Electric drive axle and commercial vehicle

Abstract

The invention relates to the technical field of vehicles, and particularly discloses an electric drive axle and a commercial vehicle. The electric drive axle is provided with a first planet row which is connected with a first driving gear and a second driving gear on an input shaft, and a first driven gear and a second driven gear are selectively connected with a second planet row through a gear shifting assembly; power is output through the second planet row, so that transmission ratios of different gears are set more reasonably, the planet rows and gears are prevented from being arranged on a certain shaft in a concentrated mode, parts are distributed more evenly, and the situation that the center of gravity shifts is greatly relieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to an electric drive axle and a commercial vehicle. BACKGROUND

[0002] The electric drive axle is usually provided with multiple gears to meet the requirements of high rotation speed and large torque of the vehicle. In the related art, the transmission ratios of some gears are close to each other or there is a problem of too large transmission ratio interval between adjacent gears. Moreover, with the increase of the number of gears, the number of parts increases, and the motor and gears are concentrated on one side of the vehicle, resulting in the deviation of the center of gravity. SUMMARY

[0003] The purpose of the present application is to provide an electric drive axle and a commercial vehicle, so that the transmission ratios of different gears are more reasonable, and the parts are more evenly distributed, thereby alleviating the deviation of the center of gravity.

[0004] The present application provides an electric drive axle, comprising a housing, a drive motor, a transmission and a differential are arranged in the housing, the transmission comprises:

[0005] an input shaft, a first driving gear and a second driving gear are connected on the input shaft, the drive motor is in transmission connection with the first driving gear and the second driving gear through a first planetary gear set;

[0006] an output shaft, a first driven gear, a second driven gear and a second planetary gear set are arranged on the output shaft, the first driven gear is in transmission connection with the first driving gear, the second driven gear is in transmission connection with the second driving gear, the first driven gear and the second driven gear are both sleeved on the output shaft, and an output member of the second planetary gear set is connected with the differential;

[0007] a gear shifting assembly for selectively connecting the first driven gear and the second driven gear with the second planetary gear set.

[0008] As a preferred technical solution of the electric drive axle, the first planetary gear set comprises a first sun gear, a first planet gear, a first planet carrier and a first ring gear, the first ring gear is fixed on the housing, the input shaft is fixedly connected with a motor shaft of the drive motor, the first sun gear and the second driving gear are both fixedly sleeved on the input shaft, and the first driving gear is sleeved on the input shaft and fixedly connected with the first planet carrier.

[0009] As a preferred technical solution of the electric drive axle, the first planetary gear set comprises a first sun gear, a first planet gear, a first planet carrier and a first ring gear, the first ring gear is fixed on the housing, the first sun gear is fixedly sleeved on the motor shaft of the drive motor, the input shaft is fixedly connected with the first planet carrier, and the first driving gear and the second driving gear are both fixedly sleeved on the input shaft.

[0010] As a preferred technical solution of the electric drive axle, the second planetary gear set comprises a second sun gear, a second planet gear, a second planet carrier and a second ring gear, the second ring gear is fixed on the housing, the output member of the second planetary gear set is the second planet carrier, the second sun gear is fixedly sleeved on the output shaft, one side of the first driven gear is fixedly provided with a one-gear engaging tooth, the other side of the first driven gear is fixedly provided with a two-gear engaging tooth, the second planet carrier is fixedly provided with a planet carrier engaging tooth, the second driven gear is fixedly provided with a three-gear engaging tooth, the output shaft is further fixedly sleeved with a zero-gear engaging tooth, the zero-gear engaging tooth is located between the first driven gear and the second driven gear, and the gear shifting assembly comprises a first sliding sleeve and a second sliding sleeve.

[0011] As a preferred technical solution of the electric drive axle, the output shaft is a hollow shaft, and the half shaft passes through the output shaft and is connected with the differential.

[0012] As a preferred technical solution of the electric drive axle, the transmission ratio of the first driving gear and the first driven gear is greater than the transmission ratio of the second driving gear and the second driven gear.

[0013] As a preferred technical solution of the electric drive axle, the output shaft is a hollow shaft, and the half shaft passes through the output shaft and is connected with the differential.

[0014] As a preferred technical solution of the electric drive axle, the input shaft is provided in two, the two input shafts are arranged in parallel on both sides of the output shaft, and the drive motor is provided in two, the two drive motors are respectively connected in transmission with the first driving gear and the second driving gear on the two input shafts.

[0015] As the preferred technical scheme of the electric drive axle, a power take-off shaft is further arranged, a power take-off gear is sleeved on the power take-off shaft, the power take-off gear is engaged with the first driven gear or the second driven gear, and the power take-off shaft is used to drive a power take-off device.

[0016] The application provides a commercial vehicle comprising the electric drive axle according to any one of the above schemes.

[0017] The application has the following beneficial effects:

[0018] The application provides an electric drive axle, a first driving gear and a second driving gear connected to an input shaft of a first planetary gear train are arranged, a first driven gear and a second driven gear are selectively connected to a second planetary gear train through a gear shifting assembly, and power is output through the second planetary gear train, so that the transmission ratio of different gears is more reasonable, the planetary gear train and the gear are not concentrated on a certain shaft, the components are more evenly distributed, and the center of gravity is greatly relieved from deviation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is one of the principle diagrams of the electric drive axle in the embodiment of the application;

[0020] Figure 2 It is Figure 1 the principle diagram of the first planetary gear train;

[0021] Figure 3 It is Figure 1 the principle diagram of the second planetary gear train;

[0022] Figure 4 It is the second principle diagram of the electric drive axle in the embodiment of the application;

[0023] Figure 5 It is the third principle diagram of the electric drive axle in the embodiment of the application;

[0024] Figure 6 It is the fourth principle diagram of the electric drive axle in the embodiment of the application;

[0025] Figure 7 It is the fifth principle diagram of the electric drive axle in the embodiment of the application;

[0026] Figure 8 It is the sixth principle diagram of the electric drive axle in the embodiment of the application;

[0027] Figure 9 It is the seventh principle diagram of the electric drive axle in the embodiment of the application;

[0028] Figure 10 It is the eighth principle diagram of the electric drive axle in the embodiment of the application;

[0029] Figure 11Fig. 9 is a schematic diagram of the ninth embodiment of the electric drive axle of the present application.

[0030] Fig. 1 is a schematic diagram of the first embodiment of the electric drive axle of the present application.

[0031] 10, drive motor; 20, housing; 30, differential; 40, half shaft; 50, wheel;

[0032] 1, input shaft; 11, first planetary gear set; 111, first sun gear; 112, first planet gear; 113, first planet carrier; 114, first ring gear; 12, first driving gear; 13, second driving gear;

[0033] 2, output shaft; 21, second planetary gear set; 211, second sun gear; 212, second planet gear; 213, second planet carrier; 214, second ring gear; 22, first driven gear; 221, first-gear engaging tooth; 222, second-gear engaging tooth; 23, second driven gear; 231, third-gear engaging tooth; 24, planet carrier engaging tooth; 25, zero-gear engaging tooth;

[0034] 31, first sliding sleeve; 32, second sliding sleeve;

[0035] 4, intermediate shaft; 41, first intermediate gear; 42, second intermediate gear;

[0036] 5, power take-off shaft; 51, power take-off gear. DETAILED DESCRIPTION

[0037] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "over" and "on" of the first feature to the second feature include the first feature above and obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The "below", "under" and "under" of the first feature to the second feature include the first feature below and obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0039] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation on the present application.

[0041] As Figures 1-11As shown, the application provides an electric drive axle, which comprises a housing 20, a drive motor 10, a transmission and a differential 30 arranged in the housing 20. The housing 20 is a combination of an axle housing, a motor housing and a transmission housing, the differential 30 is connected with two wheels 50 through two half shafts 40 respectively, and the drive motor 10 drives the differential 30 through the transmission. The transmission comprises an input shaft 1, an output shaft 2 and a shift assembly. The input shaft 1 is connected with a first driving gear 12 and a second driving gear 13, and the drive motor 10 is in transmission connection with the first driving gear 12 and the second driving gear 13 through a first planetary gear set 11. The output shaft 2 is provided with a first driven gear 22, a second driven gear 23 and a second planetary gear set 21. The first driven gear 22 is in transmission connection with the first driving gear 12, and the second driven gear 23 is in transmission connection with the second driving gear 13. The first driven gear 22 and the second driven gear 23 are both loose on the output shaft 2, and the output member of the second planetary gear set 21 is connected with the differential 30. The shift assembly is used for selectively connecting the first driven gear 22 and the second driven gear 23 with the second planetary gear set 21. There are two power transmission paths of the drive motor 10, when the shift assembly engages the first driven gear 22 with the second planetary gear set 21, the power of the drive motor 10 is output to the differential 30 after passing through the first planetary gear set 11, the first driving gear 12, the first driven gear 22 and the second planetary gear set 21; when the shift assembly engages the second driven gear 23 with the second planetary gear set 21, the power of the drive motor 10 is output to the differential 30 after passing through the first planetary gear set 11, the second driving gear 13, the second driven gear 23 and the second planetary gear set 21. By changing the connection relationship between the first driven gear 22, the second driven gear 23 and the second planetary gear set 21 through the shift assembly, the power of the first driven gear 22 or the second driven gear 23 is output to the differential 30 after being reduced by the second planetary gear set 21, or is directly output to the differential 30 through the output member of the second planetary gear set 21, so that different transmission ratios are obtained, the transmission ratios of different gears are more reasonable, and the planetary gear set and the gears are not concentrated on a certain shaft, the distribution of parts is more uniform, and the situation of gravity center deviation is greatly alleviated.

[0042] Further, the first planetary gear set 11 comprises a first sun gear 111, a first planet gear 112, a first planet carrier 113 and a first ring gear 114, and the first ring gear 114 is fixed on the housing 20. There are two arrangement modes of the input shaft 1, the first arrangement mode of the input shaft 1 is as follows Figures 1-4 and Figures 7-10As shown, the input shaft 1 is fixedly connected with the motor shaft of the driving motor 10, the first sun gear 111 and the second driving gear 13 are fixedly sleeved on the input shaft 1, and the first driving gear 12 is sleeved on the input shaft 1 and fixedly connected with the first carrier 113. In this arrangement, the rotation speed of the first driving gear 12 on the input shaft 1 is the same as that of the first carrier 113, that is, the power of the driving motor 10 is transmitted to the first driving gear 12 after being decelerated by the first planetary gear set 11; the rotation speed of the second driving gear 13 is the rotation speed of the driving motor 10. The second arrangement of the input shaft 1 will be described below with reference to Figures 5-6 and Figure 11 As shown, the first sun gear 111 is fixedly sleeved on the motor shaft of the driving motor 10, the input shaft 1 is fixedly connected with the first carrier 113, and the first driving gear 12 and the second driving gear 13 are fixedly sleeved on the input shaft 1. In this arrangement, the power of the driving motor 10 is transmitted to the input shaft 1 after being decelerated by the first planetary gear set 11, so that the rotation speeds of the first driving gear 12 and the second driving gear 13 are the same. In this embodiment, the first ring gear 114 of the first planetary gear set 11 is a fixed part, and the first carrier 113 is an output part; in other embodiments, the first carrier 113 can be a fixed part, and the first ring gear 114 can be an output part; the difference between the two is that the deceleration ratios of the first planetary gear set 11 are different, and a person skilled in the art can select according to the actual engineering, which is not specifically limited here.

[0043] Further, the second planetary gear set 21 comprises a second sun gear 211, a second planetary gear 212, a second carrier 213 and a second ring gear 214. The second ring gear 214 is fixed on the housing 20, and the output of the second planetary gear set 21 is the second carrier 213. In other embodiments, the second carrier 213 can be fixed, and the second ring gear 214 can be the output, the difference between the two is that the reduction ratio of the output of the second planetary gear set 21 is different, and the person skilled in the art can choose according to the actual engineering, which is not specifically limited here. The second sun gear 211 is fixedly sleeved on the output shaft 2, and the first driven gear 22 is fixedly provided with a one-stop engagement tooth 221 and a two-stop engagement tooth 222 on both sides thereof, wherein the one-stop engagement tooth 221 is arranged on the side of the first driven gear 22 away from the second planetary gear set 21, and the two-stop engagement tooth is arranged on the side of the first driven gear 22 facing the second planetary gear set 21. The second carrier 213 is fixedly provided with a carrier engagement tooth 24, and the carrier engagement tooth 24 is arranged on the side of the second carrier 213 facing the first driven gear 22. The second driven gear 23 is fixedly provided with a three-stop engagement tooth 231, and the three-stop engagement tooth 231 is arranged on the side of the second driven gear 23 facing the first driven gear 22. The output shaft 2 is also fixedly sleeved with a zero-stop engagement tooth 25, and the zero-stop engagement tooth 25 is located between the first driven gear 22 and the second driven gear 23. The shift assembly comprises a first sliding sleeve 31 and a second sliding sleeve 32, and the first sliding sleeve 31 and the second sliding sleeve 32 are respectively located on both sides of the first driven gear 22. The first sliding sleeve 31 selectively engages the zero-stop engagement tooth 25 with the one-stop engagement tooth 221 or the three-stop engagement tooth 231, and the second sliding sleeve 32 is used to engage or disconnect the two-stop engagement tooth 222 with the carrier engagement tooth 24.

[0044] Specifically, for the first arrangement of the input shaft 1, as Figure 1As shown, in the neutral state, the first sliding sleeve 31 slides to the position of the zero-gear engagement tooth 25, and the second sliding sleeve 32 slides to the position of the carrier engagement tooth 24, at this time, the power of the first driven gear 22 and the second driven gear 23 cannot be transmitted to the second planetary gear set 21, thereby cutting off the power transmission between the driving motor 10 and the differential 30. When the first gear is engaged, the first sliding sleeve 31 slides to engage the zero-gear engagement tooth 25 with the first-gear engagement tooth 221, and the second sliding sleeve 32 does not act, at this time, the power output by the driving motor 10 is transmitted to the differential 30 through the first planetary gear set 11, the first driving gear 12, the first driven gear 22, the first-gear engagement tooth 221, the first sliding sleeve 31, the zero-gear engagement tooth 25, the output shaft 2 and the second planetary gear set 21, in this process, the power is reduced by three stages through the first planetary gear set 11, the first driving gear 12 and the first driven gear 22, and the second planetary gear set 21. When the second gear is engaged, the first sliding sleeve 31 slides to the position of the zero-gear engagement tooth 25 and does not engage with the first-gear engagement tooth 221 and the third-gear engagement tooth 231, and the second sliding sleeve 32 slides to engage the carrier engagement tooth 24 with the second-gear engagement tooth 222, at this time, the power output by the driving motor 10 is transmitted to the differential 30 through the first planetary gear set 11, the first driving gear 12, the first driven gear 22, the second-gear engagement tooth 222, the second sliding sleeve 32, the carrier engagement tooth 24 and the second carrier 213, in this process, the power is reduced by two stages through the first planetary gear set 11, the first driving gear 12 and the first driven gear 22, and then directly output through the second carrier 213 to reduce the reduction ratio. When the third gear is engaged, the first sliding sleeve 31 slides to engage the zero-gear engagement tooth 25 with the third-gear engagement tooth 231, and the second sliding sleeve 32 slides to the position of the carrier engagement tooth 24 and does not engage with the second-gear engagement tooth 222, at this time, the power output by the driving motor 10 is transmitted to the differential 30 through the second driving gear 13, the second driven gear 23, the third-gear engagement tooth 231, the first sliding sleeve 31, the zero-gear engagement tooth 25, the output shaft 2 and the second planetary gear set 21, in this process, the power is reduced by two stages through the second driving gear 13 and the second driven gear 23, and the second planetary gear set 21. In this embodiment, the transmission ratio of the first driving gear 12 and the first driven gear 22 is greater than that of the second driving gear 13 and the second driven gear 23, so that the transmission ratio of the third gear is smaller, which is more conducive to economy under high-speed cruising.

[0045] For the second arrangement of the input shaft 1, as Figure 5As shown, in the neutral state, the first sliding sleeve 31 slides to the position of the zero-gear engagement tooth 25, and the second sliding sleeve 32 slides to the position of the carrier engagement tooth 24, at this time, the power of the first driven gear 22 and the second driven gear 23 cannot be transmitted to the second planetary gear set 21, thereby cutting off the power transmission between the driving motor 10 and the differential 30. When the first gear is engaged, the first sliding sleeve 31 slides to engage the zero-gear engagement tooth 25 with the first-gear engagement tooth 221, and the second sliding sleeve 32 does not act, at this time, the power output by the driving motor 10 is transmitted to the differential 30 through the first planetary gear set 11, the input shaft 1, the first driving gear 12, the first driven gear 22, the first-gear engagement tooth 221, the first sliding sleeve 31, the zero-gear engagement tooth 25, the output shaft 2 and the second planetary gear set 21, in this process, three-stage reduction is sequentially passed through the first planetary gear set 11, the first driving gear 12 and the first driven gear 22, and the second planetary gear set 21. When the second gear is engaged, the first sliding sleeve 31 slides to the position of the zero-gear engagement tooth 25 and does not engage with the first-gear engagement tooth 221 and the third-gear engagement tooth 231, and the second sliding sleeve 32 slides to engage the carrier engagement tooth 24 with the second-gear engagement tooth 222, at this time, the power output by the driving motor 10 is transmitted to the differential 30 through the first planetary gear set 11, the input shaft 1, the first driving gear 12, the first driven gear 22, the second-gear engagement tooth 222, the second sliding sleeve 32, the carrier engagement tooth 24 and the second carrier 213, after two-stage reduction of the first planetary gear set 11, the first driving gear 12 and the first driven gear 22, the power is directly output through the second carrier 213 to reduce the reduction ratio. When the third gear is engaged, the first sliding sleeve 31 slides to engage the zero-gear engagement tooth 25 with the third-gear engagement tooth 231, and the second sliding sleeve 32 slides to the position of the carrier engagement tooth 24 and does not engage with the second-gear engagement tooth 222, at this time, the power output by the driving motor 10 is transmitted to the differential 30 through the first planetary gear set 11, the input shaft 1, the second driving gear 13, the second driven gear 23, the third-gear engagement tooth 231, the first sliding sleeve 31, the zero-gear engagement tooth 25, the output shaft 2 and the second planetary gear set 21, in this embodiment, the transmission ratio of the first driving gear 12 and the first driven gear 22 is greater than the transmission ratio of the second driving gear 13 and the second driven gear 23, and in the second arrangement of the input shaft 1, the transmission ratio of the second driving gear 13 and the second driven gear 23 is less than 1, i.e. speed-up transmission, therefore, when the third gear is engaged, the power is sequentially reduced through the first planetary gear set 11, speeded up through the second driving gear 13 and the second driven gear 23, and reduced through the second planetary gear set 21. Therefore, the transmission ratio of the third gear is smaller, which is more conducive to economy under high-speed cruising.

[0046] Optionally, the output shaft 2 in the embodiment is a hollow shaft, and the half shaft 40 passes through the output shaft 2 to connect with the differential 30. By setting the output shaft 2 as a hollow shaft, it is more conducive to the spatial arrangement of the electric drive axle and improves compactness.

[0047] Further, to better meet the heavy load demand, while reducing the size of parts, and improve the compactness of the structure, the electric drive axle can further include an intermediate shaft 4, the first intermediate gear 41 and the second intermediate gear 42 are connected on the intermediate shaft 4, and at least one of the first intermediate gear 41 and the second intermediate gear 42 is loose on the intermediate shaft 4. For example, the first intermediate gear 41 can be loose on the intermediate shaft 4, and the second intermediate gear 42 can be fixedly sleeved on the intermediate shaft 4; the first intermediate gear 41 can be fixedly sleeved on the intermediate shaft 4, and the second intermediate gear 42 can be loose on the intermediate shaft 4; or the first intermediate gear 41 and the second intermediate gear 42 can be loose on the intermediate shaft 4. The first driving gear 12 is in transmission connection with the first driven gear 22 through the first intermediate gear 41, and the second driving gear 13 is in transmission connection with the second driven gear 23 through the second intermediate gear 42. When the intermediate shaft 4 is not arranged, the first driving gear 12 and the first driven gear 22 are directly engaged, and the second driving gear 13 and the second driven gear 23 are directly engaged. When the intermediate shaft 4 is arranged, the first driving gear 12 and the first intermediate gear 41 are engaged, and the first intermediate gear 41 and the first driven gear 22 are engaged; the second driving gear 13 and the second intermediate gear 42 are engaged, and the second intermediate gear 42 and the second driven gear 23 are engaged. By arranging the intermediate shaft 4 and the first intermediate gear 41 and the second intermediate gear 42, the size of each part can be reduced, thereby improving the compactness of the space. On this basis, by reasonably arranging the size of the first intermediate gear 41 and the second intermediate gear 42, the transmission ratio of different gears can be further increased or reduced, for example, by arranging a larger size of the first intermediate gear 41, two-stage speed reduction of the first driving gear 12, the first intermediate gear 41 and the first driven gear 22 is realized, thereby further improving the transmission ratio of the first gear and the second gear, and outputting greater torque. By arranging a smaller size of the second intermediate gear 42, the second driving gear 13 to the first intermediate gear 41 is speeded up, thereby further reducing the transmission ratio of the third gear, and the economy of high-speed cruising is better.

[0048] Alternatively, the electric drive axle in the embodiment can be arranged as a double-motor scheme to improve the power performance. Correspondingly, the input shaft 1 is arranged as two, the two input shafts 1 are arranged in parallel on both sides of the output shaft 2, and the driving motor 10 is arranged as two, the two driving motors 10 are in transmission connection with the first driving gear 12 and the second driving gear 13 on the two input shafts 1 respectively. The two driving motors 10 drive simultaneously to improve the power performance. It should be noted that the two input shafts 1 are arranged in the same way to avoid motion interference.

[0049] Optionally, the electric drive axle can further be provided with a power take-off shaft 5, a power take-off gear 51 is fixedly sleeved on the power take-off shaft 5, the power take-off gear 51 is engaged with the first driven gear 22 or the second driven gear 23, and the power take-off shaft 5 is used to drive a power take-off device. In order to ensure that the power take-off shaft 5 and the power take-off gear 51 have sufficient space for arrangement, only the electric drive axle of the single-drive motor 10 in the embodiment is provided with the power take-off shaft 5 and the power take-off gear 51.

[0050] The application provides a commercial vehicle comprising the electric drive axle in the embodiment, by arranging the electric drive axle in the embodiment, the transmission ratio of different gears of the commercial vehicle is more reasonable, meanwhile, the distribution of parts is more uniform, and the center of gravity is prevented from being greatly deviated.

[0051] Obviously, the above embodiments of the application are merely exemplary and are not intended to limit the implementation modes of the application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementation modes are not required or can not be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the claims of the application.

Claims

1. Electrically driven axle, characterized in that The application relates to a transmission device, comprising a housing (20) in which a drive motor (10), a transmission and a differential (30) are arranged, wherein the transmission comprises: an input shaft (1) to which a first driving gear wheel (12) and a second driving gear wheel (13) are connected, the drive motor (10) being in transmission connection with the first driving gear wheel (12) and the second driving gear wheel (13) via a first planetary gear (11); an output shaft (2) to which a first driven gear wheel (22), a second driven gear wheel (23) and a second planetary gear (21) are arranged, the first driven gear wheel (22) being in transmission connection with the first driving gear wheel (12), the second driven gear wheel (23) being in transmission connection with the second driving gear wheel (13), the first driven gear wheel (22) and the second driven gear wheel (23) each being mounted on the output shaft (2) in a loose manner, the output of the second planetary gear (21) being connected to the differential (30); a shifting assembly for selectively connecting the first driven gear wheel (22) and the second driven gear wheel (23) to the second planetary gear (21).

2. An electric drive axle according to claim 1, characterized in that The first planetary gear (11) comprises a first sun wheel (111), a first planet wheel (112), a first planet carrier (113) and a first ring gear (114), the first ring gear (114) being fixed to the housing (20), the input shaft (1) being fixed to the motor shaft of the drive motor (10), the first sun wheel (111) and the second driving gear wheel (13) each being fixed to the input shaft (1), the first driving gear wheel (12) being mounted on the input shaft (1) in a loose manner and being fixed to the first planet carrier (113).

3. The electric drive axle of claim 1, wherein, The first planetary gear (11) comprises a first sun wheel (111), a first planet wheel (112), a first planet carrier (113) and a first ring gear (114), the first ring gear (114) being fixed to the housing (20), the first sun wheel (111) being fixed to the motor shaft of the drive motor (10), the input shaft (1) being fixed to the first planet carrier (113), the first driving gear wheel (12) and the second driving gear wheel (13) each being fixed to the input shaft (1).

4. The electric drive axle of claim 1, wherein, The second planetary gear set (21) comprises a second sun gear (211), a second planet gear (212), a second planet carrier (213) and a second ring gear (214), the second ring gear (214) is fixed on the housing (20), the output of the second planetary gear set (21) is the second planet carrier (213), the second sun gear (211) is fixedly sleeved on the output shaft (2), the first driven gear (22) is provided with a one-gear engaging tooth (221) and a two-gear engaging tooth (222) on both sides, the second planet carrier (213) is provided with a planet carrier engaging tooth (24), the second driven gear (23) is provided with a three-gear engaging tooth (231), the output shaft (2) is further provided with a zero-gear engaging tooth (25), the zero-gear engaging tooth (25) is located between the first driven gear (22) and the second driven gear (23), the gear shifting assembly comprises a first sliding sleeve (31) and a second sliding sleeve (32), the first sliding sleeve (31) selectively engages the zero-gear engaging tooth (25) with the one-gear engaging tooth (221) or the three-gear engaging tooth (231), and the second sliding sleeve (32) is used for engaging or disconnecting the two-gear engaging tooth (222) and the planet carrier engaging tooth (24).

5. An electric drive axle according to claim 4, characterized in that, The output shaft (2) is a hollow shaft, and a half shaft (40) passes through the output shaft (2) and is connected with the differential (30).

6. The electric drive axle of claim 1, wherein, The transmission ratio of the first driving gear (12) and the first driven gear (22) is greater than the transmission ratio of the second driving gear (13) and the second driven gear (23).

7. The electric drive axle of claim 1, wherein, Further comprising an intermediate shaft (4), the intermediate shaft (4) is connected with a first intermediate gear (41) and a second intermediate gear (42), at least one of the first intermediate gear (41) and the second intermediate gear (42) is sleeved on the intermediate shaft (4), the first driving gear (12) is in driving connection with the first driven gear (22) through the first intermediate gear (41), and the second driving gear (13) is in driving connection with the second driven gear (23) through the second intermediate gear (42).

8. An electric transaxle as in one of claims 1-7, wherein, The input shaft (1) is provided in two, the two input shafts (1) are arranged in parallel on both sides of the output shaft (2), and the drive motor (10) is provided in two, the two drive motors (10) are in driving connection with the first driving gear (12) and the second driving gear (13) on the two input shafts (1) respectively.

9. An electric transaxle as in one of claims 1-7, wherein, Further comprising a power take-off shaft (5), the power take-off shaft (5) is fixedly sleeved with a power take-off gear (51), the power take-off gear (51) is in engagement with the first driven gear (22) or the second driven gear (23), and the power take-off shaft (5) is used for driving a power take-off device.

10. Commercial vehicle, characterized in that The electric drive axle comprises the electric drive axle according to any one of claims 1-9. The electric drive axle comprises the electric drive axle according to any one of claims 1-9.

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