Drive arrangement for a Pedelec and Pedelec

Abstract

Drive arrangement (30) for a pedelec (31), with a manual drive shaft (1) and with a first electrical machine (EM 1) and with a second electrical machine (EM 2), wherein the first electrical machine (EM 1) is arranged coaxially to the manual drive shaft (1), wherein the second electrical machine (EM 2) is arranged axially parallel to the manual drive shaft (1), wherein the manual drive shaft (1) and the first electrical machine (EM 1) are coupled to an output (3) via a first harmonic gear (WG 1), and wherein the second electrical machine (EM 2) is coupled to the manual drive shaft (1) via a multi-stage transmission gear with a constant transmission ratio.

Description

[0001] The present invention relates to a drive assembly for a pedelec with a manual drive shaft and multiple electric motors for implementing an assist function. Furthermore, the invention relates to a pedelec with the drive assembly.

[0002] For example, from the publication DE 10 2015 100 676 B3, a drive assembly for a manually driven vehicle with an electric auxiliary drive is known. The drive assembly comprises a manual drive shaft as a pedal crankshaft. The manual drive shaft and the electric auxiliary drive are coupled to the vehicle's output via a wave gear. The electric auxiliary drive allows the pedaling frequency to be varied. However, due to the superposition principle, it is not possible to implement variable torque assistance. Consequently, an additional mechanical gearshift is absolutely necessary.

[0003] Furthermore, drive arrangements for a pedelec with a manual drive shaft and two electric drives are known from the documents US 9 254 890 B2 and WO 2016 / 034 574 A1. The manual drive shaft and the electric drives are coupled to a gear of the pedelec via a planetary gear set. This allows the cadence to be varied via the first drive, and torque assistance can be provided via the second electric drive. A disadvantage, however, is that the planetary gear set for the superimposed function requires a considerable amount of space to achieve a sufficiently large gear ratio. To make matters worse, the sun gear of the planetary gear set has a minimum diameter to ensure axial passage of the pedal crankshaft or the manual drive shaft.To support the space-intensive planetary gear set, a correspondingly large electric drive is also necessary in order to be able to generate the required support torque for the rider's pedal force and, if necessary, also for an assistance torque.

[0004] DE 10 2018 217 883 A1 (post-published) relates to a Pedelec drive arrangement with a muscle-powered drive shaft in a housing, with a rotor of a first electric drive arranged axially parallel to the drive shaft and with a rotor of a second electric drive arranged coaxially to the drive shaft, wherein the rotor of the first electric drive is coupled via a first fixed gear ratio to a first planetary gear set as a superposition gear, wherein the rotor of the second electric drive is coupled via a second fixed gear ratio to the drive shaft, wherein the drive shaft is coupled to the first planetary gear set as a superposition gear, and wherein the first planetary gear set is coupled as a superposition gear to an output.

[0005] DE 10 2018 207 969 A1 (post-published) relates to a drive arrangement for a pedelec with a muscle-powered drive shaft which is coupled to an output via a strain wave gear, wherein at least a first electric drive is coupled to the strain wave gear, and wherein at least a second electric drive is coupled to the output and / or the strain wave gear via a spur gear toothing.

[0006] DE 10 2017 219 603 A1 (post-published) relates to a drive arrangement of a pedelec with a muscle-powered drive shaft and with a first electric drive, which are coupled to a common output via a first wave gear, wherein the output is coupled to a second electric drive via a second wave gear.

[0007] The present invention is based on the object of providing a drive arrangement of the type described above and a pedelec with the drive arrangement, which are of particularly compact design and require as little installation space as possible.

[0008] This object is achieved according to the invention by the subject matter having the features of patent claim 1 and 14, respectively, wherein advantageous and claimed developments result from the subclaims and the description as well as the drawings.

[0009] Accordingly, a drive arrangement for a pedelec or similar vehicle with a manual drive shaft and with a first electric machine and with a second electric machine is proposed, wherein the first electric machine is arranged coaxially to the manual drive shaft, wherein the second electric machine is arranged axially parallel to the manual drive shaft, wherein the manual drive shaft and the first electric machine are coupled to an output of the vehicle via a first harmonic gear, and wherein the second electric machine is coupled to the manual drive shaft via a multi-stage transmission gear with a constant transmission ratio.

[0010] With the drive arrangement according to the invention, a particularly compact design is achieved through the use of a strain wave gear, so that the necessary support torque on the manual drive shaft can also be applied by a compact electric motor. Because the second electric motor is connected to the manual drive shaft via a multi-stage transmission with a constant gear ratio, variable torque assistance for the driver is also possible. This eliminates the need for additional mechanical gearshift. For example, at speeds above a predetermined assistance speed of 25 km / h, the second electric machine can generate energy for the first electric motor, so that overall battery-neutral driving operation without electrical assistance from an energy storage device is possible.

[0011] The wave gear, which is also referred to as a stress wave gear or sliding wedge gear, usually has a wave generator, an inner bushing and an outer bushing. The outer bushing has internal teeth and the inner bushing has external teeth, which engage with each other over two circumferential sections, for example. The cross-section of the outer bushing is circular. The inner bushing is designed to be deformable. The wave generator, which can have an elongated or elliptical shape, presses the inner bushing with its external teeth into the internal teeth of the outer bushing over two circumferential sections, for example. The number of teeth of the external teeth of the inner bushing and the internal teeth of the outer bush are different. If, for example, the outer bushing is used as the output element, power can be introduced into the wave gear on the drive side both via the inner bushing and at the wave generator.In this way, a superposition function is realized by the wave gear.

[0012] The connection of the first strain wave gear can be achieved by connecting a pedal crankshaft as the manual drive shaft of the pedelec to a deformable inner bushing of the strain wave gear. A rotor of the electric motor can be connected to a shaft generator of the transmission, while an outer bushing of the strain wave gear can be connected to a chain or belt pulley as the output of the pedelec. Due to the strain wave gear with a high gear ratio, the first electric motor can adequately support the rider's pedal power with additional assistance torque from the second electric motor, if necessary. In addition, the strain wave gear enables a space-saving design. Due to the high gear ratio of the strain wave gear, only a low torque needs to be available at the shaft generator, so the first electric motor must be dimensioned accordingly small.

[0013] Within the scope of a first embodiment of the proposed drive arrangement, it can be provided that a first planetary gear set as the first stage and a first spur gear stage as the second stage of the transmission gear are provided as a multi-stage transmission. Accordingly, the constant pre-transmission consists of a planetary gear set and a spur gear stage. The planetary gear set can be driven by the sun gear. The output of the planetary gear set can be formed by the planet gear carrier, and the ring gear of the planetary gear set can be fixed to the housing. This achieves the highest possible transmission ratio for the second electric machine. In the spur gear stage, at least one additional intermediate gear or a chain can be provided between the spur gears.This offers the advantage that the diameters of the spur gears can be selected to be smaller, thus requiring the smallest possible housing dimensions for the drive arrangement according to the invention. The spur gears of the spur gear stage are thus smaller in diameter than the specified diameter of the first electrical machine and the strain wave gear.

[0014] The fact that the second electric motor with the planetary gear set is arranged axially parallel to the crankshaft results in improved efficiency. A particular advantage is that the sun gear can have a small diameter, since the crankshaft does not have to pass through it. This allows for a large stationary gear ratio of, for example, minus 5 or similar.

[0015] As part of a possible further development, the planetary gear set connected to the second electric motor can be designed with a stepped planetary gear. By using a stepped planetary gear set, a larger gear ratio can be achieved with the planetary gear set for the second electric motor without increasing the dimensions of the planetary gear set.

[0016] A further possible development of the present invention can provide for two planetary gear sets connected axially in series instead of one planetary gear set. In this way, a larger pre-transmission ratio can be achieved for the second electric machine. The connection of the second planetary gear set can be analogous to the connection of the first planetary gear set. This results in the advantage that the diameter of both planetary gear sets can be selected to be correspondingly smaller, since such a high stationary transmission ratio is not required. The diameter of the electric machine can also be made smaller, since the second electric machine requires less torque.

[0017] A further embodiment of the drive assembly according to the invention can provide a multi-stage transmission gear comprising a second harmonic drive as the first stage and the first spur gear stage as the second stage of the transmission gear. The harmonic drive can be arranged coaxially to a fixed axis, thus creating an axis-parallel arrangement with respect to the pedal crankshaft. The second harmonic drive is connected to the pedal crankshaft via the spur gear stage. This results in a particularly cost-effective solution because the components of the first harmonic drive, including the electric motor, can largely be reused to create the second electric motor and the second harmonic drive.

[0018] Within the scope of another possible embodiment of the drive arrangement according to the invention, it can be provided that a second spur gear stage is provided as the first stage and a first spur gear stage is provided as the second stage of the multi-stage transmission gear. Thus, a multi-stage spur gear is used as a constant pre-transmission ratio for the second electric machine. This results in the advantage of a particularly simple design as a multi-stage spur gear transmission. Furthermore, the lubricating oil supply is particularly simple compared to planetary gears.

[0019] Finally, as a next embodiment of the proposed drive arrangement, a third spur gear stage can be provided as a multi-stage transmission gear, a third spur gear stage as the first stage, a second spur gear stage as the second stage, and a first spur gear stage as the third stage of the transmission gear. This uses a three-stage spur gear as a constant pre-transmission ratio for the second electric machine. With the three spur gear stages connected in series, a desired overall transmission ratio for the second electric machine to the pedal crankshaft of, for example, i=40 or the like can be easily achieved, for example by each individual spur gear stage having a transmission ratio of, for example, i=3.42. Using an intermediate gear has no influence on the corresponding spur gear stage. Overall, this results in a particularly structurally simple design and a particularly simple lubricating oil supply.

[0020] A further subordinate aspect of the invention is based on providing a pedelec with the drive arrangement described above, which results in the advantages already described and further advantages.

[0021] The present invention is further explained below with reference to the drawings. They show: Fig. 1 a schematic view of a first embodiment of a drive arrangement according to the invention with a planetary gear set and a spur gear stage as a multi-stage transmission gear; Fig. 2 a schematic view of a variant of the first embodiment with a chain in the spur gear stage; Fig. 3 a schematic view of a further variant of the first embodiment with a stepped planet in the planetary gear set; Fig. 4 a schematic view of a next variant in the first embodiment with two planetary gear sets connected in series as the first stage of the transmission gear; Fig. 5 a schematic view of another variant according to Fig. 4 without intermediate gear in the spur gear stage as the second stage of the transmission gear; Fig. 6 a schematic view of a second embodiment of the drive arrangement with a second harmonic gear and a spur gear stage as a multi-stage transmission gear; Fig. 7 is a schematic view of a variant of the second embodiment with an intermediate gear in the spur gear stage; Fig. 8 is a schematic view of a further variant of the second embodiment with a chain in the spur gear stage; Fig. 9 a schematic view of a third embodiment of the drive arrangement with a first spur gear stage and a second spur gear stage as a multi-stage transmission gear; Fig. 10 a schematic view of a fourth embodiment of the drive arrangement with three spur gear stages as a multi-stage transmission; and Fig. 11 a schematic view of a pedelec with the drive arrangement according to the invention.

[0022] In the Fig. 1 to 10 show various embodiments of a drive arrangement (30) according to the invention of a pedelec (31) or similar vehicle and variants thereof merely by way of example. Fig. 11 a Pedelec 31 with the drive arrangement 30 according to the invention is shown schematically.

[0023] The drive assembly 30 comprises a manual drive shaft 1 as a pedal crankshaft and a first electric machine EM 1 and a second electric machine EM 2, which are arranged in a common housing 2. Both the first electric machine EM 1 and the second electric machine EM 2 can be operated as a generator and also as a motor.

[0024] The first electric machine EM 1 is arranged coaxially with the manual drive shaft 1, while the second electric machine EM 2 is arranged axially parallel to the manual drive shaft 1. A left pedal 27 and a right pedal 28 are provided at the ends of the pedal crankshaft 1.

[0025] The first electric motor EM 1 and the manual drive shaft 1 are coupled via a first harmonic drive WG 1 to an output 3 of the pedelec 31, for example, as a sprocket or belt pulley for driving a rear wheel, whereby a hub output can also be provided. The second electric motor EM 2 is coupled to the manual drive shaft 1 via a multi-stage transmission gear with a constant ratio.

[0026] Regardless of the respective embodiments and their variants, it is provided that the pedal crankshaft, as a manual drive shaft 1, extends axially through the housing 2 and is connected to a deformable inner bushing 4 of the first wave gear WG 1, wherein the inner bushing 4 has external teeth. Furthermore, a rotor 5 of the first electric machine EM 1 is connected to a wave generator 6 of the first wave gear WG 1, wherein the wave generator 6 has a ball bearing. An outer bushing 7 of the first wave gear WG 1 is connected to the output 3 of the pedelec 31.

[0027] According to Fig. 1 shows a first exemplary embodiment of the drive arrangement 30, in which a first planetary gear set PS 1 as the first stage of the transmission gear and a first spur gear stage ST 1 as the second stage of the transmission gear are provided as a multi-stage transmission gear. In this case, a rotor 8 of the second electric machine EM 2 is connected to a sun gear 9 of the first planetary gear set PS 1. A ring gear 10 of the first planetary gear set PS 1 is held fixed to the housing by being connected to the housing 2. A planet gear carrier 11 of the first planetary gear set PS 1 is connected to a first spur gear 12 of the first spur gear stage ST 1, wherein the first spur gear 12 is directly or, as in Fig. 1, is coupled via an intermediate gear 13 to a second spur gear 14 of the first spur gear stage ST 1. The second spur gear 14 of the first spur gear stage ST 1 is rotationally fixedly connected to the manual drive shaft 1 or the pedal crankshaft.

[0028] Fig. Figure 2 shows a variant of the first embodiment, in which a chain 15 is provided between the first spur gear 12 and the second spur gear 14 of the first spur gear stage ST 1 instead of the intermediate gear 13. The use of an intermediate gear 13 or a chain 15 offers advantages over direct engagement with regard to the required external dimensions, since the required diameters can be smaller with indirect coupling.

[0029] In Fig. 3 shows a further variant of the first embodiment, in which the first planetary gear set PS 1 is designed as the first stage of the transmission gear with a stepped planet 29.

[0030] Fig. 4 shows a further variant of the first exemplary embodiment, in which, instead of a planetary gear set 2, planetary gear sets PS 1 and PS 2 connected in series are provided. Accordingly, the first stage of the transmission gearing is the first planetary gear set PS 1 and the second planetary gear set PS 2, and the spur gear stage ST 1 is provided as the second stage of the transmission gearing. Provision is made here for the rotor 8 of the second electric machine EM 2 to be connected to the sun gear 9 of the first planetary gear set PS 1, the ring gear 10 of the first planetary gear set PS 1 being fixed to the housing, and the planet gear carrier 11 of the first planetary gear set PS 1 to be connected to a sun gear 22 of the second planetary gear set PS 2.A ring gear 16 of the second planetary gear set PS 2 is fixed to the housing, while a planet gear carrier 17 of the second planetary gear set PS2 is connected to the first spur gear 12 of the first spur gear stage ST 1, wherein the first spur gear 12 is directly, as in . Fig. 5, or, as shown in Fig. 4, is indirectly coupled via the intermediate gear 13 to the second spur gear 14 of the first spur gear stage ST 1. The second spur gear 14 of the first spur gear stage ST 1 is rotationally fixedly connected to the manual drive shaft 1.

[0031] In Fig. 6 shows a second embodiment of the drive arrangement 30 according to the invention, in which a second harmonic drive WG 2 is provided as the first stage of the multi-stage transmission gear and the first spur gear stage ST 1 is provided as the second stage of the transmission gear. For this purpose, the rotor 8 of the second electrical machine EM 2 is connected to a wave generator 18 of the second harmonic drive WG 2. A deformable inner bushing 19 of the second harmonic drive WG 2 is connected to a rotationally fixed axle 20, while an outer bushing 21 of the second harmonic drive WG 2 is connected to the first spur gear 12 of the first spur gear stage ST 1. The first spur gear 12 is in Fig. 6 is directly coupled to the second spur gear 14 of the first spur gear stage ST 1, wherein the second spur gear 14 of the first spur gear stage ST 1 is connected in a rotationally fixed manner to the pedal crankshaft or the manual drive shaft 1. In Fig. 7, an indirect coupling of the first spur gear 12 and the second spur gear 14 of the first spur gear stage ST 1 takes place via the intermediate gear 13. In Fig. 8 also represents an indirect coupling, with the chain 15 being provided as the coupling link.

[0032] In Fig. 9 shows a third exemplary embodiment of the drive arrangement 30, in which a second spur gear stage ST 2 as the first stage of the transmission gear and the first spur gear stage ST 1 as the second stage of the transmission gear are provided as a multi-stage transmission gear. For this purpose, the rotor 8 of the second electric machine EM 2 is connected to a first spur gear 23 of the second spur gear stage ST 2, wherein the first spur gear 23 meshes with a second spur gear 24 of the second spur gear stage ST 2. The second spur gear 24 of the second spur gear stage ST 2 is connected in a rotationally fixed manner to the first spur gear 12 of the first spur gear stage ST 1, wherein the first spur gear 12 of the first spur gear stage ST 1 is indirectly coupled via the intermediate gear 13 to the second spur gear 14 of the first spur gear stage ST 1. The second spur gear 14 is again connected in a rotationally fixed manner to the manual drive shaft 1.However, a direct coupling or an indirect coupling, for example via a chain 15 or the like, can also be provided.

[0033] In Fig.10 shows a fourth exemplary embodiment of the drive arrangement 30, in which a third spur gear stage ST 3 is provided as the first stage of the transmission, the second spur gear stage ST 2 as the second stage of the transmission, and the first spur gear stage ST 1 as the third stage of the transmission operation as a multi-stage transmission. For this purpose, the rotor 8 of the second electrical machine EM 2 is connected to a first spur gear 25 of the third spur gear stage ST 3, wherein the first spur gear 25 of the third spur gear stage ST 3 engages with a second spur gear 26 of the third spur gear stage ST 3, wherein the second spur gear 26 of the third spur gear stage ST 3 is connected in a rotationally fixed manner to the first spur gear 23 of the second spur gear stage ST 2, which engages with the second spur gear 24 of the second spur gear stage ST 2.The second spur gear 24 of the second spur gear stage ST 2 is rotationally fixedly connected to the first spur gear 12 of the first spur gear stage ST 1, wherein the first spur gear 12 is indirectly coupled via the intermediate gear 13 to the second spur gear 14 of the first spur gear stage ST 1. The second spur gear 14 of the first spur gear stage ST 1 is again rotationally fixedly connected to the pedal crankshaft or the manual drive shaft 1. Reference symbol 1 manual drive shaft or pedal crank shaft 2 housings 3 Downforce 4 deformable inner bushing of the first wave gear 5 Rotor of the first electric machine 6 Wave generator of the first wave gear 7 Outer bushing of the first wave gear 8 Rotor of the second electric machine 9 Sun gear of the first planetary gear set 10 Ring gear of the first planetary gear set 11 Planet gear carrier of the first planetary gear set 12 first spur gear of the first spur gear stage 13 Intermediate gear 14 second spur gear of the first spur gear stage 15 Chain or belt 16 Ring gear of the second planetary gear set 17 Planet gear carrier of the second planetary gear set 18 Shaft generator of the second wave gear 19 deformable inner bushing of the second wave gear 20 non-rotatable axle 21 Outer bushing of the second wave gear 22 Sun gear of the second planetary gear set 23 first spur gear of the second spur gear stage 24 second spur gear of the second spur gear stage 25 first spur gear of the third spur gear stage 26 second spur gear of the third spur gear stage 27 left pedal 28 right pedal 29 Step Planet 30 Drive arrangement 31 Pedelec EM 1 first electric machine EM 2 second electric machine WG 1 first wave gear WG 2 second wave gear PS 1 first planetary gear set PS2 second planetary gear set ST 1 first spur gear stage ST2 second spur gear stage ST 3 third spur gear stage

Claims

[1] Drive arrangement (30) for a pedelec (31), with a manual drive shaft (1) and with a first electrical machine (EM 1) and with a second electrical machine (EM 2), wherein the first electrical machine (EM 1) is arranged coaxially to the manual drive shaft (1), wherein the second electrical machine (EM 2) is arranged axially parallel to the manual drive shaft (1), wherein the manual drive shaft (1) and the first electrical machine (EM 1) are coupled to an output (3) via a first harmonic gear (WG 1), and wherein the second electrical machine (EM 2) is coupled to the manual drive shaft (1) via a multi-stage transmission gear with a constant transmission ratio. [2] Drive arrangement (30) according to claim 1, characterized bythat a pedal crankshaft as a manual drive shaft (1) is connected to a deformable inner bush (4) of the first wave gear (WG 1), that a rotor (5) of the first electrical machine (EM 1) is connected to a wave generator (6) of the first wave gear (WG 1) and that an outer bush (7) of the wave gear (WG 1) is connected to the output (3) of the pedelec (31). [3] Drive arrangement (30) according to claim 1 or 2, characterized by that a first planetary gear set (PS 1) is provided as the first stage of the transmission gear and a first spur gear stage (ST 1) is provided as the second stage of the transmission gear. [4] Drive arrangement (30) according to claim 3, characterized bythat a rotor (8) of the second electrical machine (EM 2) is connected to a sun gear (9) of the first planetary gear set (PS 1), that a ring gear (10) of the first planetary gear set (PS 1) is fixed to the housing, and that a planet gear carrier (11) of the first planetary gear set (PS 1) is connected to a first spur gear (12) of the first spur gear stage (ST 1), wherein the first spur gear (12) is coupled directly or indirectly via an intermediate gear (13) or a chain (15) to a second spur gear (14) of the first spur gear stage (ST 1), and wherein the second spur gear (14) of the first spur gear stage (ST 1) is connected in a rotationally fixed manner to the manual drive shaft (1). [5] Drive arrangement (30) according to claim 3 or 4, characterized by that the first planetary gear set (PS 1) is designed with a stepped planet (29). [6] Drive arrangement (30) according to one of claims 3 or 5, characterized bythat the first planetary gear set (PS 1) and a second downstream planetary gear set (PS2) are provided as the first stage of the transmission gear. [7] Drive arrangement (30) according to claim 6, characterized bythat the rotor (8) of the second electric machine (EM 2) is connected to the sun gear (9) of the first planetary gear set (PS 1), that the ring gear (10) of the first planetary gear set (PS 1) is fixed to the housing, that the planet gear carrier (11) of the first planetary gear set (PS 1) is connected to a sun gear (22) of the second planetary gear set (PS 2), that a ring gear (16) of the second planetary gear set (PS 2) is fixed to the housing, that a planet gear carrier (17) of the second planetary gear set (PS 2) is connected to the first spur gear (12) of the first spur gear stage (ST 1), wherein the first spur gear (12) is coupled directly or indirectly via an intermediate gear (13) or a chain (15) to the second spur gear (14) of the first spur gear stage (ST 1), and wherein the second spur gear (14) of the first spur gear stage (ST 1) is rotationally fixed connected to the manual drive shaft (1). [8] Drive arrangement (30) according to claim 1 or 2, characterized bythat a second harmonic gear (WG 2) is provided as the first stage and a first spur gear stage (ST 1) is provided as the second stage as a multi-stage transmission gear. [9] Drive arrangement (30) according to claim 8, characterized by in that the rotor (8) of the second electrical machine (EM 2) is connected to a wave generator (18) of the second harmonic gear (WG 2), in that a deformable inner bushing (19) of the second harmonic gear (WG 2) is connected to a rotationally fixed axle (20), and in that an outer bushing (21) of the second harmonic gear (WG 2) is connected to a first spur gear (12) of the first spur gear stage (ST 1), wherein the first spur gear (12) is coupled directly or indirectly via an intermediate gear (13) or a chain (15) to a second spur gear (14) of the first spur gear stage (ST 1), and wherein the second spur gear (14) of the first spur gear stage (ST 1) is rotationally fixedly connected to the manual drive shaft (1). [10] Drive arrangement (30) according to claim 1 or 2, characterized by that as a multi-stage transmission gear, a second spur gear stage (ST 2) is provided as the first stage and a first spur gear stage (ST 1) is provided as the second stage. [11] Drive arrangement (30) according to claim 10, characterized by in that the rotor (8) of the second electrical machine (EM 2) is connected to a first spur gear (23) of the second spur gear stage (ST 2), which is in engagement with a second spur gear (24) of the second spur gear stage (ST 2), in that the second spur gear (24) of the second spur gear stage (ST 2) is connected in a rotationally fixed manner to a first spur gear (12) of the first spur gear stage (ST 1), wherein the first spur gear (12) of the first spur gear stage (ST 1) is coupled directly or indirectly via an intermediate gear (13) or a chain (15) to a second spur gear (14) of the first spur gear stage (ST 1), and wherein the second spur gear (14) of the first spur gear stage (ST 1) is connected in a rotationally fixed manner to the manual drive shaft (1). [12] Drive arrangement (30) according to claim 1 or 2, characterized by that, as a multi-stage transmission gear, a third spur gear stage (ST 3) is provided as the first stage of the transmission gear and a second spur gear stage (ST 2) is provided as the second stage of the transmission gear and a first spur gear stage (ST 1) is provided as the third stage of the transmission gear. [13] Drive arrangement (30) according to claim 12, characterized bythat the rotor (8) of the second electrical machine (EM 2) is connected to a first spur gear (25) of the third spur gear stage (ST 3), which is in engagement with a second spur gear (26) of the third spur gear stage (ST 3), that the second spur gear (26) of the third spur gear stage (ST 3) is connected in a rotationally fixed manner to a first spur gear (23) of the second spur gear stage (ST 2), which is in engagement with a second spur gear (24) of the second spur gear stage (ST 2), that the second spur gear (24) of the second spur gear stage (ST 2) is connected in a rotationally fixed manner to a first spur gear (12) of the first spur gear stage (ST 1), wherein the first spur gear (12) is coupled directly or indirectly via an intermediate gear (13) or a chain (15) to a second spur gear (14) of the first spur gear stage (ST 1) is non-rotatably connected to the manual drive shaft (1). [14] Pedelec (31) with a drive arrangement (30) according to one of the preceding claims.

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