Electric wheel hub driving device

Abstract

The invention relates to an electric wheel hub drive (1) for a motor vehicle, comprising a wheel carrier (2), which has a wheel bearing (29), which has a first bearing ring (31), which is connected to the wheel carrier (2) in a rotationally fixed manner, and a second bearing ring (32), which is arranged so as to be rotatable relative to a main axis of rotation (A); the electric hub drive has an electric machine (3) having a stator (4) and a rotor (5) arranged in a rotatable manner about the main axis of rotation (A); the electric wheel hub driving device is provided with a stator support (6) which is connected with the wheel carrier (2) in a torsion-proof manner; the electric hub drive has a rotor carrier (7) which is connected to the rotor (5) in a rotationally fixed manner and which is mounted in a rotatable manner relative to the wheel carrier (2). Wherein the disconnect clutch (13) has a first clutch half (46), which is connected in a rotationally fixed manner to the rotor support (7), and a second clutch half (47), which is connected in a rotationally fixed manner to the second bearing ring (32), and wherein the first clutch half (46) of the disconnect clutch (13) is arranged in an axially displaceable manner on an outer bearing shell of the rotor bearing (17).

Description

Technical Field

[0001] The present invention relates to an electric wheel hub drive device according to the preamble of claim 1. Background Art

[0002] For an electric wheel hub drive device for a motor vehicle, a disconnect clutch (Disconnect device) can be used. The disconnect clutch can have a sliding sleeve that requires a matching sliding surface.

[0003] Electric wheel hub drive devices are known, for example, from JP 2020-128 134A and DE 10 2022 000 035 A1.

[0004] US2020 / 0 287 495A1 describes a control device for an electric motor having a first set of coil windings arranged to form a first sub-motor and a second set of coil windings arranged to form a second sub-motor, wherein the current in the first set of coil windings is controlled using a first pulse width modulation (PWM) having a first switching sequence, the current in the second set of coil windings is controlled using a second pulse width modulation (PWM) having a second switching sequence, wherein the control device includes means arranged to measure the current in each coil winding of the first set of coil windings, and wherein when it is determined that the sum of the currents in the first set of coil windings is substantially non-zero, the first PWM value is derived from the voltage value for generating the second PWM. Summary of the Invention

[0005] The object of the present invention is to provide a new type of electric wheel hub drive device.

[0006] According to the present invention, this object is achieved by an electric wheel hub drive device having the features of claim 1.

[0007] Advantageous designs of the present invention are the subject matter of the dependent claims.

[0008] Within the scope of the present application, the term "anti-torsional" is used as follows: If two elements are arranged coaxially with respect to each other (with respect to their axis of rotation or with respect to an axis of rotational symmetry) and they are connected to each other such that they always rotate with the same angular velocity, then these two elements are connected to each other in an anti-torsional manner. If an element cannot rotate relative to the housing, then this element is connected to the housing in an anti-torsional manner.

[0009] Within the scope of the present application, the term "radially overlapping" is used as follows: If two elements (especially substantially rotationally symmetric elements) are at least each partly arranged within a region of the same radial coordinate (and especially the same angular coordinate), then these two elements are arranged to be radially overlapping with respect to a common axis.

[0010] Within the scope of the present application, the term "axially overlapping" is used in the following manner: If two elements are arranged at least partially within the region of the same axial coordinate, then these two elements are arranged axially overlapping with respect to a common axis.

[0011] Within the scope of the present application, the term "radially internal" is used in the following manner: If a first element is arranged in a region with a smaller radius compared to a second element, then the first element is arranged radially internal to the second element with respect to a common axis.

[0012] According to the present invention, an electric wheel hub drive device for a motor vehicle is provided. The electric wheel hub drive device has a wheel carrier; the electric wheel hub drive device has a wheel bearing, the wheel bearing having a first bearing ring connected to the wheel carrier in a torsion-resistant manner and a second bearing ring arranged to be rotatable relative to a main rotational axis; the electric wheel hub drive device has an electric motor, the electric motor having a stator and a rotor arranged to be rotatable about the main rotational axis; the electric wheel hub drive device has a stator support connected to the wheel carrier in a torsion-resistant manner; the electric wheel hub drive device has a rotor support connected to the rotor in a torsion-resistant manner and supported to be rotatable relative to the wheel carrier. A disconnect clutch is provided according to the present invention, the disconnect clutch having a first clutch half connected to the rotor support in a torsion-resistant manner and a second clutch half connected to the second bearing ring in a torsion-resistant manner, wherein the first clutch half is arranged to be axially displaceable relative to the outer bearing shell of the rotor bearing. According to the present invention, the first clutch half is arranged to radially surround the outer bearing shell of the rotor bearing and at least partially axially overlap with the outer bearing shell surrounding the rotor bearing. The outer bearing shell of the rotor bearing is also referred to as the third bearing ring hereinafter.

[0013] In one embodiment, an axial displacement device is provided, the axial displacement device being designed to axially displace the first clutch half, wherein the axial displacement device has a pinion gear axially arranged between the first clutch half and the wheel carrier.

[0014] In one embodiment, the pinion gear is arranged to radially overlap the first clutch half, i.e., at least partially within the region of the same radius.

[0015] In one embodiment, the axial displacement device has a first bevel ring coupled to the pinion gear via tooth engagement and a second bevel ring connected to the stator support in a torsion-resistant manner via a slot in the stator support, wherein the bevel rings are arranged adjacent to each other axially and have respective bevel surfaces that engage with each other and are designed such that the torsion of the first bevel ring relative to the second bevel ring causes the axial displacement of the second bevel ring.

[0016] In one embodiment, a servo motor is provided, which is arranged on a side of the wheel carrier facing away from the first and second clutch halves, wherein the shaft is torsionally connected to the rotor of the servo motor and torsionally connected to the pinion.

[0017] In one embodiment, the second inclined surface ring is torsionally connected to the shift fork, and the shift fork engages in a groove of the first clutch half.

[0018] In one embodiment, a return spring acting parallel to the main rotation axis is provided, and the return spring is arranged such that it is supported on the second inclined surface ring on one hand and directly or indirectly supported on the rotor bracket on the other hand.

[0019] In one embodiment, the rotation axis of the servo motor is arranged parallel to the main rotation axis.

[0020] In one embodiment, the wheel carrier has a hole, and the shaft is guided through the hole.

[0021] In one embodiment, a covering part is provided, which is arranged on a side of the servo motor facing away from the wheel carrier above the servo motor.

[0022] The disengaging clutch within the scope of the present invention includes two clutch halves (for example, as a claw clutch or a form-fitting clutch; alternatively, a multi-plate clutch or a friction clutch can also be used). The term "disengaging clutch" can also include a sliding sleeve formed by the first clutch half, wherein the second clutch half of the disengaging clutch is advantageously directly torsionally connected to or formed by the brake disc bracket. However, the second clutch half can also be designed as a separate claw tooth part, which is also torsionally connected to the second bearing ring.

[0023] The term "actuator of the disengaging clutch" includes all components provided upstream of the first clutch half: servo motor, adjusting shaft, pinion, axial displacement device (having a pinion, a first inclined surface ring, a second inclined surface ring, and optionally balls arranged in the middle).

[0024] Advantageously, the function of the sliding surface for the first clutch half is integrated in the rotor bearing, so that almost no additional installation space is required. Here, the outer surface of the rotor bearing can simultaneously form the sliding surface for the first clutch half. In this way, the weight, cost, and installation space are reduced. Description of the Drawings

[0025] Embodiments of the present invention will be explained in more detail below with reference to the drawings.

[0026] Wherein:

[0027] Figure 1 Schematic view showing an electric wheel hub drive device for a motor vehicle; and

[0028] Figure 2 Schematic detailed view showing the electric wheel hub drive device. DETAILED DESCRIPTION

[0029] Parts corresponding to each other in all the figures are denoted by the same reference numerals.

[0030] Figure 1 Schematic view showing an electric wheel hub drive device 1 for a motor vehicle, which electric wheel hub drive device has a wheel carrier 2; has an electric motor 3 which has a stator 4 and a rotor 5 arranged so as to be rotatable about a main rotational axis A; has a stator support 6 which is torsionally rigidly connected to the wheel carrier 2; has a rotor support 7 which is torsionally rigidly connected to the rotor 5 and is supported so as to be rotatable relative to the wheel carrier 2, wherein the stator support 6 has a disc-shaped part 8 and a cylindrical part 9, and wherein the cylindrical part 9 is arranged radially outside the disc-shaped part 8. The disc-shaped part 8 has a first passage 10 for the shaft 11 of a servo motor 12 for a separating clutch 13, wherein the separating clutch 13 is arranged radially inside the cylindrical part 9.

[0031] In one embodiment, the disc-shaped part 8 has a second passage 14 for a bolt connection 15 which is designed to connect the disc-shaped part 8 to the wheel carrier 2 in a torsionally rigid manner.

[0032] In one embodiment, the second passage 14 is arranged substantially in a region having the same radius as the first passage 10.

[0033] In one embodiment, the cylindrical part 9 has at least one channel 16 which is designed to accommodate a coolant.

[0034] In one embodiment, a rotor bearing 17 is provided for the rotational support of the rotor 5 and is arranged radially inside and axially overlapping the channel 16.

[0035] In one embodiment, the separating clutch 13 also has a second bevel ring 18 arranged radially inside the cylindrical part 9, wherein the bevel ring 18 is torsionally rigidly connected to the cylindrical part 9 and is axially displaceable relative to the cylindrical part 9.

[0036] In one embodiment, the cylindrical part 9 has at least one groove 19 on its radial inner side which is parallel to the main rotational axis A, and wherein the bevel ring 18 is connected to at least one pin 20, and each of the pins engages in one of the grooves 19.

[0037] In one embodiment, the cylindrical part 9 has, on its radial outer side, a sealing surface for a seal 21, in particular a radial seal, relative to the rotor support 7.

[0038] In one embodiment, the sealing surface is arranged axially between the stator 4 and the brake disc 22.

[0039] The rotor bearing 17 is part of a combined bearing 28 which also includes a wheel bearing 29, wherein the combined bearing 28 has a third bearing ring 30 designed as an outer bearing shell, a first bearing ring 31 designed as a middle bearing shell and a second bearing ring 32 designed as an inner bearing shell, wherein a plurality of rolling elements 33 are arranged between the third bearing ring 30 (outer bearing shell) forming the rotor bearing 17 and the first bearing ring 31 (middle bearing shell), and wherein a plurality of rolling elements 33 are arranged between the first bearing ring 31 (middle bearing shell) forming the wheel bearing 29 and the second bearing ring 32 (inner bearing shell).

[0040] The brake disc 22 can be designed as an Inside-Out brake disc and is arranged at a brake disc support 23 which is torsionally rigidly connected to the rim 24. The rim 24 and the brake disc support 23 are torsionally rigidly connected to the second bearing ring 32 (inner bearing shell) of the wheel bearing 29 via several wheel bolts 27.

[0041] Another radial seal 25 can be arranged between the brake disc support 23 and the rotor support 7.

[0042] The inclined plane ring 18 is connected to a first clutch half 46 which is supported in the rotor support 7 in such a way that it can be axially displaced in a corresponding passage 37 and is designed to optionally engage with a second clutch half 47. The second clutch half 47 is torsionally rigidly connected to the second bearing ring 32 of the wheel bearing 29.

[0043] Advantageously, the first clutch half 46 is arranged in such a way that it can be axially displaced relative to the third bearing ring 30 designed as the outer bearing shell of the rotor bearing 17, is radially circumferential and at least partially axially overlaps.

[0044] Particularly advantageously, the rotor support 7 has a ring part, wherein the ring part is arranged radially circumferentially around the third bearing ring 30 and axially overlaps with the third bearing ring, and wherein the third bearing ring is directly torsionally rigidly connected to the ring part. Advantageously, the first clutch half 46 is directly slidably supported on the ring part.

[0045] Advantageously, the second clutch half 47 is directly torsionally rigidly connected to the brake disc support 23, which in turn is advantageously directly torsionally rigidly connected to the second bearing ring 32.

[0046] At the shaft 11, a pinion 34 is also arranged, which is connected to the second bevel ring 18 via a first bevel ring 35 with a toothed portion.

[0047] At the wheel carrier 2, a brake caliper 38 with a brake pad 39 is also arranged. The brake caliper 38 can be designed as an internal brake caliper 38.

[0048] The wheel carrier 2, the brake caliper 38, the brake pad 39, the stator 4, the stator support 6, the servo motor 12, the shaft 11, the pinion 34 and the first bearing ring 31 do not rotate with the rim 24.

[0049] The brake disc 22, the brake disc support 23 and the second bearing ring 32 always rotate together with the rim 24.

[0050] The rotor support 7, the rotor 5, the first clutch half 46 and the third bearing ring 30 (outer bearing shell) only rotate with the rim 24 when the disengaging clutch 13 is engaged, i.e., when the first clutch half 46 is torsionally connected to the second clutch half 47.

[0051] The electric machine 3 can be designed as an axial flux machine.

[0052] In order to seal the rotor chamber, in particular the intermediate chamber between the rotor 5 and the stator 4, a first seal 21 can be provided, which is arranged coaxially with the rotor support 7 such that the first intermediate gap between the rotor support 7 and the stator support 6 is filled by the first seal 21.

[0053] A second seal 25 or more radial seals 25 can be arranged coaxially with the rotor support 7 such that the second intermediate gap between the rotor support 7 and the brake disc support 23 is filled by the second seal 25.

[0054] Relative to the main rotational axis A, the second seal 25 can be arranged axially on the side of the first seal 21 facing away from the wheel carrier 2.

[0055] The second seal 25 can be arranged radially inside the stator 4, i.e., in particular radially inside the region of the magnets arranged in the stator 4.

[0056] The first seal 21 can be arranged radially inside the rotor 5, i.e., in particular radially inside the region of the magnets arranged in the rotor 5.

[0057] The first connection point for connecting the brake disc support 23 to the second bearing ring 32 can be arranged radially inside the second seal 25.

[0058] The brake disc 22, which is connected to the brake disc carrier 23 in an anti-torsional manner, can be arranged axially on the side of the first seal 21 opposite the second seal 25 with respect to the main axis of rotation A.

[0059] Furthermore, the third seal 40 can be arranged coaxially with the rotor carrier 7 such that the third intermediate gap between the third bearing bush or the first bearing ring 31 and the inner bearing bush or the second bearing ring 32 is filled by the third seal 40.

[0060] Furthermore, there can be a second connection point for sealingly connecting the first bearing ring 31 to the stator carrier 6. Thus, the rotor chamber is enclosed: The stator carrier 6 has a cylindrical part 9, which is sealed with respect to the first disc-shaped part 41 of the rotor carrier 7 by means of the first seal 21, and the first disc-shaped part is located on the side of the stator 4 in the axial direction. The rotor carrier 7 also has a cylindrical part 42 and a second disc-shaped part 43 connected to the cylindrical part 42, and the second disc-shaped part is sealed with respect to the brake disc carrier 23 by means of the second seal 25. The brake disc carrier 23 has a sealed connection point to the second bearing ring 32 (inner bearing bush). The second bearing ring 32 (inner bearing bush) is sealed with respect to the first bearing ring (middle bearing bush) by means of the third seal 40. The first bearing ring 31 has a sealed second connection point to the stator carrier 6.

[0061] Furthermore, a fourth seal 44 can be provided between the second bearing ring 32 and the first bearing ring 31 on the side of the wheel bearing 29 axially opposite the third seal 40.

[0062] The first bearing ring 31 can be designed as a single-piece integral bearing bush, which is both the bearing ring on the radially outer side of the wheel bearing 29 and the bearing ring on the radially inner side of the rotor bearing 17. Alternatively, the first bearing ring 31 can also be designed as two anti-torsionally interconnected bearing bushes (or bearing rings), one of which is the radially outer part of the wheel bearing 29 and the other is the radially inner part of the rotor bearing 17.

[0063] Figure 2 A schematic detailed view of the electric wheel drive 1 is shown.

[0064] The disconnect clutch 13 has a first clutch half 46 that is connected to the rotor carrier 7 in an anti-torsional manner.

[0065] Advantageously, the first clutch half includes a sliding sleeve.

[0066] Furthermore, the disconnect clutch 13 has a second clutch half 47 that is connected to the second bearing ring 32 in an anti-torsional manner. The second clutch half 47 is thus also connected to the wheel rim 24 in an anti-torsional manner.

[0067] Advantageously, the servo motor 12 for disengaging the clutch 13 is arranged directly at the wheel carrier 2. Advantageously, the cover 49 (as the housing of the servo motor 12) of the servo motor 12 is fixed to the wheel carrier 2 by means of bolts. Advantageously, the servo motor 12 is arranged on the side of the wheel carrier 2 facing away from the first and second clutch halves 46, 47, wherein the servo motor 12 advantageously projects at least partially into a recess in the wheel carrier 2.

[0068] The rotational axis B of the shaft 11 can be arranged parallel to the main rotational axis A.

[0069] The shaft 11 is torsionally connected to the servo motor rotor of the servo motor 12. Advantageously, the wheel carrier 2 has a hole 48, through which the shaft 11 is guided. The hole 48 can be flush with the passage 10.

[0070] Advantageously, the disk-shaped part 8 is arranged on the side of the wheel carrier 2 facing away from the servo motor 12, wherein the disk-shaped part 8 has a passage 10 through which the shaft 11 is guided.

[0071] Advantageously, the axial displacement device 26 is arranged on the side of the wheel carrier 2 facing away from the servo motor 12, which axial displacement device is designed to convert the rotational movement of the shaft 11 into an axial movement parallel to the main rotational axis A.

[0072] The axial displacement device 26 has a pinion 34, which is torsionally connected to the shaft 11.

[0073] The axial displacement device 26 also has a first bevel ring 35, which is coupled to the pinion 34 via tooth engagement, and a second bevel ring 18, which is torsionally connected to the stator support 6 via a slot 19 in the stator support 6.

[0074] Advantageously, the first bevel ring 35 and the second bevel ring 18 are arranged radially inside the cylindrical part 9 and axially overlapping therewith. Particularly advantageously, the entire axial displacement device 26 is arranged radially inside the cylindrical part 9 and axially overlapping therewith.

[0075] The second bevel ring 18 has a shift fork 50, which engages in a slot in the first clutch half 46.

[0076] Advantageously, the first clutch half passes through one or more passages 37 in the rotor support 7, so that the first clutch half 46 is also torsionally connected to the rotor support 7, and thus the first clutch half 46 can rotate together with the rotor support 7, while the second bevel ring 18 does not rotate, wherein the first clutch half can however move axially together with the second bevel ring 18.

[0077] The torsion of the shaft 11 causes the torsion of the first bevel ring 35 via the pinion 34 and the toothing, thereby causing the axial movement of the second bevel ring 18 and the first clutch half 46. The first clutch half engages or disengages from the second clutch half 47 accordingly according to the rotation direction of the shaft 11, thereby coupling the rotor carrier 7 to the brake disc carrier 23 or separating the rotor carrier 7 from the brake disc carrier 23.

[0078] In addition, the covering part 49 is arranged above the servo motor 12.

[0079] The first clutch half 46 is annular in the engagement area of the shift fork 50 and is arranged coaxially with the main rotation axis A. Advantageously, the first clutch half has a claw-shaped toothing which can engage with the corresponding claw-shaped toothing of the second clutch half 47 on the side of the rotor carrier 7 facing away from the shift fork.

[0080] Advantageously, the first bearing ring 31 also forms the bearing ring on the radially inner side of the rotor bearing 17, wherein the bearing ring on the radially outer side of the rotor bearing 17 (i.e., the third bearing ring 30) is torsionally rigidly connected to the rotor carrier 7.

[0081] In addition, a return spring 51 acting parallel to the main rotation axis A can be provided, and the return spring is arranged such that it is supported on the second bevel ring 18 on the one hand and on the rotor carrier 7 on the other hand.

[0082] The components of the disengaging clutch 13 arranged upstream of the first clutch half 46, namely the servo motor 12, the shaft 11, the pinion 34 and the axial displacement device 26 (with the pinion 34, the first bevel ring 35, the second bevel ring 18, and the balls, if appropriate, located between the bevel rings 35, 18) can be collectively referred to as the actuator.

[0083] List of reference signs

[0084] 1 Electric hub drive

[0085] 2 Wheel carrier

[0086] 3 Motor

[0087] 4 Stator

[0088] 5 Rotor

[0089] 6 Stator support

[0090] 7 Rotor carrier

[0091] 8 Disk part

[0092] 9 Cylindrical part

[0093] 10 Passage

[0094] 11 - shaft

[0095] 12 - servo motor

[0096] 13 - disengaging clutch

[0097] 14 - passageway

[0098] 15 - bolt connection

[0099] 16 - channel

[0100] 17 - rotor bearing

[0101] 18 - inclined - plane ring

[0102] 19 - groove

[0103] 20 - pin

[0104] 21 - seal, first seal

[0105] 22 - brake disc

[0106] 23 - brake - disc support

[0107] 24 - rim

[0108] 25 - another radial seal, second seal

[0109] 26 - axial - displacement device

[0110] 27 - wheel bolt

[0111] 28 - combined bearing

[0112] 29 - wheel bearing

[0113] 30 - third bearing ring

[0114] 31 - first bearing ring

[0115] 32 - second bearing ring

[0116] 33 - rolling element

[0117] 34 - pinion

[0118] 35 - inclined - plane ring

[0119] 37 - passageway

[0120] 38 - brake caliper

[0121] 39 - brake pad

[0122] 40 - third seal

[0123] 41 - first disc - shaped part

[0124] 42 Cylindrical part

[0125] 43 Second disc-shaped part

[0126] 44 Fourth seal

[0127] 46 First clutch half

[0128] 47 Second clutch half

[0129] 48 Hole

[0130] 49 Cover part

[0131] 50 Shift fork

[0132] 51 Return spring

[0133] A Main rotation axis

[0134] B Rotation axis.

Claims

1. An electric wheel hub drive device (1) for a motor vehicle, the electric wheel hub drive device having a wheel carrier (2); the electric wheel hub drive device having a wheel bearing (29), the wheel bearing having a first bearing ring (31) connected to the wheel carrier (2) in a torsionally rigid manner and a second bearing ring (32) arranged to be rotatable relative to the main rotational axis (A); the electric wheel hub drive device having an electric motor (3), the electric motor having a stator (4) and a rotor (5) arranged to be rotatable about the main rotational axis (A); the electric wheel hub drive device having a stator support (6) connected to the wheel carrier (2) in a torsionally rigid manner; the electric wheel hub drive device having a rotor support (7) connected to the rotor (5) in a torsionally rigid manner and supported to be rotatable relative to the wheel carrier (2), characterized in that, A disengaging clutch (13), the disengaging clutch having a first clutch half (46) torsionally connected to the rotor support (7) and a second clutch half (47) torsionally connected to the second bearing ring (32), wherein the first clutch half (46) is arranged to be axially displaceable relative to a third bearing ring (30) designed as the outer bearing shell of the rotor bearing (17), and radially surrounds the third bearing ring and at least partially axially overlaps the third bearing ring.

2. The electric wheel hub drive device (1) according to claim 1, characterized in that, An axial displacement device (26), the axial displacement device being designed to axially displace the first clutch half (46), wherein the axial displacement device (26) has a pinion (34), the pinion being arranged axially between the first clutch half (46) and the wheel carrier (2).

3. The electric wheel hub drive device (1) according to claim 2, characterized in that, The pinion (34) is arranged to radially overlap the first clutch half (46).

4. The electric wheel hub drive device (1) according to claim 2 or 3, characterized in that, The axial displacement device has a first bevel ring (35) coupled to the pinion (34) via tooth engagement and a second bevel ring (18) torsionally connected to the stator support (6) via a slot (19) of the stator support (6), wherein the bevel rings (18, 35) are arranged adjacent to each other axially and have respective bevel surfaces, the bevel surfaces engaging each other and being designed such that torsion of the first bevel ring (35) relative to the second bevel ring (18) causes axial displacement of the second bevel ring (18).

5. The electric wheel hub drive device (1) according to any one of claims 2 to 4, characterized in that, A servo motor (12), the servo motor being arranged on a side of the wheel carrier (2) facing away from the first clutch half (46) and the second clutch half (47), wherein a shaft (11) is torsionally connected to the rotor of the servo motor (12) and torsionally connected to the pinion (34).

6. The electric wheel hub drive device (1) according to claim 4 or 5, characterized in that, The second bevel ring (18) has a shift fork (50), the shift fork engaging in a slot of the first clutch half (46).

7. The electric wheel hub drive device (1) according to any one of the preceding claims, characterized in that, A return spring (51) acting parallel to the main rotational axis (A), the return spring being arranged such that it is supported on the one hand on the second bevel ring (18) and on the other hand on the rotor support (7).

8. The electric wheel hub drive device (1) according to any one of claims 5 to 7, characterized in that, The rotational axis (B) of the servo motor (12) is arranged parallel to the main rotational axis (A).

9. The electric wheel hub drive device (1) according to any one of claims 5 to 8, characterized in that, The wheel carrier (2) has a hole (48), wherein the shaft (11) is guided through the hole (48).

10. The electric hub drive device (1) according to any one of claims 5 to 9, characterized in that A covering part (49), the covering part being arranged above the servo motor (12) on a side facing away from the wheel carrier (2).

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