Silent hinge
By installing bearings and load-bearing rings in the hinges, and utilizing spline connections and lubrication mechanisms, the problem of wear noise between the shaft sleeves is solved, achieving a quiet hinge with reduced noise and extended service life.
Patent Information
- Application Number
- CN202520144212.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-01-21
AI Technical Summary
During use, existing hinges generate noise due to wear between the shaft sleeve and the shaft core. Existing bearings can only reduce the noise between the shaft core and the tube hole, but cannot effectively reduce the wear noise between the shaft sleeves.
Bearings are installed at both ends of the second shaft, and a bearing ring is fixed on the outer ring of the bearing. The balls are in close contact with the cage, and the shaft core is connected by a spline to reduce the contact between the shafts. Combined with the lubrication pipe and oiling channel, lubrication can be achieved for long-term use.
It effectively reduces noise during hinge use, increases the quietness of the hinge, and extends the service life of the hinge through the lubrication mechanism.
Smart Images
Figure CN223964328U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hinge technology, specifically a silent hinge. Background Technology
[0002] Hinges are typically bi-fold hinges, connecting two parts of an object and allowing them to move. They are commonly used in the hinges of cabinet doors, windows, and other doors. In ordinary hinges, the shaft is directly inserted into a cylinder hole on one side of the hinge. When the hinge rotates, significant friction and noise are generated between the shaft and the cylinder hole, affecting the hinge's performance. To reduce noise caused by wear between the cylinder hole and the shaft, several bearings are usually installed inside the cylinder hole. However, during installation and use, the cylinders between the two flaps are affected by the weight of the door or window, causing wear to occur at one end of the cylinders. Over time, this wear also generates noise. While bearings inside the cylinders can reduce noise from wear between the shaft and the cylinder hole, they cannot reduce noise from wear between the cylinders themselves, resulting in a tendency for the hinge to move during use.
[0003] Based on this, a silent hinge is now provided that eliminates the drawbacks of existing devices. Utility Model Content
[0004] The purpose of this invention is to provide a silent hinge to solve the problem in the prior art that it is inconvenient to make the hinge silent during use.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A silent hinge includes a first leaf and a second leaf. A first shaft cylinder is symmetrically arranged on one side of the first leaf, and a second shaft cylinder is fixedly arranged in the middle of one side of the second leaf. The first and second shaft cylinders are coaxially arranged, and each of the first and second shaft cylinders has a shaft hole in the middle. A shaft core is fitted at the coaxial position of the first and second shaft cylinders. One end of the shaft core has a threaded hole, and a threaded rod is fitted in the threaded hole. The threaded rod is fixedly arranged at one end of a first decorative cap, and a second decorative cap is tightly attached to the other end of the shaft core. A threaded tube is fixedly arranged at one end of the first and second decorative caps, and the threaded tube is fitted in the threaded hole at one end of the first shaft cylinder. Both ends of the second shaft cylinder have mounting grooves, and each mounting groove has a silent mechanism for preventing noise from being generated between the two ends of the first and second shaft cylinders.
[0007] Based on the above technical solutions, this utility model also provides the following optional technical solutions:
[0008] In one alternative embodiment: the noise reduction mechanism includes bearings, with bearings fitted into mounting slots at both ends of the second shaft cylinder. A bearing ring is fixedly mounted on one side of the outer ring of each bearing, with several balls tightly fitted to one side of each bearing ring. The balls on the same side are fitted into a retainer. Several first fixing rods are fixedly mounted at equal intervals on one side of the retainer. The other end of each first fixing rod is fixedly mounted on one side of a fixing plate. The fixing plate is located in a positioning slot at one end of the first shaft cylinder. An inner spline ring is fixedly mounted inside the inner ring of each bearing, and an outer spline shaft is fitted inside each inner spline ring. The outer spline shaft is fixedly mounted on a shaft core.
[0009] In one alternative: a stop ring is fixedly provided on the outer ring of each bearing, and a plurality of limiting grooves are provided on the stop rings. Limiting blocks are slidably fitted in each limiting groove, and the limiting blocks are fixedly provided inside the mounting groove.
[0010] In one alternative: a plurality of stop holes are provided on one side of the fixing plate, and a limiting post is slidably provided inside each of the stop holes, and a rubber layer is provided on the outside of each limiting post.
[0011] In one alternative: the first decorative cap is provided with an oiling channel, one end of which is provided with a threaded hole, and a sealing screw is fitted inside the threaded hole; a first lubrication tube is slidably provided inside the first shaft cylinder, and a limiting ring is tightly attached to one end of each of the first lubrication tubes; the limiting ring is fixedly provided at one end of the shaft hole inside the first shaft cylinder; and a second lubrication tube is fitted inside the shaft hole in the middle of the second shaft cylinder.
[0012] In one alternative: both the first lubrication tube and the second lubrication tube have a tapered end.
[0013] In one alternative: a limiting block is fixedly provided at one end of the shaft core, and a limiting hole is provided in the middle of the threaded tube at one end of the second decorative cap to cooperate with the limiting block.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] This invention features bearings installed in mounting grooves at both ends of the second shaft cylinder, with a bearing ring fixedly mounted on the outer ring of each bearing. A retainer is installed in a positioning groove at one end of the first shaft cylinder, with several balls mounted on the retainer in close contact with one side of the bearing ring. During use, the second leaf blade rotates the outer ring of the bearing via the second shaft cylinder, while the balls roll on one side of the bearing ring, preventing contact between the first and second shaft cylinders. The small contact area between the balls and the bearing ring reduces noise during use. Furthermore, an oiling channel is provided on the first decorative cap, and a first lubrication pipe and a second lubrication pipe are respectively installed inside the first and second shaft cylinders, facilitating lubrication after prolonged use and enhancing the practicality of the silent hinge. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model.
[0017] Figure 2 This is a schematic diagram of the shaft core installation of this utility model.
[0018] Figure 3 This is a schematic diagram of the second lubrication pipe structure of this utility model.
[0019] Figure 4 This is a schematic diagram of the cage structure of this utility model.
[0020] Figure 5 This is a schematic diagram of the second shaft cylinder structure of this utility model.
[0021] Figure 6 This is a schematic diagram of the structure of the first decorative cap of this utility model.
[0022] Figure 7 This is a schematic diagram of the structure of the second decorative cap of this utility model.
[0023] Figure reference numerals: 11 First leaf, 12 First shaft sleeve, 13 Second leaf, 14 Second shaft sleeve, 15 Shaft core, 16 First decorative cap, 17 Second decorative cap, 18 Threaded rod, 19 Limiting block, 20 Bearing, 21 Inner spline ring, 22 Bearing ring frame, 23 Fixing plate, 24 Retainer, 25 Ball bearing, 26 First lubrication tube, 27 Limiting ring, 28 Second lubrication tube, 29 Sealing screw, 30 Stop ring. Detailed Implementation
[0024] 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.
[0025] In one embodiment, such as Figures 1-7As shown, a silent hinge includes a first leaf piece 11 and a second leaf piece 13. A first shaft cylinder 12 is symmetrically arranged on one side of the first leaf piece 11, and a second shaft cylinder 14 is fixedly arranged in the middle of one side of the second leaf piece 13. The first shaft cylinder 12 and the second shaft cylinder 14 are coaxially arranged, and each has a shaft hole in its middle. A shaft core 15 is fitted at the coaxial position of the first shaft cylinder 12 and the second shaft cylinder 14. One end of the shaft core 15 has a threaded hole, and a threaded rod 18 is fitted into the threaded hole. The threaded rod 18 is fixed to a first decorative cap 16. At one end, the other end of the shaft core 15 is closely fitted with a second decorative cap 17. A threaded tube is fixedly provided at one end of the first decorative cap 16 and the second decorative cap 17. The threaded tube is fitted into a threaded hole at one end of the first shaft cylinder 12. Both ends of the second shaft cylinder 14 are provided with mounting grooves. Each mounting groove is provided with a noise-reducing mechanism to prevent noise from being generated between the two ends of the first shaft cylinder 12 and the second shaft cylinder 14. The noise-reducing mechanism supports the connection between the first shaft cylinder 12 and the second shaft cylinder 14, thereby preventing wear noise from being generated between the two ends of the first shaft cylinder 12 and the second shaft cylinder 14.
[0026] The noise reduction mechanism includes bearings 20. Bearings 20 are fitted into the mounting slots at both ends of the second shaft cylinder 14. A bearing ring frame 22 is fixedly mounted on one side of the outer ring of each bearing 20. Several balls 25 are tightly fitted onto one side of each bearing ring frame 22. The balls 25 on the same side are fitted into a retainer 24. Several first fixing rods are fixedly mounted at equal intervals on one side of the retainer 24. The other end of each first fixing rod is fixed to one side of a fixing plate 23. The fixing plate 23 is located in a positioning slot at one end of the first shaft cylinder 12. An inner spline ring 21 is fixedly mounted inside the inner ring of each bearing 20. An outer spline shaft is fitted inside each inner spline ring 21. The outer spline shaft is fixedly mounted on a shaft core 15. In use, two bearings 20 are placed in the mounting slots, and two fixing plates 23 are installed in the positioning slots at one end of the two first shaft cylinders 12, making the first shaft cylinder 12 and the second shaft cylinder 14 coaxial. Then, the shaft core 15 is installed inside the shaft holes of the first shaft cylinder 12 and the second shaft cylinder 14. The outer spline shaft and the inner spline ring 21 on the shaft core 15 are connected by spline engagement. The ball bearing 25 is in close contact with one side of the bearing ring frame 22. The first decorative cap 16 and the second decorative cap 17 are installed at one end of the two first shaft cylinders 12, and the first decorative cap 16 is fixedly connected to the shaft core 15 by the threaded rod 18, so as to fix the shaft core 15. During installation, the first leaf 11 and the second leaf 13 are respectively installed on the two objects to be connected. When one object is suspended, the first shaft cylinder 12 and the second shaft cylinder 14 will not be in close contact because the ball bearing 25 is in close contact with one side of the bearing ring frame 22. When the first leaf 11 rotates, the inner ring of the bearing 20 is connected to the shaft core 15 by spline engagement, so that the second leaf 13 drives the outer ring of the bearing 20 to rotate through the second shaft cylinder 14. At the same time, the ball bearing 25 rotates inside the cage 24, thereby reducing noise.
[0027] Each bearing 20 has a fixed retaining ring 30 on its outer ring. Each retaining ring 30 has several limiting grooves. Each limiting groove has a slidable limiting block. Each limiting block is fixed inside the mounting groove. When the bearing 20 is installed, the limiting block slides into the limiting groove, so that after the retaining ring 30 is installed inside the limiting groove, the outer ring of the bearing 20 is fixedly connected to the second shaft cylinder 14.
[0028] The fixed plate 23 has several stop holes on one side. Each stop hole has a slidable limit post inside it. Each limit post has a rubber layer on its outer side. When the fixed plate 23 is installed, the stop holes slide on the limit posts, so that the first shaft cylinder 12 is fixedly connected to the fixed plate 23. At the same time, the rubber layer on the outer side of the limit posts can pre-fix the fixed plate 23.
[0029] The first decorative cap 16 is provided with an oiling channel, one end of which is provided with a threaded hole. A sealing screw 29 is fitted into the threaded hole. A first lubrication tube 26 is slidably provided inside the first shaft cylinder 12. A limiting ring 27 is tightly attached to one end of each of the first lubrication tubes 26. The limiting ring 27 is fixedly installed at one end of the shaft hole inside the first shaft cylinder 12. A second lubrication tube 28 is fitted into the shaft hole in the middle of the second shaft cylinder 14. In use, after the first leaf 11 and the second leaf 13 have been used for a long time, the sealing screw 29 is removed, and then lubricating material is added into the oiling channel. The lubricating material flows along the gap between the first lubrication tube 26 and the second lubrication tube 28 and the shaft core 15, thereby lubricating the parts inside the first shaft cylinder 12 and the second shaft cylinder 14.
[0030] Both the first lubrication pipe 26 and the second lubrication pipe 28 have a tapered end, which facilitates the even distribution of the lubricating material at one end of the first lubrication pipe 26 and the second lubrication pipe 28 before it flows when the lubricating material is added.
[0031] One end of the shaft core 15 is fixedly provided with a limiting block 19, and the middle part of the threaded tube at one end of the second decorative cap 17 is provided with a limiting hole that cooperates with the limiting block 19. When in use, during installation, the limiting block 19 is placed in the limiting hole to limit and fix the shaft core 15, thereby facilitating the installation of the first decorative cap 16.
[0032] The above embodiment discloses a silent hinge, wherein, during the assembly of the first leaf piece 11 and the second leaf piece 13, the second lubrication tube 28 is placed in the middle of the second shaft cylinder 14, and then the limiting block is slid into the limiting groove, so that after the stop ring 30 is installed inside the limiting groove, the outer ring of the bearing 20 is fixedly connected to the second shaft cylinder 14, and the stop hole slides on the limiting post, so that the first shaft cylinder 12 is fixedly connected to the fixing plate 23. At the same time, the rubber layer on the outside of the limiting post can pre-fix the fixing plate 23, so that the first shaft cylinder 12 and the second shaft cylinder 14 are coaxial. Then, the shaft core 15 is installed inside the shaft hole of the first shaft cylinder 12 and the second shaft cylinder 14. The outer spline shaft and the inner spline ring 21 on the shaft core 15 are connected by spline engagement, and the ball bearing 25... The first decorative cap 16 and the second decorative cap 17 are installed at one end of the two first shaft cylinders 12, and the first decorative cap 16 is fixedly connected to the shaft core 15 through the threaded rod 18, so as to fix the shaft core 15. During installation, the first leaf 11 and the second leaf 13 are respectively installed on the two objects to be connected. When one object is suspended, the first shaft cylinder 12 and the second shaft cylinder 14 will not be in close contact because the ball bearing 25 is in close contact with one side of the bearing ring 22. When the first leaf 11 rotates, the inner ring of the bearing 20 is connected to the shaft core 15 through the spline engagement, so that the first leaf 11 drives the outer ring of the bearing 20 to rotate through the second shaft cylinder 14. At the same time, the ball bearing 25 rotates inside the cage 24, thereby reducing noise.
[0033] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A silent hinge, comprising a first leaf piece (11) and a second leaf piece (13), wherein a first shaft cylinder (12) is symmetrically provided on one side of the first leaf piece (11), and a second shaft cylinder (14) is fixedly provided in the middle of one side of the second leaf piece (13), the first shaft cylinder (12) and the second shaft cylinder (14) are coaxially arranged, and both the first shaft cylinder (12) and the second shaft cylinder (14) are provided with shaft holes in the middle, characterized in that, The first shaft cylinder (12) and the second shaft cylinder (14) are coaxially fitted with a shaft core (15). One end of the shaft core (15) is provided with a threaded hole, and a threaded rod (18) is fitted in the threaded hole. The threaded rod (18) is fixedly installed at one end of the first decorative cap (16). The other end of the shaft core (15) is tightly fitted with a second decorative cap (17). One end of the first decorative cap (16) and the second decorative cap (17) is fixedly provided with a threaded tube, which is fitted in the threaded hole at one end of the first shaft cylinder (12). Both ends of the second shaft cylinder (14) are provided with mounting grooves, and each mounting groove is provided with a noise-reducing mechanism to prevent noise from being generated between the two ends of the first shaft cylinder (12) and the second shaft cylinder (14).
2. A silent hinge according to claim 1, characterized in that, The silent mechanism includes bearings (20). Bearings (20) are fitted in the mounting grooves at both ends of the second shaft cylinder (14). A bearing ring frame (22) is fixedly provided on one side of the outer ring of the bearing (20). A number of balls (25) are tightly attached to one side of the bearing ring frame (22). The balls (25) on the same side are fitted inside a retainer (24). A number of first fixing rods are fixedly provided at equal intervals on one side of the retainer (24). The other end of each first fixing rod is fixedly provided on one side of a fixing plate (23). The fixing plate (23) is located in a positioning groove at one end of the first shaft cylinder (12). An inner spline ring (21) is fixedly provided inside the inner ring of the bearing (20). An outer spline shaft is fitted inside the inner spline ring (21). The outer spline shaft is fixedly provided on the shaft core (15).
3. A silent hinge according to claim 2, characterized in that, Each bearing (20) has a fixed stop ring (30) on its outer ring. Each stop ring (30) has a number of limiting grooves. Each limiting groove has a limiting block that slides in it. Each limiting block is fixed inside the mounting groove.
4. A silent hinge according to claim 2, characterized in that, The fixed plate (23) has several stop holes on one side, and each stop hole has a sliding limit post inside, and each limit post has a rubber layer on the outside.
5. A silent hinge according to claim 1, characterized in that, The first decorative cap (16) is provided with an oiling channel, one end of which is provided with a threaded hole, and a sealing screw (29) is fitted inside the threaded hole. The first shaft cylinder (12) is provided with a first lubrication tube (26) that slides inside. One end of the first lubrication tube (26) is provided with a limiting ring (27) that is tightly attached to it. The limiting ring (27) is fixedly installed at one end of the shaft hole inside the first shaft cylinder (12). The second shaft cylinder (14) is provided with a second lubrication tube (28) that fits inside the shaft hole in the middle.
6. A silent hinge according to claim 5, characterized in that, Both the first lubrication tube (26) and the second lubrication tube (28) have a tapered end.
7. A silent hinge according to claim 1, characterized in that, One end of the shaft core (15) is fixedly provided with a limiting block (19), and the middle part of the threaded tube at one end of the second decorative cap (17) is provided with a limiting hole that cooperates with the limiting block (19).