Drive unit for a vehicle that can be run by human power and vehicle

Abstract

The invention relates to a drive unit for a human-powered vehicle, having an input element (4), a stationary component (9), an output transmission (30) and a driven element (5). The input element (4) extends in axial direction through the driven element (5), is arranged coaxially to the driven element (5) and is in mechanical action connection with the driven element (5) via the output transmission (30) for outputting a drive force. The driven element (5) is rotatably supported at the stationary component (9) via a first driven bearing (61) and via a second driven bearing (62). The outer circumference of the first driven bearing (61) is designed to be smaller than the outer circumference of the second driven bearing (62).

Description

Technical Field

[0001] The present invention relates to a drive unit for a vehicle that can be operated by human power and a vehicle having the drive unit. Background Technology

[0002] Drive units for human-powered vehicles (such as electric bicycles) are known. Such drive units may have an electric motor that serves as an auxiliary mechanical drive mechanism for propelling the vehicle. The electric motor and mechanical drive mechanism drive a superimposed transmission assembly housed within the drive housing. Driving force can be transmitted from the superimposed transmission assembly to a sprocket located outside the drive housing via an output shaft. A long service life of the drive unit is crucial for the vehicle. Summary of the Invention

[0003] The object of this invention is to provide an improved drive unit that is compact and has an improved service life. This object is achieved by the subject matter described herein. Advantageous improvements are the subject matter of the dependent claims.

[0004] In a first aspect, a drive unit for a human-powered vehicle is provided. The vehicle may be a bicycle, an electric bicycle, or a power-assisted bicycle. The drive unit has an input element, a stationary member, an output transmission, and a driven element. The input element may be formed by a foot crank. The input element may have pedals. The stationary member may have at least one of a transmission housing and a housing cover. The output transmission may have a superimposed transmission (e.g., a planetary gear transmission). The driven element may be designed as a two-piece unit. The driven element may have at least one of a sprocket, a pulley, or spur gear teeth. The driven element may have a driven shaft.

[0005] The input element extends axially through the driven element. The input element may have a rotation axis, which may be oriented axially. The radial direction may be substantially perpendicular to the axial direction. The input element is arranged coaxially with the driven element. The input element is mechanically connected to the driven element via an output drive to output driving force. The driven element is rotatably supported at the stationary member via a first driven bearing and a second driven bearing. The input element is rotatably supported at the output element via an input bearing. The input element may be supported within the output element. The outer periphery of the first driven bearing is designed to be smaller than the outer periphery of the second driven bearing. The first driven bearing may be arranged within the second driven bearing in both the radial and axial directions. Thus, the driven element is stably supported at the stationary member, and the drive unit can be designed to be more compact.

[0006] If two elements are mechanically connected, they are directly or indirectly linked to each other, such that movement of one element causes a response in the other. For example, a mechanical connection can be provided through a form-locking connection or a friction-locking connection. A mechanical connection can manifest as the meshing of corresponding teeth of the two elements. Here, other elements, such as one or more spur gear stages, can be placed between these elements. Conversely, a permanently non-rotatable connection between two elements is understood as a connection in which the two elements are rigidly connected to each other in all specified states of the transmission. In this case, these elements can exist as individual parts that are non-rotatably connected to each other, or as a single piece.

[0007] The input element can be supported on the stationary member via a first input bearing. The input element can be supported on the driven element via a second input bearing. Thus, the driven element is rotatably supported on the input element via the second input bearing. The first input bearing can be arranged on a first side of the stationary member. The second input bearing can be arranged on a second side of the stationary member. The first side can be arranged opposite the second side with reference to the output transmission device. The second side can be the side of the drive unit where the driven element is arranged. The first input bearing can be formed by a radial bearing (e.g., a needle roller bearing). The second input bearing can be formed by a radial bearing (e.g., a ball bearing, such as a deep groove ball bearing). The second input bearing can be arranged radially within the first driven bearing. The second input bearing can be arranged in the same plane as the first driven bearing in the axial direction.

[0008] The driven shaft can be connected to a sprocket or pulley in a non-rotatable manner. The driven element can extend radially in a U-shape. The driven element can extend radially along the wall section of a stationary member (e.g., a housing cover) on both sides. The driven element can be connected to the output element of an output drive in a non-rotatable manner. The driven element can be connected to the gear ring of an output drive in a non-rotatable manner. The driven element can form the gear ring of the output drive. The driven shaft can form a gear ring on its inner circumference.

[0009] The stationary member may have a bearing housing for accommodating a first driven bearing. The stationary member may also have a bearing housing for accommodating a second driven bearing. At least one of the bearing housings for the first and second driven bearings may be constructed within the inner periphery of the stationary member. At least one of the bearing housings for the first and second driven bearings may be constructed within a housing cover. For example, the bearing housing for the first driven bearing may be constructed within the housing cover. For example, both the bearing housing for the first and second driven bearings may be constructed within the housing cover. Both the first and second driven bearings may be arranged on a second side of the stationary member. Therefore, the drive unit can be designed such that the first and second driven bearings are not arranged on opposite sides of the stationary member. Consequently, the bearing assembly for the driven element can be designed more compactly in the axial direction.

[0010] At least one of the first and second driven bearings can be formed of a rolling bearing (e.g., a ball bearing, tapered roller bearing, or needle roller bearing). For example, both the first and second driven bearings can be formed of a ball bearing. At least one of the first and second driven bearings can be formed of a radial bearing. Both the first and second driven bearings can be formed of a radial bearing.

[0011] In one embodiment of the drive unit, the second driven bearing may be arranged radially outside the output drive, at least partially coplanar with the output drive in the axial direction, and offset axially from the first driven bearing. The second driven bearing may be coplanar with the gear ring of the output drive in the axial direction. The second driven bearing may be radially outside the driven element of the output drive, such as the gear ring. Bearing housings for the first and second driven bearings may be respectively constructed on the inner periphery of the stationary member.

[0012] In one embodiment of the drive unit, the second driven bearing may be formed of a needle roller bearing. The second driven bearing may have an outer ring. The outer ring may be fixed to a bearing housing of a stationary member. Thus, the stationary member may be made of a lightweight material (e.g., aluminum). The outer ring may be press-fitted into the bearing housing for the second driven bearing. The outer ring may be locked axially via a locking element (e.g., a locking ring or snap ring). The rolling elements of the first driven bearing may contact the outer periphery of the driven member.

[0013] In one embodiment of the drive unit, the second driven bearing may be arranged axially offset from the output transmission device and coplanar with the first driven bearing in the axial direction. The bearing housing for the first driven bearing on the stationary member may be constructed on the inner periphery of the stationary member (e.g., a housing cover). The bearing housing for the second driven bearing on the stationary member may be constructed on the outer periphery of the stationary member (e.g., a housing cover). The bearing housing for the second driven bearing on the driven element may be constructed on the inner periphery of the driven element.

[0014] In one embodiment of the drive unit, the second driven bearing can be formed of a deep groove ball bearing. Thus, the drive unit can be constructed more compactly in both the axial and radial directions.

[0015] In one embodiment of the drive unit, the output drive may be arranged radially within the driven element. The output drive may be at least partially arranged axially within the driven element. The driven element may extend radially along the output drive. The driven element may extend radially beyond the output drive. The driven element may at least partially cover the outer periphery of the output drive in the axial direction.

[0016] In one embodiment of the drive unit, the drive unit may have a first electric motor having a first rotor. The output transmission device may have a planetary gear set having a first gear set element, a second gear set element, and a third gear set element. The first rotor may be mechanically connected to the first gear set element for inputting driving force. An input element may be non-rotatably connected to the second gear set element. The input element may be connected to the second gear set element in a manner that prevents relative rotation in at least one rotational direction. The input element may be connected to the second gear set element via a one-way clutch in a manner that prevents relative rotation in a first rotational direction and allows relative rotation in a second rotational direction opposite to the first rotational direction. The third gear set element may be non-rotatably connected to a driven element for outputting driving force. The first rotor may be mechanically connected to the first gear set element of the output transmission device via the first gear set. The first rotor may be mechanically connected to the first gear set element of the output transmission device via the second gear set. At least one of the first gear set and the second gear set may be formed by a planetary gear set. The first rotor may be mechanically connected to the first gear set element of the output transmission device via at least one of the first planetary gear set and the second planetary gear set.

[0017] The first planetary gear set may have a first sun gear, a first planetary carrier, one or more first planetary pins, one or more first planetary gears, and a first ring gear. The second planetary gear set may have a second sun gear, a second planetary carrier, one or more second planetary pins, one or more second planetary gears, and a second ring gear.

[0018] The rotor can be non-rotatably connected to the first sun gear. The first planetary gear set can be arranged radially within the second planetary gear set. The first and second planetary gear sets can be arranged in the same plane axially. The second planetary gear set can be arranged axially offset from the first planetary gear set.

[0019] The first sun gear can mesh with the first planetary gear. The first planetary gear can be supported at the first planetary gear pin via a bearing (e.g., a radial bearing, a deep groove ball bearing, a sliding bearing, or a needle roller bearing). The first planetary gear pin can be fixed to the first planetary gear carrier, for example, by being pressed into the first planetary gear carrier. The first planetary gear can mesh with the first ring gear. The first ring gear can be non-rotatably connected to the second sun gear. The sun gear ring can have the first ring gear formed at its inner circumference and the second sun gear formed at its outer circumference.

[0020] The second sun gear can mesh with the second planetary gear. The second planetary gear can be supported at the second planetary gear pin via a bearing (e.g., a radial bearing, deep groove ball bearing, sliding bearing, or needle roller bearing). The second planetary gear pin can be fixed to the second planetary gear carrier, for example, by being pressed into the second planetary gear carrier. The second planetary gear carrier can be fixed to a stationary member. The second planetary gear carrier can be constructed from a stationary member. The second planetary gear can mesh with the second ring gear. The second ring gear and the first planetary gear carrier can be non-rotatably connected to the output shaft. Thus, the first ring gear can be non-rotatably connected to the first planetary gear carrier.

[0021] An output transmission with a third planetary gear set may have at least one third sun gear, a third planetary carrier, and a third ring gear. The third planetary gear transmission may also have one or more third planetary pins and one or more third planetary gears. The third sun gear may mesh with the third planetary gears. The third planetary gears may be rotatably supported at the third planetary pins via bearings (e.g., radial bearings, deep groove ball bearings, plain bearings, or needle roller bearings). The third planetary pins may be fixed to the third planetary carrier, for example, pressed into the third planetary carrier. The third planetary gears may mesh with the third ring gear.

[0022] The first gear set element can be formed from a third sun gear. The output shaft can be non-rotatably connected to the third sun gear. The output shaft can form the third sun gear at its outer periphery. The second gear set element can be formed from a third planetary gear carrier. The third planetary gear carrier can be non-rotatably connected to the driven element. The third gear set element can be formed from a third ring gear. The third ring gear can be non-rotatably connected to the driven element.

[0023] At least one of the first electric motor, the first planetary gear set, and the second planetary gear set may be arranged axially on the first side of the output transmission. The power electronics for operating the first electric motor may be arranged coaxially with the driven element on the first side of the output transmission. The power electronics may be arranged on the first side of the first planetary gear set and the second planetary gear set.

[0024] In one embodiment of the drive unit, one of the first, second, and third gear set elements of the output transmission device can be rotatably supported at the driven element via a third driven bearing. For example, a third planetary gear carrier can be rotatably supported at the driven element. The third planetary gear carrier can be rotatably supported at a third gear ring. The third driven bearing can be designed as a radial bearing. The third driven bearing can be formed of a ball bearing (e.g., a deep groove ball bearing). The driven element can have a bearing housing for the third driven bearing at its inner circumference. The third driven bearing can be arranged axially offset relative to the first driven bearing toward a first side. The outer circumference of the third driven bearing can be smaller than the inner circumference of the second driven bearing. The outer circumference of the third driven bearing can be smaller than the outer circumference of the first driven bearing.

[0025] In one embodiment of the drive unit, a first sealing element, a second sealing element, and a third sealing element may be arranged at the driven element to seal the inner side of the stationary member relative to the outer side of the stationary member.

[0026] The second input bearing can be sealed relative to the outside of the drive unit via a first sealing element (e.g., a radial shaft seal). The first sealing element can be arranged axially offset from and adjacent to the second input bearing. The first sealing element can be positioned at the bearing housing for the second input bearing. The first sealing element can be fixed to the inner periphery of the driven element. The cylindrical section of the input element extending axially can slide in contact with the sealing lip of the first sealing element.

[0027] The first driven bearing can be sealed relative to the outside of the drive unit via a second sealing element (e.g., a radial shaft seal). The second sealing element can be arranged axially offset from and adjacent to the first driven bearing. The second sealing element can be positioned at the bearing housing for the first driven bearing. The second sealing element can be fixed to the inner circumference of the stationary member. An axially projecting protrusion or a cylindrical surface extending axially can slide in contact with the sealing lip of the second sealing element.

[0028] A third sealing element (e.g., an O-ring) may be arranged at the inner circumference of the sprocket or pulley and at the outer circumference of the driven shaft to seal the inner side of the stationary component relative to the outer side.

[0029] In one embodiment of the drive unit, the drive unit may have a second electric motor with a second rotor. The second rotor may be mechanically connected to a driven element via a transmission gear mechanism for outputting driving force. The driven element may have teeth (e.g., external teeth) for mechanical connection with the second rotor. The external teeth may be formed from spur gear teeth or sprocket teeth. The external teeth may engage with teeth of the transmission gear mechanism. The external teeth may be arranged outside a bearing housing of the driven element for a second driven bearing. The second driven bearing may be arranged in the same plane as the external teeth in the axial direction. The second driven bearing may be arranged to be offset from the external teeth in the axial direction. The second driven bearing may be arranged adjacent to or beside the external teeth in the axial direction.

[0030] In one aspect, the vehicle has at least one drive wheel and a drive unit according to one of the foregoing embodiments. The vehicle can be operated manually. The vehicle can be a bicycle, an electric bicycle, or a power-assisted bicycle. The drive wheel is mechanically connected to the drive unit via a driven element, such that the drive unit can move the vehicle forward. The vehicle may have other devices, such as braking or steering mechanisms. Attached Figure Description

[0031] Figure 1 A cross-sectional view of one embodiment of the drive unit is shown.

[0032] Figure 2 A cross-sectional view of another embodiment of the drive unit is shown.

[0033] Figure 3 A cross-sectional view of another embodiment of the drive unit is shown.

[0034] Figure 4 A cross-sectional view of another embodiment of the drive unit is shown. Detailed Implementation

[0035] Figure 1A cross-sectional view of one embodiment of the drive unit is shown. The drive unit can be used in vehicles that can be operated manually (currently electric bicycles). The drive unit has an input element 4 (currently a pedal crankshaft), a stationary member 9 (currently a transmission housing with a cover), an output transmission 30, and a driven element 5. The drive unit also has a first electric motor 70 arranged coaxially with the driven element 5 and mechanically connected to the driven element 5 via the output transmission 30 to output driving force. The input element 4 extends axially through the driven element 5, coaxial with it. The input element 4 is mechanically connected to the driven element 5 via the output transmission 30 to output driving force.

[0036] Driven element 5 is supported on stationary member 9 via first driven bearing 61 and second driven bearing 62. The transmission housing has a bearing seat for the first driven bearing 61 on its inner periphery. The housing cover has a bearing seat for the second driven bearing 62 on its inner periphery. Driven element 5 is rotatably supported on input element 4 via input bearing 42 (currently the second input bearing 42). Thus, driven element 5 is stably supported in stationary member 9, resulting in a long service life for the drive unit. The outer periphery of the first driven bearing 61 is designed to be smaller than the outer periphery of the second driven bearing 62.

[0037] The following describes other details of the drive unit.

[0038] The driven element 5 currently has a sprocket and a driven shaft. The driven shaft has bearing housings for a first driven bearing 61 and a second driven bearing 62. The bearing housing for the first driven bearing 61 is arranged at the outer periphery of the driven shaft. The bearing housing for the second driven bearing 62 is also arranged at the outer periphery of the driven shaft. The second driven bearing 62 is arranged axially offset from the first driven bearing 61 toward a first side. The second driven bearing 62 is arranged radially outside the output drive 30 and axially in the same plane as the output drive 30.

[0039] The sprocket and driven shaft are connected in a non-rotatable manner. The driven shaft is located from the first side ( Figure 1 The left side of the shell cover extends through the wall section of the stationary member 9 to the second side ( Figure 1 The driven shaft extends radially outward along the wall section on the right side of the stationary member 9. A wall section of the stationary member 9 is arranged on the second side of the stationary member 9. The driven shaft extends radially outward from the driven shaft along the wall section on the first side (i.e., the inner side of the stationary member 9). Therefore, the driven element 5 forms a U-shaped cross-section extending along a portion of the wall section of the stationary member 9.

[0040] Input element 4 is rotatably supported in stationary member 9 via a first input bearing 41 (currently a needle roller bearing) on ​​a first side with reference to stationary member 9. Input element 4 is rotatably supported in driven element 5 via a second input bearing 42 (currently a deep groove ball bearing) on ​​a second side with reference to stationary member 9. Thus, input element 4 is supported on opposite sides of stationary member 9. The first input bearing 41 is arranged within the first motor 70 in both the axial and radial directions. The second input bearing 42 is arranged within the first driven bearing 61 in the radial direction. The second input bearing 42 is arranged in the same plane as the first driven bearing 61 in the axial direction. The outer periphery of the second input bearing 42 is smaller than the inner periphery of the first driven bearing 61.

[0041] A first sealing element 91 (currently a radial shaft seal) is arranged adjacent to the second input bearing 42 in the axial direction and offset from the second input bearing 42 towards the second side. The first sealing element 91 is fixed to the inner circumference of the driven shaft. The cylindrical section of the input element 4 extending in the axial direction slides in contact with the sealing lip of the first sealing element 91. A second sealing element 92 is arranged adjacent to the first driven bearing 61 and offset from the first driven bearing 61 towards the second side in the axial direction. The second sealing element 92 is fixed to the inner circumference of the wall section. The outer side of the protrusion of the sprocket protruding towards the first side in the axial direction slides in contact with the sealing lip of the second sealing element 92. A third sealing element 93 (currently an O-ring) abuts against the inner circumference of the sprocket and the outer circumference of the driven shaft. The first sealing element 91, the second sealing element 92, and the third sealing element 93 fluidly seal the inner side of the stationary member 9 relative to the outer side of the stationary member 9.

[0042] Figure 2 A cross-sectional view of another embodiment of the drive unit is shown. The main difference between the current embodiment and the previous embodiment lies in the design of the output transmission device 30. With reference to the first motor 70, the output transmission device 30 is arranged on the second side. Furthermore, the drive unit of the current embodiment has a first planetary gear set 10 and a second planetary gear set 20, which are arranged axially between the first motor 70 and the output transmission device 30. The output transmission device 30 is formed by a third planetary gear set and includes a third sun gear 31, a third planetary gear carrier 32, a plurality of third planetary gear pins 33, a plurality of third planetary gears 34, and a third ring gear 35.

[0043] The third sun gear 31 is mechanically connected to the first planetary gear set 10 and the second planetary gear set 20. The third sun gear 31 meshes with the third planetary gear 34. The third planetary gear 34 is supported by needle roller bearings at one of the third planetary gear pins 33. The third planetary gear pin 33 is fixed to the third planetary gear carrier 32. The third planetary gear carrier 32 is non-rotatably connected to the input element 4. The third planetary gear 34 meshes with the third ring gear 35. The third ring gear 35 is non-rotatably connected to the driven shaft of the driven element 5. The third ring gear 35 is constructed on the inner circumference of the driven shaft. The second driven bearing 62 is arranged radially outside the third ring gear 35 and in the same plane as the third ring gear 35 in the axial direction.

[0044] Figure 3 A cross-sectional view of another embodiment of the drive unit is shown. The current embodiment has all the features of at least one of the foregoing embodiments. The current drive unit has a second motor 80 and a transmission gear mechanism 37. The first motor 70 has a first rotor 71 and a first stator 72. The second motor 80 has a second rotor 81 and a second stator 82.

[0045] The first planetary gear set 10 has a first sun gear 11, a first planetary carrier 12, a plurality of first planetary pins 13, a plurality of first planetary gears 14, and a first ring gear 15. The second planetary gear set 20 has a second sun gear 21, a second planetary carrier 22, a plurality of second planetary pins 23, a plurality of second planetary gears 24, and a second ring gear 25. The second planetary gear set 20 is arranged radially outside the first planetary gear set 10. The second planetary gear set 20 and the first planetary gear set 10 are arranged in the same plane in the axial direction. Thus, the first planetary gear set 10 and the second planetary gear set 20 form a nested gear set.

[0046] The first sun gear 11 is non-rotatably connected to the first rotor 71. The first sun gear 11 meshes with the first planetary gears 14. Each of the first planetary gears 14 is supported at one of the first planetary gear pins 13 via a bearing (currently a needle roller bearing). The first planetary gear pins 13 are fixed to the first planetary gear carrier 12. The first planetary gears 14 mesh with the first ring gear 15. The sun ring gear forms the first ring gear 15 at its inner circumference and the second sun gear 21 at its outer circumference. Thus, the first ring gear 15 and the second sun gear 21 are non-rotatably connected.

[0047] The second sun gear 21 meshes with the second planetary gears 24. Each of the second planetary gears 24 is supported at one of the second planetary gear pins 23 via a bearing (currently a needle roller bearing). The second planetary gear pins 23 are fixed to the second planetary gear carrier 22. The second planetary gears 24 mesh with the second ring gear 25. The second ring gear 25 and the first planetary gear carrier 12 are non-rotatably connected to the output shaft 7. Thus, the second ring gear 25 and the first planetary gear carrier 12 are non-rotatably connected. The first output shaft 7 is non-rotatably connected to the third sun gear 31.

[0048] The second planetary gear carrier 22 is formed by the stationary member 9. The sun gear ring can rest against the second planetary gear carrier 22 on the first side in the axial direction, thereby restricting the movement of the sun gear ring in the axial direction.

[0049] The second motor 80 is arranged parallel to the axis of the first motor 70. The second motor 80 is mechanically connected to the driven shaft of the driven element 5 via a transmission gear mechanism 37. For this purpose, the driven shaft of the driven element 5 has teeth 36 on its outer periphery. The teeth 36 are arranged axially offset from the second driven bearing 62. The teeth 36 are arranged in the same plane as the second input bearing 42 in the axial direction. The outer diameter of the teeth 36 is smaller than the outer diameter of the second driven bearing 62.

[0050] Figure 4 Another cross-sectional view of one embodiment of the drive unit is shown. The main difference between the current embodiment and the previous embodiment lies in the design of the second driven bearing 62 and the driven element 5.

[0051] Currently, the second driven bearing 62 is constructed as a deep groove ball bearing. The second driven bearing 62 is arranged axially offset from the output transmission device 30 towards the second side. The outer diameter of the second driven bearing 62 is smaller than the outer diameter of the third gear ring 35. The second driven bearing 62 is arranged in the same plane as the first driven bearing 61 in the axial direction. The housing cover of the stationary member 9 forms a bearing seat for the second driven bearing 62 at its outer periphery.

[0052] The driven shaft of the driven element 5 forms a bearing housing for the second driven bearing 62 at its inner circumference. The teeth 36 and the second driven bearing 62 are arranged in the same plane in the axial direction. The teeth 36 are arranged in the region of the bearing housing for the second driven bearing 62 in the axial direction and in the outer part of the bearing housing for the second driven bearing 62 in the radial direction. In the current embodiment, the drive unit does not have a third driven bearing 63. The first sealing element 91, the second sealing element 92, and the third sealing element 93 are not shown. List of reference numerals in the attached diagram: 4 Input Elements 5 Driven elements 7 Output shaft 9. Static components 10 First Planetary Gear Set 11 First Sun Gear 12 First Planetary Gear Carrier 13 First planetary gear pin 14 First Planetary Gear 15 First gear ring 20 Second Planetary Gear Set 21 Second Sun Gear 22 Second Planetary Gear Carrier 23 Second planetary gear pin 24 Second Planetary Gear 25 Second gear ring 30 Output transmission device 31 Third Sun Gear 32 Third Planetary Gear Carrier 33 Third planetary gear pin 34 Third Planetary Gear 35 Third gear ring 36 teeth 37. Transmission Gear Mechanism 41 First Input Bearing 42 Second Input Bearing 61 First driven bearing 62 Second driven bearing 63 Third driven bearing 70 First Electric Motor 71 First Rotor 72 First stator 80 Second Electric Motor 81 Second Rotor 82 Second stator 91 First sealing element 92 Second sealing element 93. Third sealing element.

Claims

1. A drive unit for a human-operated vehicle, wherein, The drive unit has an input element (4), a stationary component (9), an output transmission device (30), and a driven element (5), wherein, - The input element (4) extends axially through the driven element (5), is arranged coaxially with the driven element (5), and is mechanically connected to the driven element (5) via the output transmission device (30) to output driving force. - The driven element (5) is rotatably supported on the stationary member (9) via a first driven bearing (61) and a second driven bearing (62). - The input element (4) is rotatably supported on the driven element (5) via the input bearing (42), and - The outer periphery of the first driven bearing (61) is designed to be smaller than the outer periphery of the second driven bearing (62).

2. The driving unit according to claim 1, characterized in that, The second driven bearing (62) is arranged outside the output drive (30) in the radial direction, at least partially in the same plane as the output drive (30) in the axial direction, and is arranged to be offset from the first driven bearing (61) in the axial direction.

3. The driving unit according to claim 2, characterized in that, The second driven bearing (62) is formed of a needle roller bearing.

4. The driving unit according to claim 1, characterized in that, The second driven bearing (62) is arranged to be offset from the output drive (30) in the axial direction and to be arranged in the same plane as the first driven bearing (61) in the axial direction.

5. The driving unit according to claim 4, characterized in that, The second driven bearing (62) is formed of a deep groove ball bearing.

6. The driving unit according to any one of the preceding claims, characterized in that, The output drive device (30) is arranged in the radial direction within the driven element (5).

7. The driving unit according to any one of the preceding claims, characterized in that, - The drive unit has a first motor (70) and the first motor has a first rotor (71). - The output transmission device (30) has a planetary gear set, which has a first gear set element, a second gear set element and a third gear set element. - The first rotor (71) is mechanically connected to the first gear set element to input driving force. - The input element (4) is connected to the second gear set element in a manner that prevents relative rotation in at least one rotational direction, and - The third gear set element and the driven element (5) are connected in a non-rotatable manner to output driving force.

8. The driving unit according to claim 7, characterized in that, One of the first gear set element, the second gear set element, and the third gear set element of the output transmission device (30) is rotatably supported at the driven element (5) via a third driven bearing (63).

9. The driving unit according to any one of the preceding claims, characterized in that, A first sealing element (91), a second sealing element (92) and a third sealing element (93) are arranged at the driven element (5) to seal the inner side of the stationary member (9) relative to the outer side of the stationary member (9).

10. The driving unit according to any one of the preceding claims, characterized in that, The drive unit has a second motor (80), which has a second rotor (82) and is mechanically connected to the driven element (5) via a transmission gear mechanism (37) to output driving force.

11. A vehicle having at least one drive wheel and a drive unit according to claims 1 to 10, wherein, - The vehicle can be operated manually, and - The drive wheel is mechanically connected to the drive unit via a driven element (5), thereby enabling the drive unit to move the vehicle forward.

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