Planetary row lubrication structure, hybrid electric drive assembly and vehicle

Abstract

The application discloses a planetary row lubricating structure, a hybrid electric drive assembly and a vehicle, and solves the technical problem of poor lubricating effect of the prior art. The planetary row lubricating structure provided by the application adopts an active lubricating scheme, the sun gear shaft of the planetary row is provided with a first hollow cavity penetrating in the axial direction, the planet carrier of the planetary row is provided with an oil collecting cavity, the first hollow cavity, the oil collecting cavity and a lubricating channel of the planetary row are sequentially communicated, and an oil guide pipe is penetratingly installed in the interior of the sun gear shaft of the planetary row. Through the arrangement of the oil guide pipe, in the case that the axial oil guide channel is relatively long, the oil guide pipe is used to transmit the oil product from the lubricating oil inlet at the far end of the planetary row to the planet carrier of the planetary row, the situation that the oil is thrown out by the centrifugal force formed by the high-speed rotation of the sun gear shaft and cannot reach the planetary row can be avoided, the lubricating oil circulates in the lubricating channel, the bearings of each planetary gear are lubricated, and the safety problem of the whole vehicle caused by the ablation of the whole planetary row is avoided.

Description

Technical Field

[0001] This application belongs to the technical field of planetary gear transmission devices, specifically relating to a planetary gear lubrication structure, a hybrid electric drive assembly, and a vehicle. Background Technology

[0002] Planetary gear sets are key components for power distribution in current hybrid vehicles. Proper lubrication is crucial for their normal operation. However, in practice, improper lubrication design frequently leads to sintering of the entire planetary gear set. Sintering causes excessive surface pressure on the needle roller bearings, planetary gears, and sun gear shaft, ultimately resulting in tooth breakage and significant vibration, preventing power transmission and affecting vehicle performance. Therefore, a well-designed lubrication system for planetary gear sets is of paramount importance.

[0003] Current planetary gear set lubrication structures mostly employ oil-stirring lubrication. For example, the utility model patent "Planetary Gear Set Power System, Hybrid Power System and Vehicle" (publication number CN210686923U) discloses a planetary gear set power system, including an engine, an electric motor, a planetary gear set housing assembly, and a planetary gear set disposed within the planetary gear set housing assembly. One of the planet carrier, sun gear, and ring gear of the planetary gear set is connected to the engine, one to the electric motor, and one to the system output shaft. A transmission component connected to the ring gear is also connected to a lubrication pump, and a transmission component connected to the generator or electric motor is also connected to an oil-stirring component. Lubrication of the planetary gear set by the oil-stirring component solves the problem of poor lubrication performance in some operating modes. However, the oil-stirring lubrication scheme requires an additional oil-stirring component, resulting in a complex structure and poor lubrication effect at the planetary gears. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this application provides a planetary gear lubrication structure, a hybrid electric drive assembly, and a vehicle, which have a simple structure and good lubrication effect.

[0005] The technical solution adopted to achieve the purpose of this application is a planetary gear lubrication structure, comprising:

[0006] The planetary gear set is provided with a lubrication channel, the outlet of which faces the planetary gear bearing of the planetary gear set; the sun gear shaft of the planetary gear set is provided with a first hollow cavity that runs through the axis, and the planet carrier of the planetary gear set is provided with an oil collecting cavity; the first hollow cavity, the oil collecting cavity, and the lubrication channel are connected in sequence.

[0007] An oil guide pipe is installed through the first hollow cavity, with its end near the planetary gear set extending into the oil collecting cavity.

[0008] In some embodiments, the planetary carrier includes a planetary carrier shaft, a connecting plate, and a planetary gear shaft connected in sequence. The planetary carrier shaft is provided with the oil collection chamber and a first oil guide hole that are connected in communication, and the planetary gear shaft is provided with a second oil guide hole.

[0009] An oil guide is provided on the outer side of the connecting plate; the first oil guide hole, the gap between the oil guide and the connecting plate, and the second oil guide hole are connected in sequence to form the lubrication channel.

[0010] In some embodiments, the second oil guide hole includes an axial oil guide hole extending axially along the planetary gear shaft and at least one radial oil guide hole extending radially along the planetary gear shaft, the outlet of the radial oil guide hole constituting the outlet of the lubrication channel.

[0011] In some embodiments, a first planetary carrier bearing is mounted on the planetary carrier shaft, and the first planetary carrier bearing is disposed in the lubrication channel; a second planetary carrier bearing is mounted on the planetary carrier shaft; the planetary carrier shaft is provided with a third oil guide hole communicating with the oil collecting cavity, and the outlet of the third oil guide hole faces the second planetary carrier bearing; an intermediate bearing is provided between the planetary carrier shaft and the sun gear shaft, and the internal clearance of the intermediate bearing communicates with the first hollow cavity.

[0012] In some embodiments, the oil guide is annular, and the portion of the oil guide sleeved outside the planetary carrier shaft is in contact with the connecting plate and / or the planetary gear shaft near the outer ring.

[0013] In some embodiments, the oil guide tube is provided with a plurality of oil outlet holes spaced apart along the axial and / or radial direction of the oil guide tube.

[0014] In some embodiments, the inner diameter of the first hollow cavity is larger than the outer diameter of the oil guide pipe, so as to form an annular oil storage cavity between the oil guide pipe and the cavity wall of the first hollow cavity; the oil outlet is connected to the oil storage cavity.

[0015] In some embodiments, the planetary gear set further includes an internal gear ring shaft rotatably mounted on the sun gear shaft; the oil reservoir has an enlarged section, the enlarged section corresponding to the axial position of the internal gear ring shaft.

[0016] In some embodiments, a support bearing is installed between the sun gear shaft and the internal gear ring shaft, and the sun gear shaft is provided with a fourth oil guide hole, the outlet of the fourth oil guide hole facing the support bearing.

[0017] In some embodiments, the distal planetary gear end of the oil guide tube is provided with an oil outlet; the oil outlet is a U-shaped groove and / or a round hole.

[0018] In some embodiments, at least one bushing is fitted onto the oil guide tube.

[0019] In some embodiments, the planetary gear set lubrication structure further includes a mechanical pump; the near-planetary gear set end of the oil guide pipe is drivenly connected to the planet carrier, and the far-planetary gear set end of the oil guide pipe is drivenly connected to the rotor of the mechanical pump.

[0020] In some embodiments, the near planetary set end of the oil guide tube is keyed to the planetary carrier, and the far planetary set end of the oil guide tube is connected to the rotor flat end of the mechanical pump.

[0021] In some embodiments, the planetary carrier is provided with an internal spline, and the oil guide tube near the planetary set end is provided with an external spline, and the oil guide tube near the planetary set end is connected to the planetary carrier spline.

[0022] In some embodiments, the internal spline is disposed on the cavity wall of the oil collecting cavity; the internal spline is integrally formed on the planetary carrier, or the internal spline is fixedly connected to the planetary carrier.

[0023] Based on the same inventive concept, this application also provides a hybrid electric drive assembly, comprising:

[0024] The housing assembly is equipped with an oil inlet channel;

[0025] The aforementioned planetary gear lubrication structure is installed inside the housing assembly, and the first hollow cavity of the planetary gear lubrication structure is connected to the oil inlet channel.

[0026] In some embodiments, the hybrid electric drive assembly further includes a motor assembly connected to the housing assembly, wherein the rotor of the motor assembly has a second hollow cavity that extends axially; the oil inlet channel, the second hollow cavity and the first hollow cavity are connected in sequence, and the oil guide pipe is installed in the second hollow cavity and the first hollow cavity.

[0027] In some embodiments, the housing assembly includes a right housing, a left housing, and an end cover connected in sequence. The right housing and the left housing together form a gear mounting cavity, and the left housing and the end cover together form a motor mounting cavity. The planetary gear set is located in the gear mounting cavity, and the motor assembly is located in the motor mounting cavity. The oil inlet channel is located in the end cover.

[0028] Based on the same inventive concept, this application also provides a vehicle including the aforementioned hybrid electric drive assembly.

[0029] As can be seen from the above technical solution, the planetary gear set lubrication structure provided in this application adopts an active lubrication scheme. Specifically, the sun gear shaft of the planetary gear set has a first hollow cavity that runs through the axis, and the planet carrier of the planetary gear set has an oil collecting cavity. The first hollow cavity, the oil collecting cavity, and the lubrication channel of the planetary gear set are connected in sequence, and the outlet of the lubrication channel faces the planet gear bearing of the planetary gear set. The oil guide pipe is installed inside the sun gear shaft of the planetary gear set, and the end of the oil guide pipe near the planetary gear set extends into the oil collecting cavity. By setting the oil guide pipe, when the axial oil guide channel is relatively long, the oil guide pipe is used to transfer the lubricating oil from the lubricating oil inlet at the far end of the planetary gear set to the planet carrier of the planetary gear set. This can avoid the situation where the oil is thrown out by the centrifugal force generated by the high-speed rotation of the sun gear shaft and cannot reach the planetary gear set. Furthermore, the oil guide pipe extending into the oil collecting cavity near the planetary gear set can reduce the amount of lubricating oil leakage at the gap between the sun gear shaft and the planet carrier. The lubricating oil flows through the lubrication channels and eventually reaches the planetary gear bearings, lubricating each planetary gear bearing and ensuring sufficient lubrication to prevent the entire planetary gear set from burning out, which could lead to vehicle safety issues. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the planetary gear lubrication structure in Embodiments 1 and 3 of this application.

[0031] Figure 2 This is a schematic diagram of the planetary gear set in the planetary gear set lubrication structure of Embodiments 1 and 3 of this application.

[0032] Figure 3 This is a schematic diagram of the planetary gear lubrication structure in Embodiments 2 and 4 of this application.

[0033] Figure 4 This is an overall structural diagram of the hybrid electric drive assembly in Embodiments 3 and 4 of this application.

[0034] Figure 5 for Figure 4 A schematic diagram of the hybrid electric drive assembly after the right housing has been removed.

[0035] Figure 6 for Figure 4 A schematic diagram of the hybrid electric drive assembly after the end caps have been removed.

[0036] Explanation of reference numerals in the attached drawings: 10-oil guide pipe, 11-oil outlet hole, 12-oil outlet port, 13-external spline; 20-oil guide component; 30-bulb; 40-planetary gear bearing; 50-first planetary carrier bearing; 60-second planetary carrier bearing; 70-support bearing; 80-intermediate bearing; 90-mechanical pump, 91-rotor, 92-flat mouth.

[0037] 100-Planetary gear set; 110-Sun gear shaft; 111-First hollow cavity; 1111-Oil reservoir; 1112-Expanded bore section; 112-Fourth oil guide hole; 113-Bearing mounting groove; 120-Planet carrier; 121-Planet carrier shaft; 122-Connecting plate; 123-Planet gear shaft; 124-Oil collection cavity; 1241-Large bore section; 1242-Small bore section; 125-First oil guide hole; 126-Second oil guide hole; 1261-Axial oil guide hole; 1262-Radial oil guide hole; 127-Third oil guide hole; 130-Sun gear; 140-Planet gear; 150-Internal gear ring; 160-Lubrication channel; 170-Internal spline.

[0038] 1000 - Hybrid electric drive assembly; 200 - Internal gear ring shaft; 300 - Housing assembly; 301 - Oil inlet channel; 302 - Shaft gear mounting cavity; 303 - Motor mounting cavity; 310 - Right housing; 320 - Left housing; 330 - End cover; 400 - Motor assembly; 410 - Rotor; 411 - Second hollow cavity; 500 - Gear shifting mechanism assembly; 600 - Intermediate shaft gear assembly; 700 - Differential assembly; 800 - Controller assembly. Detailed Implementation

[0039] To enable those skilled in the art to better understand this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Example 1:

[0041] This embodiment provides a planetary gear set lubrication structure that employs an active lubrication scheme. (See [link]). Figure 1 and Figure 2 The planetary gear set lubrication structure includes a planetary gear set 100 and an oil guide pipe 10. The planetary gear set 100 has a lubrication channel 160, and the sun gear shaft 110 of the planetary gear set 100 has a first hollow cavity 111 extending axially. The sun gear shaft 110 can be integrally formed with the sun gear 130 of the planetary gear set 100, or keyed. In this embodiment, the sun gear shaft 110 and the sun gear 130 are integrally formed. The planet carrier 120 of the planetary gear set 100 has an oil collecting chamber 124. The first hollow cavity 111, the oil collecting chamber 124, and the lubrication channel 160 are sequentially connected, and the outlet of the lubrication channel 160 faces the planetary gear bearing 40 of the planetary gear set 100. The oil guide pipe 10 is installed through the sun gear shaft 110 of the planetary gear set 100, specifically through the first hollow cavity 111, with the end of the oil guide pipe 10 near the planetary gear set 100 extending into the oil collecting chamber 124.

[0042] Production practice has revealed that the main lubrication requirement of the planetary gear set 100 lies in the planetary gear bearings 40. On the one hand, there are many planetary gear bearings 40, which are widely distributed. On the other hand, since the installation position of the planetary gear bearings 40 is located in the area enclosed by the planetary carrier 120 and between the planetary gears 140 and the planetary gear shaft 123, the lubricating oil is difficult to enter the installation position of the planetary gear bearings 40 due to the obstruction of the planetary gears 140 and the planetary carrier 120. As a result, the planetary gear bearings 40 are prone to burning, which affects the use of the entire planetary gear set 100. The planetary gear set lubrication structure provided in this embodiment, by setting up an oil guide pipe 10, allows lubricating oil to be transferred from the lubricating oil inlet at the distal end of the planetary gear set 100 to the planet carrier 120 of the planetary gear set 100 when the axial oil guide channel is relatively long. This avoids the situation where the oil is thrown out by the centrifugal force generated by the high-speed rotation of the sun gear shaft 110 and fails to reach the planetary gear set 100. Furthermore, the end of the oil guide pipe 10 near the planetary gear set extends into the oil collection chamber 124, which can reduce the amount of lubricating oil leakage at the gap between the sun gear shaft 110 and the planet carrier 120. The lubricating oil flows in the lubrication channel 160 and finally flows to the planet gear bearings 40, lubricating the bearings of each planet gear 140, ensuring sufficient oil volume for the bearings, and avoiding vehicle safety problems caused by the burning of the entire planetary gear set 100.

[0043] Specifically, the lubrication channel 160 of the planetary carrier 120 can be an oil passage formed in the base material of the planetary carrier 120, or it can be an oil passage formed by external components, as long as it can deliver lubricating oil to the mounting location of the planetary gear bearing 40. In this embodiment, the planetary gear bearing 40 is a needle roller bearing, specifically a full complement needle roller bearing or a steel cage needle roller bearing. The planetary gear bearing 40 adopts a double row needle roller bearing with a spacer in the middle. The spacer should form a gap with the planetary gear shaft 123 in the radial direction to ensure that lubricating oil can enter the needle roller bearing and lubricate the roller surface of the needle roller bearing.

[0044] Please see Figure 1In this embodiment, the planetary carrier 120 includes a planetary carrier shaft 121, a connecting plate 122, and a plurality of planetary gear shafts 123 connected in sequence. Planetary gears 140 are fitted onto the planetary gear shafts 123. Planetary gear bearings 40 are installed between the planetary gears 140 and the planetary gear shafts 123. The two sides of the planetary gears 140 mesh with the gears of the sun gear 130 and the gears of the internal gear ring 150, respectively, through gears. The planetary carrier shaft 121 is located at the center of the connecting plate 122, and the planetary gear shafts 123 are evenly distributed circumferentially around the planetary carrier shaft 121. The planetary carrier shaft 121 and the connecting plate 122 can be detachably connected by threaded fasteners, snap-fit ​​structures, etc., or fixed by welding, or the planetary carrier shaft 121 and the connecting plate 122 can be an integral structure. In this embodiment, the planetary carrier shaft 121 is press-fitted onto the connecting plate 122. The connecting plate 122 and the planetary gear shaft 123 can also be detachably connected by threaded fasteners, snap-fit ​​structures, etc., or fixed by welding, or the connecting plate 122 and the planetary gear shaft 123 can be an integral structure, which is not limited in this application. The overall external shape and outline of the planetary carrier 120 are also not limited in this application. For example, the planetary carrier 120 can adopt a cage structure.

[0045] Specifically, the planetary carrier shaft 121 is provided with a connected oil collecting chamber 124 and a first oil guide hole 125. The oil collecting chamber 124 is located at the center of the planetary carrier shaft 121, preferably coaxial with the planetary carrier shaft 121. The planetary gear shaft 123 is provided with a second oil guide hole 126, the outlet of which faces the planetary gear bearing 40 of the planetary gear set 100. An oil guide member 20 is provided on the outer side of the connecting plate 122. The first oil guide hole 125, the gap between the oil guide member 20 and the connecting plate 122, and the second oil guide hole 126 are connected in sequence to form a lubrication channel 160. The oil guide member 20 guides the lubricating oil thrown out of the first oil guide hole 125 in the oil collecting chamber 124 under centrifugal force to the second oil guide hole 126.

[0046] In this embodiment, an intermediate bearing 80 is provided between the planetary carrier shaft 121 and the sun gear shaft 110. The intermediate bearing 80 is a thrust bearing, which can withstand a large axial force. One end of the sun gear shaft 110 rests against the planetary carrier shaft 121 through this thrust bearing. The thrust bearing can meet the working requirements of the planetary gear set 100 under certain operating conditions where there is a speed difference between the planetary carrier 120 and the sun gear shaft 110. The intermediate bearing 80 is specifically located at the end of the sun gear shaft 110. In some embodiments, a concave bearing mounting groove 113 can be provided at the end of the sun gear shaft 110. The bearing mounting groove 113 communicates with the first hollow cavity 111, thereby allowing the internal clearance of the intermediate bearing 80 to communicate with the first hollow cavity 111, and the lubricating oil in the first hollow cavity 111 can enter the intermediate bearing 80.

[0047] See Figure 2The intermediate bearing 80 is sleeved outside the oil guide pipe 10, meaning that the intermediate bearing 80 is at a certain axial distance from the oil outlet of the oil guide pipe 10. The sun gear shaft 110 and the planet carrier 120 are connected by the intermediate bearing 80. Due to axial manufacturing and processing errors in the housing assembly 300, planet carrier 120, sun gear shaft 110, etc., there will be a certain gap between the intermediate bearing 80 on the end side of the sun gear shaft 110 and the planet carrier shaft 121. Under certain extreme conditions, the lubricating oil flowing into this part will leak out in large quantities through this gap. By embedding an oil guide pipe 10 inside the sun gear shaft 110 and sleeved outside the oil guide pipe 10, it can be ensured that as much lubricating oil in the sun gear shaft 110 as possible is guided into the oil collection chamber 124 of the planet carrier 120.

[0048] The oil guide 20 is annular and is sleeved around the planetary carrier shaft 121, specifically, it is loosely sleeved on the outside of the planetary carrier shaft 121. The portion of the oil guide 20 near the outer ring is in contact with the connecting plate 122 and / or the planetary gear shaft 123, so that the lubricating oil thrown towards the outer periphery of the planetary gear set 100 by centrifugal force is blocked by the oil guide 20 and collects on the inner side of the contact point between the oil guide 20 and the planetary gear shaft 123. Along the radial direction of the planetary gear set 100, the contact point between the oil guide 20 and the planetary gear shaft 123 should be located outside the inlet of the second oil guide hole 126, so that the lubricating oil collected on the inner side of the contact point between the oil guide 20 and the planetary gear shaft 123 can enter the second oil guide hole 126. Specifically, in this embodiment, the portion of the oil guide 20 near the outer ring is in contact with the portion of the connecting plate 122 located outside the planetary gear shaft 123. In some embodiments, the oil guide 20 can be configured as a disc-shaped ring structure, such that the inner disc surface of the oil guide 20 is inclined relative to both the axial and radial directions, which can guide the lubricating oil to a certain extent and ensure that as much lubricating oil as possible enters the second oil guide hole 126.

[0049] The second oil guide hole 126 can be a channel extending radially and / or axially along the planetary gear shaft 123, or it can be a channel extending circumferentially along the planetary gear shaft 123. That is, the second oil guide hole 126 can be an axial straight channel, a radial straight channel, an oblique straight channel, a curved channel, etc., and this application does not impose any limitations. Specifically, in this embodiment, the second oil guide hole 126 includes an axial oil guide hole 1261 extending axially along the planetary gear shaft 123 and at least one radial oil guide hole 1262 extending radially along the planetary gear shaft 123. The outlet of the radial oil guide hole 1262 constitutes the outlet of the lubrication channel 160. The number of radial oil guide holes 1262 is determined by the size of the planetary gear bearing 40, and is usually set to two or more. The outlets of the two or more radial oil guide holes 1262 are spaced apart and evenly distributed along the circumferential surface of the planetary gear shaft 123. For example, the second oil guide hole 126 includes an axial oil guide hole 1261 extending axially along the planetary gear shaft 123 and four radial oil guide holes 1262 extending radially along the planetary gear shaft 123. The four radial oil guide holes 1262 are distributed at 90° to each other to ensure that the oil reaches the planetary gear bearing 40 and to avoid the entire planetary gear set 100 from sintering due to insufficient lubrication of the planetary gear bearing 40. In some embodiments, the inlet of the axial oil guide hole 1261 is set as a flared opening, preferably a circular flared opening, to reduce flow resistance. Along the axial direction of the planetary gear shaft 123, the diameter of the flared opening gradually increases from the middle to the end, which facilitates the entry of lubricating oil into the axial oil guide hole 1261.

[0050] In some embodiments, a first planetary carrier bearing 50 is mounted on the planetary carrier 120. The first planetary carrier bearing 50 is disposed in a lubrication channel 160, and the internal clearance of the first planetary carrier bearing 50 communicates with the lubrication channel 160 to allow lubricating oil to flow. See also Figure 1 and Figure 2 The first planetary carrier bearing 50 is mounted on the planetary carrier shaft 121 and is close to the connecting plate 122 of the planetary carrier 120. The first planetary carrier bearing 50 is a thrust bearing. The loose ring of the thrust bearing contacts the connecting plate 122, and the tight ring of the thrust bearing is connected to and / or in contact with an external fixing component (e.g., the housing assembly 300 for mounting the planetary gear set 100), thereby axially stabilizing the planetary gear set. A channel for lubricating oil flow is formed between the loose and tight rings, and the lubricating oil also lubricates the rollers of the thrust bearing as it flows between them. Of course, in other embodiments, the first planetary carrier bearing 50 can be positioned at other locations on the planetary carrier 120, completely separated from the lubrication channel 160, to avoid flow resistance generated by the internal structure of the first planetary carrier bearing 50.

[0051] In some embodiments, to improve the rotational stability of the planetary carrier 120, a second planetary carrier bearing 60 is also installed on the planetary carrier shaft 121. The second planetary carrier bearing 60 is a needle roller bearing, for example, the planetary carrier 120 is mounted in the housing assembly 300 (specifically the right housing 310) via the second planetary carrier bearing 60. The second planetary carrier bearing 60 also requires lubrication during operation. For this purpose, the planetary carrier shaft 121 is provided with a third oil guide hole 127 communicating with the oil collection chamber 124, and the outlet of the third oil guide hole 127 faces the second planetary carrier bearing 60. In general, the oil collection chamber 124 is required to accommodate the end of the oil guide tube 10 near the planetary set 100 and store a certain amount of oil to be delivered to the third oil guide hole 127. Considering that the second planetary carrier bearing 60 requires less lubricating oil than the planetary gear bearing 40, in order to ensure sufficient oil supply to the planetary gear bearing 40, in some embodiments, the oil collection chamber 124 has a stepped hole structure, with its large hole section 1241 used to accommodate the end of the oil guide pipe 10 near the planetary gear set 100, and the small hole section 1242 connected to the third oil guide hole 127.

[0052] Considering that several bearings are typically installed on the drive shaft (sun gear shaft 110, planet carrier shaft 121, or internal gear ring shaft 200) of the planetary gear set 100, in order to meet the lubrication requirements of these bearings, in some embodiments, the oil guide pipe 10 is provided with several oil outlet holes 11 spaced apart along the axial and / or radial direction of the oil guide pipe 10. Along the axial direction of the oil guide pipe, there are usually multiple oil outlet holes 11, and the diameter and spacing of each oil outlet hole 11 are the same. Multiple oil outlet holes 11 located at the same axial position can also be provided, and these multiple oil outlet holes 11 located at the same axial position are circumferentially spaced apart, so that the oil can flow evenly into the first hollow cavity 111 of the sun gear shaft 110. Additional oil outlet holes 11 can also be provided at the axial position of the oil guide pipe 10 corresponding to the bearing installation position.

[0053] The oil guide tube 10 and the first hollow cavity 111 of the sun gear shaft 110 can be fitted with a clearance, or the inner diameter of the first hollow cavity 111 can be much larger than the outer diameter of the oil guide tube 10. For example, the radius difference between the inner diameter of the first hollow cavity 111 and the outer diameter of the oil guide tube 10 is 0.1 to 10 mm, preferably 0.5 to 3 mm. Since the inner diameter of the first hollow cavity 111 is larger than the outer diameter of the oil guide tube 10, an annular oil reservoir 1111 is formed between the oil guide tube 10 and the cavity wall of the first hollow cavity 111. The oil outlet 11 of the oil guide tube 10 is connected to the oil reservoir 1111, thereby uniformly guiding part of the oil in the oil guide tube 10 to the oil reservoir 1111. The oil in the oil reservoir 1111 can lubricate the external components of the sun gear shaft 110 through the oil hole on the sun gear shaft 110.

[0054] Specifically, in this embodiment, the planetary gear set 100 further includes an internal gear ring shaft 200 rotatably mounted on the sun gear shaft 110. The internal gear ring 150 of the planetary gear set 100 is fixedly connected to the internal gear ring shaft 200. Specifically, the internal gear ring 150 can be integrally formed on the internal gear ring shaft 200, or the internal gear ring 150 can be welded, keyed, or press-fitted to the main body of the internal gear ring shaft 200. The oil reservoir 1111 has an enlarged section 1112, which corresponds to the axial position of the internal gear ring shaft 200.

[0055] The internal gear ring shaft 200 needs to rotate during operation, therefore it also needs to be equipped with a bearing. This bearing can be fitted onto the outer circumference of the internal gear ring shaft 200 or embedded in the inner circumference of the internal gear ring shaft 200. Specifically, in this embodiment, a support bearing 70 is installed between the sun gear shaft 110 and the internal gear ring shaft 200. The inner ring of the support bearing is fitted onto the sun gear shaft 110, and the internal gear ring shaft 200 is fitted onto the outer ring of the support bearing. The sun gear shaft 110 is provided with a fourth oil guide hole 112, which communicates with the oil reservoir 1111, and the outlet of the fourth oil guide hole 112 faces the support bearing 70.

[0056] Since the inner diameter of the first hollow cavity 111 is larger than the outer diameter of the oil guide tube 10, in order to ensure that the oil guide tube 10 is stably installed in the first hollow cavity 111, in some embodiments, at least one bushing 30 is fitted on the oil guide tube 10, and the bushing 30 fills the gap between the oil guide tube 10 and the cavity wall of the first hollow cavity 111. The bushing 30 serves to support the oil guide tube 10, and the bushing 30 is made of copper or composite plastic.

[0057] In some embodiments, the distal planetary gear set 100 end of the oil guide pipe 10 is provided with one or more oil outlets 12. Since the oil outlets 12 are formed on the pipe wall of the oil guide pipe 10, oil can be discharged radially, reducing resistance and facilitating the entry of oil into the lubrication channel 160. The oil outlets 12 can be configured as slots with openings or complete holes, such as U-shaped slots or round holes. The number of oil outlets 12 is not limited in this application. For example, if the number of oil outlets 12 is set to 3, the shapes of the 3 oil outlets 12 can be the same or different.

[0058] Therefore, the planetary gear set lubrication structure provided in this application embodiment pumps lubricating oil into the oil guide pipe 10 through an external oil pump (e.g., an electronic oil pump). The long pipe structure guides the oil, preventing the lubricating oil from not fully reaching the interior of the planetary gear set 100 due to the centrifugal force of high-speed operation. The design of the oil guide plate ensures that the oil enters the interior of the planetary gear shaft 123 of the planetary gear set 100 and flows to the planetary gear bearing 40. During the operation of the planetary gear set 100, the lubricating oil can also flow to the meshing point of the planetary gear 140 with the internal gear ring 150 and the sun gear 130, thus fully lubricating the entire planetary gear set 100.

[0059] Example 2:

[0060] Based on the same inventive concept, this embodiment provides another planetary gear lubrication structure, see [link to previous document]. Figure 3 The planetary gear set lubrication structure also includes a planetary gear set 100 and an oil guide pipe 10. The planetary gear set 100 has a sun gear shaft 110 with a first hollow cavity 111 extending axially. The planet carrier 120 of the planetary gear set 100 has an oil collecting chamber 124 and a lubrication channel 160. The first hollow cavity 111, the oil collecting chamber 124, and the lubrication channel 160 are sequentially connected, and the outlet of the lubrication channel 160 faces the planetary gear bearing 40 of the planetary gear set 100. The oil guide pipe 10 is installed through the sun gear shaft 110 of the planetary gear set 100, specifically through the first hollow cavity 111, with the end of the oil guide pipe 10 near the planetary gear set 100 extending into the oil collecting chamber 124.

[0061] Unlike Embodiment 1, in this embodiment, the planetary gear set lubrication structure further includes a mechanical pump 90. The end of the oil guide pipe 10 near the planetary gear set 100 is driven to the planet carrier 120, and the end of the oil guide pipe 10 away from the planetary gear set 100 is driven to the rotor 91 of the mechanical pump 90. Therefore, when the planet carrier 120 of the planetary gear set 100 rotates, the planet carrier 120 can drive the oil guide pipe 10 to rotate because the end of the oil guide pipe 10 near the planetary gear set 100 is driven to the planet carrier 120. Since the end of the oil guide pipe 10 away from the planetary gear set 100 is driven to the rotor 91 of the mechanical pump 90, the oil guide pipe 10 can drive the rotor 91 of the mechanical pump 90 to rotate, causing the mechanical pump 90 to operate and thus providing the lubricating oil required by the planetary gear set 100, achieving active lubrication.

[0062] The transmission connection between the oil guide pipe 10 and the planetary carrier 120 and the rotor 91 of the mechanical pump 90 can adopt any structure in the prior art that can realize mechanical transmission, such as key connection, gear meshing, welding fixation, special shape fit, etc., and this application does not impose any restrictions. In this embodiment, the end of the oil guide pipe 10 near the planetary set 100 is keyed to the planetary carrier 120, which can be a flat key connection, spline connection, etc. Specifically, the planetary carrier 120 is provided with an internal spline 170, and the end of the oil guide pipe 10 near the planetary set 100 is provided with an external spline 13. Then the end of the oil guide pipe 10 near the planetary set 100 is splined to the planetary carrier 120. The internal spline 170 is specifically set on the cavity wall of the oil collecting cavity 124. The internal spline 170 and the body of the planetary carrier 120 can be integrally formed. In some embodiments, the internal spline 170 and the planetary carrier 120 can also be fixedly connected by welding, press fitting, etc.

[0063] The distal planetary gear set 100 end of the oil guide pipe 10 is connected to the flat end 92 of the rotor 91 of the mechanical pump 90. Specifically, there may be only one flat end 92 in the circumferential direction, or multiple flat ends 92 may be spaced apart in the circumferential direction to form a special shape that is approximately polygonal. This allows the distal planetary gear set 100 end of the oil guide pipe 10 to be circumferentially positioned with respect to the rotor 91 of the mechanical pump 90, thus transmitting torque. Other undescribed structures of the planetary gear set lubrication structure provided in this embodiment can be referred to in Embodiment 1, and will not be repeated here.

[0064] Therefore, the planetary gear set lubrication structure provided in this application embodiment does not require an external oil pump. The rotor 91 of the mechanical pump 90 is driven to rotate by the planetary carrier 120 through the oil guide pipe 10, which pressurizes the oil and pumps the lubricating oil into the oil guide pipe 10. Compared with an electric pump, the mechanical pump 90 does not require additional electrical energy; it can pump oil using the mechanical energy of the planetary carrier 120, thus reducing energy consumption. The use of a long pipe structure for oil guiding prevents the lubricating oil from failing to fully reach the interior of the planetary gear set 100 due to the centrifugal force of high-speed rotation. The design of the oil guide plate ensures that the oil enters the interior of the planetary gear shafts 123 of the planetary gear set 100 and flows to the planetary gear bearings 40. During the operation of the planetary gear set 100, the lubricating oil can also flow to the meshing points of the planetary gears 140 with the internal gear ring 150 and the sun gear 130, fully lubricating the entire planetary gear set 100.

[0065] Example 3:

[0066] Based on the same inventive concept, this embodiment provides a hybrid electric drive assembly 1000, see [link to previous document]. Figure 1 , Figure 2 , Figures 4 to 6 The system includes a housing assembly 300 and the planetary gear lubrication structure of Embodiment 1 described above. The housing assembly 300 has an oil inlet channel 301. The planetary gear lubrication structure is installed inside the housing assembly 300, and the first hollow cavity 111 of the planetary gear lubrication structure communicates with the oil inlet channel 301 of the housing assembly 300. Lubricating oil is supplied with circulation power by an oil pump, which can be located inside or outside the housing assembly 300. In some embodiments, other oil pumps, such as engine oil pumps, can also be used to provide pumping pressure.

[0067] The hybrid electric drive assembly 1000 also includes a motor assembly 400, which may include a generator and / or a drive motor as needed. The motor assembly 400 is connected to the housing assembly 300 and can be installed inside the housing assembly 300 or located outside the housing assembly 300. In this embodiment, the motor assembly 400 is encapsulated within the housing assembly 300, and the lubricating oil introduced through the oil inlet channel 301 of the housing assembly 300 can also be used to cool the stator of the motor assembly 400. Typically, for independently operating motors, a cooling cavity needs to be provided in the motor housing to circulate a cooling medium to cool the motor stator. In this embodiment, since the motor assembly 400 is encapsulated within the housing assembly 300, there is no need for the motor housing required for an independent motor, simplifying the motor structure, reducing the weight of the hybrid electric drive assembly 1000, and improving the integration and vehicle compatibility of the hybrid electric drive assembly 1000.

[0068] Specifically, in this embodiment, the rotor 410 of the motor assembly 400 is provided with a second hollow cavity 411 that runs through the axial direction. The oil inlet channel 301, the second hollow cavity 411 and the first hollow cavity 111 are connected in sequence. The rotor 410 of the motor assembly 400 is coaxially arranged with the planetary gear set 100. The lubricating oil introduced by the oil inlet channel 301 of the housing assembly 300 is introduced into the first hollow cavity 111 of the planetary gear set 100 through the second hollow cavity 411. The oil guide pipe 10 of the planetary gear set lubrication structure is installed in the second hollow cavity 411 and the first hollow cavity 111. The end of the oil guide pipe 10 far from the planetary gear set 100 is directly connected to the oil inlet channel 301 of the housing assembly 300, and the end of the oil guide pipe 10 near the planetary gear set 100 is directly connected to the oil collection cavity 124 of the planetary carrier 120. By connecting the rotor 410 of the motor assembly 400 in series with the internal oil circuit of the planetary gear 100, the rotor of the motor acts as a pipeline for lubricating oil, which simplifies the structure of the lubrication system and improves the integration and vehicle compatibility of the hybrid electric drive assembly 1000.

[0069] In this embodiment, the housing assembly 300 includes a right housing 310, a left housing 320, and an end cover 330 connected in sequence. The right housing 310 and the left housing 320 together form a gear mounting cavity 302, in which the planetary gear set 100 is located. The left housing 320 and the end cover 330 together form a motor mounting cavity 303, in which the motor assembly 400 is located. Specifically, the planetary carrier shaft 121 is supported on the right housing 310 by a first planetary carrier bearing 50 and a second planetary carrier bearing 60. The sun gear shaft 110 is supported by two support bearings 70, which are installed in the inner hole of the internal gear ring shaft 200. The end of the sun gear shaft 110 abuts against the planetary carrier shaft 121 by an intermediate bearing 80. The rotor 410 of the motor assembly 400 is a bushing structure. The rotor 410 is connected to the sun gear shaft 110 by a spline, and the rotor 410 is supported on the left housing 320 and the end cover 330 by two bearings.

[0070] The oil inlet channel 301 is located in the end cover 330, and the bottom of the left housing 320 forms an oil pan. The lubricating oil after lubricating the planetary gear set 100 falls into the oil pan. The external oil pump provides the pumping power, so that the lubricating oil circulates in the oil pan, the oil inlet channel 301, the oil guide pipe 10, and the lubrication channel 160.

[0071] In some embodiments, the hybrid electric drive assembly 1000 further includes a shift mechanism assembly 500, an intermediate shaft gear assembly 600, a differential assembly 700, and a controller assembly 800. The shift mechanism assembly 500, intermediate shaft gear assembly 600, and differential assembly 700 are all located in the shaft gear mounting cavity 302. The shift mechanism assembly 500 and intermediate shaft gear assembly 600 cooperate with the planetary gear set 100 to realize gear shifting and transmission functions. Power is output to the wheel axle system by the differential assembly 700. The controller assembly 800 is mounted outside the housing assembly 300 and is used to control the operation of the motor assembly 400 and / or the shift mechanism assembly 500. The controller assembly 800 can also control the operation of the oil pump and some electronic devices such as sensors (temperature sensors, pressure sensors, etc.) installed inside the hybrid electric drive assembly 1000. For details regarding the gear shifting mechanism assembly 500, the intermediate shaft gear assembly 600, and the controller assembly 800, please refer to the relevant public disclosures in the prior art; they will not be elaborated upon here.

[0072] In summary, since the hybrid electric drive assembly 1000 of this embodiment is equipped with the planetary gear lubrication structure of Embodiment 1, it has all the technical effects of the planetary gear lubrication structure of Embodiment 1. Furthermore, based on the structural design of the housing assembly 300 and the motor assembly 400 in the hybrid electric drive assembly 1000 of this embodiment, the hybrid electric drive assembly 1000 of this embodiment also has the advantages of high integration, high reliability, and high vehicle compatibility.

[0073] Example 4:

[0074] Based on the same inventive concept, this embodiment provides another hybrid electric drive assembly 1000, see [link to documentation]. Figures 3 to 6 The system includes a housing assembly 300 and the planetary gear set lubrication structure described in Embodiment 2 above. The housing assembly 300 is provided with an oil inlet channel 301. The planetary gear set lubrication structure is installed inside the housing assembly 300. The internal oil passages of the mechanical pump 90 of the planetary gear set lubrication structure are connected to the oil inlet channel 301 and the first hollow cavity 111 of the planetary gear set 100. An oil pan is formed at the bottom of the inner cavity of the housing assembly 300. When the planet carrier 120 of the planetary gear set 100 rotates, the planet carrier 120 drives the oil guide pipe 10 to rotate, which in turn drives the rotor 91 of the mechanical pump 90 to rotate, thereby making the mechanical pump 90 run and providing pump oil pressure. The lubricating oil circulates in the oil inlet channel 301, the internal oil passages of the mechanical pump 90, the oil guide pipe 10, the lubrication channel 160, and the oil pan, achieving active lubrication.

[0075] The hybrid electric drive assembly 1000 also includes a motor assembly 400, which may include a generator and / or a drive motor as needed. The motor assembly 400 is connected to the housing assembly 300 and can be installed inside the housing assembly 300 or located outside the housing assembly 300. In this embodiment, the motor assembly 400 is encapsulated within the housing assembly 300, and the lubricating oil pumped in by the mechanical pump 90 can also be used to cool the stator of the motor assembly 400. Typically, for independently operating motors, a cooling cavity needs to be provided in the motor housing to circulate a cooling medium to cool the motor stator. In this embodiment, since the motor assembly 400 is encapsulated within the housing assembly 300, there is no need for the motor housing required for an independent motor, simplifying the motor structure, reducing the weight of the hybrid electric drive assembly 1000, and improving the integration and vehicle compatibility of the hybrid electric drive assembly 1000.

[0076] Specifically, in this embodiment, the rotor 410 of the motor assembly 400 is provided with a second hollow cavity 411 that runs through the axial direction. The oil guide pipe 10 is installed in the second hollow cavity 411 and the first hollow cavity 111, and is connected to the rotor 91 of the mechanical pump 90 in a transmission connection. The oil guide pipe 10 is connected to the internal oil passage of the mechanical pump 90. The oil inlet channel 301, the internal oil passage of the mechanical pump 90, the second hollow cavity 411, and the first hollow cavity 111 are sequentially connected. The rotor 410 of the motor assembly 400 is coaxially arranged with the planetary gear set 100. The lubricating oil introduced through the oil inlet channel 301 of the housing assembly 300 is introduced into the first hollow cavity 111 of the planetary gear set 100 via the second hollow cavity 411. The oil guide pipe 10 of the planetary gear set lubrication structure is installed in the second hollow cavity 411 and the first hollow cavity 111. The end of the oil guide pipe 10 far from the planetary gear set 100 is directly connected to the oil inlet channel 301 of the housing assembly 300, and the end of the oil guide pipe 10 near the planetary gear set 100 is directly connected to the oil collection chamber 124 of the planetary carrier 120. By connecting the rotor 410 of the motor assembly 400 and the internal oil passage of the planetary gear set 100 in series, the rotor of the motor acts as the pipeline for lubricating oil, which simplifies the lubrication system structure and improves the integration and vehicle compatibility of the hybrid electric drive assembly 1000.

[0077] In this embodiment, the housing assembly 300 includes a right housing 310, a left housing 320, and an end cap 330 connected in sequence. The right housing 310 and the left housing 320 together form a gear mounting cavity 302, in which the planetary gear set 100 is located. The left housing 320 and the end cap 330 together form a motor mounting cavity 303, in which the motor assembly 400 is located. An oil inlet channel 301 is provided in the end cap 330. An oil pan is formed at the bottom of the left housing 320. The lubricating oil after lubricating the planetary gear set 100 falls into the oil pan and is pumped by a mechanical pump 90. The mechanical pump 90 can be located inside or outside the housing assembly 300. The lubricating oil circulates in the oil pan, the oil inlet channel 301, the internal oil passage of the mechanical pump 90, the oil guide pipe 10, and the lubrication channel 160.

[0078] In some embodiments, the hybrid electric drive assembly 1000 further includes a shift mechanism assembly 500, an intermediate shaft gear assembly 600, a differential assembly 700, and a controller assembly 800. The shift mechanism assembly 500, intermediate shaft gear assembly 600, and differential assembly 700 are all located in the shaft gear mounting cavity 302. The shift mechanism assembly 500 and intermediate shaft gear assembly 600 cooperate with the planetary gear set 100 to realize gear shifting and transmission functions. Power is output to the wheel axle system by the differential assembly 700. The controller assembly 800 is mounted outside the housing assembly 300 and is used to control the operation of the motor assembly 400 and / or the shift mechanism assembly 500. The controller assembly 800 can also control the operation of the oil pump and some electronic devices such as sensors (temperature sensors, pressure sensors, etc.) installed inside the hybrid electric drive assembly 1000. For details regarding the gear shifting mechanism assembly 500, the intermediate shaft gear assembly 600, and the controller assembly 800, please refer to the relevant public disclosures in the prior art; they will not be elaborated upon here.

[0079] In summary, since the hybrid electric drive assembly 1000 of this embodiment is equipped with the planetary gear lubrication structure of embodiment 2, it has all the technical effects of the planetary gear lubrication structure of embodiment 2. Furthermore, based on the structural design of the housing assembly 300 and the motor assembly 400 in the hybrid electric drive assembly 1000 of this embodiment, the hybrid electric drive assembly 1000 of this embodiment also has the advantages of high integration, high reliability, and high vehicle compatibility.

[0080] Example 5:

[0081] Based on the same inventive concept, this embodiment provides a vehicle including a hybrid electric drive assembly 1000 of embodiment 3 or embodiment 4. The specific structure of the hybrid electric drive assembly 1000 refers to that of embodiment 3 or embodiment 4 above. Since the hybrid electric drive assembly 1000 adopts all the technical solutions of embodiment 3 or embodiment 4 above, it has at least all the beneficial effects brought about by the technical solutions of embodiment 3 or embodiment 4 above, which will not be described in detail here.

[0082] 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.

[0083] 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 planetary gear set lubrication structure, characterized in that, include: A planetary gear set includes a lubrication channel with its outlet facing the planetary gear bearings. The sun gear shaft of the planetary gear set has a first hollow cavity extending axially, and the planet carrier of the planetary gear set has an oil collecting chamber. The first hollow cavity, the oil collecting chamber, and the lubrication channel are sequentially connected. The planet carrier includes a planet carrier shaft, a connecting plate, and planetary gear shafts connected sequentially. An intermediate bearing is provided between the planet carrier shaft and the sun gear shaft, and the internal clearance of the intermediate bearing communicates with the first hollow cavity. Axially, the intermediate bearing is located at the end of the sun gear shaft, and one end of the sun gear shaft abuts against the planet carrier shaft via the intermediate bearing. An oil guide pipe is installed through the first hollow cavity, with its end near the planetary gear set extending into the oil collection cavity; the oil guide pipe transfers lubricating oil from the lubricating oil inlet at the far planetary gear set end to the planet carrier; the intermediate bearing is sleeved outside the oil guide pipe, and the intermediate bearing has an axial distance from the oil outlet of the oil guide pipe.

2. The planetary gear set lubrication structure as described in claim 1, characterized in that: The planetary carrier shaft is provided with the oil collection chamber and the first oil guide hole connected together, and the planetary gear shaft is provided with the second oil guide hole; An oil guide is provided on the outer side of the connecting plate; the first oil guide hole, the gap between the oil guide and the connecting plate, and the second oil guide hole are connected in sequence to form the lubrication channel.

3. The planetary gear set lubrication structure as described in claim 2, characterized in that: The second oil guide hole includes an axial oil guide hole extending along the axial direction of the planetary gear shaft and at least one radial oil guide hole extending radially along the planetary gear shaft, the outlet of the radial oil guide hole constituting the outlet of the lubrication channel.

4. The planetary gear set lubrication structure as described in claim 2, characterized in that: A first planetary carrier bearing is mounted on the planetary carrier shaft and is located in the lubrication channel; a second planetary carrier bearing is mounted on the planetary carrier shaft; the planetary carrier shaft is provided with a third oil guide hole communicating with the oil collection chamber, and the outlet of the third oil guide hole faces the second planetary carrier bearing.

5. The planetary gear set lubrication structure as described in claim 2, characterized in that: The oil guide is annular, and the portion of the oil guide is sleeved outside the planetary carrier shaft, with the portion near the outer ring in contact with the connecting plate and / or the planetary gear shaft.

6. The planetary gear set lubrication structure as described in claim 1, characterized in that: The oil guide pipe is provided with a number of oil outlet holes that are spaced apart along the axial and / or radial direction of the oil guide pipe.

7. The planetary gear set lubrication structure as described in claim 6, characterized in that: The inner diameter of the first hollow cavity is larger than the outer diameter of the oil guide pipe, so as to form an annular oil storage cavity between the oil guide pipe and the cavity wall of the first hollow cavity; the oil outlet is connected to the oil storage cavity.

8. The planetary gear set lubrication structure as described in claim 7, characterized in that: The planetary gear set also includes an internal gear ring shaft rotatably mounted on the sun gear shaft; the oil reservoir has an enlarged section, the enlarged section corresponding to the axial position of the internal gear ring shaft.

9. The planetary gear set lubrication structure as described in claim 8, characterized in that: A support bearing is installed between the sun gear shaft and the internal gear ring shaft. The sun gear shaft is provided with a fourth oil guide hole, and the outlet of the fourth oil guide hole faces the support bearing.

10. The planetary gear set lubrication structure as described in any one of claims 1-9, characterized in that: The oil guide pipe has an oil outlet at the far planetary gear end; the oil outlet is a U-shaped groove and / or a round hole.

11. The planetary gear set lubrication structure as described in any one of claims 1-9, characterized in that: At least one bushing is fitted onto the oil guide pipe.

12. The planetary gear set lubrication structure as described in any one of claims 1-9, characterized in that: The planetary gear set lubrication structure also includes a mechanical pump; the near-planetary gear set end of the oil guide pipe is connected to the planet carrier, and the far-planetary gear set end of the oil guide pipe is connected to the rotor of the mechanical pump.

13. The planetary gear set lubrication structure as described in claim 12, characterized in that: The near planetary gear set end of the oil guide pipe is keyed to the planetary carrier, and the far planetary gear set end of the oil guide pipe is connected to the rotor flat end of the mechanical pump.

14. The planetary gear set lubrication structure as described in claim 13, characterized in that: The planetary carrier is provided with an internal spline, and the oil guide tube is provided with an external spline at the end near the planetary set. The end of the oil guide tube near the planetary set is connected to the spline of the planetary carrier.

15. The planetary gear set lubrication structure as described in claim 14, characterized in that: The internal spline is located on the wall of the oil collecting cavity; the internal spline is integrally formed on the planetary carrier, or the internal spline is fixedly connected to the planetary carrier.

16. A hybrid electric drive assembly, characterized in that, include: The housing assembly is equipped with an oil inlet channel; The planetary gear lubrication structure according to any one of claims 1-15 is installed inside the housing assembly, and the first hollow cavity of the planetary gear lubrication structure is in communication with the oil inlet channel.

17. The hybrid electric drive assembly as described in claim 16, characterized in that: The hybrid electric drive assembly also includes a motor assembly connected to the housing assembly, the rotor of the motor assembly having a second hollow cavity that extends axially; the oil inlet channel, the second hollow cavity and the first hollow cavity are connected in sequence, and the oil guide pipe is installed in the second hollow cavity and the first hollow cavity.

18. The hybrid electric drive assembly as described in claim 17, characterized in that: The housing assembly includes a right housing, a left housing, and an end cover connected in sequence. The right housing and the left housing together form a gear mounting cavity, and the left housing and the end cover together form a motor mounting cavity. The planetary gear set is located in the gear mounting cavity, and the motor assembly is located in the motor mounting cavity. The oil inlet channel is located in the end cap.

19. A vehicle, characterized in that: The hybrid electric drive assembly included in any one of claims 16-18.

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