Electric drive motor for a vehicle and method for selectively activating or deactivating a parking brake function for at least one wheel of a vehicle

Abstract

The invention relates to an electric drive motor for a vehicle having a rotor (10) which can be induced to rotate at least temporarily by the supply of current suitable for operating the electric drive motor, wherein the electric drive mechanism has a closing mechanism (14) having an actuator (16) and having a rotor contact part (18), and wherein the rotor contact part (18) can be adjusted by means of the actuator (16) such that the closing mechanism (14) can be selectively transferred into a rotor locking mode or a rotor release mode, wherein when the closing mechanism (14) is in its rotor locking mode, the rotor contact part (18) is in mechanical contact with the rotor (10) in such a manner that even if current suitable for operating the electric drive motor is supplied, the rotational movement of the rotor (10) is prevented, while when the closing mechanism (14) is in its rotor release mode, the rotor contact part (18) is spaced apart from the rotor (10). The invention also relates to a method for selectively activating or deactivating a parking brake function for at least one wheel of a vehicle.

Description

[0001] Description

[0002] title

[0003] Electric drive motor for a vehicle and method for selectively activating or deactivating a parking brake function for at least one wheel of a vehicle

[0004] The invention relates to an electric drive motor for a vehicle and a drive train for a vehicle. The invention also relates to a method for operating an electric drive motor of a vehicle. Furthermore, the invention relates to a method for selectively activating or deactivating a parking brake function for at least one wheel of a vehicle.

[0005] State of the art

[0006] Electric drive motors, such as the electric drive device for a vehicle described in DE 10 2021 206 193 A1, are known from the prior art.

[0007] Disclosure of the invention

[0008] The present invention provides an electric drive motor for a vehicle having the features of claim 1, a drive train for a vehicle having the features of claim 10, a method for operating an electric drive motor of a vehicle having the features of claim 11, and a method for selectively activating or deactivating a parking brake function for at least one wheel of a vehicle having the features of claim 12.

[0009] Advantages of the invention

[0010] The present invention creates possibilities for the advantageous use of an electric drive motor of a vehicle not only for driving the respective vehicle, but also for implementing a parking brake function for at least one wheel of the vehicle. In a vehicle using the present invention, it is therefore possible to dispense with the equipment of a conventional parking brake (as a separate component). Instead, by using the present invention, at least one wheel of the vehicle designed without the conventional parking brake can be blocked by means of a locking mechanism of its electric drive motor in such a way that an undesired rolling away of the vehicle from a standing surface / standing position is reliably prevented, even with a comparatively large angle of inclination of the standing surface and with relatively heavy icing of the standing surface.In contrast to a conventional parking brake, however, the locking mechanism of the electric drive motor implemented by the present invention requires fewer components, which is why "integration of the parking brake function" into the electric drive motor according to the invention is more cost-effective than the conventional parking brake. Accordingly, "integration of the parking brake function" into the electric drive motor according to the invention also results in a reduction in the installation space required in the respective vehicle. The locking mechanism, which requires fewer components than the conventional parking brake, is also less prone to failure, which is why its use enables more reliable fixation of the vehicle using the present invention compared to the prior art.

[0011] In an advantageous embodiment of the electric drive motor, when the locking mechanism is in its rotor fixing mode, the rotor contact part protrudes at least partially into a recess in the rotor such that even when the at least one conductor coil is energized with at least the predetermined minimum power suitable for operating the electric drive motor, the rotational movement of the rotor about its axis of rotation is prevented due to mechanical contact of the rotor contact part with at least one inner wall of the recess. In this way, such a strong blocking of a wheel driven by the electric drive motor can be realized / realized that an undesired rolling away of the vehicle from its standing surface / standing position is reliably prevented, even with a comparatively large angle of inclination of the standing surface and with relatively heavy icing of the standing surface.

[0012] Preferably, a plurality of recesses, each with at least one inner side wall shaped such that the rotor contact part can be at least partially inserted into the respective recess, are formed on the rotor in such a way that a line running through the recesses can be defined, which line runs circularly around the rotation axis and / or lies in a plane oriented perpendicular to the rotation axis. As will become clear from the following description, in this case the actuator of the locking mechanism can be designed comparatively inexpensively.

[0013] For example, the recesses can be formed on a first outer side of the rotor, which is penetrated by a central through-hole in the rotor through which the rotational axis passes. For the embodiment of the electric drive motor described here, an actuator can thus be used, by means of which the rotor contact part can be set into a rotary / tilting movement.

[0014] As an advantageous development, the first outer side can rest on a perforated disk-shaped region of the rotor. This makes forming the recesses comparatively simple. Furthermore, the perforated disk-shaped region can be easily fixed by means of at least one fastening component.

[0015] In an alternative embodiment of the electric drive motor, the recesses are formed on a second outer side of the rotor, which extends in the shape of a cylinder jacket around the rotation axis. As will become clear from the following description, a variety of different actuator types can be used in the embodiment described here.

[0016] As an advantageous development, the second outer side can be located on a hollow cylindrical area of ​​the rotor. This also makes forming the recesses comparatively simple.

[0017] As a further advantageous development, the electric drive motor can also have an electronic device which is designed and / or programmed in such a way that, by means of the electronic device, in response to a parking brake activation signal output to the electronic device by an input element of the vehicle that can be actuated by a driver of the vehicle and / or by an automatic system of the vehicle, the actuator of the locking mechanism can be controlled by means of at least one first control signal in such a way that the locking mechanism is transferred and / or held in its rotor fixing mode, and by means of the electronic device, in response to a parking brake deactivation signal output to the electronic device by the input element and / or by the automatic system, the actuator can be controlled by means of at least one second control signal in such a way that the locking mechanism is transferred and / or held in its rotor release mode.The embodiment of the electric drive motor described here thus has an “integrated parking brake function” which can be selectively activated or deactivated by both a driver and the vehicle’s automatic system.

[0018] The electric drive motor can, for example, be a disc motor. Thus, a conventionally widely used motor type can also be used to implement the present invention.

[0019] The advantages described above are also ensured in a drive train for a vehicle with a corresponding electric drive motor and at least one drive shaft, to which at least one wheel can be or is fastened, and which is mechanically connected to the rotor of the electric drive motor via at least one connecting component in such a way that, if the locking mechanism of the electric drive motor is in its rotor release mode, the at least one drive shaft can be set into a respective rotational movement about a respective drive shaft longitudinal axis extending along the respective drive shaft by means of the rotor set in its rotational movement about the rotation axis, while, if the locking mechanism is in its rotor fixing mode,The respective rotational movement of the at least one drive shaft about the respective drive shaft longitudinal axis is prevented due to the mechanical contact of the rotor contact part of the locking mechanism with the rotor. The embodiment described here thus utilizes the special properties of the drive train to implement a parking brake function, which can be selectively activated or deactivated without equipping the vehicle with a conventional parking brake. The "integrated parking brake function" described here also requires comparatively few components, which is why the installation space requirement and / or weight of the drive train described here are hardly increased compared to the prior art. In addition, the drive train described here can be manufactured comparatively cost-effectively.

[0020] Likewise, a corresponding method for operating an electric drive motor of a vehicle also achieves the advantages described above. The method for operating an electric drive motor can also be further developed according to the above-explained embodiments of electric drive motors. Furthermore, executing a corresponding method for selectively activating or deactivating a parking brake function for at least one wheel of a vehicle also achieves the advantages explained above. The method for selectively activating or deactivating a parking brake function can also be further developed according to the above-explained embodiments of the electric drive motor.

[0021] Short description of the drawings

[0022] Further features and advantages of the present invention are explained below with reference to the figures. They show:

[0023] Fig. 1 is a schematic representation of a first embodiment of the electric drive motor;

[0024] Figs. 2a and 2b show a side view and a plan view of a second embodiment of the electric drive motor;

[0025] Figs. 3a and 3b show a side view and a plan view of a third embodiment of the electric drive motor;

[0026] Figs. 4a and 4b show a side view and a plan view of a fourth embodiment of the electric drive motor;

[0027] Fig. 5a and 5b are a side view and a plan view of a fifth embodiment of the electric drive motor; and

[0028] Fig. 6 is a flowchart for explaining an embodiment of the method for operating an electric drive motor of a vehicle.

[0029] Embodiments of the invention

[0030] Fig. 1 shows a schematic representation of a first embodiment of the electric drive motor. The electric drive motor schematically illustrated in Fig. 1 can be used to drive the wheels of a vehicle / motor vehicle. It should be noted that the usability of the electric drive motor is not limited to any specific vehicle type / motor vehicle type.

[0031] The electric drive motor has a rotor 10, which can be set into a rotational movement about a rotational axis 12 of the rotor 10 in relation to a stator (not shown) of the electric drive motor, at least temporarily, by means of a current supply suitable for operating the electric drive motor to at least one (not sketched) conductor coil of the electric drive motor, each with at least a predetermined minimum power. The electric drive motor also has a locking mechanism 14, which comprises at least one actuator 16 and a rotor contact part 18. The rotor contact part 18 is adjustable by means of the actuator 16 such that the locking mechanism 14 can be set into a so-called rotor fixing mode or a so-called rotor release mode.When the locking mechanism 14 is in its rotor fixing mode, the rotor contact part 18 is in mechanical contact with the rotor 10 such that even when the at least one conductor coil is energized with at least the predetermined minimum power suitable for operating the electric drive motor, the rotational movement of the rotor 10 about its rotational axis 12 is / is prevented due to the mechanical contact of the rotor contact part 18 with the rotor 10.This can also be described as meaning that, while the locking mechanism 14 is in its rotor fixing mode, the rotor contact part 18 “touches” the rotor 10 in such a way that, due to the contact between the rotor contact part 18 and the rotor 10, the rotational movement of the rotor 10 about its rotational axis 12 is prevented, even by means of a current supply to the at least one conductor coil suitable for operating the electric drive motor, each with at least the predetermined minimum power.

[0032] In contrast, the rotor release mode is understood to be a mode of the locking mechanism 14 during which the rotor contact part 18 is spaced from the rotor 10 such that the rotor 10 can be set into rotational movement about the rotational axis 12 by means of the current supply to the at least one conductor coil suitable for operating the electric drive motor, each with at least the predetermined minimum power. Due to the spaced position of the rotor contact part 18 from the rotor 10 when the locking mechanism 14 is in its rotor release mode, the locking mechanism 14 thus (substantially) does not impede the driven rotational movement of the rotor 10 about its rotational axis 12. Preferably, when the locking mechanism is in its rotor release mode, no friction occurs between the rotor 10, which is set into its rotational movement about the rotational axis 12, and the rotor contact part 18.

[0033] By transferring the locking mechanism 14 to its rotor fixing mode, the rotor 10 can be fixed in such a way that the rotational movement of the rotor 10 about its rotational axis 12 is prevented. This can also be used to block at least one component mechanically connected to the rotor 10 via at least one connecting component, such as in particular at least one drive shaft and possibly also at least one wheel fastened to the at least one drive shaft. Therefore, the locking mechanism 14 can also fulfill the function of a conventional parking brake in that, by transferring the locking mechanism 14 to its rotor fixing mode, the at least one wheel is blocked in such a way that an undesired rolling away of the vehicle from its current standing surface is prevented, even with a comparatively large angle of inclination of the standing surface and with relatively heavy icing of the standing surface.By using the electric drive motor described here, the vehicle does not need to be equipped with a conventional parking brake.

[0034] As can be seen from Fig. 1, the electric drive motor described here uses its rotor 10 as a parking brake wheel when used as a parking brake. Due to this multifunctionality of the rotor 10, fewer separate components are required to integrate the parking brake function into the electric drive motor than are required for a conventional parking brake. Integrating the parking brake function into the electric drive motor is therefore generally more cost-effective than equipping the vehicle equipped with it with its own parking brake. Likewise, integrating the parking brake function does not / barely increase the installation space required for the electric drive motor, so that eliminating the conventional parking brake frees up a relatively large amount of installation space on the vehicle.At the same time, the electric drive motor with the "integrated parking brake" features a modular design, which significantly simplifies its installation in the motor vehicle equipped with it. It should also be noted that when the rotor 10 is used as a parking brake wheel, a greater blocking force can be applied to the at least one wheel connected to the rotor 10 via the at least one connecting component than is generally possible with a conventional parking brake.

[0035] When the locking mechanism 14 is in its rotor-locking mode, the rotor contact part 18 preferably projects at least partially into a recess 20 of the rotor 10. In this way, it can be ensured that even when the at least one conductor coil is energized with at least the predetermined minimum power suitable for operating the electric drive motor, the rotational movement of the rotor 10 about its rotational axis 12 is / is prevented due to mechanical contact of the rotor contact part 18 with at least one inner side wall 22 of the recess 20. For this purpose, a plurality of recesses 20, each with at least one inner side wall 22, which is shaped such that the rotor contact part 18 can be at least partially inserted into the respective recess 20, can be formed on the rotor 10.The at least one recess 20 can be understood as a hole protruding into the rotor 10 and / or a space between two adjacent projections of the rotor 10. In particular, at least one flux barrier of the rotor 10 can often also be used as the at least one recess 20. The at least one inner side wall 22 of the at least one recess 20 can be shaped such that the rotor contact part 18 protruding at least partially into the respective recess 20 is surrounded by (almost) directly adjacent inner side wall surfaces of the respective recess. Alternatively, however, there can also be a clearance between the rotor contact part 18 protruding at least partially into the respective recess 20 and the surrounding inner side wall surfaces of the respective recess 20.

[0036] Preferably, the recesses 20, into which the rotor contact part 18 can be at least partially inserted, are formed on the rotor 10 such that a line 24 running through the recesses 20 can be defined, which line runs in a circle around the rotation axis 12. The line 24 can in particular lie in a plane oriented perpendicular to the rotation axis 12. This allows a comparatively simple design of the actuator 16 for selectively pushing in or pulling out the rotor contact part 18 from one of the recesses 20. In the embodiment of Fig. 1, the actuator 16 of the locking mechanism 14 is designed such that the rotor contact part 18 can be adjusted by means of the actuator 16 along an adjustment direction 26 that intersects the rotation axis 12 of the rotor 10 perpendicularly.For this purpose, a camshaft 28 of the actuator with a cam 30 can be rotated about an axis 32 oriented perpendicular to the rotational axis 12 of the rotor 10 and to the adjustment direction 26 by means of a motor (not shown) of the actuator 16. By means of the rotational movement of the camshaft 28 together with the cam 30 about the axis 32, the rotor contact part 18 can be adjusted along the adjustment direction 26 in the direction of the rotational axis 12 of the rotor 10. In addition, the actuator 16 has a spring 34, by means of which the rotor contact part 18 is supported on a housing 36 of the actuator 16 in such a way that the spring 34 is deformed by adjusting the rotor contact part 18 along the adjustment direction 26 in the direction of the rotation axis 12 of the rotor 10, and therefore the rotor contact part 18 can subsequently be pulled away from the rotation axis 12 along the adjustment direction 26 by means of a spring force of the spring 34.

[0037] Optionally, the electric drive motor can also have an electronic device 38, by means of which control signals 40a and 40b can be output to the actuator 16 / its motor. Preferably, the electronic device 38 is designed and / or programmed such that, in response to a parking brake activation signal 42a output to the electronic device 38, the actuator 16 / its motor can be controlled by means of at least one first control signal 40a of the electronic device 38 such that the locking mechanism 14 is transferred to its rotor locking mode and / or is held.Accordingly, it is advantageous if the design / programming of the electronic device 38 ensures that, in response to a parking brake deactivation signal 42b output to the electronic device 38, the actuator 16 / its motor can be controlled by means of at least one second control signal 40b of the electronic device 38 such that the locking mechanism 14 is transferred to its rotor release mode and / or is held. The parking brake activation signal 42a and / or the parking brake deactivation signal 42b can be output to the electronic device 38 by an input element (not shown) of the vehicle, which can be actuated by the driver of the vehicle to selectively activate or deactivate a parking brake function of his vehicle, and / or by an automatic system (not shown) of the vehicle.This means that the driver of the vehicle and / or the automatic system of the vehicle, even without the vehicle being equipped with a conventional parking brake, has the option of either requesting a blocking of the at least one wheel mechanically connected to the rotor 10 via the at least one connecting component or a release of the blocking of the at least one wheel.

[0038] Alternatively, however, the electric drive motor may also be omitted from the electronic device 38. Instead, at least one control unit of the vehicle, such as a dedicated control unit of the electric drive motor or a central control unit / central control unit of the vehicle, may be designed and / or programmed to control the actuator 16 / its motor upon request to lock the at least one wheel or to unlock the at least one wheel, for example by the driver and / or the automatic system, such that the locking mechanism 14 is transferred and / or held in its rotor fixing mode or its rotor release mode.

[0039] Fig. 2a and 2b show a side view and a top view of a second embodiment of the electric drive motor.

[0040] In contrast to the previously described embodiment, the locking mechanism 14 of the electric drive motor of Figs. 2a and 2b has an actuator 16, by means of which the rotor contact part 18 can be pivoted / is pivoted into a rotational / tilting movement about an axis 44 extending through a first end section of the rotor contact part 18, whereby a second end section of the rotor contact part 18 is selectively brought into mechanical contact with the rotor 10 or is / is moved away from the rotor 10. As can also be seen in Figs. 2a and 2b, in the embodiment described here, the recesses 20 are formed on a first outer surface 46 of the rotor 10, which is pierced by a central through-hole 48 of the rotor 10, through which the rotational axis 12 extends.For example only, the recesses 20 are formed as intertooth spaces between each two adjacent teeth 50, which protrude on the rotor 10, specifically on its first outer side 46. However, this should not be interpreted as restrictive. As an optional development, as indicated in Fig. 2a by the dashed line 52, the first outer side 46 can also be located on a perforated disk-shaped region of the rotor 10. The perforated disk-shaped region can optionally be formed from at least one non-ferromagnetic material and / or from at least one ferromagnetic material. In particular, the perforated disk-shaped region can be made of aluminum.

[0041] With regard to further features and properties of the electric drive motor of Figs. 2a and 2b and their advantages, reference is made to the previously described embodiment of Fig. 1.

[0042] Fig. 3a and 3b show a side view and a top view of a third embodiment of the electric drive motor.

[0043] In the electric drive motor of Figs. 3a and 3b, the recesses 20 are formed on a second outer side 54 of the rotor 10, which extends in the shape of a cylindrical shell around the rotational axis 12 of the rotor 10. In particular, the recesses 20 are each formed as a hole extending into the rotor 10, specifically as a hole penetrating the second outer side 54 of the rotor 10. In this case, flux barriers of the rotor 10 can be used as the recesses / holes 20 that interact with the locking mechanism 14.

[0044] With regard to further features and properties of the electric drive motor of Figs. 3a and 3b and their advantages, reference is made to the previously described embodiments of Figs. 1 and 2.

[0045] Fig. 4a and 4b show a side view and a top view of a fourth embodiment of the electric drive motor.

[0046] 4a and 4b, the second outer side 54 of the rotor 10 lies on a hollow cylindrical region 56 of the rotor 10. The hollow cylindrical region 56 can optionally be formed from at least one non-ferromagnetic material and / or from at least one ferromagnetic material. The hollow cylindrical region 56 can be made of aluminum, for example. The recesses 20 can each be designed as a hole protruding into the hollow cylindrical region 56, specifically as a hole penetrating the hollow cylindrical region 56. For example, the hollow cylindrical region 56 can be fastened to a core region 60 of the rotor 10 by means of at least one fastening element 58, in that the at least one fastening element 58, starting from an outer side of the hollow cylindrical region 56 directed away from the core region 60, is partially inserted into at least one recess 62 formed in the core region 60.Optionally, at least one flow barrier of the core region 60 can be used as the at least one recess 62 for fixing the hollow cylindrical region 56 to the core region 60.

[0047] The at least one fastening element 58 can, for example, be a pin, a screw, or a press-fit part. If the hollow cylindrical region 56 consists of at least one non-ferromagnetic material, the at least one fastening element 58 is preferably also made of a non-ferromagnetic material. For example, the at least one fastening element 58 can be made of aluminum.

[0048] With regard to further features and properties of the electric drive motor of Figs. 4a and 4b and their advantages, reference is made to the previously described embodiments of Figs. 1 to 3.

[0049] Fig. 5a and 5b show a side view and a top view of a fifth embodiment of the electric drive motor.

[0050] In contrast to the previously described embodiment, in the electric drive motor of Figs. 5a and 5b the recesses 20 are formed as inter-tooth spaces between each two adjacent teeth 50, which protrude on the hollow cylindrical region 56.

[0051] With regard to further features and properties of the electric drive motor of Figs. 5a and 5b and their advantages, reference is made to the previously described embodiments of Figs. 1 to 4.

[0052] In all of the embodiments explained above, the electric drive motor can be a disk-type motor (axial flux motor) or a disk-type machine (axial flux machine). The electric drive motor can, in particular, be an axial flux synchronous reluctance motor (axial flux synchronous reluctance motor) or an axial flux permanent magnet synchronous motor (axial flux permanent magnet synchronous motor). Thus, advantageous motor types can be used for the present invention.

[0053] Each of the electric drive motors described above can be part of a drive train for a vehicle. The respective drive train then has, in addition to its electric drive motor, at least one drive shaft to which at least one wheel can be or is fastened. The at least one drive shaft is mechanically connected to the rotor 10 of the electric drive motor via at least one connecting component in such a way that, provided the locking mechanism 14 of the electric drive motor is in its rotor release mode, the at least one drive shaft can be set / is set into a respective rotational movement about a respective drive shaft longitudinal axis extending along the respective drive shaft by means of the rotor 10 set in its rotational movement about the rotation axis 12.At the same time, provided the locking mechanism 14 is in its rotor-locking mode, the respective rotational movement of the at least one drive shaft about the respective drive shaft longitudinal axis is prevented due to the mechanical contact of the rotor contact part 18 of the locking mechanism with the rotor 10. The drive train described here can thus perform a parking brake function even without being equipped with a conventional parking brake, by means of which at least one wheel can be selectively locked / locked or released / released.

[0054] Fig. 6 shows a flowchart for explaining an embodiment of the method for operating an electric drive motor of a vehicle.

[0055] It should be noted that the feasibility of the method described below is not limited to any specific vehicle type / motor vehicle type. In a method step S1, a locking mechanism of the electric drive motor comprising an actuator and a rotor contact part adjustable by the actuator is transferred from a rotor locking mode to a rotor release mode. The locking mechanism is transferred from the rotor locking mode to the rotor release mode by adjusting the rotor contact part by the actuator such that the rotor contact part is spaced from the rotor when the locking mechanism is in its rotor release mode.This means that the rotor contact part is spaced from the rotor in such a way that the rotor is set into a rotational movement about a rotational axis of the rotor in relation to a stator of the electric drive motor by means of a current supply suitable for operating the electric drive motor to at least one conductor coil of the electric drive motor, each with at least a predetermined minimum power.

[0056] In another method step S2, the locking mechanism is transferred from the rotor release mode to the rotor locking mode. For this purpose, in method step S2, the rotor contact part is adjusted by means of the actuator such that the rotor contact part is in mechanical contact with the rotor when the locking mechanism is in its rotor locking mode. The mechanical contact of the rotor contact part with the rotor is so "strong" that even when the at least one conductor coil is energized with at least the predetermined minimum power suitable for operating the electric drive motor, the rotational movement of the rotor about its rotational axis is prevented due to the mechanical contact of the rotor contact part with the rotor.

[0057] Method steps S1 and S2 can be carried out alternately. Method steps S1 and S2 are particularly suitable for selectively activating or deactivating a parking brake function for at least one wheel of the vehicle. Carrying out method step S1 ensures that at least one drive shaft, which is mechanically connected to the rotor of the electric drive motor via at least one connecting component, is set into a respective rotational movement about a respective drive shaft longitudinal axis extending along the respective drive shaft by means of the rotor set in its rotational movement about the rotation axis. This ensures that the at least one wheel, which is fastened to the at least one drive shaft, also rotates. By means of method step S1, an existing parking brake function for the at least one wheel can thus be deactivated.In contrast, by executing method step S2, at least one wheel is blocked.

[0058] Method step S2 thus activates a parking brake function for at least one wheel, which can be deactivated again at a later time by repeating method step S1.

Claims

Claims 1. An electric drive motor for a vehicle, comprising: a rotor (10) which can be set into a rotational movement about a rotational axis (12) of the rotor (10) relative to a stator of the electric drive motor, at least temporarily, by means of a current supply suitable for operating the electric drive motor to at least one conductor coil of the electric drive motor, each with at least a predetermined minimum power; characterized by a locking mechanism (14) with an actuator (16) and a rotor contact part (18), wherein the rotor contact part (18) is adjustable by means of the actuator (16) such that the locking mechanism (14) can be selectively converted into a rotor fixing mode or into a rotor release mode, wherein the rotor contact part (18) is in mechanical contact with the rotor (10) when the locking mechanism (14) is in its rotor fixing mode.that even when the at least one conductor coil is energized with at least the predetermined minimum power in a manner suitable for operating the electric drive motor, the rotational movement of the rotor (10) about its axis of rotation (12) is prevented due to the mechanical contact of the rotor contact part (18) with the rotor (10), while the rotor contact part (18) is spaced from the rotor (10) in the presence of the locking mechanism (14) in its rotor release mode in such a way that the rotor (10) can be set into rotational movement about the axis of rotation (12) by means of the energization of the at least one conductor coil in a manner suitable for operating the electric drive motor with at least the predetermined minimum power.

2. Electric drive motor according to claim 1, wherein the rotor contact part (18) when the locking mechanism (14) is in its rotor fixing mode projects at least partially into a recess (20) of the rotor (10) such that even in the case of a Drive motor suitable current supply to the at least one conductor coil with at least the predetermined minimum power, the rotational movement of the rotor (10) about its rotational axis (12) is prevented due to mechanical contact of the rotor contact part (18) with at least one inner side wall (22) of the recess (20).

3. Electric drive motor according to claim 2, wherein a plurality of recesses (20), each having at least one inner side wall (22) which is shaped such that the rotor contact part (18) can be at least partially introduced into the respective recess (20), are formed on the rotor (10) in such a way that a line (24) running through the recesses (20) can be defined, which line runs in a circle around the axis of rotation (12) and / or lies in a plane oriented perpendicular to the axis of rotation (12).

4. Electric drive motor according to claim 3, wherein the recesses (20) are formed on a first outer side (46) of the rotor (10), which is pierced by a central through-hole (48) of the rotor (10) through which the rotational axis (12) extends.

5. Electric drive motor according to claim 4, wherein the first outer side (46) lies on a perforated disk-shaped region of the rotor (10).

6. Electric drive motor according to claim 3, wherein the recesses (20) are formed on a second outer side (54) of the rotor (10), which extends in the shape of a cylinder jacket around the axis of rotation (12).

7. Electric drive motor according to claim 6, wherein the second outer side (54) lies on a hollow cylindrical region (56) of the rotor (10).

8. Electric drive motor according to one of the preceding claims, wherein the electric drive motor has an electronic device (38) which is designed and / or programmed in such a way that by means of the electronic device (38) in response to a signal from a The actuator (16) of the locking mechanism (14) can be controlled by means of at least one first control signal (40a) in such a way that the locking mechanism (14) is transferred and / or held in its rotor fixing mode by means of an input element of the vehicle that can be actuated by the driver of the vehicle and / or by an automatic system of the vehicle to the electronic device, and the actuator (16) can be controlled by means of at least one second control signal (40b) in such a way that the locking mechanism (14) is transferred and / or held in its rotor release mode by means of the electronic device (38) in response to a parking brake deactivation signal (42b) that is output by the input element and / or by the automatic system to the electronic device (38).

9. Electric drive motor according to one of the preceding claims, wherein the electric drive motor is a disc rotor motor.

10. Drive train for a vehicle comprising: an electric drive motor according to any one of the preceding claims;and at least one drive shaft, to which at least one wheel can be or is fastened, and which is mechanically connected to the rotor (10) of the electric drive motor via at least one connecting component in such a way that, if the locking mechanism (14) of the electric drive motor is in its rotor release mode, the at least one drive shaft can be set into a respective rotary movement about a respective drive shaft longitudinal axis extending along the respective drive shaft by means of the rotor (10) set in its rotational movement about the rotation axis (12), while, if the locking mechanism (14) is in its rotor fixing mode, the respective rotary movement of the at least one drive shaft about the respective drive shaft longitudinal axis is prevented due to the mechanical contact of the rotor contact part (18) of the locking mechanism (14) with the rotor (10).

11. A method for operating an electric drive motor of a vehicle comprising the steps: Transferring a locking mechanism (14) of the electric drive motor, comprising an actuator (16) and a rotor contact part (18) adjustable by means of the actuator (16), from a rotor fixing mode to a rotor release mode by adjusting the rotor contact part (18) by means of the actuator (16) such that, when the locking mechanism (14) is in its rotor release mode, the rotor contact part (18) is spaced from the rotor (10) such that the rotor (10) is set into a rotational movement about a rotational axis (12) of the rotor (10) in relation to a stator of the electric drive motor by means of a current supply suitable for operating the electric drive motor to at least one conductor coil of the electric drive motor, each with at least a predetermined minimum power (S1); and Transferring the locking mechanism (14) from the rotor release mode to the rotor fixing mode by adjusting the rotor contact part (18) by means of the actuator (16) such that the rotor contact part (18) is in mechanical contact with the rotor (10) when the locking mechanism (14) is in its rotor fixing mode such that even when the at least one conductor coil is energized with at least the predetermined minimum power in a manner suitable for operating the electric drive motor, the rotational movement of the rotor (10) about its rotational axis (12) is prevented due to the mechanical contact of the rotor contact part (18) with the rotor (10) (S2).

12. A method for selectively activating or deactivating a parking brake function for at least one wheel of a vehicle, comprising the steps: Transferring a locking mechanism (14) of the electric drive motor with an actuator (16) and a rotor contact part (18) adjustable by means of the actuator (16) from a rotor fixing mode into a Rotor release mode by adjusting the rotor contact part (18) by means of the actuator (16) such that the rotor contact part (18) is spaced from the rotor (10) when the locking mechanism (14) is present in its rotor release mode such that the rotor (10) is set into a rotational movement about a rotational axis (12) of the rotor (10) in relation to a stator of the electric drive motor by means of a current supply suitable for operating the electric drive motor to at least one conductor coil of the electric drive motor, each with at least a predetermined minimum power (S1), whereby at least one drive shaft, which is mechanically connected to the rotor (10) via at least one connecting component, is set into a respective rotational movement about a respective drive shaft longitudinal axis extending along the respective drive shaft by means of the rotor (10) set into its rotational movement about the rotational axis (12), and the at least one wheel,which is attached to at least one drive shaft, is rotated; and, Transferring the locking mechanism (14) from the rotor release mode to the rotor fixing mode by adjusting the rotor contact part (18) by means of the actuator (16) such that the rotor contact part (18) is in mechanical contact with the rotor (10) when the locking mechanism (14) is in its rotor fixing mode such that even when the at least one conductor coil is energized with at least the predetermined minimum power in a manner suitable for operating the electric drive motor, the rotational movement of the rotor (10) about its axis of rotation (12) is prevented (S2) due to the mechanical contact of the rotor contact part (18) with the rotor (10), whereby the at least one wheel is blocked.

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