface of the rail.

As seen in FIGS. 5A-5C (in which FIGS. 5B and 5C are enlarged partial views of the left and right portions respectively of FIG. 5A), the drive belt 26 is thus driven by the integral gear 52. of the motor shaft 51, then flows between the different pulleys 53 to 55. At the rail (not shown in these figures) the drive belt is connected or meshed with the notched band of the fabric.

In these figures 5A to 5C, to facilitate understanding of the approach of the invention, the belt 25 is presented independently of the fabric, it does not appear. Of course, as already explained, this belt 25 is actually always permanently bonded (gluing, sewing, overmoulding or even preforming the fabric ...) to this belt 25.

Thus, according to the invention, it is possible to remove in particular cables and cable guides usually circulating in the guide rails, which is not necessary according to the invention. It is therefore possible to reduce the thickness of the rail in the Z direction, for example by half (for example from 20 mm to 10 mm) and thus increase the roof clearance. In addition, because these guide rails are very thin in the Z direction, they can effectively comply with the curve in this direction Z, when attaching to the pavilion sheet or glazing. Pre-curving of the rails is no longer necessary. They can be shaped easily, and can in particular be glued on the roof glazing, so, again, to increase the roof guard.

The conventional rigid retractor tube can be replaced by a shaft or a flexible tube, which can be shaped to the shape of the roof, and thus increase the roof guard. The canvas wraps around this axis, freely (not tight). This is a simple store, for example in the form of a plastic curve profile (see Figure 9).

The return mechanism of the canvas (not shown) only ensures the winding of the fabric, but no longer has to ensure the tension thereof in the X direction, unlike the prior art. The return mechanism can be smaller, and occupy less space. Thus, it is possible to reduce the diameter of the roller tube, and thus, again, increase the roof guard.

According to other embodiments, the return mechanism and / or the retractor tube can be deleted.

The tension of the fabric can in particular be achieved:

- In Y using the two rails fixed on the roof and a slightly shorter canvas, ensuring the tension of the latter;

- In X by the connection of the toothed belt with the fabric. The tension can be increased by ensuring an X tension on the fabric before assembly of the notched strip thereon.

The fabric can be elastic, because it is held on both sides by the side rails, the pull bar and the roller tube. This makes it possible to adapt to the various constraints of the desired curves, and to eliminate possible defects of folds.

The draw bar no longer undergoes tension of the mechanism to stretch the fabric, and can be reduced, to reduce clutter.

Furthermore, the belt drive system requires a very low torque for the engine, which allows to use a motor with few couples and therefore little space, which allows easier integration. In addition, it is no longer necessary to provide an anti-pinch function fingers closing the blind, which simplifies or even eliminates the electronic management of the device.

Usually, a rear cross member is provided, which carries a set of motor cable guides cables, winder magazine, retractor support, bulky and complex. According to the invention, this rear crossmember can be replaced by a simple profile, curved if necessary. This makes it possible to reduce the space requirement, and thus to increase the roof clearance, and to increase the roof light in the X direction.

Finally, the belts are compact, in the Y direction, and the rail can be reduced in this direction, compared to the usual techniques. Thus, the light of the flag can be increased in Y.

2. motorization variants

Figures 6A to 6C illustrate three mounting variants of the engine.

According to a first approach, illustrated in FIG. 6A, the two pulleys, or sprockets 61, 62 driving the drive belts 63, 64, are rotated by a motor 65 carrying a traversing shaft 66.

According to a second approach, illustrated by FIG. 6B, the motor 65 is offset, with respect to an axis 67 connecting the two gears 61, 62. An angular gearing system on this axis is provided, comprising for example a first pinion 68 on the axis 67, engaged with a second pinion 69 connected to the motor 65.

According to a third approach, illustrated by FIG. 6C, two separate synchronized motors 65 _A , 65 _B are provided, respectively driving pinion 61 and pinion 62.

3. belt and notch variants

The drive belts 26 (respectively 63, 64) may in particular be made of PU or the like, preferably with steel reinforcement, Kevlar or the like. They must indeed have a good temperature resistance, and a locking of elongation.

The belts 25 integral with the fabric may also be of PU or the like, but without reinforcement. They must in particular allow an effective winding around the winder.

4. reel and lift variants

As illustrated in FIG. 7A, the winding of the fabric can be carried out conventionally around a winding tube 71, mounted on two bearings 72, 73. A return spring 74 is housed inside the tube 71, ensuring winding of the canvas.

In the variant illustrated in FIG. 7B, no mechanism is provided inside the tube 71, and the winding is ensured by the cooperation between the drive belt 26 and the belt 25 integral with the fabric 21, which remain engaged over the tube 71. To ensure the permanent contact between the two belts 25 and 26, despite the thickness variation of the winding of the fabric, the tube 71 can move upwards (arrow 75). In this embodiment, the bearing 72 (respectively 73) can move in a housing 76, so as to compensate for the variation in thickness. A spring 77 acts on this bearing 72, tending to push it upwards (system called "elevator"). Thus, under the effect of this spring, the belt 25 secured to the fabric is pressed against the drive belt 26, and the latter drives the belt 25, and therefore the fabric 21 to which it is secured, so as to ensure unwinding and winding.

5. variants of belt tensioners

FIGS. 8A to 8E illustrate five examples of belt tensioners that can be used in the context of the invention.

According to the embodiment of FIG. 8A, an idle pulley 81 on which the drive belt 82 is driven is mounted on a stirrup 83, itself mounted on a structural element 84. A return spring 85 tends to bring the pulley 81 of the structural element 84, and thus to tension the belt 82.

This mechanism can be duplicated, for two pulleys 81 _A , 81 _B , mounted symmetrically on a structural element 86, as illustrated in Figure 8B.

FIG. 8C illustrates a variant implementing an elevator system as described above. In addition to the drive assembly 87, here comprising a drive gear 871 and two idler pulleys 872, 873, ensuring that the drive belt 82 is pressed onto the pinion 871 over a sufficient portion thereof, the Elevator 88 (see also Figure 7B) can act on a idler pulley 89, in the axis of the spring 77, to tension the belt 82. This axis is here slightly inclined relative to the vertical.

In the variant of Figure 8D, a spring blade 810 is mounted for example on the drive mechanism 87, tending to move and tension the belt 82 (as illustrated by the dotted lines).

According to another variant, shown in FIG. 8E, one of the idle pulleys 873 of the drive assembly is mounted on a moving axis, so as to be able to move (arrow 811) under the action of a spring 812, and tension the belt 82. A link 813 connects the axes of the two idler pulleys 872, 873.

6. shop for winding the canvas

An example of a winding magazine is illustrated in FIG. 9. It has a profile 91, for example made of extruded plastic, extending under the reel 71, and on which the wound web comes to rest. This profile 91 may be carried by a rigid profile 92, for example of aluminum, which may optionally give the desired shape.

7. different positions of the drive and the reel

FIGS. 10A and 10B illustrate two alternative positions of the drive means 101 and the winder 103.

In the embodiment of Figure 10A, the drive means 101 are behind the reel, relative to the direction of unwinding of the fabric. In the embodiment of Figure 10B, however, they are in front of the reel, the latter being pushed towards the rear of the vehicle.

Claims

An occultation device for a motor vehicle, comprising at least one occulting fabric (21) movable between a retracted position and an extended position, characterized in that said fabric (21) carries at least a first series of teeth (25). ) adapted to engage a second series of complementary teeth of a toothed belt (26), driven by actuating means for controlling the movement of said shade cloth.

2. Device for concealment according to claim 1, characterized in that said fabric (21) comprises two first series of teeth (25), mounted and / or formed respectively on each of the lateral edges of said fabric (21), and associated respectively to two toothed belts (26).

3. Device for concealment according to claim 1, characterized in that said first and second series of teeth (25) are held in engagement with each other by means of a rail provided for this purpose.

4. A concealment device according to claim 3, characterized in that said rail and / or at least one rear support (28) is glued to the window of said motor vehicle.

5. Device for concealment according to claim 1, characterized in that it comprises at least one motor (29) driving at least one toothed wheel (210) driving said toothed belt (26).

6. Device for concealment according to claim 1, characterized in that it comprises an axis (23) or a flexible tube, around which said shade cloth (21) is wound in said retracted position.

7. Device for concealment according to claim 1, characterized in that said fabric (21) is elastic.

8. Device for concealment according to claim 1, characterized in that said shade cloth (21) is curved in a direction perpendicular to the direction of deployment of the fabric (21).

9. Device for concealment according to claim 1, characterized in that it comprises means for adjusting the tension and / or tensioning said belt.

10. Motor vehicle, characterized in that it comprises a concealment device according to any one of claims 1 to 9.