Electric drive axle assembly for vehicle

Abstract

The invention discloses an electric drive axle assembly for a vehicle, and relates to the technical field of vehicles, the electric drive axle assembly comprises a middle axle electric drive axle assembly and a rear axle electric drive axle assembly, the middle axle electric drive axle assembly comprises a middle axle shell section speed reduction assembly, and the rear axle electric drive axle assembly comprises a rear axle shell section speed reduction assembly. The middle axle electric drive axle assembly and the rear axle electric drive axle assembly further comprise electric drive main speed reducer assemblies, and the electric drive main speed reducer assemblies comprise any one of the first electric drive main speed reducer assembly, the second electric drive main speed reducer assembly and the third electric drive main speed reducer assembly. According to the electric drive axle assembly, multi-stage and multi-gear speed change can be achieved, the output of the middle axle electric drive axle assembly and the output of the rear axle electric drive axle assembly can meet power of various working conditions, and the effects of large torque and large rotating speed are provided for a vehicle when the vehicle needs large power during starting, accelerating and climbing and the vehicle provides large rotating speed during high-speed running are achieved; therefore, the performance index of the whole vehicle is improved, and the use cost of the whole vehicle is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an electric drive axle assembly for a vehicle. Background Art

[0002] The drive axle refers to the axle that transmits the driving force provided by the vehicle's internal combustion engine or electric motor to the drive wheels, achieves speed reduction and torque increase, and changes the direction of power transmission at the same time. Among them, the drive axle that transmits the power of the electric motor is also called the electric drive axle. It is one of the main components of electric vehicles. The electric drive axle, like the conventional drive axle, is the connecting bridge between the frame and the wheels. In an environment where the popularity of new energy vehicles is increasing, higher requirements are placed on the power and economy of the electric drive axle.

[0003] The electric drive axle assembly of traditional vehicles, such as the electric drive axle assembly used in medium and heavy-duty trucks, usually adopts a single-motor or dual-motor drive mode, and is applicable to limited working conditions. As a result, the vehicle cannot provide adaptive power output when used under different working conditions, which not only makes the vehicle performance low and cannot meet the use requirements, but also the electric drive axle assembly cannot match the power output required for the corresponding working conditions during driving, which will increase the use cost of the vehicle and make it difficult for the electric drive axle assembly used on electric vehicles to meet the diverse use requirements. For this reason, an electric drive axle assembly for a vehicle is proposed. Summary of the invention

[0004] The object of the present invention is to provide an electric drive axle assembly for a vehicle to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an electric drive axle assembly for a vehicle, comprising a mid-bridge electric drive axle assembly and a rear-bridge electric drive axle assembly installed at a vehicle chassis; The middle axle electric drive axle assembly includes a middle axle housing section reduction assembly, the rear axle electric drive axle assembly includes a rear axle housing section reduction assembly, and the middle axle electric drive axle assembly and the rear axle electric drive axle assembly also include an electric drive main reducer assembly; The electric drive main reducer assembly located in the middle axle electric drive axle assembly and the rear axle electric drive axle assembly includes any one of a first electric drive main reducer assembly, a second electric drive main reducer assembly and a third electric drive main reducer assembly.

[0006] Preferably, the middle axle housing section reduction assembly and the rear axle housing section reduction assembly include differentials, the output ends on both sides of the differentials are drivingly connected to half shafts, the output ends of the differentials are connected to the wheel ends of the vehicle through the half shafts, and the electric drive main reducer assemblies located in the middle axle electric drive axle assembly and the rear axle electric drive axle assembly output power to the wheel ends through the differentials and half shafts in sequence.

[0007] Preferably, the first electric drive main reducer assembly comprises: A first motor assembly, wherein a rotating end of the first motor assembly is connected to a first shaft; a third shaft, the third shaft being arranged between the first motor assembly and the differential; A first transmission assembly, the first transmission assembly is arranged between the first shaft and the third shaft, and the first transmission assembly is used to transmit the torque applied by the first motor on the first shaft to the third shaft; The first transmission assembly is arranged between the third shaft and the differential, and is used for transmitting the torque on the third shaft to the differential.

[0008] Preferably, the first transmission assembly comprises: A first gear, wherein the first gear is fixedly connected to the first shaft; a third gear, the third gear being fixedly connected to an end of the third shaft; a second gear, wherein a second shaft is fixedly connected to a middle portion of the second gear, and the first gear transmits the torque to the third gear through the second gear; The first speed change assembly comprises: A fourth gear, the fourth gear being fixedly connected to the middle portion of the third shaft; A fifth gear, the fifth gear is rotatably connected to a side of the third shaft close to the third gear, and an outer wall of the fifth gear is meshedly connected to an input gear of the differential; Sun gear 1, the sun gear 1 is fixedly connected to the end of the third shaft away from the fifth gear, the outer wall of the sun gear is fixedly connected to planet gear 1, and the outer wall of the planet gear 1 is connected to gear ring 1; A shift fork 1, wherein the shift fork 1 is slidably connected to the outer wall of the fifth gear, and the shift fork 1 radially locks the fifth gear and the fourth gear or the planetary gear 1 by moving.

[0009] Preferably, the middle axle housing section reduction gear assembly and the rear axle housing section reduction gear assembly are both provided with a fourth electric drive main reduction gear assembly on a side away from the first electric drive main reduction gear assembly, and the fourth electric drive main reduction gear assembly includes: a fourth motor assembly, the fourth motor assembly being arranged on a side of the differential away from the first motor assembly, and a rotating end of the fourth motor assembly being connected to a fourth shaft; An eighth gear, an outer wall of the eighth gear being meshed and connected with an outer wall of the differential; A fourth transmission assembly is disposed between the fourth shaft and the eighth gear, and is used to transmit the torque of the fourth motor assembly to the eighth gear.

[0010] Preferably, the fourth transmission assembly includes: A sixth gear, the sixth gear being fixedly connected to an outer wall of the fourth shaft; The fifth shaft, the eighth gear is fixedly connected to the end of the fifth shaft, the other end of the fifth shaft is fixedly connected to the seventh gear, and the outer wall of the seventh gear is meshingly connected to the outer wall of the sixth gear.

[0011] Preferably, the second electric drive main reducer assembly comprises: A second motor assembly, wherein a sixth shaft is fixedly connected to a rotating end of the second motor assembly, and a ninth gear is fixedly connected to an outer wall of the sixth shaft; A seventh shaft, wherein a tenth gear meshing with the ninth gear is fixedly connected to the middle of the seventh shaft, an eleventh gear is fixedly connected to the end of the seventh shaft, and a twelfth gear is fixedly connected to the other end of the seventh shaft; The eighth shaft has a second speed change assembly at one end thereof and a third speed change assembly at the other end thereof. The second motor assembly is connected to the differential through the second speed change assembly and the third speed change assembly.

[0012] Preferably, the second speed change assembly comprises: A fourteenth gear, the fourteenth gear being fixedly connected to the end of the eighth shaft; a fifteenth gear, the fifteenth gear being rotatably connected to the outer wall of the eighth shaft and meshing with the eleventh gear; A thirteenth gear, the thirteenth gear is rotatably connected to the outer wall of the eighth shaft and meshes with the twelfth gear; A second shift fork, the second shift fork is meshedly connected to the outer wall of the fourteenth gear, and the second shift fork can be moved and meshed with the thirteenth gear or the fifteenth gear along the axial direction of the fourteenth gear; The third speed change assembly comprises: A seventeenth gear, the seventeenth gear being fixedly connected to the middle portion of the eighth shaft; A second planetary gear, wherein a second sun gear is fixedly connected between the second planetary gear and the eighth shaft, and the second sun gear is externally connected to a second ring gear; A sixteenth gear, the sixteenth gear is located on a side of the seventeenth gear away from the second planetary gear and is fixedly connected to the eighth shaft, and an outer wall of the sixteenth gear is meshedly connected to an input gear of the differential; Shift fork three, said shift fork three is meshingly connected to the outer wall of the seventeenth gear and can be moved and meshed with the planetary gear two or the sixteenth gear along the axial direction of the seventeenth gear.

[0013] Preferably, the third electric drive main reducer assembly comprises: A third motor assembly, wherein a ninth shaft is fixedly connected to a rotating end of the third motor assembly, an eighteenth gear is fixedly connected to an outer wall of the ninth shaft, a tenth shaft is arranged below the eighteenth gear, and a nineteenth gear and a twentieth gear are fixedly connected to an outer wall of the tenth shaft respectively; an eleventh shaft, an end of the eleventh shaft being fixedly connected with a twenty-first gear meshing with the twentieth gear; A fourth speed change assembly is arranged on the eleventh shaft, and the eleventh shaft is connected to the differential through the fourth speed change assembly.

[0014] Preferably, the fourth speed change assembly comprises: A twenty-third gear, the twenty-third gear being fixedly connected to the middle portion of the eleventh shaft; Planetary gear three, wherein a sun gear three is fixedly connected between the planetary gear three and the eleventh shaft, and the outer ring of the sun gear three is drivingly connected to a gear ring three; A twenty-second gear, the twenty-second gear is rotatably connected to an outer wall of the eleventh shaft, and an outer wall of the twenty-second gear is meshedly connected to an input gear of a differential; Shift fork four, the shift fork four is meshedly connected to the outer wall of the twenty-third gear, and the shift fork four can be moved and meshed with the twenty-second gear or the planetary gear three along the axial direction of the twenty-third gear.

[0015] Technical effects and advantages of the present invention: The electric drive axle assembly provided by the present invention is equipped with an electric drive main reducer assembly on the side of the middle axle housing section reduction assembly in the middle axle electric drive axle assembly and the rear axle housing section reduction assembly of the rear axle electric drive axle assembly, and the electric drive main reducer assembly is used as any one of the first electric drive main reducer assembly, the second electric drive main reducer assembly and the third electric drive main reducer assembly, so that the electric drive main reducer assembly can be installed with the corresponding electric drive main reducer assembly according to the use requirements of the vehicle, and can cooperate with the first electric drive main reducer assembly, the second electric drive main reducer assembly and the third electric drive main reducer assembly to achieve multi-stage and multi-speed shifting, so that the output of the middle axle electric drive axle assembly and the rear axle electric drive axle assembly can meet the power of various working conditions, and provide the vehicle with large torque and large speed when the vehicle is in the state of starting, accelerating, climbing and needs large power and providing large speed when the vehicle is driving at high speed, thereby helping to improve the performance indicators of the whole vehicle and reduce the use cost of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a vehicle equipped with an electric drive axle assembly in an embodiment of the present invention.

[0017] Figure 2 This is a schematic structural diagram of the first electrically driven final reducer assembly in the first gear position in the first embodiment of the present invention.

[0018] Figure 3 The figure is a schematic diagram of the power flow when the first electric drive main reducer assembly is in the first gear position in the first embodiment of the present invention.

[0019] Figure 4 This is a schematic structural diagram of the first electrically driven main reducer assembly in the second gear position in the first embodiment of the present invention.

[0020] Figure 5 The figure is a schematic diagram of the power flow when the first electric drive main reducer assembly is in the second gear position in the first embodiment of the present invention.

[0021] Figure 6 This is a schematic structural diagram of the first electrically driven main reducer assembly in the neutral position in the first embodiment of the present invention.

[0022] Figure 7 This is a schematic structural diagram of the first electric drive main reducer assembly in the second embodiment of the present invention being located in the first gear position.

[0023] Figure 8 This is a schematic diagram of the power flow when the first electric drive main reducer assembly is in the first gear position in the second embodiment of the present invention.

[0024] Fig. 9 This is a schematic structural diagram of the first electrically driven main reducer assembly in the second embodiment of the present invention being located in the second gear position.

[0025] Fig.10 This is a schematic diagram of the power flow when the first electric drive main reducer assembly is in the second gear position in the second embodiment of the present invention.

[0026] Fig.11 This is a schematic structural diagram of the first electrically driven main reducer assembly in the second embodiment of the present invention being in neutral.

[0027] Fig.12 This is a schematic diagram of the power flow when the first electric drive main reducer assembly is in neutral in the second embodiment of the present invention.

[0028] Fig.13 This is a schematic structural diagram of the second electric drive main reducer assembly in the third embodiment of the present invention being located in the first gear position.

[0029] Fig.14 This is a schematic diagram of the power flow when the second electric drive main reducer assembly is in the first gear position in the third embodiment of the present invention.

[0030] Fig.15 This is a schematic structural diagram of the second electric drive main reducer assembly in the second gear position in the third embodiment of the present invention.

[0031] Fig.16 This is a schematic diagram of the power flow when the second electric drive main reducer assembly is in the second gear position in the third embodiment of the present invention.

[0032] Fig.17 This is a schematic structural diagram of the second electric drive main reducer assembly in the third embodiment of the present invention in the third gear position.

[0033] Fig.18 This is a schematic diagram of the power flow when the second electric drive main reducer assembly is in the third gear in Embodiment 3 of the present invention.

[0034] Fig.19 This is a schematic structural diagram of the second electric drive main reducer assembly in the third embodiment of the present invention being located at the fourth gear position.

[0035] Fig. 20 This is a schematic diagram of the power flow when the second electric drive main reducer assembly is in the fourth gear in the third embodiment of the present invention.

[0036] Fig.21 This is a schematic structural diagram of the second electrically driven main reducer assembly in the third embodiment of the present invention being in neutral.

[0037] Fig. 22 This is a schematic structural diagram of the third electric drive main reducer assembly in the fourth embodiment of the present invention being located in the first gear position.

[0038] Fig.23 This is a schematic diagram of the power flow when the third electric drive main reducer assembly is in the first gear position in the fourth embodiment of the present invention.

[0039] Fig.24 This is a schematic structural diagram of the third electric drive main reducer assembly in the fourth embodiment of the present invention being located in the second gear position.

[0040] Fig.25 This is a schematic diagram of the power flow when the third electric drive main reducer assembly is in the second gear position in the fourth embodiment of the present invention.

[0041] Fig.26 This is a schematic structural diagram of the third electric drive main reducer assembly in the fourth embodiment of the present invention being in neutral.

[0042] In the figure: 1, vehicle; 11, middle axle electric drive axle assembly; 12, rear axle electric drive axle assembly; 1100, middle axle housing section reduction assembly; 1200, rear axle housing section reduction assembly; 110. First electric drive main reducer assembly; 111. First motor assembly; 112. First shaft; 113. First gear; 114. Second shaft; 115. Second gear; 116. Third shaft; 117. Third gear; 118. Fourth gear; 119. Shift fork 1; 120. Fifth gear; 121. Sun gear 1; 122. Planetary gear 1; 123. Ring gear 1; 124. Differential; 125. Half shaft; 100, fourth electric drive main reducer assembly; 126, fourth shaft; 127, sixth gear; 128, fifth shaft; 129, seventh gear; 130, eighth gear; 131, fourth motor assembly; 210, second electric drive main reducer assembly; 211, second motor assembly; 212, sixth shaft; 213, ninth gear; 214, tenth gear; 215, eleventh gear; 216, twelfth gear; 217, seventh shaft; 218, thirteenth gear; 219, eighth shaft; 220, second shift fork; 221, fourteenth gear; 222, fifteenth gear; 223, sixteenth gear; 224, third shift fork; 225, seventeenth gear; 226, second planetary gear; 227, second sun gear; 228, second ring gear; 310. The third electric drive main reducer assembly; 311. The third motor assembly; 312. The ninth shaft; 313. The eighteenth gear; 314. The nineteenth gear; 315. The tenth shaft; 316. The twentieth gear; 317. The twenty-first gear; 318. The eleventh shaft; 319. The twenty-second gear; 320. The shift fork four; 321. The twenty-third gear; 322. The sun gear three; 323. The planetary gear three; 324. The ring gear three. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The invention provides an electric drive axle assembly for a vehicle.

[0045] Embodiment 1: Figure 1-Figure 6As shown, it includes a middle bridge electric drive axle assembly 11 and a rear bridge electric drive axle assembly 12 installed at the chassis position of the vehicle 1, the middle bridge electric drive axle assembly 11 and the rear bridge electric drive axle assembly 12 can be adjusted respectively, the middle bridge electric drive axle assembly 11 includes a middle bridge shell section reduction assembly 1100 and a first electric drive main reduction gear assembly 110, the rear bridge electric drive axle assembly 12 includes a rear bridge shell section reduction assembly 1200 and a first electric drive main reduction gear assembly 110, the middle bridge shell section reduction assembly 1100 and the rear bridge shell section reduction assembly 1200 both include a differential 124 and a half shaft 125, the differential 124 is provided with a connection with the outer wall power source The output end of the differential 124 is connected to the half shaft 125, and the differential 124 outputs power to the wheel end through the half shaft 125. In this embodiment, the external electric drive power is transmitted to the differential 124, and the differential 124 then outputs the power to the wheel end of the vehicle 1 through the half shaft 125, so that the vehicle 1 can be driven to move. The differential 124 and the half shaft 125 cooperate to not only transmit power to the wheel end of the vehicle 1, but also enable the wheel ends connected to the two half shafts 125 to maintain the difference in speed, so as to adapt to different driving conditions, such as the difference in speed of the inner and outer wheels when turning;The first electric drive main reducer assembly 110 is provided on one side of the middle axle housing section reduction assembly 1100 and the rear axle housing section reduction assembly 1200. The first electric drive main reducer assembly 110 provides a power source for the middle axle housing section reduction assembly 1100 and the rear axle housing section reduction assembly 1200. The first electric drive main reducer assembly 110 includes a third shaft 116, a first motor assembly 111, a transmission component 1 and a fifth gear 120, a first shaft 112, a second shaft 114 and a third gear 117. The third shaft 116 is respectively fixedly connected with a fourth gear 118 and a sun gear 121. The outer wall of the sun gear 121 is connected with Planetary gear 122, planetary gear 122, the outer wall of planetary gear 122 is connected with a gear ring 123, the first motor assembly 111 is used to drive the third shaft 116 to rotate, the first shaft 112 is connected to the first motor assembly 111, the outer wall of the first shaft 112 is connected with a first gear 113, the outer wall of the second shaft 114 is connected with a second gear 115, the outer wall of the second gear 115 is meshed with the first gear 113, the third gear 117 is fixedly connected to the outer wall of the third shaft 116, and the third gear 117 is meshed with the outer wall of the second gear 115, the outer wall of the fifth gear 120 is connected with a movable fork 119, the fork The first motor assembly 111 converts the electric power into rotational power, and outputs the power to the third shaft 116 through the transmission component 1, so that the third shaft 116 can drive the fourth gear 118 and the sun gear 121 to rotate, and then the shift fork 119 is driven to move, so that the inner end of the shift fork 119 is engaged with or separated from the fifth gear 120, and the other inner end of the shift fork 119 is engaged with the planetary gear 122 or the fourth gear 118 or separated from both, so that the neutral gear, the first gear or the second gear can be selected. The adjustment of the second gear position achieves the purpose of gear shifting, so that the vehicle 1 can perform gear shifting and speed change control under different road conditions and adapt to different working conditions; the first motor assembly 111 transmits power to the second shaft 114 and the second gear 115 through the first shaft 112 and the first gear 113, and the second gear 115 then transmits power to the third shaft 116 through the third gear 117, thereby driving the third shaft 116 to rotate. This not only meets the installation requirements and power transmission requirements of the first motor assembly 111, but also can minimize the number of transmission components required, reduce the overall volume, make it more integrated, and increase the utilization rate of the installation space. ;

[0046] It should be noted that the first electric drive main reducer assembly 110 has three gears: a first gear, a second gear and a neutral gear. The specific gear principle is as follows: When the first electric drive main reducer assembly 110 is in the first gear position, that is, the shift fork 119 is connected to the fourth gear 118 through the fifth gear 120, after the power of the first motor assembly 111 is transmitted to the third shaft 116, the third shaft 116 drives the fourth gear 118 to rotate, so that the fourth gear 118 can drive the fifth gear 120 to rotate through the shift fork 119, so that the fifth gear 120 transmits the power to the differential 124, and the differential 124 outputs the power to the wheel end of the vehicle 1 through the half shaft 125; When the first electric drive main reducer assembly 110 is in the second gear position, that is, the shift fork 119 is connected to the planetary gear 122 through the fifth gear 120, after the first motor assembly 111 transmits power to the third shaft 116 through the transmission component 1, the third shaft 116 drives the planetary gear 122 to rotate, and the planetary gear 122 drives the fifth gear 120 to rotate through the shift fork 119, and the fifth gear 120 transmits power to the differential 124, and the differential 124 then transmits the power to the wheel end through the half shaft 125; When the first electric drive main reducer assembly 110 is in neutral, that is, the shift fork 119 is not connected to the planetary gear 122 and the fourth gear 118, the power on the first motor assembly 111 cannot be transmitted to the wheel end; Further, as shown in the following table, the combination of the first gear, the second gear and the neutral gear of the middle axle housing section reduction assembly 1100 or the rear axle housing section reduction assembly 1200 of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 and the first electric drive main reducer assembly 110 forms eight operating conditions, wherein the eight operating conditions are specifically as follows: Working condition 1: the middle axle electric drive axle assembly 11 is in the first gear, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 2: the middle axle electric drive axle assembly 11 is in the first gear position, and the rear axle electric drive axle assembly 12 is in the second gear position; Working condition 3: the middle axle electric drive axle assembly 11 is in the first gear position, and the rear axle electric drive axle assembly 12 is in neutral position; Working condition 4: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 5: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in the second gear; Working condition 6: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in neutral; Working condition 7: the middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 8: the middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in second gear.

[0047] In this embodiment, by utilizing the different rotation speeds of the first motor assembly 111 in the middle axle electric drive axle assembly 11 and the first motor assembly 111 in the rear axle electric drive axle assembly 12, the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 can keep the front and rear wheels rotating at the same speed when in different gears, thereby providing different torques, so that the vehicle can adapt to driving in different environments (such as uphill, overtaking, etc.), improve the vehicle's driving performance, and reduce the cost of using the vehicle.

[0048] Embodiment 2: Figure 7-Figure 12 As shown, on the basis of the first embodiment, the fourth electric drive main reducer assembly 100 is simultaneously installed on the other side of the middle axle housing section reduction assembly 1100 and the rear axle housing section reduction assembly 1200 away from the first electric drive main reducer assembly 110; in some embodiments, the fourth electric drive main reducer assembly 100 includes a fourth motor assembly 131 and a fifth shaft 128, the output end of the fourth motor assembly 131 is connected to the fourth shaft 126, the outer wall of the fourth shaft 126 is fixedly connected to the sixth gear 127, the outer wall of the fifth shaft 128 is respectively fixedly connected to the seventh gear 129 and the eighth gear 130, the seventh gear 129 is meshed and connected with the sixth gear 127, and the eighth gear 130 is drivingly connected to the input end of the differential 124; it should be noted that the fourth motor assembly 131 transmits power to the seventh gear 129 through the fourth shaft 126 and the sixth gear 127, and the seventh gear 129 inputs power to the wheel end through the half shaft 125; this can be achieved; It should be noted that the fourth electric drive main reducer assembly 100 can match the first gear, the second gear and the neutral gear of the first electric drive main reducer assembly 110 to form nine working conditions, wherein the nine working conditions are: Working condition 1: the middle axle electric drive axle assembly 11 is in the first gear, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 2: the middle axle electric drive axle assembly 11 is in the first gear position, and the rear axle electric drive axle assembly 12 is in the second gear position; Working condition 3: the middle axle electric drive axle assembly 11 is in the first gear position, and the rear axle electric drive axle assembly 12 is in neutral position; Working condition 4: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 5: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in the second gear; Working condition 6: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in neutral; Working condition 7: the middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 8: the middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in the second gear; Working condition 9: the middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in neutral.

[0049] The first eight of these nine operating conditions are the same as the eight operating conditions corresponding to the first embodiment. The fourth electric drive main reducer assembly 100 uses the stepless speed to increase the driving force for each gear of the first electric drive main reducer assembly 110, which will not be repeated. The ninth operating condition is that the middle bridge electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 are both in neutral, and only the second motor assembly 211 provides power for slow driving.

[0050] Embodiment 3: Figure 13-Figure 21As shown, on the basis of the first embodiment, the first electric drive main reducer assembly 110 on one side of the middle axle housing section reduction assembly 1100 and the rear axle housing section reduction assembly 1200 can be replaced by a second electric drive main reducer assembly 210; in some embodiments, the second electric drive main reducer assembly 210 includes a second motor assembly 211, an eighth shaft 219, a seventh shaft 217, a second shift fork 220, and a thirteenth gear 218 and a fifteenth gear 222 rotatable on the outer wall of the eighth shaft 219, the eighth shaft 219 is located between the second motor assembly 211 and the differential 124, the end of the seventh shaft 217 is fixedly connected to the eleventh gear 215, and the other end of the seventh shaft 217 The twelfth gear 216 is fixedly connected, the thirteenth gear 218 is meshed with the twelfth gear 216, the fifteenth gear 222 is meshed with the eleventh gear 215, the second fork 220 can move along the outer wall of the fourteenth gear 221, the second fork 220 can be transmission-connected to the fourteenth gear 221 and the thirteenth gear 218 or the fourteenth gear 221 and the fifteenth gear 222, the middle of the seventh shaft 217 is fixedly connected to the tenth gear 214, the output end of the second motor assembly 211 is transmission-connected to the sixth shaft 212, the outer wall of the sixth shaft 212 is fixedly connected to the ninth gear 213, the ninth gear 213 is meshed with the tenth gear 214, the outer wall of the eighth shaft 219 is fixedly connected to the There are a seventeenth gear 225 and a second sun gear 227, the outer wall of the second sun gear 227 is transmission-connected with the second planet gear 226, the outer wall of the second planet gear 226 is transmission-connected with the second gear ring 228, the sixteenth gear 223 is located on the side of the seventeenth gear 225 away from the second planet gear 226, the outer wall of the sixteenth gear 223 is transmission-connected with the input end of the differential 124, the shift fork three 224 can move axially along the outer wall of the sixteenth gear 223, the shift fork three 224 can be transmission-connected with the sixteenth gear 223 and the seventeenth gear 225 or the sixteenth gear 223 and the second planet gear 226, similarly, when the eighth shaft 219 rotates, the shifting is realized by the shift fork three 224. The power on the eighth shaft 219 can be transmitted to the differential 124 through gear shifting, and then the differential 124 outputs the power to the wheel end of the vehicle 1 through the half shaft 125. In this embodiment, the second motor assembly 211 drives the sixth shaft 212 to rotate, and the sixth shaft 212 transmits the power to the seventh shaft 217 through the ninth gear 213 and the tenth gear 214. The fourteenth gear 221 is connected to the fifteenth gear 222 or the fourteenth gear 221 is connected to the thirteenth gear 218 by the second shift fork 220 to achieve gear shifting, so that the power on the seventh shaft 217 can be transmitted to the eighth shaft 219, thereby achieving gear shifting and speed adjustment of the rotation of the eighth shaft 219; It should be noted that the second electric drive final reducer assembly 210 has five gears, namely, the first gear, the second gear, the third gear, the fourth gear and the neutral gear. The working process of each gear is as follows: When the second electric drive main reducer assembly 210 is in the first gear position, that is, the second shift fork 220 is connected to the thirteenth gear 218 through the fourteenth gear 221, and the third shift fork 224 is connected to the second planetary gear 226 through the sixteenth gear 223, the second motor assembly 211 transmits power to the tenth gear 214 through the sixth shaft 212 and the ninth gear 213, the tenth gear 214 transmits power to the thirteenth gear 218 through the seventh shaft 217 and the twelfth gear 216, the thirteenth gear 218 transmits power to the second planetary gear 226 through the second shift fork 220, the fourteenth gear 221 and the second sun gear 227, the second planetary gear 226 transmits power to the differential 124 through the second ring gear 228, the third shift fork 224 and the sixteenth gear 223, and the differential 124 outputs power to the wheel end through the half shaft 125; When the second electric drive main reducer assembly 210 is in the second gear position, that is, the second shift fork 220 is connected to the fifteenth gear 222 through the fourteenth gear 221, and the third shift fork 224 is connected to the second planetary gear 226 through the sixteenth gear 223, the second motor assembly 211 transmits power to the tenth gear 214 through the sixth shaft 212 and the ninth gear 213, the tenth gear 214 transmits power to the fifteenth gear 222 through the seventh shaft 217 and the eleventh gear 215, the fifteenth gear 222 transmits power to the second planetary gear 226 through the second shift fork 220, the fourteenth gear 221 and the second sun gear 227, the second planetary gear 226 transmits power to the differential 124 through the second ring gear 228, the third shift fork 224 and the sixteenth gear 223, and the differential 124 outputs power to the wheel end through the half shaft 125; When the second electric drive main reducer assembly 210 is in the third gear, that is, the second shift fork 220 is connected to the thirteenth gear 218 through the fourteenth gear 221, and the third shift fork 224 is connected to the seventeenth gear 225 through the sixteenth gear 223, the second motor assembly 211 transmits power to the tenth gear 214 through the sixth shaft 212 and the ninth gear 213, the tenth gear 214 transmits power to the thirteenth gear 218 through the seventh shaft 217 and the twelfth gear 216, the thirteenth gear 218 transmits power to the seventeenth gear 225 through the second shift fork 220 and the fourteenth gear 221, the seventeenth gear 225 transmits power to the differential 124 through the third shift fork 224 and the sixteenth gear 223, and the differential 124 outputs power to the wheel end through the half shaft 125; When the second electric drive main reducer assembly 210 is in the fourth gear, that is, the second shift fork 220 is connected to the fifteenth gear 222 through the fourteenth gear 221, and the third shift fork 224 is connected to the seventeenth gear 225 through the sixteenth gear 223, the second motor assembly 211 transmits power to the tenth gear 214 through the sixth shaft 212 and the ninth gear 213, the tenth gear 214 transmits power to the fifteenth gear 222 through the seventh shaft 217 and the eleventh gear 215, the fifteenth gear 222 transmits power to the seventeenth gear 225 through the second shift fork 220 and the fourteenth gear 221, the seventeenth gear 225 transmits power to the differential 124 through the third shift fork 224 and the sixteenth gear 223, and the differential 124 outputs power to the wheel end through the half shaft 125; When the second electric drive main reducer assembly 210 is in the neutral position, that is, when the second shift fork 220 is shifted to the rightmost position and connected to the thirteenth gear 218, all gears do not participate in power transmission.

[0051] Further, the combination of the first gear, the second gear, the third gear, the fourth gear and the neutral gear of the middle axle housing section reduction assembly 1100 or the rear axle housing section reduction assembly 1200 of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 and the second electric drive main reducer assembly 210 can form twenty-four working conditions, and the twenty-four working conditions are as follows: Working condition 1: the middle axle electric drive axle assembly 11 is in the first gear, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 2: the middle axle electric drive axle assembly 11 is in the first gear position, and the rear axle electric drive axle assembly 12 is in the second gear position; Working condition 3: the middle axle electric drive axle assembly 11 is in the first gear position, and the rear axle electric drive axle assembly 12 is in the third gear position; Working condition 4: the middle axle electric drive axle assembly 11 is in the first gear position, and the rear axle electric drive axle assembly 12 is in the fourth gear position; Working condition 5: the middle axle electric drive axle assembly 11 is in the first gear position, and the rear axle electric drive axle assembly 12 is in neutral position; Working condition 6: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 7: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in the second gear; Working condition 8: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in the third gear; Working condition 9: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in the fourth gear; Working condition 10: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in neutral; Working condition 11: the middle axle electric drive axle assembly 11 is in the third gear, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 12: the middle axle electric drive axle assembly 11 is in the third gear, and the rear axle electric drive axle assembly 12 is in the second gear; Working condition 13: the middle axle electric drive axle assembly 11 is in the third gear, and the rear axle electric drive axle assembly 12 is in the third gear; Working condition 14: the middle axle electric drive axle assembly 11 is in the third gear, and the rear axle electric drive axle assembly 12 is in the fourth gear; Working condition 15: the middle axle electric drive axle assembly 11 is in the third gear, and the rear axle electric drive axle assembly 12 is in neutral; Working condition 16: the middle axle electric drive axle assembly 11 is in the fourth gear, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 17: the middle axle electric drive axle assembly 11 is in the fourth gear, and the rear axle electric drive axle assembly 12 is in the second gear; Working condition 18: the middle axle electric drive axle assembly 11 is in the fourth gear, and the rear axle electric drive axle assembly 12 is in the third gear; Working condition 19: the middle axle electric drive axle assembly 11 is in the fourth gear, and the rear axle electric drive axle assembly 12 is in the fourth gear; Working condition 20: the middle axle electric drive axle assembly 11 is in the fourth gear, and the rear axle electric drive axle assembly 12 is in neutral; Working condition 21: the middle axle electric drive axle assembly 11 is in neutral position, and the rear axle electric drive axle assembly 12 is in the first gear position; Working condition 22: the middle axle electric drive axle assembly 11 is in neutral position, and the rear axle electric drive axle assembly 12 is in the second gear position; Working condition 23: the middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in the third gear; Working condition 24: the middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in the fourth gear.

[0052] In this embodiment, by utilizing the different rotation speeds of the second motor assembly 211 in the mid-axle electric drive axle assembly 11 and the second motor assembly 211 in the rear-axle electric drive axle assembly 12, the mid-axle electric drive axle assembly 11 and the rear-axle electric drive axle assembly 12 can maintain the same speed rotation of the front and rear wheels in different gears, thereby providing different torques, so that the vehicle can adapt to driving in different environments (such as uphill, overtaking, etc.), improve the vehicle's driving performance, and reduce the cost of using the vehicle.

[0053] Embodiment 4: Figure 22-Figure 26As shown, on the basis of the first embodiment, the first electric drive main reducer assembly 110 on one side of the middle axle housing section reduction assembly 1100 and the rear axle housing section reduction assembly 1200 can be replaced by a third electric drive main reducer assembly 310, wherein the third electric drive main reducer assembly 310 includes a third motor assembly 311, an eleventh shaft 318, a shift fork four 320, a sun gear three 322 fixed to the end of the eleventh shaft 318, a twenty-third gear 321 fixed to the eleventh shaft 318, a tenth shaft 315, a ninth shaft 312 drivingly connected to the output end of the third motor assembly 311, and a gear 320 fixed to the end of the eleventh shaft 318. The twenty-first gear 317 is connected to the outer wall of the sun gear three 322 with the planetary gear three 323, and the outer wall of the planetary gear three 323 is connected to the ring gear three 324. The twenty-third gear 321 is located on the side of the sun gear three 322 close to the eleventh shaft 318, and the twenty-second gear 319 is provided on the side of the twenty-third gear 321 away from the sun gear three 322. The twenty-second gear 319 can rotate around the eleventh shaft 318, and the shift fork four 320 can move axially along the outer wall of the twenty-second gear 319. The shift fork four 320 can be connected to the twenty-second gear 319 and the planetary gear three 323 or connected to the twenty-second gear 319. The outer wall of the ninth shaft 312 is fixedly connected with the eighteenth gear 313, the end of the tenth shaft 315 is fixedly connected with the nineteenth gear 314 meshing with the eighteenth gear 313, the other end of the tenth shaft 315 is fixedly connected with the twentieth gear 316, the twenty-first gear 317 is meshingly connected with the twentieth gear 316, the end of the eleventh shaft 318 is transmission-connected with the output end of the third motor assembly 311 through the transmission component 2, the third speed change component is arranged between the eleventh shaft 318 and the differential 124, the third speed change component is used to transmit the power on the eleventh shaft 318 to the differential 124, and the In the three-electric drive main reducer assembly 310, the third motor assembly 311 drives the ninth shaft 312 to rotate, and the meshing of the eighteenth gear 313 and the nineteenth gear 314 is coordinated, so that the ninth shaft 312 can transmit power to the outer wall of the tenth shaft 315, and the tenth shaft 315 transmits power to the eleventh shaft 318 through the twentieth gear 316 and the twenty-first gear 317, thereby realizing the driving of the eleventh shaft 318 by the third motor assembly 311, facilitating the installation of the third motor assembly 311, reducing the number of transmission components required, reducing the installation volume, and improving space utilization, so as to be more suitable for installation and use under various working conditions; The third electric drive main reducer assembly 310 has three gear positions: first gear position, second gear position and neutral gear position, wherein the working principle of each gear position is as follows: When the third electric drive main reducer assembly 310 is in the first gear position, that is, the shift fork 4 320 is connected to the 23rd gear 321 through the 22nd gear 319, the third motor assembly 311 transmits power to the 19th gear 314 through the 9th shaft 312 and the 18th gear 313, the 19th gear 314 transmits power to the 21st gear 317, the 11th shaft 318 and the 23rd gear 321 through the 10th shaft 315 and the 20th gear 316, the 23rd gear 321 transmits power to the differential 124 through the shift fork 4 320 and the 22nd gear 319, and the differential 124 outputs power to the wheel end through the half shaft 125; When the third electric drive main reducer assembly 310 is in the second gear, that is, the shift fork four 320 is connected to the planetary gear three 323 through the twenty-second gear 319, the third motor assembly 311 transmits power to the nineteenth gear 314 through the ninth shaft 312 and the eighteenth gear 313, the nineteenth gear 314 transmits power to the twenty-first gear 317, the eleventh shaft 318, the sun gear three 322 and the planetary gear three 323 through the tenth shaft 315 and the twentieth gear 316, the planetary gear three 323 transmits power to the differential 124 through the ring gear three 324, the shift fork four 320 and the twenty-second gear 319, and the differential 124 outputs power to the wheel end through the half shaft 125.

[0054] When the third electric drive final reducer assembly 310 is in neutral, that is, the shift fork 4 320 is not connected to any gear, all gears are not involved in power transmission; In addition, the first gear, the second gear and the neutral gear of the middle axle housing section reduction assembly 1100 or the rear axle housing section reduction assembly 1200 of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 and the third electric drive main reducer assembly 310 are combined to form eight working conditions. The eight working conditions of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 are: Working condition 1: the middle axle electric drive axle assembly 11 is in the first gear, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 2: the middle axle electric drive axle assembly 11 is in the first gear position, and the rear axle electric drive axle assembly 12 is in the second gear position; Working condition 3: the middle axle electric drive axle assembly 11 is in the first gear position, and the rear axle electric drive axle assembly 12 is in neutral position; Working condition 4: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 5: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in the second gear; Working condition 6: the middle axle electric drive axle assembly 11 is in the second gear, and the rear axle electric drive axle assembly 12 is in neutral; Working condition 7: the middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in the first gear; Working condition 8: the middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in second gear.

[0055] In this embodiment, by utilizing the different rotational speeds of the third motor assembly 311 in the mid-axle electric drive axle assembly 11 and the third motor assembly 311 in the rear-axle electric drive axle assembly 12, the mid-axle electric drive axle assembly 11 and the rear-axle electric drive axle assembly 12 can maintain the same rotational speed of the front and rear wheels in different gears, thereby providing different torques, which are suitable for different usage environments, can effectively improve the performance of the entire vehicle, and at the same time reduce the cost of vehicle use, making the use of the vehicle more in line with demand.

[0056] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. 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. An electric drive axle assembly for a vehicle, comprising a mid-bridge electric drive axle assembly (11) and a rear-bridge electric drive axle assembly (12) mounted on a chassis of a vehicle (1); It is characterized in that The middle axle electric drive axle assembly (11) comprises a middle axle housing section reduction assembly (1100), the rear axle electric drive axle assembly (12) comprises a rear axle housing section reduction assembly (1200), and the middle axle electric drive axle assembly (11) and the rear axle electric drive axle assembly (12) further comprise an electric drive main reduction gear assembly; The electric drive main reducer assembly located in the middle axle electric drive axle assembly (11) and the rear axle electric drive axle assembly (12) comprises any one of a first electric drive main reducer assembly (110), a second electric drive main reducer assembly (210) and a third electric drive main reducer assembly (310).

2. The electric drive axle assembly for a vehicle according to claim 1, characterized in that: The middle axle housing section reduction assembly (1100) and the rear axle housing section reduction assembly (1200) include a differential (124), the output ends on both sides of the differential (124) are drivingly connected to half shafts (125), the output end of the differential (124) is connected to the wheel end of the vehicle (1) through the half shaft, and the electric drive main reduction gear assembly located in the middle axle electric drive axle assembly (11) and the rear axle electric drive axle assembly (12) outputs power to the wheel end through the differential (124) and the half shafts (125) in sequence.

3. The electric drive axle assembly for a vehicle according to claim 2, characterized in that: The first electric drive main reducer assembly (110) comprises: A first motor assembly (111), wherein a rotating end of the first motor assembly (111) is connected to a first shaft (112); a third shaft (116), the third shaft (116) being arranged between the first motor assembly (111) and the differential (124); a first transmission assembly, the first transmission assembly being arranged between the first shaft (112) and the third shaft (116), the first transmission assembly being used to transmit the torque exerted by the first motor (111) on the first shaft (112) to the third shaft (116); A first speed change assembly, wherein the first speed change assembly is arranged between the third shaft (116) and the differential (124), and the first speed change assembly is used to transfer the torque on the third shaft (116) to the differential (124).

4. The electric drive axle assembly for a vehicle according to claim 3, characterized in that: The first transmission assembly comprises: A first gear (113), the first gear (113) being fixedly connected to the first shaft (112); a third gear (117), the third gear (117) being fixedly connected to an end of the third shaft (116); a second gear (115), wherein a second shaft (114) is fixedly connected to a middle portion of the second gear (115), and the first gear (113) transmits torque to a third gear (117) through the second gear (115); The first speed change assembly comprises: a fourth gear (118), the fourth gear (118) being fixedly connected to a middle portion of the third shaft (116); a fifth gear (120), the fifth gear (120) being rotatably connected to a side of the third shaft (116) close to the third gear (117), the outer wall of the fifth gear (120) being meshingly connected to an input gear of a differential (124); A sun gear 1 (121), the sun gear 1 (121) being fixedly connected to an end of the third shaft (116) away from the fifth gear (120), the outer wall of the sun gear (121) being fixedly connected to a planetary gear 1 (122), and the outer wall of the planetary gear 1 (122) being connected to a ring gear 1 (123); A shift fork 1 (119), wherein the shift fork 1 (119) is slidably connected to an outer wall of the fifth gear (120), and the shift fork 1 (119) is used to radially lock the fifth gear (120) and the fourth gear (118) or the planetary gear 1 (122) by moving.

5. The electric drive axle assembly for a vehicle according to claim 4, characterized in that: A fourth electric drive main reducer assembly (100) is provided on a side of the middle axle housing section reduction reduction assembly (1100) and the rear axle housing section reduction reduction assembly (1200) away from the first electric drive main reducer assembly (110). The fourth electric drive main reducer assembly (100) comprises: a fourth motor assembly (131), the fourth motor assembly (131) being arranged on a side of the differential (124) away from the first motor assembly (111), the rotating end of the fourth motor assembly (131) being connected to a fourth shaft (126); An eighth gear (130), the outer wall of the eighth gear (130) being meshingly connected with the outer wall of the differential (124); A fourth transmission assembly, the fourth transmission assembly being arranged between the fourth shaft (126) and the eighth gear (130), the fourth transmission assembly being used to transmit the torque of the fourth motor assembly (131) to the eighth gear (130).

6. The electric drive axle assembly for a vehicle according to claim 5, characterized in that: The fourth transmission assembly comprises: a sixth gear (127), the sixth gear (127) being fixedly connected to an outer wall of the fourth shaft (126); A fifth shaft (128), the eighth gear (130) is fixedly connected to the end of the fifth shaft (128), the other end of the fifth shaft (128) is fixedly connected to a seventh gear (129), and the outer wall of the seventh gear (129) is meshingly connected to the outer wall of the sixth gear (127).

7. The electric drive axle assembly for a vehicle according to claim 2, characterized in that: The second electric drive main reducer assembly (210) comprises: A second motor assembly (211), wherein a rotating end of the second motor assembly (211) is fixedly connected to a sixth shaft (212), and an outer wall of the sixth shaft (212) is fixedly connected to a ninth gear (213); a seventh shaft (217), wherein a tenth gear (214) meshing with the ninth gear (213) is fixedly connected to the middle of the seventh shaft (217), an eleventh gear (215) is fixedly connected to the end of the seventh shaft (217), and a twelfth gear (216) is fixedly connected to the other end of the seventh shaft (217); An eighth shaft (219), wherein a second speed change assembly is provided at an end of the eighth shaft (219), and a third speed change assembly is provided at the other end of the eighth shaft (219), and the second motor assembly (211) is drivingly connected to the differential (124) via the second speed change assembly and the third speed change assembly.

8. The electric drive axle assembly for a vehicle according to claim 7, characterized in that: The second speed change assembly comprises: A fourteenth gear (221), the fourteenth gear (221) being fixedly connected to an end of the eighth shaft (219); A fifteenth gear (222), the fifteenth gear (222) being rotatably connected to an outer wall of the eighth shaft (219) and meshing with the eleventh gear (215); A thirteenth gear (218), the thirteenth gear (218) being rotatably connected to the outer wall of the eighth shaft (219) and meshing with the twelfth gear (216); A second shift fork (220), the second shift fork (220) being meshedly connected to the outer wall of the fourteenth gear (221), the second shift fork (220) being movable and meshing with the thirteenth gear (218) or the fifteenth gear (222) along the axial direction of the fourteenth gear (221); The third speed change assembly comprises: a seventeenth gear (225), the seventeenth gear (225) being fixedly connected to the middle portion of the eighth shaft (219); A second planetary gear (226), wherein a second sun gear (227) is fixedly connected between the second planetary gear (226) and the eighth shaft (219), and the second sun gear (227) is externally transmission-connected to a second ring gear (228); a sixteenth gear (223), the sixteenth gear (223) being located on a side of the seventeenth gear (225) away from the second planetary gear (226) and being fixedly connected to the eighth shaft (219), the outer wall of the sixteenth gear (223) being meshingly connected to the input gear of the differential (124); The shift fork three (224) is meshedly connected to the outer wall of the seventeenth gear (225) and can be moved along the axial direction of the seventeenth gear (225) to mesh with the planetary gear two (226) or the sixteenth gear (223).

9. The electric drive axle assembly for a vehicle according to claim 2, characterized in that: The third electric drive main reducer assembly (310) comprises: A third motor assembly (311), wherein a rotating end of the third motor assembly (311) is fixedly connected to a ninth shaft (312), an outer wall of the ninth shaft (312) is fixedly connected to an eighteenth gear (313), a tenth shaft (315) is provided below the eighteenth gear (313), and an outer wall of the tenth shaft (315) is respectively fixedly connected to a nineteenth gear (314) and a twentieth gear (316); an eleventh shaft (318), the end of the eleventh shaft (318) being fixedly connected to a twenty-first gear (317) meshing with the twentieth gear (316); A fourth speed change assembly, the fourth speed change assembly being arranged on the eleventh shaft (318), the eleventh shaft (318) being drivingly connected to the differential (124) via the fourth speed change assembly.

10. The electric drive axle assembly for a vehicle according to claim 9, characterized in that: The fourth speed change assembly comprises: A twenty-third gear (321), the twenty-third gear (321) being fixedly connected to the middle portion of the eleventh shaft (318); Planetary gear three (323), wherein a sun gear three (322) is fixedly connected between the planetary gear three (323) and the eleventh shaft (318), and the outer ring of the sun gear three (322) is drivingly connected to a gear ring three (324); A twenty-second gear (319), the twenty-second gear (319) being rotatably connected to an outer wall of the eleventh shaft (318), the outer wall of the twenty-second gear (319) being meshingly connected to an input gear of the differential (124); Shift fork four (320), the shift fork four (320) is meshedly connected to the outer wall of the twenty-third gear (321), and the shift fork four (320) can move along the axial direction of the twenty-third gear (321) to mesh with the twenty-second gear (319) or the planetary gear three (323).

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