EP1062402A2

EP1062402A2 - Cable actuated window lift drive mechanism

Info

Publication number: EP1062402A2
Application number: EP99924662A
Authority: EP
Inventors: Roland Feder; Eberhard Pleiss
Original assignee: Brose Fahrzeugteile SE and Co KG
Current assignee: Brose Fahrzeugteile SE and Co KG
Priority date: 1998-03-17
Filing date: 1999-03-16
Publication date: 2000-12-27
Anticipated expiration: 2019-03-16
Also published as: DE59902342D1; BR9908853A; WO1999047779A3; WO1999047779A2; DE19812875C1; EP1062402B1

Abstract

The invention relates to a cable actuated window lift drive mechanism which can be secured to a sheet metal support. The inventive device comprises a motor shaft which accommodates a cable drum and a gear element, in addition to two bearing covers placed on both sides of the sheet metal support. The aim of the invention is to provide a compact window lift drive mechanism which is easy to assemble and is made up of only a few components with modest tolerance requirements when compared to the degree of manufacturing precision. In order to achieve this task, the motor shaft (9) is integrated into the one of the bearing covers (6a, 6b), the position of the bearing covers (6a, 6b) in relation to each other on the sheet metal support can be fixed with respect to the motor shaft (9) by means of fixtures (8) and the periphery of the cable drum (4) and/or gear element (5) is sealed (10).

Description

Cable winch drive

description

The invention relates to a cable window lifter drive with central fastening and sealing in the carrier plate according to the preamble of claim 1.

Cable window lifters for a window that can be lowered into a window shaft of a vehicle have a guide rail arranged in the direction of movement of the window, along which a sliding element engaging on the lower window edge and connected to a drive cable of the cable window lifter is arranged so as to be displaceable in the longitudinal direction. The drive cable is guided to a drive unit which has a drive housing with a cable drum arranged therein for receiving the drive cable and a driver which engages in an internal toothing of the cable drum and which can be connected to a hand crank or a motor drive.

The drive cable is usually arranged in a Bowden sleeve, which is attached to Bowden supports of the drive housing. The drive cable itself connects to the cylindrical surface of the cable drum and is connected to the cable drum in such a way that when the driver is actuated in one or the other direction of rotation, the drive cable is wound up and down by the cable drum, so that the cable is connected to the disc and on the carrier guided on the guide rail is moved up and down. For documentation of the prior art, FIG. 1 shows an exploded view of a cable window lifter drive with a cable drum and a bearing cover, and FIG. 2 shows a section through a cable window lifter drive that is mounted on a carrier plate of a motor vehicle door.

The drive unit 1 consists of an electric motor 11, a gear 12 and an electronics module 13, which are mounted in a drive housing 2. On the output side, the drive unit 1 has a multi-tooth driver 3, the outer toothing 30 of which engages in the inner toothing 40 of a cable drum 4, which is arranged in a cylindrical recess 60 of a bearing cover 6.

The multi-tooth driver 3 has an external toothing 30 and on its end face facing away from the external toothing 30 three driver pins 31, which ensure the positive locking necessary for the power transmission with a driver gear element, not shown, mounted in the axis of the cable drum, that of one with the axis of the electric motor 11 connected drive worm of the transmission 12 is driven.

The bearing cover 6 has two cable guide channels 64, 65 which open into openings 66, 67, where the window lifter cable inserted into a spiral groove 42 of the cable drum 4 and wound around the cable drum 4 emerges and is connected at the ends of the window regulator rails to the drivers of the window pane is.

To connect the drive housing 2 to the bearing cover 6, the drive housing 2 has fastening elements 21, 22, 23 which are screwed to fastening elements 61, 62, 63 of the bearing cover 6. Figure 2 shows the assembled state of the cable window drive, in which the fastening elements 21, 22, 23 and 61, 62, 63 through an opening a support plate 7 inserted and connected to each other with screws.

The section shown in FIG. 2 through a cable window lifter drive shows that during assembly the drive unit 1 is first centered on the fastening elements (domes) 61 (and not shown 62 and 63) inserted through the carrier plate 7 when the drive housing 2 is plugged onto the bearing cover 6 before the driver toothing 30 engages in the cable drum toothing 40. Then the bearing cap 6 is put on and the connection of the drive unit 1 with the bearing cap 6 or the carrier plate 7 is established, for example, by means of a snap connection or by tightening fastening screws.

Furthermore, DE 43 19 705 C2 discloses a device for fastening a window lift motor, by means of which fastening positions arranged on the circumference of the motor housing are used to fasten the motor to the inner door panel. In order to enable a firm connection between the motor housing and the inner door panel, spacer sleeves are provided between the protrusions of the engine housing and the inner door panel.

This solution requires an increased space requirement, which arises from the design of the domes. In addition, several through openings of the fasteners must be sealed. Furthermore, high demands are placed on the manufacturing accuracy of the hole pattern of the motor fastening, which is associated with high manufacturing costs. Furthermore, several locking or screwing operations have to be carried out, which means increased assembly effort.

The object of the invention is to provide a cable window lifter drive which enables simplified assembly with few components and requires little space at the same time requires low tolerance requirements with regard to manufacturing accuracy.

This object is achieved by a cable window drive with the features of claim 1.

Advantageous embodiments of the invention are specified in the subclaims.

The cable window lifter drive according to the invention requires significantly less space on the carrier plate than conventional drives, since the design of the domes in the bearing caps outside the gear element or the cable drum can be dispensed with. There are also no three screwing operations and three sets of fastening or screw connecting elements, so that an additional material and assembly time saving is achieved.

Since the seal between the wet and dry room is made by means of a seal on the cable drum or on the gear element, no separate seal of the screw connection passages is required. The motor must be correspondingly less moisture-resistant and the previously used moisture-proof (Goretex) membranes and bearing cap seals can be omitted.

Another advantage of the cable window lifter drive according to the invention is the lower tolerance requirements with regard to the production, since only a bore or a recess is to be provided, and thus dependent dimensions, such as those which occur in the conventional configuration through the bores and domes, are eliminated.

In a development of the invention, the motor axis is integrated in the bearing cover on the wet room side, which makes installation easier. The bearing cover on the wet room side together with the motor axis is on the carrier plate pre-assembled, depending on the design of the cable drum and the gear element, one or both components are already attached to the motor axis. The bearing cover on the drying room side is then pushed onto the axle and fixed on the axle using the fastening means. A first centering of the gear element or the cable drum takes place here via the seal which is attached to the carrier plate. Thus, the cable window lifter drive can be mounted on the carrier plate with just one screw or fastening device.

This type of attachment is also very cheap for service operations, since only the inner lining of the door has to be removed in order to access the corresponding component. Most of the services can therefore be carried out on the drying room side, which saves installation and repair time.

An advantageous development consists in securing the bearing cover against rotation, which is preferably designed to be form-fitting. A molded projection of the bearing cover, which is supported on one or more elevations of the carrier plate, prevents the bearing cover from rotating in a simple and effective manner, for example when the window pane is moved against a stop. Furthermore, the clamping forces to be applied are reduced by the anti-rotation device, since without an anti-rotation device, rotation with a frictional connection between the carrier plate and the bearing cover with the correspondingly high clamping forces would have to be prevented.

In addition to projections of the bearing cover, indentations, molded pins or hollows are also possible to prevent rotation, which correspond to the respective elements of the carrier plate. It is expedient to arrange a radial seal between the drying space and the wet space on the carrier plate in order to ensure an effective seal. The seal can be integrally formed on the carrier plate, inserted in corresponding receptacles of the carrier plate or mounted on the carrier plate in another way. The shape of the radial seal is appropriate since both the gear element and the cable drum preferably have round cross sections, so that efficient protection against the ingress of moisture can be ensured by one or more radial seals. The radial seals can consist of known, commercially available radial shaft sealing rings or of plastic or rubber lips molded onto the carrier plate.

In a modification of the sealing arrangement, the radial seal is accommodated in one of the two bearing caps, so that the sealing can take place at the most favorable point in each case. In the case of an arrangement of the seal on the wet room side, the elastic forces of the seal exert a clamping effect on the cable drum or the gear element, which facilitates assembly since the corresponding component is pre-fixed. There are further advantages in terms of production technology, since a bearing cover is easier to handle than a carrier plate and the seal can thus be easily mounted in a bearing cover. As a variant, radial seals are provided in both bearing covers.

In order to save on components and assembly devices, the gear element and the cable drum are advantageously formed in one piece. The one-piece embodiment eliminates the need for a torque-transmitting connection, for example the multi-tooth driver, between the gear element and the cable drum. Only one component is pushed onto the motor axis, so that alignment of The cable drum and gear element are not required during assembly.

For simple and reversible fastening of the bearing caps on the carrier plate and a corresponding alignment to one another, a thread is provided on the motor axis for screwing on the bearing caps.

Embodiments of the invention are explained in more detail with reference to the drawings.

Show it:

Figure 1 - an exploded view of a cable window drive with a multi-tooth driver, a cable drum and a bearing cap;

Figure 2 - a section through a cable window drive, which is mounted on a carrier plate of a motor vehicle door and

Figure 3 - a sectional view of a cable window lifter drive according to the invention.

The sectional illustration shown in FIG. 3 shows a cable window lifter drive which is fastened to a carrier plate 7 and which has an electric motor 11 which drives a gear element 5 via a worm 16 and a worm wheel 17.

In the illustrated embodiment, a cable drum 4 is integrally formed on the gear element 5, so that the cable drum 4 is driven directly via the gear element 5. It is also conceivable and provided as a variant that the gear element 5 is connected to the separately manufactured cable drum 4 via a toothing, for example a multiple toothing, or that an intermediate piece such as the multi-tooth element 3 transmits the force.

The gear element 5 and the cable drum 4 are mounted on a motor shaft 9, which is integrated in the bearing cap 6b, wherein of course the bearing cap 6a can also accommodate the motor shaft 9. The motor axis 9 can be formed by a molding process, e.g. Injection can be permanently connected to one of the bearing covers 6a, 6b by primary or forming processes or by a joining process, for example welding. Pressing or screwing in is also conceivable, provided the accuracy requirements can be met.

At the beginning of the assembly, the motor axis 9 protrudes according to FIG. 3 in a pre-assembly position through an opening 18 in the carrier plate 7 onto the drying room side. In this position, the cable drum 4 and the gear element 5 are pushed onto the motor axis 9 and held in this position by a seal 10 fastened to the carrier plate 7. The surface of the gear element 5 or the cable drum 4 is machined accordingly at the point at which the seal 10 rests, so that no excessive wear occurs.

This preassembled unit comprising the bearing cover 6b, the cable drum 4 and the gear element 5 is pushed from the drying chamber side out of the bearing cover 6a onto the motor axis 9 and then fixed by a fastening means 8, here designed as a nut. The worm 16 with the motor 11 can already be attached to the bearing cover 6a or can only be installed after the mounting of the bearing cover 6a, 6b. By screwing the bearing caps 6a, 6b against each other, a clamping force is generated which fixes the cable window lifter drive on the carrier plate 7. The bearing cover 6a on the dry room side has an anti-rotation device 14, which is in the form of a shape of the support plate 7 and a corresponding receptacle 14. The bearing cover 6a is prevented by the anti-rotation device 14 from rotating about the motor axis 9 due to the reaction forces of the adjustment on the carrier plate 7. As a result, the clamping forces which have to be applied via the fastening means 8 can be reduced accordingly, since only a firm contact of the bearing covers 6a, 6b with the carrier plate 7 has to be ensured. Of course, the anti-rotation device 14 can also be attached to the bearing cover 6b or can be provided in multiple versions. With regard to the design of the anti-rotation lock 14, many variants are possible, the form-fitting definitions of the bearing caps 6a, 6b being advantageous with regard to the manufacturing costs, the simplicity of assembly and the variety of designs.

In a variant of the invention, not shown, the seal 10 is fastened from dry to wet room in one of the bearing caps 6a, 6b. The contact surface of the seal 10, which is preferably designed as a radial seal, is accordingly outside the plane of the carrier plate 7 on one side of the bearing caps 6a, 6b.

As a possible alternative, there is a separate embodiment of the gear element 5 and the cable drum 4, which are connected to one another via a torque-transmitting element. This element can consist, for example, of an interposed multi-tooth driver 3 or an integrally formed toothing on the cable drum 4 and the gear element 5. This also gives the possibility of separately sealing both the cable drum 4 and the gear element 5 in the respective bearing caps 6a, 6b. Optionally, only one seal should be provided. By sealing the gear element 5 or the cable drum 4 via a radial seal 10, which are attached to one of the bearing caps 6a, 6b, in connection with the separate design of the gear element 5 and cable drum 4, there is the possibility of two separate assemblies for the Prepare final assembly so that the two modules only have to be plugged together and screwed together. The insertion into the seals 10, which then exert a holding force on the gear element 5 or the cable drum 4 and hold them in an assembly-ready position, can then be carried out as part of a pre-assembly.

Claims

Reference list

Drive unit

Drive housing

Multi-tooth drivers

Rope drum

Gear element 6a, 6b bearing cover

Carrier sheet

Fasteners

Motor axis

seal

Electric motor

transmission

Electronics module

Anti-rotation device

thread

slug

Worm wheel

Opening, 22, 23 fastener

External teeth

Driver pin

Internal teeth

groove

Recess

Fastening element, 65 cable guide channel, 67 opening Expectations

Cable window lifter drive for attachment to a carrier plate, with a motor axis for receiving a cable drum and a gear element and two bearing caps, which are arranged on both sides of the carrier plate,

characterized,

that the motor axis is integrated in one of the bearing caps (6a, 6b), that the bearing caps (6a, 6b) can be fixed in their position relative to one another on the carrier plate (7) via fastening means (8) on the motor axis (9) and that a seal (10) on the circumference of the cable drum (4) and / or the gear element (5).

Cable window lifter drive according to claim 1, characterized in that the motor axis (9) is integrated in the bearing cover (6b) on the wet room side.

3. Cable window lifter drive according to claim 1 or 2, characterized by an anti-rotation device (14).

Cable window lifter drive according to claim 3, characterized by a positive locking device (14).

Cable window lifter drive according to at least one of the preceding claims, characterized by a Radial seal (10) between the drying room and the wet room on the carrier plate (7).

6. Cable window lifter drive according to claim 5, characterized in that the radial seal (10) is integrally formed on the carrier plate (7).

Cable window lifter drive according to at least one of the preceding claims 1 to 4, characterized in that the seal (10) is fastened as a radial seal (10) in one of the bearing covers (6a, 6b).

8. cable window lifter drive according to at least one of the preceding claims, characterized in that the gear element (5) and the cable drum (4) are integrally formed.

9. Cable window lifter drive according to at least one of the preceding claims, characterized in that the motor axis (9) has a thread (15) for screwing the bearing caps (6a, 6b).