Conductive monofilament, conductive fiber, conductive ring assembly, and motor
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-01-30
- Publication Date
- 2026-08-13
Smart Images
Figure CN2026076144_13082026_PF_FP_ABST
Abstract
Description
Conductive monofilament, conductive fiber, conductive ring assembly and motor
[0001] Cross-reference to Related Applications
[0002] The present application claims priority to the Chinese patent application No. 202510130734.X, filed on February 5, 2025, and entitled "Conductive monofilament, conductive fiber, conductive ring assembly and motor", the whole content of which is incorporated herein by reference. TECHNICAL FIELD
[0003] The present disclosure relates to the technical field of conductive ring, in particular to a conductive monofilament, a conductive fiber, a conductive ring assembly and a motor. BACKGROUND
[0004] In the field of new energy vehicle motor, the trend of vehicle motor is developing towards higher and higher power. The problem of bearing electric corrosion caused by shaft voltage is becoming more and more serious. The conductive ring is set to be composed of a conductive fiber bundle and a metal shell. The conductive fiber is in interference contact with the motor shaft, the metal shell is in pressure contact with the conductive fiber, and the metal shell is grounded. Therefore, a low impedance path is established in the motor system, which can effectively lead away the shaft current, thereby protecting the motor bearing.
[0005] However, with the rapid development of new energy vehicles, the speed of new energy vehicle motor is getting higher and higher. At high speed of the motor shaft, the conductive fiber of the conductive ring is worn against the motor shaft, which requires higher wear resistance of the conductive fiber. In addition, the conductive ring is installed on the motor, and it is free of replacement and maintenance during the whole life cycle of the motor or even the whole vehicle. Therefore, the wear resistance of the conductive fiber is crucial.
[0006] DISCLOSURE
[0007] The present disclosure aims to at least solve one of the technical problems existing in the prior art. To this end, the present disclosure proposes a conductive monofilament. The lubricating substance added in the conductive monofilament has good lubricating effect, which can enhance the wear resistance of the conductive monofilament, play a lubricating role when the conductive monofilament moves relative to other mechanisms, and reduce the friction and wear of the conductive monofilament.
[0008] The present disclosure further proposes a conductive fiber.
[0009] The present disclosure further proposes a conductive ring assembly.
[0010] The present disclosure further proposes a motor.
[0011] A conductive monofilament according to a first aspect of this disclosure includes: a core layer comprising carbon fiber filaments; a metal layer covering the outer periphery of the core layer; an outer layer covering the outer periphery of the metal layer, the outer layer comprising resin; and a lubricating substance disposed within the metal layer and / or the outer layer.
[0012] According to the embodiments of the present disclosure, adding a lubricating substance to the conductive monofilament has a good lubrication effect, which can enhance the wear resistance of the conductive monofilament, and play a lubricating role when the conductive monofilament moves relative to other mechanisms, thereby reducing the friction and wear of the conductive monofilament.
[0013] According to some embodiments of this disclosure, the coefficient of friction of the lubricating substance is μ, and μ satisfies the relationship: 0.04≤μ≤0.1.
[0014] According to some embodiments of this disclosure, the lubricating substance is a layered two-dimensional material.
[0015] According to some embodiments of this disclosure, the lubricating material includes one or more of graphite, molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene, and hexagonal boron nitride.
[0016] According to some embodiments of this disclosure, the metal layer includes one or more of copper, nickel, gold, silver, zinc, and aluminum.
[0017] According to some embodiments of this disclosure, the metal layer is one or more layers.
[0018] According to some embodiments of this disclosure, the outer layer includes one or more of epoxy resin, polyacrylate, polyurethane, polyphenylene ether ketone, polyamide, polyimide, and phenoxy resin.
[0019] The conductive fiber according to a second aspect of the present disclosure includes: a conductive sleeve; and a plurality of conductive monofilaments according to any embodiment of the first aspect of the present disclosure, wherein the plurality of conductive monofilaments are disposed within the conductive sleeve.
[0020] According to some embodiments of this disclosure, a plurality of the conductive monofilaments are bonded inside the conductive sleeve by conductive adhesive.
[0021] A conductive ring assembly according to a third aspect of this disclosure includes: a body having a fiber hole radially formed therein; and a conductive fiber disposed within the fiber hole, with at least one end of the conductive fiber extending out of the fiber hole.
[0022] According to some embodiments of this disclosure, the body includes a receiving ring and a pressing ring, the receiving ring being connected to the pressing ring to form a fiber pore between the receiving ring and the pressing ring.
[0023] According to some embodiments of this disclosure, the receiving ring is provided with a fiber groove in the radial direction, and the pressure ring is provided with a serrated portion in the radial direction, the serrated portion abutting against the conductive fiber.
[0024] The motor according to a fourth aspect of the present disclosure includes: a housing; a rotating shaft; and a conductive ring assembly according to any embodiment of a third aspect of the present disclosure, the conductive ring assembly being connected to the housing, the rotating shaft being rotatably disposed within the conductive ring assembly, and the conductive fibers being slidably electrically contacting the outer peripheral surface of the rotating shaft.
[0025] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description
[0026] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0027] Figure 1 is a schematic cross-sectional view of a conductive monofilament according to an embodiment of the present disclosure.
[0028] Figure reference numerals: 10, conductive monofilament; 11, core layer; 12, metal layer; 13, outer layer. Detailed Implementation
[0029] The embodiments of this disclosure are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.
[0030] This disclosure discloses a conductive monofilament 10, a conductive fiber including the conductive monofilament 10, a conductive ring assembly including the conductive fiber, and a motor including the conductive ring assembly.
[0031] The conductive monofilament 10 according to an embodiment of the present disclosure is described below with reference to FIG1. As shown in FIG1, the conductive monofilament 10 includes a core layer 11, a metal layer 12, and an outer layer 13. Specifically, the metal layer 12 covers the outer periphery of the core layer 11, and the outer layer 13 covers the outer periphery of the metal layer 12, that is, the metal layer 12 is disposed between the core layer 11 and the outer layer 13, and the metal layer 12 enables the conductive monofilament 10 to have good conductivity.
[0032] The core layer 11 is made of carbon fiber filaments; the metal layer 12 gives the conductive monofilament 10 better conductivity; and the outer layer 13 includes resin.
[0033] The conductive monofilament 10 also includes a lubricating substance that lubricates surfaces in relative motion to reduce wear or abrasion. The lubricating substance can be a solid lubricant, which has a wide operating temperature range, high load-bearing capacity, good anti-stick and anti-slip properties, high vacuum resistance, radiation resistance, a wide conductivity range, corrosion resistance, and dust resistance.
[0034] During friction, the lubricating material and the surrounding medium undergo physical and chemical reactions with the friction surface to generate a solid lubricating film, which reduces friction and wear. Adding lubricating material to the conductive monofilament 10 has a good lubricating effect, enhances the wear resistance of the conductive monofilament 10, and plays a lubricating role when the conductive monofilament 10 moves relative to other mechanisms, reducing friction and wear of the conductive monofilament 10.
[0035] In some embodiments, the lubricant can be disposed within the metal layer 12. That is, the lubricant can be added within the metal layer 12, so that when the metal layer 12 wears off during friction between the conductive monofilament 10 and other structures, the lubricant can be located between the friction surface of the conductive monofilament 10 and other structures, providing a good lubrication effect and enhancing the wear resistance of the conductive monofilament 10.
[0036] The lubricating material can be a dry solid lubricant. Dry solid lubricants have a layered structure with parallel atomic bonds and small interlayer spacing. They do not change their aggregation state during use, such as graphite, molybdenum disulfide, and boron nitride. This type of lubricant has excellent pressure resistance, heat resistance, and lubrication properties. It can form a highly adhesive film on the metal surface, lubricating the friction surface of the conductive monofilament 10 when it is compressed with other structures.
[0037] In addition, lubricants can be salts, such as inorganic compounds like chlorides and phosphates. These chlorine- and phosphorus-containing substances have activating properties and, at certain temperatures, can react chemically with the chemical elements on the metal surface to form a chemical reaction film of phosphides or chlorides on the contact surface. This film has anti-sticking and anti-friction properties, and its strength is much greater than that of chemically or physically adsorbed films.
[0038] In some embodiments, the lubricating material may be disposed within the outer layer 13. During the friction between the conductive monofilament 10 and other structures, when the resin wears off, the lubricating material may be located between the friction surface of the conductive monofilament 10 and other structures. The lubricating material has a good lubrication effect and can enhance the wear resistance of the conductive monofilament 10.
[0039] In some embodiments, the friction coefficient of the lubricating substance is μ, where μ satisfies the relationship: 0.04 ≤ μ ≤ 0.1. Specifically, the friction coefficient of the lubricating substance is between 0.04 and 0.1. If the friction coefficient is less than 0.04, the friction coefficient is too small, the coating performance on the metal surface is too poor, and it cannot be integrated with the metal layer 12; if the friction coefficient is greater than 0.1, the lubricating effect of the lubricating substance is poor.
[0040] Furthermore, the lubricant is a layered two-dimensional material, such as graphite, molybdenum disulfide, or boron nitride, with a layered structure in which atomic bonds are parallel and the spacing between layers is small, so that the aggregation state does not change during use. This lubricant has excellent pressure resistance, heat resistance, and lubrication properties, and can form a highly adhesive film on the metal surface, lubricating the friction surface of the conductive monofilament 10 when it is squeezed with other structures.
[0041] Furthermore, the lubricant includes one or more of graphite, molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene, and hexagonal boron nitride. That is, the lubricant can be composed of only one of graphite, molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene, and hexagonal boron nitride; or, the lubricant can be a mixture of at least two of graphite, molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene, and hexagonal boron nitride.
[0042] In some embodiments, the metal layer 12 comprises one or more of copper, nickel, gold, silver, zinc, and aluminum. That is, the metal layer 12 can be pure copper, pure nickel, pure gold, pure silver, pure iron, pure zinc, or pure aluminum; or, the metal layer 12 can be an alloy made of at least two of copper, nickel, gold, silver, zinc, and aluminum.
[0043] The metal layer 12 can be one or more layers. Specifically, if the metal layer 12 can be one layer, then the conductive monofilament 10 includes three layers, from the inside out: core layer 11, metal layer 12, and outer layer 13. The metal layer 12 can be multiple layers, and the metals in any layer can be different or the same.
[0044] Additionally, the outer layer 13 may comprise one or more resin materials. For example, the outer layer 13 may comprise one or more of epoxy resin, polyacrylate, polyurethane, polyphenylene ether ketone, polyamide, polyimide, and phenoxy resin. As another example, the outer layer 13 may be made of one of epoxy resin, polyacrylate, polyurethane, polyphenylene ether ketone, polyamide, polyimide, and phenoxy resin, or the outer layer 13 may be made of at least two of epoxy resin, polyacrylate, polyurethane, polyphenylene ether ketone, polyamide, polyimide, and phenoxy resin.
[0045] The conductive fiber according to a second aspect embodiment of this disclosure includes: a conductive sleeve and a plurality of conductive monofilaments 10, wherein the plurality of conductive monofilaments 10 are disposed within the conductive sleeve. Specifically, the plurality of conductive monofilaments 10 are arranged adjacent to each other and housed within the conductive sleeve to form a conductive fiber.
[0046] Furthermore, multiple conductive monofilaments 10 are bonded to the conductive sleeve using conductive adhesive. Specifically, during the fabrication of the conductive fibers, conductive adhesive can be first applied to the conductive sleeve, and then multiple conductive monofilaments 10 are inserted into the conductive sleeve. After the adhesive cures, the conductive monofilaments 10 are connected to the conductive sleeve, allowing for electrical connection between them. The conductive adhesive can be a thermosetting adhesive, which softens upon heating, allowing it to bond to the conductive sleeve and the conductive monofilaments 10, and then re-cures to achieve a fixed connection.
[0047] A conductive ring assembly according to a third aspect embodiment of the present disclosure includes: a body having a fiber aperture radially formed therefrom; and a conductive fiber disposed in the fiber aperture, with at least one end of the conductive fiber extending out of the fiber aperture. The body is annular, the fiber aperture extends radially along the body, and the conductive fiber is disposed along the extension direction of the fiber aperture.
[0048] The main body can be made of metal and is grounded. When the conductive fiber makes interference contact with the motor shaft, the main body is grounded, establishing a low-impedance path within the motor, which can effectively conduct shaft current and thus protect the motor bearings.
[0049] The conductive ring body has multiple fiber holes that are evenly spaced along the circumference of the body, and the conductive fibers correspond one-to-one with the fiber holes.
[0050] In some embodiments, the body includes a receiving ring and a pressing ring, the receiving ring and the pressing ring being connected to form a fiber hole between the receiving ring and the pressing ring. A conductive fiber is sandwiched between the receiving ring and the pressing ring. When installing the conductive fiber, the conductive fiber is first placed inside the receiving ring, and then the pressing ring is placed over the receiving ring, so that the receiving ring and the pressing ring are pressed together, forming a fiber hole between the receiving ring and the pressing ring. The fiber hole is pressed against the conductive fiber, achieving the connection between the conductive fiber and the body, forming a conductive ring assembly.
[0051] In some embodiments, the receiving ring is provided with a fiber groove in the radial direction, and the pressure ring is provided with a serrated portion in the radial direction, the serrated portion abutting against the conductive fiber. Specifically, the fiber groove extends radially along the receiving ring, the serrated portion extends radially along the pressure ring, the fiber groove and the serrated portion correspond to each other, and a fiber hole is formed between the fiber groove and the serrated portion. The conductive fiber is disposed in the fiber hole, and the serrated portion abuts against the conductive fiber.
[0052] By utilizing the serrated part to act on the undulating, wavy contact surface of the conductive fiber, the serrated part achieves multiple loosening and tightening of the conductive fiber, which can effectively solve the fastening problem between solid objects and fine fibers. No additional glue is needed for auxiliary fixation, thus making the conductive ring assembly suitable for oil-cooled motors.
[0053] There can be multiple fiber grooves and multiple sawtooth sections. The multiple fiber grooves and multiple sawtooth sections correspond one-to-one. The multiple fiber grooves and multiple sawtooth sections form multiple fiber holes. The conductive fiber is placed in the fiber hole, and the sawtooth section abuts against the conductive fiber.
[0054] The motor according to a fourth aspect embodiment of this disclosure includes: a housing, a shaft, and a conductive ring assembly. The conductive ring assembly is connected to the housing, and the shaft is rotatably disposed within the conductive ring assembly. Conductive fibers are slidably electrically contacted with the outer peripheral surface of the shaft. The conductive fibers have a certain degree of flexibility and press against the outer peripheral surface of the shaft to achieve electrical contact. The shaft is the shaft of the motor, and during the rotation of the shaft, the ends of the conductive fibers are slidably electrically contacted with the outer peripheral surface of the shaft.
[0055] High-frequency induced shaft current exhibits a skin effect, meaning it concentrates in a thin layer on the surface of the conductive fiber. The closer to the surface of the conductive fiber, the greater the current density, while the current inside the conductor is actually smaller. When the conductive fiber is in interference contact with the motor shaft, a grounded current loop can be formed through the shaft, the conductive fiber, and the grounding point on the motor body. This effectively conducts away the shaft voltage and shaft current, thereby reducing shaft current, minimizing damage to the motor bearings, and ultimately extending the motor's service life.
[0056] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
[0058] Although embodiments of this disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this disclosure, the scope of which is defined by the claims and their equivalents.
Claims
1. A conductive monofilament, characterized in that, include: Core layer (11), said core layer (11) comprising carbon fiber filaments; A metal layer (12) is provided, which covers the outer periphery of the core layer (11); An outer layer (13) covering the outer periphery of the metal layer (12), the outer layer (13) comprising resin; and A lubricating substance disposed within the metal layer (12) and / or the outer layer (13).
2. The conductive monofilament according to claim 1, characterized in that, The friction coefficient of the lubricating substance is μ, and μ satisfies the relationship: 0.04≤μ≤0.
1.
3. The conductive monofilament according to claim 1 or 2, characterized in that, The lubricating substance is a layered two-dimensional material.
4. The conductive monofilament according to any one of claims 1-3, characterized in that, The lubricating material includes one or more of graphite, molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene, and hexagonal boron nitride.
5. The conductive monofilament according to any one of claims 1-4, characterized in that, The metal layer (12) includes one or more of copper, nickel, gold, silver, zinc and aluminum.
6. The conductive monofilament according to any one of claims 1-5, characterized in that, The metal layer (12) may be one or more layers.
7. The conductive monofilament according to any one of claims 1-6, characterized in that, The outer layer (13) includes one or more of epoxy resin, polyacrylate, polyurethane, polyphenylene ether ketone, polyamide, polyimide, and phenoxy resin.
8. A conductive fiber, characterized in that, include: Conductive sleeve; as well as A plurality of conductive monofilaments (10) as described in any one of claims 1-7, wherein the plurality of conductive monofilaments (10) are disposed within the conductive sleeve.
9. The conductive fiber according to claim 8, characterized in that, Multiple conductive monofilaments (10) are bonded to the inside of the conductive sleeve with conductive adhesive.
10. A conductive ring assembly, characterized in that, include: The body has fiber holes radially formed. as well as The conductive fiber as described in claim 8 or 9, wherein the conductive fiber is disposed within the fiber aperture, and at least one end of the conductive fiber extends out from the fiber aperture.
11. The conductive ring assembly according to claim 10, characterized in that, The body includes: Pressure ring; and A receiving ring, which is connected to the pressure ring, to form the fiber pore between the receiving ring and the pressure ring.
12. The conductive ring assembly according to claim 11, characterized in that, The receiving ring has a fiber groove in its radial direction, and the pressure ring has a serrated portion in its radial direction, the serrated portion abutting against the conductive fiber.
13. An electric motor, characterized in that, include: case; Shaft; as well as According to any one of claims 10-12, the conductive ring assembly is connected to the housing, the rotating shaft is rotatably disposed within the conductive ring assembly, and the conductive fiber is slidably electrically contacting the outer peripheral surface of the rotating shaft.