conductive structure

Abstract

The utility model provides a kind of conductive structure, including substrate, axial through cooperation hole is provided on the substrate, a radial surface of the substrate is provided with a plurality of first conductive parts, a plurality of the first conductive parts are evenly distributed with cooperation hole as center, a radial surface of the substrate is also provided with a plurality of second conductive parts away from first conductive part, a plurality of the second conductive parts are evenly distributed with cooperation hole as center, the first conductive part and second conductive part are staggered arrangement;Setting double-layer staggered conductive part, more quantity of conductive part is arranged in limited radial space, so that shaft current can be effectively output from each position of conductive structure uniformly, improves conductive efficiency and service life.

Description

Technical Field

[0001] This utility model relates to the field of current protection technology, specifically to a conductive structure. Background Technology

[0002] In variable frequency control systems, the problem of shaft current discharge (EDM) caused by high-frequency switching is becoming increasingly prominent: high-frequency switches generate common-mode voltage, which breaks down the bearing oil film, causing electrolytic erosion, resulting in fish-scale pits on the raceway and carbonization of the lubricating grease, thus shortening the motor's lifespan. Commonly used electrolytic erosion protection components include insulated bearings and slip rings. Slip rings, also known as collector rings, actively guide destructive shaft currents to a safe area through their reliable sliding contact characteristics.

[0003] Currently, the current-carrying efficiency of conductive rings mainly depends on the contact area between the conductive fiber bundles and the surface of the rotating shaft; the more fibers, the better the current-carrying performance. Currently, new energy vehicle motors on 400V and 800V platforms typically require only about 20 bundles of conductive fibers to meet their needs. However, with the widespread application of high-voltage platforms such as 1200V, higher demands are placed on the current-carrying capacity of conductive rings, requiring the configuration of more conductive fibers to enhance the current-carrying effect. Furthermore, the design of motors is increasingly moving towards integration and compactness, resulting in strict limitations on the installation space of conductive rings and a compression of the fiber bundle arrangement space.

[0004] Meanwhile, conductive rings are typically installed using interference fit or bolts. Interference fit relies mainly on the fit tolerance between the conductive ring body and the motor shaft to generate clamping force. In the fast-paced motor assembly process, this can easily lead to process problems such as cutting the conductive fibers due to misalignment or burrs on the shaft shoulder. While bolt installation provides the convenience of disassembly, its vibration resistance is inherently insufficient, causing the conductive ring's current-carrying function to completely fail. Under complex motor operating conditions, this can easily lead to loose connections or even detachment. These problems affect the efficient production and reliable application of conductive rings.

[0005] Therefore, improving the ease of installation and reliability of conductive rings, and achieving effective arrangement of more conductive fibers within a limited space, has become a key issue that urgently needs to be addressed in the field of current protection. Summary of the Invention

[0006] The purpose of this invention is to provide a conductive structure to solve the above-mentioned problems.

[0007] The technical solution adopted in this utility model is as follows: A conductive structure includes a substrate, on which an axially penetrating mating hole is provided. A plurality of first conductive elements are provided on a radial surface of the substrate, wherein the mating holes of the plurality of first conductive elements are evenly distributed around the center. A plurality of second conductive elements are also provided on a radial surface of the substrate away from the first conductive elements, wherein the plurality of second conductive elements are evenly distributed around the mating hole around the center. The first conductive elements and the second conductive elements are staggered.

[0008] As a further improvement of the present invention, the first conductive element includes a conductive base and a conductive fiber disposed on the conductive base. The conductive base is disposed on a substrate, one end of the conductive fiber extends out of the conductive base, and the conductive fiber falls into a mating hole on the axial projection of the conductive fiber on the substrate.

[0009] As a further improvement of this utility model, the conductive fiber has at least two bundles.

[0010] As a further improvement of the present invention, the conductive base includes a base body and fixing parts disposed on both sides of the base body. The base body is used to install conductive fibers, and the fixing parts are connected to the substrate.

[0011] As a further improvement of this utility model, the structure of the first conductive element is the same as that of the second conductive element.

[0012] As a further improvement of the present invention, an elastic sidewall is formed by extending outward from the outer edge of the substrate to surround the substrate. The elastic sidewall includes a first sidewall and a second sidewall. The first sidewall extends from the substrate in a direction away from the first conductive element, and the second sidewall extends from the end of the first sidewall away from the substrate in a direction close to the first conductive element and away from the axis of the mating hole. The first sidewall and the second sidewall are inclined to each other.

[0013] As a further improvement of the present invention, the projection of the connection between the first sidewall and the second sidewall in the axial direction of the mating hole is located outside the substrate.

[0014] As a further improvement of the present invention, from the substrate to the first conductive element, the height of the second sidewall extending out of the substrate is greater than or equal to the height of the first conductive element, and from the substrate to the second conductive element, the height of the first sidewall extending out of the substrate is greater than or equal to the height of the second conductive element.

[0015] As a further improvement of the present invention, the first sidewall and the second sidewall are connected by an arc transition, and the first sidewall and the substrate are connected by an arc transition.

[0016] As a further improvement of this utility model, the substrate and the elastic sidewall are integrally formed.

[0017] The beneficial effects of this utility model are as follows: With the above structure, a double-layered staggered conductive element is set up, and a greater number of conductive elements are arranged in a limited radial space, so that the shaft current can be output effectively and evenly from various positions of the conductive structure, thereby improving the conductivity and service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the conductive structure facing the first conductive element; Figure 2 This is a schematic diagram of the conductive structure facing the direction of the second conductive component; Figure 3 This is an axial cross-sectional view of the conductive structure.

[0019] Wherein: 1-substrate, 101-fitting hole, 2-elastic sidewall, 201-first sidewall, 202-second sidewall, 3-first conductive element, 301-base body, 302-fixing part, 303-conductive fiber, 4-second conductive element. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0021] If the description of this utility model involves directions (e.g., up, down, left, right, front, back, outside, inside, etc.), then the directions involved need to be defined. For example, "To clearly express the position and direction described in this utility model, the operator of the instrument is used as a reference, the end closer to the operator is the proximal end, and the end farther from the operator is the distal end." Or, the paper can be used as a reference. Of course, if the positional relationship between the two is defined by mutual reference in the subsequent description, then this definition is not required.

[0022] A conductive structure, such as Figures 1-2As shown, the conductive structure includes a substrate 1, on which an axially penetrating mating hole 101 is provided. The mating hole 101 axially penetrates the substrate 1 and is used to accommodate an external structure to be installed in the conductive structure. This external structure is the target for which the conductive structure needs to be protected against electro-erosion. For example, the mating hole 101 can be a shaft hole in which a motor shaft is installed. A plurality of first conductive elements 3 are provided on one radial surface of the substrate 1, and the plurality of first conductive elements 3 are evenly distributed circumferentially around the mating hole 101. A plurality of second conductive elements 4 are also provided on another radial surface of the substrate 1 away from the first conductive elements 3, and the plurality of second conductive elements 4 are evenly distributed circumferentially around the mating hole 101. The first conductive elements 3 and second conductive elements 4 are staggered.

[0023] By arranging conductive elements on the two radial surfaces of the substrate 1, which are collectively referred to as the first conductive element 3 and the second conductive element 4, an axial double-layer conductive structure is formed. This allows for the arrangement of more conductive elements in a limited radial space, enabling the axial current to be evenly and effectively output from various positions of the conductive structure, thereby improving conductivity. Furthermore, during the operation of the external structure to which the conductive structure is applied, if displacement or vibration occurs, the double-sided conductive elements ensure that one conductive element is always in contact with the external structure, thus extending the service life.

[0024] Regarding the staggered arrangement of the first conductive element 3 and the second conductive element 4, "staggered arrangement" here means that, in the axial direction of the substrate 1, the axial projection of the first conductive element 3 and the axial projection of the second conductive element 4 do not coincide. The axial projection of the first conductive element 3 can fall between the axial projections of two second conductive elements 4, and the axial projection of the second conductive element 4 can fall between the axial projections of two first conductive elements 3. The staggered arrangement of the first conductive element 3 and the second conductive element 4 can compensate for each other, achieving stable contact. This ensures that the current on the external structure to which the conductive structure is applied is evenly conducted and grounded, avoiding contact omissions that might occur with aligned arrangements.

[0025] In this embodiment, the number of the first conductive element 3 and the second conductive element 4 is not specifically limited, but can be limited according to usage and design requirements. The structure of the first conductive element 3 may be the same as or different from the structure of the second conductive element 4. The specific structure of the first conductive element 3 and the structure of the second conductive element 4 can be selected according to design requirements, and this embodiment does not limit this.

[0026] As an embodiment of this utility model, the first conductive element 3 includes a conductive base and a conductive fiber 303 disposed on the conductive base. The conductive base is disposed on the substrate 1. One end of the conductive fiber 303 extends out of the conductive base and falls into the mating hole 101 on the axial projection of the conductive fiber 303 on the substrate 1. Through the additional installation structure, namely the conductive base, a stable installation environment and impact resistance can be provided for the conductive fiber 303, thereby improving the reliability of the electrical connection. At the same time, when a single conductive fiber 303 is damaged, the conductive fiber 303 can be repaired or replaced simply by disassembling the conductive base.

[0027] Specifically, there may be one, two, or more than two conductive fibers 303 within one first conductive element 3. The specific number of conductive fibers 303 can be selected according to design requirements, and this embodiment does not limit this. As one embodiment of the present invention, there may be two conductive fibers 303 within one first conductive element 3.

[0028] Furthermore, the conductive base includes a base body 301 and fixing parts 302 disposed on both sides of the base body 301. The base body 301 is used to install conductive fibers 303, mainly to realize the functions of accommodating, fiberizing, and fixing the conductive fibers 303. The base body 301 may be provided with a hole-like structure with one or both sides penetrating through it. The conductive fibers 303 can extend from one side through to the mating hole 101. The fixing parts 302 are used to connect with the substrate 1. The connection method between the conductive base and the substrate 1 includes, but is not limited to, welding, bolting, and gluing. The specific connection method can be selected according to the design requirements. This embodiment does not limit this.

[0029] Specifically, the base body 301 and the fixing part 302 are integrally formed, thereby enhancing the connection strength and processing convenience of the two. Specifically, the height of the fixing part 302 is less than the height of the base body 301, where the height is the maximum vertical distance from a point on the component to the radial surface of the substrate 1. The volume of the fixing part 302 is less than the volume of the base body 301. The center of mass of the conductive base is located at the base body 301, which enhances the stability and lateral stiffness of the structure, optimizes stress distribution, and also facilitates processing and assembly.

[0030] As an embodiment of this utility model, the structure of the first conductive element 3 is the same as that of the second conductive element 4. The contact pressure of the first conductive element 3 and the second conductive element 4 is uniform and symmetrical. When rotating, a stable frictional torque can be generated, avoiding the generation of unilateral overheating. It is suitable for structures that require smooth movement and simplifies the manufacturing process.

[0031] As a further improvement to this utility model, such as Figure 1 , Figure 3 As shown, an elastic sidewall 2 extends outward from the outer edge of the substrate 1 to form an enclosure of the substrate 1. When the conductive structure is installed into the external structure by means of embedding, the force brought by the external structure will act on the elastic sidewall 2. The elastic sidewall 2 deforms after being subjected to force, so that the conductive structure can be smoothly installed into the external structure. At the same time, the elastic sidewall 2 also applies a reaction force to the external structure, forming an elastic interference fit, which increases the tightness of the connection between the two.

[0032] In this embodiment, the axial cross section of the elastic sidewall 2 can be V-shaped, arc-shaped, etc. The specific shape and structure can be selected according to design requirements, and this embodiment does not limit it.

[0033] As an embodiment of the present invention, the elastic sidewall 2 includes a first sidewall 201 and a second sidewall 202. The first sidewall 201 extends from the substrate 1 in a direction away from the first conductive member 3. The second sidewall 202 extends from the end of the first sidewall 201 away from the substrate 1 in a direction close to the first conductive member 3 and away from the axis of the mating hole 101. The first sidewall 201 and the second sidewall 202 have an included angle, so that the first sidewall 201 and the second sidewall 202 are inclinedly arranged.

[0034] In this embodiment, the included angle can be an acute angle, a right angle, or an obtuse angle. The specific angle can be selected according to design requirements, and this embodiment does not limit it. Typically, an acute angle structure can be used when space is limited.

[0035] In one embodiment of this utility model, the projection of the connection between the first sidewall 201 and the second sidewall 202 onto the axial direction of the substrate 1 is located outside the substrate 1, that is, outside the outer edge of the substrate 1. It can be seen that the extension direction of the first sidewall 201 is not only away from the first conductive element 3, but also away from the axis of the mating hole 101. That is, in the axial cross-section of the substrate 1, the elastic sidewall 2 is V-shaped. The V-shaped elastic sidewall 2 structure provides sufficient elastic deformation force, preventing the conductive structure from detaching from the device it needs to be installed on, making installation easier. Furthermore, the angle formed by the inclination between the first sidewall 201 and the second sidewall 202 provides a gap, giving the second sidewall 202 deformation space and buffering the pressure deformation it undergoes. Moreover, the deformation of the elastic sidewall 2 does not interfere with the substrate 1, greatly reducing the interference of installation deformation on the welding joint.

[0036] In one embodiment of this utility model, on the axial cross-section of the substrate 1, from the substrate 1 towards the first conductive element 3, the height of the second sidewall 202 extending from the substrate 1 is greater than or equal to the height of the first conductive element 3. Therefore, the second sidewall 202 is higher than or flush with the first conductive element 3, and the second sidewall 202 can provide a certain degree of protection for the first conductive element 3. From the substrate 1 towards the second conductive element 4, the height of the first sidewall 201 extending from the substrate 1 is greater than or equal to the height of the second conductive element 4. Therefore, the first sidewall 201 is higher than or flush with the second conductive element 4, and the first sidewall 201 can provide a certain degree of protection for the second conductive element 4.

[0037] As an embodiment of this utility model, the first sidewall 201 and the second sidewall 202 are connected by an arc transition, and the first sidewall 201 and the substrate 1 are connected by an arc transition. This avoids stress concentration at the connection points, enhances the structural strength and rigidity, and improves fatigue life. At the same time, the rounded external shape can also prevent damage to other components during assembly or use.

[0038] As one embodiment of this utility model, the wall thickness of the elastic sidewall 2 is greater than or equal to 1 mm and less than or equal to 2 mm. The wall thickness of the elastic sidewall 2 mentioned here refers to the wall thickness D1 of the first sidewall 201 and the wall thickness D2 of the second sidewall 202. While making the overall structure elastic, it can still maintain a certain rigidity, so as to avoid damage during the pressing process or difficulty in recovery after deformation.

[0039] As one embodiment of this utility model, the substrate 1 and the elastic sidewall 2 are integrally formed. Specifically, the substrate 1 and the elastic sidewall 2 can be directly formed by stamping, avoiding the traditional method of separate processing followed by assembly by welding, riveting or screw fixing, thus saving costs.

[0040] In this embodiment, the axial projection of the substrate 1 can be rectangular, circular, triangular, polygonal, or other irregular shapes, specifically selected according to the external structure or design requirements of the conductive structure. The axial projection of the elastic sidewall 2 can be rectangular, circular, triangular, polygonal, or other irregular shapes, specifically selected according to the external structure or design requirements of the conductive structure.

[0041] In one embodiment of the present invention, the substrate 1 is annular, wherein the mating hole 101 is the inner ring of the substrate 1, the elastic sidewall 2 is annular, and the outer ring edge of the substrate 1 is connected to the inner ring edge of the elastic sidewall 2.

[0042] The conductive structure provided by this utility model, by setting up double-layered staggered conductive elements, arranges a greater number of conductive elements in a limited radial space, so that the shaft current can be evenly and effectively output from various positions of the conductive structure, thereby improving the conductivity efficiency. At the same time, the addition of an elastic sidewall 2 to bear the external force that the conductive structure will be subjected to during installation, the V-shaped structural design allows the elastic sidewall 2 to have deformation space, providing a buffer for the pressure deformation and not interfering with the substrate 1, greatly reducing the interference of installation deformation on the welding joint, and making installation simpler.

[0043] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0044] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementation methods or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A conductive structure, characterized in that: The substrate includes a substrate (1), on which an axially penetrating mating hole (101) is provided. A plurality of first conductive elements (3) are provided on a radial surface of the substrate (1), and the plurality of first conductive elements (3) are evenly distributed circumferentially around the mating hole (101). A plurality of second conductive elements (4) are also provided on the radial surface of the substrate (1) away from the first conductive elements (3), and the plurality of second conductive elements (4) are evenly distributed circumferentially around the mating hole (101). The first conductive elements (3) and the second conductive elements (4) are staggered.

2. The conductive structure according to claim 1, characterized in that: The first conductive element (3) includes a conductive base and a conductive fiber (303) disposed on the conductive base. The conductive base is disposed on the substrate (1). One end of the conductive fiber (303) extends out of the conductive base. The conductive fiber (303) falls into the mating hole (101) on the axial projection of the conductive fiber (303) on the substrate (1).

3. The conductive structure according to claim 2, characterized in that: The conductive fiber (303) has at least two bundles.

4. The conductive structure according to claim 2, characterized in that: The conductive base includes a base body (301) and fixing parts (302) disposed on both sides of the base body (301). The base body (301) is used to install conductive fibers (303), and the fixing parts (302) are connected to the substrate (1).

5. The conductive structure according to claim 2, characterized in that: The structure of the first conductive element (3) is the same as that of the second conductive element (4).

6. The conductive structure according to claim 1, characterized in that: An elastic sidewall (2) is formed by extending outward from the outer edge of the substrate (1) to surround the substrate (1). The elastic sidewall (2) includes a first sidewall (201) and a second sidewall (202). The first sidewall (201) extends from the substrate (1) in a direction away from the first conductive element (3). The second sidewall (202) extends from the end of the first sidewall (201) away from the substrate (1) in a direction close to the first conductive element (3) and away from the axis of the mating hole (101). The first sidewall (201) and the second sidewall (202) are inclined together.

7. The conductive structure according to claim 6, characterized in that: The projection of the connection between the first sidewall (201) and the second sidewall (202) in the axial direction of the mating hole (101) is outside the substrate (1).

8. The conductive structure according to claim 6, characterized in that: From the substrate (1) toward the first conductive element (3), the height of the second sidewall (202) extending out of the substrate (1) is greater than or equal to the height of the first conductive element (3), and from the substrate (1) toward the second conductive element (4), the height of the first sidewall (201) extending out of the substrate (1) is greater than or equal to the height of the second conductive element (4).

9. The conductive structure according to claim 6, characterized in that: The first sidewall (201) and the second sidewall (202) are connected by an arc transition, and the first sidewall (201) and the substrate (1) are connected by an arc transition.

10. The conductive structure according to claim 6, characterized in that: The substrate (1) and the elastic sidewall (2) are integrally formed.

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