Sandwiched conductive ring

Abstract

The present application relates to the technical field of conductive ring, and particularly relates to a sandwich conductive ring for the motor shaft and the shell, comprising a shell, a conductive ring body and an oil blocking assembly; the conductive ring body is arranged in the shell, and a flexible conductor for contacting the motor shaft and transmitting static electricity of the shaft to the shell is arranged on the conductive ring body; the oil blocking assembly is arranged on one side or both sides of the conductive ring body, and comprises a plurality of oil blocking sheets arranged in the circumferential direction and combined to form an annular structure; an upper overlapping part is arranged at one end of the oil blocking sheet, and a lower overlapping part is arranged at the other end of the oil blocking sheet, and adjacent oil blocking sheets are overlapped in the thickness direction through the upper and lower overlapping parts. The present application can independently float through the structure of the split oil blocking sheet to adapt to the shaft diameter tolerance and wear, and the labyrinth seal is formed through the overlapping, so that the oil dirt is effectively blocked, and the oil dirt prevention performance and operation reliability are improved.

Description

Technical Field

[0001] This invention relates to the technical field of conductive rings, and more particularly to a sandwich conductive ring. Background Technology

[0002] As a critical drive device, the performance and reliability of the electric motor are essential for the normal operation of the entire system. During operation, especially in variable frequency motors and servo motors, static electricity can easily be generated between the rotating shaft and the bearings. When this static electricity accumulates, it discharges through the bearings or other conductive components, which may cause localized overheating, accelerate bearing wear, or even lead to electrolytic corrosion, posing a serious threat to the normal operation of the motor.

[0003] To eliminate the adverse effects of shaft static electricity on motor operation, existing technologies include installing conductive rings between the motor shaft and the motor housing. For example, (CN223859007U) discloses a conductive ring for oil-cooled shafts, which includes a conductive ring casting with a ring-shaped structure. A mounting ring is fixedly connected to the inner wall of the conductive ring casting, and carbon fiber filaments arranged at equal intervals are installed on the mounting ring. The carbon fiber filaments transfer shaft static electricity to the conductive ring casting. The conductive ring casting is divided into two mounting cavities by the mounting ring, and rubber oil baffles can be detachably installed in both mounting cavities to prevent oil from contacting the carbon fiber filaments.

[0004] However, the oil baffle of the conductive ring in the existing technology is an integral ring structure, which cannot automatically compensate for wear and is difficult to adapt to shaft diameter tolerances, which easily leads to oil stains seeping into the conductive area. Summary of the Invention

[0005] The purpose of this invention is to provide a sandwich conductive ring to solve the technical problem that the oil baffle of the conductive ring in the prior art is an integral ring structure, which cannot automatically compensate for wear and is difficult to adapt to shaft diameter tolerances, and is prone to oil stains seeping into the conductive area.

[0006] In a first aspect, the present invention provides a sandwich conductive ring for use between a motor shaft and a motor housing, comprising: case; A conductive ring body is disposed inside the housing, and a flexible conductor is arranged on the conductive ring body. The flexible conductor is used to contact the motor shaft and transfer the static electricity of the shaft to the housing. An oil-blocking assembly is disposed on one or both sides of the conductive ring body. The oil-blocking assembly includes multiple oil-blocking plates, which are arranged circumferentially and combined to form a ring structure. The oil baffle has an upper overlapping portion at one end and a lower overlapping portion at the other end. Adjacent oil baffles are stacked and overlapped in the thickness direction through the upper overlapping portion and the lower overlapping portion.

[0007] Furthermore, the conductive ring body is composed of multiple conductive ring pieces spliced ​​together circumferentially.

[0008] Furthermore, the conductive ring is an arc-shaped sheet structure, and multiple conductive rings are spliced ​​together circumferentially around the motor shaft to form a ring.

[0009] Furthermore, the flexible conductor is a conductive fiber, carbon fiber, or conductive plastic.

[0010] Furthermore, the oil baffle assembly can be arranged on one side or on both sides. When it is arranged on both sides, the oil baffle assembly is provided on both sides of the conductive ring body.

[0011] Furthermore, the housing is provided with a positioning groove, and the oil baffle is provided with a corresponding positioning pin. The positioning pin is slidably disposed in the positioning groove to limit the movement trajectory of the oil baffle.

[0012] Furthermore, each of the oil baffles is provided with two or more positioning pins, which respectively cooperate with the corresponding positioning grooves.

[0013] Furthermore, it also includes an elastic element, on which a spring groove is provided. One end of the elastic element is accommodated in the spring groove, and the other end abuts against a mounting groove provided on the oil baffle, for applying a thrust toward the motor shaft to the oil baffle.

[0014] Furthermore, it also includes a cover plate, which is bolted to the housing to press the internal structure. When the oil baffle assembly is arranged on both sides, the cover plate is provided on both sides of the housing.

[0015] Furthermore, the oil baffle is made of graphite, composite materials, or polymer materials.

[0016] Compared with the prior art, the present invention provides a sandwich conductive ring for use between a motor shaft and a housing, comprising a housing, a conductive ring body, and an oil-blocking assembly; the conductive ring body is disposed within the housing, and a flexible conductor is arranged on the conductive ring body for contacting the motor shaft and transferring static electricity from the shaft to the housing; the oil-blocking assembly is disposed on one or both sides of the conductive ring body, and the oil-blocking assembly includes multiple oil-blocking plates arranged circumferentially and combined to form a ring structure; one end of each oil-blocking plate has an upper overlapping portion, and the other end has a lower overlapping portion, with adjacent oil-blocking plates overlapping in the thickness direction through the upper and lower overlapping portions; by setting multiple oil-blocking plates... The oil-blocking assembly is formed by circumferentially arranged and combined oil-blocking plates. Each oil-blocking plate has an upper overlapping part at one end and a lower overlapping part at the other end. This allows adjacent oil-blocking plates to overlap in the thickness direction through the upper and lower overlapping parts. This not only realizes the segmented structure of the oil-blocking assembly, allowing each oil-blocking plate to float independently to adapt to the shaft diameter tolerance of the motor shaft and wear during operation, and always maintain a tight fit with the shaft surface, but also forms a labyrinth-like sealing path between the oil-blocking plates through the overlapping structure, avoiding the formation of vertical gaps. This effectively prevents external grease and dirt from seeping into the working area of ​​the conductive ring body, significantly improving the oil-proof performance and long-term operational reliability of the conductive ring. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the sandwich conductive ring provided in an embodiment of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the sandwich conductive ring provided in an embodiment of the present invention; Figure 3 This is an exploded view of the overall structure of the sandwich conductive ring provided in an embodiment of the present invention.

[0019] Figure label: 100. Shell; 110. Spring groove; 200. Conductive ring body; 210. Flexible conductor; 300, oil baffle; 310, upper overlapping part; 320, lower overlapping part; 330, positioning groove; 340, mounting groove 400, positioning pin; 500. Elastic components; 600. Cover plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] Example 1 like Figures 1 to 3 As shown, this embodiment provides a sandwich conductive ring, including a housing 100, a conductive ring body 200, and an oil baffle assembly.

[0028] The housing 100 serves as a structural component, connecting the internal conductive ring to the external pathway while also confining all components within the housing. The housing 100 can be integrally cast from metal or machined, and its specific shape can be adapted to the installation environment.

[0029] A conductive ring body 200 is disposed within the housing 100, and a flexible conductor 210 is arranged on the conductive ring body 200. The flexible conductor 210 is used to contact the motor shaft and transfer static electricity from the shaft to the housing 100. In this embodiment, the flexible conductor 210 can be made of materials such as conductive fibers, carbon fibers, or conductive plastics, and is characterized by its elasticity, softness, and good conductivity. The tail of the flexible conductor 210 can be treated with adhesive or tin to improve connection reliability. The conductive ring body 200 and the housing 100 can be connected by an interference fit, or they can be installed using a bracket.

[0030] An oil-blocking assembly is disposed on one or both sides of the conductive ring body 200. In this embodiment, the oil-blocking assembly is disposed on both sides of the conductive ring body 200, i.e., a double-sided arrangement. The oil-blocking assembly includes multiple oil-blocking plates 300, which are arranged circumferentially and combined to form a ring structure. The oil-blocking plates 300 are made of oil-resistant and wear-resistant materials such as graphite, composite materials, or polymer materials to prevent grease corrosion and wear.

[0031] like Figure 2 and Figure 3 As shown, one end of the oil baffle 300 is provided with an upper overlapping portion 310, and the other end is provided with a lower overlapping portion 320. Adjacent oil baffles 300 are stacked and overlapped in the thickness direction through the upper overlapping portion 310 and the lower overlapping portion 320 to form a labyrinth-like sealing structure. This stacked and overlapping structure can effectively prevent external grease and dirt from seeping into the working area of ​​the conductive ring body 200 along the gaps between the oil baffles 300.

[0032] Example 2 This embodiment further optimizes the structure of the conductive ring body 200 based on Embodiment 1.

[0033] like Figure 3As shown, the conductive ring body 200 is composed of multiple conductive ring pieces spliced ​​together circumferentially. Specifically, the conductive ring pieces are arc-shaped sheet structures, and multiple conductive ring pieces are spliced ​​together circumferentially around the motor shaft axis to form a ring. This segmented structure facilitates installation, maintenance, and replacement, while better adapting to the tolerance requirements of different shaft diameters.

[0034] Example 3 This embodiment further explains the arrangement of the oil baffle assembly based on Embodiment 1.

[0035] like Figure 1 and Figure 2 As shown, the oil-blocking assembly can be arranged on one side or both sides. When arranged on both sides, oil-blocking assemblies are provided on both sides of the conductive ring body 200, that is, an annular oil-blocking structure composed of multiple oil-blocking plates 300 is arranged on both sides of the conductive ring body 200. This double-sided arrangement can protect the working area of ​​the conductive ring body 200 from both sides simultaneously, and is suitable for application environments with heavy oil contamination.

[0036] Example 4 This embodiment adds a guide and limiting structure to the oil baffle 300 based on embodiment 1.

[0037] like Figure 3 As shown, a positioning groove 330 is provided on the housing 100, and a corresponding positioning pin 400 is provided on the oil baffle 300. The positioning pin 400 is slidably disposed within the positioning groove 330 to limit the movement trajectory of the oil baffle 300. Specifically, the positioning pin 400 can be fixedly disposed on the oil baffle 300, the positioning groove 330 is formed on the inner wall of the housing 100, and the positioning pin 400 extends into the positioning groove 330 and can slide along the positioning groove 330. Through the cooperation of the positioning pin 400 and the positioning groove 330, the movement direction and range of the oil baffle 300 can be precisely controlled, preventing the oil baffle 300 from deflecting or falling out during operation.

[0038] Furthermore, each oil baffle 300 is provided with two or more positioning pins 400, which respectively cooperate with the corresponding positioning grooves 330. The arrangement of multiple positioning pins 400 can better constrain the movement trajectory of the oil baffle 300 and ensure that it always maintains the correct movement posture.

[0039] Example 5 This embodiment adds an elastic element 500 to provide continuous clamping force, based on embodiment 1.

[0040] like Figure 2 and Figure 3As shown, the sandwich conductive ring also includes an elastic element 500. A spring groove 110 is formed on the housing 100. One end of the elastic element 500 is accommodated in the spring groove 110, and the other end abuts against a mounting groove 340 formed on the oil baffle 300. The elastic element 500 can be a compression spring or other elastic element, used to apply a thrust towards the motor shaft to the oil baffle 300. Under the action of the elastic element 500, the oil baffle 300 always maintains a tight fit with the surface of the motor shaft. Even if the oil baffle 300 wears during long-term use, the elastic element 500 can automatically compensate for the wear, ensuring the sealing effect between the oil baffle 300 and the shaft surface.

[0041] Example 6 This embodiment adds a cover plate 600 to fix the internal structure, based on embodiment 1.

[0042] like Figure 3 As shown, the sandwich conductive ring also includes a cover plate 600, which is bolted to the housing 100 to press the internal structure and ensure its stability. When the oil baffle assembly is arranged on both sides, cover plates 600 are provided on both sides of the housing 100 to press the oil baffle assembly and the conductive ring body 200 from both sides respectively.

[0043] Assembly and working principle This sandwich conductive ring is installed between the shaft and housing of the servo motor or frequency converter motor. During assembly, the flexible conductor 210 and the motor shaft are interference-fitted to ensure good electrical contact. Under the thrust of the elastic element 500, the oil baffle 300 always maintains a certain pressure on the shaft surface. Multiple oil baffles 300 are combined to form an annular sealing structure that matches the shaft diameter through the overlapping of the upper overlapping part 310 and the lower overlapping part 320.

[0044] When the motor is running, the static electricity generated by the rotation of the motor shaft is transferred to the conductive ring body 200 through the flexible conductor 210, and then to the housing 100 through the conductive ring body 200. Finally, the housing 100 is grounded or connected to an external path, thereby effectively eliminating the accumulation of static electricity on the shaft and preventing local overheating and bearing wear caused by static electricity discharge through the bearing.

[0045] Meanwhile, grease seeping from the motor bearings, as well as high-viscosity substances formed by the mixture of grease and dirt in the environment, are blocked by the oil baffle 300. Because the oil baffle 300 adopts a segmented structure, each oil baffle 300 can float independently, automatically adapting to shaft diameter tolerances and wear during operation, always maintaining a tight fit with the shaft surface. The upper overlapping portion 310 and the lower overlapping portion 320 between adjacent oil baffles 300 overlap, forming a labyrinthine sealing path, further enhancing the sealing effect and ensuring that grease and dirt cannot penetrate into the working area of ​​the conductive ring body 200, thereby guaranteeing the long-term reliable operation of the conductive ring.

[0046] In summary, the sandwich conductive ring provided by this invention, through its segmented oil baffle structure and overlapping sealing design, effectively solves the technical problems in the prior art where the integrated oil baffle cannot automatically compensate for wear, is difficult to adapt to shaft diameter tolerances, and is prone to oil contamination in the conductive area, thus significantly improving the oil contamination resistance and long-term operational reliability of the conductive ring.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sandwich conductive ring for use between a motor shaft and a motor housing, characterized in that, include: case; A conductive ring body is disposed inside the housing, and a flexible conductor is arranged on the conductive ring body. The flexible conductor is used to contact the motor shaft and transfer the static electricity of the shaft to the housing. An oil-blocking assembly is disposed on one or both sides of the conductive ring body. The oil-blocking assembly includes multiple oil-blocking plates, which are arranged circumferentially and combined to form a ring structure. The oil baffle has an upper overlapping portion at one end and a lower overlapping portion at the other end. Adjacent oil baffles are stacked and overlapped in the thickness direction through the upper overlapping portion and the lower overlapping portion.

2. The sandwich conductive ring according to claim 1, characterized in that, The conductive ring body is composed of multiple conductive ring pieces spliced ​​together circumferentially.

3. The sandwich conductive ring according to claim 2, characterized in that, The conductive ring is an arc-shaped sheet structure, and multiple conductive rings are spliced ​​together circumferentially around the motor shaft to form a ring.

4. The sandwich conductive ring according to claim 1, characterized in that, The flexible conductor is a conductive fiber, carbon fiber, or conductive plastic.

5. The sandwich conductive ring according to claim 1, characterized in that, The oil-blocking assembly can be arranged on one side or on both sides. When it is arranged on both sides, the oil-blocking assembly is provided on both sides of the conductive ring body.

6. The sandwich conductive ring according to any one of claims 1-5, characterized in that, The housing is provided with a positioning groove, and the oil baffle is provided with a corresponding positioning pin. The positioning pin is slidably disposed in the positioning groove to limit the movement trajectory of the oil baffle.

7. The conductive ring according to claim 6, characterized in that, Each of the oil baffles is provided with two or more positioning pins, which respectively cooperate with the corresponding positioning grooves.

8. The sandwich conductive ring according to any one of claims 1-5, characterized in that, It also includes an elastic element, on which a spring groove is provided. One end of the elastic element is accommodated in the spring groove, and the other end abuts against a mounting groove provided on the oil baffle, for applying a thrust toward the motor shaft to the oil baffle.

9. The sandwich conductive ring according to claim 1, characterized in that, It also includes a cover plate, which is bolted to the housing to press the internal structure. When the oil baffle assembly is arranged on both sides, the cover plate is provided on both sides of the housing.

10. The sandwich conductive ring according to claim 1, characterized in that, The oil baffle is made of graphite, composite material or polymer material.

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