drive unit

Abstract

The invention relates to a drive unit (10) for a manually driven vehicle, in particular a bicycle or an EPAC, comprising a housing (12), a pedal crankshaft (14), an electric auxiliary drive (16) and an output shaft (22) configured as a hollow shaft, wherein the pedal crankshaft (14) and the output shaft (22) are arranged coaxially with respect to each other, and the output shaft (22) surrounds the pedal crankshaft (14) radially on the outside in an axial section, wherein a first overrunning clutch (24) and a second overrunning clutch (26) are arranged radially between the pedal crankshaft (14) and the output shaft (22), are axially adjacent to each other and act on the output shaft (22).

Description

Technical Field

[0001] The invention relates to a drive unit for a manually driven vehicle, wherein the manually driven vehicle is in particular a human-powered vehicle. Background Art

[0002] DE 10 2015 100 676 A1 discloses a drive assembly having a manual drive, an electric auxiliary drive, and a shared output element. This drive unit has a complex structure with a large number of individual components and bearing points.

[0003] EP 2724926 A1 discloses a central drive unit having a central shaft for a manual drive and an auxiliary drive with a downstream planetary transmission. 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 having a drive housing for accommodating a pedal crankshaft and a stress-wave transmission, which is arranged within the drive housing and can be connected to a traction means carrier in terms of drive technology. This bicycle drive also has a complex structure. Summary of the Invention

[0005] The object of the present invention is to provide a drive unit that is improved compared to the aforementioned drive units. In particular, an optimized packaging and a compact design are desirable.

[0006] The present invention solves this problem by a drive unit as described below. The drive unit is set up for a manually driven vehicle, in particular a bicycle or an EPAC (electrically assisted bicycle). The drive unit comprises a housing, a pedal crankshaft, an electric auxiliary drive and an output shaft configured as a substantially pot-shaped hollow shaft. The pedal crankshaft and the output shaft are arranged coaxially with each other, and the output shaft axially segments and radially surrounds the pedal crankshaft on the outside. A first overrunning clutch and a second overrunning clutch are arranged radially between the pedal crankshaft and the output shaft, which are axially adjacent to each other and act on the output shaft.

[0007] The coaxial arrangement of the components allows for good utilization of the available installation space, which contributes to a compact design. Thus, the components of the drive unit, such as the electronics unit or electronics circuit board, the electric motor, the transmission unit, the output shaft, and / or the overrunning clutch, can be arranged centrally around the pedal crankshaft.

[0008] The overrunning clutch acts on the output shaft and is therefore mechanically coupled to the output shaft on the output side, i.e., via an output element, such as an outer ring, of the overrunning clutch. The overrunning clutch can be coupled to the inner circumference of the output shaft. The inner circumference can be axially continuous, in particular having a constant diameter. Independently of this, a sprocket or sprocket carrier can be fastened to the output shaft for coupling to a drive chain.

[0009] For example, by pressing in an overrunning clutch, the clutch's output member, such as its outer ring, can be connected to the inner circumference of the output shaft in a rotationally fixed manner. The overrunning clutch can include an inner ring, an outer ring, and a control element located therebetween, which enables torque transmission between the inner and outer rings in only one direction of rotation. The control element can be, for example, a clamping roller, a clamping body, or a pawl.

[0010] The electric auxiliary drive can have an electric motor and a transmission unit mechanically coupled thereto, such as a harmonic drive. A high transmission ratio can be achieved using a harmonic drive in a compact design. The harmonic drive can have a wave generator, a deformable cylindrical sleeve (flexspline) with an external meshing portion, and a cylindrical outer sleeve with an internal meshing portion. The wave generator can be constructed as an elliptical disk with rolling bearings and an optional deformable raceway arranged thereon. The flexspline can be constructed in an annular or pot-shaped manner. The flexspline is typically used as the output element of the harmonic drive.

[0011] The electric motor can be designed as an external rotor motor, meaning its rotor can be designed as an outer rotor. The rotor surrounds the stator radially on the outside. This allows for a favorable power density and compact dimensions.

[0012] A stator carrier can be provided, comprising a carrier section, in particular a sleeve-shaped carrier section, and a fastening section, in particular a disk-shaped fastening section. The stator can be fastened to the stator carrier, in particular to the carrier section, and / or the rotor can be supported on the stator carrier, in particular to the carrier section, via rolling bearings. Independently of this, electronic components, such as an electronic circuit board, can be fastened to the stator carrier, in particular to the fastening section. The stator carrier can be fastened to the interior of the housing of the drive unit via the fastening section.

[0013] The first overrunning clutch advantageously couples the pedal crankshaft to the output shaft. This allows the output shaft to be manually driven, for example by manipulating the pedal crankshaft with muscle force. A force-flow coupling exists when torque can be transferred from one component (e.g., the pedal crankshaft) to another (e.g., the output shaft).

[0014] The second overrunning clutch can advantageously couple the force flow between the electric auxiliary drive and the output shaft. Thus, an electric drive of the output shaft or an electric auxiliary drive is possible. A force flow coupling exists when torque can be transferred from one component (e.g., the auxiliary drive) to another (e.g., the output shaft).

[0015] Advantageously, the electric auxiliary drive can include a harmonic drive with a flexspline, wherein the flexspline is coupled to the second overrunning clutch via a preferably annular adapter. The adapter can radially bridge the gap between the flexspline and the second overrunning clutch. This allows the output shaft to be designed more simply in terms of design and manufacturing technology. The adapter can optionally be hardened, which increases the stability of the adapter. As previously described, the electric auxiliary drive can include an electric motor coupled to the harmonic drive. The torque of the electric motor can thus be transmitted to the output shaft via the harmonic drive and the adapter.

[0016] In an appropriate manner, the flexspline can have a preferably sleeve-shaped coupling section as the output member of the harmonic drive, through which the flexspline and the annular adapter are connected to each other in the connection area, wherein a fitting portion and / or bonding portion is constructed in the connection area. This contributes to the precise and stable connection of the flexspline and the adapter. Therefore, the fitting portion between the flexspline and the annular adapter can be constructed in a part of the connection area (fitting area). The bonding portion can be constructed in another part of the connection area (bonding area). The fitting area and the bonding area can be separated from each other by, for example, radial shoulders constructed on the adapter and / or the coupling section. Therefore, the functional surfaces of the fitting area and the bonding area are separated from each other.

[0017] Advantageously, the pedal crankshaft can comprise a first shaft part and a separate second shaft part or be formed from these shaft parts, wherein the shaft parts can be connected to one another, in particular can be reversibly connected to one another axially. Thus, the pedal crankshaft can be axially separable, for example. Installation is facilitated because the structural component can also be easily installed in the cylindrical housing of the drive unit. In the connection area, one shaft part can have an axially protruding coupling, which surrounds the other shaft part radially on the outside in the connected state, i.e. the shaft parts overlap one another in the connection area, and one shaft part can have an insertion section and the other shaft part can have a corresponding receiving section.

[0018] The two shaft parts can be fastened to one another in an advantageous manner by means of a screw connection, which is preferably arranged centrally. This allows for a structurally simple and stable fastening. The screw connection can be implemented using only one screw. The central longitudinal axis of the screw can be oriented axially, i.e. parallel to or, in particular, coaxially with the central longitudinal axis of the pedal crankshaft. The screw can be inserted through a through hole in one shaft part, for example, the second shaft part, and screwed into a hole provided with an internal thread in the other shaft part, for example, the first shaft part.

[0019] Advantageously, the pedal crankshaft can be rotatably supported at one end via a first bearing on a housing cover that delimits the housing at the end, and / or the pedal crankshaft can be supported at the other end via a second bearing on the output shaft, thereby providing a reliable and structurally advantageous support for the pedal crankshaft.

[0020] The pedal crankshaft can advantageously have a radially outwardly projecting shaft shoulder, via which the pedal crankshaft is coupled to the first overrunning clutch. A sensor system for detecting torque can be provided, which detects the torque applied to the pedal crankshaft at the shaft shoulder, for example, at the end face. This represents a structurally advantageous and simultaneously space-saving design, since, independently of the measurement method used, the conventional torque measurement using a sleeve can be dispensed with.

[0021] The sensor system for detecting the torque can be applied to the pedal crankshaft, for example, on the end side of the shaft boss, and fastened thereto. The sensor system can thus be applied to the measuring location and rotate with the shaft. The energy supply can be provided by the electronics unit (for example, an electronics circuit board) via sliding contacts or inductively. The signal of the sensor system can be transmitted to the electronics unit, for example, an electronics circuit board, via radio or sliding contacts.

[0022] The sensor system for detecting torque can advantageously include one or more strain gauges, for example, mounted on the end face of the shaft collar. This allows for reliable torque detection. The torque, i.e., the torque applied to the pedal crankshaft, can be determined based on the detected deformation of the shaft collar relative to the pedal crankshaft.

[0023] Alternatively or additionally, the sensor system can advantageously include one or more magnetostrictive measuring elements for detecting torque, which are, for example, mounted on the end face of the shaft collar. This also allows for torque determination. Torque determination, i.e., the torque applied to the pedal crankshaft, can be achieved based on the detected shear stress of the shaft collar.

[0024] A sleeve can be provided in a suitable manner, which is put onto or pressed onto the pedal crankshaft, wherein the sleeve has a receiving section for one or more rolling bearings of the flexspline, wherein the one or more rolling bearings can be axially fixed in the receiving section. Thus, the axial positioning of the support of the flexspline can be achieved in a structurally simple manner. The one or more rolling bearings are rolling bearings of the flexspline arranged on the output side, which are arranged, for example, on the coupling section of the flexspline. For example, an axially extending opening for guiding an electrical line through can be constructed on the receiving section. Thus, the electronic components of the drive unit can be connected to the sensor system, i.e., the electronic components belonging to the sensor system, in a simple manner.

[0025] Advantageously, the sleeve forms a sealing surface for the sealing point between the pedal crankshaft and the stator carrier, through which the pedal crankshaft is guided. This allows for reliable separation on the stator carrier. Thus, electronic components, such as an electronic circuit board, located on one side of the stator carrier can be separated from mechanical components, which may be lubricated, located on the other side of the stator carrier. This reduces the risk of damage to the electronics.

[0026] In an appropriate manner, the sleeve and the pedal crankshaft can be sealed by a sealing element, such as an O-ring, arranged radially between the pedal crankshaft and the sleeve. This can suppress the capillary effect radially between the pedal crankshaft and the sleeve. This further reduces the risk of damage to the electronic components.

[0027] Advantageously, line guides, such as channels, can be formed on or in the sleeve, in which electrical lines can be arranged for power and / or signal transmission between, for example, a sensor system for torque measurement, arranged on a shaft shoulder, and an electronics unit, such as an electronics circuit board arranged on a stator carrier. This allows electrical energy and / or signals to be transmitted through the sleeve in a particularly space-saving manner.

[0028] One or more slip rings for transmitting electrical power and / or signals between the electronics unit and the sensor system for torque measurement can be advantageously attached to the sleeve. Preferably, the electronics, for example, an electronics circuit board, can have one or more sliding contacts that interact with each of the slip rings. This allows for space-saving and easy-to-install power and / or signal transmission. For example, the sensor system's signal can be modulated via radio frequency to one of the slip rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is explained in detail below with reference to the accompanying drawings, wherein identical or functionally identical elements are provided with identical reference numerals.

[0030] Figure 1 An embodiment of a drive unit is shown in cross-section;

[0031] Figure 2 An enlarged partial view shows Figure 1 The output shaft and overrunning clutch of the drive unit;

[0032] Figure 3 An enlarged partial view shows Figure 1 The flexible wheel of the harmonic drive device of the drive unit;

[0033] Figure 4 Shown in cross-section Figure 1 A pedal crank shaft of a drive unit;

[0034] Figure 5 Shown in perspective Figure 1 The pedal crankshaft of the drive unit; and

[0035] Figure 6a 、b is a front view ( Figure 6a ) and sectional views ( Figure 6b ) shows Figure 1 The pedal crank shaft, sleeve and stator carrier of the drive unit. DETAILED DESCRIPTION

[0036] Figure 1 A drive unit for a manually driven vehicle such as a bicycle or an EPAC is shown, wherein the drive unit is designated as a whole by the reference numeral 10 .

[0037] The drive unit 10 has a housing 12 on which or in which the components of the drive unit 10 are arranged. For manual drive by muscle power, the drive unit 10 has a pedal crankshaft 14, which is rotatably mounted in the housing 12 of the drive unit 10. Furthermore, the drive unit 10 has an electric auxiliary drive 16, which has an electric motor 18 and a harmonic transmission 20. Furthermore, the drive unit 10 has a substantially pot-shaped output shaft 22, which is designed as a hollow shaft.

[0038] The pedal crankshaft 14 and the output shaft 22 are arranged coaxially with each other, and the output shaft 22 surrounds the pedal crankshaft 14 in an axial segmented manner and radially on the outside. A first overrunning clutch 24 and a second overrunning clutch 26 are arranged radially between the pedal crankshaft 14 and the output shaft 22, and the first overrunning clutch and the second overrunning clutch are axially adjacent to each other and act on the output shaft 22.

[0039] Overrunning clutch 24, 26 ( Figure 2) mechanically acts on the output shaft 22, so that respectively on the output side, that is, through the output member of the overrunning clutch 24, 26, for example, the outer ring is connected to the output shaft 22. As in the example, the overrunning clutch 24, 26 can be connected to the inner peripheral surface 28 of the output shaft 22. The inner peripheral surface 28 can be constructed axially continuously, in particular, it is constructed with a constant diameter. The sprocket or sprocket carrier for coupling with the drive chain can be fastened on the output shaft 22 (not shown). For example, by pressing in the respective overrunning clutch, the output member of the overrunning clutch 24, 26, for example, the outer ring can be connected to the inner peripheral surface 28 of the output shaft 22 in a rotationally fixed manner.

[0040] The auxiliary drive 16 comprises an electric motor 18 and a coupled harmonic drive 20 ( Figure 1 The harmonic drive 20 comprises a wave generator 30 , a deformable cylindrical inner shell 32 (flexspline) with external teeth, and a cylindrical outer shell 34 with internal teeth.

[0041] The electric motor 18 has a stator 36 with a stator winding 37 and a rotor 38. In this example, the electric motor 18 is designed as an outer rotor electric motor, ie the rotor 38 of the electric motor 18 is designed as an outer rotor and surrounds the stator 36 radially on the outside.

[0042] A stator carrier 40 ( Figure 1 、 Figure 6b ), which has a particularly sleeve-shaped support section 42 and a disk-shaped fastening section 44. As in the example, the stator 36 can be fastened to the stator carrier 40, particularly to the support section 42, and / or the rotor 38 can be supported on the stator carrier 40, particularly to the support section 42, via rolling bearings 46. Independently of this, an electronics unit 48, such as an electronics circuit board, can be fastened to the stator carrier 40, particularly to the fastening section 44. The stator carrier 40 can be fastened in the housing 12 via the fastening section 44.

[0043] The first overrunning clutch 24 couples the pedal crankshaft 14 to the output shaft 22. As a result, torque can be transmitted from the pedal crankshaft 14 to the output shaft 22 in one rotational direction. The second overrunning clutch 26 couples the electric auxiliary drive 16 to the output shaft 22. As a result, torque can be transmitted from the auxiliary drive 16 to the output shaft 22 in one rotational direction.

[0044] As already explained, the electric auxiliary drive 16 has a harmonic drive 20 with a flexspline 32, wherein the flexspline 32 is coupled to the second overrunning clutch 26 via a preferably annular adapter 50. The adapter 50 can optionally be hardened.

[0045] The flexspline 32 has a preferably sleeve-shaped coupling section 52, via which the flexspline 32 and the adapter 50 are connected to one another in a connecting region 54 ( Figure 2 and Figure 3 ), wherein the mating portion 56 and / or the adhesive portion 58 are formed in the connection region. In a portion 60 of the connection region 54, the mating portion 56 (mating region 60) is formed between the flexspline 32 and the adapter 50. The adhesive portion 58 (adhesive region 62) is formed in another portion 62 of the connection region 54. As in the example, the mating region 60 and the adhesive region 62 can be separated from each other by radial shoulders 64 formed on the adapter 50 and the coupling section 52, respectively.

[0046] The pedal crankshaft 14 has a first shaft portion 66 and a separate second shaft portion 68 ( Figure 4 ) and is formed by these shaft parts 66, 68, wherein the shaft parts 66, 68 can be reversibly connected to each other. The pedal crankshaft 14 is thus axially separable. In the connection area, the second shaft part 68 has an axially protruding collar 70, which surrounds the first shaft part 66 radially on the outside in the connected state. Therefore, the shaft parts 66, 68 overlap each other in the connection area in the connected state.

[0047] The two shaft parts 66, 68 can be fastened to one another by means of a preferably centrally arranged screw connection 72. The screw connection 72 can be realized by means of only one screw 74. The central longitudinal axis of the screw 74 is oriented axially, i.e. parallel to or in particular coaxially with the central longitudinal axis of the pedal crank axle 14. The screw 74 can be inserted through a through hole in the second shaft part 68 and screwed into a bore 76 of the first shaft part 66 which is provided with an internal thread.

[0048] The pedal crankshaft 14 is connected to the pedal crankshaft 14 at one end by a first bearing 78 ( Figure 1 ) is rotatably supported on a housing cover 80 that delimits the housing 12 at the end. Furthermore, the pedal crankshaft 14 is rotatably supported on the output shaft 22 at the other end via a second bearing 82. The output shaft 22 is in turn rotatably supported on the output shaft 22 via a third bearing 84 and a fourth bearing 86.

[0049] The pedal crank shaft 14 has a shaft boss 88 protruding radially outward ( Figure 1 and Figure 2 ), the pedal crankshaft 14 is connected to the first overrunning clutch 24 through the shaft boss. A sensor system 92 ( Figure 2 and Figure 6b ), which detects the torque applied to the pedal crankshaft 14 on the shaft collar 88, in particular on the end side, ie on the end side 90 of the shaft collar 88.

[0050] The sensor system 92 for detecting the torque can be applied to the pedal crankshaft 14 at the end side 90 of the shaft collar 88 and fastened thereto. The sensor system 92 can thus be applied at the measuring point, i.e., at the end side 90 of the shaft collar 88, and rotates together with the pedal crankshaft 14.

[0051] The sensor system 92 for detecting the torque can have one or more strain gauges (not shown), which are attached, for example, at the end face of the shaft collar 88. The torque can be determined from the detected deformation of the shaft collar 88 relative to the pedal crankshaft 14.

[0052] Alternatively or additionally, sensor system 92 for detecting torque can have one or more magnetostrictive measuring elements 94 fastened to the end, ie, to end face 90 of shaft shoulder 88. The torque can be determined from the detected shear stress of shaft shoulder 88.

[0053] The drive unit 10 has a sleeve 96 which is slipped onto or pressed onto the pedal crankshaft 14 ( Figure 3 and Figure 6b ), wherein the sleeve 96 has a receiving section 98 for one or more rolling bearings 100, 102 of the flexspline 32, wherein the one or more rolling bearings 100, 102 can be axially fixed in the receiving section 98. The rolling bearings 100, 102 support the flexspline 32 on the coupling section 52. An axially extending opening 87 for guiding an electrical line 89 is formed in the receiving section 98. The line 89 connects the electronics 48 of the drive unit 10 to the electronics (not shown) belonging to the sensor system 92.

[0054] The sleeve 96 forms a sealing surface 104 for a sealing point between the pedal crankshaft 14 and the stator carrier 40 , through which the pedal crankshaft 14 is guided.

[0055] The sleeve 96 and the pedal crankshaft 14 are sealed by a sealing element 106 , such as an O-ring, which is arranged radially between the pedal crankshaft 14 and the sleeve 96 .

[0056] Advantageously, a line guide, for example a channel (not shown), can be formed on or in the sleeve 96 , in which the electrical line 89 for power and / or signal transmission between the sensor system 92 for torque measurement and the electronics unit 48 can be arranged.

[0057] One or more slip rings 108, 110 ( Figure 6a, b) is applied to the sleeve 96. The electronics unit 48, for example an electronics circuit board, has one or more electrical sliding contacts 112, 114 which interact with a slip ring 108, 110, respectively.

[0058] Reference Signs List

[0059] 10 drive units

[0060] 12 Housing

[0061] 14 Pedal crank axle

[0062] 16 Auxiliary drive, electric auxiliary drive

[0063] 18 Electric Motor

[0064] 20 Harmonic Drive

[0065] 22 Output shaft

[0066] 24 First overrunning clutch

[0067] 26 Second overrunning clutch

[0068] 28 inner circumference

[0069] 30 Wave Generator

[0070] 32 Deformable inner sleeve, flexible wheel

[0071] 34 coat

[0072] 36 stator

[0073] 37 stator winding

[0074] 38 rotors

[0075] 40 stator carrier

[0076] 42 load-bearing sections

[0077] 44 Fastening section

[0078] 46 Rolling bearings

[0079] 48 Electronic device units, electronic device circuit boards

[0080] 50 adapter

[0081] 52 connection section

[0082] 54 connection area

[0083] 56 Coordination

[0084] 58 bonding part

[0085] 60 Coordination Area

[0086] 62 bonding area

[0087] 64 Radial shoulder

[0088] 66 First axis part

[0089] 68 Second axis part

[0090] 70 protruding coupling

[0091] 72 screw joint

[0092] 74 screws

[0093] 76 holes

[0094] 78 First Bearing

[0095] 80 housing cover

[0096] 82 Second bearing

[0097] 84 Third bearing

[0098] 86 Fourth bearing

[0099] 87 Opening

[0100] 88 Shaft shoulder

[0101] 89 electric lines

[0102] 90 end side

[0103] 92 sensor systems

[0104] 94 Magnetostrictive measuring element

[0105] 96 sleeve

[0106] 98 Accommodation Section

[0107] 100 rolling bearings

[0108] 102 Rolling bearings

[0109] 104 sealing surface

[0110] 106 Sealing element

[0111] 108 slip ring

[0112] 110 slip ring

[0113] 112 sliding contacts

[0114] 114 sliding contacts

Claims

1. A drive unit (10) for a manually driven vehicle, comprising a housing (12), a pedal crankshaft (14), an electric auxiliary drive (16) and an output shaft (22) designed as a hollow shaft, wherein: The pedal crankshaft (14) and the output shaft (22) are coaxially arranged with each other, and the output shaft (22) surrounds the pedal crankshaft (14) radially on the outside in an axial section, characterized in that a first overrunning clutch (24) and a second overrunning clutch (26) are radially arranged between the pedal crankshaft (14) and the output shaft (22), the first overrunning clutch and the second overrunning clutch being axially adjacent to each other and acting on the output shaft (22), wherein the electric auxiliary drive (16) has a harmonic transmission device (20) with a flexible wheel (32), wherein the flexible wheel (32) is connected to the second overrunning clutch (26) via an adapter (50), wherein the flexible wheel (32) has a connecting section (52), and the flexible wheel (32) and the adapter (50) are connected to each other in a connecting area (54) via the connecting section, wherein a fitting portion (56) and / or an adhesive portion (58) is constructed in the connecting area (54).

2. The drive unit (10) according to claim 1, characterized in that The first overrunning clutch (24) couples the pedal crankshaft (14) with the output shaft (22), and the second overrunning clutch (26) couples the electric auxiliary drive (16) with the output shaft (22).

3. The drive unit (10) according to claim 1 or 2, characterized in that The pedal crankshaft (14) has a first shaft portion (66) and a separate second shaft portion (68), the first shaft portion and the second shaft portion being connectable to each other.

4. The drive unit (10) according to claim 3, characterized in that The two shaft parts (66, 68) are fastened or can be fastened to one another by means of a screw connection (72).

5. The drive unit (10) according to claim 1 or 2, characterized in that The pedal crankshaft (14) is rotatably supported on a housing cover (80) that delimits the housing (12) via a first bearing (78), and the pedal crankshaft (14) is supported on the output shaft (22) via a second bearing (82).

6. The drive unit (10) according to claim 1 or 2, characterized in that: The pedal crankshaft (14) has a shaft boss (88) protruding radially outward, and the pedal crankshaft (14) is connected to the first overrunning clutch (24) via the shaft boss, wherein a sensor system (92) for detecting torque is provided, and the sensor system detects the torque applied to the pedal crankshaft (14) on the shaft boss (88).

7. The drive unit (10) according to claim 6, characterized in that The sensor system (92) for detecting torque has one or more strain gauges or one or more magnetostrictive measuring elements (94).

8. The drive unit (10) according to claim 1, characterized in that A sleeve (96) is provided, which is put onto or pressed onto the pedal crankshaft (14), wherein the sleeve (96) has a receiving section (98) for one or more rolling bearings (100, 102) of the flexspline (32), and the one or more rolling bearings (100, 102) can be axially fixed in the receiving section.

9. The drive unit (10) according to claim 8, characterized in that A sealing surface (104) for a sealing point between the pedal crankshaft (14) and a stator carrier (40) through which the pedal crankshaft (14) is guided is formed by means of the sleeve (96).

10. The drive unit (10) according to claim 8 or 9, characterized in that A line guide is formed on or in the sleeve (96), in which an electrical line (89) for power transmission and / or signal transmission between a sensor system for torque measurement and an electronic device unit (48) can be arranged, and / or one or more slip rings (108, 110) for power transmission and / or signal transmission between the electronic device unit (48) and the sensor system for torque measurement are applied to the sleeve (96).

11. The drive unit (10) according to claim 1 or 2, characterized in that The manually driven vehicle is a bicycle or an EPAC.

12. The drive unit (10) according to claim 1, characterized in that The adapter (50) is annular.

13. The drive unit (10) according to claim 4, characterized in that The threaded connection portion (72) is centrally arranged.

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