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, rotatablely is located in the casing, and is seted up with mounting hole channel, motor rotor shaft, rotatablely is located in the casing, and is connected with the inner wall of mounting hole channel, along the axial direction of motor rotor shaft, motor rotor shaft sets up with second oil guide channel, along the radial direction of motor rotor shaft, motor rotor shaft sets up with the first oil outlet hole that communicates with second oil guide channel, oil guide pipe, is worn in mounting hole channel, and is located in second oil guide channel, and the both ends of oil guide pipe are communicated with first oil guide channel and second oil guide channel respectively, wherein, along the radial direction of oil guide pipe, oil guide pipe sets up with second oil outlet hole, along the radial direction of motor input shaft, the projection of second oil outlet hole falls in the junction of motor rotor shaft and the inner wall of mounting hole channel.

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, the oil inlet of the motor shaft is from the rear end cover side, which results in a larger Y-axis dimension of the entire electric drive system and affects its compatibility. 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 the large Y-axis dimension of the electric drive system affecting its adaptability.

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

[0006] A gearbox assembly includes: a housing having a first oil guide channel; a motor input shaft rotatably disposed within the housing and having a mounting hole; a motor rotor shaft rotatably disposed within the housing and connected to the inner wall of the mounting hole, the motor rotor shaft having a second oil guide channel along its axial direction and a first oil outlet hole communicating with the second oil guide channel along its radial direction; and an oil guide pipe passing through the mounting hole and disposed within the second oil guide channel, the two ends of the oil guide pipe communicating with the first oil guide channel and the second oil guide channel, respectively; wherein, the oil guide pipe has a second oil outlet hole along its radial direction, and the projection of the second oil outlet hole along the radial direction of the motor input shaft falls at the connection between the motor rotor shaft and the inner wall of the mounting hole.

[0007] In some embodiments, the oil guide tube includes: a first section passing through the mounting hole; and a second section connected to the first section and located within the second oil guide channel, wherein the second section has a second oil outlet hole.

[0008] In some embodiments, the outer surface of the second segment has a plane, which is spaced apart from the inner wall of the second oil channel, and the second oil outlet is located on the plane.

[0009] In some embodiments, an input shaft bearing is provided inside the housing, the input shaft bearing is sleeved on the motor input shaft, and the input shaft bearing is closer to the first oil guide channel than the motor rotor shaft; wherein, the oil guide pipe is spaced apart from the first oil guide channel.

[0010] In some embodiments, the gearbox assembly further includes a rotor connected to the motor rotor shaft, and the rotor has an oil groove along the axial direction of the motor rotor shaft; wherein the oil groove communicates with the first oil outlet.

[0011] In some embodiments, the first oil outlet includes a first sub-oil outlet and a second sub-oil outlet, and the oil trough includes a first sub-oil trough and a second sub-oil trough; 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 connected to the first sub-oil trough, and the second sub-oil outlet is connected to the second sub-oil trough.

[0012] In some embodiments, the gearbox assembly further includes: a support member sleeved on the oil guide pipe and disposed within the mounting channel; a seal member sleeved on the support member; a connector sleeved on the oil guide pipe and interference-fitted with the inner wall of the mounting channel; a limiting member connected to the end of the oil guide pipe and located outside the mounting channel, the limiting member abutting against the end of the motor input shaft facing the first oil guide channel; and a plurality of buckles connected to the oil guide pipe and disposed within the mounting channel; wherein the mounting channel has a mounting groove, and the buckles are engaged in the mounting groove.

[0013] In some embodiments, the connector includes a plurality of spaced-apart connecting portions.

[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 an installation hole. The motor rotor shaft is rotatably mounted inside the housing and connected to the inner wall of the installation hole. Therefore, the motor input shaft can drive the motor rotor shaft to rotate. Along the axial direction of the motor rotor shaft, a second oil guide channel is provided. Along the radial direction of the motor rotor shaft, a first oil outlet hole communicating with the second oil guide channel is provided. An oil guide pipe passes through the installation hole and is located within the second oil guide channel. Both ends of the oil guide pipe are connected to the first and second oil guide channels respectively. Along the radial direction of the oil guide pipe, a second oil outlet hole is provided. Along the radial direction of the motor input shaft, the projection of the second oil outlet hole falls at the connection point between the motor rotor shaft and the inner wall of the installation hole. Therefore, cooling oil can enter the oil guide pipe through the first oil guide channel. When the cooling oil reaches the second oil outlet, a portion of the cooling oil is discharged from the second oil outlet to lubricate the connection between the motor rotor shaft and the inner wall of the mounting hole, reducing wear, extending the service life of the motor input shaft and the motor rotor shaft, and ensuring the stable operation of the motor rotor shaft. Part of the lubricating oil in the oil guide pipe enters the second oil guide channel and is discharged from the first oil outlet to reach the rotor, cooling the rotor, reducing the temperature of the rotor core and magnets, and ensuring the normal operation of the rotor. Since the oil guide pipe introduces the cooling oil from the gearbox side into the second 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, the Y-axis dimension of the electric drive system can be reduced, and the installation compatibility of the electric drive system can be improved. Attached Figure Description

[0018] 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.

[0019] Figure 1 These are schematic diagrams of the transmission assembly in some embodiments;

[0020] Figure 2 for Figure 1 A schematic diagram of the oil guide pipe of the intermediate gearbox assembly;

[0021] Figure 3 for Figure 2 Cross-sectional view of the central guide pipe;

[0022] Figure 4 for Figure 2 Side view of the central guide pipe.

[0023] In the attached image:

[0024] Housing 10, first oil guide channel 11;

[0025] Motor input shaft 20, mounting hole 21, mounting groove 22;

[0026] Motor rotor shaft 30, second oil guide channel 31, first oil outlet 32, first sub-oil outlet 321, second sub-oil outlet 322;

[0027] Oil guide tube 40, second oil outlet 41, first section 42, second section 43, plane 431;

[0028] Input shaft bearing 50;

[0029] Rotor 60;

[0030] Support component 70;

[0031] Seals;

[0032] Connector 80, connecting part 81;

[0033] Limiting component 90;

[0034] Deduct 100. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] This application is described below with reference to the accompanying drawings and specific embodiments:

[0040] The transmission assembly, electric drive system, and vehicle provided in this embodiment aim to at least partially solve the technical problem of the large Y-axis dimension of the electric drive system affecting its adaptability.

[0041] Combination Figure 1 The gearbox assembly in this embodiment includes a housing 10, a motor input shaft 20, a motor rotor shaft 30, and an oil guide pipe 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 mounting hole 21. The motor rotor shaft 30 is rotatably disposed within the housing 10 and connected to the inner wall of the mounting hole 21. A second oil guide channel 31 is provided along the axial direction of the motor rotor shaft 30, and a first oil outlet hole 32 communicating with the second oil guide channel 31 is provided along the radial direction of the motor rotor shaft 30. The oil guide pipe 40 passes through the mounting hole 21 and is disposed within the second oil guide channel 31. Both ends of the oil guide pipe 40 are respectively connected to the first oil guide channel 11 and the second oil guide channel 31. Along the radial direction of the oil guide pipe 40, the oil guide pipe 40 is provided with a second oil outlet hole 41. Along the radial direction of the motor input shaft 20, the projection of the second oil outlet hole 41 falls on the connection between the motor rotor shaft 30 and the inner wall of the mounting channel 21.

[0042] 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 mounting hole 21, and the motor rotor shaft 30 is rotatably disposed within the housing 10 and connected to the inner wall of the mounting hole 21, the motor input shaft 20 can drive the motor rotor shaft 30 to rotate. Because the motor rotor shaft 30 has a second oil guide channel 31 along its axial direction and a first oil outlet hole 32 communicating with the second oil guide channel 31 along its radial direction, the oil guide pipe 40 passes through the mounting hole 21 and is disposed within the second oil guide channel 31. Both ends of the oil guide pipe 40 are respectively connected to the first oil guide channel 11 and the second oil guide channel 31. Along the radial direction of the oil guide pipe 40, a second oil outlet hole 41 is provided. Along the radial direction of the motor input shaft 20, the projection of the second oil outlet hole 41 falls on the motor rotor shaft 30 and the mounting hole. At the connection between the inner wall of the mounting channel 21 and the oil guide pipe 40, the cooling oil can enter the oil guide pipe 40 through the first oil guide channel 11. When the cooling oil reaches the second oil outlet 41, part of the cooling oil is discharged from the second oil outlet 41 to lubricate the connection between the motor rotor shaft 30 and the inner wall of the mounting channel 21, reduce wear, extend the service life of the motor input shaft 20 and the motor rotor shaft 30, and ensure the stable operation of the motor rotor shaft 30. Part of the lubricating oil in the oil guide pipe 40 enters the second oil guide channel 31 and is discharged from the first oil outlet 32 ​​to reach the rotor 60 to cool the rotor 60, reduce the temperature of the rotor core and magnets, and ensure the normal operation of the rotor 60. Since the oil guide pipe 40 introduces the cooling oil from the gearbox side into the second 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, the Y-axis dimension of the electric drive system can be reduced, and the configurability of the electric drive system can be improved.

[0043] In some embodiments, the inner wall of the mounting channel 21 has an internal spline, and the outer wall of the motor rotor shaft 30 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.

[0044] 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.

[0045] 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 40 is controlled by the flow regulating valve to ensure that there is enough cooling oil to cool the rotor 60, reduce the temperature of the rotor core and magnets, and ensure the normal operation of the rotor 60.

[0046] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, to facilitate oil guiding, the oil guide tube 40 includes a first section 42 and a second section 43. The first section 42 passes through the mounting hole 21. The second section 43 is connected to the first section 42 and is located within the second oil guiding channel 31, and the second section 43 has a second oil outlet hole 41.

[0047] Cooling oil can enter the first section 42 through the first oil guide channel 11, and then enter the second section 43 from the first section 42. When the cooling oil reaches the second oil outlet 41, a portion of the cooling oil is discharged from the second oil outlet 41 to cool and lubricate the connection between the motor rotor shaft 30 and the inner wall of the mounting hole 21, reduce wear, extend the service life of the motor input shaft 20 and the motor rotor shaft 30, and ensure the stable operation of the motor rotor shaft 30. A portion of the lubricating oil in the oil guide pipe 40 enters the second oil guide channel 31 and is discharged from the first oil outlet 32 ​​to reach the rotor 60 to cool the rotor 60, reduce the temperature of the rotor core and magnets, and ensure the normal operation of the rotor 60. Since the first section 42 and the second section 43 introduce cooling oil from the gearbox side into the second 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, the Y-axis dimension of the electric drive system can be reduced, and the configurability of the electric drive system can be improved.

[0048] Combination Figure 2 and Figure 4 In some embodiments, in order to ensure that there is enough cooling oil to lubricate the connection between the motor rotor shaft 30 and the inner wall of the mounting hole 21, the outer surface of the second section 43 has a plane 431, the plane 431 is spaced apart from the inner wall of the second oil guide channel 31, and the second oil outlet 41 is located on the plane 431.

[0049] Due to the presence of plane 431, the distance between the second segment 43 and the inner wall of the second oil guide channel 31 can be increased compared to the circular second segment 43. Furthermore, because plane 431 and the inner wall of the second oil guide channel 31 are spaced apart, there is a distance between plane 421 and the inner wall of the second oil guide channel 31, increasing the volume of the space between plane 431 and the inner wall of the second oil guide channel 31 that can accommodate cooling oil. Since the second oil outlet 41 is located on plane 431, there is sufficient space to accommodate the cooling oil when it enters the cooling oil space through the second oil outlet 41. When the cooling oil lubricates the connection between the motor rotor shaft 30 and the inner wall of the mounting hole 21, there is sufficient cooling oil in the cooling oil space to lubricate the connection between the motor rotor shaft 30 and the inner wall of the mounting hole 21, reducing wear, extending the service life of the motor input shaft 20 and the motor rotor shaft 30, and ensuring the stable operation of the motor rotor shaft 30.

[0050] Combination Figure 1 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 is sleeved on the motor input shaft 20, and the input shaft bearing 50 is closer to the first oil guide channel 11 than the motor rotor shaft 30. The oil guide pipe 40 is spaced apart from the first oil guide channel 11.

[0051] As the cooling oil enters the oil guide pipe 40 through the first oil guide channel 11, some oil will flow back to the gap between the oil guide pipe 40 and the first oil guide channel 11 due to the interval between them. Under the action of gravity, the oil will then flow into the bottom of the input shaft bearing 50 to lubricate it, reduce wear, extend its service life, and ensure its stable operation.

[0052] In some embodiments, in order to ensure that some oil flows back to the gap between the oil guide pipe 40 and the first oil guide channel 11, the distance between the oil guide pipe 40 and the first oil guide channel 11 can be 0.1mm to 0.8mm.

[0053] Combination Figure 1 In some embodiments, to achieve cooling of the rotor 60, the gearbox assembly further includes a rotor 60. The rotor 60 is connected to the motor rotor shaft 30, and an oil groove is formed on the rotor 60 along the axial direction of the motor rotor shaft 30. The oil groove communicates with the first oil outlet 32. The rotor 60 can be sleeved on the motor rotor shaft 30.

[0054] When the cooling oil enters the second oil guide channel 31, it will be discharged through the first oil outlet 32. Since the oil tank is connected to the first oil outlet 32, the cooling oil discharged through the first oil outlet 32 ​​can enter the oil tank. The cooling oil entering the oil tank can cool the rotor 60, reduce the temperature of the rotor core and magnets, and ensure the normal operation of the rotor.

[0055] Combination Figure 1 In some embodiments, to achieve sufficient cooling of the rotor 60, the first oil outlet 32 ​​includes a first sub-oil outlet 321 and a second sub-oil outlet 322. 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 60, 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.

[0056] When the cooling oil enters the second oil guide channel 31, it will be discharged through the first sub-oil outlet 321 and the second sub-oil outlet 322. Since the first sub-oil outlet 321 is connected to the first sub-oil trough and the second sub-oil outlet 322 is connected to the second sub-oil trough, the cooling oil discharged through the first sub-oil outlet 321 and the second sub-oil outlet 322 can enter the first oil trough and the second sub-oil trough respectively. The cooling oil entering the first oil trough and the second sub-oil trough can cool the rotor 60, reduce the temperature of the rotor core and magnets, and ensure the normal operation of the rotor.

[0057] In some embodiments, there are multiple first sub-oil outlet holes 321 and multiple first sub-oil grooves. Each of the multiple first oil outlet holes 321 corresponds to a single first sub-oil groove, and the first oil outlet hole 321 is connected to the corresponding first sub-oil groove. There are multiple second sub-oil outlet holes 322 and multiple second sub-oil grooves. Each of the multiple second oil outlet holes 322 corresponds to a single second sub-oil groove, and the second oil outlet hole 322 is connected to the corresponding second sub-oil groove. The second oil outlet hole 322 is located between two adjacent first oil outlet holes 321. It can be understood that the second sub-oil groove is located between two adjacent first sub-oil grooves so that the cooling oil can cool different areas of the rotor 60, ensuring the cooling effect on the rotor.

[0058] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4In some embodiments, to facilitate the installation of the oil guide pipe 40, the gearbox assembly further includes: a support member 70, a seal, a connector 80, a limiting member 90, and multiple buckles 100. The support member 70 is fitted onto the oil guide pipe 40 and is disposed within the mounting channel 21. The seal is fitted onto the support member 70. The connector 80 is fitted onto the oil guide pipe 40 and is press-fitted to the inner wall of the mounting channel 21. The limiting member 90 is connected to the end of the oil guide pipe 40 and is located outside the mounting channel 21, abutting against the end of the motor input shaft 20 facing the first oil guide channel 11. Multiple buckles 100 are connected to the oil guide pipe 40 and are disposed within the mounting channel 21. The mounting channel 21 has a mounting groove 22, and the buckles 100 are engaged in the mounting groove 22.

[0059] When installing the oil guide pipe 40 into the mounting channel 21, the sealing element is fitted onto the support 70 to install the sealing element. The support 70 is fitted onto the oil guide pipe 40, and the support 70 and the oil guide pipe 40 are inserted together into the mounting channel 21. The support 70 abuts against the inner wall of the mounting channel 21 to support the oil guide pipe 40. At the same time, the sealing element can seal the gap between the support 70 and the mounting channel 21 to prevent the cooling oil in the second oil guide channel 31 from leaking into the mounting channel 21. During the insertion of the oil guide pipe 40 into the mounting channel 21, the oil guide pipe 40 can be pressed until the limiting element 90 abuts against the end of the motor input shaft 20 facing the first oil guide channel 11 to limit the insertion and prevent the oil guide pipe 40 from being over-inserted, ensuring that the installation position of the oil guide pipe 40 is determined. When the limiting member 90 abuts against the end of the motor input shaft 20 facing the first oil guide channel 11, multiple buckles 100 are engaged in the mounting groove 22. When the oil guide tube 40 moves towards the first oil guide channel 11, the groove wall of the mounting groove 22 limits the multiple buckles 100, thereby limiting the oil guide tube 40 and preventing it from falling out of the mounting hole 21, thus ensuring the stability of the oil guide tube 40 installation. Because the connector 80 is interference-fitted with the inner wall of the mounting hole 21, the outer diameter of the connector 80 is larger than the inner diameter of the mounting hole 21, generating radial pressure that makes the two fit tightly together, forming a mechanical lock. This prevents the connector 80 from loosening or falling out under force, thus ensuring the stability of the oil guide tube 40 installed in the mounting hole 21. Moreover, the interference fit eliminates the need for additional bolts, nuts, and other fasteners, simplifying the assembly process and reducing the number of parts.

[0060] In some embodiments, the seal may be an O-ring. A groove is provided on the circumferential surface of the support 70 so that the O-ring can be fitted into the groove, thereby enabling the installation of the O-ring.

[0061] In some embodiments, in order to reduce the pressing force, the connector 80 includes a plurality of spaced connecting portions 81. Compared with a full circular structure, the connecting portions 81 can be compressed and deformed, and the connection between the connector 80 and the inner wall of the mounting hole 21 can be achieved with a smaller force, which facilitates assembly and improves installation efficiency.

[0062] In some embodiments, one end of the buckle 100 is rotatably connected to the oil guide tube 40. There is an elastic element between the buckle 100 and the outer wall of the oil guide tube 40. The buckle 100 can switch between an open state and a closed state. When the oil guide tube 40 is not installed into the mounting channel 21, the buckle 100 is in an open state and the elastic element is extended. At this time, the ends of the multiple buckles 100 away from the oil guide tube 40 can be arranged in a circle, and the diameter of the circle is larger than the diameter of the mounting channel 21. During the process of inserting the oil guide tube 40 into the mounting channel 21, the inner wall of the mounting channel 21 applies pressure to the end of the buckle 100 that is away from the oil guide tube 40 to compress the elastic element. At this time, the multiple buckles 100 are in a retracted state. When the end of the buckle 100 that is away from the oil guide tube 40 reaches the mounting groove 22, the extended part of the elastic element, under the action of the elastic restoring force of the elastic element, allows the end of the buckle 100 that is away from the oil guide tube 40 to be inserted into the mounting groove 22, so that the end of the buckle 100 that is away from the oil guide tube 40 abuts against the groove wall of the mounting groove 22. The groove wall of the mounting groove 22 limits the multiple buckles 100 to limit the oil guide tube 40, thereby preventing the oil guide tube 40 from falling out of the mounting channel 21 and ensuring the stability of the installation of the oil guide tube 40.

[0063] In some embodiments, the support member 70 is located at the connection between the first section 42 and the second section 43 of the oil guide tube 40 to ensure the stability of the oil guide tube 40.

[0064] In some embodiments, the connector 80 and the limiting member 90 are integrally formed. The integral forming eliminates the assembly gap between the connector 80 and the limiting member 90, avoids the risk of structural failure due to loosening or vibration, and ensures the stability of the connection between the connector 80 and the limiting member 90. Moreover, the integral forming reduces the number of parts, simplifies the assembly steps, and reduces assembly time and labor costs.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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 an installation channel. The motor rotor shaft is rotatably disposed within the housing and connected to the inner wall of the mounting channel. Along the axial direction of the motor rotor shaft, the motor rotor shaft has a second oil guide channel. Along the radial direction of the motor rotor shaft, the motor rotor shaft has a first oil outlet hole communicating with the second oil guide channel. An oil guide pipe is inserted through the mounting hole and located within the second oil guide channel. Both ends of the oil guide pipe are connected to the first oil guide channel and the second oil guide channel, respectively. The oil guide pipe has a second oil outlet hole along its radial direction, and the projection of the second oil outlet hole falls on the connection between the motor rotor shaft and the inner wall of the mounting channel along its radial direction.

2. The gearbox assembly according to claim 1, characterized in that, The oil guide tube includes: The first section passes through the mounting channel; The second section is connected to the first section and located within the second oil guide channel, and the second section has a second oil outlet hole.

3. The gearbox assembly according to claim 2, characterized in that, The outer surface of the second segment has a plane, which is spaced apart from the inner wall of the second oil guide channel, and the second oil outlet is located on the plane.

4. The gearbox assembly according to any one of claims 1-3, characterized in that, An input shaft bearing is provided inside the housing. The input shaft bearing is sleeved on the motor input shaft. The input shaft bearing is closer to the first oil guide channel than the motor rotor shaft. The oil guide pipe is spaced apart from the first oil guide channel.

5. The gearbox assembly according to any one of claims 1-3, characterized in that, The gearbox assembly also includes a rotor connected to the motor rotor shaft, and the rotor has an oil groove along the axial direction of the motor rotor shaft; The oil trough is connected to the first oil outlet hole.

6. The gearbox assembly according to claim 5, characterized in that, The first oil outlet includes a first sub-oil outlet and a second sub-oil outlet, and the oil trough includes a first sub-oil trough and a second 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.

7. The gearbox assembly according to any one of claims 1-3, characterized in that, The transmission assembly also includes: A support member is fitted onto the oil guide pipe and disposed within the mounting hole; A sealing element is fitted onto the support element; The connector is sleeved on the oil guide pipe and has an interference fit with the inner wall of the mounting hole; A limiting member is connected to the end of the oil guide pipe and located outside the mounting hole. The limiting member abuts against the end of the motor input shaft facing the first oil guide channel. Multiple undercuts are connected to the oil guide pipe and are located within the mounting channel; The mounting hole has a mounting groove, and the buckle is engaged in the mounting groove.

8. The gearbox assembly according to claim 7, characterized in that, The connector includes multiple spaced-apart connecting parts.

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.

Images