DE20307885U1 - Combined drive unit for at least one unit and a door lock - Google Patents

Description

PATENT ATTORNEYS
EUROPEAN PATENT AND TRADEMARK ATTORNEYS

Attorney file:

96 338/Wi/Nu

Graduate Physicist

DR. WALTER ANDREJEWSKI (-1996)

Graduate engineer

DR.-ING. MANFRED HONKE

Graduate Physicist

DR. KARL GERHARD MASCH

Graduate engineer

DR.-ING. RAINER ALBRECHT

Graduate Physicist

DR. JOERG NUNNENKAMP

Graduate Chemist

DR. MICHAEL ROHMANN

Graduate Physicist

DR. ANDREAS VON DEM BORNE

D 45127 Essen, Theaterplatz 3 D 45002 Essen, P.O. Box IO 02 54

20 May 2003

Utility model application

1) Kiekert Aktiengesellschaft
Kettwiger Strasse 12-24

579 Heiligenhaus

2) IMS Gear GmbH
Heinrich-Hertz-Strasse 16
78166 Donaueschingen

Combined drive unit for at least
an aggregate and a door lock

Andrej ewski, Honke & Sozien, patent attorneys in Essen

Description:

The invention relates to a combined drive unit for at least one unit, e.g. window lifting device, and a door lock in a motor vehicle door, with a common motor for actuating the unit and/or the door lock.

A combined drive unit of the design described above is covered in DE 197 55 942 C2. Here, a reversing clutch is used to optionally couple a drive motor into the drive train of the window lifting mechanism or the drive train of the closing mechanism. The reversing clutch is therefore located in the drive train or is a component of the drive train.

This is achieved in such a way that a drive worm from the drive motor is in engagement with a gearwheel that has output gears on both sides. A switching shaft of an electrically switchable lifting magnet runs coaxially through the interior of a hub of the gearwheel. The switching shaft forms the armature of the lifting magnet and can be moved axially so that either one or the other output gear is actuated. This is complex and not always free of malfunctions because the switching clutch or the armature of the lifting magnet is moved back and forth between the two output strands.

In addition, there are basically change-over transmissions, as they are the subject of DE 101 25 747 Al. Such change-over transmissions are used to transmit the driving force from a

Andrej ewski, Honke & Sozien, patent attorneys in Essen

Adjustment drive via a coupling element to one of two drive elements, each of which is assigned to an adjustment device in motor vehicles. The axes of the adjustment drive and the drive elements are arranged coaxially to one another. The coupling element coupled to the adjustment drive can be moved radially by means of a switching device and can be brought into force- and/or form-fitting engagement with one of the two drive elements.

DE 36 34 020 Cl deals with an adjustment mechanism in a motor vehicle. This may be used for a motorized seat adjustment, a backrest inclination adjustment or a window lifter.

Furthermore, DE 199 44 915 A1 discloses a drive for adjusting devices in motor vehicles, in particular window lifters. This includes a motor and a gear transmission coupled to the motor, which has an internally toothed ring gear as the drive element.
DE 299 24 088 Ul takes a similar approach.

The invention is based on the technical problem of further developing a drive unit of the design described at the outset in such a way that, with a simple and, in particular, cost-effective construction, high functional reliability is also provided.

To solve this technical problem, the invention proposes in a combined drive unit of the embodiment described above that the motor with

Andrej ewski, Honke & Sozi en, patent attorneys in Essen

the door lock and the unit are permanently mechanically coupled via a connecting unit to at least one traction lock, wherein the connecting unit connects respective connecting strands to the unit on the one hand and to the door lock on the other hand with the motor, and wherein the connecting strands are each activated and/or deactivated with the aid of the traction lock.

The connecting line to the unit can be designed to be self-locking. The connecting unit preferably has a gear, in particular a planetary gear, although other embodiments are also conceivable and included. The teaching of the invention naturally allows the possibility of activating both connecting lines simultaneously. Simultaneous deactivation is also possible. For the most part, however, optional operation will be provided.

As a rule, there are at least two brake elements as a traction lock, which block the respective connecting line with a positive and/or non-positive fit. In detail, this may be designed in such a way that the two brake elements are actuated by a common servomotor and alternately lock the respective connecting lines. The servomotor receives the corresponding control commands from a control unit, which implements the respective command, either "operate window lifting device or unit".

In detail, the respective connecting line mainly has at least one moving braking element, which is a brake disc or disk, a cone,

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Andrej ewski, Honke & Sozien, patent attorneys in Essen

a pin, a bushing or the like. This braking element is blocked by a fixed counter-braking element if necessary. The counter-braking element is also a brake disc or disc, a cone, a pin, a bushing etc., which is pressed against the moving braking element of the respective connecting line*, with the help of the previously described servomotor, and thus blocks the respective connecting line.

Because a braking element is provided on the connecting line to the unit or window lifting device, which works together with a fixed or immobile counter-braking element to immobilize the unit when it is not being actuated, the unit or window lifting device can be designed to be self-locking. This results in cost advantages.

The self-locking is usually ensured at this point with the help of special worm gears or similar transmission elements. This is necessary to prevent accidental or violent opening of window panes when the window lift drive is used. The self-locking ensures that when the drive or motor for the window lift device is not used, the window pane can only be moved against the self-locking forces that then have to be overcome. Such requirements are even prescribed.

0 Within the scope of the present invention, such costly measures for the representation of the self-locking

Andrej ewski, Honke & Sozien, patent attorneys in Essen

This is because, when the unit or the window lifting device and thus the motor are at a standstill, this self-locking mechanism uses the traction lock that is already present or the braking elements implemented at this point. These are influenced with the help of the servomotor so that a window pane connected to the window lifting device is blocked as desired. In this case, it would be possible in principle for the motor to act on the door lock because the connecting line leading to it is released. In addition, designs are of course also conceivable in which one or more traction locks ensure that both connecting lines are blocked at the same time.

In the case of alternating operation, one could consider switching off the power to the motor for the period of self-locking achieved with the traction lock, so that unintentional movements of the door lock are excluded.

As a result, a combined drive unit is provided in which a mechanical connection unit with respective connecting strands ensures a continuous mechanical connection from the common motor 5 to the unit on the one hand and to the door lock on the other. In contrast to the teaching according to DE 197 55 942 C2, there is therefore a permanent mechanical connection of both the unit or the window lifting device and the door lock to the common motor.

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Andrej ewski, Honke & Sozien, patent attorneys in Essen

It has also proven to be advantageous that one or more traction locks can automatically provide the required self-locking for the unit or window lifting device. This leads to cost savings. At the same time, the design effort is reduced. This is where the main advantages lie.
In the following, the invention is explained in more detail with reference to a drawing which merely represents an exemplary embodiment; in the drawings:
10

Fig. 1 shows an overview of a combined drive unit according to the invention,

Fig. 2 a section through the planetary gear,
15

Fig. 3 the drive unit with the essential components schematically,

Fig. 4a, 4b different designs of the brake elements

0 ments.

The figures show a combined drive unit for at least one unit 1, in the exemplary embodiment a window lifting device 1, and a door lock 2 in a motor vehicle door (not shown). In the exemplary embodiment, this combined drive unit additionally has a connecting unit 4 with at least one traction lock 5 for selectively actuating the unit 1 or the door lock 2 from a common motor 3. In the illustration, the connecting unit 4 forms, together with the traction lock

Andrej ewski, Honke & Sozien, patent attorneys in Essen

5 essentially a switching device 4, 5, which, however, is not mandatory.

In the context of the invention, this switching device 4, 5 is the mechanical connection unit 4, the two outputs 7, 8 of which can be selectively actuated using the traction lock 5 (see Fig. 3). In fact, the switching device 4, 5 permanently mechanically couples the unit 1 and the door lock 2 to the motor 3. The motor 3 is coupled to the unit 1 with the mechanical connection unit 4 interposed in connection with the traction lock 5 via a connecting line 6, 7, 9. In contrast, the door lock 2 is connected to the motor 3 via a connecting line 6, 8, 10 with the connection unit 4 interposed.

Both connecting strands 6, 7, 9 on the one hand and 6, 8, 10 on the other hand originate from the mechanical connecting unit 4 or are combined in the mechanical connecting unit 4, so that the common motor 3 can work on the two connecting strands 6, 7, 9 on the one hand and 6, 8, 10 on the other. Whether the door lock 2 or the unit 1 is driven by the common motor 3 is decided based on the position of the traction lock 5, as will be explained in more detail below.

In the context of the exemplary embodiment, the connecting unit 4 is designed as a planetary gear 4. This planetary gear 4 has a sun gear with sun gear shaft 6, a planet gear carrier with planet gear carrier shaft or.

Andrej ewski, Honke & Sozien, patent attorneys in Essen

Carrier shaft 7 and a ring gear 8, as the sectional view in Fig. 2 immediately makes clear.

The common motor 3 operates on the sun gear shaft 6. The hollow gear 8 is connected to a worm shaft 10, which rotates a worm gear 11 clockwise or counterclockwise, as indicated in Fig. 1 by a double arrow. This allows a rotary latch connected to the worm gear 11 to be moved, so that the associated door lock 2 closes the vehicle door. It is also possible for the worm gear 11 to be connected to a pawl for the rotary latch, so that this pawl can be lifted out for electrical opening, as described in detail at the beginning. Of course, other functions of the door lock 2 can also be implemented with the help of the worm gear 11, for example a child safety lock or an anti-theft device.

0 The planetary gear carrier or the planetary gear carrier shaft or web shaft 7 is connected to a further worm 9, which causes a cable drum 12 of the window lifting device 1 to rotate. The unit 1 is therefore designed as a window lifting device 1 in the exemplary embodiment.

5 rotations of the associated cable drum 12 are directly converted into lifting and lowering movements of a window pane (not shown) via a cable wound on the cable drum 12.

0 It can be seen that the carrier shaft 7 is arranged in axial extension of the sun gear shaft 6 and the worm 10 for

Andrej ewski, Honke & Sozien, patent attorneys in Essen

penetrates the worm wheel 11 as well as the traction lock 5. In contrast, the ring gear 8 works on the worm 10 via a hollow shaft 8' which accommodates the web shaft 7 in its interior. In principle, the two worms 9, 10 and the common motor 3 can also be connected to rotating elements 6, 7 and 8 of the connecting unit 4 other than those shown.

In the context of the exemplary embodiment, however, the common motor 3 works on the sun gear shaft 6, which, when the ring gear 8 is held in place, causes the planet gear carrier and consequently the carrier shaft 7 to rotate. This also causes the worm 9 and consequently the cable drum 12 to rotate, so that the window lifter or the window lifting device 1 or the unit 1 performs the required movements. This is the normal case. In this functional position, the traction lock 5 consequently blocks the ring gear 8 or the ring gear shaft 8 ¹ connected to it.

This is done in detail in such a way that four braking elements 14, 15, 16, 17 are provided, which positively and/or force-lock the respective connecting strand 6,

7, 9 or 6, 8, 10. The two braking elements or counter-braking elements 16, 17 can be acted upon by a common servomotor 13 and can be connected in an alternately blocking manner to the respective connecting line 6, 7, 9 or 6, 8, 10 or the co-moving braking elements 14, 15.

0 In fact, each connecting strand 6, 7, 9 and 6,

8, 10 via an associated braking element 14, 15 which

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Andrej ewski, Honke & Sozien, patent attorneys in Essen

is moved. In the embodiment according to Fig. 1, the braking element 14, 15 is a brake disk, wherein the brake disk 14 is coupled to the connecting line 6, 8, 10, while the brake disk 15 is connected to the connecting line 6, 7, 9.

In addition to brake disks 14, 15 or counter brake disks 16, 17 according to Fig. 1, interlocking cones can also be used as brake elements 14, 15, 16, 17 according to Fig. 4a. Corresponding pins and bushings are just as conceivable, which are shown in Fig. 4b and represent positively acting brake elements 14, 15, 16, 17. In fact, when a bushing is axially loaded, a brake pin as a brake element 14 dips into it as a counter brake element 16 and is thereby fixed. The brake pin is mounted in a retaining bushing so that it can rotate about its axis against spring force, so that the two brake elements 14, 16 are synchronized with one another when they engage. The same applies to brake elements 15, 17 which are arranged in mirror image and have the same structure but are not shown.

The counter-brake elements 16, 17 are assigned to both brake elements or brake disks 14, 15 according to Fig. 1. The two counter-brake elements 16, 17 together with a receptacle 18 for a pivot lever 19 form a brake body 16, 17, 18. The counter-brake elements 16, 17 are arranged concentrically to a continuous drive axis, namely the connecting line 6, 7, 9. The same applies to the brake elements 14, 15.

Andrej ewski, Honke & Sozien, patent attorneys in Essen

The pivot lever 19 can be pivoted via a worm 20 with the aid of the servo motor 13 into the positions indicated by the dash-dotted lines. This causes the brake body 16, 17, 18 to be adjusted linearly in relation to the drive axle or to the respective connecting strands 6, 7, 9 and 6, 8, 10, as indicated by a double arrow in Fig. 1. In the left stop position, in which the counter-brake element 16 blocks the brake element 14, the ring gear 8 of the planetary gear 4 is consequently fixed so that the worm gear 11 cannot move. This is the normal position in which the common motor 3 only acts on the cable drum 12 for the window lifting device 1 via the connecting strand 6, 7, 9.

However, if the servomotor 13 receives a signal from a control system (not shown) that the door lock 2 is to be opened or closed electrically, the servomotor 13 moves the brake body 16, 17, 18 to the right stop position so that the counter-brake element 17 engages with the brake element 15 and the connection of the counter-brake element 16 to the brake element 14 is released. Consequently, when the common motor 3 or the sun gear shaft 6 driven by it rotates, the ring gear 8 can now move freely, whereas the planet gear carrier and with it the carrier shaft 7 are blocked. As a result, the cable drum 12 is fixed, but the worm disk 11 can rotate, both clockwise and counterclockwise - depending on the direction of rotation of the motor 3 or the sun gear shaft 6.

Andrej ewski, Honke & Sozien, patent attorneys in Essen

The cable drum 12 is driven by the common motor 3 with gear ratios of approximately 1:60 to 1:80 in order to be able to provide the necessary actuating forces for a connected window pane. In contrast, the worm disk 11 has gear ratios of 1:50 to 1:70 in order to be able to open or close the window electrically.

It is particularly important that the connecting strand 6, 7, 9 to the unit 1 or the window lifting device 1 is designed to be non-self-locking. This means that no specially designed worm 9 or transmission elements to the cable drum 12 are used at this point, which have an inhibiting effect. Rather, the braking element 15 and the counter-braking element 17 ensure that when the window lifting device 1 is stationary, the cable drum 12 and consequently the unit 1 and thus the connecting strand 6, 7, 9 are blocked. This happens within the scope of the exemplary embodiment in which, when the window lifting device 1 is stationary, the servomotor 13 ensures that the counter-braking element 17 is applied to the braking element 15. In this context or in this functional position, a control unit or control system (not expressly shown) ensures that the motor 3 is de-energized and that the door lock 2 is not accidentally actuated.

The control system can distinguish this self-locking state from the functional position in which the door lock 2 is to be actuated by the motor 3. In this case, a mostly triggered operating lever on the door lock 2 or the vehicle door ensures that the command

Andrejewski, Honke & Sozien, patent attorneys in Essen

"Activate door lock 2" or "electrically open" or "electrically close" etc. is detected. If this command is not given or the operating lever is not actuated, the motor 3 remains in its de-energized state during the self-locking described.

Claims (6)

1. Combined drive unit for at least one aggregate ( 1 ), e.g. B. Window lifting device ( 1 ), and a door lock ( 2 ) in a motor vehicle door, with a common motor ( 3 ) for acting on the unit ( 1 ) and / or the door lock ( 2 ), characterized in that the motor ( 3 ) is permanently mechanically coupled to the door lock ( 2 ) and the unit ( 1 ) via a connecting unit ( 4 ) with at least one traction lock ( 5 ), wherein the connecting unit ( 4 ) connects respective connecting strands ( 6 , 7 , 9 ; 6 , 8 , 10 ) on the one hand to the unit ( 1 ) and on the other hand to the door lock ( 2 ) with the motor ( 3 ), and wherein the connecting strands ( 6 , 7 , 9 ; 6 , 8 , 10 ) are each activated and / or deactivated with the aid of the traction lock ( 5 ). 2. Drive unit according to claim 1, characterized in that the connecting strand ( 6 , 7 , 9 ) to the unit ( 1 ) is designed to be self-locking. 3. Drive unit according to claim 1 or 2, characterized in that at least two brake elements ( 14 , 16 ; 15 , 17 ) are provided as a traction lock ( 5 ), wherein the two brake elements ( 14 , 16 ; 15 , 17 ) block the respective connecting strand ( 6 , 7 , 9 ; 6 , 8 , 10 ) in a force-fitting manner. 4. Drive unit according to one of claims 1 to 3, characterized in that both braking elements ( 14 , 16 ; 15 , 17 ) are acted upon by a common servomotor ( 13 ) and alternately block the respective connecting strands ( 6 , 7 , 9 ; 6 , 8 , 10 ). 5. Drive unit according to one of claims 1 to 4, characterized in that the respective connecting strand ( 6 , 7 , 9 ; 6 , 8 , 10 ) has at least one co-moving braking element ( 14 , 15 ) which is blocked by a fixed counter-braking element ( 16 , 17 ) if necessary. 6. Drive unit according to one of claims 1 to 5, characterized in that discs, cones, pins and bushings etc. which engage with one another in a form-fitting and/or force-fitting manner are used as braking elements ( 14 , 16 ; 15 , 17 ).