DE4337390C2 - Drive unit for adjustment systems in motor vehicles - Google Patents

Description

The invention relates to a drive unit for Adjustment systems in motor vehicles according to the preamble of Claim 1.

EP 0 474 904 A1 describes a commutator gearbox Drive unit for the window drive of a motor vehicle Stuff known that flanged a commutator motor transmission and integrated motor electronics. The integrated motor electronics contain the electronics component-receiving single-surface circuit board  which is an integrally molded brush receiving part for the Brush holder of the commutator device of the commutator mo tors is provided. Furthermore, the PCB a one-piece molded connector plug-on Part for the connector of the commutator gear be drive unit arranged.

The known drive unit points for the gear housing and the electronics housing is a one-piece basic housing on that is divided in a level that is in the level of PCB of the motor electronics and perpendicular to the axis of the worm gear of the gearbox. That on the ladder plate-shaped brush holder part is on the side of the printed circuit board inserted in the basic housing from and forms a passage for the commutator of the commutator mo tors. The motor shaft of the The commutator motor drives the worm with a worm shaft rad on, which in turn with a pulley of a rope train window lifter is coupled. The commutator's pole pot motors is in one level with the base housing of the gearbox bes and the engine electronics connected perpendicular to the Motor shaft and thus perpendicular to the housing division of the Base housing is.

Because in the known commutator gear drive unit the brush receiving part in one piece to the Printed circuit board is formed and as a narrow bridge from the PCB protrudes is only a minor mechanical Stability of the stationary part of the commutator is given. Furthermore, the one-piece base housing with the Gearbox and the engine electronics housing a compli graced seal contour with large expansion, so that a  secure sealing is problematic. With the arrangement of the Gearbox and engine electronics in one Basic housing, the housing division perpendicular to the assembly surface of the pole pot of the commutator motor is arranged, are sealing surfaces provided in intersecting planes, what also leads to increased sealing problems.

Furthermore, the gear housing is open on one side in order to the circuit board of the motor electronics in the base housing to be able to insert so that the area of the connection between the pole pot screw and the base housing multiple screw connections is unstable.

The object of the present invention is to be a drive unit for adjustment systems in motor vehicles at the beginning mentioned type with integrated in the engine electronics stationary commutation device of the electric motor create that in relation to the electric motor, the transmission and the motor electronics can be standardized, mechanically sta bil, easy and safe sealable and easy to assemble is.

This object is achieved by the characterizing Features of claim 1 solved.

The solution according to the invention creates a drive unit with stationary commu integrated in the motor electronics tierungseinrichtung the electric motor by the connec between the gearbox and the electric motor via the Electronics chassis is highly standardized, so that the gear housing for both electronic and used for electrical controls of the electric motor  can be and different performance sizes of the Elek tromotors can be used, for example via the Connection of poles of different lengths.

Because the connection between the electric motor and the transmission via the electronics chassis, d. H. that essentially bearing part of the engine electronics, and since with the Electronics chassis also the commutation brush guide facility is connected, is the entire Construction of the drive unit mechanically extremely stable. The connection levels between the electronics chassis and the gear housing on the one hand and the electronics chassis and the pole pot of the electric motor on the other hand are in same levels, making the entire drive unit simple and is securely sealable because the sealing layer intersects or jumping sealing contours can be avoided.

As a result of the universal screw-on and modular simply designed connection of the individual elements of the The drive unit ensures extremely simple installation.

Because the current supply of brushes on conductor tracks independent of the electri  switching of the electronic module takes place Printed circuit board for electronic only Components of the electronic module are available.

The energization of the brushes of the stationary commutation Direction of the electric motor independent of the circuit board the motor electronics also enables an optimal arrangement and Design of the engine electronics and their assembly and one any exchange of engine electronics depending from the specifications required in each case.

An advantageous embodiment of the invention This characterizes a solution for a commutator motor net that the brush guide from in Electronics chassis diametrically opposite channels exists in which the brushes are resiliently mounted are.

Another advantageous embodiment of the invention essen solution is characterized in that the electronics module is plugged into a standard electronics housing.

The separation of the electronics module from the electronics housing enables the connection of different embodiments the engine electronics with the same electric motor / gearbox con figuration for different purposes of the An Drive unit in adjustment systems for motor vehicles depending on the housing configuration of the drive unit. It is also a simple replacement of the engine electronics possible in the event of faults without major installation effort, esp special without disassembling the electromo gate / gear unit must be done.

The electronics module can preferably be located in an intermediate czar ge can be arranged both with the gearbox as well is connected to the electric motor.

a current supply and brush guide unit, which between the gear and the motor of a drive is arranged, is known from US Pat. No. 4,398,135; however, this unit does not form an intermediate frame, variable with each other via the engine and transmission can be connected.  

The arrangement of the electronics module in an intermediate frame between the electric motor and the transmission increases flexibility the drive unit with the adaptation to special techni needs such as different engine power, integration Extension or elimination of the engine electronics, mirror images Arrangement of the electronics housing for reasons of space and thus a high degree of flexibility with a large variety of variants and greatly reduced variety of parts.

The electronics chassis can be part of the intermediate frame or be the supporting part of the electronic module. By doing in one case the intermediate frame takes over the static function on, while in the other case the intermediate frame as a bandage link for mounting the electronic module and for the connection tion of the electric motor with the gear housing.

The solution according to the invention also makes it possible Embodiment of the invention, possibly necessary interference suppression elements such as chokes, varistors and the like, which are otherwise to arrange additional auxiliary circuit boards of the brush holder NEN are to be provided in the electronics module, the Arrangement in the electronics module on printed circuit boards or in corresponding cast resin elements embedded or in inte built components can be done.

Another advantageous embodiment of the invention essen solution is characterized in that the electronics chassis and / or the intermediate frame on the one hand and that Gear housing, on the other hand, a form-fitting one another adapted suspension or insertion device for positioning tion of the electronics module.  

Such a suspension device, which usually consists of a clip connection exists, allows a simple Position fixation of the electronics chassis or the intermediate frame before screwing or otherwise fastening the Electronics chassis or the intermediate frame on the gearbox house.

A further advantageous embodiment is characterized records that by turning the electronics chassis or the intermediate frame a sealing form fit between the Attachment device for the gearbox housing and electronics chassis or the intermediate frame with simultaneous form and / or non-positive connection of the electric motor or whose pole pot with the electronics chassis or the Zwi frame is done.

The positive connection between the electronics chas sis or the intermediate frame and the gear housing ters the assembly by simple position fixation and reduced the number of fasteners required for fastening the individual components (gear housing / electronics housing / motor housing) of the drive unit.

The modular structure of the drive unit and the continuous static connection of the basic components of the drive unit enables a high degree of flexibility and variation the selection of the individual basic components, d. H. their Design, performance and application specification. Dement speaking in a development of the invention Solution the electronics module with protruding outside Plug contacts are provided that meet the specification of the Electronic module are adapted. Furthermore, the electro  nikmodul basic sensor elements for controlling the Have electric motor in the area of the stationary Commutation device are integrated.

The electronics chassis can be sufficient to form Stability also plugged into the gearbox or with be connected to the gearbox so that from the connec between electronics module and gearbox housing high static stability of the stationary commutation is guaranteed. This can, for example se done in that the electronics module on the transmission housing can be plugged on and parts of the gear housing as load-bearing components that are integrated into the electronics module serve stationary commutation device.

As the electric motor of the drive unit can also be a Serve converter motor, its stationary commutation Device from a converter unit for an electro African commutation of the electric motor exists. In one such case becomes the electronic commutation device device integrated in the electronics module by the electronics chas sis added.

Based on the embodiment shown in the drawing should play the idea underlying the invention are explained in more detail. Show it:

Figure 1 is a schematic representation of a Antriebsein unit with an electric motor, transmission and motor electronics for adjustment systems in motor vehicles with partially cut components.

FIG. 2 shows the drive unit shown in FIG. 1 with separate components;

Fig. 3 is a schematic perspective view of an electric module with electronic chassis;

Fig. 4 is a schematic perspective view of a Zwischenzarge for accommodating an electronic module;

Fig. 5 is a drive unit with attachable to the transmission housing electronics module and

Fig. 6 is a plan view of a commutation device connected to the electronics chassis.

The drive unit shown in Fig. 1 for adjusting systems in motor vehicles consists of an electric motor 5 with a motor housing or pole pot 50 , a gear 4 with a gear housing 40 which is connected to the drive shaft of the electric motor 5 on the one hand and the adjusting system (not shown) on the other hand. An engine electronics in the form of an electronics module 1 is in one. Electrical electronics housing 10 arranged or integrated into an electronics housing 10 .

The electronics module 1 has an electronics chassis 2 , which essentially carries out load-bearing or stability functions and is connected to the electrical or electronic circuit device of the electronics module 1 . The electrical or electronic circuit of the electronic module 1 can be arranged on a circuit board or be contained in an integrated component or consist of a potting component having the electrical and electronic components.

The electronic chassis 2 of the electronic module 1 has a clip-on projection 21 which engages in a correspondingly shaped clip-undercut 42 engages the gear housing 40, and a fixation position or partial attachment of the Elektronikmo duls 1 allows the transmission casing 40th Furthermore, the electronics module 1 is provided with a plug connection 8 , via which the electrical connection of the drive unit to a higher-level control, regulating and / or monitoring device of a motor vehicle takes place.

The electronics module 1 is connected to the electric motor 5 or its pole pot 50 via a flange part 22 of the electronics chassis 2 , which establishes the connection between the gear housing 40 and the pole pot 50 of the electric motor 5 . In this flange 22 of the electronics chassis, the stationary commutation device 6 of the electromotor 5 is integrated, so that a necessary part for the operation of the electric motor 5 is shifted from the actual motor housing 50 and thus a unification and shortening of the motor housing or pole pot 50 is achieved .

The gear housing 40 has a recess 43 for receiving me part of the motor electronics, which is arranged in the embodiment shown in FIG. 1 between the hanging device 21 , 42 of the electronics module 1 and the gear housing 40 and the flange part 22 of the electronics module 1 , so that the housing 10 of the electronics module 1 can be optimized accordingly, since part of the electrical or electronic circuit or the electronics module integrated in the housing 10 can be moved accordingly into the free space 43 of the transmission housing 40 .

A section through the housing parts of the transmission 4 , the electronics module 1 and the pole pot 50 in the area of the motor shaft 53 of the electric motor 5 is intended to illustrate the connection of the stationary part of the commutation device to the electronics chassis 2 .

The stator 51 of the electric motor 5 is connected to the pole pot 50, which is connected via through-bolts 91, 92 with the electronics chassis 2 of the gearbox 40th In the pole pot 50 , the motor shaft 53 is mounted with the rotor 52 and protrudes from the pole pot 50 into the electronics chassis 2 or electronics module 1 , where the commutation device 6 of the electric motor 5 is arranged.

The commutation device 6 consists of a commutator 61 connected to the motor shaft 53 of the electric motor 5 and a brush guide 62 connected to the electronics chassis 2 , in which brushes 63 are mounted in a longitudinally displaceable manner. In addition, there is the possibility of arranging a speed sensor, for example in the form of a Hall sensor 7 in the area of the electronics chassis 2 , the Hall magnet 71 being connected to the motor shaft 53 and the associated Hall wall 72 being connected to the electronics chassis 2 .

The extension of the motor shaft 53 protrudes into the gear housing 40 and forms a worm shaft 42 which meshes with a worm wheel 41 of the gear 4 . The worm wheel 41 is connected in a manner not shown with an adjustment system of a motor vehicle, for example a window mechanism, a seat adjustment or the like.

In this embodiment, the assembly of the miteinan connected screw and motor shaft 42 , 53 , the commutator 61 and the rotor 52 in the direction of arrow M₁, the mounting direction of this drive unit.

Fig. 2 shows the exploded components of the drive unit according to FIG. 1, which are mounted in the arrow direction A shown in FIG. 2 A. First, the clip projection 21 of the electronics module 1 is hooked into the corresponding undercut 42 of the gear housing 40 and thus the electronics module 1 is pre-adjusted. Then the pole pot 50 is placed on the electronics chassis 2 of the electronics module 1 and connected to the electronics module 1 or the gear housing 40 in a positive and / or non-positive manner.

If necessary, for final assembly of the drive unit, the electronics module 1 is pivoted slightly in one direction or the other, so that an additional form-locking connection of the clip connection between the electronics module 1 and the gear housing 40 takes place.

The modular drive unit ensures a limitation of the variety of gear housings a standardization of electric motors for motor vehicles tool adjustment systems by universal drivers universal screw connection and for the different Motor manufacturers have the same pole pot adaptation dimensions on the electrical system nikchassis or on the intermediate frame. At the same time, a Always the same and optimal sealing sealing system stem without intersecting seals and a compact one Structure of the drive unit created in the modula the structure of the drive unit with minimum space requirements different places of connection with a motor vehicle Stuff adjustment system can be arranged.

Fig. 3 shows a perspective view of an electronics module 1 , which is particularly suitable for use in connection with an intermediate frame according to FIG. 4. This electronics module 1 can also be integrated in another way into an electronics housing or connected to a gearbox housing without an intermediate frame corresponding to FIG. 4 being required.

The electronics module 1 has an electronics chassis 2 in a compact design with an essentially cuboid housing configuration 23 . On the front of the elec tronic chassis 2 are perpendicular from the surface contact pins 24 , which correspond to the contact pins 81 shown in FIG. 4. A lateral guide on both sides of the contact pins serves to receive a contact housing corresponding to the contact housing 8 according to FIG. 4.

In the lower part of the electronics chassis 2 , a housing configuration 22 which is in the form of a fork is provided, in which opposing brush guides 62 are arranged, which are designed as quiver guides for the carbon brushes 63 of the commutation device of the electric motor, the carbon brushes using leg springs 64 against the comm mutator of the electric motor be pressed.

The electrical connection to the carbon brushes 63 is made by means of metal tracks 65 , which are led directly to the outer surface of the electronics chassis 2 , so that the metal tracks 65 are formed as separate lines that are not part of the circuit board of the electronics circuit.

The electronics module 1 shown in Fig. 3 integrates the brush guide 62 in its electronics chassis 2 , so that the previously usual brush holder is completely eliminated as part. The current supply to the carbon brushes 63 of the commutation device of the electric motor takes place via conductor tracks independently of the circuit board. Interference suppression components can be accommodated on the preferably single-layer printed circuit board if required. In this form, the electronic module 1 can be standardized as far as possible and used for a wide variety of applications and performance ranges.

Fig. 4 shows a schematic-perspective view of an electronic chassis 2 , which is designed as an intermediate frame 3 for mounting on a gear housing on the one hand and for fastening the pole pot of an electric motor on the other.

The intermediate frame 3 has, analogously to the exemplary embodiments shown in FIGS . 1 and 2, a clip hook for connecting the intermediate frame 3 to the gear housing via a suspension device for fixing the position of the intermediate frame, so that a previously common screwing of the electronics module to the gear housing at this point not applicable. A connector 8 contains a plurality of contact pins 81 , the configuration of which is adapted to customer-specific connectors or to the electrical or electronic circuitry of the electronic module.

The intermediate frame 3 forms a carbon brush chamber 31 in the area of the pole pot receptacle, which has through holes 32 at the corner points of its frame for receiving the fastening screws of the pole pot. The through holes are preferably provided with steel bushings in order to increase the strength of the intermediate frame 3 in the fastening region of the pole top.

A larger, the contour of the intermediate frame 3 on the connection surface to the gear housing following seal 91 and a smaller the contour of the carbon brush chamber following seal 92 provide the sealing connection between the gear housing on the one hand and the pole pot on the other.

The electronic module 1 of FIG. 3 may be as shown in Fig. 4 shown arrow direction B in the Zwischenzarge 3 is inserted and then projects to the reasoner, the stationary commutation of the electric motor forming part in the carbon brush chamber and with the plug contacts 81 in the in Fig. 4 shown connector housing 8th

The arrangement and structure of the intermediate frame 3 saves at least two additional screw connections required for the electronics as a result of the clip connection of the intermediate frame to the gear housing. As a result of the arrangement of the stationary commutation device in the carbon brush chamber, the pole pot of the electric motor can be shortened, so that the electric motor itself becomes lighter or the pole pot becomes cheaper. In this embodiment, the drive unit manages with only two seals, which are to be attached to the intermediate frame, so that there is no cracking of the seal contour or crossing seals can occur.

Between a custom connector and one Electronics for the drive unit with a universal Connecting part, an adapter piece can be provided establishes the desired connections without the elec tronic connection to the special customer-specific Solution must be adjusted.

In Fig. 5, a drive unit is Darge provides, in which the electronics chassis can be inserted into the gear housing, so that part of the static functions of the electronics chassis is taken over by the gear housing. For this purpose, the electronics module 1 according to FIG. 5 can be plugged into an insert of the gear housing 40 and connected to the gear housing 40 . The electronics chassis protrudes with its part having the static commutation device in the connection region of the transmission housing 40 with the pole pot 50 of the electric motor 5 and provides the connection of the static commutation device with the commutator of a commutator motor or a corresponding part of the rotor Converter motor.

Fig. 6 shows a plan view of a comm mutation device which is connected to an electronic chassis according to the invention.

The collector 61 attached to the motor shaft 53 contacts the brushes 63 which are connected to the electronic chassis 2 and which are static commutation devices. The motor shaft 53 protrudes into the transmission housing 40 and is connected there according to FIG. 2 to a worm shaft which engages in a corresponding worm wheel. In addition, a Hall magnet 7 is provided in the arrangement according to FIG. 6, which corresponds to a Hall converter connected to the electronics chassis 2 and serves as an actual value transmitter for the motor speed or as a position transmitter for the rotor of the electric motor.

Instead of a Hall converter, any other actual value can also be used encoder for recording the engine speed or angular position tion of the electric motor can be used, for example a magnetic, capacitive or optoelectronic sensor sor.

The assembly takes place in this embodiment perpendicular to the mounting direction shown in FIG. 1, ie perpendicular to the plane of the drawing in the direction of the arrow M₂ shown symbolically.

Claims (12)

1. Drive unit for an adjustment system in a motor vehicle with an electric motor having a commutation device, a transmission connected to the motor shaft and the adjustment system and an electronic circuit having an electrical circuit for feeding the electric motor, characterized in that the brush guide ( 62 ) of the commutation device ( 61-63 ) is connected to a load-bearing component of the electronic module ( 1 ) formed by an electric chassis ( 2 ) and that the brushes ( 63 ) of the communication device ( 61-63 ) are provided with conductor tracks ( 65 ) which are not part of a PCB of the electronic module ( 1 ). 2. Drive unit according to claim 1, characterized in that the brush guide ( 62 ) from the electronics chas sis ( 2 ) consists of diametrically opposite channels in which the brushes ( 63 ) are slidably mounted. 3. Drive unit according to claim 1 or 2, characterized in that the electronic module ( 1 ) in an intermediate frame ( 3 ) is arranged, both with the gearbox housing ( 40 ) and with the pole pot ( 50 ) of the electromotive gate ( 5 ) is connected. 4. Drive unit according to at least one of the preceding claims, characterized in that the electronics module ( 1 ) is inserted into an electronics housing ( 10 ). 5. Drive unit according to at least one of the preceding claims, characterized in that Entstörbauelemen te on a circuit board of the electronic module ( 1 ) are arranged. 6. Drive unit according to at least one of the preceding claims, characterized in that the electrical and / or electronic components of the electronic module ( 1 ) are cast into a housing ( 23 ) which forms the electronic chassis ( 2 ). 7. Drive unit according to at least one of the preceding claims, characterized in that the electronics chassis ( 2 ) and / or the intermediate frame ( 3 ) on the one hand and the gear housing ( 40 ) on the other hand a form-fittingly adapted, preferably designed as a clip connection suspension device ( 21 , 42nd ) to position the electronics module ( 1 ). 8. Drive unit according to claim 7, characterized in that the suspension device ( 21 , 42 ) is formed out such that by rotating the electronics chis sis ( 2 ) or the intermediate frame ( 3 ) a positive engagement between the suspension device's ( 21 , 42nd ) of the gearbox ( 40 ) and the electronics chassis ( 2 ) or the intermediate frame ( 3 ) with a simultaneous positive and / or non-positive connection of the electric motor ( 5 ) or its pole pot ( 50 ) with the electronics chassis ( 2 ) or the intermediate frame ( 3 ) can be produced. 9. Drive unit according to at least one of the preceding claims, characterized in that the sealing surfaces of the connection of the electronics module ( 1 ), the electronics housing ( 10 ) and / or the intermediate frame ( 3 ) with the electric motor ( 5 ) or the pole pot ( 50 ) and the gearbox ( 4 ) or gearbox housing ( 40 ) are arranged in an assembly direction. 10. Drive unit according to at least one of the preceding claims, characterized in that the electronics module ( 1 ), the electronics chassis ( 2 ) and / or the intermediate frame ( 3 ) has outwardly projecting contact pins ( 24 ), the configuration of which is variable. 11. Drive unit according to at least one of the preceding claims, characterized in that the electronics module ( 1 ) for controlling the electric motor ( 5 ) has sensor elements ( 7 ) required. 12. Drive unit according to claim 1, characterized in that the electronics chassis ( 2 ) with the gearbox housing ( 40 ) connected, preferably on the gearbox housing ( 40 ) can be plugged.