Connecting devices and electric motors, especially radiator fan motors

Abstract

The present invention relates to a connection device (9) for connecting a wiring harness having a certain number of lines (10, 11) to a motor electronic device (5) of an electric motor, the connection device having a connection interface, the connection interface having a contact element arranged in a contact housing, the contact element having a connection contact portion (19a, 19b) assigned to the motor electronic device (5) and led out of the contact housing, and a connection contact portion (19a, 19b) assigned to the wiring harness and led out of the contact housing, wherein the contact housing has a splicing contour in the area of ​​the connection contact portion (19a, 19b) on the conductor side, and the connection device has an adapter plug (17), the adapter plug has an adapter housing, the line contact portion is led out of the adapter housing, wherein the adapter housing has a splicing element corresponding to the splicing contour of the contact housing, for establishing a splicing connection between the adapter housing and the contact housing while making the line contact portion contact with a second connection contact portion (19a, 19b) of the connection interface.

Description

Technical Field

[0001] The invention relates to a coupling device for coupling a wiring harness having a plurality of lines to the motor electronics of an electric motor. The invention also relates to an electric motor having such a coupling device. Background Art

[0002] Such electric motors usually include a rotor or mover which is rotatably mounted relative to a stationary stator or column. In brushless electric motors, the stator is usually equipped with a rotating field winding, by which a rotating magnetic field is generated by applying an alternating current to it. The rotor, which is arranged inside the essentially hollow cylindrical stator in the so-called inner mover (motor) and surrounds the stator in the so-called outer mover (motor), is usually equipped with permanent magnets, which generate a rotor magnetic field that interacts with the rotating magnetic field of the stator.

[0003] In brushless electric motors, the alternating current provided for feeding the stator winding is usually generated by a converter (inverter). The converter can be accommodated together with the associated control electronics (motor electronics) in an electronics box that is integrated into the motor housing. The control electronics must be protected against moisture, so that in such electric motors, which are used, for example, as radiator fan motors in motor vehicles, high requirements are placed on the tightness of the electronics box.

[0004] Motor electronics electrically connected to the onboard power supply of a motor vehicle usually have a connection terminal (connection interface or motor interface) led out of its (electronics) housing as a connection device, whose connection contacts (connection points) are electrically insulated from each other and from the surrounding environment. The electrical connection of the motor electronics to the onboard power supply is generally carried out by a certain number of lines of a wiring harness guided in the onboard power supply cable, one cable end or wiring harness end of the wiring harness having a plug connection, while the other cable end or wiring harness end thereof is connected to the motor electronics to be powered via an electrically conductive connection. Such an electrical connection of the individual conductor ends of the lines of the wiring harness to the connection terminal can be established by welding, soldering, clamping or crimping.

[0005] Such a connection device is also provided in particular for use in electric motors which already have connection lines and which are used, for example, as a drive for a radiator fan (radiator fan motor) of a motor vehicle. The radiator fan motor is operated by means of an electrical or electronic control circuit of the motor electronics in order to adjust the required cooling power. The radiator fan motor is supplied with power via an onboard power supply cable which is connected to an energy storage device (vehicle battery) of the motor vehicle. In this case, the wiring harness generally includes control and / or signal lines from sensors or a higher-level control device in addition to supply lines, i.e. the positive and negative poles of the supply voltage of the energy storage device or the onboard power supply.

[0006] WO 2011 / 137949 A1 and WO 2011 / 137950 A1 disclose an electrical motor connection, in particular of an electric radiator fan motor of a motor vehicle, with a connected wiring harness, the line ends of which are connected to motor-side connection terminals. The connection housing has two housing parts, which accommodate the connection-side line ends of the wiring harness and form a cavity between the housing parts that can be filled with a curable potting compound in order to protect the connection terminals of the wiring harness or the connection-side line ends from undesirable consequences due to temperature fluctuations and moisture.

[0007] DE 102017214774 A1 discloses a connection device which is used as an electrical motor connection (motor interface) to connect a wiring harness to a printed circuit board of a motor electronics device arranged in a motor bracket of an electric motor, wherein the wiring harness has a certain number of lines which are guided in the onboard power supply cable to the connection device. The motor bracket is a housing part which is fastened to the motor housing of the electric motor and which is covered by a cover relative to a closed electronics housing for the motor electronics. The motor bracket, which is made of aluminum, for example, has a motor bracket bottom which is coupled to the motor housing and which is surrounded on the circumference by an axially upright housing wall. The motor electronics are accommodated in a housing interior space or an electronics box surrounded by the motor bracket and the cover.

[0008] In particular in the case of radiator fan motors (drives), the connection devices are designed and set up for the respective power type and / or the line cross-section of the wiring harness provided for this purpose, which is correspondingly complex in terms of providing different components of the respective connection devices, the tools required for this purpose, and testing. Summary of the invention

[0009] The object of the present invention is to provide a connection device suitable for different line cross sections of a wiring harness of an onboard power supply cable of a motor vehicle, which in particular has as many common parts as possible. In addition, a suitable electric motor with such a connection device should be provided.

[0010] According to the invention, this object is achieved with respect to the coupling device by means of the features of claim 1 and with respect to the electric motor by means of the features of claim 10. Advantageous embodiments and developments are the subject matter of the respective dependent claims.

[0011] The connection device according to the invention is suitable and designed as a motor connection, preferably as an electrical and mechanical motor interface, for connecting a wiring harness to a motor electronics system. The motor electronics system can have a printed circuit board equipped with electronic components and an EMC filter (Electromagnetische Electromagnetic compatibility) is an interference-proof element for EMC protection. The motor electronics are arranged in or on the motor support of the electric motor. The wiring harness has a certain number or multiple lines, which are led to the connection device, for example in the vehicle power supply cable.

[0012] The connection device has a connection interface and an adapter plug. The connection interface has a contact housing, in which a contact element having a first and a second connection contact is arranged. The first connection contact is assigned to the motor electronics and is led out of the contact housing on the first housing side. The second connection contact is assigned to the wiring harness and is led out of the contact housing on the second housing side. In the region of the second connection contact, the contact housing has a mechanical interface with a splicing contour.

[0013] The adapter plug has an adapter housing, and the line contact part is led out of the adapter housing. The line contact part can be arranged on the end side of the line of the wiring harness, or can be transformed into a mating contact part inside the adapter housing for plug or joint connection. The adapter housing has a splicing element corresponding to the splicing contour of the contact part housing at the mechanical interface, which is used to establish a (mechanical) splicing connection between the adapter housing and the contact part housing, and to establish an (electrical) contact between the line contact part and the second connection contact part of the connection interface. Suitably, the contact part housing has housing pillars spaced apart from each other in the area of ​​the second housing side, and contour elements of the splicing contour are respectively arranged on the housing pillars.

[0014] In an advantageous embodiment, the connection interface is implemented in a flat structure. The first and second housing sides of the contact housing are preferably located in housing planes that are perpendicular to each other. In this case, the first housing side is the flat side of the housing, which faces the motor electronics. The connection contact leading from the first housing side of the contact housing establishes an electrical connection with the corresponding contact of the motor electronics, which is especially realized as a plug connection, preferably as a clamping connection or an insulation piercing connection. In order to establish the desired tightness, a seal, especially a sealing ring, is provided on the first housing side of the contact housing, which seal or sealing ring surrounds the first connection contact of the connection interface assigned to the motor electronics.

[0015] Another advantageous embodiment provides that the adapter plug is designed as a flat plug. In this variant, the line contact is transformed into a mating contact inside the adapter housing for a plug or joint connection with a corresponding connection plug. In a suitable manner, the second connection contact and / or the line contact of the line of the wiring harness is designed as a contact or flat contact.

[0016] The splice connection between the connection interface and the adapter plug is expediently a form-fitting connection, expediently a splice connection with a suitable splice contour of the contact housing, in particular at its housing struts and corresponding splice elements of the adapter plug. Preferably, a dovetail splice connection is provided, which has a dovetail splice element on the contact housing and a matching splice element on the adapter housing. Particularly advantageously, the splice direction for producing the splice connection is transverse to the line longitudinal direction of the wiring harness or perpendicular (orthogonal) to the connection interface, i.e. perpendicular to the housing plane of the first housing side of the contact housing.

[0017] A first variant of the adapter housing provides a one-piece housing block having a through-opening for the line contact of the line of the wiring harness. Alternatively, the adapter housing is designed as a double-hood type, wherein the housing covers that are spliced ​​or can be spliced ​​to each other are connected separately or in an articulated manner, in particular by means of a film hinge. The spliced ​​connection can be designed as a snap connection, which has a snap opening on one of the housing covers and a corresponding snap hook on the other housing cover. Alternatively, the connection of the housing covers can be achieved by heat compression.

[0018] In order to securely hold the wiring harness, i.e. the line, in the adapter housing, in particular when it is designed as a one-piece or two-piece housing block, the line is held in the adapter housing in a form-fitting or force-fitting manner. It is particularly advantageous if the line or its conductor insulation is held in the adapter housing in a material-locking manner by heat-compression bonding. For this purpose, the adapter housing has a prepared compression profile.

[0019] The electric motor according to the invention is embodied in particular as an electric (electric motor-like) radiator fan motor for a motor vehicle. The electric motor is preferably an inner rotor and is fastened at the desired installation location by means of a motor bracket. The motor bracket accommodates motor electronics, which are connected or can be connected to the motor vehicle onboard power supply by means of the above-mentioned connection device. This makes it possible to achieve a particularly suitable electric motor. In particular, the connection device allows particularly reliable and operationally safe motor operation and a connection technology with a small number of universal parts for different applications, in particular with regard to different conductor cross sections of the lines of the wiring harness to be connected.

[0020] In the case of a connection device with an adapter plug implemented in the manner of a so-called Y adapter (Y plug), the adapter plug or its adapter housing, in particular in the manner of a one-piece or two-piece housing block with a through-opening for a line contact for a line, has a first plug part and a second plug part, preferably implemented in a flat structure. This variant is particularly suitable for connecting two electric motors, wherein the connection interface is guided to one of the two electric motors with one of the two plug parts. Another plug part, preferably implemented in a flat structure, with a mating contact inside the housing is suitable for and is provided for accommodating a connection plug for the other of the two electric motors. The plug or plug appearance of the second plug part of the adapter plug, preferably implemented in a flat structure, which is preferably implemented with a male contact, is advantageously adapted to a customer-specific plug appearance preferably with a female contact for direct plugging with the other of the two electric motors.

[0021] The advantages achieved with the invention are in particular that only a small number of connection components have to be provided for different motor powers of electric motors, for different line cross sections of the lines of the wiring harness (cable), and / or for different connection diagrams (connection geometries or connection layouts) of the connection contacts assigned to the motor electronics. Thus, for example, similar adapter plugs that differ in the cable cross section of the wiring harness to be used can be mechanically and electrically connected to the same connection interface. Likewise, the same adapter plug can be connected to connection interfaces to the motor electronics that have different connection appearances. In this way, with a small number of common parts, a variety of connection variants can be realized, which, for example, have lines with different cross sections, connection interfaces with different connection appearances at the electronics and adapter interface, or different housing embodiments of the adapter housing (one-piece or multi-piece or in a flat design) at the adapter plug interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Embodiments of the present invention are described in more detail below with reference to the accompanying drawings. In which:

[0023] Figure 1 A radiator fan motor for a motor vehicle with integrated motor electronics is shown in a perspective view and from the perspective of a coupling device;

[0024] Figure 2 The motor electronics in the region of the coupling device are shown in a perspective fragmentary representation;

[0025] Figure 3a and 3b The coupling interface of the coupling device is shown in a perspective view and viewed from the coupling side of the contact housing or from its housing rear side;

[0026] Figure 4 A perspective view shows an adapter plug having a first variant of an adapter housing with a line contact leading to a line of a wiring harness;

[0027] Figure 5 A perspective diagram showing Figure 4 An adapter plug spliced ​​with a connection interface;

[0028] Figure 6 Based on Figure 4 The illustration shows a second variant of the adapter housing of the adapter plug;

[0029] Figure 7 Based on Figure 5 The diagram shows that according to Figure 6 An adapter plug spliced ​​with a connection interface;

[0030] Figure 8 A one-piece variant of an adapter housing of an adapter plug is shown in a perspective view;

[0031] Figure 9a and 9b A perspective view shows a two-part variant of an adapter housing of an adapter plug without or with an articulated connection; and

[0032] Fig.10a and 10b A further variant of an adapter plug (Y-adapter) is shown in a perspective view or in a partial sectional view, with a first plug part and a second plug part arranged transversely thereto.

[0033] In all figures, parts and dimensions that correspond to one another are provided with the same reference symbols. DETAILED DESCRIPTION

[0034] Figure 1 1 shows an electric motor 1 for a fan of a radiator of a motor vehicle. The electric motor 1 has a stator 2, which is wound with a three-phase rotating field winding in the form of coils, for example. The electric motor 1 also has a permanently excited rotor (not shown in detail) which is supported in the stator 2 in a manner that allows it to rotate about the axis of the electric motor. An approximately disk-shaped motor support 3 is arranged on the end side of the stator 2, in which an electronic device box 4 ( Figure 2 ), into which the motor electronics 5 are placed. In order to protect against external influences, the electronics box 4 is sealed in the assembled state by a (housing box) cover (electronics box cover) 6.

[0035] The stator 2 is formed by a laminated core which is injection-molded with a plastic sheath 7. The motor mount 3 is made of an aluminum material, in particular as a one-piece injection-molded part. In this embodiment, the cover 6 is designed as an injection-molded part made of plastic. The electric motor 1 and thus the entire fan are fastened to the motor vehicle via the motor mount 3, which for this purpose has three threaded tongues 8 which are arranged distributed on the circumference and project from the outer circumference.

[0036] The electric motor 1 has a connection device 9, by means of which the motor electronics 5 accommodated in the electronics box 4 are connected to the lines 10, 11 of the wiring harness 12 of the onboard power supply cable 13. In the exemplary embodiment, the wiring harness 12 includes two power supply lines 10 and two signal or control lines 11. Due to the necessary current carrying capacity, the power supply lines 10 have a relatively large line diameter or line cross section compared to the signal or control lines 11. The onboard power supply cable 13 is equipped with a plug connector 14 on the cable end facing away from the electric motor 1, which is used to connect to the onboard power supply of the motor vehicle. The onboard power supply of the motor vehicle is implemented here, for example, as a 12V, 24V or higher (direct current voltage or DC) onboard power supply.

[0037] Figure 2 , the connection device 9 arranged between the stator 2 and the motor support 3 is shown with the cover 6 removed. In the exemplary embodiment, the wiring harness 12 has two power supply lines 10 and control or signal lines 11 respectively. The motor electronics 5 has a printed circuit board 15 (which is equipped with electronic components not shown in detail, such as inverter circuits) and interference suppression elements as EMC protection or EMC filters, which in the exemplary embodiment have capacitors 15a and chokes (coils) 15b. The connection device 9 essentially forms a motor interface (motor connection) between the motor electronics 5 and the onboard power supply cable 13 or its wiring harness 12.

[0038] In radiator fan operation, the electric motor 1 is fed with direct current via a supply line 10 which is connected to the vehicle energy storage device (vehicle battery) in a manner not shown in detail. The control or signal line 11 is used to control the electric motor 1 or the data exchange between the motor electronics 5 and the vehicle electronics. For example, control commands in radiator fan operation are transmitted from the vehicle electronics to the electric motor 1 via the control or signal line 11, or operating information of the electric motor 1, such as the (motor) speed, is transmitted to the vehicle electronics.

[0039] The connection device 9 has Figure 2 The connection interface 16 and the adapter plug 17 are visible in FIG. An advantageous embodiment of the connection interface 16 is Figure 3a and Figure 3b Shown in top view or rear side view.

[0040] according to Figure 3a and Figure 3b The connection interface 16 has an interface housing 18, which is subsequently referred to as a contact housing, in which a contact element 19 having a first and a second connection contact 19a or 19b is arranged. Preferably, the contact element 19 is provided with a plastic injection-molded encapsulation, i.e., is injection-molded while forming the contact housing 18. A first connection contact 19a assigned to the motor electronics 5 is led out of the contact housing 18 on a first housing side 18a. A second connection contact 19b assigned to the wiring harness 12 is led out of the contact housing 18 on a second housing side 18b. The contact housing 18 has a mechanical interface 20 with a splicing contour 21 in the region of the second connection contact 19b.

[0041] In particular, two outwardly placed power supply contacts and two signal or control contacts arranged between the power supply contacts are provided as contact elements 19. The first connection contact 19a is implemented as a rectangular flat contact, while the second connection contact 19b is implemented as a square flat contact. The connection interface can differ from the connection interface 16 shown in terms of its size. In particular, each of the four contact elements 19 shown can be assigned only a first connection contact 19a on the electronic component side. This is suitable, for example, for a power supply line 10 having a width of 4 mm. 2 Up to 6mm 2 The line cross section of the wiring harness is 12, while Figure 3a The arrangement shown is particularly suitable for 6mm 2 Up to 10mm 2 The connecting contact 19a on the electronics side is suitably designed as a clamping contact or an insulation piercing contact.

[0042] The connection interface 16 is designed in a flat structure. The first and second housing sides 18a and 18b of the contact housing 18 are located in housing planes that are perpendicular to each other. Figure 3a In the coordinate system shown, the first housing side 18a is located in the xy plane or parallel thereto, while the second housing side 18b is located in the xz plane of the coordinate system shown or parallel thereto. In this case, the first housing side 18a faces the motor electronics 5. The first connecting contacts 19a led out of the contact housing 18 on the first housing side 18a establish an electrical connection realized as a plug connection with corresponding contacts of the motor electronics 5 or the interference suppression elements 15a, 15b.

[0043] A seal 22 is provided on the first housing side 18a of the contact housing 18, which is preferably produced by the 2-K method (two-component method) with the encapsulation of the contact element 19, i.e., by injection molding together with the contact housing 18. The annular seal (sealing ring) 22 completely surrounds the first connecting contact 19a.

[0044] according to Figure 3b The splicing contour 21 is a dovetail-like interface-side splicing element (contour element) 21a on the respective housing struts 23 of the connecting interface 16, which extend along the y-direction shown on the second housing side 18b of the contact housing 18 and accommodate the second connecting contact 19b therebetween.

[0045] exist Figure 4 The adapter plug 17 shown in perspective in the figure has an adapter housing 24, from which the line contacts 25 on the supply side of the power supply line 10 and the line contacts 26 on the plug side of the signal or control line 11 of the wiring harness 12 are led. The adapter plug 17 is implemented as a flat plug. In this variant, the block-shaped adapter housing (housing block) 24 is implemented as an injection-molded encapsulation of the conductor ends of the lines 10, 11 of the wiring harness 12, especially made of plastic. Here, the line contacts 25, 26 are led out of the housing block 24. In addition, the adapter housing 24 has a pressing contour 21c for hot pressing the lines 10, 11 (or their conductor insulation). As a result, the lines 10, 11 are additionally fixed in the adapter housing (housing block) 24 in a stress-relieving manner.

[0046] The adapter housing 24 has an adapter-side splicing element 21 b corresponding to the interface-side splicing element 21 a at the mechanical interface 20 for producing a spliced ​​connection between the adapter housing 24 and the contact housing 18. The line contacts 25, 26 assigned to the lines 10, 11 of the wiring harness 12 are designed as contact contacts or also as flat contacts.

[0047] The connection interface 16 and the adapter plug 17 are Figure 5 The splice connection shown in FIG. 1 is a form-locking connection, wherein the plugging or splicing direction is in the z direction shown, i.e. transversely to the line longitudinal direction L of the wiring harness 12 and perpendicular (orthogonal) to the xy housing plane (interface plane) of the first housing side 18a of the contact housing 18. The splice connection also establishes an electrical contact between the line contacts 25, 26 and the second connection contacts 9b. In addition, these connection contacts 25, 26 and 19b can also be welded, in particular by resistance welding. In this way, a reliable strain relief of the adapter plug 17 is additionally achieved.

[0048] Figure 6 An alternative adapter housing of the adapter plug 17 is shown in the form of a flat plug housing 24 ′. This variant is particularly suitable for connecting coupling plugs which, for example, have an application- or customer-specific plug appearance and preferably have male contacts on the adapter plug 17 for a direct plug connection.

[0049] Figure 7The splice connection 27 between the connection interface 16 and the adapter plug 17 is shown, which has a flat plug housing 24' on the mechanical interface 20. The plugging or splicing direction is again transverse to the line longitudinal direction L of the wiring harness 12, or perpendicular (orthogonal) to the xy housing plane of the first housing side 18a of the contact housing 18. In addition, the electrical contact of the line contacts 25, 26 with the second connection contacts 19b is also established here simultaneously by means of the mechanical splice connection, wherein in this embodiment, the contact contacts 25, 26 and 19b can also be additionally welded.

[0050] Figure 8 A variant of a block-shaped adapter housing 24 is shown, which here again is designed as a housing block, preferably made of plastic, but has a housing lead-through 28. The conductor ends of the lines 10, 11 are guided through the housing lead-through and the conductor insulation of the lines is again shrunk in the adapter housing 24. The line contacts 25, 26 are again led out of the block-shaped adapter housing 24.

[0051] Figure 9a and Figure 9b A double-shell variant of an adapter housing 24, which is again designed as a housing block, preferably made of plastic, is shown. Two housing shells 24a, 24b are joined together, wherein these housing shells are connected in an articulated manner using a film hinge 29 in the exemplary embodiment. The spliced ​​connection 30 between the housing shells 24a, 24b is formed as a snap connection by means of a snap-on opening 30a on one of the housing shells 24a, 24 and a snap-on hook 30b on the other housing shell 24a, 24. In this two-piece housing block embodiment, the conductor insulation of the lines 10, 11 in the adapter housing 24 is also heat-sealed.

[0052] Fig.10a and Fig.10b A variant of the coupling device 9 is shown, which has a Y adapter (Y plug) as an adapter plug 17, which is spliced ​​with the coupling interface 16 at the mechanical interface 20. The adapter plug 17 or its adapter housing 24, 24' has a first plug part 17a (according to Figure 4 , Figure 8 9, with a through opening 28 for the line contacts 25, 26 of the lines 10, 11, a one-piece or two-piece housing block of the type) and in a flat structure according to Figure 6 In the embodiment, the two plug parts 17a and 17b are arranged transversely to each other. However, the arrangement may be different and may be implemented, for example, with the two plug parts 17a and 17b being arranged at an acute angle (Y-shaped) to each other.

[0053] In the second plug part 17b, a contact element or contact rail 31 is arranged, which has a connecting piece 31a leading out of the first plug part 17a and a mating contact 31a for a not shown connecting plug arranged inside the adapter housing 24' of the second plug part 17b. The contact of the contact element or contact rail 31 on the interface side is carried out via the connecting piece 31a arranged between the second connecting contact 19b of the connecting interface 16 and the line contacts 25, 26, as shown in FIG. Fig.10b As seen in.

[0054] This variant with a Y adapter plug is preferably provided for connecting two electric motors, wherein the first plug part 17a of the adapter plug 17 is led to the connection interface 16 on the electric motor side. The second plug part 17b of the adapter plug 17 with the mating contact 31a inside the housing accommodates a connection plug for a further electric motor. The plug appearance of the second plug part 17b, which is preferably embodied with male contacts, is adapted, for example, to a connection plug with a customer-specific plug appearance with female contacts for direct plug connection.

[0055] In summary, the connection device 9 has a connection interface 16 with a contact element 19 arranged in a contact housing 18, the contact element having a connection contact 19a assigned to the motor electronics 5 and extending from the contact housing 18, and a connection contact 19b assigned to the wiring harness 12 and extending from the contact housing 18. The connection device 9 also has an adapter plug 17 with an adapter housing 24, 24', from which line contacts 25, 26 of the lines 10, 11 extend, wherein the adapter housing 24, 24' has a splicing element 21b corresponding to the splicing contour 21 of the adapter housing 18, in order to produce a splicing connection 27 between the adapter housing 24, 24' of the adapter plug 17 and the contact housing 18 of the connection interface 16, while making contact with the line contacts 25, 26 with the second connection contacts 19b of the connection interface 16.

[0056] The claimed invention is not limited to the above-described 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 single features described in combination with different embodiments within the scope of the disclosed claims can also be combined in other ways without departing from the subject matter of the claimed invention.

[0057] 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 for door and tailgate systems, for window lifters, for vehicle locks, for adjustable seats and interior systems and other electric drives and their arrangement in the vehicle.

[0058] Reference numerals list

[0059] 1 Electric motor

[0060] 2 Stator

[0061] 3 Motor bracket

[0062] 4 Electronics Box

[0063] 5 Motor electronics

[0064] 6 Cover

[0065] 7 Plastic sheath

[0066] 8 Threaded tongue

[0067] 9 Connecting equipment

[0068] 10 Lines / power supply lines

[0069] 11 Line / Signal or control line

[0070] 12 Wire Harness

[0071] 13 On-board power grid cable

[0072] 14 Plug connector

[0073] 15. Printed Circuit Board

[0074] 15a Anti-interference components / capacitors

[0075] 15b Anti-interference element / choke

[0076] 16 Connection interface

[0077] 17 Adapter plug

[0078] 17a First plug member

[0079] 17b Second plug member

[0080] 18 Interface contact housing

[0081] 18a First housing side

[0082] 18b Second housing side

[0083] 19 Contact element

[0084] 19a First connecting contact portion

[0085] 19b Second connection contact portion

[0086] 20 (Mechanical) interface

[0087] 21 Stitching outline

[0088] 21a Splicing components on the interface side

[0089] 21b Splicing element on the adapter side

[0090] 21c Press fit profile

[0091] 22 Seals / Sealing Rings

[0092] 23 Shell support

[0093] 24 Adapter housing / housing block

[0094] 24a, b Housing cover

[0095] 24' Flat Plug Housing

[0096] 25 Line contact on the supply side

[0097] 26 Line contact on the plug side

[0098] 27 Splicing Connection

[0099] 28 Shell penetration

[0100] 29 Film hinge

[0101] 30 Splicing Connection

[0102] 30a snap hook

[0103] 30b Buckle opening

[0104] L Line longitudinal direction

Claims

1. A connection device (9) for connecting a wiring harness (12) having a certain number of lines (10, 11) to a motor electronics (5) of an electric motor, the connection device comprising: - a connection interface (16), the connection interface having a contact element (19) arranged in a contact housing (18), the contact element having a first connection contact (19a) assigned to the motor electronics (5) and led out of the contact housing (18) on a first housing side (18a) and a second connection contact (19b) assigned to the wiring harness (12) and led out of the contact housing (18) on a second housing side (18b), wherein: The contact housing (18) has a joining contour (21) in the region of the second connecting contact (19b), - an adapter plug (17) having an adapter housing (24, 24') from which line contacts (25, 26) are led, wherein the adapter housing (24, 24') has a splicing element (21b) corresponding to the splicing contour (21) of the contact housing (18) for producing a splicing connection (27) between the adapter housing (24, 24') and the contact housing (18) and simultaneously bringing the line contacts (25, 26) into contact with a second connection contact (19b) of the connection interface (16), The contact housing (18) has housing struts (23) spaced apart from one another in the region of the second housing side (18b), on which contour elements (21a) of the splicing contour (21) are respectively arranged, The connecting device (9) has a dovetail-like splicing profile (21) of the contact housing (18) and a corresponding dovetail-like splicing element (21b) of the adapter plug (17), wherein a splicing direction (z) for establishing the spliced ​​connection (27) is transverse to the longitudinal direction (L) of the line of the wiring harness (12) and / or perpendicular to a housing plane (xy) of a first housing side (18a) of the contact housing (18).

2. The coupling device (9) according to claim 1, It is characterized in that The first housing side (18a) and the second housing side (18b) are located in housing planes (xy, xz) of the contact housing (18) that are perpendicular to one another.

3. A coupling device (9) according to claim 1 or 2, It is characterized in that A seal (22) is arranged on a first housing side (18a) of the contact housing (18) and surrounds a first connecting contact (19a) associated with the motor electronics (5).

4. A coupling device (9) according to any one of claims 1 to 2, It is characterized in that A first connection contact (19a) of the connection interface (16) which is assigned to the motor electronics (5) is designed as a plug contact.

5. A coupling device (9) according to any one of claims 1 to 2, It is characterized in that A second connecting contact (19b) assigned to the wiring harness (12) and / or a line contact (25, 26) of the lines (10, 11) of the wiring harness (12) are implemented as contact or flat contacts.

6. A coupling device (9) according to any one of claims 1 to 2, It is characterized in that The connection interface (16) is designed in a flat construction and / or the adapter plug (17) is designed as a flat plug.

7. A coupling device (9) according to any one of claims 1 to 2, It is characterized in that The adapter housing (24, 24') is designed as a one-piece housing block, which has a through-opening (28) for the line contact parts (25, 26) of the lines (10, 11) of the wiring harness (12), or The adapter housing (24, 24') is designed as a double-shell housing, whose housing shells (24a, 24b) which are joined or can be joined to one another are connected separately or in an articulated manner.

8. A coupling device (9) according to any one of claims 1 to 2, It is characterized in that The adapter plug (17) is designed with a first plug part (17a) and a second plug part (17b) of flat design, the first plug part having a through-opening (28) for line contacts (25, 26) of the lines (10, 11).

9. A coupling device (9) according to any one of claims 1 to 2, It is characterized in that The lines (10, 11) are held in an adapter housing (24, 24') in a form-fitting, force-fitting and / or materially bonding manner.

10. An electric motor (1) comprising: a motor mount (3) with motor electronics (5) arranged therein; and a coupling device (9) according to any one of claims 1 to 9.

11. The electric motor (1) according to claim 10, It is characterized in that The electric motor is an electric radiator fan motor of a motor vehicle.

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