Sealing assembly and vehicle

Abstract

The application provides a sealing assembly and a vehicle. The sealing assembly comprises a sealing ring and a gasket, the gasket is sleeved on the radial outer side of the sealing ring; the sealing ring has a first inner side wall and a first outer side wall, the gasket has a second inner side wall and a second outer side wall, the first outer side wall is in close contact with the second inner side wall, and the material of the gasket is a hard material. The sealing assembly is simple and convenient to install, and has better sealing reliability.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a sealing assembly and a vehicle. Background Technology

[0002] Currently, new energy vehicles are developing rapidly, but noise, vibration, and harshness (NVH) are among the most prominent issues they face. As users pay increasing attention to vehicle comfort, NVH has become a key technical problem restricting the development of new energy vehicles. Besides the common electric drive whistling problem, NVH issues also include various types of electric drive vibration and abnormal noises under different operating conditions. Electric drive vibration and abnormal noise problems are often more complex, and the foundation of electric drive assembly integration lies in the integration of the motor and the reducer.

[0003] In pure electric drive mode, new energy vehicles do not engage the engine; only the electric drive assembly provides power. When accelerating or braking suddenly, the vehicle emits a noticeable jolt. Additionally, at low speeds, abnormal noises and vibrations may occur. These vibrations and noises primarily stem from gaps in the transmission system of the electric drive assembly, causing the noises. These gaps mainly exist in the axial direction of the electric drive assembly's motor and reducer. Therefore, resolving the axial gap issue between the electric drive assembly's motor and reducer is crucial for solving the abnormal noises, especially addressing axial gaps caused by loose bearings in the assembly components.

[0004] Existing technologies typically employ high-speed seals between the motor and reducer in electric drive assemblies. However, these seals require highly precise installation. Whether mounted on the motor housing or the corresponding reducer housing, the housing mounting hole dimensions are complex, making high-precision machining difficult and costly. Furthermore, the housing's overall structure is complex, integrating numerous parts, making it prone to deformation under dynamic loads. Even small deformations can affect the positioning accuracy of the high-speed seal, leading to premature wear and failure. Summary of the Invention

[0005] This application provides a sealing assembly and a vehicle. The sealing assembly provided by this application is simple and convenient to install, and offers better sealing reliability.

[0006] This application discloses a sealing assembly, including a sealing ring and a gasket, wherein the gasket is sleeved on the radial outer side of the sealing ring; the sealing ring has a first inner sidewall and a first outer sidewall, and the gasket has a second inner sidewall and a second outer sidewall, wherein the first outer sidewall and the second inner sidewall are in contact, and the gasket is made of a rigid material.

[0007] In one possible implementation, the side of the gasket opposite to the sealing ring has an uneven surface.

[0008] As one possible implementation, the radial thickness of the gasket is greater than or equal to the radial thickness of the seal.

[0009] In one possible implementation, the gasket is a metal component; the sealing ring is a rubber component, or the sealing ring includes a rubber layer and a metal layer, with the metal layer sleeved on the radially outer side of the rubber layer.

[0010] In one possible implementation, the first outer wall of the sealing ring is detachably connected to the second inner wall of the gasket.

[0011] In one possible implementation, the sealing ring and the gasket are pressed together, and the wall surface of the second inner sidewall is rough.

[0012] Secondly, this application provides a vehicle including an electric drive assembly and the aforementioned sealing assembly; the electric drive assembly includes a housing, a motor, and a reducer, the motor and reducer being disposed within the housing and cooperating with each other; the motor includes a shaft and a first bearing, the reducer includes a second bearing, both the first and second bearings are sleeved on the shaft, and the second bearing is disposed at the end of the reducer facing the first bearing, the first and second bearings being disposed opposite each other; the sealing assembly is sleeved on the shaft and fills the space between the first and second bearings.

[0013] In one possible implementation, the second outer wall of the gasket is configured to transition fit with the inner wall of the housing.

[0014] In one possible implementation, the thickness of the gasket along the axial direction of the shaft is greater than or equal to the thickness of the sealing ring; the gasket includes a first end face and a second end face, the first end face abutting against the first bearing, and the second end face abutting against the second bearing.

[0015] As one possible implementation, corresponding to the electric drive assembly of different vehicles, the thickness of the gasket of the sealing assembly along the shaft axis is matched with the clearance tolerance between the first bearing and the second bearing of the electric drive assembly; different sealing assemblies corresponding to gaskets of different thicknesses form a series of sealing assemblies.

[0016] This application provides a sealing assembly and a vehicle. The sealing assembly includes a sealing ring and a gasket, with the gasket fitted radially outward of the sealing ring. The sealing ring has a first inner sidewall and a first outer sidewall, and the gasket has a second inner sidewall and a second outer sidewall. The first outer sidewall and the second inner sidewall are fitted together, and the gasket is made of a rigid material. The sealing assembly provided by this application is simple and convenient to install, and offers better sealing reliability.

[0017] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that the sealing components and vehicles provided by this application can solve, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic cross-sectional view of the sealing assembly provided in Embodiment 1 of this application when it is fitted onto the motor shaft.

[0020] Figure 2 This is a cross-sectional view of the interior of the electric drive assembly of the vehicle provided in Embodiment 2 of this application;

[0021] Figure 3 NVH (Noise, Vibration, and Harshness) energy diagram for vehicles with electric drive assemblies using bearing circlip positioning in existing technologies;

[0022] Figure 4 This is an NVH (noise, vibration, and harshness) energy diagram of a vehicle provided in Embodiment 3 of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100 - Sealing assembly; 110 - Sealing ring; 111 - First inner wall; 112 - First outer wall; 120 - Washer; 121 - Second inner wall; 122 - Second outer wall; 123 - First end face; 124 - Second end face;

[0025] 11-Electric drive assembly; 101-Housing; 102-Motor; 1021-Shaft; 1022-First bearing; 103-Reducer; 1031-Second bearing. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0027] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0028] Secondly, it should be noted that in the description of this application, the terms "inner" and "outer," etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0029] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" 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 or an electrical connection; they can refer to the internal connection 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.

[0030] It should be noted that, in this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. The terms "above," "below," etc., are used to describe the relative positional relationship of the various structures in the accompanying drawings, solely for clarity of description, and are not intended to limit the scope of the invention. Changes or adjustments to these relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0031] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] Currently, in pure electric mode, the electric drive assembly of new energy vehicles is prone to vibration and abnormal noise. This vibration and noise problem is mainly due to loosely fixed bearings in the motor and reducer of the electric drive assembly, resulting in axial movement and clearance in the bearings. To solve this problem, the current solutions mainly include the following three:

[0033] Firstly, the bearing is heat-fitted into the motor housing and reducer housing for complete fixation. The heat-fitting method involves heating the bearing to approximately 100°C, using either an oil pan or a dedicated electromagnetic bearing heater. Once the temperature is reached, the bearing's inner bore expands, allowing it to be directly fitted onto the shaft. However, this heat-fitting process is cumbersome during the electric drive assembly assembly, resulting in a slow production cycle. Furthermore, excessive interference fit can deform the motor or reducer housing, affecting other performance aspects. The heat-fitting process also struggles to withstand dynamic forces of tens of thousands of Newtons during abnormal noise while maintaining stability. Disassembly using the heat-fitting method is also difficult, preventing the product from being reused.

[0034] Secondly, the bearing retainer ring is used to fix the axial position of the bearing. In this solution, the retainer ring itself needs clearance to be axially fixed. Under the action of electric drive response of new energy vehicles, which can reach tens of thousands of Newtons, even the smallest clearance will cause impact and abnormal noise. As the usage time increases, the clearance of the transmission system becomes larger and larger, the wear of parts becomes more and more serious, and the abnormal noise of the retainer ring solution becomes louder and louder, which cannot completely solve the problem of abnormal noise.

[0035] Thirdly, a pressure plate and screws are used to press the outer ring of the bearing for axial fixation. In this solution, because it needs to withstand a force of up to tens of thousands of Newtons, the thickness and size of the pressure plate are much larger than those of a retaining spring, occupying much more space in the electric drive assembly. With the increasing functional requirements of new energy vehicles, the miniaturization of the electric drive assembly is becoming increasingly important, making the installation and removal of the pressure plate inconvenient.

[0036] As mentioned above, the most common practice is to fix the motor bearings and reducer bearings separately using axial retaining rings or pressure plates. However, regardless of whether retaining rings or pressure plates are used, axial clearance will still exist on the end faces of the motor bearings and reducer bearings due to insecure fixing, leading to vibration and abnormal noise in the electric drive assembly. Therefore, eliminating the aforementioned clearance to solve the abnormal noise problem has become a key technical challenge.

[0037] Based on the problems existing in the prior art, this application provides a sealing assembly and a vehicle. The sealing assembly provided in this application includes a sealing ring and a gasket, made of a rigid material, sleeved radially outside the sealing ring. It should be noted that traditional seals consist of only one sealing ring. When this type of sealing ring fills the gaps between vehicle components, it has an interference fit with the surrounding structure and is directly subjected to compressive stress, thus making the sealing ring prone to deformation and damage. The sealing assembly provided in this application is a combined type, employing an inner and outer double-layer structure. The outer gasket protects the inner sealing ring, allowing the gasket to directly bear external forces, thereby protecting the sealing ring from deformation. However, the gasket does not need an interference fit with the housing; a slight transition fit is sufficient. This avoids deformation due to interference fitting. Using a rigid material for the gasket enhances its impact resistance and avoids the problem of easy deformation. As an independent and simple structural component, the gasket is easy to manufacture with high precision, thus ensuring the high-precision installation requirements of the high-speed sealing ring.

[0038] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems are described in detail below with specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0039] Figure 1 This is a schematic cross-sectional view of the sealing assembly provided in Embodiment 1 of this application when it is fitted onto the motor shaft. Figure 2 This is a cross-sectional view of the interior of the electric drive assembly of the vehicle provided in Embodiment 2 of this application; Figure 3 NVH (Noise, Vibration, and Harshness) energy diagram for vehicles with electric drive assemblies using bearing circlip positioning in existing technologies;

[0040] Figure 4 This is an NVH (noise, vibration, and harshness) energy diagram of a vehicle provided in Embodiment 3 of this application.

[0041] Example 1

[0042] This application provides a sealing assembly 100, such as Figure 1 As shown, the sealing assembly 100 provided in this application includes a sealing ring 110 and a gasket 120. The gasket 120 is sleeved on the radial outer side of the sealing ring 110. The sealing ring 110 has a first inner sidewall 111 and a first outer sidewall 112. The second sealing ring 110 has a second inner sidewall 121 and a second outer sidewall 122. The first outer sidewall 112 fits against the second inner sidewall 121, and the gasket 120 is made of a hard material.

[0043] In this embodiment, by configuring the sealing assembly 100 as a combination, with the outer gasket 120 fitted radially outside the sealing ring 110, the sealing ring 110 protects the gasket 120, preventing the inner sealing ring 110 from being directly compressed when the sealing assembly 100 is applied to a vehicle. Furthermore, the gasket 120 is made of a rigid material, capable of resisting high external forces and not easily deformed under such conditions, thereby extending the lifespan of the sealing assembly 100 and enhancing its sealing reliability.

[0044] In one possible implementation, the wall surface of the gasket 120 on the side opposite to the sealing ring 110 has an uneven shape.

[0045] Understandably, since the gasket 120 is used to protect the sealing ring 110, when the sealing assembly 100 is installed in the motor housing, the gasket 120 mainly bears the external force. The side of the gasket 120 opposite to the sealing ring 110 is the force-bearing surface of the gasket 120 in contact with other components in the motor housing. This surface is set to an uneven shape. This structure can play a vibration-absorbing role, thereby reducing the damage to the sealing assembly 100 caused by the durability deformation of the housing and extending the service life of the sealing assembly 100.

[0046] Optionally, the radial thickness of the gasket 120 may be greater than or equal to the radial thickness of the sealing ring 110. It is understood that since the thickness of the gasket 120 is not less than the thickness of the sealing ring 110, the gasket 120's ability to withstand external forces can be enhanced, and it can provide better protection for the inner sealing ring 110.

[0047] In one alternative embodiment, the gasket 120 is a metal component; the sealing ring 110 is a rubber component, or the sealing ring includes a rubber layer and a metal layer, with the metal layer sleeved on the radially outer side of the rubber layer.

[0048] Understandably, the sealing ring 110 and the gasket 120 serve similar functions. The purpose of the gasket 120 is twofold: first, to prevent the sealing ring 110 from being directly subjected to force, causing deformation and damage that could affect the sealing effect. However, since the sealing ring 110 is located within the inner ring, it is not directly impacted, allowing for the selection of materials such as rubber, which provides a better sealing effect. Second, the gasket's simple structure allows for independent machining to ensure precision, thus guaranteeing the installation accuracy of the sealing ring.

[0049] It should be noted that the sealing ring 110 includes two structures. The first type can be made directly from rubber, while the second type of sealing ring 110 includes a rubber layer and a metal layer, with the metal layer sleeved on the radial outer side of the rubber layer.

[0050] In fact, the second type of sealing ring 110 mentioned above can be a traditional high-speed sealing ring, which is actually an industry standard part. Generally, a high-speed sealing ring consists of two layers: an inner rubber layer and an outer metal layer. The metal layer protects the inner rubber layer and also helps improve machining accuracy, thus enabling a better fit with the housing. However, because the metal layer is bonded to the rubber, the rubber is prone to deformation, making machining inconvenient. In view of this, this application actually provides a separate metal washer 120 radially outside the traditional high-speed sealing ring. Since this metal washer 120 is a separate structure, it is easier to machine it individually, with higher machining accuracy, and it does not affect the rubber layer. Therefore, it is possible to customize the gap compensation problem and better solve the abnormal noise problem of the electric drive assembly.

[0051] In one embodiment, the first outer sidewall 112 of the sealing ring 110 is detachably connected to the second inner sidewall 121 of the gasket 120, that is, the gasket 120 is detachably fitted onto the first outer sidewall 112 of the sealing ring 110.

[0052] It should be noted that the gasket 120 and the sealing ring 110 are detachable. On the one hand, when the gasket 120 is damaged, only the gasket 120 can be replaced, thus saving costs. On the other hand, the size and thickness of the gasket 120 can be selectively set and replaced as needed, rather than being a uniform standard.

[0053] In another embodiment, the sealing ring 110 and the gasket 120 are pressed together, and the wall surface of the second inner sidewall 121 is rough. For example, when the sealing assembly 100 is installed inside the motor housing, the sealing assembly 100 generally fills the gaps between various components within the motor housing. The sealing assembly 100 achieves the fixation of the sealing ring 110 and the gasket 120 through an interference fit or transition fit with the motor housing, thereby using compressive force without requiring additional fixing methods. By making the second inner sidewall 121 of the gasket 120 a rough surface, the friction between the first outer sidewall 112 of the sealing ring 110 and the second inner sidewall 121 of the gasket 120 can be increased, thereby improving the firmness of the compression fixation of the sealing ring 110 and the gasket 120 and preventing the sealing ring 110 and the gasket 120 from moving relative to each other and separating under external force.

[0054] Example 2

[0055] In this embodiment, this application provides a vehicle that uses the sealing component 100 from Embodiment 1 to fill and seal the gaps between components. On the production line for electric drive assembly assembly, a gasket selection process is first carried out, that is, based on the different tolerances of the measured gaps between the motor bearing and the reducer bearing, a sealing component 100 suitable for the corresponding vehicle is selected from a series of sealing components with different thicknesses, thereby effectively solving the problem of abnormal noise in the drive assembly. The following will describe this solution in detail.

[0056] Currently, most new energy vehicles are driven by electric drive assemblies. The main components of an electric drive assembly generally include a housing, a motor, and a reducer. However, during installation, errors can easily occur when fixing the end faces of the motor and reducer bearings, resulting in axial movement gaps in the bearings. Furthermore, there are generally gaps between the motor / reducer and the housing. These gaps are key factors contributing to abnormal noise in the electric drive assembly. To address these issues, this embodiment uses the sealing component 100 from Embodiment 1 to fill the space between the motor and reducer bearings, thereby positioning the two bearings and preventing vibration that could cause abnormal noise.

[0057] For example, such as Figures 1-2 As shown, the vehicle provided in this embodiment includes an electric drive assembly 11 and the aforementioned sealing assembly 100. The electric drive assembly 11 includes a housing 101, a motor 102, and a reducer 103. The motor 102 and the reducer 103 are disposed within the housing 101 and are configured to cooperate with each other. The motor 102 includes a shaft 1021 and a first bearing 1022. The reducer 103 includes a second bearing 1031. Both the first bearing 1022 and the second bearing 1031 are sleeved on the shaft 1021, and the second bearing 1031 is disposed at the end of the reducer 103 facing the first bearing 1022. The first bearing 1022 and the second bearing 1031 are disposed opposite each other. The sealing assembly 100 is sleeved on the shaft 1021 and fills the space between the first bearing 1022 and the second bearing 1031.

[0058] Specifically, such as Figures 1-2 As shown, the first bearing 1022 is the bearing of the motor 102, and the second bearing 1031 is the bearing of the reducer 103. When the sealing assembly 100 is filled between the first bearing 1022 and the second bearing 1031, the second outer side wall 122 of the washer 120 contacts the housing 101 of the motor 102, and the two end faces of the washer 120 contact the first bearing 1022 and the second bearing 1031 respectively, thereby achieving zero-gap positioning of the washer 120 with the first bearing 1022 and the second bearing 1031.

[0059] For example, the gasket 120 of the sealing assembly 100 can be a traditional high-speed sealing ring. The high-speed sealing ring is installed into the inner ring of the gasket 120 to form a combined sealing assembly 100. The gasket 120 is an independent module with a simple structure and easy strength assurance. The gasket 120 can be processed separately, and the processing accuracy and stability can be easily guaranteed. Therefore, it can be adapted to the width of the gap and the shape of the outer shell 101, making it easier to meet the requirements of installation accuracy.

[0060] Optionally, the second outer wall 122 of the washer 120 is configured to transition fit with the inner wall of the housing 101.

[0061] It should be noted that when the sealing assembly 100 is filled between the first bearing 1022 and the second bearing 1031, the sealing ring 110 is sleeved on the rotating shaft 1021, and the second outer side wall 122 of the washer 120 is in contact with the housing 101 of the electric drive assembly 11. The housing 101 of the electric drive assembly 11 can be a single integral housing 101, or it can include the housing 101 of the motor 102 and the housing 101 of the reducer 103. The function of the housing 101 is to protect the internal structures of the electric drive assembly 11, such as the motor 102 and the reducer 103.

[0062] In a conventional electric drive assembly 11, the radially outer sidewall of the seal is typically interference-fitted with the inner wall of the housing 101 to fill the gap between the two bearings and the housing 101. However, the overall structure of the housing 101 is quite complex, with numerous integrated parts, making it prone to deformation under dynamic loads. Even small deformations can affect the positioning accuracy of the seal, leading to premature wear and failure of the seal.

[0063] The sealing component 100 provided in this embodiment is transitionally fitted with the housing 101 of the electric drive assembly 11, which can, to a certain extent, avoid the problem that the housing 101 can easily cause the seal to deform during dynamic load, extend the service life of the seal, and improve the sealing effect of the seal.

[0064] To further prevent deformation of the seal caused by the force exerted by the housing 101 on the seal during dynamic loading, the second outer side wall 122 of the gasket 120 may be adapted to the contour of the corresponding area of ​​the housing 101. This can avoid the problem of the seal being easily deformed and damaged due to interference fit in some positions caused by shape mismatch, while ensuring a tight fit between the gasket 120 and the inner wall of the housing 101.

[0065] It should be noted that the gasket 120 can transition fit with the housing 101 or adapt to the contour of the housing 101, mainly because the gasket 120 can be individually precision machined. Compared with traditional standard seals, it can be selected and designed as needed to compensate for abnormal noise caused by assembly errors of the electric drive assembly 11.

[0066] In another alternative embodiment, the thickness of the gasket 120 is greater than or equal to the thickness of the sealing ring 110. The gasket 120 includes a first end face 123 and a second end face 124. The first end face 123 abuts against the first bearing 1022, and the second end face 124 abuts against the second bearing 1031.

[0067] It should be noted that when the thickness of the washer 120 along the rotating shaft 1021 is not less than the thickness of the sealing ring 110, the two end faces of the washer 120 will respectively abut against the first bearing 1022 and the second bearing 1031, while there is a gap between the sealing ring 110 and the first bearing 1022 and the second bearing 1031. During dynamic load operation, the washer 120 bears the compressive force of the first bearing 1022 and the second bearing 1031, while the sealing ring 110 bears a smaller compressive force. In addition, the washer 120 also bears the force of the housing. Therefore, the washer 120 provides good protection for the sealing ring 110, preventing the sealing ring 110 from being damaged by direct force, thus providing a double protection effect.

[0068] In one embodiment, corresponding to the electric drive assembly of different vehicles, the thickness of the gasket 120 of the sealing assembly 100 along the axial direction of the shaft 1021 is matched with the clearance tolerance between the first bearing 1022 and the second bearing 1031 of the electric drive assembly 11; the different sealing assemblies 100 corresponding to the gaskets 120 of different thicknesses form a series of sealing assemblies.

[0069] It should be noted that the assembly line includes a series of sealing components 100 with different specifications, such as ten different specifications. The main difference in the specifications of the sealing components 100 lies in the thickness of the gasket 120, while the thickness of the sealing ring 110 is consistent. During the assembly of the reducer and motor, the probe on the production line automatically measures the tolerance of the gap between the first bearing 1022 and the second bearing 1031 in real time using laser scanning. Based on the measured axial gap, a sealing component 100 with a gasket 120 of appropriate thickness is selected and filled into the gap. Finally, the assembly bolts are tightened to connect the motor 102 and the reducer 103, thereby achieving the fixed installation of the motor 102 and the reducer 103 and the gapless positioning of the first bearing 1022 and the second bearing 1031. This greatly eliminates NVH vibration and abnormal noise caused by assembly errors of the electric drive assembly 11.

[0070] It is worth noting that, due to the above-mentioned gasket selection process, each vehicle can select the most suitable sealing component 100, which can compensate for any tolerance gaps and solve the gap compensation problem in a customized manner. Ultimately, multiple existing snap rings or pressure plates can be replaced by a single sealing component 100. The structure is simple, the gap compensation effect is good, and it can better solve the abnormal noise problem of the electric drive assembly 11.

[0071] Furthermore, the integration of the motor 102 and reducer 103 in the electric drive assembly 11 also involves the issue of grease separation. Typically, the connecting components of the motor 102 require grease lubrication, while the reducer 103 requires strict oil lubrication. Therefore, a sealing measure is needed to isolate the motor 102 and reducer 103. A common practice is to use a high-speed sealing ring to prevent oil from the reducer 103 from entering the motor 102. However, the higher the integration, the higher the required speed of the motor 102. When the motor 102 speed exceeds the conventional 16,000 rpm, the installation accuracy requirement is very high; otherwise, the sealing ring will easily wear and leak rapidly. However, high-precision machining of the sealing ring is difficult to achieve, and the sealing ring needs to be interference-fitted with the housing 101. After the assembly of numerous parts and during actual use, the housing 101 is prone to deformation under high and low temperature shocks, affecting the positioning accuracy of the sealing ring and thus easily causing wear failure, thereby affecting the service life of the sealing ring.

[0072] The vehicle provided in this embodiment serves two purposes: firstly, the sealing component 100 fills the space between the bearings of the motor 102 and the reducer 103, thereby positioning the bearings of the motor 102 and the reducer 103; secondly, it isolates the motor 102 and the reducer 103 to prevent lubricating oil from the reducer 103 from entering the motor 102. Therefore, the sealing component 100 of this application can simultaneously solve the problem of abnormal noise in the electric drive assembly 11 and the problem of grease separation and sealing when the motor 102 and the reducer 103 are integrated.

[0073] Furthermore, this application also compares and analyzes the NVH noise of the electric drive assembly 11 of the aforementioned vehicle under bearing retainer positioning and under the positioning of the aforementioned sealing assembly 100. Under the same operating conditions, such as... Figure 3 As shown, the NVH noise of the electric drive assembly 11 under the positioning of the bearing retainer ring resulted in a vibration energy of up to 86.87g measured on the motor 102. Figure 4 As shown, the vibration energy of the NVH abnormal noise measured on the motor 102 under the positioning of the bearing as the sealing component 100 of this application does not exceed 5g. Therefore, the sealing component 100 provided by this application can significantly reduce the abnormal noise of the electric drive assembly 11.

[0074] This application provides a sealing assembly and a vehicle. The sealing assembly provided in this application includes a sealing ring and a gasket, with the gasket sleeved on the radially outer side of the sealing ring; the sealing ring has a first inner sidewall and a first outer sidewall, and the gasket has a second inner sidewall and a second outer sidewall, the first outer sidewall and the second inner sidewall 121 are in contact, and the gasket is made of a rigid material.

[0075] Using the above-mentioned sealing assembly in a vehicle, for example, to fill the gap between the motor bearing and the reducer 103 bearing, has the following effects:

[0076] Firstly, by replacing the retaining rings required for axial positioning of the motor bearing and the reducer bearing with the sealing component of this application, the gap in axial end face positioning of the motor bearing and the reducer bearing is eliminated, thus solving the problem of abnormal noise caused by the gap.

[0077] Secondly, as an independent component, the gasket's machining accuracy is easy to guarantee, meeting high-precision positioning requirements. Gaskets can be measured and selected during production, addressing the differences in actual clearances in each product's transmission system. Because the gasket is positioned by pressing its end face against the bearing end face, the outer ring of the gasket can have a transition or small clearance fit with the housing to avoid the problem of interference fits leading to wear and failure of the sealing components.

[0078] Thirdly, the use of sealing rings and gaskets takes up little space and simultaneously solves the problem of abnormal noise in the electric drive assembly and the sealing problem of grease separation when the motor and reducer are integrated.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing assembly, characterized in that, The device includes a sealing ring and a gasket, wherein the gasket is fitted on the radial outer side of the sealing ring; the sealing ring has a first inner sidewall and a first outer sidewall, and the gasket has a second inner sidewall and a second outer sidewall, wherein the first outer sidewall and the second inner sidewall are in contact with each other, and the gasket is made of a rigid material. The side wall of the gasket opposite to the sealing ring is uneven to absorb vibration. The first outer side wall of the sealing ring is detachably connected to the second inner side wall of the gasket, which facilitates the individual replacement of the gasket; The sealing ring is pressed together with the gasket, and the wall surface of the second inner sidewall is rough to increase the friction between the first outer sidewall and the second inner sidewall. The gasket is a metal part; the sealing ring includes a rubber layer and a metal layer, with the metal layer sleeved on the radial outer side of the rubber layer.

2. The sealing assembly according to claim 1, characterized in that, The radial thickness of the gasket is greater than or equal to the radial thickness of the sealing ring.

3. A vehicle, characterized in that, The device includes an electric drive assembly and a sealing assembly as described in any one of claims 1-2; the electric drive assembly includes a housing, a motor, and a reducer, the motor and the reducer being disposed within the housing and cooperating with each other; the motor includes a shaft and a first bearing, the reducer includes a second bearing, both the first bearing and the second bearing being sleeved on the shaft, and the second bearing being disposed at the end of the reducer facing the first bearing, the first bearing and the second bearing being disposed opposite each other; the sealing assembly is sleeved on the shaft and fills the space between the first bearing and the second bearing.

4. The vehicle according to claim 3, characterized in that, The second outer wall of the gasket is configured to transition fit with the inner wall of the housing.

5. The vehicle according to claim 4, characterized in that, The thickness of the gasket along the axial direction of the rotating shaft is greater than or equal to the thickness of the sealing ring; The washer includes a first end face and a second end face, the first end face abutting against the first bearing, and the second end face abutting against the second bearing.

6. The vehicle according to any one of claims 3-5, characterized in that, For electric drive assemblies of different vehicles, the thickness of the gasket of the corresponding sealing assembly along the shaft axis is matched with the clearance tolerance between the first bearing and the second bearing of the electric drive assembly; The gaskets of different thicknesses correspond to different sealing components, forming a series of sealing components.

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