Shaft assembly, drive assembly and vehicle

Abstract

The application discloses an axle assembly, a driving assembly and a vehicle, and relates to the technical field of axle assemblies. The axle assembly comprises an axle body, a first oil channel is arranged in the axle body, a plurality of oil outlet holes are arranged on the axle body along the axial direction of the axle body, and the plurality of oil outlet holes are in communication with the first oil channel. A plug is arranged at one end of the first oil channel, an oil inlet hole is arranged on the plug, the oil inlet hole is in communication with the first oil channel, and the included angle between the oil inlet hole and the axis of the axle body is an acute angle. The inclined oil inlet hole can eliminate the influence of the flow distribution of the jet on the axle assembly, and the proximal end and the distal end of the axle body can meet the requirements at different rotating speeds.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drive assembly, in particular to a drive assembly and a vehicle. BACKGROUND

[0002] Oil-cooled motors are increasingly applied to new energy vehicle drive assemblies due to their good cooling effect. In order to improve the maximum vehicle speed, the maximum rotating speed of the motor has been increased to more than 20000 rpm. The cooling and lubricating system of the motor often designs an internal oil channel inside the rotating shaft such as the motor shaft and the input shaft.

[0003] In the related art, under high-speed working conditions, the mechanical pump connected to the wheel end has high rotating speed, large inlet flow and pressure, and the oil jet has a long range. Under the action of centrifugal force, the far-end flow distribution of the oil channel is more than the near-end flow distribution. Conversely, under low-speed working conditions, the mechanical pump has low rotating speed, low inlet flow and pressure, and the oil jet has a short range, which can cause the near-end flow distribution of the oil channel to be more than the far-end flow distribution, thereby causing uneven flow distribution of each oil port of the internal oil channel under high-speed and low-speed working conditions. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a shaft assembly, which can eliminate the influence of jet flow on the flow distribution of the drive assembly by setting an inclined oil inlet hole, so that the near-end and far-end of the shaft body can meet the requirements under different rotating speeds.

[0005] The present application further provides a drive assembly.

[0006] The present application further provides a vehicle.

[0007] According to the shaft assembly of the first aspect of the present application, the shaft body is provided with a first oil channel and a plurality of oil outlet holes spaced along the axial direction of the shaft body, and the plurality of oil outlet holes are in communication with the first oil channel. The plug is connected to the oil inlet end of the first oil channel, and the plug is provided with an oil inlet hole in communication with the first oil channel, and the included angle between the oil inlet hole and the axis of the shaft body is an acute angle.

[0008] According to the shaft assembly of the present application, the influence of jet flow on the flow distribution of the shaft assembly can be eliminated by setting an inclined oil inlet hole, so that the near-end and far-end of the shaft body can meet the requirements under different rotating speeds.

[0009] According to some embodiments of the present application, the included angle between the oil inlet hole and the axial direction of the shaft body is α, and α satisfies the relationship: 5°≤α≤10°.

[0010] According to some embodiments of the present application, further comprising: a sealing member, the plug is provided with a receiving groove, the sealing member is clamped between the plug and the inner wall of the first oil passage and located in the receiving groove.

[0011] According to some embodiments of the present application, further comprising: an oil baffle, the oil baffle is connected with the end of the first oil passage away from the plug.

[0012] According to some embodiments of the present application, in the axial direction of the shaft body, the shaft body has a plurality of oil outlet hole groups, the oil outlet hole groups include a first motor oil outlet hole group and a second motor oil outlet hole group, the oil outlet hole of the first motor oil outlet hole group is a first oil outlet hole, the oil outlet hole of the second motor oil outlet hole group is a second oil outlet hole, the first oil outlet hole is arranged close to the oil inlet end of the first oil passage and the second oil outlet hole is arranged away from the oil inlet end of the first oil passage, the part of the shaft body between the first oil outlet hole and the second oil outlet hole is adapted to arrange a rotor of a motor, the first oil outlet hole and the second oil outlet hole are both adapted to be arranged opposite to a stator of the motor; and the sum of the areas of the first oil outlet holes is less than the sum of the areas of the second oil outlet holes.

[0013] According to some embodiments of the present application, in the axial direction of the shaft body, the shaft body has a plurality of oil outlet hole groups, the plurality of oil outlet hole groups are arranged at intervals along the axial direction of the shaft body, each of the oil outlet hole groups includes at least one oil outlet hole; the oil outlet hole groups include at least one bearing oil outlet hole group and at least one motor oil outlet hole group, the oil outlet holes of the bearing oil outlet hole group are adapted to be arranged opposite to bearings, the oil outlet holes of the motor oil outlet hole group are adapted to be arranged opposite to a motor; and the sum of the areas of the oil outlet holes of each of the motor oil outlet hole groups is greater than the sum of the areas of the oil outlet holes of each of the bearing oil outlet hole groups.

[0014] According to some embodiments of the present application, the shaft body includes: a motor shaft and an input shaft, one end of the input shaft is formed with an oil inlet end of the first oil passage, one end of the motor shaft is sleeved on the other end of the input shaft; the rotor of the motor is adapted to be sleeved on the motor shaft, the oil outlet holes of the motor oil outlet hole group are all arranged on the motor shaft and are adapted to be arranged opposite to the stator of the motor.

[0015] According to some embodiments of the present application, the bearing oil outlet hole group includes a first bearing oil outlet hole group, the oil outlet hole of the first bearing oil outlet hole group is a third oil outlet hole, the third oil outlet hole is arranged on the input shaft; one end of the input shaft close to the motor shaft is adapted to arrange a first bearing, the third oil outlet hole is adapted to be arranged opposite to the first bearing.

[0016] According to some embodiments of the present invention, the bearing oil outlet group includes a second bearing oil outlet group, wherein the oil outlet of the second bearing oil outlet group is a fourth oil outlet, and the fourth oil outlet is disposed on the input shaft; the end of the motor shaft near the input shaft is adapted to be disposed on the second bearing, and the fourth oil outlet is adapted to be disposed opposite to the second bearing.

[0017] According to some embodiments of the present invention, the bearing oil outlet group includes a third bearing oil outlet group, wherein the oil outlet of the third bearing oil outlet group is a fifth oil outlet, and the fifth oil outlet is disposed on the motor shaft; the end of the motor shaft opposite to the input shaft is adapted to be disposed on a fourth bearing, and the fifth oil outlet is adapted to be disposed opposite to the fourth bearing.

[0018] According to a second aspect of the present invention, a drive assembly includes: the shaft assembly, a motor, and a bearing, wherein the shaft body of the shaft assembly is respectively connected to the rotor of the motor and the bearing, at least one oil outlet is disposed opposite to the stator of the motor, and at least one oil outlet is disposed opposite to the bearing.

[0019] A vehicle according to a third aspect of the present invention includes the drive assembly.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a cross-sectional view of the drive assembly according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 Partial schematic diagram A;

[0024] Figure 3 yes Figure 1 Partial schematic diagram B;

[0025] Figure 4 This is a cross-sectional view of the plug and seal according to an embodiment of the present invention.

[0026] Figure label:

[0027] 100. Drive assembly;

[0028] 10. Housing; 11. Second oil passage; 12. Sixth oil outlet;

[0029] 20. Shaft body; 21. First oil passage; 22. Input shaft; 23. Motor shaft; 24. First oil outlet; 25. Second oil outlet; 26. Third oil outlet; 27. Fourth oil outlet; 28. Fifth oil outlet;

[0030] 30. Plug; 31. Oil inlet; 32. Receiving groove; 33. First section; 34. Second section; 35. Step;

[0031] 40. Electric motor; 41. Stator; 42. Rotor;

[0032] 51. Seal; 52. First bearing; 53. Second bearing; 54. Third bearing; 55. Fourth bearing. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0034] The following is for reference. Figures 1-4 Describing a shaft assembly according to an embodiment of the present invention, the present invention also proposes a drive assembly 100 having the above-described shaft assembly, and further proposes a vehicle having the above-described drive assembly 100.

[0035] Combination Figures 1-4 As shown, the shaft assembly of this embodiment includes a shaft body 20 and a plug 30. The shaft body 20 is disposed within the housing 10, and a first oil passage 21 is provided within the shaft body 20. The shaft body 20 also has multiple oil outlet holes spaced apart along its axial direction, all of which communicate with the first oil passage 21. A motor 40 and multiple bearings are mounted on the shaft assembly. When the motor 40 is energized, the rotor 42 rotates relative to the stator 41 under the action of electromagnetic force. Since the rotor 42 and the shaft body 20 rotate coaxially, the motor 40 outputs power. Furthermore, since the coil of the motor 40 heats up when energized, cooling of the coil is necessary. Therefore, the multiple oil outlet holes on the shaft assembly allow oil to be sprayed out, cooling and lubricating the shaft assembly 40 and the bearings.

[0036] One end of the plug 30 is connected to the oil inlet of the first oil passage 21, and the other end of the plug 30 is connected to the housing 10. The plug 30 is provided with an oil inlet hole 31. That is to say, the plug 30 connects the housing 10 and the shaft 20, and one end of the oil inlet hole 31 on the plug 30 is connected to the first oil passage 21, while the other end of the oil inlet hole 31 can be connected to the input oil passage, that is, oil can enter the drive assembly 100 through the plug 30.

[0037] Combination Figure 2 and Figure 4As shown, the angle between the oil inlet 31 and the axial direction of the shaft 20 is an acute angle. Because the mechanical pump has a high rotational speed, large inlet flow rate and pressure, the ejected oil has a long range. Under centrifugal force, this results in a higher flow rate at the far end and a lower flow rate at the near end of the first oil passage 21. By setting an inclined oil inlet 31, the oil adheres tightly to the inner wall of the first oil passage 21 after entering it, thus eliminating the influence of the jet and allowing for a more rational distribution of the oil.

[0038] Therefore, by setting the inclined oil inlet 31, the influence of the jet on the flow distribution of the shaft assembly can be eliminated, so that the near end and far end of the shaft 20 can meet the requirements at different speeds.

[0039] Reference Figure 4 As shown, the angle between the oil inlet 31 and the axial direction of the shaft 20 is α, which satisfies the relationship: 5°≤α≤10°. This setting, by placing the angle between the oil inlet 31 and the axial direction between 5° and 10°, can both eliminate the influence of oil jets and prevent oil from impacting the oil passage. For example, when the angle between the oil inlet 31 and the axial direction is less than 5°, the inclination angle of the oil inlet 31 is small, making it impossible to completely eliminate the influence of jets. Conversely, when the angle between the oil inlet 31 and the axial direction is greater than 10°, the inclination angle of the oil inlet 31 is large, resulting in a larger angle between the oil inlet 31 and the inner wall of the oil passage, making it easier for the oil to impact the oil passage. Furthermore, when the angle between the oil inlet 31 and the axial direction is greater than 10°, the size of the plug 30 in the axial direction is relatively small, resulting in a smaller mating area between the plug 30 and the shaft 20, which can affect the sealing performance between the plug 30 and the shaft 20.

[0040] Among them, reference Figure 4 As shown, the plug 30 is provided with a receiving groove 32. The drive assembly 100 also includes a seal 51, which is sandwiched between the plug 30 and the inner wall of the first oil passage 21 and located within the receiving groove 32. This arrangement, by sandwiching the seal 51 between the plug 30 and the first oil passage 21, improves the sealing performance between the plug 30 and the shaft 20, thereby preventing leakage of the drive assembly 100. Furthermore, by providing the receiving groove 32 on the plug 30 and placing the seal 51 within the receiving groove 32, the sealing performance between the plug 30 and the shaft 20 can be further improved, and misalignment of the seal 51 in the axial direction can be prevented.

[0041] Reference Figure 4As shown, the plug 30 includes a first segment 33 and a second segment 34, which are axially connected. The diameter of the first segment 33 is larger than the diameter of the second segment 34, forming a step 35 between the two segments. A receiving groove 32 is provided on the first segment 33. The second segment 34 and the housing 10 are press-fitted. This configuration, with the plug 30 consisting of an axially connected first segment 33 and a step 35 between them, facilitates the fit between the second segment 34 and the housing 10. Furthermore, the press-fit between the second segment 34 and the housing 10 allows for both connection and sealing.

[0042] The shaft assembly also includes an oil baffle plate, which is connected to the end of the first oil passage 21 furthest from the plug 30. Thus, the oil baffle plate seals the end of the first oil passage 21 furthest from the plug 30, preventing oil leakage from any location other than the multiple oil outlets.

[0043] According to one embodiment of the present invention, the shaft 20 has a plurality of oil outlet hole groups in the axial direction of the shaft 20. The oil outlet hole groups include a first motor oil outlet hole group and a second motor oil outlet hole group. The oil outlet hole of the first motor oil outlet hole group is the first oil outlet hole 24, and the oil outlet hole of the second motor oil outlet hole group is the second oil outlet hole 25. The first oil outlet hole 24 is disposed near the oil inlet end of the first oil passage 21, and the second oil outlet hole 25 is disposed away from the oil inlet end of the first oil passage 21. The portion of the shaft 20 located between the first oil outlet hole 24 and the second oil outlet hole 25 is suitable for disposing of the rotor 42 of the motor 40. The first oil outlet hole 24 and the second oil outlet hole 25 are both suitable for being disposed opposite to the stator 41 of the motor 40. The sum of the areas of the first oil outlet holes 24 is less than the sum of the areas of the second oil outlet holes 25. Since the flow rate of the oil decreases after passing through the first oil outlet 24 and then through the second oil outlet 25, the sum of the areas of the second oil outlet 25 can be set to be larger than the sum of the areas of the first oil outlet 24. This allows for a uniform distribution of cooling flow on both sides of the motor 40, thereby enabling balanced heat dissipation of the motor 40.

[0044] According to another embodiment of the present invention, the shaft 20 has a plurality of oil outlet hole groups along its axial direction. These groups are spaced apart along the axial direction of the shaft 20, and each group includes at least one oil outlet hole. Each oil outlet hole group includes at least one bearing oil outlet hole group and at least one motor oil outlet hole group. The oil outlet holes in the bearing oil outlet hole group are adapted to be positioned opposite to the bearings, and the oil outlet holes in the motor oil outlet hole group are adapted to be positioned opposite to the motor 40. Furthermore, the sum of the areas of the oil outlet holes in each motor oil outlet hole group is greater than the sum of the areas of the oil outlet holes in each bearing oil outlet hole group. Since the amount of cooling oil required by the motor 40 is greater than the amount of lubricating oil required by the bearings, setting the sum of the areas of the oil outlet holes in each motor oil outlet hole group to be greater than the sum of the areas of the oil outlet holes in each bearing oil outlet hole group ensures sufficient cooling of the motor 40.

[0045] Reference Figure 1 As shown, the shaft body 20 includes a motor shaft 23 and an input shaft 22. One end of the input shaft 22 forms an oil inlet end of a first oil passage 21. One end of the motor shaft 23 is sleeved on the other end of the input shaft 22. The rotor 42 of the motor 40 is adapted to be sleeved on the motor shaft 23. The oil outlet holes of the motor oil outlet hole group are all set on the motor shaft 23 and are adapted to be opposite to the stator 41 of the motor 40. That is to say, the shaft body 20 is composed of the motor shaft 23 and the input shaft 22. The first oil outlet hole 24 and the second oil outlet hole 25 are both set on the motor shaft 23, and in the axial direction, the first oil outlet hole 24 and the second oil outlet hole 25 are located on both sides of the rotor 42. This allows the first oil outlet hole 24 and the second oil outlet hole 25 to cool and lubricate both sides of the rotor 42 and the stator 41 respectively, thereby effectively reducing the temperature of the rotor 42 and the stator 41.

[0046] Reference Figure 3 As shown, the bearing oil outlet group includes a first bearing oil outlet group, and the oil outlet of the first bearing oil outlet group is a third oil outlet 26. The third oil outlet 26 is disposed on the input shaft 22. The end of the input shaft 22 near the motor shaft 23 is suitable for mounting the first bearing 52, and the third oil outlet 26 is suitable for being disposed opposite to the first bearing 52. With this arrangement, by providing the third oil outlet 26 on the input shaft 22 that communicates with the first oil passage 21, and by displacing the third oil outlet 26 opposite to the first bearing 52, for example, by placing the end of the third oil outlet 26 away from the first oil passage 21 on the left or right side of the first bearing 52, oil can be sprayed onto the first bearing 52 through the third oil outlet 26, thus achieving both lubrication and cooling of the first bearing 52.

[0047] Reference Figure 3As shown, the bearing oil outlet group includes a second bearing oil outlet group, and the oil outlet of the second bearing oil outlet group is a fourth oil outlet 27. The fourth oil outlet 27 is disposed on the input shaft 22. The end of the motor shaft 23 near the input shaft 22 is suitable for mounting the second bearing 53, and the fourth oil outlet 27 is suitable for being positioned opposite the second bearing 53. With this arrangement, by providing the fourth oil outlet 27 on the input shaft 22 that communicates with the first oil passage 21, and by positioning the fourth oil outlet 27 opposite the second bearing 53, oil can be sprayed onto the second bearing 53 through the fourth oil outlet 27, thus achieving both lubrication and cooling of the second bearing 53.

[0048] Since the second bearing 53 is mounted on the motor shaft 23, in order to avoid affecting the first oil outlet 24 and the second oil outlet 25 by opening the fourth oil outlet 27 on the motor shaft 23, the fourth oil outlet 27 is mounted on the input shaft 22 and is inclined. This allows the fourth oil outlet 27 to be positioned opposite to the second bearing 53, thereby enabling the oil to lubricate and cool the second bearing 53.

[0049] Reference Figure 4 As shown, a third bearing 54 is provided at the end of the input shaft 22 opposite to the motor shaft 23. The third bearing 54 is sandwiched between the housing 10 and the input shaft 22. A second oil passage 11 is provided inside the housing 10. The second oil passage 11 is connected to the oil inlet 31, and a sixth oil outlet 12 is provided on the second oil passage 11. The sixth oil outlet 12 and the third bearing 54 are arranged opposite each other. With this arrangement, by providing the sixth oil outlet 12 on the housing 10 and connecting it to the second oil passage 11, and by arranging the sixth oil outlet 12 and the third bearing 54 opposite each other, oil can be sprayed onto the third bearing 54 through the sixth oil outlet 12, thus achieving oil lubrication and cooling of the third bearing 54.

[0050] The housing 10 has a second oil passage 11, and the oil inlet 31 of the plug 30 is connected between the first oil passage 21 and the second oil passage 11. This allows oil to enter the drive assembly 100 from the second oil passage 11 on the housing 10 and enter the first oil passage 21 through the oil inlet 31, thereby achieving lubrication and heat dissipation of the drive assembly 100 by the oil.

[0051] Furthermore, the sixth oil outlet 12 is disposed on the housing 10, which facilitates the arrangement of the sixth oil outlet 12.

[0052] In addition, the first bearing 52 and the third bearing 54 are respectively set at both ends of the input shaft 22. By setting the first bearing 52 and the third bearing 54, the input shaft 22 can be supported on the one hand, and the rotation of the input shaft 22 can be facilitated on the other hand.

[0053] Furthermore, the bearing oil outlet group includes a third bearing oil outlet group, with the fifth oil outlet 28 being the oil outlet of the third bearing oil outlet group. The fifth oil outlet 28 is disposed on the motor shaft 23, and the end of the motor shaft 23 opposite to the input shaft 22 is suitable for mounting the fourth bearing 55. The fifth oil outlet 28 is suitable for being positioned opposite to the fourth bearing 55. With this arrangement, by providing the fifth oil outlet 28 connected to the first oil passage 21 on the motor shaft 23, and by positioning the fifth oil outlet 28 opposite to the fourth bearing 55, oil can be sprayed onto the fourth bearing 55 through the fifth oil outlet 28, thus achieving both lubrication and cooling of the fourth bearing 55.

[0054] In addition, the second bearing 53 and the fourth bearing 55 are respectively set at both ends of the motor shaft 23. By setting the second bearing 53 and the fourth bearing 55, the motor shaft 23 can be supported on the one hand, and the rotation of the motor shaft 23 can be facilitated on the other hand.

[0055] According to a second aspect of the present invention, a drive assembly includes: a shaft assembly, a motor 40, and a bearing. The shaft body 20 of the shaft assembly is respectively connected to the rotor 42 of the motor 40 and the bearing. At least one oil outlet is disposed opposite to the stator 41 of the motor 40, and at least one oil outlet is disposed opposite to the bearing. That is, the motor 40 includes: a stator 41 and a rotor 42. The stator 41 is fixed to the housing 10, and the rotor 42 is fixed to the shaft body 20. The stator 41 and the rotor 42 are disposed opposite to each other, and the rotor 42 is sandwiched between a first oil outlet 24 and a second oil outlet 25.

[0056] A vehicle according to a second aspect embodiment of the present invention includes a drive assembly 100.

[0057] In the description of this invention, 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," "axial," "radial," and "circumferential" 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 invention 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 invention.

[0058] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0059] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A shaft assembly, characterized in that, include: case; A shaft body is disposed within the housing. A first oil passage is provided within the shaft body, and a plurality of oil outlet holes are provided on the shaft body at intervals along the axial direction of the shaft body. All of the plurality of oil outlet holes are connected to the first oil passage. A plug, one end of which is connected to the oil inlet end of the first oil passage, the plug having an oil inlet hole that communicates with the first oil passage, and the angle between the oil inlet hole and the axis of the shaft being an acute angle; The plug includes a first section and a second section that are connected to each other in the axial direction, and the second section is interference-fitted with the housing.

2. The shaft assembly according to claim 1, characterized in that, The included angle between the oil inlet hole and the axial direction of the shaft is α, and α satisfies the relationship: 5°≤α≤10°.

3. The shaft assembly according to claim 1, characterized in that, Also includes: A sealing element is provided on the plug, and the sealing element is sandwiched between the plug and the inner wall of the first oil passage and located within the receiving groove.

4. The shaft assembly according to claim 1, characterized in that, Also includes: An oil baffle plate is provided, which is connected to the end of the first oil passage furthest from the plug.

5. The shaft assembly according to claim 1, characterized in that, Along the axial direction of the shaft, the shaft has multiple groups of oil outlet holes, including a first motor oil outlet hole group and a second motor oil outlet hole group. The oil outlet holes of the first motor oil outlet hole group are first oil outlet holes, and the oil outlet holes of the second motor oil outlet hole group are second oil outlet holes. The first oil outlet hole is located near the oil inlet end of the first oil passage, and the second oil outlet hole is located away from the oil inlet end of the first oil passage. The portion of the shaft located between the first oil outlet hole and the second oil outlet hole is suitable for mounting the rotor of the motor. Both the first oil outlet hole and the second oil outlet hole are suitable for being positioned opposite the stator of the motor. The sum of the areas of the first oil outlet holes is less than the sum of the areas of the second oil outlet holes.

6. The shaft assembly according to claim 1, characterized in that, Along the axial direction of the shaft, the shaft has a plurality of oil outlet hole groups, which are spaced apart along the axial direction of the shaft. Each oil outlet hole group includes at least one oil outlet hole. The oil outlet hole group includes at least one bearing oil outlet hole group and at least one motor oil outlet hole group. The oil outlet holes of the bearing oil outlet hole group are adapted to be arranged opposite to the bearing, and the oil outlet holes of the motor oil outlet hole group are adapted to be arranged opposite to the motor. Furthermore, the sum of the areas of the oil outlet holes in each of the motor oil outlet hole groups is greater than the sum of the areas of the oil outlet holes in each of the bearing oil outlet hole groups.

7. The shaft assembly according to claim 6, characterized in that, The shaft includes a motor shaft and an input shaft. One end of the input shaft forms an oil inlet end of the first oil passage, and one end of the motor shaft is sleeved on the other end of the input shaft. The rotor of the motor is adapted to be sleeved on the motor shaft, and the oil outlet holes of the motor oil outlet hole group are all arranged on the motor shaft and adapted to be arranged opposite to the stator of the motor.

8. The shaft assembly according to claim 7, characterized in that, The bearing oil outlet group includes a first bearing oil outlet group, wherein the oil outlet of the first bearing oil outlet group is a third oil outlet, and the third oil outlet is disposed on the input shaft; the end of the input shaft near the motor shaft is adapted to be disposed on the first bearing, and the third oil outlet is adapted to be disposed opposite to the first bearing.

9. The shaft assembly according to claim 7, characterized in that, The bearing oil outlet group includes a second bearing oil outlet group, and the oil outlet of the second bearing oil outlet group is a fourth oil outlet, which is disposed on the input shaft; the end of the motor shaft near the input shaft is adapted to be disposed on the second bearing, and the fourth oil outlet is adapted to be disposed opposite to the second bearing.

10. The shaft assembly according to claim 7, characterized in that, The bearing oil outlet group includes a third bearing oil outlet group, and the oil outlet of the third bearing oil outlet group is a fifth oil outlet, which is disposed on the motor shaft; the end of the motor shaft opposite to the input shaft is adapted to be disposed on a fourth bearing, and the fifth oil outlet is adapted to be disposed opposite to the fourth bearing.

11. A drive assembly, characterized in that, include: The shaft assembly, motor, and bearing according to any one of claims 1-10, wherein the shaft body of the shaft assembly is respectively connected to the rotor of the motor and the bearing, at least one of the oil outlet holes is disposed opposite to the stator of the motor, and at least one of the oil outlet holes is disposed opposite to the bearing.

12. A vehicle, characterized in that, include: The drive assembly as claimed in claim 11.

Images