Hydraulic hinge

Abstract

The utility model belongs to the technical field of hardware fittings, and provides a hydraulic hinge which comprises a middle shaft, a left blade, a right blade, an upper sealing head, a lower sealing head, a transmission shaft, a spring, a rolling sleeve and a hydraulic cylinder, the left blade and the right blade are both movably arranged on the outer side of the middle shaft in a sleeved mode, and the upper sealing head is movably connected with one end of the middle shaft through a bearing. A hydraulic cylinder is fixedly installed on the side, close to the middle shaft, of the lower sealing head, the hydraulic cylinder is fixedly connected with the middle shaft, the outer side of the hydraulic cylinder is movably sleeved with a rolling sleeve, and the rolling sleeve is fixedly connected with the right blade; the hydraulic cylinder mechanism is introduced, the flow speed of hydraulic oil in the hydraulic cylinder is controlled, slow and stable closing of the door is achieved, compared with a traditional hinge, noise and vibration generated when the door body collides with a door frame are greatly reduced through the design, and a quiet and comfortable indoor environment is created for a user. The noise reduction effect of the hydraulic hinge is particularly remarkable in occasions needing to be kept quiet, such as libraries, hospitals and bedrooms.

Description

Technical Field

[0001] This utility model belongs to the field of hardware accessories technology, specifically relating to a hydraulic hinge. Background Technology

[0002] In daily life and various buildings, doors and windows serve as vital channels connecting the interior and exterior. Their smooth opening and closing, noise control, and durability are always a focus for users and designers. Hinges, as one of the core components of doors and windows, directly impact the user experience. Traditional self-closing hinges, especially those based on torsion springs, while achieving some success in realizing automatic closing, have revealed a series of problems in practical applications. These problems not only affect the user experience but also impact the long-term stability and durability of the product.

[0003] First, torsion spring return hinges often face a dilemma in material selection. On the one hand, to ensure sufficient strength and durability, materials with high wire strength are needed. However, such materials often lack toughness and are prone to spring breakage under prolonged use and frequent opening and closing, especially under significant external impacts such as strong winds or forceful door opening and closing, significantly increasing the risk of breakage. On the other hand, reducing wire strength to enhance toughness can reduce breakage to some extent, but this also leads to spring relaxation, causing the self-closing function to fail and the door to fail to remain tightly closed. This not only affects the sealing of doors and windows but may also create safety hazards. Second, traditional self-closing door hinges usually require distinguishing between left and right directions during installation, increasing the complexity and error rate. For non-professional installers, incorrect installation often requires disassembly and reinstallation, which is not only time-consuming and laborious but may also damage the hinge. Furthermore, since the left and right hinges are not interchangeable, users need to pay special attention to their compatibility with their doors and windows when purchasing hinges, increasing the complexity and inconvenience of the selection process. Traditional hinges lack an effective mechanism for adjusting closing speed and force. During the closing process, the door often slams against the door frame at a relatively high speed, generating significant noise and vibration. This not only affects the quietness of the indoor environment but may also damage the door frame and hinges, shortening their lifespan. Utility Model Content

[0004] The purpose of this utility model is to provide a hydraulic hinge that can not only achieve automatic door closing, but also flexibly adjust the closing speed and force according to user needs.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A hydraulic hinge, comprising:

[0007] The system comprises a central shaft, a left blade, a right blade, an upper end cap, a lower end cap, a drive shaft, a spring, a roller sleeve, and a hydraulic cylinder. The left and right blades are movably fitted onto the outside of the central shaft. The upper end cap is movably connected to one end of the central shaft via a bearing. A hydraulic cylinder is fixedly installed on the lower end cap near the central shaft and is fixedly connected to the central shaft. A roller sleeve is movably fitted onto the outside of the hydraulic cylinder and is fixedly connected to the right blade. The left blade is fixedly connected to the upper end cap. The upper end cap is fixedly connected to the drive shaft, which is movably installed inside the central shaft. A spring is movably fitted onto the outside of the drive shaft. A cam is movably installed inside the hydraulic cylinder and slides against the inner wall of the cylinder. A curved groove is formed on the outside of the cam, and a pin is movably installed inside the curved groove, sliding against the inner wall of the groove. One end of the drive shaft is fixedly connected to the pin. A pin hole is formed on the outside of the roller sleeve, and the pin extends into the pin hole.

[0008] Preferably, the side of the cam closest to the spring abuts against the spring, a one-way valve is fixedly installed inside the cam, the one-way valve has an opening inside, and a valve needle is provided inside the hydraulic cylinder, the valve needle being in contact with the inner wall of the opening.

[0009] Preferably, the drive shaft extends into the cam, a spline is provided on the outer side of the drive shaft, and a spline groove is provided inside the cam, with the spline slidingly engaging with the inner wall of the spline groove.

[0010] Preferably, an adjusting bolt is screwed into the inside of the drive shaft, and a pressure rod is movably installed inside the drive shaft through a slot. The pressure rod abuts against one side of the spring, and the end of the adjusting bolt near the pressure rod abuts against the pressure rod.

[0011] Preferably, a speed regulating bolt is installed inside the lower end cap by threaded engagement, and the end of the speed regulating bolt near the valve needle is movably connected to the valve needle.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) This utility model introduces a hydraulic cylinder mechanism and controls the flow rate of hydraulic oil inside the hydraulic cylinder to achieve slow and smooth door closing. Compared with traditional hinges, this design greatly reduces the noise and vibration generated when the door hits the door frame, creating a quieter and more comfortable indoor environment for users. Especially in places where quiet is required, such as libraries, hospitals, and bedrooms, the noise reduction effect of hydraulic hinges is particularly significant. At the same time, because the closing process is smoother, it also avoids the fright or injury that may be caused by the rapid closing of the door, thus improving the safety of use.

[0014] (2) The hydraulic buffer mechanism of this utility model effectively reduces the impact of the door body on the door frame and hinges, extends the service life of the product, and effectively disperses the impact force when the door body is closed through the damping effect of hydraulic oil, protects the integrity of the hinges and door frame, and improves the durability and stability of the product.

[0015] (3) This utility model allows either the left or right blade to be installed on the door frame, realizing a universal installation method that simplifies the installation process and reduces the installation error rate. It also eliminates the need for users to pay special attention to the matching of their doors and windows when purchasing hinges, thus improving the convenience and flexibility of purchasing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the elevation structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the central axis structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the transmission shaft position structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the pin position structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the one-way valve position structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the spline groove position structure of this utility model;

[0023] Figure 8 This is a schematic diagram of the force-adjusting bolt structure of this utility model.

[0024] In the diagram: 1. Central shaft; 2. Left blade; 3. Right blade; 4. Upper end cap; 5. Lower end cap; 6. Drive shaft; 7. Spring; 8. Roller sleeve; 9. Hydraulic cylinder; 10. Cam; 11. Curved groove; 12. Pin; 13. Pin hole; 14. Check valve; 15. Hole; 16. Valve needle; 17. Spline; 18. Spline groove; 19. Adjusting bolt; 20. Pressure rod; 21. Speed ​​adjusting bolt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] Please see Figure 1 - Figure 8 As shown, a hydraulic hinge includes:

[0028] The components include a central shaft 1, left blade 2, right blade 3, upper end cap 4, lower end cap 5, drive shaft 6, spring 7, rolling sleeve 8, and hydraulic cylinder 9. Left blade 2 and right blade 3 are movably sleeved on the outside of the central shaft 1. The upper end cap 4 is movably connected to one end of the central shaft 1 via a bearing. A hydraulic cylinder 9 is fixedly installed on the side of the lower end cap 5 near the central shaft 1. The hydraulic cylinder 9 is fixedly connected to the central shaft 1. A rolling sleeve 8 is movably sleeved on the outside of the hydraulic cylinder 9. The rolling sleeve 8 is fixedly connected to the right blade 3. The left blade 2 is fixedly connected to the upper end cap 4. The upper end cap 4... The transmission shaft 6 is fixedly connected to the drive shaft 6, which is movably installed inside the central shaft 1. The spring 7 is movably sleeved on the outside of the drive shaft 6. The cam 10 is movably installed inside the hydraulic cylinder 9. The cam 10 slides against the inner wall of the hydraulic cylinder 9. A curved groove 11 is opened on the outside of the cam 10. A pin 12 is movably installed inside the curved groove 11. The pin 12 slides against the inner wall of the curved groove 11. One end of the drive shaft 6 is fixedly connected to the pin 12. A pin hole 13 is opened on the outside of the roller sleeve 8. The pin 12 extends into the pin hole 13.

[0029] Please see Figure 5 - Figure 7 As shown, specifically, the side of the cam 10 closest to the spring 7 abuts against the spring 7. A one-way valve 14 is fixedly installed inside the cam 10. The one-way valve 14 has a hole 15 inside. A valve needle 16 is provided inside the hydraulic cylinder 9. The valve needle 16 fits against the inner wall of the hole 15. The drive shaft 6 extends into the cam 10. A spline 17 is provided on the outer side of the drive shaft 6. A spline groove 18 is provided inside the cam 10. The spline 17 slides against the inner wall of the spline groove 18.

[0030] As can be seen from the above, a curved groove 11 is opened on the outer side of the cam 10. When the pin 12 slides inside the curved groove 11, it will drive the cam 10 to move upward, and then synchronously drive the one-way valve 14 to move upward, changing the state between the one-way valve 14 and the valve needle 16. The valve needle 16 is designed to be wider at the top and narrower at the bottom. The valve needle 16 fits into the hole 15 of the one-way valve 14. When the one-way valve 14 moves with the cam 10, it can change the position of the oil inside the hydraulic cylinder 9. For example, when the one-way valve 14 moves upward, the amount of oil in the upper half of the hydraulic cylinder 9 will decrease. When the one-way valve 14 moves downward, the amount of oil in the lower half will decrease. The gap between the valve needle 16 and the hole 15 affects the speed of oil return and oil discharge. The pin hole 13 can synchronously drive the pin 12 to move, and then drive the cam 10 to move. Through the cooperation of the spline groove 18 and the spline 17, the cam 10 achieves the effect of sliding on the outer wall of the transmission shaft 6. The spring 7 abuts against one side of the cam 10. When the spring 7 rebounds, it will push the cam 10 to reset.

[0031] Please see Figure 6 - Figure 8 As shown, specifically, a force-adjusting bolt 19 is screwed into the inside of the drive shaft 6, and a pressure rod 20 is movably installed inside the drive shaft 6 through a slot. The pressure rod 20 abuts against one side of the spring 7. The end of the force-adjusting bolt 19 near the pressure rod 20 abuts against the pressure rod 20. A speed-adjusting bolt 21 is screwed into the inside of the lower end cap 5, and the end of the speed-adjusting bolt 21 near the valve needle 16 is movably connected to the valve needle 16.

[0032] As can be seen from the above, by rotating the force adjusting bolt 19, the contact force between the pressure rod 20 and one end of the spring 7 can be changed. The pressure rod 20 and the cam 10 respectively abut against the two ends of the spring 7. Therefore, the rotation of the force adjusting bolt 19 will change the force on the spring 7, that is, change the rebound force of the spring 7. By rotating the speed adjusting bolt 21, the height of the valve needle 16 inside the hydraulic cylinder 9 can be changed. This adjustment changes the speed of the one-way valve 14 moving up and down (changing the gap between the valve needle 16 and the hole 15), that is, the oil return and oil discharge speed of the hydraulic cylinder 9, thereby realizing the precise adjustment of the closing speed. The end of the speed adjusting bolt 21 is connected to the valve needle 16 in a ball head structure. A ball is provided on the side of the valve needle 16 near the speed adjusting bolt 21. The ball is locked in the groove at the end of the speed adjusting bolt 21, and the ball can rotate in the groove, which also allows the valve needle 16 to move up and down with the speed adjusting bolt 21.

[0033] In practical use, when the left blade 2 is fixedly installed on the door frame, the right blade 3 rotates with the door. When the right blade 3 swings, it will drive the roller sleeve 8 to rotate on the outside of the cam 10. The pin hole 13 drives the pin 12 to slide along the curved groove 11 inside the cam 10, which drives the cam 10 to move upward and squeeze the spring 7 on the outside of the transmission shaft 6. The spring 7 is in a squeezed state. At the same time, the one-way valve 14 moves upward inside the hydraulic cylinder 9. Under the action of hydraulic oil, the door will open slowly. After the door opens 90 degrees, the pin 12 stops on the stopping platform of the curved groove 11 (the relatively gentle plane inside the curved groove 11). When the door is closed, the spring 7 drives the cam 10 to slowly return to its original position, and the door will close slowly.

[0034] When the right blade 3 is installed on the door frame, the left blade 2 will rotate with the door. When the left blade 2 rotates, since the left blade 2 is fixedly connected to the drive shaft 6, the drive shaft 6 drives the pin 12 to move inside the curved groove 11, which in turn drives the cam 10 to move upward and squeeze the spring 7. The spring 7 is compressed and under force. When the cam 10 moves, it still drives the one-way valve 14 to move inside the hydraulic cylinder 9, which causes the flow rate of the hydraulic oil to change. Other principles are the same as those described above.

[0035] This structure does not distinguish between the left and right sides of the hinge, allowing either the left leaf 2 or the right leaf 3 to be installed on the door frame, which improves the flexibility of installation. However, the upper end cap 4 must be kept above the installation position during installation.

[0036] This application can be applied to soundproof door renovation projects in high-end residences. For example, in a high-end residential area in the city center, a villa is undergoing a comprehensive home upgrade. To improve the quality of life, the homeowner is particularly concerned about noise control in the indoor environment, especially in the study and bedroom, two areas requiring a high degree of tranquility. While the original wooden doors were aesthetically pleasing, they always made a loud noise when closing, affecting the quiet atmosphere of the room. Therefore, the homeowner decided to use the hydraulic hinges provided in this application to renovate the interior doors to achieve a smoother, quieter closing effect. The specific implementation steps are as follows:

[0037] S1. First, the project team conducted a detailed analysis of each door in the residence, including the door's weight, size, usage environment, and the residents' needs, and determined the installation location and quantity.

[0038] S2, the project team had in-depth communication with the hinge manufacturer and customized the appropriate hinge size according to the size and weight of the door;

[0039] Before installation, the S3 project team provided professional training to the installers to ensure they were familiar with the hinge installation steps and precautions. At the same time, the team prepared the necessary installation tools, materials and safety equipment to ensure the smooth progress of the installation process.

[0040] S4. Remove the original torsion spring reset hinge from the door and clean the residue on the door and door frame.

[0041] S5. According to the design requirements, mark the installation positions of the hinges on the door body and door frame to ensure accurate hinge installation;

[0042] S6. Use an electric drill to drill suitable mounting holes in the door body and door frame, then fix the hinge mounting accessories in the holes and install the hinge body;

[0043] After installation, the hinges of the S7 are debugged and tested to ensure that they can close the door automatically and at a moderate speed without noise or vibration.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic hinge, characterized in that, include: The structure includes a central shaft (1), a left blade (2), a right blade (3), an upper end cap (4), a lower end cap (5), a drive shaft (6), a spring (7), a rolling sleeve (8), and a hydraulic cylinder (9). The left blade (2) and right blade (3) are movably sleeved on the outside of the central shaft (1). The upper end cap (4) is movably connected to one end of the central shaft (1) via a bearing. A hydraulic cylinder (9) is fixedly installed on the side of the lower end cap (5) near the central shaft (1). The hydraulic cylinder (9) is fixedly connected to the central shaft (1). A rolling sleeve (8) is movably sleeved on the outside of the hydraulic cylinder (9). The rolling sleeve (8) is fixedly connected to the right blade (3). The left blade (2) is fixedly connected to the upper end cap (4). The upper end cap... (4) It is fixedly connected to the drive shaft (6). The drive shaft (6) is movably installed inside the central shaft (1). The spring (7) is movably sleeved on the outside of the drive shaft (6). A cam (10) is movably installed inside the hydraulic cylinder (9). The cam (10) slides against the inner wall of the hydraulic cylinder (9). A curved groove (11) is opened on the outside of the cam (10). A pin (12) is movably installed inside the curved groove (11). The pin (12) slides against the inner wall of the curved groove (11). One end of the drive shaft (6) is fixedly connected to the pin (12). A pin hole (13) is opened on the outside of the sleeve (8). The pin (12) extends into the pin hole (13).

2. A hydraulic hinge according to claim 1, characterized in that, The cam (10) abuts against the spring (7) on the side closest to the spring (7). A one-way valve (14) is fixedly installed inside the cam (10). A hole (15) is opened inside the one-way valve (14). A valve needle (16) is provided inside the hydraulic cylinder (9). The valve needle (16) fits against the inner wall of the hole (15).

3. A hydraulic hinge according to claim 2, characterized in that, The drive shaft (6) extends into the cam (10). A spline (17) is provided on the outside of the drive shaft (6). A spline groove (18) is provided inside the cam (10). The spline (17) slides against the inner wall of the spline groove (18).

4. A hydraulic hinge according to claim 2, characterized in that, The drive shaft (6) has an adjustable bolt (19) screwed inside by thread, and a pressure rod (20) is installed inside the drive shaft (6) by slotting. The pressure rod (20) abuts against one side of the spring (7), and the end of the adjustable bolt (19) near the pressure rod (20) abuts against the pressure rod (20).

5. A hydraulic hinge according to claim 2, characterized in that, The lower end cap (5) is fitted with a speed regulating bolt (21) by threaded engagement. The end of the speed regulating bolt (21) near the valve needle (16) is movably connected to the valve needle (16).

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