EP1514989A2 - Drive unit and motor gear unit for cable window regulator - Google Patents

Abstract

The window drive system has an electric motor with a worm engaging the teeth (11) of a worm wheel (10). The wheel has a central aperture (16) for a support shaft and apertures (13,14) accommodating drive claws (19,20) on a worm wheel (17). The wheel has a flange (23), a ribbed drum (18) and a curved portion (28) leading to a channel (27) with an end chamber (26) to accommodate the enlarged end of the window winding cable. The diameter of the drum may be between 22 and 30 mm and the worm gear reduction ratio may be between 1:38 and 1:51.

Description

The present invention relates to a transmission unit and a motor-gear unit for rope windows of motor vehicles.

The manifold requirements for motor gear units for rope windows in Motor vehicles require in practice relatively narrow parameter ranges with regard to their constructive design. In the structural design, in particular the the following conditions are adequately considered: the output power of the used for electric drive electric motor; the available Onboard voltage of motor vehicles, which has an influence on the maximum power output Has; the frictional forces caused by the structural design of the windows, which specify the required minimum output power; the constructive interpretation both for windows of motor vehicle front doors as well as for windows of Motor vehicle rear doors; the required maximum stroke for adjusting the window; the Expected maximum number of operations of the window during the operating time of the motor vehicle; the optional design for both manual and electrical Drive of the window regulator; the flexural strength and durability of the rope used. In practice, a large number of other boundary conditions must be taken into account.

In practice, these requirements have led to window lift drives Worm gear reduction always a reduction ratio in the range of about 1:62 to about 1:84, the rope drums have a diameter in the range of about 36 mm about 48 mm and the power output of the electric motors is about 20W. Deviations from these relatively narrow parameter ranges are very common in practice difficult, because it applies to any modification, a variety of constraints to optimize, as stated above.

Some of the above and other parameters are virtually unchangeable because you would encounter serious technical problems. For example, there is one possible reduction of the diameter of the cable drum counteracts the disadvantages that The rope wound up relatively high on the rope drum, which in the rope guide and also The structural design of rope window regulators poses great problems, and that the rope is much more bent, which is at the expense of the durability of the rope, yes on the entire operating period of the motor vehicle should be guaranteed.

The automotive industry today demands increasingly standardized Supply components that are used universally. This reduces the effort in the Construction, warehousing and assembly. In particular, the fact that out of this Reason electric cable windows for both the front door and the rear door today uniform with electric motors with a possible output power of 20 W. be equipped, but has the disadvantage that in the rear door a too large Construction volume must be held, which is not actually required. Because the Rear windows are usually additionally led twice in the door and with them becomes the driving force usually initiated at one point, so that friction or Verkippprobleme are of minor importance. For reasons of space and also out Cost reasons, it would therefore be desirable to use electric cable windows Electric motors of lower power output to equip. But that's what the comparatively high requirements for the adjustment of a front window, In particular, relatively complex window guides with a poorer mechanical Efficiency and the like.

With all this, it should be borne in mind that even the smallest improvements in the design of gear or motor gear units for rope windows in today's Cost pressure in the automotive supply industry of considerable economic Meaning are.

Fig. 8 shows a sectional view of a transmission unit according to the prior art for electric rope windows. Shown is only the gear housing section. 6 the gear unit in which a worm wheel 10 of a worm gear is included. Through a cylindrical hole on the right edge of the Transmission housing section 6 extends a motor shaft (not shown), to whose front end of a drive screw 15 is seated, the teeth in the teeth 11 of the Scheckenrads 10 engages. The reduction ratio of the thus formed Worm gear is in the art for the reasons mentioned above in the field from about 1:62 to about 1:84.

On the upper end of the gear housing section 6 sits an output driver 40, which has at its upper end a conical serration 41, to which a Cable drum (not shown) with an internal toothing rotatably mounted. The Worm wheel 10 is formed as a hollow body, in which at angular intervals mutually retaining ribs (not shown) are arranged. In the holding ribs, the under corresponding angular intervals spaced from each other rubber damping elements 39 to the driver 40 rotatably with the worm wheel 10 to connect. The output driver 40 and the worm wheel 10 are rotatable together mounted around the pivot 9. The output driver 40 and the worm wheel 10 are in the axial direction verschiebegesichert by the locking ring 35. The rope drum (not shown) is used for winding and unwinding the rope of a rope window regulator in the known way.

On the gear housing section 6 sits an upper housing cover 32, wherein a Seal 30 with sealing lips 31 in the annular gap between the inner peripheral wall of the upper housing cover 32 and the outer peripheral edge at the upper end of the Scheckenrads 10 sits to the worm wheel 10 and the output driver 40 against the Seal gear housing section 6.

The relatively high power output of the electric motor of 20 W according to the state of Technology and a correspondingly high torque make a certain damping in the illustrated conventional motor-gear unit mandatory. Of the multi-piece construction of the drive train, comprising the output driver, with the Mitnehmer connected deformable rubber damping elements, which are positively in engage corresponding retaining ribs in the inner circumference of the worm wheel, and the Worm wheel, is relatively complex and expensive.

Object of the present invention, it should be a universal for rope windows Both the rear and the front vehicle doors usable transmission or To provide motor-gear unit, which is even simpler and still can be produced more cheaply.

This object is achieved by a transmission unit according to claim 1 and by a Motor-gear unit according to claim 14. Further advantageous embodiments are Subject of the dependent claims.

According to the present invention, a transmission unit for cable window of Motor vehicles provided a drive and one with the drive comprising cooperating gear, which with a rotatably mounted cable drum for winding and unwinding a rope of the cable window lifter is coupled. The Transmission unit according to the invention is characterized in that a diameter of the Cord drum is in a range of about 22 mm to about 30 mm, and more preferably in a range of about 24 mm to about 28 mm, wherein the reduction ratio of the transmission is in a range of about 1:38 to about 1:55 and more preferably in one Range from about 1:42 to about 1:51.

By the surprisingly simple measure, according to the invention the diameter of Drum drum significantly smaller interpretable than conventional transmission units and at the same time changing the reduction ratio of the transmission accordingly, it will According to the invention possible, for rear cable windows smaller and less powerful Drive motors, in particular with a maximum power output of only about 10 W and a maximum drive torque of only about 6.0 Nm to use. It has It turns out that this constructive modification is crucial for the Gear unit according to the invention for both electric and manual cable windows can be used.

Extensive investigations at the applicant have shown that contrary to Prejudice that such a small cable drum diameter to an unacceptably high Cable load and thus to a rope break or the like even before the end of the usual Operating life of motor vehicles leads, the maximum rope load in the sufficiently lower power to use according to the invention is, so that the rope is durable until the end of the usual operating period of motor vehicles is.

In particular, it has been found that the rear windows of motor vehicles are not so often are used and also often the maximum stroke for rear windows is smaller as the front window. Therefore, for rear rope windows contrary to the aforementioned prejudice yet smaller pulley diameter can be used and / or is the axial length of the cable drum despite their smaller diameter yet sufficiently, without the rope winds too high on the rope drum.

At the same time, the gear unit according to the invention also for front cable windows be used. Because of the invention significantly smaller Cable drum diameter is also sufficient for front cable windows Lever available to the window even with a weaker electric motor sufficient drive torque to adjust. Thus can also for front rope windows ensure a sufficient durability of the rope.

According to the invention, the reduction ratio of the transmission, in particular the Worm gear, in the same ratio as the cable drum diameter opposite reduced in the prior art. It is advantageous that so the cable force rope speed characteristic a rope window lifter according to the invention in Substantially corresponds to a conventional cable window lifter.

The invention has become possible significantly lower output torque of Electric motor and its lower power output make it possible according to the invention, that the cable drum preferably also directly with the transmission, in particular with a Worm gear of the transmission, can be coupled. Thus, according to the invention on the Use of additional damping elements for damping between the drive shaft and the output shaft can be omitted, as they are required in the state. Consequently the surprisingly simple constructive modification according to the invention has the additional Advantage that the transmission unit can be designed less expensive, which According to the invention both in construction and during assembly to a leads to considerable cost savings.

According to the invention, the cable drum is at least two on its front side arranged engagement elements, the form-fitting in corresponding to this formed at least two counter-elements on a front side of the worm wheel engage, coupled with the worm wheel. Preferably, the engagement elements are as Projections, for example as claws, formed in correspondingly formed Intervene recordings.

Because according to the invention coupled to the worm gear output driver not is more required, the transmission housing portion of the invention Gear unit also be sealed much easier. For this purpose sits a Sealant rotationally preferably either on an outer peripheral edge of the worm wheel or on an upper edge of the gear housing section.

This feature allows a considerable compared to the prior art changed production and assembly process. So can the sealant in a Operation in conjunction with other sealing means, such as seals of the electronics housing section, for sealing an electric motor against the housing and the like, are formed. In particular, a two-component injection molding can also be used for this purpose (2K injection molding) are used in which after Solidification of the first component, for example, the relatively hard case in the tool increases the cavity and then the second component, for example, the relatively soft Sealant, be sprayed with a second injection unit. Furthermore, the Worm wheel through the already molded sealant into the Gear housing section are pushed in, while according to the prior art (see Fig. 8), the sealant together with the upper housing cover later can be placed on the worm wheel. Thus, several operations can be saved.

Because the cable drum according to the invention is directly coupled to the worm wheel, engages positively in particular in an end face of the worm wheel, the Window according to the invention optionally for a manual or an electric Drive are designed without requiring further structural modifications would. In particular, an identical cable drum, an identical base plate (for Attachment of the transmission or engine-gear unit, for example, at one Guide rail of the rope window lifter) and an identical bearing cap for both manual as well as used for electric rope power windows.

To accommodate a brake or wrap spring for a manual cable window can the one engagement element, in particular a claw, has a projection around one To form a receptacle for receiving the brake or wrap spring.

In accordance with another aspect of the present invention, a motor-gear unit is also disclosed provided for cable power windows of motor vehicles. This one stands out According to the invention, characterized in that an electric motor is coupled to the gear unit, having a maximum torque of about 5.7 Nm and / or a power output of about 10 W at the maximum.

According to the invention, such a motor-gear unit for both a cable window for a front motor vehicle door as well as a cable window for a rear motor vehicle door to be used.

Because the electric motor according to the invention a significantly lower maximum torque may have, the outer dimensions of a motor-gear unit according to the invention be significantly smaller. That in a vehicle door or in the door too integrating door module ready to be held construction volume can according to the invention by about 40% or even reduced by 50%. Overall, this leads to a further significant Cost savings compared to the prior art.

Fig. 1

in einer Schnittansicht eine Getriebeeinheit gemäß der vorliegenden Erfindung darstellt;

Fig. 2

in einem schematischen Schnitt den Eingriff eines Schneckenrades und einer Seiltrommel gemäß der vorliegenden Erfindung darstellt;

Fig. 3

in einer perspektivischen Explosionsansicht das Schneckenrad und die Seiltrommel gemäß der Fig. 2 darstellt;

Fig. 4

in einer Schnittansicht eine Getriebeeinheit gemäß einer zweiten Ausführungsform der vorliegenden Erfindung darstellt;

Fig. 5

in einem perspektivischen Teilschnitt eine Motor-Getriebeeinheit gemäß der Fig. 4 darstellt;

Fig. 6a und 6b

in einer perspektivischen Ansicht einen elektrischen Seil-Fensterheber gemäß der vorliegenden Erfindung in zwei verschiedenen Phasen seiner Montage darstellen;

Fig. 7a und 7b

in einer perspektivischen Ansicht einen manuellen Seil-Fensterheber gemäß der vorliegenden Erfindung in zwei verschiedenen Phasen seiner Montage darstellen; und

Fig. 8

in einer Schnittansicht eine Getriebeeinheit gemäß dem Stand der Technik für einen elektrischen Seil-Fensterheber.

The invention will now be described by way of example and with reference to the accompanying drawings, from which further features, advantages and objects to be achieved will result and in which:

Fig. 1

in a sectional view illustrates a transmission unit according to the present invention;

Fig. 2

in a schematic section illustrating the engagement of a worm wheel and a cable drum according to the present invention;

Fig. 3

in an exploded perspective view of the worm wheel and the cable drum shown in FIG 2;

Fig. 4

in a sectional view illustrates a transmission unit according to a second embodiment of the present invention;

Fig. 5

in a perspective partial section, a motor-gear unit according to FIG. 4 represents;

Fig. 6a and 6b

in a perspective view represent an electric cable window according to the present invention in two different phases of its assembly;

Fig. 7a and 7b

in a perspective view represent a manual cable window according to the present invention in two different phases of its assembly; and

Fig. 8

in a sectional view of a transmission unit according to the prior art for an electric cable window.

In the figures, identical reference numerals designate identical or substantially the same acting elements or element groups.

Fig. 1 shows a sectional view of a transmission unit according to the present invention Invention. 1, the worm wheel 10 is in the of a housing bottom. 7 and perpendicular to the housing bottom 7 extending side walls 8 formed Gear housing section 6 was added. From the housing bottom 7 protrudes a pivot 9th from perpendicular, which may be formed as a metal or plastic pin and rigid with the Caseback 7 is connected. The pivot pin 9 serves as a rotation axis for the worm wheel 10 and a cable drum according to FIG. 3. Through a cylindrical bore on the left Edge of the gear housing section 6 extends a motor shaft of an electric motor, which has at its front end a drive worm 15 which is connected to the worm wheel 10 combs. The worm wheel 10 and the drive worm 15 form a Worm gear whose reduction ratio by the teeth of the Drive worm 15 and the teeth 11 of the worm wheel 10 is predetermined.

According to the present invention, the reduction ratio of Worm gear in the range of about 1:38 to about 1:55, more preferably in the Range from about 1:42 to about 1:51 and is more preferably about 1:47. The Reduction ratio according to the present invention differs significantly from the conventional reduction ratio for rope windows, which in the range of about 1:62 to about 1:84 lies.

Above the toothing 11, the worm wheel 10 has a substantially smooth-walled peripheral edge, which an upper edge 29 of the side wall. 8 is opposite. The upper peripheral edge of the worm wheel 10 is of a in the Substantially C-shaped seal frictionally engaged, so that the seal 30 in essentially rotationally fixed on the worm wheel 10 sits. One between the top Circumferential wall of the worm wheel 10 and the upper edge 29 of the side wall 8 formed Annular gap is formed by two hook-shaped protruding from the seal 30 sealing lips 31st bridged, which bear against the inner peripheral wall of the upper edge 29 of the side wall 8. Thus, the worm wheel 10 is sealed against the gear housing portion 6. to Assembly, the worm wheel 10 together with the seal 30 on the pivot put on and inserted into the gear housing section 6.

1 is on the lower end face of the worm wheel 10, a torus 36th formed on which the worm wheel 10 is supported in the gear housing section 6, for the reduction of frictional forces. Alternatively, a corresponding annular bead also be formed on the lower end face of the worm wheel 10. The upper end of the Worm wheel 10 is substantially planar and has two receptacles 13, 14th on, for the rotationally fixed coupling of a cable drum (Fig. 2) with the worm wheel 10 serve as described below with reference to FIGS. 2 and 3.

Fig. 2 shows in a schematic section the engagement of a worm wheel and a Cable drum according to the present invention. According to FIG. 2, the cable drum 17 on its lower end face two jaws 19, 20 which are axially from the lower end side protrude and extend annularly in the circumferential direction. According to FIG. 2, the Claws 19, 20 substantially free of play in the corresponding to these trained Receivers 13, 14 on the upper end face of the worm wheel 10, so that the Cable drum 17 engages positively in the worm wheel 10.

1 protrudes in the illustrated intended position of the worm wheel 10 a conical shoulder 37 of the pivot 9 from the top of the Worm wheel 10 level formed out. The conical section 37 is the exact one Positioning the cable drum 17 in the axial direction. As shown in Fig. 2, in the illustrated intended position of the cable drum 17 when the claws 19, 20 completely in the pictures 13, 14 are taken up and the conically widening Section of the passage opening 21 of the cable drum 17 on the conical shoulder 37th of the pivot 9 abuts, a comparatively narrow gap in the axial direction between the upper end face of the worm wheel 10 and the lower end face of the cable drum 17th trained, which can serve to compensate for any manufacturing tolerances.

2 is at the peripheral edge of the lower end face of the cable drum 17 a radially projecting circumferential projection 23 formed in the intended position the cable drum 17 rests against or against the inner circumferential edge of the seal 30 (FIG. 1) slightly covered and so sealing the worm wheel 10 against the Transmission housing section 6 completed.

As shown in FIG. 2, according to the invention the cable drum 17 engages by means of the claws 19, 20 directly into the worm wheel 10 a. According to the invention are thus no additional Damping elements, such as deformable rubber blocks, necessary to the To dampen the drive torque of an electric motor. This simpler and cheaper Embodiment is the direct result of the fact that according to the invention due to the clear smaller reduction ratio of the worm gear and the same extent compared to the known prior art smaller diameter of the cable drum 17 the maximum drive torque of an electric motor according to the invention significantly smaller can be chosen.

Fig. 3 shows in a perspective exploded view of the worm wheel and the Cable drum according to FIG. 2. As shown in FIG. 3, the two receptacles 13, 14 on diametrically opposite sides of the passage opening 16. Each the receptacles 13, 14 is made of two concentric with the passage opening Circumferential walls and two of these interconnecting, in the radial direction formed extending side walls. According to FIG. 3, the profile of the two deviates Receivers 13, 14 and the claws 19, 20 corresponding to these from each other, so that the angular position of the cable drum 17 relative to the Worm wheel 10 is clearly specified. As the skilled person readily apparent be, can also any other locking or locking elements for rotatable connection of the cable drum 17 can be used with the worm wheel 10.

On the outer circumference of the cable drum 17 spiral guide grooves 18, in which the rope of a rope window lifter (Fig. 7) is guided. On the upper front side 25 the cable drum 17 is a substantially tangentially extending Seilnippelaufnahme 26 adapted to the cable nipple of the rope of the rope window regulator take. The Seilnippelaufnahme 26 opens into a cable feedthrough 27 and in the Deflection region 28, where the rope is deflected into the top guide groove 18. A corresponding Seilnippelaufnahme is on the lower end face of the cable drum 17th designed to receive the other end of the rope window rope.

As shown in FIG. 3, the claw 20 has a nose in the axial direction Projection 24, so that, as shown in Fig. 7a, in the case of use for a manual cable window lift a receptacle for receiving the inwardly bent end 58 of the snare or brake spring 57 of the manual cable window lifter 100 (Fig. 7a) for Available.

According to the outer diameter of the cable drum 17 is significantly smaller than at conventional cable drums for electric rope windows. According to the invention is the Diameter of the cable drum 17 in a range of about 22 mm to about 30 mm, more preferably in a range of about 24 mm to about 28 mm and this is still more preferably about 26 mm. According to the invention, the illustrated gear unit for both a manual as well as an electric rope window lift for both front and rear also be used for rear doors of motor vehicles.

4 shows a sectional view of a transmission unit according to a second Embodiment of the present invention. As shown in Fig. 4, embraces according to the second embodiment, the ring seal 30, the upper edge 29 of the side wall eighth of the gear housing section 6. From the seal 30 projects an upper sealing lip 31 radially inwardly and protrudes a lower sealing lip 31 in a substantially hook-shaped manner radially inwardly from. The seal 30 is frictionally engaged and rotationally fixed on the upper edge 29. In the shown intended position of the worm wheel 10 are the sealing lips 31st at the upper peripheral edge of the worm wheel 10 to the worm wheel 10 against the Seal gear housing section 6. For mounting, first the seal 30 the upper edge 29 is placed or formed there. Subsequently, the Worm wheel 10 is placed on the pivot pin 9 and in the gear housing section. 6 inserted through the seal 30 therethrough.

Preferably, the gear unit is in a two-component injection molding produced. Here, first, the housing with a first relatively rigid component in sprayed a tool, then the cavity of the tool enlarged and a second injected relatively soft component with a second injection unit to all Seals (for example, for sealing a slide-in electronics and a Electric motor (see Fig. 6b) and for sealing the worm wheel) in one operation to spray on the housing.

5 shows a perspective partial section of a motor gear unit for cable windows as shown in FIG. 5, is the Transmission housing section 6 at the front end of the housing 2, a Motor housing section 3 for attachment of an electric motor (Fig. 6a) and for receiving the motor shaft 14 has. On the housing 2 are a plurality of mounting portions 4 for Attachment of the motor gear unit 1 provided on a vehicle door. By a Insertion opening 5 are laterally carbon brushes and the electric motor controlling Insertion electronics inserted into the housing 2, so that the carbon brushes on the Commutator rest on the motor shaft 14. At the front end of the motor shaft 14 sits a drive screw (not shown) which meshes with the worm wheel 10.

Due to the considerably smaller diameter in comparison to the prior art Cable drum and the correspondingly smaller chosen reduction ratio of the Worm gear can according to the invention electric motors with significantly lower maximum drive torque and lower power output. Overall, the motor gear unit 1 is characterized by a significantly lower Construction volume, so that in a vehicle door or in one of this to be included Door module according to the invention a significantly smaller volume for holding the Motor gear unit of a cable window lifter must be kept.

6a and 6b show a perspective view of an inventive electric cable windows in two different phases of its assembly. The rope window regulator 100 comprises the circumferentially guided cable 53, which at the deflection 55 is deflected by means of guide rollers 56 and the ends in the upper Seilnippelaufnahme 26 and the lower Seilnippelaufnahme the cable drum 17th are included. For fastening the motor gear unit 1 to the guide rail 54th and / or a door module and / or a door, the base plate 52 is used for mounting First, as shown in Fig. 6a, the cable drum 17 on a pivot of the Base plate 52 inserted and the two cable nipples of the rope 53 in the Seilnippelaufnahmen hooked. Subsequently, as shown in Fig. 6b, the motor gear unit 1 with mounted on the housing 2 electric motor 50 so mounted on the base plate 52, that the claws 19, 20 of the cable drum 17 in the corresponding receptacles of the Engage worm wheel. Subsequently, the motor gear unit with the base plate 52 connected.

FIGS. 7a and 7b show in a perspective view a manual cable window lifter according to the present invention in two different phases of its Assembly. According to the invention, the cable window lifter 100 is preconfigured identically. According to the invention, a base plate 52, which is identical to the base plate of the in Figs. 6a and 6b electric cable window lifter is used. According to FIG. 7 a, the cable drum 17 is attached to a pivot of the base plate 52 and are the Cable nipple of the cable 53 into the associated cable nipple receptacles of the cable drum 17 hooked. As can be seen from Fig. 7a, the claw 20 of the cable drum 17 a nose 24, so that a receptacle for receiving the inwardly bent end 58 of the looping or braking spring 57 shown in FIG. 7a is available. On the Cable drum 17, as shown in Fig. 7b, a cylindrically shaped housing or a brake pot 61 fitted with a plate 62, in which the crank pin 59 of a engages manual window lift. The crank pin 59 carries at its front end a Gearing 60. The wrap or brake spring 57 is hooked in the known manner.

(1) Die Getriebeeinheit kann wahlweise für einen manuellen oder elektrischen Antrieb von Seil-Fensterhebern verwendet werden.

(2) Die Motorgetriebeeinheit kann wahlweise für vordere oder hintere Fenster von Kraftfahrzeugen verwendet werden.

(3) Die Seiltrommel, die Grundplatte und der Getriebegehäuseabschnitt können identisch ausgebildet sein.

(4) Es können Elektromotoren mit deutlich niedrigerem maximalen Antriebsmoment eingesetzt werden.

(5) Dämpfungselemente in dem Getriebegehäuse, beispielsweise zwischen dem Schneckenrad und der Seiltrommel, können entfallen; ein konische Kerbverzahnung an der Seiltrommel zur Verbindung mit dem Schneckenrad oder Dämpfungselemente tragenden Bauelement ist nicht erforderlich.

(6) Das Bauvolumen einer Motorgetriebeeinheit gemäß der vorliegenden Erfindung ist deutlich kleiner.

(7) Sämtliche Dichtungen können an dem Getriebegehäuse mittels Zwei-Komponenten-Spritzgießens in einem Arbeitsgang angeformt werden.

(8) Ein zusätzlicher Lagerdeckel zum Abdecken des in dem Getriebegehäuseabschnitt aufgenommenen Schneckenrads kann entfallen.

In summary, the following advantages can thus be achieved in accordance with the invention:

(1) The gear unit can optionally be used for manual or electric driving of rope window regulators.

(2) The engine gear unit can be optionally used for front or rear windows of automobiles.

(3) The cable drum, the base plate and the gear housing portion may be formed identically.

(4) Electric motors with significantly lower maximum drive torque can be used.

(5) damping elements in the gear housing, for example between the worm wheel and the cable drum, can be omitted; a conical serration on the cable drum for connection to the worm wheel or damping elements bearing component is not required.

(6) The construction volume of a motor gear unit according to the present invention is significantly smaller.

(7) All gaskets can be formed on the gearbox by two-component injection molding in one operation.

(8) An additional bearing cap for covering the worm wheel received in the gear housing portion may be omitted.

As those skilled in the study of the above description readily apparent can be made numerous variations and modifications without from the solution idea and the scope of the present invention, as he is determined by the appended claims, depart. Such variations and modifications are therefore expressly intended to be embraced by the present invention be.

LIST OF REFERENCE NUMBERS

1

Engine transmission unit

2

casing

3

Motor housing portion

4

fastening area

5

insertion opening

6

Transmission case portion

7

caseback

8th

Side wall

9

pivot

10

worm

11

gearing

12

admission

13

admission

14

motor shaft

15

drive worm

16

Through opening

17

cable drum

18

guide grooves

19

claw

20

claw

21

Through opening

22

admission

23

circumferential projection

24

nose

25

upper end side

26

Rope nipple unit

27

Rope through

28

deflection

29

upper edge

30

poetry

31

sealing lips

32

upper housing cover

35

circlip

36

peripheral bead

37

paragraph

39

Rubber damping elements

40

Driven output driver

41

Conical serration

50

electric motor

51

plug-in electronic

52

baseplate

53

rope

54

guide rail

55

deflection

56

idler pulley

57

wrap

58

inward bent end

59

crank pin

60

gearing

61

Housing / brake pot

62

plate

100

Cable window

Claims (15)

Transmission unit for cable power windows of motor vehicles, comprising a drive (14, 50; 59, 60) and a drive (15, 10) cooperating with the drive, which is equipped with a rotatably mounted cable drum (17) for winding and unwinding a cable (17). 53) of the cable window lifter (100), characterized in that a diameter of the cable drum (17) is in a range of about 22 mm to about 30 mm and more preferably in a range of about 24 mm to about 28 mm and a reduction ratio of the transmission (15, 10) is in a range of about 1:38 to about 1:55, and more preferably in a range of about 1:42 to about 1:51. Transmission unit according to one of the preceding claims, wherein the cable drum (17) is designed so that the transmission unit (1) optionally for an electrical or Manual drive is used. Transmission unit according to one of the preceding claims, wherein the cable drum (17) optionally for a cable pull window lifter (100) for a front motor vehicle door or is designed for a cable window regulator (100) for a rear motor vehicle door. Transmission unit according to one of the preceding claims, wherein the cable drum (17) directly, in particular without the use of additional damping elements, with the Transmission, in particular with a worm wheel (10) is coupled. Transmission unit according to claim 4, wherein the cable drum (17) on an end face (25) has at least two engagement elements (19, 20), the form-fitting in Corresponding to these formed at least two counter-elements (12, 13) on a Engage the front side of the worm wheel (10). Transmission unit according to claim 5, wherein the engagement elements on each other diametrically opposite sides of the cable drum (17) are arranged. Transmission unit according to claim 4 or 5, wherein the engagement elements as Projections (19, 20) on the end face (25) of the cable drum (17) and the counter elements as corresponding to the projections formed receptacles (12, 13) on the front side of the worm wheel (10) are formed. Transmission unit according to one of claims 4 to 7, wherein the worm wheel (10) so is received in a housing portion (6) that a sealing means (30) the worm wheel (10) seals against the housing portion (6). Transmission unit according to claim 8, wherein the sealing means (30) has an upper edge of the Worm wheel (10) surrounds. Transmission unit according to claim 8, wherein the sealing means (30) has an upper edge (29) of the housing portion (6) engages around. Transmission unit according to one of the preceding claims, optionally for a manual (59, 60) or an electric (14, 50) drive is designed. Transmission unit according to claim 11, if this is related to one of Claims 6 to 8, wherein an engagement element (20) has a projection (24) for receiving a Brake or wrap spring (57) has a manual cable window lifter. Transmission unit according to Claim 11 or 12, in which on a housing (2) Fastening areas (4) are provided for fastening the gear unit (1), wherein the Mounting areas (4) for a manual and a motorized gear unit (1) are identical. Motor-gear unit for cable power windows of motor vehicles, characterized by an electric motor (50) which is coupled to the transmission unit (1), wherein a drive torque of the electric motor (50) is at most about 5.7 Nm and / or an output of the electric motor (50) is about 10 W at the maximum. Motor-gear unit according to claim 14, wherein the electric motor (50) for both a cable window lifter (100) for a front motor vehicle door as well as a cable window regulator (100) is designed for a rear vehicle door.

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