Speed reducer assembly and rear axle assembly with same

Abstract

The utility model provides a speed reducer and a rear axle assembly with the speed reducer, and belongs to the technical field of vehicles, the speed reducer comprises a shell assembly, a rotating shaft assembly, a gear assembly, a differential mechanism and an oil guide structure, and the inner wall of the shell assembly is provided with two installation parts used for installing the rotating shaft assembly; the two ends of the rotating shaft assembly are connected to the mounting parts correspondingly. The gear assembly comprises an input gear, an intermediate gear set and an output gear which are connected to the rotating shaft assembly. The differential is connected to the output gear; the oil guide structure comprises a first oil guide assembly used for guiding oil to the two installation parts and a second oil guide assembly used for guiding oil to the differential mechanism, the first oil guide assembly is connected to the inner wall of the shell assembly, and the second oil guide assembly is arranged above the output gear and the differential mechanism. A part of splashing lubricating oil can be collected, the collected lubricating oil is guided into the differential mechanism, the bearing and the oil seal to be lubricated and cooled, and the problems of ablation and failure of the bearing and the oil seal caused by high temperature are effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field, especially a kind of reducer assembly and rear axle assembly with it. BACKGROUND

[0002] The gear and bearing in the rear axle reducer of traditional fuel vehicle are all splash lubricated: gear oil is stirred by gear and splashed to each gear and bearing. Since the gear rotation speed is low, the gear, bearing and oil seal do not require high lubrication. With the continuous increase of motor speed, the gear and bearing in the rear axle reducer require higher lubrication. If the high-speed bearing and oil seal of the shaft are not lubricated and cooled by sufficient lubricating oil, they are likely to be ablated and fail due to high temperature. SUMMARY

[0003] The first technical problem to be solved by the utility model is to provide a reducer assembly that can collect a part of the splashed lubricating oil by setting the oil guide structure, guide the collected lubricating oil to the bearing and oil seal for lubrication and cooling, effectively prevent the bearing and oil seal from being ablated and failing due to high temperature, and improve the lubrication and cooling effect of the gear assembly, bearing, oil seal and differential and the reliability of the product.

[0004] The technical solution adopted by the utility model in the first aspect is as follows: a reducer, comprising:

[0005] a housing assembly;

[0006] a rotating shaft assembly connected to the inside of the housing assembly at both ends, wherein the inner wall of the housing assembly is provided with two mounting parts for mounting the rotating shaft assembly;

[0007] a gear assembly comprising an input gear connected to the rotating shaft assembly, an intermediate gear set and an output gear;

[0008] a differential connected to the output gear;

[0009] an oil guide structure comprising a first oil guide assembly for guiding oil to the mounting part and a second oil guide assembly for guiding oil to the differential, the first oil guide assembly being connected to the inner wall of the housing assembly, and the second oil guide assembly being arranged above the output gear and the differential.

[0010] According to an embodiment of the utility model, the first oil guide assembly comprises:

[0011] a liquid holding tank for collecting and carrying lubricating oil;

[0012] Two U-shaped grooves corresponding to the two mounting portions, input ends of the two U-shaped grooves being connected to two ends of the liquid containing groove away from the output gear, output ends of the two U-shaped grooves extending towards the corresponding mounting portions to guide the lubricating oil in the liquid containing groove to the mounting portions.

[0013] A conveying groove connected between one of the U-shaped grooves and the liquid containing groove to shunt and convey the lubricating oil in the liquid containing groove to the corresponding U-shaped groove.

[0014] According to an embodiment of the present application, the liquid containing groove has a notch on a side close to the output gear to facilitate collection of part of the lubricating oil splashed from the output gear.

[0015] According to an embodiment of the present application, the rotating shaft assembly comprises an input shaft for connecting the input gear, and free ends of the U-shaped grooves extend outward along an axis direction of the input shaft and are connected to the mounting portions.

[0016] According to an embodiment of the present application, the rotating shaft assembly further comprises an intermediate shaft for mounting an intermediate gear set, and the mounting portions comprise:

[0017] A first mounting groove for mounting the input shaft;

[0018] A second mounting groove for mounting the intermediate shaft;

[0019] An oil guiding groove recessed outward from an inner wall of the housing assembly and connected to the first mounting groove and the second mounting groove, wherein the free ends of the U-shaped grooves are inserted into the oil guiding groove.

[0020] According to an embodiment of the present application, the oil guiding groove comprises:

[0021] A main groove body connected to the U-shaped grooves;

[0022] A first branch groove located below the main groove body and connected to the main groove body and the first mounting groove;

[0023] A second branch groove located below the main groove body and connected to the main groove body and the second mounting groove.

[0024] According to an embodiment of the present application, a projection cross section of the conveying groove in a horizontal direction is in an L shape, and the liquid containing groove, the conveying groove and the corresponding U-shaped groove surround to form an avoiding hole.

[0025] According to an embodiment of the present application, the second oil guiding assembly comprises:

[0026] L-shaped plate, a horizontal section of which is above the output gear, and a vertical section of which extends towards the differential;

[0027] ear plate, one end of which is connected to the vertical section of the L-shaped plate, and the other end of which extends towards the output gear.

[0028] According to an embodiment of the present application, the shell assembly comprises a shell and an end cover, the shell and the end cover are connected and surround to form the cavity, the shell and the end cover are respectively provided with the mounting portion for mounting the rotating shaft assembly, the shell and the end cover are respectively provided with a threaded column for mounting the first oil guide assembly, and the first oil guide assembly is screw-connected to the threaded column.

[0029] The technical scheme adopted by the second aspect of the present application is a rear axle assembly, which comprises:

[0030] The speed reducer described in any of the above, the speed reducer further comprises a differential connected to the output gear;

[0031] The axle housing comprises a bridge package, the differential and the output gear are inserted into the bridge package, and the second oil guide assembly is connected to the inner wall of the bridge package.

[0032] Compared with the prior art, the present application has the following advantages or beneficial effects:

[0033] The first oil guide assembly is arranged to collect a part of the splashed lubricating oil, and the collected lubricating oil is guided to the bearing and the oil seal for lubrication and cooling, so that the problem of burning and failure of the bearing and the oil seal caused by high temperature can be effectively prevented, the lubrication and cooling effect of the gear assembly, the bearing and the oil seal is improved, and the reliability of the product is improved.

[0034] The second oil guide assembly is arranged to block a part of the splashed lubricating oil and make it flow into the differential, so as to improve the lubrication condition of the differential and effectively improve the problem of easy burning of the differential when the high-speed electric drive rear axle slips on one side tire. BRIEF DESCRIPTION OF DRAWINGS

[0035] The above and other features and advantages of the present application will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0036] Figure 1 is a schematic view of a speed reducer according to an example embodiment.

[0037] Figure 2 is a connection schematic view of a rotating shaft assembly, a gear assembly and a first oil guide assembly according to an example embodiment.

[0038] Figure 3 is a schematic view of a first oil guide assembly according to an exemplary embodiment.

[0039] Figure 4 is a sectional view of a housing according to an exemplary embodiment.

[0040] Figure 5 is a schematic view of an end cover according to an exemplary embodiment.

[0041] Figure 6 is a schematic view of a second oil guide assembly according to an exemplary embodiment.

[0042] Figure 7 is a schematic view of a rear axle assembly according to an exemplary embodiment.

[0043] Figure 8 is a partial sectional view of a rear axle assembly according to an exemplary embodiment.

[0044] BRIEF DESCRIPTION OF DRAWINGS

[0045] 1, housing assembly; 10, mounting portion; 101, first mounting groove; 102, second mounting groove; 103, oil guide groove; 1031, main groove body; 1032, first branch groove; 1033, second branch groove; 11, housing; 12, end cover; 13, threaded column;

[0046] 2, rotating shaft assembly; 21, input shaft; 22, intermediate shaft;

[0047] 3, gear assembly; 31, input gear; 32, intermediate gear set; 33, output gear;

[0048] 4, differential

[0049] 5, oil guide structure; 51, first oil guide assembly; 511, liquid containing groove; 5111, notch; 512, U-shaped groove; 513, conveying groove; 514, avoiding hole; 52, second oil guide assembly; 521, L-shaped plate; 522, ear plate;

[0050] 6, axle housing; 61, axle cover;

[0051] 7, drive motor. DETAILED DESCRIPTION

[0052] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, these embodiments can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus description of the same will be simplified or omitted.

[0053] The words "one", "an", "the", "said", are used to indicate the presence of one or more elements / components / etc.; the words "include" and "have" are used to mean an open-ended inclusion and refer to additional elements / components / etc. in addition to the listed elements / components / etc.

[0054] The utility model embodiment provides a kind of reducer, as shown in it, Figures 1-5 The assembly device includes a housing assembly 1, a rotating shaft assembly 2, a gear assembly 3, a differential 4, and an oil guide structure 5. The two ends of the rotating shaft assembly 2 are respectively connected to the inside of the housing assembly 1. The inner wall of the housing assembly 1 is provided with two mounting parts 10 for mounting the rotating shaft assembly 2. The gear assembly 3 includes an input gear 31 connected to the rotating shaft assembly 2, an intermediate gear set 32, and an output gear 33. The differential 4 is connected to the output gear 33. The oil guide structure 5 includes a first oil guide assembly 51 for guiding oil to the two mounting parts 10 and a second oil guide assembly 52 for guiding oil to the differential 4. The first oil guide assembly 51 is connected to the inner wall of the housing assembly 1, and the second oil guide assembly 52 is arranged above the output gear 33 and the differential 4. In this embodiment, the rotating shaft assembly 2 includes an input shaft 21, an intermediate shaft 22, bearings mounted at both ends of the input shaft 21 and the second rotating shaft 22, and an oil seal mounted at one end of the input shaft 21 close to the driving motor 7. The outer periphery of the bearing is connected to the mounting part 10. The inside of the housing assembly 1 is provided with lubricating oil, which is mainly used for lubricating the gear assembly 3, the bearing, and the differential 4. The oil seal can prevent the lubricating oil from entering the motor / electronic control. The first oil guide assembly 51 of the present application can collect a part of the splashed lubricating oil and guide the collected lubricating oil to the bearings and oil seals on both sides of the rotating shaft assembly 2 for lubrication and cooling. This can effectively prevent the bearings and oil seals from being ablated and failing due to high temperature, improve the lubrication and cooling effect of the gear assembly 3, the bearings, and the oil seal, and improve the reliability of the product. The second oil guide assembly 52 can block a part of the gear oil, allowing it to flow into the differential 4, improve the lubrication condition of the differential 4, and effectively improve the problem of easy ablation of the differential 4 when the high-speed electric drive rear axle slips on one side tire.

[0055] In a preferred embodiment of the utility model, as shown in Figures 1-5The first oil guide assembly 51 shown includes a liquid collecting groove 511, two U-shaped grooves 512 and a conveying groove 513. The liquid collecting groove 511 is used to collect and carry lubricating oil. The two U-shaped grooves 512 correspond to the two mounting portions 10 respectively. The input ends of the two U-shaped grooves 512 are connected to the two ends of the liquid collecting groove 511 away from the output gear 33 respectively. The output ends of the two U-shaped grooves 512 extend to the direction of the corresponding mounting portion 10 respectively to guide the lubricating oil in the liquid collecting groove 511 to the mounting portion. The conveying groove 513 is connected between one of the U-shaped grooves 512 and the liquid collecting groove 511 to shunt and convey the lubricating oil in the liquid collecting groove 511 to the corresponding U-shaped groove 512. In the embodiment, the liquid collecting groove 511 is located above the input gear 31 and the intermediate gear set 32 and only partially covers the input gear 31 and the intermediate gear set 32. Thus, the liquid collecting groove 511 can effectively collect part of the lubricating oil splashed from the input gear 31, the intermediate gear set 32 and the output gear 33. Each U-shaped groove 512 is communicated with the inside of the liquid collecting groove 511 to guide the lubricating oil in the liquid collecting groove 511 to the corresponding mounting portion 10. By corresponding one mounting portion 10 to one U-shaped groove 512, part of the splashed lubricating oil can be used to effectively lubricate the bearings and oil seals. The liquid collecting groove 511 can not only collect part of the splashed lubricating oil, but also guide the lubricating oil in the liquid collecting groove 511 to the U-shaped groove 512, further improving the lubrication and cooling effect of the bearings.

[0056] In a preferred embodiment of the present application, as shown in Figures 2-3 The side of the liquid collecting groove 511 close to the output gear 33 has a notch 5111 to facilitate the collection of part of the lubricating oil splashed from the output gear 33. In addition, in the embodiment, the side of the liquid collecting groove 511 close to the output gear 33 has a notch 5111 to better collect the lubricating oil splashed from the output gear 33 to provide sufficient lubricating oil for the bearings and oil seals. The lubricating oil collected by the liquid collecting groove 511 is conveyed to the bearings and oil seals at the two ends of the input shaft 21 through the two U-shaped grooves 512 above the liquid collecting groove 511. The structure is ingenious and reasonable, and effectively improves the lubrication and cooling effect of the lubricating oil on the gear assembly 3, bearings and oil seals.

[0057] In a preferred embodiment of the present application, as shown in Figures 2-5 The shaft assembly 2 includes an input shaft 21 for connecting the input gear 31. The free ends of the two U-shaped grooves 512 extend outward along the axis direction of the input shaft 21 and are connected to the mounting portions 10 respectively to convey the collected lubricating oil to the mounting portions 10 to achieve the purpose of lubricating and cooling the bearings.

[0058] In a preferred embodiment of the present application, as shown in Figures 4-5The rotating shaft assembly 2 shown further comprises a middle shaft 22 for mounting the intermediate gear set 32, the mounting portion 10 comprises a first mounting groove 101 for mounting the input shaft 21, a second mounting groove 102 for mounting the middle shaft 22 and an oil guide groove 103 recessed outwardly from the inner wall of the housing assembly 1 and communicated with the first mounting groove 101 and the second mounting groove 102, wherein the free end of the U-shaped groove 512 is inserted into the oil guide groove 103. In the application, the two ends of the input rotating shaft 21 and the middle shaft 22 are connected with the mounting portion 10, that is, two mounting portions 10 need to be arranged inside the housing assembly 1, and the two mounting portions 10 can be arranged on the housing 11 and the end cover 12 respectively, so that the machining and mounting are facilitated. The oil guide groove 103 can receive the lubricating oil delivered by the U-shaped groove 512 and deliver the lubricating oil to the first mounting groove 101 and the second mounting groove 102 respectively, so as to realize the lubricating and cooling effect on the bearing and the oil seal.

[0059] In a preferred embodiment of the present application, as shown in Figures 2-3 The oil guide groove 103 shown comprises a main groove body 1031, a first branch groove 1032 and a second branch groove 1033, the first branch groove 1032 and the second branch groove 1033 are both located below the main groove body 1031, the main groove body 1031 is communicated with the U-shaped groove 512, the first branch groove 1032 is communicated with the main groove body 1031 and the first mounting groove 101, and the second branch groove 1033 is communicated with the main groove body 1031 and the second mounting groove 102. Due to the structure that the first branch groove 1032 and the second branch groove 1033 are both located below the main groove body 1031, the lubricating oil in the main groove body 1031 can be completely distributed into the first mounting groove 101 and the second mounting groove 102 under the action of gravity, so as to improve the utilization rate and the lubricating effect of the lubricating oil and ensure that the bearing and the oil seal are lubricated and cooled in time.

[0060] In a preferred embodiment of the present application, as shown in Figures 2-3 The projection of the delivery groove 513 in the horizontal direction is L-shaped, the liquid containing groove 511, the delivery groove 513 and the corresponding U-shaped groove 512 surround to form the avoiding hole 514. In the embodiment, the projection of the delivery groove 513 in the horizontal direction is L-shaped, so that the axial projections of the avoiding hole 514 are partially overlapped with the input gear 31 and the intermediate gear set 32 respectively, which not only facilitates that the liquid containing groove 511, the delivery groove 513 and the corresponding U-shaped groove 512 can all collect part of the splashed lubricating oil and improve the collection efficiency to provide sufficient lubricating oil for the bearing and the oil seal, but also can improve the structural strength of the first oil guide assembly 51 and improve the service life of the product.

[0061] In a preferred embodiment of the present application, as shown in Figures 7-8The second oil guide assembly 52 shown comprises an L-shaped plate 521 and an ear plate 522, the horizontal section of the L-shaped plate 521 is located above the output gear 33, the vertical section of the L-shaped plate 521 extends from top to bottom to the direction of the differential 4, wherein the vertical section of the L-shaped plate 521 is connected to the bridge cover 61; one end of the ear plate 522 is connected to the vertical section of the L-shaped plate 521, and the other end of the ear plate 522 extends to the direction of the output gear 33. In the embodiment, the lubricating oil on the output gear 33 splashes to the L-shaped plate 521, the lubricating oil can flow to the vertical section of the L-shaped plate 521 through the horizontal section of the L-shaped plate 521 and then drip on the differential 4, the lubricating condition of the differential 4 is improved, and the problem that the differential 4 is easy to be ablated when the high-speed electric drive rear axle is in the condition that one tire slips is effectively improved. Wherein, the ear plate 522 not only can enhance the strength of the oil blocking structure 7, but also can guide the lubricating oil to drip on the differential 4, and improve the lubricating effect of the differential 4.

[0062] In a preferred embodiment of the utility model, as shown in Figures 4-5 The shell assembly 1 shown comprises a shell 11 and an end cover 12, the shell 11 and the end cover 12 are connected and surround to form a cavity, the shell 11 and the end cover 12 are respectively provided with a mounting portion 10 for mounting the rotating shaft assembly 2, the shell 11 and the end cover 12 are respectively provided with a threaded column 13 for mounting the first oil guide assembly 51, and the first oil guide assembly 51 is screw-connected to the threaded column 13. In the application, the shell assembly 1 adopts a split structure of the shell 11 and the end cover 12, and the mounting portion 10 cooperating with the rotating shaft assembly 2 and the threaded column 13 cooperating with the oil guide plate 41 are respectively arranged on the shell 11 and the end cover 12, which not only can reduce the difficulty in machining and assembling, but also is convenient to assemble, quick to maintain and compact in structure. In the embodiment, the liquid containing groove 511 away from the conveying groove 513 and the conveying groove 513 away from the liquid containing groove 511 are respectively connected with screws, the screws are connected with the threaded columns, and the first oil guide assembly 51 is fixed.

[0063] The utility model discloses an embodiment provides a rear axle assembly, like Figures 6-8As shown, the rear axle assembly includes the speed reducer as described above, an axle housing 6, the axle housing 6 including an axle pack 61, the differential 4 and the output gear 33 being inserted into the axle pack 61, a second oil guide assembly 52 being connected to the inner wall of the axle pack 61, the second oil guide assembly 52 being used to intercept part of the lubricating oil splashed from the output gear 33 and guide the lubricating oil to flow to the differential 4. Since the planetary gear of the differential 4 is in contact and frictional fit with the shaft, for a high-speed electric drive rear axle, it is more likely to cause the mating surface to be ablated and fail when one side tire slips. By providing the oil blocking structure 7, part of the splashed lubricating oil can be blocked and flow into the differential 4, improving the lubrication condition of the differential 4, and effectively improving the problem that the differential 4 is easily ablated when the high-speed electric drive rear axle slips on one side tire. In addition, the speed reducer can collect part of the splashed lubricating oil through the oil guide structure 4 and guide the lubricating oil to the two ends of the rotating shaft assembly 2, effectively solving the lubrication and cooling problems of the high-speed electric drive rear axle gear, bearing and oil seal, thereby improving the product reliability.

[0064] In the embodiments of the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, can also be detachable connection, or integral connection. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0065] In the description of the embodiments of the present application, it should be understood that the positions or position relationships indicated by the terms "upper", "lower" and the like are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or units referred to must have a specific direction, be constructed and operated in a specific position, and therefore cannot be understood as limiting the embodiments of the present application.

[0066] In the description of the present application, the description of the terms "one embodiment", "one preferred embodiment" and the like 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 application. In the present application, the illustrative description 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.

[0067] The above is only the preferred embodiment of the present application, and is not used to limit the embodiments of the present application. For those skilled in the art, the embodiments of the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A reducer assembly, characterized by, The application relates to a shell assembly (1), a rotating shaft assembly (2) connected to the inside of the shell assembly (1) at both ends, a gear assembly (3) comprising an input gear (31) connected to the rotating shaft assembly (2), an intermediate gear set (32) and an output gear (33), a differential (4) connected to the output gear (33), and an oil guiding structure (5) comprising a first oil guiding assembly (51) for guiding oil to the two mounting portions (10) and a second oil guiding assembly (52) for guiding oil to the differential (4), wherein the first oil guiding assembly (51) is connected to the inner wall of the shell assembly (1) and the second oil guiding assembly (52) is arranged above the output gear (33) and the differential (4). The first oil guiding assembly (51) comprises a liquid holding groove (511) for collecting and carrying lubricating oil, two U-shaped grooves (512) corresponding to the two mounting portions (10), input ends of the two U-shaped grooves (512) being connected to the two ends of the side of the liquid holding groove (511) away from the output gear (33), output ends of the two U-shaped grooves (512) extending towards the corresponding mounting portions (10) to guide the lubricating oil in the liquid holding groove (511) to the mounting portions, and a conveying groove (513) connected between one of the U-shaped grooves (512) and the liquid holding groove (511) to shunt and convey the lubricating oil in the liquid holding groove (511) to the corresponding U-shaped groove (512). The side of the liquid holding groove (511) close to the output gear (33) has a notch (5111) for collecting part of the lubricating oil splashed from the output gear (33). The rotating shaft assembly (2) comprises an input shaft (21) for connecting the input gear (31), and the free ends of the two U-shaped grooves (512) extend outward along the axis of the input shaft (21) and are connected to the mounting portions (10). The rotating shaft assembly (2) further comprises an intermediate shaft (22) for mounting the intermediate gear set (32), the mounting portions (10) comprise a first mounting groove (101) for mounting the input shaft (21), a second mounting groove (102) for mounting the intermediate shaft (22), and an oil guiding groove (103) formed by the outward recess of the inner wall of the shell assembly (1) and connected to the first mounting groove (101) and the second mounting groove (102), wherein the free ends of the U-shaped grooves (512) are inserted into the oil guiding groove (103). The oil guiding groove (103) comprises a main groove body (1031) connected to the U-shaped grooves (512), a first branch groove (1032) located below the main groove body (1031) and connected to the main groove body (1031) and the first mounting groove (101), and a second branch groove (1033) located above the main groove body (1031) and connected to the main groove body (1031) and the second mounting groove (102).

2. The reducer assembly of claim 1, wherein, ​ ​ ​ ​ 3. The reducer assembly of claim 2, wherein, ​ 4. The reducer assembly of claim 2, wherein, ​ 5. The reducer assembly of claim 4, wherein, ​ ​ ​ ​ 6. The reducer assembly of claim 5, wherein, ​ ​ ​ A second branch groove (1033) is located below the main groove body (1031) and is communicated with the main groove body (1031) and the second mounting groove (102).

7. The reducer assembly of claim 2, wherein, The projection of the conveying groove (513) in the horizontal direction is L-shaped, and the liquid containing groove (511), the conveying groove (513), and the corresponding U-shaped groove (512) surround to form an avoiding hole (514).

8. The reducer assembly of claim 1, wherein, The second oil guide assembly (52) comprises: An L-shaped plate (521) whose horizontal section is above the output gear (33) and whose vertical section extends towards the differential (4); An ear plate (522) connected to the vertical section of the L-shaped plate (521) at one end and extending towards the output gear (33) at the other end.

9. The reducer assembly of claim 1, wherein, The shell assembly (1) comprises a shell (11) and an end cover (12), the shell (11) and the end cover (12) are connected and surround to form a cavity, the shell (11) and the end cover (12) are respectively provided with the mounting part (10) for mounting the rotating shaft assembly (2), the shell (11) and the end cover (12) are respectively provided with a threaded column (13) for mounting the first oil guide assembly (51), and the first oil guide assembly (51) is screw-connected to the threaded column (13).

10. A rear axle assembly characterized by, Comprise: The speed reducer assembly of any one of claims 1-9; An axle housing (6) comprising an axle housing cover (61), the differential (4) and the output gear (33) are inserted into the axle housing cover (61), and the second oil guide assembly (52) is connected to the inner wall of the axle housing cover (61).

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