Sealing ring, windscreen wiper device and vehicle

Abstract

The utility model relates to a sealing ring, a windscreen wiper device and a vehicle. The sealing ring comprises an inner ring, an outer ring and a connecting part, the inner ring is located in the outer ring, and the inner ring and the outer ring are arranged at an interval; the connecting part is connected with the inner ring and the outer ring in a sealing manner; in the arrangement direction of the inner ring and the outer ring, the connecting part can be elastically deformed, so that the outer ring can be close to or far away from the inner ring. During use, the inner ring sleeves a first target object and is in sealed connection with the first target object; the outer ring is located in an avoiding hole of the second target object and is in sealed connection with the second target object. Wherein the first target object can be a windscreen wiper driving shaft, and the second target object can be a windscreen wiper cover plate; when the windscreen wiper cover plate is used, the sealing ring can be arranged in the avoiding hole of the windscreen wiper cover plate, so that sealing between the windscreen wiper driving shaft penetrating through the avoiding hole and the windscreen wiper cover plate is achieved, and liquid such as rainwater is prevented from entering a front cabin from the avoiding hole of the windscreen wiper cover plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of wiper seals, and in particular relates to a sealing ring, a wiper device and a vehicle. Background Art

[0002] The front wiper device of a vehicle mainly includes a wiper drive shaft, a wiper arm, a wiper wiper, a motor, a connecting rod mechanism and a wiper cover. The wiper drive shaft includes a support seat and an output shaft. The support seat is installed on the body sheet metal. The output shaft is connected to the support seat, and the output shaft can rotate around its own axis relative to the support seat. The wiper arm is connected to the output shaft, and the wiper wiper is connected to the wiper arm. The motor is connected to the output shaft through a connecting rod mechanism to drive the output shaft to rotate, thereby driving the wiper arm and the wiper wiper to rotate.

[0003] In the prior art, the motor and the connecting rod mechanism are arranged below the wiper cover. The wiper cover is provided with an avoidance hole, and the wiper drive shaft extends out of the wiper cover from the avoidance hole.

[0004] However, during use, rainwater and other liquids may enter the front engine compartment through the avoidance holes in the wiper cover, which may cause problems such as circuit short circuit and rust on the vehicle body. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a sealing ring, a wiper device and a vehicle to solve the problem that liquids such as rainwater may enter the front cabin through the avoidance hole of the wiper cover.

[0006] In order to solve the above problems, on the one hand, the utility model provides a sealing ring, comprising an inner ring, an outer ring and a connecting portion; the inner ring is located inside the outer ring, and the inner ring and the outer ring are spaced apart; the connecting portion sealingly connects the inner ring and the outer ring; in the arrangement direction of the inner ring and the outer ring, the connecting portion can be elastically deformed so that the outer ring can approach or move away from the inner ring.

[0007] Optionally, the inner surface of the inner ring is provided with a first annular protrusion, and the first annular protrusion surrounds the axis of the inner ring.

[0008] Optionally, along the axial direction of the inner ring, the inner ring includes a first hole and a second hole that are connected; the diameter of the first hole is smaller than the diameter of the second hole; and the first annular protrusion is provided on the inner surface of the first hole. Optionally, the sealing ring is provided with a first limiting structure; wherein the first limiting structure is provided on the inner surface of the inner ring; and / or the first limiting structure is a protrusion structure; and / or the first limiting structure is an annular structure and surrounds the axis of the inner ring.

[0009] Optionally, a sealing groove is provided on the outer side surface of the outer ring, and the sealing groove surrounds the inner ring.

[0010] Optionally, a second annular protrusion is provided on the bottom surface of the sealing groove, the second annular protrusion surrounds the inner ring, and in the axial direction of the inner ring, the second annular protrusion is separated from at least one side surface of the sealing groove; and / or a third annular protrusion is provided on at least one side surface of the sealing groove, and the third annular protrusion surrounds the inner ring.

[0011] In order to solve the above problems, on the other hand, the utility model provides a wiper device, comprising a wiper cover, a wiper drive shaft, a wiper arm and a sealing ring as described in any one of the above items; the wiper cover is suitable for connecting to a vehicle body, and a avoidance hole is provided on the wiper cover, and the avoidance hole passes through the wiper cover along the axial direction of the sealing ring; the wiper drive shaft passes through the wiper cover from the avoidance hole and is connected to the wiper arm; the sealing ring is located in the avoidance hole and is sleeved on the wiper drive shaft to seal the connection between the wiper cover and the wiper drive shaft.

[0012] Optionally, a second limiting structure is provided on the wiper drive shaft, and the second limiting structure cooperates with the first limiting structure on the inner ring.

[0013] Optionally, the wiper drive shaft includes a support seat and an output shaft; a connecting hole is provided on the support seat; the connecting hole passes through the support seat in the axial direction of the inner ring; a part of the output shaft is arranged in the connecting hole and can rotate around its own axis relative to the support seat, and the output shaft is connected to the wiper arm; the output shaft is sealed with the inner ring; the second limiting structure is arranged on the support seat.

[0014] In order to solve the above problems, on the other hand, the present invention provides a vehicle, characterized in that it comprises a vehicle body and any one of the wiper devices described above, wherein the wiper device is mounted on the vehicle body.

[0015] In the sealing ring, wiper device, and vehicle provided by the embodiments of the present invention, during use, the inner ring is sleeved onto a first target object and sealed therewith; the outer ring is positioned within a clearance hole of a second target object 30 and sealed therewith. The first target object may be a wiper drive shaft, and the second target object may be a wiper cover.

[0016] In addition, the configuration of this embodiment can also increase the deformation of the sealing ring in the radial direction, so that the sealing ring can better adapt to the change in the radial distance between the first target object and the second target object in the avoidance hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cross-sectional schematic diagram of a sealing ring provided in one embodiment of the present utility model;

[0018] Figure 2 It is a schematic diagram of the cooperation among a sealing ring, a first target object and a second target object provided by one embodiment of the present utility model.

[0019] The reference numerals in the specification are as follows:

[0020] 10. Sealing ring; 20. First target object; 201. Support seat; 202. Output shaft; 203. Connecting hole; 204. Second limiting structure; 30. Second target object; 301. Avoidance hole;

[0021] 1. Inner ring; 11. First ring hole; 12. First hole; 13. Second hole; 14. Third hole;

[0022] 2. Outer ring; 21. Second ring hole;

[0023] 3. Connecting portion; 31. First connecting arm; 32. Second connecting arm;

[0024] 4. Shrink space;

[0025] 5. a first annular protrusion;

[0026] 6. Sealing groove;

[0027] 7. Second annular protrusion;

[0028] 8. third annular protrusion;

[0029] 9. The first limiting structure. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] like Figure 1 and Figure 2As shown, in one embodiment, a sealing ring 10 is used to seal a first target object 20 and a second target object 30. The second target object 30 is provided with a relief hole 301. The first target object 20 is inserted into the relief hole 301. The sealing ring 10 is disposed within the relief hole 301 and is sleeved onto the first target object 20. The sealing ring 10 can close the gap between the first target object 20 and the second target object 30. Furthermore, the sealing ring 10 and the first target object 20 are sealed to prevent water leakage between the two. At the same time, the sealing ring 10 and the second target object 30 are sealed to prevent water leakage between the two. Therefore, the provision of the sealing ring 10 can achieve a sealed connection between the first target object 20 and the second target object 30, preventing liquids such as rainwater from flowing through the gap between the first target object 20 and the second target object 30.

[0032] like Figure 1 and Figure 2 As shown, in one embodiment, the sealing ring 10 can be used in a wiper device, which can be installed at the front of a vehicle to clean water or other debris from the windshield. In this scenario, the wiper device includes, in addition to the sealing ring 10, a wiper cover, a wiper drive shaft, and a wiper arm. In this scenario, the wiper drive shaft is the first target object 20, and the wiper cover is the second target object 30. The wiper drive shaft passes through the wiper cover through a clearance hole 301 and connects to the wiper arm. The sealing ring 10 can close the gap between the wiper cover and the wiper drive shaft (this gap is part of the clearance hole 301), preventing rainwater and other substances from entering the front cabin through the clearance hole 301.

[0033] The wiper device also includes a drive unit and a wiper wiper. The drive unit is connected to a wiper drive shaft, and the wiper wiper is mounted on a wiper arm. The drive unit is configured to rotate the wiper drive shaft, thereby driving the wiper arm to rotate, and in turn, the wiper mounted on the wiper arm to rotate, thereby cleaning the windshield. The drive unit may also include a motor and a connecting rod mechanism, wherein the motor drives the wiper drive shaft to rotate via the connecting rod mechanism.

[0034] like Figure 2 As shown, the wiper drive shaft includes a support base 201 and an output shaft 202. The support base 201 is suitable for connecting to the vehicle body and is provided with a connecting hole 203. The connecting hole 203 extends through the support base 201 in the axial direction of the sealing ring 10. A portion of the output shaft 202 is disposed within the connecting hole 203 and is capable of rotating about its axis relative to the support base 201. The output shaft 202 is connected to the wiper arm. The motor drives the output shaft 202 via a connecting rod mechanism, causing the output shaft 202 to rotate relative to the support base 201.

[0035] After assembly, the sealing ring 10 and the output shaft 202 are sealed to prevent liquids such as rainwater from entering the connecting hole 203 .

[0036] In addition, the sealing ring 10 is also sleeved on the support base 201, that is, the support base 201 is also penetrated into the sealing ring 10. In this way, the sealing ring 10 can cover the connecting hole 203 and improve the waterproof effect.

[0037] After assembly, both ends of the output shaft 202 extend out of the clearance hole 301 in the axial direction of the sealing ring 10. One end of the output shaft 202 is located below the wiper cover and connected to the linkage mechanism, while the other end is located above the wiper cover and connected to the wiper arm. Furthermore, the support base 201 can be located completely below the wiper cover, or partially below the wiper cover while the other portion is located within the clearance hole 301 but not extending above the wiper cover. Alternatively, the support base 201 can be located partially below the wiper cover, partially within the clearance hole 301, and partially above the wiper cover.

[0038] In one embodiment, the avoidance hole 301 may be a circular hole, and the output shaft 202 and the support seat 201 may both be cylindrical structures.

[0039] like Figure 1 and Figure 2 As shown, in one embodiment, a sealing ring 10 comprises an inner ring 1, an outer ring 2, and a connecting portion 3. The inner ring 1 is positioned within the outer ring 2, with the inner ring 1 and outer ring 2 spaced apart. The connecting portion 3 seals the inner ring 1 and outer ring 2. The connecting portion 3 elastically deforms in the arrangement of the inner ring 1 and outer ring 2, allowing the outer ring 2 to move closer to or further away from the inner ring 1. During use, the inner ring 1 is sleeved onto a first target object 20 and sealed therewith. The outer ring 2 is positioned within a clearance hole 301 of a second target object 30 and sealed therewith. Furthermore, this embodiment increases the radial deformation of the sealing ring 10, allowing the sealing ring 10 to better adapt to changes in the radial spacing between the first and second target objects 20 and 30 within the clearance hole 301.

[0040] The inner ring 1, connecting portion 3, and outer ring 2 are all annular structures and are arranged sequentially from the inside out. They can be coaxial, or at least two of them can be coaxial. The arrangement direction of the inner ring 1 and outer ring 2 is the radial direction of the inner ring 1. Furthermore, the axial direction of the sealing ring 10 is the axial direction of the inner ring 1, and the radial direction of the sealing ring 10 is the radial direction of the inner ring 1.

[0041] It should be noted that the inner ring 1 , the connecting portion 3 and the outer ring 2 are all closed-loop structures.

[0042] In addition, the cross-section of the annular hole of the inner ring 1 (defined as the first annular hole 11) can be circular, and the cross-section of the annular hole of the outer ring 2 (defined as the second annular hole 21) can be circular. In the axial direction of the inner ring 1, the first annular hole 11 penetrates the inner ring 1. The inner ring 1 being sleeved on the first target object 20 means that the first target object 20 is inserted into the first annular hole 11. In the axial direction of the inner ring 1, the second annular hole 21 penetrates the outer ring 2. The inner ring 1 being disposed within the outer ring 2 means that the inner ring 1 is disposed within the second annular hole 21. Furthermore, the radial direction of the inner ring 1 is the radial direction of the first annular hole 11, and the axial direction of the inner ring 1 is the axial direction of the first annular hole 11.

[0043] “The connection portion 3 sealingly connects the inner ring 1 and the outer ring 2 ” means that the connection portion 3 completely closes the gap between the inner ring 1 and the outer ring 2 (this gap is defined as the first gap), so that liquids such as rainwater cannot flow through the sealing ring 10 from the first gap.

[0044] like Figure 1 As shown, in one embodiment, the inner ring 1, outer ring 2, and connecting portion 3 enclose a contraction space 4 with one end open. This arrangement facilitates the outer ring 2 to move radially toward or away from the inner ring 1. Specifically, in the axial direction of the inner ring 1, the outer ring 2 has a first end and a second end disposed opposite each other. In the axial direction of the inner ring 1, the connecting portion 3 is connected to the middle portion of the inner ring 1 and to the first end of the outer ring 2, thereby enclosing the contraction space 4 with one end open.

[0045] Of course, in other embodiments, the connecting portion 3 may also be connected to one end of the inner ring 1 .

[0046] like Figure 1 and Figure 2 As shown, in one embodiment, the connecting portion 3 is a V-shaped structure, which includes a first connecting arm 31 and a second connecting arm 32 connected in sequence, the first connecting arm 31 is connected to the inner ring 1, and the second connecting arm 32 is connected to the outer ring 2. Moreover, the connecting portion 3 is located outside the first gap, and at this time, the V-shaped groove of the connecting portion 3 is connected to the first gap.

[0047] In addition, the first connecting arm 31 and the second connecting arm 32 may both be plate-shaped structures, and both the first connecting arm 31 and the second connecting arm 32 may be closed-loop structures, with the first connecting arm 31 located inside the second connecting arm 32 .

[0048] In one embodiment, the inner ring 1 , the outer ring 2 and the connecting portion 3 are integrally formed, and in this case, the materials of the three can all be rubber materials.

[0049] like Figure 1As shown, in one embodiment, the inner surface of the inner ring 1 is provided with a first annular protrusion 5, which surrounds the axis of the inner ring 1 and is suitable for sealingly connecting with a first target object 20. During use, the first target object 20 is inserted into the first annular protrusion 5, and the sealing ring 10 is sealed with the first target object 20 via the annular protrusion. This arrangement is more conducive to achieving a seal between the sealing ring 10 and the first target object 20.

[0050] Among them, the inner surface of the inner ring 1 is actually the surface of the inner ring 1 used to enclose and form its first annular hole 11. The first annular protrusion 5 is equivalent to a rib set on the inner surface of the inner ring 1. The rib is a closed-loop structure. After assembly, the rib is interference fit with the first target object 20. The setting of the first annular protrusion 5 can reduce the contact area between the sealing ring 10 and the first target object 20, which is more conducive to achieving sealing between the sealing ring 10 and the first target object 20.

[0051] In addition, the longitudinal section of the first annular protrusion 5 may be semicircular.

[0052] Furthermore, there are multiple first annular protrusions 5, each spaced apart along the axial direction of the inner ring 1. After assembly, each first annular protrusion 5 has an interference fit with the first target object 20, achieving a seal with the first target object 20. This improves the sealing effect between the sealing ring 10 and the first target object 20. "Multiple" means greater than or equal to two, and the term "multiple" has the same meaning in all embodiments.

[0053] When the sealing ring 10 is applied to a wiper device, lubricating oil can be stored in the gap between two adjacent first annular protrusions 5 to reduce friction between the sealing ring 10 and the output shaft 202 .

[0054] like Figure 1 As shown, in one embodiment, along the axial direction of the inner ring 1, the inner ring 1 includes a first hole 12 and a second hole 13 that are interconnected. The diameter of the first hole 12 is smaller than that of the second hole 13. The first annular protrusion 5 is provided on the inner surface of the first hole 12, and the first retaining structure 9 is provided on the inner surface of the second hole 13. In other words, the first annular hole 11 includes the first hole 12 and the second hole 13. Alternatively, both the first hole 12 and the second hole 13 can be circular holes.

[0055] In some scenarios, such a configuration is more conducive to the sealing connection between the sealing ring 10 and the first target object 20 .

[0056] For example, when using the sealing ring 10 to seal the wiper cover and wiper drive shaft of a wiper device, the wiper drive shaft includes a support base 201 and an output shaft 202. Because the diameter of the support base 201 is larger than the diameter of the output shaft 202, the diameter of the hole in the area of the inner ring 1 that engages with the support base 201 must be larger than the diameter of the area that engages with the output shaft 202. Therefore, after assembly, the first hole 12 engages with the output shaft 202 (i.e., the sealing ring 10 is sealed and connected to the output shaft 202), and the second hole 13 engages with the support base 201.

[0057] like Figure 1 As shown, the inner ring 1 also has a third hole 14, which is located between the first hole 12 and the second hole 13. The third hole 14's two ends are connected to the first hole 12 and the second hole 13, respectively. The cross-sectional radius of the first hole 12 can be uniform throughout, and the cross-sectional radius of the second hole 13 can be uniform throughout. The cross-sectional radius of the third hole 14 gradually decreases from the second hole 13 to the first hole 12. The third hole 14 can be a tapered hole. In some scenarios, the first annular hole 11 can be composed of the first hole 12, the second hole 13, and the third hole 14.

[0058] like Figure 1 As shown, in one embodiment, a sealing groove 6 is provided on the outer side of the sealing ring 10. The sealing groove 6 surrounds the inner ring 1 and is suitable for receiving a second target object 30, thereby achieving a sealed connection between the sealing ring 10 and the second target object 30. For some plate-like structures, which are relatively thin (i.e., the second target object 30 is relatively small in the axial direction of its avoidance hole 301), the sealing effect may not be satisfactory if the sealing ring 10 and the avoidance hole 301 are sealed only by an interference fit. In this embodiment, however, the second target object 30 is placed in the sealing groove 6, and the groove wall of the sealing groove 6 can shield the avoidance hole 301, thereby improving the sealing effect.

[0059] Furthermore, the outer side surface of the sealing ring 10 refers to the outer surface of the sealing ring 10 in the radial direction of the inner ring 1. When the sealing ring 10 comprises the inner ring 1, the outer ring 2, and the connecting portion 3, the outer side surface of the sealing ring 10 refers to the outer side surface of the outer ring 2. Specifically, the outer side surface of the outer ring 2 refers to the surface of the outer ring 2 facing away from the inner ring 1 in the radial direction of the inner ring 1.

[0060] like Figure 1 As shown, in one embodiment, a second annular protrusion 7 is provided on the bottom surface of the sealing groove 6. The second annular protrusion 7 surrounds the inner ring 1 and is spaced from at least one side surface of the sealing groove 6 in the axial direction of the inner ring 1. After assembly, the second annular structure forms an interference fit with the avoidance hole 301. The provision of the second annular protrusion 7 improves the sealing effect between the sealing ring 10 and the inner surface of the avoidance hole 301.

[0061] Typically, the second annular protrusion 7 is spaced apart from each side surface of the sealing groove 6 .

[0062] In addition, the sealing groove 6 may be a rectangular groove. In the axial direction of the inner ring 1 , the sealing groove 6 has two side surfaces, and both side surfaces intersect with the bottom surface of the sealing groove 6 .

[0063] In addition, in the axial direction of the inner ring 1 , the second annular protrusion 7 does not extend out of the sealing groove 6 , the second annular protrusion 7 is a closed-loop structure, and the longitudinal section of the second annular protrusion 7 may be semicircular.

[0064] like Figure 1 As shown, in one embodiment, a third annular protrusion 8 is provided on at least one side surface of the sealing groove 6 , and the third annular protrusion 8 surrounds the inner ring 1 .

[0065] After assembly, the third annular protrusion 8 can be sealed to the surface of the second target object 30 in the thickness direction to improve the sealing effect between the sealing ring 10 and the second target object 30. In addition, the third annular protrusion 8 is a closed loop structure.

[0066] In actual products, the second annular protrusion 7 and the third annular protrusion 8 may be provided at the same time, or only one of them may be provided.

[0067] like Figure 2 As shown, the third annular protrusion 8 is located at the opening of the sealing groove 6, where the opening of the sealing groove 6 is the opening formed on the outer surface of the sealing ring 10. In the radial direction of the inner ring 1, the outer surface of the third annular protrusion 8 can be flush with the outer side surface of the outer ring 2. The thickness of the third annular protrusion 8 gradually increases from the bottom surface of the sealing groove 6 to the opening of the sealing groove 6. The thickness of the third annular protrusion 8 refers to the dimension of the third annular protrusion 8 in the axial direction of the inner ring 1.

[0068] like Figure 1 As shown, in one embodiment, a first limiting structure 9 is provided on the sealing ring 10; the first limiting structure 9 is adapted to cooperate with a second limiting structure 204 provided on the first target object 20 of the inner ring 1 to define the position of the sealing ring 10 relative to the first target object 20. The cooperation between the first limiting structure 9 and the second limiting structure 204 can define the position of the sealing ring 10 relative to the first target object 20, maintaining the sealing ring 10 in a suitable position on the first target object 20 to ensure a sealed connection between the first target object 20 and the second target object 30. Furthermore, the cooperation between the first limiting structure 9 and the second limiting structure 204 primarily defines the relative position of the sealing ring 10 and the first target object 20 in the axial direction of the sealing ring 10, as well as the relative position of the sealing ring 10 and the first target object 20 in the radial direction of the inner ring 1.

[0069] like Figure 1As shown, in one embodiment, the first limiting structure 9 is arranged on the inner surface of the inner ring 1. This arrangement can reduce the probability of the first limiting structure 9 being scratched by foreign objects and increase the service life of the sealing ring 10.

[0070] like Figure 1 and Figure 2 As shown, in one embodiment, the first limiting structure 9 is a protruding structure. In this case, the second limiting structure 204 is a groove structure. When the first limiting structure 9 and the second limiting structure 204 cooperate, the protruding structure is located in the groove structure, and the groove wall of the groove structure limits the protruding structure.

[0071] In other embodiments, the first limiting structure 9 may be a groove structure, and the second limiting structure 204 may be a protrusion structure.

[0072] In one embodiment, the first limiting structure 9 is an annular structure that surrounds the axis of the inner ring 1. When the first limiting structure 9 is a protrusion, it is an annular protrusion. In this case, the second limiting structure 204 is an annular groove. Both the first limiting structure 9 and the second limiting structure 204 can be closed-loop structures. The first limiting structure 9 is a rectangular protrusion, and the second limiting structure 204 is a rectangular groove. In other words, the longitudinal cross-section of the first limiting structure 9 can be rectangular, while the longitudinal cross-section of the second limiting structure 204 is rectangular.

[0073] In addition, it should be noted that the three settings of the first limiting structure 9 being arranged on the inner surface of the inner ring 1, the first limiting structure 9 being a raised structure, and the first limiting structure 9 being an annular structure can be provided at the same time, or only one or two of them can be provided.

[0074] like Figure 1 As shown, in one embodiment, the first limiting structure 9 may be disposed in the second hole.

[0075] In one embodiment, the second limiting structure 204 is disposed on the support base 201 , so as to avoid adverse effects on the cooperation between the first limiting structure 9 and the second limiting structure 204 caused by the rotation of the output shaft 202 .

[0076] An embodiment of the present invention further provides a vehicle, comprising a vehicle body and the wiper device described in any one of the above embodiments, wherein the wiper device is mounted on the vehicle body.

[0077] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sealing ring, characterized in that: including an inner ring, an outer ring and a connecting portion; The inner ring is located inside the outer ring, and the inner ring and the outer ring are spaced apart; The connecting portion seals and connects the inner ring and the outer ring; the connecting portion is elastically deformable so that the outer ring can move closer to or farther away from the inner ring.

2. The sealing ring according to claim 1, characterized in that: The inner surface of the inner ring is provided with a first annular protrusion, and the first annular protrusion surrounds the axis of the inner ring.

3. The sealing ring according to claim 2, characterized in that: Along the axial direction of the inner ring, the inner ring includes a first hole and a second hole that are connected; The aperture of the first hole is smaller than the aperture of the second hole; The first annular protrusion is provided on the inner surface of the first hole.

4. The sealing ring according to claim 1, characterized in that A sealing groove is provided on the outer side surface of the outer ring, and the sealing groove surrounds the inner ring.

5. The sealing ring according to claim 4, characterized in that: A second annular protrusion is provided on the bottom surface of the sealing groove, the second annular protrusion surrounds the inner ring, and in the axial direction of the inner ring, the second annular protrusion is spaced from at least one side surface of the sealing groove; and / or, A third annular protrusion is provided on at least one side surface of the sealing groove, and the third annular protrusion surrounds the inner ring.

6. The sealing ring according to any one of claims 1 to 5, characterized in that: The sealing ring is provided with a first limiting structure; Wherein, the first limiting structure is arranged on the inner surface of the inner ring; and / or, the first limiting structure is a protruding structure; and / or, the first limiting structure is an annular structure and surrounds the axis of the inner ring.

7. A wiper device, characterized in that: It comprises a wiper cover, a wiper drive shaft, a wiper arm, and the sealing ring according to any one of claims 1 to 6; The wiper cover is suitable for connecting to the vehicle body, and a avoidance hole is provided on the wiper cover, and the avoidance hole passes through the wiper cover along the axial direction of the sealing ring; The wiper drive shaft passes through the wiper cover from the avoidance hole and is connected to the wiper arm; The sealing ring is located in the avoidance hole and is sleeved on the wiper drive shaft to seal and connect the wiper cover plate and the wiper drive shaft.

8. The wiper device according to claim 7, wherein: The wiper drive shaft is provided with a second limiting structure, and the second limiting structure cooperates with the first limiting structure on the inner ring.

9. The wiper device according to claim 8, wherein: The wiper drive shaft includes a support seat and an output shaft; The support seat is provided with a connecting hole; In the axial direction of the inner ring, the connecting hole passes through the support seat; A portion of the output shaft is disposed in the connecting hole and is capable of rotating relative to the support seat around its own axis, and the output shaft is connected to the wiper arm; The output shaft is sealed with the inner ring; The second limiting structure is arranged on the supporting seat.

10. A vehicle, characterized in that: The invention comprises a vehicle body and the wiper device according to any one of claims 7 to 9, wherein the wiper device is mounted on the vehicle body.

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