Electric motor, in particular radiator fan motor

Abstract

The invention relates to an electric motor (1) having a motor carrier (4) and a stator (2) fastened thereto and a rotor (3) surrounding the stator (2), coil or winding insulators (11, 12) being arranged at least on the side of the stator (2) facing away from the motor carrier (4), a contact pin (16), which is in contact with a stator winding (8) of the stator via a connection contact (15) and is guided into the carrier-side electronics compartment (2), is arranged in a receiving or mounting space (32) of the stator (2), and wherein the coil insulator or winding insulator (11) has an annular body (11a), functional elements (42, 42a, 42b) for holding, positioning and / or centering the contact pins (16) and / or for coupling the contacts are formed on the annular body.

Description

Technical Field

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

[0002] Such electric motors usually include a rotor which is mounted 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, with which a rotating magnetic field is generated by applying an alternating current to it. 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 provided for supplying the stator winding is usually generated by a converter (inverter). In the case of smaller electric motors, the converter is usually accommodated together with the associated control electronics in an electronics compartment integrated into the electric motor or its motor housing. The control electronics should be protected from moisture, so that in such electric motors, which are installed in motor vehicles, for example as radiator fan motors, relatively high requirements are placed on the tightness of the electronics compartment. In addition, the stator winding should also be reliably electrically insulated from the stator base body, which is usually constructed as a sheet metal stack consisting of stacked sheet metal sheets.

[0004] A 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 mounted so as to be rotatable relative to a stator and a motor carrier, which contains an electronics compartment for accommodating converter electronics and is sealed or closable by means of an electronics compartment cover. The stator with its radially inwardly directed stator teeth is injection-molded over a plastic jacket, on which crimping lugs are formed which extend through fastening openings provided on the motor carrier and are, for example, heat-pressed and deformed during the joining process with the motor carrier manufactured as a cast part.

[0005] The known sealing concept of electric motors includes sealing elements, which enable the winding ends or connection ends of the rotating field winding formed by the coil on the stator side, which serve as the phase connection, 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 as an integral component comprises a hard and a relatively soft sealing component. In the installed state, the sealing element with its relatively soft sealing component is inserted into a through-opening introduced into the motor carrier in the bottom area of ​​the electronics compartment. The relatively hard supporting component of the sealing element protrudes from the carrier side of the motor carrier facing the stator and is inserted axially above the plastic jacket on the stator side into a receiving recess introduced into the plastic jacket. In order to reliably seal the winding ends at their departure position from the softer sealing component, sealing sleeves are formed on the softer sealing component, which sealing sleeves seal the winding ends. Summary of the invention

[0006] It is therefore an object of the present invention to provide an electric motor as an outboard motor in which a reliable positioning, centering, fixing and / or contacting of a contact element used as a phase connection is achieved.

[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 particularly designed and configured for a radiator fan motor of a motor vehicle, comprises a plate-shaped or plate-shaped motor carrier (motor carrier plate) with an electronics compartment for accommodating electronics (converter electronics), a stator, and a rotor surrounding the stator. The rotor has a pot-shaped rotor housing, on the inner wall of which the permanent magnets are arranged on the annular wall or housing wall of the rotor housing. The rotor is supported so that it can rotate about a motor axis or rotation axis, which is preferably fastened in the motor carrier as a rigid rotation axis (e.g. a rigid rotation pin), for example cast therein.

[0009] 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 electronics compartment. The stator has a stator matrix, which is preferably implemented as a sheet metal stack consisting of stacked stator sheets or sheet metal sheets. The stator or its stator matrix has a preferably annular matrix section and radially outwardly directed stator teeth arranged outside the ring, on which the coils of the stator winding (rotating field winding) are arranged. In the embodiment in which the stator matrix is ​​formed by sheet metal sheets, these sheet metal sheets are basically formed by a sheet metal ring with toothed sheets formed on the outer circumferential side and oriented in a star shape.

[0010] The annular base section of the stator base body forms a receiving or installation space, in which axially oriented contact pins are arranged, which are in contact or can be contacted with the stator winding via the connecting contact. These contact pins are guided into the electronics compartment via through-openings of the motor carrier. Advantageously, these contact pins extend over the entire axial spatial length or spatial height of the receiving or installation space, which is formed, in particular, within the stator base body and is surrounded by the base section of the stator base body.

[0011] On the side of the stator facing away from the motor carrier or on the side of the stator facing away from the motor carrier and on the side of the stator facing away from the motor carrier, a coil insulator or winding insulator is arranged on the stator base body of the stator. 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 below. 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 below.

[0012] An upper coil insulation or winding insulation arranged on a stator base body of the stator on the side of the stator facing away from the motor carrier has an annular body and radially outwardly directed tooth caps formed on the (outer) circumferential side of the annular body and at least partially covering the stator teeth.

[0013] According to an advantageous embodiment, the tooth cap of the upper coil insulator or winding insulator has a cap section extending in the plane of the annular body and a side cap section formed on the cap section, which extends radially and is oriented axially. In other words, the side cap section is oriented in the radial direction and extends at least partially or in sections in the axial direction along the side surface of the stator tooth. The annular body preferably has an axially raised annular wall in the region of its inner radius.

[0014] Functional elements for holding, positioning and / or centering contact pins or connecting contacts are formed on the inner side of the annular body (in the region of its inner radius). In a suitable manner, the functional element provided for holding and / or positioning the contact pin is designed in a fork-shaped manner with two radial support protrusions or support elements, between which the contact pins are arranged or supported or rest against them. Preferably, the functional elements for holding and / or positioning the contact pins are formed onto the annular wall of the annular body of the upper coil insulator or winding insulator.

[0015] According to an appropriate manner, the axially raised annular wall of the annular body extending in the axial direction fulfills a dual function. On the one hand, the annular wall is provided with an (axial) plug opening, which is used as a functional element for a connecting contact for contacting a winding ring or a winding end of a stator winding, in particular its coil. On the other hand, a functional element in the form of a radial support protrusion or a support element for holding and / or positioning a contact pin is formed on the annular wall of the annular body of the upper coil insulator or winding insulator. The connecting contact has engagement elements, in particular pins, which correspond to the functional elements of the upper coil insulator or winding insulator and are preferably used to establish a plug connection of the connecting contact with the annular wall or with the upper coil insulator or winding insulator.

[0016] According to a suitable improvement, the contact pins are guided into the electronics compartment via sealing elements in the through-openings of the motor carrier. Suitably, the stator base body has radial tabs aligned with the through-openings of the motor carrier, through which the associated contact pins pass. In particular, it is provided that the lower coil insulator or winding insulator (arranged on the stator base body on the side of the stator facing the motor carrier) has a number of axially raised insulating projections corresponding to the number of contact pins, which extend into the receiving or mounting space of the stator base body and are penetrated by the respective contact pins. For example, in order to fasten the stator to the mounting carrier, the stator base body has radial tabs or fastening tabs extending into the receiving or mounting space, which have through-openings for the fastening elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0018] Figure 1 An exploded view shows a brushless electric motor designed as an external rotor, in particular for use as a radiator fan drive for a motor vehicle, having a rotor and a stator with a stator winding (rotating field winding) and a motor carrier having an electronics compartment for the motor electronics (converter electronics) which can be closed by means of an electronics compartment cover;

[0019] Figure 2 The cross-sectional view shows Figure 1 Electric motor;

[0020] Figure 3 The electric motor is shown without a rotor housing in a top view looking down on the coil insulation;

[0021] Figure 4 A section of a stator of an electric motor is shown, which has an upper coil insulation, wherein the contact pins are arranged in fork-shaped positioning or retaining elements of the (upper) coil insulation, as viewed in the direction of the contact pins;

[0022] Figure 5 The (upper) coil insulator is shown in a perspective top view; and

[0023] Figure 6 The (upper) coil insulation is shown in a perspective bottom or rear view. DETAILED DESCRIPTION

[0024] Corresponding parts and dimensions are provided with the same reference numerals in all the figures. For example, the description of the axial and radial directions is similar to Figure 2 The motor axis (rotation axis) D is related to the motor axis (rotation axis) D indicated in Figure 2 The axial direction drawn in is related to the radial direction A or R.

[0025] Figure 1 and Figure 2 An electric motor 1 designed as an external rotor is shown in an exploded view or sectional view, which is preferably arranged and configured as a drive for a radiator fan of a motor vehicle. In particular, the three-phase (with three phases U, V, W) electric motor 1 mainly has a stator 2 and a rotor 3 surrounding the stator and a motor carrier 4, also referred to as a carrier plate (plate-shaped or plate-shaped) below, which has an electronics compartment 5 that 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 cover wall 6b formed on the cover bottom.

[0026] 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 sheet metal sheets 37 ( Figure 2 and Figure 4 The stator 2 or its stator base body 7 has an annular base part 9 and stator teeth 10 formed on the outside of the base part and pointing radially outward.

[0027] At least a coil insulator 11 is provided, which is arranged on the stator base body 7 of the stator on the side of the stator 2 facing away from the motor carrier 4. In the exemplary embodiment, a coil insulator or winding insulator 11, 12 is provided on both stator sides of the stator base body 7 or the sheet metal stack, 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. These coil insulators 11, 12, which are preferably made of plastic, for example as injection molded parts, respectively cover the stator base body 7 and in particular the stator teeth 10 at or on the stator side. Preferably, the coil insulators 11, 12 each partially span the stator base body 7 or its stator teeth 10. The stator base body 7 of the stator covered by the coil insulators 11, 12 is provided with a stator winding 8, which is preferably constructed of coils 13 interconnected with each other, which are in turn wound onto the individual stator teeth 10 with the coil insulators 11, 12 as sandwich.

[0028] exist Figure 1 In the figure, for the sake of clarity, the two coil insulators 11 and 12 are shown separately. Figure 2 The actual installation of a stator base body 7 provided with coil insulators 11, 12 is shown. The stator base body is wound with coils 13 of a stator winding 8 with the coil insulators 11, 12 as an interlayer. The winding collars or winding ends 14 of the stator winding 8 are electrically conductively connected to busbar-like connecting contacts 15, which are contacted, for example welded, with contact pins 16. The contact pins 16 are or serve as phase contacts of the stator 2 or its stator winding 8.

[0029] The motor carrier 4 has a rigid rotating shaft in the form of a shaft bolt 17 on its carrier side assigned to the stator 2 and the rotor 3, which is injected into the motor carrier 4 or arranged in a rotationally fixed manner (for example cast or pressed) in a bolt receptacle of the motor carrier 4. The shaft bolt 17 largely forms the rotation axis or motor axis D of the motor 1 or the rotor 3.

[0030] On the carrier side facing away from the stator 2 and the rotor 3, an electronics compartment 5 for the motor electronics 18 is provided in the motor carrier 4. The electronics compartment 5 opens at the end into a plug compartment 20, in which, in the exemplary embodiment, a plug compartment provided for connecting to a connection cable 19 ( Figure 3 ) are two plug parts 21 , 22 (inner plug part 21 and outer plug part 22 ) that are in contact with each other. In the installed state of the electric motor 1 , the electronics compartment 5 is sealed by an electronics compartment cover 6 in a sealing manner, in particular in a moisture-tight manner.

[0031] The rotor 3 has a pot-shaped rotor housing 23 having a housing bottom 23a and a housing wall (annular wall, 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 housing section deep-drawn in the housing bottom 23a and preferably in the form of a hollow cylinder 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. The outer ring of the rolling bearing or ball bearing, which is not designated in detail, is held in a rotationally fixed manner in the deep-drawn bearing housing 25, and the inner ring of the rolling bearing or ball bearing, which is not designated in detail, is firmly connected to the shaft bolt 17, wherein a bearing ball (bearing element) 27 ( Figure 2 ).

[0032] Mounting elements 28, such as screws, corresponding to the rotor housing 23 are used to fasten the impeller (not shown) of the radiator fan to the rotor 3. Further fastening elements 29, such as screws or bolts, are shown to fasten the stator 1 to the motor carrier 4.

[0033] Furthermore, cuff-like or cork-like sealing elements 30 can be seen for the contact pins 16 in order to seal them off relative to the motor carrier 4. For this purpose, the motor carrier 4 has corresponding through-openings 31 ( Figure 2 ), sealing elements 30 are inserted into these through-openings in a sealing manner through which the contact pins 16 pass. The contact pins 16 extend 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 of 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.

[0034] like Figure 2 It can be seen that the annular base part 9 of the stator base body 7 forms a receiving or installation space 32. The shaft bolt 17 oriented in the axial direction A is located in the receiving or installation space as the rotation axis D for the rotor 3. In addition, the contact pin 16 serving as a phase connection is also located in the receiving space 32. In addition, radial webs 33 serving as penetrations for the respective contact pins 16 extend into the receiving space 32. The radial webs are formed by some of the sheet metal sheets 37 of the stator base body 7. The insulating protrusions or insulating projections 34 preferably extend into the radial webs 33 or the through-openings of the radial webs in a form-fitting manner, and the respective contact pins 16 pass through the insulating protrusions or insulating projections 34. The insulating protrusions or insulating projections 34 are preferably Figure 1 and Figure 2The lower coil insulator 12 is a component of the lower coil insulator 12, that is, it is preferably formed on the lower coil insulator.

[0035] observe Figure 1 , at least one further radial web 35 is formed by the stator base body 7 of the stator 2 or the sheet metal stack of the stator, which projects into the receiving space 32. The radial web 35 has a through opening for the respective fastening element 29 or fastening bolt and is used to hold the stator 2 and, in particular, to fasten it to the motor carrier 4 with screws.

[0036] The motor carrier 4 has a receiving groove 36, into which the electronic device compartment cover 6 is inserted with its surrounding cover wall 6b. The receiving groove 36 is provided with or filled with potting compound V, thereby establishing a reliable seal for the electronic device compartment 5. The area of ​​the inner plug part 21 into which the cover wall 6b is inserted with the corresponding wall section and the plug compartment 20 are also provided with or filled with sealing compound or potting compound V.

[0037] Figure 3 3 shows the stator 2 fastened to the motor carrier 4 by means of fastening elements 29 (with screws) from the perspective of the upper coil insulation 11. The connecting cable 19 connected to the outer plug part 22 can be seen.

[0038] Also observe Figure 4 The upper coil insulator 11 has a plurality of functional elements 42 at the inner radius of the receiving or installation space 32 of the stator 2. These functional elements are used to hold and / or position the contact pins 16 at or relative to the connection contacts 15 in their preset or prescribed target positions, so as to make contact with these connection contacts at the corresponding contact positions, for example by means of (laser) welded contacts. These functional elements 42 are preferably also provided and designed to hold the connection contacts 15 on the coil insulator 11 by plug-in fastening, in particular in their target positions.

[0039] Figure 4 The stator 2 of the electric motor 1 is shown in a section, with its stator base body 7 (with an annular base part 9 and stator teeth 10 formed on the outer circumference of the base part and pointing outward in the radial direction R) and the coils 13 of the stator winding 8 arranged on the stator teeth 10 with an upper coil insulation 11 as an intermediate layer. It can be seen that in the exemplary embodiment, three connecting contacts 15 and (phase) contact pins 16 contacting therewith and the stator base body 7 are formed by sheet metal sheets 37 stacked to form a sheet metal stack. The connecting contacts 15 have preferably bendable contact webs (bending webs) 38, in or on which the winding collar or winding head 14 is contacted, for example by means of laser welding and / or clamping contact.

[0040] Looking into the receiving or installation space 32, three (phase) contact pins 16 can be seen, which are in contact with the connecting contacts 15. A fastening web or radial web 35 formed by the stator base body 7 or the sheet metal sheets 37 of the sheet metal stack or the sheet metal layer is shown, which has a through opening 40 for the fastening element 29 for holding the stator 2 on the motor carrier (motor support plate) 4. Furthermore, a bolt receptacle 41 for the shaft bolt 17 in the motor carrier 4 is shown.

[0041] exist Figure 4 Also visible is a particularly fork-shaped holding or positioning element 42a, in which or by means of which the contact pin 16 is held or fixed in the desired position for contacting the respective connecting contact 15. The fork-shaped holding or positioning element 42a is formed as a functional element 42 on the inner circumferential side of the upper coil insulator 11 and projects in the radial direction R into the receiving or installation space 32.

[0042] Figure 4 Also shown are radial webs 33 arranged on the stator base body 7 or formed from its sheet metal sheets 37, projecting inwardly into the receiving or installation space 32 in the radial direction R, which have insulating projections or insulating protrusions 34 inserted into the radial webs. These are formed on radially inwardly directed (radial) webs 43 of the lower coil insulation or winding insulation 12. The radial webs 43 have through-openings for the associated contact pins 16, which are not specifically designated.

[0043] Figure 5 and Figure 6 An upper coil insulator or winding insulator 11 arranged on the stator base body 7 of the stator on the side of the stator 2 facing away from the motor carrier 4 is shown in different perspectives, in particular in a top view or a bottom view or a rear view. The upper coil insulator or winding insulator has an annular body 11a and radially (in the radial direction R, in a star shape) outwardly directed tooth caps 11b formed on the (outer) circumferential side of the annular body, which cover the stator teeth 10 on the stator side facing away from the motor carrier 4 and at least partially cover the tooth flanks or side surfaces of these stator teeth extending in the axial direction. The tooth caps 11b of the upper coil insulator or winding insulator 11 have a cap section 44 extending in the plane of the annular body 11a and side cap sections 45 formed on the cap section, which extend radially and are oriented axially or are oriented in the radial direction R and extend in the axial direction A along the side surfaces of the stator teeth 10.

[0044] according to Figure 5The annular body 11a of the upper coil insulator or winding insulator 11 has an axially raised annular wall portion 48 in the area of ​​an annular edge 47 which delimits its annular opening 46 and which is in particular formed or arranged at the inner radius of the receiving or installation space 32. In the exemplary embodiment, the annular wall portion 48 extends as a whole over approximately half of the inner periphery of the annular opening 46 of the annular body 11a. An axial plug opening 42b is provided on the opposite narrow sides or end sides of the two annular wall portions 48. The two annular wall portions 48 on the outside in the circumferential direction of the annular body 11a each have only one plug opening 42b. The plug openings 42b form in pairs functional elements 42 for holding the connecting contact portion 15 on the coil insulator 11. For this purpose, the connecting contact portion 15 has a plug pin 49 corresponding to the plug opening 42b, wherein, for reasons of overview, the plug openings 42b are shown in FIG. Figure 1 Only one of the plug pins 49 on one of the connecting contacts 15 is marked in FIG.

[0045] The functional element 42 in the form of a fork-shaped holding element or positioning element 42a, which is provided for holding and / or positioning the contact pin 16 in its provided or intended target position at the corresponding contact position relative to the connecting contact portion 15, is formed on the annular wall portion 48 in the region of the pair of plug openings 42b and projects into the installation space 32 of the stator 2 in the radial direction R. The functional element 42, 42a, which is provided for holding and / or positioning the contact pin 16, is designed as a radial supporting projection or supporting element, between which the respective contact pin 16 is arranged or accommodated, in order to position the contact pin in its target position for a secure contact connection with the associated contact pin 16, for example by welding.

[0046] In summary, the present invention relates to an electric motor 1 having a motor carrier 4 and a stator 2 fastened to the motor carrier and a rotor 3 surrounding the stator, wherein a coil insulator or winding insulator 11 is arranged at least on the side of the stator 2 facing away from the motor carrier 4, wherein contact pins 16 are arranged in a receiving or installation space 32 of the stator 2, which are in contact with the stator winding 8 of the stator via a connecting contact portion 15 and are guided into an electronics compartment 5 on the carrier side, and wherein the coil insulator or winding insulator 11 has an annular body 11a, on which functional elements 42, 42a, 42b for retaining, positioning and / or centering the contact pins 16 and / or the connecting contact portion 15 are formed.

[0047] The claimed invention is not limited to the aforementioned embodiments. On the contrary, 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, in particular, all individual features described in conjunction with different 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.

[0048] Furthermore, the described solution can be used not only for the specifically shown application but also in a similar embodiment in other motor vehicle applications, for example in door and tailgate systems, window lifters, adjustable seat systems and interior systems, and in electric drives.

[0049] Reference numerals list

[0050] 1 Electric motor

[0051] 2 Stator

[0052] 3 rotors

[0053] 4 Motor carrier / carrier plate

[0054] 5 Electronics compartment

[0055] 6 Electronics compartment cover

[0056] 6a Cover the bottom

[0057] 6b Cover wall

[0058] 7. Stator Matrix

[0059] 8 Stator winding / rotating field winding

[0060] 9 Base part

[0061] 10 stator teeth

[0062] 11 (Upper) Coil Insulator

[0063] 11a Ring

[0064] 11b tooth cap

[0065] 12 (lower) coil insulator

[0066] 13 coils

[0067] 14 Winding ring / winding end

[0068] 15Connection contact part

[0069] 16 contact pins

[0070] 17 Axis bolt

[0071] 18Motor electronics / converter electronics

[0072] 19 Connecting cable

[0073] 20 plug compartment

[0074] 21 (Inner) plug part

[0075] 22 (Outer) plug part

[0076] 23 rotor housing

[0077] 23a Shell bottom

[0078] 23b Shell wall / annular wall

[0079] 24 permanent magnets

[0080] 25 Housing section / bearing housing

[0081] 26 Rolling bearings / ball bearings

[0082] 27 bearing balls

[0083] 28 Mounting components

[0084] 29 Fastening elements

[0085] 30 Sealing element

[0086] 31Through opening

[0087] 32Accommodation space / installation space

[0088] 33 radial tabs

[0089] 34 Insulation protrusion / insulation projection

[0090] 35 radial tabs

[0091] 36 storage slots

[0092] 37 Sheet Metal

[0093] 39 Winding ring / winding end

[0094] 40 through opening

[0095] 41 bolt receiving portion

[0096] 42 functional elements

[0097] 42a Positioning element / support element

[0098] 42b plug opening

[0099] 43 radial tabs / tabs

[0100] 44 Block Section

[0101] 45 side cap section

[0102] 46 ring opening

[0103] 47 Ring Edge

[0104] 48 annular wall

[0105] 49 plug pin

[0106] A Axial direction

[0107] D Motor axis / rotation axis

[0108] R radial direction

[0109] VPotting material / sealing material

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 body part (9) and stator teeth (10) pointing radially outwards. - Among them, On a side of the stator (2) facing away from the motor carrier (4) or on a side of the stator (2) facing away from the motor carrier (4) and facing the motor carrier (4), a coil insulator or a winding insulator (11, 12) is arranged on a stator base body (7) of the stator, - wherein an annular base part (9) of the stator base body (7) forms a receiving or installation space (32), in which an axially oriented contact pin (16) is arranged, which contacts or can contact the stator winding (8) via a connecting contact (15), and which is guided into the electronics compartment (2) via a through-opening (31) of the motor carrier (4), - wherein a coil insulator or winding insulator (11) arranged on a stator base body (7) of the stator on a side of the stator (2) facing away from the motor carrier (4) comprises an annular body (11a) and tooth caps (11b) formed on the circumferential side of the annular body and pointing radially outwards, the tooth caps at least partially covering the stator teeth (10), and wherein functional elements (42, 42a, 42b) for holding, positioning and / or centering the contact pin (16) and / or the connecting contact (15) are integrally formed on the inner side of the annular body (11a).

2. The electric motor (1) according to claim 1, It is characterized in that The functional element (42) for holding and / or positioning the contact pin (16) is designed in a fork-shaped manner and has two radial support projections (42a), between which the respective contact pin (16) is arranged.

3. The electric motor (1) according to claim 1 or 2, It is characterized in that The annular body (11a) has an axially raised annular wall (48) with a plug opening (42b) as a functional element (42, 42b) for a connecting contact (15) provided for contacting a winding ring or a winding head (14) of the stator winding (8), in particular a coil (13) of the stator winding.

4. The electric motor (1) according to claim 3, It is characterized in that Functional elements (42, 42a) for holding and / or positioning the contact pin (16) are integrally formed onto the annular wall (48).

5. The electric motor (1) according to any one of claims 1 to 4, It is characterized in that The contact pin (16) is guided into the electronics compartment (2) via a sealing element (30) in a through-opening (31) of the motor carrier (4).

6. The electric motor (1) according to any one of claims 1 to 5, It is characterized in that The tooth cap (11b) of a coil insulator or winding insulator (11) arranged on a stator base body (7) of the stator on a side of the stator (2) facing away from the motor carrier (4) has a cap section (44) extending in the plane of the annular body (11a) and a side cap section (45) formed on the cap section, in particular extending radially and oriented axially.

7. The electric motor (1) according to any one of claims 1 to 6, It is characterized in that The stator base body (7) is formed as a sheet metal stack from a plurality of stacked sheet metal laminae (40).

8. The electric motor (1) according to any one of claims 1 to 7, It is characterized in that The stator base body (7) has radial webs (33) which are aligned with the through-openings (31) of the motor carrier (4) and through which associated contact pins (16) pass.

9. The electric motor (1) according to any one of claims 1 to 8, It is characterized in that A coil insulator or winding insulator (12) arranged on a stator base body (7) of the stator on the side of the stator (2) facing the motor carrier (4) has a number of axially raised insulating projections (34) corresponding to the number of contact pins (16), which extend into a receiving or installation space (32) of the stator base body (7) and are penetrated by the respective contact pins (16).

10. The electric motor (1) according to any one of claims 1 to 9, It is characterized in that The stator base body (7) has radial webs or fastening webs (35) projecting into the receiving or mounting space (32) and having through-openings (40) for fastening elements (29) for fastening the stator (2) to the mounting carrier (4).

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