Gearbox assembly, electric drive system and vehicle

Abstract

The utility model belongs to vehicle technical field, concretely relates to a gearbox assembly, electric drive system and vehicle. The gearbox assembly includes: casing, is seted up with first oil guide channel, motor input shaft, is rotatablely arranged in the casing, and is seted up with the second oil guide channel of intercommunication with first oil guide channel, motor rotor shaft, rotatablely arranged in the casing, and is connected with motor input shaft, motor rotor shaft is seted up with the third oil guide channel of intercommunication with second oil guide channel and the first oil outlet hole of intercommunication with third oil guide channel, rotor, is seted up with motor rotor shaft, along the axial direction of motor rotor shaft, and rotor is seted up with the oil groove of intercommunication with first oil outlet hole.

Description

Technical Field

[0001] This application belongs to the field of vehicle technology, specifically relating to a transmission assembly, an electric drive system, and a vehicle. Background Technology

[0002] With the increasing integration of electric drives, oil cooling of drive motors has become a trend. In pure electric drive assemblies, the lubrication requirements of the gearbox and the cooling requirements of the motor are both met by the cooling and lubrication assembly. At the same time, as motor power increases, with peak power reaching 200KW or even higher, and power density also increasing, the maximum cooling requirement of a single motor is approximately 8L / min. About 20% of the oil needs to enter the motor rotor core, getting closer to the rotor magnets to reduce the temperature of the rotor core and magnets.

[0003] In related technologies, oil inlet to the motor shaft is achieved by pressing an oil guide ring onto the housing and pressing a plug onto the motor shaft, or by adding a long oil guide pipe. This requires two additional stamped parts, which increases the cost. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a gearbox assembly, an electric drive system, and a vehicle, aiming to at least partially solve the technical problem of high cost in achieving oil inlet at the motor shaft center.

[0005] The technical solution of this utility model is as follows:

[0006] A gearbox assembly, characterized in that it comprises: a housing having a first oil guide channel; a motor input shaft rotatably disposed within the housing and having a second oil guide channel communicating with the first oil guide channel; a motor rotor shaft rotatably disposed within the housing and connected to the motor input shaft, the motor rotor shaft having a third oil guide channel communicating with the second oil guide channel and a first oil outlet communicating with the third oil guide channel; and a rotor sleeved on the motor rotor shaft, having an oil groove communicating with the first oil outlet along the axial direction of the motor rotor shaft.

[0007] In some embodiments, the third oil guiding channel includes a first segment and a second segment connected to the first segment, the second segment communicating with the second oil guiding channel; wherein the diameter of the second segment is larger than the diameter of the second oil guiding channel, and the diameter of the second segment is larger than the diameter of the first segment.

[0008] In some embodiments, the first oil outlet includes a first sub-oil outlet communicating with the first segment and a second sub-oil outlet communicating with the second segment, and the oil groove includes a first sub-oil groove and a second sub-oil groove; wherein the first sub-oil outlet and the second sub-oil outlet are located on opposite sides of the rotor, the first sub-oil outlet is communicating with the first sub-oil groove, and the second sub-oil outlet is communicating with the second sub-oil groove.

[0009] In some implementations, there are multiple first sub-oil outlet holes, each corresponding to a multiple first sub-oil groove, and the first sub-oil outlet holes are connected to the corresponding first sub-oil grooves. There are also multiple second sub-oil outlet holes, each corresponding to a multiple second sub-oil groove, and the second sub-oil outlet holes are connected to the corresponding second sub-oil grooves.

[0010] In some implementations, the first sub-oil outlet is located between two adjacent second sub-oil outlets, and the first sub-oil trough is located between two adjacent second sub-oil troughs.

[0011] In some implementations, the diameter of the first sub-oil outlet is smaller than the diameter of the second sub-oil outlet.

[0012] In some embodiments, the housing is provided with an input shaft bearing, which is sleeved on the motor rotor shaft; the motor rotor shaft has a second oil outlet hole communicating with the second section, and the oil outlet hole is inclined along the direction from the second section toward the input shaft bearing.

[0013] In some embodiments, the second oil guide channel includes a third segment communicating with the third oil guide channel and a fourth segment connected to the third segment, the fourth segment communicating with the first oil guide channel; wherein the diameter of the third segment is larger than the diameter of the fourth segment.

[0014] Based on the same inventive concept, this application also provides an electric drive system, including the aforementioned gearbox assembly.

[0015] Based on the same inventive concept, this application also provides a vehicle including the aforementioned electric drive system.

[0016] The beneficial effects of this utility model include at least the following:

[0017] Because the housing has a first oil guide channel, the motor input shaft is rotatably mounted inside the housing and has a second oil guide channel communicating with the first oil guide channel. The motor rotor shaft is rotatably mounted inside the housing and connected to the motor input shaft. Therefore, the motor input shaft can drive the motor rotor shaft to rotate. Because the motor rotor shaft has a third oil guide channel communicating with the second oil guide channel and a first oil outlet communicating with the third oil guide channel, and the rotor is sleeved on the motor rotor shaft, along the axial direction of the motor rotor shaft, the rotor has an oil groove communicating with the first oil outlet. Therefore, the motor rotor shaft can drive the rotor to rotate. When the rotor needs to be cooled, the cooling oil can enter the second oil guide channel through the first oil guide channel, and then enter the third oil guide channel through the second oil guide channel, and then enter the oil groove through the first oil outlet to cool the rotor, reduce the temperature of the rotor core and magnets, and ensure the normal operation of the rotor. It eliminates the need for press-fitted oil guide rings on the housing, press-fitted plugs on the motor shaft, and oil guide pipes, thus reducing costs.

[0018] Meanwhile, since the first and second oil guide channels can introduce cooling oil from the gearbox side into the third oil guide channel, the height of the rear end cover of the electric drive system can be reduced, the height of the housing can be reduced, thereby reducing the Y-axis dimension of the electric drive system and improving the configurability of the electric drive system. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 These are schematic diagrams of the transmission assembly in some embodiments;

[0021] Figure 2 for Figure 1 A schematic diagram showing the connection between the motor input shaft and the first oil guide channel of the intermediate gearbox assembly.

[0022] In the attached image:

[0023] Housing 10, first oil guide channel 11;

[0024] Motor input shaft 20, second oil guide channel 21, third section 211, fourth section 212;

[0025] Motor rotor shaft 30, third oil guide channel 31, first section 311, second section 312, first oil outlet 32, first sub-oil outlet 321, second sub-oil outlet 322, second oil outlet 33;

[0026] Rotor 40;

[0027] Input shaft bearing 50. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that all directional indications in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0032] This application is described below with reference to the accompanying drawings and specific embodiments:

[0033] The gearbox assembly, electric drive system, and vehicle provided in this embodiment aim to at least partially solve the technical problem of high cost in achieving oil inlet at the motor shaft center.

[0034] Combination Figure 1The gearbox assembly in this embodiment includes a housing 10, a motor input shaft 20, a motor rotor shaft 30, and a rotor 40. The housing 10 has a first oil guide channel 11. The motor input shaft 20 is rotatably disposed within the housing 10 and has a second oil guide channel 21 communicating with the first oil guide channel 11. The motor rotor shaft 30 is rotatably disposed within the housing 10 and connected to the motor input shaft 20. The motor rotor shaft 30 has a third oil guide channel 31 communicating with the second oil guide channel 21 and a first oil outlet 32 ​​communicating with the third oil guide channel 31. The rotor 40 is sleeved on the motor rotor shaft 30, and along the axial direction of the motor rotor shaft 30, the rotor 40 has an oil groove communicating with the first oil outlet 32.

[0035] Because the housing 10 has a first oil guide channel 11, the motor input shaft 20 is rotatably disposed within the housing 10 and has a second oil guide channel 21 communicating with the first oil guide channel 11. The motor rotor shaft 30 is rotatably disposed within the housing 10 and connected to the motor input shaft 20. Therefore, the motor input shaft 20 can drive the motor rotor shaft 30 to rotate. Because the motor rotor shaft 30 has a third oil guide channel 31 communicating with the second oil guide channel 21 and a first oil outlet 32 ​​communicating with the third oil guide channel 31, the rotor 40 is sleeved on the motor rotor shaft 30 and rotates along the motor rotor shaft 30. Along the axial direction of 0, the rotor 40 has an oil groove communicating with the first oil outlet 32. Therefore, the motor rotor shaft 30 can drive the rotor 40 to rotate. When the rotor 40 needs to be cooled, the cooling oil can enter the second oil guide channel 21 through the first oil guide channel 11, and then enter the third oil guide channel 31 through the second oil guide channel 21, and then enter the oil groove through the first oil outlet 32 ​​to cool the rotor 40, reduce the temperature of the rotor core and magnets, and ensure the normal operation of the rotor 40. It does not require the housing 10 to press-fit the oil guide ring + the motor shaft to press-fit the plug and the oil guide pipe, thus reducing the cost.

[0036] Meanwhile, since the first oil guide channel 11 and the second oil guide channel 21 can introduce cooling oil from the gearbox side into the third oil guide channel 31, the height of the rear end cover of the electric drive system can be reduced, the height of the housing 10 can be reduced, thereby reducing the Y-axis dimension of the electric drive system and improving the mountability of the electric drive system.

[0037] In some embodiments, the inner wall of the third oil guide channel 31 has an internal spline, and the outer wall of the motor input shaft 20 has an external spline. The internal spline meshes with the external spline to achieve the connection between the motor input shaft 20 and the motor rotor shaft 30.

[0038] The motor input shaft 20 and the motor rotor shaft 30 are connected by a spline. Compared to a single-key connection (such as a flat key), this significantly increases the contact area, thereby improving torque transmission capability. Furthermore, the spline tooth profile design evenly distributes the load, reducing stress concentration, making it suitable for high-torque, high-load applications. The tooth groove and key mesh of the spline connection automatically achieve axial and radial alignment, reducing eccentricity problems caused by assembly errors and improving the smoothness and reliability of the gearbox assembly. The high precision of the tooth profile and groove mesh of the spline connection between the motor input shaft 20 and the motor rotor shaft 30 enables accurate axial and circumferential positioning. The spline connection occupies less space axially and radially, making it suitable for compact applications.

[0039] In some embodiments, the outlet of the first oil guide channel 11 is provided with a flow regulating valve. The flow rate of the oil guide channel 11 into the oil guide pipe is controlled by the flow regulating valve to ensure that there is enough cooling oil to cool the rotor 40, reduce the temperature of the rotor 40 core and magnets, and ensure the normal operation of the rotor 40.

[0040] In related technologies, after the cooling oil enters the third oil guide channel 31, it will first rush directly to the end of the third oil guide channel 31 away from the motor input shaft 20. If the speed of the motor input shaft 20 is too high at this time, more cooling oil will be thrown out from the end of the third oil guide channel 31 away from the motor input shaft 20. As a result, the amount of cooling oil distributed to the end of the third oil guide channel 31 facing the motor input shaft 20 will be relatively reduced, which will affect the lubrication effect on the rotor 40.

[0041] Combination Figure 1 In some embodiments, to ensure effective cooling of the rotor 40, the third oil guide channel 31 includes a first section 311 and a second section 312 connected to the first section 311, with the second section 312 communicating with the second oil guide channel 21. The diameter of the second section 312 is larger than the diameter of the second oil guide channel 21, and the diameter of the second section 312 is larger than the diameter of the first section 311.

[0042] The length of the second segment 312 is less than the length of the first segment 311.

[0043] Cooling oil enters the second oil guide channel 21 through the first oil guide channel 11, and then enters the second section 312 through the second oil guide channel 21. It then enters the first section 311 through the second section 312. During the process of the motor input shaft 20 driving the motor rotor shaft 30 to rotate, under the action of centrifugal force, the cooling oil will adhere to the inner wall of the first section 311 and the inner wall of the second section 312, and be thrown out through the first oil outlet 32 ​​so that the cooling oil enters the oil tank to cool the rotor 40. After the cooling oil enters the first section 311, since the diameter of the second section 312 is larger than the diameter of the second oil guide channel 21, and the diameter of the second section 312 is larger than the diameter of the first section 311, a first step will be formed between the second section 312 and the first section 311, and a second step will be formed between the second section 312 and the second oil guide channel 21. When the cooling oil flows back, it will pass over the first step and enter the second section 312. Due to the existence of the second step, the second step will block the cooling oil from flowing back to the second oil guide channel 21, so that the second section 312 can store the cooling oil. Therefore, when the rotor 40 needs to be cooled, the cooling oil will first rush directly into the first section 311, and the cooling oil stored in the second section 312 can be delivered to the rotor 40, so that the amount of cooling oil distributed at both ends of the third oil guide channel 31 is balanced, ensuring the cooling effect on the rotor 40.

[0044] In some embodiments, the first segment 311 and the second segment 312 are integrally formed. The integral forming eliminates the assembly gap between the first segment 311 and the second segment 312, avoids the risk of structural failure due to loosening or vibration, ensures the stability of the connection between the first segment 311 and the second segment 312, and the integral forming reduces the number of parts, simplifies the assembly steps, and reduces assembly time and labor costs.

[0045] Combination Figure 1 In some embodiments, to achieve sufficient cooling of the rotor, the first oil outlet 32 ​​includes a first sub-oil outlet 321 communicating with the first segment 311 and a second sub-oil outlet 322 communicating with the second segment 312, and the oil groove includes a first sub-oil groove and a second sub-oil groove. The first sub-oil outlet 321 and the second sub-oil outlet 322 are located on opposite sides of the rotor 40, with the first sub-oil outlet 321 communicating with the first sub-oil groove and the second sub-oil outlet 322 communicating with the second sub-oil groove.

[0046] When cooling of rotor 40 is required, cooling oil is first directly injected into the first section 311 and, under the action of centrifugal force, is thrown out through the first sub-oil outlet 321, so that the cooling oil discharged from the first sub-oil outlet 321 enters the first sub-oil tank to achieve cooling of rotor 40. Under the action of centrifugal force, the cooling oil stored in the second section 312 is thrown out through the second sub-oil outlet 322, so that the cooling oil discharged from the second sub-oil outlet 322 enters the second sub-oil tank to achieve cooling of rotor 40. This ensures that the amount of cooling oil distributed in the first sub-oil outlet 321 and the second sub-oil outlet 322 is balanced, guaranteeing the cooling effect of rotor 40, reducing the temperature of rotor core and magnets, and ensuring the normal operation of rotor.

[0047] In some embodiments, to achieve sufficient cooling of the rotor 40, there are multiple first sub-oil outlet holes 321, each corresponding to a multiple first sub-oil groove, and the first sub-oil outlet holes 321 are connected to the corresponding first sub-oil grooves. The first sub-oil outlet holes 321 can deliver cooling oil to the corresponding first sub-oil grooves. There are multiple second sub-oil outlet holes 322, each corresponding to a multiple second sub-oil groove, and the second sub-oil outlet holes 322 are connected to the corresponding second sub-oil grooves. The second sub-oil outlet holes 322 can deliver cooling oil to the corresponding second sub-oil grooves. By delivering cooling oil to the multiple first sub-oil grooves and multiple second sub-oil grooves of the rotor 40, the cooling oil can cover different areas of the rotor 40, preventing material degradation (such as insulation layer aging, permanent magnet demagnetization, etc.) caused by local overheating, ensuring the cooling effect of the rotor 40, and extending the service life of the rotor 40.

[0048] Combination Figure 1 In some embodiments, in order to further achieve sufficient cooling of the rotor 40, the first sub-oil outlet 321 is located between two adjacent second sub-oil outlets 322, and the first sub-oil groove is located between two adjacent second sub-oil grooves. It can be understood that the first sub-oil groove and the second sub-oil groove are located in different areas of the rotor 40. When the cooling oil enters the first sub-oil groove and the second sub-oil groove, the cooling oil can cover different areas of the rotor 40, preventing material degradation (such as insulation layer aging, permanent magnet demagnetization, etc.) caused by local overheating, ensuring the cooling effect of the rotor 40, and extending the service life of the rotor 40.

[0049] In some embodiments, in order to ensure that the oil output of the first sub-oil outlet 321 and the oil output of the second sub-oil outlet 322 are balanced, the diameter of the first sub-oil outlet 321 is smaller than the diameter of the second sub-oil outlet 322. Therefore, it can ensure that the amount of cooling oil entering the first sub-oil tank and the amount of cooling oil in the second sub-oil tank are balanced, thus ensuring the cooling effect on the rotor 40 and extending the service life of the rotor 40.

[0050] In some embodiments, in order to enable the motor input shaft 20 to rotate within the housing 10, an input shaft bearing 50 is provided within the housing 10. The input shaft bearing 50 is sleeved on the motor rotor shaft 30. The input shaft bearing 50 is closer to the motor rotor shaft 30 than the first oil guide channel 11. The input shaft bearing supports the motor input shaft 20 to ensure the stability of the motor input shaft 20 installation.

[0051] In some embodiments, along the radial direction of the motor rotor shaft 30, the projection of the input shaft bearing 50 on the housing 10 overlaps with the projection of the connection point of the motor input shaft 20 and the motor rotor shaft 30 on the housing 10, so that the input shaft bearing 50 can support the motor input shaft 20 and the motor rotor shaft 30, ensuring the stability of the motor input shaft 20 and the motor rotor shaft 30 installed in the housing 10.

[0052] Combination Figure 1 In some embodiments, in order to lubricate the input shaft bearing 50, the motor rotor shaft 30 is provided with a second oil outlet 33 that communicates with the second section 312, and the second oil outlet 33 is inclined along the direction from the second section 312 toward the input shaft bearing 50.

[0053] During the rotation of the motor rotor shaft 30 driven by the motor input shaft 20, under the action of centrifugal force, the cooling oil will adhere to the inner wall of the first section 311 and the inner wall of the second section 312, and be thrown out through the second oil outlet 33. Due to the inclined setting of the second oil outlet 33 along the direction from the second section 312 towards the input shaft bearing 50, the cooling oil can reach the input shaft bearing 50 to lubricate it, reduce wear, extend the service life of the input shaft bearing 50, and ensure the stable operation of the motor input shaft 20 and the motor rotor shaft 30.

[0054] Combination Figure 1 and Figure 2 In some embodiments, to avoid cooling oil loss, the second oil guide channel 21 includes a third segment 211 communicating with the third oil guide channel 31 and a fourth segment 212 communicating with the third segment 211. The fourth segment 212 is connected to the first oil guide channel 11. The diameter of the third segment 211 is larger than the diameter of the fourth segment 212.

[0055] Cooling oil enters the fourth section 212 through the first oil guide channel 11, and then enters the third section 211 through the fourth section 212. From there, it is transported to the third oil guide channel 31 to cool the rotor 40. After the cooling oil enters the third section 211 through the fourth section 212, a third step is formed between them because the diameter of the third section 211 is larger than that of the fourth section 212. This third step prevents the cooling oil from flowing back into the fourth section 212 after entering the third section 211, thus preventing it from flowing back through the gap between the housing 10 and the fourth section 212. This ensures that all the cooling oil distributed in the third oil guide channel 31 is used for cooling the rotor 40 and lubricating the input shaft bearing 50, without any loss of cooling oil, achieving full utilization of the cooling oil. The height of the third step can be 2mm.

[0056] In some embodiments, the third segment 211 and the fourth segment 212 are integrally formed. The integral forming eliminates the assembly gap between the third segment 211 and the fourth segment 212, avoids the risk of structural failure due to loosening or vibration, ensures the stability of the connection between the third segment and the fourth segment, and the integral forming reduces the number of parts, simplifies the assembly steps, and reduces assembly time and labor costs.

[0057] Based on the same inventive concept, this application also proposes an electric drive system that uses the aforementioned gearbox assembly. The specific structure of the gearbox assembly is as described in the above embodiments. Since it adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0058] Based on the same inventive concept, this application also proposes a vehicle that uses the electric drive system. The specific structure of the electric drive system is as described in the above embodiments. Since it uses all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0059] In the description of this application, 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., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0060] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0062] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0063] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A gearbox assembly, characterized in that, include: The casing has a first oil guide channel; The motor input shaft is rotatably disposed within the housing and has a second oil guide channel communicating with the first oil guide channel; The motor rotor shaft is rotatably disposed within the housing and connected to the motor input shaft. The motor rotor shaft has a third oil guide channel communicating with the second oil guide channel and a first oil outlet communicating with the third oil guide channel. The rotor is sleeved on the motor rotor shaft, and along the axial direction of the motor rotor shaft, the rotor has an oil groove that communicates with the first oil outlet hole.

2. The gearbox assembly according to claim 1, characterized in that, The third oil guide channel includes a first section and a second section connected to the first section, and the second section is in communication with the second oil guide channel; The diameter of the second segment is greater than the diameter of the second oil guide channel, and the diameter of the second segment is greater than the diameter of the first segment.

3. The gearbox assembly according to claim 2, characterized in that, The first oil outlet includes a first sub-oil outlet communicating with the first segment and a second sub-oil outlet communicating with the second segment; the oil trough includes a first sub-oil trough and a second sub-oil trough. The first sub-oil outlet and the second sub-oil outlet are located on opposite sides of the rotor. The first sub-oil outlet is connected to the first sub-oil groove, and the second sub-oil outlet is connected to the second sub-oil groove.

4. The gearbox assembly according to claim 3, characterized in that, There are multiple first sub-oil outlet holes, and each of the multiple first sub-oil outlet holes corresponds one-to-one with a multiple first sub-oil groove. The first sub-oil outlet hole is connected to the corresponding first sub-oil groove. There are multiple second sub-oil outlet holes, and each of the multiple second sub-oil outlet holes corresponds one-to-one with a multiple second sub-oil groove. The second sub-oil outlet hole is connected to the corresponding second sub-oil groove.

5. The gearbox assembly according to claim 4, characterized in that, The first sub-oil outlet is located between two adjacent second sub-oil outlets, and the first sub-oil groove is located between two adjacent second sub-oil grooves.

6. The gearbox assembly according to claim 3, characterized in that, The diameter of the first sub-oil outlet is smaller than the diameter of the second sub-oil outlet.

7. The gearbox assembly according to claim 2, characterized in that, An input shaft bearing is provided inside the housing, and the input shaft bearing is sleeved on the motor rotor shaft; The motor rotor shaft has a second oil outlet hole that communicates with the second section, and the oil outlet hole is inclined along the direction from the second section toward the input shaft bearing.

8. The gearbox assembly according to any one of claims 1-7, characterized in that, The second oil guiding channel includes a third segment communicating with the third oil guiding channel and a fourth segment connected to the third segment, wherein the fourth segment is communicating with the first oil guiding channel; The diameter of the third segment is greater than the diameter of the fourth segment.

9. An electric drive system, characterized in that, Includes the gearbox assembly as described in any one of claims 1-8.

10. A vehicle, characterized in that, Includes the electric drive system for the gearbox assembly as described in claim 9.

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