Bearing and vehicle

Abstract

The invention discloses a bearing and a vehicle with the same, and relates to the technical field of mechanical parts, the bearing comprises an inner ring, an outer ring, a plurality of balls, a first sealing piece and a conductive piece, the outer wall of the inner ring is provided with a first convex part, and the inner wall of the outer ring is provided with a second convex part; the plurality of balls are rotatably arranged between the inner ring and the outer ring; the first sealing piece is arranged between the first convex part and the second convex part to form a sealing cavity; and the conductive piece is arranged in the sealing cavity. According to the bearing disclosed by the embodiment of the invention, the sealing cavity is formed in the bearing, and the conductive piece is arranged in the sealing cavity, so that a conductive effect can be achieved, common-mode shaft voltage generated by the inner ring and the outer ring is conducted, electric spark discharge is not formed, and the electric corrosion of the bearing is prevented.

Description

Technical Field

[0001] This invention relates to the field of mechanical parts technology, and in particular to a bearing and a vehicle having the bearing. Background Technology

[0002] Bearings are widely used in industrial equipment, automobiles, aerospace and other fields, and their performance directly affects the operating efficiency and service life of mechanical equipment.

[0003] With the continuous development of new energy vehicles, the problem of electro-corrosion of electric drive bearings has become a new industry issue. Due to the voltage division effect of parasitic capacitance in the electric drive system, a common-mode voltage is generated on the motor shaft, which in turn generates shaft voltage. When the common-mode shaft voltage exceeds the insulation capacity of the bearing oil film, the oil film is broken down, forming an electric spark discharge phenomenon. This causes ablation and spotting on the surface of the bearing's inner and outer rings and balls. As the spots accumulate, obvious washboard patterns appear on the surface of the bearing's inner and outer rings and balls, i.e., bearing electro-corrosion, which affects the life of the electric drive. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, one object of this invention is to provide a bearing with a conductive element that can conduct electricity, allowing the common-mode shaft voltage generated between the inner and outer rings to be conducted without forming electrical spark discharge, thereby preventing bearing electro-corrosion.

[0005] The present invention also proposes a vehicle including the aforementioned bearing.

[0006] According to an embodiment of the present invention, a bearing includes: an inner ring, an outer ring, a plurality of balls, a first seal, and a conductive element. The outer wall of the inner ring is provided with a first protrusion, and the inner wall of the outer ring is provided with a second protrusion. The plurality of balls are rotatably disposed between the inner ring and the outer ring. The first seal is disposed between the first protrusion and the second protrusion to form a sealing cavity. The conductive element is disposed in the sealing cavity.

[0007] According to an embodiment of the present invention, the bearing can achieve conductivity by constructing a sealed cavity inside the bearing and providing a conductive element inside the sealed cavity, so that the common mode shaft voltage generated by the inner and outer rings can be conducted, preventing the formation of electric spark discharge, thereby preventing bearing electro-corrosion.

[0008] In addition, the bearing according to the above embodiments of the present invention may also have the following additional technical features: In some embodiments of the present invention, the outer wall of the outer ring is provided with an opening groove facing outward, the outer ring is also provided with a liquid guiding channel, the liquid guiding channel connects the opening groove and the sealing cavity, and the bearing further includes a fastener, the fastener is fixedly connected to the outer ring and at least a portion is provided in the opening groove to close the liquid guiding channel.

[0009] In some embodiments of the present invention, the conductive element includes a first conductive element, which is a conductive liquid, and the first conductive element is injected into the sealed cavity through the liquid channel.

[0010] In some embodiments of the present invention, the outer wall of the outer ring is provided with a first groove and a second groove arranged at intervals along the bearing axial direction, and the opening groove is provided between the first groove and the second groove; the bearing further includes a second seal, the second seal including a first sealing ring and a second sealing ring, a portion of the first sealing ring being provided in the first groove and a portion protruding from the outer peripheral surface of the outer ring, and the second sealing ring being provided in the second groove and a portion protruding from the outer peripheral surface of the outer ring.

[0011] In some embodiments of the present invention, the first seal further includes a connecting portion that connects the first sealing ring and the second sealing ring axially, the connecting portion being disposed around the opening groove.

[0012] In some embodiments of the present invention, the bearing further includes a retaining ring, the conductive element includes a second conductive element, and the retaining ring has a plurality of retaining grooves on its circumferential inner side; the second conductive element is a conductive brush or non-woven fabric, the inner wall of the outer ring is provided with a third groove, the third groove is located on the side of the sealing cavity near the outer periphery of the bearing, the second conductive element is pressed into the retaining groove, and the opposite ends of the retaining ring are supported between the inner wall of the inner ring and the third groove.

[0013] In some embodiments of the present invention, the first sealing element includes a third sealing ring and a fourth sealing ring, the third sealing ring and the fourth sealing ring respectively sealing opposite sides of the sealing cavity along the axial direction, the fourth sealing ring being disposed on the side of the sealing cavity near the outer periphery of the bearing, and the conductive element including a second conductive element, the second conductive element being a conductive brush or non-woven fabric, the second conductive element being integrated into the fourth sealing ring.

[0014] In some embodiments of the present invention, the bearing further includes a retaining ring, the retaining ring having a plurality of retaining grooves on its circumferential inner side; the conductive element includes a second conductive element, the second conductive element being a conductive brush or non-woven fabric, the second conductive element being pressed into the retaining grooves, the inner wall of the outer ring having a third groove, the third groove being located on the side of the sealing cavity near the outer periphery of the bearing, and the opposite ends of the retaining ring being supported between the inner wall of the inner ring and the third groove.

[0015] In some embodiments of the present invention, the bearing further includes a cage disposed between the inner ring and the outer ring, and located on the side of the bearing axially away from the first seal, the first seal sealing the other end face of the bearing axially.

[0016] The vehicle according to an embodiment of the present invention includes the aforementioned bearing.

[0017] According to embodiments of the present invention, by applying the aforementioned bearings, bearing electro-corrosion can be prevented, thereby extending the electric drive life. Attached Figure Description

[0018] Figure 1 These are schematic diagrams of the bearing structure in some embodiments of the present invention; Figure 2 These are cross-sectional views of the bearings in some embodiments of the present invention; Figure 3 These are cross-sectional views of the bearings in other embodiments of the present invention; Figure 4 This is a cross-sectional view of the bearing in some embodiments of the present invention; Figure 5 These are cross-sectional views of the bearings in some other embodiments of the present invention; Figure 6 These are schematic diagrams of the retaining ring structure in some embodiments of the present invention; Figure 7 This is a schematic diagram of the structure of the second sealing element in some embodiments of the present invention.

[0019] Figure label: 100, Bearing; 110, Sealing cavity; 10, Inner ring; 11, First protrusion; 103, Third groove; 20, Outer ring; 21, Second protrusion; 201, Opening groove; 202, Liquid guiding channel; 31, First conductive element; 32, Second conductive element; 40, First sealing element; 43, Third sealing ring; 44, Fourth sealing ring; 50, Second sealing element; 51, First sealing ring; 52, Second sealing ring; 53, Connecting part; 60, Fastener; 70, Snap ring; 71, Snap groove; 81, Ball; 82, Cage. Detailed Implementation

[0020] Bearings are widely used in industrial equipment, automobiles, aerospace and other fields, and their performance directly affects the operating efficiency and service life of mechanical equipment.

[0021] With the continuous development of new energy vehicles, the problem of electro-corrosion of electric drive bearings has become a new industry issue. Due to the voltage division effect of parasitic capacitance in the electric drive system, a common-mode voltage is generated on the motor shaft, which in turn generates shaft voltage. When the common-mode shaft voltage exceeds the insulation capacity of the bearing oil film, the oil film is broken down, forming an electric spark discharge phenomenon. This causes ablation and spotting on the surface of the bearing's inner and outer rings and balls. As the spots accumulate, obvious washboard patterns appear on the surface of the bearing's inner and outer rings and balls, i.e., bearing electro-corrosion. This can lead to NVH problems and even bearing failure, affecting the lifespan of the electric drive. Specifically, NVH problems can include N - Noise; V - Vibration; and H - Harshness.

[0022] Therefore, this invention provides a bearing with anti-electro-corrosion function. A conductive material is filled into a sealed cavity between the inner and outer rings of the bearing. When shaft voltage passes through the inner and outer rings, the conductive material conducts the voltage across them with zero potential difference, preventing electrical spark discharge, pitting, and washboard-like marks, thus significantly improving the bearing's NVH performance and lifespan. The main methods for suppressing bearing electro-corrosion include the unblocking method (represented by brushes / carbon brushes and conductive fibers) and the blocking method (represented by insulated bearings / ball bearings). In the unblocking method, due to the influence of lubricating oil in the electric drive system, an oil film remains on the surface of the conductive brush, preventing zero potential difference conduction, and electro-corrosion may still occur. In the blocking method, insulated bearings (such as ceramic balls) cannot fundamentally solve the corrosion problem and may lead to gear corrosion at the other end of the shaft. The bearing provided by this invention uses the unblocking method to conduct shaft voltage and completely seals the conductive material, avoiding the above problems.

[0023] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] Combination Figures 1 to 7 According to an embodiment of the present invention, a bearing 100 includes: an inner ring 10, an outer ring 20, a plurality of balls 81, a first seal 40, and a conductive element. The outer wall of the inner ring 10 is provided with a first protrusion 11, and the inner wall of the outer ring 20 is provided with a second protrusion 21. The plurality of balls 81 are rotatably disposed between the inner ring 10 and the outer ring 20. The first seal 40 is disposed between the first protrusion 11 and the second protrusion 21 and forms a sealing cavity 110. The conductive element is disposed in the sealing cavity 110.

[0025] Specifically, in related technologies, the inner and outer rings of a bearing are annular structures. In this application, the inner ring 10 and outer ring 20 are axially lengthened based on the annular structure, i.e., a first protrusion 11 and a second protrusion 21 are constructed. The first seal 40 can be two identical sealing rings. The sealing lips of the sealing rings make dynamic contact with the outer wall of the inner ring 10 of the bearing 100, thereby forming a sealed cavity, i.e., a sealing cavity 110, inside the bearing 100. The sealing cavity 110 is filled with conductive material. When the electric drive system generates shaft voltage, the conductive structure formed by this sealing cavity 110 will play a conductive role, so that the common mode shaft voltage generated by the inner and outer rings 20 is conducted, and no electric spark discharge is formed, so that the bearing 100 will not be electro-corroded by EDM (electric spark discharge). This solution can also avoid the influence of lubricating oil on the performance of conductive materials such as conductive brushes.

[0026] According to an embodiment of the present invention, the bearing 100 can achieve conductivity by constructing a sealing cavity 110 inside the bearing 100 and providing a conductive element inside the sealing cavity 110, so that the common mode shaft voltage generated by the inner and outer rings 20 can be conducted, and no electric spark discharge will be formed, thereby preventing the bearing 100 from electro-corrosion.

[0027] Combination Figure 2 In some embodiments of the present invention, the first seal 40 seals one axial end face of the bearing 100. This allows the first protrusion 11 and the second protrusion 21 to be located at the ends of the inner ring 10 and the outer end, facilitating manufacturing and assembly. Furthermore, the sealing cavity 110 is located on the axial end face of the bearing 100, which does not obstruct the installation of the balls 81 and is beneficial for spatial arrangement. In other words, the overall structure of the bearing 100 in this application remains unchanged compared to related technologies. Therefore, improvements only require the construction of protrusions and the installation of the first seal 40 and conductive elements, which helps save costs and facilitates widespread application.

[0028] Combination Figure 4 In some embodiments of the present invention, the conductive element includes a first conductive element 31, which is a conductive liquid, and is disposed within the sealed cavity 110. Specifically, the conductive element can be a conductive liquid, and filling the sealed cavity 110 with the conductive liquid results in a simple structure and easy maintenance.

[0029] More specifically, in some embodiments of the present invention, the outer wall of the outer ring 20 is provided with an opening groove 201 with the opening facing outward, and the outer ring 20 is also provided with a liquid guiding channel 202. The liquid guiding channel 202 connects the opening groove 201 and the sealing cavity 110. The conductive liquid can be added to the sealing cavity 110 through the liquid guiding channel 202, or discharged or replaced in the sealing cavity 110 through the liquid guiding channel 202.

[0030] Furthermore, after the conductive liquid is injected into the sealing cavity 110, in order to seal the liquid guiding channel 202, in some embodiments of the present invention, the bearing 100 further includes a fastener 60, which is fixedly connected to the outer ring 20 and at least partly disposed in the opening groove 201 to close the liquid guiding channel 202. Thus, after the conductive liquid is added, the fastener 60 can be installed in the opening groove 201 to achieve the closure of the liquid guiding channel 202.

[0031] Optionally, fastener 60 can be a screw plug.

[0032] Furthermore, in order to maintain the high-speed operation of the bearing 100, the sealing lip of the first seal 40 is in dynamic contact with the outer wall of the inner ring 10 of the bearing 100. A small amount of conductive liquid may inevitably leak out or a small amount of lubricating oil may enter, potentially reducing conductivity. Therefore, in some embodiments of the present invention, a sealing structure may be provided on the outer ring 20 of the bearing 100, so that after the bearing 100 is assembled, the sealing structure can seal with other components to improve the sealing effect.

[0033] Specifically, in combination Figure 1 , Figure 4 and Figure 7 The outer ring 20 has a first groove and a second groove arranged at intervals along the axial direction of the bearing 100 on its outer wall. An opening groove 201 is located between the first groove and the second groove. The bearing 100 also includes a second seal, which includes a first sealing ring 51 and a second sealing ring 52. A portion of the first sealing ring 51 is located in the first groove, and a portion protrudes from the outer circumferential surface of the outer ring 20. The second sealing ring 52 is located in the second groove, and a portion protrudes from the outer circumferential surface of the outer ring 20. In other words, a pair of annular second seals can be pressed into the annular grooves on both sides of the outer ring 20 of the bearing 100. The sealing rings protruding from the surface of the outer ring 20 facilitate sealing between the outer circumference of the bearing 100 and other components after the bearing 100 is installed, thereby improving the sealing effect.

[0034] In some embodiments of the present invention, the first seal 40 further includes a connecting portion 53 that connects the first sealing ring 51 and the second sealing ring 52 axially, and the connecting portion 53 is disposed around the opening groove 201. Thus, the connecting portion 53, the first sealing ring 51, and the second sealing ring 52 can surround the opening groove 201, sealing the opening groove 201 after the bearing 100 is installed, thereby further preventing leakage or diffusion of conductive fluid.

[0035] Optionally, the first seal 40 may include at least two dynamic seals, which may be the same or different, depending on the actual situation; the second seal 50 may include at least two static seals, which may be the same.

[0036] Combination Figure 1 , Figure 4 and Figure 7 In one embodiment of the present invention, the outer wall of the outer ring 20 of the bearing 100 has an I-shaped groove with a hole at its center, which is a liquid guiding channel 202. The liquid guiding channel 202 can be connected to the sealed cavity 110 between the inner and outer rings 20, which is a channel for extracting and injecting conductive liquid. A second sealing element can be placed in the I-shaped groove, which, when combined with the housing, forms a completely sealed cavity to ensure that the conductive liquid does not flow out and can also play a role in preventing creep. The hole is drilled at the housing, through which the conductive liquid can be injected into the sealed cavity by a syringe. A screw plug is provided at the hole on the housing to facilitate the extraction and refilling of conductive liquid or liquid metal without disassembling the box, thus maintaining the conductivity.

[0037] Combination Figure 3 and Figure 6 In other embodiments of the present invention, the bearing 100 further includes a retaining ring 70, and the conductive component further includes a second conductive component 32. The retaining ring 70 has multiple retaining grooves 71 on its circumferential inner side. The second conductive component 32 is a conductive brush or non-woven fabric. The inner wall of the outer ring 20 has a third groove 103 located on the side of the sealing cavity 110 near the outer periphery of the bearing 100. The second conductive component 32 is pressed into the retaining grooves 71, and the opposite ends of the retaining ring 70 are supported between the inner wall of the inner ring 10 and the third groove 103. Specifically, when the conductive component is solid, the sealing cavity 110 may contain a fixing component, such as the retaining ring 70, for fixing and installing the conductive component. The retaining ring 70 can be used to fix the second conductive component 32, and the third groove 103, located within the sealing cavity 110, can be used to position the retaining ring 70, thereby improving the stability of the solid conductive component after installation and enhancing the overall stability of the bearing 100 structure.

[0038] In other words, in one embodiment of the present invention, the conductive element may include two types of conductive elements: a liquid conductive element and a solid conductive element. Both the solid and liquid conductive elements can be disposed in the sealed cavity 110. In other words, the bearing 100 is configured to be provided with different conductive materials, and the user can replace the conductive material according to the actual use or usage requirements, which can improve the versatility of the bearing 100 in application.

[0039] For example, the conductive material filling the sealed cavity 110 can be used in two ways. One is a conductive electrolyte liquid or a conductive liquid metal, which has been used in other technical solutions. However, when the ambient temperature is too low, the conductive electrolyte solution or liquid metal will lose its conductivity or even solidify, causing the bearing 100 to jam. This is not suitable for cold northern regions. If a heating device is installed, the cost will increase significantly, and the vehicle must not be depressurized to maintain heating, which is extremely detrimental to the vehicle's range. The other is to put conductive brushes made of conductive materials such as carbon fiber or conductive materials such as non-woven fabric into the sealed cavity of the bearing 100. Although the cost is higher, it is suitable for cold northern climate regions.

[0040] Therefore, this application proposes a bearing 100 that is compatible with both nonwoven fabric / conductive brush and conductive liquid: As shown in the figure, the outer wall of the outer ring 20 of the bearing 100 has an II-shaped groove and holes, and the inner wall of the outer ring 20 has a groove. The same sealing ring is used on both sides. Users can choose to use nonwoven fabric / conductive brush or conductive liquid as needed. When using the nonwoven fabric solution, the nonwoven fabric can be fixed in the groove 71 on the inner wall of the outer ring 20 of the bearing 100 by the retaining ring 70, or the nonwoven fabric can be integrated into the retaining ring 70 and installed into the groove 71 together with the retaining ring 70. In this case, the housing does not need to be drilled. When using the conductive liquid solution, holes are drilled at the corresponding housing location, and then the conductive liquid is injected through the holes at the outer ring 20.

[0041] In some embodiments of the present invention, the bearing 100 may also be configured to accommodate only non-liquid conductive materials or solid conductive materials. The bearing 100 further includes a retaining ring 70, which has a plurality of retaining grooves 71 on its circumferential inner side; the conductive element includes a second conductive element 32, which is a conductive brush or non-woven fabric, and the second conductive element 32 is pressed into the retaining grooves 71. The inner wall of the outer ring 20 has a third groove 103, which is located on the side of the sealing cavity 110 near the outer periphery of the bearing 100. The opposite ends of the retaining ring 70 are supported between the inner wall of the inner ring 10 and the third groove 103. In this way, the conductive element can be installed from the outside, which provides convenience for assembly and maintenance.

[0042] Combination Figure 2 In some embodiments of the present invention, the sealing element includes a third sealing ring 43 and a fourth sealing ring 44, which are respectively sealed on opposite sides of the sealing cavity 110 along the axial direction. The fourth sealing ring 44 is located on the side of the sealing cavity 110 near the outer periphery of the bearing 100. The conductive element includes a second conductive element 32, which is a conductive brush or non-woven fabric, and is integrated into the fourth sealing ring 44. Thus, the third sealing ring 43 can be used only for sealing, while the fourth sealing ring 44 can be used for both sealing and mounting the second conductive element 32, facilitating the assembly of the conductive element.

[0043] Specifically, different types of sealing rings are used on both sides of bearing 100, such as... Figure 2 As shown: the inward-facing side is entirely used for sealing, while the outward-facing sealing ring integrates conductive non-woven fabric or a conductive brush, and its structure is as follows. Figure 2 As shown; alternatively, the same sealing ring can be used on both sides, and the non-woven fabric and conductive brush can be pressed separately into the slot 71 through the retaining ring 70, as shown. Figure 3 As shown; within this sealed cavity 110, the conductive material will not be affected by external lubricating oil and can be maintained regularly; the inner wall of the outer ring 20 of the bearing 100 has a groove, where conductive brushes, non-woven fabrics, etc. can be fixed.

[0044] In some embodiments of the present invention, the bearing 100 further includes a retainer 82, which is disposed between the inner ring 10 and the outer ring 20 and on the side of the bearing 100 that is axially away from the first seal 40, and the first seal 40 seals the other end face of the bearing 100 in the axial direction.

[0045] Another object of the present invention is to provide a vehicle that uses the aforementioned bearing 100, which can prevent the bearing 100 from electro-corrosion, thereby extending the electric drive life.

[0046] The bearing 100 of some specific embodiments of the present invention is described below with reference to the accompanying drawings.

[0047] In related technologies, the inner and outer rings of a bearing are annular structures. In this application, the inner ring 10 and outer ring 20 are axially lengthened based on the annular structure. A pair of sealing rings are embedded into the annular grooves on both sides of the outer ring 20 of the bearing 100 by press fitting. At the same time, the sealing lips of the sealing elements are in dynamic contact with the outer wall of the inner ring 10 of the bearing 100, thereby forming a sealed cavity inside the bearing 100. The sealed cavity is filled with a conductive material, which enables the bearing 100 to release the generated common-mode shaft voltage, thereby preventing the bearing 100 from electro-corrosion. The conductive material can be a liquid conductive material such as an electrolyte solution or liquid metal, but it must be a non-polluting and environmentally friendly conductive liquid; it can also be a solid conductive material such as a carbon fiber conductive brush or non-woven fabric. When the bearing 100 adopts a conductive brush / non-woven fabric solution, there is an annular groove on the inner wall of the outer ring 20 of the bearing 100. The non-woven fabric or carbon fiber conductive brush can be integrated into the outer sealing ring. Figure 4 As shown, it can be installed into the groove; or it can be pressed into the groove 71 of the retaining ring 70 and fixed by the retaining ring 70. This solution avoids the reduction in conductivity caused by lubricating oil in conventional conductive brushes. When the bearing 100 adopts a conductive liquid solution, there is an "II"-shaped groove on the outer wall of the outer ring 20 of the bearing 100, and an "II"-shaped rubber seal is placed in the groove. Figure 1As shown, the seal, in conjunction with the outer ring 20 of the bearing 100 and the housing, serves to seal and prevent creep, preventing the conductive liquid from leaking out due to the centrifugal force of the bearing 100 during operation. A hole is present in the I-shaped groove, and a corresponding hole must be drilled in the housing to accommodate it, fitted with a screw plug. The conductive liquid can be injected into the sealing cavity 110 of the bearing 100 through this hole. Because the seal ring is in dynamic contact with the outer wall of the inner ring 10 of the bearing 100, a small amount of lubricating oil may inevitably enter the cavity and a small amount of conductive liquid may leak out after prolonged use, affecting conductivity. Users can perform regular maintenance by extracting the conductive liquid from the sealing cavity 110 of the bearing 100 through the aforementioned hole and replacing the conductive liquid to maintain its conductivity. The conductive liquid can be an electrolyte solution or a liquid metal, but environmental requirements must be observed, and a non-polluting conductive liquid must be used.

[0048] When the conductive liquid / non-woven fabric solution is used in the general bearing 100, such as Figure 5 As shown, the outer ring 20 of bearing 100 has holes and an II-shaped groove on its outer wall, and the inner wall of the outer ring 20 also has a groove 71. Both sides use the same type of sealing ring. Users can freely choose the two schemes according to their actual situation.

[0049] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] 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 with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply 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 that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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 the present invention. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A bearing (100), characterized in that, include: The inner ring (10) and the outer ring (20) are provided with a first protrusion (11) on the outer wall of the inner ring (10) and a second protrusion (21) on the inner wall of the outer ring (20). Multiple balls (81) are rotatably disposed between the inner ring (10) and the outer ring (20); A first sealing element is disposed between the first protrusion (11) and the second protrusion (21) to form a sealing cavity (110); A conductive element is disposed in the sealed cavity (110).

2. The bearing (100) according to claim 1, characterized in that, The outer ring (20) has an opening groove (201) with the opening facing outward on its outer wall. The outer ring (20) also has a liquid guiding channel (202) that connects the opening groove (201) to the sealing cavity (110). The bearing (100) also includes a fastener (60) that is fixedly connected to the outer ring (20) and at least part of it is located in the opening groove (201) to close the liquid guiding channel (202).

3. The bearing (100) according to claim 2, characterized in that, The conductive component includes a first conductive component (31), which is a conductive liquid. The first conductive component (31) is injected into the sealed cavity (110) through the liquid channel (202).

4. The bearing (100) according to claim 2, characterized in that, The outer wall of the outer ring (20) is provided with a first groove and a second groove arranged at intervals along the axial direction of the bearing (100), and the opening groove (201) is provided between the first groove and the second groove; The bearing (100) further includes a second seal, which includes a first sealing ring (51) and a second sealing ring (52). A portion of the first sealing ring (51) is disposed in the first groove and a portion protrudes from the outer peripheral surface of the outer ring (20). The second sealing ring (52) is disposed in the second groove and a portion protrudes from the outer peripheral surface of the outer ring (20).

5. The bearing (100) according to claim 4, characterized in that, The first seal also includes a connecting portion (53) that connects the first sealing ring (51) and the second sealing ring (52) axially, the connecting portion (53) being disposed around the opening groove (201).

6. The bearing (100) according to claim 2, characterized in that, It also includes a retaining ring (70), the conductive element includes a second conductive element (32), the retaining ring (70) has a plurality of retaining grooves (71) on its inner circumferential side; the second conductive element (32) is a conductive brush or non-woven fabric, the inner wall of the outer ring (20) is provided with a third groove (103), the third groove (103) is located on the side of the sealing cavity (110) near the outer periphery of the bearing (100), the second conductive element (32) is pressed into the retaining groove (71), and the opposite ends of the retaining ring (70) are supported between the inner wall of the inner ring (10) and the third groove (103).

7. The bearing (100) according to claim 1, characterized in that, The first sealing element includes a third sealing ring (43) and a fourth sealing ring (44), which are respectively sealed on opposite sides of the sealing cavity (110) along the axial direction. The fourth sealing ring (44) is located on the side of the sealing cavity (110) near the outer periphery of the bearing (100). The conductive element includes a second conductive element (32), which is a conductive brush or non-woven fabric. The second conductive element (32) is integrated into the fourth sealing ring (44).

8. The bearing (100) according to claim 1, characterized in that, It also includes a retaining ring (70), which has multiple retaining grooves (71) on its inner circumferential side; the conductive element includes a second conductive element (32), which is a conductive brush or non-woven fabric, and the second conductive element (32) is pressed into the retaining groove (71); the inner wall of the outer ring (20) is provided with a third groove (103), which is located on the side of the sealing cavity (110) near the outer periphery of the bearing (100); the two ends of the retaining ring (70) are supported between the inner wall of the inner ring (10) and the third groove (103).

9. The bearing (100) according to any one of claims 1-8, characterized in that, It also includes a retainer (82), which is located between the inner ring (10) and the outer ring (20) and is located on the side of the bearing (100) away from the first seal along the axial direction. The first seal seals the other end face of the bearing (100) along the axial direction.

10. A vehicle, characterized in that, Includes the bearing (100) according to any one of claims 1-9.

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