Oil-free self-lubricating hinge structure

Abstract

The utility model discloses an oil-free self-lubricating hinge structure, which relates to the technical field of hardware fittings and comprises a square-corner outer hinge, a square-corner inner hinge, a shaft core and a plurality of oil-free self-lubricating bearing inner sleeves. The top and the bottom of the side end of the square-corner outer hinge are fixedly connected with shaft heads, the middle position of the side end of the square-corner inner hinge is fixedly connected with a shaft sleeve, the shaft heads and the shaft sleeve are provided with rotating shaft holes, an oil-free self-lubricating bearing inner sleeve is inserted into the rotating shaft holes, a shaft core is inserted into an inner hole of the oil-free self-lubricating bearing inner sleeve, and the square-corner outer hinge is rotationally connected with the square-corner inner hinge through the shaft core; through the oil-free self-lubricating bearing inner sleeves with the four inner walls made of polytetrafluoroethylene, consumption of lubricating oil is reduced, the trouble of regular maintenance is omitted, and therefore the maintenance cost is remarkably reduced; and the polytetrafluoroethylene material can be self-lubricated when being rubbed, so that the abrasion caused by friction is reduced, and the service life of the hinge is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware accessories, in particular to an oil-free self-lubricating hinge structure. Background Art

[0002] In the hardware accessories industry, hinges are key components connecting movable parts like doors and windows. Their performance directly impacts the overall product experience and durability. Traditional hinges often rely on lubricants to reduce friction and wear during rotation, but this design has several significant limitations. First, while lubricants provide good lubrication in the short term, their volatility and easy loss mean that hinges require frequent lubrication and maintenance. This not only increases maintenance costs and time for users, but can also lead to problems such as sticking and noise due to insufficient lubrication, impacting the user experience. Second, lubricant leakage is a common problem. Over long-term use, due to degraded sealing performance or environmental factors, lubricant can easily seep out of the hinge, contaminating the surrounding environment and even damaging furniture and flooring. This not only affects the aesthetics and cleanliness of the home environment but can also pose a safety hazard. Furthermore, with growing environmental awareness and the promotion of energy-saving and emission-reduction policies, traditional hinge designs that rely on lubricants are increasingly unable to meet market demand.

[0003] Based on this, an oil-free self-lubricating hinge structure is now provided to eliminate the disadvantages of the existing device. Utility Model Content

[0004] The purpose of the utility model is to provide an oil-free self-lubricating hinge structure to solve the problem in the background technology that lubricating oil is volatile, easily polluted and needs to be frequently replenished, which not only increases maintenance costs but also may affect the use environment and appearance due to oil leakage.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The oil-free self-lubricating hinge structure includes a square-angle outer hinge, a square-angle inner hinge, a shaft core and a plurality of oil-free self-lubricating bearing inner sleeves;

[0007] The top and bottom of the side end of the square corner outer hinge are fixedly connected to the shaft head, and the middle position of the side end of the square corner inner hinge is fixedly connected to the shaft sleeve. The shaft head and the shaft sleeve are provided with a rotating shaft hole, and the oil-free self-lubricating bearing inner sleeve is inserted into the rotating shaft hole. The shaft core is inserted into the inner hole of the oil-free self-lubricating bearing inner sleeve, and the square corner outer hinge and the square corner inner hinge are rotatably connected through the shaft core.

[0008] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In an optional solution, the number of the oil-free self-lubricating bearing inner sleeves is four, and the four oil-free self-lubricating bearing inner sleeves are symmetrically arranged inside the rotating shaft hole opened by the shaft head and the shaft sleeve.

[0010] In an optional solution: the ends of the rotating shaft holes formed in the shaft head are all installed with thread rolling flat heads.

[0011] In an optional solution: the two thread rolling flat heads are symmetrically arranged at both ends of the shaft core.

[0012] In an optional solution: a gasket is installed at the connection between the thread rolling flat head and the shaft head.

[0013] In an optional solution, the gasket is made of 304 stainless steel.

[0014] In an optional solution, a fixing hole is formed at one end of the square corner outer hinge and the square corner inner hinge.

[0015] In an optional solution: the inner wall of the oil-free self-lubricating bearing inner sleeve is made of polytetrafluoroethylene, the middle material of the oil-free self-lubricating bearing inner sleeve is steel, and the outer wall of the oil-free self-lubricating bearing inner sleeve is copper-plated.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This new hinge features four oil-free, self-lubricating bearing sleeves with inner walls made of polytetrafluoroethylene (PTFE). This not only reduces lubricant consumption but also eliminates the need for regular maintenance, significantly lowering maintenance costs. The polytetrafluoroethylene material self-lubricates when subjected to friction, reducing wear and tear and extending the life of the hinge. The oil-free, self-lubricating technology significantly reduces the noise generated by the hinge during rotation, significantly enhancing the comfort of the home environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] Figure 2 This is a structural diagram of the front view of the present invention.

[0020] Notes on the accompanying figures: 11. Threaded flat head; 12. Shaft core; 13. Gasket; 14. Oil-free self-lubricating bearing inner sleeve; 15. Square-corner outer hinge; 16. Square-corner inner hinge; 17. Shaft head; 18. Shaft sleeve; 19. Fixing hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0022] In one embodiment, Figure 1-Figure 2 As shown, the oil-free self-lubricating hinge structure includes a square corner outer hinge 15, a square corner inner hinge 16, a shaft core 12 and a plurality of oil-free self-lubricating bearing inner sleeves 14;

[0023] The top and bottom of the side end of the square corner outer hinge 15 are fixedly connected to the shaft head 17, and the middle position of the side end of the square corner inner hinge 16 is fixedly connected to the shaft sleeve 18. The shaft head 17 and the shaft sleeve 18 are provided with a rotating shaft hole, and the oil-free self-lubricating bearing inner sleeve 14 is inserted into the rotating shaft hole. The shaft core 12 is inserted into the inner hole of the oil-free self-lubricating bearing inner sleeve 14, and the square corner outer hinge 15 and the square corner inner hinge 16 are rotatably connected through the shaft core 12.

[0024] In this embodiment, when installing the hinge, it is important to ensure the precise fit between the shaft head 17, shaft sleeve 18, and the oil-free, self-lubricating bearing inner sleeve 14. Precise machining and assembly ensure smooth and stable hinge rotation. Due to the use of oil-free, self-lubricating technology, the hinge does not require regular lubrication during use, thus preventing performance degradation due to lubricant loss or contamination.

[0025] In one embodiment, Figure 1 and Figure 2 As shown, there are four oil-free self-lubricating bearing inner sleeves 14 , and the four oil-free self-lubricating bearing inner sleeves 14 are symmetrically arranged inside the rotating shaft hole opened by the shaft head 17 and the shaft sleeve 18 .

[0026] The symmetrical distribution of the four oil-free, self-lubricating bearing sleeves 14 ensures that the shaft core 12 is evenly stressed during rotation, reducing wear and noise caused by uneven stress. The use of multiple oil-free, self-lubricating bearing sleeves 14 improves the overall stability of the hinge, enabling it to withstand greater loads and more frequent rotations.

[0027] In one embodiment, Figure 1 and Figure 2 As shown, the ends of the shaft holes formed in the shaft heads 17 are all provided with thread rolling flat heads 11 .

[0028] The thread rolling flat head 11 can restrict the shaft core 12 inside the shaft hole to prevent it from loosening or falling off during the rotation process.

[0029] In one embodiment, Figure 1 and Figure 2 As shown, the two thread rolling flat heads 11 are symmetrically arranged at both ends of the shaft core 12.

[0030] The symmetrically arranged rolling heads 11 can balance the torque generated by the shaft core 12 during rotation, further improving the stability and durability of the hinge. It ensures that the shaft core 12 maintains linear motion during rotation and prevents additional wear and noise caused by deviation.

[0031] In one embodiment, Figure 1 As shown, a gasket 13 is installed at the connection between the thread rolling flat head 11 and the shaft head 17.

[0032] The gasket 13 can fill the small gap between the thread rolling flat head 11 and the shaft head 17, thereby improving the sealing of the connection and preventing impurities such as dust and moisture from entering the interior of the hinge.

[0033] In one embodiment, Figure 1 and Figure 2 As shown, the gasket 13 is made of 304 stainless steel.

[0034] The 304 stainless steel material has good corrosion resistance and can protect the gasket 13 from being damaged by environmental factors.

[0035] In one embodiment, Figure 1 and Figure 2 As shown, a fixing hole 19 is formed at one end of the square corner outer hinge 15 and the square corner inner hinge 16 .

[0036] The fixing hole 19 is used to connect with the door body, or with the window, etc., so that the door body or the window, etc. can be rotatably connected through the oil-free self-lubricating hinge structure provided by the present application.

[0037] In one embodiment, Figure 1 and Figure 2 As shown, the inner wall material of the oil-free self-lubricating bearing inner sleeve 14 is polytetrafluoroethylene, the middle material of the oil-free self-lubricating bearing inner sleeve 14 is steel, and the outer wall material of the oil-free self-lubricating bearing inner sleeve 14 is copper-plated.

[0038] The polytetrafluoroethylene layer offers excellent self-lubricating properties, reducing friction and wear without the need for external lubrication. The intermediate steel layer provides sufficient strength and load-bearing capacity, ensuring the hinge does not deform or break under load. The copper-plated outer wall offers corrosion and wear resistance, extending the service life of the oil-free, self-lubricating bearing inner sleeve 14.

[0039] The above-described embodiment discloses an oil-free, self-lubricating hinge structure. When the outer square-corner hinge 15 and the inner square-corner hinge 16 rotate relative to each other via the shaft core 12, the self-lubricating material within the oil-free, self-lubricating bearing inner sleeve 14 begins to function. The presence of polytetrafluoroethylene significantly reduces friction between the oil-free, self-lubricating bearing inner sleeve 14 and the shaft core 12, thereby reducing wear and noise. This self-lubricating mechanism also extends the hinge's service life. The combined action of multiple oil-free, self-lubricating bearing inner sleeves 14 enables the hinge to rotate stably and smoothly, maintaining excellent performance even under prolonged use or heavy loads.

[0040] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An oil-free self-lubricating hinge structure, comprising a square-corner outer hinge (15), a square-corner inner hinge (16), a shaft core (12) and a plurality of oil-free self-lubricating bearing inner sleeves (14); It is characterized in that The top and bottom of the side end of the square corner outer hinge (15) are fixedly connected to the shaft head (17), and the middle position of the side end of the square corner inner hinge (16) is fixedly connected to the shaft sleeve (18). The shaft head (17) and the shaft sleeve (18) are provided with a rotating shaft hole, and the oil-free self-lubricating bearing inner sleeve (14) is inserted into the rotating shaft hole. The shaft core (12) is inserted into the inner hole of the oil-free self-lubricating bearing inner sleeve (14), and the square corner outer hinge (15) and the square corner inner hinge (16) are rotatably connected through the shaft core (12).

2. The oil-free self-lubricating hinge structure according to claim 1, characterized in that: The number of the oil-free self-lubricating bearing inner sleeves (14) is four, and the four oil-free self-lubricating bearing inner sleeves (14) are symmetrically arranged inside the rotating shaft hole opened by the shaft head (17) and the shaft sleeve (18).

3. The oil-free self-lubricating hinge structure according to claim 1, characterized in that: The ends of the rotating shaft holes formed by the shaft head (17) are all equipped with thread rolling flat heads (11).

4. The oil-free self-lubricating hinge structure according to claim 3, characterized in that: The two thread rolling flat heads (11) are symmetrically arranged at both ends of the shaft core (12).

5. The oil-free self-lubricating hinge structure according to claim 3, characterized in that: A gasket (13) is installed at the connection between the thread rolling flat head (11) and the shaft head (17).

6. The oil-free self-lubricating hinge structure according to claim 5, characterized in that: The gasket (13) is made of 304 stainless steel.

7. The oil-free self-lubricating hinge structure according to claim 1, characterized in that: One end of the square corner outer hinge (15) and the square corner inner hinge (16) is provided with a fixing hole (19).

8. The oil-free self-lubricating hinge structure according to claim 1, characterized in that: The inner wall material of the oil-free self-lubricating bearing inner sleeve (14) is polytetrafluoroethylene, the middle material of the oil-free self-lubricating bearing inner sleeve (14) is steel, and the outer wall material of the oil-free self-lubricating bearing inner sleeve (14) is copper plating.

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