Retarder assembly and vehicle

Abstract

The application relates to the technical field of reducers, and particularly discloses a reducer assembly and a vehicle, which comprises a reducer shell, a differential mechanism, a transition shaft and a sealing mechanism; the differential mechanism is arranged in the reducer shell, and the differential mechanism comprises a differential outlet; the transition shaft is installed on the differential outlet, and the transition shaft is provided with a connecting blind hole for fixing a vehicle half shaft; the sealing mechanism is in interference fit with the outer periphery of the transition shaft, and the sealing mechanism is sealingly abutted against the reducer shell. Through cooperation of the sealing mechanism, the transition shaft and the reducer shell, the sealing performance of the reducer assembly is improved, the oil leakage problem is improved or avoided, and meanwhile, external contaminants can be improved or prevented from entering the reducer assembly.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, specifically to a speed reducer assembly and a vehicle. Background Technology

[0002] The reducer assembly is a component that enables speed reduction and torque increase, differential speed between wheels, and changes in the direction of power transmission. Currently, the output shaft end of the reducer assembly, i.e., the differential outlet, mostly uses an oil seal that mates with the vehicle's half-shaft to form a seal and prevent lubricating oil leakage.

[0003] However, without the half-shafts of the vehicle assembled, the reducer assembly has low sealing performance and problems such as oil leakage. Utility Model Content

[0004] This application provides a speed reducer assembly and a vehicle, which can improve sealing performance and improve or avoid oil leakage problems by setting a sealing mechanism.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a reducer assembly, which includes a reducer housing, a differential mechanism, a transition shaft, and a sealing mechanism; the differential mechanism is disposed in the reducer housing and includes a differential outlet; the transition shaft is installed at the differential outlet and has a blind hole for fixing the vehicle half shaft; the sealing mechanism is interference-fitted onto the outer periphery of the transition shaft and the sealing mechanism seals against the reducer housing.

[0006] The sealing mechanism includes an oil seal and a felt. The oil seal has a first through hole, and the felt has a second through hole. The first through hole and the second through hole are coaxially arranged, and the diameter of the second through hole is smaller than that of the first through hole. The transition shaft is installed in the first through hole and the second through hole. Along the direction from the inside to the outside of the reducer housing, the oil seal and the felt are sequentially sleeved on the transition shaft.

[0007] The first through hole includes two sub-through holes and a second sub-through hole with different diameters. The first sub-through hole and the second sub-through hole are connected and together form a stepped hole. There is a stepped stage between the first sub-through hole and the second sub-through hole. The felt is placed in the second sub-through hole and abuts against the stepped stage. The diameter of the second through hole is smaller than the diameter of the first sub-through hole, and the diameter of the first sub-through hole is smaller than the diameter of the second sub-through hole.

[0008] The inner wall of the first sub-through hole is provided with a sealing lip, which is interference-fitted with the transition shaft. The orthographic projection of the end of the sealing lip away from the inner wall of the first sub-through hole is projected onto the felt.

[0009] The oil seal includes a stepped first section and a stepped second section, which are connected by a stepped structure. The first section is fitted onto the transition shaft, and the second section abuts against the reducer housing.

[0010] The second section has protruding teeth on its outer periphery, and the reducer housing has grooves. The teeth are embedded in the grooves and abut against the inner wall of the grooves.

[0011] The second section has a flange at its tail end, away from the sealing lip, and the flange abuts against the end of the reducer housing.

[0012] The reducer assembly also includes a dust cover, which has a third through hole. The dust cover is fitted onto the outer periphery of the transition shaft through the third through hole, and the dust cover is located inside the second sub-through hole. The stage also has a side lip, which extends toward the dust cover and is interference-fitted with the dust cover.

[0013] The reducer assembly also includes a disengagement mechanism and a bushing. The disengagement mechanism is connected to one of the outlets of the differential mechanism. The transition shaft includes a disengagement transition shaft fixedly connected to the disengagement mechanism. The bushing is sleeved on the outer periphery of the disengagement transition shaft, and the sealing mechanism is interference-fitted on the outer periphery of the bushing.

[0014] This application also includes a second technical solution, providing a vehicle including the aforementioned reducer assembly.

[0015] The beneficial effects of this application are as follows: Unlike existing technologies, the reducer assembly and vehicle provided in this application include a reducer housing, a differential mechanism, a transition shaft, and a sealing mechanism. The differential mechanism is housed within the reducer housing and includes a differential outlet. The transition shaft is installed at the differential outlet and has a blind connection hole for connecting an external vehicle half-shaft. The sealing mechanism is interference-fitted onto the outer circumference of the transition shaft and abuts against the reducer housing. Through the cooperation of the sealing mechanism with the transition shaft and the reducer housing, the sealing performance of the reducer assembly is improved, reducing or preventing oil leakage. Simultaneously, it also reduces or prevents external contaminants from entering the reducer assembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a structural schematic diagram of an embodiment of the reducer assembly of this application, wherein the reducer assembly includes a sealing mechanism; Figure 2 yes Figure 1 A magnified structural diagram of part A in the middle; Figure 3 yes Figure 1 Schematic diagram of the middle sealing mechanism; Figure 4 yes Figure 1 A magnified schematic diagram of part B in the middle.

[0017] Reference numerals: 1. Reducer housing; 11. Groove; 2. Differential mechanism; 3. Transition shaft; 31. Disengagement transition shaft; 4. Sealing mechanism; 41. Oil seal; 411. First through hole; 4111. First sub-through hole; 4112. Second sub-through hole; 412. Sealing lip; 4121. Main lip; 4122. Secondary lip; 413. First section; 414. Second section; 415. Stage; 42. Felt; 421. Second through hole; 416. Gear; 417. Flange; 5. Dust cover; 51. Third through hole; 418. Side lip; 6. Disengagement mechanism; 7. Bushing; 100. Reducer assembly. Detailed Implementation

[0018] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] Please refer to the reference. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of an embodiment of the reducer assembly provided in this application. Figure 2 yes Figure 1 A magnified structural diagram of part A in the diagram. One aspect of this application provides a reducer assembly 100, which includes a reducer housing 1, a differential mechanism 2, a transition shaft 3, and a sealing mechanism 4. The differential mechanism 2 is disposed within the reducer housing 1 and includes a differential outlet. The transition shaft 3 is mounted at the differential outlet and has a blind hole for fixing a vehicle half-shaft. The sealing mechanism 4 is interference-fitted onto the outer periphery of the transition shaft 3 and abuts against the reducer housing 1. Through the cooperation of the sealing mechanism 4 with the transition shaft 3 and the reducer housing 1, the sealing performance of the reducer assembly 100 is improved, reducing or preventing oil leakage. Simultaneously, it can also improve or prevent external contaminants from entering the reducer assembly 100.

[0023] Specifically, the transition shaft 3 can be designed as a non-hollow shaft with blind holes at its ends for fixing the vehicle half-shaft, facilitating subsequent assembly of the vehicle half-shaft. The cooperation between the sealing mechanism 4, the transition shaft 3, and the reducer housing 1 allows the reducer assembly 100 to form an independent sealed environment, improving sealing performance. Simultaneously, it also enables the reducer assembly 100 to store lubricating oil, allowing it to be supplied with oil at the factory, reducing the need for lubricating oil filling during vehicle assembly.

[0024] Please continue to refer to Figure 3 , Figure 3 yes Figure 1A schematic diagram of the sealing mechanism. In one embodiment of this application, the sealing mechanism 4 includes an oil seal 41 and a felt 42. The oil seal 41 has a first through hole 411, and the felt 42 has a second through hole 421. The first through hole 411 and the second through hole 421 are coaxially arranged, and the diameter of the second through hole 421 is smaller than the diameter of the first through hole 411. The transition shaft 3 is installed in the first through hole 411 and the second through hole 421. Along the direction from the inside to the outside of the reducer housing 1, the oil seal 41 and the felt 42 are sequentially sleeved on the transition shaft 3.

[0025] Specifically, the oil seal 41 has a central through hole as the first through hole 411, and the felt 42 has a central through hole as the second through hole 421. The transition shaft 3 is installed in the first through hole 411 and the second through hole 421. The oil seal 41 and the felt 42 are sequentially fitted onto the transition shaft 3, that is, the oil seal 41 is first fitted onto the outer circumference of the transition shaft 3, and then the felt 42 is fitted onto the outer circumference of the transition shaft 3. The oil seal 41 forms an interference fit with the outer circumference of the transition shaft 3 through the first through hole 411, which can improve or prevent lubricating oil leakage. The felt 42 can abut against the oil seal 41 and is located relatively close to the outer side. It forms an interference fit with the outer circumference of the transition shaft 3 through the second through hole 421, which can enhance the ability to block external contaminants. The oil seal 41 can be made of rubber material to improve elastic sealing performance, and the felt 42 can be made of fiber felt material to improve anti-fouling efficiency. Figure 2 As shown, the oil seal 41 and the felt 42 work together to form a multi-layered sealing barrier. The outer side of the felt 42 is designed to preferentially intercept mud, moisture, and dust, preventing contaminants from entering the oil seal 41 and causing it to fail. The transition shaft 3 is installed in the first through hole 411 and the second through hole 421. The oil seal 41 and the felt 42 are sequentially fitted onto the transition shaft 3, with the felt 42 first fitted onto the outer circumference of the transition shaft 3, and then the oil seal 41 fitted onto the outer circumference of the felt 42.

[0026] Furthermore, the interference fit design of the oil seal 41 and felt 42 allows the reducer assembly 100 to form an independent sealed environment even before the vehicle half-shaft is assembled, ensuring stable storage of internal lubricating oil. This reduces the need for additional lubrication during assembly by vehicle customers, simplifying the production process. Moreover, the transition shaft 3, used as a replacement component, mitigates or eliminates the risk of scratches from direct contact between the vehicle half-shaft and the oil seal 41, reducing the incidence of after-sales oil leaks and improving the sealing reliability and service life of the reducer assembly 100. This provides a more efficient sealing solution for vehicle manufacturing.

[0027] Furthermore, such as Figure 3As shown, the first through hole 411 and the second through hole 421 are coaxially arranged, and the diameter of the second through hole 421 is smaller than that of the first through hole 411. This allows the felt 42 to undergo elastic compression when it is interference-fitted with the transition shaft 3, enhancing its anti-fouling ability and reducing the risk of contaminants entering the oil seal 41 area through gaps, thus improving the sealing performance of the reducer assembly 100. Simultaneously, the larger diameter of the first through hole 411 of the oil seal 41 facilitates the assembly and disassembly of the oil seal 41, improving production efficiency. Furthermore, it prevents the vehicle half-shaft from contacting the lip of the oil seal 41 during half-shaft assembly, eliminating after-sales oil leakage problems caused by scratches, and ensuring a reliable sealing environment for the reducer assembly 100 to ship with lubricating oil.

[0028] In one embodiment of this application, the first through hole 411 includes two sub-through holes 4111 and 4112 with different diameters. The first sub-through hole 4111 and the second sub-through hole 4112 are connected and together form a stepped hole. There is a step 415 between the first sub-through hole 4111 and the second sub-through hole 4112. The felt 42 is disposed in the second sub-through hole 4112 and abuts against the step 415. The diameter of the second through hole 421 is smaller than the diameter of the first sub-through hole 4111, and the diameter of the first sub-through hole 4111 is smaller than the diameter of the second sub-through hole 4112.

[0029] Specifically, the first through-hole 411 consists of two sub-through-holes with different diameters. The first sub-through-hole 4111 has a smaller diameter, while the second sub-through-hole 4112 has a larger diameter. The two sections are connected to form a stepped hole, and a stepped stage 415 is provided between the first sub-through-hole 4111 and the second sub-through-hole 4112. The felt 42 is placed inside the second sub-through-hole 4112 and abuts against the stepped stage 415 to improve the stability of the felt 42 in the sealing area. The stepped hole design allows the felt 42 to remain stable under vibration or load conditions, improving or preventing seal failure due to displacement. Moreover, the felt 42 abutting against the stepped stage 415 forms a tight contact surface, which can prevent external contaminants such as mud, moisture, and dust from entering the oil seal 41 area.

[0030] Furthermore, the increasing diameters of the second through hole 421, the first sub-through hole 4111, and the second sub-through hole 4112 allow the felt 42 to tightly wrap around the transition shaft 3, providing a reliable dust and water barrier. This prevents external mud, water, and dust from entering the oil seal 41, avoiding failure of the oil seal 41 due to contaminant intrusion, and significantly reducing the risk of oil leakage from the reducer. At the same time, the stable positioning of the felt 42 enhances the overall reliability of the sealing system, improves the sealing performance of the reducer when the half-shaft of the vehicle is not assembled, increases the feasibility of shipping with lubricating oil, reduces after-sales oil leakage problems, and extends the product's service life.

[0031] In one embodiment of this application, a sealing lip 412 protrudes from the inner wall of the first sub-through hole 4111 near the transition shaft 3. The sealing lip 412 is press-fitted with the transition shaft 3. Figure 2 and Figure 3 As shown, the orthographic projection of the end of the sealing lip 412 away from the inner wall of the first sub-through hole 4111 is projected onto the felt 42.

[0032] Specifically, the sealing lip 412 protrudes relative to the inner wall of the first sub-through hole 4111 to abut against the transition shaft 3 and form an interference fit, creating a reliable sealing structure and improving sealing performance. By projecting the end of the sealing lip 412 away from the inner wall of the first sub-through hole 4111 onto the felt 42, the diameter of the first sub-through hole 4111 is larger than the diameter of the second through hole 421. This avoids compression interference of the sealing lip 412 on the felt 42 during assembly, allowing the felt 42 to completely cover the surface of the transition shaft 3 and perform its anti-fouling function. This enhances the ability to prevent external contaminants such as mud, water, and particles from entering the oil seal 41, preventing contamination of the sealing lip 412 and thus sealing failure. Simultaneously, the interference fit between the sealing lip 412 and the transition shaft 3 enhances the overall sealing reliability, allowing the reducer assembly 100 to maintain an independent sealing environment even before the vehicle half-shaft is assembled. This enables lubrication-enabled supply, reducing the need for lubrication during vehicle assembly for customers.

[0033] Furthermore, the sealing lip 412 may include a main lip 4121 and a secondary lip 4122 spaced apart. The secondary lip 4122 is closer to the felt 42 than the main lip 4121. It is tightly connected to the transition shaft 3 through the main lip 4121 and the secondary lip 4122. A sealing area can be formed between the main lip 4121 and the secondary lip 4122, which further improves the sealing performance and reliability, thereby preventing the lubricating oil inside the reducer assembly 100 from flowing out, and also preventing external contaminants from entering the reducer assembly 100.

[0034] In one embodiment of this application, the oil seal 41 includes a stepped first section 413 and a stepped second section 414, which are connected by a stepped section 415; the first section 413 is sleeved on the transition shaft 3, and the second section 414 abuts against the reducer housing 1.

[0035] Specifically, the oil seal 41 adopts a stepped structure design, comprising a first section 413 and a second section 414. The two sections are connected and transitioned through a step 415. This stepped structure design reduces stress concentration and improves the structural strength and stability of the oil seal 41. The first section 413 may have a first sub-through hole 4111 with a smaller diameter, and the second section 414 may have a second sub-through hole 4112 with a larger diameter, so that the two sub-through holes can connect and fit together to form a stepped hole. The first section 413 is interference-fitted onto the transition shaft 3, which can improve or prevent the oil seal 41 from sliding axially. The second section 414 directly contacts the reducer housing 1 to form a fixed structure, enhancing the axial fixing force and improving or preventing the oil seal 41 from loosening or falling off during the operation of the reducer assembly 100.

[0036] In one embodiment of this application, the outer periphery of the second segment 414 is provided with protruding teeth 416, and the reducer housing 1 is provided with a groove 11, the teeth 416 being embedded in the groove 11 and abutting against the inner wall of the groove 11.

[0037] Specifically, the outer circumference of the outer ring of the oil seal 41 is provided with raised teeth 416, which can be annular structures for engaging with the corresponding groove 11 of the reducer housing 1. The reducer housing 1 has a groove 11 at the oil seal 41 mounting position, and the shape of the groove 11 can match the teeth 416, so that the teeth 416 can tightly abut against the inner wall of the groove 11 after being inserted. The structural design of the teeth 416 being inserted into the groove 11 and abutting against the inner wall enhances the pull-out force of the oil seal 41, which can prevent the oil seal 41 from falling out during the operation of the reducer assembly 100 due to vibration, pressure fluctuations or assembly stress, thereby improving or avoiding the problem of lubricating oil leakage caused by the oil seal 41 falling out.

[0038] Furthermore, this design enhances the durability of the sealed environment through a mechanical locking mechanism, improves the sealing reliability of the reducer, extends its service life, and reduces maintenance costs caused by damage to the oil seal 41 during vehicle assembly.

[0039] Furthermore, in another embodiment, the groove 11 may not be designed according to the shape of the tooth 416. For example, it may be designed as a hook-shaped groove 11, which uses the hook-shaped sidewall to hold the tooth 416 in place to limit the displacement of the oil seal 41.

[0040] In one embodiment of this application, a flange 417 is provided at the tail end of the second segment 414 away from the sealing lip 412, and the flange 417 abuts against the end of the reducer housing 1.

[0041] Specifically, flange 417 can be a flange-shaped design for tight contact with the end of reducer housing 1. In one embodiment, the flange 417 face can be fitted with the corresponding end of reducer housing 1 into the groove 11 to enhance the fixing effect. In another embodiment, the flange 417 face can also directly abut the end of reducer housing 1, so that the sealing mechanism 4 maintains a stable position during operation. The tight abutment between flange 417 and the end of reducer housing 1 further enhances the pull-out force of oil seal 41, improving or preventing oil seal 41 from coming off due to vibration or internal pressure changes during the operation of reducer assembly 100, thereby maintaining the integrity of the sealing system and avoiding the risk of lubricating oil leakage. At the same time, the flange 417 abutment design also simplifies the installation and disassembly process of oil seal 41 and improves assembly efficiency.

[0042] In one embodiment of this application, the reducer assembly 100 further includes a dust cover 5, which has a third through hole 51. The dust cover 5 is sleeved on the outer periphery of the transition shaft 3 through the third through hole 51, and the dust cover 5 is located in the second sub-through hole 4112. The stage 415 also has a side lip 418, which extends toward the dust cover 5 and is interference-fitted with the dust cover 5.

[0043] Specifically, the dust cover 5 is provided with a third through hole 51 for fitting the transition shaft 3. The dust cover 5 is tightly fitted onto the outer periphery of the transition shaft 3 through the third through hole 51 and is located within the second sub-through hole 4112. The stage 415 is provided with a side lip 418, which extends towards the dust cover 5 and forms an interference fit with the dust cover 5. The interference fit between the dust cover 5 and the side lip 418 can prevent external contaminants such as mud and water from entering the sealing area, thereby improving the sealing performance.

[0044] Furthermore, the dust cover 5 is located inside the second sub-through hole 4112, and the displacement of the dust cover 5 can be restricted by the inner wall of the second sub-through hole 4112, thereby improving or reducing the risk of the dust cover 5 falling off and further enhancing the stability of the structure and the reliability of the seal.

[0045] Please continue to combine Figure 1 and Figure 4 , Figure 4 yes Figure 1 The enlarged structural diagram of part B in the middle. In one embodiment of this application, the reducer assembly 100 further includes a disengagement mechanism 6 and a bushing 7. The disengagement mechanism 6 is connected to one of the outlets of the differential mechanism 2; the transition shaft 3 includes a disengagement transition shaft 31 fixedly connected to the disengagement mechanism 6; the bushing 7 is sleeved on the outer periphery of the disengagement transition shaft 31, and the sealing mechanism 4 is interference-fitted on the outer periphery of the bushing 7.

[0046] Specifically, the disengagement mechanism 6 connects the transition shaft 3 to the differential outlet, allowing for temporary fixation during the assembly or testing phase of the reducer assembly 100, while enabling rapid disengagement when needed, such as for sealing tests on the production line. A bushing 7, fitted around the outer periphery of the transition shaft 3, can be made of metal such as a steel bushing, providing a stable reference surface for the installation of the sealing mechanism 4 and preventing direct contact between the surface of the transition shaft 3 and the sealing mechanism 4, thus preventing wear. The disengagement transition shaft 31 connects the disengagement mechanism 6 to other components of the vehicle. Due to space constraints—the size of the disengagement transition shaft 31 is smaller than the size of the transition shaft 3 on one side of the differential mechanism 2—a bushing 7 is fitted around the outer periphery of the disengagement transition shaft 31 to increase its size. This allows the sealing mechanism 4 to cooperate effectively with the disengagement transition shaft 31 and the reducer housing 1, forming a stable and reliable sealing environment. By designing the bushing 7, the same type of oil seal 41 can be used for sealing on the disengagement mechanism 6 and the differential mechanism 2, reducing shaft development costs and thus reducing material control costs.

[0047] In this embodiment of the reducer assembly 100, both the transition shaft 3 on the differential structure side and the disengagement transition shaft 31 on the disengagement mechanism 6 side can be non-hollow shafts. Together with the oil seal 41 of the same type described above, they form an independent sealing system, thereby preventing internal oil leakage. This allows for factory-supplied oil, reducing the need for lubrication during vehicle assembly. Since the vehicle half-shaft does not mate with the oil seal 41 during vehicle assembly but directly connects to the transition shaft 3, the risk of scratching the oil seal 41 by the vehicle half-shaft is eliminated.

[0048] In another aspect, this application also provides a vehicle that includes the aforementioned reducer assembly 100. Specifically, since the vehicle includes the reducer assembly 100 described in the above embodiments, it also has the beneficial effects of the aforementioned reducer assembly 100, which will not be elaborated further here.

[0049] It should be noted that the terms "horizontal" and "vertical" do not imply that the components must be absolutely horizontal or vertical, but rather that they can be slightly tilted. Similarly, the terms "parallel" and "perpendicular" do not imply that the components are absolutely parallel or perpendicular, but rather that they can have a certain angular deviation. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted. In addition, the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships that are commonly used when the product of this application is in use. They are only for the purpose of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] It is understood that the term "multiple" in this document means at least two, such as two, three, etc., unless otherwise specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices. The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0051] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A speed reducer assembly, characterized in that, include: Reducer housing (1); Differential mechanism (2), the differential mechanism (2) is disposed in the reducer housing (1), the differential mechanism (2) includes a differential outlet; Transition shaft (3), the transition shaft (3) is installed at the differential outlet, the transition shaft (3) is provided with a connecting blind hole for fixing the vehicle half shaft; The sealing mechanism (4) is interference-fitted onto the outer periphery of the transition shaft (3) and the sealing mechanism (4) seals against the reducer housing (1).

2. The reducer assembly according to claim 1, characterized in that, The sealing mechanism (4) includes an oil seal (41) and a felt (42). The oil seal (41) is provided with a first through hole (411), and the felt (42) is provided with a second through hole (421). The first through hole (411) and the second through hole (421) are coaxially arranged, and the diameter of the second through hole (421) is smaller than the diameter of the first through hole (411); The transition shaft (3) is installed in the first through hole (411) and the second through hole (421). Along the direction from the inside to the outside of the reducer housing (1), the oil seal (41) and the felt (42) are sequentially sleeved on the transition shaft (3).

3. The reducer assembly according to claim 2, characterized in that, The first through hole (411) includes two sub-through holes (4111) and a second sub-through hole (4112) with different diameters. The first sub-through hole (4111) and the second sub-through hole (4112) are connected and together form a stepped hole. There is a step (415) between the first sub-through hole (4111) and the second sub-through hole (4112). The felt (42) is disposed in the second sub-through hole (4112) and abuts against the step (415). The diameter of the second through hole (421) is smaller than the diameter of the first sub-through hole (4111), and the diameter of the first sub-through hole (4111) is smaller than the diameter of the second sub-through hole (4112).

4. The reducer assembly according to claim 3, characterized in that, The inner wall of the first sub-through hole (4111) is provided with a sealing lip (412), the sealing lip (412) is press-fitted with the transition shaft (3), and the orthographic projection of the end of the sealing lip (412) away from the inner wall of the first sub-through hole (4111) is projected onto the felt (42).

5. The reducer assembly according to claim 4, characterized in that, The oil seal (41) includes a stepped first section (413) and a stepped second section (414), which are connected by the stepped section (415). The first segment (413) is sleeved on the transition shaft (3), and the second segment (414) abuts against the reducer housing (1).

6. The reducer assembly according to claim 5, characterized in that, The second segment (414) has protruding teeth (416) on its outer periphery, and the reducer housing (1) has a groove (11). The teeth (416) are embedded in the groove (11) and abut against the inner wall of the groove (11).

7. The reducer assembly according to claim 5, characterized in that, The second segment (414) has a flange (417) at its tail end away from the sealing lip (412), which abuts against the end of the reducer housing (1).

8. The reducer assembly according to claim 5, characterized in that, The reducer assembly also includes a dust cover (5), which has a third through hole (51). The dust cover (5) is sleeved on the outer periphery of the transition shaft (3) through the third through hole (51), and the dust cover (5) is located inside the second sub-through hole (4112). The stage (415) is also provided with a side lip (418), which extends toward the dust cover (5) and is interference-fitted with the dust cover (5).

9. The reducer assembly according to any one of claims 1-8, characterized in that, The reducer assembly also includes a disengagement mechanism (6) and a bushing (7), the disengagement mechanism (6) being connected to one of the outlets of the differential mechanism (2); The transition shaft (3) includes a disengagement transition shaft (31) fixedly connected to the disengagement mechanism (6); The bushing (7) is fitted around the outer periphery of the disengagement transition shaft (31), and the sealing mechanism (4) is fitted around the outer periphery of the bushing (7) with an interference fit.

10. A vehicle, characterized in that, include: The reducer assembly according to any one of claims 1-9.

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