DE4337390C3 - 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 Ober Concept of claim 1.

EP 0 474 904 A1 describes a commutator Ge drive drive unit for the power window drive ei Nes motor vehicle known that a commutator mo gate, a flanged gear and an integrated Has engine electronics. The integrated motor electronics tronik contains one of the electronic components mende single-surface circuit board, on the one piece molded brush holder for the brush neck the commutator device of the commutator motors is provided. Furthermore is on the circuit board an integrally molded connector receptacle part for the connector of the commutator Ge drives drive unit arranged.

The known drive unit has for the transmission housing and the electronics housing a one-piece Ba sis housing, which is divided in a plane that in the Level of the printed circuit board of the engine electronics and lower is right to the axis of the worm gear. The brush holder molded onto the circuit board part is inserted from the side of the base housing circuit board and forms a passage for the Commutator of the commutator motor. The in the Ge drive housing extended motor shaft of the Kommuta tormotors drives the Schnec with a worm shaft kenrad, which in turn with a pulley one Cable window lifter is coupled. The pole pot of the Commutator motor is in one level with the base ge housing of the gearbox and the engine electronics are connected the one that is perpendicular to the motor shaft and thus perpendicular to the housing division of the basic housing.

As with the known commutator gearbox drive unit, the brush receiving part in one piece the circuit board is molded and as a narrow web of the PCB protrudes, is only a minor mechani cal stability of the stationary part of the commutator given. Furthermore, the one-piece basic housing is required with the gearbox and the engine electronics housing a complicated sealing 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.  

EP 0 335 352 A2 describes a drive unit for a Adjustment system in a motor vehicle with a commu tierungseinrichtung having electric motor, with a connected to the motor shaft and the adjustment system drives and with an electrical circuit for dining of the electric motor electronics module known. The Brush guide is with an electric chassis formed component of the electronic module connected. Electri cal and electronic units are arranged in chambers and connected to a grid, the conductor tracks to the utility supply of electrical and electronic units as well which has brushes. Flat seals are used for sealing used with one approach and numerous breakthroughs are provided.

This known drive unit has the disadvantage that the Chambers of the electronics chassis or electronics module very much have to be trained to find the exact location of the electrical and electronic units and a good one To ensure contact to the conductor tracks. This increases the manufacturing effort and leads to high manufacturing costs most. In addition, the flat gasket is due to the intended approach and the breakthroughs only with high effort to produce.  

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 be about the electronics chassis, d. H. that essentially supporting part of the engine electronics, and since with the electronics chassis Brush guide of the commutation device 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.  

In addition, the electrical and electronic construction elements of the electronic module, in particular connector con clock pins, relays, semiconductor elements, possibly necessary Interference suppression components such as chokes, varistors and the like, in cast in a housing that forms the electronics chassis. To do this, the electrical and electronic components for example embedded in cast resin elements.  

As a result of the universal screw-on and modular simply designed connection of the individual elements of the The drive unit is extremely easy to install continuous

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.

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 that 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.

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.  

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 an intermediate frame for receiving an electronics module;

Fig. 5 shows a drive unit with the electronics module pluggable on the housing and housing

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 , egg nem gear 4 with gear housing 40 , the verbun with the drive shaft of the electric motor 5 on the one hand and the adjustment system, not shown, on the other hand is. Motor electronics in the form of an electronics module 1 is arranged in an electronics housing 10 or integrated in an electronics housing 10 .

The electronics module 1 has an electronics chassis 2 , which essentially carries load-bearing or stability functions and is connected to the electrical or electronic circuitry of the electronics module 1 . The electrical or electronic circuit of the electronics module 1 can be arranged on a printed circuit board or be contained in an integrated component or consist of a casting 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 undercut 42 of the clip-Getriebege häuses accesses 40 and a position fixation or Teilbefesti supply of the electronic module 1 on the gear housing 40 allows. Furthermore, the electronics module 1 is provided with a plug connection 8 , via which the electrical connection of the drive unit with a superordinate control, regulating and / or monitoring device of a motor vehicle takes place.

The connection of the electronics module 1 with the electric motor 5 or its pole pot 50 takes place via a flange 22 of the electronics chassis 2 , which produces the connec tion between the gear housing 40 and the pole pot 50 of the electric motor 5 . In this flange part 22 of the electronics chassis, the stationary commu tation device 6 of the electric motor 5 is integrated, so that a necessary part for the operation of the electric motor 5 from the actual motor housing 50 is stored 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 a portion of the motor electronics, which in the illustrated in Fig. 1 embodiment Zvi the hooking device 21, 42 of the Elektronikmo duls 1 and the transmission case 40 and the flange's 22 of the electronic module 1 is disposed, so that the housing may be of the electronic module 1 in accordance with opti mized 10, since a part of the electrical or electronic circuit or the integrated electronic module 10 in the housing space corresponding to the free of the gear housing 43 can be displaced 40th

A section through the housing parts of the transmission 4 , the electronics module 1 and the pole pot 50 in the region 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 is mounted with the rotor 52 and 53 projecting from the pole pot 50 into the electronics chassis 2 and the electronic module 1, where the commutation device 6 of the electric motor 5 is disposed.

The commutation device 6 consists of a verbun with the motor shaft 53 of the electric motor 5 which commutator 61 and a brush guide 62 connected to the electronics chassis 2 , in which brushes 63 are longitudinally displaceably mounted. 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 transmission 4 . The worm wheel 41 is connected in a manner not shown in Darge with an adjustment system of a motor vehicle, for example a window lift mechanism, a seat adjustment or the like.

In this embodiment, the assembly of the interconnected worm and motor shaft 42 , 53 , the commutator 61 and the rotor 52 in Rich direction of the arrow M ₁ , 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. 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 gearbox 40 in a positive and / or non-positive manner.

If necessary, for final assembly of the drive unit, the electronic module 1 is pivoted slightly in one direction or the other, so that an additional positive connection of the clip connection between the electronic module 1 and the gearbox 40 is made.

The modular drive unit ensures a limitation of the gearbox fold, enables a unification of the electromo gates for the motor vehicle adjustment systems by uni verselle driver, a universal bolting and same pole for the different motor manufacturers Toppath dimensions on the electronics chassis or on the Intermediate frame. At the same time, it always remains the same sealing and optimal sealing system oh ne intersecting seals and a compact Structure of the drive unit created, the mo modular structure of the drive unit with minimal Space requirements at different locations of the connection arranged with a motor vehicle adjustment system can be.

Fig. 3 shows a perspective view of an electronics module 1 , which is particularly suitable for use in conjunction with an intermediate frame according to FIG. 4. However, this electronics module 1 can also be integrated in another way into an electronics housing or connected to a transmission housing without an intermediate frame according to FIG. 4 being necessary.

The electronics module 1 has an electronics chassis 2 in a compact design with an essentially cuboid housing configuration 23 . On the front side of the electronics chassis 2 are perpendicular to the surface of the 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 egg Nes contact housing corresponding to the contact housing 8 shown in FIG. 4th

In the lower part of the electronics chassis 2 , a fork-shaped housing configuration 22 is provided, in which opposing brush guides 62 are arranged, which are brushed as quiver guides for the carbon 63 of the commutation device of the electric motor, the carbon brushes using leg springs 64 against the commutator of the Electric motors can 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 which are not part of the circuit board of the electronic circuit.

The electronics module 1 shown in Fig. 3 inte grates the brush guide 62 in its electronics chas sis 2 , so that the previously usual brush holder is completely eliminated as part. The carbon brushes 63 of the commutation device of the electric motor are energized via conductor tracks independently of the circuit board. Interference suppressors can be accommodated on the preferably single-layer circuit board if necessary. In this form, the electronics module 1 can be largely standardized and used for the most varied of applications and performance ranges.

Fig. 4 shows a schematic-perspective presen- tation 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 hand.

The intermediate frame 3 has, analogously to the exemplary embodiments shown in FIGS . 1 and 2, a clip for connecting the intermediate frame 3 to the gear housing via a hooking device for fixing the position of the intermediate frame, so that a previously common screwing of the electronic 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 circuit of the electronic module.

The intermediate frame 3 forms in the area of the pole pot receptacle a carbon brush chamber 31 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 pot.

A larger, the contour of the intermediate frame 3 on the connection surface to the gear housing following you device 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 electronics module 1 according to FIG. 3 can be inserted in the arrow direction B shown in FIG. 4 into the intermediate frame 3 and then protrudes with the part forming the stationary commutation device of the electric motor into the carbon brush chamber and with the plug contacts 81 into the one in FIG. 4 shown plug housing 8 .

The arrangement and structure of the intermediate frame 3 saves at least two additional required screw connections for the electronics as a result of the clip connection of the intermediate frame to the gearbox. As a result of the arrangement of the statio nary 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 an egg ner electronics for the drive unit with a univer an adapter piece can be provided that creates the desired connections, without the electronics connection to the special one The customer-specific solution must be adapted.

In Fig. 5, a drive unit is shown, in which the electronics chassis can be inserted into the gear housing, so that part of the static functions of the electronics 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 electronic chassis protrudes with its part having the static commutation device into the connection area of the transmission housing 40 with the pole pot 50 of the electric motor 5 and produces the connection of the static commutation device with the commutator of a commutator motor or a corresponding part of the rotor of a converter motor.

Fig. 6 shows a plan view of a commutation device which is connected to an electronics chassis according to the invention.

The collector 61 attached to the motor shaft 53 contacts the brushes 63 of the static commutation device connected to the electronics chassis 2 . The motor shaft 53 protrudes into the gear housing 40 and is connected there according to FIG. 2 with 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 responds to a Hall converter connected to the electronics chassis 2 and serves as an actual value transmitter for the engine speed or as a position transmitter for the rotor of the electromotive gate.

Instead of a Hall converter, anyone else can Actual value transmitter for recording the engine speed or Angular position of the electric motor are used, for example a magnetic, capacitive or opto electronic sensor.

In this embodiment, the mounting is carried out perpendicular to the mounting direction according to FIG. 1, ie perpendicular to the plane of the drawing in the direction of the arrow M _{2 shown} symbolically.

Claims (7)

1. Drive unit for an adjustment system in a motor vehicle with a commutation device ( 61-63 ) having an electric motor ( 5 ), a gearbox ( 4 ) connected to the motor shaft ( 53 ) and the adjustment system, and an electrical circuit for feeding and driving the Electric motors ( 5 ) have the electronics module ( 1 ), the brush guide ( 62 ) of the commutation device ( 61-63 ) being connected to a load-bearing component of the electronics module ( 1 ) formed by an electronics chassis ( 2 ), and the electrical and electronic components of the electronics module ( 1 ), in particular plug contact pins ( 24 ), relays and semiconductor elements, are cast into a housing ( 23 ) which forms the electronics chassis ( 2 ), and for energizing the brushes ( 63 ) of the commutation device ( 61-63 ) Conductor tracks ( 65 ) are provided, which are not part of a circuit board of the electronics module ( 1 ). 2. Drive unit according to claim 1, wherein the electronics module ( 1 ) is arranged in an intermediate frame ( 3 ) which is connected both to the gear housing ( 40 ) and to the pole pot ( 50 ) of the electric motor ( 5 ). 3. Drive unit according to at least one of the preceding claims, wherein the electronics chassis ( 2 ) and / o the intermediate frame ( 3 ) on the one hand and the gear housing ( 40 ) on the other hand a form-fitting adapted te, preferably designed as a clip connection A hanging device ( 21 , 42 ) for positioning the electronics module ( 1 ). 4. Drive unit according to claim 3, wherein the Einzügevor direction ( 21 , 42 ) is designed such that by twisting the electronics chassis ( 2 ) or the intermediate frame ( 3 ) a positive connection between the suspension device ( 21 , 42 ) of the gear housing ( 40 ) and the elec tronic chassis ( 2 ) or the intermediate frame ( 3 ) with simultaneous positive and / or non-positive connection of the electric motor ( 5 ) or its pole pot ( 50 ) with the electronic chassis ( 2 ) or the intermediate frame ( 3 ) can be produced. 5. Drive unit according to at least one of the preceding claims, wherein 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 Ge gearbox ( 40 ) are arranged in one mounting direction. 6. Drive unit according to at least one of the preceding claims, wherein the electronics module ( 1 ), the elec tronic chassis ( 2 ) and / or the intermediate frame ( 3 ) has outwardly projecting contact pins ( 24 ), the configuration of which is variable. 7. Drive unit according to claim 1, wherein the electrical nikchassis ( 2 ) with the gear housing ( 40 ) connected, preferably on the gear housing ( 40 ) can be plugged.