Conductive monofilament, wire fiber, conductive ring assembly and motor

Abstract

The invention discloses a conductive monofilament, a wire fiber, a conductive ring assembly and a motor, and the conductive monofilament comprises a core layer which comprises a carbon fiber filament; the periphery of the core layer is coated with the metal layer; the outer layer is coated on the periphery of the metal layer, and the outer layer comprises resin; and the lubricating substance is arranged in the metal layer and / or the outer layer. The lubricating substance is added into the conductive monofilament, so that a good lubricating effect is achieved, the wear resistance of the conductive monofilament can be enhanced, the lubricating effect is achieved when the conductive monofilament moves relative to other mechanisms, and friction and wear of the conductive monofilament are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of conductive rings, and in particular to a conductive monofilament, a conductor fiber, a conductive ring component and a motor. Background Art

[0002] In the field of new energy vehicle motors, as the trend of automotive motors develops towards higher and higher power, the problem of electrical corrosion of bearings caused by shaft voltage is becoming more and more serious. The conductive ring is 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 crimped with the fiber, and the metal shell is grounded, establishing a low-impedance path in the motor system, which can effectively conduct the shaft current and thus protect the motor bearings.

[0003] However, with the rapid development of new energy vehicles, the speed of new energy vehicle motors is getting higher and higher. Under the high speed of the motor shaft, the conductive fiber of the conductive ring rubs against the motor shaft, which requires higher wear resistance for the conductive fiber. In addition, the conductive ring is installed on the motor, which does not require replacement or maintenance during the entire life cycle of the motor or even the entire vehicle. Therefore, the wear resistance of the conductive fiber is very important. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a conductive monofilament, in which a lubricating substance is added to the conductive monofilament to have a good lubricating effect, 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.

[0005] The invention also provides a conductive fiber.

[0006] The present invention further provides a conductive ring assembly.

[0007] The present invention further provides a motor.

[0008] According to the first aspect of the present invention, the conductive monofilament comprises: a core layer, the core layer comprises carbon fiber filaments; a metal layer, the metal layer is coated on the periphery of the core layer; an outer layer, the outer layer is coated on the periphery of the metal layer, the outer layer comprises resin; and a lubricating substance, the lubricating substance is arranged in the metal layer and / or the outer layer.

[0009] According to the conductive monofilament of the embodiment of the present invention, adding lubricating substance into the conductive monofilament has a good lubricating effect, 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.

[0010] According to some embodiments of the present invention, the friction coefficient of the lubricating substance is μ, and μ satisfies the relationship: 0.04≤μ≤0.1.

[0011] According to some embodiments of the present invention, the lubricating substance is a layered two-dimensional material.

[0012] According to some embodiments of the present invention, the lubricating substance includes one or more of graphite, molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene and hexagonal boron nitride.

[0013] According to some embodiments of the present invention, the metal layer includes one or more of copper, nickel, gold, silver, zinc and aluminum.

[0014] According to some embodiments of the present invention, the metal layer is one layer or multiple layers.

[0015] According to some embodiments of the present invention, the outer layer includes one or more of epoxy resin, polyacrylate, polyurethane, polyphenylene ether ketone, polyamide, polyimide, and phenoxy resin.

[0016] The conductive fiber according to the second aspect of the present invention comprises: a conductive sleeve; and a plurality of conductive monofilaments disposed in the conductive sleeve.

[0017] According to some embodiments of the present invention, the plurality of conductive monofilaments are bonded in the conductive sleeve by conductive glue.

[0018] According to the third aspect of the present invention, the conductive ring assembly comprises: a body, wherein a fiber hole is radially opened in the body; and the conductive fiber is arranged in the fiber hole, and at least one end of the conductive fiber extends out from the fiber hole.

[0019] According to some embodiments of the present invention, the body includes: a containment ring and a pressure ring, wherein the containment ring is connected to the pressure ring to form a fiber hole between the containment ring and the pressure ring.

[0020] According to some embodiments of the present invention, the containment ring is provided with fiber grooves in a radial direction, and the pressure ring is provided with serrations in a radial direction, and the serrations abut against the conductive fibers.

[0021] The motor according to the fourth aspect of the present invention includes: a shell; a rotating shaft; the conductive ring assembly, the conductive ring assembly is connected to the shell, the rotating shaft is rotatably arranged in the conductive ring assembly, and the conductive fiber is slidably in electrical contact with the outer peripheral surface of the rotating shaft.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 Schematic diagram of a cross-section of a conductive monofilament according to an embodiment of the present invention.

[0024] Reference numerals: 10. Conductive monofilament; 11. Core layer; 12. Metal layer; 13. Outer layer. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0026] Reference below Figure 1 A conductive monofilament 10 according to an embodiment of the present invention is described, and a conductive fiber including the conductive monofilament 10 is also proposed, as well as a conductive ring assembly including the conductive fiber is proposed; and a motor including the conductive ring assembly is further proposed.

[0027] like Figure 1 As shown, the conductive monofilament 10 includes: a core layer 11, a metal layer 12 and an outer layer 13. Specifically, the metal layer 12 is coated on the outer periphery of the core layer 11, and the outer layer 13 is coated on the outer periphery of the metal layer 12, that is, the metal layer 12 is arranged between the core layer 11 and the outer layer 13, and the metal layer 12 enables the conductive monofilament 10 to have good conductive properties.

[0028] The core layer 11 is made of carbon fiber filaments, the metal layer 12 enables the conductive monofilament 10 to have a better conductive effect, and the outer layer 13 includes resin.

[0029] Furthermore, the conductive monofilament 10 further comprises: a lubricating substance, which can lubricate the surface in relative motion to reduce wear or scratches of the conductive monofilament 10. The lubricating substance can be a solid lubricant, which has a wide operating temperature range, strong load-bearing capacity, good anti-stick-slip property, high vacuum resistance, radiation resistance, wide conductivity range, corrosion resistance, and dust resistance.

[0030] During the friction process, the lubricating substance and the surrounding medium react physically and chemically with the friction surface to form a solid lubricating film, thereby reducing friction and wear. Adding the lubricating substance into the conductive monofilament 10 has a good lubricating effect and can enhance the wear resistance of the conductive monofilament 10. When the conductive monofilament 10 moves relative to other mechanisms, it plays a lubricating role, thereby reducing friction and wear of the conductive monofilament 10.

[0031] In some embodiments, the lubricating substance may be disposed in the metal layer 12. That is, the lubricating substance may be added to the metal layer 12, and when the conductive monofilament 10 rubs against other structures and the metal layer 12 wears off, the lubricating substance may be between the friction surface of the conductive monofilament 10 and the other structure, which has a good lubricating effect and can enhance the wear resistance of the conductive monofilament 10.

[0032] The lubricating substance may be a dry solid lubricant, which has a lamellar structure with parallel atomic bonds, a small distance between each layer, and does not change the aggregation state during use, such as graphite, molybdenum disulfide, boron nitride, etc. This lubricant has excellent pressure resistance, heat resistance and lubrication properties, can form a highly adhesive film on the metal surface, and lubricate the friction surface of the conductive monofilament 10 when the conductive monofilament 10 is squeezed with other structures.

[0033] In addition, the lubricating substance can be salts, such as inorganic compound chlorides and phosphates. These chlorine- and phosphorus-containing substances have an activation effect. At a certain temperature, they can react chemically with the chemical elements on the metal surface to form a chemical reaction film of phosphide or chloride on the contact surface with anti-sticking and wear-reducing effects. The strength of the film is much greater than that of the chemical or physical adsorption film.

[0034] In some embodiments, the lubricating substance may be disposed in the outer layer 13. When the conductive monofilament 10 rubs against other structures, or when the resin wears off, the lubricating substance may be between the friction surface of the conductive monofilament 10 and the other structure. The lubricating substance has a good lubricating effect and can enhance the wear resistance of the conductive monofilament 10.

[0035] In some embodiments, the friction coefficient of the lubricating substance is μ, and 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, and 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.

[0036] Furthermore, the lubricant is a layered two-dimensional material. For example, graphite, molybdenum disulfide, boron nitride, etc., have a lamellar structure with parallel atomic bonds, small spacing between layers, and do not change the aggregation state during use. This lubricant has excellent pressure resistance, heat resistance and lubrication properties, can form a highly adhesive film on the metal surface, and lubricate the friction surface of the conductive monofilament 10 when the conductive monofilament 10 is squeezed with other structures.

[0037] Furthermore, the lubricating substance includes one or more of graphite, molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene and hexagonal boron nitride. That is, the lubricating substance can be composed of one of graphite, molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene and hexagonal boron nitride alone. Alternatively, the lubricating substance can be a mixture of at least two of graphite, molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene and hexagonal boron nitride.

[0038] The metal layer 12 includes one or more of copper, nickel, gold, silver, zinc and aluminum. That is, the metal layer 12 can be pure copper or pure nickel or pure gold or pure silver or pure iron or pure zinc or pure aluminum. Alternatively, the metal layer 12 can be an alloy made of at least two of copper, nickel, gold, silver, zinc and aluminum.

[0039] The metal layer 12 is one or more layers. Specifically, the metal layer 12 can be one layer, and the conductive monofilament 10 includes three layers, which are the core layer 11, the metal layer 12 and the outer layer 13 from the inside to the outside. The metal layer 12 can be multiple layers, and the metals of any layer can be different or the same.

[0040] In addition, the outer layer 13 includes one or more of epoxy resin, polyacrylate, polyurethane, polyphenylene ether ketone, polyamide, polyimide, and phenoxy resin. The outer layer 13 may include one or more resin materials, and the outer layer 13 may be made of one of epoxy resin, polyacrylate, polyurethane, polyphenylene ether ketone, polyamide, polyimide, and phenoxy resin. Alternatively, the outer layer 13 may be made of at least two of epoxy resin, polyacrylate, polyurethane, polyphenylene ether ketone, polyamide, polyimide, and phenoxy resin.

[0041] The conductive fiber according to the second embodiment of the present invention comprises: a conductive sleeve and a plurality of conductive monofilaments 10, wherein the plurality of conductive monofilaments 10 are disposed in the conductive sleeve. Specifically, the plurality of conductive monofilaments 10 are disposed adjacent to each other and contained in the conductive sleeve to form the conductive fiber.

[0042] Furthermore, a plurality of conductive monofilaments 10 are bonded in the conductive sleeve by conductive glue. Specifically, when making the conductive fiber, conductive glue can be first set in the conductive sleeve, and then a plurality of conductive monofilaments 10 can be inserted into the conductive sleeve. After the glue is cured, the conductive monofilaments 10 are connected to the conductive sleeve, and electrical connection between the two is allowed. The conductive glue can be a thermosetting glue, which softens when heated, can be bonded to the conductive sleeve and the conductive monofilaments 10, and can be fixedly connected after re-curing.

[0043] According to the third aspect of the present invention, the conductive ring assembly comprises: a body, a fiber hole is opened in the radial direction of the body; and conductive fibers are arranged in the fiber hole, and at least one end of the conductive fibers extends out of the fiber hole. The body is annular, the fiber hole extends in the radial direction of the body, and the wire limiter is arranged along the extension direction of the fiber hole. The body can be made of metal and grounded. When the conductive fiber is in interference contact with the motor shaft, the body is grounded, and a low impedance path is established in the motor, which can effectively conduct the shaft current and protect the motor bearings.

[0044] There are a plurality of fiber holes which are evenly spaced on the conductive ring body along the circumference of the body, and the conductive fibers correspond to the fiber holes one by one.

[0045] In some embodiments, the body includes: a container ring and a pressure ring, the container ring is connected to the pressure ring to form a fiber hole between the container ring and the pressure ring. The conductive fiber is sandwiched between the container ring and the pressure ring. When installing the conductive fiber, the conductive fiber is first placed in the container ring, and then the pressure ring is covered on the container ring, so that the container ring and the pressure ring are crimped and connected, and then a fiber hole is formed between the container ring and the pressure ring, and the fiber hole is crimped with the conductive fiber to achieve the connection between the conductive fiber and the body, forming a conductive ring assembly.

[0046] In some embodiments, a fiber groove is provided in the radial direction of the containment ring, and a serration is provided in the radial direction of the pressure ring, and the serration abuts against the conductive fiber. Specifically, the fiber groove extends in the radial direction of the containment ring, and the serration extends in the radial direction of the pressure ring, the fiber groove and the serration correspond to each other, and a fiber hole is formed between the fiber groove and the serration, and the conductive fiber is provided in the fiber hole, and the serration abuts against the conductive fiber.

[0047] By using the serrations to act on the undulating wave-shaped contact surface of the conductive fiber, the serrations can press the conductive fiber multiple times to make it loose and tight, which can effectively solve the problem of fastening between solid objects and fine fibers. No additional glue is needed for auxiliary fixing, so that the conductive ring assembly can be applied to oil-cooled motors.

[0048] There may be multiple fiber grooves and multiple serrations, and the multiple fiber grooves and multiple serrations correspond to each other one by one. The multiple fiber grooves and multiple serrations form multiple fiber holes. The conductive fibers are arranged in the fiber holes, and the serrations abut against the conductive fibers.

[0049] The motor according to the fourth aspect of the present invention comprises: a housing, a rotating shaft and a conductive ring assembly, the conductive ring assembly is connected to the housing, the rotating shaft is rotatably arranged in the conductive ring assembly, and the conductive fiber is slidably electrically contacted with the outer peripheral surface of the rotating shaft. The conductive fiber has a certain flexibility and is pressed against the outer peripheral surface of the rotating shaft to achieve electrical contact. The rotating shaft is the rotating shaft of the motor, and during the rotation of the rotating shaft, the end of the conductive fiber is slidably electrically contacted with the outer peripheral surface of the rotating shaft.

[0050] The high-frequency induced shaft current has a skin effect, that is, it is concentrated 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, and the actual current inside the conductor is smaller. When the conductive fiber is in interference contact with the motor shaft, a grounded current loop can be formed through the rotating shaft, the conductive fiber, and the grounding point on the body, which can effectively guide the shaft voltage and shaft current, thereby reducing the shaft current, reducing damage to the motor bearings, and thus extending the service life of the motor.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0053] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A conductive monofilament, characterized in that: include: A core layer (11), the core layer (11) comprising carbon fiber filaments; A metal layer (12), the metal layer (12) being coated on the outer periphery of the core layer (11); An outer layer (13), the outer layer (13) being coated on the outer periphery of the metal layer (12), and the outer layer (13) comprising resin; A lubricating substance, wherein the lubricating substance is arranged in 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, characterized in that The lubricating substance is a layered two-dimensional material.

4. The conductive monofilament according to claim 1, characterized in that The lubricating substance includes one or more of graphite, molybdenum disulfide, tungsten disulfide, polytetrafluoroethylene and hexagonal boron nitride.

5. The conductive monofilament according to claim 1, characterized in that The metal layer (12) comprises one or more of copper, nickel, gold, silver, zinc and aluminum.

6. The conductive monofilament according to claim 1, characterized in that The metal layer (12) is one layer or multiple layers.

7. The conductive monofilament according to claim 1, characterized in that The outer layer (13) comprises 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; A plurality of conductive monofilaments (10) according to any one of claims 1 to 7, wherein the plurality of conductive monofilaments (10) are arranged in the conductive sleeve.

9. The conductive fiber according to claim 8, characterized in that The plurality of conductive monofilaments (10) are bonded in the conductive sleeve by conductive glue.

10. A conductive ring assembly, characterized in that: include: A body, wherein fiber holes are provided in the radial direction of the body; The conductive fiber according to any one of claims 8 to 9, wherein the conductive fiber is arranged in the fiber hole, and at least one end of the conductive fiber extends out of the fiber hole.

11. The conductive ring assembly according to claim 10, characterized in that: The body comprises: a container ring and a pressure ring, wherein the container ring is connected to the pressure ring to form a fiber hole between the container ring and the pressure ring.

12. The conductive ring assembly according to claim 11, characterized in that: The containing ring is provided with a fiber groove in the radial direction, and the pressing ring is provided with a serration in the radial direction, and the serration abuts against the conductive fiber.

13. A motor, characterized in that: include: case; Rotating shaft; The conductive ring assembly according to any one of claims 10 to 12, wherein the conductive ring assembly is connected to the shell, the rotating shaft is rotatably disposed in the conductive ring assembly, and the conductive fiber is slidably in electrical contact with the outer peripheral surface of the rotating shaft.

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