Electric drive axle assembly of electric drive commercial vehicle

Abstract

The utility model provides an electric drive axle assembly of an electric drive commercial vehicle, which relates to the technical field of new energy commercial vehicles and comprises a middle axle electric drive axle assembly, a rear axle electric drive axle assembly, a first motor assembly, a first power transmission component and a half shaft. The electric drive axle assembly adopts a plurality of parallel shafts, a plurality of gear meshing mechanisms and a planet row structure, is compact in structure and high in overall integration level, can realize multi-stage and multi-gear speed change, can control the movable gear sleeve to provide large torque for a vehicle when the vehicle needs large power during starting, accelerating and climbing, and is suitable for large-scale popularization and application. When the vehicle runs at a constant speed or a high speed, the movable gear sleeve can be controlled to provide a large rotating speed for the vehicle, the performance index of the whole vehicle can be improved, and the use cost of the whole vehicle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy commercial vehicles, in particular to an electric drive axle assembly of an electric drive commercial vehicle. Background Art

[0002] Due to the considerable difference between fuel and electricity prices, new energy commercial vehicles have good cost advantages in operation. With the continuous construction and improvement of charging infrastructure and the gradual popularization of battery replacement mode, the economic benefits of new energy commercial vehicles have gradually emerged and expanded, further promoting the development of new energy for commercial vehicles. However, the new energy commercial vehicles currently on the market have the disadvantages of few gears and low overall integration. Utility Model Content

[0003] The purpose of the utility model is to provide an electric drive axle assembly for an electric drive commercial vehicle, which solves the technical problems of a small number of gears and low overall integration of new energy commercial vehicles.

[0004] The utility model provides an electric drive axle assembly for an electric drive commercial vehicle, comprising:

[0005] The middle axle electric drive axle assembly and the rear axle electric drive axle assembly are fixedly mounted on the chassis of the commercial vehicle;

[0006] The middle axle electric drive axle assembly and the rear axle electric drive axle assembly have the same structure, and both include a first motor assembly and a first power transmission component;

[0007] A half shaft, the first motor assembly transmits power to the half shaft through a first power transmission component;

[0008] The first motor assembly and the first power transmission component are matched on one side of the middle bridge electric drive axle assembly and the rear bridge electric drive axle assembly;

[0009] The mid-axle electric drive axle assembly and the rear-axle electric drive axle assembly have three gears respectively, forming eight working conditions.

[0010] A second motor assembly and a traditional power transmission component are added to the other side of the mid-bridge electric drive axle assembly and the rear-bridge electric drive axle assembly. The second motor assembly transmits power to the half-axle through the traditional power transmission component; the second motor assembly and the traditional power transmission component respectively match the first motor assembly and the first power transmission component in the first gear, the second gear and the neutral gear, forming nine working conditions.

[0011] The first motor assembly and the first power transmission assembly on one side of the mid-bridge electric drive axle assembly and the rear-bridge electric drive axle assembly are simultaneously replaced by the third motor assembly and the second power transmission assembly. The third motor assembly transmits power to the half-axle through the second power transmission assembly. The first gear, second gear, third gear and fourth gear of the third motor assembly and the second power transmission assembly of the mid-bridge electric drive axle assembly and the rear-bridge electric drive axle assembly are combined in pairs to form sixteen operating conditions.

[0012] The utility model provides an electric drive axle assembly for an electric drive commercial vehicle through improvement, which has the following improvements and advantages compared with the prior art:

[0013] This electric drive axle assembly adopts multiple parallel shafts, multiple sets of gear meshing mechanisms, and a planetary gear structure. It has a compact structure and a high overall integration. It can achieve multi-stage and multi-speed shifting. When the vehicle needs high power for starting, accelerating, or climbing, the mobile gear sleeve can be controlled to provide a large torque for the vehicle. When the vehicle is traveling at a constant speed or high speed, the mobile gear sleeve can be controlled to provide a high speed for the vehicle, which can improve the performance indicators of the entire vehicle and reduce the cost of using the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the position of the utility model on the whole vehicle;

[0016] Figure 2 This is a schematic diagram of the first gear structure of the first embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the power transmission principle of the first gear position of the first embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the second gear structure of the first embodiment of the utility model;

[0019] Figure 5 This is a schematic diagram of the power transmission principle of the second gear of the first embodiment of the utility model;

[0020] Figure 6 This is a schematic diagram of the neutral structure of the first embodiment of the utility model;

[0021] Figure 7 This is a schematic diagram of the first gear structure of the second embodiment of the utility model;

[0022] Figure 8 This is a schematic diagram of the power transmission principle of the second embodiment of the utility model in the first gear;

[0023] Fig. 9 This is a schematic diagram of the second gear structure of the second embodiment of the utility model;

[0024] Fig.10 This is a schematic diagram of the power transmission principle of the second gear position of the second embodiment of the utility model;

[0025] Fig.11 This is a schematic diagram of the neutral gear structure of the second embodiment of the utility model;

[0026] Fig.12 This is a schematic diagram of the neutral power transmission principle of the second embodiment of the utility model;

[0027] Fig.13 This is a schematic diagram of the first gear structure of the third embodiment of the utility model;

[0028] Fig.14 This is a schematic diagram of the power transmission principle of the third embodiment of the utility model in the first gear;

[0029] Fig.15 This is a schematic diagram of the structure of the second gear of the third embodiment of the utility model;

[0030] Fig.16 This is a schematic diagram of the power transmission principle of the second gear of the third embodiment of the utility model;

[0031] Fig.17 This is a schematic diagram of the third gear structure of the third embodiment of the utility model;

[0032] Fig.18 This is a schematic diagram of the power transmission principle of the third embodiment of the utility model with three gears;

[0033] Fig.19 This is a schematic diagram of the fourth gear structure of the third embodiment of the utility model;

[0034] Fig. 20 This is a schematic diagram of the power transmission principle of the third embodiment of the present utility model with four gears.

[0035] Description of reference numerals:

[0036] 1-commercial vehicle, 11-mid-axle electric drive axle assembly, 12-rear-axle electric drive axle assembly;

[0037] 110-first power transmission component, 111-first motor assembly, 112-first shaft, 113-first gear, 114-second gear, 115-first planetary gear, 116-third gear, 117-first moving gear sleeve, 118-fourth gear, 119-fifth gear, 120-second shaft, 121-sixth gear, 122-seventh gear, 123-first differential, 124-half shaft;

[0038] 210 - conventional power transmission assembly, 211 - second motor assembly, 212 - third shaft, 213 - eighth gear, 214 - ninth gear, 215 - fourth shaft, 216 - tenth gear;

[0039] 310-second power transmission component, 311-third motor assembly, 312-fifth shaft, 313-eleventh gear, 314-twelfth gear, 315-thirteenth gear, 316-sixth shaft, 317-fourteenth gear, 318-second mobile gear sleeve, 319-double planetary gear, 320-housing, 321-fifteenth gear, 322-first planetary outer ring, 323-seventeenth gear, 324-eighteenth gear, 325-second planetary outer ring, 326-sixteenth gear, 327-third mobile gear sleeve, 328-nineteenth gear, 329-second differential. DETAILED DESCRIPTION

[0040] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0042] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] See also Figure 1-6 , the utility model provides a technical solution:

[0044] First embodiment:

[0045] An electric drive axle assembly for an electric drive commercial vehicle, comprising:

[0046] The middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 are fixedly assembled on the chassis of the commercial vehicle 1. The middle axle electric drive axle assembly 11 is located in the middle of the chassis of the commercial vehicle 1, and the rear axle electric drive axle assembly 12 is located at the rear side of the chassis of the commercial vehicle 1. The middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 can be adjusted in gear respectively.

[0047] The middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 have the same structure, and both include a first motor assembly 111 and a first power transmission assembly 110;

[0048] A half shaft 124, the first motor assembly 111 transmits power to the half shaft 124 through the first power transmission assembly 110, the first motor assembly 111 is used to provide power, the power is transmitted to the half shaft 124 through the first power transmission assembly 110, and the half shaft 124 drives the wheels to rotate;

[0049] The first motor assembly 111 and the first power transmission assembly 110 are matched on one side of the middle bridge electric drive axle assembly 11 and the rear bridge electric drive axle assembly 12;

[0050] The middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 have three gears respectively, forming eight working conditions.

[0051] In some embodiments, in order to achieve multi-gear switching of the first motor assembly 111 and the first power transmission assembly 110, the first power transmission assembly 110 includes:

[0052] A first shaft 112, which is fixedly connected to an output end of the first motor assembly 111;

[0053] The first shaft 112 is fixedly mounted with a first gear 113 and a second gear 114;

[0054] The first shaft 112 is rotatably connected to a third gear 116 and a fourth gear 118 via a bearing;

[0055] The first planetary gear 115, the first gear 113 transmits power to the third gear 116 through the first planetary gear 115;

[0056] A first movable gear sleeve 117 is connected to the third gear 116 and the fourth gear 118 or is connected to the second gear 114 and the fourth gear 118 or is not connected to any of the second gear 114, the third gear 116 and the fourth gear 118. The first movable gear sleeve 117 is driven to move;

[0057] A second shaft 120 , on which a fifth gear 119 and a sixth gear 121 are fixedly mounted, and the fifth gear 119 is meshed with the fourth gear 118 ;

[0058] The first differential 123 is integrally or fixedly connected with the seventh gear 122, and the seventh gear 122 is meshed with the sixth gear 121. The seventh gear 122 can be integrally cast and arranged on the output end of the first differential 123, or can be installed on the output end of the first differential 123 by a fixed connection;

[0059] The half shaft 124 is fixedly connected to the output end of the first differential 123 .

[0060] In some embodiments, the working states of the first motor assembly 111 and the first power transmission assembly 110 in three gears are shown. The first mobile gear sleeve 117 is connected to the third gear 116 and the fourth gear 118. At this time, it is the first gear, providing large torque and generating large power, which is suitable for starting, accelerating, and climbing. The first motor assembly 111 sequentially transmits power to the half shaft 124 through the first shaft 112, the first gear 113, the first planetary gear 115, the third gear 116, the first mobile gear sleeve 117, the fourth gear 118, the fifth gear 119, the second shaft 120, the sixth gear 121, the seventh gear 122, and the first differential 123;

[0061] The first movable gear sleeve 117 connects the second gear 114 and the fourth gear 118. At this time, it is the second gear, providing a large speed, which is suitable for the vehicle to be driven at a constant speed or high speed. The first motor assembly 111 transmits power to the half shaft 124 through the first shaft 112, the second gear 114, the first movable gear sleeve 117, the fourth gear 118, the fifth gear 119, the second shaft 120, the sixth gear 121, the seventh gear 122, and the first differential 123 in sequence;

[0062] The first movable gear sleeve 117 is not connected to any of the second gear 114 , the third gear 116 and the fourth gear 118 . At this time, it is in neutral gear, no power is transmitted, and all gears are not involved in power transmission.

[0063] The first motor assembly 111 of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 and the first power transmission assembly 110 are combined in pairs to form eight working conditions.

[0064] In some embodiments, the eight operating conditions of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 are respectively:

[0065] The middle axle electric drive axle assembly is in first gear 11, and the rear axle electric drive axle assembly is in first gear 12. When both electric drive axle assemblies are in first gear, they can generate greater torque and provide greater power.

[0066] 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 second gear. At this time, the front wheel can generate a large torque and provide a large power, and the rear wheel generates a large speed to assist in providing power drive;

[0067] 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 neutral gear. At this time, the front wheels can generate a large torque and provide a large power, while the rear wheels do not provide power.

[0068] 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. At this time, the front wheel generates a large rotation speed to provide a constant speed or high-speed driving power, and the rear wheel can generate a large torque to provide a large power;

[0069] 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. When both electric drive axle assemblies are in the second gear, a high rotation speed is generated to drive the vehicle to travel at a constant speed or at a high speed.

[0070] 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 neutral gear. At this time, the front wheels generate a high rotation speed to provide power for uniform or high-speed driving, and the rear wheels do not provide power;

[0071] The middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in first gear, the front wheels are not powered, and the rear wheels generate a large torque and provide a large power;

[0072] The middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in second gear. The front wheels are not powered, and the rear wheels generate a high rotation speed to provide power for uniform or high-speed driving.

[0073] The gear positions of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 are adjusted according to needs to be suitable for different use environments.

[0074] The eight working conditions are shown in the following table:

[0075] combination Electric drive axle assembly 1(11) Electric drive axle assembly 2 (12) Condition 1 First gear First gear Condition 2 First gear Second gear Condition 3 First gear Neutral Condition 4 Second gear First gear Condition 5 Second gear Second gear Condition 6 Second gear Neutral Condition 7 Neutral First gear Condition 8 Neutral Second gear

[0076] See also Figure 7-12 , the second embodiment:

[0077] In order to assist the first motor assembly 111 and the first power transmission component 110 in driving, a second motor assembly 211 and a traditional power transmission component 210 are added to the other side of the mid-bridge electric drive axle assembly 11 and the rear-bridge electric drive axle assembly 12. The second motor assembly 211 transmits power to the seventh gear 122 through the traditional power transmission component 210, and the seventh gear 122 transmits power to the half-shaft 124 through the first differential 123. The second motor assembly 211 and the traditional power transmission component 210 respectively match the gears adjusted by the first motor assembly 111 and the first power transmission component 110, and use the stepless speed to increase the driving force for each gear of the first power transmission component 110.

[0078] In some embodiments, in order to assist the first motor assembly 111 and the first power transmission assembly 110 in driving, the conventional power transmission assembly 210 includes:

[0079] A third shaft 212, to which an eighth gear 213 is fixedly connected;

[0080] A fourth shaft 215, to which a ninth gear 214 and a tenth gear 216 are fixedly connected;

[0081] The eighth gear 213 is meshed with the ninth gear 214;

[0082] The tenth gear 216 meshes with the seventh gear 122;

[0083] The second motor assembly 211 and the traditional power transmission component 210 respectively match the first motor assembly 111 and the first power transmission component 110 with the first gear, the second gear and the neutral gear, forming nine operating conditions, the first eight of which are the same as the eight operating conditions corresponding to the first embodiment, and the second motor assembly 211 uses the stepless speed to increase the driving force for each gear during this process.

[0084] In some embodiments, the nine operating conditions after the second motor assembly 211 and the traditional power transmission assembly 210 are added to the middle bridge electric drive axle assembly 11 and the rear bridge electric drive axle assembly 12 are respectively:

[0085] The middle axle electric drive axle assembly has 11 first gears, and the rear axle electric drive axle assembly has 12 first gears;

[0086] The middle axle electric drive axle assembly 11 has a first gear, and the rear axle electric drive axle assembly 12 has a second gear;

[0087] The middle axle electric drive axle assembly 11 is in first gear, and the rear axle electric drive axle assembly 12 is in neutral gear;

[0088] The middle axle electric drive axle assembly 11 is in second gear, and the rear axle electric drive axle assembly 12 is in first gear;

[0089] The middle axle electric drive axle assembly 11 is in second gear, and the rear axle electric drive axle assembly 12 is in second gear;

[0090] The middle axle electric drive axle assembly 11 is in second gear, and the rear axle electric drive axle assembly 12 is in neutral gear;

[0091] The middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in first gear;

[0092] The middle axle electric drive axle assembly 11 is in neutral gear, and the rear axle electric drive axle assembly 12 is in second gear;

[0093] The middle axle electric drive axle assembly 11 is in neutral, and the rear axle electric drive axle assembly 12 is in neutral.

[0094] The first eight of these nine operating conditions are the same as the eight operating conditions corresponding to the first embodiment. The second motor assembly 211 uses the stepless speed to increase the driving force for each gear during this process, and will not be repeated. The ninth operating condition is that the middle axle 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.

[0095] The nine working conditions are shown in the following table:

[0096] combination Electric drive axle assembly 1(11) Electric drive axle assembly 2 (12) Condition 1 First gear First gear Condition 2 First gear Second gear Condition 3 First gear Neutral Condition 4 Second gear First gear Condition 5 Second gear Second gear Condition 6 Second gear Neutral Condition 7 Neutral First gear Condition 8 Neutral Second gear Condition 9 Neutral Neutral

[0097] See also Figure 13-20 , the third embodiment:

[0098] In order to realize multi-gear switching during the operation of the third motor assembly 311 and the second power transmission assembly 310, the first motor assembly 111 and the first power transmission assembly 110 on one side of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 are simultaneously replaced with the third motor assembly 311 and the second power transmission assembly 310, and the third motor assembly 311 transmits power to the half shaft 124 through the second power transmission assembly 310;

[0099] The second power transmission assembly 310 includes:

[0100] A fifth shaft 312, which is fixedly connected to the output end of the third motor assembly 311, and an eleventh gear 313 is fixedly connected to the fifth shaft 312;

[0101] Twelfth gear 314;

[0102] a sixth shaft 316 on which a thirteenth gear 315, a fourteenth gear 317 and a fifteenth gear 321 are fixedly connected;

[0103] The eleventh gear 313 transmits power to the thirteenth gear 315 via the twelfth gear 314;

[0104] The double planetary gear 319 is meshed with the outer side of the fifteenth gear 321;

[0105] The first planetary gear outer ring 322 is meshed with the outer side of the double planetary gear 319;

[0106] Housing 320;

[0107] A shaft is fixedly mounted on the middle of the outer wall of the first planetary row outer ring 322, and the sixteenth gear 326 and the seventeenth gear 323 are fixedly connected to the shaft;

[0108] The second planet row outer ring 325;

[0109] The eighteenth gear 324 has a double-row design;

[0110] One side of the eighteenth gear 324 is meshed with the seventeenth gear 323 and the second planetary outer ring 325;

[0111] The second differential 329 is integrated with or fixedly connected to the nineteenth gear 328, and the nineteenth gear 328 is meshed with the other side of the eighteenth gear 324;

[0112] The nineteenth gear 328 can be integrally cast and arranged on the output end of the second differential 329, or can be installed on the output end of the second differential 329 by a fixed connection;

[0113] The output end of the second differential 329 is fixedly connected to the half shaft 124;

[0114] A second movable gear sleeve 318 is connected to the fourteenth gear 317 and the double planetary gear 319 or to the housing 320 and the double planetary gear 319. The second movable gear sleeve 318 is driven to move;

[0115] The third movable gear sleeve 327 connects the second planetary row outer ring 325 and the housing 320 or the second planetary row outer ring 325 and the sixteenth gear 326 . The third movable gear sleeve 327 is driven to move.

[0116] In some embodiments, the working states of the four gears of the third motor assembly 311 and the second power transmission assembly 310 are shown. The second mobile gear sleeve 318 is connected to the fourteenth gear 317 and the double planetary gear 319, and the third mobile gear sleeve 327 is connected to the second planetary gear outer ring 325 and the housing 320. At this time, it is the first gear, providing large torque and generating large power, which is suitable for starting, accelerating, and climbing. The thirteenth gear 315, the sixth shaft 316, the fourteenth gear 317, the fifteenth gear 321, the double planetary gear 319 and the first planetary gear outer ring 322 are in a locked state to form a first transmission whole. The third motor assembly 311 transmits power to the half shaft 124 through the third motor assembly 311, the fifth shaft 312, the eleventh gear 313, the twelfth gear 314, the thirteenth gear 315, the first transmission whole, the seventeenth gear 323, the eighteenth gear 324, the nineteenth gear 328, and the second differential 329 in sequence;

[0117] The second movable gear sleeve 318 connects the fourteenth gear 317 and the double planetary gear 319, and the third movable gear sleeve 327 connects the second planetary gear outer ring 325 and the sixteenth gear 326. At this time, it is the second gear, providing the speed required for slow speed, which is a transition gear with low fuel consumption. The thirteenth gear 315, the sixth shaft 316, the fourteenth gear 317, the fifteenth gear 321, the double planetary gear 319 and the first planetary gear outer ring 322 are in a locked state to form a second transmission whole. The sixteenth gear 326, the second planetary gear outer ring 325, the seventeenth gear 323 and the eighteenth gear 324 are in a locked state to form a third transmission whole. The third motor assembly 311 transmits power to the half shaft 124 through the third motor assembly 311, the fifth shaft 312, the eleventh gear 313, the twelfth gear 314, the thirteenth gear 315, the second transmission whole, the third transmission whole, the eighteenth gear 324, the nineteenth gear 328 and the second differential 329 in sequence.

[0118] The second movable gear sleeve 318 is connected to the housing 320 and the double planetary gear 319, and the third movable gear sleeve 327 is connected to the second planetary gear outer ring 325 and the housing 320. At this time, it is the third gear, which produces greater torque and speed than the second gear, is suitable for overtaking and climbing steep slopes, and the fuel consumption is increased. The third motor assembly 311 transmits power to the half shaft 124 through the third motor assembly 311, the fifth shaft 312, the eleventh gear 313, the twelfth gear 314, the thirteenth gear 315, the fifteenth gear 321, the double planetary gear 319, the first planetary gear outer ring 322, the seventeenth gear 323, the eighteenth gear 324, the nineteenth gear 328, and the second differential 329 in sequence;

[0119] The second movable gear sleeve 318 is connected to the housing 320 and the double planetary gear 319, and the third movable gear sleeve 327 is connected to the second planetary gear outer ring 325 and the sixteenth gear 326. At this time, it is the fourth gear, which produces a higher speed than the second gear and is suitable for high-speed driving. The sixteenth gear 326, the second planetary gear outer ring 325, the seventeenth gear 323 and the eighteenth gear 324 are in a locked state to form a fourth transmission whole. The third motor assembly 311 sequentially transmits power to the half shaft 124 through the third motor assembly 311, the fifth shaft 312, the eleventh gear 313, the twelfth gear 314, the thirteenth gear 315, the fifteenth gear 321, the double planetary gear 319, the first planetary gear outer ring 322, the fourth transmission whole, the eighteenth gear 324, the nineteenth gear 328, and the second differential 329;

[0120] The first gear, the second gear, the third gear and the fourth gear of the third motor assembly 311 and the second power transmission assembly 310 of the middle bridge electric drive axle assembly 11 and the rear bridge electric drive axle assembly 12 are combined in pairs to form sixteen operating conditions.

[0121] In some embodiments, the sixteen operating conditions after the first motor assembly 111 and the first power transmission assembly 110 on one side of the middle bridge electric drive axle assembly 11 and the rear bridge electric drive axle assembly 12 are simultaneously replaced with the third motor assembly 311 and the second power transmission assembly 310 are respectively:

[0122] The middle axle electric drive axle assembly has the first gear 11, the rear axle electric drive axle assembly has the first gear 12, and both sides of the electric drive axle assembly are in the first gear, providing large torque and generating large power, which is suitable for starting, accelerating, and climbing;

[0123] The middle axle electric drive axle assembly 11 is in first gear, and the rear axle electric drive axle assembly 12 is in second gear. The front wheels provide large torque and generate large power, and the rear wheels provide the speed required for slow speed.

[0124] The middle axle electric drive axle assembly 11 is in first gear, and the rear axle electric drive axle assembly 12 is in third gear. The front wheels provide large torque and generate large power. Compared with the second gear, the rear wheels generate greater torque and speed, which is suitable for overtaking and climbing steep slopes.

[0125] The middle axle electric drive axle assembly 11 is in first gear, and the rear axle electric drive axle assembly 12 is in fourth gear. The front wheels provide large torque and generate large power, while the rear wheels generate a higher speed compared to the second gear, which is suitable for high-speed driving.

[0126] 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. The front wheels provide the speed required for slow speed, and the rear wheels provide large torque to generate large power.

[0127] The middle axle electric drive axle assembly 11 is in the second gear, the rear axle electric drive axle assembly 12 is in the second gear, and the electric drive axle assemblies on both sides are in the second gear, providing the speed required for slow speed and performing slow speed driving;

[0128] 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. The front wheels provide the speed required for slow speed, and the rear wheels generate greater torque and speed compared to the second gear, which is suitable for overtaking and climbing steep slopes.

[0129] The middle axle electric drive axle assembly 11 has the second gear, and the rear axle electric drive axle assembly 12 has the fourth gear. The front wheels provide the speed required for slow speed, and the rear wheels generate a higher speed than the second gear, which is suitable for high-speed driving.

[0130] 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. Compared with the second gear, the front wheels generate greater torque and speed, which is suitable for overtaking and climbing steep slopes. The rear wheels provide large torque and generate large power.

[0131] The middle axle electric drive axle assembly 11 has a third gear, and the rear axle electric drive axle assembly 12 has a second gear. Compared with the second gear, the front wheels generate greater torque and rotation speed, which is suitable for overtaking and climbing steep slopes, and the rear wheels provide the rotation speed required for slow speed;

[0132] The middle axle electric drive axle assembly 11 has three gears, the rear axle electric drive axle assembly 12 has three gears, and both sides of the electric drive axle assembly are three gears, which produce greater torque and speed compared to the second gear, and are suitable for overtaking and climbing steep slopes;

[0133] The middle axle electric drive axle assembly 11 has a third gear, and the rear axle electric drive axle assembly 12 has a fourth gear. Compared with the second gear, the front wheel generates a greater torque and speed, which is suitable for overtaking and climbing steep slopes. Compared with the second gear, the rear wheel generates a greater speed, which is suitable for high-speed driving.

[0134] The middle axle electric drive axle assembly 11 has a fourth gear, and the rear axle electric drive axle assembly 12 has a first gear. Compared with the second gear, the front wheel generates a higher rotation speed, which is suitable for high-speed driving. The rear wheel provides a large torque and generates a large power.

[0135] The middle axle electric drive axle assembly 11 has a fourth gear, and the rear axle electric drive axle assembly 12 has a second gear. Compared with the second gear, the front wheels generate a larger rotation speed, which is suitable for high-speed driving, and the rear wheels provide the rotation speed required for slow speed;

[0136] The middle axle electric drive axle assembly 11 has four gears, and the rear axle electric drive axle assembly 12 has three gears. Compared with the second gear, the front wheel generates a higher speed, which is suitable for high-speed driving. Compared with the second gear, the rear wheel generates a higher torque and speed, which is suitable for overtaking and climbing steep slopes.

[0137] The middle axle electric drive axle assembly 11 has four gears, the rear axle electric drive axle assembly 12 has four gears, and the electric drive axle assemblies on both sides have four gears, which produce a higher rotation speed compared to the second gear and are suitable for high-speed driving.

[0138] The gear positions of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 are adjusted according to needs to be suitable for different use environments.

[0139] The sixteen working conditions are shown in the following table:

[0140] combination Electric drive axle assembly 1(11) Electric drive axle assembly 2 (12) Condition 1 First gear First gear Condition 2 First gear Second gear Condition 3 First gear Third gear Condition 4 First gear Fourth gear Condition 5 Second gear First gear Condition 6 Second gear Second gear Condition 7 Second gear Third gear Condition 8 Second gear Fourth gear Condition 9 Third gear First gear Condition 10 Third gear Second gear Condition 11 Third gear Third gear Condition 12 Third gear Fourth gear Condition 13 Fourth gear First gear Condition 14 Fourth gear Second gear Condition 15 Fourth gear Third gear Condition 16 Fourth gear Fourth gear

[0141] Working principle:

[0142] Three embodiments are adopted on the middle bridge electric drive axle assembly 11 and the rear bridge electric drive axle assembly 12. In the first embodiment, the first motor assembly 111 is used to provide power, and the power is transmitted through the first power transmission component 110. The first power transmission component 110 has three gears. The middle bridge electric drive axle assembly 11 and the rear bridge electric drive axle assembly 12 can be adjusted to three gears respectively, forming eight working conditions;

[0143] The second embodiment uses the second motor assembly 211 and the traditional power transmission component 210 to match the first motor assembly 111 and the gear adjusted by the first power transmission component 110, and uses the stepless speed to increase the driving force for each gear of the first power transmission component 110. Because the second motor assembly 211 can provide power alone, the first power transmission component 110 on the middle bridge electric drive axle assembly 11 and the rear bridge electric drive axle assembly 12 can be adjusted to neutral, forming nine working conditions;

[0144] In the third embodiment, the first motor assembly 111 and the first power transmission assembly 110 on one side of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 are simultaneously replaced with the third motor assembly 311 and the second power transmission assembly 310. The second power transmission assembly 310 has four gears. The middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 can be adjusted to four gears respectively, forming sixteen working conditions.

[0145] In the three embodiments, the structures of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 all adopt multiple parallel shafts, multiple sets of gear meshing mechanisms, and planetary gear structures. The structure is compact and the overall integration is high. Multi-stage and multi-gear shifting can be achieved. When the vehicle is starting, accelerating, or climbing and requires high power, the mobile gear sleeve can be controlled to provide the vehicle with a large torque. When the vehicle is traveling at a constant speed or high speed, the mobile gear sleeve can be controlled to provide the vehicle with a high speed, which can improve the performance indicators of the entire vehicle and reduce the cost of using the entire vehicle.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An electric drive axle assembly for an electric drive commercial vehicle, characterized in that: include: A mid-bridge electric drive axle assembly (11) and a rear-bridge electric drive axle assembly (12), both of which are fixedly mounted on the chassis of a commercial vehicle (1); The middle axle electric drive axle assembly (11) and the rear axle electric drive axle assembly (12) have the same structure, and both include a first motor assembly (111) and a first power transmission component (110); A half shaft (124), wherein the first motor assembly (111) transmits power to the half shaft (124) through a first power transmission component (110); The middle axle electric drive axle assembly (11) and the rear axle electric drive axle assembly (12) are matched with a first motor assembly (111) and a first power transmission assembly (110) on one side at the same time; The middle axle electric drive axle assembly (11) and the rear axle electric drive axle assembly (12) respectively have three gear positions, forming eight working conditions.

2. The electric drive axle assembly of an electric drive commercial vehicle according to claim 1, characterized in that: The first power transmission assembly (110) comprises: A first shaft (112) fixedly connected to an output end of the first motor assembly (111); A first gear (113) and a second gear (114) are fixedly mounted on the first shaft (112); The first shaft (112) is rotatably connected to a third gear (116) and a fourth gear (118) via a bearing; A first planetary gear (115), wherein the first gear (113) transmits power to a third gear (116) via the first planetary gear (115); A first movable gear sleeve (117), which is connected to the third gear (116) and the fourth gear (118) or connected to the second gear (114) and the fourth gear (118) or is not connected to any of the second gear (114), the third gear (116) and the fourth gear (118); a second shaft (120), on which a fifth gear (119) and a sixth gear (121) are fixedly mounted, and the fifth gear (119) is meshed with the fourth gear (118); A first differential (123), which is integrally or fixedly connected with a seventh gear (122), and the seventh gear (122) is meshed with the sixth gear (121); The half shaft (124) is fixedly connected to the output end of the first differential (123).

3. The electric drive axle assembly of an electric drive commercial vehicle according to claim 2, characterized in that: The first movable gear sleeve (117) is connected to the third gear (116) and the fourth gear (118), which is the first gear. The first motor assembly (111) sequentially transmits power to the half shaft (124) through the first shaft (112), the first gear (113), the first planetary gear (115), the third gear (116), the first movable gear sleeve (117), the fourth gear (118), the fifth gear (119), the second shaft (120), the sixth gear (121), the seventh gear (122), and the first differential (123); The first movable gear sleeve (117) is connected to the second gear (114) and the fourth gear (118), which is the second gear. The first motor assembly (111) transmits power to the half shaft (124) in sequence through the first shaft (112), the second gear (114), the first movable gear sleeve (117), the fourth gear (118), the fifth gear (119), the second shaft (120), the sixth gear (121), the seventh gear (122), and the first differential (123); The first movable gear sleeve (117) is not connected to any of the second gear (114), the third gear (116) and the fourth gear (118), and is in neutral gear at this time, and no power is transmitted; The first motor assembly (111) and the first power transmission assembly (110) of the middle axle electric drive axle assembly (11) and the rear axle electric drive axle assembly (12) are combined in pairs to form eight operating conditions.

4. The electric drive axle assembly of an electric drive commercial vehicle according to claim 3, characterized in that: The eight operating conditions of the middle axle electric drive axle assembly (11) and the rear axle electric drive axle assembly (12) are respectively: The middle axle electric drive axle assembly (11) is in first gear, and the rear axle electric drive axle assembly (12) is in first gear; The middle axle electric drive axle assembly (11) has a first gear, and the rear axle electric drive axle assembly (12) has a second gear; The middle axle electric drive axle assembly (11) is in first gear, and the rear axle electric drive axle assembly (12) is in neutral gear; The middle axle electric drive axle assembly (11) is in second gear, and the rear axle electric drive axle assembly (12) is in first gear; The middle axle electric drive axle assembly (11) is in second gear, and the rear axle electric drive axle assembly (12) is in second gear; 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 neutral gear; The middle axle electric drive axle assembly (11) is in neutral, and the rear axle electric drive axle assembly (12) is in first gear; The middle axle electric drive axle assembly (11) is in neutral gear, and the rear axle electric drive axle assembly (12) is in second gear.

5. The electric drive axle assembly of an electric drive commercial vehicle according to claim 3, characterized in that: A second motor assembly (211) and a conventional power transmission component (210) are simultaneously provided on the other side of the mid-bridge electric drive axle assembly (11) and the rear-bridge electric drive axle assembly (12); the second motor assembly (211) transmits power to the seventh gear (122) through the conventional power transmission component (210); and the seventh gear (122) transmits power to the half shaft (124) through the first differential (123).

6. The electric drive axle assembly of an electric drive commercial vehicle according to claim 5, characterized in that: The conventional power transmission assembly (210) comprises: a third shaft (212), an eighth gear (213) being fixedly connected to the third shaft (212); a fourth shaft (215), a ninth gear (214) and a tenth gear (216) being fixedly connected to the fourth shaft (215); The eighth gear (213) is meshed with the ninth gear (214); The tenth gear (216) is meshed with the seventh gear (122); The second motor assembly (211) and the conventional power transmission component (210) respectively match the first gear, the second gear and the neutral gear of the first motor assembly (111) and the first power transmission component (110), forming nine working conditions.

7. The electric drive axle assembly of an electric drive commercial vehicle according to claim 5, characterized in that: The nine operating conditions after the second motor assembly (211) and the traditional power transmission assembly (210) are added to the middle bridge electric drive bridge assembly (11) and the rear bridge electric drive bridge assembly (12) are respectively: The middle axle electric drive axle assembly (11) is in first gear, and the rear axle electric drive axle assembly (12) is in first gear; The middle axle electric drive axle assembly (11) has a first gear, and the rear axle electric drive axle assembly (12) has a second gear; The middle axle electric drive axle assembly (11) is in first gear, and the rear axle electric drive axle assembly (12) is in neutral gear; The middle axle electric drive axle assembly (11) is in second gear, and the rear axle electric drive axle assembly (12) is in first gear; The middle axle electric drive axle assembly (11) is in second gear, and the rear axle electric drive axle assembly (12) is in second gear; 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 neutral gear; The middle axle electric drive axle assembly (11) is in neutral, and the rear axle electric drive axle assembly (12) is in first gear; The middle axle electric drive axle assembly (11) is in neutral gear, and the rear axle electric drive axle assembly (12) is in second gear; The middle axle electric drive axle assembly (11) is in neutral position, and the rear axle electric drive axle assembly (12) is in neutral position.

8. The electric drive axle assembly of an electric drive commercial vehicle according to claim 3, characterized in that: The first motor assembly (111) and the first power transmission assembly (110) on one side of the middle axle electric drive axle assembly (11) and the rear axle electric drive axle assembly (12) are simultaneously replaced with a third motor assembly (311) and a second power transmission assembly (310), and the third motor assembly (311) transmits power to the half shaft (124) through the second power transmission assembly (310); The second power transmission assembly (310) comprises: A fifth shaft (312) fixedly connected to an output end of the third motor assembly (311), an eleventh gear (313) fixedly connected to the fifth shaft (312); A twelfth gear (314); a sixth shaft (316) on which a thirteenth gear (315), a fourteenth gear (317) and a fifteenth gear (321) are fixedly connected; The eleventh gear (313) transmits power to the thirteenth gear (315) via the twelfth gear (314); A double planetary gear (319) meshed with the outer side of the fifteenth gear (321); A first planetary gear outer ring (322) meshed with the outer side of the double planetary gear (319); Housing (320); A shaft is fixedly mounted on the middle of the outer wall of the first planetary gear outer ring (322), and a sixteenth gear (326) and a seventeenth gear (323) are fixedly connected to the shaft; Second planet row outer ring (325); An eighteenth gear (324), which has a double-row design; One side of the eighteenth gear (324) is meshed with the seventeenth gear (323) and the outer ring (325) of the second planetary gear; A second differential (329), which is integrally or fixedly connected with a nineteenth gear (328), and the nineteenth gear (328) is meshed with the other side of the eighteenth gear (324); The output end of the second differential (329) is fixedly connected to the half shaft (124); A second movable gear sleeve (318), which connects the fourteenth gear (317) and the double planetary gear (319) or connects the housing (320) and the double planetary gear (319); The third movable gear sleeve (327) connects the second planetary gear outer ring (325) and the housing (320) or the second planetary gear outer ring (325) and the sixteenth gear (326).

9. The electric drive axle assembly of an electric drive commercial vehicle according to claim 8, characterized in that: The second movable gear sleeve (318) is connected to the fourteenth gear (317) and the double planetary gear (319), and the third movable gear sleeve (327) is connected to the second planetary gear outer ring (325) and the housing (320). At this time, it is the first gear. The thirteenth gear (315), the sixth shaft (316), the fourteenth gear (317), the fifteenth gear (321), the double planetary gear (319) and the first planetary gear outer ring (322) are in a locked state to form a first transmission whole. The third motor assembly (311) transmits power to the half shaft (124) in sequence through the third motor assembly (311), the fifth shaft (312), the eleventh gear (313), the twelfth gear (314), the thirteenth gear (315), the first transmission whole, the seventeenth gear (323), the eighteenth gear (324), the nineteenth gear (328) and the second differential (329); The second movable gear sleeve (318) is connected to the fourteenth gear (317) and the double planetary gear (319), and the third movable gear sleeve (327) is connected to the second planetary gear outer ring (325) and the sixteenth gear (326). At this time, it is the second gear. The thirteenth gear (315), the sixth shaft (316), the fourteenth gear (317), the fifteenth gear (321), the double planetary gear (319) and the first planetary gear outer ring (322) are in a locked state to form a second transmission whole. The sixteenth gear (326), the second The planetary outer ring (325), the seventeenth gear (323) and the eighteenth gear (324) are in a locked state to form a third transmission unit, and the third motor assembly (311) sequentially transmits power to the half shaft (124) through the third motor assembly (311), the fifth shaft (312), the eleventh gear (313), the twelfth gear (314), the thirteenth gear (315), the second transmission unit, the third transmission unit, the eighteenth gear (324), the nineteenth gear (328) and the second differential (329); The second movable gear sleeve (318) is connected to the housing (320) and the double planetary gear (319), and the third movable gear sleeve (327) is connected to the second planetary gear outer ring (325) and the housing (320). At this time, it is the third gear. The third motor assembly (311) sequentially transmits power to the half shaft (124) through the third motor assembly (311), the fifth shaft (312), the eleventh gear (313), the twelfth gear (314), the thirteenth gear (315), the fifteenth gear (321), the double planetary gear (319), the first planetary gear outer ring (322), the seventeenth gear (323), the eighteenth gear (324), the nineteenth gear (328), and the second differential (329); The second movable gear sleeve (318) is connected to the housing (320) and the double planetary gear (319), and the third movable gear sleeve (327) is connected to the second planetary gear outer ring (325) and the sixteenth gear (326). At this time, it is the fourth gear. The sixteenth gear (326), the second planetary gear outer ring (325), the seventeenth gear (323) and the eighteenth gear (324) are in a locked state to form a fourth transmission whole. The third motor assembly (311) transmits power to the half shaft (124) in sequence through the third motor assembly (311), the fifth shaft (312), the eleventh gear (313), the twelfth gear (314), the thirteenth gear (315), the fifteenth gear (321), the double planetary gear (319), the first planetary gear outer ring (322), the fourth transmission whole, the eighteenth gear (324), the nineteenth gear (328) and the second differential (329); The third motor assembly (311) and the second power transmission assembly (310) of the middle axle electric drive axle assembly (11) and the rear axle electric drive axle assembly (12) are combined in pairs to form sixteen operating conditions.

10. The electric drive axle assembly of an electric drive commercial vehicle according to claim 8, characterized in that: The sixteen operating conditions after the first motor assembly (111) and the first power transmission assembly (110) on one side of the middle axle electric drive axle assembly (11) and the rear axle electric drive axle assembly (12) are simultaneously replaced with the third motor assembly (311) and the second power transmission assembly (310) are: The middle axle electric drive axle assembly (11) is in first gear, and the rear axle electric drive axle assembly (12) is in first gear; The middle axle electric drive axle assembly (11) has a first gear, and the rear axle electric drive axle assembly (12) has a second gear; The middle axle electric drive axle assembly (11) has a first gear, and the rear axle electric drive axle assembly (12) has a third gear; The middle axle electric drive axle assembly (11) has a first gear, and the rear axle electric drive axle assembly (12) has a fourth gear; The middle axle electric drive axle assembly (11) is in second gear, and the rear axle electric drive axle assembly (12) is in first gear; The middle axle electric drive axle assembly (11) is in second gear, and the rear axle electric drive axle assembly (12) is in second gear; The middle axle electric drive axle assembly (11) has a second gear, and the rear axle electric drive axle assembly (12) has a third gear; The middle axle electric drive axle assembly (11) has a second gear, and the rear axle electric drive axle assembly (12) has a fourth gear; The middle axle electric drive axle assembly (11) has a third gear, and the rear axle electric drive axle assembly (12) has a first gear; The middle axle electric drive axle assembly (11) has a third gear, and the rear axle electric drive axle assembly (12) has a second gear; The middle axle electric drive axle assembly (11) has three gears, and the rear axle electric drive axle assembly (12) has three gears; The middle axle electric drive axle assembly (11) has three gears, and the rear axle electric drive axle assembly (12) has four gears; The middle axle electric drive axle assembly (11) has four gears, and the rear axle electric drive axle assembly (12) has one gear; The middle axle electric drive axle assembly (11) has a fourth gear, and the rear axle electric drive axle assembly (12) has a second gear; The middle axle electric drive axle assembly (11) has four gears, and the rear axle electric drive axle assembly (12) has three gears; The middle axle electric drive axle assembly (11) has four gears, and the rear axle electric drive axle assembly (12) has four gears.

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