Speed reducer assembly for vehicle and vehicle with speed reducer assembly

Abstract

The invention discloses a speed reducer assembly for a vehicle and the vehicle with the speed reducer assembly. The speed reducer assembly comprises a main shell; an accommodating cavity is formed in the main shell, and the accommodating cavity is provided with a first wall surface and a second wall surface which are spaced from each other; the first wall surface is provided with a containing cavity, the transmission gears are configured to be a plurality of mutually meshed transmission gears and are contained in the containing cavity, and the oil spraying nozzle is arranged on the first wall surface and is suitable for spraying oil towards the transmission gears; the oil blocking shell is contained in the containing cavity, and the oil blocking shell is arranged on at least part of the periphery of the transmission gear and located between the second wall face and the transmission gear. According to the designed speed reducer assembly, the oil blocking shell is arranged on at least part of the periphery of the transmission gear and located between the second wall face and the transmission gear, the transmission gear is prevented from making contact with the lubricating liquid at the bottom of the containing cavity, and therefore the situation that the lubricating liquid causes resistance to meshing teeth of the rotating transmission gear is avoided.

Description

Technical Field

[0001] The present invention relates to the field of reducers, and in particular to a reducer assembly for a vehicle and a vehicle having the same. Background Art

[0002] In the related art, an oil spray nozzle and a plurality of gears meshing with each other are arranged in the reducer housing. The oil spray nozzle is suitable for spraying the lubricating fluid in the reducer housing to the meshing point of the gears to lubricate the gears, thereby reducing the friction during the meshing of the gears, and further reducing the meshing resistance of the gears and extending the service life of the gears. However, the lubricating fluid in the reducer housing will contact the rotating gears and generate resistance to the gears, causing efficiency loss of the reducer and reducing the output torque of the reducer. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a reducer assembly for a vehicle. According to the reducer assembly designed by the present invention, by arranging the oil retaining shell on at least part of the outer periphery of the transmission gear and between the second wall surface and the transmission gear, the transmission gear is prevented from contacting the lubricating liquid at the bottom of the accommodating cavity, thereby preventing the lubricating liquid from causing resistance to the meshing teeth of the rotating transmission gear.

[0004] The present invention also provides a vehicle having the above reducer assembly.

[0005] The reducer assembly according to the present invention includes: a main housing; a accommodating chamber formed in the main housing, the accommodating chamber having a first wall surface and a second wall surface spaced apart from each other; a transmission gear, the transmission gear being constructed as a plurality of gears meshing with each other and accommodated in the accommodating chamber, and an oil spray nozzle, the oil spray nozzle being arranged on the first wall surface and being suitable for spraying oil toward the transmission gear; an oil baffle shell, the oil baffle shell being accommodated in the accommodating chamber, the oil baffle shell being arranged on at least a portion of the periphery of the transmission gear and being located between the second wall surface and the transmission gear.

[0006] According to the reducer assembly of the present invention, an oil retaining shell is arranged in the accommodating chamber. The oil retaining shell is arranged on at least a portion of the outer periphery of the transmission gear and is located between the second wall surface and the transmission gear, thereby avoiding contact between the transmission gear and the lubricating liquid at the bottom of the accommodating chamber, thereby avoiding the lubricating liquid from causing resistance to the meshing teeth of the rotating transmission gear, thereby reducing the efficiency loss of the reducer assembly and increasing the output torque of the reducer assembly.

[0007] According to some embodiments of the present invention, an oil discharge port penetrating in a radial direction is formed on the oil retaining shell.

[0008] According to some embodiments of the present invention, an oil overflow port is formed on the oil retaining shell, and the oil overflow port is located on a side of the oil unloading port close to the second wall surface.

[0009] According to some embodiments of the present invention, the transmission gear includes: a first gear, a second gear and a third gear, the first gear and the second gear are meshed, and the second gear and the third gear are coaxially arranged; the oil baffle housing includes: a first shell, a second shell and a third shell, the first shell, the second shell and the third shell are connected to each other and are respectively arranged on at least a portion of the outer periphery of the first gear, at least a portion of the outer periphery of the second gear and at least a portion of the outer periphery of the third gear.

[0010] According to some embodiments of the present invention, the oil unloading port and the oil overflow port are formed in the first shell.

[0011] According to some embodiments of the present invention, the oil unloading port extends in the circumferential direction of the first gear, and the oil overflow port is constructed as an oil overflow hole penetrating in the radial direction of the first gear; wherein the cross-sectional area of ​​the oil unloading port is larger than the cross-sectional area of ​​the oil overflow hole.

[0012] According to some embodiments of the present invention, a line connecting the oil overflow hole and the center of the first gear is orthogonal to the second wall surface.

[0013] According to some embodiments of the present invention, an oil outlet is formed on the third housing, and the oil outlet is suitable for discharging the lubricating liquid in the third housing.

[0014] According to some embodiments of the present invention, the first shell and / or the third shell is formed with a first fixing portion extending in the axial direction, and the inner wall of the main shell is formed with a second fixing portion suitable for cooperating with the first fixing portion, and the first fixing portion cooperates with the second fixing portion to fix the oil retaining shell in the accommodating cavity.

[0015] According to some embodiments of the present invention, the second shell is formed with a connecting leg extending in a radial direction, and a free end of the connecting leg is connected to the main shell.

[0016] According to some embodiments of the present invention, the main housing includes: a first shell, in which the accommodating cavity is formed, and the accommodating cavity is open along the axial direction of the transmission gear; a second shell, which is arranged at the open end of the first shell and closes the accommodating cavity, and the oil baffle shell is fixedly connected to the first shell and the second shell respectively.

[0017] A vehicle according to another embodiment of the present invention will be briefly described below.

[0018] The vehicle according to the present invention comprises the reducer assembly described in any one of the above embodiments. Since the vehicle according to the present invention is provided with the reducer assembly of the above embodiments, the efficiency loss of the reducer assembly of the vehicle is small, so that the power of the vehicle is good.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 is an exploded view of a reducer assembly according to an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of a reducer assembly according to an embodiment of the present invention;

[0023] Figure 3 is a schematic structural diagram of an oil retaining housing according to an embodiment of the present invention;

[0024] Figure 4 4 is a bottom view of the oil retaining housing according to an embodiment of the present invention.

[0025] Reference numerals: 1. reducer assembly;

[0026] 11. a first shell; 12. a second shell;

[0027] 21. First gear; 22. Third gear;

[0028] 30. Oil retaining shell; 31. First shell; 311. Oil discharge port; 312. Oil overflow port; 32. Second shell; 321. Connecting leg; 33. Third shell; 331. Oil outlet; 34. First fixing part. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which 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.

[0030] In the description of the present invention, 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection 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 invention can be understood according to specific circumstances.

[0033] In the present invention, 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.

[0034] In the related art, an oil spray nozzle and a plurality of gears meshing with each other are arranged in the reducer housing. The oil spray nozzle is suitable for spraying the lubricating fluid in the reducer housing to the meshing point of the gears to lubricate the gears, thereby reducing the friction during the meshing of the gears, and further reducing the meshing resistance of the gears and extending the service life of the gears. However, the lubricating fluid in the reducer housing will contact the rotating gears and generate resistance to the gears, causing efficiency loss of the reducer and reducing the output torque of the reducer.

[0035] Reference below Figure 1-Figure 4 A speed reducer assembly 1 for a vehicle according to an embodiment of the present invention is described.

[0036] like Figure 1-Figure 4 As shown, the reducer assembly 1 according to the present invention includes: a main housing, a transmission gear, an oil spray nozzle and an oil retaining shell 30; a accommodating chamber is formed in the main housing, the accommodating chamber has a first wall surface and a second wall surface spaced from each other, the transmission gear is constructed as a plurality of gears meshing with each other and accommodated in the accommodating chamber, the oil spray nozzle is arranged on the first wall surface and is suitable for spraying oil toward the transmission gear, the oil retaining shell 30 is accommodated in the accommodating chamber, and the oil retaining shell 30 is arranged on at least a portion of the periphery of the transmission gear and is located between the second wall surface and the transmission gear.

[0037] In some embodiments, the accommodating chamber of the main housing has a first wall and a second wall spaced apart from each other in the height direction, the first wall is located above the second wall, an oil spray nozzle is provided on the first wall, a lubricating liquid is stored at the bottom of the accommodating chamber, the oil spray nozzle is suitable for sucking the lubricating liquid at the bottom of the accommodating chamber and spraying the lubricating liquid to the transmission gear and the meshing part of the transmission gear, and the lubricating liquid is suitable for lubricating the meshing transmission gear to reduce the friction when the transmission gear is meshed, thereby reducing the friction loss when the transmission gear is meshed. It can be understood that the lubricating liquid is stored at the bottom of the accommodating chamber, and when the transmission gear rotates, the meshing teeth of the transmission gear contact the liquid surface of the lubricating liquid and move in the lubricating liquid, and the lubricating liquid will generate resistance to the tooth portion of the transmission gear, thereby, the oil retaining shell 30 located between the transmission gear and the second wall can prevent the transmission gear from contacting the lubricating liquid at the bottom of the accommodating chamber, thereby reducing the resistance encountered by the transmission gear when it rotates.

[0038] According to the reducer assembly 1 involved in the present invention, an oil retaining shell 30 is arranged in the accommodating chamber. The oil retaining shell 30 is arranged on at least a portion of the outer periphery of the transmission gear and is located between the second wall surface and the transmission gear, thereby avoiding the transmission gear from contacting the lubricating liquid at the bottom of the accommodating chamber, thereby avoiding the lubricating liquid from causing resistance to the meshing teeth of the rotating transmission gear, thereby reducing the efficiency loss of the reducer assembly 1 and increasing the output torque of the reducer assembly 1.

[0039] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, an oil discharge port 311 penetrating in the radial direction is formed on the oil retaining housing 30 .

[0040] In some embodiments, when the oil nozzle arranged on the first wall surface sprays lubricating liquid toward the transmission gear, part of the lubricating liquid will enter the oil retaining shell 30, and the lubricating liquid in the oil retaining shell 30 will cause resistance to the meshing teeth of the rotating transmission gear. Therefore, an oil discharge port 311 is formed on the oil retaining shell 30 and penetrates in the radial direction to discharge the lubricating liquid in the oil retaining shell 30 out of the oil retaining shell 30, thereby reducing the resistance of the lubricating liquid in the oil retaining shell 30 to the transmission gear and reducing the efficiency loss of the reducer assembly 1.

[0041] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, an oil overflow port 312 is formed on the oil retaining shell 30, and the oil overflow port 312 is located on the side of the oil discharge port 311 close to the second wall. It can be understood that the oil retaining shell 30 is formed with the oil discharge port 311 and the oil overflow port 312, the oil overflow port 312 is arranged on the side of the oil retaining shell 30 close to the second wall, the oil discharge port 311 is arranged on the side of the oil retaining shell 30 away from the second wall, and the direction from the oil overflow port 312 to the oil discharge port 311 is constructed as the rotation direction of the transmission gear, thereby, after the lubricating liquid enters the oil retaining shell 30 through the oil spray nozzle, the lubricating liquid can be discharged through the oil overflow port 312 under the action of gravity, and the meshing teeth of the rotating transmission gear can push the lubricating liquid to move toward the oil discharge port 311 and be discharged from the oil discharge port 311, reducing the storage amount of the lubricating liquid in the oil retaining shell 30, thereby reducing the contact area between the lubricating liquid and the transmission gear, and further reducing the resistance caused by the lubricating liquid to the transmission gear.

[0042] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, the transmission gear includes: a first gear 21, a second gear and a third gear 22, the first gear 21 and the second gear are meshed, and the second gear and the third gear 22 are coaxially arranged; the oil retaining shell 30 includes: a first shell 31, a second shell 32 and a third shell 33, the first shell 31, the second shell 32 and the third shell 33 are connected to each other and are respectively arranged on at least part of the outer periphery of the first gear 21, at least part of the outer periphery of the second gear and at least part of the outer periphery of the third gear 22. Therefore, the first shell 31, the second shell 32 and the third shell 33 are respectively suitable for blocking the lubricating liquid at the bottom of the accommodating cavity from contacting the first gear 21, the second gear and the third gear 22, thereby reducing the resistance encountered by the first gear 21, the second gear and the third gear 22 when rotating, reducing the efficiency loss of the reducer assembly 1, and increasing the output torque of the reducer assembly 1.

[0043] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, the oil discharge port 311 and the oil overflow port 312 are formed in the first housing 31 .

[0044] In some embodiments, the first gear 21 is configured as a differential gear, and the diameter of the first gear 21 is greater than the diameters of the second gear and the third gear 22. Therefore, when the reducer assembly 1 is not in operation, at least a portion of the first gear 21 is immersed in the lubricating fluid, and the second gear and the third gear 22 are located above the lubricating fluid. Therefore, the oil discharge port 311 and the oil overflow port 312 are formed in the first housing 31 to reduce the contact area between the first gear 21 and the lubricating fluid, reduce the resistance encountered by the first gear 21 when rotating, and thus reduce the efficiency loss of the reducer assembly 1. It can be understood that when the vehicle shakes, the reducer assembly 1 will move up and down with the vehicle, causing the lubricating fluid at the bottom of the accommodating chamber to splash. The second housing 32 and the third housing 33 can prevent the splashed lubricating fluid from contacting the second gear and the third gear 22, thereby reducing the resistance encountered by the second gear and the third gear 22 when rotating, and reducing the efficiency loss of the reducer assembly 1.

[0045] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, the oil discharge port 311 extends in the circumferential direction of the first gear 21, and the oil overflow port 312 is configured as an oil overflow hole penetrating in the radial direction of the first gear 21; wherein the cross-sectional area of ​​the oil discharge port 311 is larger than that of the oil overflow hole.

[0046] In some embodiments, the oil unloading port 311 is located above the lubricating liquid at the bottom of the accommodating chamber. When the reducer assembly 1 is not operating, the oil overflow port 312 is immersed in the lubricating liquid at the bottom of the accommodating chamber, and the lubricating liquid stored at the bottom of the accommodating chamber will enter the first shell 31 through the oil overflow port 312. When the reducer assembly 1 is operating, the first gear 21 rotates and the meshing teeth of the first gear 21 push the lubricating liquid in the first shell 31 to be discharged from the oil unloading port 311. The cross-sectional area of ​​the oil unloading port 311 is larger than the cross-sectional area of ​​the oil overflow port 312, so that the speed at which the lubricating liquid is discharged from the first shell 31 is greater than the speed at which the lubricating liquid enters the first shell 31, thereby making the liquid level of the lubricating liquid in the first shell 31 lower than the liquid level of the lubricating liquid at the bottom of the accommodating chamber. Compared with not providing an oil baffle shell 30, the reducer assembly 1 of the present application is provided with an oil baffle shell 30, which can reduce the contact area between the meshing teeth of the first gear 21 and the lubricating liquid, thereby reducing the resistance encountered by the first gear 21 when it rotates. In some embodiments, when the reducer assembly 1 is operating, the liquid level of the lubricating fluid at the bottom of the accommodating chamber is located below the oil overflow port 312. At this time, the lubricating fluid entering the first housing 31 through the injector can be discharged through the oil discharge port 311 and the oil overflow port 312 respectively.

[0047] According to some embodiments of the present invention, Figure 1-Figure 4As shown, the line connecting the oil overflow hole and the center of the first gear 21 is orthogonal to the second wall, so that the oil overflow port 312 is located at the position of the first shell 31 closest to the second wall. When the reducer assembly 1 is running and the lubricating liquid at the bottom of the accommodating chamber is located below the first shell 31, the oil overflow port 312 can drain the lubricating liquid in the first shell 31, thereby preventing the lubricating liquid from being stored in the first shell 31 and causing the liquid level of the lubricating liquid at the bottom of the accommodating chamber to be too low, thereby preventing the oil injector from being unable to suck up the lubricating liquid due to the low liquid level of the lubricating liquid in the accommodating chamber.

[0048] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, an oil outlet 331 is formed on the third housing 33, and the oil outlet 331 is suitable for discharging the lubricating liquid in the third housing 33. In some embodiments, the line connecting the oil outlet 331 and the center of the third gear 22 is orthogonal to the second wall surface, which improves the discharge efficiency of the lubricating liquid in the third housing 33 and ensures that the lubricating liquid in the third housing 33 can be completely discharged. The second housing 32 is configured to be open in the axial direction of the second gear, so that the lubricating liquid entering the second housing 32 can be discharged through the open port of the second housing 32, and the axial direction of the first gear 21 is parallel to the axial direction of the second gear.

[0049] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, the first shell 31 and / or the third shell 33 is formed with a first fixing portion 34 extending in the axial direction, and the inner wall of the main shell is formed with a second fixing portion suitable for cooperating with the first fixing portion 34, and the first fixing portion 34 cooperates with the second fixing portion to fix the oil retaining shell 30 in the accommodating cavity.

[0050] In some embodiments, a first fixing portion 34 is formed at at least one end of the first shell 31 in the axial direction of the first gear 21, and the first fixing portion 34 extends toward the main shell and cooperates with the second fixing portion of the main shell, so that the oil baffle shell 30 can be fixed in the accommodating cavity, so that the oil baffle shell 30 can be stably set in a preset position; in other embodiments, a first fixing portion 34 is provided at one end of the third shell 33 in the axial direction of the third gear 22, and the first fixing portion 34 extends toward the main shell and cooperates with the second fixing portion of the main shell to fix the oil baffle shell 30 in the accommodating cavity, and the axial direction of the first gear 21 is parallel to the axial direction of the third gear 22; in other embodiments, a first fixing portion 34 is formed at at least one end of the first shell 31 in the axial direction of the first gear 21, and a first fixing portion 34 is provided at one end of the third shell 33 in the axial direction of the third gear 22, and the first fixing portion 34 extends toward the main shell and cooperates with the second fixing portion of the main shell to fix the oil baffle shell 30 in the accommodating cavity.

[0051] According to some embodiments of the present invention, Figure 1-Figure 4As shown, the second housing 32 is formed with a connecting leg 321 extending in the radial direction, and the free end of the connecting leg 321 is connected to the main housing. In some embodiments, the first housing 31 and the third housing 33 are both provided with a first fixing portion 34, and the first fixing portion 34 cooperates with the second fixing portion to fix the oil retaining shell 30 in the accommodating cavity, and the connecting leg 321 provided on the second housing 32 is connected to the inner wall of the main housing to further improve the fixing stability of the oil retaining shell 30.

[0052] According to some embodiments of the present invention, Figure 1-Figure 4 As shown, the main housing includes: a first housing 11 and a second housing 12. A receiving cavity is formed in the first housing 11, and the receiving cavity is open along the axial direction of the transmission gear. The second housing 12 is arranged at the open end of the first housing 11 and closes the receiving cavity. The oil retaining shell 30 is fixedly connected to the first housing 11 and the second housing 12 respectively. It can be understood that the oil retaining shell 30, the oil injection nozzle and a plurality of transmission gears are installed in the receiving cavity through the open end of the first housing 11, and after the oil retaining shell 30, the oil injection nozzle and a plurality of transmission gears are installed, the second housing 12 is connected to the first housing 11 to close the receiving cavity, thereby improving the assembly efficiency of the reducer assembly 1. At the same time, the first housing 11 and the second housing 12 fix the oil retaining shell 30 respectively, thereby improving the fixing stability of the oil retaining shell 30.

[0053] The vehicle according to the present invention will be briefly described below.

[0054] The vehicle according to the present invention is provided with the reducer assembly 1 of the above embodiment. Since the vehicle according to the present invention is provided with the reducer assembly 1 described in any one of the above embodiments, the efficiency loss of the reducer assembly 1 of the vehicle is small, so that the power of the vehicle is good.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0056] While embodiments of the present invention have been shown and described above, changes, modifications, substitutions and variations may be made to the embodiments described above.

Claims

1. A reducer assembly for a vehicle, characterized in that: include: A main housing; a receiving cavity is formed in the main housing, and the receiving cavity has a first wall surface and a second wall surface spaced apart from each other; a transmission gear, wherein the transmission gear is configured as a plurality of gears meshing with each other and accommodated in the accommodation cavity, an oil spray nozzle, the oil spray nozzle being arranged on the first wall surface and being adapted to spray oil toward the transmission gear; An oil deflector shell is contained in the accommodating cavity, and the oil deflector shell is disposed on at least a portion of the outer periphery of the transmission gear and is located between the second wall surface and the transmission gear.

2. The reducer assembly for a vehicle according to claim 1, characterized in that: The oil retaining shell is formed with an oil discharge port which penetrates in the radial direction.

3. The reducer assembly for a vehicle according to claim 2, characterized in that: An oil overflow port is formed on the oil retaining shell, and the oil overflow port is located on a side of the oil discharge port close to the second wall surface.

4. The reducer assembly for a vehicle according to claim 3, characterized in that: The transmission gear comprises: a first gear, a second gear and a third gear, the first gear is meshed with the second gear, and the second gear is coaxially arranged with the third gear; The oil retaining housing includes: a first housing, a second housing and a third housing, which are connected to each other and are respectively arranged on at least a portion of the outer periphery of the first gear, at least a portion of the outer periphery of the second gear and at least a portion of the outer periphery of the third gear.

5. The reducer assembly for a vehicle according to claim 4, characterized in that: The oil discharge port and the oil overflow port are formed in the first shell.

6. The reducer assembly for a vehicle according to claim 5, characterized in that: The oil discharge port extends in the circumferential direction of the first gear, and the oil overflow port is configured as an oil overflow hole penetrating in the radial direction of the first gear; wherein The cross-sectional area of ​​the oil unloading port is larger than the cross-sectional area of ​​the oil overflow hole.

7. The reducer assembly for a vehicle according to claim 6, characterized in that: A line connecting the oil overflow hole and the center of the first gear is orthogonal to the second wall surface.

8. The reducer assembly for a vehicle according to claim 4, characterized in that: An oil outlet is formed on the third housing, and the oil outlet is suitable for discharging the lubricating liquid in the third housing.

9. The reducer assembly for a vehicle according to claim 4, characterized in that: The first shell and / or the third shell is formed with a first fixing portion extending in the axial direction, and the inner wall of the main shell is formed with a second fixing portion suitable for cooperating with the first fixing portion, and the first fixing portion cooperates with the second fixing portion to fix the oil retaining shell in the accommodating cavity.

10. The reducer assembly for a vehicle according to claim 9, characterized in that: The second shell is formed with a connecting leg extending in a radial direction, and a free end of the connecting leg is connected to the main shell.

11. The reducer assembly for a vehicle according to claim 1, characterized in that: The main housing comprises: A first housing, wherein the accommodating cavity is formed in the first housing and is open in the axial direction of the transmission gear; A second shell is arranged at the open end of the first shell and closes the accommodating cavity, and the oil retaining shell is fixedly connected to the first shell and the second shell respectively.

12. A vehicle, characterized in that: A reducer assembly for a vehicle comprising any one of claims 1-11.

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