The application relates to an electric drive axle assembly applied to a new energy commercial vehicle and a new energy commercial vehicle

Abstract

This specification discloses an electric drive axle assembly for new energy commercial vehicles and the new energy commercial vehicle itself, relating to the field of electric drive axle technology. In the electric drive axle, an intermediate shaft is connected to a first gear set, a second gear set, and a first synchronizer. The first synchronizer can slide between a first position and a second position, connecting the intermediate shaft to either the first or second gear set. The intermediate shaft is fixedly connected to the sun gear. The planetary gear set includes a first planetary gear and a second planetary gear coaxially arranged. The first planetary gear meshes with the sun gear and a first internal gear ring. The second planetary gear meshes with a second internal gear ring, and the planetary shaft is connected to the planet carrier. The first internal gear ring, the second internal gear ring, the housing, and the second synchronizer are connected. The second synchronizer can slide between a third position and a fourth position, fixing either the first or second internal gear ring. Therefore, this design enables switching between different power output structures, has a simple structure, fewer shafts, and improves transmission efficiency.

Description

Technical Field

[0001] This specification relates to the field of electric drive axle technology, and in particular to an electric drive axle assembly for use in new energy commercial vehicles and the new energy commercial vehicle itself. Background Technology

[0002] Typically, heavy-duty commercial trucks with pure electric drive use two drive methods to transmit vehicle power: central electric drive and electric drive axle. Electric drive axle has more development potential due to its advantage of requiring less installation space.

[0003] In existing technologies, the electric drive axles of new energy commercial vehicles are generally arranged with two, three, or four gears, either in a parallel shaft or planetary gear system. However, they occupy a large space and have low transmission efficiency. Summary of the Invention

[0004] This specification provides an electric drive axle assembly for use in new energy commercial vehicles and a new energy commercial vehicle, so as to at least partially solve the above-mentioned problems existing in the prior art.

[0005] The following technical solution is adopted in this specification: This specification provides an electric drive axle assembly for new energy commercial vehicles, characterized in that it includes a first gear set, a second gear set, an intermediate shaft, a sun gear, a first internal gear ring, a second internal gear ring, a housing, a first synchronizer, a second synchronizer, a planetary gear set, and a planetary carrier. The intermediate shaft is connected to the first gear set, the second gear set, and the first synchronizer, respectively. The first synchronizer can slide between a first position and a second position. When the first synchronizer is in the first position, the first gear set is connected to the intermediate shaft. When the first synchronizer is in the second position, the second gear set is connected to the intermediate shaft. The intermediate shaft is fixedly connected to the sun gear for transmitting power to the sun gear. The planetary gear set includes a first planetary gear and a second planetary gear arranged coaxially. The first planetary gear meshes with the sun gear and the first internal gear ring, respectively. The second planetary gear meshes with the second internal gear ring. The planetary shaft passing through the first planetary gear and the second planetary gear is connected to the planet carrier. The first internal gear ring, the second internal gear ring, the housing, and the second synchronizer are connected in cooperation. The second synchronizer can slide between a third position and a fourth position. When the second synchronizer is in the third position, the first internal gear ring is fixedly connected to the housing, and the second internal gear ring is in a free state. When the second synchronizer is in the fourth position, the second internal gear ring is fixedly connected to the housing, and the first internal gear ring is in a free state.

[0006] Preferably, the electric drive axle assembly used in new energy commercial vehicles includes an input shaft; The input shaft is connected to the motor, the first gear set, and the second gear set of the new energy commercial vehicle, respectively, and is used to transmit the power of the motor to the first gear set and the second gear set.

[0007] Preferably, the electric drive axle assembly used in new energy commercial vehicles includes a differential and a half-shaft; The planetary carrier, the differential, and the half-shaft are connected in sequence. The planetary carrier can transmit power to the half-shaft through the differential to drive the vehicle.

[0008] Preferably, the transmission ratio of the first gear set is less than the transmission ratio of the second gear set.

[0009] Preferably, the planetary gear set is provided with multiple components; Multiple planetary gear sets are respectively arranged around the sun gear, and the multiple planetary gear sets have a centrally symmetrical structure.

[0010] Preferably, when the first synchronizer is in the first position and the second synchronizer is in the third position, the intermediate shaft transmits kinetic energy to the sun gear through the first gear set; during the rotation of the sun gear, it drives the first planet gear meshing with it to rotate; when the first planet gear rotates, it is subjected to the reaction force of the first internal gear ring that is fixed and meshing with it, and revolves around the sun gear, driving the planet carrier to rotate and transmitting kinetic energy to the planet carrier.

[0011] Preferably, when the first synchronizer is in the second position and the second synchronizer is in the third position, the intermediate shaft transmits kinetic energy to the sun gear through the second gear set; during the rotation of the sun gear, it drives the first planet gear meshing with it to rotate; when the first planet gear rotates, it is subjected to the reaction force of the first internal gear ring that is fixed and meshing with it, and revolves around the sun gear, driving the planet carrier to rotate and transmitting kinetic energy to the planet carrier.

[0012] Preferably, when the first synchronizer is in the first position and the second synchronizer is in the fourth position, the intermediate shaft transmits kinetic energy to the sun gear through the first gear set; during the rotation of the sun gear, it drives the first planet gear meshing with it to rotate; the first planet gear drives the second planet gear to rotate; when the second planet gear rotates, it is subjected to the reaction force of the second internal gear ring that is fixed and meshing with it, and revolves around the sun gear, and drives the planet carrier to rotate, transmitting kinetic energy to the planet carrier.

[0013] Preferably, when the first synchronizer is in the second position and the second synchronizer is in the fourth position, the intermediate shaft transmits kinetic energy to the sun gear through the second gear set; during the rotation of the sun gear, it drives the first planet gear meshing with it to rotate; the first planet gear drives the second planet gear to rotate; when the second planet gear rotates, it is subjected to the reaction force of the second internal gear ring that is fixed and meshes with it, and revolves around the sun gear, and drives the planet carrier to rotate, transmitting kinetic energy to the planet carrier.

[0014] On the other hand, this specification provides a new energy commercial vehicle, including the electric drive axle assembly for new energy commercial vehicles provided in the foregoing aspect.

[0015] The above-mentioned technical solutions adopted in this specification can achieve the following beneficial effects: According to the above, the electric drive axle assembly used in new energy commercial vehicles includes a first gear set, a second gear set, an intermediate shaft, a sun gear, a first internal gear ring, a second internal gear ring, a housing, a first synchronizer, a second synchronizer, a planetary gear set, and a planet carrier. The intermediate shaft is connected to the first gear set, the second gear set, and the first synchronizer, which can slide between a first position and a second position. When the first synchronizer is in the first position, the first gear set is connected to the intermediate shaft. When the first synchronizer is in the second position, the second gear set is connected to the intermediate shaft. The intermediate shaft is fixedly connected to the sun gear for transmitting power to it. The planetary gear set includes a first planetary gear and a second planetary gear coaxially arranged. The first planetary gear meshes with the sun gear and the first internal gear ring. The second planetary gear meshes with the second internal gear ring; a planetary shaft passing through the first and second planetary gears is connected to the planet carrier. The first internal gear ring, the second internal gear ring, the housing, and the second synchronizer are connected, and the second synchronizer can slide between a third position and a fourth position. When the second synchronizer is in the third position, the first internal gear ring is fixedly connected to the housing, and the second internal gear ring is in a free state. When the second synchronizer is in the fourth position, the second internal gear ring is fixedly connected to the housing, and the first internal gear ring is in a free state.

[0016] It can be seen that by adjusting the positions of the first synchronizer and the second synchronizer, different gears can be switched to achieve different power output structures. Moreover, the structure is simple, with fewer shafts, realizing two-stage transmission and improving transmission efficiency. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this specification and form part of this specification, illustrate exemplary embodiments and are used to explain this specification, but do not constitute an undue limitation thereof. In the drawings: Figure 1 A schematic diagram of an electric drive axle assembly for use in a new energy commercial vehicle, provided as an embodiment of this specification; Figure 2 A partial structural schematic diagram of an electric drive axle assembly for a new energy commercial vehicle provided as an embodiment of this specification; Figure 3 A partial structural diagram of an electric drive axle assembly for use in new energy commercial vehicles, provided as an embodiment of this specification. Figure 4 A shifting diagram of an electric drive axle assembly for use in new energy commercial vehicles, provided as an embodiment of this specification; Figure 5 A shifting diagram of an electric drive axle assembly for use in new energy commercial vehicles, provided as an embodiment of this specification; Figure 6 A shifting diagram of an electric drive axle assembly for use in new energy commercial vehicles, provided as an embodiment of this specification; Figure 7 This is a shifting diagram of an electric drive axle assembly for use in new energy commercial vehicles, provided as an embodiment of this specification.

[0018] Explanation of reference numerals in the attached figures: First gear set 11; Second gear set 12; Intermediate shaft 13; Sun gear 14; First internal gear ring 15; Second internal gear ring 16; Housing 17; First synchronizer 18; Second synchronizer 19; Planetary gear set 20; Planet carrier 21; Motor 22; Input shaft 23; Differential 24; Half shaft 25; Wheel 26; Planetary shaft 27; First planetary gear 28; Second planetary gear 29. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this specification clearer, the technical solutions of this specification will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this specification without creative effort are within the scope of protection of this application.

[0020] In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or" unless otherwise expressly stated in the content.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0022] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] The technical solutions provided in the various embodiments of this specification are described in detail below with reference to the accompanying drawings.

[0024] Figure 1 A schematic diagram of an electric drive axle assembly for use in new energy commercial vehicles, provided as an embodiment of this specification, is shown below. Figure 1 As shown, the electric drive axle assembly for new energy commercial vehicles includes a first gear set 11, a second gear set 12, an intermediate shaft 13, a sun gear 14, a first internal gear ring 15, a second internal gear ring 16, a housing 17, a first synchronizer 18, a second synchronizer 19, a planetary gear set 20, and a planet carrier 21.

[0025] Preferably, the first gear set 11 and the second gear set 12 are both connected to the motor 22 of the new energy commercial vehicle. After the motor 22 is started, both the first gear set 11 and the second gear set 12 are in operation.

[0026] Preferably, the transmission ratios of the first gear set 11 and the second gear set 12 are different.

[0027] Preferably, the transmission ratio of the first gear set 11 is smaller than that of the second gear set 12.

[0028] Preferably, the intermediate shaft 13 is connected to the first gear set 11, the second gear set 12 and the first synchronizer 18 respectively, and the first synchronizer 18 can slide between the first position and the second position.

[0029] Preferably, when the first synchronizer 18 is in the first position, the first gear set 11 is connected to the intermediate shaft 13. When the first gear set 11 is running, it can drive the intermediate shaft 13 to rotate.

[0030] Preferably, when the first synchronizer 18 is in the second position, the second gear set 12 is connected to the intermediate shaft 13. When the second gear set 12 is running, it can drive the intermediate shaft 13 to rotate.

[0031] Preferably, the intermediate shaft 13 is fixedly connected to the sun gear 14 for transmitting power to the sun gear 14.

[0032] Preferably, the planetary gear set 20 includes a first planetary gear 28 and a second planetary gear 29 arranged coaxially, and a planetary shaft 27.

[0033] Preferably, both the first planetary gear 28 and the second planetary gear 29 are fitted onto the outside of the planetary shaft 27.

[0034] Preferably, the planetary gear set 20 includes a planetary gear bushing, which is sleeved on the outside of the planetary shaft 27 and is distributed and connected to the first planetary gear 28 and the second planetary gear 29.

[0035] More preferably, the planetary shaft 27 does not rotate, while the planetary gear bushing is rotatably connected to the planetary shaft 27 and can rotate around the planetary shaft 27. When the first planetary gear 28 rotates, it can drive the planetary gear bushing to rotate, thereby driving the second planetary gear 29 to rotate.

[0036] Preferably, the first planetary gear 28 meshes with the sun gear 14 and the first internal gear ring 15 respectively.

[0037] Preferably, the second planetary gear 29 meshes with the second internal gear ring 16.

[0038] Preferably, the planetary axis 27, which passes through the first planetary gear 28 and the second planetary gear 29, is connected to the planet carrier 21.

[0039] Preferably, the diameters of the first planetary gear 28 and the second planetary gear 29 are different.

[0040] Preferably, the first planetary gear 28 and the second planetary gear 29 are connected by a planetary gear bushing and can rotate synchronously.

[0041] Preferably, the transmission ratio between the first planetary gear 28 and the first internal gear ring 15 is less than the transmission ratio between the second planetary gear 29 and the second internal gear ring 26.

[0042] Preferably, the diameter of the first internal gear ring 15 is larger than the diameter of the second internal gear ring 16.

[0043] Preferably, the transmission ratio of the first gear set 11 is A times the transmission ratio of the second gear set 12, where A>1.

[0044] Preferably, the transmission ratio between the first planetary gear 28 and the first internal gear ring 15 is B times the transmission ratio between the second planetary gear 29 and the second internal gear ring 26, where B>1.

[0045] Preferably, A is less than or equal to B.

[0046] Preferably, A is greater than B. For example, the transmission ratio of the first gear set 11 is 5, the transmission ratio of the second gear set 12 is 3, the transmission ratio of the first planetary gear 28 to the first internal gear ring 15 is 0.8, and the transmission ratio of the second planetary gear 29 to the second internal gear ring 26 is 0.5.

[0047] Figure 2 as well as Figure 3 These are partial structural diagrams of an electric drive axle assembly applied to new energy commercial vehicles, provided as an embodiment of this specification. Figure 2as well as Figure 3 As shown, the first planetary gear 28 meshes with the sun gear 14 and the first internal gear ring 15, respectively. The second planetary gear 29 meshes with the second internal gear ring 16. The planetary shaft 27, which passes through the first planetary gear 28 and the second planetary gear 29, is connected to the planet carrier 21. Figure 2 and Figure 3 The front and back of the structure are shown respectively.

[0048] Preferably, the first internal gear ring 15, the second internal gear ring 16, the housing 17, and the second synchronizer 19 are connected in a cooperative manner, and the second synchronizer 19 is capable of sliding between the third position and the fourth position.

[0049] Preferably, when the second synchronizer 19 is in the third position, the first internal gear ring 15 is fixedly connected to the housing 17, and the second internal gear ring 16 is in a free state.

[0050] Preferably, when the second synchronizer 19 is in the fourth position, the second internal gear ring 16 is fixedly connected to the housing 17, and the first internal gear ring 15 is in a free state.

[0051] The above structure forms a two-stage reduction through the gear set and planetary mechanism. Compared with the multi-stage series gear reduction structure, the power transmission chain is shorter, the number of meshing gears is less, the gear meshing loss and bearing loss are reduced, the overall mechanical transmission efficiency is improved, thereby reducing energy consumption and improving the vehicle's range.

[0052] Preferably, when the second synchronizer 19 is in the third position, the planetary gear train is an internal ring gear-planetary gear (NGW) configuration. In this configuration, the first internal ring gear 15 is connected to or constrained to a relatively fixed state with the housing 17, the sun gear 14 maintains a power input connection with the intermediate shaft 13, the first planetary gear 28 meshes with the first internal ring gear 15, and the planet carrier 21 is connected to the output end (differential 24). The first internal ring gear 15 serves as a constraint member (fixed member), the first planetary gear 28 serves as an intermediate transmission member, the sun gear 14 serves as the input member, and the planet carrier 21 serves as the output member, thus achieving power output.

[0053] Preferably, when the second synchronizer 19 is in the fourth position, the planetary gear train is a composite (NW) configuration of internal gear ring-sun gear 14-planet gear. The first internal gear ring 15 is decoupled from the housing 17, the second internal gear ring 16 is connected to or constrained to the housing 17 in a relatively fixed state, the sun gear 14 still serves as the input component, the second planet gear 29 meshes with both the sun gear 14 and the second internal gear ring 16, and the planet carrier 21 still serves as the output component.

[0054] By adopting the above structure, different configurations can be switched through the planetary gear set 20, achieving multi-gear function with fewer shafts. Compared with the traditional parallel shaft multi-gear structure, it reduces the intermediate drive shaft, additional shifting mechanism and auxiliary support structure, reduces the radial and axial dimensions of the electric drive axle assembly, reduces space requirements, and facilitates integrated layout in the chassis space of new energy commercial vehicles without encroaching on the layout space of battery cells, motors and other structures.

[0055] The first synchronizer 18 is used for switching between the first gear set 11 and the second gear set 12, and the second synchronizer 19 is used for switching the planetary mechanism configuration. Together, they form a graded shift control. During shifting, continuous power transmission can be achieved through coordinated control of motor torque, reducing the significant power interruption during traditional shifting. This improves vehicle smoothness and ride comfort, making it particularly suitable for the frequent start-stop and load changes of new energy commercial vehicles. Therefore, the above structure ensures good continuity of vehicle power output and reduces the power loss caused by gear shifting.

[0056] Furthermore, the switching between the first synchronizer 18 and the second synchronizer 19 allows for four gear ratios, covering various scenarios such as high and low gear ratios. During vehicle start-up, heavy-load hill climbing, and low-speed obstacle avoidance, a higher gear ratio can output greater wheel-end torque, improving vehicle traction. During medium-to-high-speed cruising, a lower gear ratio can be switched to reduce motor speed, improving overall vehicle transmission efficiency and range, thus balancing power performance and fuel economy.

[0057] According to the above, the electric drive axle assembly used in new energy commercial vehicles includes a first gear set 11, a second gear set 12, an intermediate shaft 13, a sun gear 14, a first internal gear ring 15, a second internal gear ring 16, a housing 17, a first synchronizer 18, a second synchronizer 19, a planetary gear set 20, and a planet carrier 21. The intermediate shaft 13 is connected to the first gear set 11, the second gear set 12, and the first synchronizer 18, and the first synchronizer 18 can slide between a first position and a second position. When the first synchronizer 18 is in the first position, the first gear set 11 is connected to the intermediate shaft 13. When the first synchronizer 18 is in the second position, the second gear set 12 is connected to the intermediate shaft 13. The intermediate shaft 13 is fixedly connected to the sun gear 14 for transmitting power to the sun gear 14. The planetary gear set 20 includes a first planetary gear 28 and a second planetary gear 29 coaxially arranged, with the first planetary gear 28 meshing with the sun gear 14 and the first internal gear ring 15, respectively. The second planetary gear 29 meshes with the second internal gear ring 16; the planetary shaft 27, passing through the first planetary gear 28 and the second planetary gear 29, is connected to the planet carrier 21. The first internal gear ring 15, the second internal gear ring 16, the housing 17, and the second synchronizer 19 are connected in a cooperative manner, and the second synchronizer 19 can slide between a third position and a fourth position. When the second synchronizer 19 is in the third position, the first internal gear ring 15 is fixedly connected to the housing 17, and the second internal gear ring 16 is in a free state. When the second synchronizer 19 is in the fourth position, the second internal gear ring 16 is fixedly connected to the housing 17, and the first internal gear ring 15 is in a free state.

[0058] As can be seen, the different positions of the first synchronizer 18 and the second synchronizer 19 correspond to different gears. By adjusting the positions of the first synchronizer 18 and the second synchronizer 19, switching between four gears can be achieved, realizing power output adjustment over a wide speed ratio range and realizing different power output structures. Compared with traditional single-stage reduction structures or complex multi-shaft multi-clutch structures, it has better output continuity, reduces the power loss caused by gear shifting, and has a simple structure. While saving chassis space for new energy commercial vehicles, it has fewer shafts, shorter synchronizer switching paths, and can achieve two-stage transmission without complex structures, improving transmission efficiency, effectively shortening power switching time, improving vehicle acceleration response and operating condition switching capabilities, and meeting the needs of new energy commercial vehicles for rapid power response in scenarios such as urban logistics, port transportation, and mining transportation.

[0059] Preferably, the electric drive axle assembly used in new energy commercial vehicles includes an input shaft 23.

[0060] Preferably, the input shaft 23 is connected to the motor 22 of the new energy commercial vehicle, the first gear set 11 and the second gear set 12 respectively, for transmitting the power of the motor 22 to the first gear set 11 and the second gear set 12.

[0061] Preferably, the electric drive axle assembly used in new energy commercial vehicles includes a differential 24 and a half-shaft 25.

[0062] Preferably, the planetary carrier 21, the differential 24, and the half-shaft 25 are connected in sequence, and the planetary carrier 21 can transmit power to the half-shaft 25 through the differential 24 to drive the vehicle.

[0063] Preferably, the half-shaft 25 is connected to the wheel 26 of the new energy commercial vehicle and can drive the wheel 26 to run.

[0064] Preferably, the planetary gear set 20 is provided with multiple planetary gears.

[0065] Preferably, the planetary gear set 20 is provided with 3.

[0066] Preferably, multiple planetary gear sets 20 are respectively arranged around the sun gear 14, and the multiple planetary gear sets 20 have a centrally symmetrical structure.

[0067] Figure 4 , Figure 5 , Figure 6 as well as Figure 7 These are all schematic diagrams of gear shifting for an electric drive axle assembly applied to new energy commercial vehicles, provided as an embodiment of this specification.

[0068] Preferably, when the first synchronizer 18 is in the first position and the second synchronizer 19 is in the third position, the intermediate shaft 13 transmits kinetic energy to the sun gear 14 through the first gear set 11. During the rotation of the sun gear 14, it drives the first planetary gear 28, which meshes with it, to rotate. When the first planetary gear 28 rotates, it receives a reaction force from the fixed and meshing first internal gear ring 15, causing it to revolve around the sun gear 14. As the planetary shaft 27 revolves with the first planetary gear 28, it drives the planet carrier 21 to rotate, transmitting kinetic energy to the planet carrier 21. Specifically, as follows... Figure 4 As shown.

[0069] With the above structure, the transmission is achieved through the first gear set 11 with a large transmission ratio, and the first planetary gear 28 and the first internal gear ring 15 with a large transmission ratio. The torque amplification factor is the largest and the vehicle speed is the lowest, which is suitable for working conditions such as climbing, starting with full load and low-speed traction.

[0070] Preferably, when the first synchronizer 18 is in the second position and the second synchronizer 19 is in the third position, the intermediate shaft 13 transmits kinetic energy to the sun gear 14 through the second gear set 12. During the rotation of the sun gear 14, it drives the first planetary gear 28, which meshes with it, to rotate. When the first planetary gear 28 rotates, it receives a reaction force from the fixed and meshing first internal gear ring 15, causing it to revolve around the sun gear 14. As the planetary shaft 27 revolves with the first planetary gear 28, it drives the planet carrier 21 to rotate, transmitting kinetic energy to the planet carrier 21. Specifically, as follows... Figure 5 As shown.

[0071] With the above structure, the transmission is achieved through the second gear set 12 with a smaller transmission ratio, and the first planetary gear 28 and the first internal gear ring 15 with a larger transmission ratio. The torque amplification factor is moderate, the vehicle speed is moderate, and it is suitable for normal driving conditions.

[0072] Preferably, when the first synchronizer 18 is in the first position and the second synchronizer 19 is in the fourth position, the intermediate shaft 13 transmits kinetic energy to the sun gear 14 through the first gear set 11. During the rotation of the sun gear 14, it drives the first planetary gear 28, which meshes with it, to rotate. The first planetary gear 28, through the planetary gear bushing, drives the second planetary gear 29 to rotate. When the second planetary gear 29 rotates, it receives a reaction force from the fixed and meshing second internal gear ring 16, and revolves around the sun gear 14. As the planetary shaft 27 revolves with the second planetary gear 29, it drives the planet carrier 21 to rotate, transmitting kinetic energy to the planet carrier 21. Specifically, as... Figure 6 As shown.

[0073] With the above structure, the transmission is achieved through the first gear set 11 with a large transmission ratio and the second planetary gear 29 and the second internal gear ring 16 with a small transmission ratio. The torque amplification factor is moderate, the vehicle speed is moderate, and it is suitable for normal driving conditions.

[0074] Preferably, when the first synchronizer 18 is in the second position and the second synchronizer 19 is in the fourth position, the intermediate shaft 13 transmits kinetic energy to the sun gear 14 through the second gear set 12. During the rotation of the sun gear 14, it drives the first planetary gear 28, which meshes with it, to rotate. The first planetary gear 28, through the planetary gear bushing, drives the second planetary gear 29 to rotate. When the second planetary gear 29 rotates, it receives a reaction force from the fixed and meshing second internal gear ring 16, and revolves around the sun gear 14. As the planetary shaft 27 revolves with the second planetary gear 29, it drives the planet carrier 21 to rotate, transmitting kinetic energy to the planet carrier 21. Specifically, as follows... Figure 7 As shown.

[0075] With the above structure, the transmission is achieved through the second gear set 12 with a smaller transmission ratio, and the second planetary gear 29 and the second internal gear ring 16 with a smaller transmission ratio. The torque amplification factor is the smallest and the vehicle speed is the fastest, which is suitable for working conditions such as light load and high-speed driving.

[0076] Preferably, the electric drive axle assembly used in new energy commercial vehicles has a compact structure.

[0077] Preferably, the electric drive axle assembly used in new energy commercial vehicles is a two-stage transmission.

[0078] By adopting the above structure, the smoothness of power transmission of the electric drive axle is improved, the overall size of the electric drive axle is reduced, the driving range is increased, and a multi-gear electric drive axle solution with low-speed (high speed ratio) high torque output, high-speed (low speed ratio) high-efficiency operation and low cost is achieved.

[0079] In some other preferred embodiments, multiple clutches may be used to replace the first synchronizer 18 and the second synchronizer 19 in the foregoing embodiments.

[0080] In some other preferred embodiments, the planetary gear set 20 in the aforementioned embodiments may be replaced by a plurality of parallel fixed-axis gears.

[0081] The above are one or more embodiments of the electric drive axle assembly for new energy commercial vehicles provided in this specification. Based on the same idea, this specification also provides corresponding new energy commercial vehicles.

[0082] Preferably, the new energy commercial vehicle includes the electric drive axle assembly for new energy commercial vehicles provided in any of the foregoing embodiments.

[0083] The above are one or more embodiments of the electric drive axle assembly for new energy commercial vehicles or new energy commercial vehicles provided in this specification. Based on the same idea, this specification also provides a corresponding electric drive axle assembly.

[0084] Preferably, this electric drive axle assembly is used in commercial vehicles.

[0085] Preferably, the other structures of this electric drive axle assembly are basically the same as those of the electric drive axle assembly for new energy commercial vehicles provided in the aforementioned embodiments, except that the input shaft 23 of the electric drive axle assembly for commercial vehicles is connected to the motor 22 or the engine. In other words, this electric drive axle assembly can be applied to commercial vehicles that use traditional chemical fuels as a power source, i.e., engine-driven commercial vehicles.

[0086] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0087] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0088] The above description is merely an embodiment of this specification and is not intended to limit this specification. Various modifications and variations can be made to this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of the claims of this application.

Claims

1. An electric drive axle assembly for use in new energy commercial vehicles, characterized in that, It includes a first gear set, a second gear set, an intermediate shaft, a sun gear, a first internal gear ring, a second internal gear ring, a housing, a first synchronizer, a second synchronizer, a planetary gear set, and a planet carrier; The intermediate shaft is connected to the first gear set, the second gear set, and the first synchronizer, respectively. The first synchronizer can slide between a first position and a second position. When the first synchronizer is in the first position, the first gear set is connected to the intermediate shaft. When the first synchronizer is in the second position, the second gear set is connected to the intermediate shaft. The intermediate shaft is fixedly connected to the sun gear for transmitting power to the sun gear. The planetary gear set includes a first planetary gear and a second planetary gear arranged coaxially. The first planetary gear meshes with the sun gear and the first internal gear ring, respectively. The second planetary gear meshes with the second internal gear ring. The planetary shaft passing through the first planetary gear and the second planetary gear is connected to the planet carrier. The first internal gear ring, the second internal gear ring, the housing, and the second synchronizer are connected in a cooperative manner, and the second synchronizer can slide between the third position and the fourth position; When the second synchronizer is in the third position, the first internal gear ring is fixedly connected to the housing, and the second internal gear ring is in a free state; when the second synchronizer is in the fourth position, the second internal gear ring is fixedly connected to the housing, and the first internal gear ring is in a free state.

2. The electric drive axle assembly for new energy commercial vehicles according to claim 1, characterized in that, The electric drive axle assembly used in new energy commercial vehicles includes an input shaft; The input shaft is connected to the motor, the first gear set, and the second gear set of the new energy commercial vehicle, respectively, and is used to transmit the power of the motor to the first gear set and the second gear set.

3. The electric drive axle assembly for new energy commercial vehicles according to claim 1, characterized in that, The electric drive axle assembly used in new energy commercial vehicles includes a differential and a half-shaft; The planetary carrier, the differential, and the half-shaft are connected in sequence. The planetary carrier can transmit power to the half-shaft through the differential to drive the vehicle.

4. The electric drive axle assembly for new energy commercial vehicles according to claim 1, characterized in that, The transmission ratio of the first gear set is less than that of the second gear set.

5. The electric drive axle assembly for new energy commercial vehicles according to claim 1, characterized in that, The planetary gear set is provided with multiple components; Multiple planetary gear sets are respectively arranged around the sun gear, and the multiple planetary gear sets have a centrally symmetrical structure.

6. The electric drive axle assembly for new energy commercial vehicles according to any one of claims 1-5, characterized in that, When the first synchronizer is in the first position and the second synchronizer is in the third position, the intermediate shaft transmits kinetic energy to the sun gear through the first gear set; during the rotation of the sun gear, it drives the first planet gear meshing with it to rotate; when the first planet gear rotates, it is subjected to the reaction force of the first internal gear ring that is fixed and meshing with it, and revolves around the sun gear, and drives the planet carrier to rotate, transmitting kinetic energy to the planet carrier.

7. The electric drive axle assembly for new energy commercial vehicles according to any one of claims 1-5, characterized in that, When the first synchronizer is in the second position and the second synchronizer is in the third position, the intermediate shaft transmits kinetic energy to the sun gear through the second gear set; during the rotation of the sun gear, it drives the first planet gear meshing with it to rotate; when the first planet gear rotates, it is subjected to the reaction force of the first internal gear ring that is fixed and meshing with it, and revolves around the sun gear, and drives the planet carrier to rotate, transmitting kinetic energy to the planet carrier.

8. The electric drive axle assembly for new energy commercial vehicles according to any one of claims 1-5, characterized in that, When the first synchronizer is in the first position and the second synchronizer is in the fourth position, the intermediate shaft transmits kinetic energy to the sun gear through the first gear set; during the rotation of the sun gear, it drives the first planet gear meshing with it to rotate; the first planet gear drives the second planet gear to rotate; when the second planet gear rotates, it is subjected to the reaction force of the second internal gear ring that is fixed and meshing with it, and revolves around the sun gear, and drives the planet carrier to rotate, transmitting kinetic energy to the planet carrier.

9. The electric drive axle assembly for new energy commercial vehicles according to any one of claims 1-5, characterized in that, When the first synchronizer is in the second position and the second synchronizer is in the fourth position, the intermediate shaft transmits kinetic energy to the sun gear through the second gear set; during the rotation of the sun gear, it drives the first planet gear meshing with it to rotate; the first planet gear drives the second planet gear to rotate; when the second planet gear rotates, it is subjected to the reaction force of the second internal gear ring that is fixed and meshing with it, and revolves around the sun gear, and drives the planet carrier to rotate, transmitting kinetic energy to the planet carrier.

10. A new energy commercial vehicle, characterized in that, Includes the electric drive axle assembly for new energy commercial vehicles as described in any one of claims 1-9.

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