Protective ring and motor

Abstract

A protective ring and a motor. The protective ring comprises a ring body, a cover plate and a plurality of conductive fiber bundles; the ring body is fixedly connected to the cover plate; a plurality of mounting grooves are formed on the surface of the ring body facing the cover plate; the mounting grooves are distributed at intervals in the circumferential direction of the ring body; each mounting groove passes through the inner ring of the ring body in the radial direction of the ring body; a conductive fiber bundle is fixed in each mounting groove; the conductive fiber bundles extend toward the center of the ring body and extend out of the mounting groove so as to be in contact with a motor shaft; a plurality of fixing tooth groups are protrudingly provided on the surface of the cover plate facing the ring body; the fixing tooth groups are used to fix the conductive fiber bundles in the mounting grooves.

Description

Protective ring and motor

[0001] Priority information and cross-references

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on July 31, 2023, with application number 202322057833.9 and application name “Protective Ring and Motor”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of motors, and in particular to a protective ring and a motor having the protective ring. Background Art

[0004] To prevent electrical corrosion in motor bearings, which can affect their performance and service life, a protective ring is typically installed on the motor shaft. This ring is used to ground the shaft voltage generated on the motor shaft, preventing it from corroding the motor bearings. The protective ring contacts the outer circumference of the motor shaft through a conductive fiber bundle, directing current away from the shaft.

[0005] However, the conductive fiber bundle fixing structure of the existing protective ring is usually a single-point fixing, and the effective contact area between the conductive fiber bundle and the ring body is small, resulting in poor conductivity between the conductive fiber bundle and the ring body, thereby weakening the protective effect on the motor bearing.

[0006] Summary of the Invention

[0007] To address the above issues, the present application provides a protective ring capable of improving the electrical conductivity between the conductive fiber bundle and the ring body. The present application also provides a motor having the protective ring. Specifically, the following solutions are included.

[0008] The present application provides a protective ring, which includes a ring body, a cover plate and multiple conductive fiber bundles. The ring body is fixedly connected to the cover plate. A plurality of mounting grooves are provided on the surface of the ring body facing the cover plate. The mounting grooves are arranged at intervals along the circumference of the ring body. Each mounting groove penetrates the inner ring of the ring body along the radial direction of the ring body. A conductive fiber bundle is fixed in each mounting groove, and each conductive fiber bundle extends out of the mounting groove toward the center of the ring body for contact with the motor shaft; a plurality of fixed tooth groups are protruding from the surface of the cover plate facing the ring body, and the fixed tooth groups are used to fix the conductive fiber bundle in the mounting groove.

[0009] The protective ring provided by the present application is provided with a ring body and a cover plate, so that the protective ring has a split structure, so as to facilitate the processing and manufacturing of the protective ring while ensuring the conductive effect of the protective ring, thereby reducing the difficulty of manufacturing the protective ring. By providing a mounting groove on the ring body, the conductive fiber bundle can be installed in the mounting groove to achieve the effect of accommodating and positioning each conductive fiber bundle. At the same time, by providing each mounting groove to penetrate the inner ring of the ring body along the radial direction of the ring body, the conductive fiber bundle fixed in each mounting groove can at least partially extend out of the ring body from the inner ring, and then the conductive fiber bundle can be extended to form contact with the outer peripheral surface of the motor shaft at one end, thereby achieving the conductive effect, so as to conduct the current on the motor shaft out of the motor shaft, thereby reducing the shaft voltage on the motor shaft, and avoiding the undesirable phenomenon of electrical corrosion of the motor bearings caused by excessive shaft voltage on the motor shaft.

[0010] The protective ring provided by the present application is provided with a fixed tooth group on the surface of the cover plate facing the ring body, and the position of the fixed tooth group is aligned with the installation groove, so that when the cover plate is fixedly connected to the ring body, the fixed tooth group can extend into the installation groove and form an extrusion effect on the conductive fiber bundle installed in the installation groove, which can increase the effective contact area between the conductive fiber bundle and the surface of the ring body, and then increase the conductive effect between the conductive fiber bundle and the ring body, so as to improve the protective effect on the motor bearing. At the same time, by providing a fixed tooth group to squeeze the corresponding conductive fiber bundle, the conductive fiber bundle can be fixed in the installation groove, thereby avoiding the situation where the conductive fiber bundle may be displaced along the radial direction of the ring body and cause poor contact with the motor shaft, that is, it can further improve the conductive fiber bundle's effect of conducting current on the motor shaft.

[0011] In one embodiment, the position of the fixed tooth group is aligned with the mounting slot, and at least two fixed teeth are arranged in the fixed tooth group at intervals.

[0012] In this embodiment, at least two fixed teeth are provided at intervals corresponding to each mounting groove, and the at least two fixed teeth squeeze the conductive fiber bundle from different positions along the radial direction of the ring body, thereby ensuring the effective contact area between the entire conductive fiber bundle and the ring body, thereby further improving the conductive effect between the conductive fiber bundle and the ring body, and further improving the protective effect of the protective ring provided by this application on the motor bearing, thereby improving the performance and effect of the protective ring provided by this application.

[0013] In one embodiment, the cover plate and the ring body are both made by mold forming.

[0014] In this embodiment, the cover plate and the ring body are separately manufactured by die forming, which can improve the conductive effect of the guard ring while reducing the difficulty of the manufacturing process of the guard ring and improving the manufacturing accuracy of the guard ring.

[0015] In one embodiment, in a cross section perpendicular to the radial direction of the protection ring, the cross-sectional area of ​​the fixing teeth located in the installation groove is 5% to 30% of the cross-sectional area of ​​the installation groove.

[0016] In this embodiment, the larger the cross-sectional area of ​​the fixed teeth relative to the cross-sectional area of ​​the mounting slot, the greater the degree of compression applied to the corresponding conductive fiber bundle when inserted into the mounting slot, i.e., the greater the degree of compression applied to the conductive fiber bundle. By setting the cross-sectional area of ​​the fixed teeth to 5% to 30% of the cross-sectional area of ​​the mounting slot, the degree of compression applied by the fixed teeth to the conductive fiber bundle can be limited. This ensures that the fixed teeth compress the conductive fiber bundle and increases the effective contact area between the conductive fiber bundle and the ring body, while preventing the fixed teeth from compressing the conductive fiber bundle excessively, thereby causing the conductive fiber bundle to be squeezed and deformed by the fixed teeth, potentially breaking.

[0017] In one embodiment, the fixing teeth abut and press the conductive fiber bundle along the thickness direction of the guard ring.

[0018] In this embodiment, fixing teeth are provided along the thickness of the guard ring to abut and compress the conductive fiber bundle. This allows the fixing teeth to simultaneously compress and secure the conductive fiber bundle during the process of securing the cover plate to the ring body. This ensures that the fixing teeth maintain a secure and secure grip on the conductive fiber bundle while also improving ease of installation between the cover plate and the ring body, thereby increasing the efficiency of guard ring installation.

[0019] In one embodiment, along the circumference of the protective ring, each fixing tooth in the same mounting groove is close to the same side wall of the mounting groove, and each fixing tooth presses and abuts against the other side wall of the mounting groove.

[0020] In this embodiment, by arranging the fixing teeth in the same mounting groove close to the same side wall of the mounting groove, the fixing teeth in the same mounting groove can squeeze the conductive fiber bundle from the same direction after extending into the mounting groove, so as to further increase the effective contact area between the conductive fiber bundle and the side wall of the mounting groove, thereby improving the conductive effect and conductive efficiency between the conductive fiber bundle and the ring body.

[0021] In one embodiment, along the circumference of the guard ring, the cross-sectional shape of the fixed teeth is any one of a wave shape, a sawtooth shape, an arc shape, or a straight line shape.

[0022] In one embodiment, along the radial direction of the protection ring, the cross-sectional shape of the mounting groove is at least one of a rectangle, an arc, a circle, a trapezoid, and a triangle.

[0023] In one embodiment, along the radial direction of the ring body, the distance between the inner ring and the outer ring of the ring body is greater than the extension length of the mounting groove.

[0024] In this embodiment, by setting the distance between the inner and outer rings of the ring body to be greater than the extension length of the mounting groove, the mounting groove has the effect of not completely penetrating the inner and outer rings of the ring body, that is, the mounting groove is closed at the end away from the inner ring. This allows the conductive fiber bundles to be positioned in the radial direction of the ring body, thereby improving the installation effect and installation accuracy of the conductive fiber bundles and ensuring that each conductive fiber bundle extends an equal distance from the inner ring. At the same time, by forming a closed effect at the end of the mounting groove away from the inner ring, the displacement of the conductive fiber bundles in the radial direction of the ring body can be limited, further securing the conductive fiber bundles in the radial direction of the ring body, ensuring contact between the conductive fiber bundles and the outer peripheral surface of the motor shaft, and further improving the conductive effect and efficiency of the conductive fiber bundles.

[0025] In one embodiment, the mounting groove extends through the outer ring of the ring body along the radial direction of the ring body; the cover plate is provided with a limiting tooth corresponding to each mounting groove, and the limiting tooth is used to support and limit the radial displacement of the conductive fiber bundle away from the center direction of the ring body.

[0026] In this embodiment, by providing a mounting groove extending through the outer ring of the ring body, the difficulty of manufacturing the mounting groove can be reduced, and the manufacturing precision and efficiency of the mounting groove can be improved. By providing the fixing teeth located along the radial direction of the ring body, away from the inner circumference of the conductive fiber bundle, as limiting teeth, and providing the limiting teeth to abut and limit the radial displacement of the conductive fiber bundle, the limiting teeth can achieve the effect of fixing and limiting the conductive fiber bundle in the radial direction of the ring body, that is, can limit the displacement of the conductive fiber bundle in the radial direction of the ring body, thereby improving the working efficiency and working performance of the conductive fiber bundle.

[0027] In one embodiment, the protective ring includes a plurality of fixing members, which are arranged at intervals along the circumference of the protective ring, and each fixing member is located between two mounting grooves; along the thickness direction of the protective ring, each fixing member is used to fix the cover plate and the ring body.

[0028] In this embodiment, the provision of fixings enables a secure connection between the cover plate and the ring body. Furthermore, the fixed connection between the cover plate and the ring body by the fixings improves the assembly accuracy and efficiency of the guard ring while reducing the difficulty of assembling the cover plate and the ring body. By positioning each fixing between two mounting slots, the mounting slots effectively secure the conductive fiber bundles and enhance the structural strength of the guard ring. By providing individual fixings that extend through the cover plate and are secured to the ring body, the structural strength of the guard ring can be further enhanced.

[0029] In one embodiment, a plurality of mounting holes are provided on the cover plate, and the mounting holes penetrate the cover plate along the thickness direction of the protective ring. The plurality of mounting holes are arranged at intervals along the circumference of the protective ring, and the position of each mounting hole corresponds to the position between the two mounting grooves of the ring body. Each fixing member extends into a mounting hole and is fixed to the ring body.

[0030] In one embodiment, a countersunk groove is formed at one end of the mounting hole away from the ring body, and along the axial direction of the protective ring, the cross-sectional area of ​​the mounting hole is smaller than the cross-sectional area of ​​the countersunk groove.

[0031] In one embodiment, along the thickness direction of the protective ring, each fixing member penetrates the cover plate and the ring body simultaneously.

[0032] In one embodiment, a positioning hole is provided on the surface of the ring body facing the cover plate, and a positioning post is correspondingly provided on the surface of the cover plate facing the ring body. The positioning post extends into the positioning hole to position the ring body and the cover plate.

[0033] In this embodiment, by providing positioning holes and positioning posts, and by the cooperation between the positioning holes and the positioning posts, a positioning effect can be formed on the ring body and the cover plate during the installation process of the ring body and the cover plate, so as to ensure that the fixing teeth on the cover plate can be aligned with the installation groove, thereby improving the assembly accuracy and assembly efficiency between the fixing teeth and the installation groove, and reducing the assembly difficulty between the ring body and the cover plate.

[0034] In one embodiment, a positioning post is provided on the surface of the cover plate facing the ring body, and a positioning hole is provided on the surface of the ring body facing the cover plate. The positioning post extends into the positioning hole to position the ring body and the cover plate.

[0035] In one embodiment, each conductive fiber bundle includes a plurality of sub-fibers, and the outer surface of each sub-fiber is coated with a conductive coating, and the conductive coating is used to conduct electricity between any two adjacent sub-fibers.

[0036] In this embodiment, a conductive coating is applied to the outer surface of each sub-fiber so that each sub-fiber can conduct electricity to each other, thereby improving the overall conductive efficiency and conductive effect of each conductive fiber bundle.

[0037] The present application also provides a motor, comprising a motor shaft and a protective ring as in any of the above embodiments, wherein the protective ring is sleeved on the periphery of the motor shaft, and the conductive fiber bundle of the protective ring is in contact with the outer peripheral surface of the motor shaft.

[0038] In this embodiment, by providing a protective ring to divert the current on the motor shaft, the shaft voltage of the motor shaft can be reduced, preventing the shaft voltage of the motor shaft from exceeding the threshold voltage of the lubricating oil of the motor bearing, thereby causing the motor bearing to suffer from the adverse phenomenon of electrical corrosion.

[0039] Because the motor provided in the present application uses the guard ring in any of the above embodiments, the motor provided in the present application has all possible beneficial effects of the guard ring in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0041] FIG1 is a schematic diagram of a working scenario of a motor provided in this application;

[0042] FIG2 is a schematic structural diagram of a protective ring of the motor provided by the present application from a side perspective in the embodiment shown in FIG1 ;

[0043] FIG3 is a schematic structural diagram of the protection ring of the motor provided by the present application from another side of the embodiment shown in FIG1 ;

[0044] FIG4 is a schematic structural diagram of the protection ring of the motor provided by the present application from another side perspective in the embodiment shown in FIG1 ;

[0045] FIG5 is a schematic diagram of the cross-sectional structure of the guard ring in the embodiment shown in FIG4 at the AA position from a side perspective;

[0046] FIG6 is a schematic cross-sectional view of the protective ring at the BB position from a side perspective in the embodiment shown in FIG4 ;

[0047] FIG7 is a schematic structural diagram of the embodiment shown in FIG6 when the conductive fiber bundle is installed in the installation groove of the ring body from a side perspective;

[0048] FIG8 is a schematic structural diagram of the protective ring from one side of the ring body in the embodiment shown in FIG7 ;

[0049] FIG9 is a schematic cross-sectional view of the ring body at the DD position from one side of the embodiment shown in FIG8 ;

[0050] FIG10 is a schematic structural diagram of a possible embodiment in which a conductive fiber bundle is installed in a mounting groove of a ring body from a side perspective;

[0051] FIG11 is a schematic cross-sectional view of the guard ring at the CC position from a side perspective in the embodiment shown in FIG4 ;

[0052] FIG12 is a schematic structural diagram of the cover plate from one side of the embodiment shown in FIG11 ;

[0053] FIG13 is a schematic planar structural diagram of the cover plate in another perspective of the embodiment shown in FIG11 ;

[0054] FIG14 is a schematic cross-sectional view of the cover plate of the guard ring in the embodiment shown in FIG13 at a side angle of view at position EE;

[0055] FIG15 is a schematic structural diagram of a fixed tooth on a cover plate from a side perspective in a possible embodiment;

[0056] FIG16 is a schematic diagram of the cross-sectional structure of a neutron fiber in a conductive fiber bundle in a possible embodiment. DETAILED DESCRIPTION

[0057] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0058] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application include direct and indirect connections (couplings) unless otherwise specified. The directional terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. It should be noted that the terms "first," "second," and so on, in the specification, claims, and accompanying drawings of this application are used to distinguish between different objects, not to describe a specific order. Furthermore, the terms "include," "may include," "comprise," or "may include" as used in this application indicate the presence of the corresponding functions, operations, components, etc. disclosed, and do not limit the presence or absence of one or more additional functions, operations, components, etc. Furthermore, the terms "include" or "comprising" indicate the presence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0061] Please refer to Figure 1, which is a schematic diagram of the working scene of the motor 100 provided in this application. As shown in Figure 1, the motor 100 provided in this application includes a motor shaft 101, a motor bearing 102, a motor housing 103, and a protective ring 10. The motor shaft 101 is used to output power, the motor bearing 102 is used to fix the motor shaft 101 in the motor housing 103 and enable the motor shaft 101 to rotate around its own axis, the protective ring 10 is sleeved on the periphery of the motor shaft 101, and the conductive fiber bundle 13 of the protective ring 10 is in contact with the outer peripheral surface of the motor shaft 101 and is used to derive the current on the motor shaft 101.

[0062] Specifically, in the embodiment shown in Figure 1, the outer ring of the motor bearing 102 is fixed on the motor housing 103, and the motor shaft 101 extends into the inner ring of the motor bearing 102 and is fixedly connected to the inner ring of the motor bearing 102, so as to fix the motor shaft 101 in the motor housing 103 and enable the motor shaft 101 to rotate around its own axis, thereby realizing the power output function of the motor 100 provided in this application.

[0063] The protection ring 10 is fixed to the periphery of the motor shaft 101 and contacts the outer circumference of the motor shaft 101 through a conductive fiber bundle 13 (see FIG. 2 ), thereby conducting the current on the motor shaft 101 away.

[0064] When the motor shaft 101 rotates about its own axis, a shaft voltage is generated on the motor shaft 101. At this time, if the shaft voltage on the motor shaft 101 exceeds the breakdown threshold of the lubricating oil, the shaft voltage will break down the oil film formed by the lubricating oil, and may cause partial discharge between the balls and the inner surface of the motor bearing 102, resulting in electro-corrosion grooves on the inner surface of the motor bearing 102, that is, electro-corrosion of the motor bearing 102, thereby affecting the working performance and working efficiency of the motor bearing 102, and may cause the motor bearing 102 to become stuck.

[0065] By setting a protective ring 10 to be sleeved on the periphery of the motor shaft 101 and conducting the current on the motor shaft 101 through the conductive conductive fiber bundle 13, the shaft voltage on the motor shaft 101 is reduced, avoiding the adverse phenomenon of electrical corrosion of the motor bearing 102, thereby forming a protective effect on the motor bearing 102.

[0066] For example, in one possible embodiment, when a shaft voltage is generated on the motor shaft 101, the shaft current on the motor shaft 101 flows into the guard ring 10 through the conductive fiber bundle 13, and then flows from the guard ring 10 to the motor housing 103 fixedly connected to the guard ring 10. At this time, the motor housing 103 can be, but is not limited to, grounded, thereby achieving the effect of releasing the current conducted to the motor housing 103 into the ground, thereby achieving the effect of releasing the shaft voltage on the motor shaft 101 into the ground.

[0067] In other words, the protective ring 10 is fixed to the periphery of the motor shaft 101, and each conductive fiber bundle 13 is arranged to contact the outer peripheral surface of the motor shaft 101, so that a conductive effect can be formed between the conductive fiber bundle 13 and the motor shaft 101, so as to conduct the current on the motor shaft 101 out of the motor shaft 101, thereby reducing the shaft voltage on the motor shaft 101, and avoiding the adverse phenomenon of electrical corrosion of the motor bearing 102 due to excessively high shaft voltage on the motor shaft 101.

[0068] It should be noted that the embodiment shown in FIG1 is merely an example of one possible embodiment of the motor 100, illustrating the possible layout positions of the various functional components within the motor 100. However, the actual structure of the motor 100 and its functional components provided herein is not limited to this embodiment. That is, in other embodiments of the present application, the actual layout positions and structural dimensions of the motor 100 and its functional components can be adjusted based on actual design requirements, and this application does not impose specific limitations on this.

[0069] Please refer to Figures 2 to 4. Figure 2 is a structural schematic diagram of the protective ring 10 of the motor 100 provided by the present application in the embodiment shown in Figure 1 from one side perspective, Figure 3 is a structural schematic diagram of the protective ring 10 of the motor 100 provided by the present application in the embodiment shown in Figure 1 from another side perspective, and Figure 4 is a structural schematic diagram of the protective ring 10 of the motor 100 provided by the present application in the embodiment shown in Figure 1 from yet another side perspective.

[0070] As shown in Figures 2 to 4, the protective ring 10 includes a ring body 11, a cover plate 12 and a plurality of conductive fiber bundles 13. The ring body 11 is fixedly connected to the cover plate 12. The plurality of conductive fiber bundles 13 are all fixed in the protective ring 10, and the plurality of conductive fiber bundles 13 are arranged at intervals along the circumference of the protective ring 10.

[0071] At least a portion of each conductive fiber bundle 13 extends out of the inner ring 11a of the ring body 11, such that the conductive fiber bundle 13 extends out of the ring body 11 and is able to contact the outer circumferential surface of the motor shaft 101. In other words, each conductive fiber bundle 13 extends out of the ring body 11 toward the inner ring 11a of the ring body 11 and contacts the outer circumferential surface of the motor shaft 101.

[0072] By providing the ring body 11 and the cover plate 12 , the protection ring 10 forms a split structure, so as to facilitate the processing and manufacturing of the protection ring 10 while ensuring the conductive effect of the protection ring 10 and reducing the manufacturing difficulty of the protection ring 10 .

[0073] By setting a plurality of conductive fiber bundles 13 fixed inside the protective ring 10, and the plurality of conductive fiber bundles 13 are arranged at intervals along the circumference of the protective ring 10, it is ensured that the conductive fiber bundles 13 can evenly contact the outer peripheral surface of the motor shaft 101, ensuring the conductive effect of the conductive fiber bundles 13 on the motor shaft 101, and improving the protective effect of the protective ring 10 on the motor bearing 102.

[0074] As shown in FIG16 , in one embodiment, each conductive fiber bundle 13 includes a plurality of sub-fibers 131. The outer surface of each sub-fiber 131 is coated with a conductive coating 132. The conductive coating 132 is used to conduct electricity between any two adjacent sub-fibers 131. By coating the outer surface of each sub-fiber 131 with the conductive coating 132, each sub-fiber 131 can conduct electricity to each other, thereby improving the overall conductive efficiency and conductive effect of each conductive fiber bundle 13.

[0075] In one embodiment, the cover plate 12 and the ring body 11 are both formed by die molding. In this embodiment, the cover plate 12 and the ring body 11 are formed separately by die molding, which can reduce the manufacturing process difficulty of the protection ring 10 and improve the manufacturing accuracy of the protection ring 10.

[0076] Please refer to Figure 5, which is a schematic cross-sectional view of the protective ring 10 of the embodiment shown in Figure 4, taken from a side perspective at position AA. As shown in Figure 5, in one embodiment, the protective ring 10 includes a plurality of fixing members 14, which are arranged at intervals along the circumference of the protective ring 10, with each fixing member 14 positioned between two mounting grooves 111. Each fixing member 14 is used to secure the cover plate 12 and the ring body 11 along the thickness direction of the protective ring 10.

[0077] Specifically, as shown in Figure 5, the cover plate 12 is provided with a plurality of mounting holes 121, which extend through the cover plate 12 along the thickness of the protective ring 10. The plurality of mounting holes 121 are arranged at intervals along the circumference of the protective ring 10, and each mounting hole 121 is located at a position corresponding to a position between two mounting grooves 111 of the ring body 11.

[0078] The number of fixing members 14 is the same as the number of mounting holes 121. That is, each fixing member 14 corresponds to a mounting hole 121, and each fixing member 14 extends into a mounting hole 121 and is fixed to the ring body 11, thereby achieving a fixed connection between the cover plate 12 and the ring body 11.

[0079] In the embodiment shown in FIG5 , there are four fixing members 14 . The four fixing members 14 are spaced apart and arranged symmetrically around the circumference of the guard ring 10 , thereby evenly securing the ring body 11 and the cover plate 12 , ensuring uniform structural strength at all locations of the guard ring 10 , and improving the performance and service life of the guard ring 10 .

[0080] By providing the fixing member 14, a fixed connection between the cover plate 12 and the ring body 11 can be achieved. At the same time, the fixing member 14 can improve the assembly accuracy and efficiency of the protective ring 10 and reduce the difficulty of assembling the cover plate 12 and the ring body 11.

[0081] By positioning each fixing member 14 between two mounting grooves 111, the mounting grooves 111 can ensure the mounting and securing effect of the conductive fiber bundle 13, and improve the structural strength of the protective ring 10. By positioning each fixing member 14 through the cover plate 12 and fixed to the ring body 11, the structural strength of the protective ring 10 can be further improved.

[0082] In a possible embodiment, the fixing member 14 may be, but is not limited to, a structural member such as a rivet or a pressure riveting column, so as to achieve a pressure riveting connection effect between the ring body 11 and the cover plate 12 .

[0083] As shown in Figure 5, in one possible embodiment, a countersunk groove 121a is defined at one end of mounting hole 121, facing away from ring body 11. Along the axial direction of guard ring 10, the cross-sectional area of ​​mounting hole 121 is smaller than the cross-sectional area of ​​countersunk groove 121a. When fastener 14 extends into mounting hole 121 and is secured to ring body 11, countersunk groove 121a can accommodate any excess material deformation of fastener 14.

[0084] It should be noted that in the embodiment shown in FIG5 , only four fixing members 14 are used as an example for illustrative purposes, but the number of fixing members 14 used to fix the cover plate 12 and the ring body 11 is not limited to only four. The number of fixing members 14 can be adjusted according to actual design requirements or structural strength requirements, and this embodiment of the application does not specifically limit this.

[0085] Meanwhile, in the embodiment shown in FIG. 5 , only the example of the fixing member 14 penetrating the cover plate 12 along the thickness direction of the protective ring 10 is used for illustrative description, but the fixing member 14 is not limited to only being able to penetrate the cover plate 12 .

[0086] For example, in a possible embodiment, along the thickness direction of the protective ring 10 , each fixing member 14 may also penetrate the cover plate 12 and the ring body 11 at the same time.

[0087] Please refer to Figure 6, which is a schematic cross-sectional view of the protective ring 10 at position BB in the embodiment shown in Figure 4. As shown in Figure 6, in one embodiment, the surface of the ring body 11 facing the cover plate 12 is provided with a positioning hole 122, and the surface of the cover plate 12 facing the ring body 11 is provided with a corresponding positioning post 112. The positioning post 112 extends into the positioning hole 122 to position the ring body 11 and the cover plate 12.

[0088] Specifically, as shown in FIG. 6 , a positioning post 112 is protruded from the surface of the ring body 11 facing the cover plate 12 and is arranged to avoid the mounting groove 111 and the position of the fixing member 14 .

[0089] A positioning hole 122 is defined on the surface of the cover plate 12 facing the ring body 11 , and is engaged with the positioning post 112 . The positioning hole 122 extends from the surface of the cover plate 12 facing the ring body 11 to the surface of the cover plate 12 facing away from the ring body 11 .

[0090] The number of the positioning holes 122 is equal to the number of the positioning posts 112 , and each positioning hole 122 is correspondingly provided to a positioning post 112 , so that each positioning post 112 can extend into a positioning hole 122 to achieve a positioning effect.

[0091] The positioning hole 122 may completely penetrate the cover plate 12 along the thickness direction of the guard ring 10, or may partially penetrate the cover plate 12. In other words, along the thickness direction of the guard ring 10, the penetration length of the positioning hole 122 may be, but is not limited to, equal to the extension length of the positioning post 112, or may be greater than the extension length of the positioning post 112.

[0092] It can be understood that by setting the positioning hole 122 and the positioning column 112, and through the cooperation between the positioning hole 122 and the positioning column 112, the ring body 11 and the cover plate 12 can be positioned during the installation process of the ring body 11 and the cover plate 12, so as to ensure that the fixing teeth 123 on the cover plate 12 (please refer to Figure 11) can be aligned with the installation groove 111, thereby improving the assembly accuracy and assembly efficiency between the fixing teeth 123 and the installation groove 111, and reducing the assembly difficulty between the ring body 11 and the cover plate 12.

[0093] It should be noted that FIG6 illustrates only one possible embodiment of positioning holes 122 and positioning posts 112, and does not limit the structural positions, dimensions, and other aspects of positioning holes 122 and positioning posts 112 in this application to this embodiment. In other words, the positions, dimensions, and other aspects of positioning holes 122 and positioning posts 112 can be adjusted based on actual design requirements, and this application does not impose specific limitations on these aspects.

[0094] For example, in a possible embodiment, a positioning column 112 is provided on a surface of the cover plate 12 facing the ring body 11 , and a positioning hole 122 is provided on a surface of the matching ring body 11 facing the cover plate 12 .

[0095] Further, please refer to Figures 7 and 8. Figure 7 is a schematic diagram of the structure of the conductive fiber bundle 13 installed in the mounting groove 111 of the ring body 11 in the embodiment shown in Figure 6, as viewed from one side. Figure 8 is a schematic diagram of the structure of the ring body 11 of the protective ring 10 in the embodiment shown in Figure 7, as viewed from one side. As shown in Figures 7 and 8, the surface of the ring body 11 facing the cover plate 12 is provided with a plurality of mounting grooves 111, each of which is spaced apart along the circumference of the ring body 11.

[0096] Each mounting groove 111 penetrates the inner ring 11 a of the ring body 11 along the radial direction of the ring body 11 , and a conductive fiber bundle 13 is fixed in each mounting groove 111 .

[0097] That is, the number of mounting grooves 111 on the surface of the ring body 11 facing the cover plate 12 is the same as the number of the conductive fiber bundles 13, and each conductive fiber bundle 13 is correspondingly installed in a mounting groove 111, so that the mounting groove 111 can form a receiving effect for the conductive fiber bundle 13 and can avoid position for the fixed connection between the ring body 11 and the cover plate 12.

[0098] It is understandable that by providing the mounting grooves 111 on the ring body 11 , the conductive fiber bundles 13 can be installed in the mounting grooves 111 , so as to achieve the effect of accommodating and positioning each conductive fiber bundle 13 .

[0099] At the same time, by setting each mounting groove 111 to penetrate the inner ring 11a of the ring body 11 along the radial direction of the ring body 11, the conductive fiber bundle 13 fixed in each mounting groove 111 extends out of the mounting groove 111 toward the center of the ring body 11, so that the extended end of the conductive fiber bundle 13 can form contact with the outer peripheral surface of the motor shaft 101, thereby achieving the conductive effect.

[0100] The center of the ring body 11 can be understood as the geometric center of the cross-section of the ring body 11 in the axial direction, and can also be understood as the axis of the ring body 11 .

[0101] Please refer to Figure 9, which is a schematic cross-sectional view of the ring body 11 at position DD in the embodiment shown in Figure 8. As shown in Figure 9, in one embodiment, along the radial direction of the guard ring 10, the cross-sectional shape of the mounting groove 111 can be, but is not limited to, at least one of a rectangle, an arc, a circle, a trapezoid, and a triangle.

[0102] That is, the cross-sectional shape of the mounting groove 111 can be any one of a rectangle, an arc, a circle, a trapezoid, and a triangle, or a shape formed by a combination of multiple shapes of rectangle, arc, circle, trapezoid, and triangle.

[0103] Specifically, as shown in FIG9( a ), the cross-sectional shape of the mounting groove 111 may be a combination of a circle and a trapezoid.

[0104] As shown in FIG. 9 ( b ) to ( d ), the cross-sectional shape of the mounting groove 111 may be any one of a trapezoidal shape, a partial circular shape, and a rectangular shape.

[0105] It should be noted that the embodiment shown in FIG9 merely illustrates possible embodiments of the cross-sectional shape of the mounting groove 111, but does not limit the cross-sectional shape of the mounting groove 111 to this embodiment. In other embodiments of the present application, the cross-sectional shape and cross-sectional dimensions of the mounting groove 111 can be adjusted based on actual design requirements or the cross-sectional shape of the conductive fiber bundle 13 along its own axis, and this application does not impose specific limitations on this.

[0106] Please refer to Figure 10, which is a schematic diagram of the structure of a possible embodiment, shown from a side perspective, when the conductive fiber bundle 13 is installed in the mounting groove 111 of the ring body 11. As shown in Figure 10, in one embodiment, along the radial direction of the ring body 11, the distance between the inner ring 11a and the outer ring 11b of the ring body 11 is greater than the extended length of the mounting groove 111.

[0107] 10 , along the radial direction of the ring body 11 , there is a spacing distance W1 between the inner ring 11a and the outer ring 11b of the ring body 11. The mounting groove 111 extends from the inner ring 11a toward the outer ring 11b and has an extension length W2.

[0108] The spacing distance W1 is greater than the extension length W2. That is, the mounting groove 111 does not completely penetrate from the inner ring 11a to the outer ring 11b. When the conductive fiber bundle 13 is installed in the mounting groove 111, the end surface of the conductive fiber bundle 13 facing away from the motor shaft 101 abuts against the wall of the mounting groove 111 facing the motor shaft 101, thereby limiting the conductive fiber bundle 13.

[0109] It can be understood that by setting the distance between the inner ring 11a and the outer ring 11b of the ring body 11 to be greater than the extension length W2 of the installation groove 111, the installation groove 111 forms an effect of not completely penetrating the inner ring 11a and the outer ring 11b of the ring body 11, that is, the installation groove 111 forms a closed effect at the end away from the inner ring 11a, so that the conductive fiber bundle can be positioned along the radial direction of the ring body 11, so as to improve the installation effect and installation accuracy of the conductive fiber bundle 13, and ensure that each conductive fiber bundle 13 can extend an equal distance from the inner ring 11a.

[0110] At the same time, by forming a closed effect at one end of the mounting groove 111 away from the inner ring 11a, the radial displacement of the conductive fiber bundle 13 along the ring body 11 can be limited, so as to further form a fixing effect on the conductive fiber bundle 13 along the radial direction of the ring body 11, thereby ensuring the contact effect between the conductive fiber bundle 13 and the outer peripheral surface of the motor shaft 101, and further improving the conductive effect and conductive efficiency of the conductive fiber bundle 13.

[0111] Please refer to Figures 11 to 13. Figure 11 is a schematic cross-sectional view of the protective ring 10 at the CC position in the embodiment shown in Figure 4 from one side, Figure 12 is a schematic view of the cover plate 12 from one side, and Figure 13 is a schematic plan view of the cover plate 12 from another side. As shown in Figures 11 to 13, the surface of the cover plate 12 facing the ring body 11 at least partially contacts each conductive fiber bundle 13, securing the conductive fiber bundle 13 within the mounting groove 111.

[0112] Specifically, a plurality of fixing tooth groups 123 a are protruded from the surface of the cover plate 12 facing the ring body 11 . The fixing tooth groups 123 a are used to fix the conductive fiber bundle 13 in the installation groove 111 .

[0113] 12 and 13 , each fixed tooth group 123a is aligned with one mounting slot 111. Each fixed tooth group 123a is provided with at least two fixed teeth 123 at intervals, that is, at least two fixed teeth 123 form one fixed tooth group 123a.

[0114] In other words, the plurality of fixed tooth groups 123a are sequentially spaced apart along the circumference of the cover plate 12, and each fixed tooth group 123a extends radially along the cover plate 12. Each fixed tooth group 123a is positioned corresponding to a mounting slot 111, so that the fixed teeth 123 in each fixed tooth group 123a can extend into the mounting slot 111 to abut against the fiber bundle 13, thereby securing the fiber bundle 13 in the mounting slot 111.

[0115] Each fixed tooth group 123a is provided with at least two fixed teeth 123 spaced apart along the radial direction of the cover plate 12, and at least two fixed teeth 123 can extend into the corresponding mounting groove 111, and abut and squeeze the conductive fiber bundle 13 installed in the mounting groove 111 to fix the corresponding conductive fiber bundle 13.

[0116] It can be understood that by arranging fixed teeth 123 on the surface of the cover plate 12 facing the ring body 11, and arranging the position of the fixed teeth 123 to be aligned with the mounting groove 111, when the cover plate 12 is fixedly connected to the ring body 11, the fixed teeth 123 can extend into the mounting groove 111 and form a squeezing effect on the conductive fiber bundle 13 installed in the mounting groove 111, which can increase the effective contact area between the conductive fiber bundle 13 and the surface of the ring body 11, thereby improving the conductive effect between the conductive fiber bundle 13 and the ring body 11 to improve the protection effect of the motor bearing 102.

[0117] By providing at least two fixed teeth 123 spaced apart corresponding to each mounting groove 111, at least two fixed teeth 123 squeeze the conductive fiber bundle 13 from different positions along the radial direction of the ring body 11, thereby ensuring the effective contact area between the entire conductive fiber bundle 13 and the ring body 11, so as to further improve the conductive effect between the conductive fiber bundle 13 and the ring body 11, and further improve the protective effect of the protective ring 10 provided in this application on the motor bearing 102, thereby improving the performance and use effect of the protective ring 10 provided in this application.

[0118] In the embodiment shown in FIG. 11 , the fixing teeth 123 abut and press the conductive fiber bundle 13 along the thickness direction of the protection ring 10 .

[0119] The fixing teeth 123 are arranged to abut and squeeze the conductive fiber bundle 13 along the thickness direction of the protective ring 10 , so that during the process of fixed connection between the cover plate 12 and the ring body 11 , the fixing teeth 123 can simultaneously form an effect of squeezing and fixing the conductive fiber bundle 13 .

[0120] That is, while ensuring the fixing and squeezing effect of the fixing teeth 123 on the conductive fiber bundle 13 , the installation convenience between the cover plate 12 and the ring body 11 is improved, thereby improving the installation efficiency of the protective ring 10 .

[0121] In one embodiment, along the circumference of the protective ring 10 , each fixing tooth 123 in the same mounting slot 111 is close to the same side wall of the mounting slot 111 , and each fixing tooth 123 presses and presses against the other side wall of the mounting slot 111 .

[0122] By arranging the fixing teeth 123 in the same mounting groove 111 along the same side wall close to the mounting groove 111, the fixing teeth 123 in the same mounting groove 111 can squeeze the conductive fiber bundle 13 from the same direction after extending into the mounting groove 111, so as to further increase the effective contact area between the conductive fiber bundle 13 and the side wall of the mounting groove 111, thereby improving the conductive effect and conductive efficiency between the conductive fiber bundle 13 and the ring body 11.

[0123] At the same time, it can be understood that when the fixing teeth 123 corresponding to the same mounting groove 111 extend into the mounting groove 111, the conductive fiber bundle 13 is squeezed in the same direction along the circumference of the protective ring 10, so that a larger contact surface can be formed between the fixing teeth 123 and the conductive fiber bundle 13, and the fixing teeth 123 can evenly squeeze various positions of the conductive fiber bundle 13, and avoid the undesirable phenomenon that the conductive fiber bundle 13 is deformed or even broken due to excessive pressure of the fixing teeth 123 on the conductive fiber bundle 13.

[0124] In one embodiment, in a cross section perpendicular to the radial direction of the protective ring 10, the cross-sectional area of ​​the fixed tooth set 123a located in the mounting groove 111 is 5% to 30% of the cross-sectional area of ​​the mounting groove 111. The cross-sectional area can be understood as the cross-sectional area perpendicular to the extending direction of the fiber bundle 13.

[0125] It can be understood that the larger the cross-sectional area of ​​the fixing tooth 123 is relative to the cross-sectional area of ​​the mounting slot 111 , the greater the compression on the corresponding conductive fiber bundle 13 when it extends into the mounting slot 111 , that is, the greater the degree of compression on the conductive fiber bundle 13 .

[0126] By setting the cross-sectional area of ​​the fixed teeth 123 to 5% to 30% of the cross-sectional area of ​​the mounting groove 111, the degree of compression of the conductive fiber bundle 13 by the fixed teeth 123 can be limited. This ensures that the fixed teeth 123 compress the conductive fiber bundle 13 and increases the effective contact area between the conductive fiber bundle 13 and the ring body 11, while avoiding the undesirable phenomenon that the conductive fiber bundle 13 is squeezed and deformed by the fixed teeth 123 and may break due to excessive compression of the conductive fiber bundle 13 by the fixed teeth 123.

[0127] Please refer to Figure 14, which is a schematic cross-sectional view of the cover plate 12 of the guard ring 10 at position EE in the embodiment shown in Figure 13. As shown in Figure 14, in one embodiment, the cross-sectional shape of the fixed teeth 123 along the circumference of the guard ring 10 can be, but is not limited to, any of wavy, sawtooth, arcuate, or straight lines.

[0128] In one embodiment, along the extension direction of each fiber bundle 13 , the cross-sectional width of the fixing teeth 123 is less than or equal to the cross-sectional width of the corresponding mounting slot 111 , so as to ensure that the fixing teeth 123 can extend into the corresponding mounting slot 111 .

[0129] Please refer to Figure 15, which is a schematic structural diagram of a possible embodiment of the fixing teeth 123 on the cover plate 12 from a side view. As shown in Figure 15, in one embodiment, along the radial direction of the ring body 11, the mounting groove 111 extends through the outer ring 11b of the ring body 11.

[0130] The cover plate 12 is provided with a limiting tooth 1231 corresponding to each mounting slot 111 . The limiting tooth 1231 is used to resist and limit the radial displacement of the conductive fiber bundle 13 away from the center direction of the ring body 11 .

[0131] Exemplarily, along the radial direction of the ring body 11, the limiting tooth 1231 is located at the end of the fixed tooth group 123a away from the motor shaft 101 along the radial direction of the ring body 11, and the limiting tooth 1231 is used to resist and limit the radial displacement of the conductive fiber bundle 13 away from the center direction of the ring body 11.

[0132] In other words, a limiting tooth 1231 is provided corresponding to each mounting groove 111, and the limiting tooth 1231 is located along the radial direction of the ring body 11 at the end of the conductive fiber bundle 13 away from the motor shaft 101, and the surface of the limiting tooth 1231 facing the motor shaft 101 is in contact with the surface of the conductive fiber bundle 13 away from the motor shaft 101.

[0133] By providing the installation groove 111 penetrating the outer ring 11 b of the ring body 11 , the manufacturing difficulty of the installation groove 111 can be reduced, and the manufacturing accuracy and efficiency of the installation groove 111 can be improved.

[0134] By setting a limiting tooth 1231 and setting the surface of the limiting tooth 1231 facing the motor shaft 101 to fit with the surface of the conductive fiber bundle 13 away from the motor shaft 101, the limiting tooth 1231 can form a fixing and limiting effect on the conductive fiber bundle 13 along the radial direction of the ring body 11, that is, it can limit the displacement of the conductive fiber bundle 13 along the radial direction of the ring body 11, thereby improving the working efficiency and working performance of the conductive fiber bundle 13.

[0135] The conductive fiber bundle fixing structure of the existing protective ring is usually a single-point fixing, and the effective contact area between the conductive fiber bundle and the ring body is small, resulting in poor conductivity between the conductive fiber bundle and the ring body, reducing the protective effect on the motor bearing.

[0136] The protective ring 10 provided in the present application is provided with fixed teeth 123 on the surface of the cover plate 12 facing the ring body 11, and the position of the fixed teeth 123 is aligned with the installation groove 111, so that when the cover plate 12 and the ring body 11 are fixedly connected, the fixed teeth 123 can extend into the installation groove 111 and form a squeezing effect on the conductive fiber bundle 13 installed in the installation groove 111, which can increase the effective contact area between the conductive fiber bundle 13 and the surface of the ring body 11, and further improve the conductive effect between the conductive fiber bundle 13 and the ring body 11, thereby improving the protective effect of the motor shaft 101.

[0137] At the same time, by setting the fixed teeth 123 to squeeze the corresponding conductive fiber bundle 13, the conductive fiber bundle 13 can be fixed in the installation groove 111 to avoid the conductive fiber bundle 13 from being displaced radially along the ring body 11 and causing poor contact with the motor shaft 101, that is, the conductive fiber bundle 13 can further improve the current extraction effect on the motor shaft 101.

[0138] By providing at least two fixed teeth 123 spaced apart corresponding to each mounting groove 111, at least two fixed teeth 123 squeeze the conductive fiber bundle 13 from different positions along the radial direction of the ring body 11, thereby ensuring the effective contact area between the entire conductive fiber bundle 13 and the ring body 11, so as to further improve the conductive effect between the conductive fiber bundle 13 and the ring body 11, and further improve the protective effect of the protective ring 10 provided in this application on the motor bearing 102, thereby improving the performance and use effect of the protective ring 10 provided in this application.

[0139] Furthermore, because the motor 100 provided in the present application uses the guard ring 10 in any of the above embodiments, the motor 100 provided in the present application has all possible beneficial effects of the guard ring 10 in any of the above embodiments.

[0140] It should be understood that the terms "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of this application, "plurality" means two or more, unless otherwise specifically defined.

[0141] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations 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 any one or more embodiments or examples.

[0142] It should be understood that the application of this application is not limited to the above examples. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the scope of protection of the claims appended to this application. Those skilled in the art will understand that implementing all or part of the processes of the above embodiments and making equivalent changes in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A protective ring (10), characterized in that: The protective ring (10) comprises a ring body (11), a cover plate (12) and a plurality of conductive fiber bundles (13); the ring body (11) is fixedly connected to the cover plate (12); a plurality of mounting grooves (111) are provided on a surface of the ring body (11) facing the cover plate (12); the mounting grooves (111) are arranged at intervals along the circumference of the ring body (11); each mounting groove (111) penetrates an inner ring (11a) of the ring body (11) along the radial direction of the ring body (11); a conductive fiber bundle (13) is fixed in each mounting groove (111); and each conductive fiber bundle (13) faces the center of the ring body (11) and extends out of the mounting groove (111) so as to contact the motor shaft (101); A plurality of fixing tooth groups (123a) are protrudingly provided on the surface of the cover plate (12) facing the ring body (11), and the fixing tooth groups (123a) are used to fix the conductive fiber bundle (13) in the installation groove (111).

2. The protective ring (10) according to claim 1, characterized in that The position of the fixed tooth group (123a) is aligned with the installation groove (111), and at least two fixed teeth (123) are arranged at intervals in the fixed tooth group (123a).

3. The protective ring (10) according to claim 1 or 2, characterized in that: The cover plate (12) and the ring body (11) are both manufactured by means of mold forming.

4. The protection ring (10) according to any one of claims 1 to 3, characterized in that: On a cross section perpendicular to the radial direction of the protection ring (10), the cross-sectional area of ​​the fixed tooth (123) located in the installation groove (111) is 5% to 30% of the cross-sectional area of ​​the installation groove (111).

5. The protection ring (10) according to any one of claims 1 to 4, characterized in that: The fixed teeth (123) abut against and press the conductive fiber bundle (13) along the thickness direction of the protective ring (10).

6. The protection ring (10) according to any one of claims 1 to 5, characterized in that: Along the circumference of the protective ring (10), each of the fixing teeth (123) in the same mounting groove (111) is close to the same side wall of the mounting groove (111), and each of the fixing teeth (123) presses and presses against the other side wall of the mounting groove (111) to hold the conductive fiber bundle (13).

7. The guard ring (10) according to any one of claims 1 to 6, characterized in that: Along the circumference of the protection ring (10), the cross-sectional shape of the fixed teeth (123) is any one of a wave shape, a sawtooth shape, an arc shape, or a straight line shape.

8. The protection ring (10) according to any one of claims 1 to 7, characterized in that: Along the radial direction of the protection ring (10), the cross-sectional shape of the installation groove (111) is at least one of a rectangle, an arc, a circle, a trapezoid, and a triangle.

9. The protection ring (10) according to any one of claims 1 to 8, characterized in that: Along the radial direction of the ring body (11), the distance between the inner ring (11a) and the outer ring (11b) of the ring body (11) is greater than the extension length of the installation groove (111).

10. The protection ring (10) according to any one of claims 1 to 9, characterized in that: Along the radial direction of the ring body (11), the mounting groove (111) penetrates to the outer ring (11b) of the ring body (11); The cover plate (12) is provided with a limiting tooth (1231) corresponding to each of the installation grooves (111), and the limiting tooth (1231) is used to resist and limit the radial displacement of the conductive fiber bundle (13) away from the center direction of the ring body (11).

11. The protection ring (10) according to any one of claims 1 to 10, characterized in that: The protective ring (10) comprises a plurality of fixing members (14), wherein the plurality of fixing members (14) are arranged at intervals along the circumference of the protective ring (10), and each of the fixing members (14) is located between two of the mounting grooves (111); Along the thickness direction of the protective ring (10), each of the fixing members (14) is used to fix the cover plate (12) and the ring body (11).

12. The guard ring (10) according to claim 11, characterized in that The cover plate (12) is provided with a plurality of mounting holes (121), the mounting holes (121) penetrate the cover plate (12) along the thickness direction of the protective ring (10), the plurality of mounting holes (121) are arranged at intervals along the circumference of the protective ring (10), and the position of each mounting hole (121) corresponds to the position between the two mounting grooves (111) of the ring body (11), and each fixing member (14) extends into one mounting hole (121) and is fixed to the ring body (11).

13. The guard ring (10) according to claim 12, characterized in that A countersunk groove (121a) is provided at one end of the mounting hole (121) away from the ring body (11); along the axial direction of the protective ring (10), the cross-sectional area of ​​the mounting hole (121) is smaller than the cross-sectional area of ​​the countersunk groove (121a).

14. The guard ring (10) according to any one of claims 1 to 13, characterized in that: A positioning hole (122) is provided on the surface of the ring body (11) facing the cover plate (12), and a positioning column (112) is correspondingly provided on the surface of the cover plate (12) facing the ring body (11); and / or a positioning column (112) is provided on the surface of the cover plate (12) facing the ring body (11), and a positioning hole (122) is provided on the surface of the ring body (11) facing the cover plate (12), and the positioning column (112) extends into the positioning hole (122) to position the ring body (11) and the cover plate (12).

15. The guard ring (10) according to any one of claims 1 to 14, characterized in that: Each of the conductive fiber bundles (13) comprises a plurality of sub-fibers (131), the outer surface of each of the sub-fibers (131) being coated with a conductive coating (132), the conductive coating (132) being used to conduct any two adjacent sub-fibers (131).

16. A motor (100), characterized in that: It comprises a motor shaft (101) and a protective ring (10) as claimed in any one of claims 1 to 15, wherein the protective ring (10) is sleeved on the periphery of the motor shaft (101), and the conductive fiber bundle (13) of the protective ring (10) is in contact with the outer peripheral surface of the motor shaft (101).

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