A rolled bearing with internal and external conductive structures
By employing a multi-layer composite structure and conductive mesh design in the rolled bearing, internal and external conductive channels are formed, solving the problem of insufficient conductivity in traditional rolled bearings. This achieves a balance between low friction and conductivity, making it suitable for high loads and current flow requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG CHANGSHENG SLIDING BEARINGS
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-30
AI Technical Summary
Traditional rolled bearings have insufficient electrical conductivity, which cannot simultaneously meet the requirements of low friction and electrical conductivity. Furthermore, metal-based bearings are expensive, and existing bearings cannot simultaneously achieve the functions of high load, low friction, and current conduction.
Design a rolled bearing with internal and external conductive structures. The bearing adopts a multi-layer composite structure, including a low-friction layer and a conductive mesh. By setting the conductive mesh on the low-friction layer and forming extension sections and bending sections in the through holes, a conductive channel connecting the inner and outer sides is formed. The conductive channel is formed by utilizing the ductility of the conductive mesh and the punching process.
This invention achieves the combination of low-friction materials and conductive materials, ensuring that the bearing has good conductivity under high loads, while reducing costs and making it suitable for space-constrained scenarios.
Smart Images
Figure CN224433140U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of conductive bearing technology, and in particular to a rolled bearing with internal and external conductive structures. Background Technology
[0002] In electric vehicle drive motors, industrial robot joints, precision transmission systems for 5G communication equipment, and aerospace servo mechanisms, bearings not only need to withstand high loads and low friction mechanical stresses, but also need to ensure the function of current transmission.
[0003] Rolled bearings are a type of bearing manufactured by rolling sheet metal into shape and then welding / riveting it. They are widely used in space-constrained applications due to their compact structure, lightweight design, and low cost. However, traditional rolled bearings generally have insufficient electrical conductivity. Traditional plastic-based bearings are insulators and cannot conduct current at all, while metal-based bearings, although conductive overall, are expensive and less durable than bearings made from low-friction materials. Therefore, a bearing that combines low-friction and conductive materials and has an internal and external conductive structure is needed. Utility Model Content
[0004] In view of this, the present invention provides a rolled bearing with internal and external conductive structures to solve the above-mentioned technical problems.
[0005] A rolled bearing with an internal and external conductive structure includes a body and at least one through hole disposed on the body. The body is a multi-layer composite structure, including a low-friction layer and at least one conductive mesh disposed on the low-friction layer. The conductive mesh fills the low-friction layer and is uniformly exposed on one end face of the low-friction layer. One end of the low-friction layer with the conductive mesh is a conductive surface, and the other opposite end face is a non-conductive surface. The through hole is formed by punching the body. The through hole has multiple extension segments extending from the conductive mesh and multiple bent segments disposed at one end of the extension segments. The extension segments pass through the through hole and extend to the non-conductive surface. The bent segments are bent and connected to the extension segments and are close to the non-conductive surface. The length of the extension segments is greater than the depth of the through hole to form a conductive channel connecting the inner and outer sides of the body.
[0006] Furthermore, the body includes a bushing with a hollow cylindrical structure and a flange disposed at one end of the bushing, the bushing and the flange being integrally formed.
[0007] Furthermore, the conductive mesh has a plurality of arrayed mesh openings, the mesh openings being diamond-shaped.
[0008] Furthermore, the extension section is formed by tensile deformation during the punching of the conductive mesh.
[0009] Furthermore, the through-hole covers at least one wire mesh of the conductive mesh.
[0010] Furthermore, the conductive mesh is woven in a warp and weft pattern or directly punched and stretched.
[0011] Furthermore, the extension section is formed by the stretching and deformation of the wires during the punching of the conductive mesh.
[0012] Compared with the prior art, the present invention provides a rolled bearing with an internal and external conductive structure. The body of the bearing is a multi-layer composite structure, including a low-friction layer and at least one conductive mesh disposed on the low-friction layer. The through hole is provided with multiple extension segments extending from the conductive mesh and multiple bent segments disposed at one end of the extension segments. The extension segments pass through the through hole and extend to the non-conductive surface. The bent segments are bent and connected to the extension segments and closely attached to the non-conductive surface. The length of the extension segments is greater than the depth of the through hole, thereby forming a conductive channel connecting the inner and outer sides of the bearing body. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of a rolled bearing with internal and external conductive structures provided by this utility model.
[0014] Figure 2 for Figure 1 A cross-sectional view of a rolled bearing with internal and external conductive structures. Detailed Implementation
[0015] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.
[0016] like Figures 1 to 2 The diagram shown is a structural schematic of a rolled bearing with an internal and external conductive structure provided by this utility model. The rolled bearing with an internal and external conductive structure includes a body 10 and at least one through hole 20 disposed on the body 10. It is conceivable that the rolled bearing with an internal and external conductive structure also includes other functional structures, such as a connecting layer and a lubricant, etc., which are technologies known to those skilled in the art and will not be described in detail here.
[0017] The body 10 includes a bushing 11 with a hollow cylindrical structure and a flange 12 disposed at one end of the bushing 11. The bushing 11 and the flange 12 are integrally formed.
[0018] The body 10 is a multi-layer composite structure. After processing, the bushing 11 and the flange 12 are formed by rolling and flanging. The body 10 includes a low-friction layer 13 and at least one conductive mesh 14 disposed on the low-friction layer 13.
[0019] The low-friction layer 13 is made of a low-friction material such as PTFE, PEEK, and POE, thus having a very low coefficient of friction, suitable for the high-speed rotation or reciprocating motion of the bushing. The conductive mesh 14 fills the low-friction layer 13, and the conductive mesh 14 is uniformly exposed on one end face of the low-friction layer 11. The conductive mesh 14 has multiple arrayed mesh holes, which are diamond-shaped. The conductive mesh 14 can be woven in a warp-weft interlacing manner or directly punched and stretched. One end of the low-friction layer 13 with the conductive mesh 14 is a conductive surface 15, and the other opposite end face is a non-conductive surface 16. The conductive surface 15 is located on the outer wall of the body 10, and the non-conductive surface 16 is located on the inner wall of the body 10. The conductive surface 15 is used to contact external workpieces, thereby achieving a conductive connection on the outside of the bearing.
[0020] The through hole 20 is formed by punching the body 10, and the punching direction must be from the conductive surface 15 to the non-conductive surface 16. The through hole 20 is provided with a plurality of extension segments 17 extending from the conductive mesh 14, and a plurality of bent segments 18 provided at one end of the extension segments 17. The extension segments 17 pass through the through hole 20 and extend to the non-conductive surface 16. The bent segments 18 are bent and connected to the extension segments 17 and are close to the non-conductive surface 16. The length of the extension segment 17 is greater than the depth of the through hole 20 to ensure that the extension segment 17 extends out of the through hole 20 and contacts the workpiece inside the bushing, thereby forming a conductive channel connecting the inside and outside of the body 10.
[0021] The extension 17 is formed by stretching and deforming the wires of the conductive mesh 14 during punching. The conductive mesh 14 is mesh-like, so the extension 17 becomes filamentous after stretching and deformation. Specifically, during punching in the direction from the conductive surface 15 to the non-conductive surface 16, the low-friction layer 13 and the conductive mesh 14 are punched apart by the punch. The conductive mesh 14 undergoes plastic deformation due to compression, and the wires of the conductive mesh 14 located in the through hole 20 extend along the inner wall of the through hole 20 to the non-conductive surface 16 to form the extension 17, so that the inner side of the bearing also has conductive contacts, thereby allowing the inner and outer workpieces fitted on the body 10 to carry current. The bent section 18 is formed by folding and deforming the extension section 17 to extend out of the through hole 20. The thickness of the bent section 18 should be controlled within a range that does not affect the flatness of the bearing inner wall. Subsequent post-processing, such as rolling, can be performed to reduce the thickness of the protrusion, ensuring that the bent section 18 does not affect the friction performance of the bearing. At the same time, the diameter of the wires of the conductive mesh 14 is relatively thin, which will not affect the bearing performance.
[0022] The conductive mesh 14 is made of a highly ductile conductive metal with an elongation of ≥15%, ensuring that the conductive mesh 14 at the through hole 20 has sufficient mechanical strength and ductility to extend to the non-conductive surface 16 of the low-friction layer 13 without breaking midway. The low-friction layer 13, due to its lower elongation, will be punched away when a punching force is applied to it. The through hole 20 is positioned to cover at least one section of the conductive mesh 14, ensuring that the inner wall of the through hole 20 is covered by at least two extension sections 17.
[0023] It is conceivable that the conditions during the punching process should be designed to remove the low-friction layer 13 and extend the conductive mesh 14 to the non-conductive surface 16. For example, a certain gap should be left between the punch and the die to ensure the extension effect of the extension section 17. If the gap between the outer wall of the punch and the inner wall of the die is too small, the extension section 17 will not have enough space to deform, resulting in its breakage. Furthermore, the punch speed and force should also be controlled according to actual needs, which should be existing technology and will not be elaborated here.
[0024] Compared with the prior art, the present invention provides a multi-layer composite structure for a rolled bearing with an internal and external conductive structure, comprising a low-friction layer 13 and at least one conductive mesh 14 disposed on the low-friction layer 13. The through-hole 20 is provided with multiple extension segments 17 extending from the conductive mesh 14, and multiple bent segments 18 disposed at one end of the extension segments 17. The extension segments 17 pass through the through-hole 20 and extend to the non-conductive surface 16. The bent segments 18 are bent and connected to the extension segments 17 and closely adhere to the non-conductive surface 16. The length of the extension segments 17 is greater than the depth of the through-hole 20, thereby forming a conductive channel connecting the inner and outer sides of the body 10.
[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.
Claims
1. A convoluted bearing having an inner and outer conductive structure, characterized by: The rolled bearing with internal and external conductive structure includes a body and at least one through hole disposed on the body. The body is a multi-layer composite structure, including a low-friction layer and at least one conductive mesh disposed on the low-friction layer. The conductive mesh fills the low-friction layer and is uniformly exposed on one end face of the low-friction layer. One end of the low-friction layer with the conductive mesh is a conductive surface, and the other opposite end face is a non-conductive surface. The through hole is formed by punching the body. The through hole is provided with multiple extension segments extending from the conductive mesh and multiple bent segments disposed at one end of the extension segments. The extension segments pass through the through hole and extend to the non-conductive surface. The bent segments are bent and connected to the extension segments and are close to the non-conductive surface. The length of the extension segments is greater than the depth of the through hole to form a conductive channel connecting the inner and outer sides of the body.
2. The convoluted bearing having inner and outer conductive structures of claim 1, wherein: The main body includes a bushing with a hollow cylindrical structure and a flange disposed at one end of the bushing, the bushing and the flange being integrally formed.
3. The convoluted bearing having inner and outer conductive structures of claim 1, wherein: The conductive mesh has multiple arrayed mesh openings, and the mesh openings are diamond-shaped.
4. The convoluted bearing having inner and outer conductive structures of claim 1, wherein: The extension section is formed by tensile deformation during the punching of the conductive mesh.
5. The convoluted bearing having inner and outer conductive structures of claim 1, wherein: The through-hole covers at least one wire mesh of the conductive mesh.
6. The convoluted bearing having inner and outer conductive structures of claim 1, wherein: The conductive mesh is woven in a warp and weft pattern or directly punched and stretched.
7. The convoluted bearing having inner and outer conductive structures of claim 1, wherein: The extension section is formed by the stretching and deformation of the wires during the punching of the conductive mesh.