Auxiliary tool for copper plating of inner ring of thrust bearing
By designing auxiliary tooling for the inner ring of the thrust bearing and utilizing a combination of an insulating outer cylinder and a copper electrode tube, simple and efficient copper plating of the inner ring of the thrust bearing is achieved, solving the problems of cumbersome copper plating maintenance and copper waste in the existing technology and improving the efficiency and quality of copper plating.
Patent Information
- Application Number
- CN202422763052.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-12
AI Technical Summary
In the prior art, the copper plating maintenance process of the inner ring of the thrust bearing is cumbersome, resulting in copper waste and increased maintenance time, and the copper plating quality is unstable.
An auxiliary tooling for the inner ring of a thrust bearing was designed, including an insulating outer cylinder, an annular end cover, and a copper electrode tube. The bearing was sealed in the cavity by an insulating sealing gasket and a conductive silicone gasket, and the inner wall of the inner ring was electroplated using the copper electrode tube to avoid disassembly of the bearing.
It simplifies the copper plating operation, reduces maintenance time, improves copper plating efficiency, and ensures the uniformity and stability of copper plating quality.
Smart Images
Figure CN223386269U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of copper plating of bearing inner rings, in particular to auxiliary tooling for copper plating of thrust bearing inner rings. Background Art
[0002] The inner ring of a typical thrust bearing does not require copper plating, as the materials used in the design have already taken wear resistance and corrosion resistance into consideration. The current materials and structural designs of bearing inner rings are sufficient to handle most operating conditions.
[0003] However, in some special equipment and special environments, it is necessary to copper-plate the assembly ring surface of the inner ring of the thrust bearing. This type of bearing is characterized by strong load-bearing capacity and strong impact resistance.
[0004] However, when maintaining the equipment, parts need to be removed for cleaning and maintenance, and the thrust bearings in the equipment also need to be maintained separately. Generally, the thrust bearings are cleaned and the inner ring wall is copper-plated. However, copper plating maintenance is currently very difficult, and there are generally two options: first, these bearings are sent back to the bearing manufacturer and commissioned to be re-coppered for maintenance; second, the factory directly disassembles these bearings, clads the inner ring surface except the inner ring wall, and then places them in an electroplating bath for copper plating. The first method requires a long wait, while the second method requires the factory to completely disassemble the thrust bearing and then copper-plated the inner ring, which is also very time-consuming (increasing the maintenance time of the entire equipment).
[0005] Based on this, our company has designed a tool for copper plating the inner wall of the inner ring of the thrust bearing, which is particularly suitable for the maintenance of the thrust bearing during the maintenance of a certain equipment. Utility Model Content
[0006] The purpose of the utility model is to overcome the shortcomings of the prior art, provide an auxiliary tooling for copper plating of the inner ring of a thrust bearing, and solve the problems of copper waste and inconvenience in copper plating during maintenance of the existing thrust bearing.
[0007] It should be noted that when performing maintenance on some large equipment, the thrust bearings within these devices also need to be maintained. For example, if the inner wall of the inner ring of a thrust bearing is copper-plated, it needs to be re-coppered. Currently, the method for copper plating the inner wall of the inner ring of such thrust bearings is very simple: the entire bearing is disassembled, and the end face and outer ring surface of the inner ring are wrapped with tape. The inner ring is then placed alone in a plating bath to complete the copper plating. This leads to the following problems: a. The entire bearing needs to be disassembled before copper plating, and reinstalling it after copper plating is complete is very cumbersome; b. The adhesive tape loses its viscosity in a stable electroplating bath environment and easily falls off, causing the plating liquid to seep into the end face and outer ring surface of the bearing, affecting the copper plating quality.
[0008] Therefore, the purpose of the present invention is to avoid copper waste, reduce the time of bearing maintenance, and strive to make bearing maintenance simpler and more convenient.
[0009] The purpose of this utility model is achieved through the following technical solutions:
[0010] First, an auxiliary tooling for copper plating of the inner ring of a thrust bearing, wherein the thrust bearing is formed by an outer ring, a ball, and an inner ring, and the three can be in contact and conductive, including an insulating outer cylinder, an annular end cover, and a copper electrode tube;
[0011] The lower inner wall of the insulating outer cylinder is provided with a stepped surface, a plurality of bearings are placed in the insulating outer cylinder, and the corresponding bearings are pressed onto the stepped surface by using an annular end cover;
[0012] Between adjacent bearings, an annular insulating sealing gasket is provided between the inner rings, and an annular conductive silicone gasket is provided between the outer rings; a corresponding annular insulating sealing gasket is also provided between the inner ring of the bearing and the corresponding annular end cover and the press-fit surface of the step surface; a corresponding annular conductive silicone gasket is also provided between the outer ring of the bearing and the press-fit surface of the annular end cover and the step surface;
[0013] The insulating outer cylinder and the annular end cover are also provided with a sealing ring, and the balls and the outer ring can be sealed in a closed cavity through the insulating outer cylinder, the annular end cover, the sealing ring, the inner ring and the insulating sealing gasket;
[0014] The copper electrode tube is arranged at the central axis of the insulating outer cylinder through an insulating bracket; an electrode connector is arranged on the annular end cap at the upper end of the insulating outer cylinder; the copper electrode tube and the electrode connector are respectively connected to the corresponding positive electrode and negative electrode;
[0015] When powered on, the electrode connector can be electrically connected to the outer ring, ball bearings, and inner ring through the corresponding conductive silicone pads;
[0016] When the entire tooling is assembled, when there is conductive liquid in the cavity between the copper electrode tube and the inner ring, the inner walls of the inner rings of multiple bearings can be evenly copper plated.
[0017] The second aspect is an auxiliary tooling for copper plating of the inner ring of the thrust bearing, which is based on the structure of the first aspect: a rubber sealing plug is provided at the lower end of the insulating outer cylinder, so that a cavity capable of holding liquid is formed between the inner ring and the copper electrode tube; the conductive liquid is poured into the cavity and the copper plating is directly completed after power is applied.
[0018] Based on the first aspect or the second aspect, as a preferred technical solution of the present application, the lower end of the insulating outer cylinder is also provided with a corresponding annular end cover, and the upper annular surface of the annular end cover is a step surface.
[0019] Based on the first or second aspect, as the preferred technical solution of the present application, the insulating outer cylinder is adapted to the outer ring of the bearing, and the spacing between the outer cylindrical surface of the copper electrode tube and various parts of the inner ring of each bearing is consistent, forming a structure that ensures a uniform copper plating layer on the inner ring.
[0020] Based on the first aspect or the second aspect, as the preferred technical solution of the present application, a plurality of through holes are opened on the tube wall of the copper electrode tube, and the upper end of the copper electrode tube has a conical tube cavity; the conductive liquid is added through the conical tube cavity, and the conductive liquid is allowed to flow through the through holes into the cavity between the inner ring and the outer cylindrical surface of the copper electrode tube.
[0021] Based on the first or second aspect, as the preferred technical solution of this application, the power supply of the annular end cover is designed as follows:
[0022] The annular end cap is a conductive end cap, and the electrode connector is electrically connected to the outer ring, the ball, and the inner ring through the annular end cap and the corresponding conductive silicone pad;
[0023] Alternatively, the annular end cap is a non-conductive end cap; an annular conductive coating is provided at the end face of the annular end cap, and a wire is embedded in the annular end cap, which electrically connects the electrode connector to the conductive coating; the annular conductive coating on the annular end cap is pressed onto the corresponding conductive silicone pad.
[0024] Based on the first or second aspect, as a preferred technical solution of the present application, the annular end cap includes a short barrel having an outward-turning horizontal flange at its outer end and an inward-turning horizontal flange at its inner end. The short barrel is adapted to fit over the insulating outer barrel with a sealing ring disposed therebetween. The outward-turning horizontal flange is screwed to the end face of the insulating outer barrel, while the inward-turning horizontal flange is pressed against the outer ring via a conductive silicone pad and against the inner ring via an insulating sealing pad.
[0025] For ease of understanding, the core design points of this solution are explained:
[0026] 1. The working principle and working process of the first aspect above;
[0027] Principle and process: a. Install multiple bearings in an insulating outer cylinder, and block both ends with annular end covers. Insulating sealing pads are provided between the inner rings of the bearings, and conductive silicone pads are provided between the inner rings of the bearings. In addition, insulating sealing pads are provided between the inner rings and the annular end covers, and conductive silicone pads are also provided between the outer rings and the annular end covers, and a sealing ring is provided between the annular end cover and the insulating outer cylinder; b. Therefore, for the bearing with the insulating outer cylinder, only the inner wall of the inner ring is exposed, and the rest of the bearing is sealed. Then, a copper electrode tube is placed in the center of the insulating outer cylinder, so that the copper electrode tube, A plating cavity is formed between the inner wall of the inner ring; c. When the entire assembled tooling is placed in the electroplating tank, the copper electrode tube and electrode connector are connected to the positive and negative poles of the power supply respectively. Thus, a negative pole is formed on the annular inner wall of the inner ring of the bearing of the insulating outer cylinder. The outer cylindrical surface of the copper electrode tube forms the negative pole, and the outer cylindrical surface of the copper electrode tube is located at the center of the annular inner wall of the bearing inner ring, so that the inner wall of the inner ring can be well electroplated (when placed in the electroplating tank, the remaining parts of the bearing, such as the outer ring, balls, outer ring edge of the inner ring, and end face of the inner ring will not be copper-plated, reducing copper consumption);
[0028] Effect: When maintaining the thrust bearing, there is no need to disassemble the inner ring, ball and outer ring of the entire bearing. You only need to clean and install these bearings in the insulating outer cylinder. After assembly, put it in the electroplating tank. Maintenance is very simple and convenient.
[0029] 2. The working principle and working process of the second aspect above;
[0030] In terms of principle and working process: Similarly, the same structure as the first aspect can be formed - only the inner wall of the inner ring of the bearing is allowed to leak; the difference is that the bottom of the insulating outer cylinder is blocked by a rubber sealing plug, so that a cavity capable of holding liquid is formed between the inner ring and the copper electrode tube; during operation, the conductive liquid is poured into the cavity and the power is applied, and the copper plating is directly completed;
[0031] Effect: When copper plating maintenance is performed on the inner wall of the inner ring of the thrust bearing in the factory, after cleaning is completed and the entire auxiliary tooling is assembled (the bottom is blocked by a rubber sealing plug), there is no need to put it in a special electroplating tank. Just pour conductive liquid into the tooling and then power it on to complete the electroplating. This is very suitable for actual maintenance situations in the factory.
[0032] The utility model has the following advantages:
[0033] The copper plating maintenance time of the thrust bearing is reduced and the maintenance efficiency is improved; and the operation is simple and convenient.
[0034] Traditionally, when copper plating the inner ring of a thrust bearing is performed, the entire bearing is disassembled, and the end face and outer ring surface of the inner ring are covered with tape, leaving only the inner ring surface exposed. The copper plating is then performed (the thickness of the copper plating directly affects the performance of the bearing and is typically between 0.01mm and 0.05mm). Disassembly, copper plating, and reassembly are time-consuming.
[0035] In one copper plating method of this solution, if only the inner ring of the bearing needs to be copper-plated and no other maintenance work is required on the bearing: multiple bearings can be directly installed in an insulating outer cylinder, and then the entire device is placed in the electroplating tank to complete the copper plating. Since the bearings do not need to be disassembled and multiple bearings can be installed at one time, the copper plating maintenance efficiency is greatly improved. The entire copper plating process is very simple and convenient, and is very suitable for the actual copper plating maintenance work of bearings in factories.
[0036] In another copper plating method of this scheme, if only the inner ring of the bearing needs to be copper-plated for maintenance and no other maintenance work is required on the bearing: directly install multiple bearings in the insulating outer cylinder, then plug the bottom of the tooling with a rubber sealing plug, and then pour the conductive liquid into the tooling (into the cavity formed between the inner ring and the copper electrode tube). There is no need to place the bearing in the electroplating tank, and the electroplating maintenance work can be completed directly on the factory floor, which is also very simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0037] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model;
[0038] Figure 2 This is a cross-sectional view of the first embodiment of the present invention (part of the conductive sealing gasket is not shown);
[0039] Figure 3 It is a schematic structural diagram of the displacement block of the annular end cover structure including the horizontal part B and the vertical part B;
[0040] Figure 4 It is a structural diagram of the utility model;
[0041] Figure 5 It is a structural diagram of the utility model;
[0042] In the figure: 10-insulating outer cylinder, 20-annular end cap, 30-copper electrode tube, 301-through hole;
[0043] 1-Insulating sealing pad, 2-Conductive sealing pad, 3-Insulating bracket, 4-Electrode connector, 5-Sealing ring. DETAILED DESCRIPTION
[0044] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.
[0045] It should be noted that the directions or positional relationships indicated by "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use, or are the directions or positional relationships commonly understood by those skilled in the art. Such terms are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model.
[0046] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.
[0047] What is needed is that in some special equipment, thrust bearings with copper-plated inner ring walls are used (this type of bearing includes an outer ring, balls, and an inner ring, and copper is plated on the inner ring wall of the inner ring). This type of thrust bearing has a greater load-bearing capacity and better impact resistance. When maintaining these devices, it is also necessary to check whether the copper plating on the inner ring of the thrust bearing is worn and whether maintenance and repair are required (generally, there is no need to completely disassemble the bearing, balls, and inner ring. It is only necessary to simply clean the inner wall of the inner ring and re-polish and copper-plate it; of course, this does not mean that the bearing does not need to be completely disassembled for maintenance. The present invention is only aimed at situations where the bearing does not need to be disassembled for dust removal).
[0048] However, traditionally, grinding and copper plating the inner ring requires first disassembling the entire bearing, then applying tape to the inner ring end face and outer ring, and then placing the inner ring in a plating bath for copper plating. This results in a lengthy and inconvenient bearing maintenance process. Furthermore, the tape easily loses its stickiness in high-temperature liquid environments, causing the copper layer to seep into the inner ring end face and outer ring.
[0049] Based on the above situation, the present invention provides an auxiliary tooling for copper plating of the inner ring of a thrust bearing, which makes the copper plating operation very convenient, saves copper plating time, and improves copper plating efficiency.
[0050] First, see Figures 1 to 5 , a specific embodiment of the present invention provides an auxiliary tooling for copper plating of the inner ring of a thrust bearing, comprising an insulating outer cylinder 10, an annular end cover 20, and a copper electrode tube 30;
[0051] The insulating outer cylinder 10 has a stepped surface on its lower inner wall. Multiple bearings are mounted within the insulating outer cylinder 10, and an annular end cap 20 is used to press the corresponding bearings onto the stepped surface. Furthermore, between adjacent bearings, an annular insulating sealing gasket 1 is provided between the inner rings, and an annular conductive silicone gasket 2 is provided between the outer rings. Furthermore, a corresponding annular insulating sealing gasket 1 is provided between the inner rings of the bearings, the corresponding annular end cap 20, and the pressed surface of the stepped surface. A corresponding annular conductive silicone gasket 2 is also provided between the outer rings of the bearings, the pressed surface of the annular end cap 20, and the pressed surface of the stepped surface.
[0052] In addition, the insulating outer cylinder 10 and the annular end cover 20 are further provided with a sealing ring 5. The insulating outer cylinder 10, the annular end cover 20, the sealing ring 5, the inner ring, and the insulating sealing gasket 1 can seal the ball and the outer ring in a closed cavity.
[0053] The copper electrode tube 30 is arranged at the central axis of the insulating outer tube 10 through the insulating bracket 3; the electrode connector 4 is provided on the annular end cap 20 at the upper end of the insulating outer tube 30; the copper electrode tube 30 and the electrode connector 4 are respectively connected to the corresponding positive electrode and negative electrode;
[0054] When power is turned on, the electrode connector 4 passes through the corresponding conductive silicone pad 2 and the outer ring and ball, so that the inner wall surface of the inner ring becomes the negative electrode surface, and the outer cylindrical surface of the copper electrode tube 30 becomes the positive electrode surface. The distance from the positive electrode surface to the negative electrode surface is consistent in the circumferential direction; therefore, when the entire tooling is assembled, when there is conductive liquid in the cavity between the copper electrode tube 30 and the inner ring, the inner walls of the inner rings of multiple bearings can be evenly copper-plated.
[0055] It should be noted that, in the above-mentioned copper electroplating method, since the entire bearing does not need to be disassembled and multiple bearings can be installed in the outer tube 10 at one time, the copper plating operation is simple and the copper plating efficiency is very high.
[0056] In some advantageous embodiments, there are various design options for providing a stepped surface on the inner wall of the lower end of the insulating outer cylinder 10: for example, a corresponding annular end cover 20 is also provided at the lower end of the insulating outer cylinder 10, and the upper annular surface of the annular end cover 20 is the stepped surface; for another example, an integral stepped surface can be directly formed on the inner wall of the lower end of the insulating outer cylinder 10 (which can be formed by turning).
[0057] In some advantageous embodiments, the structure of the annular end cap 20 is preferably designed.
[0058] Specifically, see Figures 3 to 5The annular end cap 20 comprises a short barrel section with an outward-turning horizontal flange on the outer end and an inward-turning horizontal flange on the inner end. The short barrel section fits snugly within the insulating outer barrel 10, with a sealing ring 5 positioned between them. The outward-turning horizontal flange is screwed to the end face of the insulating outer barrel 10, while the inward-turning horizontal flange is pressed against the outer ring via a conductive silicone pad 2 and against the inner ring via an insulating sealing pad 1. This ensures the coaxiality of the annular end cap 20 and the insulating outer barrel 10.
[0059] The design of the electrical connection in the annular end cap 20 is further described. There are various ways to implement this design. For example, the annular end cap 20 may be conductive, with the electrode connector 4 electrically connected to the outer ring, ball bearing, and inner ring via the annular end cap 20 and the corresponding conductive silicone pad 2. Another example is a non-conductive end cap. An annular conductive coating may be provided on the end face of the annular end cap 20, with a wire embedded in the annular end cap 20 to electrically connect the electrode connector to the conductive coating. Alternatively, the annular conductive coating on the annular end cap 20 may be pressed against the corresponding conductive silicone pad 2.
[0060] In some advantageous embodiments, the insulating bracket 3 and annular end cap 20 are designed based on the specific structure of the annular end cap 20 described above. The inner wall of the short section of the annular end cap 20 has a step. The insulating bracket 3 is shaped like a horizontal beam, with both ends of the insulating bracket 3 resting on the step and secured with screws. A central hole is formed in the insulating bracket 3, and a copper electrode tube 30 is placed above the hole.
[0061] In some advantageous embodiments, the copper electrode tube 30 is further described. The copper electrode tube 30 is tubular, with a large end at its upper end and a tube portion at its lower end. The large end has a tapered tube cavity, and the tube portion has multiple through-holes 301. When conductive liquid is added between the copper electrode tube 30 and the inner ring, the conductive liquid is added through the tapered cavity and allowed to flow through the through-holes 301 into the cavity between the inner ring and the outer cylindrical surface of the copper electrode tube 30. This ensures uniform electroplating across all locations on the inner ring. (Alternative methods of adding plating liquid, such as directly pouring the conductive liquid into the cavity between the inner ring and the copper electrode tube, with the inner ring first being the first to be plated, may result in slightly thicker copper plating. However, this method of adding liquid in this embodiment allows the entire circumference of the inner ring to be exposed to the conductive liquid simultaneously, thus achieving uniform copper plating.)
[0062] In a second aspect, based on the structure of the first aspect, a specific embodiment of the present invention further discloses an auxiliary tooling for copper plating of the inner ring of a thrust bearing.
[0063] Specifically, a rubber sealing plug is installed at the lower end of the insulating outer cylinder, creating a liquid-holding cavity between the inner ring and the copper electrode tube. Conductive liquid is poured into this cavity, and after power is applied, copper plating is directly completed. During actual factory maintenance, bearings are cleaned, assembled, and placed directly on the ground. Then, conductive liquid is poured in, and copper plating is performed. This method is highly suitable for actual factory maintenance environments.
[0064] The above embodiments merely represent preferred implementations, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art will be able to make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.
Claims
1. Auxiliary tooling for copper plating of the inner ring of a thrust bearing. The thrust bearing is formed by an outer ring, a ball, and an inner ring, and the three can contact and conduct electricity. The characteristics are: It comprises an insulating outer cylinder (10), an annular end cover (20), and a copper electrode tube (30); The lower inner wall of the insulating outer cylinder (10) is provided with a stepped surface, a plurality of bearings are placed in the insulating outer cylinder (10), and an annular end cover (20) is used to press the corresponding bearings onto the stepped surface; Between adjacent bearings, an annular insulating sealing gasket (1) is provided between the inner rings, and an annular conductive silicone gasket (2) is provided between the outer rings; a corresponding annular insulating sealing gasket (1) is also provided between the inner ring of the bearing, the corresponding annular end cover (20) and the pressing surface of the step surface; a corresponding annular conductive silicone gasket (2) is also provided between the outer ring of the bearing, the annular end cover (20) and the pressing surface of the step surface; The insulating outer cylinder (10) and the annular end cover (20) are further provided with a sealing ring (5), and the balls and the outer ring can be sealed in a closed cavity through the insulating outer cylinder (10), the annular end cover (20), the sealing ring (5), the inner ring, and the insulating sealing gasket (1); The copper electrode tube (30) is arranged at the central axis of the insulating outer cylinder (10) through an insulating bracket (3); an electrode connector (4) is provided on the annular end cover (20) at the upper end of the insulating outer cylinder (10); the copper electrode tube (30) and the electrode connector (4) are respectively connected to the corresponding positive electrode and negative electrode; When powered on, the electrode connector (4) can be electrically connected to the outer ring, the ball, and the inner ring via the corresponding conductive silicone pad (2); When the entire tooling is assembled, and when there is conductive liquid in the cavity between the copper electrode tube (30) and the inner ring, the inner walls of the inner rings of multiple bearings can be evenly copper plated.
2. An auxiliary tooling for copper plating of the inner ring of a thrust bearing, adopting the structure of the auxiliary tooling as claimed in claim 1, characterized in that: A rubber sealing plug is provided at the lower end of the insulating outer cylinder (10), so that a cavity capable of containing liquid is formed between the inner ring and the copper electrode tube (30); after the conductive liquid is poured into the cavity and energized, copper plating is directly completed.
3. The auxiliary tooling for copper plating of the inner ring of a thrust bearing according to claim 1 or 2, characterized in that: The lower end of the insulating outer cylinder (10) is also provided with a corresponding annular end cover (20), and the upper annular surface of the annular end cover (20) is a stepped surface.
4. The auxiliary tooling for copper plating of the inner ring of a thrust bearing according to claim 1 or 2, characterized in that: The insulating outer cylinder (10) is adapted to the outer ring of the bearing, and the distances between the outer cylindrical surface of the copper electrode tube (30) and various parts of the inner ring of each bearing are consistent, forming a structure that ensures a uniform copper plating layer on the inner ring.
5. The auxiliary tooling for copper plating of the inner ring of a thrust bearing according to claim 1 or 2, characterized in that: The copper electrode tube (30) has a plurality of through holes (301) formed on its wall, and a tapered tube cavity is formed at the upper end of the copper electrode tube (30); Conductive liquid is added through the conical valve cavity and allowed to flow through the through hole (301) into the cavity between the inner ring and the outer cylindrical surface of the copper electrode tube (30).
6. The auxiliary tooling for copper plating of the inner ring of a thrust bearing according to claim 1 or 2, characterized in that: The annular end cap (20) is a conductive end cap, and the electrode connector (4) is electrically connected to the outer ring, the ball, and the inner ring via the annular end cap (20) and the corresponding conductive silicone pad (2).
7. The auxiliary tooling for copper plating of the inner ring of a thrust bearing according to claim 1 or 2, characterized in that: The annular end cap (20) is a non-conductive end cap; an annular conductive coating is provided at the end surface of the annular end cap (20); a wire is embedded in the annular end cap (20), and the wire electrically connects the electrode connector to the conductive coating; The annular conductive coating on the annular end cover (20) is pressed onto the corresponding conductive silicone pad (2).
8. The auxiliary tooling for copper plating of the inner ring of a thrust bearing according to claim 3, characterized in that: The annular end cap (20) comprises a short section barrel, wherein the outer end of the short section barrel has an outward-turned horizontal flange, and the inner end of the short section barrel has an inward-turned horizontal flange; The short section cylinder is matched with the insulating outer cylinder (10) and a sealing ring (5) is provided between the two. The outward-turned horizontal flange is fixed to the end face of the insulating outer cylinder (10) via a screw, and the inward-turned horizontal flange structure is pressed onto the outer ring via a conductive silicone pad (2) and onto the inner ring via an insulating sealing pad (1).