Speed reducer, power assembly and vehicle

Abstract

The utility model discloses a speed reducer, a power assembly and a vehicle. The speed reducer comprises a box body, a shell and a part to be lubricated. A first cavity is formed in the box body, and a through hole communicating with the interior of the first cavity is formed in the outer side of the box body. The shell is installed on the outer side of the box body, a second cavity is formed in the shell, the first cavity is communicated with the second cavity through the through hole, and the part to be lubricated is arranged in the second cavity. An opening is formed in the inner wall of the through hole and is suitable for being communicated with an oil pump. According to the speed reducer, the first cavity and the second cavity are communicated through the through hole, the through hole is provided with an opening communicated with the oil pump, and lubricating oil in the oil pump can flow to the first cavity and the second cavity through the opening so as to lubricate the box body and the part to be lubricated.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a reducer, a power assembly and a vehicle. Background Art

[0002] In the related technology, a decoupling mechanism, a closed transmission half shaft and other accessory structures may be installed on the outside of the reducer. These accessory structures have friction, but the lubricating oil splashed from the inside of the reducer is difficult to splash into these accessory structures. Therefore, these accessory structures are often difficult to lubricate. Utility Model Content

[0003] The embodiments of the present utility model provide a reducer, a power assembly and a vehicle to solve at least one of the above-mentioned technical problems.

[0004] A reducer according to an embodiment of the utility model comprises a box body, a shell and parts to be lubricated.

[0005] A first chamber is provided in the box body, and a through hole connected to the first chamber is opened on the outer side of the box body;

[0006] The shell is installed outside the box body, a second chamber is arranged in the shell, the first chamber and the second chamber are communicated through the through hole, and the part to be lubricated is arranged in the second chamber.

[0007] An opening is formed on the inner wall of the through hole, and the opening is suitable for being connected to an oil pump.

[0008] In the above-mentioned reducer, the first chamber and the second chamber are connected through a through hole, and the through hole has an opening connected to the oil pump. The lubricating oil in the oil pump can flow to the first chamber and the second chamber through the opening, thereby lubricating the box and the parts to be lubricated respectively.

[0009] In certain embodiments, an oil supply passage is provided on the casing, an inlet of the oil supply passage is adapted to be connected to an oil pump, and an outlet of the oil supply passage is connected to the opening.

[0010] In some embodiments, the reducer includes an oil baffle plate, which is arranged in the through hole. The oil baffle plate is provided with a half-shaft hole for the half-shaft to pass through, and the opening is arranged on a side of the oil baffle plate close to the second chamber.

[0011] In certain embodiments, an oil-passing hole is formed on the oil baffle plate, and the oil-passing hole is arranged between the hole wall of the semi-axial hole and the outer edge of the oil baffle plate.

[0012] In some embodiments, the oil baffle plate is provided with a plurality of the oil holes, and the plurality of the oil holes are arranged at intervals along the circumference of the oil baffle plate.

[0013] In some embodiments, the housing includes a transmission assembly, the oil baffle is located between the transmission assembly and the second chamber, the transmission assembly includes a differential housing and a support bearing, the support bearing is sleeved on the outside of the differential housing and supported on the inner wall of the through hole;

[0014] The part to be lubricated includes a connecting shaft, the differential housing is provided with a mounting hole, the connecting shaft passes through the half-shaft hole and the mounting hole and is connected to the differential housing.

[0015] In some embodiments, an oil guide groove extending axially along the mounting hole is provided on the hole wall of the mounting hole.

[0016] In some embodiments, the oil guide groove extends in a spiral shape around the central axis of the mounting hole.

[0017] A power assembly according to an embodiment of the utility model includes a reducer according to any one of the above embodiments.

[0018] A vehicle according to an embodiment of the present utility model comprises the powertrain described in the above embodiment.

[0019] In the above-mentioned power assembly and vehicle, the first chamber and the second chamber are connected by a through hole, and the through hole has an opening connected to the oil pump. The lubricating oil in the oil pump can flow to the first chamber and the second chamber through the opening, thereby lubricating the box and the parts to be lubricated respectively.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1 It is a schematic structural diagram of a reducer according to an embodiment of the utility model;

[0023] Figure 2 It is a cross-sectional schematic diagram of a reducer according to an embodiment of the utility model;

[0024] Figure 3 yes Figure 2 The enlarged schematic diagram of part III;

[0025] Figure 4 is another cross-sectional schematic diagram of a reducer according to an embodiment of the utility model;

[0026] Figure 5 yes Figure 4The enlarged schematic diagram of part V;

[0027] Figure 6 It is a partial structural schematic diagram of a reducer according to an embodiment of the utility model;

[0028] Figure 7 It is another partial structural schematic diagram of the reducer according to the embodiment of the utility model;

[0029] Figure 8 It is another partial cross-sectional schematic diagram of the reducer according to the embodiment of the utility model.

[0030] Description of main component symbols:

[0031] Reducer-100, housing-10, shell-12, parts to be lubricated-13, transmission assembly-14, decoupling mechanism-16, closed transmission half shaft-17, oil baffle plate-18, oil supply passage-20, opening-21, through hole-22, oil hole-24, first chamber-25, second chamber-26, differential housing-28, support bearing-30, connecting shaft-32, mounting hole-34, half shaft hole-36, oil guide groove-38. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] The disclosure herein provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described herein. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0037] See also Figures 1 to 3 A reducer 100 provided in an embodiment of the utility model includes a housing 10 , a shell 12 and a part to be lubricated 13 .

[0038] The box body 10 is provided with a first chamber 25, and a through hole 22 connected to the first chamber 25 is provided on the outer side of the box body 10. The housing 12 is mounted on the outer side of the box body 10, and a second chamber 26 is provided in the housing 12. The first chamber 25 and the second chamber 26 are connected through the through hole 22, and the lubricated part 13 is arranged in the second chamber 26. An opening 21 is provided on the inner wall of the through hole 22, and the opening 21 is suitable for connecting to the oil pump.

[0039] In the above-mentioned reducer 100, the first chamber 25 and the second chamber 26 are connected through a through hole 22, and the through hole 22 has an opening 21 connected to the oil pump. The lubricating oil in the oil pump can flow to the first chamber 25 and the second chamber 26 through the opening 21, thereby lubricating the housing 10 and the part to be lubricated 13 respectively.

[0040] Specifically, the reducer 100 is generally used to convert the power of an electric motor, an internal combustion engine or other high-speed operation into a low-speed and high-torque power, and plays a role in matching the speed and transmitting the torque between the prime mover and the working machine or the execution structure. The reducer 100 usually has a plurality of transmission gears, and the reducer 100 needs to lubricate the gear shaft bearings of the plurality of gears in time when working to ensure the normal operation of the gear shaft.

[0041] In the related art, a decoupling mechanism 16, a closed transmission half shaft 17 and other accessory structures may be installed on the outside of the reducer 100. These accessory structures have friction, but the lubricating oil splashed from the inside of the reducer 100 is difficult to splash into these accessory structures. Therefore, these accessory structures are often difficult to lubricate.

[0042] Based on the above problems, a reducer 100 provided in an embodiment of the utility model has a first chamber 25 provided in a casing 10, a through hole 22 connected to the first chamber 25 is opened on the outside of the casing 10, and a shell 12 is installed on the outside of the casing 10, and a second chamber 26 of the shell 12 is connected to the first chamber 25 through the through hole 22.

[0043] An opening 21 is provided on the inner wall of the through hole 22, and the opening 21 is connected to the oil pump, so that the lubricating oil can enter the first chamber 25 and the second chamber 26 from the opening 21. Further, part of the lubricating oil enters the interior of the box body 10 through the first chamber 25 to lubricate the various components inside the box body 10, and part of the lubricating oil enters the lubricated part 13 disposed in the second chamber 26 through the second chamber 26, thereby respectively achieving lubrication of the box body 10 and the lubricated part 13.

[0044] like Figure 2 or Figure 8 As shown, the part to be lubricated 13 on the reducer 100 can be a decoupling mechanism 16 or a closed transmission half shaft 17 .

[0045] Preferably, the part to be lubricated 13 is a decoupling mechanism 16 .

[0046] It should be noted that coupling refers to the phenomenon that two or more systems or two forms of motion influence each other and even combine through interaction. The decoupling state is decoupling. It can be understood that the powertrain is used to provide power for the vehicle. The powertrain is connected to the whole vehicle through the drive shaft, the decoupling mechanism 16 and the output shaft and transmits power. The powertrain is a power output mechanism, and the whole vehicle is a running mechanism. The power connection between the powertrain and the whole vehicle is a coupling relationship. The decoupling mechanism 16 is used to decouple or close the power connection between the powertrain and the whole vehicle. When a dual-drive vehicle adopts low-torque drive, the powertrain that does not participate in the drive will idle as the vehicle travels. At this time, the decoupling mechanism 16 can decouple the drive shaft and the output shaft in time, that is, the decoupling mechanism 16 can disconnect the transmission between the powertrain and the whole vehicle in time, thereby effectively reducing the energy consumption of the whole vehicle.

[0047] In some embodiments, an oil supply passage 20 is disposed on the casing 10 , an inlet of the oil supply passage 20 is adapted to be connected to an oil pump, and an outlet of the oil supply passage 20 is connected to an opening 21 .

[0048] In this way, the lubricating oil provided by the oil pump is guided to the opening 21 .

[0049] Specifically, one end of the oil supply passage 20 is connected to the oil pump, and the other end is connected to the opening 21. The oil pump pumps lubricating oil into the oil supply passage 20, and the lubricating oil flows from the oil supply passage 20 to the opening 21. Part of the lubricating oil enters the interior of the housing 10 through the first chamber 25 to lubricate the various components inside the housing 10, and part of the lubricating oil enters the lubricated parts 13 disposed in the second chamber 26 through the second chamber 26, thereby respectively achieving lubrication of the housing 10 and the lubricated parts 13.

[0050] In some embodiments, the reducer 100 includes an oil baffle plate 18 , which is disposed in the through hole 22 . The oil baffle plate 18 is provided with a half-shaft hole 36 for the half-shaft to pass through. The opening 21 is disposed on a side of the oil baffle plate 18 close to the second chamber 26 .

[0051] In this way, sufficient lubrication of the parts to be lubricated 13 can be achieved.

[0052] Specifically, a semi-axial hole 36 is provided on the oil baffle plate 18, and the lubricated part 13 is inserted into the semi-axial hole 36 through the connecting shaft 32 and installed in the second chamber 26. The oil baffle plate 18 is provided at the through hole 22, and the opening 21 is provided on the side of the oil baffle plate 18 close to the second chamber 26. After the lubricating oil flows out from the opening 21, it flows to the second chamber 26 along the connecting shaft 32 of the lubricated part 13 under the guidance of the oil baffle plate 18, thereby achieving lubrication of the lubricated part 13 and ensuring a good lubrication effect. When the lubricating oil in the second chamber 26 reaches a certain liquid level height and meets the lubrication requirements of the lubricated part 13, the lubricating oil can flow to the first chamber 25 through the semi-axial hole 36.

[0053] In some embodiments, an oil through hole 24 is formed on the oil baffle plate 18 . The oil through hole 24 is disposed between the hole wall of the half-shaft hole 36 and the outer edge of the oil baffle plate 18 .

[0054] In this way, the flow distribution of the lubricating oil between the first chamber 25 and the second chamber 26 is achieved by providing the oil baffle plate 18 .

[0055] Specifically, Figure 3 As shown, one end of the oil supply passage 20 is connected to the oil pump, and the other end is connected to the opening 21. The opening 21 is provided on the side of the oil baffle plate 18 close to the second chamber 26. The oil pump pumps lubricating oil into the oil supply passage 20, and the lubricating oil flows from the oil supply passage 20 to the oil baffle plate 18. Most of the lubricating oil flows to the lubricated parts 13 through the second oil passage to lubricate the lubricated parts 13. In addition, a small amount of lubricating oil enters the housing 10 through the oil hole 24 on the oil baffle plate 18 to lubricate other parts in the housing 10 to avoid insufficient lubrication.

[0056] In some embodiments, the oil baffle plate 18 is provided with a plurality of oil holes 24 , and the plurality of oil holes 24 are arranged at intervals along the circumference of the oil baffle plate 18 .

[0057] In this way, the flow ratio of the lubricating oil flowing to the first chamber 25 and the second chamber 26 can be controlled according to the number of the oil holes 24 on the oil baffle plate 18 .

[0058] Specifically, increasing the number of oil holes 24 can increase the proportion of lubricating oil entering the first chamber 25. In this way, the number of oil holes 24 can be increased or decreased according to the required amount of lubricating oil in the first chamber 25 and the second chamber 26.

[0059] Further, the plurality of oil holes 24 may be evenly distributed along the circumference of the oil baffle plate 18 . Alternatively, the plurality of oil holes 24 may be unevenly distributed along the circumference of the oil baffle plate 18 .

[0060] In some embodiments, the housing 10 includes a transmission assembly 14, the oil baffle 18 is located between the transmission assembly 14 and the second chamber 26, the transmission assembly 14 includes a differential housing 28 and a support bearing 30, the support bearing 30 is sleeved on the outside of the differential housing 28 and supported on the inner wall of the through hole 22; the lubricated part 13 includes a connecting shaft 32, the differential housing 28 is provided with a mounting hole 34, the connecting shaft 32 passes through a half-shaft hole 36 and a mounting hole 34 and is connected to the differential housing 28.

[0061] In this way, the transmission assembly 14 and the parts to be lubricated 13 can be lubricated separately.

[0062] Specifically, the transmission assembly 14 includes a differential and a differential lock. The differential can enable the left and right (or front and rear) driving wheels to rotate at different speeds, so that the tires on the left and right sides of the vehicle produce different speeds to achieve vehicle steering. The differential lock is used to lock the differential to keep the power output of the left and right wheels of the vehicle consistent.

[0063] The transmission assembly 14 and the decoupling mechanism 16 are connected to each other and installed on the housing 10 of the reducer 100. For the lubrication of the reducer 100, an oil pump is used to supply lubricating oil with sufficient pressure and flow to force lubricate the components in the reduction box. However, this lubrication method can only ensure the lubrication of the components in the housing 10, especially the bearings. At the connection between the transmission assembly 14 and the decoupling mechanism 16, most of the lubricating oil flows to the support bearing 30, resulting in the original lubricating oil circuit being unable to take into account the lubrication of the decoupling mechanism 16, which may cause insufficient lubrication of the decoupling mechanism 16.

[0064] An oil baffle plate 18 is provided at the connection between the transmission assembly 14 and the decoupling mechanism 16, and the oil baffle plate 18 can redistribute the lubricating oil flowing to the transmission assembly 14 and the decoupling mechanism 16, so that part of the lubricating oil flows to the transmission assembly 14 and part of the lubricating oil flows to the decoupling mechanism 16. Thus, the decoupling mechanism 16 can be fully lubricated.

[0065] See also Figure 6 and Figure 7 In some embodiments, an oil guide groove 38 extending axially along the mounting hole 34 is opened on the hole wall of the mounting hole 34 .

[0066] In this way, the lubricating oil can enter the transmission assembly 14 better, thereby improving the lubrication effect.

[0067] Specifically, the lubricating oil flowing into the transmission assembly 14 is divided into two parts, one part lubricates the support bearing 30, and the other part enters the gap between the mounting hole 34 and the connecting shaft 32 to lubricate the friction parts that may exist between the differential housing 28 and the connecting shaft 32. Among them, the differential housing 28 is provided with a mounting hole 34 for connecting with the connecting shaft 32 of the decoupling mechanism 16. The gap between the mounting hole 34 and the connecting shaft 32 is small, and the space for the lubricating oil to flow is small. Therefore, the hole wall of the mounting hole 34 is provided with an oil guide groove 38 extending axially from the through hole 22, which can increase the space for the lubricating oil to flow, better guide the lubricating oil to the gap between the mounting hole 34 and the connecting shaft 32, and improve the lubrication effect between the mounting hole 34 and the connecting shaft 32.

[0068] See also Figure 7 In some embodiments, the oil guide groove 38 extends in a spiral shape around the central axis of the mounting hole 34 .

[0069] In this way, the oil guiding and lubricating effect of the oil guiding groove 38 can be improved.

[0070] Specifically, the connecting shaft 32 of the decoupling mechanism 16 can rotate in the through hole 22 of the differential housing 28. When the connecting shaft 32 rotates, the oil guide groove 38 spirally extending around the central axis of the through hole 22 can better achieve the effect of oil guide lubrication and guide the lubricating oil to other positions of the transmission assembly 14.

[0071] In summary, the inner wall of the through hole 22 is provided with an opening 21, and the opening 21 is connected to the oil pump, so that the lubricating oil can enter the first chamber 25 and the second chamber 26 from the opening 21. Further, part of the lubricating oil enters the interior of the box body 10 through the first chamber 25 to lubricate the various components inside the box body 10, and part of the lubricating oil enters the lubricated part 13 disposed in the second chamber 26 through the second chamber 26, thereby respectively achieving lubrication of the box body 10 and the lubricated part 13.

[0072] like Figures 1 to 5 As shown, the lubricated part 13 is assembled on the housing 10 and connected to the transmission assembly 14 through the connecting shaft 32. The housing 10 has an oil supply circuit 20. During operation, the oil pump pumps the lubricating oil into the oil supply circuit 20, and the lubricating oil enters the through hole 22 through the oil supply circuit 20. The oil baffle plate 18 diverts the lubricating oil, and most of the lubricating oil enters the lubricated part 13 along the connecting shaft 32, so as to complete the lubrication of the lubricated part 13. Among them. The lubrication of the lubricated part 13 mainly lubricates the bearing of the lubricated part 13. The oil baffle plate 18 is provided with an oil hole 24, so that a small amount of lubricating oil can enter the transmission assembly 14 through the oil hole 24 on the oil baffle plate 18 to lubricate the transmission assembly 14. At the same time, an oil guide groove 38 is provided on the hole wall of the through hole 22 connected to the connecting shaft 32 on the differential housing 12 of the transmission assembly 14, and the oil guide groove 38 extends spirally around the central axis of the through hole 22. When the connecting shaft 32 rotates, the lubricating oil can be better introduced into the transmission assembly 14 along the spiral oil guide groove 38. The lubrication of the transmission assembly 14 mainly lubricates the half-axle gears and gaskets of the transmission assembly 14.

[0073] For the housing 10 of the reducer 100, the lubricated parts 13 are fully lubricated through active lubrication to prevent the problem of insufficient lubrication of the lubricated parts 13 in a long-term connection state. At the same time, through the diversion of the oil baffle 18, a part of the lubricating oil can enter the transmission component 14 to lubricate the transmission component 14 to avoid insufficient lubrication of the transmission component 14.

[0074] A power assembly according to an embodiment of the present invention includes the reducer 100 according to any one of the above embodiments.

[0075] A vehicle according to an embodiment of the present utility model comprises the powertrain according to the above embodiment.

[0076] In the above-mentioned power assembly and vehicle, the first chamber 25 and the second chamber 26 are connected through the through hole 22, and the through hole 22 has an opening 21 connected to the oil pump. The lubricating oil in the oil pump can flow to the first chamber 25 and the second chamber 26 through the opening 21, thereby lubricating the box body 10 and the part to be lubricated 13 respectively.

[0077] Specifically, vehicles include but are not limited to pure electric vehicles, hybrid vehicles, extended-range electric vehicles, and the like.

[0078] It should be noted that the above explanations of the implementation and beneficial effects of the reducer 100 are also applicable to the powertrain and vehicle of the implementation of the utility model, and will not be elaborated here in detail to avoid redundancy.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above implementation methods within the scope of the present invention.

Claims

1. A reducer, characterized in that: It includes a box body, a shell and parts to be lubricated; A first chamber is provided in the box body, and a through hole connected to the first chamber is opened on the outer side of the box body; The shell is installed outside the box body, a second chamber is provided in the shell, the first chamber and the second chamber are connected through the through hole, and the lubricated part is provided in the second chamber; An opening is formed on the inner wall of the through hole, and the opening is suitable for being connected to an oil pump.

2. The reducer according to claim 1, characterized in that: An oil supply passage is provided on the box body, the inlet of the oil supply passage is suitable for being connected to an oil pump, and the outlet of the oil supply passage is connected to the opening.

3. The reducer according to claim 1, characterized in that: The reducer comprises an oil baffle plate, which is arranged in the through hole. A half-axle hole for the half-axle to pass through is formed on the oil baffle plate, and the opening is arranged on a side of the oil baffle plate close to the second chamber.

4. The reducer according to claim 3, characterized in that: The oil baffle plate is provided with an oil hole, and the oil hole is arranged between the hole wall of the semi-axial hole and the outer edge of the oil baffle plate.

5. The reducer according to claim 4, characterized in that: The oil baffle plate is provided with a plurality of the oil holes, and the plurality of the oil holes are arranged at intervals along the circumference of the oil baffle plate.

6. The reducer according to claim 3, characterized in that: The housing includes a transmission assembly, the oil baffle is located between the transmission assembly and the second chamber, the transmission assembly includes a differential housing and a support bearing, the support bearing is sleeved on the outside of the differential housing and supported on the inner wall of the through hole; The part to be lubricated includes a connecting shaft, the differential housing is provided with a mounting hole, the connecting shaft passes through the half-shaft hole and the mounting hole and is connected to the differential housing.

7. The reducer according to claim 6, characterized in that: An oil guide groove extending axially along the mounting hole is provided on the hole wall of the mounting hole.

8. The reducer according to claim 7, characterized in that: The oil guide groove extends in a spiral shape around the central axis of the mounting hole.

9. A powertrain, characterized in that: A reducer comprising the reducer described in any one of claims 1 to 8.

10. A vehicle, characterized in that: Includes the powertrain as described in claim 9.

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