Sealing assembly for a drive system and drive system

Abstract

The application provides a sealing assembly for a driving system and the driving system, wherein the sealing assembly is annular, is used for sleeving a transmission shaft of the driving system, and comprises a flexible piece and a C-shaped metal piece embedded in the flexible piece. By arranging the sealing assembly, the sealing assembly can block the path of outward leakage of lubricating oil, prevents the lubricating oil in the gearbox from leaking to the outside, meanwhile, the sealing assembly can effectively utilize the existing space between an adapter disc and a speed reducer, does not need to occupy additional space, and does not need to change the design of the gearbox, so that the integration of the IWD system is improved, and the structure is simplified.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a sealing assembly for a drive system and a drive system. Background Technology

[0002] The vehicle's transmission stores lubricating oil, and a seal is required between the transmission and the driveshaft to prevent oil leakage. Due to limited space near the transmission, it is difficult to design a sealing structure between the driveshaft and the transmission, and such a seal typically requires a significant amount of space outside the transmission, which is detrimental to improving system integration. Utility Model Content

[0003] The purpose of this application is to provide a sealing component and a drive system for a drive system, so as to solve the problem in the prior art that it is difficult to design a sealing structure outside the gearbox to prevent lubricating oil leakage in the gearbox.

[0004] In a first aspect, this application provides a sealing assembly for a drive system, wherein the sealing assembly is annular and is used to be sleeved on the drive shaft of the drive system, and the sealing assembly includes a flexible element and a C-shaped metal element embedded in the flexible element.

[0005] In one possible design, the flexible element has a corrugated structure on at least one end face along the axial direction of the drive shaft.

[0006] In one possible design, the metal part has an axial through hole, and at least a portion of the flexible part fills the through hole.

[0007] In one possible design, the metal part has a first end, a second end, and a notch between the first and second ends in the circumferential direction, and at least a portion of the flexible part fills the notch.

[0008] In one possible design, the flexible element is made of rubber.

[0009] Secondly, this application also provides a driving system, comprising:

[0010] case;

[0011] The drive shaft is rotatably connected to the housing;

[0012] The speed reducer is connected to the drive shaft;

[0013] An adapter disc, along the axial direction of the drive shaft, has a first gap between the adapter disc and the reducer;

[0014] The sealing assembly for a drive system provided in the first aspect of this application is sleeved on the drive shaft and disposed in the first gap, and the sealing assembly abuts against the reducer and the adapter disc respectively.

[0015] In one possible design, the drive shaft is provided with a slot, and the sealing assembly is at least partially embedded in the slot.

[0016] In one possible design, the sealing assembly abuts against the inner wall of the slot along the radial direction of the drive shaft.

[0017] In one possible design, the reducer includes a planetary gear carrier, with the first clearance formed between the planetary gear carrier and the adapter disc.

[0018] In one possible design, the drive system further includes an elastic element, and a fourth gap is formed radially outside the first gap between the planetary gear carrier and the adapter disk, the elastic element being disposed in the fourth gap and abutting against the planetary gear carrier and the adapter disk respectively.

[0019] The technical solution provided in this application can achieve the following beneficial effects:

[0020] This application, by setting a sealing component, can block the path of lubricating oil leakage to the outside, preventing lubricating oil in the transmission from seeping to the outside. At the same time, the sealing component can effectively utilize the existing space between the adapter plate and the reducer, without occupying additional space or changing the transmission design, which is conducive to improving the integration of the IWD system and simplifying the structure.

[0021] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the drive system provided in an embodiment of this application;

[0023] Figure 2 for Figure 1 Enlarged view at point A;

[0024] Figure 3 This is a schematic diagram of the structure of the sealing component in the drive system provided in the embodiments of this application;

[0025] Figure 4 This is a schematic diagram of the structure of the flexible element in a sealing assembly provided in one embodiment of this application;

[0026] Figure 5 An enlarged view of the drive system at the sealing assembly provided in an embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the structure of a metal component in a sealing assembly provided in one embodiment of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1-Shell;

[0030] 2-Drive shaft; 21-Slot;

[0031] 3-Reducer; 31-Planetary gear support; 32-Planetary gear;

[0032] 4-Adapter disk;

[0033] 5-Sealing assembly; 51-Metal part; 51a-First end; 51b-Second end; 511-Through hole; 512-Notch; 52-Flexible part; 521-Corrugated structure; 5211-Protrusion;

[0034] 6-Elastic element;

[0035] G1 - First gap;

[0036] G2 - Second gap;

[0037] G3 - Third gap;

[0038] X-axis;

[0039] Y-radial.

[0040] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0042] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0044] Figure 1 This is a schematic diagram of the structure of the driving system provided in the embodiments of this application, such as... Figure 1 As shown, this drive system can be an Intelligent Wheel Drive (IWD) system. This drive system can be applied to vehicles and can automatically adjust the vehicle's drive mode through a sophisticated electronic control system, switching between two-wheel drive and four-wheel drive modes in real time according to road conditions and driving needs.

[0045] The drive system may include an electric motor system, a gearbox system, and a braking system. The electric motor system drives the wheels, the gearbox system reduces the speed of the electric motor system and transmits the slower speed to the wheels, and the braking system stops the wheels.

[0046] The drive system also includes a housing 1, and the braking system includes a brake caliper and an adapter disc 4. The brake caliper can be fixed to the housing 1 via the adapter disc 4.

[0047] The drive system also includes a drive shaft 2, which can be connected to the wheel hub. The power output from the motor system can be transmitted to the wheel hub through the drive shaft 2, thereby driving the wheel. The drive shaft 2 can be rotatably connected to the housing 1. For example, the housing 1 can be a hollow shaft structure, and the drive shaft 2 can be rotatably connected to the housing 1 through bearings.

[0048] The gearbox system includes a reducer 3, which can be mounted on the drive shaft 2. For example, Figure 2 for Figure 1 The enlarged view at point A, as shown Figure 2 As shown, the reducer 3 may include two stages of planetary gears 32, which enable two-stage speed reduction. Exemplarily, the first stage planetary gear set converts the high-speed, low-torque input of the motor into a medium-speed, medium-torque output. The second stage planetary gear set further reduces the speed and amplifies the torque, ultimately outputting a low-speed, high-torque output suitable for wheel drive via the drive shaft 2.

[0049] Among them, the two-stage planetary gear 32 can be mounted on the planetary gear support 31, and the planetary gear support 31 can be connected to the transmission shaft 2 and can rotate synchronously with the transmission shaft 2.

[0050] like Figure 2 As shown, an elastic element 6, which can be a disc-shaped spring, can be provided between the planetary gear support 31 and the adapter disc 4. The two ends of the elastic element 6 can respectively abut against the planetary gear support 31 and the adapter disc 4. During deceleration and braking, the adapter disc 4 can move relative to the drive shaft 2 along the axial direction X. When the adapter disc 4 moves towards the planetary gear support 31, it can compress the elastic element 6, causing the elastic element 6 to undergo elastic deformation to achieve a buffering effect.

[0051] In a specific implementation, such as Figure 2 As shown, a fourth gap G4 is formed radially outside the first gap G1 between the planetary gear carrier 31 and the adapter disk 4. The elastic element 6 is disposed in the fourth gap G4 and abuts against both the planetary gear carrier 31 and the adapter disk 4. The width of the fourth gap G4 is greater than the width of the first gap G1, thereby allowing the elastic element 6 to have a larger deformation space. At the same time, the elastic element 6 and the sealing assembly 5 are located in two different gaps, which can avoid mutual interference between the elastic element 6 and the sealing assembly 5.

[0052] Among them, such as Figure 2 As shown, to compensate for assembly errors or thermal expansion, a second clearance G2 may be present between the planetary gear carrier 31 and the drive shaft 2 along the radial direction Y. To ensure that the adapter disk 4 can move relative to the drive shaft 2 along the axial direction X, a third clearance G3 is present between the adapter disk 4 and the drive shaft 2 along the radial direction Y. It can be understood that the second clearance G2 and the third clearance G3 are distributed along the axial direction X of the drive shaft 2, and the second clearance G2 and the third clearance G3 are connected.

[0053] like Figure 2 As shown, along the axial direction X of the drive shaft 2, there is a first gap G1 between the adapter disk 4 and the reducer. The drive system also includes a sealing assembly 5, which is annular and can be sleeved on the drive shaft 2. It is disposed in the first gap G1 between the adapter disk 4 and the reducer. The sealing assembly 5 abuts against the planetary gear support 31 in the reducer 3 and the adapter disk 4, respectively.

[0054] The gearbox stores lubricating oil for lubricating various components. This lubricating oil is prone to leakage at the aforementioned second gap G2 and third gap G3. Therefore, in this embodiment, a sealing component 5 is installed at the first gap G1 between the reducer and the adapter disc 4, and this sealing component 5 is fitted onto the drive shaft 2. This effectively blocks the path of lubricating oil leakage. Specifically, the sealing component 5 blocks the leakage between the second gap G2 and the third gap G3. When lubricating oil leaks outward through the second gap G2, it is blocked by the sealing component 5, preventing further leakage through the third gap G3. Thus, the sealing component 5 achieves a seal for the lubricating oil. Furthermore, this sealing component 5 effectively utilizes the existing space between the adapter disc 4 and the reducer, without requiring additional space or changes to the gearbox design. This improves the integration of the IWD system and simplifies the structure.

[0055] Figure 3 This is a schematic diagram of the structure of the sealing component 5 in the drive system provided in the embodiments of this application, as shown below. Figure 3 As shown, the sealing assembly 5 includes a flexible element 52 and a C-shaped metal element 51 embedded in the flexible element 52. Specifically, the flexible element 52 wraps around the outer surface of the metal element 51, and the flexible element 52 abuts against the planetary gear support 31 and the adapter disc 4 in the reducer. The flexible element 52 can completely enclose the metal element 51 or only partially enclose it. The metal element 51 can be made of steel, alloys, or other materials with a certain degree of hardness and ductility. When the adapter disc 4 moves relative to the drive shaft 2 and presses against the sealing assembly 5, the metal element 51 can undergo slight deformation due to its ductility, thus preventing breakage due to excessive rigidity.

[0056] The flexible component 52 has a certain elastic deformation capability. In one embodiment, Figure 4 This is a schematic diagram of the structure of the flexible member 52 in the sealing assembly 5 provided in one embodiment of this application, as shown below. Figure 4 As shown, the flexible component 52 can be a circular structure. The flexible component 52 can completely enclose the metal component 51 inside, so that the metal component 51 is not exposed. The flexible component 52 contacts the planetary gear support 31 and the adapter disk 4 of the reducer, thereby avoiding rigid contact between the metal component 51 and the adapter disk 4 and the planetary gear support 31, which would cause wear on the metal component 51, the adapter disk 4 and the planetary gear support 31, and reduce noise during collision. At the same time, during the compression process, the flexible component 52 can reliably fit with the adapter disk 4 and the planetary gear support 31 through its own elastic deformation, improving the sealing effect.

[0057] The flexible component 52 can be made of rubber. The rubber flexible component 52 can have a certain elastic deformation ability. When it is squeezed, it can undergo elastic deformation, which improves the sealing between the flexible component 52 and the planetary gear support 31 and the adapter disk 4. At the same time, it can avoid rigid contact and damage to the sealing component 5, the planetary gear support 31 and the adapter disk 4.

[0058] Figure 5 An enlarged view of the drive system provided in the embodiments of this application at the sealing component 5, as shown below. Figure 5 As shown, at least one end face of the flexible member 52 along the axial direction X of the drive shaft 2 is provided with a corrugated structure 521. Exemplarily, the end face of the flexible member 52 facing the adapter disk 4 may be provided with a corrugated structure 521, which has a plurality of protrusions 5211. These protrusions 5211 are prone to elastic deformation when squeezed by the adapter disk 4, which can better achieve the buffering effect and also better ensure that the sealing assembly 5 is clamped between the adapter disk 4 and the planetary gear support 31.

[0059] In some other embodiments, the end face of the flexible member 52 facing the planetary gear support 31 may also be provided with a corrugated structure.

[0060] Figure 6 This is a schematic diagram of the structure of the metal part 51 in the sealing assembly 5 provided in one embodiment of this application, as shown below. Figure 6 As shown, in one embodiment, the metal part 51 may be provided with a through hole 511, and at least a portion of the flexible part 52 is filled into the through hole 511. The flexible part 52 may be made of rubber material, and the flexible part 52 may be integrally formed with the metal part 51 through a vulcanization process, allowing a portion of the material of the flexible part 52 to fill the through hole 511, thereby ensuring the reliability of the connection between the flexible part 52 and the metal part 51.

[0061] In one embodiment, such as Figure 6 As shown, the metal part 51 has a first end 51a, a second end 51b, and a notch 512 between the first end 51a and the second end 51b in the circumferential direction. At least a portion of the flexible part 52 fills the notch 512. The metal part 51 is broken at the notch 512, meaning that the metal part 51 is not a closed ring. This allows the metal part 51 to deform in the circumferential direction, facilitating the fitting of the metal onto the drive shaft 2 from the notch 512 and preventing the metal part 51 from breaking due to stress concentration during compression. The flexible part 52 can fill the notch 512, achieving complete encapsulation of the metal part 51 to protect it.

[0062] In one embodiment, such as Figure 5As shown, a groove 21 is provided on the drive shaft 2, which surrounds the circumference of the drive shaft 2. At least a portion of the sealing component 5 can be embedded in the groove 21. This groove 21 ensures a reliable connection between the sealing component 5 and the drive shaft 2, preventing the sealing component 5 from disengaging. Simultaneously, the groove 21 is recessed towards the axis of the drive shaft 2, allowing the end face of the sealing component 5 along the axial direction X to abut against the side wall of the groove 21, and the side surface of the sealing component 5 along the radial direction Y to abut against the bottom surface of the groove 21. This increases the contact area between the sealing component 5 and the drive shaft 2, while also extending the leakage path of the lubricating oil and improving sealing performance.

[0063] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sealing assembly for a drive system, characterized in that, The sealing assembly is annular and is used to be sleeved on the drive shaft (2) of the drive system. The sealing assembly includes a flexible element (52) and a C-shaped metal element (51) embedded in the flexible element (52).

2. The sealing assembly for a drive system according to claim 1, characterized in that, The flexible member (52) has a corrugated structure (521) on at least one end face along the axial direction (X) of the transmission shaft (2).

3. The sealing assembly for a drive system according to claim 1, characterized in that, The metal part (51) is provided with an axial through hole (511), and at least a portion of the flexible part (52) is filled into the through hole (511).

4. The sealing assembly for a drive system according to claim 1, characterized in that, The metal part (51) has a first end, a second end, and a notch (512) between the first end and the second end in the circumferential direction, and at least a portion of the flexible part (52) fills the notch (512).

5. The sealing assembly for a drive system according to claim 1, characterized in that, The flexible component (52) is made of rubber.

6. A drive system, characterized in that, include: Drive shaft (2); A speed reducer is connected to the drive shaft (2); The adapter disk (4) has a first gap (G1) between it and the reducer along the axial direction (X) of the drive shaft (2); The sealing assembly (5) for the drive system according to any one of claims 1 to 5 is sleeved on the drive shaft (2) and disposed in the first gap (G1), and the sealing assembly (5) abuts against the reducer and the adapter disc (4) respectively.

7. The drive system according to claim 6, characterized in that, The drive shaft (2) is provided with a slot (21), and the sealing component (5) is at least partially embedded in the slot (21).

8. The drive system according to claim 7, characterized in that, Along the radial (Y) direction of the drive shaft (2), the sealing assembly (5) abuts against the inner wall of the slot (21).

9. The drive system according to any one of claims 6-8, characterized in that, The reducer (3) includes a planetary gear carrier (31), and the first gap (G1) is formed between the planetary gear carrier (31) and the adapter disk (4).

10. The drive system according to claim 9, characterized in that, It also includes an elastic element (6), and a fourth gap is formed radially outside the first gap (G1) between the planetary gear support (31) and the adapter disk (4), the elastic element (6) being disposed in the fourth gap and abutting against the planetary gear support (31) and the adapter disk (4) respectively.

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