DE102019126962B3 - Electromotive drive unit for a vehicle that can be driven by muscle power and a vehicle that can be driven by muscle power - Google Patents

Abstract

The invention relates to an electromotive drive unit (1) for a vehicle that can be driven by muscle power, comprising a stator (2), a rotor (3), a drive pulley (4) that can be driven via the rotor (3) and has a connection (5) to an endless traction mechanism (6), and a freewheel device (7) for realizing a freewheel such that the drive pulley (4) can be rotated at a lower speed than the rotor (3) with the same direction of rotation. The freewheel device (7) comprises a first coupling disk (8) and comprises a second coupling disk (9), the two coupling disks (8; 9) being arranged axially adjacent and each of the two coupling disks (8; 9) on the axial end face, which faces the other coupling disk (9; 8), has first form-locking means (10) for forming the freewheel and wherein the two coupling disks (8; 9) can be arranged axially displaceably relative to one another on an axis (11) shared with the stator (2). Furthermore, the first coupling disc (8) is coupled to the rotor (3) via second form-locking means (12) and the second coupling disc (9) is coupled to the drive disc (4) via third form-locking means (13), and is an actuator (14) present, via which the first coupling disc (8) and the second coupling disc (9) can be axially displaced against each other, in such a way that a power transmission via the first form-fitting means (10) of the coupling discs (8; 9) is canceled in both directions of rotation.

Description

The present invention relates to an electromotive drive unit for a vehicle that can be driven by muscle power, in particular an electromotive drive unit for a multi-lane vehicle, comprising a stator, a rotor, a drive pulley which can be driven via the rotor and is connected to an endless traction device and a freewheel device for realizing a freewheel. such that the drive disk can be rotated at a lower speed than the rotor with the same direction of rotation. The invention also relates to a vehicle that can be operated with muscle power.

On bicycles, the pedal crank that the driver uses to drive is usually connected to the rear wheel by means of a freewheel. This means that the driver can freely decide whether he would like to drive the bicycle with the cadence coupled to the speed of the bicycle through the transmission ratio of the drive train, or whether he would like to turn the crank more slowly, which is particularly advantageous when driving downhill at high speeds .

If you push the bicycle backwards, the crank rotates at least with the frequency coupled to the speed of the bicycle through the transmission ratio of the drive train.

The EP 1 121 255 B1 describes a hub for bicycles with a hub axle and a hub housing arranged concentrically therewith, which includes a bearing device with at least two bearings arranged between the hub axle and the hub housing. A rotor for receiving at least one gear wheel is arranged on the hub axle and a freewheel device is arranged between the rotor and the hub housing, which has two toothed disks, the tooth surfaces of which are pressed against one another by a pretensioning device. The toothed disks are arranged essentially concentrically to the hub axis in planes which are oriented perpendicular to the hub axis. The toothed disks are held or stored in a floating manner, so that the toothed disks can be tilted in relation to the hub axis, the toothed disks being pressed against one another with a pretensioning device and designed in such a way that they generate a torque of the rotor in the direction of travel from the rotor to the hub housing transfer.

In the EP 2 436 945 B1 describes a drive hub for crank-driven vehicles with two wheels, the drive hub having a stationary hub axle and a hub sleeve rotatably mounted relative to the hub axle, and having a freewheel in a torque path in the drive hub between a driver and the hub sleeve. Furthermore, a control device is provided for switching off the freewheel, the freewheel being automatically switched off in the event of a backward rotary movement on the hub shell, so that no torque can be transmitted in the torque path with the freewheel.

From the DE 100 02 334 C1 an overrunning clutch with a double-acting freewheel that can be switched in both directions of rotation is previously known.

Furthermore, from the CH 181943 A a disengageable roller locking mechanism for driving freewheel hubs of bicycles is known.

Out DE 10 2017 103 734 A1 is known a bicycle hub assembly comprising a hub axle, a hub shell, a pinion bearing body and a clutch. The pinion bearing body is rotatably mounted on the hub axle to rotate about an axis of rotation. The pinion bearing body can be rotated about the axis of rotation relative to the hub axle shaft and the hub housing. The clutch has a first coupling state in which a pedal actuation torque is transmitted from the pinion bearing body to the hub housing during the pedal actuation in a first direction of rotation, a first release state in which the hub housing is rotatable relative to the pinion bearing body in the first direction of rotation during idling, and a second coupling state in which an idling torque is transmitted from the hub shell to the pinion bearing body during idling in the first direction of rotation.

Out DE 10 2018 116 465 A1 A bicycle component is known for an at least partially muscle-powered bicycle with at least one freewheel unit, which comprises a freewheel component and a support unit and a spring unit, the freewheel component having a hollow tubular body section extending around a central axis and having a non-circular outer contour for the rotationally fixed and axial having displaceable coupling and an end face with axial engagement elements. The spring unit pushes the freewheel component and the support unit apart in an axial direction of the central axis. The freewheel component, the support unit and the spring unit form a preassembled assembly and the spring unit is attached to the freewheel component and to the support unit.

On single-lane bicycles, turning the crank handle to the side when the bicycle is moving backwards does not usually represent a high safety risk. However, with two- or three-lane bicycles, such as cargo bikes or velomobiles, this poses a safety risk for the user, as these vehicles also roll backwards , or if these have an electric reverse gear, can also drive backwards. In this driving situation, the user must follow the movement of the pedal crank specified by the vehicle. This is uncomfortable and carries the risk that the user can slip off the pedals. Now it can happen that he is caught by the rotating crank and possibly trapped between other vehicle parts and the crank. In combination with the high vehicle mass of cargo bikes or velomobiles, this results in a considerable risk of injury.

There is a continuing need to further reduce the risk of accidents in vehicles that can be driven by muscle power.

The invention is based on the object of providing an electromotive drive unit for a vehicle that can be driven by muscle power, in particular an electromotive drive unit for a multi-lane vehicle, as well as a vehicle that can be driven by muscle power, whereby a vehicle operated with this drive unit further improves and improves its operational safety is optimized in particular with a view to possible accident risks in such a way that accident risks are further minimized.

This object is achieved by an electromotive drive unit for a vehicle that can be driven by muscle power with the features of claim 1 and a vehicle that can be driven by muscle power with the features of claim 14. Preferred further developments of the invention are the subject of the dependent claims.

An electromotive drive unit according to the invention for a vehicle that can be driven by muscle power, in particular an electromotive drive unit for a multi-lane vehicle that can be driven by muscle power, comprises a stator, a rotor, a drive pulley that can be driven via the rotor and is connected to an endless traction device and a freewheel device for realizing a freewheel. such that the drive disk can be rotated at a lower speed than the rotor with the same direction of rotation. The freewheel device comprises a first coupling disk and a second coupling disk, the two coupling disks being arranged axially adjacent and wherein each of the two coupling disks has first form-locking means on the axial end face opposite the other coupling disk to form the freewheel and wherein the two coupling disks face one another an axis common to the stator can be arranged axially displaceably. The first coupling disc is coupled to the rotor via second form-locking means and the second coupling disc is coupled to the drive disc via third form-locking means. Furthermore, there is an actuator by means of which the first coupling disk and the second coupling disk can be axially displaced relative to one another, in such a way that force transmission via the first form-locking means of the two coupling disks in both directions of rotation is canceled.

By providing a switchable freewheel according to the invention, whereby the crank is decoupled from the rest of the drive train, it can be ensured that a user of a bicycle, in particular a heavier vehicle that can be operated with muscle power, such as a cargo bike or a multi-lane velomobile, does not want to or unintentionally drive backwards is injured by the pedal crank that would otherwise rotate.

In the context of the invention, an electromotive drive unit is understood to mean a drive unit with an electrical machine which can be operated both as a drive, that is to say as a motor, as well as generating electricity, that is, as a generator. In the following, for the sake of simplicity, the term electromotive drive unit is used - which, however, can be operated both as a motor and as a generator within the meaning of the invention.

According to an advantageous embodiment of the invention, it can be provided that the first form-locking means have an axial helical toothing formed on the first coupling disk and a helical toothing corresponding thereto on the second coupling disk. In this way, on the one hand, an effective coupling of a drive shaft, for example a pedal crank, and also an efficient decoupling in the form of a freewheel in a first direction of rotation can be achieved with simple means.

According to a further preferred embodiment of the invention, it can also be provided that the first coupling disk has second form-locking means, which are designed as teeth on the circumferential surface of the first coupling disk, and which are in engagement with a correspondingly designed toothing of the rotor, and / or that the second coupling disk has third form-locking means, which are designed as teeth on the peripheral surface of the second coupling disk, and which are in engagement with a correspondingly designed toothing of the drive disk. This enables an optimized transmission of force and torque and furthermore an optimized use of installation space in the axial direction is achieved.

Furthermore, according to a likewise advantageous embodiment of the invention, it can be provided that the actuator acts as an electromagnet is trained. The electromagnet is preferably designed in the form of a lifting magnet, which again ensures optimized use of the available installation space.

According to a further particularly preferred embodiment of the invention, it can be provided that the actuator designed as a lifting or pulling magnet has a coil, the coil being fixedly arranged opposite an armature, and that the armature of the electromagnet is connected by a sleeve portion connected to the second coupling disc is formed. Such an arrangement, in which a sleeve, in particular one-piece connected to the second coupling disk, dips into the coil area of the electromagnet in some areas and thus amplifies the magnetic force acting on the second coupling disk, a switchable drive for coupling and decoupling the two coupling disks is achieved in a space-saving manner and thus a space-saving freewheel is provided which, in at least one switching position, ensures complete decoupling of a pedal crank or freewheel in both directions of rotation.

In a first further developed embodiment of the electromagnet, it can be provided that, when the coil is de-energized, the second coupling disk is brought into engagement with and / or held in engagement with the first coupling disk under spring force. This enables a so-called “fail-safe” operating state in which the two coupling disks are in engagement with one another when the electromagnet is de-energized and ensure a coupled state.

In a second further developed embodiment of the electromagnet, it can alternatively also be provided that the actuator, which is designed as a lifting or pulling magnet, has a coil, the coil being arranged stationary opposite the armature, and that the armature of the electromagnet is supported by a sleeve section acting on the second coupling disk is formed, wherein in the de-energized state of the coil, the second coupling disc is separated from the first coupling disc by spring force. This enables a so-called “fail-safe” operating state, in which the two coupling disks are not in engagement with one another when the electromagnet is de-energized, ie they are separated from one another and thus ensure a decoupled state.

It can also be advantageous to further develop the invention in such a way that the drive unit has a position sensor for detecting an axial position of the second coupling disk, as a result of which the switching state can be monitored decoupled or coupled. If necessary, the switching times can also be determined via a control unit and, on the basis of a change in the switching times, it can be recognized at an early stage whether deviations occur, for example due to wear or material defects or the like, so that necessary maintenance or repair can be indicated at an early stage.

According to another preferred embodiment of the subject matter of the invention, provision can be made for the drive pulley to be designed to be essentially hollow on the inside or to be designed as a hollow part and to be provided as a housing for receiving the actuator and the second coupling disk. The hollow drive pulley can be closed on its end facing away from the rotor with the aid of a cover element. This structure achieves, on the one hand, a further optimization of the installation space and, on the other hand, enables a type of modular structure by providing a motor module of the drive unit arranged in a motor housing and an output module of the drive unit housed in the drive pulley. This modular structure has immense advantages in production as well as in the context of subsequent maintenance or repair.

Finally, the invention can also be implemented in an advantageous manner such that the cover element has a receptacle for the arrangement of the coil, which also supports the goal of optimizing the use of installation space.

The drive disk is advantageously supported on its axial side facing the rotor via a first radial roller bearing opposite the rotor and the drive disk is supported on its axial side facing away from the rotor via a second radial roller bearing opposite the cover element. The advantage of this embodiment is that the cover part can be designed to be stationary in the structure of the electromotive drive unit, thereby enabling a power supply to the electromagnet coil arranged on the inside of the cover part.

According to a further preferred further development of the invention, provision can also be made for a control unit to be provided for controlling the electromagnet, the control unit being formed either by a manually operable switching element, such as a limit switch / switch or the like, and / or by a computing unit that processes sensor signals . It can thereby be achieved that the separation of the drive train through the switched decoupling of the two coupling disks either through a manual switching command from a user (for example through the actuation of a button) and / or can be initiated automatically as a function of operating states of the vehicle detected by further sensors (for example the detection of a backward movement of the vehicle).

Furthermore, the object on which the invention is based is achieved by a vehicle, in particular a multi-lane vehicle, which can be driven by muscle power and has an electric drive unit as described above.

According to a further particularly preferred embodiment of the vehicle according to the invention, it can be provided that the electromotive drive unit has a second drive pulley, via which the drive unit can be coupled, for example via a further endless traction means, to an electromotive vehicle axle.

The electromotive drive unit, depending on the version, separates the two toothed pulleys from one another in the energized or de-energized state. The system can be expanded with a switch that reports the current operating status of the system to the vehicle's central control unit. In combination with a control unit and an electric parking brake, it can then be ensured that the freewheel is decoupled before the vehicle starts moving backwards.

The invention is explained in more detail below with reference to figures without restricting the general inventive concept.

• 1 die erfindungsgemäße elektromotorische Antriebseinheit in einer Perspektivansicht,
• 2 die Antriebseinheit gemäß 1 in einem Axialschnitt,
• 3 eine zweite, im Aufbau etwas veränderte Ausführung der erfindungsgemäßen elektromotorischen Antriebseinheit in einem Teil-Axialschnitt,
• 4 die Antriebsscheibe der erfindungsgemäßen Antriebseinheit in einer Perspektivansicht,
• 5 die Antriebsscheibe gemäß 4 in einem Axialschnitt, und
• 6 den Antriebsstrang eines erfindungsgemäßen Fahrzeugs in einer möglichen Ausführungsform in perspektivischer Darstellung.

Show it:

• 1 the electromotive drive unit according to the invention in a perspective view,
• 2 the drive unit according to 1 in an axial section,
• 3 a second, slightly modified version of the electromotive drive unit according to the invention in a partial axial section,
• 4th the drive pulley of the drive unit according to the invention in a perspective view,
• 5 the drive pulley according to 4th in an axial section, and
• 6th the drive train of a vehicle according to the invention in a possible embodiment in a perspective view.

1 shows an electromotive drive unit 1 for a vehicle that can be driven by muscle power 23 in a perspective view, the vehicle 23 or a possible embodiment of a drive train for such a vehicle 23 in 6th is illustrated. The electromotive drive unit 1 comprises an electrical machine arranged in a housing and a drive pulley coupled to the electrical machine 4th with one in the 1 unspecified connection 5 to an endless traction device 6th . Here is the connection 5 the drive pulley 4th as a circumferential toothing of the drive pulley 4th formed, by means of an endless traction means designed as a toothed belt 6th a driving force or a torque can be transmitted. In 6th is a possible integration of the drive unit 1 is shown in a vehicle that can be operated with muscle power and one can easily see that with the drive pulley 4th engaged endless traction means 6th .

In 2 is the drive unit 1 according to 1 shown in an axial section. The electromotive drive unit 1 for a vehicle that can be driven by muscle power 23 includes a stator 2 , a rotor 3 , one over the rotor 3 drivable drive pulley 4th with a connection 5 to an endless traction device 6th as well as a freewheel device 7th to implement a freewheel, such that the drive pulley 4th with the same direction of rotation as the rotor 3 is rotatable at a slower speed than the rotor 3 . The freewheel device 7th comprises a first coupling disc 8th and a second coupling disc 9 , the two coupling disks 8th ; 9 are arranged axially adjacent and wherein each of the two coupling disks 8th ; 9 on that of the other coupling disc 9 ; 8th facing axial end face first form-fitting means 10 has to form the freewheel. The two coupling discs 8th ; 9 are against each other on one with the stator 2 common axis 11 axially displaceable, floating, arranged. The first coupling disc 8th is via second form-fitting means 12 with the rotor 3 coupled and the second coupling disc 9 is via third form fit means 13 with the drive pulley 4th coupled. The design and function of the interlocking means is in particular based on 5 will be explained in more detail. There is also an actuator 14th provided over which the first coupling disc 8th and the second coupling disc 9 can be axially shifted against each other in such a way that a power transmission via the first positive locking means 10 the coupling discs 8th ; 9 is canceled in both directions of rotation.

3 shows a second, in comparison to the embodiment according to FIG 2 The design of the electromotive drive unit according to the invention has been modified somewhat in its structure 1 in a partial axial section. Identical or identically acting components are provided with the same reference symbols. Incidentally, at this point we refer to the explanations 2 referenced. About the representation according to 2 going beyond it is shown here that the Power supply lines through the cover element 18th are passed through to the outside.

In 4th is the drive pulley 4th the drive unit according to the invention 1 shown in a perspective view. It is easy to see here that the drive wheel 4th In addition to the components accommodated in its interior, it can be built up as a separate module and thus also preassembled accordingly. The drive wheel, which is hollow on the inside and accommodates other components 4th is on its the rotor 3 remote side over the cover part 18th closed, with connection lines for the coil 15th of the actuator 14th through an opening in the cover element 18th are led to the outside.

As in particular in 5 Well shown is the drive pulley 4th as a housing to accommodate the actuator 14th as well as for receiving the second coupling disc 9 educated. This is what the drive pulley is for 4th hollow on the inside and points to the rotor 3 remote end face a removable cover element 18th on. In addition, it can be clearly seen that the coupling interface between the first coupling disc 8th and second coupling disc 9 by the first positive locking means 10 is formed by one on the first coupling disc 8th formed axial helical teeth and one on the second coupling disc 9 corresponding helical gearing is realized. The first coupling disc 8th also has second form-locking means 12 on, as a toothing on the peripheral surface of the first coupling disc 8th are formed and with a correspondingly formed internal toothing of the rotor 3 are engaged. Furthermore, the second coupling disc 9 third form-fit means 13 on, as a toothing on the circumferential surface of the second coupling disc 9 are formed and with a correspondingly formed internal toothing of the drive pulley 4th are engaged.

By the way, is the 2 , 3 and 5 the structure of the actuator designed as a lifting magnet 14th clearly visible. The actuator 14th has a coil 15th on, with the coil 15th fixed opposite an anchor 16 is arranged on a cylindrical bobbin. The anchor 16 of the solenoid is through one with the second coupling disc 9 connected sleeve section 17th formed, the sleeve portion 17th in some areas in the coil 15th supporting cylindrical coil carrier immersed. A spiral spring is arranged between the coil carrier and the sleeve section, which the two coupling disks with its spring force 8th ; 9 squeezes. A detection means in the form of a limit switch or the like can additionally be arranged within the coil carrier. When the coil is de-energized 15th becomes the second coupling disc 9 spring-loaded with the first coupling disc 8th brought into engagement and / or held, whereby a corresponding "fail-safe" operating position is guaranteed. It can also be clearly seen that in the cover element 18th a recording 19th to arrange the coil 15th is trained. The drive pulley 4th is on her the rotor 3 facing axial side via a first radial roller bearing 20th opposite the rotor 3 supported and is on her the rotor 3 facing away axial side via a second radial roller bearing 21st opposite the cover element 18th stored.

For decoupling the freewheel device 7th becomes the coil 15th of the electromagnet energized. The magnetic field generated thereby acts on the ferromagnetic sleeve section 7th whereby this in addition to the first coupling disc 8th is shifted in the axial direction until the axial form fit with the second coupling disc 9 is completely canceled and so no torque from the drive pulley 4th on the rotor 3 (and vice versa) is transferable. If the energization of the electromagnet is interrupted and that on the sleeve section 7th The applied magnetic field collapses, then the second coupling disc 9 Spring force in the coupled state via an axial displacement up to the form fit with the first coupling disc 8th offset.

6th shows the drive train of a vehicle according to the invention that can be operated with muscle power 23 in a possible embodiment in a perspective view. The drive train includes an electromotive drive unit 1 as described above using the 1-5 is described, a pedal crank unit, which has a first traction means 6th with the drive unit 1 is connected, an electric motor driven vehicle axle 25th , which are connected to a second drive pulley via a second endless traction mechanism 24 the electric motor drive unit 1 is connected and a control unit 22nd for controlling the electromagnet, the control unit 22nd either by a manually operated switching element 26th (shown schematically in 2 ) and / or is formed by a sensor signal processing computing unit. The control unit 22nd can also be set up to control the further drive motors arranged in the rear wheels of the drive train. In addition, the vehicle has 23 a battery, not shown, for supplying the electric drive unit 1 and other electrical consumers in the drive train.

The invention is not limited to the embodiments shown in the figures. The above description is therefore not to be regarded as restrictive but rather as explanatory. The following claims are to be understood in such a way that a named feature is present in at least one embodiment of the invention. This does not exclude the presence of further features. If the claims and the above description define “first” and “second” features, this designation serves to distinguish between two similar features without defining a priority.

List of reference symbols

1

Drive unit

2

stator

3

rotor

4th

Drive pulley

5

Connection

6th

Endless traction means

7th

Freewheel device

8th

first coupling disc

9

second coupling disc

10

first positive locking means

11

axis

12

second form-fit means

13

third form-fit means

14th

Actuator

15th

Kitchen sink

16

anchor

17th

Sleeve section

18th

Cover element

19th

admission

20th

first radial roller bearing

21st

second radial roller bearing

22nd

Control unit

23

vehicle

24

second drive pulley

25th

Vehicle axle

26th

Switching element

Claims (15)

Electromotive drive unit (1) for a vehicle that can be driven by muscle power, comprising - a stator (2), - a rotor (3), - a drive pulley (4) which can be driven via the rotor (3) and has a connection (5) to an endless traction device (6) ), - as well as a freewheel device (7) for realizing a freewheel, such that the drive pulley (4) can be rotated at a lower speed than the rotor (3) with the same direction of rotation, characterized in that - the freewheel device (7) has a first Coupling disk (8) and a second coupling disk (9), - wherein the two coupling disks (8; 9) are arranged axially adjacent and wherein each of the two coupling disks (8; 9) on the axial end face that of the other coupling disk (9; 8), has first form-locking means (10) for forming the freewheel, - and wherein the two coupling disks (8; 9) can be axially displaced relative to one another on an axis (11) common to the stator (2) a can be northed, - and wherein the first coupling disc (8) is coupled to the rotor (3) via second form-locking means (12) and the second coupling disc (9) is coupled to the drive disc (4) via third form-locking means (13), - and wherein an actuator (14) is present, via which the first coupling disc (8) and the second coupling disc (9) can be axially displaced relative to one another, in such a way that a power transmission via the first form-locking means (10) of the coupling discs (8; 9) is canceled in both directions of rotation. Electromotive drive unit (1) according to Claim 1 , characterized in that the first form-locking means (10) have an axial helical toothing formed on the first coupling disc (8) and a helical toothing corresponding thereto on the second coupling disc (9). Electromotive drive unit (1) according to one of the preceding claims, characterized in that the first coupling disc (8) has second form-fitting means (12) which are designed as teeth on the circumferential surface of the first coupling disc (8) with correspondingly formed teeth of the rotor (3) is in engagement, and / or that the second coupling disk (9) has third form-locking means (13), which are designed as teeth on the peripheral surface of the second coupling disk (9), which are formed with a correspondingly designed toothing of the drive disk (4) is engaged. Electromotor drive unit (1) according to one of the preceding claims, characterized in that the actuator (14) is designed as an electromagnet, in particular as a lifting or pulling magnet. Electromotive drive unit (1) according to Claim 4 , characterized in that the actuator (14) designed as a lifting or pulling magnet has a coil (15), the coil (15) is arranged stationary opposite an armature (16), and that the armature (16) of the electromagnet is formed by a sleeve section (17) connected to the second coupling disc (9). Electromotive drive unit (1) according to Claim 5 , characterized in that when the coil (15) is de-energized, the second coupling disc (9) is brought into engagement with and / or held in engagement with the first coupling disc (8) under spring force. Electromotive drive unit (1) according to Claim 4 , characterized in that the actuator (14) designed as a lifting or pulling magnet has a coil (15), the coil (15) being arranged fixedly opposite the armature (16), and that the armature (16) of the electromagnet by a on the second coupling disc (9) acting sleeve section (17) is formed, wherein in the de-energized state of the coil (15) the second coupling disc (9) is separated from the first coupling disc (8) by spring force. Electromotive drive unit (1) according to one of the Claims 4 to 7th , characterized by a control unit (22) for controlling the electromagnet, the control unit (22) being formed either by a manually operable switching element (26) and / or by a processing unit that processes sensor signals. Electromotive drive unit (1) according to one of the preceding claims, characterized in that the drive unit (1) has a position sensor for detecting an axial position of the second coupling disc (9). Electromotive drive unit (1) according to one of the preceding claims, characterized in that the drive disk (4) is designed as a housing for receiving the actuator (14) and the second coupling disk (9) and on its end face facing away from the rotor (3) by a Lid element (18) can be closed. Electromotive drive unit (1) according to Claim 10 , characterized in that the cover element (18) has a receptacle (19) for the arrangement of the coil (15). Electromotive drive unit (1) according to one of the preceding claims, characterized in that the drive pulley (4) is supported on its axial side facing the rotor (3) via a first radial roller bearing (20) opposite the rotor (3). Electromotive drive unit (1) according to one of the preceding claims, characterized in that the drive pulley (4) is mounted on its axial side facing away from the rotor (3) via a second radial roller bearing (21) opposite the cover element (18). Vehicle (23) that can be driven by muscle power, comprising an electromotive drive unit (1) according to one of the preceding claims. Vehicle (23) after Claim 14 , characterized in that the electromotive drive unit (1) has a second drive pulley (24), via which the drive unit (1) can be coupled to a vehicle axle (25) driven by an electric motor.

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