Speed reducer assembly, electric drive axle and automobile

Abstract

The invention discloses a speed reducer assembly, an electric drive axle and an automobile, and relates to the technical field of electric drive axles, the speed reducer assembly comprises a shell, a motor assembly, a gear assembly and a plugging assembly, and a through hole is formed in the shell and provided with a containing cavity; the motor assembly is arranged in the containing cavity and comprises a driving motor and a rotating shaft, and the driving motor is arranged on one side of the containing cavity; the gear assembly is arranged in the containing cavity and comprises a driving gear shaft and a driving gear arranged on the driving gear shaft in a sleeving mode, the driving motor is in transmission connection with the driving gear shaft through a rotating shaft, a spline groove facing the through hole is formed in the end, close to the driving gear shaft, of the rotating shaft, and one end of the driving gear shaft is connected with the spline groove of the rotating shaft in a matched mode. The other end corresponds to the through hole and is provided with a lubricating channel communicated with the spline groove and the through hole; the plugging assembly comprises a plugging cover detachably installed on the shell. The technical scheme provided by the invention aims to quickly add the lubricating grease so as to reduce the maintenance cost of the speed reducer assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of electric drive axles, and particularly to a reducer assembly, an electric drive axle, and an automobile. Background Art

[0002] In the existing reducer assembly, the driving gear shaft is connected to the rotor shaft of the motor through a spline, and only a layer of grease is applied at the connection during assembly for lubrication to reduce friction and improve service life. However, the grease will gradually lose over time, resulting in increased friction, affecting the performance and life of the reducer assembly. Therefore, it is necessary to disassemble the reducer assembly for regular maintenance, increasing the maintenance cost. Summary of the Invention

[0003] The main object of the present invention is to provide a reducer assembly, an electric drive axle, and an automobile, aiming to quickly add grease to reduce the maintenance cost of the reducer assembly.

[0004] To achieve the above object, the present invention provides a reducer assembly, including:

[0005] A housing having a through hole and an accommodation cavity therein;

[0006] A motor assembly disposed in the accommodation cavity, including a driving motor and a rotating shaft, the driving motor being disposed on one side of the accommodation cavity;

[0007] A gear assembly disposed in the accommodation cavity, the gear assembly including a driving gear shaft and a driving gear sleeved on the driving gear shaft, the driving motor being in transmission connection with the driving gear shaft through the rotating shaft, and a spline groove facing the through hole being provided at one end of the rotating shaft close to the driving gear shaft, one end of the driving gear shaft being in mating connection with the spline groove of the rotating shaft, the other end of the driving gear shaft corresponding to the through hole and having a lubrication channel communicating the spline groove with the through hole, the lubrication channel being used for adding grease; and,

[0008] A plugging assembly including a plugging cover, the plugging cover being detachably mounted on the housing corresponding to the through hole to enable the through hole to be closed or opened.

[0009] In one embodiment, the lubrication channel includes a main oil channel and a plurality of branch oil channels communicating with the main oil channel, the main oil channel communicating with the through hole, and the plurality of branch oil channels communicating with the spline groove.

[0010] In one embodiment, the plurality of branch oil channels at least include a first oil channel and a second oil channel, the first oil channel extending along the axial direction of the driving gear shaft, and the second oil channel extending along the radial direction of the driving gear shaft; and / or,

[0011] The cross-sectional area of ​​the main oil passage is greater than the cross-sectional area of ​​the branch oil passage.

[0012] In one embodiment, the driving gear shaft and the groove bottom of the spline groove are clearance-matched to form an oil storage cavity.

[0013] In one embodiment, a sealing member is provided at the notch of the spline groove, and the sealing member is used to seal the notch of the spline groove so as to separate the spline groove from the accommodating cavity.

[0014] In one embodiment, the sealing member includes a sealing ring, a limiting groove is provided at a notch of the driving gear shaft corresponding to the spline groove, and the sealing ring is embedded in the limiting groove.

[0015] In one embodiment, a one-way valve is provided at one end of the driving gear shaft close to the through hole corresponding to the lubrication passage, and the one-way valve conducts one-way flow from the through hole to the lubrication passage.

[0016] In one embodiment, the one-way valve includes a grease nipple, the oil outlet end of the grease nipple is threadedly connected to the lubrication channel through the through hole, the oil inlet end of the grease nipple extends to the outside of the housing through the through hole, and the blocking cap is convexly arranged in a direction away from the housing at a position corresponding to the oil inlet end of the grease nipple to form an escape space between the grease nipple and the oil inlet end of the grease nipple; and / or,

[0017] The shell is provided with a mounting hole on the peripheral side corresponding to the through hole, the blocking cover is provided with a through hole at a position corresponding to the mounting hole, and the blocking assembly further includes a fixing bolt, which passes through the through hole and is threadedly connected to the mounting hole.

[0018] The present invention further provides an electric drive axle, including a reducer assembly, wherein the reducer assembly includes:

[0019] The shell has a through hole inside which is provided with a receiving cavity;

[0020] A motor assembly is arranged in the accommodating cavity, comprising a driving motor and a rotating shaft, wherein the driving motor is arranged on one side of the accommodating cavity;

[0021] A gear assembly is arranged in the accommodating cavity, the gear assembly includes a driving gear shaft and a driving gear sleeved on the driving gear shaft, the driving motor is connected to the driving gear shaft through the rotating shaft, and the end of the rotating shaft close to the driving gear shaft is provided with a spline groove facing the through hole, one end of the driving gear shaft is matched with the spline groove of the rotating shaft, the other end of the driving gear shaft is arranged corresponding to the through hole, and a lubrication channel connecting the spline groove and the through hole is opened, and the lubrication channel is used to add grease; and,

[0022] The plugging assembly includes a plugging cover, and the plugging cover is detachably mounted on the housing corresponding to the through hole so that the through hole can be closed or opened.

[0023] The present invention also provides an automobile, including an electric drive axle, and the electric drive axle includes a reducer assembly, and the reducer assembly includes:

[0024] A housing having an accommodation cavity with a through hole provided therein;

[0025] A motor assembly disposed in the accommodation cavity, including a driving motor and a rotating shaft, and the driving motor is disposed on one side of the accommodation cavity;

[0026] A gear assembly disposed in the accommodation cavity, the gear assembly includes a driving gear shaft and a driving gear sleeved on the driving gear shaft, the driving motor is in transmission connection with the driving gear shaft through the rotating shaft, and a spline groove facing the through hole is provided at one end of the rotating shaft close to the driving gear shaft, one end of the driving gear shaft is in mating connection with the spline groove of the rotating shaft, the other end of the driving gear shaft corresponds to the through hole and is provided with a lubrication channel communicating the spline groove with the through hole, and the lubrication channel is used for adding grease; and,

[0027] The plugging assembly includes a plugging cover, and the plugging cover is detachably mounted on the housing corresponding to the through hole so that the through hole can be closed or opened.

[0028] The technical solution of the present invention provides a space and a structural basis for the installation of other components by providing a through hole and an accommodation cavity inside the housing, and the design of the through hole facilitates subsequent operations such as lubrication. By disposing the driving motor on one side of the accommodation cavity, the driving motor is in transmission connection with the driving gear shaft through the rotating shaft to achieve power transmission. The spline groove design at the other end facilitates mating connection with the driving gear shaft to ensure the stability of transmission. By mating connection between the driving gear shaft and the spline groove of the rotating shaft, power transmission is achieved. By providing a lubrication channel at the other end of the driving gear shaft, grease can be conveniently added, reducing the friction at the spline connection, improving the transmission efficiency and service life. By detachably mounting the plugging cover corresponding to the through hole on the housing, the closing or opening of the through hole can be flexibly controlled. When operations such as adding grease are not required, the through hole can be closed to prevent impurities from entering, etc. When needed, it can be opened for corresponding operations. In summary, when grease needs to be added to the spline connection, the plugging cover can be opened to inject grease into the lubrication channel, so that it is not necessary to disassemble the reducer assembly, and grease can be quickly added to reduce the maintenance cost of the reducer assembly. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0030] Figure 1 Schematic structural diagram of an embodiment of the speed reducer assembly provided by the present invention;

[0031] Figure 2 For Figure 1 Partial enlarged view at position A in

[0032] Figure 3 For Figure 1 Partial enlarged view at position B in

[0033] Explanation of reference numerals in the drawings:

[0034] 100, speed reducer assembly;

[0035] 1, housing; 11, accommodation cavity; 12, through hole; 2, motor assembly; 21, drive motor; 22, rotating shaft; 221, spline groove; 222, oil storage cavity;

[0036] 3, gear assembly; 31, driving gear shaft; 32, lubrication channel; 321, main oil channel; 322, branch oil channel; 3221, first oil channel; 3222, second oil channel;

[0037] 4, plugging assembly; 41, plugging cover;

[0038] 5, seal; 51, sealing ring;

[0039] 6, one-way valve; 61, grease nipple;

[0040] 7, fixing bolt.

[0041] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the drawings. Detailed implementation manners

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0043] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] In the prior art, the driving gear shaft in the speed reducer assembly is connected to the rotor shaft of the motor through a spline, and only a layer of grease applied during assembly is used for lubrication at the connection to reduce friction and improve service life. However, the grease will gradually be lost as the use time prolongs, resulting in increased friction and affecting the performance and life of the speed reducer assembly. Therefore, it is necessary to disassemble the speed reducer assembly for regular maintenance, increasing the maintenance cost.

[0046] To solve the above technical problems, as Figure 1 and Figure 2As shown in the figure, the present invention provides a reducer assembly 100, which includes a housing 1, a motor assembly 2, a gear assembly 3, and a plugging assembly 4. There is a through hole 12 inside the housing 1, and a receiving cavity 11 is provided; the motor assembly 2 is arranged in the receiving cavity 11, including a driving motor 21 and a rotating shaft 22, and the driving motor 21 is arranged on one side of the receiving cavity 11; the gear assembly 3 is arranged in the receiving cavity 11, and the gear assembly 3 includes a driving gear shaft 31 and a driving gear sleeved on the driving gear shaft 31. The driving motor 21 is drivingly connected to the driving gear shaft 31 through the rotating shaft 22. One end of the rotating shaft 22 close to the driving gear shaft 31 is provided with a spline groove 221 facing the through hole 12. One end of the driving gear shaft 31 is connected to the spline groove 221 of the rotating shaft 22 in a matching manner. The other end of the driving gear shaft 31 is arranged corresponding to the through hole 12, and a lubrication channel 32 communicating the spline groove 221 with the through hole 12 is opened. The lubrication channel 32 is used for adding grease; the plugging assembly 4 includes a plugging cover 41, and the plugging cover 41 is detachably installed on the housing 1 corresponding to the through hole 12, so that the through hole 12 can be closed or opened.

[0047] The technical solution of the present invention provides a space and a structural basis for the installation of other components by arranging a through hole 12 and a receiving cavity 11 inside the housing 1. The design of the through hole 12 facilitates subsequent lubrication and other operations. By arranging the driving motor 21 on one side of the receiving cavity 11, the driving motor 21 is drivingly connected to the driving gear shaft 31 through the rotating shaft 22 to achieve power transmission. The design of the spline groove 221 at the other end facilitates the mating connection with the driving gear shaft 31 to ensure the stability of the transmission. The power is transmitted through the mating connection between the driving gear shaft 31 and the spline groove 221 of the rotating shaft 22. By opening a lubrication channel 32 at the other end of the driving gear shaft 31, grease can be conveniently added, reducing the friction at the spline connection, improving the transmission efficiency and service life. By detachably installing the plugging cover 41 corresponding to the through hole 12 on the housing 1, the closing or opening of the through hole 12 can be flexibly controlled. When operations such as adding grease are not required, the through hole 12 can be closed to prevent impurities from entering, etc. When needed, it can be opened for corresponding operations. In summary, when it is necessary to add grease to the spline connection, the plugging cover 41 can be opened to inject grease into the lubrication channel 32, so that the reducer assembly 100 does not need to be disassembled, and grease can be quickly added to reduce the maintenance cost of the reducer assembly 100.

[0048] It can be understood that the lubrication channel 32 can be a single channel. However, the design of a single channel may not be able to evenly distribute the grease, affecting the lubrication effect. Therefore, in one embodiment, the lubrication channel 32 includes a main oil passage 321 and a plurality of branch oil passages 322 communicating with the main oil passage 321. The main oil passage 321 communicates with the through hole 12, and the plurality of branch oil passages 322 communicate with the spline groove 221. With such a setting, the grease can be more evenly distributed to the spline groove 221 through the plurality of branch oil passages 322, ensuring that the mating connection part between the rotating shaft 22 and the driving gear shaft 31 can be fully lubricated. The main oil passage 321 communicates with the through hole 12, enabling the externally added grease to smoothly enter the lubrication channel 32 and then flow to the spline groove 221 through the plurality of branch oil passages 322 respectively, avoiding the problem of uneven lubrication that may occur in a single channel. Thus, the lubrication effect is greatly improved, effectively reducing wear and failures caused by poor lubrication, and extending the service life of the reducer assembly 100.

[0049] Further, in one embodiment, the plurality of branch oil passages 322 at least include a first oil passage 3221 and a second oil passage 3222. The first oil passage 3221 extends along the axial direction of the driving gear shaft 31, and the second oil passage 3222 extends along the radial direction of the driving gear shaft 31. With such a setting, by the first oil passage 3221 extending along the axial direction of the driving gear shaft 31, the grease can be conveyed along the axial direction of the shaft to the axial part of the spline groove 221, ensuring good lubrication of the axial contact part; the second oil passage 3222 extends along the radial direction of the driving gear shaft 31, and can evenly distribute the grease to the radial part of the spline groove 221, enabling the entire circumferential surface of the spline groove 221 to be lubricated. In this way, the lubrication requirements of the spline groove 221 at different positions can be comprehensively met, further improving the lubrication effect and reducing problems such as jamming and wear that may be caused by incomplete lubrication.

[0050] In order to enable the grease to flow from the main oil passage 321 into the branch oil passages 322, in one embodiment, the cross-sectional area of the main oil passage 321 is larger than that of the branch oil passages 322. With such a setting, when the grease is externally added to the main oil passage 321, due to the large cross-sectional area of the main oil passage 321, the pressure is relatively small, while the cross-sectional area of the branch oil passages 322 is small and the pressure is relatively large. In this way, a pressure difference will be formed, enabling the grease to flow more smoothly from the main oil passage 321 into the branch oil passages 322. This design can ensure that the grease can stably flow to each branch oil passage 322 and then be evenly distributed to the parts that need to be lubricated. Further, the cross-sectional area of the first oil passage 3221 is larger than that of the second oil passage 3222. With such a setting, it can ensure that the grease preferentially flows to the circumferential part, that is, the spline connection part, thus forming a more effective lubricating layer at the key part and reducing frictional losses.

[0051] It is understandable that the grease will gradually be lost over time. For example, it may leak or be lost under high-temperature conditions, and thus the grease needs to be replenished regularly. For this purpose, in one embodiment, the driving gear shaft 31 and the bottom of the spline groove 221 are in clearance fit to form an oil storage cavity 222. With such a setting, a certain amount of grease can be stored through the oil storage cavity 222. When the grease is lost, the grease in the oil storage cavity 222 can continue to lubricate the mating part between the driving gear shaft 31 and the spline groove 221, playing a certain buffering and replenishing role, thereby reducing the frequency of adding grease, extending the maintenance cycle, and reducing the maintenance cost.

[0052] In order to reduce the loss of the grease from the notch of the spline groove 221, in one embodiment, a seal 5 is provided at the notch of the spline groove 221. The seal 5 is used to seal the notch of the spline groove 221 so as to isolate the spline groove 221 from the accommodating cavity. With such a setting, through the seal 5 at the notch of the spline groove 221 and isolating the spline groove 221 from the accommodating cavity, the loss of the grease from the notch is reduced. During the operation of the device, due to external factors such as pressure changes and vibrations, there is a possibility that the grease may seep out from the notch. The function of the seal 5 is to form a sealed boundary to reduce the leakage of the grease through the notch outward. This can make the grease act more concentratedly on the parts that need lubrication at the spline connection, thereby improving the operation stability and reliability of the device and reducing the maintenance cost.

[0053] It is understandable that the seal 5 can be in various forms, such as sealant, gasket, or sealing ring 51, etc. The appropriate sealing form is selected according to the specific application environment and requirements. Specifically, in one embodiment, a limiting groove is provided at the position of the driving gear shaft 31 corresponding to the notch of the spline groove 221, and the sealing ring 51 is embedded in the limiting groove. With such a setting, the limiting groove provides an accurate installation position and guidance for the sealing ring 51, ensuring that the sealing ring 51 can be accurately installed at the predetermined position, thereby better playing the sealing role. The sealing ring 51 is embedded in the limiting groove, enabling it to closely fit with the surface around the notch, forming a more reliable sealed boundary, effectively reducing the entry of impurities, dust, etc. into the interior of the spline groove 221, and avoiding adverse effects on the transmission components.

[0054] In order to reduce the loss of the added grease from the lubrication channel 32, such as Figure 3As shown, in one embodiment, a check valve 6 is provided at one end of the driving gear shaft 31 close to the through hole 12 corresponding to the lubricating channel 32, and the check valve 6 is unidirectionally conductive from the through hole 12 to the lubricating channel 32. With this arrangement, the unidirectional conduction from the through hole 12 to the lubricating channel 32 through the check valve 6 can effectively reduce the loss of the added grease from the lubricating channel 32. This unidirectional conduction characteristic of the check valve 6 allows the grease to only flow from the through hole 12 to the lubricating channel 32 and not flow back in the reverse direction. In this way, the grease can smoothly enter the lubricating channel 32 through the check valve 6 to effectively lubricate the spline connection, and the grease will not flow back from the lubricating channel 32 due to external factors or pressure changes during the operation of the equipment, thus ensuring the continuity and effectiveness of lubrication, extending the service life of the equipment and reducing the maintenance cost.

[0055] Specifically, in one embodiment, the check valve 6 includes a grease nipple 61. The oil outlet end of the grease nipple 61 is threadedly connected to the lubricating channel 32 through the through hole 12, and the oil inlet end of the grease nipple 61 extends to the outside of the housing 1 through the through hole 12. The plugging cover 41 protrudes away from the housing 1 at a position corresponding to the oil inlet end of the grease nipple 61, so as to form a clearance space with the oil inlet end of the grease nipple 61. With this arrangement, the oil outlet end of the grease nipple 61 is threadedly connected to the lubricating channel 32 through the through hole 12, ensuring the tightness and stability of the connection and enabling the grease to smoothly flow from the oil outlet end into the lubricating channel 32. The oil inlet end of the grease nipple 61 extends to the outside through the through hole 12, facilitating the addition of grease, and grease can be directly injected into the oil inlet end of the grease nipple 61 from the outside. The plugging cover 41 protrudes away from the housing 1 at a position corresponding to the oil inlet end of the grease nipple 61, forming a clearance space with the oil inlet end of the grease nipple 61. When the equipment is operating, various vibrations, displacements, etc. may occur. If there is no clearance space formed between the plugging cover 41 and the oil inlet end of the grease nipple 61, they are likely to come into contact, collide or even interfere with each other during these movements, resulting in abnormal operation of the equipment or even damage to the grease nipple 61 or the plugging cover 41. The existence of the clearance space effectively avoids this interference phenomenon and ensures the stable operation of the equipment under various working conditions.

[0056] In one embodiment, mounting holes are provided on the circumferential side of the housing 1 corresponding to the through holes 12. Through holes are formed in the plugging cover 41 at positions corresponding to the mounting holes. The plugging assembly 4 further includes fixing bolts 7. The fixing bolts 7 pass through the through holes and are threadedly connected to the mounting holes. With such an arrangement, by the threaded connection between the fixing bolts 7 and the mounting holes, the plugging cover 41 can be firmly fixed to the housing 1, ensuring that the plugging cover 41 will not loosen or fall off during use, so as to stably play its plugging role and prevent external impurities, etc. from entering the accommodating cavity 11 of the housing 1, enabling the overall to operate stably. In addition, this connection method facilitates installation and disassembly. When maintenance, repair or component replacement of the lubrication system is required, the plugging cover 41 can be conveniently removed by disassembling the fixing bolts 7 for corresponding operations, and then the plugging cover 41 can be reinstalled. The operation is relatively convenient, improving the efficiency of maintenance and repair.

[0057] The present invention also provides an electric drive axle, which includes a reducer assembly 100. The specific structure of the reducer assembly 100 refers to the above embodiments. Since this electric drive axle adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0058] The present invention also provides a vehicle, which includes an electric drive axle. The specific structure of the electric drive axle refers to the above embodiments. Since this vehicle adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0059] The above are only exemplary embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A reducer assembly, characterized in that: include: The shell has a through hole inside which is provided with a receiving cavity; A motor assembly is arranged in the accommodating cavity, comprising a driving motor and a rotating shaft, wherein the driving motor is arranged on one side of the accommodating cavity; A gear assembly is arranged in the accommodating cavity, the gear assembly includes a driving gear shaft and a driving gear sleeved on the driving gear shaft, the driving motor is connected to the driving gear shaft through the rotating shaft, and the end of the rotating shaft close to the driving gear shaft is provided with a spline groove facing the through hole, one end of the driving gear shaft is matched with the spline groove of the rotating shaft, the other end of the driving gear shaft is arranged corresponding to the through hole, and a lubrication channel connecting the spline groove and the through hole is opened, and the lubrication channel is used to add grease; and, The blocking assembly comprises a blocking cover, wherein the blocking cover is detachably mounted on the shell corresponding to the through hole so that the through hole can be closed or opened.

2. The reducer assembly according to claim 1, characterized in that: The lubrication passage includes a main oil passage and a plurality of branch oil passages communicating with the main oil passage, the main oil passage is communicating with the through hole, and the plurality of branch oil passages are communicating with the spline groove.

3. The reducer assembly according to claim 2, characterized in that: The plurality of branch oil passages at least include a first oil passage and a second oil passage, wherein the first oil passage extends axially along the driving gear shaft, and the second oil passage extends radially along the driving gear shaft; and / or, The cross-sectional area of ​​the main oil passage is greater than the cross-sectional area of ​​the branch oil passage.

4. The reducer assembly according to claim 2, characterized in that: The driving gear shaft and the groove bottom of the spline groove are clearance-matched to form an oil storage cavity.

5. The reducer assembly according to claim 1, characterized in that: The notch of the spline groove is provided with a sealing member, and the sealing member is used to seal the notch of the spline groove so as to separate the spline groove from the accommodating cavity.

6. The reducer assembly according to claim 5, characterized in that: The sealing member comprises a sealing ring, a limiting groove is arranged at the notch of the driving gear shaft corresponding to the spline groove, and the sealing ring is embedded in the limiting groove.

7. The reducer assembly according to claim 1, characterized in that: A one-way valve is provided at one end of the driving gear shaft close to the through hole corresponding to the lubrication passage, and the one-way valve conducts one-way flow from the through hole to the lubrication passage.

8. The reducer assembly according to claim 1, characterized in that: The one-way valve comprises a grease nipple, the oil outlet end of the grease nipple is threadedly connected to the lubrication channel through the through hole, the oil inlet end of the grease nipple extends to the outside of the housing through the through hole, and the blocking cap is convexly arranged in a direction away from the housing at a position corresponding to the oil inlet end of the grease nipple to form an escape space between the grease nipple and the oil inlet end of the grease nipple; and / or, The shell is provided with a mounting hole on the peripheral side corresponding to the through hole, the blocking cover is provided with a through hole at a position corresponding to the mounting hole, and the blocking assembly further includes a fixing bolt, which passes through the through hole and is threadedly connected to the mounting hole.

9. An electric drive bridge, characterized in that: A reducer assembly comprising any one of claims 1 to 8.

10. An automobile, characterized in that: Includes the electric drive axle as claimed in claim 9.

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