Electric drive axle assembly with multi-gear transmission

Abstract

The utility model relates to the technical field of drive axles, and provides an electric drive axle assembly provided with a multi-gear transmission. The electric drive axle assembly provided with the multi-gear transmission comprises a middle axle electric drive axle, a rear axle electric drive axle, a first motor assembly, a first power transmission assembly, a differential mechanism and a half shaft, multiple cooperative working conditions are achieved through cooperative work of multi-gear change of the middle axle electric drive axle and the rear axle electric drive axle, and when the number of gears of the middle axle electric drive axle and the rear axle electric drive axle is increased, the first motor assembly and the first power transmission assembly are driven to rotate. Explosive exponential increase can occur in the number of cooperative working conditions, the applicability to various tramcar driving states is greatly improved on the premise that the size is guaranteed, the integration degree is improved, and finally the energy-saving effect of the tramcar is improved.

Description

Technical Field

[0001] This utility model relates to the field of drive axle technology, and in particular to an electric drive axle assembly equipped with a multi-speed transmission. Background Technology

[0002] With the rise of electric vehicles, the range of electric vehicles remains a huge problem to be solved. The solution is to increase the number of gears in the electric drive axle assembly to achieve multi-level changes in output torque and speed under the same output power, so as to adapt to various electric vehicle driving conditions, rather than simply increasing the output power. This would reduce energy consumption and increase range. However, existing electric drive axle assemblies have problems such as few gears, low integration and large size, which reduces energy-saving effect. Utility Model Content

[0003] The purpose of this utility model is to provide an electric drive axle assembly equipped with a multi-speed transmission. This electric drive axle assembly equipped with a multi-speed transmission achieves various cooperative working conditions by coordinating the multi-speed changes between the middle axle electric drive axle and the rear axle electric drive axle. It achieves more multi-speed changes in a smaller volume and increases the integration of the structure.

[0004] This utility model provides an electric drive axle assembly equipped with a multi-speed transmission, comprising:

[0005] The middle axle electric drive axle and the rear axle electric drive axle are both fixedly mounted on the chassis of the electric drive vehicle.

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

[0007] The first motor assembly transmits power to the half-shaft via the first power transmission component.

[0008] The middle axle electric drive axle and the rear axle electric drive axle are simultaneously matched with a first motor assembly and a first power transmission component on one side.

[0009] The middle axle electric drive axle and the rear axle electric drive axle each have three gears, which work together to form eight operating conditions.

[0010] The first power transmission component includes:

[0011] The first shaft is fixedly connected to the output end of the first motor assembly;

[0012] A first gear is fixedly mounted on the first shaft;

[0013] A second shaft, on which a second gear is fixedly mounted, and the second gear meshes with the first gear;

[0014] The third shaft is fixedly equipped with a third gear and a fourth gear, and the third gear meshes with the second gear;

[0015] The fifth gear meshes with the fourth gear and is fixedly connected to the first sun gear. The fifth gear is equipped with the first sun gear, the first planet gear, and the first planet carrier to transmit power to the half shaft.

[0016] A first gear ring, a first movable gear sleeve, and a first fixed engagement tooth; the first movable gear sleeve is fitted onto the first gear ring; the first movable gear sleeve can be optionally connected to the first fixed engagement tooth and connected to the first planetary carrier.

[0017] A differential is fixedly connected to a first planetary carrier, and the output end of the differential is fixedly connected to the half-shaft.

[0018] Preferably, when the first movable gear sleeve is connected to the first fixed engagement tooth, it acts as a stop, and the first motor assembly transmits power to the half shaft in sequence through the first shaft, the first gear, the second gear, the second shaft, the third gear, the third shaft, the fourth gear, the fifth gear, the first sun gear, the first planetary gear, the first planetary carrier, and the differential;

[0019] When the first movable gear sleeve is connected to the first planetary carrier, it acts as a stop. At this time, the first movable gear sleeve fixes the first gear ring and the first planetary carrier as a whole. The first motor assembly transmits power to the half shaft in sequence through the first shaft, the first gear, the second gear, the second shaft, the third gear, the third shaft, the fourth gear, the fifth gear, the first sun gear, the first planetary gear, the first planetary carrier, and the differential.

[0020] The first movable gear sleeve is not connected to either the first planetary carrier or the first fixed engagement gear; at this time, it is in neutral and no power is transmitted.

[0021] The three gear positions of the first motor assembly and the first power transmission component of the middle bridge electric drive axle and the rear bridge electric drive axle are combined in pairs to form eight operating conditions.

[0022] Preferably, the eight operating conditions of the middle axle electric drive bridge and the rear axle electric drive bridge are as follows:

[0023] First gear for the middle axle electric drive bridge and first gear for the rear axle electric drive bridge;

[0024] The middle axle electric drive axle is in first gear, and the rear axle electric drive axle is in second gear.

[0025] The middle axle electric drive axle is in first gear, and the rear axle electric drive axle is in neutral.

[0026] The middle axle electric drive axle is in second gear, and the rear axle electric drive axle is in first gear.

[0027] Second gear for the middle axle electric drive bridge and second gear for the rear axle electric drive bridge;

[0028] Second gear for the middle axle electric drive axle, neutral gear for the rear axle electric drive axle;

[0029] The middle axle electric drive axle is in neutral, and the rear axle electric drive axle is in first gear.

[0030] The middle axle electric drive axle is in neutral, and the rear axle electric drive axle is in second gear.

[0031] Preferably, the first motor assembly and the first power transmission component on one side of the middle axle electric drive axle and the rear axle electric drive axle are simultaneously replaced with a second motor assembly and a second power transmission component, and the second motor assembly transmits power to the half shaft through the second power transmission component;

[0032] The second power transmission component includes:

[0033] The fourth shaft is fixedly connected to the output end of the second motor assembly;

[0034] The second sun gear and the sixth gear are fixedly mounted on the fourth shaft;

[0035] The fourth shaft is rotatably connected to the second planetary carrier, the seventh gear, and the eighth gear, with the seventh gear and the eighth gear being fixedly connected.

[0036] The second planetary gear, the second sun gear, transmits power to the second planetary carrier through the second planetary gear;

[0037] The second movable gear sleeve is fitted onto the seventh gear, and the second movable gear sleeve can optionally be connected to the sixth gear and the second planetary carrier;

[0038] The ninth gear meshes with the eighth gear;

[0039] The fifth shaft is fixedly equipped with the tenth gear and the third sun gear;

[0040] The fifth shaft is rotatably connected to an eleventh gear, a third planetary carrier, a third gear ring, and a twelfth gear, with the eleventh gear and the third planetary carrier being fixedly connected, and the third gear ring and the twelfth gear being fixedly connected.

[0041] The third movable gear sleeve is fitted onto the eleventh gear, and the third movable gear sleeve can be optionally connected to the tenth gear and the second fixed engagement gear.

[0042] The third planetary gear, the third sun gear, transmits power to the twelfth gear through the third planetary gear and the third ring gear;

[0043] The thirteenth gear, mentioned above, transmits power to the differential through the twelfth gear.

[0044] Preferably, when the second movable gear sleeve connects the second planetary carrier and the seventh gear, and the third movable gear sleeve connects the eleventh gear and the second fixed engagement gear, it is in a stop position. The fourth shaft, the second sun gear, the second planetary gear, the second planetary carrier, the second movable gear sleeve, the seventh gear, the eighth gear, the ninth gear, the third sun gear, the third planetary gear, the third gear ring, the twelfth gear, the thirteenth gear, and the differential transmit power to the half shaft.

[0045] When the second movable gear sleeve connects the sixth gear and the seventh gear, and the third movable gear sleeve connects the eleventh gear and the second fixed engagement gear, it is in a stop position. The fourth shaft, the second sun gear, the second planetary gear, the sixth gear, the second movable gear sleeve, the seventh gear, the eighth gear, the ninth gear, the third sun gear, the third planetary gear, the third gear ring, the twelfth gear, the thirteenth gear, and the differential transmit power to the half shaft.

[0046] When the second movable gear sleeve connects the second planetary carrier and the seventh gear, and the third movable gear sleeve connects the eleventh gear and the tenth gear, it is in a gear position. The fourth shaft, the second sun gear, the second planetary gear, the second planetary carrier, the second movable gear sleeve, the seventh gear, the eighth gear, the ninth gear, the tenth gear, the third planetary carrier, the third gear ring, the twelfth gear, the thirteenth gear, and the differential transmit power to the half shaft.

[0047] The second moving gear sleeve connects the sixth and seventh gears, and the third moving gear sleeve connects the eleventh and tenth gears. At this time, it is in gear. The fourth shaft, the second sun gear, the second planet gear, the second planet carrier, the second moving gear sleeve, the seventh gear, the eighth gear, the ninth gear, the tenth gear, the third planet carrier, the third gear ring, the twelfth gear, the thirteenth gear, and the differential transmit power to the half shaft.

[0048] The second moving gear sleeve is not connected to either the sixth gear or the second planetary carrier, and the second moving gear sleeve interrupts the transmission of power. The third moving gear sleeve is not connected to either the tenth gear or the second fixed engagement gear, and the transmission of power is interrupted. When at least one of the second moving gear sleeve and the third moving gear sleeve interrupts the transmission of power, it is in neutral and no power is transmitted.

[0049] The five gear positions of the first motor assembly and the first power transmission component of the middle axle electric drive axle and the rear axle electric drive axle can be combined in pairs to form twenty-four operating conditions.

[0050] Preferably, the twenty-four operating conditions of the middle axle electric drive bridge and the rear axle electric drive bridge are as follows:

[0051] First gear for the middle axle electric drive bridge and first gear for the rear axle electric drive bridge;

[0052] The middle axle electric drive axle is in first gear, and the rear axle electric drive axle is in second gear.

[0053] The middle axle electric drive axle has first gear, and the rear axle electric drive axle has third gear.

[0054] The middle axle electric drive axle has first gear, and the rear axle electric drive axle has fourth gear.

[0055] The middle axle electric drive axle is in first gear, and the rear axle electric drive axle is in neutral.

[0056] The middle axle electric drive axle is in second gear, and the rear axle electric drive axle is in first gear.

[0057] Second gear for the middle axle electric drive bridge and second gear for the rear axle electric drive bridge;

[0058] The middle axle electric drive axle has two gears, and the rear axle electric drive axle has three gears.

[0059] The middle axle electric drive axle has two gears, and the rear axle electric drive axle has four gears.

[0060] Second gear for the middle axle electric drive axle, neutral gear for the rear axle electric drive axle;

[0061] The middle axle electric drive axle has three gears, and the rear axle electric drive axle has one gear.

[0062] The middle axle electric drive axle has three gears, and the rear axle electric drive axle has two gears.

[0063] The middle axle electric drive axle has three gears, and the rear axle electric drive axle has three gears.

[0064] The middle axle electric drive axle has three gears, and the rear axle electric drive axle has four gears.

[0065] The middle axle electric drive axle is in third gear, and the rear axle electric drive axle is in neutral.

[0066] The middle axle electric drive axle has four gears, and the rear axle electric drive axle has one gear.

[0067] The middle axle electric drive axle has four gears, and the rear axle electric drive axle has two gears.

[0068] The middle axle electric drive axle has four gears, and the rear axle electric drive axle has three gears.

[0069] The middle axle electric drive axle has four gears, and the rear axle electric drive axle has four gears.

[0070] The middle axle electric drive axle is in fourth gear, and the rear axle electric drive axle is in neutral.

[0071] The middle axle electric drive axle is in neutral, and the rear axle electric drive axle is in first gear.

[0072] The middle axle electric drive axle is in neutral; the rear axle electric drive axle is in second gear.

[0073] The middle axle electric drive axle is in neutral, and the rear axle electric drive axle is in third gear.

[0074] The middle axle electric drive axle is in neutral, and the rear axle electric drive axle is in fourth gear.

[0075] The technical solution of this utility model achieves various cooperative working conditions through the coordinated operation of the middle axle electric drive axle and the rear axle electric drive axle with multiple gear changes. When the number of gears of the middle axle electric drive axle and the rear axle electric drive axle increases, the number of cooperative working conditions will increase exponentially. While ensuring the size, it greatly increases the applicability to various trolley driving states, improves the integration, and ultimately improves the energy-saving effect of the trolley. Attached Figure Description

[0076] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0077] Figure 1 This is an assembly isometric drawing of an electric drive axle assembly equipped with a multi-speed transmission according to the present invention.

[0078] Figure 2 This is a schematic diagram of the first gear of the first type of electric drive axle assembly in this utility model;

[0079] Figure 3 This is a schematic diagram of the power transmission in the first gear of the first type of electric drive axle assembly in this utility model;

[0080] Figure 4 This is a schematic diagram of the second gear of the first type of electric drive axle assembly in this utility model;

[0081] Figure 5 This is a schematic diagram of the power transmission in the second gear of the first type of electric drive axle assembly in this utility model;

[0082] Figure 6 This is a schematic diagram of the neutral position of the first type of electric drive axle assembly in this utility model;

[0083] Figure 7 This is a schematic diagram of the gap in the second power transmission component of this utility model;

[0084] Figure 8 This is a schematic diagram of the first gear of the second power transmission assembly in this utility model;

[0085] Figure 9 This is a schematic diagram of the power transmission of the first gear of the second power transmission component in this utility model;

[0086] Figure 10 This is a schematic diagram of the second gear of the second power transmission component in this utility model;

[0087] Figure 11This is a schematic diagram of the power transmission of the second gear in the second power transmission assembly of this utility model;

[0088] Figure 12 This is a schematic diagram of the third gear of the second power transmission assembly in this utility model;

[0089] Figure 13 This is a schematic diagram of the power transmission of the third gear in the second power transmission assembly of this utility model;

[0090] Figure 14 This is a schematic diagram of the fourth gear of the second power transmission assembly in this utility model;

[0091] Figure 15 This is a schematic diagram of the power transmission of the fourth gear in the second power transmission assembly of this utility model.

[0092] Explanation of reference numerals in the attached figures:

[0093] 11. Middle axle electric drive axle; 12. Rear axle electric drive axle; 110. First power transmission assembly; 111. First motor assembly; 112. First shaft; 113. First gear; 114. Second gear; 115. Second shaft; 116. Third gear; 117. Third shaft; 118. Fourth gear; 119. Fifth gear; 121. First gear ring; 122. Differential; 123. Half shaft; 124. First moving gear sleeve; 125. First planetary gear; 126. First sun gear; 127. First planetary carrier; 128. First fixed engagement gear; 120. Second power transmission assembly; 21 1. Second motor assembly; 212. Fourth shaft; 213. Second planetary gear; 214. Sixth gear; 215. Second planetary carrier; 216. Second moving gear sleeve; 217. Seventh gear; 218. Eighth gear; 219. Ninth gear; 220. Fifth shaft; 221. Tenth gear; 222. Eleventh gear; 223. Third moving gear sleeve; 224. Third planetary gear; 225. Third gear ring; 226. Twelfth gear; 227. Thirteenth gear; 228. Second sun gear; 230. Third planetary carrier; 231. Third sun gear; 232. Second fixed engagement gear. Detailed Implementation

[0094] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0095] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0096] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0097] Please see Figure 1-6 The present invention provides the following technical solution:

[0098] First embodiment:

[0099] An electric drive axle assembly equipped with a multi-speed transmission, comprising:

[0100] The middle axle electric drive axle 11 and the rear axle electric drive axle 12 are fixedly mounted on the chassis of the electric drive vehicle. The middle axle electric drive axle 11 is located in the middle of the vehicle chassis, and the rear axle electric drive axle 12 is located at the rear of the vehicle chassis. The middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 can be adjusted in gear.

[0101] The middle axle electric drive axle 11 and the rear axle electric drive axle 12 have the same structure, both including a first motor assembly 111 and a first power transmission assembly 110;

[0102] Half-shaft 123, the first motor assembly 111 transmits power to half-shaft 123 through the first power transmission component 110;

[0103] The middle axle electric drive axle 11 and the rear axle electric drive axle 12 are simultaneously matched with a first motor assembly 111 and a first power transmission assembly 110 on one side.

[0104] The middle axle electric drive axle 11 and the rear axle electric drive axle 12 each have three gears, which work together to form eight operating conditions.

[0105] The first power transmission assembly 110 includes:

[0106] The first shaft 112 is fixedly connected to the output end of the first motor assembly 111;

[0107] A first gear 113 is fixedly mounted on the first shaft 112;

[0108] The second shaft 115 has a second gear 114 fixedly mounted on it, and the second gear 114 meshes with the first gear 113.

[0109] The third shaft 117 is fixedly mounted with a third gear 116 and a fourth gear 118, and the third gear 116 meshes with the second gear 114.

[0110] The fifth gear 119 meshes with the fourth gear 118. The fifth gear 119 is fixedly connected to the first sun gear 126. The fifth gear 119 is equipped with the first sun gear 126, the first planet gear 125, and the first planet carrier 127 to transmit power to the half shaft 123.

[0111] The first gear ring 121, the first movable gear sleeve 124 and the first fixed engagement tooth 128 are assembled on the first gear ring 121. The first movable gear sleeve 124 can be selectively connected to the first fixed engagement tooth 128 and connected to the first planetary carrier 127.

[0112] Differential 122 is fixedly connected to the first planetary carrier 127, and the output end of differential 122 is fixedly connected to half shaft 123;

[0113] The fifth gear 119 is fixed to the first sun gear 126, and the fifth gear 119 transmits power to the differential 122 through the first sun gear 126, the first planet gear 125 and the first planet carrier 127;

[0114] The first movable gear sleeve 124 is assembled onto the first gear ring 121, and it connects the first gear ring 121 and the first fixed engagement tooth 128 or connects to the first planetary carrier 127 or is not connected to either the first planetary carrier 127 or the first fixed engagement tooth 128.

[0115] Differential 122, which is integrally or fixedly connected to the first planetary carrier 127;

[0116] Half shaft 123 is fixedly connected to the output end of differential 122.

[0117] In this embodiment, when the first movable gear sleeve 124 is connected to the first fixed engagement gear 128, it is in gear 1. The first motor assembly 111 transmits power to the half shaft 123 in sequence through the first shaft 112, the first gear 113, the second gear 114, the second shaft 115, the third gear 116, the third shaft 117, the fourth gear 118, the fifth gear 119, the first sun gear 126, the first planetary gear 125, the first planetary carrier 127, and the differential 122.

[0118] When the first movable gear sleeve 124 is connected to the first planetary carrier 127, it is in gear 2. At this time, the first movable gear sleeve 124 fixes the first gear ring 121 and the first planetary carrier 127 into one unit. The first motor assembly 111 transmits power to the half shaft 123 in sequence through the first shaft 112, the first gear 113, the second gear 114, the second shaft 115, the third gear 116, the third shaft 117, the fourth gear 118, the fifth gear 119, the first sun gear 126, the first planetary gear 125, the first planetary carrier 127, and the differential 122.

[0119] The first moving gear sleeve 124 is not connected to either the first planetary carrier 127 or the first fixed engagement gear 128. At this time, it is in neutral and no power is transmitted.

[0120] The diagram illustrates the three working states of the first motor assembly 111 and the first power transmission component 110. The first moving gear sleeve 124, connected to the first fixed engagement gear 128, is in gear 1, providing high torque and generating significant power, suitable for starting, accelerating, and climbing. The first motor assembly 111 transmits power to the half-shaft 123 sequentially through the first shaft 112, first gear 113, second gear 114, second shaft 115, third gear 116, third shaft 117, fourth gear 118, fifth gear 119, first sun gear 126, first planetary gear 125, first planetary carrier 127, and differential 122.

[0121] The first movable gear sleeve 124 is connected to the first planetary carrier 127 at this time, which is in gear 2, providing a high speed, suitable for the vehicle to be traveling at a constant speed or high speed. At this time, the first movable gear sleeve 124 fixes the first gear ring 121 and the first planetary carrier 127 into one unit. The first motor assembly 111 transmits power to the half shaft 123 in sequence through the first shaft 112, the first gear 113, the second gear 114, the second shaft 115, the third gear 116, the third shaft 117, the fourth gear 118, the fifth gear 119, the first sun gear 126, the first planetary gear 125, the first planetary carrier 127, and the differential 122.

[0122] The first moving gear sleeve 124 is not connected to either the first planetary carrier 127 or the first fixed engagement gear 128. At this time, it is in neutral and no power is transmitted. All gears do not participate in power transmission.

[0123] The first motor assembly 111 of the middle axle electric drive axle 11 and the first power transmission component 110, with their three gears of 1st gear, 2nd gear and neutral gear, are combined in pairs to form eight operating conditions.

[0124] In this embodiment, the eight operating conditions of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 are as follows:

[0125] The eight operating conditions are shown in the table below:

[0126]

[0127] Please see Figure 1 , Figures 7 to 15 The present invention provides the following technical solution:

[0128] Second embodiment:

[0129] To further increase the number of operating conditions and reflect the changing relationship between the number of gears and the number of operating conditions, the first power transmission assembly 110 and the first motor assembly 111 on one side of the middle axle electric drive axle 11 and the rear axle electric drive axle 12 are simultaneously replaced with a second power transmission assembly 120 and a second motor assembly 211. The second motor assembly 211 transmits power to the half-shaft 123 through the second power transmission assembly 120;

[0130] The second power transmission assembly 120 includes:

[0131] The fourth shaft 212 is fixedly connected to the output end of the second motor assembly 211;

[0132] The second sun gear 228 and the sixth gear 214 are fixedly mounted on the fourth shaft 212;

[0133] The second planetary carrier 215, the seventh gear 217 and the eighth gear 218 are rotatably connected on the fourth shaft 212, and the seventh gear 217 and the eighth gear 218 are fixedly connected.

[0134] The second planetary gear 213 and the second sun gear 228 transmit power to the second planetary carrier 215 through the second planetary gear 213;

[0135] The second movable gear sleeve 216 is assembled onto the seventh gear 217, and it connects the seventh gear 217 and the sixth gear 214, or connects the second planetary carrier 215 and the seventh gear 217, or is not connected to either the sixth gear 214 or the second planetary carrier 215.

[0136] Ninth gear 219, eighth gear 218 meshes with ninth gear 219;

[0137] The fifth shaft 220 is fixedly mounted with the tenth gear 221 and the third sun gear 231;

[0138] The fifth shaft 220 is rotatably connected to the eleventh gear 222, the third planetary carrier 230, the third gear ring 225, and the twelfth gear 226, with the eleventh gear 222 and the third planetary carrier 230 being fixedly connected, and the third gear ring 225 and the twelfth gear 226 being fixedly connected.

[0139] The third moving gear sleeve 223 is assembled onto the eleventh gear 222, and it connects the tenth gear 221 and the eleventh gear 222 or the eleventh gear 222 and the second fixed engagement tooth 232, or it is not connected to either the tenth gear 221 or the second fixed engagement tooth 232.

[0140] The third planetary gear 224 and the third sun gear 231 transmit power to the twelfth gear 226 through the third planetary gear 224, the third ring gear 225, and the third planetary gear 224.

[0141] The thirteenth gear 227 and the twelfth gear 226 transmit power to the differential 122 through the thirteenth gear 227.

[0142] In this embodiment, the five gear positions of the second motor assembly 211 and the second power transmission assembly 120 are shown. When the second moving gear sleeve 216 connects the second planetary carrier 215 and the seventh gear 217, and the third moving gear sleeve 223 connects the eleventh gear 222 and the second fixed engagement gear 232, it is in gear 1. The fourth shaft 212, the second sun gear 228, the second planetary gear 213, the second planetary carrier 215, the second moving gear sleeve 216, the seventh gear 217, the eighth gear 218, the ninth gear 219, the third sun gear 231, the third planetary gear 224, the third gear ring 225, the twelfth gear 226, the thirteenth gear 227, and the differential 122 transmit power to the half shaft 123.

[0143] When the second moving gear sleeve 216 connects to the sixth gear 214 and the seventh gear 217, and the third moving gear sleeve 223 connects to the eleventh gear 222 and the second fixed engagement gear 232, it is in gear 2. The fourth shaft 212, the second sun gear 228, the second planetary gear 213, the sixth gear 214, the second moving gear sleeve 216, the seventh gear 217, the eighth gear 218, the ninth gear 219, the third sun gear 231, the third planetary gear 224, the third gear ring 225, the twelfth gear 226, the thirteenth gear 227, and the differential 122 transmit power to the half shaft 123.

[0144] When the second moving sleeve 216 connects the second planetary carrier 215 and the seventh gear 217, and the third moving sleeve 223 connects the eleventh gear 222 and the tenth gear 221, it is in gear 3. The fourth shaft 212, the second sun gear 228, the second planetary gear 213, the second planetary carrier 215, the second moving sleeve 216, the seventh gear 217, the eighth gear 218, the ninth gear 219, the tenth gear 221, the third planetary carrier 230, the third ring gear 225, the twelfth gear 226, the thirteenth gear 227, and the differential 122 transmit power to the half shaft 123.

[0145] When the second moving sleeve 216 connects to the sixth gear 214 and the seventh gear 217, and the third moving sleeve 223 connects to the eleventh gear 222 and the tenth gear 221, it is in gear 4. The fourth shaft 212, the second sun gear 228, the second planet gear 213, the second planet carrier 215, the second moving sleeve 216, the seventh gear 217, the eighth gear 218, the ninth gear 219, the tenth gear 221, the third planet carrier 230, the third ring gear 225, the twelfth gear 226, the thirteenth gear 227, and the differential 122 transmit power to the half shaft 123.

[0146] The second moving gear sleeve 216 is not connected to either the sixth gear 214 or the second planetary carrier 215, and the second moving gear sleeve 216 interrupts the transmission of power. The third moving gear sleeve 223 is not connected to either the tenth gear 221 or the second fixed engagement gear 232, and the transmission of power is interrupted. When at least one of the second moving gear sleeve 216 and the third moving gear sleeve 223 interrupts the transmission of power, it is in neutral and no power is transmitted.

[0147] The first motor assembly 111 of the middle axle electric drive axle 11 and the first power transmission component 110, with their five gears (1st gear, 2nd gear, 3rd gear, 4th gear and neutral gear) combined in pairs, form twenty-four operating conditions.

[0148] In this embodiment, the twenty-four operating conditions of the middle axle electric drive axle assembly 11 and the rear axle electric drive axle assembly 12 are as follows:

[0149]

[0150] In the above embodiments, torque and speed are adjusted by planetary components. Planetary components themselves have the characteristics of small size and good transmission effect. By designing a toggle connection mechanism to change the fixing and connection method of the components of the planetary components, the gear adjustment function of the planetary components is realized. The number of gears is increased and the gear adjustment range is expanded by using a series planetary reduction structure.

[0151] Working principle: The first embodiment uses the first power transmission component 110 to provide power. The first power transmission component 110 has three gears including neutral. The middle axle electric drive bridge 11 and the rear axle electric drive bridge 12 can be adjusted to different gears. Excluding the case where all gears are in neutral, a total of eight working conditions are generated.

[0152] The second embodiment uses a second power transmission assembly 120 to provide power. The second power transmission assembly 120 has five gears, including neutral. The middle axle electric drive bridge 11 and the rear axle electric drive bridge 12 can be adjusted to different gears. Excluding the case where all gears are in neutral, a total of twenty-four operating conditions are generated.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electric drive axle assembly equipped with a multi-ratio transmission, characterized in that, include: The middle axle electric drive axle (11) and the rear axle electric drive axle (12) are both fixedly mounted on the chassis of the electric drive vehicle; The middle axle electric drive bridge (11) and the rear axle electric drive bridge (12) have the same structure, both including a first motor assembly (111) and a first power transmission assembly (110). Half shaft (123), the first motor assembly (111) transmits power to half shaft (123) through the first power transmission component (110); The middle axle electric drive axle (11) and the rear axle electric drive axle (12) are simultaneously matched with a first motor assembly (111) and a first power transmission assembly (110) on one side. The middle axle electric drive bridge (11) and the rear axle electric drive bridge (12) each have three gears, which work together to form eight working conditions; The first power transmission assembly (110) includes: The first shaft (112) is fixedly connected to the output end of the first motor assembly (111); A first gear (113) is fixedly mounted on the first shaft (112); The second shaft (115) is fixedly mounted with a second gear (114), and the second gear (114) meshes with the first gear (113); The third shaft (117) is fixedly equipped with a third gear (116) and a fourth gear (118), and the third gear (116) meshes with the second gear (114); The fifth gear (119) meshes with the fourth gear (118). The fifth gear (119) is fixedly connected to the first sun gear (126). The fifth gear (119) is equipped with the first sun gear (126), the first planet gear (125), and the first planet carrier (127) to transmit power to the half shaft (123). The first gear ring (121), the first movable gear sleeve (124) and the first fixed engagement tooth (128) are assembled on the first gear ring (121). The first movable gear sleeve (124) can be selectively connected to the first fixed engagement tooth (128) and connected to the first planetary carrier (127). A differential (122) is fixedly connected to a first planetary carrier (127), and the output end of the differential (122) is fixedly connected to the half shaft (123).

2. An electric drive axle assembly with a multi-speed transmission according to claim 1, characterized in that When the first movable gear sleeve (124) is connected to the first fixed engagement gear (128), it is in gear 1. The first motor assembly (111) transmits power to the half shaft (123) in sequence through the first shaft (112), the first gear (113), the second gear (114), the second shaft (115), the third gear (116), the third shaft (117), the fourth gear (118), the fifth gear (119), the first sun gear (126), the first planetary gear (125), the first planetary carrier (127), and the differential (122). When the first movable gear sleeve (124) is connected to the first planetary carrier (127), it is in gear 2. At this time, the first movable gear sleeve (124) fixes the first gear ring (121) and the first planetary carrier (127) into one unit. The first motor assembly (111) transmits power to the half shaft (123) in sequence through the first shaft (112), the first gear (113), the second gear (114), the second shaft (115), the third gear (116), the third shaft (117), the fourth gear (118), the fifth gear (119), the first sun gear (126), the first planetary gear (125), the first planetary carrier (127), and the differential (122). The first movable gear sleeve (124) is not connected to either the first planetary carrier (127) or the first fixed engagement gear (128), and is in neutral at this time, so no power is transmitted. The first motor assembly (111) and the first power transmission component (110) of the middle bridge electric drive axle (11) and the rear bridge electric drive axle (12) are combined in pairs to form eight working conditions.

3. An electric drive axle assembly having a multi-speed transmission according to claim 2, characterized in that The eight operating conditions of the middle axle electric drive bridge (11) and the rear axle electric drive bridge (12) are as follows: The middle axle electric drive bridge (11) is in first gear, and the rear axle electric drive bridge (12) is in first gear; The middle axle electric drive bridge (11) is in first gear, and the rear axle electric drive bridge (12) is in second gear; The middle axle electric drive bridge (11) is in first gear, and the rear axle electric drive bridge (12) is in neutral. The middle axle electric drive bridge (11) is in second gear, and the rear axle electric drive bridge (12) is in first gear; Middle bridge electric drive axle (11) second gear, rear bridge electric drive axle (12) second gear; Middle bridge electric drive axle (11) second gear, rear bridge electric drive axle (12) neutral gear; The middle axle electric drive bridge (11) is in neutral, and the rear axle electric drive bridge (12) is in first gear; Middle bridge electric drive bridge (11) in neutral, rear bridge electric drive bridge (12) in second gear.

4. An electric drive axle assembly having a multi-speed transmission according to claim 2, characterized in that, The first motor assembly (111) and the first power transmission component (110) on one side of the middle axle electric drive axle (11) and the rear axle electric drive axle (12) are simultaneously replaced by the second motor assembly (211) and the second power transmission component (120), and the second motor assembly (211) transmits power to the half shaft (123) through the second power transmission component (120). The second power transmission assembly (120) includes: The fourth shaft (212) is fixedly connected to the output end of the second motor assembly (211); The second sun gear (228) and the sixth gear (214) are fixedly mounted on the fourth shaft (212). The second planetary carrier (215), the seventh gear (217) and the eighth gear (218) are rotatably connected on the fourth shaft (212), and the seventh gear (217) and the eighth gear (218) are fixedly connected; The second planetary gear (213), the second sun gear (228) transmits power to the second planetary carrier (215) through the second planetary gear (213); The second movable gear sleeve (216) is assembled onto the seventh gear (217). The second movable gear sleeve (216) can optionally connect to the sixth gear (214) and the second planetary carrier (215). The ninth gear (219) meshes with the eighth gear (218); The fifth shaft (220) is fixedly equipped with the tenth gear (221) and the third sun gear (231). The fifth shaft (220) is rotatably connected to the eleventh gear (222), the third planetary carrier (230), the third gear ring (225), and the twelfth gear (226), and the eleventh gear (222) and the third planetary carrier (230) are fixedly connected, and the third gear ring (225) and the twelfth gear (226) are fixedly connected; The third movable gear sleeve (223) is assembled onto the eleventh gear (222), and the third movable gear sleeve (223) can be selectively connected to the tenth gear (221) and the second fixed engagement gear (232). The third planetary gear (224), the third sun gear (231) transmits power to the twelfth gear (226) through the third planetary gear (224) and the third ring gear (225); The thirteenth gear (227) transmits power to the differential (122) via the twelfth gear (226).

5. The electric drive axle assembly equipped with a multi-speed transmission according to claim 4, characterized in that, When the second movable gear sleeve (216) connects the second planetary carrier (215) and the seventh gear (217), and the third movable gear sleeve (223) connects the eleventh gear (222) and the second fixed engagement gear (232), it is in gear 1. The fourth shaft (212), the second sun gear (228), the second planetary gear (213), the second planetary carrier (215), the second movable gear sleeve (216), the seventh gear (217), the eighth gear (218), the ninth gear (219), the third sun gear (231), the third planetary gear (224), the third gear ring (225), the twelfth gear (226), the thirteenth gear (227), and the differential (122) transmit power to the half shaft (123). When the second movable gear sleeve (216) connects the sixth gear (214) and the seventh gear (217), and the third movable gear sleeve (223) connects the eleventh gear (222) and the second fixed engagement gear (232), it is in gear 2. The fourth shaft (212), the second sun gear (228), the second planetary gear (213), the sixth gear (214), the second movable gear sleeve (216), the seventh gear (217), the eighth gear (218), the ninth gear (219), the third sun gear (231), the third planetary gear (224), the third gear ring (225), the twelfth gear (226), the thirteenth gear (227), and the differential (122) transmit power to the half shaft (123). When the second movable gear sleeve (216) connects the second planetary carrier (215) and the seventh gear (217), and the third movable gear sleeve (223) connects the eleventh gear (222) and the tenth gear (221), it is in gear 3. The fourth shaft (212), the second sun gear (228), the second planetary gear (213), the second planetary carrier (215), the second movable gear sleeve (216), the seventh gear (217), the eighth gear (218), the ninth gear (219), the tenth gear (221), the third planetary carrier (230), the third gear ring (225), the twelfth gear (226), the thirteenth gear (227), and the differential (122) transmit power to the half shaft (123). The second moving gear sleeve (216) connects the sixth gear (214) and the seventh gear (217), and the third moving gear sleeve (223) connects the eleventh gear (222) and the tenth gear (221). At this time, it is the fourth gear. The fourth shaft (212), the second sun gear (228), the second planet gear (213), the second planet carrier (215), the second moving gear sleeve (216), the seventh gear (217), the eighth gear (218), the ninth gear (219), the tenth gear (221), the third planet carrier (230), the third gear ring (225), the twelfth gear (226), the thirteenth gear (227), and the differential (122) transmit power to the half shaft (123). The second moving gear sleeve (216) is not connected to either the sixth gear (214) or the second planetary carrier (215), and the second moving gear sleeve (216) interrupts the transmission of power. The third moving gear sleeve (223) is not connected to either the tenth gear (221) or the second fixed engagement gear (232), and the transmission of power is interrupted. When at least one of the second moving gear sleeve (216) and the third moving gear sleeve (223) interrupts the transmission of power, it is in neutral and no power is transmitted. The five gears of the first motor assembly (111) and the first power transmission component (110) of the middle bridge electric drive axle (11) and the rear bridge electric drive axle (12) are combined in pairs to form twenty-four operating conditions.

6. An electric drive axle assembly having a multi-speed transmission according to claim 3, characterized in that, The twenty-four operating conditions of the middle axle electric drive bridge (11) and the rear axle electric drive bridge (12) are as follows: The middle axle electric drive bridge (11) is in first gear, and the rear axle electric drive bridge (12) is in first gear; The middle axle electric drive bridge (11) is in first gear, and the rear axle electric drive bridge (12) is in second gear; The middle axle electric drive bridge (11) is in first gear, and the rear axle electric drive bridge (12) is in third gear; The middle axle electric drive bridge (11) is in first gear, and the rear axle electric drive bridge (12) is in fourth gear; The middle axle electric drive bridge (11) is in first gear, and the rear axle electric drive bridge (12) is in neutral. The middle axle electric drive bridge (11) is in second gear, and the rear axle electric drive bridge (12) is in first gear; Middle bridge electric drive axle (11) second gear, rear bridge electric drive axle (12) second gear; The middle axle electric drive bridge (11) is in second gear, and the rear axle electric drive bridge (12) is in third gear; The middle axle electric drive bridge (11) is in second gear, and the rear axle electric drive bridge (12) is in fourth gear; Middle bridge electric drive axle (11) second gear, rear bridge electric drive axle (12) neutral gear; The middle axle electric drive bridge (11) is in third gear, and the rear axle electric drive bridge (12) is in first gear; The middle axle electric drive bridge (11) has three gears, and the rear axle electric drive bridge (12) has two gears; The middle axle electric drive bridge (11) has three gears, and the rear axle electric drive bridge (12) has three gears; The middle axle electric drive bridge (11) has three gears, and the rear axle electric drive bridge (12) has four gears; Middle bridge electric drive axle (11) in third gear, rear bridge electric drive axle (12) in neutral; The middle axle electric drive bridge (11) is in fourth gear, and the rear axle electric drive bridge (12) is in first gear; The middle axle electric drive bridge (11) has four gears, and the rear axle electric drive bridge (12) has two gears; The middle axle electric drive bridge (11) has four gears, and the rear axle electric drive bridge (12) has three gears; The middle axle electric drive bridge (11) has four gears, and the rear axle electric drive bridge (12) has four gears; The middle bridge electric drive axle (11) is in fourth gear, and the rear bridge electric drive axle (12) is in neutral. The middle axle electric drive bridge (11) is in neutral, and the rear axle electric drive bridge (12) is in first gear; Middle axle electric drive bridge (11) in neutral, rear axle electric drive bridge (12) in second gear; The middle axle electric drive bridge (11) is in neutral, and the rear axle electric drive bridge (12) is in third gear; The middle axle electric drive bridge (11) is in neutral, and the rear axle electric drive bridge (12) is in fourth gear.

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