DE102023211128A1 - Wheel motor with integrated wheel brake and wheel-integrated control - Google Patents

Abstract

The present invention generally relates to a wheel motor with an integrated wheel brake, in particular for a motor vehicle.
For this purpose, an electric motor drive unit is proposed, comprising a drive motor with a stator and a rotor, wherein the stator is connected in a rotationally fixed manner to a receptacle, wherein the receptacle can be firmly connected to a vehicle frame, the receptacle comprises a holding plate which is circular in shape and oriented in the radial direction, wherein at least one printed circuit board is arranged adjacent to the holding plate on the side of the holding plate facing away from the vehicle frame, and wherein the electric motor drive unit further comprises a wheel brake.

Description

The present invention generally relates to a wheel motor with a wheel-integrated control and an integrated wheel brake, in particular for a motor vehicle.

Wheel-mounted drive systems for motor vehicle wheels, also known as wheel motors or wheel hub motors, represent a current drive concept for electrically powered vehicles. The drive motor is designed for each individual wheel and located in the vicinity of the driven wheel, for example, near the wheel hub. The torque is transmitted to the wheel via a very short drive shaft or directly.

Wheel motors enable high efficiency thanks to a short chain of effects. They are easily configurable for two-wheel drive or four-wheel drive. They are also capable of supporting regenerative braking.

The electrical power supply for operating the wheel motors, i.e., applying the desired torque to the wheel, is typically provided by the vehicle's storage units or batteries. This results in another advantage of such drive motors, which can be seen in the independent torque control. Recent developments aim to combine wheel brakes with such wheel motors.

On the other hand, alongside the advantages, there are also various challenges. For example, there may be a delay in the signal transmission between an in-vehicle or central control unit and the respective wheel-mounted drive or wheel brake.

To transmit the control signals between the central control unit and the wheel-mounted drive or wheel brake, appropriate cabling is required, which can be complex. Furthermore, a reliable power supply must be ensured. The electrical cables required for this may sometimes be exposed, for example, between the wheel and the vehicle frame, which can lead to problems, as harsh environmental conditions can prevail in such exposed locations.

If a central control unit is used for all wheel motors and wheel brakes, as may be necessary for cost-effective reasons, a delayed response may also occur. This can lead to undesirable driving characteristics, especially since an axle differential may no longer be available.

However, arranging control units directly on or in the wheel can lead to temperature problems, as heat, such as that generated during braking or by the components of the control units themselves, cannot be dissipated easily.

Therefore, configurations of wheel motors and/or wheel brakes that do not have the above-mentioned disadvantages or at least mitigate them are desirable.

The inventors have taken on this task.

This object is achieved surprisingly simply by an electric motor drive unit, in particular for a wheel or wheel hub motor of a motor vehicle and a motor vehicle comprising such an electric motor drive unit, according to one of the independent claims.

Preferred embodiments and further developments of the invention can be found in the respective subclaims.

• eine Radbremse, wobei die Radbremse zumindest einen rotierenden Anteil umfasst.
• einen Antriebsmotor mit einem Stator und einem Rotor, wobei der Stator innerhalb des Rotors angeordnet und mit einer Radnabe drehfest verbindbar oder verbunden ist,
• und wobei der Rotor zumindest einen Permanentmagneten umfasst, welcher zwischen dem Stator und dem Rotor angeordnet ist,
• und eine vorzugsweise scheibenförmige Transferplatte, welche angrenzend an den Rotor angeordnet und mit dem Rotor drehfest verbunden ist,
• wobei die Transferplatte eine zentrische Durchführung zur Durchführung eines Abschnittes der Radnabe umfasst,
• und wobei die Transferplatte mit dem rotierenden Anteil der Radbremse drehfest verbunden ist.

In a first aspect, the invention thus comprises an electric motor drive unit, in particular a wheel or wheel hub motor of a motor vehicle, comprising

• a wheel brake, wherein the wheel brake comprises at least a rotating portion.
• a drive motor with a stator and a rotor, wherein the stator is arranged within the rotor and can be connected or is connected to a wheel hub in a rotationally fixed manner,
• and wherein the rotor comprises at least one permanent magnet arranged between the stator and the rotor,
• and a preferably disc-shaped transfer plate, which is arranged adjacent to the rotor and is connected to the rotor in a rotationally fixed manner,
• wherein the transfer plate comprises a centric passage for passing through a portion of the wheel hub,
• and wherein the transfer plate is non-rotatably connected to the rotating portion of the wheel brake.

The electric motor drive unit can therefore comprise a wheel or wheel hub motor and a wheel brake for a motor vehicle. A motor vehicle can comprise at least one, preferably several axles, wherein at least one of these axles comprises steerable wheels and, in addition, the drive of the wheels of at least one axle can be adjusted electromechanically to suit the specific wheel.

Since a wheel or wheel hub motor is a known technology, a detailed description of its operation will be omitted here and only the elements essential to the invention will be discussed.

The drive motor can comprise a stator and a rotor. The stator can be designed in a known manner with corresponding electrical coil windings. The rotor can comprise at least one, preferably a plurality of permanent magnets, which can be firmly connected to the rotor. The rotor can be designed as a drum or drum-like, wherein the permanent magnets can be arranged on the inside, preferably facing the stator. The permanent magnet and stator can be arranged relative to one another in such a way that, during operation, a corresponding drive torque can be transferred from the stator to the rotor by applying an electric field.

The drive motor can be controlled by an electronic control unit according to the amount of lowering of an accelerator pedal by a driver, or also by a higher-level control unit, for example in the context of driverless driving.

The stator can be arranged radially within the rotor, in particular within the permanent magnets. The stator can be connected in a rotationally fixed manner to a wheel hub, which in turn can be firmly connected to a vehicle. The rotor can be connected in a known manner to a rim, which can support the wheel.

The wheel hub can comprise a disc-shaped or, in particular, annular retaining plate, which can have a substantially radial orientation. A disc-shaped or annular design is not mandatory, but is considered expedient in order to transmit higher torque as effectively as possible in confined spaces. According to a preferred embodiment of the invention, the retaining plate can virtually or largely close off the rotor from the vehicle frame, which can be advantageous for preventing dirt or similar substances from penetrating the rotor.

According to a particularly preferred embodiment of the invention, the retaining plate can be designed to support the stator. For this purpose, the retaining plate can be provided with appropriate means and/or receptacles for fixed connection to the stator.

The inventors have discovered that the potential cooling problems of the drive motor and/or power electronics, such as those associated with an electronic control unit for controlling the drive motor and/or the wheel brake, can be significantly reduced if the retaining plate is configured with at least one cooling channel. During operation, a cooling medium can be passed through the at least one cooling channel, allowing heat to be dissipated. The cooling medium can comprise a fluid, such as water or oil.

This makes it possible to arrange the electronic components belonging to the electronic control unit, for example, a circuit board, inside the stator. According to the invention, an electronic control unit for controlling the drive motor and/or the wheel brake can thus be designed close to the wheel or integrated into the wheel, for example, as a WCU ("Wheel Controlling Unit"), and arranged inside the electric motor drive unit. According to a preferred embodiment of the invention, some, preferably all, of the required electronic components of the control unit can be arranged inside the stator.

Cooling of the electronic components of the wheel-integrated electronic control unit, in particular the at least one circuit board, can be achieved particularly effectively if the sensitive electronic components, such as a circuit board, are arranged directly adjacent to the mounting plate. This preferably occurs within the interior or cavity formed by the rotor, which provides better protection for the electronic components and also saves space.

A favorable embodiment of the invention provides for the at least one printed circuit board to be arranged in such a way that it is radially aligned substantially parallel to the retaining plate. This significantly improves the cooling capability of the retaining plate. The distance between the printed circuit board and the retaining plate is chosen to be as small as possible, which improves the cooling effect of the retaining plate on the printed circuit board and thus on the electronic components of the electronic control unit.

Since the electric motor drive unit can be a high-voltage system, this can lead to, for example, The invention thus makes it possible to arrange sensitive electronic devices, such as an electronic control unit, inside the electric motor drive unit despite these unfavorable operating conditions, since these devices can be cooled directly or indirectly during operation.

According to a particularly preferred embodiment of the invention, it is provided that the at least one printed circuit board is aligned such that at least part of a side surface of the printed circuit board is in direct contact with the holding plate or the printed circuit board rests on the latter.

For this purpose, the holding plate can be equipped with corresponding, opposing recesses or receptacles in order to be able to accommodate projections or parts of the electronic components or electronic components that protrude laterally from the side surface of the circuit board, so that the contact area between the holding plate and the circuit board can be increased.

It is also possible to arrange more than one circuit board within the stator. For example, an arrangement with two, three, or even more circuit boards is possible. A favorable arrangement involves arranging the circuit boards essentially parallel to one another. It goes without saying that the circuit boards are electrically connected accordingly. Spacers can also be arranged between the circuit boards.

For the purposes of the invention, "essentially" means, with respect to a value, that a deviation of up to 10%, preferably up to 5%, and particularly preferably up to 1%, is possible between this reference value and a possible actual value. With respect to "essentially parallel," this means that the angle between the circuit board and the support plate and/or between the circuit boards themselves can be between approximately 170° and 190° or less. A precisely parallel arrangement may offer structural or geometric advantages, but is not essential to the invention.

The cooling channel of the holding plate can, for example, comprise a single channel that is laid out in windings across the surface, i.e., the circular surface of the holding plate. For a particularly good cooling effect, the cooling channel is provided particularly in those areas of the holding plate that are in contact with or directly adjacent to the circuit board, thus enabling optimal cooling of the circuit board.

In a preferred embodiment of the invention, a single continuous cooling channel is provided, which can facilitate the supply and discharge of the cooling medium, since only one connection is required. Of course, it is also possible to provide multiple cooling channels.

According to a preferred embodiment of the invention, the inlet and/or outlet of the at least one cooling channel is relocated or integrated into the wheel hub. This enables reliable transmission and flow of the cooling medium as well as simple assembly and disassembly.

According to a further preferred embodiment of the invention, it is provided that a data line for signaling connection, for example of a higher-level control unit or a vehicle bus with the electronic control unit, is laid in the wheel hub or integrated into it.

According to yet another preferred embodiment of the invention, it is provided that an electrical supply line for supplying power to the drive motor and/or the wheel brake is laid in the wheel hub or integrated therein.

The integration of all supply lines, including connections for the cooling medium, data or signal lines and/or electrical supply lines into the wheel hub thus provides a simple and combined connection concept for all lines.

In addition, the drive motor and/or the wheel brake can be controlled directly by the electronic control unit close to the wheel.

According to a preferred embodiment of the invention, the wheel brake can be arranged between the vehicle and the electric motor drive unit. A torque transmission element can be provided for attachment to the electric motor drive unit. This torque transmission element, hereinafter referred to as the transfer plate, can be designed, for example, in the shape of a disc or annulus. The transfer plate can particularly advantageously be arranged adjacent to the rotor, preferably toward the vehicle side, and connected to the rotor in a rotationally fixed manner.

The transfer plate is advantageously designed not only to provide a fastening option for the wheel brake, but also to provide the necessary stability and rigidity between the wheel brake and the drive, which is required for appropriate torque transmission.

In addition, a suitable design, such as a circular transfer plate, which can be flush with the outside of the rotor in a particularly advantageous manner, can create the possibility of closing the rotor, which can be open towards the vehicle side, accordingly.

According to a preferred embodiment of the invention, the transfer plate can comprise a central passage or opening for the passage of at least a portion of the wheel hub. This allows the wheel brake to be mounted on the side of the drive unit facing the vehicle.

According to a preferred embodiment of the invention, the wheel brake can be designed as a ring or disc brake and accordingly comprise at least one friction lining which can be in operative connection with a friction partner.

Accordingly, the part of the wheel brake that rotates during operation can comprise an annular disc in the case of a ring brake or a brake disc in the case of a disc brake as the wheel brake. The rotating part therefore refers to the part that can rotate during operation of the electric motor drive unit, for example, when a motor vehicle is moving. By pressing a friction partner, in particular a friction lining, against this rotating part, a rotating wheel can be braked in a known manner.

According to a further embodiment of the invention, the wheel brake can also be designed as a drum brake. For this purpose, it may be advantageous to design the transfer plate as part of the drum housing, for example, as a side wall. This can save installation space and weight.

A bearing can be provided between the transfer plate and the wheel hub. This allows for radial support of the transfer plate against the wheel hub, which can better absorb higher forces, such as those that can occur during sudden braking. The bearing can be designed as a roller bearing, for example.

According to a particularly preferred embodiment of the invention, it is provided that this bearing is designed to be sealed, preferably at least sealed against the ingress of solid foreign bodies and/or against the ingress of splash water, in order to prevent the ingress of foreign bodies and/or liquid into the rotor.

If, within the scope of the invention, a sealed design, such as a connection, is mentioned, this can be understood as a degree of tightness based on the IP protection class for electrical equipment. This can mean protection against foreign bodies, which corresponds to a dust-tight design (1st digit in the IP code = 6). Furthermore, protection against water can be provided, which offers protection against water during high-pressure/steam jet cleaning (2nd digit in the IP code = 9K).

The transfer plate can be connected directly to the rotor, for example, to the vehicle-side end of the rotor, for a torque-resistant connection. A connection near the outer wall of the rotor, i.e., radially as far away as possible from the wheel axle, is considered optimal for power transmission during braking.

The connection can include appropriate means for a firm and tight connection between the rotor and the transfer plate. A suitable connection can be, for example, a force-locking connection, such as a screw connection, a joining by means of plastic deformation, such as a crimp connection, or a material-to-material connection, preferably a welded connection. Since high torques must be transmitted, especially during braking, a correspondingly stable design of the connection must be ensured.

According to a particularly preferred embodiment of the invention, it is provided that the connection between the transfer plate and the rotor is designed to be tight, preferably tight as described above.

According to a preferred embodiment of the invention, both the bearing between the hub and the transfer plate, as well as the connection between the transfer plate and the rotor, can be designed to be sealed so that the rotor opening can be tightly closed. In this way, components located inside the rotor, such as an electronic control unit, can be protected.

To improve sealing, the connection between the transfer plate and the rotor can include a seal. This can be a sealant and/or a sealing ring, but in the case of a welded joint, it can also be an enclosing weld bead.

According to a preferred embodiment of the invention, an electronic control unit can be provided for controlling the drive motor and/or for controlling the wheel brake. Due to the sealing of the rotor, the electronic control unit can also be arranged within the rotor, in particular within the stator.

In a further aspect, the invention also includes a motor vehicle comprising at least one, preferably at least two electric motor drive units as described above.

Further details of the invention emerge from the description of the illustrated embodiments and the appended claims.

• 1 eine ausschnittsweise schematische Schnittansicht einer beispielhaften elektromotorischen Antriebseinheit,
• 2a, 2b eine ausschnittsweise schematische Schnittansicht weiterer beispielhafter elektromotorischen Antriebseinheiten,
• 3a, 3b, 3c eine ausschnittsweise schematische Schnittansicht weiterer beispielhaften Fügeverbindung zwischen Rotor und Transferplatte,
• 4a, 4b eine ausschnittsweise schematische Schnittansicht des Lagers zwischen Transferplatte und Radnabe,
• 5 eine ausschnittsweise schematische Schnittansicht einer weiteren beispielhaften elektromotorischen Antriebseinheit, und
• 6 eine weitere ausschnittsweise schematische Schnittansicht einer beispielhaften Fügeverbindung zwischen Rotor und Transferplatte.

The drawings show:

• 1 a partial schematic sectional view of an exemplary electric motor drive unit,
• 2a , 2b a partial schematic sectional view of further exemplary electric motor drive units,
• 3a , 3b , 3c a partial schematic sectional view of another exemplary joint connection between rotor and transfer plate,
• 4a , 4b a partial schematic sectional view of the bearing between transfer plate and wheel hub,
• 5 a partial schematic sectional view of another exemplary electric motor drive unit, and
• 6 another partial schematic sectional view of an exemplary joint connection between rotor and transfer plate.

In the following detailed description of preferred embodiments, for the sake of clarity, like reference numerals designate substantially like parts in or on these embodiments. However, to better illustrate the invention, the preferred embodiments illustrated in the figures are not always drawn to scale.

• eine Radbremse 102, wobei die Radbremse 102 zumindest einen rotierenden Anteil 40 umfasst.
• einen Antriebsmotor 101 mit einem Stator 2 und einem Rotor 12, wobei der Stator 2 innerhalb des Rotors 12 angeordnet und mit einer Radnabe 13 drehfest verbindbar oder verbunden ist,
• und wobei der Rotor 12 zumindest einen Permanentmagneten 1 umfasst, welcher zwischen dem Stator 2 und dem Rotor 12 angeordnet ist,
• und eine scheibenförmige Transferplatte 5, welche angrenzend an den Rotor 12 angeordnet und mit dem Rotor 12 drehfest verbunden ist,
• wobei die Transferplatte 5 eine zentrische Durchführung 22 zur Durchführung eines Abschnittes 24 der Radnabe 13 umfasst,
• und wobei die Transferplatte 5 mit dem rotierenden Anteil 40 der Radbremse 102 drehfest verbunden ist.

1 shows a partial schematic sectional view of an exemplary electric motor drive unit 100, in particular a wheel or wheel hub motor of a motor vehicle. The electric motor drive unit 100 comprises

• a wheel brake 102, wherein the wheel brake 102 comprises at least one rotating portion 40.
• a drive motor 101 with a stator 2 and a rotor 12, wherein the stator 2 is arranged within the rotor 12 and is rotatably connected or connected to a wheel hub 13,
• and wherein the rotor 12 comprises at least one permanent magnet 1 which is arranged between the stator 2 and the rotor 12,
• and a disc-shaped transfer plate 5, which is arranged adjacent to the rotor 12 and is connected to the rotor 12 in a rotationally fixed manner,
• wherein the transfer plate 5 comprises a central passage 22 for passing through a section 24 of the wheel hub 13,
• and wherein the transfer plate 5 is connected to the rotating portion 40 of the wheel brake 102 in a rotationally fixed manner.

The drive motor 101 is designed as a wheel or wheel hub motor. The drive motor 101 comprises a stator 2 and a rotor 12. The stator 2 is provided with corresponding electrical coil windings, which are arranged in the 1 are only shown in outline. The rotor 12 has a plurality of permanent magnets 1, although in the illustrated embodiment, only two permanent magnets 1 are visible. The permanent magnets 1 are firmly connected to the rotor.

The rotor 12 is designed as a drum or drum-like, with the permanent magnets 1 arranged on the inside of the drum facing the stator 2. The permanent magnets 1 and the stator 2 are arranged relative to one another in such a way that, during operation, a corresponding drive torque can be transferred from the stator 2 to the rotor 12 by applying an electric field, thereby driving the rotor 12. For this purpose, the air gap between the permanent magnet 1 and the stator 2 is designed to be as small as possible.

The electromagnetic drive unit 100 is controlled by an electronic control unit 17, which is responsible for both the drive control and the wheel brake control. This electronic control unit 17 is symbolized by the circuit boards 3 shown as examples. A data line 9 is provided for data transmission, which is routed through the wheel hub 13.

The stator 2 is arranged within the rotor 1, in particular within the permanent magnets 1. Furthermore, the stator 2 is connected to the wheel hub 13 in a rotationally fixed manner. The rotor 2 can be connected in a known manner to a rim which can support the wheel. Rim and wheel are in the 1 not shown.

The wheel brake 102 is arranged towards the side of the vehicle. For fastening the wheel brake 102, a torque transmission element is provided, which in the embodiment of the 1 as a disc-shaped or circular transfer plate 5. The transfer plate 5 is adjacent arranged on the rotor 12 towards the vehicle side and connected to the rotor 12.

The transfer plate 5 comprises a central passage 22 or opening for the passage of at least a portion of the wheel hub 13. This enables the installation of the wheel brake 102 on the side of the drive unit 100 facing the vehicle.

At the 1 In the illustrated embodiment of the invention, the wheel brake 102 is designed as a disc brake 41. The brake disc 7 represents the rotating part 40 of the wheel brake 102. During operation, the brake disc 7 can rotate according to the wheel speed. By pressing a friction partner, in the 1 indicated schematically by two friction linings 6, a rotating wheel can be braked in a known manner.

In another embodiment of the invention, the wheel brake 102 is designed as a ring brake 21. 2a shows a possible arrangement of this kind. An annular disc 42 is connected to the rotor 12 in a rotationally fixed manner, wherein an axial projection 20 can be provided in order to adjust a distance to the transfer plate 5. Accordingly, the annular disc 42 represents the rotating part 40 of the wheel brake 102. By pressing on friction partners, as in the 2a A rotating wheel can be braked by two friction linings 6, also indicated schematically.

According to a further embodiment of the invention, the wheel brake 102 is designed as a drum brake. 2b shows a partial schematic sectional view of an electric motor drive unit 100 with a drum brake 23. The transfer plate 5 is already designed as the wheel-side side wall of the drum, which saves installation space and weight.

A bearing 8 is provided between the transfer plate 5 and the wheel hub 13. The bearing 8 enables radial support of the transfer plate 5 on the wheel hub 13, whereby even higher forces, such as those that can occur during heavy braking, can be better absorbed and transmitted. The bearing 8 is in the embodiment of the 1 designed as rolling bearings, for example.

According to a particularly preferred embodiment of the invention, this bearing 8 is sealed, in particular at least sealed against the ingress of solid foreign bodies and/or splash water, in order to prevent the ingress of foreign bodies and/or liquid into the rotor. The illustrated embodiment of the invention is dust-tight and offers protection against water during high-pressure/steam jet cleaning.

The 4a and 4b show a partial schematic sectional view of the bearing between transfer plate and wheel hub, where in 4b an enlarged section of camp 8 from 4a is shown. In the 4b An exemplary rolling element 30 of the bearing 8 and a seal 31 can be seen, which in the exemplary embodiment is designed as a sealing ring and seals the bearing 8 towards the vehicle side.

The transfer plate 5 can be connected to the rotor 12 in various ways. 3a , 3b and 3c each show a partial schematic sectional view of exemplary joints between rotor 12 and transfer plate 5. At least one connection in the area of the outer wall of the rotor, i.e. radially as far away as possible from the wheel axis 18, is considered to be favorable for the power transmission during braking, since torques such as those generated during braking can be transmitted better in this way.

Furthermore, the connection between the transfer plate 5 and the rotor 12 in the exemplary embodiments is sealed, in particular, sealed against the ingress of solid foreign bodies and/or against the ingress of splash water. The illustrated embodiment of the invention is dust-tight and offers protection against water during high-pressure/steam jet cleaning. For this purpose, the connection has corresponding means for a firm and tight connection between the rotor and transfer plate.

In the 3a In the embodiment shown, the joint connection is designed, for example, as a force-locking connection with a screw connection 25. A seal 26 is provided for sealing, which is designed as a sealing means 38.

In the 3b The embodiment shown illustrates joining by means of plastic deformation, in this example a crimp connection 27. A sealing ring 39 is provided as the seal 26, which is arranged in the contact area between the rotor 12 and the transfer plate 5. The sealing effect occurs when the transfer plate 5 is pressed against the rotor 12.

Finally, in the 3c In the embodiment shown, a welded joint 28 is shown for connecting the transfer plate 5 and the rotor 12. A weld bead 29 is provided as a seal, which surrounds the outer edges.

5 shows a partial schematic sectional view of another exemplary electric motor drive unit 100. The wheel brake 102 is again designed as a disc brake 41 and is connected to the transfer plate 5 in the area of the bearing 8. Fixing elements 35 and screws 32 are provided for the rotationally fixed connection. Reference numeral 34 indicates the vehicle-side connection purely schematically.

6 Finally, a further partial schematic sectional view of an exemplary joint connection between wheel brake 102 and transfer plate 5 is shown.

In this embodiment, a static seal is provided between an inner ring of the bearing 8 and the adjacent parts. Furthermore, another static seal is provided between the outer ring of the bearing 8 and a fixing element 35. The brake disc 7 is held between the transfer plate 8 and the fixing element 35. The brake disc 7 is arranged coaxially to the wheel axle 18. The brake disc 7 is further fixed by the fixing element 35. Through holes for the screws of the screw connection 25 in the brake disc 7 and in the fixing element 35 are dimensioned such that minor geometric deviations in the assembly can be compensated.

In this way, a stable fixation of the brake disc 7 to the electric motor drive unit 100 can be ensured. Furthermore, centering of the brake disc 7 with the wheel axle 18 of the drive unit 100 is ensured.

The configurations shown as examples contribute to improving the stability of the drive unit 100 and reducing vibrations and noise. The design according to the invention also allows geometric deviations to be compensated.

The main seal is located in the area of bearing 8. The seal between rotor 12 and stator 2 can be limited to a relatively small diameter, which is considered advantageous. This eliminates the need for special sealing solutions, allowing the use of proven seals. The dynamic seal between rotor 12 and stator 2 is provided by the seals located in or on bearing 8.

According to a preferred embodiment of the invention, an electronic control unit can be provided for controlling the drive motor and/or for controlling the wheel brake. Due to the sealing of the rotor 12, the electronic control unit can also be arranged within the rotor 12, in particular within the stator. This is considered advantageous for weight and space reasons. In addition, the transmission paths to the actuators are very short, which further shortens response times.

In a further aspect, the invention also includes a motor vehicle comprising at least one, preferably at least two electric motor drive units 100 as described above.

List of reference symbols:

1

permanent magnet

2

stator

3

circuit board

4

holding plate

5

transfer plate

6

Friction lining

7

brake disc

8

warehouse

9

data line

10

electrical supply line

11

cooling channel

12

rotor

13

wheel hub

14

spacers

15

Entrance

16

Exit

17

control unit

18

wheel axle

19

side surface

20

Approach

21

Ring brake

22

Implementation

23

drum brake

24

Section

25

screw connection

26

seal

27

Crimp connection

28

Welded joint

29

Weld bead

30

Rolling elements

31

seal

32

screw connection

33

warehouse

34

Connection

35

Fixing element

36

wheel axle

37

Housing

38

Sealant

39

sealing ring

40

rotating part

41

disc brake

42

Ring disc

43

Drum housing

100

Electric motor drive unit

101

drive motor

102

Wheel brake

Claims (12)

Electric motor drive unit (100), in particular a wheel or wheel hub motor for a motor vehicle, comprising a wheel brake (102), wherein the wheel brake (102) comprises at least one rotating component (40). a drive motor (101) with a stator (2) and a rotor (12), wherein the stator (2) is arranged within the rotor (12) and is rotatably connected or connectable to a wheel hub (13), and wherein the rotor (12) comprises at least one permanent magnet (1) arranged between the stator (2) and the rotor (12), and a preferably disc-shaped transfer plate (5) arranged adjacent to the rotor (12) and rotatably connected to the rotor (12), wherein the transfer plate (5) comprises a central passage (22) for passing through a section (24) of the wheel hub (13), and wherein the transfer plate (5) is rotatably connected to the rotating part (40) of the wheel brake (102). Electromotive drive unit (100) according to the preceding claim, characterized in that the wheel brake (102) is designed as a ring brake (21) or disc brake (41), wherein the rotating part (40) comprises an annular disc (42) in the case of a ring brake (21) or a brake disc (7) in the case of a disc brake (41). Electromotive drive unit (100) according to one of the preceding claims, characterized in that the wheel brake (102) is designed as a drum brake (23), wherein the transfer plate (5) is preferably designed as part of the drum housing (43). Electromotive drive unit (100) according to one of the preceding claims, characterized in that a bearing (8) is provided between the transfer plate (5) and the wheel hub (13). Electromotive drive unit (100) according to one of the preceding claims, characterized in that the bearing (8) is designed to be sealed, preferably at least sealed against the ingress of solid foreign bodies and/or sealed against the ingress of splash water. Electromotive drive unit (100) according to one of the preceding claims, characterized in that the connection between the transfer plate (5) and the rotor (12) comprises a force-locking connection, in particular a screw connection (25). Electromotive drive unit (100) according to one of the preceding claims, characterized in that the connection between the transfer plate (5) and the rotor (12) comprises joining by means of plastic deformation, in particular a crimp connection (27). Electromotive drive unit (100) according to one of the preceding claims, characterized in that the connection between the transfer plate (5) and the rotor (12) comprises a material connection, in particular a welded connection (28). Electromotive drive unit (100) according to one of the preceding claims, characterized in that the connection between the transfer plate (5) and the rotor (12) is designed to be tight, preferably at least tight against the penetration of solid foreign bodies and/or tight against the penetration of splash water. Electromotive drive unit (100) according to one of the preceding claims, characterized in that the connection between the transfer plate (5) and the rotor (12) comprises a seal (26), preferably a sealing means (38) and/or a sealing ring (39), or an enclosing weld bead (29). Electromotive drive unit (100) according to one of the preceding claims, characterized in that an electronic control unit (17) is provided for controlling the drive motor (101) and/or for controlling the wheel brake (102), wherein the electronic control unit (17) is arranged within the stator (2). Motor vehicle comprising at least one, preferably at least two or more electric motors cal drive units (100) according to one of the preceding claims.

Images