Self-lubricating bearing based on PTFE film

Abstract

The utility model provides a self-lubricating bearing based on a PTFE (Polytetrafluoroethylene) film, and belongs to the technical field of bearings. A self-lubricating bearing based on a PTFE film comprises a ring body with a fracture, a PTFE layer is compounded on an inner ring of the ring body, at least one first groove is formed in the ring body, a graphite flake with colors is embedded in the first groove, and the PTFE layer covers the graphite flake. The lubricating device has the advantages of being good in shaft rotation lubricating effect and low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, in particular to a self-lubricating bearing based on a PTFE film. Background Art

[0002] Copper sleeve bearings are usually made of pure copper or with holes and embedded graphite columns. The former has a mediocre lubrication effect, while the latter has good lubrication performance but is complex to process and has a high cost. In addition, the copper sleeve itself is already expensive and the processing steps are cumbersome. Summary of the invention

[0003] The utility model aims to solve the above problems in the prior art and proposes a self-lubricating bearing based on PTFE film, which has the characteristics of good shaft rotation lubrication effect and low cost.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A self-lubricating bearing based on PTFE membrane comprises a ring body with a fracture, the inner ring of the ring body is compounded with a PTFE layer, at least one first groove is arranged inside the ring body, a colored graphite sheet is embedded in the first groove, and the PTFE layer covers the graphite sheet.

[0006] In the above-mentioned PTFE film-based self-lubricating bearing, the ring body is formed by bending a steel plate.

[0007] In the above-mentioned PTFE film-based self-lubricating bearing, the thickness of the ring body is 1-5 mm.

[0008] In the above-mentioned PTFE film-based self-lubricating bearing, the thickness of the PTFE layer is 0.2-1 mm.

[0009] In the above-mentioned self-lubricating bearing based on PTFE membrane, the side of the PTFE layer facing the ring body has a second groove corresponding to the first groove pair, and the graphite sheet is at least partially located outside the first groove, and this part of the graphite sheet is located in the second groove.

[0010] In the above-mentioned PTFE film-based self-lubricating bearing, the number of the first grooves is four, and the first grooves are distributed in a circumferential array on the ring body.

[0011] Compared with the prior art, this application has the following advantages:

[0012] In the present application, the PTFE layer of the inner ring provides excellent lubrication properties, which can effectively reduce friction and improve the operating efficiency and service life of the bearing. The PTFE material also has excellent chemical stability and corrosion resistance, and is suitable for various harsh environments. The colored graphite sheet not only enhances lubrication, but also helps to detect wear conditions intuitively and timely through its color changes. For example, when the PTFE layer is worn and the graphite sheet is exposed, the graphite sheet contacting the shaft will also wear, and black powder will appear at the junction of the shaft and the bearing, so that the wear condition and whether the bearing needs to be replaced can be judged. Even after the PTFE layer is worn, the graphite sheet can still maintain lubrication for a period of time and will not immediately affect normal use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a stereogram in this application;

[0014] Figure 2 yes Figure 1 A cross-sectional view at the AA position;

[0015] Figure 3 This is a partial cross-sectional view of the structure after the graphite sheet is taken out.

[0016] Figure 4 yes Figure 1 A cross-sectional view of the BB position.

[0017] In the figure,

[0018] 2. ring body; 21. fracture; 22. first groove;

[0019] 3. PTFE layer; 31. second groove;

[0020] 4. Graphite sheet. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 3 As shown, a self-lubricating bearing based on PTFE membrane includes a ring body 2 with a fracture 21, the inner ring of the ring body 2 is compounded with a PTFE layer 3, at least one first groove 22 is arranged inside the ring body 2, a colored graphite sheet 4 is embedded in the first groove 22, and the PTFE layer 3 covers the graphite sheet 4.

[0023] In the present application, the PTFE layer 3 of the inner ring provides excellent lubrication properties, which can effectively reduce friction and improve the operating efficiency and service life of the bearing. The PTFE material also has excellent chemical stability and corrosion resistance, and is suitable for various harsh environments. The colored graphite sheet 4 not only enhances lubrication, but also helps to detect wear conditions intuitively and timely through its color changes. For example, when the PTFE layer 3 is worn to expose the graphite sheet 4, the graphite sheet 4 in contact with the shaft will also wear, and black powder will appear at the junction of the shaft and the bearing, so that the wear condition and whether the bearing needs to be replaced can be judged. Even after the PTFE layer 3 is worn, the graphite sheet 4 can still maintain lubrication for a period of time and will not immediately affect normal use. The graphite sheet 4 can be an ordinary black graphite sheet 4.

[0024] Specifically, the ring body 2 is formed by bending a steel plate. This design can greatly reduce costs.

[0025] Specifically, the thickness of the ring body 2 is 1-5 mm.

[0026] Specifically, the thickness of the PTFE layer 3 is 0.2-1 mm.

[0027] Specifically, the side of the PTFE layer 3 facing the ring body 2 has a second groove 31 corresponding to the first groove 22 , and the graphite sheet 4 is at least partially located outside the first groove 22 , and this part of the graphite sheet 4 is located inside the second groove 31 .

[0028] When the PTFE layer 3 becomes thinner or damaged due to wear, the underlying graphite sheet 4 can immediately intervene and continue to provide lubrication, thereby extending the service life of the entire bearing system. Moreover, this layout of the graphite sheet 4 not only provides lubrication, but also, through its visible portion in the second groove 31, allows the graphite powder produced by wear to appear on the outside of the bearing, thereby prompting the need for inspection or replacement, thereby ensuring the timeliness of maintenance work.

[0029] Specifically, the number of the first grooves 22 is four, and the circumferential array is distributed on the ring body 2. The uniform distribution of the four grooves helps to evenly disperse the load around the entire ring body 2, reducing local overload and stress concentration. This design can improve the overall durability and performance stability of the bearing. Each groove can be embedded with a graphite sheet 4, ensuring that sufficient lubrication can be provided at different positions of the ring body 2, and that the graphite sheet 4 can be contacted after the PEFE layer is worn.

[0030] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship and movement status of the components in a certain specific posture, as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is that it includes three schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0033] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A self-lubricating bearing based on PTFE membrane, It is characterized in that The invention comprises a ring body (2) with a fracture (21), the inner ring of the ring body (2) being compounded with a PTFE layer (3), at least one first groove (22) being arranged inside the ring body (2), a colored graphite sheet (4) being embedded in the first groove (22), and the PTFE layer (3) covering the graphite sheet (4).

2. The self-lubricating bearing based on PTFE film according to claim 1, It is characterized in that The ring body (2) is formed by bending a steel plate.

3. The self-lubricating bearing based on PTFE film according to claim 1, It is characterized in that The thickness of the ring body (2) is 1-5 mm.

4. The self-lubricating bearing based on PTFE film according to claim 1, It is characterized in that The thickness of the PTFE layer (3) is 0.2-1 mm.

5. The self-lubricating bearing based on PTFE film according to claim 1, It is characterized in that The PTFE layer (3) has a second groove (31) corresponding to the first groove (22) on one side facing the ring body (2); the graphite sheet (4) is at least partially located outside the first groove (22), and the portion of the graphite sheet (4) is located inside the second groove (31).

6. The PTFE film-based self-lubricating bearing according to claim 1, It is characterized in that The number of the first grooves (22) is four, and they are distributed in a circumferential array on the ring body (2).

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