Electric drive axle structure and vehicle with same

Abstract

The invention provides an electric drive axle structure and a vehicle with the electric drive axle structure, the electric drive axle structure comprises an electric drive axle shell and two driving structures arranged in the electric drive axle shell, and the two driving structures are used for being correspondingly connected with a left driving wheel and a right driving wheel of the vehicle respectively. Each driving structure comprises a first planet row, a second planet row, a first gear shifting assembly, a second gear shifting assembly and a driving motor; the first planet row is connected with the second planet row through the first gear shifting assembly and the second gear shifting assembly so that four-gear connection can be formed between the first planet row and the second planet row. The output end of the driving motor is connected with the first planet row so as to be used for inputting power to the first planet row and outputting the power to the left driving wheel and the right driving wheel through the second planet row. The problem that an electric drive axle structure in the prior art is difficult to meet the large output torque requirement of the wheel end of a heavy vehicle is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of drive axles, and in particular to an electric drive axle structure and a vehicle having the same. Background Art

[0002] At present, with the innovation and popularization of new energy technologies, the drive axle, as a key component connecting the motor and the wheel, faces unprecedented challenges in its structural design. Especially in the field of heavy-duty vehicles, the market has increasingly stringent requirements on the integration, high speed ratio and volume power density of electric drive axles to meet the dual needs of heavy-duty vehicles for high torque and high efficiency under complex working conditions. The prior art provides a three-speed electric drive axle architecture that can meet the power transmission requirements of the vehicle to a certain extent.

[0003] However, with the rapid development of new energy technologies, the application of electric drive axle systems in the field of commercial vehicles is becoming more and more extensive, and the market demand for the integration, large speed ratio and high volume power density of electric drive axles is increasing. The first gear ratio design of this existing technology is relatively small, resulting in the inability of the wheel end to obtain sufficient large output torque in heavy-duty vehicle applications. In order to meet the power requirements of the wheel end, the cost has to be increased to select expensive high-performance motors. This not only increases the overall cost of the system, but also brings challenges to the selection and integration of the motor. In addition, the limitations of the power flow path and the shifting strategy limit its economy and efficiency under different working conditions, making it difficult to achieve the best balance between power and economy. Summary of the invention

[0004] The main purpose of the present invention is to provide an electric drive axle structure and a vehicle having the same, so as to solve the problem that the electric drive axle structure in the prior art is difficult to meet the large output torque demand of the wheel end of a heavy vehicle.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, an electric drive axle structure is provided, including an electric drive axle housing and two drive structures arranged therein, the two drive structures are respectively used to be connected to the left drive wheel and the right drive wheel of the vehicle, and each drive structure includes: a first planetary gear and a second planetary gear; a first shift assembly and a second shift assembly, the first planetary gear is connected to the second planetary gear through the first shift assembly and the second shift assembly respectively, so that four gear positions are formed between the first planetary gear and the second planetary gear; a drive motor, the output end of the drive motor is connected to the first planetary gear for inputting power to the first planetary gear, and outputting power to the left drive wheel and the right drive wheel through the second planetary gear.

[0006] Furthermore, each driving structure also includes: a first switching component, including a first switching component A, a first switching component B, a first switching component C, a first switching component D and a first switching component E, the first switching component A is the electric drive axle housing, the first switching component B is the second planetary carrier shaft of the second planetary row, the first switching component C is the second sun gear shaft of the second planetary row, the first switching component D is the first planetary carrier shaft of the first planetary row, and the first switching component E is the first sun gear shaft of the first planetary row.

[0007] Furthermore, the first gear shift assembly includes: a first motor; a first gear shift sleeve, connected to the output end of the first motor, and two first connecting parts are respectively provided on the first gear shift sleeve, so that the first motor drives the first gear shift sleeve to drive the two first connecting parts to be connected to corresponding two of the first switching member A, the first switching member B, the first switching member C, the first switching member D and the first switching member E respectively.

[0008] Furthermore, two first spline teeth are respectively provided on the inner surface of the first shift sleeve at the two first connecting parts, so as to respectively engage with the first external splines on the first switching member A, the first switching member B, the first switching member C, the first switching member D and the first switching member E.

[0009] Furthermore, each drive structure also includes: a second switching component, including a second switching component a, a second switching component b and a second switching component c, the second switching component a is the electric drive axle housing, the second switching component b is the first planetary carrier shaft of the first planetary gear, and the second switching component c is the second ring gear shaft of the second planetary gear.

[0010] Furthermore, the second shift assembly includes: a second motor; a second shift sleeve connected to the output end of the second motor, and two second connecting parts are respectively provided on the second shift sleeve, so that the second motor drives the second shift sleeve to drive the two second connecting parts to be connected to corresponding two of the second switching element a, the second switching element b and the second switching element c respectively.

[0011] Furthermore, second spline teeth are respectively provided on the inner surfaces of the second shift sleeve at the two second connecting portions, so as to be respectively engaged with the second external splines on the second switching member a, the second switching member b and the second switching member c.

[0012] Furthermore, the electric drive axle structure also includes: a differential, which is arranged in the electric drive axle housing, and the second planetary carrier shafts of the two second planetary gears are respectively connected to the differential, and the differential is respectively connected to the left drive wheel and the right drive wheel through two half shafts, so that the power output by the two second planetary gears is transmitted to the left drive wheel and the right drive wheel respectively after being decelerated by the differential.

[0013] Furthermore, the first planetary gear includes: a first ring gear, the first ring gear is connected to a first ring gear shaft, and the first ring gear shaft is connected to the electric drive axle housing; a first planetary gear is meshed with the first ring gear; a first planetary carrier, the first planetary gear is arranged on the first planetary carrier, and the first planetary carrier shaft is passed through the first planetary carrier, and the first planetary carrier shaft is used to be connected to the first shift assembly and the second shift assembly respectively; a first sun gear is meshed with the first planetary gear, and the first sun gear shaft is passed through the first sun gear, and the first sun gear shaft is connected to the output end of the drive motor and is used to be connected to the first shift assembly.

[0014] Furthermore, the second planetary gear includes: a second ring gear, the second ring gear is connected to a second ring gear shaft, and the second ring gear shaft is used to connect to the second gear shift assembly; a second planetary gear, meshingly connected with the second ring gear; a second planetary carrier, the second planetary gear is arranged on the second planetary carrier, and the second planetary carrier shaft is passed through the second planetary carrier, and the second planetary carrier shaft is used to connect to the first gear shift assembly; a second sun gear, meshingly connected with the second planetary gear, and the second sun gear shaft is passed through the second sun gear, and the second sun gear shaft is used to connect to the first gear shift assembly.

[0015] According to another aspect of the present invention, a vehicle is provided, comprising an electric drive axle structure, wherein the electric drive axle structure is the electric drive axle structure mentioned above.

[0016] By applying the technical solution of the present invention, an electric drive axle structure is provided, including an electric drive axle housing and two drive structures arranged therein, the two drive structures are respectively used to be connected to the left drive wheel and the right drive wheel of the vehicle, and each drive structure includes a first planetary row, a second planetary row, a first shift assembly, a second shift assembly and a drive motor; the first planetary row is connected to the second planetary row through the first shift assembly and the second shift assembly respectively, so that four gear connections are formed between the first planetary row and the second planetary row; the output end of the drive motor is connected to the first planetary row for inputting power to the first planetary row, and outputting power to the left drive wheel and the right drive wheel through the second planetary row.

[0017] In this way, through the cooperation of the first shift assembly and the second shift assembly, four gear connections can be formed between the first planetary gear and the second planetary gear, so that the electric drive axle can provide a wider speed ratio range, can better balance power and economy, reduce the requirements for motor performance, and provide vehicles with more flexible and efficient power transmission under different working conditions to meet the needs of large output torque at the wheel end of heavy commercial vehicles, thereby solving the problem that the electric drive axle structure in the prior art is difficult to meet the large output torque requirements of the wheel end of heavy vehicles. In addition, by integrating the two drive structures into a coaxial structure in a single electric drive axle housing, and by using the first planetary gear and the second planetary gear in combination, not only the structure of the electric drive axle is simplified, but also the compactness of the system is effectively improved, which is conducive to the layout optimization and space utilization of the vehicle chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A first structural schematic diagram provided according to an embodiment of the electric drive bridge structure of the present invention is shown;

[0020] Figure 2 A second structural schematic diagram provided according to an embodiment of the electric drive bridge structure of the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 1. First switching element A; 2. First switching element B; 3. First switching element C; 4. First switching element D; 5. First switching element E; 6. Second switching element a; 7. Second switching element b; 8. Second switching element c;

[0023] 10. Electric drive axle housing; 11. Drive motor;

[0024] 20. Driving structure; 21. Left driving wheel; 22. Right driving wheel;

[0025] 30. first planetary gear; 31. first ring gear; 32. first planetary gear; 33. first planetary carrier; 330. first planetary carrier shaft; 34. first sun gear; 340. first sun gear shaft;

[0026] 40, second planetary gear; 41, second ring gear; 410, second ring gear shaft; 42, second planetary gear; 43, second planet carrier; 430, second planet carrier shaft; 44, second sun gear; 440, second sun gear shaft;

[0027] 50. first gear shift assembly; 51. first motor; 52. first gear shift sleeve; 520. first connecting portion;

[0028] 60. Second gear shift assembly; 61. Second motor; 62. Second gear shift sleeve; 620. Second connecting portion; 70. Differential. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] In order to solve the problem that the electric drive axle structure in the prior art is difficult to meet the large output torque requirement of the wheel end of a heavy vehicle, the present invention provides an electric drive axle structure and a vehicle having the same.

[0031] Please refer to Figure 1 As shown, one aspect of the technical solution of the present invention provides an electric drive axle structure, including an electric drive axle housing 10 and two drive structures 20 arranged therein, the two drive structures 20 are respectively used to be connected to the left drive wheel 21 and the right drive wheel 22 of the vehicle, and each drive structure 20 includes a first planetary row 30, a second planetary row 40, a first shift assembly 50, a second shift assembly 60 and a drive motor 11; the first planetary row 30 is connected to the second planetary row 40 through the first shift assembly 50 and the second shift assembly 60, respectively, so that four gear connections are formed between the first planetary row 30 and the second planetary row 40; the output end of the drive motor 11 is connected to the first planetary row 30, so as to input power to the first planetary row 30, and output power to the left drive wheel 21 and the right drive wheel 22 through the second planetary row 40.

[0032] In one aspect of the technical solution of the present invention, through the cooperation of the first shift assembly 50 and the second shift assembly 60, four gear positions can be formed between the first planetary gear 30 and the second planetary gear 40, so that the electric drive bridge can provide a wider speed ratio range, can better balance power and economy, reduce the requirements for motor performance, and provide more flexible and efficient power transmission for the vehicle under different working conditions to meet the large output torque requirements of the wheel end of heavy commercial vehicles, thereby solving the problem that the electric drive bridge structure in the prior art is difficult to meet the large output torque requirements of the wheel end of heavy vehicles. In addition, by integrating the two drive structures 20 into the coaxial structure in the single electric drive bridge housing 10, through the combined use of the first planetary gear 30 and the second planetary gear 40, not only the structure of the electric drive bridge is simplified, but also the compactness of the system is effectively improved, which is conducive to the layout optimization and space utilization of the vehicle chassis.

[0033] In this embodiment, the drive motor 11 is a high-torque, high-power motor with a certain hollowness; the first planetary row 30 and the second planetary row 40 are both NWG planetary rows; the sun gear shafts of the first planetary row 30 and the second planetary row 40 are both constructed as hollow shafts, and the first planetary carrier shaft 330 of the first planetary row 30, the second sun gear shaft 440 and the second planetary carrier shaft 430 of the second planetary row 40 all pass through the first sun gear shaft 340 of the first planetary row 30.

[0034] like Figure 1As shown, each driving structure 20 also includes a first switching component, which includes a first switching member A1, a first switching member B2, a first switching member C3, a first switching member D4 and a first switching member E5; the first switching member A1 is the electric drive bridge housing 10, the first switching member B2 is the second planetary carrier shaft 430 of the second planetary row 40, the first switching member C3 is the second sun gear shaft 440 of the second planetary row 40, the first switching member D4 is the first planetary carrier shaft 330 of the first planetary row 30, and the first switching member E5 is the first sun gear shaft 340 of the first planetary row 30. In this way, the first planetary row 30 and the second planetary row 40 inside the electric drive bridge are connected through different switching members, which can realize a more complex power transmission path and shifting mode. It helps the vehicle to achieve the best power distribution and torque output under various driving conditions, improves the driving experience and the overall performance of the vehicle, and then can select the best gear according to the real-time operating state and driving needs of the vehicle to improve the efficiency and economy of power output.

[0035] Specifically, the first shift assembly 50 includes a first motor 51 and a first shift sleeve 52; the first shift sleeve 52 is connected to the output end of the first motor 51, and two first connecting parts 520 are respectively provided on the first shift sleeve 52, so that the first motor 51 drives the first shift sleeve 52 to drive the two first connecting parts 520 to respectively connect with the corresponding two of the first switching member A1, the first switching member B2, the first switching member C3, the first switching member D4 and the first switching member E5. In this way, through the switching of the two first connecting parts 520 on the first shift sleeve 52, the first planetary gear 30 and the second planetary gear 40 are coupled to each other with different transmission paths, so that the power transmission path can be flexibly selected according to the real-time needs of the vehicle, thereby reducing energy loss and improving power transmission efficiency, especially in heavy-duty vehicle applications requiring high torque output.

[0036] Specifically, two first spline teeth are respectively provided on the inner surface of the first shift sleeve 52 at the two first connecting parts 520, so as to respectively mesh with the first external splines on the first switching member A1, the first switching member B2, the first switching member C3, the first switching member D4 and the first switching member E5. In order to realize different power couplings between the first planetary gear 30 and the second planetary gear 40. In this way, through the meshing of the spline teeth and the external splines, the first shift sleeve 52 can be accurately connected with different first switching members to ensure the accuracy and reliability of the gear shift. Compared with other forms of connection, this mechanical connection method provides a more stable and direct power transmission path. Through the connection of the first shift sleeve 52, different power coupling connection modes between the first planetary gear 30 and the second planetary gear 40 can be more intuitively realized, and the power can be accurately transmitted from the first planetary gear 30 to the second planetary gear 40. It can also distribute power under different speed ratios, thereby improving the adaptability and efficiency of the electric drive axle under complex working conditions.

[0037] like Figure 1 As shown, each drive structure 20 also includes a second switching assembly, which includes a second switching member a6, a second switching member b7 and a second switching member c8; the second switching member a6 is the electric drive axle housing 10, the second switching member b7 is the first planetary carrier shaft 330 of the first planetary gear 30, and the second switching member c8 is the second ring gear shaft 410 of the second planetary gear 40. In this way, the second switching assembly provides an additional power path selection, which can intelligently switch the transmission path of power from the drive motor 11 to the wheel according to the actual working conditions of the vehicle. In combination with the first shift sleeve 52, the two second connecting parts 620 of the second shift sleeve 62 are controlled to be connected with different second switching members, and the electric drive axle can realize power transmission with different speed ratios, thereby reducing the requirements and design for the performance of the drive motor 11, and improving the driving efficiency while ensuring the vehicle's power performance.

[0038] Specifically, the second shift assembly 60 includes a second motor 61 and a second shift sleeve 62; the second shift sleeve 62 is connected to the output end of the second motor 61, and two second connecting parts 620 are respectively provided on the second shift sleeve 62, so that the second motor 61 drives the second shift sleeve 62 to drive the two second connecting parts 620 to respectively connect with the corresponding two of the second switching member a6, the second switching member b7 and the second switching member c8. In this way, the plurality of second switching members respectively correspond to the structures in the first planetary gear 30 and the second planetary gear 40, so that the two second connecting parts 620 on the second shift sleeve 62 are selectively connected with two of the second switching members, so that the electric drive axle can intelligently switch the connection state according to the driving requirements of the vehicle, realize the power transmission path of multiple speed ratios, and improve flexibility.

[0039] Specifically, the second shift sleeve 62 is provided with second spline teeth on the inner surface of the two second connecting parts 620, respectively, for meshing with the second external spline on the second switching member a6, or the second switching member b7 or the second switching member c8, so as to realize different power couplings between the first planetary gear 30 and the second planetary gear 40. In this way, the second spline teeth are meshed with the second external spline, which ensures the accuracy and stability of the second shift sleeve 62 in connecting with different second switching members when switching the power path. This precise mechanical connection method reduces unnecessary energy loss in the power transmission process and improves the transmission efficiency. At the same time, it helps to optimize the internal structure layout of the entire electric drive axle, making it more compact, reducing space occupation, and facilitating vehicle chassis design and installation.

[0040] According to the architecture design of this application, the functions of different gears are implemented as follows:

[0041] Gear First shift sleeve Second shift sleeve 1st gear C.D a.c 2nd gear A.C b.c 3rd gear C.E b.c 4th gear B.E Neutral

[0042] In the first gear, the two first connecting parts 520 of the first shift sleeve 52 interlock the first switching member C3 and the first switching member D4, that is, the first planetary carrier shaft 330 is interlocked with the second sun gear shaft 440. The two second connecting parts 620 of the second shift sleeve 62 interlock the second switching member a6 and the second switching member c8, that is, the second ring gear shaft 410 is connected and fixed with the electric drive axle housing 10. After the output power of the drive motor 11 is decelerated by the first planetary row 30, the power is output from the first planetary carrier shaft 330 to the second sun gear shaft 440. After being decelerated by the second planetary row 40, the second planetary carrier shaft 430 is used as an output to output the power to the differential 70. The power output of the differential 70 is decelerated by the wheel sides on both sides to the left drive wheel 21 and the right drive wheel 22. At this point, the power flow transmission in the first gear is completed, thereby achieving a large speed ratio in the first gear, which can reduce the performance requirements of the drive motor 11 under the condition of meeting the wheel end power.

[0043] In the second gear, the two first connecting parts 520 of the first shift sleeve 52 interlock the first switching member A1 and the first switching member C3, the second sun gear shaft 440 is fixedly connected to the electric drive axle housing 10, and the second sun gear shaft 440 is constrained. The two second connecting parts 620 of the second shift sleeve 62 interlock the second switching member b7 and the second switching member c8, and the power of the first planetary carrier shaft 330 is output to the second ring gear shaft 410. The second ring gear 41 of the second planetary row 40 is used as input, the second sun gear 44 is fixed, and the second planetary carrier 43 is used as output. After the power of the drive motor 11 is decelerated by the first planetary row 30 and the second planetary row 40, the power is output by the second planetary carrier shaft 430 to the differential 70, and then through the wheel side deceleration, finally to the left drive wheel 21 and the right drive wheel 22, so that the power flow transmission in the second gear is completed.

[0044] In the third gear, the two first connections of the first shift sleeve 52 interlock the first switching element C3 and the second switching element E, and the power of the drive motor 11 is simultaneously output to the first sun gear shaft 340 and the second sun gear shaft 440. The two second connection parts 620 of the second shift sleeve 62 interlock the second switching element b7 and the second switching element c8, and the power output of the first planetary carrier shaft 330 is used as the input of the second ring gear shaft 410. At this time, the second planetary gear row 40 has two power inputs: the second sun gear shaft 440 and the second ring gear shaft 410; the second planetary carrier shaft 430 is used as the output. In this case, through the combined interlocking and power coupling of different moving parts, the first planetary gear row 30 and the second planetary gear row 40 are interconnected to achieve a single speed ratio output. Finally, the power is output to the differential 70 through the second planetary carrier shaft 430, and then transmitted to the left drive wheel 21 and the right drive wheel 22 through wheel-side reduction.

[0045] In the fourth gear, the two first connecting parts 520 of the first shift sleeve 52 interlock the first switching member B2 and the first switching member E5, and the two second connecting parts 620 of the second shift sleeve 62 are in the neutral position. At this time, the first planetary gear 30 and the second planetary gear 40 do not participate in the power transmission, and the power of the drive motor 11 is directly output to the differential 70, and then the power is transmitted to the left drive wheel 21 and the right drive wheel 22 after wheel-side reduction.

[0046] like Figure 1 As shown, the electric drive axle structure also includes a differential 70, which is arranged in the electric drive axle housing 10, and the second planetary carrier shafts 430 of the two second planetary gears 40 are respectively connected to the differential 70, and the differential 70 is respectively connected to the left drive wheel 21 and the right drive wheel 22 through two half shafts, so that the power output by the two second planetary gears 40 is transmitted to the left drive wheel 21 and the right drive wheel 22 respectively after being decelerated by the differential 70. In this way, the differential 70 can automatically adjust and distribute the power output from the second planetary gear 40 according to the difference in friction between the left drive wheel 21 and the right drive wheel 22 of the vehicle and the ground, ensuring that when turning or one side of the wheel slips, the other side of the wheel can obtain sufficient torque to maintain the stability and controllability of the vehicle. Through the deceleration effect of the differential 70, the power output by the second planetary gear 40 can be further optimized to adapt to the torque requirements of the vehicle under different working conditions, especially when driving at low speed or climbing, it can provide greater torque and improve the driving efficiency.

[0047] In another embodiment of the present application, Figure 2 As shown, the design of the differential 70 is cancelled, the second switching member a6 is the first planetary carrier shaft 330 of the first planetary gear set 30, the second switching member b7 is the second ring gear shaft 410 of the second planetary gear set 40, and the second switching member c8 is the electric drive axle housing 10. The differential function can be realized through the vehicle strategy, thereby optimizing the layout space and design cost.

[0048] In this embodiment, the first planetary gear 30 includes a first ring gear 31, a first planetary gear 32, a first planetary carrier 33 and a first sun gear 34; the first ring gear 31 is connected to a first ring gear shaft, and the first ring gear shaft is connected to the electric drive axle housing 10; the first planetary gear 32 is meshed with the first ring gear 31; the first planetary gear 32 is arranged on the first planetary carrier 33, and the first planetary carrier shaft 330 is passed through the first planetary carrier 33, and the first planetary carrier shaft 330 is used to be connected to the first shift assembly 50 and the second shift assembly 60 respectively; the first sun gear 34 is meshed with the first planetary gear 32, and the first sun gear shaft 340 is passed through the first sun gear 34, and the first sun gear shaft 340 is connected to the output end of the drive motor 11 and is used to be connected to the first shift assembly 50. With the above arrangement, the first planetary gear 30 can efficiently convert and transmit power at different speed ratios. When the first sun gear 34 is used as power input and the first planetary carrier 33 is used as output, the effect of speed reduction and torque increase can be achieved; conversely, when the first planetary carrier 33 is used as input and the first sun gear 34 is used as output, the effect of speed increase and torque reduction can be achieved, thereby adapting to different driving conditions. In addition, the compact design of the first planetary gear 30 enables it to be closely integrated with other components such as the electric drive axle housing 10 and the drive motor 11, reducing space occupation and facilitating the overall layout of the electric drive axle and the design optimization of the vehicle chassis.

[0049] In this embodiment, the second planetary gear 40 includes a second ring gear 41, a second planetary gear 42, a second planetary carrier 43 and a second sun gear 44; the second ring gear 41 is connected to a second ring gear shaft 410, and the second ring gear shaft 410 is used to connect with the second shift assembly 60; the second planetary gear 42 is meshed with the second ring gear 41; the second planetary gear 42 is arranged on the second planetary carrier 43, and the second planetary carrier 43 is provided with a second planetary carrier shaft 430, and the second planetary carrier shaft 430 is used to connect with the first shift assembly 50; the second sun gear 44 is meshed with the second planetary gear 42, and the second sun gear 44 is provided with a second sun gear shaft 440, and the second sun gear shaft 440 is used to connect with the first shift assembly 50. In the above arrangement, the second planetary carrier shaft 430 is connected to the first shift assembly 50, and the second ring gear shaft 410 is connected to the second shift assembly 60, so that the power can be divided between the two planetary gears. Under certain working conditions, part of the power can be directly transmitted to the differential 70 through the second planetary gear 40, and the other part of the power is converted through additional gears, providing a more flexible driving mode for the vehicle. At the same time, the second planetary gear 40 is compactly integrated in the electric drive axle housing 10, and closely cooperates with the first planetary gear 30, the differential 70, the shift assembly, etc., reducing additional transmission devices, making the entire drive axle system more compact, which is conducive to the layout optimization of the vehicle chassis, while reducing weight and improving the vehicle's handling and fuel economy.

[0050] Another aspect of the technical solution of the present invention provides a vehicle, including the electric drive axle structure mentioned above. In this way, the electric drive axle structure can intelligently adjust the power flow path according to the driving state of the vehicle, so that the drive motor 11 can maintain efficient operation in different gears, reduce unnecessary energy loss, improve energy utilization efficiency, extend the driving mileage of a single charge, and reduce operating costs. In addition, it can provide additional deceleration and torque increase effects when the vehicle needs a large torque output, significantly enhance the vehicle's load capacity and traction, and enhance the adaptability of heavy vehicles.

[0051] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0052] The electric drive axle structure includes an electric drive axle housing 10 and two drive structures 20 arranged therein, the two drive structures 20 are respectively used to be connected to the left drive wheel 21 and the right drive wheel 22 of the vehicle, and each drive structure 20 includes a first planetary row 30, a second planetary row 40, a first shift assembly 50, a second shift assembly 60 and a drive motor 11; the first planetary row 30 is connected to the second planetary row 40 through the first shift assembly 50 and the second shift assembly 60, respectively, so that four gear connections are formed between the first planetary row 30 and the second planetary row 40; the output end of the drive motor 11 is connected to the first planetary row 30, so as to input power to the first planetary row 30, and output power to the left drive wheel 21 and the right drive wheel 22 through the second planetary row 40. In this way, through the cooperation of the first shift assembly 50 and the second shift assembly 60, four gear connections can be formed between the first planetary gear row 30 and the second planetary gear row 40, so that the electric drive bridge can provide a wider speed ratio range, can better balance power and economy, reduce the requirements for motor performance, and provide more flexible and efficient power transmission for the vehicle under different working conditions to meet the large output torque requirements of the wheel end of heavy commercial vehicles, thereby solving the problem that the electric drive bridge structure in the prior art is difficult to meet the large output torque requirements of the wheel end of heavy vehicles. In addition, by integrating the two drive structures 20 into the coaxial structure in the single electric drive bridge housing 10, through the combined use of the first planetary gear row 30 and the second planetary gear row 40, not only the structure of the electric drive bridge is simplified, but also the compactness of the system is effectively improved, which is conducive to the layout optimization and space utilization of the vehicle chassis.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0055] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0057] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric drive axle structure, comprising an electric drive axle housing (10) and two drive structures (20) arranged therein, wherein the two drive structures (20) are respectively used to be connected to a left drive wheel (21) and a right drive wheel (22) of a vehicle, and characterized in that: Each of the driving structures (20) comprises: A first planetary row (30) and a second planetary row (40); A first shift assembly (50) and a second shift assembly (60), wherein the first planetary gear row (30) is connected to the second planetary gear row (40) through the first shift assembly (50) and the second shift assembly (60), respectively, so that four gear positions are formed between the first planetary gear row (30) and the second planetary gear row (40); A drive motor (11), wherein an output end of the drive motor (11) is connected to the first planetary gear (30) so as to input power to the first planetary gear (30) and output power to the left drive wheel (21) and the right drive wheel (22) via the second planetary gear (40).

2. The electric drive bridge structure according to claim 1, characterized in that: Each of the driving structures (20) further comprises: The first switching component comprises a first switching component A (1), a first switching component B (2), a first switching component C (3), a first switching component D (4) and a first switching component E (5), wherein the first switching component A (1) is the electric drive axle housing (10), the first switching component B (2) is the second planetary carrier shaft (430) of the second planetary gear (40), the first switching component C (3) is the second sun gear shaft (440) of the second planetary gear (40), the first switching component D (4) is the first planetary carrier shaft (330) of the first planetary gear (30), and the first switching component E (5) is the first sun gear shaft (340) of the first planetary gear (30).

3. The electric drive bridge structure according to claim 2, characterized in that: The first shift assembly (50) comprises: A first motor (51); A first shift sleeve (52) is connected to an output end of the first motor (51), and two first connection parts (520) are respectively provided on the first shift sleeve (52), so that the first motor (51) drives the first shift sleeve (52) to drive the two first connection parts (520) to be respectively connected to corresponding two of the first switching member A (1), the first switching member B (2), the first switching member C (3), the first switching member D (4) and the first switching member E (5).

4. The electric drive bridge structure according to claim 3, characterized in that: The first shift sleeve (52) is provided with two first spline teeth on the inner surface of the two first connecting parts (520), respectively, so as to be respectively engaged with the first external splines on the first switching member A (1), the first switching member B (2), the first switching member C (3), the first switching member D (4) and the first switching member E (5).

5. The electric drive bridge structure according to claim 1, characterized in that: Each of the driving structures (20) further comprises: The second switching component comprises a second switching member a (6), a second switching member b (7) and a second switching member c (8), wherein the second switching member a (6) is the electric drive axle housing (10), the second switching member b (7) is the first planetary carrier shaft (330) of the first planetary gear set (30), and the second switching member c (8) is the second ring gear shaft (410) of the second planetary gear set (40).

6. The electric drive bridge structure according to claim 5, characterized in that: The second shift assembly (60) comprises: A second motor (61); The second shift sleeve (62) is connected to the output end of the second motor (61), and the second shift sleeve (62) is provided with two second connection parts (620) respectively, so that the second motor (61) drives the second shift sleeve (62) to drive the two second connection parts (620) to be connected to corresponding two of the second switching member a (6), the second switching member b (7) and the second switching member c (8).

7. The electric drive bridge structure according to claim 6, characterized in that: The second shift sleeve (62) is provided with second spline teeth on the inner surfaces of the two second connecting parts (620), respectively, so as to be respectively engaged with the second external splines on the second switching member a (6), the second switching member b (7) and the second switching member c (8).

8. The electric drive bridge structure according to claim 2, characterized in that: The electric drive bridge structure also includes: A differential (70) is arranged in the electric drive axle housing (10); the second planetary carrier shafts (430) of the two second planetary gears (40) are respectively connected to the differential (70); the differential (70) is respectively connected to the left drive wheel (21) and the right drive wheel (22) through two half shafts, so that the power output by the two second planetary gears (40) is decelerated by the differential (70) and then transmitted to the left drive wheel (21) and the right drive wheel (22) respectively.

9. The electric drive bridge structure according to claim 1, characterized in that: The first planetary gear (30) comprises: A first ring gear (31), wherein the first ring gear (31) is connected to a first ring gear shaft, and the first ring gear shaft is connected to the electric drive axle housing (10); A first planetary gear (32) meshingly connected with the first ring gear (31); A first planet carrier (33), the first planetary gear (32) being arranged on the first planet carrier (33), a first planet carrier shaft (330) passing through the first planet carrier (33), the first planet carrier shaft (330) being used to be connected to the first shift assembly (50) and the second shift assembly (60) respectively; The first sun gear (34) is meshedly connected with the first planetary gear (32); a first sun gear shaft (340) is passed through the first sun gear (34); the first sun gear shaft (340) is connected to the output end of the drive motor (11) and is used to connect to the first shift assembly (50).

10. The electric drive bridge structure according to claim 1, characterized in that: The second planetary gear (40) comprises: A second ring gear (41), the second ring gear (41) being connected to a second ring gear shaft (410), the second ring gear shaft (410) being used to be connected to the second shift assembly (60); A second planetary gear (42) meshingly connected with the second ring gear (41); a second planet carrier (43), the second planetary gear (42) being arranged on the second planet carrier (43), a second planet carrier shaft (430) passing through the second planet carrier (43), and the second planet carrier shaft (430) being used to be connected to the first shift assembly (50); The second sun gear (44) is meshedly connected with the second planetary gear (42); a second sun gear shaft (440) is passed through the second sun gear (44); and the second sun gear shaft (440) is used to be connected with the first shift assembly (50).

11. A vehicle, comprising an electric drive axle structure, characterized in that: The electric drive bridge structure is the electric drive bridge structure according to any one of claims 1 to 10.

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