DE102019213762A1 - Brush system - Google Patents

Abstract

The invention relates to a brush system (36, 36 ') for direct assembly in a drive housing (24) of an adjusting 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 plugged into the drive housing (24), and which are each as an electrical interface are formed, and a thermal fuse (44), which is contacted or contacted between one of the throttles (40a) and one of the plug contacts (42a).

Description

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 DC 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 bars interact when the motor axis rotates 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 the contact between the brush and the commutator despite the abrasion, the brushes are usually pressed against the commutator concentric with the motor shaft by means of spring elements with spring force. When the electric motor is in operation, the direct current flows through the brushes and the commutator segments of the commutator into the excitation windings of the rotor.

Typically, the brush system is designed as a preassembled (sub) subassembly, which is built into the drive housing during the assembly of the adjustment drive. The brush system here generally has a carrier element, for example a carrier plate, as a so-called brush carrier, 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 brush 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 adjusting drive with such a brush system.

With regard to the brush system, the object is achieved according to the invention with the features of claim 1 and with regard to the adjustment drive with the features of claim 9. Advantageous refinements and 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 designed for direct assembly 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, there is therefore 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 that are 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 inserted or can be inserted into the drive housing in a form-fitting and / or force-fitting manner. 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, the brush system according to the invention eliminates the need for a brush holder, which saves costs in this regard. Furthermore, compared to a brush system preassembled on a brush holder, there is no logistical effort for the 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 below in particular to mean that the interconnected parts are held together at least in one direction by direct interlocking of contours of the parts themselves or by 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 designed, for example, as metallic components, in particular as stamped components, for example as stamped contacts or stamped grids. 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 bimetallic thermal switch which opens, that is to say it does not switch electrically conductive, when a specified 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, with further electrical interference suppression components or EMC elements, i.e. components for improving 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 is connected or switchable as an electrical interference suppression component 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 realized.

In a preferred embodiment, the components of the brush system, ie the brush holders 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 mounted from the same direction, i.e. that the brush system or the (brush system) components are mounted on the drive housing from one side of the drive housing. In particular, the components are mounted here from a housing face. This results in a fully automated or fully automated assembly and / or manufacture of the brush system enabled or at least significantly simplified. This advantageously reduces the assembly costs of the brush system and of the adjustment drive.

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, electrical contacting and interconnection of the components taking place after such assembly. This ensures that the components can be assembled 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 with one another 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, when the adjustment drive is installed, the brush system is assembled or interconnected and the brush system is installed in the drive housing in separate or separate assembly steps. 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 (s) are designed, for example, as quiver-like brush shafts in which the respective brush is mounted displaceably by means of mechanical springs under the action of their spring force, 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 hammer 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-in section which is clamped in a corresponding receptacle of the free or spring end. As a result, a brush holder that can be produced in a particularly simple and cost-effective manner is realized.

In an advantageous development, the brush holder has a second spring end or fixed end which is preassembled 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 attached or fixed to the assembly plug, 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 metallic components, in particular as punched components, for example as punched contacts or punched grids.

In an expedient development, the plug contacts and / or the assembly plugs are each designed 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 insertion contour 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 is implemented with regard to a particularly simple and cost-reduced assembly and interconnection of the brush system components.

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 designed, for example, like a sawtooth or a fir tree, and by means of the teeth acting as barbs prevents the respective connector from being displaced both during assembly and during operation of the drive.

As a result of the insulation displacement contacts, the plugs are essentially designed as electrical interfaces or interconnection points for wiring or interconnecting 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 limb 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 plugs have two adjacently arranged insulation displacement contacts at their respective contact ends. This means that the assembly plugs each have two insulation displacement contacts. These are suitably spaced from one another and expediently provided on the same side of the assembly plug. This enables the brushes to be connected in a simple and expedient manner, in particular with regard to electrical interference suppression elements. For example, a choke is contacted in each of the first insulation displacement contacts, which is connected in series with the respective brush, with a capacitor element being contacted in the respective second insulation displacement contact, which is connected in parallel with 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 regulator motor. The adjustment drive has a drive housing and an electric motor arranged therein with a stator and with 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 perpendicularly (transversely) to the axis of rotation of the electric motor along a radius of the stator or the electric motor. Here and in the following, “tangential” or a “tangential direction” is understood to mean in particular a direction along the circumference of the stator or the electric motor (circumferential direction, azimuthal direction), that is to say 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 simple and cost-reduced and operationally reliable assembly 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 cylinder coils which are inserted into the joining contours of the drive housing in a form-fitting and / or force-fitting manner. 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 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 with a customer-specific power source or with a customer-specific plug connector is thus implemented. As a result, the adjustment drive according to the invention has a particularly high flexibility with regard to a customer interface.

• 1 in einer schematischen Darstellung einen Fahrzeugfensterheber mit einem elektromotorischen Verstellantrieb,
• 2 in perspektivischer Darstellung ein Bürstensystem des Verstellantriebs in einer ersten Ausführungsform,
• 3 in Draufsicht das Bürstensystem in der ersten Ausführungsform,
• 4 in perspektivischer Darstellung ein Freiende eines Bürstenhalters mit einer klemmbefestigten Bürste,
• 5 in perspektivischer Darstellung einen Montagestecker mit befestigten Bürstenhalter,
• 6 in perspektivischer Darstellung einen Steckerkontakt des Bürstensystems,
• 7 in perspektivischer Darstellung eine Anschlussbuchse des Verstellantriebs,
• 8 in Frontansicht die Anschlussbuchse,
• 9 in perspektivischer Darstellung das Bürstensystem in einer zweiten Ausführungsform ,
• 10 in perspektivischer Darstellung das Bürstensystem in der zweiten Ausführungsform,
• 11 in Draufsicht das Bürstensystem in der zweiten Ausführungsform,
• 12 in perspektivischer Darstellung die Anschlussbuchse, und
• 13 in perspektivischer Darstellung die Anschlussbuchse des Bürstensystems und einen Anschlusssteckverbinder.

Exemplary embodiments of the invention are explained in more detail below with reference to a drawing. Show in it:

• 1 a schematic representation of a vehicle window regulator with an electric motor adjustment drive,
• 2 a perspective illustration of a brush system of the adjustment drive in a first embodiment,
• 3 in plan view the brush system in the first embodiment,
• 4th a perspective view of a free end of a brush holder with a clamped brush,
• 5 a perspective view of a mounting plug with attached brush holder,
• 6th a perspective view of a plug contact of the brush system,
• 7th a connection socket of the adjustment drive in a perspective view,
• 8th the connection socket in the front view,
• 9 a perspective view of the brush system in a second embodiment,
• 10 a perspective view of the brush system in the second embodiment,
• 11 in plan view the brush system in the second embodiment,
• 12th the connection socket, and in a perspective view
• 13th in a perspective view, the connector socket of the brush system and a connector.

Corresponding parts and sizes are always provided with the same reference symbols in all figures.

In the 1 is a simplified and schematic representation of an electric vehicle window regulator 2 shown as an adjusting device for a (vehicle) window pane 4 of a motor vehicle.

The window regulator 2 has an adjustment drive 6th with a brush commutated electric motor 8th on, which by means of an adjusting mechanism 10 of the adjustment drive 6th on the window pane 4th works. The adjusting mechanism 10 has a guide rail 12th and one with the window pane 4th coupled driver or rail slider 14th on. The window regulator 2 is arranged, for example, in a frameless side door of the motor vehicle. The adjusting mechanism 10 also has a cable 16 on.

The electric motor 8th drives via a worm or spur gear 18th a rope drum 20th of the adjustment drive 6th at. A pull rope of the cable pull 16 is like this on the cable drum 20th arranged that at through the gearbox 18th caused rotations of the cable drum 20th winding and unwinding of the pull rope takes place. The cable, for example designed as a Bowden cable 16 moved over pulleys 22nd the guide rail 12th the window glass 4th .

When the adjustment drive is actuated 6th becomes the window pane 4th in their (disc) position P. proceed. The window glass 4th is reversible between a closed position S. which is the highest possible position P. represents, and an open position O which is the lowest possible position P. represents, movable. In these positions S. and O is the window pane 4th in the 1 each indicated by dashed lines. With solid lines is the window pane 4th however, shown in a half-open intermediate position.

The adjustment drive 6th has a drive housing 24 in which a stator fixed to the housing 26th and a rotatably mounted rotor in this 28 of the electric motor 8th are arranged. The rotor 28 is shaft-fixed with a rotor or motor shaft 30th joined, which shaft end side with the gear 18th is coupled.

The electric motor 8th is designed as a brush commutated DC motor. This is done on the motor shaft 30th a commutator 32 arranged, which in operation of the electric motor 8th together with the motor shaft 30th and the rotor 28 rotated or rotated. The commutator 32 has a number of commutator bars, not shown in detail, which by means of brushes 34 a brush system 36 are coated or contacted to be electrically conductive.

The drive housing 24 is designed for example from a motor housing and a gear housing flanged to it, the electric motor 8th and the commutator 32 as well as the brush system 36 in particular in the motor housing or housing section of the drive housing on the electric motor side 24 are arranged.

Below is a first embodiment of the brush system 36 based on 2 to 8th explained in more detail.

The brush system 36 is for direct assembly in the drive housing 24 suitable and furnished. 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 directly or immediately in the drive housing 24 assembled.

In the embodiment shown, the brush system is 36 especially as a hammer brush system for a four-pole electric motor 8th executed. The brushes 34 of the brush system 36 are offset by about 90 ° to one another on the outer circumference of the commutator 32 arranged.

The brush system 36 has two brush holders as (individual) components 38 for resilient electrical contacting of the respective brush 34 on the commutator 32 , and two with the brush holders 36 contacted or contactable throttles 40a , 40b as electrical interference suppression elements (interference suppression chokes), as well as two electrically conductive plug contacts 42a , 42b on. Between the throttle 40a and the plug contact 42b is a thermocouple 44 in the form of a thermal fuse (temperature fuse) contacted or contactable as overload protection. The brush system 36 also has a parallel to the brush holders 38 or to the brushes 34 switched or switchable capacitor element 46 as an electrical interference suppression or EMC component.

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

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

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 thrushes 40a , 40b are designed as screw or cylinder coils, which have a respective ferrite core 50 surrounded coaxially. The thrushes 40a , 40b are with the respective ferrite core 50 form-fitting and / or force-fitting in one joining contour each 51 of the drive housing 24 used.

The brush holder 38 are designed as leaf spring elements in this embodiment. The brush holder 38 is designed as a resilient brush arm, which by means of a spring end or fixed end 52 on a mounting plug 54 is attached, and which has a second spring end or free end 56 has on which the brush 34 is held clamped. The brush holder 38 is bent in such a way that a resilient and reliable contact of the brush 34 on the commutator bars of the commutator 32 is guaranteed.

Like in the 4th can be seen comparatively clearly, the brush has 34 an upstanding plug-in section 58 on, which in a corresponding receptacle of the free or spring end 56 is clamped. The free end points to this 56 an approximately rectangular recess 60 and two spring tabs protruding into this 62 on. Like in the 4th shown is the male portion 58 into the recess 60 inserted so that the spring tabs 62 to the outside, i.e. from the commutator 32 away, be bent and thus the plug-in section 58 fix in place.

The end of the festival 52 is by means of two unspecified rivet connections to the respective assembly plug 54 joined and connected to this in an electrically conductive manner. The assembly plug 54 and the attached brush holder 38 thus form a preassembled assembly. The assembly of this assembly is in 5 shown.

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 a spigot end 64 and a contact end 66 on. The brush holder 38 is on one of the commutators 32 facing plan side 68 of the assembly plug 54 pre-assembled.

The plug-in end 64 is provided with a toothed, for example sawtooth-shaped or fir-tree-shaped, plug-in contour provided on both sides 69 for positive and / or non-positive (plug-in) fastening in a plug-in receptacle or a plug-in pocket 70 of the drive housing 24 executed. The teeth of the plug-in contour, which act as barbs 69 or the insertion end 64 prevent the assembly plug from shifting 54 both during (plug-in) assembly in the plug-in receptacle 70 as well as during operation of the adjustment drive 6th .

The end of contact 66 has two laterally protruding arms 72 on, which as axial stops the insertion or insertion path in the receptacle 70 limit, and in the assembled or inserted state on a top 74 the plug-in socket 70 rest supported. The end of contact 66 furthermore has an insulation displacement contact which is axially directed in the assembled state 76 with an unspecified insulation displacement connector.

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

As in the representation of the 6th can be seen comparatively clearly, are the spigot end 80 and the end of contact 82 similar to the spigot end 64 and the end of contact 66 the assembly plug 54 executed.

The plug-in end 80 is on both sides with a toothed, for example sawtooth or fir tree-shaped, plug-in contour 83 Mistake. The plug-in end 80 is here for the positive and / or non-positive (plug-in) fastening in a recess-like or hole-like plug-in receptacle 84 of the drive housing 24 executed. The teeth of the plug-in contour, which act as barbs 83 or the insertion end 80 provide a stable and operationally safe hold of the plug contact 42a , 42b in the plug-in socket 84 , even during operation of the adjustment drive 6th , for sure.

The end of contact 82 the plug contacts 42a , 42b has an insulation displacement contact 86 on.

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

The plug contacts are used for assembly 42a , 42b along the mounting direction M. approximately vertically into the plug-in receptacles 84 inserted or plugged in. The plug-in end 80 is here in each case by means of two outriggers protruding from the side 88 axially limited.

The boom 88 serve as an axial stop when inserting the plug contacts 42a , 42b into the plug-in receptacles 84 . The boom 88 axially protruding area of the plug contacts 42a , 42b each forms an electrical interface of the brush system 36 for connection to an external power or energy supply.

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

The drive housing 24 points - as in particular in the 3 visible - from the front of the housing or along the mounting direction M. viewed from an approximately square cross-sectional shape. The cross-sectional shape is essentially that of the polycyclic magnets of the electric motor 8th or rotor 28 dependent, and can, for example, also be approximately circular.

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

The thrush 40b is with a 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 assembly plug 54 contacted or connected. This is the brush 34 of the brush holder 38 electrically conductive with the throttle 40b and the plug contact 42b connected.

The plug contact 42a and the thermocouple 44 connecting line 48 is on the one hand in the insulation displacement contact 86 of the plug contact 42a used, and on the other hand at an unspecified connection of the thermocouple 44 welded. At the other connection of the thermocouple 44 is a throttle leg of the throttle 40a welded. The one opposite to the throttle 40b arranged corner area arranged throttle 40a is in the insulation displacement contact with the second throttle limb 76 of the assigned assembly connector 54 attached.

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

In the 9 to 13th is a second embodiment of the brush system 36 ' shown and 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 as well as in the design of the assembly plug 54 .

Like in the 9 , in the 10 and in the 11 is comparatively clearly visible, indicate the mounting plugs 54 in the contact end 66 in this embodiment two adjacent insulation displacement contacts 76a , 76b on. In the insulation displacement contacts 76a becomes the respective throttle leg of the throttles 40a , 40b inserted into the insulation displacement contacts 76b the lines 92 for connecting the capacitor element 46 can be used.

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

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

The snap-in receptacles lock or clip in the assembled state 96 with locking lugs 104 of the connector 100 . The connection connector 100 has an extension, not shown in detail, as a joining or positioning aid, which during the assembly or plugging process in the guide groove 98 Is guided positively. The connection connector 100 is connected, for example, to a cable harness or to a supply network, for example an electrical system of the motor vehicle.

The invention is not restricted to the exemplary embodiments described above. Rather, other variants of the invention can also be derived therefrom by the person skilled in the art without departing from 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.

For mounting 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 individually in the drive housing 24 placed and assembled, with electrical contacting and interconnection of the components 34 , 38 , 40a , 40b , 42a , 42b , 44 , 46 takes place after such an assembly.

Alternatively, the components 34 , 38 , 40a , 40b , 42a , 42b , 44 , 46 connected together before going into the drive housing 24 to be assembled. In other words, are the components 34 , 38 , 40a , 40b , 42a , 42b , 44 , 46 coupled or interconnected or contacted when the brush system 36 , 36 ' or the components 34 , 38 , 40a , 40b , 42a , 42b , 44 , 46 into the drive housing 24 can be used.

List of reference symbols

2

Vehicle window lifters

4th

Window pane

6th

Adjustment drive

8th

Electric motor

10

Adjusting mechanism

12th

Guide rail

14th

Carrier

16

Cable

18th

Spur gear

20th

Rope drum

22nd

Pulleys

24

Drive housing

26th

stator

28

rotor

30th

Motor shaft

32

commutator

34

brush

36, 36 '

Brush system

38

Brush holder

40a, 40b

throttle

42a, 42b

Plug contact

44

Thermocouple

46

Capacitor element

48

management

50

Ferrite core

51

Joining contour

52

Spring end / fixed end

54

Mounting plug

56

Spring end / free end

58

Plug-in section

60

Recess

62

Spring tab

64

Spigot end

66

End of contact

68

Plan page

69

Plug-in contour

70

Plug-in receptacle

72

boom

74

Top

76, 76a, 76b

Insulation displacement contact

80

Spigot end

82

End of contact

83

Plug-in contour

84

Plug-in receptacle

86

Insulation displacement contact

88

boom

90

Connection socket

92

management

94

Contact flag

96

Snap recording

98

Guide groove

100

Connector

102

Fork contact

104

Locking lug

P

Target position

S.

Closed position

O

Open position

M.

Mounting direction

Claims (12)

Brush system (36, 36 ') for direct assembly in a drive housing (24) of an adjustment drive (6), having - 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 inserted or can be plugged into the drive housing (24) in a form-fitting and / or force-fitting manner, 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). Brush system (36, 36 ') according to Claim 1 , characterized in that a capacitor element (46) is connected or switchable in parallel with the brush holders (38). Brush system (36, 36 ') according to Claim 1 or 2 , characterized in that the components (34, 38, 40a, 40b, 42a, 42b, 44, 46) are mounted or mountable in the drive housing (24) along a common mounting direction (M). Brush system (36, 36 ') according to one of the Claims 1 to 3 , characterized in that the components (34, 38, 40a, 40b, 42a, 42b, 44, 46) are connected to one another before they are mounted in the drive housing (24). Brush system (36, 36 ') according to one of the Claims 1 to 4th , characterized in that the or each brush holder (38) is designed as a leaf spring element, the respective brush (34) being clamped to a first spring end (52). 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), the assembly plug (54) being inserted or positively locked into the drive housing (24) or is pluggable. Brush system (36, 36 ') according to one of the Claims 1 to 6th , 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 The plug-in ends (64, 80) have oppositely arranged contact ends (66, 82) with an insulation displacement contact (76, 76a, 76b, 86). 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). Adjusting drive (6) of a motor vehicle, comprising a drive housing (24) and an electric motor (6) arranged therein with a stator (26) and with a brush-commutated rotor (28), as well as a brush system (36, 36) mounted in the drive housing (24) ') according to one of the Claims 1 to 8th . Adjusting drive (6) Claim 9 , characterized in that the throttles (40a, 40b) are designed as cylinder coils which are inserted into the joining contours (51) of the drive housing (24) in a form-fitting and / or force-fitting manner. Adjusting drive (6) Claim 9 or 10 , characterized in that the drive housing (24) has a number of plug-in receptacles (70, 84) for form-fitting and / or force-fitting plug-in fastening of the plug contacts (42a, 42b) and / or the assembly plugs (54). Adjusting drive (6) according to one of the Claims 9 to 11 , characterized in that a connection socket (90) is integrated into the drive housing (24), the plug contacts (42a, 42b) being designed as mating contacts for a respective fork contact (102) of a connection plug connector (100).

Images