drive unit

Abstract

The invention relates to a drive unit (10) for a human-powered vehicle, in particular a bicycle or an EPAC, having a housing (12), an electric motor (18) with a stator (44) and a rotor (46), a stator support (48) and electronics (50), wherein the stator support (48), the stator (44), the rotor (46) and the electronics (50) are configured as a preassembled unit (56) such that the preassembled unit (56) can be assembled into the housing (12).

Description

TECHNICAL FIELD

[0001] The invention relates to a drive unit for a human-powered vehicle. Furthermore, the invention also relates to an assembly consisting of a cable harness for a human-powered vehicle and a drive unit. BACKGROUND

[0002] DE 10 2015 100 676 A1 discloses a drive assembly with a human-powered drive, an electric auxiliary drive, a harmonic transmission mechanism and a common driven element. The drive unit has a complex structure with a large number of individual components and bearing points.

[0003] EP 2 724 926 A1 discloses a central drive unit with a pedal bearing shaft for a human-powered drive and an auxiliary drive, the auxiliary drive having a motor and a planetary gear transmission mechanism downstream of the motor. This drive unit also has a relatively complex structure with a large number of individual components.

[0004] DE 10 2014 108 611 A1 discloses a bicycle drive device with a drive housing for accommodating a pedal crankshaft, a strain wave transmission mechanism, which is arranged within the drive housing and can be connected in a drive-technical manner to a traction means holder. This bicycle drive device also has a complex structure. Assembly is time-consuming. SUMMARY

[0005] It is the task of the invention to provide a drive unit which is improved in comparison. A reduction in components, functional integration and packaging optimization are particularly desirable.

[0006] The invention solves this task with a drive unit for a human-powered vehicle according to the invention. The drive unit is configured as a drive unit for a human-powered (muscle-powered) vehicle, in particular for a bicycle or an EPAC (Electrically Power Assisted Cycle). The drive unit can relate to a bicycle drive device.

[0007] The drive unit has a housing, an electric motor with a stator and a rotor, a stator support and electronics. The electronics can have or be configured as an electronic printed circuit board. The stator support, the stator, the rotor and the electronics are configured as a preassembled unit (assembly), so that the preassembled unit can be assembled as a whole into the housing of the drive unit, i.e. arranged and fastened in the housing.

[0008] By incorporating the components into an assembly, the handling during assembly is simplified. Thus, when assembling the drive unit, the incorporated components are not assembled individually, but as an assembly into the housing of the drive unit. Thereby, the final assembly of the assembly can be optimized. Furthermore, with the incorporation of the components, an assembly is obtained which is preassembled and which can be functionally tested. By having the stator carrier not only fasten the stator, but also fasten further components in the drive housing, the stator carrier fulfills multiple functions and a higher functional integration and component reduction can be achieved.

[0009] The drive unit can have a foot crank for the human-powered drive, which is rotatably supported in the housing of the drive unit. Furthermore, the drive unit can have an auxiliary drive, which has an electric motor and a harmonic drive mechanism as essential components, wherein the electric motor is mechanically coupled with the harmonic drive mechanism. The human-powered drive and the auxiliary drive can be coupled with a common driven element, for example a sprocket or a sprocket carrier fastened on the driven element.

[0010] The driven element can be configured as a hollow shaft, which radially surrounds the foot crank in sections along the axial direction. Radially between the foot crank bearing shaft and the driven element, freewheel clutches can be arranged, one of which couples the auxiliary drive or the harmonic drive mechanism with the driven element and the other of which couples the foot crank bearing shaft with the driven element. The freewheel clutches can be arranged axially next to each other and / or interact with the inner face of the particularly inner peripheral face of the driven shaft.

[0011] The harmonic drive mechanism can be coupled on the input side with the electric motor and on the output side with the driven element. The harmonic drive mechanism can have a harmonic generator, a deformable cylindrical bushing or inner bushing with an externally toothed portion (flexspline) and a cylindrical outer ring or outer bushing with an internally toothed portion. The harmonic generator can be configured as an elliptical disc, which has a rolling bearing arranged thereon and optionally a deformable rolling ring. The flexspline can be configured as an annular or pot-shaped. The flexspline is usually used as a follower of the harmonic drive mechanism.

[0012] The stator carrier can have a particularly annular or sleeve-shaped carrier section and a particularly disc-shaped fastening section. The two sections can be configured as separate elements and fastened to each other or can be constructed as a common structural element in a one-piece design. At the carrier section, for example, the stator can be fastened and / or the rotor rotatably supported. The stator carrier can be connected with the housing of the drive unit via the fastening section, that is to say fastened at or in the drive unit.

[0013] One or more feed-throughs for electrical signal lines and / or electrical power lines can be advantageously configured at the stator support, in particular at the fastening section. This facilitates simple contacting with short cable lengths, since the cables can be fed through the stator support, for example from the electronics to the electric motor.

[0014] The stator, the stator device and / or the rotor can optionally be fastened at the stator support, wherein the rotor can be supported at the stator support by means of rolling bearings. The stator support is the central element of the structural unit, which accommodates at least the stator with the coils, the rolling bearings of the rotor and the electronics. The electronics, for example an electronic printed circuit board, can be arranged at one side of the stator support or of the fastening section of the stator support, for example at the outer side, while the electric motor is arranged at the other side, for example at the inner side. The electronics are thus arranged separately from the electrical auxiliary drive.

[0015] The stator support can advantageously have a radially outwardly protruding fastening section by means of which the stator support can be fitted and fixed in the housing of the drive unit, in particular by means of a press fit. A compact and stable fastening is achieved for this purpose, for example without separate fastening elements. The outer geometry, for example the outer circumference, of the stator support can correspond to the inner geometry, for example the inner circumference, of the housing. By means of the press fit an oil-tight connection can be established between the fastening section and the housing, for example by using a sealing compound. The drive components can thus be lubricated on one side of the fastening section without impeding the electronics on the other side of the fastening section.

[0016] The electric motor can be suitably configured as an external rotor motor, that is to say the rotor of the electric motor can be configured as an external rotor. The rotor radially surrounds the stator outwardly. By this construction an advantageous power density and a relatively compact construction size can be achieved.

[0017] The rotor can advantageously have a sleeve-shaped coupling section on the driven side for coupling with a harmonic drive arranged in the housing, wherein the coupling section can have an elliptical outer contour. The coupling section is thus the interface to the harmonic drive on the driven side. The harmonic generator is integrated directly into the rotor of the electric motor as the coupling section. The coupling section is provided for accommodating the rolling bearings (flexible bearings) of the harmonic generator.

[0018] The stator of the electric motor can be potted in a suitable manner together with the stator support. The potting compound can extend at least section-wise past the radially outwardly projecting fastening section and / or the sleeve-shaped bearing section of the stator support. The coil winding of the stator can be fixed by the potting compound and a firm connection between the stator and the stator support is established. Furthermore, a thermal engagement with the housing can be achieved via the stator support. A sealing of the electrical signal lines and power lines or their feedthroughs can also be achieved by the potting compound. The potting compound can be, for example, thermally conductive and / or electrically insulating.

[0019] The rotor can advantageously be supported in the first bearing point at the stator support by means of only one rolling bearing. For this purpose, a structurally advantageous support is created with a small number of components and a small space requirement. Once the magnetic field of the electric motor is loaded via the stator winding, this magnetic field can exhibit the second bearing point as a dynamic magnetic bearing. A support of the rotor is thus created by means of the rolling bearing (first bearing point) and the magnetic bearing (second bearing point).

[0020] An electrical flexure conductor can be provided in a suitable manner, which has two layers and is constructed as a two-layer flexure conductor and is connected at one end to an electronics, for example an electronic printed circuit board, and has at the other end an electrical interface with a plurality of contact surfaces for coupling a vehicle-side plug-in connector. A particularly compact electrical line guidance is thus created. One layer of the flexure conductor can be constructed as a layer for the transmission of electrical power for the transmission of electrical power, while the second layer is constructed as a layer for the transmission of electrical signals for the transmission of electrical signals.

[0021] A slot can advantageously be configured at the outside of the housing, in which the flexure conductor and the electrical interface are arranged. With the design as a flexure conductor, only a small slot depth is possible for the line guidance without influencing the internal geometry of the housing of the drive unit. The feedthrough of sections of the flexure conductor, for example contact strips for coupling the flexure conductor to the electronics, can be achieved from radially outside to radially inside through slits configured in the housing.

[0022] The layers of the flexure conductor can optionally be covered by a potting compound or a cover, wherein through-openings are configured in the potting compound or the cover at the electrical interface. In this way, a mechanical fixing and sealing of the flexure conductor in the housing is achieved. The potting compound or the cover can radially outwardly close off the slot configured at the outside of the housing, preferably flush.

[0023] The electrical contact surfaces can advantageously be configured as flat contacts for the transmission of electrical power and electrical signals. The flat contacts do not protrude or only slightly protrude from the flexure conductor or the layers of the flexure conductor. The assembly of the drive unit into the vehicle is thus facilitated, since there is no risk of plug-in connector elements protruding during assembly being cut off.

[0024] The electronics can have in a suitable manner a position sensor device for detecting the rotational position of the crankshaft of the drive unit, wherein the position sensor device has one or more proximity sensors fixed relative to the housing and an eccentric element, in particular an eccentric ring, which is fastened against relative rotation at the crankshaft and cooperates with the one or more proximity sensors. The rotational position of the crankshaft is thus detected radially. The one or more proximity sensors have a detection region in which the eccentric element is located. The one or more proximity sensors can be arranged at the electronics or on an electronic printed circuit board and / or can each be configured as a Hall sensor, an infrared sensor or a sensor operating inductively or the like. By means of the proximity sensors, the rotational position of the crankshaft can be determined based on the distance, since the arrangement of the eccentric element with respect to the crankshaft is known. By means of the position sensor device, an angular change, an angular velocity and / or a first derivative of the angular velocity can be determined.

[0025] The task set out at the beginning is also solved by the assembly according to the application, which consists of a cable harness and a drive unit for a human-powered vehicle.

[0026] The assembly comprises a cable harness and a drive unit for a human-powered vehicle, in particular a bicycle or an EPAC. The cable harness can have a coupling plug for coupling to an electrical interface of a curved conductor, wherein the coupling plug has elastic contact pins for contacting the curved conductor. A retaining clip can be provided, by means of which the coupling plug can be fixed at the drive unit, wherein the retaining clip encloses the coupling plug and is latched into a recess (at one or both ends), which is configured at the outside, in particular the peripheral surface, of the housing of the drive unit. The cable harness can form part of the cable harness of the vehicle.

[0027] With regard to the advantages that can be achieved in this way, reference is made to the explanations relating thereto with regard to the drive unit. The measures described in connection with the drive unit can be used for further designing the assembly. BRIEF DESCRIPTION OF DRAWINGS

[0028] The application is explained below with the aid of the drawings, in which identical or functionally identical elements are provided with the same reference symbols. In the drawings:

[0029] Figure 1 An embodiment of a drive unit according to the application is shown in a schematic sectional view;

[0030] Figure 2 A stator support and a housing of a drive unit are shown Figure 1

[0031] Figure 3a , b in a side view Figure 3a ) and in a perspective view Figure 3b )​Figure 1 The rotor of the electric motor in the drive unit;

[0032] Figure 4 Show Figure 1 The drive unit has a stator support;

[0033] Figure 5 Showing a stator and rotor Figure 1 The stator support of the drive unit;

[0034] Figure 6a , 6b In a stereoscopic view ( Figure 6a ) and in the sectional view ( Figure 6b ) shows Figure 1 The housing of the drive unit, which has a bent conductor and a plug for the cable harness on the vehicle side;

[0035] Figure 7 Shown in the stereoscopic view viewed from below Figure 6a B's bent conductor and plug;

[0036] Figure 8a b in the decomposition diagram Figure 8a ) and in the assembled state ( Figure 8b ) shows Figure 6a b and Figure 7 The bent conductor; and

[0037] Figure 9a b in the sectional view ( Figure 9a ) and side view ( Figure 9b ) shows Figure 1 The positioning sensing device of the drive unit. Detailed Implementation

[0038] Figure 1 A drive unit for a human-powered vehicle, such as a bicycle, is shown, wherein the drive unit is generally labeled with reference numeral 10.

[0039] The drive unit 10 has a housing 12, on which or within the housing are arranged the components of the drive unit 10. The drive unit 10 is designed for manual operation, i.e., a drive driven by muscle force, and has a pedal crankshaft 14 rotatably supported within the housing 12 of the drive unit 10. Furthermore, the drive unit 10 also has an electric auxiliary drive 16, which has an electric motor 18 and a harmonic drive mechanism 20, wherein the electric motor 18 and the harmonic drive mechanism 20 are mechanically coupled. The pedal crankshaft 14 and the auxiliary drive 16 are coupled to a common driven element 22, on which a sprocket support or sprocket (not shown) can be securely mounted.

[0040] The pedal crankshaft 14 is supported at the housing cover 26 by means of the first rolling bearing 24, with the housing cover facing to one side (in Figure 1 The drive unit 10 is enclosed by a housing 12 (from center to left). Furthermore, the pedal crankshaft 14 is rotatably supported at the driven element 22 by means of a second rolling bearing 28. The driven element 22 is rotatably supported within the housing 12 by means of a third rolling bearing 30 and a fourth rolling bearing 32.

[0041] The harmonic drive mechanism 20 includes a harmonic generator 34, a deformable cylindrical bushing or inner bushing 36 with external teeth (flexible gear), and a cylindrical outer ring 38 with internal teeth. The harmonic drive mechanism 20 is coupled to the electric motor 18 on the input side and to the driven element 22 on the output side, more specifically, via a first freewheel clutch 40. The pedal crankshaft 14 is coupled to the driven element 22 via a further second freewheel clutch 42.

[0042] The electric motor 18 has a stator 44 with stator coils 45 and a rotor 46. The drive unit 10 also has a stator support 48 and an electronics unit 50, the electronics unit being configured as an electronic printed circuit board. The stator support 48 ( Figure 1 , Figure 2 , Figure 4 and Figure 5 It has, for example, a sleeve-shaped support section 52 and a, for example, a disc-shaped fastening section 54. In the example, the support section 52 and the fastening section 54 are constructed as a single unit.

[0043] The stator support 48, stator 44, rotor 46, and electronic components 50 are configured into a pre-assembled unit 56. Figure 2 and Figure 5 Thus, the pre-assembled unit 56 can be assembled as a whole into the housing 12 of the drive unit 10.

[0044] In the bearing section 52 ( Figure 5 The stator 44 is fastened at the fastening section 54 and the rotor 46 is rotatably supported at the bearing section 52 by means of rolling bearings 58. The stator support 48 can be connected to the housing 12 of the drive unit 10 via the fastening section 54.

[0045] In stator support 48 ( Figure 2 At the location, particularly at the fastening section 54, there are through-holes for the electrical signal line 60 and the electrical power line 62. The stator 44, electronic components 50, and rotor 46 are fastened to the rotor support 48, wherein the rotor 46 is supported on the stator support 48 by means of rolling bearings 58. The electronic components or printed circuit boards 50 are arranged on one side of the stator support 48 or the fastening section 54, while the electric motor 18 is arranged on the other side.

[0046] As already explained, the stator support 48 has a radially outwardly projecting fastening section 54, by means of which the stator support 48 can be fitted into the housing 12 of the drive unit 10, for example by press fitting. The external geometry 49 of the stator support 48 or the fastening section 54 corresponds to the internal geometry 13 of the housing 12. Figure 2 An oil seal connection can be established between the fastening section 54 and the housing 12 by press fitting, for example, by using a sealant (not shown).

[0047] Electric motor 18 ( Figure 1 , Figure 5 The rotor 46 of the electric motor 18 is configured as an external mover and radially surrounds the stator 44.

[0048] Rotor 46 ( Figure 1 , Figure 2 , Figure 3a , Figure 3b The driven side has a sleeve-shaped coupling section 64 for coupling with the harmonic drive mechanism 20 arranged in the housing 12, wherein the coupling section 64 has an elliptical outer contour 65. The coupling section 64 is thus the interface with the harmonic drive mechanism 20 on the driven side. The coupling section 64 is configured to accommodate a rolling bearing 66, which serves as a flexible bearing for the harmonic generator 20.

[0049] stator 44 of electric motor 18 Figure 4 In the example, the stator support 48 is secured by a potting compound 68. The potting compound 68 extends in segments through the fastening section 54 and the bearing section 52 of the stator support 48. The potting compound 68 mechanically secures the coil windings 45 of the stator 44. Furthermore, the potting compound 68 seals the signal lines and power lines or their leads 60, 62.

[0050] Rotor 46 ( Figure 5 It is supported at the stator support 48 by only a rolling bearing 58, which serves as the first bearing section. Once the magnetic field of the electric motor 18 is loaded via the stator coil, the magnetic field forms the second bearing section 70 as a "dynamic magnetic bearing".

[0051] In addition, a bent conductor 72 is provided. Figure 6a b Figure 7 , Figure 8a , Figure 8bThe bent conductor is constructed as a two-layered bent conductor with two layers 74 and 76. One end is connected to an electronic device 50 or an electronic printed circuit board, and the other end has an electrical interface 78 with multiple flat contact surfaces 79 for connecting a plug 204 on the vehicle side. The first layer 74 of the bent conductor 72 is configured to transmit electrical power, and the second layer 76 is configured to transmit electrical signals.

[0052] At 80 degrees on the outside of the housing 12 ( Figure 6a b) A groove 82 is constructed in which a bent conductor 72 and an electrical interface 78 are arranged. Sections of the bent conductor 72, for example, for threading through a contact strip 84 for connecting the bent conductor 72 to the electronic device 50, can be achieved through a slot 86 constructed in the housing 12 (from the radial outside to the radial inside).

[0053] Layers 74 and 76 of the bent conductor 72 Figure 7 , Figure 8a , Figure 8b The cavity can be sealed by a filling material or a cover 88, wherein a through opening 89 is constructed at the electrical interface 78 (in the filling material or cover 88). The filling material or cover 88 can preferably be closed radially outward flush with the groove 82.

[0054] The contact surface 79 is configured as a flat contact 79 and does not extend from the bent conductor 72 or the layers 74, 76 of the bent conductor 72, or only slightly extends out. Figure 8a b).

[0055] Figure 6a , Figure 6b , Figure 7 , Figure 8a and Figure 8b Component 200 is shown, which includes a cable harness 202 (shown only partially) and a drive unit 10 for a human-powered vehicle. The cable harness 202 has a coupling plug 204 at one end for attachment to an electrical interface 78 of a bent conductor 72. The coupling plug 204 has a resilient contact pin 206 for electrical contact with a corresponding contact surface 79 of the bent conductor 72.

[0056] In addition, a retaining clip 208 is provided. Figure 6a The retaining clip 208 secures the connector plug 204 to the drive unit 10. The retaining clip 208 is configured to surround the connector plug 204 and is inserted into a recess 91 at one or both ends, the recess being located on the outer side 80 of the housing 12 of the drive unit 10. This secures the connector plug 204 to the housing 12.

[0057] Electronic devices ( Figure 9ab) A positioning sensing device 90 for detecting the rotational position of the pedal crankshaft 14 of the drive unit 10, wherein the positioning sensing device 90 has: a plurality of proximity sensors 92, for example four proximity sensors 92, distributed on the periphery; and an eccentric element, for example an eccentric ring 94, which is fixed to the pedal crankshaft 14 against relative rotation and works in cooperation with the proximity sensors 92.

[0058] The proximity sensor 92 is disposed at the electronic device 50 or on the printed circuit board. The proximity sensor 92 can be configured as a Hall sensor, an infrared sensor, or a sensor that operates by induction.

[0059] List of reference numerals

[0060] 10 drive units

[0061] 12. Shell

[0062] 13 Internal Geometry

[0063] 14. Foot pedal crankshaft

[0064] 16 Electric auxiliary drive

[0065] 18 Electric motors

[0066] 20 Harmonic Drive Mechanism

[0067] 22 Driven element

[0068] 24 First rolling bearing

[0069] 26. Housing cover

[0070] 28 Second rolling bearing

[0071] 30 Third rolling bearing

[0072] 32 Fourth rolling bearing

[0073] 34 Harmonic Generator

[0074] 36. Internal bushings, flexible wheels

[0075] 38 Outer ring

[0076] 40 First Freewheel Clutch

[0077] 42 Second Freewheel Clutch

[0078] 44 Stator

[0079] 45 coil

[0080] 46 rotors

[0081] 48 Stator Support

[0082] 49 External Geometry

[0083] 50 Electronic components and printed circuit boards

[0084] 52 Bearing Section

[0085] 54 Fastening Section

[0086] 56 Pre-assembled units

[0087] 58 First bearing section, rolling bearing

[0088] 60 For signal line lead-in section

[0089] 62 For power line lead-in section

[0090] 64 Coupling Section

[0091] 65. Elliptical outer contour

[0092] 66 Rolling bearings (flexible bearings)

[0093] 68 Grouting Material

[0094] 70 Second bearing section, magnetic bearing

[0095] 72 Bending conductor

[0096] 74 First Floor

[0097] 76 Second Floor

[0098] 78 Electrical Interface

[0099] 79 Contact Surface

[0100] 80 Outer side

[0101] 82 slots

[0102] 84 Contact Strip

[0103] 86 gaps

[0104] 88. Grouting material and covering

[0105] 89 Through opening

[0106] 90 Position sensing device

[0107] 91. Empty Section

[0108] 92 Proximity Sensor

[0109] 94 Eccentric elements, eccentric rings

[0110] 200 components

[0111] 202 Cable Harness

[0112] 204 Plug

[0113] 206 Contact pin

[0114] 208 retaining clip

Claims

1. A drive unit (10) for a human-powered vehicle, the drive unit comprising: a housing (12), an electric motor (18) having a stator (44) and a rotor (46), a stator support (48), and electronic components (50), characterized in that, The stator support (48), the stator (44), the rotor (46) and the electronic device (50) are configured as a pre-assembled unit (56) that can be assembled into the housing (12), wherein the rotor (46) is supported at the stator support (48) by means of only one rolling bearing (58).

2. The driving unit (10) according to claim 1, characterized in that, One or more through-holes (60, 62) for electrical signal lines and electrical power lines are constructed at the stator support (48), and the stator (44), the electronic device (50) and the rotor (46) are fastened at the stator support (48), wherein the rotor (46) is supported at the stator support (48) by means of a rolling bearing (58).

3. The driving unit (10) according to claim 1 or 2, characterized in that, The stator support (48) has a radially outwardly protruding fastening section (54) by means of which the stator support (48) can be assembled or fastened in the housing (12) of the drive unit (10).

4. The driving unit (10) according to claim 1 or 2, characterized in that, The electric motor (18) is configured as an external motor.

5. The driving unit (10) according to claim 1 or 2, characterized in that, The rotor (46) has a sleeve-shaped coupling section (64) for coupling with a harmonic drive mechanism (20) arranged in the housing (12), wherein the coupling section (64) has an elliptical outer contour (65).

6. The driving unit (10) according to claim 1 or 2, characterized in that, The stator (44) and stator support (48) of the electric motor (18) are filled with water.

7. The driving unit (10) according to claim 1 or 2, characterized in that, A bent conductor (72) is provided, which has two layers (74, 76) and one end is connected to the electronic device (50) and the other end has an electrical interface (78) with multiple contact surfaces (79) for connecting to a plug (204) on the vehicle side.

8. The driving unit (10) according to claim 7, characterized in that, A groove (82) is formed on the outer side (80) of the housing (12), the curved conductor (72) and the electrical interface (78) are arranged in the groove, and the layers (74, 76) of the curved conductor (72) are covered by a filling material or a cover (88), wherein a through opening (89) is formed at the electrical interface (78).

9. The driving unit (10) according to claim 1 or 2, characterized in that, The electronic device (50) has a positioning sensing device (90) for detecting the rotational position of the pedal crankshaft (14) of the drive unit (10), wherein the positioning sensing device (90) has one or more proximity sensors (92) and an eccentric element (94) that is fixed to the pedal crankshaft (14) against relative rotation and works in cooperation with the proximity sensors (92).

10. The driving unit (10) according to claim 1 or 2, characterized in that, The vehicle in question is a bicycle or an EPAC.

11. The driving unit (10) according to claim 1 or 2, characterized in that, The stator support (48) has a radially outwardly protruding fastening section (54), by means of which the stator support (48) can be press-fitted or fastened in the housing (12) of the drive unit (10).

12. The driving unit (10) according to claim 9, characterized in that, The eccentric element is an eccentric ring.

13. A component (200) comprising a cable harness (202) for a human-powered vehicle and a drive unit (10) according to claim 7, 8 or 9, characterized in that, The cable harness (202) has a connector plug (204) for connection to an electrical interface (78) of a bent conductor (72), wherein the connector plug (204) has a resilient contact pin (206) for contacting the contact surface (79) and / or the connector plug (204) is secured to the drive unit (10) by means of a retaining clip (208), wherein the retaining clip (208) surrounds the connector plug (204) and can be locked into a recess (91) constructed on the outside (80) of the housing (12) of the drive unit (10).

14. The component according to claim 13, characterized in that, The vehicle in question is a bicycle or an EPAC.

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