DE102015210788A1 - Bearing shield system and electric motor drive with a bearing shield system - Google Patents

Abstract

The present invention relates to a bearing shield system for an electromotive drive (3) comprising: a bearing plate (2) having at least one opening (12) for receiving a mounting device and / or at least one opening (15) for passing a contact pin (18), and an insulating member (13) disposed on one side of the endshield (2), wherein the insulating member (13) is adapted to close the at least one opening (12) for receiving the jig and receiving the jig in the closed opening (12) and / or wherein the insulation element (13) is designed to close the opening (15) for passing a contact pin (18), the insulation element (13) having a passage (17) for passing the contact pin (18 ) through the closed opening (15).

Description

FIELD OF THE INVENTION

The present invention relates to a bearing plate system for an electric motor drive, as well as an electric motor drive with such a bearing shield system.

TECHNICAL BACKGROUND

In an EPS (Electric Power Steering) engine and the Electronic Control Unit (ECU), in most cases, the electric control unit (ECU) is on the B side, i. H. the non-driven side mounted. On this page usually the contacting takes place. Mostly or frequently both components are not sealed on this side to each other. Basically, both components have different requirements in terms of cleanliness and residual dirt, the component motor is here, as regards the particle size, less sensitive. Problem in the current concepts is that openings in the bearing plate, which are necessary for the action of the components in the assembly process, can move the particles in the electronic control unit (ECU).

The end shields of today's EPS motors are either deep-drawn steel parts or die-cast aluminum components. Depending on the application in conjunction with aluminum or blasting cabinets additional security elements are necessary here, since the interference fit in different temperature levels is different strong. The simple Stahltiefziehen is mainly cost advantage, but offers only for receiving the ball bearing. An aluminum die-cast shield, in turn, always offers itself when additional functions, such as a flange to be integrated with. An aluminum die casting usually requires a rework and is therefore relatively expensive.

From the DE 10 2008 013 402 A1 Furthermore, an electric machine for a hybrid vehicle is known with a stator, which is arranged in a housing, and with a rotor which is rotatably arranged in a bearing plate via rolling bearings. The end shield has a receiving portion on the rotor side, which is formed so that a cup-shaped bearing attachment is received. The bearing mounting in turn receives a rolling bearing. At the receiving portion of the bearing plate, a support section connects to the housing side passes into a mounting portion. In the attachment portion, at least one metallic sleeve is embedded in a fiber reinforced composite material to secure the end shield to the housing or a housing flange by means of screw connections.

SUMMARY OF THE INVENTION

Against this background, the present invention has the object to provide an improved bearing plate or bearing shield system for an electric motor drive.

According to the invention this object is achieved by a bearing plate system with the features of claim 1 and / or by an electric motor drive with the features of claim 11.

Accordingly, it is provided:
A bearing shield system for an electromotive drive comprising: a bearing plate, which has at least one opening for receiving a mounting device and / or at least one opening for passing a contact pin, and an insulation element, which is arranged on one side of the bearing plate, wherein the insulating element is formed the at least one opening for receiving the mounting device to close and allow receiving the mounting device in the closed opening and / or wherein the insulating element is designed to close the opening for passing a contact pin, wherein the insulation element has a passage for passing the contact pin through the closed opening.

The bearing shield system has the advantage that a respective opening for insertion of a mounting device, such. As a gripper, or a respective opening for performing a contact pins of the stator of the electric motor drive can be closed so that dirt particles can not pass through the opening unintentionally and, for example, arranged on the front of the bearing plate electronic control unit (ECU) or on The stator and rotor of the electromotive drive provided on the rear side of the bearing plate can become dirty. On the other hand, the insulating element also allows the bearing plate to be grasped simultaneously by a mounting device through the opening closed by means of the insulating element, or a contact pin can be guided and contacted by the associated opening closed by means of the insulating element. In addition, the bearing plate can be made for example as a metal sheet or die-cast part and at the same time the openings in the bearing plate against dirt passage are easily and inexpensively sealed without affecting the operation of the bearing plate.

The knowledge / idea underlying the present invention is to close openings in the bearing plate, which are necessary for the handling of the bearing plate in the assembly process and electrical contacting, such that the handling and contacting of the bearing plate on the one hand is still possible, but a passage Dirt particles through the respective opening is prevented.

Advantageous embodiments and further developments will become apparent from the other dependent claims and from the description with reference to the figures of the drawing.

In an embodiment according to the invention, the insulating element is formed with a recess below the opening for receiving the mounting device. The recess can be formed both with at least one undercut and without an undercut, depending on the mounting device used. As a mounting device can be z. B. a gripper or any other suitable transport and / or positioning can be used. The recess of the insulating element has the advantage that the opening is on the one hand covered and sealed against the passage of dirt. On the other hand, an intervention z. B. a gripper as a mounting device in the opening of the bearing plate through the recess still possible and thereby the handling of the bearing plate.

In a further embodiment according to the invention, the insulation element has a contact dome for closing the at least one opening, wherein the contact dome has at least one passage for passing a contact pin. By receiving the contact dome in the opening and thereby closing the opening by means of the contact dome, so that no more dirt can pass through the opening, in addition to preventing a passage of dirt simultaneously contacting a contact pin can be ensured.

According to one embodiment of the invention, the contact dome is provided, for example, with a slot-shaped opening for passing through a flat contact pin, in particular a flat conductor track, and / or a cylindrical opening for passing through a cylindrical contact pin, in particular a conductor wire. However, the invention is not limited to slot-shaped and cylindrical openings for carrying out a contact pin. The openings may have any shape suitable for passing an associated contact pin through the contact dome for electrically contacting it at an exit side of the contact dome.

In an embodiment according to the invention, the contact dome is formed with an opening with a catching and guiding geometry. The catching and guiding geometry of the opening is designed to receive or thread a contact pin on an input side of the contact dome and, on the other hand, to allow the contact pin to emerge at an exit side of the contact dome in a defined or predetermined end position and to hold it preferably in the end position fixing or supporting. The catch and guide geometry of the implementation of the contact dome assembly is simplified because the contact pin easily threaded into the passage and in turn can emerge automatically at a defined position from the contact dome.

In a further embodiment according to the invention, the catching and guiding geometry of the opening is designed as a tapering opening, which tapers from an entry side of the contact dome at least in a section in the longitudinal direction of the opening. Due to the extended area of the opening on the entrance side of the contact dome, the contact pin can be easily threaded, thereby simplifying assembly. By tapering the opening in the longitudinal direction to the exit side of the contact dome, the contact pin can again be guided in a targeted manner through the contact dome. The opening or the passage with the catching and guiding geometry can be formed, for example, with a bevel, with a conical section and an adjoining cylindrical section or cone-shaped catch and guide geometry, the invention is not limited to the examples mentioned.

In another embodiment of the invention, the insulation element is molded onto the bearing plate, plugged, with this as a part of plastic, in particular fiber-reinforced plastic, formed or glued to this. The insulating element and / or the bearing plate can be made for example of plastic, fiber-reinforced plastic, a metal sheet or a metal casting. The end plate and the insulating element can, for. B. from the same plastic or fiber reinforced plastic in one piece, z. B. as an injection molded part, be formed.

According to one embodiment of the invention, the bearing plate made of plastic or a fiber-reinforced plastic on its outer periphery on a ring member. The ring element can in this case be made of metal or metal alloy, for example.

In a further embodiment of the invention, the ring element has the same coefficient of thermal expansion as a Housing on, in which the bearing plate is added, or a coefficient of thermal expansion of the housing in which the bearing plate is added, as closely as possible thermal expansion coefficient. This has the advantage that in all occurring during operation temperature levels no additional securing elements for axial securing of the bearing plate in the housing of an electric motor drive are necessary or at least can be reduced. The housing may be made of plastic, for example, wherein the plastic may be additionally formed fiber reinforced. Likewise, the housing may be made of a metal or a metal alloy. In principle, the housing may also be made of a combination of plastic, including a fiber-reinforced plastic and metal, including a metal alloy, as a metal-plastic housing. In the case of a metal-plastic housing, the ring element has the same or as close as possible temperature expansion coefficient as the region of the housing in which the ring element is received and with which the ring element comes into contact.

In an embodiment according to the invention, the ring element is received on the outer circumference of the end shield in at least one receptacle, molded on the end shield and / or glued. The receptacle may be formed, for example, as a groove or step, wherein the invention is not limited to these examples.

In another embodiment of the invention, an electric motor drive is provided, which has a housing with a rotor and a stator, wherein a rotor shaft of the rotor is mounted in a bearing plate system, which is accommodated in the housing. In this case, the stator has at least one contact pin with a guide device for inserting the contact pin into a passage of the contact dome of the bearing shield system. The guide device has the advantage that the contact pin held or guided and can be additionally protected against unwanted bending.

According to one embodiment of the invention, the guide device is formed corresponding to the contour of the implementation of the contact dome that the contact pin can be inserted into the implementation and in an end position in the contact dome is arranged to contact the contact pin on the outlet side of the contact dome. The guide device has the advantage that it forms a plug connection with the passage in the contact dome, whereby the assembly can be additionally simplified.

In a further embodiment of the invention, the guide device is for example conical and / or cylindrical, to be received in a corresponding thereto conical and / or cylindrical portion of the implementation of the contact dome.

According to another embodiment of the invention, the end shield is pressed or shrunk into the housing. The bearing plate provided with a ring element is pressed or shrunk into the housing, for example, with its ring element on the outer circumference. This can be dispensed with an axial securing of the bearing plate by means of additional security elements.

The above embodiments and developments can, if appropriate, combine with each other as desired. Further possible refinements, developments and implementations of the invention also include combinations, not explicitly mentioned, of features of the invention described above or below with regard to the exemplary embodiments. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

CONTENT OF THE DRAWING

The present invention will be explained in more detail with reference to the exemplary embodiments indicated in the schematic figures of the drawings. It shows:

1 a sectional view of a housing in which a bearing plate according to an embodiment of the invention, and a rotor and stator of an electric motor drive are arranged;

2 a perspective view of the bearing plate according to 1 ;

3 a perspective view of a bearing shield system according to an embodiment of the invention;

4 a sectional view AA- of the end shield system according to 3 ;

5 a perspective view of a bearing shield system according to an embodiment of the invention seen from the front, wherein contact pins of a stator are accommodated in Kontaktdomen the bearing shield system;

6 a perspective view of a bearing shield system according to another Embodiment of the invention seen from the rear or engine side;

7 a sectional view of the bearing shield system according to 6 and a stator having a contact pin with a guide means, the contact pin being shown upon insertion into the associated contact dome of the endshield system; and

8th the bearing shield system and the stator according to 7 , Wherein the contact pin is completely inserted into the contact dome of the bearing shield system.

The accompanying drawings are intended to provide further understanding of the embodiments of the invention. They illustrate embodiments and, together with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the stated advantages will become apparent with reference to the drawings. The elements of the drawings are not necessarily shown to scale to each other.

In the figures of the drawing are the same, functionally identical and same-acting elements, features and components - unless otherwise stated - each provided with the same reference numerals.

DESCRIPTION OF EMBODIMENTS

The present invention and the problem underlying it, although applicable to any motors and shaft units, will be explained in more detail below with reference to an electric motor drive in a motor vehicle.

Electromotive drives, such as AC motors and DC motors, usually have a bearing plate for receiving a bearing. This refers to a bearing plate in particular the front and / or rear covers of a housing of the electromotive drive, which protects the motor interior and each receiving a bearing of the motor shaft.

In 1 is a sectional view of a housing 1 and a bearing shield received therein according to an embodiment of the invention. The position of the electric motor drive 3 with his rotor 4 and stator 5 is in 1 purely schematically and greatly simplified indicated by a dashed line. 2 also shows the bearing plate 2 according to 1 in a perspective view.

As in 1 is shown, the bearing plate has 2 on the opposite side of the engine or front bearing storage 6 for a bearing for supporting the rotor shaft 27 of the rotor 4 on which forms the motor shaft. Inside the stator 5 is designed as an internal rotor rotor 4 separated by an air gap. On the side of the motor or rear side of the end shield 2 in turn, the contacting of the engine, for example, with a direction indicated by a dotted line electronic control unit (ECU) 28 , Contacting the control unit (ECU) 28 takes place on the page that is shown open.

In the in the 1 and 2 the embodiment shown is the bearing plate 2 formed of plastic, wherein the plastic may be additionally fiber reinforced in a further embodiment. For example, the end shield 2 be made here as a plastic injection molded part or fiber reinforced plastic injection molded part. On the outer circumference 7 or outer diameter of the end shield 2 is also an additional ring element 8th provided, which has the same temperature expansion coefficient as the housing 1 or the material of the housing 1 or a coefficient of thermal expansion of the housing 1 or the material of the housing 1 having the closest possible coefficients of thermal expansion. The housing 1 For example, may be formed as a metal housing made of metal or a metal alloy as a material. Likewise, the housing 1 be designed as a plastic housing made of a plastic or a fiber-reinforced plastic as a material.

Furthermore, a metal-plastic housing is also possible, in which the housing is made of a combination of metal, including a metal alloy, and plastic, including a fiber-reinforced plastic. In the case of a metal-plastic housing, the ring element has the same or as close as possible temperature expansion coefficient as the portion of the housing, in which the ring member is received and with which the ring element comes into contact. If the ring element comes into contact, for example, with a plastic section of the housing in the assembled state, the coefficient of thermal expansion of the ring element is equal to the coefficient of thermal expansion of this plastic section or comes as close as possible to the temperature expansion coefficient of the plastic section. This applies to all embodiments of the invention. However, the invention is not limited to a metal housing, a plastic housing or a metal-plastic housing and may be made of any other material or combination of materials be made, which or which for a housing 1 an electric motor drive is suitable.

The ring element 8th For example, may be formed as a metal ring member made of metal or a metal alloy and has the same or one of the temperature expansion coefficient of the housing 1 or material of the housing 1 as closely as possible temperature expansion coefficient. This has the advantage that in all the operation of the electric motor drive 3 occurring temperature levels no additional securing elements for axial securing of the bearing plate 2 in the case 1 necessary. In principle, however, it is possible, although not required, to provide additional axial securing elements.

The bearing plate 2 , like in the one in the 1 and 2 shown embodiment, with at least one recording 9 on its outer circumference 7 for receiving the ring element 8th be educated. The recording 9 can, for example, as an at least partially encircling stage 10 as in the embodiment in 1 is shown, or, as in 1 is additionally indicated by a dotted line, as an at least partially circumferential recess or groove 11 be formed, for receiving the ring element 8th , The ring element 8th forms with the case 1 a fit, especially a press fit.

Furthermore, the ring element 8th additionally or alternatively on the outer circumference 7 of the end shield 2 glued or be sprayed on this. In this case, the provision of at least one additional recording 9 in the form of a step 10 or a depression, such as. B. a groove 11 , not mandatory. However, it can have at least one additional shot 9 be provided. The invention is based on the mentioned examples for fastening the ring element 8th on the outer circumference 7 of the end shield 2 not limited. Any type of attachment or combination of fasteners suitable for the ring element may be provided 8th on the bearing plate 2 to fix.

In the in 1 greatly simplified sectional view of the housing 1 and the bearing shield system, is a press fit between the housing 1 and the bearing plate received therein 2 with its ring element 8th intended. Due to the material pairing of housing 1 and ring element 8th in terms of a very similar thermal expansion coefficient prevents the bearing plate 2 in the case 1 can unintentionally loosen due to temperature fluctuations.

By forming the end shield 2 For example, as a plastic injection-molded part or as a fiber-reinforced plastic injection molded part, a high flexibility in the geometric shape and thus a great design freedom can be provided, in contrast, for example, to deep-drawn bearing plates. The shape of such a plastic bearing plate 2 is variable and it can in this case a contour can be realized for example with and without flanges or Flange ears. Flanges or Anflanschohren (not shown), for example, in the housing 1 be integrated and used as an interface to the steering system or the like. If the flanges or flare pipes are not integrated in the housing, they can also be integrated into the end shield (not shown). The housing then serves in this case, for example, only as a pot for Statoraufnahme and bearings for the rotor.

Furthermore, commercial advantages in material and manufacturing costs can be achieved. Thus, in contrast to an aluminum die-cast part, a plastic injection-molded part usually requires no reworking, depending on the particular application. Depending on the particular application, the narrow tolerances that can be produced, for example in plastic injection molding, can be accurate enough to allow the parts to be produced without any reworking. The accuracy of the parts, as well as the damping properties of plastic or fiber-reinforced plastic offer advantages in the structure-borne noise of the engines and enable optimized vibration behavior. In addition, a plastic or fiber-reinforced plastic injection-molded part is easier and leads to a weight saving in the electric motor drive.

In contrast to conventional plastic bearing plates, in which additional security elements are necessary due to the thermal expansion coefficient, in the bearing plate according to the invention 2 on the outer diameter or outer circumference 7 the additional ring element 8th with a same or the housing 1 or material of the housing 1 provided as closely as possible temperature expansion coefficient.

With respect to the 1 and 2 described bearing plate 2 can additionally be provided with an insulating element and form a bearing shield system, as described below with reference to 3 to 8th is explained in more detail.

In 3 is a perspective view of a bearing shield system according to an embodiment of the invention and shown in FIG 4 a sectional view AA of the end shield system according to 3 , The end shield may for example consist of a conductive base material and here is for example a deep-drawn steel bearing plate.

As in 3 is shown, the bearing shield system has a bearing plate 2 with one or more openings 12 , for introducing a mounting device, such. B. a gripper on. The openings 12 serve to engage by the mounting device, for example, from the front or the motor side opposite side of the bearing plate 2 out during the assembly process. The mounting device, such as. As the gripper, detects the bearing plate 2 For example, in an associated housing, as exemplified above 1 shown is to position. In this case, the bearing plate 2 on the front or the opposite side of the engine, a bearing mount 6 for a bearing for supporting the motor shaft. On the side facing the motor or rear side of the bearing plate 2 In turn, the connection of the engine is done for example with an electronic control unit (ECU), not shown. The contact to the control unit (ECU) takes place on the open side of the housing.

Through the openings 12 in the bearing plate 2 can unintentionally get dirt particles. To prevent this, as in 3 and 4 is shown, an additional isolation element 13 intended. The isolation element 13 is formed, the openings 12 on the one hand to cover against the ingress of dirt and on the other hand gripping the bearing plate 2 by a mounting device, such. As a gripper, or other transport and / or positioning allow. Here, the isolation element 13 both on the motor side or on the back on the bearing plate 2 or on the opposite side or the front of the bearing plate 2 be provided to form the bearing shield system.

As in the embodiment in 3 and 4 is shown, the insulating element 12 in the area of the openings 12 of the end shield 2 corresponding depressions 14 on, which are designed such that z. B. a mounting device, not shown, such. As a gripper, etc., in the openings 12 introduced and the bearing plate 2 can be detected by the mounting device. At the same time, the depressions close 14 of the insulation element 13 the openings 12 , in particular completely, and thus prevent dirt from entering through the openings 12 can pass to the motor side or back and vice versa. In this way, very easily an unwanted contamination of electronic devices such. As the electronic control unit (ECU), and the engine by the migration of dirt particles from the engine to the electronic control unit (ECU) and vice versa are prevented. Furthermore, for example, in combination with a suction process, the contact point to the customer's electronic control unit (ECU) can be kept free of critical particles.

In the in 3 and 4 embodiment shown are the wells 14 for covering the respective openings 12 formed without an undercut. In another embodiment, not shown, the respective recess may, however, also be formed with at least one additional undercut, depending on the function and purpose. By means of such an undercut, for example, the gripping of the bearing plate 12 by means of a mounting device, such as a corresponding gripper, or other transport and positioning device, etc. are additionally improved.

At the in 3 and 4 shown embodiment are further openings 15 in the bearing plate 2 for carrying contact pins in the end shield 2 intended. Such contact pins can z. B. as a flat conductor tracks or wire-shaped or cylindrical, as in the following 5 is shown. However, the invention is not limited to the mentioned examples of forms of the contact pins.

The isolation element 13 can be used to close the openings 15 and for performing the contact pins with additional contact domes 16 be provided. The respective contact dome 16 has one or more bushings 17 for one or more contact pins and on the other hand closes the associated opening 15 in the bearing plate 2 , in particular, substantially completely, so that no dirt particles through the opening 15 can pass through. Through the insulation element 13 Customer cleanliness requirements can be met more easily. With this concept, it is possible to focus only on the dirt particles on the outside of the engine. The cleanliness requirements in the engine can be adjusted to the engine.

The isolation element 13 For example, as a plastic part, for. B. of polyamide (PA) or other suitable plastic or plastic combination, to the end plate 2 sprayed, on the bearing plate 2 be glued and / or attachable, etc. be formed. As previously described, the isolation element 13 on the motor side or rear side on the bearing plate 2 be attached as in 4 and 5 is shown, or on the opposite side or front of the bearing plate 2 , On the insulation element 13 Optionally, additionally one or more handling geometries, not shown, may be attached and / or one or more guide geometries (not shown) for customer contacts in the isolation element 13 to get integrated. Under a handling geometry is a To understand element of the component, which is used specifically for gripping or detecting the component. The guide geometries for contacts in turn serve as a guide for the contact and / or as a receptacle for the mutual connector element.

The bearing plate 2 is in the embodiment in 3 and 4 For example, a metal sheet, for. As a steel sheet, etc., which is deep-drawn or made by another suitable method. Likewise, the bearing plate z. B. also be produced as a casting, for example, aluminum die-cast, or as a plastic part. As a plastic part, the end plate can be additionally formed as a fiber-reinforced plastic part. In the case that the bearing plate is designed as a plastic part or fiber-reinforced plastic part, this, as previously with reference to the 1 and 2 has been described, be provided with the additional ring element on the outer circumference. In this case, the bearing plate 2 as a separate component, as in 3 and 4 illustrated, or integral with the insulating element 13 be formed, for example, as a molded part. To avoid unnecessary repetition is with respect to the training of the bearing plate 2 with a ring element on the comments on the 1 and 2 directed.

In the 5 and 6 is another embodiment of a bearing shield system according to the invention 2 each shown in a perspective view, wherein 5 the bearing shield system 2 from the front and 6 the bearing shield system 2 from the motor side or rear. The 7 and 8th again show a section of the bearing shield system 2 according to the 5 and 6 wherein insertion of a contact pin 18 is shown.

The contact unit of an EPS motor is more or less rigidly connected to a stator or a stator assembly. Thus, the positional accuracy of contact pins forming the electrical interface is subject to a very long tolerance chain with respect to the alignment characteristics of the motor on the housing. In particular, the radial and tangential position or angular position of the contact pins is subject to a very large variance.

That in the 5 to 8th bearing shield system shown 2 according to one embodiment of the invention, as in the above 3 and 4 shown bearing shield system according to another embodiment of the invention Kontaktdome 16 on. The contact dome 16 are thereby by assigned openings 15 in the bearing plate 2 passed and preferably additionally close, as the Kontaktdome 16 in the second embodiment, the openings 15 , so no dirt particles through the openings 15 can pass through. The contact dome 16 of the insulation element 13 each have one or more bushings 17 for passing contact pins 18 on.

The bushings 17 the contact dome 16 according to the second embodiment of the invention, as previously in 3 and 4 shown, for example, slit-shaped for performing a contact pin in the form of a flat conductor track. Likewise, the bushings 17 Also be designed as a cylindrical bore for passing a wire-shaped or cylindrical contact pins 18 , as in 5 is shown.

In the embodiment of the invention as shown in the 5 to 8th is shown, the bushings of the contact dome 16 unlike in 3 and 4 shown embodiment additionally with a catch and Führgegsgeometrie 19 designed for receiving or trapping or threading a contact pins 18 and guiding the contact pin 18 in a predetermined end or contacting position. By means of the contact dome 16 and its execution 17 becomes the contact pin 18 also held or supported in its final position for subsequent contacting.

In the in the 5 to 8th Shown embodiment, the bearing shield system with its bearing plate 2 , as before, the bearing shield system with its end shield in the 4 and 5 with an insulation element 13 educated. The contact dome 16 are doing on the insulation element 13 provided, which, as previously with reference to the 3 and 4 was described on the end shield 2 z. B. molded, plugged, glued or can be formed integrally with this from the same material. With regard to the configuration of the insulation element 13 and the cover of the openings 12 in the bearing plate 2 through assigned depressions 14 of the insulation element 13 will be on the description to the 3 and 4 referenced to avoid unnecessary repetition.

As in the 6 . 7 and 8th shows a respective implementation 17 a contact dome 16 as catch and guide geometry 19 a tapered opening 20 on which is from an introductory page 21 of the contact dome 16 at which the contact pin 18 is inserted or threaded longitudinally along at least a portion to an exit side 22 at which the contact pin 18 from the contact dome 16 exit, rejuvenated. This has the advantage that the insertion of the contact pin 18 simplified and on the other hand can be ensured that the contact pin 18 at a defined or predetermined position on the contact dome 16 emerge and can be contacted electrically.

The passage may be formed, for example, as a continuous conical opening. Furthermore, the implementation 17 also as an opening 22 as in the sectional views in the 7 and 8th is shown by way of example, with a conical or conical section 23 on the introductory page 21 and a subsequent cylindrical section 24 be educated. Likewise, the opening may also be partially cylindrical and be provided with at least one additional slope in the longitudinal direction, wherein the slope on the introduction side 21 begins and extends at least over a partial length of the opening. However, the invention is not limited to the mentioned geometries for the implementation, it can be provided any geometry that is suitable for threading a contact pin 18 on the introductory page 21 of the contact dome 16 to facilitate and contact pin 18 to a predetermined end position on the exit side 22 of the contact dome 16 respectively.

As in the sectional views in 7 and 8th can be shown in one embodiment of the invention, in addition, the contact pins 18 of the stator 5 or the stator unit with a guide device 25 be provided. The management device 25 the contact pins 18 is designed in this way, the contact pin 18 in the on the bearing plate 2 provided contact dome 16 introduce. The shape of the guide device 25 is for insertion into the opening 22 of the contact dome 16 suitably corresponding to the shape of the opening 22 or implementation 17 of the contact dome 16 educated. In the in 7 and 8th embodiment shown is the guide device 25 conical or conical, for example, in the conical or conical section 23 the implementation 17 of the contact dome 16 recorded and optionally held in addition. In this case, the guide device 25 with the inner wall or a section of the inner wall of the bushing 27 z. B. form a clearance fit or a Überganspassung so that the position tolerance of the contact pins 18 can be restricted.

In 7 is the contact pin 18 with his leadership facility 25 in a position when inserted into the bushing 17 of the contact dome 16 shown. 8th again shows the contact pin 18 in its final position in the contact dome 16 ,

The management device 25 is optionally additionally designed such, the contact pin 18 to hold or support in a predetermined orientation, for example in the longitudinal direction of the stator 5 or the stator unit. The management device 25 Can be attached to a lid or housing of the stator 5 or the stator arranged and injection molded on this example, glued, or formed with this as injection molding or as in the in 7 and 8th shown embodiment part of a circuit unit 26 of the stator 5 be. The invention is not limited to these examples.

The contact pin 18 and the contact dome 16 form the contact unit, which is also the interface to the ECU. The interconnection unit according to the invention 26 has a much higher flexibility in the tangential and radial directions. In the assembly process of the motor follows, after which the stator 5 as assembly is inserted into the housing, the mounting of the bearing plate 2 , This bearing plate 2 can be added relatively precisely in the motor housing.

According to the embodiment of the invention as shown in FIGS 5 - 8th shown, the bearing shield 2 , through which at the end the contact ends or contact pins 18 should protrude through, with the insulation element 13 with the catch and guide geometries described above 19 provided to the contact ends or contact pins 18 when joining the end shield 2 to catch and lead to a defined end position.

The implementation 17 in the contact dome 16 of the insulation element 13 is preferably dimensioned or at the contact pin to be performed 18 adapted so that the contact pin 18 after insertion into the bushing 17 and reaching its final position in the contact dome 16 no migration of dirt particles and the like through the implementation 17 allows or at least substantially prevents. This applies to all embodiments of the invention.

The embodiments for a position correction of the contact pins 18 through the catch and guide geometry 19 of the bushings 17 the contact dome 16 can be applied to different contact pin types. A contact pin, as described above, for example in the form of a flat conductor track, the z. B. to a insulation displacement connector (SKV) can be formed, or as a wire end, z. B. vertical wire end, are used for contacting.

By means of the contact unit, the positional tolerances of the customer interface towards the electronic control unit (ECU) can be improved. Furthermore, the contour of the catch and guide geometry can influence the quality of the wire guide and the joining force, which acts on the end shield and the contact unit.

• 1. Lagerschild für einen elektromotorischen Antrieb (3), wobei das Lagerschild aus Kunststoff oder faserverstärktem Kunststoff hergestellt ist und ein Ringelement an seinem Außenumfang aufweist, wobei das Ringelement (8) denselben Temperaturausdehnungskoeffizienten wie ein Gehäuse (1), in welchem das Lagerschild (2) aufgenommen ist, oder einen dem Temperaturausdehnungskoeffizienten des Gehäuses (1), in welchem das Lagerschild (2) aufgenommen ist, möglichst nahekommenden Temperaturausdehnungskoeffizienten aufweist.
• 2. Lagerschildsystem nach Ausführungsbeispiel 1, wobei das Ringelement (8) an einem Außenumfang (7) des Lagerschilds (2) in wenigstens einer Aufnahme (9) aufgenommen und/oder an dem Lagerschild (2) angespritzt oder aufgeklebt ist, wobei die Aufnahme (9) insbesondere als Nut (11) oder Stufe (10) ausgebildet ist.
• 3. Lagerschild nach Ausführungsbeispiel 1 oder 2, wobei das Ringelement (8) ein Metallring, ein Kunststoffring und/oder ein Metall-Kunststoff-Ring ist.
• 4. Lagerschild nach Ausführungsbeispiel 1, 2 oder 3, wobei das Lagerschild (2) wenigstens eine Öffnung (12) zum Aufnehmen einer Montagevorrichtung und/oder wenigstens eine Öffnung (15Hindurchführen eines Kontakt) zum pins (18) aufweist.
• 5. Lagerschild nach Ausführungsbeispiel 4, wobei ein Isolationselement (13) auf einer Seite des Lagerschilds (2) angeordnet ist, wobei das Isolationselement (13) derart ausgebildet ist die wenigstens eine Öffnung (12) zum Aufnehmen der Montagevorrichtung zu verschließen und ein Aufnehmen der Montagevorrichtung in der verschlossenen Öffnung (12) zu erlauben und/oder wobei das Isolationselement (13) derart ausgebildet ist die Öffnung (15) zum Hindurchführen eines Kontaktpins (18) zu verschließen, wobei das Isolationselement (13) eine Durchführung (17) aufweist zum Hindurchführen des Kontaktpins (18) durch die verschlossene Öffnung (15).
• 6. Lagerschildsystem nach Ausführungsbeispiel 5, wobei das Isolationselement (13) eine Vertiefung (14) unterhalb der Öffnung (12) zum Verschließen der Öffnung (12) und zum Aufnehmen der Montagevorrichtung aufweist, wobei die Vertiefung (14) mit wenigstens einem Hinterschnitt oder ohne einen Hinterschnitt ausgebildet ist.
• 7. Lagerschildsystem nach Ausführungsbeispiel 5 oder 6, wobei das Isolationselement (13) einen Kontaktdom (16) zum Verschließen der Öffnung (15) aufweist, wobei der Kontaktdom (16) eine Öffnung (20) als Durchführung (17) zum Durchführen des wenigstens einen Kontaktpins (18) aufweist.
• 8. Lagerschildsystem nach Ausführungsbeispiel 7, wobei die Öffnung (20) in dem Kontaktdom (16) schlitzförmig ausgebilm Durchführen eines flachen Kontaktdet ist zupins, insbesondere einer flachen Leiterbahn, oder die Öffnung (20) als eine zylindrische Öffnung in dem Kontaktdom (16) ausgebildet ist zum Durchführen eines zylindrischen Kontaktpins, insbesondere eines Leitungsdrahts.
• 9. Lagerschildsystem nach Ausführungsbeispiel 7 oder 8, wobei die Öffnung (20) mit einer Fang- und Führungsgeometrie (19) ausgebildet ist, wobei die Öffnung (20) mit der Fang- und Führungsgeometrie (19) derart ausgebildet ist, an einer Einführungsseite des Kontaktdoms (16) den Kontaktpin (18) aufzunehmen oder einfädeln zu lassen und zu einer definierten Endposition an einer Austrittsseite (22) des Kontaktdoms (16) zum Kontaktieren des Kontaktpins (18) zu führen und vorzugsweise dort zu halten oder zu fixieren.
• 10. Lagerschildsystem nach Ausführungsbeispiel 9, wobei die Fang- und Führungsgeometrie (19) der Öffnung (20) als eine Verjüngung der Öffnung (20) ausgebildet ist, wobei die Öffnung (20) sich von der Eintrittsseite (21) des Kontaktdoms (16) zumindest in einem Abschnitt in Längsrichtung verjüngt, wobei die Fang- und Führungsgeometrie (19) der Öffnung (20) insbesondere als eine Schräge, als ein kegelförmiger oder konischer Abschnitt (23) und einem sich daran anschließenden zylindrischen Abschnitt (24) oder kegelförmig ausgebildet ist.

Further preferred embodiments of the present invention, as previously z. In 1 and 2 shown, indicate:

• 1. end shield for an electromotive drive ( 3 ), wherein the end shield is made of plastic or fiber-reinforced plastic and has a ring element on its outer circumference, wherein the ring element ( 8th ) the same temperature expansion coefficient as a housing ( 1 ), in which the end shield ( 2 ), or one of the temperature expansion coefficient of the housing ( 1 ), in which the end shield ( 2 ), has as close as possible temperature expansion coefficient.
• 2. Bearing shield system according to Embodiment 1, wherein the ring element ( 8th ) on an outer circumference ( 7 ) of the end shield ( 2 ) in at least one receptacle ( 9 ) and / or on the end shield ( 2 ) is sprayed or glued on, the receptacle ( 9 ) in particular as a groove ( 11 ) or level ( 10 ) is trained.
• 3. bearing plate according to embodiment 1 or 2, wherein the ring element ( 8th ) is a metal ring, a plastic ring and / or a metal-plastic ring.
• 4. end shield according to embodiment 1, 2 or 3, wherein the end shield ( 2 ) at least one opening ( 12 ) for receiving a mounting device and / or at least one opening ( 15 Passing a contact) to the pins ( 18 ) having.
• 5. bearing plate according to embodiment 4, wherein an insulation element ( 13 ) on one side of the bearing plate ( 2 ) is arranged, wherein the insulation element ( 13 ) is formed such that the at least one opening ( 12 ) for receiving the mounting device and receiving the mounting device in the closed opening ( 12 ) and / or wherein the insulation element ( 13 ) is formed such the opening ( 15 ) for passing a contact pin ( 18 ), wherein the insulation element ( 13 ) an implementation ( 17 ) for passing the contact pin ( 18 ) through the closed opening ( 15 ).
• 6. bearing shield system according to embodiment 5, wherein the insulation element ( 13 ) a recess ( 14 ) below the opening ( 12 ) for closing the opening ( 12 ) and for receiving the mounting device, wherein the recess ( 14 ) is formed with at least one undercut or without an undercut.
• 7. Bearing shield system according to embodiment 5 or 6, wherein the insulation element ( 13 ) a contact dome ( 16 ) for closing the opening ( 15 ), wherein the contact dome ( 16 ) an opening ( 20 ) as an implementation ( 17 ) for performing the at least one contact pin ( 18 ) having.
• 8. bearing plate system according to embodiment 7, wherein the opening ( 20 ) in the contact dome ( 16 ) Slit-shaped forming a flat Kontaktdet is zupins, in particular a flat trace, or the opening ( 20 ) as a cylindrical opening in the contact dome ( 16 ) is designed for performing a cylindrical contact pins, in particular a conductor wire.
• 9. bearing shield system according to embodiment 7 or 8, wherein the opening ( 20 ) with a catch and guide geometry ( 19 ) is formed, wherein the opening ( 20 ) with the catch and guide geometry ( 19 ) is formed on an introduction side of the contact dome ( 16 ) the contact pin ( 18 ) or thread it to a defined end position on an exit side ( 22 ) of the contact dome ( 16 ) for contacting the contact pin ( 18 ) and preferably to hold or fix there.
• 10. Bearing shield system according to Embodiment 9, wherein the catch and guide geometry ( 19 ) of the opening ( 20 ) as a rejuvenation of the opening ( 20 ) is formed, wherein the opening ( 20 ) from the entrance side ( 21 ) of the contact dome ( 16 ) is tapered in at least a portion in the longitudinal direction, wherein the catch and guide geometry ( 19 ) of the opening ( 20 ) in particular as a bevel, as a conical or conical section ( 23 ) and an adjoining cylindrical section ( 24 ) or cone-shaped.

Although the present invention has been fully described above with reference to preferred embodiments, it is not limited thereto but is modifiable in a variety of ways. The embodiments described above can be combined with each other, in particular individual features thereof.

LIST OF REFERENCE NUMBERS

1

casing

2

end shield

3

Electromotive drive

4

rotor

5

stator

6

bearing seat

7

outer periphery

8th

ring element

9

admission

10

step

11

groove

12

Opening (for mounting device)

13

insulation element

14

deepening

15

Opening (contact pin)

16

contact dome

17

execution

18

contact pin

19

Catch and guide geometry

20

opening

21

Welcome page

22

exit side

23

Conical section

24

Cylindrical section

25

guide means

26

connection unit

27

rotor shaft

28

ECU

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008013402 A1 [0004]

Claims (15)

Bearing shield system for an electromotive drive ( 3 ) comprising: a bearing plate ( 2 ), which has at least one opening ( 12 ) for receiving a mounting device and / or at least one opening ( 15 ) for passing a contact pin ( 18 ), and an insulation element ( 13 ), which on one side of the bearing plate ( 2 ) is arranged, wherein the insulation element ( 13 ) is formed such that the at least one opening ( 12 ) for receiving the mounting device and receiving the mounting device in the closed opening ( 12 ) and / or wherein the insulation element ( 13 ) is formed such the opening ( 15 ) for passing a contact pin ( 18 ), wherein the insulation element ( 13 ) an implementation ( 17 ) for passing the contact pin ( 18 ) through the closed opening ( 15 ). Bearing shield system according to claim 1, characterized in that the insulation element ( 13 ) a recess ( 14 ) below the opening ( 12 ) for closing the opening ( 12 ) and for receiving the mounting device, wherein the recess ( 14 ) is formed with at least one undercut or without an undercut. Bearing shield system according to claim 1 or 2, characterized in that the insulation element ( 13 ) a contact dome ( 16 ) for closing the opening ( 15 ), wherein the contact dome ( 16 ) an opening ( 20 ) as an implementation ( 17 ) for performing the at least one contact pin ( 18 ) having. Bearing shield system according to claim 3, characterized in that the opening ( 20 ) in the contact dome ( 16 ) is slot-shaped for performing a flat contact pin, in particular a flat conductor track, or the opening ( 20 ) as a cylindrical opening in the contact dome ( 16 ) is designed for performing a cylindrical contact pins, in particular a conductor wire. Bearing system according to one of claims 3 or 4, characterized in that the opening ( 20 ) with a catch and guide geometry ( 19 ) is formed, wherein the opening ( 20 ) with the catch and guide geometry ( 19 ) is formed on an introduction side of the contact dome ( 16 ) the contact pin ( 18 ) or thread it to a defined end position on an exit side ( 22 ) of the contact dome ( 16 ) for contacting the contact pin ( 18 ) and preferably to hold or fix there. Bearing shield system according to claim 5, characterized in that the catching and guiding geometry ( 19 ) of the opening ( 20 ) as a rejuvenation of the opening ( 20 ) is formed, wherein the opening ( 20 ) from the entrance side ( 21 ) of the contact dome ( 16 ) is tapered in at least a portion in the longitudinal direction, wherein the catch and guide geometry ( 19 ) of the opening ( 20 ) in particular as a bevel, as a conical or conical section ( 23 ) and an adjoining cylindrical section ( 24 ) or cone-shaped. Bearing shield system according to one of the preceding claims, characterized in that the insulating element ( 13 ) on the end shield ( 2 ) molded on, attached, one-piece made of plastic with this and / or glued, wherein the insulation element ( 13 ) and / or the bearing plate ( 2 ) is made of plastic, fiber reinforced plastic, a metal sheet or a metal casting is or are. Bearing shield system according to one of the preceding claims, characterized in that the bearing plate ( 2 ) made of plastic or a fiber-reinforced plastic on its outer circumference ( 7 ) a ring element ( 8th ) having. Bearing shield system according to claim 8, characterized in that the ring element ( 8th ) the same temperature expansion coefficient as a housing ( 1 ), in which the end shield ( 2 ), or one of the temperature expansion coefficient of the housing ( 1 ), in which the end shield ( 2 ), has as close as possible temperature expansion coefficient, wherein the housing ( 1 ), in particular a metal housing, a plastic housing and / or a metal-plastic housing ( 1 ) and wherein the ring element ( 8th ) is in particular a metal ring or a plastic ring. Bearing shield system according to claim 8 or 9, characterized in that the ring element ( 8th ) on the outer circumference ( 7 ) of the end shield ( 2 ) in at least one receptacle ( 9 ) and / or on the end shield ( 2 ) is sprayed or glued on, the receptacle ( 9 ) in particular as a groove ( 11 ) or level ( 10 ) is trained. Electromotive drive ( 3 ), which a housing ( 1 ) with a rotor ( 4 ) and a stator ( 5 ), wherein a rotor shaft of the rotor ( 4 ) is mounted in a bearing shield system according to one of the preceding claims, which in the housing ( 1 ) is recorded. Electromotive drive according to claim 11, characterized in that the stator ( 5 ) at least one contact pin ( 18 ) with a management device ( 25 ), for insertion of the contact pin ( 18 ) in an opening ( 20 ) for the Contact pin ( 18 ) in the contact dome ( 16 ) of the end shield system. Electromotive drive according to claim 12, characterized in that the guide device ( 25 ) corresponding to the contour of the opening ( 20 ) of the contact dome ( 16 ) is formed such that the contact pin ( 18 ) in the opening ( 20 ) insertable or threadable and in an end position in the contact dome ( 16 ) can be arranged to be contacted there. Electromotive drive according to claim 11 or 12, characterized in that the guide device ( 25 ) is conical, conical and / or cylindrical. Electromotive drive according to one of claims 11 to 14, characterized in that the bearing plate ( 2 ) of the end shield system in the housing ( 1 ) and wherein the end shield ( 2 ) in particular with its ring element ( 8th ) on its outer circumference ( 7 ) in the housing ( 1 ) is pressed or shrunk.

Images