WO2021048168A1

WO2021048168A1 - Brush system

Info

Publication number: WO2021048168A1
Application number: PCT/EP2020/075145
Authority: WO
Inventors: Matthias Grosch
Original assignee: Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg
Priority date: 2019-09-10
Filing date: 2020-09-09
Publication date: 2021-03-18
Also published as: DE102019213762A1

Abstract

The invention relates to a brush system (36, 36') for directly mounting in a drive housing (24) of an adjustment drive (6), comprising two brush holders (38) for resiliently bringing one brush (34) each into electrical contact with a commutator (32), two chokes (40a, 40b), which are or can be brought into contact with the brush holders (38), two electrically conductive plug contacts (42a, 42b), which are or can be interlockingly and/or frictionally inserted into the drive housing (24) and which are each in the form of an electrical interface, and a thermal fuse (44), which is or can be brought into contact between one of the chokes (40a) and one of the plug contacts (42a).

Description

description

Brush system

The invention relates to a brush system for an adjustment drive. The invention also relates to an adjusting drive of a motor vehicle with such a brush system.

Nowadays, motor vehicles usually have a number of adjustment parts, for example a seat adjustment, an actuatable lock, window lifters and / or an adjustable sliding roof, which can be moved between different setting positions by means of an associated electric motor adjustment drive. The respective adjustment part is actuated by means of a gear driven by a direct current motor or electric motor, for example in the form of a worm gear with a (drive-side) worm on the motor shaft and with a (output-side) worm wheel. The transmission is conventionally arranged in a transmission housing to which the electric motor is flanged via its motor housing.

Such an electric motor, in particular a so-called commutator motor, comprises a stator and a rotor which is arranged on a motor shaft (rotor shaft) and which is moved within the stator by an alternating magnetic field. The rotor carries a field or excitation winding and the motor shaft has commutator segments fixed to the rotor, which are brushed by sliding contacts in the form of brushes of a brush system. The brush system and the commutator lamellas interact with the rotation of the motor axis in such a way that polarity reversal or commutation of the operating or motor current is achieved. This polarity reversal is necessary for the rotary movement of an electric motor operated with direct current. The brushes are conventionally roughly cuboidal rods pressed from carbon powder - possibly together with metal particles. Due to the sliding contact with the commutator segments, the brushes are subject to abrasion when the electric motor is in operation. In order to maintain contact between brush and commutator despite the abrasion, the brushes are usually pressed against the commutator concentric with the motor shaft by means of spring elements. When the electric motor is in operation, the direct current flows through the brushes and the commutator segments of the commutator into the exciter windings of the rotor.

Typically, the brush system is designed as a preassembled (sub) subassembly, which is installed in the drive housing during the assembly of the adjustment drive. The brush system here generally has a support element, for example a support plate, as a so-called brush support, on which the components of the brush system are preassembled. In other words, the brushes, the brush holders, the springs, the contacts for plugs or other interfaces as well as, for example, interference suppression components, sensors and thermocouples are preassembled on the brush holder, so that the brush system is then assembled as a whole during the assembly of the adjustment drive. This means that the brush system is typically (pre-) assembled separately, that is, separately from the adjustment drive and then fed to the production line of the adjustment drive.

The invention is based on the object of specifying a particularly suitable Bürstensys system for mounting in a drive housing. In particular, assembly should be made possible with as little effort and cost as possible. The invention is also based on the object of specifying a particularly suitable adjustment drive with such a brush system.

With regard to the brush system, the object is achieved with the features of claim 1 and with regard to the adjustment drive with the features of claim 9 according to the invention. Advantageous embodiments and Further developments are the subject of the respective subclaims. The advantages and refinements cited with regard to the brush system can also be applied to the adjustment drive and vice versa. The brush system according to the invention is suitable and set up for direct mounting in a drive housing of an electromotive, in particular brush-commutated, adjustment drive.

“Direct mounting” or “directly mounted” or “directly mountable” is to be understood here and in the following in particular as meaning that the components of the brush system are mounted or can be mounted directly in the drive housing.

This means that the components of the brush system are assembled directly in the drive housing. In other words, the brush system according to the invention is not designed as a preassembled (sub) assembly. In particular, the brush system has no carrier element or brush holder, so the brush system is designed without or without a brush holder. The components of the brush system are therefore not preassembled on a brush holder, but are designed in such a way that the individual components can be installed or integrated directly into the drive housing. According to the invention, therefore, there is preferably no separate assembly of the brush system and the adjustment drive.

The brush system here has two brush holders for resilient electrical contacting of a respective brush on a commutator of the adjustment drive. Furthermore, two chokes which are contacted or can be contacted with the brush holders are provided as electrical interference suppression elements (interference suppression chokes). The brush system also has two electrically conductive plug contacts which are positively and / or non-positively plugged into the drive housing or can be plugged in. A thermocouple in the form of a thermal fuse (temperature fuse) is or can be contacted as overload protection between one of the chokes and one of the plug contacts. This creates a particularly suitable brush system for mounting in a drive housing. In particular, a brush system that is particularly inexpensive and easy to assemble is thus implemented. On the one hand, there is no brush holder in the brush system according to the invention, which saves costs in this regard. Furthermore, compared to a brush system preassembled on a brush holder, there is no logistical effort for transport to the final assembly line of the adjustment drive, since the assembly of the components of the brush system in the drive housing can take place directly in the course of final assembly.

The conjunction “and / or” is to be understood here and below in such a way that the features linked by means of this conjunction can be designed both together and as alternatives to one another.

A “form fit” or a “form fit connection” between at least two interconnected parts is understood here and in the following in particular to mean that the interconnected parts are held together at least in one direction by a direct interlocking of contours of the parts themselves or by a indirect interlocking takes place via an additional connecting part. The "blocking" of a mutual movement in this direction is therefore due to the shape.

A “force fit” or a “force fit connection” between at least two interconnected parts is understood here and in the following in particular to mean that the interconnected parts are prevented from sliding off one another due to a frictional force acting between them. If there is no “connecting force” causing this frictional force (this means the force that presses the parts against each other, for example a screw force or the weight itself), the force-fit connection cannot be maintained and thus released. The plug contacts are, for example, as metallic components, in particular as stamped components, for example as stamped contacts or stamped grids, leads out. The plug contacts have, for example, laterally protruding arms as a stop or limit for the plug-in assembly. The plug contacts are designed as electrical interfaces, for example as connection contacts, for making electrical contact with the brush system.

The thermal fuse is designed, for example, as a bimetal thermal switch, which opens, so it does not switch electrically conductive when a predetermined nominal temperature is reached or exceeded. As a result, the brush system or an adjustment drive equipped with it is reliably protected from overload or overheating. This improves the operational reliability and the service life of the brush system or the adjustment drive.

The brush system is preferably customer-specific, that is, according to a particular customer requirement, can be implemented with further electrical interference suppression components or EMC elements, i.e. components to improve electromagnetic compatibility (EMC), and / or thermocouples or thermal protection elements. As a result, a customer- or project-specific variant formation of the brush system is realized, which enables further cost savings.

In an advantageous development, a capacitor element as an electrical interference suppression component is switched or switchable in parallel with the brush holders or with the brushes. This ensures a particularly high EMC of the brush system and the adjustment drive. The capacitor element is designed, for example, as an X2Y combination element which combines the function of an X capacitor (Cx) and two Y capacitors (Cy). As a result, a particularly compact and component-reduced arrangement is implemented.

In a preferred embodiment, the components of the brush system, i.e. the brush holder with brushes, the chokes, the plug contacts, the thermal fuse and, for example, the capacitor element, are mounted or mountable in the drive housing along a common mounting direction. This means that all parts or components are assembled from the same direction, i.e. the assembly of the brush system or the The drive housing is fitted with the (brush system) components from one side of the drive housing. In particular, the components are here mounted from a housing face. As a result, fully automatic or fully automated assembly and / or production of the brush system is made possible or at least significantly simplified. As a result, the assembly costs of the brush system and the adjustment drive are advantageously reduced.

To assemble the brush system or its (individual) components, it is possible, for example, for the components to be placed and assembled individually in the drive housing, with electrical contacting and interconnection of the components taking place after such assembly. This ensures that the components can be installed in a particularly simple and cost-effective manner.

In a suitable embodiment, the components are connected to one another before they are mounted in the drive housing. In other words, the components are coupled or interconnected or contacted when the brush system or the components are inserted into the drive housing. This means that the brush system components are simply coupled or interconnected outside the drive housing, and the connected components are arranged together in the drive housing.

In a conceivable embodiment, the assembly or interconnection of the brush system and the installation of the brush system in the drive housing take place in separate or separate assembly steps when the adjustment drive is installed. In other words, the individual components of the brush system are interconnected and provided, taking into account the requirements of a particular (customer) application. The connected components are then mounted in the drive housing.

The brush holder or brush holders are designed, for example, as quiver-like brush shafts, in which the respective brush is inserted by means of mechanical springs Effect whose spring force is displaceably mounted so that the brushes are automatically readjusted to compensate for abrasion. The spring force can be generated, for example, by means of leg, compression, leaf or roll band springs.

In a preferred embodiment, the brush system is designed as a flame brush system. The or each brush holder is designed as a leaf spring element, the respective brush being clamped to a first spring end (free end). The brush holder is thus designed as a resilient brush support arm. This means that the brush holder is designed as inherently resilient. The or each brush here has, for example, a protruding plug section which is clamped in a corresponding receptacle of the free or Fe derendes. As a result, a brush holder that can be produced particularly easily and inexpensively is realized.

In an advantageous development, the brush holder has a second spring end or fixed end, which is pre-mounted on an electrically conductive assembly plug. The assembly plug is inserted or can be plugged into the drive housing in a form-fitting and / or force-fitting manner. This means that the brush holder and the assembly plug are designed as a pre-assembled assembly. The brush holder is, for example, riveted or caulked fastened or fixed to the assembly corner, and thus electrically conductively contacted with it. As a result, the assembly plug is designed as a mechanical interface between the brush holder and the drive housing. This results in an advantageous separation of functions, so that the brush holder can be designed with regard to the most optimal possible resilient contact of the brush, and the assembly plug with regard to the most stable and reliable fastening or assembly possible.

The assembly plugs are, for example, similar to the plug contacts, designed as me-metallic components, in particular as stamped components, for example as stamped contacts or stamped grids. In an expedient development, the plug contacts and / or the Mon day plug are each led out with a plug-in end and a contact end, which are arranged on the axially opposite sides of the respective plug. The or each insertion end is designed with a toothed Einsteckkon structure for positive and / or non-positive fastening in the drive housing. The or each contact end is formed with an insulation displacement contact. As a result, a particularly advantageous plug geometry with regard to a particularly simple and cost-reduced assembly and interconnection of the brush system components is realized.

In the assembled state (assembled state), the respective plug is secured against slipping or shifting by means of the plug-in contour of the plug-in end. The plug-in contour is, for example, sawtooth-like or fir tree-like, and prevents the respective connector from being displaced by means of the barbed teeth, both during assembly and during operation of the drive.

Due to the insulation displacement contacts, the plugs are essentially designed as electrical interfaces or interconnection points for wiring or interconnection or contacting the individual components.

The or each insulation displacement contact has at least one cutting edge (insulation displacement terminal). In order to interconnect and contact the components, it is possible, for example, for connecting wires between the components or plugs to be coupled in an electrically conductive manner by means of the insulation displacement contact. It is also conceivable, for example, that a throttle end or a throttle leg of a throttle is inserted into the insulation displacement contact in an electrically conductive manner, so that no additional wiring is necessary between these components. This enables assembly and interconnection of the brush system that is particularly cost-effective and material-reduced.

An additional or further aspect of the invention provides that the assembly plug is arranged two adjacent at their respective contact ends Have insulation displacement contacts. This means that the assembly plugs each have two insulation displacement contacts. These are suitably spaced from one another and conveniently provided on the same side of the assembly connector. This enables the brushes to be connected in a simple and expedient manner, in particular with regard to electrical interference suppression elements. For example, in each of the first insulation displacement contact, a throttle is con tacted, which is connected in series with the respective brush, with a capacitor element being contacted in each of the second insulation displacement contacts, which is connected in parallel to the brushes.

In a preferred application, the brush system described above is part of an adjustment drive of a motor vehicle, for example a window lifter motor. The adjustment drive has a drive housing and an electric motor arranged therein with a stator and a brush-commutated rotor. In other words, the rotor of the electric motor is coupled to the brush system.

By using a brush system according to the invention to assemble or manufacture the adjustment drive, that is to say through the assembly of the individual components without an additional brush holder, a particularly simple and inexpensive assembly of the adjustment drive is realized. As a result, an adjustment drive that is inexpensive and easy to manufacture is realized.

Here and in the following, “axial” or an “axial direction” is understood to mean in particular a direction parallel (coaxial) to the axis of rotation of the electric motor, that is to say perpendicular to the end faces of the stator or the drive housing. Correspondingly, here and in the following, “radial” or a “radial direction” is understood to mean in particular a direction oriented perpendicular (transversely) to the axis of rotation of the electric motor along a radius of the stator or the electric motor. “Tangential” or a “tangential direction” is understood here and in the following to mean, in particular, a direction along the circumference of the stator or the electric motor (circumferential direction, azimuthal direction), ie a direction perpendicular to the axial direction and to the radial direction. The brush system is mounted, for example, from an axial end face of the drive housing. For the purpose of a simple and cost-reduced and reliable installation of the brush system, the drive housing is suitably designed with joining contours for fastening the individual components.

In an advantageous embodiment, the throttles of the brush system are designed as Zylin derspulen, which are positively and / or non-positively used in the joining contours of the drive housing. The joining contours are, for example, formed in one piece, that is to say in one piece or monolithically, onto the drive housing. This enables simple assembly and fastening, for example in the form of a plug-in assembly / fastening, which enables throttles in the drive housing.

In an expedient development, the drive housing has a number of plug-in receptacles as joining contours provided for the plugs. This means that the plug-in receptacles are designed for, in particular, form-fitting and / or force-fitting plug-in fastening of the plug contacts and / or the assembly plugs. By means of the plug-in receptacles, the respective plugs are preferably secured against slipping or shifting. As a result, a particularly simple and tool-reduced and operationally reliable assembly of the plug contacts and the brush holder is realized.

In a conceivable embodiment, a connection socket is integrated into the drive housing, the plug contacts preferably forming the connection contacts of the connection socket, which are designed as mating contacts for each fork contact of a connection plug connector. In other words, the plug contacts are designed as contact lugs or electrical interfaces of the adjustment drive or the brush system. This means that the connection socket is essentially a feed-through opening in the drive housing through which contact can be made with the plug contacts. As a result, a particularly simple and component-reduced adjusting drive is realized. In particular, a particularly simple and flexible contacting of the adjustment drive is thus achieved implemented with a customer-specific power source or with a customer-specific connector. As a result, the adjusting drive according to the invention has a particularly high flexibility with regard to a customer interface. Exemplary embodiments of the invention are explained in more detail below with reference to a drawing. Show in it:

Fig. 1 in a schematic representation of a vehicle window regulator with egg nem electromotive adjustment drive,

2 shows a perspective illustration of a brush system of the adjusting drive in a first embodiment,

3 shows a plan view of the brush system in the first embodiment,

Fig. 4 is a perspective view of a free end of a brush holder with egg ner clamped brush,

Fig. 5 is a perspective view of a mounting plug with attached brush holder,

Fig. 6 is a perspective view of a plug contact of the Bürstensys system,

Fig. 7 is a perspective view of a socket of the Verstellan drive,

8 shows the connection socket in a front view,

Fig. 9 is a perspective view of the brush system in a second imple mentation form,

Fig. 10 is a perspective view of the brush system in the second imple mentation form,

11 shows a plan view of the brush system in the second embodiment,

12 shows the connection socket in a perspective view, and FIG

13 shows the connector socket of the brush system and a connector plug in a perspective view.

Corresponding parts and sizes are always provided with the same reference numerals in all figures. 1 shows, in a simplified and schematic representation, an electric vehicle window lifter 2 as an adjusting device for a (vehicle) window pane 4 of a motor vehicle. The window lifter 2 has an adjustment drive 6 with a bürstenkom mutated electric motor 8, which acts on the window pane 4 by means of an actuating mechanism 10 of the adjustment drive 6. The adjusting mechanism 10 has a guide rail 12 and a driver or rail slider 14 coupled to the window pane 4. The window lifter 2 is arranged, for example, in a frameless side door of the motor vehicle. The actuating mechanism 10 also has a cable pull 16.

The electric motor 8 drives a cable drum 20 of the adjustment drive 6 via a worm or spur gear 18. A pull rope of the cable pull 16 is arranged on the cable drum 20 in such a way that when the cable drum 20 rotates caused by the gear mechanism 18, the pull rope is wound and unwound. The example, designed as a Bowden cable 16 moves the window pane 4 via pulleys 22 of the guide rail 12. When the adjustment drive 6 is actuated, the window pane 4 is moved into its (pane) position P. The window pane 4 is reversible between a closed position S, which represents the highest possible position P, and an open position O, which represents the lowest possible position P, can be moved. In these positions S and O, the window pane 4 is indicated by dashed lines in FIG. In contrast, the window pane 4 is shown in a half-open intermediate position with solid lines.

The adjusting drive 6 has a drive housing 24 in which a stator 26 fixed to the housing and a rotor 28 of the electric motor 8 that is rotatably mounted in this are arranged. The rotor 28 is joined in a shaft-fixed manner to a rotor or motor shaft 30, which is coupled to the transmission 18 on the shaft end. The electric motor 8 is designed as a bürstenkom mutated direct current motor. For this purpose, a commutator 32 is arranged on the motor shaft 30, which rotates or rotates ge in the loading of the electric motor 8 together with the motor shaft 30 and the rotor 28. The commutator 32 has a number of unspecified is provided commutator bars, which are coated or contacted by means of brushes 34 of a Bürstensys system 36 in an electrically conductive manner.

The drive housing 24 is made, for example, of a motor housing and a gear housing flanged to it, the electric motor 8 and the commutator 32 and the brush system 36 being arranged in particular in the electric motor housing or housing section of the drive housing 24.

A first exemplary embodiment of the brush system 36 is explained in more detail below with reference to FIGS. 2 to 8.

The brush system 36 is suitable and set up for direct assembly in the drive housing 24. The brush system 36 thus has no additional or separate brush holder or a carrier plate. The components of the brush system 36 are thus mounted directly or immediately in the drive housing 24.

In the exemplary embodiment shown, the brush system 36 is designed in particular as a hammer brush system for a four-pole electric motor 8. The brushes 34 of the brush system 36 are arranged offset from one another by approximately 90 ° on the outer circumference of the commutator 32.

The brush system 36 has, as (individual) components, two brush holders 38 for resilient electrical contacting of the respective brush 34 on the commutator 32, and two throttles 40a, 40b that are or can be contacted with the brush holders 36 as electrical interference suppression chokes, and two electrically conductive plug contacts 42a, 42b. A thermocouple 44 in the form of a thermal fuse is located between the choke 40a and the plug contact 42b (Temperature fuse) contacted or contactable as overload protection. The brush system 36 also has a capacitor element 46 which is connected or switchable parallel to the brush holders 38 or to the brushes 34 as an electrical interference suppression or EMC component.

The components of the brush system 36 are mounted or mountable in the drive housing 24 along a common Mon day direction M (FIG. 5). The assembly direction M is oriented approximately parallel to the viewing direction of the representations in FIG. 2 and FIG. 3 and thus essentially perpendicular to a housing face of the drive housing 24. This means that the brush system 36 is mounted or can be mounted from a housing front side.

The thermocouple 44 is preferably carried out as a bimetal thermal switch. The thermocouple 44 is here connected or contacted with a line 48 on the one hand to the plug contact 42a and on the other hand to a throttle leg of the throttle 40a.

The capacitor element 46 is designed, for example, as an X2Y combination element which combines the function of an X capacitor and two Y capacitors.

The chokes 40a, 40b are designed as screw or cylinder coils which surround a respective ferrite core 50 coaxially. The throttles 40a, 40b with the respective ferrite core 50 are inserted into a joint contour 51 of the drive housing 24 in a form-fitting and / or force-fitting manner.

The brush holders 38 are designed as leaf spring elements in this embodiment. The brush holder 38 is out as a resilient brush support arm, which is attached to a mounting frame 54 by means of a spring end or fixed end 52, and which has a second spring end or free end 56, to which the brush 34 is held clamped. The brush holder 38 is bent in such a way that a resilient and operationally reliable contact of the brush 34 on the commutator segments of the commutator 32 is guaranteed. As can be seen comparatively clearly in FIG. 4, the brush 34 has a protruding plug-in section 58 which is clamped in a corresponding recording of the free or spring end 56. To this end, the free end 56 has an approximately rectangular recess 60 and two spring tabs 62 protruding into this. As shown in FIG. 4, the plug-in section 58 is inserted into the recess 60, so that the spring tabs 62 are bent outward, that is, away from the commutator 32, and thus fix the plug-in section 58 in a clamping manner.

The fixed end 52 is joined by means of two unspecified rivet connections to the respective mounting plug 54 and connected to it in an electrically conductive manner. The assembly plug 54 and the brush holder 38 attached to it thus form a preassembled assembly. The assembly of this assembly is shown in FIG.

The assembly plug 54 is designed in particular as a stamped component, for example as a stamped contact or a stamped grid. The assembly plug 54 has an insertion end 64 and a contact end 66. The brush holder 38 is preassembled on a flat side 68 of the assembly plug 54 facing the commutator 32.

The insertion end 64 is provided with a toothed, for example sawtooth-shaped or fir tree-shaped, plug-in contour 69 for positive and / or non-positive (plug-in) attachment in a plug-in receptacle or plug-in pocket 70 of the drive housing 24. The barbed teeth of the plug-in contour 69 or of the plug-in end 64 prevent the assembly plug 54 from being displaced both during (plug-in) assembly in the plug-in receptacle 70 and during operation of the adjustment drive

The contact end 66 has two laterally protruding arms 72 which, as axial stops, define the insertion or insertion path in the plug-in receptacle 70 limit, and rest on a top side 74 of the plug-in receptacle 70 supported in the assembled or plugged-in state. The contact end 66 also has egg NEN in the assembled state axially directed insulation displacement contact 76 with an unspecified insulation displacement terminal.

The plug contacts 42a, 42b are designed in particular as punched components of the same type, for example as punched contacts or punched grids. The plug contacts 42a, 42b each have an insertion end 80 and a contact end 82, which are arranged on the axially opposite end faces of the respective plug 42a, 42b.

As can be seen comparatively clearly in the illustration in FIG. 6, the insertion end 80 and the contact end 82 are designed in a manner similar to the insertion end 64 and the contact end 66 of the assembly plug 54.

The insertion end 80 is provided on both sides with a toothed insertion contour 83, for example sawtooth-shaped or in the shape of a fir tree. The insertion end 80 is designed for the form-fitting and / or force-fitting (plug-in) fastening in a recess-like or hole-like plug-in receptacle 84 of the drive housing 24. The barbed teeth of the plug-in contour 83 or the plug-in end 80 ensure a stable and reliable hold of the plug contact 42a, 42b in the plug-in receptacle 84, even during operation of the adjustment drive 6. The contact end 82 of the plug contacts 42a, 42b has an insulation displacement contact 86.

The plug receptacles 84 are arranged parallel to each other and approximately perpendicular to the housing wall of the drive housing 24 be adjacent.

For assembly, the plug contacts 42a, 42b are inserted or plugged into the plug-in receptacles 84 approximately perpendicularly along the assembly direction M. The Insertion end 80 is here axially limited by means of two laterally protruding arms 88.

The arms 88 serve as an axial stop when the plug contacts 42a, 42b are inserted into the plug receptacles 84. The area of the plug contacts 42a, 42b that protrudes axially from the arms 88 each forms an electrical interface of the brush system 36 for connection to an external power or energy supply.

As can be seen from FIGS. 7 and 8, the housing wall of the drive housing 24 has an integrated connection socket 90, the end faces of the plug contacts 42a, 42b facing the connection socket 90 as contact lugs or electrical connection contacts, for example as a plus and Minus connection, the brush system 36 are executed.

As can be seen in particular in FIG. 3, the drive housing 24 has an approximately square cross-sectional shape when viewed from the housing end face or along the assembly direction M. The cross-sectional shape is essentially dependent on the polycyclic magnets of the electric motor 8 or rotor 28, and can also be approximately circular, for example.

The plug contacts 42a, 42b are parallel to one another approximately centrally on the housing side of the drive housing 24 having the connection socket 90. The choke 40b on the one hand and the thermocouple 44 on the other hand are arranged in the corner areas adjoining this housing side.

The throttle 40b is contacted with one throttle leg with the insulation displacement contact 86 of the plug contact 42b on the one hand and with the other throttle leg with the insulation displacement contact 76 of the mounting plug 54 or connected. As a result, the brush 34 of the brush holder 38 is electrically conductively connected to the throttle 40b and the plug contact 42b. The line 48 connecting the plug contact 42a and the thermocouple 44 is inserted, on the one hand, into the insulation displacement contact 86 of the plug contact 42a, and on the other hand, it is welded to an unspecified connection of the thermocouple 44. A throttle limb of the throttle 40a is welded to the other connection of the thermocouple 44. The arranged in the corner area opposite to the throttle 40b arranged throttle 40a is fastened with the second throttle leg in the insulation displacement contact 76 of the associated Mon day plug 54.

In each of the insulation displacement contacts 76, in addition to a throttle limb, a line 92 is contacted which is, for example, part of the capacitor element 46. The capacitor element 46 is arranged opposite the plug contacts 42a, 42b, and by means of the lines 92 electrically connected in parallel to the current path formed by the brushes 34 and the commutator bars coated therewith.

A second exemplary embodiment of the brush system 36 'is shown in FIGS. 9 to 13 and is explained in more detail below.

The brush system 36 ′ differs essentially in the arrangement of the components in the installation space of the drive housing 24 and in the design of the assembly plugs 54.

As can be seen comparatively clearly in FIG. 9, in FIG. 10 and in FIG. 11, the assembly plugs 54 in the contact end 66 in this embodiment each have two adjacently arranged insulation displacement contacts 76a, 76b. The respective throttle limb of the throttles 40a, 40b is inserted into the insulation displacement contacts 76a, the lines 92 for connecting the capacitor element 46 being inserted into the insulation displacement contacts 76b.

In this embodiment of the brush system 36 ′, the joining contours 51 and the throttles 40a, 40b held by them are arranged in the corner regions of the drive housing 24 adjacent to the plug contacts 42a, 42b. The The thermocouple 44 is here oriented approximately parallel to the plug contact 42a between the latter and the throttle 40a. The thermocouple 44 here has two axially directed contact lugs 94 for welding contact of the Lei device 48 on the one hand and the throttle leg on the other hand.

As can be seen in FIGS. 12 and 13, the integrated connection socket 90 has joining contours along its outer circumference in the form of latching receptacles 96 and a guide groove 98, by means of which a connector 100 can be fastened positively and / or non-positively. The connection plug connector 100 here has two fork contacts 102 which, in the assembled state, each clamp one of the plug contacts 42a, 42b in a contacting manner.

In the assembled state, the snap-in receptacles 96 snap or clip with snap-in noses 104 of the connector 100. The connector 100 has an extension (not shown) as a joining or positioning aid, which is positively guided in the guide groove 98 during the mounting or plugging process. The connection plug connector 100 is connected, for example, to a wiring harness or to a supply network, for example an on-board network of the motor vehicle.

The invention is not restricted to the exemplary embodiments described above. Rather, other variants of the invention can be derived from the specialist man without leaving the subject matter of the invention. In particular, all of the individual features described in connection with the exemplary embodiments can also be combined with one another in other ways without departing from the subject matter of the invention.

To assemble the brush system 36, 36 'or its (individual) components 34, 38, 40a, 40b, 42a, 42b, 44, 46, it is possible, for example, that the components 34, 38, 40a, 40b, 42a, 42b , 44, 46 can be placed and assembled individually in the drive housing 24, with electrical contacting and connection of the components 34, 38, 40a, 40b, 42a, 42b, 44, 46 taking place after such assembly. Alternatively, the components 34, 38, 40a, 40b, 42a, 42b, 44, 46 are connected to one another before they are mounted in the drive housing 24. In other words, the components 34, 38, 40a, 40b, 42a, 42b, 44, 46 are coupled or interconnected or contacted when the brush system 36, 36 'or the components 34, 38, 40a, 40b, 42a, 42b, 44, 46 are inserted into the drive housing 24.

List of reference symbols

2 vehicle windows

4 window pane

Adjustment drive

8 electric motor 10 actuating mechanism 12 guide rail 14 driver 16 cable pull 18 spur gear 20 cable drum 22 deflection pulleys 24 drive housing 26 stator

28 rotor 30 motor shaft 32 commutator 34 brush 36, 36 'brush system

38 brush holder

40a, 40b choke 42a, 42b plug contact 44 thermocouple 46 capacitor element

48 line

50 ferrite core

51 joint contour

52 spring end / fixed end 54 assembly plug

56 spring end / free end 58 plug section 60 recess 62 spring clip

64 spigot end

66 End of contact

68 plan page

69 Insertion contour

70 plug-in receptacle 72 extension arm 74 top

76, 76a, 76b insulation displacement contact

80 spigot end

82 End of contact

83 plug-in contour

84 Plug-in receptacle 86 IDC contact 88 Extension 90 Connection socket 92 Cable 94 Contact lug 96 Latching receptacle 98 Guide groove 100 Connection plug connector 102 Fork contact 104 Latching lug

P position of the target

S closed position

0 open position

M mounting direction

Claims

Expectations

1. Brush system (36, 36 ‘) for direct assembly in a drive housing (24) of an adjustment drive (6), comprising - two brush holders (38) for resilient electrical contacting of a respective brush (34) on a commutator (32),

- two with the brush holder (38) contacted or contactable chokes (40a, 40b),

- Two electrically conductive plug contacts (42a, 42b) which are positively and / or non-positively inserted or plugged into the drive housing (24) and which are each designed as an electrical interface, and

- A thermal fuse (44) which is or can be contacted between one of the throttles (40a) and one of the plug contacts (42a).

2. brush system (36, 36 ‘) according to claim 1, characterized in that parallel to the brush holders (38), a capacitor element (46) GE switches or is switchable.

3. brush system (36, 36 ') according to claim 1 or 2, characterized in that the components (34, 38, 40a, 40b, 42a, 42b, 44, 46) along a common assembly direction (M) in the drive housing ( 24) are mounted or mountable.

4. brush system (36, 36 ') according to one of claims 1 to 3, characterized in that the components (34, 38, 40a, 40b, 42a, 42b, 44, 46) are connected to each other before they are in the drive housing (24) can be mounted.

5. Brush system (36, 36 ') according to one of claims 1 to 4, characterized in that the or each brush holder (38) is designed as a leaf spring element, the respective brush (34) clamping at a first spring end (52) is attached.

6. brush system (36, 36 ‘) according to claim 5, characterized in that the brush holder (38) has a second spring end (52) which is preassembled on an electrically conductive assembly plug (54), wherein the

Assembly plug (54) is inserted or can be inserted into the drive housing (24) in a form-fitting and / or force-fitting manner.

7 brush system (36, 36 ') according to one of claims 1 to 6, characterized in that the plug contacts (42a, 42b) and / or the assembly plugs (54) each have an insertion end (64, 80) with a toothed insertion contour (69 , 83) for attachment to the drive housing (24), and a contact end (66, 82) with an insulation displacement contact (76, 76a, 76b, 86) arranged opposite the insertion end (64, 80).

8. brush system (36, 36 ‘) according to claim 7, characterized in that the assembly plugs (54) have two adjacently arranged insulation displacement contacts (76a, 76b) at their respective contact ends (66).

9. Adjusting drive (6) of a motor vehicle, comprising a drive housing (24) and an electric motor (6) arranged therein with a stator (26) and a brush-commutated rotor (28), as well as a brush system mounted in the drive housing (24) (36, 36 ') according to one of claims 1 to 8.

10. adjusting drive (6) according to claim 9, characterized in that the throttles (40a, 40b) are designed as solenoids which are positively and / or non-positively inserted into joining contours (51) of the drive housing (24).

11. adjusting drive (6) according to claim 9 or 10, characterized in that the drive housing (24) has a number of plug-in receptacles (70, 84) for positive and / or non-positive plug-in fastening of the plug contacts (42a, 42b) and / or the assembly plug (54).

12. Adjusting drive (6) according to one of claims 9 to 11, characterized in that a connection socket (90) is integrated into the drive housing (24), wherein the plug contacts (42a, 42b) as mating contacts for a respective fork contact (102) one Connection plug connector (100) are formed.