Driving unit of pedal vehicle and pedal vehicle

Abstract

The invention discloses a driving unit of a pedal vehicle and the pedal vehicle. The driving unit comprises a main epicyclic gear set, a first motor and a pedal shaft. The main epicyclic gear set comprises a first gear element, a second gear element, a sun gear and a plurality of planetary gears; the sun gear is in meshed connection with the planetary gear, and the first gear element and the sun gear drive the second gear element to rotate through the planetary gear; the second gear element is used for driving the chain wheel to rotate. The first motor is connected with the sun gear; the first motor is used for driving the sun gear to rotate; the pedal shaft is connected with the first gear element; the pedal shaft is used for driving the first gear element to rotate. According to the technical scheme, the gear switching smoothness of the driving unit in the pedal vehicle can be improved, the structure of the driving unit is simplified, and the overall weight of the driving unit is reduced.

Description

Technical Field

[0001] The present invention relates to the field of power technology, and in particular to a driving unit of a pedal vehicle and the pedal vehicle. Background Art

[0002] The powertrain of a pedal-type vehicle includes a motor, a reducer and a control system. A pedal-type vehicle requires a powertrain with a transmission to adjust the speed ratio of a bicycle. The structure of the vehicle is complex, the maintenance cost of the transmission is high, and it is difficult to achieve lightweight maintenance.

[0003] Existing pedal-type vehicles can only adjust the transmission ratio of fixed gears. Users need to manually operate the gear shift actuator to select the appropriate gear according to the current riding conditions, and the gear needs to be adjusted step by step. The chain will stall during the gear shifting process, and the user experience is poor. Summary of the invention

[0004] The present invention provides a driving unit of a pedal vehicle and a pedal vehicle, which can improve the smoothness of gear switching of the driving unit, simplify the structure of the driving unit, and reduce the overall weight of the driving unit.

[0005] In a first aspect, the present invention provides a driving unit for a pedal vehicle, comprising:

[0006] The main epicyclic gear set includes a first gear element, a second gear element, a sun gear and a plurality of planetary gears; the sun gear is meshed with the planetary gears, the first gear element and the sun gear drive the second gear element to rotate through the planetary gears; the second gear element is used to drive the crankshaft to rotate;

[0007] A first motor is connected to the sun gear; the first motor is used to drive the sun gear to rotate;

[0008] A pedal shaft is connected to the first gear element; the pedal shaft is used to drive the first gear element to rotate.

[0009] In a second aspect, the present invention provides a scooter vehicle comprising the scooter vehicle drive unit according to the first aspect.

[0010] The technical solution provided by the present invention is to set a first motor so that the first motor drives the sun gear in the main epicyclic gear set to rotate, the pedal shaft drives the first gear element in the main epicyclic gear set to rotate, the first gear element and the sun gear drive the second gear element to rotate through the planetary gear, so that the rotation speed of the sun gear is gradually increased or decreased by the first motor, so as to smoothly adjust the rotation speed of the second gear element, thereby improving the smoothness of the gear switching of the toothed disc, so that the drive unit can achieve stepless smooth speed regulation. At the same time, only one first motor is set, which can simplify the structure of the drive unit, make the structure of the drive unit compact, and reduce the overall weight of the drive unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the structure of a first driving unit provided by an embodiment of the present invention;

[0012] Figure 2 A schematic diagram of the structure of a second driving unit provided by an embodiment of the present invention;

[0013] Figure 3 A schematic structural diagram of a third driving unit provided by an embodiment of the present invention;

[0014] Figure 4 A schematic structural diagram of a fourth driving unit provided by an embodiment of the present invention;

[0015] Figure 5 A schematic structural diagram of a fifth driving unit provided by an embodiment of the present invention;

[0016] Figure 6 A schematic structural diagram of a roller clutch provided by an embodiment of the present invention;

[0017] Figure 7 A schematic structural diagram of a sixth driving unit provided by an embodiment of the present invention;

[0018] Figure 8 A schematic structural diagram of a seventh driving unit provided by an embodiment of the present invention;

[0019] Fig. 9 A schematic structural diagram of an eighth driving unit provided by an embodiment of the present invention;

[0020] Fig.10 A schematic structural diagram of a ninth driving unit provided by an embodiment of the present invention;

[0021] Fig.11 A schematic structural diagram of a tenth driving unit provided by an embodiment of the present invention;

[0022] Fig.12 A schematic structural diagram of an eleventh driving unit provided in an embodiment of the present invention;

[0023] Fig.13 A schematic structural diagram of a twelfth driving unit provided by an embodiment of the present invention;

[0024] Fig.14 A schematic structural diagram of a thirteenth driving unit provided in an embodiment of the present invention;

[0025] Fig.15 A schematic structural diagram of a fourteenth driving unit provided in an embodiment of the present invention;

[0026] Fig.16 A schematic structural diagram of a fifteenth driving unit provided in an embodiment of the present invention;

[0027] Fig.17 A schematic structural diagram of a sixteenth driving unit provided in an embodiment of the present invention;

[0028] Fig.18 A structural schematic diagram of a seventeenth driving unit provided in an embodiment of the present invention;

[0029] Fig.19 A schematic structural diagram of an eighteenth driving unit provided by an embodiment of the present invention;

[0030] Fig. 20 A schematic structural diagram of a nineteenth driving unit provided in an embodiment of the present invention;

[0031] Fig.21 A schematic structural diagram of a twentieth driving unit provided by an embodiment of the present invention;

[0032] Fig. 22 A schematic structural diagram of a twenty-first driving unit provided in an embodiment of the present invention;

[0033] Fig.23 A schematic structural diagram of a twenty-second driving unit provided in an embodiment of the present invention;

[0034] Fig.24 A schematic structural diagram of a twenty-third driving unit provided in an embodiment of the present invention;

[0035] Fig.25 A schematic structural diagram of a twenty-fourth driving unit provided in an embodiment of the present invention;

[0036] Fig.26 A schematic structural diagram of a pedal vehicle provided by an embodiment of the present invention;

[0037] The reference numerals are described as follows:

[0038] 10. Main circulating gear set; 11. Sun gear; 12. Planetary gear; 13. Outer ring gear; 14. Planetary carrier; 20. Sprocket; 30. Pedal shaft; 41. First motor; 42. Second motor; 21. First one-way clutch; 22. Second one-way clutch; 23. Third one-way clutch; 51. First reduction gear set; 52. Second reduction gear set; 54. Fourth one-way clutch; 55. Fifth one-way clutch. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] An embodiment of the present invention provides a pedal vehicle, Fig.26 A schematic diagram of the structure of a pedal vehicle provided by an embodiment of the present invention is shown in FIG. Fig.26 As shown, the scooter vehicle 200 includes the drive unit 100 provided by any embodiment of the present invention. Therefore, the scooter vehicle 200 has the technical features of the drive unit 100 provided by the embodiment of the present invention, and can achieve the beneficial effects of the drive unit 100 provided by the embodiment of the present invention. For the similarities, please refer to the following description of the drive unit 100 provided by the embodiment of the present invention, which will not be repeated here.

[0041] By providing the driving unit 100 in the pedal vehicle 200 , when the user steps on the pedal vehicle 200 , the driving unit 100 can provide a certain amount of assistance to the user, thereby saving the user's pedaling effort and improving the user's use experience.

[0042] Figure 1 A schematic diagram of the structure of a first driving unit provided in an embodiment of the present invention, Figure 2 A schematic diagram of the structure of a second driving unit provided in an embodiment of the present invention, referring to Figure 1 and Figure 2 The driving unit 100 includes: a main epicyclic gear set 10, a first motor 41, a pedal shaft 30 and a chainring 20. The main epicyclic gear set 10 includes a first gear element, a second gear element, a sun gear 11 and a plurality of planetary gears 12; the sun gear 11 is meshedly connected with the planetary gears 12, and the first gear element and the sun gear 11 drive the second gear element to rotate through the planetary gears 12, and the second gear element is used to drive the chainring 20 to rotate. The first motor 41 is connected to the sun gear 11; the first motor 41 is used to drive the sun gear 11 to rotate. The pedal shaft 30 is connected to the first gear element. The pedal shaft 30 is used to drive the first gear element to rotate. The chainring 20 is connected to the second gear element; the second gear element is used to drive the chainring 20 to rotate.

[0043] The main epicyclic gear set 10 includes a sun gear 11, a plurality of planetary gears 12, a planet carrier 14 and an outer gear ring 13. The sun gear 11 and the plurality of planetary gears 12 are located in the circle of the outer gear ring 13. The planetary gears 12 are meshed with the sun gear 11 and the outer gear ring 13 respectively. The planet carrier 14 is fixedly connected with each planetary gear 12. When each planetary gear 12 revolves around the central axis of the sun gear 11, each planetary gear 12 drives the planet carrier 14 to rotate. Conversely, the planet carrier 14 can also drive each planetary gear 12 to revolve around the central axis of the sun gear 11.

[0044] Specifically, by arranging the main epicyclic gear set 10 in the drive unit 100, and connecting the first motor 41 to the sun gear 11, the pedal shaft 30 to the first gear element, and the chainring 20 to the second gear element, after the user provides the first power torque to the first gear element through the pedal shaft 30, and the first motor 41 provides the second power torque to the sun gear 11, the first gear element and the sun gear 11 can drive the second gear element to rotate through the planetary gear 12 under the action of the first power torque and the second power torque. By arranging the first motor 41, the first motor 41 can adjust the second power torque provided to the sun gear 11 in real time to adjust the transmission ratio between the first gear element and the second gear element, and different transmission ratios correspond to different gears. Exemplarily, when the drive unit 100 is adjusted from a lower gear to a higher gear, the first motor 41 can gradually increase the second power torque provided to the sun gear 11, so that the drive unit 100 can smoothly switch from a lower gear to a higher gear, and achieve stepless smooth speed regulation.

[0045] It should be noted that the first gear element and the sun gear 11 drive the second gear element to rotate through the planetary gear 12, so the speed of the second gear element is related to the speed of the first gear element and the speed of the sun gear 11. Exemplarily, V2 = K1 × f1 + K2 × V1, f1 is the pedal frequency of the pedal shaft 30, V1 is the speed of the sun gear 11, K1 and K2 are constant coefficients corresponding to the structure of the main revolving gear set 10, V2 is the speed of the second gear element, the pedal frequency of the pedal shaft 30 determines the speed of the first gear element, and the speed of the first motor 41 determines the speed of the sun gear 11, so the speed of the sun gear 11 can be adjusted by the first motor 41, so that the second gear element has a different speed, thereby driving the chainring 20 to achieve different gear switching.

[0046] It is understandable that the basis for the first motor 41 to adjust the speed of the sun gear 11 can be set according to actual needs. In an optional embodiment, the drive unit 100 may also include parameter acquisition devices such as a torque sensor, a cadence sensor, a wheel end speed sensor, and a posture sensor. The parameter acquisition device transmits the acquired current torque, current cadence, current wheel end speed, and current posture to the first motor 41. The control module inside the first motor 41 determines the power demand of the current user based on the above parameters, and then gradually increases or decreases the speed of the sun gear 11 according to the power demand, and then smoothly adjusts the current gear of the drive unit 100 to achieve stepless speed regulation and enhance the user's driving experience. Exemplarily, the drive unit 100 may include a plurality of gears, namely, gear 1, gear 2, ..., gear N, etc., with the rotation speed increasing in sequence. When the first motor 41 determines that the current user needs to increase to gear 1 according to the current parameters, the first motor 41 may gradually increase the rotation speed of the sun gear 11 until the rotation speed of the second gear element corresponds to gear 1 under the action of the rotation speed of the sun gear 11 and the rotation speed of the first gear element; correspondingly, when the first motor 41 determines that the current user needs to reduce to gear 2 according to the current parameters, the first motor 41 may gradually reduce the rotation speed of the sun gear 11 until the rotation speed of the second gear element corresponds to gear 2 under the action of the rotation speed of the sun gear 11 and the rotation speed of the first gear element. In the above adjustment process, the drive unit 100 can realize smooth switching of gears only through the first motor 41, without the need to set a complex transmission device, so that the structure of the drive unit 100 is simple and the weight of the whole vehicle is reduced.

[0047] The technical solution of the embodiment of the present invention is to set a first motor so that the first motor drives the sun gear in the main epicyclic gear set to rotate, the pedal shaft drives the first gear element in the main epicyclic gear set to rotate, and the first gear element and the sun gear drive the second gear element to rotate through the planetary gear, so that the rotation speed of the sun gear is gradually increased or decreased by the first motor, so as to smoothly adjust the rotation speed of the second gear element, thereby improving the smoothness of the gear shift of the toothed disc, so that the drive unit can achieve stepless smooth speed regulation. At the same time, only one first motor is set, which can simplify the structure of the drive unit, make the structure of the drive unit compact, and reduce the overall weight of the drive unit, thereby achieving lightweight pedal vehicles.

[0048] It should be noted that the first gear element and the second gear element can be configured according to actual needs. In an optional embodiment, refer to Figure 1 The first gear element is an outer gear ring 13 meshing with the planetary gears 12, and the second gear element is a planetary carrier 14 fixedly connected to each planetary gear 12. The central axis of the sun gear 11 is not coaxial with the pedal shaft 30.

[0049] Specifically, since the pedal shaft 30 drives the outer gear ring 13 to rotate, and the central axis of the main epicyclic gear set 10 or the sun gear 11 is located inside the outer gear ring 13, the pedal shaft 30 is located outside the outer gear ring 13, so the central axis of the sun gear 11 is not coaxial with the pedal shaft 30. The crankset 20 can rotate around the central axis of the sun gear 11 or around the pedal shaft 30, which can be set according to actual needs. Figure 1 Only the structure in which the toothed disc 20 rotates around the central axis of the sun gear 11 and the toothed disc 20 is meshed with the planet carrier 14 is shown. In this structure, the toothed disc 20 is directly meshed with the planet carrier 14, so that the planet carrier 14 directly drives the toothed disc 20 to rotate, and no other transmission mechanism is required between the planet carrier 14 and the toothed disc 20, thereby simplifying the overall structure of the drive unit 100. In an optional embodiment, Figure 3 A schematic diagram of the structure of a third driving unit provided in an embodiment of the present invention is shown in FIG. Figure 3 As shown, the chainring 20 rotates around the pedal shaft 30. Since the pedal shaft 30 is not coaxial with the central axis of the main epicyclic gear set 10, and the planet carrier 14 rotates around the central axis of the main epicyclic gear set 10, when the chainring 20 rotates around the pedal shaft 30, a second transmission member 32 can be provided between the chainring 20 and the planet carrier 14, and the second transmission member 32 includes a second gear, which is fixedly connected to the chainring 20, and the second gear is meshedly connected to the planet carrier 14. When the planet carrier 14 rotates, the chainring 20 can be driven to rotate by the second transmission member 32.

[0050] It is understandable that the structure in which the pedal shaft 30 drives the outer gear ring 13 to rotate can be set according to actual needs. Figure 1 or Figure 3 , a first transmission member 31 may be provided between the outer gear ring 13 and the pedal shaft 30, the first transmission member 31 includes a first gear, the first gear is fixedly connected to the pedal shaft 30, the first gear is meshed with the outer gear ring 13, when the pedal shaft 30 rotates, the outer gear ring 13 may be driven to rotate by the transmission member 31. In other optional embodiments, at least one deceleration / acceleration gear set may be provided between the first gear element (the outer gear ring 13 or the planetary carrier 14) and the pedal shaft 30, so that the travel speed of the pedal vehicle may be increased or decreased when the user provides a certain pedaling torque, so as to save manpower. In other optional embodiments, at least one deceleration / acceleration gear set may be provided between the second gear element (the outer gear ring 13 or the planetary carrier 14) and the chainring 20, so that the travel speed of the pedal vehicle may be increased or decreased when the drive unit provides a certain driving torque.

[0051] In another alternative embodiment, reference Figure 2The first gear element is a planet carrier 14 fixedly connected to each planetary gear 12, and the second gear element is an outer gear ring 13 meshingly connected to the planetary gear 12. The central axis of the sun gear 11 is coaxial with the pedal shaft 30.

[0052] Specifically, since the pedal shaft 30 drives the planetary carrier 14 to rotate, and the planetary carrier 14 rotates around the central axis of the main epicyclic gear set 10 or the sun gear 11, the central axis of the sun gear 11 can be set to be coaxial with the pedal shaft 30, and the chainring 20 rotates around the pedal shaft 30, making the overall structure of the drive unit 100 more compact.

[0053] Optional, Figure 4 A schematic diagram of the structure of a fourth driving unit provided in an embodiment of the present invention, Figure 5 A schematic diagram of the structure of a fifth driving unit provided in an embodiment of the present invention, referring to Figure 4 and Figure 5 The drive unit 100 further includes a first one-way clutch 21, which is connected to the pedal shaft 30, the crankset 20 and the second gear element respectively. The first one-way clutch 21 is used to transmit the first power torque provided by the pedal shaft 30 and the second power torque provided by the second gear element to the crankset 20.

[0054] The first one-way clutch 21 includes an overrunning clutch or a toothed clutch, etc., which can be set according to actual needs. The overrunning clutch includes a ratchet pawl clutch and a friction clutch, which can be selected according to needs.

[0055] For ease of description, the following embodiments are described by taking the first one-way clutch 21 as a roller clutch as an example. Figure 6 A schematic diagram of the structure of a roller clutch provided by an embodiment of the present invention is shown in FIG. Figure 6As shown, the roller clutch comprises an inner star wheel 1, an outer ring 2, and a spring push rod 3 and a ball 4 located between the outer ring 2 and the inner star wheel 1. The spring push rod 3 can push the ball 4 into the wedge-shaped groove of the inner star wheel 1 so that the inner star wheel 1 and the outer ring 2 rotate synchronously. The outer ring 2 and the inner star wheel 1 can both be used as driving wheels. When the inner star wheel 1 is used as the driving part and rotates in the direction X, the ball 4 is wedged in the wedge groove under the action of friction, so the inner star wheel 1 drives the outer ring 2 to rotate synchronously; when the inner star wheel 1 rotates in the opposite direction to the direction X, the ball 4 is pushed to the wider area of ​​the wedge groove under the action of friction, and the inner star wheel 1 is separated from the outer ring 2, and the inner star wheel 1 cannot drive the outer ring 2 to rotate; when the inner star wheel 1 still rotates in the direction X, and there is another kinematic chain that can drive the outer ring 2 to rotate in the direction X, and the rotation speed of the outer ring 2 is greater than the rotation speed of the inner star wheel 1, the inner star wheel 1 and the outer ring 2 are still in a disengaged state, and the inner star wheel 1 and the outer ring 2 rotate separately. Optionally, the first one-way clutch 21 includes at least an outer ring, the outer ring is connected to the toothed disc 20 through a transmission component, and the outer ring is connected to the second gear element.

[0056] Specifically, refer to Figure 4, the pedal shaft 30 is fixedly connected to the inner star wheel in the first one-way clutch 21, the outer ring in the first one-way clutch 21 is meshed with the second gear element (planet carrier 14), the outer ring of the first one-way clutch 21 can be fixedly connected to the toothed disc 20 through a sleeve shaft or other transmission components, and the outer ring can drive the toothed disc 20 to rotate through a sleeve shaft or other transmission components. The first power torque provided by the pedal shaft 30 drives the inner star wheel of the first one-way clutch 21 to rotate in the positive direction, and the second gear element (planet carrier 14) outputs the second power torque to the outer ring of the first one-way clutch 21 under the joint action of the first motor 41 and the pedal shaft 30. If the rotation speed of the inner star wheel driven by the first power torque in the positive direction is less than the rotation speed of the outer ring driven by the second power torque in the positive direction, the inner star wheel in the first one-way clutch 21 is separated from the outer ring, and the second power torque provided by the second gear element (planet carrier 14) is transmitted to the toothed disc 20 through the first clutch 21, or through the transmission component connecting the second gear element (planet carrier 14) and the toothed disc 20, thereby driving the toothed disc 20 to rotate. When the first power torque provided by the pedal shaft 30 drives the inner star wheel of the first one-way clutch 21 to rotate in the reverse direction, the inner star wheel in the first one-way clutch 21 is disengaged from the outer ring, and the second power torque provided by the second gear element (planet carrier 14) is transmitted to the tooth plate 20 through the first one-way clutch 21, or through the transmission component connecting the second gear element (planet carrier 14) and the tooth plate 20, thereby driving the tooth plate 20 to rotate. When the first motor 41 is powered off or shut down due to a fault, by setting the first one-way clutch 21, the first power torque provided by the pedal shaft 30 can be directly transmitted to the tooth plate 20 through the first one-way clutch 21, thereby improving the power transmission efficiency. Among them, when the tooth plate 20 rotates in the positive direction, the device where the drive unit 100 is located can be made to move forward, and the reverse direction is opposite to the positive direction. In this way, when the first motor 41 is powered off or works abnormally, the pedal vehicle can still maintain normal driving, avoiding the pedal vehicle from being unable to be used and affecting the user experience.

[0057] Accordingly, reference Figure 5The pedal shaft 30 is fixedly connected to the inner star wheel in the first one-way clutch 21, the outer ring in the first one-way clutch 21 is connected to the second gear element (outer gear ring 13) through the third transmission member 33, the outer ring in the first one-way clutch 21 can be fixedly connected to the chainring 20 through a sleeve shaft, etc., and the outer ring can drive the chainring 20 to rotate through a sleeve shaft, etc. The first power torque provided by the pedal shaft 30 drives the inner star wheel of the first one-way clutch 21 to rotate in the positive direction. Under the joint action of the first motor 41 and the pedal shaft 30, the second gear element (outer gear ring 13) outputs the second power torque to the outer ring of the first one-way clutch 21. If the rotation speed of the inner star wheel in the positive direction driven by the first power torque is less than the rotation speed of the outer ring in the positive direction driven by the second power torque, the inner star wheel in the first one-way clutch 21 is disengaged from the outer ring. At this time, the second power torque provided by the second gear element (outer gear ring 13) is transmitted to the chainring 20 through the first one-way clutch 21, or through the transmission component connecting the second gear element (outer gear ring 13) and the chainring 20, thereby driving the chainring 20 to rotate. When the first power torque provided by the pedal shaft 30 drives the inner star wheel of the first one-way clutch 21 to rotate in the reverse direction, the inner star wheel in the first one-way clutch 21 is disengaged from the outer ring, and the second power torque provided by the second gear element (outer gear ring 13) is transmitted to the tooth plate 20 through the first one-way clutch 21, or through the transmission component connecting the second gear element (outer gear ring 13) and the tooth plate 20, thereby driving the tooth plate 20 to rotate. When the first motor 41 is powered off or shut down due to a fault, by setting the first one-way clutch 21, the first power torque provided by the pedal shaft 30 can be directly transmitted to the tooth plate 20 through the first one-way clutch 21, thereby improving the power transmission efficiency. Among them, when the tooth plate 20 rotates in the positive direction, the device where the drive unit 100 is located can move forward, and the reverse direction is opposite to the positive direction. In this way, when the first motor 41 is powered off or works abnormally, the pedal vehicle can still maintain normal driving, avoiding the pedal vehicle from being unable to be used and affecting the user experience.

[0058] Optional, Figure 7 A schematic diagram of the structure of a sixth driving unit provided in an embodiment of the present invention, Figure 8 A schematic diagram of the structure of a seventh driving unit provided in an embodiment of the present invention, referring to Figure 7 and Figure 8 The drive unit 100 also includes a third one-way clutch 23, which is connected to the second gear element and the first one-way clutch 21 respectively; the third one-way clutch 23 is used to transmit the second power torque provided by the second gear element to the first one-way clutch 21.

[0059] The third one-way clutch 23 includes an overrunning clutch or a toothed clutch, etc., which can be set according to actual needs. The overrunning clutch includes a ratchet overrunning clutch, a ball overrunning clutch and a wedge overrunning clutch, which can be selected according to needs. For ease of description, the following embodiment is also described by taking the third one-way clutch 23 as a roller clutch as an example.

[0060] Specifically, refer to Figure 7 , the second gear element (planet carrier 14) is reused as the inner star wheel of the third one-way clutch 23, and the outer ring of the third one-way clutch 23 is meshed with the outer ring of the first one-way clutch 21. When the first motor 41 works normally, the first motor 41 can adjust the transmission ratio between the pedal shaft 30 and the second gear element (planet carrier 14), so that the second gear element (planet carrier 14) provides the second power torque. Since the outer rings of the first one-way clutch 21 and the third one-way clutch 23 are meshed, when the inner star wheel in the third one-way clutch 23 rotates synchronously with the outer ring, and the second power torque controls the speed of the outer ring of the first one-way clutch 21 in the positive direction, which is greater than the speed of the inner star wheel of the first one-way clutch 21 driven by the first power torque in the positive direction, the inner star wheel in the first one-way clutch 21 is disengaged from the outer ring, and the second power torque provided by the second gear element (planet carrier 14) is transmitted to the tooth plate 20 through the third one-way clutch 23 and the outer ring of the first one-way clutch 21, so that the tooth plate 20 rotates normally. When the first motor 41 is powered off or shut down due to a fault, the first power torque is greater than the second power torque. At this time, the inner star wheel in the first one-way clutch 21 rotates synchronously with the outer ring, and the inner star wheel in the third one-way clutch 23 is disengaged from the outer ring. Therefore, the first power torque transmitted to the outer ring of the first one-way clutch 21 will not drive the planetary gears 12 fixedly connected to the inner star wheel of the third one-way clutch 23 to rotate, thereby improving energy utilization.

[0061] Accordingly, reference Figure 8, the second gear element (outer gear ring 13) is reused as the inner star wheel of the third one-way clutch 23, the outer ring of the third one-way clutch 23 is fixedly connected to the third transmission member 33, and the third transmission member 33 is meshed with the outer ring of the first one-way clutch 21. When the first motor 41 works normally, the first motor 41 can adjust the transmission ratio between the pedal shaft 30 and the second gear element (outer gear ring 13), so that the second gear element (outer gear ring 13) provides the second power torque. When the inner star wheel in the third one-way clutch 23 rotates synchronously with the outer ring, and the second power torque controls the speed of the outer ring of the first one-way clutch 21 in the positive direction, which is greater than the speed of the inner star wheel of the first one-way clutch 21 driven by the first power torque in the positive direction, the inner star wheel in the first one-way clutch 21 is disengaged from the outer ring, and the second power torque provided by the second gear element (outer gear ring 13) is transmitted to the tooth plate 20 through the third one-way clutch 23 and the outer ring of the first one-way clutch 21, so that the tooth plate 20 rotates normally. When the first motor 41 is powered off or shut down due to a fault, the first power torque is greater than the second power torque. At this time, the inner star wheel in the first one-way clutch 21 rotates synchronously with the outer ring, and the inner star wheel in the third one-way clutch 23 is disengaged from the outer ring. Therefore, the first power torque transmitted to the outer ring of the first one-way clutch 21 will not drive the planetary gears 12 fixedly connected to the inner star wheel of the third one-way clutch 23 to rotate, thereby improving energy utilization.

[0062] Optional, Fig. 9 A schematic diagram of the structure of an eighth driving unit provided in an embodiment of the present invention, Fig.10 A schematic diagram of the structure of a ninth driving unit provided in an embodiment of the present invention, referring to Fig. 9 and Fig.10 The drive unit 100 further includes a second one-way clutch 22, which is respectively connected to the pedal shaft 30 and the first gear element; the second one-way clutch 22 is used to transmit the first power torque along the first rotation direction provided by the pedal shaft 30 to the first gear element.

[0063] The first rotation direction is the forward direction of the drive unit 100. The second one-way clutch 22 includes an overrunning clutch or a toothed clutch, etc., which can be set according to actual needs. The overrunning clutch includes a ratchet overrunning clutch, a ball overrunning clutch and a wedge overrunning clutch, which can be selected according to needs. For ease of description, the following embodiment is also described by taking the second one-way clutch 22 as a roller clutch as an example.

[0064] Specifically, refer to Fig. 9, the pedal shaft 30 is fixedly connected to the inner star wheel of the second one-way clutch 22, and the outer ring of the second one-way clutch 22 is meshed with the first gear element (outer gear ring 13). When the first power torque provided by the pedal shaft 30 drives the first gear element (outer gear ring 13) to rotate, and the first motor 41 drives the sun gear 11 to rotate, the second gear element (planet carrier 14) can drive the chainring 20 to rotate through the second transmission member 32; when the pedal shaft 30 is reversed, the speed of the inner star wheel in the second one-way clutch 22 driven by the pedal shaft 30 is zero, which is less than the speed of the first gear element (outer gear ring 13), and the inner star wheel in the second one-way clutch 22 is disengaged from the outer ring, so as to avoid the power of the pedal shaft 30 when reversing to hinder the rotation of the first gear element (outer gear ring 13), thereby improving the user experience.

[0065] Accordingly, reference Fig.10 , the pedal shaft 30 is fixedly connected to the inner star wheel of the second one-way clutch 22, and the outer ring of the second one-way clutch 22 is fixedly connected to the first gear element (planet carrier 14). When the first power torque provided by the pedal shaft 30 drives the first gear element (planet carrier 14) to rotate, and the first motor 41 drives the sun gear 11 to rotate, the second gear element (outer gear ring 13) can drive the chainring 20 to rotate; when the pedal shaft 30 is reversed, the speed of the inner star wheel in the second one-way clutch 22 driven by the pedal shaft 30 is zero, which is less than the speed of the first gear element (planet carrier 14), and the inner star wheel in the second one-way clutch 22 is disengaged from the outer ring, so as to avoid the power of the pedal shaft 30 when reversing to hinder the rotation of the first gear element (planet carrier 14), thereby improving the user experience.

[0066] In an optional embodiment, Fig.11 A schematic diagram of the structure of a tenth driving unit provided in an embodiment of the present invention, Fig.12 This is a schematic diagram of the structure of the eleventh driving unit provided in an embodiment of the present invention, referring to Fig.11 and Fig.12 The driving unit 100 includes a first one-way clutch 21 , a second one-way clutch 22 and a third one-way clutch 23 .

[0067] Specifically, refer to Fig.11When the first motor 41 works normally, the first motor 41 drives the sun gear 11 to rotate, and the pedal shaft 30 drives the inner rings of the first one-way clutch 21 and the second one-way clutch 22 to rotate. When the second power torque provided by the second gear element (planet carrier 14) drives the outer ring of the first one-way clutch 21 to rotate in the first rotation direction through the third one-way clutch 23, which is greater than the speed of the inner star wheel in the first one-way clutch 21 in the first rotation direction, the power of the toothed disc 20 is provided by the second gear element (planet carrier 14). When the first motor 41 is powered off or abnormally shut down, the first power torque is greater than the second power torque. At this time, the inner star wheel in the first one-way clutch 21 rotates synchronously with the outer ring, and the inner star wheel in the third one-way clutch 23 is separated from the outer ring. Therefore, the first power torque transmitted to the outer ring of the first one-way clutch 21 will not drive the planetary gears 12 fixedly connected to the inner star wheel in the third one-way clutch 23 to rotate, thereby improving energy utilization. In addition, when the first motor 41 loses power or stops abnormally, the first power torque of the pedal shaft 30 is transmitted to the chainring 20 through the first one-way clutch 21. When the pedal shaft 30 reverses, the inner star wheel fixedly connected to the pedal shaft 30 in the first one-way clutch 21 is disengaged from the outer ring. Therefore, the reverse rotation of the pedal shaft 30 will not hinder the normal rotation of the chainring 20, thereby improving the user experience.

[0068] Accordingly, reference Fig.12 When the first motor 41 works normally, the first motor 41 drives the sun gear 11 to rotate, and the pedal shaft 30 drives the inner rings of the first one-way clutch 21 and the second one-way clutch 22 to rotate. When the second power torque provided by the second gear element (outer gear ring 13) drives the outer ring of the first one-way clutch 21 to rotate in the first direction of rotation through the third one-way clutch 23 and the third transmission member 33, which is greater than the speed of the inner star wheel in the first one-way clutch 21 in the first direction of rotation, the power of the toothed disc 20 is provided by the second gear element (outer gear ring 13). When the first motor 41 is powered off or abnormally shut down, the first power torque is greater than the second power torque. At this time, the inner star wheel in the first one-way clutch 21 rotates synchronously with the outer ring, and the inner star wheel in the third one-way clutch 23 is separated from the outer ring. Therefore, the first power torque transmitted to the outer ring of the first one-way clutch 21 will not drive the planetary gears 12 fixedly connected to the inner star wheel in the third one-way clutch 23 to rotate, thereby improving energy utilization. In addition, when the first motor 41 loses power or stops abnormally, the first power torque of the pedal shaft 30 is transmitted to the chainring 20 through the first one-way clutch 21. When the pedal shaft 30 reverses, the inner star wheel fixedly connected to the pedal shaft 30 in the first one-way clutch 21 is disengaged from the outer ring. Therefore, the reversal of the pedal shaft 30 will not hinder the normal rotation of the chainring 20, thereby improving the user experience.

[0069] Optional, Fig.13 A schematic diagram of the structure of a twelfth driving unit provided in an embodiment of the present invention, Fig.14 This is a schematic diagram of the structure of the thirteenth driving unit provided in the embodiment of the present invention, referring to Fig.13 and Fig.14 The driving unit 100 further includes a first reduction gear set 51, and the first motor 41 drives the sun gear 11 to rotate through the first reduction gear set 51. The first reduction gear set 51 includes a fourth one-way clutch 54, and the fourth one-way clutch 54 is fixedly connected to the sun gear 11.

[0070] Specifically, when the first reduction gear set 51 is not provided between the first motor 41 and the sun gear 11, the torque output by the first motor 41 directly drives the sun gear 11 to rotate, and the torque output by the first motor 41 is the rotation torque of the sun gear 11. After the first reduction gear set 51 is provided between the first motor 41 and the sun gear 11, the torque output by the first motor 41 is greater than the output torque of the first motor 41 after passing through the first reduction gear set 51. That is, the first reduction gear set 51 can amplify the output torque of the first motor 41. In this way, by providing the first reduction gear set 51, the output torque of the first motor 41 can be reduced, the weight of the first motor 41 can be reduced, and the lightweight of the drive unit can be achieved. In addition, the first reduction gear group 51 includes a fourth one-way clutch 54, and the fourth one-way clutch 54 is fixedly connected to the sun gear 11, so that the torque transmitted to the fourth one-way clutch 54 by the first motor 41 through the first reduction gear group 51 can only drive the sun gear 11 to rotate in a certain direction, but cannot drive the sun gear 11 to rotate in a direction opposite to the certain direction, thereby preventing the sun gear 11 from rotating in the wrong direction, causing the drive unit to work abnormally, and improving the working reliability of the drive unit 100.

[0071] It can be understood that the specific structure of the first reduction gear set 51 can be set according to actual needs. Fig.135 shows that the first reduction gear set 511 includes a planetary gear train gear set and a fourth one-way clutch 54. The planetary gear train gear set 511 includes a sun gear 61, a plurality of planetary gears 62, a second outer gear ring 63, and a sub-planet carrier 64. The sun gear 61 and each planetary gear 62 are located inside the outer ring 60, the sun gear 61 is meshed with each planetary gear 62, each planetary gear 62 is meshed with the second outer gear ring 63, and each planetary gear 62 is fixedly connected to the sub-planet carrier 64. The first motor 41 is connected to the sun gear 61, the position of the second outer gear ring 63 is fixed, that is, the second outer gear ring 63 does not rotate, and the sub-planet carrier 64 is fixedly connected to the sun gear 11 in the main epicyclic gear set 10. The transmission ratio of the planetary gear train gear set 511 is fixed, and the rotation speed of the sub-planetary carrier 64 is directly proportional to the rotation speed of the sun gear 61. That is, the greater the output torque provided by the first motor 41 to the sun gear 61, the greater the torque transmitted to the sun gear 11 through the fourth one-way clutch 54 after being amplified by the first reduction gear set 51. Fig.14 It is shown that the first reduction gear set 512 includes four reduction gears and a fourth one-way clutch 54. The four reduction gears are respectively reduction gear 65, reduction gear 66, reduction gear 67 and reduction gear 68. The first motor 41 is fixedly connected to the reduction gear 65, which is meshed with the reduction gear 66, which is fixedly connected to the reduction gear 67, which is meshed with the reduction gear 68. The reduction gear 68 is respectively fixedly connected to the fourth one-way clutch 54 and the sun gear 11, and the reduction gear 68 rotates around the pedal shaft 30. The torque output by the first motor 41 is amplified by each reduction gear and then transmitted to the sun gear 11 to reduce the output torque of the first motor 41 and save energy. Under the premise that the output torque of the first motor 41 can be reduced by the first reduction gear set 51, the specific structure of the first reduction gear set 51 can also be other, which is not specifically limited here.

[0072] Optional, Fig.15 This is a schematic structural diagram of a fourteenth driving unit provided in an embodiment of the present invention, Fig.16 This is a schematic diagram of the structure of a fifteenth driving unit provided in an embodiment of the present invention, referring to Fig.15 and Fig.16 The driving unit 100 further includes a second motor 42, which is connected to the first gear element; the second motor 42 is used to drive the first gear element to rotate.

[0073] Specifically, refer to Fig.15The second motor 42 is fixedly connected to the first transmission gear 71, the first transmission gear 71 is meshed with the second transmission gear, and the second transmission gear 72 is fixedly connected to the first gear element (outer gear ring 13). The power-assist torque provided by the second motor 42 drives the first transmission gear 71 to rotate, the first transmission gear 71 drives the second transmission gear 72 to rotate, and the second transmission gear 72 drives the first gear element (outer gear ring 13) to rotate, so as to transmit the power-assist torque to the first gear element (outer gear ring 13) through the second motor 42, so as to save the torque provided by the pedal shaft 30 to the first gear element (outer gear ring 13), thereby achieving a labor-saving effect.

[0074] Accordingly, reference Fig.16 The second motor 42 is fixedly connected to the first transmission gear 71, the first transmission gear 71 is meshed with the second transmission gear, and the second transmission gear 72 is fixedly connected to the first gear element (planet carrier 14). The power-assist torque provided by the second motor 42 drives the first transmission gear 71 to rotate, the first transmission gear 71 drives the second transmission gear 72 to rotate, and the second transmission gear 72 drives the first gear element (planet carrier 14) to rotate, so as to transmit the power-assist torque to the first gear element (planet carrier 14) through the second motor 42, so as to save the torque provided by the pedal shaft 30 to the first gear element (planet carrier 14), thereby achieving a labor-saving effect.

[0075] Optional, Fig.17 A schematic diagram of the structure of a sixteenth driving unit provided in an embodiment of the present invention, Fig.18 A schematic diagram of the structure of a seventeenth driving unit provided in an embodiment of the present invention, Fig.19 This is a schematic diagram of the structure of an eighteenth driving unit provided in an embodiment of the present invention, referring to Fig.17 and Fig.19 The drive unit 100 also includes a first reduction gear set 51, and the first motor 41 drives the sun gear 11 to rotate through the first reduction gear set 51; the first reduction gear set 51 includes a fourth one-way clutch 54, and the fourth one-way clutch 54 is fixedly connected to the sun gear 11; the second motor 42 drives the first gear element to rotate through the second reduction gear set 52; the second reduction gear set 52 includes a fifth one-way clutch 55, and the fifth one-way clutch 55 is fixedly connected to the first gear element.

[0076] The fourth one-way clutch 54 and the fifth one-way clutch 55 include an overrunning clutch or a toothed clutch, etc., and can be configured according to actual needs.

[0077] Specifically, refer to Fig.19 or Fig. 20By setting the first reduction gear set 51 between the first motor 41 and the sun gear 11, the output torque of the first motor 41 can be reduced, the weight of the first motor 41 can be reduced, and the driving unit can be lightweight. The second reduction gear set 52 is set between the second motor 42 and the first gear element (outer gear ring 13 / planet carrier 14) to reduce the output torque of the second motor 42, reduce the weight of the second motor 42, and achieve lightweight driving unit. In addition, the first reduction gear set 51 includes a fourth one-way clutch 54, and the fourth one-way clutch 54 is fixedly connected to the sun gear 11, so that the torque transmitted from the first motor 41 to the fourth one-way clutch 54 through the first reduction gear set 51 can only drive the sun gear 11 to rotate in a certain direction, but cannot drive the sun gear 11 to rotate in the direction opposite to the certain direction, so as to prevent the sun gear 11 from rotating in the wrong direction, causing the driving unit to work abnormally, and improve the working reliability of the driving unit 100. The second reduction gear group 52 includes a fifth one-way clutch 55, and the fifth one-way clutch 55 is fixedly connected to the first gear element (outer ring gear 13 / planetary carrier 14), the inner star gear of the fifth one-way clutch 55 is fixedly connected to the first gear element (outer ring gear 13 / planetary carrier 14), and the output torque provided by the second motor 42 is transmitted to the outer ring of the fifth one-way clutch 55 through other components in the second reduction gear group 52. Since the second one-way clutch 22 is provided between the pedal shaft 30 and the first gear element (outer gear ring 13 / planet carrier 14), and the outer ring of the second one-way clutch 22 is meshed with the first gear element (outer gear ring 13 / planet carrier 14), when the speed transmitted from the pedal shaft 30 to the first gear element (outer gear ring 13 / planet carrier 14) is greater than the speed transmitted from the second motor 42 to the first gear element (outer gear ring 13 / planet carrier 14), the inner star wheel in the fifth one-way clutch 55 is disengaged from the outer ring, and the inner star wheel in the second one-way clutch 22 rotates synchronously with the outer ring, and the power for the rotation of the first gear element (outer gear ring 13 / planet carrier 14) is provided by the pedal shaft 30. The driving unit 100 also includes a pedal torque sensor (not shown in the figure), which is electrically connected to the second motor 42. When the user steps on the pedal shaft 30, the pedal torque sensor can obtain the output torque of the pedal shaft 30 and transmit the output torque of the pedal shaft 30 to the second motor 42. When the outer ring speed of the second one-way clutch 22 is greater than that of the inner star wheel, it means that the assist torque provided by the second motor 42 is greater than the output torque provided by the user to the pedal shaft 30. At this time, the second motor 42 stops working; when the outer ring speed of the second one-way clutch 22 is less than that of the inner star wheel, it means that the output torque provided by the user to the pedal shaft 30 is large, and the drive unit 100 needs to be controlled to accelerate. At this time, the second motor 42 is controlled to start to provide assist torque to the first gear element (outer ring gear 13 / planetary carrier 14) to save manpower.In this way, the torque of the second motor and the pedal shaft can always be synchronously applied to the first gear element, achieving a comfortable assisted riding experience.

[0078] It can be understood that the specific structures of the first reduction gear set 51 and the second reduction gear set 52 can be set according to actual needs. Figure 17-Figure 19 , it is shown that the first reduction gear set 51 includes a planetary gear train gear set and a fourth one-way clutch 54, and the planetary gear train gear set includes a sun gear 61, a plurality of planetary gears 62, a second outer gear ring 63 and a sub-planet carrier 64. The sun gear 61 and each planetary gear 62 are both located in the ring of the second outer gear ring 63, the sun gear 61 is meshed with each planetary gear 62, each planetary gear 62 is meshed with the second outer gear ring 63, and each planetary gear 62 is fixedly connected to the sub-planet carrier 64. The first motor 41 is connected to the sun gear 61, the position of the second outer gear ring 63 is fixed, that is, the second outer gear ring 63 does not rotate, the sub-planet carrier 64 is fixedly connected to the inner planetary gear of the fourth one-way clutch 54 and the sun gear 11 in the main epicyclic gear set 10, respectively, and the outer ring of the fourth one-way clutch 54 is fixed. The transmission ratio of the planetary gear train gear set 511 is fixed, and the rotation speed of the sub-planetary carrier 64 is directly proportional to the rotation speed of the sun gear 61. That is, the greater the output torque provided by the first motor 41 to the sun gear 61, the greater the torque transmitted to the sun gear 11 after being amplified by the first reduction gear set 51. Figure 17-Figure 19 It is shown that the second reduction gear group 52 includes a first power reduction gear 73, a second power reduction gear 74, a third power reduction gear 75 and a fifth one-way clutch 55, the second motor 42 is fixedly connected to the first power reduction gear 73, the first power reduction gear 73 is meshed with the second power reduction gear 74, the second power reduction gear 74 is fixedly connected to the third power reduction gear 75, the third power reduction gear 75 is meshed with the outer ring of the fifth one-way clutch 55, and the inner star gear of the fifth one-way clutch 55 is fixedly connected to the first gear element (outer gear ring 13 or planetary carrier 14).

[0079] In another alternative embodiment, Fig. 20 A schematic diagram of the structure of a nineteenth driving unit provided in an embodiment of the present invention, Fig.21 This is a schematic diagram of the structure of the twentieth drive unit provided in an embodiment of the present invention, referring to Figure 17-Figure 21 , Fig.21 The second reduction gear set 52 and Fig.18 or Fig.19 The structure is the same as in and will not be repeated here. Fig. 20 and Fig.21The first reduction gear set 51 is similar in structure to the second reduction gear set 52, and the first reduction gear set 51 includes four reduction gears and a fourth one-way clutch 54, namely, reduction gear 65, reduction gear 66, reduction gear 67 and reduction gear 68. The first motor 41 is fixedly connected to the reduction gear 65, which is meshed with the reduction gear 66, which is fixedly connected to the reduction gear 67, which is meshed with the reduction gear 68. The reduction gear 68 is fixedly connected to the sun gear 11 and the inner star gear of the fourth one-way clutch 54, respectively. The outer ring of the fourth one-way clutch 54 is fixed, and the reduction gear 68 rotates around the pedal shaft 30. The torque output by the first motor 41 is amplified by each reduction gear and then transmitted to the sun gear 11, so as to reduce the output torque of the first motor 41 and save energy.

[0080] It should be noted that the first reduction gear group 51 and the second reduction gear group 52 are at least one-stage reduction. The above description only takes the first reduction gear group 51 and the second reduction gear group 52 as an example of a two-stage reduction device. The reduction structure of the first reduction gear 51 and the second reduction gear group 52 can also be other. On the premise that the first motor 41 can reduce the output torque through the first reduction gear group 51, and the second electrode 42 can reduce the output torque through the second reduction gear group 52, the specific structure of the first reduction gear group 51 and the second reduction gear group 52 can also be other, which is not specifically limited here.

[0081] The above description only takes the example of the second motor 42 providing assist torque to the first gear element. In other optional embodiments, the second motor 42 can also be connected to the second gear element or the chainring 20. The second motor 42 is used to drive the second gear element or the chainring 20 to rotate, so as to directly provide assist torque to the second gear element or the chainring 20, thereby indirectly saving manpower. Fig. 22 is a schematic structural diagram of a twenty-first driving unit provided in an embodiment of the present invention, Fig.23 A schematic diagram of the structure of a twenty-second driving unit provided in an embodiment of the present invention is shown in FIG. Fig. 22 and Fig.23 As shown, the second motor 42 is meshed with the second transmission gear (planet carrier 14 or outer gear ring 13) through the first transmission gear 71, so that the assist torque provided by the second motor 42 can be transmitted to the crankset 20 through the second transmission gear (planet carrier 14 or outer gear ring 13), thereby indirectly saving manpower. In another optional embodiment, Fig.24 A schematic diagram of the structure of a twenty-third driving unit provided in an embodiment of the present invention, Fig.25 This is a schematic diagram of the structure of the twenty-fourth driving unit provided in the embodiment of the present invention, referring to Fig.24 and Fig.25The first motor 41 is connected to the sun gear 11 through the fourth one-way clutch 54, and the second motor 42 is connected to the chainring 20 through the second reduction gear set 52, so as to directly provide assist torque to the chainring 20, indirectly save manpower and improve the driving comfort of the pedal vehicle.

[0082] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A driving unit for a pedal vehicle, characterized in that: include: A main epicyclic gear set (10) comprises a first gear element, a second gear element, a sun gear (11) and a plurality of planetary gears (12); the sun gear (11) is meshingly connected with the planetary gears (12); the first gear element and the sun gear (11) drive the second gear element to rotate via the planetary gears (12); the second gear element is used to drive the toothed disc (20) to rotate; A first motor (41) connected to the sun gear (11); the first motor (41) is used to drive the sun gear (11) to rotate; A pedal shaft (30) is connected to the first gear element; the pedal shaft (30) is used to drive the first gear element to rotate.

2. The drive unit according to claim 1, characterized in that: Also includes: A first one-way clutch (21) connected to the pedal shaft (30), the chainring (20) and the second gear element respectively; The first one-way clutch (21) is used to transmit a first power torque provided by the pedal shaft (30) and a second power torque provided by the second gear element to the chainring (20).

3. The drive unit according to claim 2, characterized in that: The first one-way clutch (21) comprises at least an outer ring, the outer ring is connected to the toothed disc (20) via a transmission component, and the outer ring is connected to the second gear element.

4. The drive unit according to claim 3, characterized in that: The first gear element is an outer gear ring (13) meshingly connected to the planetary gears (12), and the second gear element is a planet carrier (14) fixedly connected to each of the planetary gears (12); the planet carrier (14) is connected to the outer ring; Wherein, the central axis of the sun gear (11) is not coaxial with the pedal shaft (30).

5. The drive unit according to claim 3, characterized in that: The first gear element is a planet carrier (14) fixedly connected to each of the planetary gears (12), and the second gear element is an outer gear ring (13) meshingly connected to the planetary gears (12); the outer gear ring (13) is connected to the outer ring; Wherein, the central axis of the sun gear (11) is coaxial with the pedal shaft (30).

6. The drive unit according to claim 4 or 5, characterized in that: Also includes: The third one-way clutch (23) is connected to the second gear element and the first one-way clutch (21) respectively; the third one-way clutch (23) is used to transmit the second power torque provided by the second gear element to the first one-way clutch (21).

7. The drive unit according to any one of claims 1 to 6, characterized in that: Also includes: a second one-way clutch (22), connected to the pedal shaft (30) and the first gear element respectively; The second one-way clutch (22) is used to transmit a first power torque provided by the pedal shaft (30) along a first rotation direction to the first gear element.

8. The drive unit according to claim 1, characterized in that: Also includes: A first reduction gear set (51), wherein the first motor (41) drives the sun gear (11) to rotate via the first reduction gear set (51); the first reduction gear set (51) comprises a fourth one-way clutch (54), and the fourth one-way clutch (54) is fixedly connected to the sun gear (11).

9. The drive unit according to any one of claims 4 to 7, characterized in that: Also includes: a second motor (42) connected to the first gear element; The second motor (42) is used to drive the first gear element to rotate.

10. The drive unit according to any one of claims 4 to 7, characterized in that: Also includes: a second motor (42) connected to the second gear element; The second motor (42) is used to drive the second gear element to rotate.

11. The drive unit according to claim 9, characterized in that: Also includes: a first reduction gear set (51), wherein the first motor (41) drives the sun gear (11) to rotate via the first reduction gear set (51); the first reduction gear set (51) comprises a fourth one-way clutch (54), and the fourth one-way clutch (54) is fixedly connected to the sun gear (11); A second reduction gear set (52), wherein the second motor (42) drives the first gear element to rotate via the second reduction gear set (52); the second reduction gear set (52) comprises a fifth one-way clutch (55), and the fifth one-way clutch (55) is fixedly connected to the first gear element.

12. A pedal vehicle, characterized in that: A drive unit for a pedal vehicle comprising any one of claims 1-11.

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