A wear-resistant and quiet two-section hinge

Abstract

This utility model relates to a wear-resistant and quiet two-section hinge, comprising a first blade, a second blade, and a main shaft. The main shaft includes a male shaft and a female shaft. The male shaft is fixedly connected to the first blade, and the female shaft is fixedly connected to the second blade. One end of the female shaft has a blind hole, and one end of the male shaft has a convex shaft fixedly installed. The convex shaft rotatably engages with the blind hole. A wear-resistant sleeve made of polyetheretherketone (PEEK) is fixedly installed on the bottom inner wall of the blind hole. The top of the convex shaft fits against the wear-resistant sleeve. A polytetrafluoroethylene (PTFE) coating is fixedly installed at the opening end of the blind hole. A gap exists between the opposing surfaces of the male and female shafts. This design, through multiple improvements such as the inclusion of a PEEK wear-resistant sleeve, a PTFE coating, and a reasonable gap, solves the problems of high noise, easy wear, and poor applicability of traditional hinges, meeting the needs of hospitals, laboratories, data centers, and other application scenarios with high requirements for noise and cleanliness.

Description

Technical Field

[0001] This utility model relates to the field of hinge technology, and in particular to a wear-resistant and quiet two-section hinge. Background Technology

[0002] Hinges, as basic hardware accessories connecting two components and enabling relative rotation, are widely used in furniture, building doors and windows, medical devices, precision equipment, and other fields. With the development of modern industrial technology and the increasing demands on working and living environments, traditional hinges have gradually revealed many shortcomings in certain special applications. Existing ordinary metal hinges, during frequent opening and closing, easily generate noise due to the lack of effective friction reduction and noise reduction design on the friction surface, affecting user comfort, especially in places with strict requirements for quiet environments such as hospitals, laboratories, and data centers. Furthermore, during long-term use, traditional hinges may produce metal shavings or powder due to material wear. In environments with high cleanliness requirements (such as cleanrooms, food processing, and semiconductor manufacturing), these shavings not only affect environmental hygiene but may also contaminate or even damage precision instruments or products.

[0003] Meanwhile, although some improved silent hinges use rubber or plastic gaskets to reduce noise, these materials often have poor wear resistance and short service life, causing the hinge performance to decline rapidly over time, making it difficult to meet the long-term stable operation requirements of high-frequency opening applications. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a wear-resistant and quiet two-section hinge. Through multiple improvements such as setting a PEEK wear-resistant sleeve, polytetrafluoroethylene coating and reasonable gap, the problems of high noise, easy wear and poor applicability of traditional hinges are solved, and the needs of hospitals, laboratories, data centers and other use scenarios with high requirements for noise and cleanliness are met.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A wear-resistant and quiet two-section hinge includes a first blade, a second blade, and a main shaft. The main shaft includes a male shaft and a female shaft. The male shaft is fixedly connected to the first blade, and the female shaft is fixedly connected to the second blade. One end of the female shaft is provided with a blind hole, and one end of the male shaft is fixedly provided with a convex shaft. The convex shaft is rotatably engaged with the blind hole. A wear-resistant sleeve is fixedly installed on the bottom inner wall of the blind hole. The wear-resistant sleeve is made of polyetheretherketone (PEEK). The top of the convex shaft is fitted with the wear-resistant sleeve. The open end of the blind hole is fixedly provided with a polytetrafluoroethylene coating. There is a gap between the opposing surfaces of the male shaft and the female shaft.

[0007] Compared to ordinary hinge structures on the market, the solution proposed in this application adopts a structure in which the male and female shafts do not directly contact each other. Firstly, this solution features a wear-resistant sleeve made of polyetheretherketone (PEEK) at the bottom of the blind hole on the female shaft, which contacts the top of the convex shaft on the male shaft. Due to PEEK's excellent wear resistance, chemical corrosion resistance, and high-temperature resistance, it can withstand the wear of long-term high-frequency opening and closing, significantly extending the hinge's service life and effectively reducing wear debris generated over long-term use, further reducing noise caused by wear and friction. Secondly, this hinge incorporates a polytetrafluoroethylene coating at the opening end of the blind hole. This coating has excellent self-lubricating properties, greatly reducing the coefficient of friction during hinge opening and closing, reducing vibration, noise, and debris generated by side friction, while also providing waterproofing. Finally, the gap between the male and female shafts avoids direct rigid contact between metal parts, further suppressing noise generation and preventing wear debris formation. Furthermore, the gap allows the hinge to adapt to thermal expansion and contraction changes under different environments to a certain extent, ensuring stable operation under various conditions. In summary, the hinge structure of this application solves the shortcomings of traditional hinges in terms of wear resistance, noise reduction, and cleanliness, and is especially suitable for places with high requirements for noise control and environmental cleanliness, such as hospitals, laboratories, and data centers.

[0008] Preferably, the wear-resistant sleeve has a first tapered inclined surface on the side facing the convex shaft, and the convex shaft has a second tapered inclined surface on the side facing the wear-resistant sleeve, with the first and second tapered inclined surfaces fitting together. This arrangement allows the tapered inclined surface to provide a larger actual contact area compared to a flat surface, thereby dispersing the pressure per unit area, reducing localized wear intensity, and improving overall wear resistance. Simultaneously, the tapered inclined surface has good guiding and self-aligning capabilities, making the rotation between the male and female shafts smoother and more stable, further suppressing vibration and noise generation.

[0009] Preferably, the apex angle of the second conical inclined surface is 90°. This results in more even force distribution on the contact surface during hinge rotation; and at this angle, the convex shaft is more likely to automatically align with the center when entering the blind hole, reducing uneven wear. It should be noted that the apex angle refers to the included angle between the two sides of the conical inclined surface.

[0010] Preferably, the wear-resistant sleeve has a through hole at its center, which is coaxial with the cam shaft. This through hole design provides a clear installation guide path for the cam shaft on the male shaft, allowing for quick and precise insertion of the cam shaft into the blind hole during hinge assembly, significantly reducing assembly difficulty and errors, and substantially improving production efficiency. Furthermore, the coaxial arrangement of the through hole and cam shaft ensures that the male and female shafts maintain precise concentricity during rotation, resulting in smoother hinge operation and effectively reducing vibration and noise.

[0011] Preferably, a copper sleeve is fixedly installed at the open end of the blind hole, and the polytetrafluoroethylene (PTFE) coating is sintered onto the surface of the copper sleeve. Since the spindle is generally made of stainless steel, it is not conducive to the adhesion of the PTFE coating, reducing the coating's wear resistance. Therefore, using a copper sleeve as a carrier for the PTFE coating is more beneficial for the firm sintering of the coating compared to directly coating the inner wall of the blind hole. The good ductility and surface activity of copper can form a tight bond with the PTFE coating, effectively preventing peeling and delamination during frequent hinge opening and closing, ensuring the coating maintains its self-lubricating and noise-reducing functions for a long time, and extending the hinge's noise reduction life.

[0012] Preferably, the width of the gap is greater than the distance between the top of the male shaft and the bottom of the blind hole. This ensures that even if the plastic inside the female shaft melts or wears excessively, a gap still exists between the male and female shafts, guaranteeing that the hinge's rotational performance is not significantly affected.

[0013] Preferably, the male and female shafts are an integrated structure. This integrated structure improves structural strength. It is worth noting that, because there are no assembly gaps or relative displacements that can occur in a split structure, the integrated male and female shafts mesh more precisely during rotation, reducing wear and noise caused by friction and collision between components. This further enhances the hinge's wear resistance and quiet operation, meeting the needs of hospitals, laboratories, and other environments with high requirements for quiet operation.

[0014] Preferably, both the male and female shafts are made of stainless steel. This ensures structural strength and hardness while significantly improving the hinge's suitability for high-cleanliness environments by utilizing the smooth surface of stainless steel, its resistance to impurity absorption, and its resistance to oxidation and corrosion.

[0015] Preferably, both the first and second blades are provided with mounting holes. This provides a clear positioning reference for the hinge installation, making installation simpler and faster, and ensuring precise alignment of the hinge during installation.

[0016] In summary, this wear-resistant and quiet two-section hinge, through multiple improvements such as the inclusion of a PEEK wear-resistant sleeve, a PTFE coating, and a reasonable gap, solves the problems of high noise, easy wear, and poor applicability of traditional hinges, and meets the needs of hospitals, laboratories, data centers, and other application scenarios with high requirements for noise and cleanliness. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0018] Figure 1 This is a schematic diagram of the structure of the wear-resistant and noise-reducing two-section hinge described in this utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the wear-resistant and noise-reducing two-section hinge described in this utility model. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the wear-resistant sleeve in the wear-resistant and noise-reducing two-section hinge of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the female shaft in the wear-resistant and quiet two-section hinge described in this utility model;

[0022] Figure 5 This is a schematic diagram of the male shaft in the wear-resistant and quiet two-section hinge described in this utility model.

[0023] in:

[0024] 1-First blade;

[0025] 2-Second blade;

[0026] 3-Main spindle; 31-Male spindle; 32-Female spindle; 33-Blind hole; 34-Male shaft; 341-Second tapered inclined surface;

[0027] 4-Wear-resistant sleeve; 41-First tapered bevel; 42-Through hole;

[0028] 5-Polytetrafluoroethylene coating; 51-Copper sleeve;

[0029] 6-Gap;

[0030] 7-Mounting holes. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] In the description of this utility model, it should be understood that the orientation and positional relationship indicated by terms such as "up", "down", "left", "right", "front", "back", "vertical", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Reference Figure 1 , Figure 2 and Figure 4As shown, a wear-resistant and quiet two-section hinge includes a first blade 1, a second blade 2, and a main shaft 3. The main shaft 3 includes a male shaft 31 and a female shaft 32. The male shaft 31 is fixedly connected to the first blade 1, and the female shaft 32 is fixedly connected to the second blade 2. A blind hole 33 is provided at one end of the female shaft 32, and a convex shaft 34 is fixedly provided at one end of the male shaft 31. The convex shaft 34 is rotatably engaged with the blind hole 33. A wear-resistant sleeve 4 is fixedly installed on the bottom inner wall of the blind hole 33. The material of the wear-resistant sleeve 4 is polyetheretherketone (PEEK). The top of the convex shaft 34 is in contact with the wear-resistant sleeve 4. A polytetrafluoroethylene coating 5 is fixedly provided at the open end of the blind hole 33. There is a gap 6 between the opposite surfaces of the male shaft 31 and the female shaft 32.

[0034] Compared to ordinary hinge structures on the market, the solution in this application adopts a structure in which the male shaft 31 and the female shaft 32 do not directly contact each other. First, this solution sets a wear-resistant sleeve 4 made of polyetheretherketone (PEEK) at the bottom of the blind hole 33 of the female shaft 32, which is used to contact the top of the convex shaft 34 on the male shaft 31. Due to the excellent wear resistance, chemical corrosion resistance and high temperature resistance of PEEK, it can withstand the wear of long-term high-frequency opening and closing, significantly extending the service life of the hinge, and effectively reducing wear debris generated by long-term use, and further reducing noise caused by wear and friction. Second, this hinge sets a polytetrafluoroethylene coating 5 at the opening end of the blind hole 33. This coating has excellent self-lubricating properties, which greatly reduces the coefficient of friction when the hinge is opened and closed, reduces vibration, noise and debris generated by side friction, and also plays a waterproof role. Finally, a gap 6 exists between the male shaft 31 and the female shaft 32, avoiding direct rigid contact between metal parts, further suppressing noise generation and preventing wear debris. Furthermore, the gap 6 allows the hinge to adapt to thermal expansion and contraction changes under different environments, ensuring stable operation under various conditions. In summary, the hinge structure of this application solves the shortcomings of traditional hinges in terms of wear resistance, quietness, and cleanliness, and is particularly suitable for places with high requirements for noise control and environmental cleanliness, such as hospitals, laboratories, and data centers.

[0035] Additionally, refer to Figure 3 and Figure 5 As shown, the wear-resistant sleeve 4 has a first tapered inclined surface 41 on the side facing the convex shaft 34, and the convex shaft 34 has a second tapered inclined surface 341 on the side facing the wear-resistant sleeve 4. The first tapered inclined surface 41 and the second tapered inclined surface 341 fit together. This arrangement allows the tapered inclined surface to provide a larger actual contact area compared to a flat surface, thereby dispersing the pressure per unit area, reducing local wear intensity, and improving overall wear resistance. Simultaneously, the tapered inclined surface has good guiding and self-aligning capabilities, making the rotation between the male shaft 31 and the female shaft 32 smoother and more stable, further suppressing vibration and noise generation.

[0036] Furthermore, the apex angle of the second conical inclined surface 341 is 90°. This results in more even force distribution on the contact surface during hinge rotation; and at this angle, the convex shaft 34 is more likely to automatically align with the center when entering the blind hole 33, reducing uneven wear. It should be noted that the apex angle refers to the included angle between the two sides of the conical inclined surface.

[0037] Additionally, refer to Figure 3 As shown, the wear-resistant sleeve 4 has a through hole 42 at its center, which is coaxial with the convex shaft 34. The through hole 42 in the center of the wear-resistant sleeve 4 provides a clear installation guide path for the convex shaft 34 on the male shaft 31. During hinge assembly, the convex shaft 34 can be quickly and accurately inserted into the blind hole 33, significantly reducing assembly difficulty and errors, and significantly improving production efficiency. Furthermore, the coaxial arrangement of the through hole 42 and the convex shaft 34 ensures that the male shaft 31 and the female shaft 32 maintain precise concentricity during rotation, making the hinge operate more smoothly during opening and closing, and effectively reducing vibration and noise.

[0038] Additionally, refer to Figure 2 As shown, a copper sleeve 51 is fixedly installed at the open end of the blind hole 33, and the polytetrafluoroethylene (PTFE) coating 5 is sintered onto the surface of the copper sleeve 51. Since the spindle 3 is generally made of stainless steel, it is not conducive to the adhesion of the PTFE coating 5, reducing the coating's wear resistance. Therefore, using the copper sleeve 51 as the carrier for the PTFE coating 5 is more beneficial for the firm sintering of the coating compared to directly coating the inner wall of the blind hole 33. The good ductility and surface activity of copper can form a tight bond with the PTFE coating 5, effectively preventing problems such as peeling and delamination of the coating during frequent opening and closing of the hinge, ensuring that the coating performs its self-lubricating and noise-reducing functions for a long time, and extending the noise reduction life of the hinge.

[0039] Furthermore, the width of gap 6 is greater than the distance between the top of the male shaft 34 and the bottom of the blind hole 33. In this way, if the plastic inside the female shaft 32 melts or wears excessively, gap 6 will still exist between the male shaft 31 and the female shaft 32, ensuring that the rotation performance of the hinge is not significantly affected.

[0040] Furthermore, the male shaft 34 and the female shaft 31 are integrated. This integrated structure improves structural strength. It is worth noting that, because there are no assembly gaps 6 and relative displacements that may occur in a split structure, the integrated male shaft 34 and female shaft 31 cooperate more precisely during rotation, reducing wear and noise caused by friction and collision between components. This further enhances the hinge's wear resistance and quietness, meeting the needs of hospitals, laboratories, and other places with high requirements for environmental quietness.

[0041] Furthermore, both the male shaft 31 and the female shaft 32 are made of stainless steel. In this way, while ensuring structural strength and hardness, the smooth surface of stainless steel, its resistance to impurity adsorption, and its non-oxidation and corrosion properties significantly improve the suitability of the hinge in high-cleanliness environments.

[0042] Additionally, refer to Figure 1 As shown, both the first blade 1 and the second blade 2 are provided with mounting holes 7. In this way, the mounting holes 7 provide a clear positioning reference for the installation of the hinge, making the installation simpler and faster, and ensuring the precise alignment of the hinge during installation.

[0043] In summary, this wear-resistant and quiet two-section hinge, through multiple improvements such as the inclusion of a PEEK wear-resistant sleeve 4, a polytetrafluoroethylene coating 5, and a reasonable gap 6, solves the problems of high noise, easy wear, and poor applicability of traditional hinges, and meets the needs of hospitals, laboratories, data centers, and other application scenarios with high requirements for noise and cleanliness.

[0044] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wear-resistant and quiet two-section hinge, comprising a first blade, a second blade, and a main shaft, characterized in that, The main shaft includes a male shaft and a female shaft. The male shaft is fixedly connected to a first blade, and the female shaft is fixedly connected to a second blade. One end of the female shaft is provided with a blind hole, and one end of the male shaft is fixedly provided with a convex shaft. The convex shaft is rotatably engaged with the blind hole. A wear-resistant sleeve is fixedly installed on the bottom inner wall of the blind hole. The wear-resistant sleeve is made of polyetheretherketone (PEEK). The top of the convex shaft is fitted with the wear-resistant sleeve. The open end of the blind hole is fixedly provided with a polytetrafluoroethylene (PTFE) coating. There is a gap between the opposing surfaces of the male shaft and the female shaft.

2. The wear-resistant and noise-reducing two-section hinge according to claim 1, characterized in that, The wear-resistant sleeve has a first tapered inclined surface on the side facing the convex shaft, and the convex shaft has a second tapered inclined surface on the side facing the wear-resistant sleeve. The first tapered inclined surface and the second tapered inclined surface fit together.

3. The wear-resistant and noise-reducing two-section hinge according to claim 2, characterized in that, The apex angle of the second conical inclined plane is 90°.

4. The wear-resistant and noise-reducing two-section hinge according to claim 3, characterized in that, The wear-resistant sleeve has a through hole at its center, and the through hole is coaxial with the convex shaft.

5. The wear-resistant and noise-reducing two-section hinge according to claim 1, characterized in that, A copper sleeve is fixedly installed at the open end of the blind hole, and the polytetrafluoroethylene coating is sintered onto the surface of the copper sleeve.

6. The wear-resistant and noise-reducing two-section hinge according to claim 1, characterized in that, The width of the gap is greater than the distance between the top of the convex shaft and the bottom of the blind hole.

7. The wear-resistant and noise-reducing two-section hinge according to claim 1, characterized in that, The male and female shafts are an integrated structure.

8. The wear-resistant and noise-reducing two-section hinge according to claim 6, characterized in that, Both the male and female shafts are made of stainless steel.

9. The wear-resistant and noise-reducing two-section hinge according to claim 1, characterized in that, Both the first blade and the second blade are provided with mounting holes.

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