Drive assembly of electric drive axle, electric drive axle and vehicle

Abstract

The utility model provides a drive assembly of an electric drive axle, the electric drive axle and a vehicle, the drive assembly of the electric drive axle comprises two drive mechanisms arranged on an axle housing assembly of the electric drive axle, each drive mechanism comprises a drive motor, an input shaft, an output shaft and an intermediate shaft, and the input shaft and the output shaft are coaxially arranged; the driving motor is connected with the input shaft, the input shaft is connected with the intermediate shaft through a first transmission pair, multiple transmission assemblies are arranged between the intermediate shaft and the output shaft, and the output shaft is connected with the differential mechanism through a second transmission pair. The output shaft is provided with a joint assembly which can be selectively jointed with the first transmission pair or the transmission assembly, and under the joint of the joint assembly, the input shaft and the output shaft are connected to form a direct power transmission path, or the input shaft is connected with the output shaft through the intermediate shaft to form an indirect power transmission path. The drive assembly of the electric drive axle can meet the requirements of various gears, the use performance of the electric drive axle can be improved, and the large-torque power requirement can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of commercial vehicle electric drive axles, and in particular to a drive assembly of an electric drive axle. The utility model also relates to an electric drive axle provided with the drive assembly of the electric drive axle. At the same time, the utility model also relates to a vehicle provided with the electric drive axle. Background Art

[0002] With the continuous development of the new energy vehicle industry, major automakers and end users are paying more and more attention to the power system of new energy vehicles, especially the structural form of the power system, the space layout of the whole vehicle and other issues. At present, the direct drive form of the drive motor and the traditional axle is widely used in domestic and foreign products. The power is generated by the drive motor, and the power is transmitted to the traditional drive axle through the reduction box or gearbox through the transmission shaft to realize the drive of the whole vehicle.

[0003] In the commercial vehicle field, the direct drive type is similar to the structural layout of traditional fuel vehicles. The drive shaft occupies most of the chassis space, leaving no extra space for the power battery, resulting in a short vehicle range. In addition, the existing electric drive axles are mostly single-motor driven or dual-motor two-speed driven, which cannot meet the needs of high torque power in complex road conditions. Utility Model Content

[0004] In view of this, the utility model aims to provide a drive assembly of an electric drive axle, so as to meet the requirements of various gear positions and help improve the performance of the electric drive axle.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A drive assembly of an electric drive axle, comprising two drive mechanisms arranged on an axle housing assembly of the electric drive axle, wherein the two drive mechanisms each comprise a drive motor, a coaxially arranged input shaft and an output shaft, and an intermediate shaft;

[0007] The drive motor is connected to the input shaft, the input shaft is connected to the intermediate shaft through a first transmission pair, a plurality of transmission components are arranged between the intermediate shaft and the output shaft, and the output shaft is connected to the differential through a second transmission pair;

[0008] The output shaft is provided with a coupling component that can selectively engage with the first transmission pair or the transmission component, and when the coupling component is engaged, the input shaft can be connected to the output shaft to form a direct power transmission path, or the input shaft can be connected to the output shaft through the intermediate shaft to form an indirect power transmission path.

[0009] Furthermore, the two driving mechanisms are arranged symmetrically front and rear with respect to the bridge housing assembly.

[0010] Further, the first transmission pair includes a first driving gear provided on the input shaft, and a first driven gear provided on the intermediate shaft, and the first driving gear is meshed and connected with the first driven gear; and / or, the second transmission pair includes a fifth driving gear provided on the output shaft, and a fifth driven gear connected to the differential transmission, and the fifth driving gear is meshed and connected with the fifth driven gear.

[0011] Furthermore, the plurality of transmission assemblies include a first transmission assembly, a second transmission assembly and a third transmission assembly which are sequentially arranged on one side of the first transmission pair along the axial direction of the output shaft; the first transmission assembly includes a second driving gear provided on the intermediate shaft, and a second driven gear provided on the output shaft, and the second driving gear and the second driven gear are meshed and connected; the second transmission assembly includes a third driving gear provided on the intermediate shaft, and a third driven gear provided on the output shaft, and the third driving gear and the third driven gear are meshed and connected; the third transmission assembly includes a fourth driving gear provided on the intermediate shaft, and a fourth driven gear provided on the output shaft, and the fourth driving gear and the fourth driven gear are meshed and connected.

[0012] Furthermore, the engagement assembly includes a first synchronizer and a second synchronizer disposed on the output shaft; the first synchronizer can selectively engage the first transmission pair or the first transmission assembly, and the second synchronizer can selectively engage the second transmission assembly or the third transmission assembly.

[0013] Furthermore, the second transmission pair is located between the second transmission assembly and the third transmission assembly.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The drive assembly of the electric drive axle described in the utility model can meet various gear requirements through the setting of two drive mechanisms and the engagement control of the engagement component, which is beneficial to improving the performance of the electric drive axle. Moreover, through the setting of various gears, the drive motor can be placed in more high-efficiency ranges, the motor efficiency is high, and it can meet the large torque power requirements of complex road conditions. At the same time, the drive mechanism adopts coaxially arranged input shaft and output shaft, and its structure is more compact, occupies less space, and is beneficial to the layout of the entire vehicle, thereby having a good use effect.

[0016] In addition, the two drive mechanisms are arranged symmetrically with respect to the axle housing assembly, making the structural arrangement of the electric drive axle more balanced. The first transmission pair adopts a first driving gear arranged on the input shaft and a first driven gear arranged on the intermediate shaft, so that the power on the input shaft can be transmitted to the intermediate shaft through the first driving gear and the first driven gear. The second transmission pair adopts a fifth driving gear arranged on the output shaft, and the fifth driving gear is meshed and connected with the half-shaft gear in the differential, so that the power on the output shaft can be transmitted to the differential, thereby driving the vehicle to travel.

[0017] In addition, the plurality of transmission components include a first transmission component, a second transmission component and a third transmission component which are sequentially arranged along the axial direction of the output shaft, and cooperate with the engagement of the engagement component to realize a dual-drive motor four-speed drive structure, which is conducive to energy conservation and emission reduction. The engagement component adopts a first synchronizer and a second synchronizer arranged on the output shaft, which has the characteristics of mature technology and low cost. The second transmission pair is arranged between the second transmission component and the third transmission component, which is conducive to improving the overall balance of each drive mechanism and has a more compact structure.

[0018] Another object of the utility model is to provide an electric drive axle, comprising a bridge housing assembly, a wheel-side reducer assembly, and a drive assembly of the electric drive axle as described above; the wheel-side reducer assemblies are respectively provided at the left and right ends of the bridge housing assembly, and the wheel-side reducer assemblies at both ends are drivingly connected to the differential in the bridge housing assembly.

[0019] Furthermore, the wheel-side reducer assemblies at both ends are drivingly connected to the differential through half-axles, and brake drums are provided on the half-axles at both ends.

[0020] Furthermore, the wheel-side reducer assembly includes a housing, and planetary gears and a planetary carrier arranged in the housing; the housing is connected to the bridge housing assembly, and the planetary gears are meshingly connected to the sun gear arranged on the half-shaft.

[0021] The electric drive axle described in the utility model can meet various gear requirements by adopting the drive assembly of the electric drive axle mentioned above, and combined with the layout of the wheel-side reducer assembly, the power output by the drive motor can be reduced in speed and increased in torque at multiple stages, thereby better meeting the high torque requirements of the whole vehicle under complex road conditions.

[0022] In addition, brake drums are installed on the half shafts at both ends to facilitate the deceleration or braking of the vehicle. A planetary gear transmission structure is adopted between the wheel-side reducer assembly and the half shaft, which has the characteristics of small size, light weight, high load capacity and stable operation.

[0023] Another object of the present invention is to provide a vehicle, in which the above-mentioned electric drive axle is provided.

[0024] The vehicle of the utility model and the electric drive axle as described above have the same beneficial effects as the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the structure of the electric drive axle according to an embodiment of the utility model;

[0027] Figure 2 It is a schematic diagram of the electric drive axle described in the embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the driving mechanism described in the embodiment of the utility model;

[0029] Figure 4 It is a structural diagram of the driving mechanism and the differential in the embodiment of the utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the output shaft according to an embodiment of the utility model;

[0031] Figure 6 It is a structural schematic diagram of the wheel reducer assembly according to an embodiment of the utility model;

[0032] Description of reference numerals:

[0033] 1. Bridge housing assembly; 2. Driving mechanism; 3. Brake drum; 4. Wheel reducer;

[0034] 11. differential; 12. half shaft; 201. drive motor; 202. input shaft; 203. output shaft; 204. intermediate shaft; 205. first driving gear; 206. first driven gear; 207. second driving gear; 208. second driven gear; 209. third driving gear; 210. third driven gear; 211. fourth driving gear; 212. fourth driven gear; 213. fifth driving gear; 214. fifth driven gear; 215. first synchronizer; 216. second synchronizer; 217. first fixed coupling sleeve; 218. second fixed coupling sleeve; 41. housing; 42. planet carrier; 43. planetary gear; 44. sun gear gasket; 45. bolts. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0036] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0039] Embodiment 1

[0040] The present embodiment relates to a drive assembly of an electric drive axle, which can meet various gear requirements and is conducive to improving the performance of the electric drive axle.

[0041] In terms of overall structure, Figures 1 to 3 As shown, the drive assembly of the electric drive axle of this embodiment includes two drive mechanisms 2 arranged on the bridge housing assembly 1 of the electric drive axle, and the two drive mechanisms 2 each include a drive motor 201, a coaxially arranged input shaft 202 and an output shaft 203, and an intermediate shaft 204.

[0042] The driving motor 201 is connected to the input shaft 202, the input shaft 202 is connected to the intermediate shaft 204 through a first transmission pair, a plurality of transmission components are arranged between the intermediate shaft 204 and the output shaft 203, and the output shaft 203 is connected to the differential 11 through a second transmission pair. The output shaft 203 is provided with a coupling component that can selectively engage with the first transmission pair or the transmission component, and under the engagement of the coupling component, the input shaft 202 can be connected to the output shaft 203 to form a direct power transmission path, or the input shaft 202 can be connected to the output shaft 203 through the intermediate shaft 204 to form an indirect power transmission path.

[0043] Based on the above overall introduction, for details, continue to refer to Figures 1 to 3As shown in FIG. 1 , as a preferred embodiment, in this embodiment, two drive mechanisms 2 are integrated in the axle housing assembly 1, and the two drive mechanisms 2 are arranged symmetrically with respect to the axle housing assembly 1, so that the structural arrangement of the electric drive axle is more balanced. Specifically, as Figure 2 As shown in , the two drive mechanisms 2 are identical in structure, and both drive mechanisms 2 include a drive motor 201 , an input shaft 202 and an output shaft 203 , an intermediate shaft 204 , a first transmission pair, a second transmission pair and a plurality of transmission components.

[0044] Among them, in each driving mechanism 2, see Figure 2 and Figure 3 As shown, the power output end of the drive motor 201 is connected to the input shaft 202. The input shaft 202 and the output shaft 203 are coaxially arranged, and the input shaft 202 is connected to the intermediate shaft 204 through the first transmission pair. The power output by the drive motor 201 is transmitted to the input shaft 202, and is transmitted to the intermediate shaft 204 through the first transmission pair. The intermediate shaft 204 is arranged in parallel with the input shaft 202 and the output shaft 203, and multiple groups of transmission components are provided between the intermediate shaft 204 and the output shaft 203. The output shaft 203 is connected to the differential 11 through the second transmission pair. At this time, the power transmitted to the intermediate shaft 204 can be transmitted to the output shaft 203 through each transmission component, and then transmitted through the second transmission sub-box differential 11 to drive the wheels to rotate.

[0045] As a preferred implementation, in this embodiment, the first transmission pair includes a first driving gear 205 fixed on the input shaft 202, and a first driven gear 206 fixed on the intermediate shaft 204, and the first driving gear 205 is meshedly connected with the first driven gear 206. In this way, the power on the input shaft 202 can be transmitted to the intermediate shaft 204 through the first driving gear 205 and the first driven gear 206.

[0046] Also as a preferred implementation, in this embodiment, the second transmission pair includes a fifth driving gear 213 fixed on the output shaft 203, and a fifth driven gear 214 drivingly connected to the differential 11, and the fifth driving gear 213 is meshed and connected with the fifth driven gear 214. At this time, the power on the output shaft 203 is transmitted to the differential 11 through the fifth driving gear 213 and the fifth driven gear 214, thereby driving the wheels to rotate.

[0047] It should be noted that the fifth driven gear 214 is preferably one that is transmission-connected to the differential 11, and the front and rear second transmission pairs share one fifth driven gear 214. In this case, the number of fifth driven gears 214 can be saved, which reduces costs and helps to improve the compactness of the structure.

[0048] The above-mentioned multiple transmission components, as a preferred feasible implementation, the multiple transmission components of this embodiment include a first transmission component, a second transmission component and a third transmission component arranged in sequence on one side of the first transmission pair along the axial direction of the output shaft 203. Among them, the first transmission component includes a second driving gear 207 fixed on the intermediate shaft 204, and a second driven gear 208 loosely sleeved on the output shaft 203, and the second driving gear 207 and the second driven gear 208 are meshed and connected. The second transmission component includes a third driving gear 209 fixed on the intermediate shaft 204, and a third driven gear 210 loosely sleeved on the output shaft 203, and the third driving gear 209 and the third driven gear 210 are meshed and connected. The third transmission component includes a fourth driving gear 211 fixed on the intermediate shaft 204, and a fourth driven gear 212 loosely sleeved on the output shaft 203, and the fourth driving gear 211 and the fourth driven gear 212 are meshed and connected.

[0049] Therefore, the power on the intermediate shaft 204 can be transmitted to the output shaft 203 through the second driving gear 207 and the second driven gear 208, or through the third driving gear 209 and the third driven gear 210, or through the fourth driving gear 211 and the fourth driving gear.

[0050] It is worth noting that, in addition to the three groups of transmission components set up as mentioned above, the multiple transmission components can also be set to four or five or more.

[0051] On the basis of the coaxial arrangement of the input shaft 202 and the output shaft 203, and in combination with the arrangement of the first transmission pair, the second transmission pair and the plurality of transmission components, preferably, the engagement component of this embodiment specifically includes a first synchronizer 215 and a second synchronizer 216 arranged on the output shaft 203. Among them, the first synchronizer 215 can selectively engage the first transmission pair or the first transmission component, and the second synchronizer 216 can selectively engage the second transmission component or the third transmission component. In specific implementation, the first synchronizer 215 can selectively engage the first driving gear 205 or the second driven gear 208. The second synchronizer 216 can selectively engage the third driven gear 210 or the fourth driven gear 212.

[0052] As a further preferred embodiment, in this embodiment, the second transmission pair is located between the second transmission assembly and the third transmission assembly. This arrangement can help improve the overall balance of each drive mechanism 2 and make the structure more compact.

[0053] See also Figures 2 to 5As shown, in this embodiment, one end of the input shaft 202 is transmission-connected to the power output end of the drive motor 201, the input shaft 202 is supported by a bearing, and a first driving gear 205 is fixedly connected to the input shaft 202. The intermediate shaft 204 is supported by two bearings arranged at intervals, and a first driven gear 206, a second driving gear 207, a third driving gear 209 and a third driving gear 209 are fixedly connected in sequence along the upper edge of the intermediate shaft 204 in a direction away from the drive motor 201.

[0054] The output shaft 203 is specifically inserted into the input shaft 202, and the output shaft 203 and the input shaft 202 can rotate relative to each other. Figures 2 to 5 As shown, along the direction away from the drive motor 201, the output shaft 203 is provided with a first fixed engagement sleeve 217, a second driven gear 208, a third driven gear 210, a second fixed engagement sleeve 218 and a fourth driven gear 212 in sequence, wherein the second driven gear 208, the third driven gear 210 and the fourth driven gear 212 are loosely sleeved on the output shaft 203, the first fixed engagement sleeve 217, the fifth driving gear 213 and the second fixed engagement sleeve 218 are fixedly connected to the output shaft 203, and the first fixed engagement sleeve 217 and the second fixed engagement sleeve 218 are connected to the corresponding shift forks of the first synchronizer 215 and the second synchronizer 216 described below.

[0055] The drive assembly of the electric drive axle of this embodiment can meet multiple gear requirements through the setting of two drive mechanisms 2 and the engagement control of the engagement assembly, which is conducive to improving the performance of the electric drive axle, and through the setting of multiple gears, the drive motor 201 can be placed in more high-efficiency ranges, the motor efficiency is high, and the high torque power requirements of complex road conditions can be met. At the same time, each drive mechanism 2 adopts a coaxially arranged input shaft 202 and an output shaft 203, which has a more compact structure, occupies less space, and is conducive to the layout of the entire vehicle.

[0056] Embodiment 2

[0057] This embodiment relates to an electric drive bridge. Figure 1 and Figure 2 As shown, the electric drive axle includes a bridge housing assembly 1, a wheel-side reducer 4 assembly, and a drive assembly of the electric drive axle of Embodiment 1. In addition, the left and right ends of the bridge housing assembly 1 are respectively provided with wheel-side reducer 4 assemblies, and the wheel-side reducer 4 assemblies at both ends are drivingly connected to the differential 11 in the bridge housing assembly 1.

[0058] Specifically, the wheel-side reducers 4 assemblies at both ends are connected to the differential 11 through the half shafts 12, and the half shafts 12 at both ends are provided with brake drums 3 for deceleration or braking of the vehicle. Figure 1 and Figure 6As shown, the wheel reducer 4 assembly includes a housing 41, and planetary gears 43 and a planet carrier 42 arranged in the housing 41. The housing 41 is connected to the bridge housing assembly 1, and the planetary gears 43 are meshed and connected with the sun gear arranged on the half shaft 12. The planetary gear 43 transmission structure is adopted between the wheel reducer 4 assembly and the half shaft 12, which has the characteristics of small size, light weight, high load-bearing capacity and stable operation.

[0059] See also Figure 6 As shown, the planetary gear 43 is fixed to the planetary carrier 42 by bolts 45, and the planetary carrier 42 is provided with a through hole for the end of the half shaft 12 to pass through, the sun gear at the end of the half shaft 12 is meshed and connected with the planetary gear 43 on the planetary carrier 42, and a sun gear gasket 44 is provided on the outer side of the sun gear.

[0060] The electric drive axle of this embodiment has multiple gear modes, and some of the gear modes are described below.

[0061] a) In the first gear mode, the second synchronizer 216 is engaged with the fourth driven gear 212. At this time, the power transmission route is:

[0062] Input shaft 202 → first driving gear 205 → first driven gear 206 → intermediate shaft 204 → fourth driving gear 211 → fourth driven gear 212 → second synchronizer 216 → output shaft 203 → fifth driving gear 213 → fifth driven gear 214 → differential 11 → half shaft 12 → wheel-side reducer 4.

[0063] b) When in the second gear mode, the second synchronizer 216 is engaged with the third driven gear 210. At this time, the power transmission route is:

[0064] Input shaft 202 → first driving gear 205 → first driven gear 206 → intermediate shaft 204 → third driving gear 209 → third driven gear 210 → second synchronizer 216 → output shaft 203 → fifth driving gear 213 → fifth driven gear 214 → differential 11 → half shaft 12 → wheel-side reducer 4.

[0065] c) When in the third gear mode, the first synchronizer 215 is engaged with the second driven gear 208. At this time, the power transmission route is:

[0066] Input shaft 202 → first driving gear 205 → first driven gear 206 → intermediate shaft 204 → second driving gear 207 → second driven gear 208 → first synchronizer 215 → output shaft 203 → fifth driving gear 213 → fifth driven gear 214 → differential 11 → half shaft 12 → wheel-side reducer 4.

[0067] d) When in the fourth gear mode, the first synchronizer 215 is engaged with the first driving gear 205. At this time, the power transmission route is:

[0068] Input shaft 202 → first driving gear 205 → first synchronizer 215 → output shaft 203 → fifth driving gear 213 → fifth driven gear 214 → differential 11 → half shaft 12 → wheel-side reducer 4.

[0069] In this embodiment, two drive motors 201 are provided. During braking, the drive motor 201 located at the front end of the bridge housing assembly 1 stops providing power, and the drive motor 201 located at the rear end of the bridge housing assembly 1 provides a back-up force. While the motors participate in braking, the braking energy can be recovered.

[0070] The electric drive axle of this embodiment can meet various gear requirements by adopting the drive assembly of the electric drive axle of embodiment one, and the combined effect of the drive mechanism 2 and the wheel-side reducer 4 assembly at both ends enables the power output by the drive motor 201 to be reduced in speed and increased in torque at multiple stages, thereby better meeting the high torque requirements of the vehicle under complex road conditions.

[0071] In addition, the present embodiment also relates to a vehicle, in which the above-mentioned electric drive axle is provided. The vehicle of the present embodiment can realize various gear shifting requirements by adopting the above-mentioned electric drive axle, and can better meet the large torque requirements of the whole vehicle in complex road conditions, thereby facilitating improving the power performance of the vehicle.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drive assembly of an electric drive axle, characterized in that: The invention comprises two drive mechanisms (2) arranged on a bridge housing assembly (1) of an electric drive bridge, wherein the two drive mechanisms (2) each comprise a drive motor (201), a coaxially arranged input shaft (202) and an output shaft (203), and an intermediate shaft (204); The drive motor (201) is connected to the input shaft (202), the input shaft (202) is connected to the intermediate shaft (204) via a first transmission pair, a plurality of transmission components are provided between the intermediate shaft (204) and the output shaft (203), and the output shaft (203) is connected to the differential (11) via a second transmission pair; The output shaft (203) is provided with a coupling component that can selectively engage with the first transmission pair or the transmission component, and when the coupling component is engaged, the input shaft (202) can be connected to the output shaft (203) to form a direct power transmission path, or the input shaft (202) can be connected to the output shaft (203) through the intermediate shaft (204) to form an indirect power transmission path.

2. The drive assembly of the electric drive axle according to claim 1, characterized in that: The two driving mechanisms (2) are arranged symmetrically front and rear with respect to the bridge housing assembly (1).

3. The drive assembly of the electric drive axle according to claim 1, characterized in that: The first transmission pair comprises a first driving gear (205) provided on the input shaft (202), and a first driven gear (206) provided on the intermediate shaft (204), the first driving gear (205) being meshed and connected with the first driven gear (206); and / or, The second transmission pair comprises a fifth driving gear (213) arranged on the output shaft (203), and a fifth driven gear (214) drivingly connected to the differential (11), and the fifth driving gear (213) is meshingly connected to the fifth driven gear (214).

4. The drive assembly of the electric drive axle according to claim 1, characterized in that: The plurality of transmission assemblies include a first transmission assembly, a second transmission assembly and a third transmission assembly which are sequentially arranged on one side of the first transmission pair along the axial direction of the output shaft (203); The first transmission assembly comprises a second driving gear (207) provided on the intermediate shaft (204), and a second driven gear (208) provided on the output shaft (203), wherein the second driving gear (207) and the second driven gear (208) are meshed and connected; The second transmission assembly comprises a third driving gear (209) provided on the intermediate shaft (204), and a third driven gear (210) provided on the output shaft (203), wherein the third driving gear (209) and the third driven gear (210) are meshed and connected; The third transmission assembly comprises a fourth driving gear (211) provided on the intermediate shaft (204), and a fourth driven gear (212) provided on the output shaft (203); the fourth driving gear (211) and the fourth driven gear (212) are meshed and connected.

5. The drive assembly of the electric drive axle according to claim 4, characterized in that: The engagement assembly comprises a first synchronizer (215) and a second synchronizer (216) disposed on the output shaft (203); The first synchronizer (215) can selectively engage the first transmission pair or the first transmission assembly, and the second synchronizer (216) can selectively engage the second transmission assembly or the third transmission assembly.

6. The drive assembly of the electric drive axle according to claim 4, characterized in that: The second transmission pair is located between the second transmission assembly and the third transmission assembly.

7. An electric drive axle, characterized in that: It comprises a bridge housing assembly (1), a wheel-side reducer (4) assembly, and a drive assembly of an electric drive axle according to any one of claims 1 to 6; The wheel-side reducer (4) assemblies are respectively provided at the left and right ends of the bridge housing assembly (1), and the wheel-side reducer (4) assemblies at both ends are drivingly connected to the differential (11) in the bridge housing assembly (1).

8. The electric drive axle according to claim 7, characterized in that: The wheel-side reducer (4) assemblies at both ends are drivingly connected to the differential (11) via half shafts (12), and brake drums (3) are provided on the half shafts (12) at both ends.

9. The electric drive axle according to claim 8, characterized in that: The wheel-side reducer (4) assembly comprises a housing (41), and planetary gears (43) and a planetary carrier (42) arranged in the housing (41); The housing (41) is connected to the bridge housing assembly (1), and the planetary gear (43) is meshingly connected to a sun gear arranged on the half shaft (12).

10. A vehicle, characterized in that: The vehicle is provided with the electric drive axle according to any one of claims 1 to 9.

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