Electric motor, in particular radiator fan motor

Abstract

The invention relates to an electric motor (1) having a motor carrier (4), an electronics compartment (5), a stator (2) which is fastened to the motor carrier (4) and has stator windings (8), and a rotor (3) which surrounds the stator (2), the stator (2) having a stator base body (7) which has an annular base body part (9) and radially outwardly directed stator teeth (10), a coil insulator or winding insulator (12) is arranged on the stator base body (7), the base body part (9) forms a receiving space or mounting space (32) in which a contact pin (16) is arranged, which is or can be in contact with the stator winding (8) and is guided into the electronics compartment (2) via a sealing element (30) in a through-opening (31) of the motor carrier (4), and wherein the stator base body part (9) is connected to the motor carrier (4). The sealing element (30) is mechanically preloaded by means of a stator (2) fastened to the motor carrier (4) or by means of a stator base body (7) and / or by means of a coil insulator or a winding insulator (12).

Description

Technical Field

[0001] The invention relates to an electric motor, in particular a brushless outboard motor, preferably a radiator fan motor of a motor vehicle. Background Art

[0002] Such electric motors usually include a rotor which is supported so as to be rotatable relative to a stationary stator. In brushless electric motors, the stator is provided with a stator winding or a rotating field winding, by means of which a rotating magnetic field is generated by applying an alternating current to the stator winding or the rotating field winding. The rotor is usually equipped with permanent magnets which generate a rotor magnetic field which interacts with the rotating field of the stator.

[0003] In brushless electric motors, the alternating current that is used to feed the stator winding is usually generated by a converter (inverter). In smaller electric motors, the converter is often accommodated together with the associated control electronics in an electronics compartment, which is then integrated into the electric motor or its motor housing. The control electronics (motor electronics) are protected from moisture, so that in such electric motors, which are used in motor vehicles, for example as radiator fan motors, higher requirements are placed on the sealing of the electronics compartment. In addition, the stator winding should be relatively often constructed as a stator base body of a laminated stack consisting of stacked laminations to ensure reliable electrical insulation.

[0004] The brushless electric motor, in particular a radiator fan motor, known from EP 2 852 035 B1 and designed as an inner rotor (motor), comprises a rotor and a motor carrier which are supported in a manner rotatable relative to a stator, the motor carrier comprising an electronics compartment which is sealed or can be sealed with an electronics compartment cover for accommodating converter electronics. The converter electronics comprise a circuit board equipped with passive and active components and with power semiconductors connected in a bridge circuit. The sealing concept of the known electric motor comprises a sealing element which enables the winding ends or connector ends of the rotating field winding on the stator side formed by the coil to be introduced into the electronics compartment in a sealed manner. For this purpose, a sealing element made of a two-component plastic is provided, which comprises a hard sealing component and a sealing component which is softer than a one-piece component.

[0005] In the installed state, the sealing elements with their relatively soft sealing component, which can be designed as a labyrinth seal, are placed in a through-opening which is introduced into the motor carrier in the region of the electronics compartment bottom. The relatively hard support part of the sealing element projects on the carrier side of the motor carrier facing the stator and is inserted axially above the plastic sheathing on the stator side into a receiving pocket introduced therein. In order to reliably seal the winding ends at their exit point from the soft sealing component, sealing sleeves are formed onto the exit point, which sealing sleeves surround the respective winding ends in a sealing manner. Summary of the invention

[0006] The object of the present invention is to specify an electric motor designed as an outer rotor motor, the phase contacts of which are reliably sealed, preferably with sufficient (mechanical) prestressing of the sealing elements or sealing systems used. In particular, as few components as possible should be used or utilized for this purpose.

[0007] This object is achieved according to the invention by the features of claim 1. Advantageous variants, embodiments and improvements are the subject matter of the dependent claims.

[0008] A brushless electric motor, which is designed and arranged, in particular, for a radiator fan motor of a motor vehicle and is implemented as an outboard motor, comprises: a particularly plate-shaped or plate-shaped motor carrier (motor carrier plate), the motor carrier having an electronics compartment for accommodating electronic components (converter electronics); and a stator fastened to the motor carrier, in particular screw-fastened, and a rotor surrounding the stator.

[0009] The rotor expediently has a pot-shaped rotor housing, on the annular wall or housing wall of which the permanent magnets are arranged on the inner wall side. The rotor is supported rotatably about a motor axis, which is preferably fastened as a rigid rotating shaft, for example as a rigid rotating bolt, for example cast in a motor carrier or injected into the motor carrier.

[0010] The stator of an electric motor implemented as an external rotor motor is arranged on the carrier side of the motor carrier facing away from the electronic device compartment. The stator is preferably fastened to the motor carrier, for example, screwed to this motor carrier. The stator has a stator base body, which is preferably implemented as a laminated stack consisting of stacked stator sheets or laminations. The stator or its stator base body has a preferably annular base section and stator teeth arranged on the outside of the ring and pointing radially outward. The coils of the stator winding (rotating field winding) are arranged on these stator teeth with at least one coil insulator or winding insulator as an intermediate layer. In the embodiment of the stator base body composed of laminations, these laminations are basically formed by sheet rings, which have tooth laminations shaped on the outer peripheral side and oriented in a star shape.

[0011] On the side of the stator facing the motor carrier, or on the side of the stator facing the motor carrier and the side facing away from the motor carrier, a coil insulator or winding insulator is arranged on its stator base body. The coil insulator or winding insulator arranged on the stator base body of the stator on the side of the stator facing the motor carrier is also referred to as the lower coil insulator or winding insulator in the following. The coil insulator or winding insulator arranged on the stator base body of the stator on the side of the stator facing away from the motor carrier is also referred to as the upper coil insulator or winding insulator in the following.

[0012] The annular base part of the stator base body forms a receiving space or installation space, in which a certain number of axially oriented contact pins are arranged, which are in contact with or can be in contact with the stator winding. These contact pins are guided into the electronics compartment via a sealing element, wherein the sealing element is inserted into a through-opening of the motor carrier. The contact pins form phase connections that lead to the motor electronics and are used to energize the stator winding in a suitable manner. Three such contact pins are preferably provided for a three-phase stator winding.

[0013] The sealing element is mechanically prestressed by means of the stator base body and / or by means of the preferably provided coil insulation or winding insulation. In other words, the sealing element is mechanically prestressed by means of the stator fastened to the motor carrier. Thus, no additional components or structural elements are required for the mechanical prestressing of the sealing element provided for the (phase) contact pins, which saves costs in particular.

[0014] The stator base body preferably has radial webs on an annular base body part which are aligned with the respective through-openings of the motor carrier, wherein the respective radial web pointing radially inwards has a through-opening for the associated contact pin. The radial webs can be used directly or indirectly via the coil insulation or winding insulation to (mechanically preload) sealing elements for the contact pins.

[0015] The radial webs are particularly preferably formed (only) by a certain number of laminations of the stator base body, which number is less than the total number of laminations of the stator base body. Such web sections are formed, for example, at 10% to 40%, preferably 15% to 30%, particularly preferably 20% of the consecutive laminations, which web sections form the respective radial webs for the corresponding contact pins in the lamination stack (laminated core) of the stator base body.

[0016] In an advantageous embodiment, the coil insulator or winding insulator has a number of axially raised insulating projections corresponding to the number of contact pins, which project into the receiving space or installation space formed by the annular base part of the stator base body and are penetrated by the respective contact pin. The insulating projections of the (lower) coil insulator or winding insulator are expediently assigned to the radial webs of the stator base body and are seated in their through-openings.

[0017] The insulating projection is formed in a suitable manner on the radially inwardly directed webs of the (lower) coil insulator or winding insulator. For this purpose, the coil insulator or winding insulator has in particular an inner ring, onto which webs are formed that protrude into the installation space or receiving space. In the installed state, the webs of the (lower) coil insulator or winding insulator preferably bear on the one hand against radial webs arranged on the annular base part of the stator base body and on the other hand directly or via a hollow cylindrical formed part bear on the associated sealing element.

[0018] According to another advantageous design, the through-opening of the motor carrier, which is provided for accommodating a sealing element for a contact pin, has a conical or circular cone (truncated cone) opening section which tapers toward the electronics compartment. The respective sealing element additionally or alternatively has a certain number of radial ribs and / or a conical or truncated cone shape on the outer circumference. The sealing element is configured to be conical or truncated cone in a suitable manner. In the respective through-opening of the motor carrier, a cylindrical opening section is connected to the conical or circular cone opening section in a suitable manner. Preferably, the sealing element can have a shape that matches it.

[0019] The contact pins are expediently contacted, for example welded, with connection contacts, in particular busbar-like, which are connected in an appropriate manner to the winding heads or winding collars of the stator winding in an electrically conductive manner.

[0020] Particularly preferably, the stator is fastened to the motor carrier by means of fastening elements, such as screws, thereby simultaneously producing a preload acting on or for the sealing element through which the contact pin passes. The stator base body has in a suitable manner a fastening tab on the annular base part, which protrudes into the receiving space or the installation space and has a through opening for the fastening element. The fastening tab with the through opening for the fastening element is preferably also formed by the laminations of the stator base body, in particular all the laminations in the laminated stack.

[0021] The motor carrier preferably has a sealing wall or a receiving groove and / or a sealing groove that is axially raised with respect to the motor axis on the carrier side assigned to the electronic device compartment. The electronic device compartment cover that closes the electronic device compartment has a cover bottom and a cover wall portion formed at the cover bottom and axially oriented with respect to the motor axis, and the cover wall portion preferably forms at least one bonding gap or sealing groove for accommodating a potting compound (sealing compound) that seals the electronic device compartment together with the sealing wall of the motor carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Next, embodiments of the present invention will be explained in more detail with reference to the accompanying drawings, wherein:

[0023] Figure 1The exploded view shows a brushless electric motor in an outer rotor embodiment, which has a rotor, a stator with a stator winding (rotating field winding), a motor carrier, and (phase) contact pins which are introduced in a sealed manner through the motor carrier into an electronics compartment for motor electronics (converter electronics).

[0024] Figure 2 The cross-sectional diagram shows Figure 1 Electric motor;

[0025] Figure 3 A detail of the stator of an electric motor with its stator base body having radially outwardly pointing stator teeth and coils of a stator winding arranged on the stator teeth (without upper coil insulation) is shown, with a view of the three connecting contacts and the (phase) contact pins contacting therewith;

[0026] Figure 4 In another viewing direction towards the contact pins and with regard to the radial webs of the stator base body through which the contact pins penetrate, a detail is shown with the upper coil insulation according to Figure 3 stator of an electric motor;

[0027] Figure 5 In the corresponding Figure 4 The figure shows the contact pins in the insulating projection of the coil insulator below the stator base body; and

[0028] Figure 6 Shown on an enlarged scale Figure 2 Segment VI of the present invention, in which the contact pins are guided in a sealed manner through the motor carrier into the electronics compartment.

[0029] Corresponding parts and parameters are provided with the same reference numerals in all the figures. Figure 2 The motor axis (rotor axis) D shown in FIG. Figure 2 The axial direction and radial direction A or R are shown in FIG. DETAILED DESCRIPTION

[0030] exist Figure 1 and Figure 2, an electric motor 1 is shown in an exploded view or sectional view in the embodiment of an external rotor, which is preferably provided and set up as a drive for a radiator fan of a motor vehicle. The electric motor 1 essentially has a stator 2 and a rotor 3 surrounding the stator around an axis of rotation D, and a (plate-like or plate-shaped) motor carrier 4, also referred to as a carrier plate in the following, with an electronics compartment 5, which can be closed with an electronics compartment cover 6. The motor carrier 4 is preferably an aluminum die casting. The electronics compartment cover 6, which is preferably made of aluminum or stainless steel, has a cover bottom 6a and a preferably surrounding cover wall 6b formed on the cover bottom.

[0031] The stator 2 has a stator base body 7 and a stator winding or a rotating field winding 8. The stator base body 7 is preferably composed of a plurality of laminated sheets 40 ( Figure 3 The stator 2 or its stator base body 7 has an annular base part 9 and stator teeth 10 which are formed on the outside of the base part and point radially outward.

[0032] Coil insulators or winding insulators 11, 12 are arranged on both sides of the stator base body 7 or the laminated core, which are also referred to below as the upper coil insulator 11 facing away from the motor carrier 4 and the lower coil insulator 12 facing the motor carrier 4. The coil insulators 11, 12, which are preferably made of plastic, for example, are produced as injection molded parts, respectively cover the stator base body 7, in particular the stator teeth 9, at the stator side or on the stator side. The coil insulators 11, 12 are designed in a star shape according to the orientation of the stator teeth 10 with an inner radius that matches the hollow cylindrical shape of the receiving space or installation space 32. The stator base body 7 of the stator 2 covered with the coil insulators 11, 12 is equipped with a stator winding 8, which is preferably composed of coils 13 interconnected with each other, which are in turn wound onto the individual stator teeth 10.

[0033] exist Figure 1 In the figure, the two coil insulators 11 and 12 are shown separately in order to see them clearly. Figure 2 , the actual installation state of the stator base body 7 provided with coil insulators 11, 12 is shown. The stator base body is located between the coil insulators 11, 12 and is wound with coils 13 of the stator winding 8. The winding collar or winding head 14 of the stator winding 8 is electrically conductively connected to a busbar-like connecting contact 15, which is contacted, for example (laser) welded, to a contact pin 16.

[0034] The motor carrier 4 has, on its carrier side assigned to or facing the stator 2 and the rotor 3, a rigid rotation axis in the form of a pin 17, which is received in a rotationally fixed manner in a Figure 4 The axle pin 17 is for example cast or pressed together in a corresponding bolt receptacle of the motor carrier 4 , which is designated by 43. The axle pin 17 forms a rotation axis or motor axis D of the electric motor 1 or the rotor 3 to a certain extent.

[0035] On the carrier side facing away from the stator 2 and the rotor 3, an electronics compartment 5 for the motor electronics 18 is arranged in the motor carrier 4. The electronics compartment 5 opens at the end into a plug compartment 20, which in the exemplary embodiment is provided for connecting to the connecting cables 19 ( Figure 2 ) are placed or can be placed in the plug compartment. In the installed state of the electric motor 1, the electronics compartment 5 is sealed with an electronics compartment cover 6, in particular moisture-tight.

[0036] The rotor 3 has a pot-shaped rotor housing 23 with a housing bottom 23a and a housing wall (annular wall or housing wall) 23b oriented in the axial direction A. Permanent magnets 24 are arranged on the housing wall on the inner wall side. The rotor housing 23 has a centrally deep-drawn, preferably hollow-cylindrical housing section in the housing bottom 23a as a bearing housing 25 for two rolling bearings or ball bearings 26 axially spaced apart (with respect to the axis of rotation D) in the exemplary embodiment. Their outer rings, not shown in detail, are held in a rotationally fixed manner in the deep-drawn bearing housing 25, and their inner rings, not shown in detail, are firmly connected to the shaft bolt 17, wherein a bearing ball 27 is arranged between the outer ring and the inner ring.

[0037] Mounting elements 28, such as screws, corresponding to the rotor housing 23 are preferably used to fasten a fan wheel (not shown) of a radiator fan to the rotor 3. Fastening elements 29, such as screws or bolts, are provided for fastening the stator 2 to the motor carrier 4.

[0038] As in Figure 2 It can be seen in and Figure 6 As can be seen more clearly in the figure, a cup-shaped or stopper-shaped sealing element 30 is provided for the contact pin 16 in order to seal the contact pin 16 with respect to the motor carrier 4. For this purpose, the motor carrier 4 has a corresponding through-opening 31, in which the sealing element 30, through which the contact pin 16 passes, is arranged in a sealing manner. The contact pin 16 extends into the electronics compartment 5 in order to make contact there with the motor electronics or converter electronics 18. In the exemplary embodiment, a three-phase stator winding 8 is provided, so that three contact pins 16 are provided as phase connections for the stator winding or rotating field winding 8, which are connected to the coils 13 of the stator winding or rotating field winding 8 via connecting contacts 15 as contact elements and are guided to the motor electronics 18 and (electrically) contacted there.

[0039] As in Figure 2 in and especially in Figures 3 to 5As can be seen in the figure, the annular base part 9 of the stator base body 7 forms a receiving space or installation space 32. The shaft bolt 17 oriented in the axial direction A is located in the receiving space or installation space as the rotation axis D of the rotor 3. In addition, the contact pin 16 used as a phase connection element is located in the receiving space 32. In addition, the radial web 33 used as a lead-through of the corresponding contact pin 16 extends into the receiving space 32.

[0040] The radial webs 33 are formed by some of the laminations of the stator base body 7 and have Figure 6 The insulating protrusion or insulating projection 34 preferably extends into the radial web 33 or its through opening 49 in a form-fitting manner ( Figure 6 ). The insulating protrusions 34 are penetrated by the respective contact pins 16. The insulating protrusions or insulating projections 34 are Figure 1 and Figure 2 A component of the lower middle coil insulation 12 , ie preferably integrally formed onto the lower coil insulation.

[0041] In addition, observation Figure 1 and Figure 4 At least one further fastening web or radial web 35 is formed by the stator base body 7 of the stator 2 or its laminated core, which projects into the receiving space 32. The fastening web or radial web 35 has a through-opening 42 ( Figure 4 ) and is used together with the fastening element to hold, in particular screw-fasten, the stator 2 on the motor carrier 4.

[0042] The electronics compartment 5 is surrounded by an axially raised sealing wall 36. The carrier-side sealing wall 36 has a receiving groove 37. In the installed state, the preferably circumferentially closed cover wall 6b of the electronics compartment cover 6 is embedded in the carrier-side receiving groove 37. In other words, the electronics compartment cover 6 is placed in the carrier-side receiving groove 37 with its cover wall 6b.

[0043] When the electronics compartment cover 6 is placed in the receiving groove 37, the receiving groove 37 is filled with, for example, an initially liquid or viscous, curable potting compound or sealing compound M. Figure 2 As shown in FIG. 1 , the radially inner plug part 21 forms a boundary wall between the electronics compartment 5 and the plug compartment 20 in the region of the carrier-side sealing groove or receiving groove 37 at the end side of the electronics compartment 5. On the other hand, a plug part-side receiving groove 38 matching the receiving groove 34 on the carrier side is provided in or on the inner plug part 21.

[0044] The receiving groove 38 on the plug part side is flush with the receiving groove 37 on the carrier side and together with the receiving groove forms a surrounding closed receiving groove for the cover wall 6b of the electronics compartment cover 6. The plug compartment 20 is basically wall-free at the end side opposite the inner plug part 21. The radially outer plug part 22 is arranged in the wall recess 39 ( Figure 1 ), thereby forming a plug compartment 20 which is also closed all around.

[0045] Figure 3 The stator 2 of the electric motor 1 is partially shown without the upper coil insulation 11 and with three connecting contacts 15 and the (phase) contact pins 16 contacting therewith, the stator having its stator base body 7 formed by stacked laminations 40, with an annular base part 9 and stator teeth 10 formed on the outer circumference on the stator base part and pointing outward in the radial direction R, and the stator also has coils 13 of the stator winding 8 arranged on the stator teeth. The connecting contact 15 has preferably flexible contact tabs (bending tabs) 41, in or at which the winding collar or winding head 14 is contacted, for example by means of laser welding and / or clamping contact.

[0046] Figure 4 In with Figure 3 In a similar illustration, the stator 2 of the electric motor 1 is shown, looking into the receiving space or installation space 32 and observing three (phase) contact pins 16 in contact with the connecting contacts 15, the stator having a stator base body 7 formed by stacked laminations 40, with coils 13 of a stator winding 8 arranged thereon, and also with an upper coil insulation 11. The fastening webs or radial webs 35 formed by the stator base body 7 or by the laminations 40 of the laminated core or the laminated core are shown, with through openings 42 for fastening elements 29 for holding the stator 2 on the motor carrier (motor carrier plate) 4. Furthermore, the bolt receptacle 43 for the shaft bolt 17 in the motor carrier 4 is shown.

[0047] Figure 4 Also shown is a particularly forked holding or positioning clamp 44, in which or by means of which the contact pin 16 is held or fixed in the desired position for contact at the respective connecting contact 15. The forked clamp 44 is particularly integrally formed on the inner circumference onto the upper coil insulator 11 or onto its inner radius and projects in the radial direction R into the receiving space or installation space 32.

[0048] Figure 4Also shown are radial webs 33 which are arranged on the stator base body 7 or are formed from the laminations 40 of the stator base body and project inwardly into the receiving space or installation space 32 in the radial direction R and have insulating projections or extensions 34 arranged therein. The insulating projections or extensions are formed on radially inwardly directed webs 45 of the lower coil insulation or winding insulation 12. The radial webs 33 are Figure 6 There is a through-opening designated by 49 for the associated contact pin 16 .

[0049] In the installed state, the stator 2 is fastened to the motor carrier 4, in particular screwed to the motor carrier, with a pressing force or a pressing force F ( Figure 6 ) loads the sealing element 30 through which the contact pin 16 passes. The pressing force or pressing force is generated by the stator base body 7 via its radial webs 33 and / or via the coil insulator 12 below or its webs 45 with the formed insulating protrusions 34. The sealing element 30 is thus mechanically preloaded. Therefore, no (additional) structural elements or components are required for this purpose, which saves corresponding costs.

[0050] It can be seen that the radial webs 33 are formed only by a certain number of laminations 40 of the stator base body 7. This number is less than the total number of laminations 40 of the stator base body 7. Such web sections are formed, for example, by 20% of the total number of consecutive laminations 40, which form radial webs 33 for corresponding contact pins 16 in the lamination stack (laminate stack) of the stator base body 7.

[0051] Figure 5 The lower coil insulator 12 is shown, which has its webs 45 which protrude into the installation space 32 and are oriented in the radial direction R. Insulating projections 34 oriented in the axial direction A and thus axially raised are formed on the webs, through which the respective contact pins 16 pass. The coil insulator 12 is formed by an inner ring 46 and a tooth cap 47 formed thereon on the outer circumference and extending outward in a star-shaped manner in the radial direction R for covering the stator teeth 10. The insulating projections 34 and the contact pins 16 passed through them are arranged in radial webs 33 of the stator base body 7.

[0052] Figure 6 In the region of one of the sealing elements, the contact pins 16 for insertion and guidance into the electronics compartment 5 are shown. Figure 2The through-opening 31 of the motor carrier 4, which is provided for accommodating the sealing element 30 for the contact pin 16, has a conical or conical (truncated cone) opening section 31a, which tapers toward the electronics compartment 5. The conical opening section 31a transitions into a (hollow) cylindrical opening section 31b of the through-opening 31 of the motor carrier 4, which opens into the electronics compartment 5.

[0053] The respective sealing element 30 has a number of preferably circumferential, in particular axially spaced radial ribs 48 on the outer circumference. The respective sealing element 30 is preferably designed in a conical or truncated-conical manner. In particular, due to the conical shape or truncated-conical design of the carrier-side through-opening 31 or the sealing element 30 and preferably by means of the radial ribs 48 of the sealing element, a reliable sealing for the contact pin 16 in the manner of a labyrinth seal is achieved.

[0054] The radial webs 33 formed by the stator base body 7 or by the laminations 40 of the stator base body have through-openings 49 in which the insulating projections 34 formed onto the webs 45 of the coil insulation 12 below are arranged in a form-fitting manner. In the illustrated installed state, the webs 45 of the coil insulation or winding insulation 12, on the one hand, abut against the radial webs 33 arranged on the annular base part 9 of the stator base body 7. On the other hand, the webs 45 of the coil insulation or winding insulation 12 abut against the respective sealing element 30 via hollow cylindrical formed parts 50 formed onto the coil insulation or winding insulation in the exemplary embodiment. Thus, the compressive or pressing force F generated by the fastening of the stator 2 to the motor carrier 4 acts on the respective sealing element 30, so that the sealing element is mechanically prestressed in a targeted manner.

[0055] In summary, the present invention relates to an electric motor 1, which comprises: a motor carrier 4, which has an electronic device compartment 5; a stator 2 fastened to the motor carrier 4, which has a stator winding 8; and a rotor 3 surrounding the stator 2, wherein the stator 2 has a stator base body 7, which has an annular base body part 9 and radially outwardly pointing stator teeth 10, wherein a coil insulator or a winding insulator 12 is arranged on the stator base body 7, wherein the base body part 9 forms a receiving space or an installation space 32, and a contact pin 16 that is or can be in contact with the stator winding 8 is arranged in the receiving space or the installation space, and the contact pin is guided into the electronic device compartment 2 via a sealing element 30 in a through opening 31 of the motor carrier 4, and wherein the sealing element 30 is mechanically prestressed by means of the stator 2 fastened to the motor carrier 4 or by means of the stator base body 7 and / or by means of the coil insulator or the winding insulator 12.

[0056] The claimed invention is not limited to the above-described embodiments. Rather, a person skilled in the art can also derive other variants of the invention within the scope of the disclosed claims without departing from the subject matter of the claimed invention. In addition, all individual features described in conjunction with the various embodiments can also be combined in other ways within the scope of the disclosed claims without departing from the subject matter of the claimed invention.

[0057] Furthermore, the described solution can be used not only in the specifically shown application but also in a similar embodiment in other motor vehicle applications, such as door and tailgate systems, window lifts, adjustable seats and interior systems and electric drives.

[0058] Reference numerals list

[0059] 1 Electric motor

[0060] 2 Stator

[0061] 3 Rotor

[0062] 4 Motor carrier / carrier plate

[0063] 5 Electronics compartment

[0064] 6 Electronics compartment cover

[0065] 6a Cover the bottom

[0066] 6b Cover wall

[0067] 7 Stator base

[0068] 8 Stator winding / rotating field winding

[0069] 9 Base part

[0070] 10 stator teeth

[0071] 11 (Upper) coil insulator

[0072] 12 (lower) coil insulator

[0073] 13 Coil

[0074] 14 Winding ring / winding end

[0075] 15 Connecting contact

[0076] 16 Contact pins

[0077] 17 Axle bolt

[0078] 18 Motor electronics / inverter electronics

[0079] 19 Connecting cable

[0080] 20 Plug compartment

[0081] 21 (Inner) plug part

[0082] 22 (Outer) plug part

[0083] 23 Rotor housing

[0084] 23a Shell bottom

[0085] 23b Housing wall / annular wall

[0086] 24 permanent magnets

[0087] 25 Housing section / bearing housing

[0088] 26 Rolling bearings / ball bearings

[0089] 27 Bearing Ball

[0090] 28 Mounting components

[0091] 29 Fastening elements

[0092] 30 Sealing element

[0093] 31 Through opening

[0094] 31a Conical / conical opening section

[0095] 31b Column opening section

[0096] 32 Accommodation space / installation space

[0097] 33 Radial tabs

[0098] 34 Insulation protrusion / insulation projection

[0099] 35 Fastening tabs / radial tabs

[0100] 36 Sealing wall

[0101] 37 Receiving slot (on the carrier side)

[0102] 38 Receiving groove (on the plug part side)

[0103] 39 Wall Vacancy

[0104] 40 stacking

[0105] 41 Contact tab / bend tab

[0106] 42 Through opening

[0107] 43 bolt receiving portion

[0108] 44 Retaining clip / locating clip

[0109] 45 splice

[0110] 46 Inner Circle

[0111] 47 tooth cover

[0112] 48 Radial ribs

[0113] 49 Through opening

[0114] 50 Forming part

[0115] A Axial direction

[0116] D Motor axis / rotation axis

[0117] F (squeeze / press) force

[0118] M Potting / sealing material

[0119] R Radial direction

Claims

1. An electric motor (1), in particular a radiator fan motor for a motor vehicle, comprising: a motor carrier (4) having an electronics compartment (5) for accommodating motor electronics (18); a stator (2) fastened to the motor carrier (4), the stator having a stator winding (8); and a rotor (3) which surrounds the stator (2) about an axis of rotation (D), - in, The stator (2) has a stator base body (7) having an annular base part (9) and stator teeth (10) pointing radially outwards. - wherein a coil insulation or winding insulation (12) is arranged on a stator base body (7) of the stator on the side of the stator (2) facing the motor carrier (4) or on the side of the stator facing the motor carrier (4) and on the side facing away from the motor carrier (4), - wherein the annular base part (9) of the stator base body (7) forms a receiving space or installation space (32), in which an axially oriented contact pin (16) which is or can be in contact with the stator winding (8) is arranged, the contact pin being guided into the electronics compartment (2) via a sealing element (30) in a through opening (31) of the motor carrier (4), and wherein the sealing element (30) is mechanically prestressed by means of a stator (2) fastened to a motor carrier (4) or by means of the stator base body (7) and / or by means of the coil insulation or winding insulation (12).

2. The electric motor (1) according to claim 1, It is characterized in that The stator base body (7) has radial webs (33) on an annular base body part (9) which are aligned with the through-openings (31) of the motor carrier (4) and each have a through-opening (49) for an associated contact pin (16).

3. The electric motor (1) according to claim 1 or 2, It is characterized in that - the stator base body (7) is formed as a lamination stack consisting of a certain number of stacked laminations (40), and The radial webs (33) are formed by a smaller number of laminations (40) than the total number of laminations (40) of the stator base body (7).

4. The electric motor (1) according to any one of claims 1 to 3, It is characterized in that The coil insulator or winding insulator (12) has a number of axially raised insulating projections (34) corresponding to the number of the contact pins (16), which project into a receiving space or installation space (32) formed by an annular base part (9) of the stator base body (7) and are penetrated by the respective contact pins (16).

5. The electric motor (1) according to claim 4, It is characterized in that The insulating projection (34) of the coil insulation or winding insulation (12) is associated with a radial web (33) of the stator base body (7) and is seated in a through-opening (49) of the radial web.

6. The electric motor (1) according to claim 4 or 5, It is characterized in that The insulating projection (34) is integrally formed onto a radially inwardly directed web (45) of the coil insulation or winding insulation (12).

7. The electric motor (1) according to claim 6, It is characterized in that The webs (45) of the coil insulation or winding insulation (12) bear on the one hand against radial webs (33) arranged on the annular base part (9) of the stator base body (7) and on the other hand against an associated sealing element (30) directly or via a shaped hollow-cylindrical shaped part (50).

8. The electric motor (1) according to any one of claims 1 to 7, It is characterized in that - the through opening (31) of the motor carrier (4) provided for receiving a sealing element (30) for the contact pin (16) has a conical or conical opening section (31a) tapering towards the electronics compartment (5), and / or - the respective sealing element (30) has a certain number of radial ribs (48) on the outer circumference, and / or - The respective sealing element (30) is designed in the form of a cone or a truncated cone.

9. The electric motor (1) according to claim 8, It is characterized in that In the respective through-opening (31) of the motor carrier (4), a cylindrical opening section (31b) adjoins the conical or circular cone-shaped opening section (31a).

10. The electric motor (1) according to any one of claims 1 to 9, It is characterized in that The contact pin (16) is contacted, for example welded, with a connecting contact piece (15), in particular a busbar-like piece, which is electrically conductively connected to a winding end or winding collar (14) of the stator winding (8).

11. The electric motor (1) according to any one of claims 1 to 10, It is characterized in that - the stator (2) is fastened to the motor carrier (4) by means of a fastening element (29), such as a screw, thereby simultaneously generating a preload on or for the sealing element (30) penetrated by the contact pin (16), and / or The stator base body (7) has, on the annular base body part (9), a fastening web (35) which projects into the receiving space or installation space (32) and has a through-opening (42) for a fastening element (29).

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