Fiber yarn, fiber bundle, conducting ring, preparation method of conducting ring, motor and vehicle

Abstract

The invention relates to a fiber yarn, a fiber bundle, a conducting ring, a preparation method of the conducting ring, a motor and a vehicle. The fiber yarn comprises a yarn core, a conducting layer and a bundling layer. The conductive layer covers the peripheral surface of the wire core; the bundling layer coats the peripheral surface of the conductive layer, and the bundling layer is a water-soluble material layer; wherein the bundling layer is configured to be connected with the bundling layer of the adjacent fiber filaments. According to the technical scheme, the bundling layer of each fiber is configured to be connected with the bundling layer of the adjacent fiber, so that all the fibers in each fiber bundle can be bundled into a whole, the stiffness of the fiber bundle is improved, the situation that the fiber bundle is prone to deformation when inserted into the ring body assembly is avoided, and the service life of the fiber bundle is prolonged. Therefore, the smoothness of inserting the fiber bundle into the ring body assembly is improved, and the efficiency of fixing the fiber bundle on the ring body assembly can be improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a fiber filament, a fiber bundle, a conductive ring and a preparation method thereof, a motor and a vehicle. Background Art

[0002] Drive motors powered by variable frequency drives utilize pulse-width modulation to control motor speed. The inverter's output current, due to high-frequency switching, induces voltage on the main shaft. As static charge accumulates, the induced voltage on the main shaft reaches a level high enough to penetrate the oil film between the bearing balls. This voltage then discharges through the path of least resistance, causing electrical corrosion on the bearing races, balls, and raceways. This damage manifests itself in blackened grease, spark pitting, electrical corrosion spots, and grooves on the inner and outer raceways of the bearings. These factors shorten the life of the main bearings.

[0003] In addition, when alternating current passes through a conductor, the current density is unevenly distributed across the conductor's cross-section, and the current density decreases with increasing distance from the conductor's surface. Most of the current is concentrated near the conductor's surface, creating a skin effect. Since high-frequency current flows through the conductor's largest surface area, the skin effect becomes more pronounced as the current frequency increases. Accordingly, the resistance of the conductor affected by the skin effect increases. Furthermore, as the motor's power increases, the high-frequency loop current increases exponentially. High-power motors generate extremely high high-frequency loop currents, which pose a greater risk to bearing breakdown.

[0004] To prevent the aforementioned electrical corrosion, the spindle needs to be equipped with a conductive device. In related technologies, conductive rings are primarily used for electrical conduction. These rings effectively regulate shaft voltage and bearing current, protecting the bearings. However, the production efficiency of these rings is relatively low. Summary of the Invention

[0005] The embodiments of the present application provide a fiber filament to improve the production efficiency of the conductive ring, so as to at least solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, a fiber yarn is provided, which includes a fiber core, a conductive layer and a bunching layer; the conductive layer covers the outer peripheral surface of the fiber core; the bunching layer covers the outer peripheral surface of the conductive layer, and the bunching layer is a water-soluble material layer; wherein the bunching layer is configured to be connected to the bunching layer of the fiber yarn adjacent to it.

[0007] Optionally, the fiber filament further includes a reinforcement layer, which is arranged between the conductive layer and the bunching layer, the reinforcement layer covers the outer peripheral surface of the conductive layer, and the bunching layer covers the reinforcement layer; wherein the reinforcement layer is a layer of non-water-soluble material.

[0008] Optionally, the diameter of the wire core is D0, and the thickness of the reinforcement layer is D1, satisfying: 1% D0≤D1≤6% D0.

[0009] Optionally, the reinforcement layer is at least one of the following materials: epoxy resin, polyacrylate, polyurethane, polyetheretherketone, polyphenylene sulfide, polyimide, and polyetherimide.

[0010] Optionally, the diameter of the wire core is D0, the thickness of the bundled layer is D2, and the following relationship is satisfied: 1% D0≤D2≤6% D0.

[0011] Optionally, the bundle layer is at least one of the following materials: water-based epoxy resin, water-based polyacrylate, and water-based polyimide.

[0012] Optionally, the core is carbon fiber, and / or the conductive layer is a metal layer, and the material of the metal layer is at least one of the following materials: copper, nickel, gold, silver, iron, zinc, and aluminum.

[0013] According to a second aspect of the present application, a fiber bundle is provided. The fiber bundle includes a plurality of fiber filaments. The plurality of fiber filaments are arranged in parallel along the radial direction of the fiber filaments, and each bundle layer of fiber filaments is connected to the bundle layer of fiber filaments adjacent thereto.

[0014] According to a third aspect of the present application, a conductive ring is provided, which includes a ring body assembly and the aforementioned fiber bundle, and has a plurality of mounting through holes, the mounting through holes extending radially along the ring body assembly, and the plurality of mounting through holes are arranged at intervals along the circumferential direction of the ring body assembly; part of the fiber bundle is located in the mounting through hole, and one end of the fiber bundle facing the ring body assembly is located outside the ring body assembly.

[0015] Optionally, the ring body assembly includes a ring body and an annular cover plate, a plurality of mounting grooves are provided on one end face of the ring body, the cover plate is connected to the ring body and covers the mounting grooves to form a mounting through hole; a fixed tooth group is provided at the position opposite to the mounting groove, and the fixed tooth group abuts against the fiber bundle.

[0016] Optionally, a flared opening is provided at one end of the mounting through slot away from the axis of the ring body, and the diameter of the flared opening increases as the direction moves away from the axis of the ring body.

[0017] According to the fourth aspect of the present application, a method for preparing a conductive ring is provided, which includes: providing the aforementioned fiber bundle and ring body assembly; the ring body assembly has a plurality of mounting through holes arranged at intervals along its circumference, and the mounting through holes extend radially along the ring body assembly; pushing a plurality of fiber bundles into the plurality of mounting through holes respectively, and the plurality of fiber bundles extend radially along the ring body assembly, and one end of each fiber bundle facing the axis of the ring body assembly is located outside the mounting through groove, and the ring body 21 of the ring body assembly 24 is fixedly connected to the cover plate 22 of the ring body assembly 24; removing the portion of the bundle layer located on the inner ring side of the ring body assembly 24 by water washing.

[0018] Optionally, the aforementioned method for preparing the fiber bundle includes the following contents: plating a conductive layer on the surface of the wire core, and then sizing a bundle layer on the surface of the conductive layer to obtain fiber yarns; integrating multiple fiber yarns into bundles and inserting them into a mold hole, and simultaneously pulling out the multiple fiber yarns in the integrated bundles from the mold hole so that the bundle layer of each fiber yarn is connected to the bundle layer of the fiber yarn adjacent to it.

[0019] Optionally, after plating the conductive layer and before sizing the bunching layer, the preparation method further comprises: sizing the reinforcement layer on the surface of the conductive layer, wherein the bunching layer is sizing on the surface of the reinforcement layer to obtain fiber filaments.

[0020] Optionally, the mass fractions of the conductive layer, the reinforcement layer and the bundle layer are respectively: 20wt% to 80wt%, 0.5wt% to 3wt%, and 0.5wt% to 3wt%.

[0021] Optionally, the surface of the wire core is roughened first, and then a conductive layer is plated on the surface of the wire core.

[0022] According to the fifth aspect of the present application, a motor is provided, which includes a main shaft and a conductive ring obtained by the aforementioned preparation method, the ring body assembly is sleeved on the main shaft, and one end of the fiber bundle facing the axis of the ring body assembly is in contact with the outer peripheral surface of the main shaft.

[0023] According to a sixth aspect of the present application, a vehicle is provided, comprising the aforementioned motor.

[0024] In the fiber filaments of the embodiments of the present application, the above-mentioned technical solution is used to configure the bundle layer of each fiber filament to be connected to the bundle layer of the fiber filaments adjacent to it, so that the individual fiber filaments in each fiber bundle can be bundled into a whole, so as to improve the stiffness of the fiber bundle and avoid the fiber bundle from being easily deformed when inserted into the ring body component, so as to improve the smoothness of the fiber bundle being inserted into the ring body component, and further improve the efficiency of fixing the fiber bundle on the ring body component.

[0025] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0027] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0028] Figure 1 is a schematic diagram of the end surface structure of a fiber filament provided in an exemplary embodiment of the present disclosure;

[0029] Figure 2 is a schematic diagram of the end face structure of a fiber bundle provided in an exemplary embodiment of the present disclosure;

[0030] Figure 3 is a schematic diagram of the end face structure of another fiber filament provided in an exemplary embodiment of the present disclosure;

[0031] Figure 4 is a schematic diagram of the end face structure of another fiber bundle provided in an exemplary embodiment of the present disclosure;

[0032] Figure 5 is a schematic diagram of the angle α provided in an exemplary embodiment of the present disclosure;

[0033] Figure 6 is a schematic structural diagram of a conductive ring provided in an exemplary embodiment of the present disclosure;

[0034] Figure 7 is a schematic diagram of the internal structure of a conductive ring provided in an exemplary embodiment of the present disclosure;

[0035] Figure 8 is a schematic diagram of a partial structure of a cover plate provided in an exemplary embodiment of the present disclosure;

[0036] Figure 9 is a schematic diagram of a partial structure of a ring body provided in an exemplary embodiment of the present disclosure;

[0037] Figure 10 is a schematic flow chart of a method for preparing a conductive ring provided in an exemplary embodiment of the present disclosure;

[0038] Figure 11 is a schematic diagram of pushing a fiber bundle into a mounting slot provided in an exemplary embodiment of the present disclosure;

[0039] Figure 12 is a schematic flow chart of a method for preparing a fiber bundle provided in an exemplary embodiment of the present disclosure;

[0040] Figure 13 is a schematic flow chart of another method for preparing a fiber bundle provided in an exemplary embodiment of the present disclosure;

[0041] Figure 14 is a schematic flow chart of another method for preparing a fiber bundle provided in an exemplary embodiment of the present disclosure;

[0042] Figure 15 FIG. 1 is a schematic diagram of a partial structure of a motor provided in an exemplary embodiment of the present disclosure.

[0043] Description of reference numerals:

[0044] 1-fiber yarn; 11-wire core; 12-conductive layer; 13-reinforcement layer; 14-bundling layer; 15-suspended segment;

[0045] 2-conductive ring; 21-ring body; 211-mounting slot; 212-flaring; 22-cover plate; 221-fixed tooth set; 23-mounting through hole; 24-ring body assembly;

[0046] 3-motor; 31-spindle; 32-housing; 33-rotor assembly;

[0047] 4-Fiber bundles. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0049] Before introducing the fiber filament, fiber bundle and preparation method thereof, conductive ring, motor and vehicle provided in the embodiments of the present application, the relevant technologies of the present application are first introduced.

[0050] In the related art, a conductive ring comprises a ring body assembly and a fiber bundle fixed to the ring body assembly. The ring body assembly comprises a ring body and a cover plate fixed to the ring body. The ring body is provided with a mounting slot for mounting the fiber bundle, which extends radially through the inner and outer circumferences of the ring body. The cover plate is provided with a fixed tooth set that abuts the portion of the fiber bundle located within the mounting slot. The fiber bundle comprises multiple fiber filaments. Due to the insufficient stiffness of the fiber bundle and the size of the hole in the conductive ring that accommodates the fiber bundle, the fiber filaments must be manually threaded into a copper tube sleeve, which is then mounted on the ring body assembly. This results in poor efficiency in inserting the fiber bundle into the ring body assembly. Furthermore, the fiber bundle has a limited number of effective conductive loops, which is not conducive to mitigating the increased conductor resistance caused by the skin effect of high-frequency current. Furthermore, the fiber filaments are not sufficiently stiff to effectively penetrate the oil film, resulting in poor conductivity in oil-cooled motors. In addition, the fiber filaments are easy to fall off during use, and the fallen fiber filaments are easy to mix into the interior of the motor and cause the motor to short-circuit, or the fallen fiber filaments are mixed into the insulating oil and cause the insulating oil to fail.

[0051] Based on this, the embodiments of the present application provide a fiber filament, a fiber bundle, a conductive ring, and a method for preparing the same, as well as a motor and a vehicle. These can increase the number of effective conductive loops in the fiber bundle to mitigate the increased resistance caused by the skin effect of high-frequency current, thereby effectively ensuring the conductive effect. Simultaneously, the stiffness of the fiber bundle can be increased to improve the smoothness of its insertion into the ring assembly, thereby improving the reliability of its fixation to the ring assembly. Furthermore, the stiffness of the fiber filament can be increased to facilitate its penetration of the oil film, ensuring reliable conductivity.

[0052] The following combination Figures 1 to 15 , a fiber filament 1, a fiber bundle 4, a conductive ring 2 and a preparation method thereof, a motor 3 and a vehicle provided in an embodiment of the present application are described in detail.

[0053] See also Figure 1 , Figure 1 Schematic diagram of the end face structure of the fiber filament 1 provided in the exemplary embodiment of the present disclosure. In the first aspect, the embodiment of the present application provides a fiber filament 1. The fiber filament 1 includes a core 11, a conductive layer 12 and a bunching layer 14. The conductive layer 12 covers the outer peripheral surface of the core 11. The bunching layer 14 covers the outer peripheral surface of the conductive layer 12. The bunching layer 14 is a water-soluble material layer. The bunching layer 14 is configured to connect with the bunching layer 14 of the adjacent fiber filament 1, such as Figure 2 As shown, Figure 2 Schematic diagram of the end surface structure of the fiber bundle 4 provided in an exemplary embodiment of the present disclosure.

[0054] It can be understood that the conductive layer 12 can be made of metal to provide a conductive path for the fiber filament 1 to facilitate current transmission in the fiber filament 1.

[0055] It is understood that the core 11 can be made of carbon fiber, which is used to support the conductive layer 12. Due to its size and material, the conductive layer 12 is relatively soft and easily deformed. The core 11 is supported within the conductive layer 12, providing a stable structure and shape for the fiber 1.

[0056] In this embodiment, by providing a bundling layer 14 and configuring the bundling layer 14 of each fiber filament 1 to be connected to the bundling layer 14 of the adjacent fiber filament 1, the individual fiber filaments 1 in each fiber bundle 4 can be bundled into a whole, so as to improve the stiffness of the fiber bundle 4 and avoid the fiber bundle 4 from being easily deformed when inserted into the ring body assembly, so as to improve the smoothness of the fiber bundle 4 being inserted into the ring body assembly, thereby improving the efficiency of fixing the fiber bundle 4 on the ring body assembly.

[0057] At the same time, by setting the bundle layer 14 as a water-soluble material layer, after the fiber bundle 4 formed by bundling the fiber filaments 1 is installed in the ring body assembly to form the conductive ring 2, the bundle layer 14 is removed by washing, so that the fiber filaments 1 are dispersed toward one end of the main shaft 31 of the motor 3, so that each fiber filament 1 can form a conductive loop. In this way, each fiber bundle 4 can have multiple conductive loops, thereby reducing the resistance increase caused by the skin effect of high-frequency current and effectively ensuring the conductive effect.

[0058] Moreover, by setting the bundle layer 14 as a water-soluble material layer, the fiber bundle 4 can be removed by water, so that the softness of the end of the fiber filament 1 that contacts the main shaft 31 of the motor 3 is improved, thereby ensuring that the fiber filament 1 can bend freely without breaking, which is beneficial to improving the service life of the fiber filament 1.

[0059] Furthermore, the use of the bundling layer 14 to bundle the multiple fiber filaments 1 within each fiber bundle 4 into a single unit facilitates the use of mechanical equipment to insert the fiber bundle 4, thereby improving the dimensional consistency and installation position accuracy of the fiber bundle 4 on the conductive ring 2. This allows the length of the fiber bundle 4 to be precisely controlled, thereby increasing the utilization rate of the fiber bundle 4 during the assembly of the conductive ring 2 and reducing waste of the fiber bundle 4 during the preparation process.

[0060] See also Figure 3 , Figure 3 This is a schematic diagram of the end face structure of another fiber filament 1 provided in an exemplary embodiment of the present disclosure. In some embodiments, the fiber filament 1 further includes a reinforcement layer 13. Reinforcement layer 13 is disposed between the conductive layer 12 and the bunching layer 14. Reinforcement layer 13 covers the outer circumference of the conductive layer 12. Bunching layer 14 covers reinforcement layer 13. Reinforcement layer 13 is a layer of a water-insoluble material.

[0061] I understand. Figure 3 The fiber bundle 4 formed by the plurality of fiber filaments 1 is shown in FIG. Figure 4 As shown, Figure 4 3 is a schematic diagram of the end face structure of another fiber bundle 4 provided in an exemplary embodiment of the present disclosure.

[0062] It can be understood that after the fiber bundle 4 formed by bundling multiple fiber filaments 1 is installed on the ring body assembly 24 to form the conductive ring 2, the portion of the fiber bundle 4 located on the inner ring side of the ring body assembly 24 is removed by water washing, so that the fiber filaments 1 are dispersed toward one end of the main shaft 31 of the motor 3. The provision of the reinforcement layer 13 can improve the stiffness of each fiber filament 1. In this way, the reinforcement layer 13 can protect the fiber filaments 1 to improve the wear resistance of the fiber filaments 1, and can also improve the strength of the fiber filaments 1 to reduce the wear and tear caused by the friction between the fiber filaments 1 and the main shaft 31 of the motor 3, to prevent the fiber filaments 1 from falling off and mixing into the motor 3, causing the motor 3 to short-circuit, or to prevent the fiber filaments 1 from falling off and mixing into the insulating oil, causing the insulating oil to fail.

[0063] It is understood that the material of the reinforcement layer 13 can be adjusted according to the usage environment, thereby obtaining fiber filaments 1 of varying stiffness. For example, in an oily environment, a fiber filament 1 of higher stiffness can be used to facilitate effective penetration of the oil film and ensure conductivity. In a dry environment, a fiber filament 1 of lower stiffness can be used to provide the fiber filament 1 with better wear resistance.

[0064] See also Figure 1 or Figure 3 In some embodiments, the diameter of the wire core 11 is D0, and the thickness of the reinforcement layer 13 is D1, satisfying: 1% D0≤D1≤6% D0.

[0065] It can be understood that the thickness D1 of the reinforcement layer 13 includes but is not limited to 1% D0, 1.02% D0, 1.18% D0, 1.45% D0, 1.67% D0, 2.01% D0, 2.33% D0, 2.55% D0, 2.89% D0, 3.22% D0, 3.56% D0, 3.78% D0, 4.01% D0, 4.23% D0, 4.56% D0, 4.98% D0, 5.01% D0, 5.23% D0, 5.56% D0, 5.98% D0, and 6% D0.

[0066] In this embodiment, through the above-mentioned limitations, on the one hand, the strength of the reinforcement layer 13 can be guaranteed, which is conducive to improving the stiffness of the fiber filament 1 so that it can effectively pierce the oil film. On the other hand, the stiffness of the fiber filament 1 can be avoided from being too high, so that the fiber filament 1 can have suitable wear resistance.

[0067] In some embodiments, the reinforcement layer 13 is made of at least one of the following materials: epoxy resin, polyacrylate, polyurethane, polyetheretherketone, polyphenylene sulfide, polyimide, and polyetherimide. Thus, the reinforcement layer 13 has suitable strength and toughness to meet the use requirements of the fiber filament 1.

[0068] Specifically, the wear resistance of the fiber filament 1 provided with the reinforcement layer 13 will be described.

[0069] 1. Test equipment

[0070] The wear resistance of the fiber 1 was tested using an LFY-109B wear tester.

[0071] 2. Test subjects

[0072] Pattern 1: The fiber filament 1 with a diameter of 8.4 μm in the embodiment of the present application includes a fiber core 11 made of carbon fiber with a diameter of 7.5 μm, a conductive layer 12 with a thickness of 0.5 μm, and a reinforcement layer 13 with a diameter of 0.4 μm.

[0073] Pattern 2: A fiber filament 1 with a diameter of 8.4 μm in the related art, comprising a fiber core 11 made of carbon fiber with a diameter of 7.5 μm and a conductive layer 12 with a thickness of 0.9 μm.

[0074] 3. Testing process

[0075] A 50g weight was suspended from one end of fiber filament 1, and the other end was fixed to the abrader. 240-grit sandpaper was fixed to the abrader's friction shaft. The abrader was started, and fiber filament 1 was continuously rubbed against the friction shaft until it broke. The number of abrasions was recorded. Each sample was measured 10 times, and the average value was taken. The result was that, for samples of the same diameter, sample 2 had a number of abrasions of 632, while sample 1 had a number of abrasions of 1625.

[0076] It can be seen from this that the wear resistance of the fiber filament 1 can be improved by providing the reinforcement layer 13 .

[0077] See also Figure 1 or Figure 3 In some embodiments, the diameter of the core wire 11 is D0, and the thickness of the bundle layer 14 is D2, satisfying: 1% D0≤D2≤6% D0.

[0078] It can be understood that the thickness D2 of the bundled layer 14 includes but is not limited to 1% D0, 1.02% D0, 1.18% D0, 1.45% D0, 1.67% D0, 2.01% D0, 2.33% D0, 2.55% D0, 2.89% D0, 3.22% D0, 3.56% D0, 3.78% D0, 4.01% D0, 4.23% D0, 4.56% D0, 4.98% D0, 5.01% D0, 5.23% D0, 5.56% D0, 5.98% D0, and 6% D0.

[0079] In this embodiment, through the above-mentioned limitations, on the one hand, the strength of the clustering layer 14 can be guaranteed, which is conducive to improving the stiffness of the fiber bundle 4 so that it can be quickly pushed into the ring body assembly 24. On the other hand, the thickness of the clustering layer 14 can be controlled, so that the fiber bundle 4 can have a larger number of fiber filaments 1.

[0080] The thickness D1 of the reinforcing layer 13 and the thickness D2 of the bundling layer 14 are exemplarily described below.

[0081] For example, a fiber filament 1 is used for illustration. The diameter of the core 11 of the fiber filament 1 is 7.5 μm, the thickness D3 of the conductive layer is 0.1 μm to 0.8 μm, the thickness D1 of the reinforcement layer is 0.1 μm to 0.4 μm, and the thickness D2 of the bundle layer is 0.1 μm to 0.4 μm.

[0082] In some embodiments, the bundling layer 14 is made of at least one of the following materials: water-based epoxy resin, water-based polyacrylate, and water-based polyimide. This allows the bundling layer 14 to have good water solubility and dispersibility and to be cured or dried at room temperature, thereby improving the forming efficiency of the fiber filaments 1.

[0083] In some embodiments, the core 11 is made of carbon fiber, which can provide an efficient conductive path for the fiber filament 1, effectively reducing energy loss during current transmission, and also improve the strength of the fiber filament 1, making the fiber filament 1 have good tensile and bending resistance.

[0084] In some embodiments, the conductive layer 12 is a metal layer, and the material of the metal layer is at least one of the following materials: copper, nickel, gold, silver, iron, zinc, and aluminum.

[0085] Specifically, a nickel layer may be plated on the wire core 11 , or a nickel layer, a copper layer, and a nickel layer may be plated on the wire core 11 in sequence.

[0086] It is understandable that the material of the conductive layer 12 can be adjusted according to the use environment, so that fiber filaments 1 with different stiffness and conductive efficiency can be obtained.

[0087] See also Figure 2 or Figure 4 In a second aspect, embodiments of the present application further provide a fiber bundle 4. The fiber bundle 4 includes a plurality of fiber filaments 1. The plurality of fiber filaments 1 are arranged side by side along the radial direction of the fiber filaments 1. The bundle layer 14 of each fiber filament 1 is connected to the bundle layer 14 of the adjacent fiber filament 1.

[0088] It can be understood that the fiber bundle 4 includes the above-mentioned fiber filaments 1, and the fiber bundle 4 has all the beneficial effects of the above-mentioned fiber filaments 1, which will not be described in detail in this disclosure.

[0089] In order to facilitate the insertion of the fiber bundle 4 into the ring assembly 24, the stiffness of the fiber bundle 4 is described below. Stiffness refers to the ability of the fiber bundle 4 to overcome gravity.

[0090] Test method for stiffness of fiber bundle 4: Place fiber bundle 4 horizontally, with the front 100 mm suspended to form a suspended section 15, so that the suspended section 15 of fiber bundle 4 droops naturally under the action of gravity. Then test the angle α between the suspended section 15 and the gravity direction G, as shown in the figure. Figure 5 As shown, Figure 5 : is a schematic diagram of the angle α provided in the exemplary embodiment of the present disclosure. It can be understood that the range of the angle α is 0-90 degrees, and the larger the angle α is, the better the ability of the suspended section 15 of the fiber bundle 4 to overcome gravity is, and correspondingly, the stiffness of the fiber bundle 4 is higher. It can be understood that Figure 5 This is a schematic illustration of the angle α. In actual testing, the suspended section 15 may be curved.

[0091] Specifically, before the fiber bundle 4 is washed, the angle α is 60° to 90°; after the fiber bundle 4 is washed, the angle α is 10° to 60°. Among them, when the fiber bundle is used in an oily environment, the fiber bundle 4 after washing needs to have a certain stiffness to pierce the oil film and improve the conductive effect, but it is also necessary to avoid the stiffness of the fiber bundle 4 after washing being too large, which increases the contact force with the shaft and deteriorates the wear resistance. Therefore, the angle α is selected to be 30° to 60°. When the fiber bundle 4 is used in a non-oily environment, the angle α of the fiber bundle 4 after washing is 10° to 30°. At this time, a lower stiffness can be selected to make the fiber bundle 4 after washing obtain better wear resistance.

[0092] See also Figures 6 to 9 In a third aspect, embodiments of the present application provide a conductive ring 2 comprising a ring assembly 24 and a fiber bundle 4. The ring assembly 24 has a plurality of mounting holes 23. The mounting holes 23 extend radially of the ring assembly 24 and are spaced apart circumferentially about the ring assembly 24. A portion of the fiber bundle 4 is positioned within the mounting holes 23, with one end of the fiber bundle 4 facing the ring assembly 24 positioned outside the ring assembly 24.

[0093] It can be understood that the conductive ring 2 includes the above-mentioned fiber bundle 4, and the conductive ring 2 has all the beneficial effects of the above-mentioned fiber bundle 4, which will not be described in detail in this disclosure.

[0094] See also Figure 6 and Figure 7 In some embodiments, the ring assembly 24 includes a ring body 21 and an annular cover plate 22. A plurality of mounting slots 211 are provided on one end surface of the ring body 21. The cover plate 22 is connected to the ring body 21 and covers the mounting slots 211 to form mounting holes 23. A fixed tooth set 221 is provided on the portion of the cover plate 22 opposite the mounting slots 211. The fixed tooth set 221 abuts against the fiber bundle 4.

[0095] See also Figure 9 In some embodiments, a flare 212 is provided at one end of the mounting slot 211 away from the axis of the ring body 21 , and the diameter of the flare 212 increases as the end moves away from the axis of the ring body 21 .

[0096] It can be understood that the expansion opening 212 can be a bell mouth or a hemispherical cavity structure.

[0097] In this embodiment, by providing the flared opening 212 , the fiber bundle 4 can be guided when inserted into the installation slot 211 , thereby improving the smoothness of the insertion of the fiber bundle 4 and facilitating the improvement of the production efficiency of the conductive ring 2 .

[0098] It can be understood that, in addition to providing the bundle layer 14 for the fiber filaments 1 to improve the stiffness of the fiber bundle 4, the size of the port for pushing the fiber bundle 4 into the installation slot 211 is increased in combination with the flaring 212 to further improve the smoothness of the fiber bundle 4 being inserted into the ring assembly, thereby achieving efficient insertion of the fiber bundle 4 into the ring assembly 24. In addition, automated equipment can also be used to achieve the push-in installation of the fiber bundle 4. In this way, not only can the efficiency of installing the fiber bundle 4 in the ring assembly 21 be greatly improved, but the length of the fiber bundle 4 can also be accurately controlled, greatly reducing the waste of the fiber bundle 4 during the preparation of the conductive ring 2, which is conducive to controlling the manufacturing cost of the conductive ring 2.

[0099] See also Figure 10 , Figure 10 : is a flow chart of a method for preparing a conductive ring 2 provided in an exemplary embodiment of the present disclosure. In a fourth aspect, an embodiment of the present application provides a method for preparing a conductive ring 2. The preparation method comprises:

[0100] S100, provide a fiber bundle 4 and a ring body assembly 24, the ring body assembly 24 has a plurality of mounting holes 23 arranged at intervals along its circumference, and the mounting holes 23 extend along the radial direction of the ring body assembly 24; it can be understood that in this step, the ring body 21 of the ring body assembly 24 and the cover plate 22 of the ring body assembly 24 are initially fixed.

[0101] S200, push the plurality of fiber bundles 4 into the plurality of mounting holes 23 respectively. Figure 11 As shown, Figure 11Schematic diagram of a fiber bundle 4 provided in an exemplary embodiment of the present disclosure being pushed into the mounting groove 211. Multiple fiber bundles 4 extend radially along the ring assembly 24 and are spaced apart circumferentially along the ring assembly 24, with one end of each fiber bundle 4 facing the axis of the ring assembly 24 positioned outside the mounting groove 211. The ring body 21 of the ring assembly 24 is fixedly connected to the cover plate 22 of the ring assembly 24, i.e., the bolts fastening the ring body 21 and the cover plate 22 are tightened, or the ring body 21 and the cover plate 22 are riveted together, so that the fixed tooth set 221 on the cover plate 22 compresses the fiber bundle 4.

[0102] S300 , removing the portion of the fiber bundle 4 located on the inner ring side of the ring assembly 24 by water washing, so that the fiber filaments 1 are dispersed toward one end of the main shaft 31 of the motor 3 .

[0103] The structure of the conductive ring 2 obtained is as follows Figure 6 and Figure 7 As shown, Figure 6 is a schematic structural diagram of a conductive ring 2 provided in an exemplary embodiment of the present disclosure, Figure 7 Schematic diagram of the internal structure of the conductive ring 2 provided in an exemplary embodiment of the present disclosure.

[0104] As will be understood, the ring assembly 24 comprises a ring body 21 and an annular cover plate 22. A plurality of mounting slots 211 are provided on one end surface of the ring body 21. The cover plate 22 is connected to the ring body 21 and covers the mounting slots 211 to form mounting holes 23. A fixed tooth set 221 is provided on the portion of the cover plate 22 opposite the mounting slots 211, which abut against the fiber bundle 4.

[0105] The ring body 21 and the cover plate 22 are provided with positioning holes for positioning the relative positions of the ring body 21 and the cover plate 22 , so as to improve the assembly efficiency of the conductive ring 2 .

[0106] The operating steps for installing the fiber bundle 4 in the ring body assembly 24 are as follows: push multiple fiber bundles 4 into the multiple installation grooves 211 of the ring body 21 respectively, and the multiple fiber bundles 4 extend along the radial direction of the ring body 21, and the multiple fiber bundles 4 are arranged at intervals along the circumference of the ring body 21, and the end of each fiber bundle 4 facing the axis of the ring body 21 is located outside the installation groove 211; fix the cover plate 22 to the ring body 21, and make the fixed tooth group 221 on the cover plate 22 abut against the part of the fiber bundle 4 located in the installation groove 211.

[0107] Specifically, the connection process between the ring body 21 and the cover plate 22 includes but is not limited to threaded connection, press-fit riveting, latch connection, and bayonet connection.

[0108] Specifically, the teeth of the fixed tooth set 221 may be wavy teeth, triangular teeth, rectangular teeth, semicircular teeth, continuous planar bosses or other shapes.

[0109] Specifically, both ends of the inner ring and the outer ring of the ring body 21 through the installation groove 211 are chamfered.

[0110] The structure of the fixed tooth group 221 is as follows: Figure 8 As shown, Figure 8 FIG. 2 is a schematic diagram of a partial structure of a cover plate 22 provided in an exemplary embodiment of the present disclosure.

[0111] In this embodiment, through the above-mentioned preparation method, on the one hand, by setting a bundling layer 14 and making the bundling layer 14 of each fiber filament 1 be configured to be connected with the bundling layer 14 of the adjacent fiber filament 1, the individual fiber filaments 1 in each fiber bundle 4 can be bundled into a whole, so as to improve the stiffness of the fiber bundle 4 and avoid the fiber bundle 4 from being easily deformed when inserted into the ring body component, so as to improve the smoothness of the fiber bundle 4 being inserted into the ring body component, and further improve the efficiency of fixing the fiber bundle 4 on the ring body component.

[0112] On the other hand, by washing away the bundle layer 14, the fiber filaments 1 are dispersed toward one end of the main shaft 31 of the motor 3, so that each fiber filament 1 can become a conductive loop. In this way, each fiber bundle 4 can have multiple conductive loops, thereby reducing the resistance increase caused by the skin effect of high-frequency current and effectively ensuring the conductive effect.

[0113] It can be understood that the conductive ring 2 includes the above-mentioned fiber bundle 4, and the conductive ring 2 has all the beneficial effects of the above-mentioned fiber bundle 4, which will not be described in detail in this disclosure.

[0114] It can be understood that the fiber bundle 4 is inserted into the installation groove 211 along the radial direction of the ring body 21 .

[0115] See also Figure 12 , Figure 12 is a schematic flow chart of a method for preparing a fiber bundle 4 provided in an exemplary embodiment of the present disclosure. In some embodiments, the method for preparing the fiber bundle 4 includes the following:

[0116] S101, coating a conductive layer 12 on the surface of the wire core 11;

[0117] S102, then sizing the cluster layer 14 on the surface of the conductive layer 12 to obtain fiber filaments 1;

[0118] S103, after integrating multiple fiber filaments 1 into a bundle, insert it into the mold hole, and simultaneously pull the multiple fiber filaments 1 in the integrated bundle out of the mold hole, so that the bundle layer 14 of each fiber filament 1 is connected to the bundle layer 14 of the fiber filament 1 adjacent to it.

[0119] Exemplarily, a metal layer is plated on the surface of the wire core 11 by electroplating or chemical plating, so that the surface of the wire core 11 is metallized to form the conductive layer 12 .

[0120] After the conductive layer 12 is plated, the bundle layer 14 is sized in a sizing tank. After sizing, the bundled fiber filaments 1 are simultaneously pulled out from the die hole to tighten the fiber filaments 1, thereby obtaining a bundled fiber bundle 4 of a desired diameter.

[0121] In this embodiment, through the above arrangement, the bundle layer 14 can be quickly formed on the surface of the fiber filament 1, and the bundle layer 14 of each fiber filament 1 can be connected to the bundle layer 14 of the adjacent fiber filament 1 as a whole, so as to improve the manufacturing efficiency of the fiber bundle 4.

[0122] See also Figure 13 , Figure 13 is a schematic flow diagram of another method for preparing a fiber bundle 4 provided in an exemplary embodiment of the present disclosure. In some embodiments, after depositing the conductive layer 12 and before sizing the bundle layer 14, the preparation method further includes sizing the reinforcement layer 13 on the surface of the conductive layer 12, wherein the bundle layer 14 is sizing the surface of the reinforcement layer 13 to obtain the fiber filament 1.

[0123] Specifically, the preparation of the aforementioned fiber bundle 4 includes the following:

[0124] S101, coating a conductive layer 12 on the surface of the wire core 11;

[0125] S102a, then sizing the reinforcement layer 13 on the surface of the conductive layer 12;

[0126] S102b, sizing the bundle layer 14 on the surface of the reinforcement layer 13 to obtain fiber filaments 1;

[0127] S103, after integrating multiple fiber filaments 1 into a bundle, insert it into the mold hole, and simultaneously pull the multiple fiber filaments 1 in the integrated bundle out of the mold hole, so that the bundle layer 14 of each fiber filament 1 is connected to the bundle layer 14 of the fiber filament 1 adjacent to it.

[0128] Exemplarily, a metal layer is plated on the surface of the wire core 11 by electroplating or chemical plating, so that the surface of the wire core 11 is metallized to form the conductive layer 12 .

[0129] After the conductive layer 12 is plated, the reinforcement layer 13 is sized in a sizing tank. After sizing, the reinforcement layer 13 is dried, and the resulting filament is rolled up. Next, the filament passes through another sizing tank for sizing the bundle layer 14. After sizing, the bundled fibers 1 are simultaneously pulled out of the die holes to tighten the fibers 1, resulting in a bundled fiber bundle 4 of the desired diameter.

[0130] In some embodiments, the mass fractions of the conductive layer 12 , the reinforcement layer 13 , and the bundle layer 14 are 20 wt % to 80 wt %, 0.5 wt % to 3 wt %, and 0.5 wt % to 3 wt %, respectively.

[0131] It can be understood that the mass fraction of the conductive layer 12 is 20 wt % to 80 wt %, so that the conductive layer 12 can fully ensure that the fiber filaments 1 have good conductive properties.

[0132] The mass fraction of the reinforcement layer 13 is 0.5 wt % to 3 wt %, which can effectively enhance the overall strength of the fiber filament 1 .

[0133] The mass fraction of the clustering layer 14 is 0.5 wt % to 3 wt %, which is beneficial for tightly combining multiple fiber filaments 1 into a whole and controlling the proportion of the clustering layer 14 in the fiber bundle 4 , which is beneficial for the fiber bundle 4 to have more fiber filaments 1 .

[0134] In some embodiments, the surface of the core wire 11 is roughened first, and then the conductive layer 12 is plated on the surface of the core wire 11 .

[0135] Specifically, if Figure 14 As shown, Figure 14 FIG. 4 is a flow chart of a method for preparing another fiber bundle 4 provided in an exemplary embodiment of the present disclosure. The method for preparing the aforementioned fiber bundle 4 includes the following steps:

[0136] S101a, roughening the surface of the silk core 11, for example, by soaking it in acetone, acidic liquid, or alkaline liquid at room temperature, so as to increase the surface roughness of the silk core 11;

[0137] S101, coating a conductive layer 12 on the surface of the wire core 11;

[0138] S102a, then sizing the reinforcement layer 13 on the surface of the conductive layer 12;

[0139] S102b, sizing the bundle layer 14 on the surface of the reinforcement layer 13 to obtain fiber filaments 1;

[0140] S103, after integrating multiple fiber filaments 1 into a bundle, insert it into the mold hole, and simultaneously pull the multiple fiber filaments 1 in the integrated bundle out of the mold hole, so that the bundle layer 14 of each fiber filament 1 is connected to the bundle layer 14 of the fiber filament 1 adjacent to it.

[0141] In this embodiment, through the above arrangement, the bonding area between the core wire 11 and the conductive layer 12 can be increased, so as to improve the reliability of the bonding between the core wire 11 and the conductive layer 12 .

[0142] See also Figure 15 , Figure 15is a schematic diagram of a partial structure of a motor 3 provided in an exemplary embodiment of the present disclosure. In a fifth aspect, embodiments of the present application provide a motor 3. The motor 3 includes a main shaft 31 and a conductive ring 2 obtained by the aforementioned preparation method. The conductive ring 2 is sleeved on the main shaft 31, and the end of the fiber bundle 4 facing the axis of the ring body 21 contacts the outer circumference of the main shaft 31.

[0143] It is understood that the motor 3 further includes a housing 32, a stator assembly and a rotor assembly 33. The rotor assembly 33 is fixed to the main shaft 31 and rotates synchronously with the main shaft 31.

[0144] It can be understood that the motor 3 includes the above-mentioned conductive ring 2, and the motor 3 has all the beneficial effects of the above-mentioned conductive ring 2, which will not be described in detail in this disclosure.

[0145] In a sixth aspect, an embodiment of the present application further provides a vehicle comprising the aforementioned motor 3 .

[0146] The vehicle includes the above-mentioned motor 3 , and the vehicle has all the beneficial effects of the above-mentioned motor 3 , which will not be described in detail in this disclosure.

[0147] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and this disclosure does not make any specific limitations on this.

[0148] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0149] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0150] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0151] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A fiber yarn (1), characterized in that include: Silk core (11); A conductive layer (12) covers the outer peripheral surface of the wire core (11); as well as A cluster layer (14) covers the outer peripheral surface of the conductive layer (12), and the cluster layer (14) is a water-soluble material layer; The bundle layer (14) is configured to be connected to the bundle layer (14) of the fiber filament (1) adjacent thereto.

2. The fiber yarn (1) according to claim 1, characterized in that The fiber filament (1) further includes a reinforcement layer (13), wherein the reinforcement layer (13) is arranged between the conductive layer (12) and the cluster layer (14), the reinforcement layer (13) covers the outer peripheral surface of the conductive layer (12), and the cluster layer (14) covers the reinforcement layer (13); Wherein, the reinforcement layer (13) is a layer of non-water-soluble material.

3. The fiber yarn (1) according to claim 2, characterized in that The diameter of the wire core (11) is D0, and the thickness of the reinforcement layer (13) is D1, which satisfies the following relationship: 1% D0≤D1≤6% D0.

4. The fiber yarn (1) according to claim 2, characterized in that The reinforcement layer (13) is made of at least one of the following materials: epoxy resin, polyacrylate, polyurethane, polyetheretherketone, polyphenylene sulfide, polyimide, and polyetherimide.

5. The fiber yarn (1) according to claim 1, characterized in that The diameter of the filament core (11) is D0, and the thickness of the cluster layer (14) is D2, satisfying the following: 1% D0≤D2≤6% D0.

6. The fiber yarn (1) according to any one of claims 1 to 5, characterized in that The cluster layer (14) is made of at least one of the following materials: water-based epoxy resin, water-based polyacrylate, and water-based polyimide.

7. The fiber yarn (1) according to any one of claims 1 to 5, characterized in that The wire core (11) is carbon fiber, and / or the conductive layer (12) is a metal layer, and the material of the metal layer is at least one of the following materials: copper, nickel, gold, silver, iron, zinc, and aluminum.

8. A fiber bundle (4), characterized in that The invention comprises a plurality of fiber filaments (1), wherein the plurality of fiber filaments (1) are arranged in parallel along the radial direction of the fiber filaments (1), and the bundle layer (14) of each fiber filament (1) is connected to the bundle layer (14) of the adjacent fiber filament (1).

9. A conductive ring (2), characterized in that: include: A ring assembly (24) having a plurality of mounting through holes (23), wherein the mounting through holes (23) extend radially of the ring assembly (24), and the plurality of mounting through holes (23) are spaced apart along the circumference of the ring assembly (24); and According to the fiber bundle (4) according to claim 8, part of the fiber bundle (4) is located in the mounting through hole (23), and one end of the fiber bundle (4) facing the ring body assembly (24) is located outside the ring body assembly (24).

10. The conductive ring (2) according to claim 9, characterized in that: The ring body assembly (24) comprises a ring body (21) and an annular cover plate (22); a plurality of mounting grooves (211) are provided on one end surface of the ring body (21); the cover plate (22) is connected to the ring body (21) and covers the mounting grooves (211) to form the mounting through hole (23); and a fixed tooth group (221) is provided at a portion of the cover plate (22) opposite to the mounting grooves (211); the fixed tooth group (221) abuts against the fiber bundle (4).

11. The conductive ring (2) according to claim 10, characterized in that: A flared opening (212) is provided at one end of the mounting slot (211) away from the axis of the ring body (21), and the diameter of the flared opening (212) increases as the direction moves away from the axis of the ring body (21).

12. A method for preparing a conductive ring (2), characterized in that: include: Provided are a fiber bundle (4) and a ring assembly (24) according to claim 8, wherein the ring assembly (24) has a plurality of mounting holes (23) spaced apart along its circumference, and the mounting holes (23) extend in the radial direction of the ring assembly (24); The plurality of fiber bundles (4) are respectively pushed into the plurality of mounting through holes (23), and the plurality of fiber bundles (4) extend radially along the ring body assembly (24), and one end of each fiber bundle (4) facing the axis of the ring body assembly (24) is located outside the mounting through hole (23); and the ring body (21) of the ring body assembly (24) is fixedly connected to the cover plate (22) of the ring body assembly (24); and the portion of the cluster layer (14) located on the inner ring side of the ring body assembly (24) is removed by water washing.

13. The method for preparing a conductive ring (2) according to claim 12, characterized in that: The method for preparing the fiber bundle (4) according to claim 8 comprises the following contents: A conductive layer (12) is plated on the surface of a wire core (11), and then a sizing cluster layer (14) is applied on the surface of the conductive layer (12) to obtain a fiber filament (1); a plurality of the fiber filaments (1) are bundled together and inserted into a mold hole, and the bundled plurality of the fiber filaments (1) are simultaneously pulled out of the mold hole so that the cluster layer (14) of each fiber filament (1) is connected to the cluster layer (14) of the adjacent fiber filament (1).

14. The method for preparing a conductive ring (2) according to claim 13, characterized in that: After plating the conductive layer (12) and before sizing the cluster layer (14), the preparation method further comprises: sizing a reinforcement layer (13) on the surface of the conductive layer (12), wherein the cluster layer (14) is sizing on the surface of the reinforcement layer (13) to obtain the fiber filament (1).

15. The method for preparing a conductive ring (2) according to claim 14, characterized in that: The mass fractions of the conductive layer (12), the reinforcement layer (13) and the bundle layer (14) are 20 wt% to 80 wt%, 0.5 wt% to 3 wt% and 0.5 wt% to 3 wt% respectively.

16. The method for preparing a conductive ring (2) according to claim 13, characterized in that: First, the surface of the wire core (11) is roughened, and then the conductive layer (12) is plated on the surface of the wire core (11).

17. A motor (3), characterized in that include: spindle (31); And a conductive ring (2) obtained by the preparation method according to any one of claims 12 to 16, wherein the ring body component (24) is sleeved on the main shaft (31), and the end of the fiber bundle (4) facing the axis of the ring body component (24) contacts the outer peripheral surface of the main shaft (31).

18. A vehicle, characterized in that: Comprising the motor (3) as claimed in claim 17.

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